| 摘要 |
The invention relates to a method for separating sulphur dioxide, whereby the off-gas (2) is impinged upon by sea water fed from a pump well (14) in an absorption tower (2) for the absorption of sulphur dioxide and for the conversion of the absorbed sulphur dioxide into bisulphites by bicarbonate contained in the sea water using washing jets (11). The liquid sump (15) of the absorption tower is aerated, the liquid is extracted from the liquid sump and is mixed with fresh seawater for neutralisation purposes. In order to simplify measurement and control of the process without the need for a separate post-reaction basin, the invention provides for measurement of the volumetric flow rate and at least the sulphur dioxide content of the raw gas (6), in addition to the bicarbonate content (24) of the seawater pumped to the pump well, the volumetric flow rate (23) of the seawater fed to the pump well is measured or the volumetric flow rate (29) of the liquid extracted from the liquid sump of the absorption tower is measured and the water flowing into the pump well which is fluidically connected to the liquid sump of the absorption tower is controlled according to the amount of sulphur dioxide that is to be separated in such a way that the extracted liquid contains substantial amounts of sulphates. |
