Post on 13-Oct-2020
Shanxi Yangguang Power Generation Co., Ltd.
Compliance Evaluation Report of
Environmental Management Plan (EMP) and
Environmental Auditing Report (EAR)
&
Supplemental EMP for Energy Conservation
Rehabilitation Project of #2 Boiler
Owner: Shanxi Yangguang Power Generation Co., Ltd.
Prepared by: China Institute for Radiation Protection
March 2012
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Project Name
Compliance Evaluation Report of Environmental Management Plan
(EMP) and Environmental Auditing Report & Supplemental EMP for
Energy Conservation Rehabilitation Project of #2 Boiler of Yangguang
Power Plant
Contractor China Institute for Radiation Protection
Project Manager Shi Xuefeng (Registration No.: A13020151300)
Project Verifier Zhang Jianxin (Registration No.: A13020020400)
Project Approver Ma Hongyou (Registration No.: A13020110400)
CONTENTS
1 Preface
1.1 Project Background and Progress ·························································· 4
1.2 Preparation Basis ············································································· 4
1.3 Execution Standard ··········································································· 6
2 Compliance Evaluation Report of Original EMP and EAR
2.1 Compliance of Original EMP ······························································· 8
2.2 Compliance of EAR ········································································· 18
2.3 Sum ···························································································· 18
3 Denitration, Demercuration and Proposed Environmental Protection Measures
during Recent Period
3.1 NOx Pollution Prevention and Control ··················································· 20
3.2 Heavy Metal (Mercury) Pollution Prevention and Control ···························· 20
3.3 Proposed Environmental Protection Measures ·········································· 21
4 Occupational Health and Safety
4.1 Occupational Health Rules ································································· 23
4.2 Occupational health management plan ··················································· 23
4.3 Implementation and Corrective Measures Concerning Occupational Sanitation
Control ····························································································· 29
4.4 Sum ···························································································· 29
5 Environmental Risk Mitigation Measures and EMP for Rehabilitation Project
of #2 Boiler
5.1 Profile of High-voltage Variable Frequency Speed Control System Project of
#2 Boiler ··························································································· 31
5.2 Environmental Risk Mitigation Measures during Construction Period,
EMP and Environmental Impact Analysis ···················································· 31
5.3 Environmental Risk Mitigation Measures and EMP during Operation Period ····· 33
6 Conclusion ········································································ 37
Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report &
Supplemental EMP for Energy Conservation Rehabilitation Project of #2 Boiler of Yangguang Power Plant
4
1. Preface
This report is formulated on the basis of Environmental Management Plan (EMP) for
Energy Conservation Rehabilitation Project of Yangguang Power Plant,
Environmental Impact Evaluation for Energy Conservation Rehabilitation Project of
Yangguang Power Plant, and Environmental Auditing Report; the report evaluates the
implementation of original EMP and further supplements the EMP based on the
newly-increased high-voltage variable frequency speed control system of #2 boiler;
meanwhile, the related provisions stipulated in Environmental, Health, and Safety
Guidelines for Thermal Power Plants (EHS) are listed in this report.
1.1 Project Background and Progress
Shanxi Yangguang Power Generation Co., Ltd. (hereinafter referred to as
“Yangguang Power Plant”), located in Pingding County, Yangquan City, is 4 km and
15km away from Pingding County and Yangquan City. Yangguang Power Plant is
adjacent to Shitai Expressway, with convenient traffic conditions. Yangguang adopts
condensing coal-fired turbine generating units, with the total installed capacity of
4×300MW and evaporation capacity of 4,100t/h.
Yangguang Power Plant has proposed 4 subprojects under the support of GEF Grant,
namely, Air Sealing Retrofit of #4 Turbine, High-Pressure Variable-Frequency Speed
Control System for #1 Boiler, Online Monitoring Device for Coal Dust Pipe of #4
Boiler and Software Development Project for Negative Balance Coal Consumption
Calculation. So far, the rehabilitation projects which are under progress are as
follows:
Table 1.1-1 Energy Conservation Rehabilitation Projects Under Progress
Project Name Contents Effect Progress Implementation
Period
Air Sealing Retrofit
of #4 Turbine
Air Sealing
Replacement
Annual coal equivalent
saved 10,566 tons; coal
consumption down by
5.87g/kwh for single
turbine
Completed
Overhaul period
of #4 turbine
during March to
April 2008
High-Pressure
Variable-Frequency
Speed Control
System for #1
Boiler
Installation of
Frequency
Converter on #1
Boiler
Estimate annual coal
equivalent saved: 1,560
tons; auxiliary power
consumption rate down
by 0.045%; coal
consumption down by
0.195g/kwh
Under progress
and equipment
has been
delivered to
Yangguang
Overhaul period
of #1 turbine
during August
2012
1.2 Preparation Basis
1.2.1 Law, Regulation and Policy Basis
(1) “Environmental Protection Laws of PRC”, December 1989;
Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report &
Supplemental EMP for Energy Conservation Rehabilitation Project of #2 Boiler of Yangguang Power Plant
5
(2) “Law on Prevention and Control of Atmospheric Pollution of PRC”, amended in
April, 2000;
(3) “Implementation Rules of Water Pollution Prevention and Control Law”, amended
in March 2000;
(4) “Environmental Noise Prevention and Control Law of PRC”, November 1996;
(5) “Solid Waste Pollution Prevention Law of PRC”, amended in December 2004;
(6) “Law of Environmental Impact Assessment of PRC”, October 2002;
(7) “Law of Promotion of Cleaner Production of PRC”, June 2002;
(8) “Notification on Strengthening the Environmental Impact Assessment in the
Projects Financed by International Finance Organizations”, issued by the State
Environmental Protection Administration (No.324, [1993]) on June 21, 1993;
(13) “Notification on the Issuance of Mid- and Long- term Special Planning”, issued
by National Development and Reform Commission (No. 2505, [2004]), November 25,
2004;
(14) “Decisions on Implementation of Scientific Development View and
Strengthening of Environmental Protection”, issued by the State Council (No. 39,
[2005]), in 2005;
(15 “Decisions on Enhancing Energy Conservation”, issued by issued by the State
Council (No. 28, [2006]), August 6, 2006;
(16) “Notification on the Issuance of the Comprehensive Working Plan of Energy
Conservation and Pollution Reduction”, issued by the State Council (No. 15, [2007]),
May 23, 2007.
1.2.2 Relevant Regulations of World Bank
(1) World Bank OP/BP4.01 and its Appendixes (Environmental Assessment), January
1999.
(2) World Bank OP/(Environmental Assessment), January 1999.
(3) World Bank GP4.01 (Environmental Assessment), January 1999.
(4) Environmental, Health, and Safety Guidelines for Thermal Power Plants,
December 2008
1.2.3. Technical Documents
(1) Environmental Management Plan for Energy Conservation Rehabilitation Project
of Yangguang Power Plant, China Institute for Radiation Protection, Jan. 2008;
(2) Environmental Impact Evaluation for Energy Conservation Rehabilitation Project
of Yangguang Power Plant, China Institute for Radiation Protection, Jan. 2008;
(3) Environmental Auditing Report for Energy Conservation Rehabilitation Project of
Yangguang Power Plant, China Institute for Radiation Protection, Jan. 2008;
Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report &
Supplemental EMP for Energy Conservation Rehabilitation Project of #2 Boiler of Yangguang Power Plant
6
(4) Relevant technical documents provided by the project owner
1.3 Execution Standard
1.3.1 Construction Period
The Noise Limits for Construction Site (GB12523-90) is applicable to noise control
within the boundary of the construction site; see Table 1.3-1 for the criteria.
Table 1.3-1 Noise Limits for Construction Site
Construction Phase Main Noise Source Standard Limits (dB(A))
Day time Night time
Architectural
Construction
Concrete vibrators, electric
saws, etc. 70 55
Interior Fitment Cranes, elevators, etc. 65 55
1.3.2 Operation Period
(1) Emission Standard for Air Pollutants
The emission concentration of boiler flue gas shall not exceed the maximum
permissible emission concentration during Time Period III stipulated in Emission
Standard of Air Pollutants for Thermal Power Plants (GB13223-2003).
Table 1.3-2 Air Pollutants Emission Standard for Thermal Power Plant
Type of Boiler Pollutants Maximum Emission Concentration
at Time Period III (mg/m3)
Coal-fired
Boiler
Smoke and Dust 500
SO2 400
NOX 1100
Note: Vdaf<10%
(2) Wastewater Discharge Standard
The wastewater discharge is subject to the Category-I standard as described in Table 4
of “Integrated Wastewater Discharge Standard (GB8978-1996). The details are shown
in Table 1.3-4.
