METHOD AND SYSTEM FOR DESULPHURATION OF GASES FROM PULP MILL, WHICH POSSESS UNPLEASANT SMELL Russian patent published in 2009 - IPC D21C11/06 

FIELD: chemistry.

SUBSTANCE: method involves collecting concentrated gases possessing an unpleasant smell, containing sulphur compounds, and burning the collected gases to oxidize the sulphur compounds. Concentrated gases with unpleasant smells are burnt in an air index of less than one in the first aggregate for burning using the Claus method in such a way that, at least an essential part of the sulphur compounds are oxidized to elementary sulphur. At least 10 mol. % of the sulphur compounds which have passed through the Claus system are later burnt in the device for burning the second aggregate.

EFFECT: obtaining elementary sulphur, isolated in liquid or solid state, which can be returned to the production cycle or used for other practical purposes, is ensured.

24 cl, 5 dwg