PLANT FOR CLEANING OF INDUSTRIAL EXHAUST GASES WITH DIFFERENT CONTENT OF ACID COMPONENTS AND METHOD OF CLEANING OF INDUSTRIAL EXHAUST GASES Russian patent published in 2001 - IPC

FIELD: plants and methods of cleaning of industrial exhaust gases. SUBSTANCE: plant has the first scrubber for exhaust gases with circulation of washing liquid, the second scrubber and damping device for gas to be cleaned. The latter is adjusted for saturation of gas to be cleaned with steam. Lower part of the first scrubber serves additionally as oxidizing device for all washing solution. Method of industrial exhaust gases cleaning includes separation of sulfur oxides in the first scrubber and removal of remaining sulfur oxides in the second scrubber. In process of separation of oxides in direct flow in the first scrubber, value of pH in washing solution is maintained within 4.0-7.0, and in process of removal of remaining sulfur oxides and limiting breakthrough of ammonia in counterflow in the second scrubber, value of pH in washing solution is 3.0-5.5, mainly, with one-time limiting of ammonia breakthrough maximum up to 10 mg/cu.nm in clean gas. EFFECT: excluded objectionable exhaust from chimney stacks. 7 cl, 2 dwg