Table 1.3-4 Integrated Wastewater Discharge Standard
Pollutant Standard Pollutant Standard Pollutant Standard
pH 6~9 Petroleum 5 CODCr 100
Suspended
particulates 70 Fluorides 10
Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report &
Supplemental EMP for Energy Conservation Rehabilitation Project of #2 Boiler of Yangguang Power Plant
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(3) Noise Emission Standard
Within the western, southern and eastern boundary of the Power Plant the noise is
subject to Category-II standard as defined in Noise Standard within Boundary of
Industrial Site (GB12348-90); and at the northern boundary the noise is subject to
Category-IV standard of GB12348-90. The standard limits are shown in Table 1.3-5
Table 1.3-5. Noise Standard within Boundary of Industrial Site
Category Standard (dB(A))
Day time Night time
Category II 60 50
Category IV 70 55
(4) Solid Waste Storage Standard
Solid waste disposal is subject to Standard for Pollution Control in Storage and
Disposal Site for Common Industrial Solid Wastes (GB18599-2001).
Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report &
Supplemental EMP for Energy Conservation Rehabilitation Project of #2 Boiler of Yangguang Power Plant
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2 Compliance Evaluation Report of Original EMP and EAR
2.1 Compliance of Original EMP
Among the original 4 rehabilitation subprojects supported by GEF Grant, the Air
Sealing Retrofit of #4 Turbine has been completed.
2.1.1 Compliance of Environmental Risk Mitigation Measures
(1) Main Environmental Risk Mitigation Measures during Construction Period
The air sealing retrofit of #4 turbine has a short construction period and small
engineering amount, without any wastewater discharge. During the construction,
small amount dust were produced, the ventilation has been enhanced to meet the
emission standard. The construction site is within the turbine generators set, there was
almost no impact on the surrounding acoustic environment. The waste air sealing that
has been replaced during the construction has been collected and sold by Supply
Department of Yangguang so that the solid waste has been properly handled.
(2) Main Environmental Risk Mitigation Measures during Operation Period
During the retrofit of #4 air sealing, only the air sealing has been replaced and no
component of boiler and turbine has been changed. After the retrofit project, the coal
consumption and evaporation capacity have not been changed, however, the sealing
performance has been improved and the steam loss has been reduced; therefore, after
the completion of the retrofit project, under the same power generation capacity, the
emissions of waste gas, wastewater, solid waste and noise are reduced, so that the
effect of energy conservation and emission reduction has been realized.
2.1.2 Compliance of EMP
The compliance table of EMP is shown in Table 2.1-2.
Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report & Supplemental EMP for Energy Conservation Rehabilitation Project of #2
Boiler of Yangguang Power Plant
9
Table 2.1-1 Main Environmental Impact and Mitigation Measures during Construction Period of Air Sealing Retrofit for #4 Turbine
Peri
od
Environmental
Factors Main Environmental Impact Proposed Mitigation Measures
Compliance of Mitigation
Measures Effect Contractor Supervisor
Co
nstru
ction P
eriod
Ambient Air
A small amount of welding
smoke was produced during
the cutting, welding and
drilling.
There was small amount of
welding smoke and the ventilation
shall be enhanced.
The site ventilation has been
enhanced accordingly.
The emission standard has
been met, without impact on
ambient air.
Harbin
Tongneng
Electrical
Co., Ltd.
Yangguang
Power Plant &
Yangquan
Municipal EPB
Water No wastewater was
produced. — —
No wastewater was
discharged.
Sound The noise at 60 ~ 70B(A)
was produced.
The low noise equipment shall be
selected.
The emission standard has
been met, without any
impact on surrounding
acoustic environment.
Solid Waste
The total of 22 sets air
sealing were replaced, the
main components of which
include iron, manganese and
chrome.
After disassembled on the site, the
waste air sealing shall be
collected and sold by the Supply
Department.
22 sets of sealing rings have
been replaced and have been
collected and sold by
Yangguang.
The solid waste has been
properly disposed of.
Table 2.1-2 Compliance of Environmental Monitoring Plan during Construction Period of Air Sealing Retrofit for #4 Turbine
No. Environmental
Factors Monitoring Spot Monitoring Item
Monitoring
Frequency Owner
Monitoring and
Supervision Unit Compliance of EMP
1 Ambient Air Peripheral of construction
site and office area TSP
Once per month and
2 days for once
Yangguang
Yangguang Power
Plant & Yangquan
Municipal EPB
The air sealing retrofit of #4
turbine was carried out inside the
generating sets, without any
impact on ambient air and
acoustic environment. During the
construction period, the statistics
on solid waste has been carried
out.
2 Noise
1m away from boundaries of
construction site and
Yangguang
Leq
Once per month and
at daytime and
nighttime
respectively
3 Solid Waste Construction Site Name, amount and
whereabout of solid waste Once per month
Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report & Supplemental EMP for Energy Conservation Rehabilitation Project of #2
Boiler of Yangguang Power Plant
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Table 2.1-3 Main Environmental Impact and Mitigation Measures during Operation Period of #4 Air Sealing Retrofit
Stage
Environ
mental
Factors
Item Major Environmental
Impacts Proposed Mitigation Measures Contractor Supervisor
Compliance or
Not
Op
eration
Perio
d
Ambient
Air
Boiler
Flue Gas
Major pollutants SO2, dust,
NO2 contained in flue gas
emitted from coal-fired
boiler
(1) #1 and #3 boilers shall be equipped with electrostatic
precipitators, with dust removal efficiency of over 99.9%; #2 and #4
boilers shall be equipped with bag-type precipitators, with dust
removal efficiency of over 99.9%; dust emission concentration
<30mg/m3.
(2) Limestone-gypsum wet desulfurization process shall be adopted,
with desulfurization efficiency of over 90%, SO2 emission
concentration ≤400mg/m3.
(3) NOx emission concentration ≤100mg/m3
(4) Flue gas on-line monitoring device shall be installed so as to
facilitate supervision and management of exhaust gas pollution
source and to reduce air pollution.
Yangguang
Power
Plant
Yangquan
Municipal
EPB
The mitigation
measures have
been taken
accordingly.
Coal
(Powder)
Dust
Unorganized emission of
dust during the storage and
transportation of coal, ash
and slag
(1) Transport vehicles shall be covered with canopies.
(2) Wind-shield and dust-suppression walls shall be built around the
coal fields, and water-spraying facilities are provided. Such measures
can reduce the dust at coal field by more than 70%.
(3) The belt room of coal transmission room and coal scuttle of coal
storage room shall be installed with bag filter to remove the dust.
(4) The coal handling gallery shall adopt the belt conveyor for closed
transportation.
(5) The afforestation shall be enhanced so that the afforested area
accounts for 80% of total area.
Water
Environ
ment
Waste
water
Production wastewater
mainly includes: circulation
cooling water, wastewater
from reverse osmosis water
treatment system,
acid/alkali-containing
wastewater generated from
preparation of chemical
demineralized water,
domestic sewage, flue gas
(1) Industrial wastewater mainly includes: recycled acid-alkaline
wastewater from chemical water treatment system, backwash
wastewater from filter and reverse osmosis device, resin-containing
wastewater from condensate fine treatment system, wastewater from
boiler cleaning, flushing water of main workshop. The wastewater
drained from the industrial production system enters the industrial
wastewater treatment system to filter the big suspended solids. After
precipitation, the wastewater enters purifying pool before it is used in
coal handling system, spraying coal yard or ash flushing.
(2) The wastewater treatment system shall be installed which is
Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report & Supplemental EMP for Energy Conservation Rehabilitation Project of #2
Boiler of Yangguang Power Plant
11
desulfurization wastewater,
coal handling system,
wastewater from coal yard,
etc.
mainly used to collect and dispose of the flushing and dedusting
water from coal handling gallery. After precipitation and filter, it can
be used repeatedly.
(3) The desulfurization wastewater, after treated, can be used for dry
ash humidification.
(4) Domestic wastewater, after treated by domestic wastewater
treatment system, shall be pumped into recovery tank and for dust
removal.
With the implementation of aforesaid measures, wastewater shall be
totally utilized in a comprehensive way, and there is no other
wastewater drained outside.
