| 摘要 |
A process for removing hydrogen sulphide and sulphur dioxide from a Claus reaction tail gas comprises separating the tail gas into two partial streams, conducting the first partial stream through a first catalyst bed charged with sulphur while at a temperature above the sulphur dew point, separating out the discharged sulphur from the first partial stream by condensation, combining the first partial stream freed from sulphur with the second partial stream, and passing the combined gas stream through a second catalyst bed already freed from sulphur while at a temperature below the sulphur dew point. When the second catalyst bed becomes charged with sulphur and the first catalyst bed becomes free of sulphur, the flow of gas through the beds is reversed. |
