Method of removing sulphur dioxide from gases, more...

Details Method of removing sulphur dioxide from gases, more... Method of removing sulphur dioxide from gases, more...

B - Operations, Transporting

01

D

23/349

B01D 53/34 (2006.01) B01D 53/50 (2006.01)

Patent

CA 1107036

ABSTRACT OF THE DISCLOSURE The disclosure describes a process for the removal of sulfur dioxide from exhaust gases. These gases are treated in a scrubber with a solution containing ammonium sulfite and ammonium bisulfite to absorb the sulfur dioxide. A portion of this solution is drawn off and it is oxidized to form ammonium sulfate. The gas is further treated with the oxidized solution while maintaining the dew point of the further treated gas beneath the temperature of the gas, whereby the escape of ammonia in the further treating process is prevented. This process enables to prevent the loss of ammonia and avoid the use of expensive equipment for further scrubbing of the gas after treatment.

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