Method for removing unwanted gaseous components from hot...

Details Method for removing unwanted gaseous components from hot... Method for removing unwanted gaseous components from hot...

B - Operations, Transporting

01

D

23/350

B01D 53/14 (2006.01)

Patent

CA 1213126

ABSTRACT OF THE DISCLOSURE A method for removing unwanted gaseous compon- ents from hot flue-gases, produced by combustion of carbon-containing fuels, is described. For purposes of cooling and precleaning, the flue-gas is passed through regenerators and then to a washer, containing a physically acting solvent, in order to absorb SO2. After absorbing the SO2, the said solvent is subjected to regeneration and is then returned to the washer. In order to save energy, it is proposed that the hot flue-gas in the regenerators be cooled, in heat-exchange with atmospheric air, to temperatures of between 0 and 60°C, and that it be washed, at that temperature, with a solvent consisting mainly of tetraethylene-glycol dimethylether. The method according to the invention permits full utilization of the waste-heat from the flue-gas to be cleaned.

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