Liquefied air separation FAQ

What are the types of adsorbers used in the purification system of air separation equipment?

What is the structure of the molecular sieve adsorber in the air separation equipment?

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...

During the operation of small air separation equipment, the reasons why the liquid enters into the heat exchanger are: 1) during the start-up stage, the valve of the distillation column is closed and the pressure-reducing speed is too slow, and the liquid oxygen level is too full, which makes the liquid enter into the heat exchanger. The symbol at this time is that the pointer of the pressure gauge of the upper tower fluctuates, the oxygen flow meter beats badly, and the temperature of T3 drops, with which the high and middle pressure automatically drops. When encountering this situation, the valve can be shut down and the pressure-down speed can be increased appropriately, and the large section-1 valve can be opened to increase the air flow through the second heat exchanger. And part of liquid oxygen can be discharged properly. When closing the small air, liquid nitrogen throttle or lowering pressure, it is normal for medium pressure to slightly rise (about 0.05MPa rise every 1 hou...

What are the common methods for air separation equipment to remove some impurities from the air?

What are the hazards of cavitation in centrifugal liquid oxygen pumps of air separation equipment?

What is the cooling capacity of the expansion mechanism of air separation equipment

Air separation equipment to adjust the distillation conditions affect the oxygen production of the factors are

How to shorten the cold start-up time of the air separation equipment in the molecular sieve purification process?

What safety issues should be noted when using the liquid oxygen storage tank of the air separation equipment?

What should be paid attention to when selecting degreasers for air separation equipment pipelines and equipment

Liquid air and liquid nitrogen supercooler uses nitrogen as cold source to cool liquid air or liquid nitrogen. There are Pipe type and plate type cooling device. When leakage occurs, it will affect the normal operation of the distillation column. It can be divided into two situations: 1) liquid air and liquid nitrogen leak to the nitrogen side. Since the liquid air leaks to the nitrogen side, it will be further recovered in the heat exchanger, so the increase of cold loss is not obvious, but the temperature at the cold end is Ding. Will drop, the cold end is too cold. If it is liquid leakage, because of the low concentration of nitrogen in liquid, the leak into the gas nitrogen will make the purity of gas nitrogen decline. After the leakage of liquid, the amount of liquid going into the tower will decrease and the recirculation fluid will decrease, which will worsen the rectifying working condition and decrease the oxygen output. In severe cases, the distillation tower will not work...