Environment-friendly separating and recovering device and method of sulfur hexafluoride/nitrogen mixed gas

Abstract

The invention discloses an environment-friendly separating and recovering device of sulfur hexafluoride / nitrogen mixed gas. The environmental-friendly separating and recovering device is characterized by comprising a pressure monitoring module, a three-way conversion valve, a straight-through valve group, a pressure increasing valve group, a high vacuum valve group, a chemical treating device, a mixed-gas separating device and a compression and recovery device, wherein a sulfur hexafluoride / nitrogen mixed gas chamber is connected with an inlet of the three-way conversion valve by the pressure monitoring module; a first outlet of the three-way conversion valve is connected with an inlet of the mixed-gas separating device by the pressure increasing valve group; a second outlet of the three-way conversion valve is connected with an inlet of the mixed-gas separating device by the straight-through valve group; a third outlet of the three-way conversion valve is connected with an inlet of the mixed-gas separating device by the high vacuum valve group; and an outlet of the mixed-gas separating device is connected with the chemical treating device and the compression and recovery device in sequence. The environment-friendly separating and recovering device disclosed by the invention has the advantages that no leakage is caused in the whole separation and recovery process, and SF6 gas can be recovered and reused, so that not only can the environment-friendly requirement be met, but also the production cost can be reduced.

Description

technical field [0001] The invention belongs to the technical field of gas recovery, in particular to an environment-friendly separation and recovery device and method for sulfur hexafluoride / nitrogen mixed gas. Background technique [0002] SF 6 Due to its excellent insulation and arc extinguishing properties, the gas is the only insulating gas that has been applied in industry so far. It has been widely used in circuit breakers, fully enclosed combined electrical appliances (GIS), power transformers, DC transmission reversing valves and current transformers, etc. in the device. However, SF 6 The gas is a strong greenhouse gas with a global warming coefficient of approximately carbon dioxide (CO 2 ) 23,900 times, once leaked, it will cause long-term and continuous pollution to the environment. 6 The restrictions on the use of gas are becoming more and more stringent, and its replacement and reduction are the general trend. [0003] in SF 6 N 2 , CO 2 Or ordinary gas...

AI Technical Summary

Problems solved by technology

The separation and recovery effect of mixed gas not only affects the generation and operation cost of power equipment, but also directly affects the environment. Once leakage occurs during the separation and recovery process, it will have a long-term and continuous impact on the environment

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