pollution in thermal power plant
TRANSCRIPT
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POLLUTION IN POWER PLANT
AIR
WATER SOUND
SOLID WASTE
HAZARDOUS WASTE
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PARAMETERS MONITORED
SPM
RSPM SOx
NOx
AIR POLLUTION
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SOURCE MONITORING
THERMAL STACK SPM, SOx & NOx
GAS STACK NOx
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METHODOLOGY FOR TESTING
SPM ISOKINETIC METHOD USING
HIGH VOLUME SAMPLER
NOX PDA METOD
SOX SPECTROMETRICALLY
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2
1
S.NO
100150200 MW &ABOVE
150350600< 200 MW
PROTECTED
mg/NM3
AFTER1979mg/NM3
OLD
mg/NM3UNITCAPACITY
SPM EMMISION STANDARDS FORTHERMAL POWER PLANT
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AMBIENT AIR QUALITY LIMITS
C
B
10003030100SENSITIVE
20008080200RESIDENTIAL &
RURAL
5000120120500INDUSTRIAL &MIXED USE
A
CONOxSO2SPM
CONC. IN MICROGRAM/M3
CATEGORYAREA
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NOX EMMISSION
400MW& ABOVE------50.0 PPM ON N.G
100.0 PPM ON NAPTHA
100-400MW--------75.0 PPM ON N.G
100.0 PPM ON NAPTHA
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WASTE WATER FROM A THERMALPOWER PLANT
BLOW DOWN FROM CONDENSER CWSYSTEM.
NEUTRALISED WASTE FROM DM PLANT &SOFTENING PLANT.
EFFLUENTS WITH HIGH TOTAL DISSOLVEDSOLIDS (TDS)
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EFFLUENTS WITH HIGH TOTAL SUSPENDEDSOLIDS (TSS)
COAL HANDLING PLANT
SERVICE WATER SYSTEM WASTE.
SLUDGE FROM PT PLANTBACKWASH WASTE WATER OF GRAVITY
FILTER & SOFTENING PLANT.
EFFLUENTS HAVING HIGH OIL CONTENT
OILY WASTE FROM FUEL OIL HANDLING
SYSTEM & OTHER OIL HANDLING AREAS.
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EFFLUENTS HAVING HIGH TEMPERATURE
BOILER BLOW-DOWN WATER
RETURN WATER OF CONDENSER COOLING
SYSTEMS IN PLANTS OPERATING ON ONCETHROUGH TYPE CIRCULATING WATERSYSTEM.
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PRESENT PRACTICE
TREATMENT FOR HIGH TDS WATER
Various systems designed to operate in a manner
that effluents from single systems when mixed
together at final disposal point meets the statutorylimits.
Circulating water & ash water recirculation system
are designed to operate with low or moderate COC tokeep TDS within limits in final effluent.
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TREATMENT FOR HIGH TSS WATER
Water with high TSS is recycled/reused in othersystems e.g. filter backwash waste is recycled back tothe clarifier.
Where reuse/recycle is not feasible, the treatmentfacility with setting ponds, tube settler/lamellaclarifier, centrifuge/filter press are being provided.
Dried sludge cake is used for land-fill and clear wateris recycled/reused.
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TREATMENT FOR HIGH OIL CONTENT WATER
Effluent is treated to remove oil using an oil separatorto keep the oil content of the effluent below thestatutory (10ppm) limit.
Clear water is recycled or disposed off from the plant.
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EFFLUENTS HAVING HIGH TEMPERATURE
The major effluent is the return water from thecondenser cooling systems in plants operating on oncethrough type circulating water system.
In recirculating type system using cooling towers ,
blow-down from the system is taken from the cold side
thereby eliminating the need for reducing the
temperature of the effluent prior to discharge.
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BOILERBLOW-DOWN
Negligible quantity Disposed off after mixing with other effluents or reused
in the water pretreatment plant/ash water system asmakeup.
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ENVIRONMENT LAB
THANKS