METHOD FOR CLEANING FLUE GASES Russian patent published in 2023 - IPC B01D47/06 B01D53/52 

FIELD: environmental protection.

SUBSTANCE: invention can be used for cleaning flue gases of industrial facilities in which there is an emission of combustion products into the atmosphere, in particular for capturing pollutants from flue gases such as NO_x, SO₂, СО, CO₂, solid particles and fly ash. The flue gas cleaning method includes a source of hot flue gases, their successive humidification up to 100% in a humidification chamber and condensation in a wet gas cleaning apparatus within one process line. The humidification chamber and the wet scrubber are each connected to their own water spray circuit. The water temperature of the water spray circuit of the wet gas scrubber is lower than the temperature of the humidified hot flue gases entering the wet gas scrubber. After condensation in the wet gas cleaning apparatus, the cleaned flue gases are mixed with heated clean air coming from the heat exchanger located between the source of hot flue gases and the humidification chamber, and then enter the smoke exhauster and flue pipe.

EFFECT: invention makes it possible to reduce the relative humidity of the cleaned flue gases and exclude condensate at the outlet of the flue pipe and thereby increase the degree of flue gas purification from harmful impurities without additional energy costs, due to the fact that the method of flue gas purification within one process line includes its own circuits water spray for the humidification chamber and the wet gas scrubber, while the water temperature of the water spray circuit of the wet gas scrubber is lower than the temperature of humidified hot flue gases entering the wet gas scrubber , which makes it possible not to connect the flue gas cleaning process line to any separate systems (system) of water irrigation, in which a separate irrigation of the wet gas scrubber and the humidification chamber with different water at different temperatures would be implemented.

4 cl, 2 dwg