Process for removing sulphur dioxide from a gas stream

摘要

In a process for removing sulphur dioxide from a gas stream using an aqueous alkaline scrubbing liquid, in particular a suspension, in a first absorption stage and a second absorption stage downstream of this on the gas side, scrubbing liquid from the scrubbing circuit of the second absorption stage being transferred to the scrubbing circuit of the first absorption stage, scrubbing liquid from the scrubbing circuit of the first absorption stage being fed to a dewatering device, liquid from the dewatering device being returned to the scrubbing circuit of the first absorption stage and in which a liquid stream is fed to the second absorption stage, which liquid stream dilutes the scrubbing liquid of the second scrubbing circuit, to simplify the process flow, it is provided that the diluting liquid stream fed to the second absorption stage is liquid from the dewatering device. <IMAGE>