| 摘要 |
A process for removing sulphur dioxide from the gaseous effluent of a smelter furnace comprising the steps of: providing the gaseous effluent from a smelter; separating the sulphur dioxide from the gaseous effluent to provide concentrated sulphur dioxide and effluent for discharge into the atmosphere; mixing the concentrated sulphur dioxide with a fuel gas; heating the mixture such that the concentrated sulphur dioxide and fuel gas react to form a gaseous product mixture comprising sulphur and hydrogen sulphide; and removing the majority of, preferably substantially all of, the sulphur and hydrogen sulphide from the gaseous product mixture; wherein the remaining gaseous product mixture is incinerated before being vented into the atmosphere or is recycled into the smelter furnace. The remaining H2S may be removed by the CLAUS process; the formed sulfur may be liquid, when it is removed. The fuel gas may be a hydrocarbon, preferably methane and the reaction between SO2 and fuel gas may be carried at a temperature above 1000 °C, preferably at least 1300 °C. |
