Deeply-desorbing and cold energy regenerating device for low-temperature methanol washing process

The utility model provides a deeply-desorbing and cold energy regenerating device for a low-temperature methanol washing process. The device comprises a hydrogen sulfide concentrating tower, wherein the liquid outlet of the hydrogen sulfide concentrating tower is communicated with a liquid inlet in the top end of a gas stripping tower, an air inlet in the bottom end of the gas stripping tower is communicated with a nitrogen pipe, and the liquid outlet of the gas stripping tower is connected to the liquid inlet of a thermal regeneration tower. The device has the advantages that a methanol-rich solution is completely regenerated through the gas stripping principle of the gas stripping tower and the thermal regeneration principle of the thermal regeneration tower so as to achieve the purpose of cyclic utilization; meanwhile, a three-stage heat exchanger is used for heat exchange, the regeneration capacity of the low-temperature methanol wash is improved, cold energy contained in low-temperature methanol wash ric