METHOD FOR LIQUEFACTION OF FURNACE GAS FROM COMBUSTION PLANTS Russian patent published in 2015 - IPC F25J3/02 F25J3/06 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the method of production of liquid CO₂ from gaseous combustion products. Furnace gas is compressed in the first compressor, then it is cooled in the first cooler and is partially condensed at two separation steps. Two separation steps are cool by the expanding flue gas and the expanding liquid CO₂. The second separation step includes the second heat exchanger and CO₂ stripper in which the flow of liquid CO₂ from the first separation step is supplied into the CO₂ stripper directly and CO₂ flow from the first separation step is supplied into the CO₂ stripper through the second heat exchanger. Liquid CO₂ in the stripper is boiled by the reboiler and from the top part of CO₂ stripper flue gas is separated, expanded in the pressure control valve and is used in separation steps for cooling. Also liquid CO₂ from the reboiler and CO₂ stripper is collected in the buffer drum.

EFFECT: increase of purity of liquefied CO₂ without increase of power consumption.

12 cl, 5 dwg, 1 tbl