Norco, Louisiana, Marine Vapor Recovery Challenge The refinery uses sulfuric acid for their processing and brings in the fresh acid by barge. Once used, the spent sulfuric acid is pumped in to the barge. There were numerous odor and air quality complaints in the vicinity of the plant. Solution We developed a scrubber and thermal oxidizer system to eliminate the odors and the hazardous releases. Envent utilized the ESCRUB 1000 to eliminate the SO 2 vapors, which at times is up to 30% and the EMTOS 2500 to destruct any residual hydrocarbons. Pressure drop study to account for pulling through the recirculating scrubber and all of the hoses to make sure the scrubber and thermal oxidizer blower size was sufficient. Ensuring the right concentration of caustic to still mitigate the vapors and la

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