Op
eration
Perio
d
Acoustic
Environ
ment
Noise
The noise level of boiler
draught fan, blower, coal
mill, feed pump, steam
turbine, generator and exciter
is generally between 90 ~
100dB (A)
A variety of measures such as noise elimination, sound insulation,
vibration attenuation, etc., shall be taken to ensure that within the
western, southern and eastern boundary of Yangguang, the noise
emission can meet Category-II standard as defined in Noise Standard
within Boundary of Industrial Site (GB12348-90); and at the
northern boundary the noise emission can meet Category-IV
standard of GB12348-90.
Yangguang
Power
Plant
Yangquan
Municipal
EPB
The mitigation
measures have
been taken
accordingly.
Solid
Waste Slag
Major solid wastes include
pulverized fly ash, slag and
desulfurization gypsum
(1) The separate ash and slag removal process shall be adopted. The
pneumatic ash removal system has been installed on #1 and #3
boilers and hydraulic ash removal for #2 and #4 boilers. The ash and
slag shall be transported to Yangpogou Ash Yard which is 7km away
from Yangguang at the east by slurry pumps, and the dry ash
collectors are installed.
(2) The boiler slag shall be transported to #3 slag field by vehicles.
(3) The dry ash shall be sold to Shitai High-speed Railway Project,
Concrete Mixing Station of Huatong Group, Yangquan Yamei
Cement Factory, Aerated Concrete Masonry Factory to realize
comprehensive utilization.
(4) The desulfurized gypsum shall be used as the cement additive of
Yangquan Qingshan Cement Co., Ltd. to realize comprehensive use.
Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report & Supplemental EMP for Energy Conservation Rehabilitation Project of #2
Boiler of Yangguang Power Plant
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Table 2.1-4 Compliance of Environmental Monitoring Plan during Operation Period
No. Environmenta
l Factor Monitoring Spot Monitoring Item Monitoring Frequency Contracting Unit Supervisor Compliance or Not
Routine Monitoring by Yangquan Municipal Environment Monitoring Station
1 Waste Gas Chimney (Flue) SO2, Dust and NO2 Once/Quarter, One Day for Once
Yangguang Power
Plant
Yangquan Municipal
Environment Monitoring
Station (EMS)
Compliance
2 Wastewater Reused Water pH, SS, COD, Petroleum,
Fluoride, Sulfide and etc. Once to Twice /Year
Yangquan Municipal
EMS Compliance
3 Noise
1m away from
Factory Boundary
and Office Area
Leq Once/ Half Year, Once at
Daytime and Once at Nighttime
Yangquan Municipal
EMS No
Routine Monitoring by Yangguang Environmental Monitoring Station
1 Waste gas
Chimney (Flue) SO2, Dust and NO2 Continuous monitoring EL3020 CEMS Compliance
Coal yard, coal mill,
coal feeder, belt
conveyor
Coal dust and ash Once/Quarter, 2 days/once,
twice/day
Yangguang Power
Plant Compliance
Implementation according
to requirements described
in Occupational Health
section
2 Wastewater
Drain of ash yard
quality of reuse
water
pH, SS, COD, Petroleum,
Fluoride, Sulfide and etc.
Once/quarter, 2 days/once
Once to twice/month for reuse
water
Implemented, but the
monitoring frequency is
once/year
3 Noise
1m away from
Factory Boundary
and Office Area
Leq Once/ Half Year, Once at
Daytime and Once at Nighttime Compliance
4 Solid waste Plant Area Name, Amount and
Whereabout of Solid Waste Once/Month No
Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report &
Supplemental EMP for Energy Conservation Rehabilitation Project of #2 Boiler of Yangguang Power Plant
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Table 2.1-5 Compliance Evaluation Table of EMP
Phase Compliance Evaluation of EMP
Prephase
In Jan. 2008, Yangguang Power Plant entrusted China Institute for Radiation to
formulate Environmental Management Plan (EMP) for Energy Conservation Rehabilitation Project of Yangguang Power Plant, Environmental Impact
Evaluation for Energy Conservation Rehabilitation Project of Yangguang
Power Plant, and Environmental Auditing Report.
Construction
Period
(1) Yangguang has formulated related pollution prevention and control measures
according to the requirements of EMP.
(2) Yangguang has established the special team to monitor and ensure the
fulfillment of pollution prevention and control measures.
Operation
Period
(1) Yangguang has strictly implemented the EMP rules and guaranteed the
normal operation of environmental management.
(2) Yangguang has carried out the monitoring work according to the
requirements of environmental monitoring plan.
2.1.3 Compliance of Monitoring Plan
2.1.3.1 Monitoring Plan
(1) Monitoring Unit
The routine environmental monitoring plan of Yangguang is carried out by the
Monitoring Station of Yangquan Municipal EPB and Shanxi Provincial
Environmental Monitoring Center; meanwhile, Yangguang has installed the
continuous emission monitoring system on #1 to #4 boilers.
(2) Compliance of Environmental Monitoring Plan during Construction Period
The main purpose of retrofit project is to replace the totals of 22 sets of air sealing for
high-, medium- and low-pressure cylinder and water supply pump. There was almost
no pollution caused by waste gas and wastewater. The retrofit was done inside the
turbine generators set, therefore, the noise impact was slight. After the retrofit, 22 sets
of air sealing were replaced.
The retrofit was done inside the turbine generators set, almost without impact on
ambient air and acoustic environment; hence, the monitoring on ambient air and noise
have not been arranged, and the main monitoring plan included the statistics on name,
amount and whereabout of the solid waste.
(3) Compliance of Environmental Monitoring Plan during Operation Period
a. Continuous Emission Monitoring System
Yangguang has installed 8 sets of continuous emission monitoring systems (CEMS) at
the inlets and outlets of 4 boilers. 2 sets of CEMS for #4 boiler are EL3020 produced
by Beijing Zhongdian Xingye Technology Development Co., Ltd., and has strictly
followed the Continuous Emission Monitoring Rule for Thermal Power Plant
(HJ/T75-2001) to carry out the monitoring.
b. Routine Monitoring by Yangquan Municipal Environmental Monitoring Station
In order to comprehensively monitor the current situation of pollutant emission,
Yangguang has entrusted Yangquan Municipal Environmental Monitoring Station to
Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report &
Supplemental EMP for Energy Conservation Rehabilitation Project of #2 Boiler of Yangguang Power Plant
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launch the monitoring on the waste gas, the effluent of plant wastewater treatment
station (reuse water).
(4) Remaining Issues during Implementation of Environmental Monitoring Plan
The continuous emission monitoring and regular monitoring (once per quarter) have
been arranged for flue gas of 4 boilers, and the scheduled monitoring on wastewater
and reuse water has also been arranged. However, according to the collected
monitoring reports, Yangguang has not carried out monitoring on waste gas at
specified monitoring frequency. The specified monitoring frequency for wastewater is
once per quarter, while the actual frequency is once per year. For the factory boundary
noise, Yangguang has not entrusted Yangquan EMS to carry out once monitoring per
year.
Therefore, there are still remaining issues during the implementation of environmental
monitoring plan. For the monitoring on noise, Yangguang shall arrange the factory
boundary noise at least once per year according to environmental monitoring plan;
and the specified monitoring frequency of wastewater shall be met.
2.1.3.2 Routine Monitoring Result of Pollution Source after Retrofit Project
Yangguang is one of key pollution source monitoring enterprises controlled by the
state. Yangquan Municipal EPB carries out the routine monitoring on the main
pollution sources. This report has collected the routine monitoring files from 2009 to
2011 and has mastered the pollutant emission and standard-meeting information after
the retrofit project.
(1) Routine Monitoring of Boiler Flue Gas
a. Monitoring Spot
The inlets of boiler dust collectors and outlets of desulfurization facilities of 4 boilers.
b. Monitoring Items
Flue Gas, SO2 and NOX
c. Monitoring Frequency
4 times per year (once per quarter), 1 day for once
d. Monitoring Results and Analysis
According to results of continuous emission monitoring and routine monitoring, from
2009 to 2011, the emission concentration of flue gas, SO2 and NOx has met the
maximum permissible emission concentration for coal-fired boilers (Model-W Flame)
during Time Period III stipulated in Emission Standard of Air Pollutants for Thermal
Power Plants (GB13223-2003), namely, Flue gas ≤50mg/Nm3, SO2≤400mg/Nm
3,
NOX≤1100mg/Nm3.
① Continuous Emission Monitoring
The monitoring results statistics on flue gas of 4 boilers during 2009 to 2011 are
shown in Table 2.1-4 below.
Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report &
Supplemental EMP for Energy Conservation Rehabilitation Project of #2 Boiler of Yangguang Power Plant
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Table 2.1-4 Continuous Emission Monitoring Results Statistics on Flue Gas
(2009-2011)
Item
Year Smoke and Dust SO2 NOX
2009 31~48 60~350 500~1050
2010 29~48 120~300 650~1005
2011 27~47 100~300 600~980
② Routine Monitoring on Flue Gas
Table 2.1-5 Boiler Flue Gas Monitoring Results 2009 (mg/Nm3)
Item 1# 2# 3# 4#
Flue
Gas
Concentration
Range 31.4~34.2 31~33.6 31.5~34.2 31.3~31.4
Emission
Standard 50 50 50 50
Meeting
Standard or Not Meeting Meeting Meeting Meeting
SO2
Concentration
Range 58.8~122 58.7~134 64.3~122 65.3~113
Emission
Standard 400 400 400 400
Meeting
Standard or Not Meeting Meeting Meeting Meeting
NOX
Concentration
Range 427~703 489~696 425~703 372~705
Emission
Standard 1100 1100 1100 1100
Meeting
Standard or Not Meeting Meeting Meeting Meeting
Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report &
Supplemental EMP for Energy Conservation Rehabilitation Project of #2 Boiler of Yangguang Power Plant
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Table 2.1-6 Boiler Flue Gas Monitoring Results 2010 (mg/Nm3)
Item 1# 2# 3# 4#
Flue
Gas
Concentration
Range 31.6~32.7 29.7~35.3 31.9~36.5 29.3~36.7
Emission
Standard 50 50 50 50
Meeting
Standard or Not Meeting Meeting Meeting Meeting
SO2
Concentration
Range 129~289 187~290 167~292 121~290
Emission
Standard 400 400 400 400
Meeting
Standard or Not Meeting Meeting Meeting Meeting
NOX
Concentration
Range 332~861 441~821 439~815 431~843
Emission
Standard 1100 1100 1100 1100
Meeting
Standard or Not Meeting Meeting Meeting Meeting
Table 2.1-7 Boiler Flue Gas Monitoring Results 2011 (mg/Nm3)
Item 1# 2# 3# 4#
Flue
Gas
Concentration
Range 27.6~32.0 28~32.9 27.3~32.3 29.0~38.3
Emission
Standard 50 50 50 50
Meeting
Standard or Not Meeting Meeting Meeting Meeting
SO2
Concentration
Range 222~277 105~232 116~268 193~232
Emission
Standard 400 400 400 400
Meeting
Standard or Not Meeting Meeting Meeting Meeting
NOX
Concentration
Range 207~894 209~1060 213~783 215~796
Emission
Standard 1100 1100 1100 1100
Meeting
Standard or Not Meeting Meeting Meeting Meeting
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(2) Routine Monitoring of Wastewater
a. Monitoring Spot
Outlet of wastewater treatment station and drain of wastewater
b. Monitoring Items
PH, NH3-N, CODcr, Volatile Phenol, Sulfide, Petroleum and SS
c. Monitoring Frequency
Once per year and one day for once
d. Monitoring Results and Analysis
In accordance with the monitoring results during 2nd
Quarter and 4th
Quarter provided
by Yangquan Municipal Environmental Monitoring Station, all of wastewater has
been reused.
Table 3.2-1 Routine Monitoring Results of Wastewater
Date of
Monitoring
Monitoring
Spot Pollutant
Wastewater
Volume
(m3/d)
Concentration
(mg/L) Meeting
Standard
or Not
Remark
Inlet Outlet Inlet Outlet
2nd Q
uarter o
f 20
09
May
26
Outlet of
Wastewater
Treatment
Station
pH
470 470
7.77 Yes
Reuse
NH3-N 4.22 Yes
CODcr 61.6 53.2 Yes
Volatile
Phenol 0.004 Yes
Sulfide 0.005L Yes
Petroluem 0.1L Yes
SS 53 Yes
General
Drain of
Wastewater
pH
4800
8.09 Yes
No
Draining
Outside
NH3-N 0.221 Yes
CODcr 116 Yes
Volatile
Phenol 0.006 Yes
Sulfide 0.005L Yes
Petroluem 0.8 Yes
SS 47 Yes
4th Q
uarter o
f 20
10
Outlet of
Wastewater
Treatment
Station
pH
71
7.82 Yes
Reuse
CODcr 10.3 7.7 Yes
Volatile
Phenol 0.0028 Yes
Sulfide 0.005L Yes
Petroluem 0.1L Yes
SS 29 Yes
pH
4900
7.38 Yes
No
Draining
Outside
CODcr 8.4 Yes
Volatile
Phenol 0.0026 Yes
Sulfide 0.005L Yes
Petroluem 0.1L Yes
SS 135 Yes
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2.2 Implementation of EAR
As described in the original environmental auditing report, Yangguang could further
improve its environmental protection measures through flue gas denitrification and
enhancement of fly ash utilization rate. The compliance of EAR is shown in Table
2.2-1.
2.3 Sum
To sum up, the completed rehabilitation project has brought outstanding effect of
energy conservation and emission reduction, and is favorable for the improvement of
local environmental quality; meanwhile, Yangguang has adopted environmental risk
mitigation measures and has basically followed EMP and Environmental Monitoring
Plan, and has conducted the routine monitoring on pollution source, so that the
emission standards have been met. However, the monitoring on factory boundary
noise shall be arranged at least once per year and the specified monitoring frequency
on wastewater shall be met.
Yangguang has fulfilled the proposed environmental protection measures specified in
EAR; in addition, Yangguang shall further develop the fly ash market so as to
improve its utilization efficiency.
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Table 2.2-1 Implementation Status of Suggested Environmental Protection Measures in Original EAR
Item Environmental Protection Measures Suggested in Original EAR Implementation Status
Flue Gas
Denitrification
The W-Model flame is adopted by Yangguang, with high furnace temperature and large NOx
emission. In spite that the NOx emission concentration could meet the requirement specified in
Emission Standard of Air Pollutants for Thermal Power Plants (GB13223-2003), in order to
further improve the local environmental quality, Yangguang shall adopt related measures to
reduce NOx emission.
Solution: Yangguang has established the independent Denitrification Project Dept. to collect
information on the denitrification measures and prophase investigation.
So far, Yangguang has completed the bidding of SCR rehabilitation
project for denitration of 4 generating units. The denitration retrofit
project of #3 generating unit will be completed in July 2012 and by
October 2013, the denitration retrofit projects for all of 4
generating units will be completed. The denitration process adopts
low NOx combustor + selective catalytic reduction (SCR). After
denitration, the NOx emission concentration will be lower than
170mg/Nm3.
Enhancement of Fly
Ash Utilization Rate
The comprehensive utilization rate of fly ash in Yangguang is about 25% and there are large
amount of fly ashes and slag have not been used.
Solution: In order to further enhance the utilization rate of fly ash, the following measures shall
be taken: (1) The dry ash collection system shall be installed on #1 boiler to enhance the output
of fly ash product; (2) Based on the special railway transport line of Yangguang, the market in
Beijing shall be further developed; it is planning to build a 500m3 ash storage along the railway
line; (3) It is planning to build a 150,000m3/a aerated concrete masonry production line. After
the aforesaid projects are completed, the comprehensive utilization rate of fly ash will exceed
75%.
In order to further enhance the utilization rate of fly ash,
Yangguang has installed pneumatic ash handling system on #1 and
#2 generating units, which has substantially reduced the water
consumption and promoted the comprehensive utilization of fly
ash; meanwhile, Yangguang has cooperated with Huatong Group
to build a 150,000m3/a aerated concrete masonry production line.
So far, the comprehensive utilization rate of fly ash has exceeded
60%.
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3. Denitration, Demercuration and Proposed Environmental
Protection Measures during Recent Period
3.1 NOx Pollution Prevention and Control
During “12th
FYP”, China will further promote the energy conservation and emission
reduction and control the total amount of SO2 emission, and the NOx emission
control will be also involved; therefore, in addition to desulfurization, there will be a
new round of control of denitration; on the other side, in the Emission Standard of Air
Pollutants for Thermal Power Plants, the emission standard of NOx shall be lower
than 200mg/Nm3 (W-model flame) from July 1
st, 2014.
In Shanxi, during “12th
FYP”, all of thermal power plants shall installed low NOx
combustors and denitration facilities; therefore, Yangguang is planning to conduct
flue gas denitration rehabilitation for 4 generating units so as to further improve local
environmental quality.
In accordance with NOx emission standard and rehabilitation schedule, Yangguang
has completed the bidding of SCR rehabilitation project for denitration of 4
generating units. The denitration rehabilitation project of #3 and #2 generating units
will be completed in July and December 2012 respectively. The rehabilitation work
for the other 2 generating units will be completed in April and October 2013
respectively.
