| 摘要 |
A method and device for cooling and/or purifying a process gas, in which the process gas is precooled in a precooler by indirect heat exchange with a second coolant stream, and then cooled in a deep-freeze unit in indirect heat exchange with a first coolant stream. The first process stream is generated by vaporizing a condensed gas. At least one part of the first coolant stream leaving the deep-freeze unit is sent as at least part of the second coolant stream to the precooler, and at least another part of the first coolant stream leaving the deep-freeze unit is used with at least one part of the second coolant stream leaving the precooler to vaporize the condensed gas is vaporized and is vaporized. The part of the first coolant stream used to vaporize the condensed gas may be the part leaving the deep-freeze sent to the precooler.
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