Liming sulfur hexafluoride is a colorless, tasteless, odorless, non-toxic inert gas with density heavier than air, and is also one of the six greenhouse gases found at present. The gas is widely used in the high-voltage electrical appliance manufacturing industry. The pure sulfur hexafluoride gas is a non-toxic and harmless asphyxiant gas. There is no such thing as sulfur hexafluoride is toxic.

However, the impure sulfur hexafluoride in Dawn is very harmful to the environment, human body and equipment. Especially when sulfur hexafluoride gas contains excessive water, it may be decomposed into HF, SO2, SOF2 and other toxic gases under the action of high-voltage arc, which has a great impact on people and things around. So, how serious is the harm of sulfur hexafluoride gas moisture? Where does the harm of sulfur hexafluoride gas and water come from?

Why do we value the harm of sulfur hexafluoride water at dawn so much? First of all, we must understand that the chemical property of sulfur hexafluoride (SF6) gas is very stable. It does not burn in the air, does not support combustion, and does not react with water, strong alkali, ammonia, hydrochloric acid, sulfuric acid, etc. The pure high-purity sulfur hexafluoride gas is very safe and harmless when there is no asphyxiation condition. However, because the gas extraction technology is not up to standard or the steel cylinder is not properly treated and stored, Or the SF6 gas that has been recycled for a long time will inevitably contain a certain amount of water. The extremely small amount of water will not pose a threat, but when the water content exceeds the standard, the harm of sulfur hexafluoride gas water is very great!

The water content of sulfur hexafluoride in Liming seriously exceeds the standard, which will endanger insulation, affect arc extinguishing and produce toxic substances. When the water content of the circuit breaker is high, it is easy to condense on the surface of the insulating material, causing the insulation to drop, and flashover breakdown occurs in serious cases. The gas with high water content is decomposed under the action of electric arc, and sulfur hexafluoride gas and water generate multiple hydrolytic reactions, producing tungsten trioxide, copper fluoride and other powder insulators. Copper fluoride has strong moisture absorption, attached to the insulation surface, reducing the flashover voltage along the surface. Hydrofluoric acid, sulfurous acid, etc. have strong corrosivity, corroding solid organic materials and metals, and shortening the service life of equipment.

In addition, the harm of sulfur hexafluoride gas moisture is not only for equipment, but also for SF6 gas and toxic decomposition products generated under the action of high temperature arc, which are harmful to health and environment.

The content of the article comes from sulfur hexafluoride gas: http://www.feiliergas.com