For denitration process, inside the furnace, the low NOx combustor is proposed;
outside the furnace, the selective catalytic reduction (SCR) process is proposed. The
designed NOx concentration at inlet is 1000mg/Nm3, 100% of flue gas will be
handled and the final NOx concentration will be lowered to170mg/Nm3 .
3.2 Heavy Metal (Mercury) Pollution Prevention and Control
The Emission Standard of Air Pollutants for Thermal Power Plants (GB13223-2003),
a regulation currently in force in China, does not set an emission limit for mercury.
However, a revised version of Emission Standard of Air Pollutants for Thermal
Power Plants (GB13223-2011) has introduced a limit on the release of mercury and
associated compounds from Jan. 1st, 2015.
It is known from the Emission Standard of Air Pollutants for Thermal Power Plants
(GB13223-2011) that the coal-fired power plants operating in China apply no specific
techniques or facilities to remove mercury, although a synergistic control may be
achieved through dedusting, desulphurization and denitration.
At present, Yangguang adopts electric fabric dust collectors and wet limestone
scrubbers to produce the synergistic effect of demercuration. The EU’s Reference
Document on Best Available Techniques for Large Combustion Plants recommends a
combined application of high performance dedusting devices, fuel gas
desulphurization (FGD) and denitration techniques for Hg removal, and states that for
electrostatic precipitator (ESPs) or fabric filter (FFs) operated in combination with
FGD techniques, an average removal rate of Hg is 75% (50 % in ESP and 50% in
FGD) and 90% in the additional presence of a high dust SCR can be obtained.
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Hence, Yangguang can achieve a 75% Hg removal rate with its existing fuel gas
treatment facilities, and a rate of 90% in combination after the construction of fuel gas
denitration facilities is completed.
3.3 Proposed Environmental Protection Measures
With the higher and higher requirements on environmental protection and the
development of environmental protection technologies, from 2012 to 2013,
Yangguang proposes to invest 489 million RMB to carry out retrofit, update and
improve the original environmental protection facilities so as to substantially reduce
the pollutant emission and make more contributions to local environmental quality
improvement. The proposed environmental protection projects are shown in Table
3.3-1.
Table 3.3-1 Proposed Environmental Protection Projects from 2012 to 2013
No. Name of Project Estimate Date of
Completion
Investment
(10,000 RMB) Effect
1 Wastewater Treatment and
Reuse Project End of 2012 4500
Reduce the wastewater
discharge and the consumption
of fresh water
2 Denitration Project for 4
Generating Units October 2013 36000 Reduce the emission of NOx
3
Installation of Bag-type Dust
Removers on #1 and #3
Generating Units
End of 2012 4400 Reduce the emission of smoke
and dust
4
Capacity Enlargement Project
of Desulfurization Systems
for 4 Generating Units
End of 2013 4000 Reduce the emission of SO2
Total 48900
3.3.1 Wastewater Treatment and Reuse Project
Due to the rehabilitation of dust removal system and the comprehensive utilization of
fly ash and slag, there are large amount of wastewater to be reclaimed and treated;
therefore, Yangguang has actively promoted the comprehensive utilization of
wastewater. So far, the feasibility study report has been prepared and Yangguang is
ready for bidding. It is estimated that the project be started in April 2012 and
completed in the end of 2012. The total investment is 45 million RMB. After the
project is completed, about 5,000 tons of industrial water shall be saved per day, 1.5
million tons per year.
3.3.2 Denitration Project for 4 Generating Units
So far, Yangguang has completed the bidding of SCR rehabilitation project for
denitration of 4 generating units. The denitration rehabilitation project of #3 and #2
generating units will be completed in July and December 2012 respectively. The
rehabilitation work for the other 2 generating units will be completed in April and
October 2013 respectively. The total investment is 360 million RMB. For denitration
process, inside the furnace, the low NOx combustor is proposed; outside the furnace,
the selective catalytic reduction (SCR) process is proposed. The designed NOx
concentration at inlet is 1000mg/Nm3, 100% of flue gas will be handled and the final
NOx concentration will be lowered to170mg/Nm3 .
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3.3.3 Installation of Bag-type Dust Removers on #1 and #3 Generating Units
In order to further reduce the dust emission, Yangguang proposes to invest 44 million
RMB to install the bag-type dust removers on #1 and #3 units, which will be
completed in the end of 2012. After the project is completed, the dust removal
efficiency will be increased to 99.97% from 99% and the smoke and dust emission
concentration will be lower than 30mg/Nm3.
3.3.4 Capacity Enlargement Project of Desulfurization Systems for 4 Generating
Units
In order to improve the stability of desulfurization systems and ensure the qualified
emission of SO2, Yangguang proposes to invest 40 million RMB to carry out capacity
enlargement of desulfurization systems. So far, the desulfurization system of #4
generating unit has been completed and is under 168-hour commissioning. Based on
the information of commissioning, the desulfurization efficiency has been increased
to over 98% from 95%. The capacity enlargement projects for #1, #2 and #3 units
shall be carried out during the overhaul period.
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4. Occupational Health and Safety
4.1 Occupational Health Rules
In order to prevent, control and eliminate occupational hazards, improve occupational
disease prevention, protect the health of workers and their legitimate rights and
interests, and promote coordinated economic and social development, according to
Law of the Peoples Republic of China on Prevention and Control of Occupational
Diseases, Yangguang has developed Occupational Disease Prevention and Control
Plan. Related management system also includes Health Monitoring and Management
System, Emergency Response and First Aid Plan for Occupational Disease Accidents
and Routine Monitoring and Periodical Testing Rules for Hazard Factors of
Occupational Disease.
Yangguang has established Production Safety Committee headed by General Manager,
and Labor Protection, Supervision and Inspection Committee headed by the Chairman
of Labor Union. Yangguang also established a company-wide safety network; HSE
Department exercises the functions of labor safety and occupational health
management and supervision, in addition to the assistance of Safety Supervision Dept.
and the Supervision of Labor Union, a complete labor safety and occupational health
management system has been established.
4.2 Occupational health management plan
According to relevant requirements for working conditions and safety set forth in the
Environmental, Health, and Safety Guidelines for Thermal Power Plants (EHS
Guidelines) and General Environmental, Health, and Safety Guidelines (General EHS
Guidelines), attention should be paid mainly to the factors affecting occupational
health and safety of employees of operating thermal power plants, including
non-ionization radiation, heat, noise, confined space, electricity hazards, fire and
explosion potentials, chemical hazards and dust. The occupational health management
plan of Yangguang addresses the above factors one by one as follows:
4.2.1 Non-ionization radiation
Since the employees of power plant work close to generators, power transmission or
transformation equipment and high voltage power lines, their exposure to
electromagnetic field is higher than usual.
Yangguang has four main transformers and all of them are 220KV. Safety fences have
been set up as required to delineate a protection area and prevent unauthorized access
of irrelevant people. All persons authorized to enter the site must be trained and work
in compliance with the “two-ticket” requirement (i.e. work ticket and operation
ticket).
4.2.2 Heat
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Yangguang has formulated Safety Measures on Burning Prevention for Employees
Working with High-Temperature Equipment to prevent scald. The work ticket system
must be followed by the workers when handling high-temperature equipment, that is,
no work shall be started until written approval has been obtained respectively from
the workplace supervisor, the operation team leader and the safety guard on duty.
Besides, the high-temperature, high-voltage equipment maintenance guidelines must
be strictly observed.
(1) In case of heated but unpressurized devices (such as deaerator,
high/low-temperature heater, shaft seal heater, flash vessel, temperature/pressure
reducer and condenser), the temperature inside the device must be lowered down to
normal level, at maximum not exceeding 20% of the upper limit, to prevent burning.
In emergency, workers may take turns to work and rest (do a shift) if conditions are
tolerable.
(2)In the event of dismantling high temperature objects like bolts on the mating face
of cylinder, gloves and other PPE intended for burning prevention shall be worn to
avoid direct contact with human skin.
(3) For equipment above normal temperature, ventilation shall be reinforced for
cooling purpose and men shall not contact or stay in the equipment for a long time.
(4) Working with high-temperature equipment shall be under supervision to ensure
safety and provide first aid in case of burning.
