Air separation parts FAQ - DEAR Air Separation

Common fault analysis of centrifugal cryogenic liquid pump

In the air separation unit, low-temperature liquid is transported by centrifugal cryogenic pump. In order to ensure the reliable operation of the equipment, two sets of low-temperature pumps are generally equipped, one for use and one for standby. During normal operation, the main pump runs at full load, and the standby pump is in standby state under low load operation. Since the working medium temperature of cryogenic liquid pump is about -180°C, the working pressure is very high, and the pump body is installed in the cold box. When the pump fails, it is extremely difficult to maintain. Therefore, how to maintain the stable and reliable operation of cryogenic liquid pump is of great significance.

Sep 03, 2025

What are the functions of heat exchangers in air separation equipment?

Aug 28, 2025

Analysis of the reasons of turbine expander operation efficiency decrease

Expander is a kind of equipment that uses the principle of mechanical work output when compressed gas expands and depressurizes to lower the temperature of gas. Expander is the key equipment to provide cooling capacity for air separation plant. The efficiency of expander directly affects the operation effect of air separation plant. The following introduces several factors that cause the efficiency reduction of expander.

Aug 20, 2025

What are the key technical components of an air separation unit?

Aug 12, 2025

What are the technical principles and functional characteristics of the AIPC in air separation equipment?

Aug 04, 2025

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

Jul 25, 2025

Reason analysis and eliminating method of centrifugal compressor surge

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.

Jul 17, 2025

Analysis of vibration causes of pipeline of piston compressor and measures for vibration reduction

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.

Jul 09, 2025

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

Jul 01, 2025

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

Jun 23, 2025

Treatment of cooler leakage after boosting of expander

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.

Jun 13, 2025

How to ensure the normal operation of liquid oxygen pump

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.

Jun 05, 2025