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Recovery and purification device for low-concentration helium

A low-concentration, helium technology, used in inert gas compounds, inorganic chemistry, non-metallic elements, etc., can solve the problems of low gas purity, low purification efficiency, and high energy consumption, and achieve high gas purity, high purification efficiency, and energy efficiency. low consumption effect

Pending Publication Date: 2021-08-13
安徽中科皖能科技有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] At present, the recovery and purification of low-concentration helium with a content of 10-50% has disadvantages such as low purification efficiency, low purity of purified gas, and high energy consumption.

Method used

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  • Recovery and purification device for low-concentration helium

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Embodiment 1

[0036] A method for recovering and purifying low-concentration helium, comprising the following steps:

[0037] The raw material helium enters the membrane separator 2 under the action of the recovery fan 1 for preliminary separation of low-concentration raw material helium, and obtains more than 90% crude helium; the obtained crude helium enters the compressor 3, and the compressor 3 increases the crude helium After being compressed, it enters the heat exchanger 4, and the crude helium continues to enter the vacuum temperature swing adsorption device, and the crude helium is adsorbed and purified by the adsorption tower to obtain 99.99% to 99.999% pure helium, and the pure helium flows through the heat exchanger 4 Heat exchange with the crude helium flow to fully recover the cooling capacity carried by the pure helium flow flowing out of the vacuum temperature swing adsorption device and fully cool the crude helium flow, so that the cooling capacity can be fully utilized and p...

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Abstract

The invention discloses a recovery and purification device for low-concentration helium. The recovery and purification device comprises a recovery fan, a membrane separator, a compressor, a heat exchanger and a vacuum temperature swing adsorption device; THE inlet of the recovery fan is connected with raw material helium, the outlet of the recovery fan is connected with the inlet of the membrane separator, the outlet of the membrane separator is connected with the inlet of the compressor, the outlet of the compressor is connected with the heat exchanger, crude helium in the compressor enters the vacuum temperature swing adsorption device through the heat exchanger and is purified to obtain pure helium, and the pure helium is discharged after being subjected to countercurrent flow heat exchange with the crude helium in the heat exchanger. The recovery and purification device for low-concentration helium has the characteristics of high purification efficiency, high purity of purified gas, low energy consumption and the like, and is suitable for small-flow application scenes. And meanwhile, the device can be used for purifying hydrogen, neon and the like, and has universality.

Description

technical field [0001] The invention relates to a recovery and purification device for low-concentration helium, belonging to the technical field of gas separation. Background technique [0002] Helium is a colorless and odorless inert gas, which is widely used in many industrial fields such as optical fiber manufacturing, semiconductor production, metal manufacturing, welding and leak detection. Although helium has a wide range of uses and a large amount of use, its sources are limited and it is a scarce strategic resource. The helium content in the air is about 5ppm, which basically has no extraction value. At present, it mainly comes from the recovery of associated gas in natural gas exploitation. Scarce resources, it is very meaningful to carry out recycling. [0003] At present, the recovery and purification of low-concentration helium with a content of 10-50% has disadvantages such as low purification efficiency, low purity of the purified gas, and high energy consum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B23/00
CPCC01B23/0042C01B23/0078
Inventor 郭会军
Owner 安徽中科皖能科技有限公司
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