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Environmental Standards
 
Your are here : Home| Environmental Standards | Proposed Standards/Rules | Emission Standards for Sulphuric Acid Plant
EXISTING PLANTS:
Plant Capacity (MTPD) SO2 Acid Mist & SO3 (mg/Nm3)
Load (Kg/MT of 100% conc. acid production) Concentration (mg/Nm3 )  
Up to 300 2.5 1370 90 70
 
NOTE:
  • For plants having more than one stream/unit at the same location, combined capacity of all the streams/units shall be applicable on all the individual streams/units for compliance of the above norms.
  • The Stack Height of Sulphuric Acid Plant shall be 30 m or as per the formula given below, whichever is more:
  • H = 14 (Q) 0.3
  • Where "H" is the Height of Stack in meters; and "Q" is the maximum quantity of SO2 expected to go out through the stack at 110% of the rated capacity of the plant as per the norms of gaseous emission. Whenever this formula is revised, the same will be applicable for determining the stack height in respect of the plants commissioned after notification of revised formula for stack height.
  • Scrubbing units shall have on-line pH meters with recording facility.
  • State Pollution Control Board may prescribe more stringent standard, if local conditions demand so.
NEW PLANTS:
Plant Capacity (MTPD) SO2 Acid Mist & SO3 (mg/Nm3)
Load (Kg/MT of 100% conc. acid production) Concentration (mg/Nm3 )  
Up to 300 2.0 1250 70
Above 300 1.5 950 50
 
NOTE:
  • For plants having more than one stream/unit at the same location, combined capacity of all the streams/units shall be applicable on all the individual streams/units for compliance of the above norms.
  • Scrubbing units shall have on-line pH meters with recording facility.
  • The Stack Height of Sulphuric Acid Plant shall be 30 m or as per the formula given below, whichever is more:

    H = 14 (Q) 0.3

    Where "H" is the Height of Stack in meters; and "Q" is the maximum quantity of SO2 expected to go out through the stack at 110% of the rated capacity of the plant as per the norms of gaseous emission. Whenever this formula is revised, the same will be applicable for determining the stack height in respect of the plants commissioned after notification of revised formula for stack height.

  • For Sulphuric Acid Plants having more than one stream/unit at one location, the combined capacity of all the streams/units shall be considered for determining the Stack Height.
  • In Sulphuric Acid Plants, where there is separate stack for emission of gases from the Scrubbing Unit, the height of this stack shall also conform to the norm as for the Main Plant.
  • State Pollution Control Board may prescribe more stringent standard, if local conditions demand so.