Patent ID: 6060030
Filing Date: 2000-05-09
Classification: B01D,Y10S

Abstract:
A method of using a liquid spray to treat the effluent gases contaminated with acidic components and ammonia in an air pollution control system and inhibit the formation of plumes of visible particles comprised of ammonium salts in the atmosphere proximate the outlet of the pollution control system, the method comprising the steps of:selecting the liquid flow rate of the liquid sprayed from a nozzle into the effluent gas flow;selecting the mean diameter of the spray droplets sprayed into the effluent gas flow;injecting a controlled flow rate of an alkaline scrubbing material into the spray liquid to be sprayed such that the pH of the spray droplets is selected to be greater than about 11 so that said acidic contaminants preferentially react with the spray droplets rather than the ammoniathereby reducing the formation of visible plumes of ammonium salts in the atmosphere, andinjecting the alkaline spray liquid into the effluent gases so that the acidic components react with the alkaline scrubbing material.