The invention relates to the field of
heavy water production, and discloses a compression cycle
heat supply heavy water rectification process which comprises the following steps: 1, carrying out primary rectification on feed water; 2, condensing
tower top steam by a first-stage cooler to obtain
tower top produced liquid, enabling one part of the produced liquid to flow back to a first-stage rectifying
tower, discharging the other part of the produced liquid, pressurizing and heating a working medium heated by the first-stage cooler by a compressor, and feeding the working medium into a first-stage
reboiler; 3, feeding one part of
deuterium-enriched water of the tower kettle into a first-stage
reboiler, boiling, returning to the bottom of the rectifying tower, taking the rest part as feed water for next-stage rectification, and returning a working medium cooled by the first-stage
reboiler into a first-stage cooler through a first-stage expansion valve to be heated and evaporated; and 4, performing N-stage rectification and purification until the
heavy water meets the purity requirement. By utilizing the characteristics that the boiling difference between water and heavy water is extremely small and the condensation heat of the tower kettle is equivalent to the heat source required by the tower kettle, the condensation heat of tower top steam is transferred to the tower kettle through the circulating working medium, the
energy consumption is greatly reduced, and a large amount of heat sources can be provided for the
system by a small amount of
power consumption of the compressor.