4.2.3 Noise
In thermal power plant, there is a comprehensive source of noise, including a variety
of fans, water pumps, coal crushers, turbine-generator sets, boilers, etc. The existing
noise-proof measures include:
(1) Long-distance operation in a silence cabinet where noise is concentrated;
(2) Sound muffler installed at the inlet of forced draft fan or air compressor;
(3) High performance muffler installed at the outlet of boiler valves;
(4) Acoustic enclosure with inner absorbing sheet to reduce noise from
turbine-generator sets;
Signboards in High Temperature
Workplace in Yangguang
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(5) Keeping airflow rate far below the upper limit and using specialized heat
insulation materials to reduce the noise from fast-flowing air current in the
high-temperature and high-pressure steam pipes;
(6) Proper design and reasonable layout of fuel gas pipes to ensure smooth flow and
reduce pneumatic noise;
(7) Circular corridors around centralized control room, with sound-proof doors,
windows and walls to insulate against noise;
(8) Separate duty rooms with appropriate sound insulation;
(9) Earplugs provided for workers exposed to noise as PPE.
4.2.4 Confined Space
Yangguang carries out the management in accordance with the provisions of Working
in Containers specified in Working Safety Regulation of State Grid Company
(Thermal Power Plants).
(1) Before maintenance inside the boilers, the blind plates shall be installed to isolate
the connections with steam bus pipe, water supply bus pipe and emission bus pipe and
then the safety signs shall be hung. The power supply or air supply of electric and
pneumatic valves shall be cut off and the safety signs shall be hung.
(2) Before inspection, cleaning and maintenance inside the containers and tanks, the
operators shall obtain the operation ticket firstly. During work, the ventilation shall be
ensured; however, the oxygen supply shall be prohibited.
(3) In case of hazardous gases or residue that is possible to generate hazardous gases
existing inside the containers or tanks, the operators shall start their work after clear
all of hazardous gases or residues.
(4) For the operators who work in the containers or tanks, they shall carefully read the
attentions firstly. There shall be at least 2 operators and one of them shall stay outside
for monitoring.
(5) Before closing the manhole of containers or tanks, the chief person shall count the
operators and tools and ensure that there is no operator or tool left inside.
4.2.5 Electric hazard
Yangguang carries out the management in accordance with the provisions of
Substation and Electric specified in Working Safety Regulation of State Grid
Company.
(1) Power Generation Safe Practices and Supplementary Regulations on the Work
Ticket and Operation Ticket System for Electricity and Circuit shall be obeyed in a
rigorous way. Exams shall be held regularly with regard to the above practices and
regulations, while the results shall be used as one of parameters for promotion.
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(2) The work shift system shall be followed strictly; supervisors or unit leaders shall
give their instruction in a clear, definite and standardized way, while operators shall
have a thorough understanding about the task and be familiar with the current
working mode of system.
(3) Under the operation supervision system, switching a system from one mode to
another requires two operators, and such operation shall never be conducted without
supervision.
(4) During operation process, no step shall be omitted, added and skipped, and under
no circumstance, several steps can be operated at the same time. In case of any
problem, the worker shall discontinue operation, instead of changing operation ticket
without authorization, until the reasons are identified; then, the operation ticket may
be rewritten as necessary.
(5) The error-proof block management shall be reinforced in strict adherence to
Error-Proof Block Management Regulations; the error-proof blocking devices shall
be regularly inspected and serviced to ensure these devices are 100% in a good
working condition.•
(6) Work group training management shall be strengthened by periodical on-the-post
training and accident prevention rehearsal. By virtue of these trainings, the workers on
various posts will improve their capacity for evaluating, analyzing and handling
accidents and enhance their technical level.
(7) For the purpose of switching operation, the workers shall wear helmet, insulating
gloves and other safety equipment as appropriate, and safety measures shall be fully
adopted to satisfy relevant requirements stipulated in safety regulations.
(8) Under the “safety foremost, prevention oriented” policy, safety training shall be
conducted diligently, exams on safety regulations and “two-ticket” system shall be
held annually and the workers who fail the exams are prohibited from operation.
4.2.6 Fire and explosion hazards
Yangguang has formulated Safety Standard for Working in Coal Dust Places,
Countermeasures against Hydrogen Fire or Explosion of Hydrogen-Cooled
Generator, and Fuel System Fire Protection Rules.
Working inside fuel tank (container), acid/alkali tank (container), coal mill chamber
and pulverizing cylinder, coal powder bin, chlorination room, ammonification room,
covered gutters, ditches and other places having insufficient oxygen and combustible,
explosive or poisonous hazards are especially dangerous in the sense that serious
accidents, like suffocation, intoxication, explosion and fire, may occur for lack of
proper safety measures.
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4.2.7 Hazardous Chemicals
The places where harmful substances are stored or fed are the main source of
poisonous hazard. Such substances include CO, SO2, NOX, ammonia, hydrochloric
acid, NaOH and so forth. The existing poison-proof measures include:
(1) Mechanical approaches and automation are preferred when designing the
production process and facilities for poisonous materials. Besides, the workplace
should be closed, direct operation should be avoided and ventilation measures should
be taken where the production process allows.
(2) Ammonia and hydrazine warehouse, ammonia and hydrazine room and laboratory
should be naturally ventilated.
(3) Acid and alkali warehouse, bump house, measurement room and battery room
should be naturally ventilated.
(4) During maintenance or auxiliary production, workplaces shall be provided with
protection measures and ventilation to reduce worker exposure to hazards. Gas mask
and other protection equipment shall be provided for certain posts, and
special-purpose protection apparatus provided for workers exposed to strong acid or
alkali.
4.2.8 Dust
Coal transportation, storage, feeding and pulverization processes, in addition to the
dedusting system, are the main source of dust hazard. The existing dust-proof
measures include:
(1) On the coal yard, water sprayer should be installed every several meters to
sprinkle water for several times a day; meanwhile, green belts should be enlarged to
mitigate coal dust pollution.
(2) Atomizer should be added on the portal-type rotary-wheel stacker-reclaimer,
sprinkling at a rate of 5-6m3/h for each machine.
(3) The original bunker of the silo should be provided with a gravity baffle plate and
the impeller coal feeder should be fitted with a dust precipitator.
Signboards in Combustible and Explosive
Workplace
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(4) The coal pulverizer room and different operation stations should be provided with
a cushion flap valve, enclosure devices, and dust collection system; belts and floors
should be provided with water flushing devices so as to clean the floor off dust.
(5) Duty rooms of coal transport system should be equipped with dust and sound
insulation devices; also inspection patrol practice should be maintained.
(6) Stray dust in the boiler room and on the belts of the coal bunker bay should be
cleaned using vacuum dust collection system.
(7) The operation level and the bottom level of boiler, ash slurry pump house, each
operation station, coal pulverizer room, and coal bunker should be provided with
hydraulic sweeping devices so as to prevent secondary flying dust.
(8) Before service and maintenance, the pulverizing system and the dry ash system
should be cleared of all the residual ash or be flushed clean using water.
(9) Coal bunker interchange stations should be provided with water-activated dust
collector; the original bunkers in the coal bunker bay were provided with bag filter.
(10) Workers exposed to dust should be equipped with dust respirator, dust-proof
overall, and gloves.
4.2.9 Field rescue of occupational diseases
Certain occupational diseases are prone to acute attack, for instance acute chemical
poisoning, such as cyanides, hydrogen sulfide, carbon monoxide, chlorine, and
ammonia, and as well as chemical burns; also, heat stroke should be minded. Field
rescue shall be done properly, because this is critical to life saving and curing
timeliness and is also an important step for preventing illness worsening and for
promoting earlier recovery.
Victims of acute poisoning shall be first of all removed from the site, be kept calm
and warm. If the clothes are contaminated by poisonous substance, they shall be
replaced instantly and the skin be cleaned. In case of respiratory arrest, artificial
breathing shall be given promptly. For certain acute poisoning cases, the clinic
professionals shall administer antidotes in early stage. For instance, isoamyl nitrite
inhalation, sodium thiosulfate and sodium nitriate intravenous injection may be
administered for acute cyanide poisoning; methylene blue intravenous injection may
Signboards in Dust and Coal Dust Workplace
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be administered for acute aniline or nitrobenzene poisoning; pyraloxime iodide or
phosphorus chloride injection may be given for acute organic phosphorus pesticide
poisoning.
Acute poisoning of several persons need to be handled in time and with care even
more. Emergency rescue plan for acute occupational poisoning should be in place. A
command system shall be set up immediately after the occurrence of emergencies,
and light or serious cases should be screened and taken care of separately; accident
management and reporting to competent authorities shall be done properly.
