In the production and operation of the low-temperature methanol washing device,the hydrogen sulfide concentration tower mainly uses nitrogen as the gas stripping medium.The nitrogen comes from the pipeline with a pressure of about 0.51 MPa,and enters the lower part of the hydrogen sulfide concentration tower after being depressurized by the flow control valve.The operating pressure of the hydrogen sulfide concentration tower is 0.19～0.21 MPa.During the pressure reduction process of low-pressure nitrogen through the regulating valve,there is energy that has not been recovered.By adding a nitrogen expander and regulating valve group for mutual backup,the energy generated by the pressure change of low-pressure nitrogen is used to drive the gas expander to operate and generate electricity,achieving the goal of comprehensive energy recovery and utilization,and achieving good economic benefits.
NETL
NSTL
万方数据
