The non-adiabatic distillation column 1 uses the circulating working fluid to indirectly cool the fluid in the concentrating section 2 and the first and second cooling devices 11 and 12 and the circulating working fluid to remove the fluid in the recovery section 3 from each other. The first cooling device on the first circulation path P11 to P14 between the first and second heating devices 21 and 22 for indirectly heating and the first cooling device 11 and the first heating device 21. From the second cooling device 12 on the second circulation paths P21 to P24 between the first compressor 31 for compressing the working fluid from 11 and the second cooling device 12 and the second heating device 22. Second compressor 32 for compressing the working fluid of No. 1, a first expansion device 41 for expanding the working fluid from the first heating device 21 on the first circulation paths P11 to P14, and a second circulation path A second expansion device 42 for expanding the working fluid from the second heating device 22 on P21 to P24.
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