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Method and equipment for recycling sulfur hexafluoride from power distribution unit

A technology of power distribution device and adsorption device, applied in the direction of sulfur and halogen compounds, reagents, educts, etc., to achieve the effects of strong practicability, pollution reduction, simple and practical methods and devices

Inactive Publication Date: 2004-03-10
QIANGEN GAS SCI TECH SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem in the prior art that the SF6 used in the power distribution device cannot be well recycled, and provide a method and device for reclaiming SF6 from the power distribution device

Method used

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  • Method and equipment for recycling sulfur hexafluoride from power distribution unit
  • Method and equipment for recycling sulfur hexafluoride from power distribution unit
  • Method and equipment for recycling sulfur hexafluoride from power distribution unit

Examples

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Embodiment 1

[0014] In the present embodiment, the method for reclaiming SF from power distribution device may further comprise the steps:

[0015] 1) Use an adsorption device to adsorb SF6 and the mixed gas containing its decomposition products in the power distribution device, so that the decomposition products of SF6 in the mixed gas are adsorbed to form a mixed gas with a reduced concentration of pure SF6 or SF6 decomposition products;

[0016] 2) carry out liquefaction treatment to the mixed gas obtained through step 1), to obtain liquid SF6;

[0017] 3) make the liquid SF that step 2) obtains evaporate to obtain pure SF gas.

[0018] like figure 1 As shown, in this embodiment, the device for recovering SF6 from the power distribution device includes a cleaning filter 1 , a compressor 3 and a water storage tank 4 .

[0019] The cleaning filter 1 is provided with an air inlet pipe 2, and is connected to an external power distribution device 5 with a mixed gas containing SF6 as an ins...

Embodiment 2

[0023] In this embodiment, the method for recovering SF6 from the power distribution device differs from that in Embodiment 1 in that before step 2), the mixed gas is separated by a diaphragm device. A polymer membrane can be used in the diaphragm device, and N2 in the mixed gas can pass through the polymer membrane, but SF6 cannot, so that the N2 in the mixed gas can be removed.

[0024] like figure 2 As shown, the device for implementing the inventive method includes a cleaning filter 1, a first compressor 7, a membrane device 8, a second compressor 9, a distiller 10 and a mixer 11 connected in sequence through pipelines. The cleaning filter 1 has an air inlet pipe 2, and is connected to an external power distribution device 5 with a mixed gas containing SF6 as an insulating medium through the air inlet pipe 2, and the mixer 11 is connected to the power distribution device through a recovery pipe 12 5 connected.

[0025] The working process of the device of the present in...

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Abstract

A process for recovering SF6 from electric distribution equipment includes adsorbing the gas mixture containing SF6 in said electric distribution equipment, liquefying the gas mixture to obtain liquefied SF6, and evaporating it to obtain high-purity SF6 gas. Its apparatus is composed of washing filter, compressor, and water pool, which are serially communicated.

Description

technical field [0001] The invention relates to a gas recovery method and device, in particular to a method and device for recovering sulfur hexafluoride (SF6) from a power distribution device. Background technique [0002] SF6 (Sulfur hexafluoride) as an insulating or non-conducting gas is widely used in the power distribution industry, especially in power distribution devices such as transformers, transfer switches, gas insulated wires and substations. Under high pressure, SF6 will decompose into various polar components such as HF, F+ and SO2. These components will weaken the insulating properties of the insulating gas, therefore, the insulating gas must be replaced regularly. In terms of technology and environmental protection, in recent years, the mixed gas of SF6 and nitrogen (N2) or SF6 and air has been used instead of pure SF6 gas in power distribution devices. In the prior art, these gases cannot be recycled after each use, which also increases the maintenance cos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04C01B17/45
CPCY02P20/151
Inventor 李跃恩李跃强
Owner QIANGEN GAS SCI TECH SHANGHAI
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