What is an air separation unit

1) The station can only be built after the review and approval of relevant departments according to the regulations on the safety management of chemical dangerous materials and the regulations on the safety supervision of gas cylinders issued by the State Council; 2) filling station should go through the registration formalities of Boiler and Pressure Vessel Safety Supervision Agency of Labor Department, and can only be engaged in gas filling work after passing the on-site examination; 3) the production devices, buildings and safety facilities of the filling station must conform to the provisions of fire prevention, explosion prevention and environmental protection; 4) the filling station must establish a management system to ensure the quality and safety of the filling station, such as safety education, training, fire prevention and explosion prevention, storage and transportation, equipment maintenance and other systems, and have the relevant standards, specifications and other te...

As we know, in order to ensure self-cleaning of all low-voltage air separation plant, the temperature difference of cold end of switching heat exchanger must be controlled within the allowable range of temperature difference to ensure self-cleaning. The self-clearing temperature difference of the cold end is the temperature difference between the positive air passing through the section of the cold end and the return air passing through this section. In normal operation, the measured temperature difference at the cold end is self-cleaning temperature difference. However, in the start-up stage of the air separation unit, the temperature of the switching heat exchanger decreases continuously with time, and the self-clearing temperature difference of the temperature of the positive return flow through the channel is far greater than the measured temperature difference of the cold end. In addition, with the extension of switching time and the acceleration of temperature drop, the temper...