INSTALLATION FOR HEAT RECOVERY OF FLUE GASES AND PURIFICATION OF THEIR CONDENSATE Russian patent published in 2023 - IPC F22B1/18 

FIELD: thermal power engineering.

SUBSTANCE: installation for flue gas heat recovery and purification of their condensate contains a main gas duct to which a bypass gas duct is connected, on the line of which the following are installed in series along the gas flow: the first shut-off and control device, a gas-water surface heat exchanger, a smoke exhauster and a second shut-off and control device. The installation also contains a make-up water pipeline, on the line of which the first pump is installed. Moreover, the outlet of the make-up water pipeline is connected to the inlet of the first outlet pipeline, on the line of which a gas-to-water surface heat exchanger is installed countercurrent to the gas flow. The outlet of the first outlet pipeline is connected to the first inlet of the heating network make-up tank. The outlet of the make-up water pipeline is also connected to the inlet of the second outlet pipeline, on the line of which at least one heat exchanger is installed for heating water. The outlet of the second discharge pipeline is connected to the second inlet of the heating network feed tank. Moreover, the condensate collector of the gas-water surface heat exchanger is connected to a pipeline for condensate removal, on the line of which the following are installed in series along the water flow: a hydraulic seal, a condensate collection tank, a water flow meter, a second pump, a calciner, at least one mechanical filter and at least one cationite filter. The water flow meter is connected to the fan of the calciner. Moreover, the calciner is connected to the inlet of the third outlet pipeline, the outlet of which is connected to the bypass gas duct between the first shut-off and control device and the gas-to-water surface heat exchanger.

EFFECT: separation of condensate from flue gases discharged from the main gas duct to the bypass gas duct for heating make-up water; purification of condensate separated from flue gases; automatic regulation of the calciner fan speed depending on the amount of condensate entering it, separated from flue gases; reduction of losses of condensate separated from flue gases; and a decrease in the local concentration in the air of carbon dioxide CO₂ separated from the above condensate emitted into the atmosphere.

1 cl, 1 dwg