METHOD OF REDUCING THE OPACITY OF THE VISIBLE ALLOTTED TRAIN FROM THE LEEWARD Russian patent published in 2017 - IPC C05C9/00 B01D53/58 

FIELD: chemistry.

SUBSTANCE: method of reducing aerosol emissions from a urea granulation plant with the separation of the scrubbed liquids obtained includes: urea production with a granulator from a concentrated urea solution and evaporation of the water content to produce urea granules and waste gases including dust, ammonia and ammonium cyanate; and a subsequent step of cleaning or removing dust; and a subsequent acid purification step leading to the formation of a first stream containing mainly aerosols and a second stream containing ammonium salts; and a subsequent aerosol stage comprising spraying and collecting devices that release the first exhaust gas stream comprising air and a second stream of ammonium cyanate and water; and separation of a second stream of ammonium cyanate and water from the aerosol stage into a urea granulation plant or a urea fertiliser plant. Device for the production of urea granules.

EFFECT: inventions allow to catch by-products, ammonium cyanate, ammonia and water, isolate ammonium salts.

7 cl, 2 dwg, 2 tbl