Economizer bypass with ammonia injection

Details Economizer bypass with ammonia injection Economizer bypass with ammonia injection

B - Operations, Transporting

01

D

B01D 53/56 (2006.01) F23J 15/00 (2006.01) F23J 15/02 (2006.01)

Patent

CA 2460554

A NOx removal system for a furnace or boiler with an economizer has two separate ammonia injection grids (AIG) upstream of an SCR. A primary AIG is positioned adjacent the flue gas outlet of the economizer and upstream of an economizer bypass outlet. A secondary AIG is located within an economizer flue gas bypass. The separate AIGs permit a reduction in the overall length of the flue between the economizer and SCR, thereby reducing the NOx removal system footprint, cost and quantity of materials.

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