Basic knowledge of cryogenic liquid pump

Feb 08, 2020

Cryogenic liquid pump (hereinafter referred to as cryogenic pump) is a special pump used to transport cryogenic liquid (such as liquid oxygen, liquid nitrogen, liquid argon, liquid hydrocarbon and liquefied natural gas) in petroleum, air separation and chemical plants.

The utility model is used for conveying low-temperature liquid from places with low pressure to places with high pressure. With the development of air separation technology, cryogenic liquid has been widely used and developed. Its only function in the air separation equipment is: for liquid circulation; or to extract liquid from the storage tank and press it into the vaporizer, and send it to the user after vaporization.

As the medium delivered by the cryogenic liquid pump is cryogenic liquid, it should be kept at a low temperature during the process of medium delivery. Once more heat is absorbed from the pump, the cryogenic liquid in the pump will vaporize in a large amount and generate gas, thus affecting the operation of the pump. Therefore, the low temperature pump has its special requirements in structure, material, installation and operation to meet the requirements of low temperature liquid transportation.

According to different working principles, cryogenic pumps are mainly divided into reciprocating and centrifugal type.