Heat Rate Improvement
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Transcript of Heat Rate Improvement
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HEAT RATE IMPROVEMENT IN THERMAL POWER PLANT
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HEAT RATE
Heat rate is heat input required per unit of power generated(kcal/kWh), for specific fuel conditions and specific site conditions.
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LOSSES
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Throttle PressureThrottle TemperatureHot Reheat TemperatureCondenser PressureMakeup FlowFeedwater Heater Drain Cooler Approach Temperature
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Main Steam Desuperheater Spray FlowReheat Desuperheater Spray FlowAuxiliary Electrical LoadsDry Gas LossCarbon Loss
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PARAMETERS TO BE OBSERVED
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Steam Temperatures a) Final Superheat outlet temperature b) Hot Reheat outlet temperatureAttemperation Flows a) Reheat b) SuperheatFW temperature at economizer outlet
1. BOILER-WATER/STEAM SIDE
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2. Boiler - Fire SideFlue gas temperaturesPrimary air header pressureFurnace draftWind box to furnace differentialFlue gas oxygen percentage rise across APH.
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Burner tilt positionSoot blowing steam usage
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Mill outlet temperaturesRatio of mill amps to coal flowTempering air
3. PULVERIZER
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Terminal Temperature DifferencesDrain Cooler ApproachesFeed water temperature at HPH outletHeater levelHeater vent positions
4. FEED WATER TEMPERATURE
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Recirculation V/V passing
4. BOILER FEED PUMP
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Number of leaking valvesSoot blower availability by areaMakeup water flowSteam flow to auxiliary equipment
6. OTHERS
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ROAD BLOCKSROAD BLOCKS
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Flexibility in scheduling of LRSBProvision of remote Wall blowing from UCBRegular checks on Locking of peep holesLeakage in steam traps
Recommendations
SHARP INCREASE IN THE QUALITY OF COAL*