Argon enrichment in small air separation units

The principle of expander with motor brake in air separation plant is to control the speed of expander by braking torque generated by motor generator braking state. Once the brake motor fails, the expander speed will lose control and overspeed will occur. At this time, it is necessary to automatically open the protection and control system. The principle is that the speed measuring motor will send out the overspeed signal to cut off the three-way solenoid valve. The three-way solenoid valve directly controls the air open pneumatic butterfly valve at the inlet of the expander, so that the butterfly valve is quickly closed and the air inlet is cut off. At the same time, the rotation of the valve rod touches the stop and limit switch, so that the power supply of the expander motor is cut off and the safe shutdown is realized.

Small air separation unit material production process should reduce grease and debris pollution and reduce the amount of subsequent processing works and processing difficulties. Small air separation unit material section in the factory before, transport and storage process using the adoption of strict closed measures to prevent secondary pollution. Specific measures are: Store small parts in pockets: Close the openings of the small air separation unit : Nitrogen sealing or drying and other metho...