Method for producing pure argon from waste argon

A technology of argon and pure argon, which is applied in refrigeration, liquefaction, liquefaction, solidification, etc., can solve the problems of limited production capacity and large investment of air separation units, and achieve simple and effective processes, efficient processes, and lower production thresholds Effect

Active Publication Date: 2012-06-20
ZHEJIANG XIN RUI AIR SEPARATION PLANT CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

But it must rely on a large air separation unit, the investment is very

Method used

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  • Method for producing pure argon from waste argon
  • Method for producing pure argon from waste argon
  • Method for producing pure argon from waste argon

Examples

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Embodiment

[0030] a. The pressurized waste argon gas discharged from the user equipment is introduced into the purification equipment through the No. 1 pipeline, and the reheated backflow waste argon gas is combined and then enters the first section TC1 of the booster through the No. 7 pipeline to increase the gas pressure, and passes through the No. 1 pipeline Cooled by a water cooler 30; the cooled output gas is divided into two paths, one path enters the second section of the supercharger TC2 to continue boosting, the second water cooler 31 cools, and then enters the expander in turn through the No. 8 pipeline. The pressure end BT pressurizes, the third water cooler 32 cools, and then passes through No. 10 pipeline to the main heat exchanger E1 to release heat. The cooled waste argon gas enters the expansion end ET of the expander to push the rotor to do work, and returns after cooling down. The main heat exchanger absorbs heat, and after reheating to normal temperature, it enters the ...

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Abstract

The invention relates to a method for producing pure argon. The aim of the invention comprises that the method has the characteristics of less investment and high yield of pure argon product. The invention adopts the technical scheme that the method for producing the pure argon from the waste argon comprises the following operations: a, compressed waste argon is converged, reheated and refluxed and then is divided into two paths by virtue of pressurizing and cooling, wherein one path pushes a rotor of an expansion machine to do work and then continuously circulate; after the other path releases heat, one waste argon stream is pumped out and is introduced into a first rectifying tower evaporator to be converted into waste liquid argon, and another waste argon stream is converted into the waste liquid argon and then is fed into a first rectifying tower to be rectified; b, the waste liquid argon output by the first rectifying tower is divided into two paths, and the two paths are respectively fed into a second rectifying tower and a main heat exchanger to release cold capacity and continuously circulate; and c, the waste liquid argon fed into the first rectifying tower releases the cold capacity, wherein partial gas is discharged in liquid state, the rest gas is fed into the second rectifying tower to absorb the cold capacity; and partial gas is discharged in a gas state, and residual gas absorbs the cold capacity and then is output as a liquid pure argon product.

Description

technical field [0001] The invention relates to an air separation method, in particular to a method for preparing pure argon from waste argon. Background technique [0002] Argon exists in nature, and the content of argon in the atmosphere is about 0.9%. People use various techniques to separate and purify it from compounds or mixtures to obtain high-purity argon (≥99.999% v / v using the term in GB / T10624-1995). The earliest use of argon is to fill the bulb with gas. Now it is widely used in welding and cutting metal, electronics, medicine and other industries, and is also widely used in industrial production as a protective gas. At present, the industrial mass production of pure argon mainly realizes the preparation and purification of argon through the following three methods: (1) potassium-40 decay method; (2) adsorption + chemical method; (3) cryogenic distillation method. Wherein: (1) and (2) the processes of the two methods are gaseous argon processes, and the final p...

Claims

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Application Information

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IPC IPC(8): F25J3/08
Inventor 孙国华张敏沈浩
Owner ZHEJIANG XIN RUI AIR SEPARATION PLANT CO LTD
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