| 摘要 |
A method for extracting from gases of combustion and flue gases which have boiling points beneath -160 DEG C at least one contaminating other gas which has a boiling point within the range -140 to 25 DEG C. The combustion gas and the flue gas are cooled with the aid of at least one gas stream in a cryogenerator which functions in accordance with an expansion process. The gas stream has a temperature which is sufficiently low to condense the contaminating gas. The contaminating gas is then collected for possible further treatment. An arrangement for carrying out the method includes an air-seperation apparatus and at least one heat-exchanger (160A or 160B) for cooling the combustion gas and the flue gas in the apparatus with the aid of cold gas flows. The arrangement also includes a conduit (165) for delivering combustion gas and flue gas to the heat-exchanger or exchangers (160A, 160B), cooling gas delivery conductors (140, 170), a conductor (180) for discharging purified gas, and a conductor (185) for discharging condensed contaminated gases. |
