CO in a kind of embrane method desorption alcohol amine absorbent rich solution2Method

The invention discloses a kind of embrane method to desorb CO in alcohol amine absorbent rich solution 2 Method, including step is as follows：(1) content is determined：Measure absorbs CO 2 Hydramine afterwards absorbs rich solution concentration of absorbing, CO 2 Content；(2) rich solution is desorbed：Absorbing liquid in rich solution reservoir is heated to desorption temperature, rich solution is absorbed and is pressurizeed through liquid pump, being passed through membrane desorption device after the specific flow velocity of fluid flowmeter control is desorbed, and is absorbed rich solution level and is flowed through tube side, shell side is evacuated to negative pressure 50kPa with vavuum pump and is equipped with N 2 Purging, absorbing liquid and purge gass reverse flow；(3) lean solution is stored：Desorption gained lean solution, which is collected to lean solution reservoir, lean solution, can be recycled.This method can make in rich solution more than 70% CO 2 Desorb, desorption effect is preferable, and whole membrane desorption technological operation is simple, and energy consumption is low.