Gas Analyzer Probe LaserOFCEAS€¦ · 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 1589.2 1589.25...
Transcript of Gas Analyzer Probe LaserOFCEAS€¦ · 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 1589.2 1589.25...
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(OFCEAS)Optical Feedback Cavity Enhanced
Absorption Spectroscopy
Model 8000 Gas Analyzer
AP2E
Gas Analyzer Probe & Laser OFCEAS
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Model 8000 Gas Analyzer
Now Available to Monitor Nox, CO2, SO2, O2CO Coming Soon!
Control Unit Insitu Detector Probe
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Typical Locations
CEMTEK 8000Probe System
Monitor NOx SCR inlet /outlet to determinescrubber efficiency
Each Probe consists of acomplete system
Low Cost NoncompliantSystem
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Applications & Technology
Measurement method
NOx solid state Chemiluminescence sensorSO2 – NDUV
O2 Zirconia planar sensorCO2 – Infrared sensor (NDIR)
NOx probe product is Designed for
Post combustion SCR inlet/outlet monitoringCombustion turbine tuning
Low Nox burner tuning
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Basic ComponentsAnalyzer controller
houses the control electronics and flow controls
Probe contains the dilution block and configured measurement sensors:NO, NO2, O2, CO2
Interconnect cable contains the, calibration gas line, dilution air line,thermocouple and power cables.
Duct / Stack Mounted Analyzer
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Analyzer Controller
Flow Control AssemblyCal Span Gas &
Instrument air
Instrument Air
Calibration
Dilution
EnclosureNEMA 4
Optional 4X SS
HMI Display
Heaters/VAC
Control/VDC
Dimensions:
12” x 16” (9.4”deep)
¼” swagelockfittings
Control Board Assembly
Controller Components
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Dilution Probe Enclosure
Ozonator
NOx Sensor
Instrument Air
Calibration Dilution
Control/VDC
Heaters/VAC
Probe
Temp ControlHeater
Dimensions:
16” x 20” x 9.78” (to flange)
¼” swagelock fittings
Max ambient temp: 140F
NEMA 4/NEMA 4X SS(option)
Mounting:
via 5/8” studs ontocustomer supplied process
flange
Probe Enclosure Components
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Probe Advantages
Low Flow – Dilution sample technology, EPAprovenNo Sample ConditioningFast Response 5 seconds to 90% step changeLow Maintenance, low installation costRobust Probe Mounted OPTIONAL O2 and NO2converter
Advantages ofIn Probe Design
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Pneumatic Block Assembly
Regulates all the systemflows
Consists of balance regulators& plumbing
2 flow regulators control theflow of calibration gas &instrument air supply to theNOx sensor.
At the same time eductorplumbing feeds the pump airsupply
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Installation Requirements
All connections are via the 1.5” Conduit Connection
One ¼” Swagelok port for calibration gas, concentration is dependent on
range, xx ppm NO in N2
One ¼ Swagelok port for instrument air (1.5 SCFM @ 80 psi). Clean dry air @
30F dew point, for dilution air & zero gas.
Air Clean up Panel is available as an option (compressed air unavailable)
Signals to customer control are isolated 4 20 mA analog
General Fault alarm – analyzer powered 24v dc
Power consumption of 5A (max on startup) at 120VAC.
System Installation Requirements
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Controller Interface
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Multi unit Installation
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Installation References(Details Available)
• AEP, Environmental Equipment Performanceoffice
• Genon Energy Reading PA (7EA CT)
• AEP Gavin Plant
• Ameren Energy Edwards Station
• TVA Kingston Plant
• Hoosier Energy Coop Merom Station
• OVEC Kyger Creek Plant
• First Energy, Bruce Mansfield
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SCR Performance Optimization
Actual time differential between 8000 NOx Probe & DilutionExtractive System – approximately 90 secs
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AP2E Patented System
Low PressureSampling System
Low PressureSampling System
(OFCEAS)Optical Feedback Cavity Enhanced
Absorption Spectroscopy
(OFCEAS)Optical Feedback Cavity Enhanced
Absorption Spectroscopy
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Low Pressure Sampling
On line gas analysis measurement, extremely fast response time, high sensitivity,no drift, minimal interference.
Simplified minimal sampling system, multigas measurement capability
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Measurable Compounds
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Improved Sensitivity
Increased Signal IntensityReduced Signal NoiseImproved Response Linearity
Direct Intensity MeasurementSelf Referencing Device
Self StabilizationSelf Standardization
Part 1(OFCEAS)
OpticalFeedbackCavityEnhancedAbsorptionSpectroscopy
Part 1(OFCEAS)
OpticalFeedbackCavityEnhancedAbsorptionSpectroscopy
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Traditional Design: Multipass Gas CellPathlength = l1 = 1 – 10 m
Concentration = Absorbtion / length.
Improved Sensitivity
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OFCEAS design: Hyper-Reflective Gas CellPathlength = l2 = 1 – 10 km
Concentration = Absorbtion / length.
Sensitivity Improvementl2 / l1 = 1,000 X
1 MHz BW
Improved Sensitivity
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Feedback enables increased laser purity
Reduced Noise(single scan noise = 4.10 10 A.U.)
Increased Signal Intensity(10X increase compared to laser alone)
Improved Instrumental Response Linearity(4 orders of magnitude)
0.01 MHz BW
Signal Noise andResponse Improvements
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Laser Intensity(mA)
Wavelength
Injected Laser beam wavelengthcontrolled by applying a current
(0.002 nm / mA)
Continuous intensity spectrum
200 equidistant data points
0.00112 nm optical resolution
Discrete spectrum
Direct MeasurementSelf Referencing
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20
80
(nm)T + d I
T
t(ms)
2 3 199 200
100 ms
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0.00112nm0.005cm-1
0.22 nm centered @ 1,500 nm
Injected Laser beam wavelengthcontrolled by applying a current
(0.002 nm / mA)
Continuous intensity spectrum
200 equidistant data points
0.00112 nm optical resolution
Direct MeasurementSelf Referencing
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0.00112nm0.005cm-1
I0 (ZERO) I (conc.)
