Flue gas purification method

Details Flue gas purification method Flue gas purification method

B - Operations, Transporting

01

D

B01D 53/60 (2006.01)

Patent

CA 2500734

A method of scrubbing SOx, NOx compounds and other air toxins from a flue gas stream. In the method, two distinct unit operations are amalgamated to scrub SOx, NOx and other air toxins compounds from a flue gas stream. More specifically, there is a dry scrubbing operation and a wet scrubbing operation. The dry injection scrubbing operation involves contacting a flue gas stream containing SOx and NOx compounds with a sorbent for removing substantially all of the SOx and NOx compounds present in the stream. The second wet scrubbing operation involves contacting the stream to remove any residual SOx, NOx compounds, and other air toxins remaining in the stream.

L'invention concerne un procédé visant à épurer un flux de gaz de combustion de ses composés SO¿x?, NO¿x? et d'autres composés toxiques atmosphériques. Pour ce faire, le procédé combine deux opérations distinctes. Plus spécifiquement, une opération d'épuration à sec et une opération d'épuration par voie humide sont mises en oeuvre. L'opération d'épuration par injection à sec comporte la mise en contact d'un flux de gaz de combustion renfermant des composés SO¿x? et NO¿x? avec un sorbant, afin d'éliminer sensiblement tous les composés SO¿x ?et NO¿x? présents dans le flux. La deuxième opération d'épuration, par voie humide, comporte le traitement du flux de gaz de combustion en vue d'éliminer tous les composés SO¿x?, NO¿x? résiduels et d'autres composés toxiques atmosphériques restant dans ledit flux.

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