An explosion occurred in a pearl cotton factory in Wuji County, Hebei Province. What do you think is the cause of the explosion?

An explosion occurred in a pearl cotton factory in Wuji County, Hebei Province. The explosion may be caused by the explosion of cotton dust on Mars.

I. Explosion accident of a pearl cotton factory in Wuji County, Hebei Province It is reported that an explosion accident occurred in Tianzexin Pearl Cotton Factory in Wuji County around 10/2, and the search and rescue work at the scene of the explosion accident in Tianzexin Pearl Cotton Factory in Wuji County ended on June 5438+0 13. Tianzexin Pearl Cotton Factory is located in a wheat field about 200 meters south of Shizhuang Village, Beisu Town, Wuji County. Several workshop-style factories are connected together, covering an area of dozens of acres. After the explosion, several factories were damaged to varying degrees, and fragments of colored steel tiles were found in the wheat fields about 100 meters south. Both ends of the road where the explosion factory is located are guarded by police to restrict the passage of vehicles. The responsible person has been controlled by the public security organ, and the cause of the accident is under investigation.

The cause of the explosion in the pearl cotton factory is still under investigation. It may be that the explosion of pearl powder in case of fire is in the dry season, which is prone to fire accidents. The explosive power of cotton in case of fire is two to three times that of black powder, and the explosive power should not be underestimated. Cotton is flammable, and the small particles of cotton are more likely to react with oxygen because of its large surface area, which in turn leads to explosion, which is also commonly known as dust explosion.

The process of dust explosion is extremely complicated. First, after dust particles gain energy from ignition sources, such as heat conduction and heat radiation surface heating, dust particles are heated successively to produce melting and gasification, and tiny proton particles or sparks that generate heat are generated, thus forming the ignition source of dust. Dust has a large surface area and can fully contact with air. In addition, the surface temperature of dust particles rises sharply because of the existence of dust layer, and these temperatures are covered by dust layer and cannot be released. When the dust concentration is mixed with air to reach the lower explosion limit, it can burn when it meets the ignition source. Because dust is fully mixed with air, dust can explode and release energy in the form of pressure waves. In the process of impact, the dust in the mechanical device is often blown out, blowing up the dust layer on the ground and forming a flying dust cloud. These dust clouds will be instantly rekindled by the thermal residue of the first explosion, and then a second explosion will occur.

Enterprises must pay attention to fire safety, and it is most important for flammable and explosive materials to nip in the bud. At ordinary times, they should do a good job of inspection, use good dust removal equipment to control the dust in the factory building, prevent dust accumulation, and strictly control the ignition source.