Patent ID: 9687780
Date: 2017-06-27
CPC Classifications: B01D,C01B,C22B,F27D,F27M,Y02C,Y02P

Claim:
1. A process for removing sulphur dioxide from the gaseous effluent of a smelter furnace comprising the steps of: a) providing the gaseous effluent from a smelter; b) separating the sulphur dioxide from the gaseous effluent to provide concentrated sulphur dioxide and effluent for discharge into the atmosphere; c) mixing the concentrated sulphur dioxide with a fuel gas to form a fuel gas-sulphur dioxide mixture; d) heating the fuel gas-sulphur dioxide mixture by combusting fuel gas in the fuel gas-sulphur dioxide mixture with oxygen such that the concentrated sulphur dioxide and fuel gas react to form a gaseous product mixture comprising sulphur and hydrogen sulphide; and e) removing the majority of the sulphur and hydrogen sulphide from the gaseous product mixture; characterised in that the remaining gaseous product mixture is incinerated in an incinerator before being vented into the atmosphere.