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Transcript of N. Dust Control.pdf
8/10/2019 N. Dust Control.pdf
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1
Dust Contro l
Indonesia Customer Seminar
June 13 & 14 2012
Jakarta Indonesia
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Dust Control Applications
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Typical Coal Handling Facility
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Dust Control- Key Programs for Power
DustFoamPlus Wet surfactant spray
@ 1:2000 dilution
Applied @ transfer points
between rail/truck dump
and stockpile
DustFoamPlus Foam residual dust
suppression;
normally applied
after reclaim
Applied after reclaim @
crushers, transfer points,
tripper deck
Dust-Ban 7977 Prevents windage,
erosion loss on
storage pile
Treatment lasts 30 days
DustBind Inactive coal pile
crusting agent
3 step application per CPP;
lasts 4 mos. or longer
Haul-E-Z 81201 Residual road dust
control
Also used as belt de-icer,
coal pile freeze protection;
green product, non-glycol
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DustFoam, DustFoamPlus
Minimal BTU penalty (< 0.5%moisture addition)
Residual dust control
> 80% airborne dust reduction isachievable
Biodegradable
Maximum expansion ratio
Highly effective on PRB
Before DustFoam
After DustFoam
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6
Typical Foam System Layout
Electrical
Auto/Switch
DustFoamPlus
Control
Module
Expansion
Chamber
Chemical Plant Water
Plant Air
Solution (Water /Chemical)
Plant Air
Material and/or Motion Sensor
IMPORTANT
TOTAL HOSE
LENGTHS FROM
EXPANSION
CHAMBER TOSPRAY NOZZLES
MUST BE 30 FT
OR LESS.
ALL HOSES MUST
BE IDENTICAL IN
DIAMETER &
LENGTH.
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Model DF20S Standard Control Module
• Mounted in a 42”x 36”NEMA 4 dust tight Cabinet. • 20 GPM water driven dosing pump.
• Air, water and solution lines, check valves.
• Air/water Pressure regulators, gauges and Flow meters.
• Air/solution Flow control ball valves with air actuators.
• 2” 100 mesh water strainer and 200 mesh filter.
• Purge system for freeze protection.
Electric control options
Model DFCP- PL Logic control panel for ‘auto’ on/off operation. • 120 VAC ‘PLC’ controls mounted in a 16”x 14” NEMA 4X Cabinet.
(or)
Model DFCP-S ‘Standard Relay panel for ‘auto’ on/off operation. • 120 VAC standard relay controls mounted in a 16”x 14” NEMA 4X
Cabinet.
Expansion Chambers• 24”x 6”, 30”x 6” or 40”x 6” (depending upon required foam output)
expansion chamber with top and bottom fittings, control valves, gauges
and up to 6 foam outlets.
Standard 800 TPH Foam System
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Excellent „dry‟ stable micro bubble structured Foam
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9
Excellent ‘dry’ stable micro bubble structured foam sprays
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‘Inefficient’ poor large bubble structured Foam
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DustFoam Spray to Head Box
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Radial Stackout With and Without DustFoam
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Wet Suppression @ Rotary Car Dump
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Dust Monitoring Equipment
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Monitoring Results With & Without DustFoam
2A Feeders W/O Dustfoam
0
1
2
3
4
5
6
7
8
0 8 : 3 2 : 1 2
0 8 : 4 5 : 1 2
0 8 : 5 8 : 1 2
0 9 : 1 1 : 1 2
