Solvent desorption energy-saving process and device

The solvent desorption energy-saving process comprises a desorption bed, a cold and hot heat exchanger, a heater, a condenser, a condensation straight-through valve, a circulating air proportional valve, a condensation air energy-saving air return valve and the like, and is characterized in that partial or all desorption gas media are selected according to the temperature concentration of desorbed gas, and return to a heating device for heating without condensation circulation; and the high-concentration gas to be desorbed enters a condensation recovery device when the temperature concentration of the outlet is higher, so that the high-concentration gas to be desorbed is partially supersaturated in the normal-temperature water heat exchanger and is released, the energy consumption of low-temperature condensation is reduced, and the energy consumption of desorption by direct heating of hot air is lower. 一种溶剂脱附节能工艺和装置，包括脱附床、冷热热交换器、加热器、冷凝器、冷凝直通阀门、循环风比例阀门、冷凝风节能回风阀门等，其特征是根据脱附出来气体的温度浓度，选择部分或全部脱附气体介质，不经过冷凝循环回到加热装置加热