RECOVERY SYSTEM AND METHOD FOR PROCESSING A GAS STREAM FROM A UREA PLANT SOLIDIFICATION UNIT Russian patent published in 2019 - IPC B01D53/58 C07C273/04 

FIELD: technological processes.

SUBSTANCE: invention relates to a regeneration method for treating a gas stream from a urea plant solidification unit, in particular a cooling air stream used in a solidification unit and containing ammonia. Method includes the step of processing a gas stream from a solidification unit in a scrubber for removing ammonia from the gas stream from the solidification unit through a reaction with at least one molten salt of a metal capable of forming ammonia complexes. Wherein a reaction composition comprising at least one of said molten salt of a metal capable of forming ammonia complexes enters the scrubber. Gas stream produced in the solidification unit is further freed from ammonia inside the scrubber, and ammonia is bound by the metal contained in the salt of the reaction composition, and an ammonia complex is formed. Recovery solution comprising the ammonia complex in the aqueous solution is further removed from the scrubber and sent to the heat treating unit.

EFFECT: efficient recovery and reuse of each component used or produced by the recovery method are provided.

10 cl, 7 dwg, 1 ex