Rectification system capable of recycling heat energy

The utility model discloses a rectification system capable of recycling heat energy. The rectification system comprises a rectification tower, a falling film heat exchanger, a steam-water separator and a compressor system which form a loop, the falling film heat exchanger shell pass is used for conducting heat exchange on gas-phase materials output from the rectifying tower, the falling film heat exchanger tube pass heats circulating hot water and then conveys the circulating hot water to the steam-water separator, and the steam-water separator conducts steam-liquid separation on steam and water; steam separated by the steam-water separator is conveyed to the compressor system; the compressor system is used for compressing input low-grade steam and then increasing the temperature and pressure to the steam pressure capable of meeting recycling. And the steam output by the compressor is used as a heat source of a rectification system or used for other purposes. According to the utility model, the compressor is