Recovery and purification of SF6
The impurity and concentration of six sulfur fluoride (SF6) gas in high-voltage switch are affected by many factors such as running time, breaking times, micro water content and new gas impurities. SF6 gas has been running for a long time in the equipment, and will produce some toxic decomposition products under the action of moisture and arc. The recognized gaseous products mainly include HF, SO2, SOF2, SO2F2, SF4, H2S, etc. the solid decomposed products are SiF4, AlF3, CuF2d, etc. If the gas is directly discharged, it will cause serious pollution of the surrounding environment. Therefore, we must recycle and purify the waste six sulfur hexafluoride gas in order to reuse it.
The SF6 exhaust gas from the pullback plant is reproduced in a six sulfur fluoride gas production system. After a series of purification processes, such as pyrolysis, dust removal, water washing, alkali washing, adsorption and low temperature distillation, it will be thoroughly purified to meet the requirements of the new gas standard.
