What is the main reason for the flash explosion of a chemical plant in Lanzhou?

Flash explosion refers to the accumulation of flammable and explosive gases in a space with no air circulation. When it reaches a certain concentration, once it meets an open flame, the wire will burn immediately and explode when it ages. Generally speaking, it is a one-time explosion, usually without obvious signs before the incident, which is extremely explosive and harmful. Usually, the whole process from the accident to the end is within a few seconds.

165438+1On October 3, a fire broke out in a chemical plant in Xigu District, Lanzhou. At present, the fire has been extinguished by firefighters, causing no casualties. Relevant personnel are actively investigating the cause of the fire.

In my opinion, there may be two reasons for the fire. On the one hand, chemical substances usually produced by chemical plants mainly include butanone oxime and organosilane. The generation of such substances shows that some volatile organic compounds will be produced, which will gather in a closed space and reach a certain concentration, and will burn and explode when exposed to open fire. On the other hand, the dry weather in autumn and winter is prone to fire, coupled with the regular inspection of chemical plants and the inadequate publicity of workers, which will lead to fire. For example: the line is aging, but the repairman does not repair it in time, and sparks will occur over time; Workers who operate the machine illegally, bring inflammable and explosive articles into the factory privately, and smoke in the non-smoking and fire-proof area of the factory are all likely to cause fires.

They all say that fire and water are ruthless. When there is a fire in the chemical plant, keep calm, call the fire department and evacuate quickly. During evacuation, cover your nose and mouth with wet towels and masks to prevent inhalation of toxic gases and protect the respiratory tract. People who can't evacuate should stand in some obvious places as far as possible so that rescuers can find them quickly. The relevant person in charge of the factory should hold more escape drills at ordinary times, teach employees how to use fire extinguishers, do all-round education, standardize the work of employees, and check and maintain them regularly. Only in this way can fires be avoided and nip in the bud.