WASTE GAS CLEANING DEVICE AND WASTE GAS CLEANING METHOD Russian patent published in 2019 - IPC F01N3/08 

FIELD: machine building.

SUBSTANCE: exhaust gas cleaning device (1) comprises line (L₁₁) of exhaust gas, through which exhaust gas flows (G₁₁), released from electric power plant (10), waste heat boiler (11) utilizing off waste exhaust gas (G₁₁) heat of combustion, line (L_11B) of exhaust gas branching, which is provided so that it is connected from the upstream position to the downstream position of the waste heat boiler (11) on the main line (L_11A) of exhaust gas, nitrogen oxide removal unit (120) removing nitrogen oxide from the combined exhaust gas (G₂₁), into which exhaust gas (G_11A), flowing through main line (L_11A) of exhaust gas, and exhaust gas (G_11B), flowing through line (L_11B) of off-gas branch, combined waste heat boiler (12), utilizing exhaust heat of combined exhaust gas (G₂₁), from which nitrogen oxide was removed, and CO₂ extraction unit (13), extracting CO₂ from combined exhaust gas (G₂₁) of combustion, from which waste heat was recycled by combined waste heat boiler (12).

EFFECT: invention enables to reduce the accumulated amount of a component formed from nitrogen oxide in a CO₂ absorbing liquid, and limit increase in operating costs of plant.

14 cl, 7 dwg, 1 ex