Each spectrum contains bothI(concentration) and
I0 (re zero) informationNO REFERENCE GAS
REQUIRED
Raw Spectrum
Direct MeasurementSelf Referencing
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Beamsplitter / PhotoDiodeContinuous intensity standardization
Piezo Electric Motor Controller MirrorPhase synchronization
Ring Down Measurement(after each spectrum)Check gas cell cleanliness
Laser FeedbackSelf Stabilization (mode locking)
NO DRIFT
Self Stabilization &Standardization
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Optical Bench
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1 Increasing sensitivity over standard gas cells by increasing pathlength to up 20 km (a1,000x improvement in signal intensity)
2 Improve wavelength accuracy by 100x, reducing noise and increasing signal intensity byfeeding back the laser beam onto itself
3 Self stabilizing the spectrometer by monitoring (and compensating for) the variationsof intensity of the laser IR source
4 Providing information at 200 different wavelengths every 100 millisecond for multi gasanalysis and self referencing capabilities
5 Reducing sample conditioning, and cleaning requirements, and accelerating responsetime by operating at low pressure
Technology of OFCEAS
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Improved Sensitivity
Increased Signal IntensityReduced Signal NoiseImproved Response Linearity
Direct Intensity MeasurementSelf Referencing Device
Self StabilizationSelf Standardization
100 mBar Experimental
• Wavelength accurate
• Multi componentsingle laser application.
• Simultaneousmeasurement ofspecies @ ppm leveland species @ %concentration levels
• No interference / falsepositive response
• Absolute measurement(no re zero)
• Self standardizingsystem (no drift)
Spectrometers vs. OFCEAS
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Selectivity: NDIR vs. FTIR
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NDIR/FTIR selectivityH2S example low res/ high interference
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Part 2(LPS)
L owP ressure (50 mBar)S ampling
Part 2(LPS)
L owP ressure (50 mBar)S ampling
Absorption Bands Narrowing,Matching Spectral InformationTo Optical Resolution
Avoiding Condensates InThe Sampling Line
Faster Sample Transfer Times
Minimized Maintenance
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800mbr
400mbr
200mbr
100mbr
Narrows the bandwidth of the absorption bands touse the full potential of the extremely low optical
resolution.Avoids interferences and false positive response.
CO2 (30%) CH4 (30%) H2S (300 ppm)
Absorption Bands
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As pressure decreases . . .… so does theboiling point …
… and so does thedew point..
Pressure (atm.)Critical Point
Solid(ice)
Liquid Gas(vapor)
Avoiding Condensates
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No Heated Lines Required *
Sampling post SCRemissions at a trashincinerator facility.
Sampling engineemissions at engine
research facility.
* No heated line required if H2O < 20% vol. and T > 10 Celsius. Otherwise, 40 Celsius heating required.
Avoiding Condensates
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Flow Rate @Sampling Probe 3 – 9 L/h
Flow Rate @Inside Line 30 – 90 L/h
Transfer Time(4/6 tubing) ~ 5 sec / 10 m
Faster Transfer Times
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High velocity flow rate under low pressure samplingmeans less sample drawn across the filter and
less maintenance.
Quartz wool filterafter 3 months of usesampling post SCRemissions at a trashincinerator facility.
Minimized Maintenance
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Feature
Feedback – 10x signal intensity increase
Analytical Benefit
Sensitivity (ppt levels)
Feedback – 10 KHz laser bandwidth0.00112 nm resolution
Multicomponent analysis single laser(e.g. SO2, O2, H2S, CH4, C2H6, etc)
Low Pressure Sampling Remove problem with condensableRemoves interferences issues.
104 Dynamic Range Measure ppm and percent level speciessimultaneously.
Scanning Speed / Co Addition 1 full spectrum (200 equidistant discretedata points collected every 100 ms)Fast response time; low signal noise.
Absolute measurementNo re calibration required.No re zero required.No instrumental response drift.
ProCeas ®Trace Gas Analyzers
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SAMPLING SPECIFICATIONS
Flow RateMax Temp. (°C)Max HumiditySample pressure
3 – 9 liter/hour600°CH2O < 25% vol. (absolute)Atm +/ 100mbar
OPERATIONAL SPECIFICATION
Operational Temp. (°C)
Sampling ProbePower RequirementsPower InputOil free compressed air
15 25°C(10 40°C optional)Sonic Sampler (input)200 W110 – 220V/50 60Hz1 6 bars (not provided)
DIMENSIONS
Dimensions
WeightWall mounted versionATEX version
19’’ RackDepth: 545mm (21.8 in.)30 kg (66 lbs)On requestOn request
SOFTWARE SPECIFICATIONS
Display / Control
SoftwareOperating System
Color touchscreen (5.7”diagonal)Win ProCeas ©Windows ® XP ®
DATA I/O’s
Standard:• Ethernet Protocol• RS485, RS232• Analog I/O & TOR
Optional:• MODBUS• other on request
ANALYTICAL SPECIFICATIONS
RepeatabilityZero drift
Stability
< 0.5 % rel. to max in rangeNone(Absolute Measurement)< 1% of full scale
ProCeas ®Trace Gas Analyzers
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ProCeas Trace Gas AnalyzersExisting Installations 1/3
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ProCeas Trace Gas AnalyzersExisting Installations 2/3
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ProCeas Trace Gas AnalyzersExisting Installations 3/3
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Thank you . . .I appreciate your time
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