Instrumentation and Controls for Coal Fired Power Plants · 2011. 3. 4. · Coal Pipe Balance -...
Transcript of Instrumentation and Controls for Coal Fired Power Plants · 2011. 3. 4. · Coal Pipe Balance -...
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Instrumentation and
Controls for
Coal Fired Power Plants
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Proven solutions for a tough industry
Air & Coal Flow Measurement Systems
OFA
IBAM
Pf-FLO
PASA
O2 and CO
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Microwave mass measurement
Cross-correlation velocity measurement
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Proven solutions for a tough industry
Mass (Density) and Velocity
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Proven solutions for a tough industry
Absolute Coal Flow
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Proven solutions for a tough industry
Absolute Coal Flow
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Coal Pipe Balance - Adjustable Orifice
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Burner to Burner Balancing
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Coal Pipe Balance - Adjustable Orifice
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Coal Flow Balancing
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Proven solutions for a tough industry
Mill Trip Ignoring Low Velocity
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Proven solutions for a tough industry
Avoiding Mill Trip with 5% PA Increase
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Proven solutions for a tough industry
Pulverizer Overview
Automatic PA “kicker” for lowest pipe velocity limit
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Proven solutions for a tough industry
Prevent Burner/Pipe Fires
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Proven solutions for a tough industry
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Wind Tunnel Testing at Air Monitor HQ
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Dynamic windbox flow profiles
› Fluctuating windbox pressure
› Ash build-up
Burner
1
Burner
2
Burner
3
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Proven solutions for a tough industry
Burner SA
Measurement –
IBAMs
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Proven solutions for a tough industry
F/A Screens in Control Room
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Proven solutions for a tough industry
New F/A Screens in Control Room
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Why CO ?
• O2 Measurement not reliable – drift and effects of boiler in-leakage.
• Reducing excess air leads to NOx reduction.
• To safely reduce excess air, need to measure CO.
• Measuring CO can help identify and correct poor combustion.
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Combine d CO and O2
Measurement
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Multi-Points in
Common Enclosure
Extraction Probe
with filter system
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Recent Project Results
(54 burner 770 MW unit)
• Boiler Efficiency Increase = 0.5%
– Annual fuel savings
• Combustion NOx Reduction
– 7% at full load, 15-25% at part load
– Annual Ammonia Reagent Usage Reduction
– SCR Catalyst Life Extension
• Fan Auxiliary Power Savings
• LOI Reduction