Victims of chemical burn shall have their parts cleaned by clean water immediately
on site. Heat stroke victims shall be removed from heat sources to a well ventilated
place and then have the body rubbed by cool water and shall drink saliferous
refrigerant beverage. Medical professionals shall be sent for or the victims shall be
transferred to a clinic institution for emergency treatment while preliminary treatment
is being given.
4.3 Implementation and Corrective Measures Concerning
Occupational Sanitation Control
In spite of the general satisfaction of requirements in the World Bank’s
Environmental, Health, and Safety Guidelines for Thermal Power Plants (EHS
Guidelines) and General Environmental, Health, and Safety Guidelines (General EHS
Guidelines) in respect of 8 aspects of occupational health and safety for thermal
power plant at operating stage, Yangguang still needs continuous improvement,
mainly in the following area.
(1) Signboards need to be set up in non-ionization radiation places (close to
generators, power transmission and transformation facilities and high-voltage power
lines); areas where the electromagnetic radiation dose is below a specified level need
to be defined as safe places; or otherwise, as unsafe places; exposure to unsafe places
need to be prevented or reduced wherever possible; and the workers in such places
need to be properly protected and have physical examinations at regular intervals.
(2) Fire and explosion control measures need to be perfected in coal dust
concentrated areas. For example, vehicle stop and travel regulations should be
formulated to minimize the risk of explosion caused by suspending high-temperature
pulverized coal during traveling period. Besides, workplaces should be cleaned
periodically to prevent coal dust accumulation.
4.4 Sum
In combination with the characteristic of occupational health in thermal power plants,
and targeting various unsafe and unhealthy factors those affecting the workers’ safety
and health, Yangguang has actively taken various precautions, and has improved its
normalized management, engineering control, staff education and training, medical
care, individual protection and dust monitoring so that the workers’ safety and health
have been effectively guaranteed.
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5. Environmental Risk Mitigation Measures and EMP for
Rehabilitation Project of #2 Boiler
5.1 Profile of High-voltage Variable Frequency Speed Control
System Project of #2 Boiler
The project mainly includes construction of frequency conversion control system
(40m2), installation of frequency conversion equipment and electric circuit retrofit of
fans.
5.1.1 Newly Increased Equipment
The newly increased equipment is shown in Table 5.1-1.
Table 5.1-1 Equipment List
No. Name Quantity (Set)
1 High Voltage Frequency Converter 2
2 High Voltage Switchgear 4
3 Heat Exchanger 2
4 Axial Flow Fan 380VAC 2
5 Synchronous Power Supply Switch Device 2
5.1.2 Technical Parameters of Frequency Converter
Table 5.1-2 Technical Parameters of Frequency Converter
No. Name Parameter
1 Capacity (KVA) 1400
2 Power of Adaptable Motor (KW) 1400
3 Input Frequency (Hz) 45~55
4 Rated Input Voltage (V) 6000V+5%/-10%
5 Factor of Input Power 0.95(>20% Load)
6 Efficiency Under Rated Load: >0.96
7 Output Frequency (Hz) 0~50
8 Definition of Output Frequency
(Hz) 0.01
9 Overload Capacity 120% Per Minute; 150% Protection
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Activated
10 Input Analog 0~10V/4~20mA, Setting
Available
11 Output Analog 0~10V/4~20mA Optional
12 Acceleration or Deceleration (s) 0.1~3000
5.1.3 Effect Analysis
According to analysis and calculation, after retrofit, 30% of power consumption can
be saved (annual power consumption is about 12 million KWh); therefore, about 3.6
million KWh of power can be saved annually, accounting for 0.045% of auxiliary
power consumption; meanwhile, about 0.195g/kwh of coal consumption can be
lowered and annually about 1,560 tons of coal equivalent can be saved.
5.2 Environmental Risk Mitigation Measures during Construction
Period, EMP and Environmental Impact Analysis
5.2.1 Environmental Risk Mitigation Measures during Construction Period
Environmental Risk Mitigation Measures: Only a brick-concrete structure frequency
conversion control room (40m2) will be built, with small engineering amount;
therefore, the output of dust, wastewater, noise and construction waste are small. In
order to further mitigate the construction pollution, during the construction period, the
building material management shall be strengthened to reduce the dust output; the
construction wastewater shall be reused for agitation; the rational construction method
shall be adopted to reduce the noise; the small amount of construction waste shall be
disposed of together with domestic refuse of Yangguang.
Contractor: Project Contractor
Supervisor: Yangguang Power Plant and Yangquan Municipal Environmental
Protection Bureau
5.2.2 EMP during Construction Period
During construction period, the special environmental management unit shall be
established to ensure the implementation of EMP. The detailed EMP includes:
(1) Ambient Air Quality Control
a. The civilized construction shall be done during construction, and the dust
prevention measures shall be taken, e.g. surrounding plants/walls, water spray, and
coverage of transport vehicles.
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b. Regular checks shall be performed to working site.
c. The administrative and the economic penalty shall be applied to the violators of
operation procedures and those failing to take corrective actions for the wrong
activities in the construction.
(2) Noise Control
a. The advanced low-noise constructing process will be used to replace the high-noise
process.
b. The construction schedule will be reasonably arranged to avoid of disturbance to
the surrounding residence.
(3) Water Environmental Control
During the construction period, the wastewater is mainly from the domestic sewage
from the construction workers and small of amount of wastewater from construction
activities. The construction workers will all live in the dormitory, and the domestic
sewage will be discharged to domestic sewage treatment plant. The small amount of
wastewater from construction activities mainly contains suspended particulates, which
will be reused for mixing construction materials after sedimentation.
(4) Solid Waste Disposal Control
The solid waste of construction materials will be disposed collectively according the
stipulations of the local authorities. The domestic solid wastes from the construction
workers, Yangguang employees’ waste, will be collected by the local garbage
services for sanitary landfill.
(5) Ecological Environment Control
The proposed project will be performed within the existing area of Yangguang. The
construction area is in a limited area without new land acquisition, involving no
ecological problems.
(6) Social Environment Safeguard
This Project call for neither new land acquisition nor resettlement, thus without
negative effects on social environment.
5.2.3 Environmental Impact Analysis during Construction Period
(1) Ambient Air Impact
A brick-concrete structure frequency conversion control room (40m2) will be built,
and small amount of dust will be produced. Due to small engineering amount, the
amount of dust is very small.
The construction management shall be strengthened during the construction. The
transport vehicles shall be covered with canopies or other anti-drop measures shall be
taken. The building material shall be rationally piled; if necessary, the enclosure shall
be established to reduce the dust emission.
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After the aforesaid measures are taken, the small amount of dust shall not bring
negative impact to surrounding environment.
(2) Water Environment Impact
a. Construction Wastewater
A brick-concrete structure frequency conversion control room (40m2) will be built,
and small construction wastewater will be produced. Due to small amount of
engineering amount, the amount of wastewater shall be very small. After settlement of
sediment, the wastewater shall be reused to mix the construction material.
After the aforesaid measures are taken, the small amount of construction wastewater
shall not bring negative impact to surface water.
b. Domestic Sewage
The construction workers will stay at the staff dormitory of Yangguang, whose
domestic sewage will be collected by existing sewage treatment facilities and reused.
(3) Acoustic Environment Impact
A brick-concrete structure frequency conversion control room (40m2) will be built,
with the noise at 60~80B(A) brought by construction machineries.
The low-noise equipment shall be adopted and rational construction shall be arranged
so as to reduce the noise emission. In addition, the proposed project will be
implemented within the plant, without any impact to surrounding residents.
(4) Solid Waste Impact
A brick-concrete structure frequency conversion control room (40m2) will be built,
and only small amount of construction waste will be produced.
The construction waste shall be disposed of together with domestic refuse of
Yangguang, without any negative impact to surrounding environment.
To sum up, the proposed retrofit project is with small amount of engineering amount
and will be implemented within the existing plant, with slight impact to surrounding
environment. Such impact is short and reversible, mainly reflected in part of plant
area; therefore, the proposed project will not bring obvious negative impact to
surrounding environment.
The environmental risk mitigation measures and environmental monitoring plan
during the construction period are shown in Table 5.2-1 and 5.2-2.
5.3 Environmental Risk Mitigation Measures and EMP during
Operation Period
After the proposed retrofit project is completed, the environmental risk mitigation
measures and EMP during operation period is shown in Table 5.3-1. In accordance
with specified environmental monitoring requirements in EHS and in combination
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with original environmental monitoring plan, the environmental monitoring plan
during the operation period are is formulated and shown in Table 5.3-2.
