Why is the pressure in the lower tower of the air separation equipment higher than that in the upper tower?

How to determine whether the molecular sieve purifier of the air separation equipment is working properly based on the adsorption temperature curve?

When operating the molecular sieve purification system: pay attention to the installation requirements of the molecular sieve absorber, when the molecular sieve absorber is running, when the working state of the refrigerator, when the air compressor starts, when thesmall air separation unit is parked, pay attention to the working state of each piece of equipment. 1...