0 9 : 2 4 : 1 2
0 9 : 3 7 : 1 2
0 9 : 5 0 : 1 2
1 0 : 0 3 : 1 2
1 0 : 1 6 : 1 2
1 0 : 2 9 : 1 2
1 0 : 4 2 : 1 2
1 0 : 5 5 : 1 2
1 1 : 0 8 : 1 2
1 1 : 2 1 : 1 2
1 1 : 3 4 : 1 2
1 1 : 4 7 : 1 2
1 2 : 0 0 : 1 2
1 2 : 1 3 : 1 2
1 2 : 2 6 : 1 2
1 2 : 3 9 : 1 2
1 2 : 5 2 : 1 2
1 3 : 0 5 : 1 2
1 3 : 1 8 : 1 2
1 3 : 3 1 : 1 2
1 3 : 4 4 : 1 2
1 3 : 5 7 : 1 2
1 4 : 1 0 : 1 2
1 4 : 2 3 : 1 2
1 4 : 3 6 : 1 2
1 4 : 4 9 : 1 2
1 5 : 0 2 : 1 2
1 5 : 1 5 : 1 2
1 5 : 2 8 : 1 2
1 5 : 4 1 : 1 2
1 5 : 5 4 : 1 2
1 6 : 0 7 : 1 2
1 6 : 2 0 : 1 2
m g / m 3 Avg. 1.37 mg/m3
Max. 12.9 mg/m3
2A Feeders With Dustfoam
00.20.40.60.81
1.21.41.61.8
2
0 9 : 5 1 : 1 2
0 9 : 5 8 : 1 2
1 0 : 0 5 : 1 2
1 0 : 1 2 : 1 2
1 0 : 1 9 : 1 2
1 0 : 2 6 : 1 2
1 0 : 3 3 : 1 2
1 0 : 4 0 : 1 2
1 0 : 4 7 : 1 2
1 0 : 5 4 : 1 2
1 1 : 0 1 : 1 2
1 1 : 0 8 : 1 2
1 1 : 1 5 : 1 2
1 1 : 2 2 : 1 2
1 1 : 2 9 : 1 2
1 1 : 3 6 : 1 2
1 1 : 4 3 : 1 2
1 1 : 5 0 : 1 2
1 1 : 5 7 : 1 2
1 2 : 0 4 : 1 2
1 2 : 1 1 : 1 2
1 2 : 1 8 : 1 2
1 2 : 2 5 : 1 2
1 2 : 3 2 : 1 2
1 2 : 3 9 : 1 2
1 2 : 4 6 : 1 2
1 2 : 5 3 : 1 2
1 3 : 0 0 : 1 2
1 3 : 0 7 : 1 2
1 3 : 1 4 : 1 2
1 3 : 2 1 : 1 2
1 3 : 2 8 : 1 2
1 3 : 3 5 : 1 2
1 3 : 4 2 : 1 2
1 3 : 4 9 : 1 2
1 3 : 5 6 : 1 2
m g
/ m 3
Average 0.188 mg/m3
Maximum 2.7 mg/m3
(Vibratory feeders under reclaim pile)
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Live Storage With & Without DustFoam
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Filling Water Truck for DustBind Application
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Spraying Pile With DustBind Solution
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Spraying DustBind With Water Cannon
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DustBind Surface
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Dust Control
Rule of Thumb: 1 spray or foam application (at transferpoint) for each 500 tons/hr coal flow; e.g., if 600 tons/hrcoal flow, 2 application points are required
Off-the shelf foam equipment supplied by Viking Equipt.,Inc.
CPPs for the various dust control products containdetailed application instructions
A 500 MW unit burns 230 tons/hr bituminous coal, hr,
i.e., 0.460 tons/MW
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Freeze Conditioning Agent (FCA)
Eliminice 8882 Belt Deicer (can be used as haul road
dust control agent also)
Nalco‟s patented glycerin-based FCA; a very unique“green” product
Other commodity-type FCA have big drawbacks: Glycol FCA products are very toxic
Calcium chloride is corrosive to coal handling equipment andboiler internals
Nalco 8880 used for coal load-out, side release agent incoal rail cars, etc.
FCA spray equipment systems available from VikingEquip. or Boggs Municipal Services Co.
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Problem Locations for Wet Coal
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Wet Coal Flow Additive
Coal feeder
Injection
nozzle assy
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Case study: Wet Coal Flow Additive
165 pulverized coal-fired unit (PRB coal)
Wet coal plugs between the coal feeder(s) and thepulverizers
DustCon injected as neat product into downcomer chute@ 0.25-0.50 pints/ton
Use standard feed skid (part no. IM1A02A0.88) withhollow cone nozzle assy
Best results when fed intermittently; 15 min. to onefeeder, then 15 min. to the next, etc. (4 feeders total)
Coat inside surface of downcomer chute
Treatment prevents loss of 1 feeder, 25% of total coalfeed to boiler
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DISCUSSION