SYSTEM AND METHOD FOR DENITRIFICATION OF FLUE GAS USING CARBON MONOXIDE Russian patent published in 2023 - IPC B01D53/62 B01D53/56 B01D53/86 F23J15/08 

FIELD: chemical industry; environmental protection.

SUBSTANCE: group of inventions is related to methods for removing carbon monoxide and flue gas denitrification. The method for carbon monoxide removal and flue gas denitrification includes the steps of: passing a feed flue gas G₁ into a feed flue gas transport pipeline; passing the initial flue gas G₁ into the bypass pipeline of the CO reactor and then passing the flue gas to the SCR reactor through the denitrification pipeline, and diverting the clean flue gas after denitrification from the pure flue gas outlet of the SCR reactor. The hot air generating device is started and the nitric oxide-containing flue gas G2 is passed into the SCR reactor, followed by withdrawal of the clean flue gas after denitrification from the pure flue gas outlet of the SCR reactor. A method for carbon monoxide removal and flue gas denitrification is also claimed, which includes the steps of passing the flue gas through the first heat exchange zone of the GGH heat exchanger to perform heat exchange and then entering the feed flue gas transportation pipeline to obtain a heated feed flue gas. The hot air generation device is started, one line of hot air generated by the hot air generation device is directed into the pipeline to transport the source flue gas through the pipeline. Another line of hot air generated by the hot air generating device is directed to the main reaction column of the CO reactor. The nitric oxide-containing flue gas G2 is passed to the SCR reactor through a conduit to effect denitrification. Clean flue gas after denitrification is passed into the second heat exchange zone of the GGH heat exchanger for heat exchange and then removed. The heat generated in the process of converting carbon monoxide to carbon dioxide achieves the purpose of raising the temperature of the flue gas to carry out denitrification treatment, which saves fuel consumption, and also avoids the problem that the CO catalyst is prone to deactivation when contacted with sulfur oxide when low temperatures.

EFFECT: group of inventions enables removal of carbon monoxide and flue gas denitrification.

10 cl, 4 dwg, 12 ex