Treatment for blockage in Air Liquide subcooler
Thread Content
The 20,000 cubic meter per hour air separation unit stopped operating for maintenance after a rupture occurred in the nitrogen pipeline leading from the lower column to the argon purification column; upon restart, high resistance was observed in the channel leading from the liquid oxygen product to the upper column, resulting in only 10,000 cubic meters per hour of oxygen output. Could all students help analyze the reasons and solutions? This device had been out of use for a year before being turned on, and was kept under nitrogen atmosphere at all times.
After treatment, was any accumulated pearlescent sand found at the bottom of the tower?
May I ask, what are the tasks involved in the shutdown for maintenance? Was the cracked pipe simply repaired? Has the tower been checked? Inspect the pipelines/equipment connected to this liquid nitrogen line, that is, the areas where sand may enter.
After the pressure nitrogen is throttled, it goes into the liquid nitrogen buffer tube, right? It doesn’t go down into the lower tower. Are there any other leak points that haven’t been detected yet?~~