Air separation parts FAQ

How to judge whether the cooling capacity of the oxygen generator in the air separation equipment is sufficient?

Centrifugal compressor is widely used in petrochemical, metallurgy and other industries because of its large exhaust volume, high operating efficiency, simple structure, small area coverage, stable operation and no pulsation of compressed air.

Users equipped with piston compressors often encounter the phenomenon of pipeline displacement, support deformation and severe noise caused by pipeline vibration, which has a negative impact on safety production. Therefore, it has great significance to thoroughly solve the vibration problem of the pipeline of the piston compressor to ensure the safe production of the air separation plant.

What is the working principle of the air cooling tower in the air separation equipment?

What are the core functions and structures of the air cooling tower in air separation equipment?

According to a DEAR air separation user, during the operation of a set of air separation plant that has been in operation for 5 years, it is found that under the condition that the inlet guide vane does not change, the expansion air volume of the expander gradually decreases, and the rotation speed of the expander gradually decreases, the outlet pressure of the booster end of the expander rises from 0.76MPa to 0.8MPa, the inlet temperature rises from - 110 ° C to - 95 ° C, and the working condition of the chilled water pump is poor.

The liquid oxygen pump is a kind of low temperature liquid pump. It is used as the liquid oxygen circulating pump in the main condensing evaporator in the internal compressed air separation process to increase the pressure of liquid oxygen and output liquid oxygen.

What are the main cooling methods of air separation equipment?

The deflagration of the oxygen compressor will cause great harm to the safe operation of the air separation equipment and the personal safety of the operators. Each air separation user should attach great importance to the safe operation of the oxygen compressor to prevent the occurrence of the deflagration accident.

In the temperature of the forward air into the cooler (hot end temperature, related to the cooling effect of the last cooler of the air compressor or nitrogen water precooler) and the temperature of the return air into the cooler (cold end temperature, under the condition that the temperature of the heat exchanger such as the outlet supercooler and the liquid purifier is not changed, the temperature difference between the thermal end and the temperature difference between the cold end of the refrigerator (both refers to the difference between the temperature of the forward air and the reflow gas participating in the switching) is interdependent. If the hot end temperature difference, cold end temperature difference will is too small; the hot end temperature difference is too small, cold end temperature difference will is too large. This is decided by the cooling balance of the positive and return gas of the cooler. When the ratio of return flow to positive flow volume is larger than...

The temperature condition adjustment of the cooler (or switching heat exchanger) is based on the central temperature. The "middle" mentioned here does not refer to the central position of geometric dimension, but refers to the temperature on the barrel (or switching channel) near the central air extraction or the outlet of circulation. It is also related to the location where the thermometer is installed. The purpose of temperature condition adjustment is to keep the temperature difference between cold end and hot end within the specified range. Then, why should the temperature in the middle prevail? We need to take a look at the relationship between the temperature of the middle part and the temperature difference of the cold end and the temperature difference of the hot end, and what rules the temperature changes along the height direction of the cooler (or the switching heat exchanger) follow. The temperature condition change of the cooler (or switching heat exchanger) is general...

The start-up phase of the whole low-pressure oxygen generator is that liquid empty appears first in the lower tower, and then liquid oxygen appears in the upper tower. The cold energy needed to accumulate liquid in the tower mainly comes from the expansion machine, which uses the low temperature gas after expansion to make part of the air liquefaction in the liquid purifier. But the upper tower itself can not produce liquid, it mainly depends on the liquid from the lower tower into the upper tower. In the phase of hydrops, in order to accumulate the liquid level as soon as possible, the cooling volume should be transferred to the tower as much as possible, the phenomena of overcooling, temperature difference at the hot end and cold loss increase caused by excess cooling of switching heat exchanger should be avoided. As for how to recycle and transfer the cold volume of the air expansion into the tower, whether it is by the liquid purifier to transfer the cold volume to the lower tow...