Due to the large investment of large coal chemical air separation unit, no unit can use standby machine to ensure safe and stable operation, which puts forward strict requirements for the reliability and backup system of air separation unit. In order to realize the "safe, stable, long-term, full and excellent" operation of the whole process of coal chemical industry, each unit and each component should be reliable. Once a fault occurs, it is necessary to respond quickly to ensure the safety of production.
