Carbon dioxide rectification reduces discharging device

The utility model relates to a carbon dioxide rectification reduces discharging device, including the carbon dioxide rectifying column, set up a plurality of condensing evaporator freezing with hocket in carbon dioxide rectifying column top of the tower and compound heat, condensing evaporator's air inlet is connected through the air bleeding valve with the exhaust outlet of carbon dioxide rectifying column top of the tower, condensing evaporator's gas outlet is provided with the cooling respectively and freezes required cold source endless cold source route and supply to heat up again required heat source endless heat source route through the air outlet valve and form the discharge port among the condensing evaporator. Condensing evaporator is the heat exchanger of plate heat exchanger or area filler. It forms the heat source route to be connected to condensing evaporator at the bottom of the carbon dioxide rectification tata to regard the liquid carbon dioxide at the bottom of the carbon dioxide rectification tata as the heat source. The utility model discloses a device can make that carbon dioxide's concentration reduces in the waste gas that the rectifying column discharged surely, and cost and energy consumption are lower, has reached comprehensive use of resources's purpose.