Argon recycling method and system based on air separation system

Abstract

The invention relates to an argon recycling method and system in order to solve the technical problems that during liquid argon loss recycling of an existing air separation system, a liquid argon storage tank is emptied, liquid argon is led to a pure argon condenser to be recycled, a cold box perlite withdrawal pipeline possibly needs to be opened, operation is complex, a great deal of hydraulic nitrogen needs to be consumed if a small heat exchanger is additionally arranged on the lower portion of the liquid argon storage tank, and liquid in argon cooling pump liquid and tank car decompressedargon cannot be recycled through the two methods. According to the argon recycling method and system based on an air separation system, provided by the invention, argon in an emptying pipeline of theargon storage tank, a tank car air pipeline and a refilling vehicle gas discharge pipeline conducts heat exchange in a water bath vaporizer, is stored in an argon buffer tank, is compressed through an argon compressor and then is fed into an argon gas pipe network. Moreover, through arrangement of a series of interlocking control, the stability of the argon recycling system and the emptying safety of the storage tank are guaranteed, and the recycling method can be realized through the recycling system.

Description

Technical field [0001] The present invention relates to an argon gas recovery method and system, and specifically provides an argon gas recovery method and system based on an air separation system. Background technique [0002] The volume of the liquid argon storage tank in the air separation system is generally large, and the low-temperature liquid inside is constantly evaporating. In order to ensure the safety of its storage, a gas vent pipe will be set up during the design to have a certain pressure relief channel to maintain the liquid storage tank at Safe pressure range. Due to the large volume of the hydraulic storage tank, if this part of argon gas can be considered to be recovered, considerable profits will be added. In addition, for the entire air separation system, the cold pump loss during the liquid argon filling process is also a considerable part of the waste of liquid argon, including the vented argon gas from the pressure relief of the liquid argon tanker. ...

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problem that the liquid argon is vented and led to the refined argon condenser for recycling in the existing air separation system. The method of small heat exchanger needs to consume a large amount of liquid nitrogen, and the two methods cannot recover the liquid argon cooling pump liquid and the technical problem of tank car depressurization argon gas. An argon gas recovery method and system based on an air separation system is provided.

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