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Table 5.2-1 Main Environmental Impact and Mitigation Measures during Construction Period of High-voltage Variable Frequency
Speed Control System Project of #2 Boiler
Period Environmental
Factors Main Environmental Impact Proposed Mitigation Measures Implementing Unit Supervisor
Co
nstru
ction P
eriod
Ambient Air
A small amount of fly dust will be
produced during construction
period.
There was small amount of fly dust and
the construction management shall be
enhanced.
Contractor Yangguang Power Plant &
Yangquan Municipal EPB
Water Small amount of construction
wastewater will be produced.
The construction wastewater shall be
reused for mixing after sedimentation.
Sound The noise at 60 ~ 70B(A) was
produced.
The low noise equipment shall be
selected.
Solid Waste Small amount of construction waste
will be produced.
The construction waste shall be
disposed of together with domestic
garbage.
Table 5.2-2 Compliance of Environmental Monitoring Plan during Construction Period of High-voltage Variable Frequency Speed
Control System Project of #2 Boiler
No. Environmental
Factors Monitoring Spot Monitoring Item Monitoring Frequency Owner
Monitoring and
Supervision
Unit
Budget
(10,000RMB/
year)
1 Ambient Air Peripheral of construction
site and office area TSP
Once during construction
period
Yangguang
Yangguang
Environmental
Monitoring
Station
1.5
2 Noise
1m away from boundaries of
construction site and
Yangguang
Leq Once at daytime and
nighttime respectively 0.5
3 Solid Waste Construction Site
Name, amount and
whereabout of solid
waste
Once per month 0.5
Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report & Supplemental EMP for Energy Conservation Rehabilitation Project of #2
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Table 5.3-1 Environmental Risk Mitigation Measures and Environmental Monitoring Plan during Operation Period
Stage
Environ
mental
Factors
Item Major Environmental
Impacts Mitigation Measures
Proposed Mitigation
Measures Contractor Supervisor
Op
eration
Perio
d
Ambient
Air
Boiler
Flue Gas
Major pollutants SO2, dust,
NO2 contained in flue gas
emitted from coal-fired
boiler
(1) #1 and #3 boilers are equipped with electrostatic precipitators,
with dust removal efficiency of over 99.9%; #2 and #4 boilers are
equipped with bag-type precipitators, with dust removal efficiency of
over 99.9%; dust emission concentration <30mg/m3.
(2) Limestone-gypsum wet desulfurization process is adopted, with
desulfurization efficiency of over 90%, SO2 emission concentration
≤400mg/m3.
(3) NOx emission concentration ≤100mg/m3
(4) Flue gas on-line monitoring device is installed so as to facilitate
supervision and management of exhaust gas pollution source and to
reduce air pollution.
(1) Installation of
Bag-type Dust
Removers on #1 and #3
Generating Units
(2) Capacity
Enlargement Project of
Desulfurization
Systems for 4
Generating Units
(3) Denitration Project
for 4 Generating Units
Yangguang
Power
Plant
Yangquan
Municipal
EPB
Coal
(Powder)
Dust
Unorganized emission of
dust during the storage and
transportation of coal, ash
and slag
(1) Transport vehicles shall be covered with canopies.
(2) Wind-shield and dust-suppression walls are built around the coal
fields, and water-spraying facilities are provided. Such measures can
reduce the dust at coal field by more than 70%.
(3) The belt room of coal transmission room and coal scuttle of coal
storage room are installed with bag filter to remove the dust.
(4) The coal handling gallery adopts the belt conveyor for closed
transportation.
—
Water
Environ
ment
Waste
water
Production wastewater
mainly includes: circulation
cooling water, wastewater
from reverse osmosis water
treatment system,
acid/alkali-containing
wastewater generated from
preparation of chemical
demineralized water,
domestic sewage, flue gas
desulfurization wastewater,
coal handling system,
wastewater from coal yard,
etc.
(1) Industrial wastewater mainly includes: recycled acid-alkaline
wastewater from chemical water treatment system, backwash
wastewater from filter and reverse osmosis device, resin-containing
wastewater from condensate fine treatment system, wastewater from
boiler cleaning, flushing water of main workshop. The wastewater
drained from the industrial production system enters the industrial
wastewater treatment system to filter the big suspended solids. After
precipitation, the wastewater enters purifying pool before it is used in
coal handling system, spraying coal yard or ash flushing.
(2) The wastewater treatment system is installed which is mainly
used to collect and dispose of the flushing and dedusting water from
coal handling gallery. After precipitation and filter, it can be used
repeatedly.
(3) The desulfurization wastewater, after treated, can be used for dry
ash humidification.
(4) Domestic wastewater, after treated by domestic wastewater
treatment system, is pumped into recovery tank and for dust removal.
Wastewater Treatment
and Reuse Project
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With the implementation of aforesaid measures, wastewater is totally
utilized in a comprehensive way, and there is no other wastewater
drained outside. Op
eration
Perio
d
Acoustic
Environ
ment
Noise
The noise level of boiler
draught fan, blower, coal
mill, feed pump, steam
turbine, generator and exciter
is generally between 90 ~
100dB (A)
A variety of measures such as noise elimination, sound insulation,
vibration attenuation, etc., are taken to ensure that within the
western, southern and eastern boundary of Yangguang, the noise
emission can meet Category-II standard as defined in Noise Standard
within Boundary of Industrial Site (GB12348-90); and at the
northern boundary the noise emission can meet Category-IV
standard of GB12348-90.
Yangguang
Power
Plant
Yangquan
Municipal
EPB
Solid
Waste Slag
Major solid wastes include
pulverized fly ash, slag and
desulfurization gypsum
(1) The separate ash and slag removal process is adopted. The
pneumatic ash removal system has been installed on #1 and #3
boilers and hydraulic ash removal for #2 and #4 boilers. The ash and
slag are transported to Yangpogou Ash Yard which is 7km away
from Yangguang at the east by slurry pumps, and the dry ash
collectors are installed.
(2) The dry ash are sold to Shitai High-speed Railway Project,
Concrete Mixing Station of Huatong Group, Yangquan Yamei
Cement Factory, Aerated Concrete Masonry Factory to realize
comprehensive utilization.
(3) The desulfurized gypsum is used as the cement additive of
Yangquan Qingshan Cement Co., Ltd. to realize comprehensive use.
Table 5.3-2 Environmental Monitoring Plan during Operation Period
No. Environmental
Factor Monitoring Spot Monitoring Item Monitoring Frequency Contracting Unit Supervisor
Budget
(10,000RMB/year)
Routine Monitoring by Yangquan Municipal Environment Monitoring Station
1 Waste Gas Chimney (Flue) SO2, Dust and NO2 4 Times /Quarter, One Day for
Once
Yangguang Power
Plant
Yangquan Municipal
Environment Monitoring
Station (EMS) and EPB
10.0
2 Noise 1m away from
Factory Boundary Leq
Once/ Year, Once at Daytime
and Once at Nighttime 0.5
3 Wastewater Reused Water pH, SS, COD, Petroleum,
Fluoride, Sulfide and etc. Once to Twice /Year 3.5
Routine Monitoring by Yangguang Environmental Monitoring Station
1 Waste gas Chimney (Flue) SO2, Dust and NO2 Continuous monitoring EL3020 CEMS 10.0
2 Solid waste Plant Area Name, Amount and
Whereabout of Solid Waste Once/Month
Yangguang Power
Plant
Yangquan Municipal
Environment Monitoring
Station (EMS) and EPB
0.5
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6. Conclusion
To sum up, the completed rehabilitation project has brought outstanding effect of
energy conservation and emission reduction, and is favorable for the improvement of
local environmental quality; meanwhile, Yangguang has adopted environmental risk
mitigation measures and has basically followed EMP and Environmental Monitoring
Plan, and has conducted the routine monitoring on pollution source, so that the
emission standards have been met. However, the monitoring on factory boundary
noise shall be arranged at least once per year and the specified monitoring frequency
on wastewater shall be met.
For the proposed rehabilitation project of #2 boiler, due to the small engineering
amount, and the construction will be conducted inside the plant; therefore, the
environmental impact is slight. During the operation period, the proposed project will
not have any negative impact to surrounding environment; meanwhile, the
implementation of proposed project will reduce the emission of dust, SO2, NOX and
CO2, which will improve the local environmental quality, with good social and
environmental effect, as well as demonstration effect for energy conservation
rehabilitation of thermal power plants. In addition, the environmental risk mitigation
measures and EMP during construction period have been worked out, and the
environmental protection measures during the operation period have been improved
according to the latest requirement of environmental protection; therefore, the
proposed project is favorable for the constant improvement of local environmental
quality.