Cause of low purity of six sulfur fluoride gas
If the purity of the six sulfur fluoride is low, the insulation strength of the gas will be greatly reduced, and it is easy to be used in electrical insulation by high voltage breakdown and cause accidents. So what's the reason for the purity of the gas?
(1) it is known that at present, the method of producing six sulfur fluoride gas in the chemical industry is mainly by the direct combination of sulphur and excess gaseous fluorine. There are many impurities in synthetic crude products. The composition and content of impurities vary greatly due to the purity of raw materials, the material and technological conditions of production equipment, and the total content of impurities can reach 5%.
In addition, a small amount of air, water, mineral oil and other impurities can be mixed into the process of gas filling. These impurities all have or will produce certain toxic substances.
(2) some toxic products produced by the SF6 gas in the electrical equipment when the high temperature arc occurs.
(3) the chemical reactions between the six sulfur fluoride decomposer in the electrical equipment and the water in the apparatus produce certain toxic products.
(4) some toxic products are produced by the reaction of SF6 gas and decomposable in electrical equipment with the electrode (Cu-W alloy) and metal material (AL, Cu).
(5) some toxic products are produced by the reaction of the SF6 gas and the decomposed substance in the electrical equipment with the insulating material. As with the epoxy phenolic glass cloth plate containing silicon components (rod) and other insulation parts, or with quartz sand, glass filled epoxy resin casting, molding, porcelain, silicone rubber, silicone grease and other chemical reaction, the formation of SiF4 and Si (CH3) 2F2 products.
The above products of high - temperature decomposition of high - purity six sulfur fluoride can cause the problem of purity of gas. In addition, the gas in the equipment should also be constantly replaced to avoid damage to the equipment.
The article is derived from six sulfur fluoride gas: www.feiliergas.com/