METHOD AND DEVICE FOR LIQUEFYING FURNACE GAS FROM COMBUSTION DEVICES Russian patent published in 2015 - IPC F25J3/06 

FIELD: chemistry.

SUBSTANCE: invention relates a method of producing CO₂ from furnace gas. Furnace gas is partially condensed in two separation stages. Each separation stage is cooled using an expanded waste gas and expanded liquid CO₂. The expanded CO₂ is split after passing through the last separation stage into liquid CO₂ and gaseous CO₂ in an additional separation drum. The gaseous CO₂ and part of the liquid CO₂ from the additional separation drum is expanded to a first pressure level, and the pressure of the remaining liquid CO₂ is raised to a second pressure level, followed by expansion to cool the CO₂ in the last separation stage.

EFFECT: low energy consumption.

11 cl, 2 dwg, 1 tbl