Carbon dioxide trapping energy-saving separation system

The utility model provides an energy-saving separation system for carbon dioxide capture, which belongs to the technical field of carbon dioxide capture, and comprises an absorption tower, a regeneration tower and a reboiler, the regeneration tower is provided with a crude gas exhaust port, the crude gas exhaust port is communicated with a spray tower, the spray tower is suitable for containing spray liquid, the spray tower is also provided with a spray pipeline, and the spray pipeline is communicated with the absorption tower. One end of the spraying pipeline leads to the interior of tower bottom spraying liquid of the spraying tower, the other end of the spraying pipeline leads to the interior of a tower top inner cavity of the spraying tower, and a spraying device is arranged on an outlet of one end, leading to the tower top inner cavity of the spraying tower, of the spraying pipeline; according to the carbon dioxide capture energy-saving separation system, the rear end of the crude gas exhaust port of the