| 摘要 |
A gas cleaning system, which is operative for cleaning a process gas cont aining carbon dioxide and sulphur dioxide, comprises a combined cooling and cleaning system (16), and a CO2-absorber. The combined cooling and cleaning system (16) comprises a first gas-liquid contacting device (50) located upst ream of the CO2-absorber and operative for cooling the process gas by means of a cooling liquid, and for absorbing into the cooling liquid sulphur dioxi de of the process gas, such that a cooling liquid containing sulphate is obt ained. The combined cooling and cleaning system (16) further comprises a sec ond gas-liquid contacting device (94) located downstream of the CO2-absorber and operative for removing ammonia from the process gas, which has been tre ated in the CO2-absorber, by means of bringing the process gas containing am monia into contact with the cooling liquid containing sulphate. |
