Purification technology for sulfur hexafluoride

A technology for sulfur hexafluoride and sulfur hexafluoride gas, which is applied in the field of purification technology and can solve the problems of unreasonable equipment structure, difficult process conditions, and inability to purify sulfur hexafluoride by sulfur hexafluoride.

Active Publication Date: 2013-02-13
四川众力氟业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, domestic sulfur hexafluoride products implement the GB / T 12022-2006 standard, which can only meet industrial needs (switches, circuit breakers, etc.), but cannot purify sulfur hexafluoride into electronic grade (>99.999) sulfur hexafluoride. Moreover, there are defects such as imperfect purification process, unreasonable equipment structure, and difficult control of process conditions in industrial production.

Method used

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Embodiment Construction

[0024] In order for those skilled in the art to better understand the technical solutions provided by the present invention, the following will be described in conjunction with specific embodiments.

[0025] The purification process of sulfur hexafluoride provided by the embodiment of the present invention includes a pressure swing adsorption step and a rectification step, wherein,

[0026] Described pressure swing adsorption step is:

[0027] Crude sulfur hexafluoride gas composition and composition: SF 6 ≥95%, moisture: 1%, N 2 +O 2 : 3%, others: 1%;

[0028] Crude sulfur hexafluoride gas is pressurized to 0.1~0.2Mpa by a booster pump; a large amount of water is removed through a low-pressure 1, 2, and 3-stage silica gel adsorption tower at room temperature, and the moisture content of the crude gas at the outlet of the 3-stage silica gel is <200ppm;

[0029] Enter the low-pressure 1st and 2nd-stage alumina adsorption tower, and the moisture content at the outlet of the ...

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Abstract

The invention discloses a purification technology for sulfur hexafluoride. The purification technology adopts a pressure swing adsorption step and a rectification step and can purify the sulfur hexafluoride into an electronic grade (more than 99.999) sulfur hexafluoride.

Description

technical field [0001] The invention relates to the field of purification technology, in particular to a purification technology of sulfur hexafluoride. Background technique [0002] Sulfur hexafluoride (SF 6 ) gas has a history of one hundred years. It is an artificial inert gas synthesized by two French chemists Moissan and Lebeau in 1900. Currently, sulfur hexafluoride gas is mainly used in the power industry. Sulfur hexafluoride gas is used in 4 types of electrical equipment as insulation and / or arc extinguishing; SF 6 Circuit breakers and GIS (here refers to sulfur hexafluoride closed combination electrical appliances, internationally known as "gas insulated switchgear" (Gas Insulated Switchgear)), SF 6 Load switchgear, SF 6 Insulated Transmission Lines, SF 6 Transformer and SF 6 Insulated substation. [0003] Crude sulfur hexafluoride gas, although purified, still has a small amount of water, low fluoride, N 2 , O 2 、CF 4 、O F 2 , CO 2 、C 2 f 6 Other impur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/45
Inventor 李小明刘静涛曹勇
Owner 四川众力氟业有限责任公司
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