SO3 / OLEUM TANK VENTS

PROCESS INFORMATION
Oleum and liquid SO3 is stored in tanks and when the tanks are being filled or emptied, there is an increase in vent vapour. Similarly, when loading into or from trucks & wagons there will be a SO3 fugitive vapour.This SO3 vapour will condense to form a white plume of sub-micron sized H2SO4 mist.Some H2SO4 plants connect the vent pipe back into the plant, but in some cases this causes problems such as mist being introduced into a tower where mist was not formerly a problem.

PROBLEMS TO SOLVE
Air pollution

DESIGN SOLUTION
The vapours are drawn from the tank into a 2-stage filtration system by a suction fan.The vapour is irrigated with water or 96% H2SO4, thus the SO3 is hydrolysed or absorbed into H2SO4, and the quantity of water or H2SO4 is dependant on the system size & vapour strength.

System options:

• Basic downflow pipe with liquid spray, followed by High Efficiency, Brownian Diffusion ‘Becofil’ Candle Filter, hanging type HT, with Glass Fibre elements and 316L Stainless Steel structure, followed by fan.
  
• BFCF design of Becoflex rotary brush scrubber which both dynamically enhances the hydrolysis and acts as the fan, followed by High Efficiency, Brownian Diffusion ‘Becofil’ Candle Filter, hanging type HT, with Glass Fibre elements and 316L Stainless Steel structure.
  
  
  
  
  Other Applications
  ASPHALT CHLORINE PRODUCTION - WET CHLORINE CHLORINE PRODUCTION / DRY CHLORINE CHLORINE PRODUCTION / HYDROGEN STREAM CHLORINE PRODUCTION / NaOH STREAM COMPRESSED GAS / AIR DETERGENT SULPHONATION / AFTER THE SULPHONATION REACTOR DETERGENT SULPHONATION / BEFORE THE SULPHONATION REACTOR DETERGENT SULPHONATION / HOW ‘STAR’ CANDLES EFFICIENTLY HANDLED HIGH MIST LOADS, SAVING ENERGY AND COST HYDROCHLORIC ACID NITRIC ACID / INLET AIR AND NH3 FILTERS,NITRIC ACID / INLET AIR AND NH3 FILTERS NITRIC ACID / PLATINUM CATALYST OR PALLADIUM DUST RECOVERY NITROGEN FERTILISERS / AMMONIUM NITRATE – NEUTRALISER & EVAPORATOR NITROGEN FERTILISERS / AMMONIUM NITRATE – PRILLING TOWER NITROGEN FERTILISERS / AMMONIUM NITRATE PRILLING TOWER – SELECTIVE FILTRATION OF ONLY MOST HEAVILY CONTAMINATED AIR NITROGEN FERTILISERS / UREA – PRILLING TOWER NITROGEN FERTILISERS / UREA –EVAPORATOR NITROGEN FERTILISERS / UREA PRILLING TOWER DEMISTERS & COALESCERS FOR LOW PRESSURE LOSS FILTRATION AND CONCURRENT NH3 ABSORBTION. NON-FERROUS METALS PRODUCTION - Process Tanks OIL REFINING - FCC Fractionator and Pipestill PHOSPHATE FERTILISER PRODUCTION - P2O5 Separation from Phosphate Slurry PHOSPHATE FERTILISER PRODUCTION - Reactor Tanks PHOSPHORIC ACID / P2O5 FILTRATION SYSTEMS PHOSPHORIC ACID / WAGON LOADING - FUGITIVE EMISSIONS CONTROL PVC / VINYL COATING - Direct heated oven / Indirect heated oven +lacquer / chlorinated additives PVC / VINYL COATING - Indirect heated oven and no lacquer or chlorinated additives SULPHURIC ACID / ACID CONCENTRATOR SULPHURIC ACID / ACID DISTRIBUTION SULPHURIC ACID / CROSS FLOW STRIPPER SULPHURIC ACID / DRYING TOWER SULPHURIC ACID / FINAL ABSORBTION TOWER IN SPENT ACID PLANTS SULPHURIC ACID / FINAL ABSORBTION TOWER OR SINGLE ABSORBTION TOWER SULPHURIC ACID / HEAT RECOVERY DESIGN PLANT INTERMEDIATE ABSORBTION TOWER SULPHURIC ACID / INTERMEDIATE ABSORBTION TOWER SULPHURIC ACID / Mercury Removal Tower SULPHURIC ACID / OLEUM UPSTREAM OF INTERMEDIATE ABSORBTION TOWER OR FINAL ABSORBTION TOWER OR SINGLE ABSORBTION TOWER SULPHURIC ACID PLANT SO2 TAIL GAS / NH3 / SO2 TAIL GAS SCRUBBING TOWER