Safety | Static electricity is not far from you, don't know the cause!
In recent years, electrostatic accidents in the chemical industry have occurred frequently, causing widespread concern in the industry. Static electricity is hidden in all aspects of chemical production, transportation, storage and transportation. Especially in the petrochemical industry, about 80% to 90% of the materials have the risk of fire and explosion. Two factors have caused the chemical industry to become a high-incidence industry for electrostatic accidents. Some chemical companies have insufficient understanding of the seriousness of electrostatic hazards. Every company has safety regulations, but most of them lack targeted anti-static safety measures, and also make static electricity "available."
Static electricity is not far from you
In terms of process classification, the solid material has a large area of friction, and the solid materials are in contact with each other under pressure and then separated, and the solid material is extruded, and the friction occurs between the pipe wall and the filter wall, and the solid material. The process of crushing, grinding, stirring, etc. can cause dangerous static buildup.
Processes such as filtration, sieving, pneumatic conveying, agitation, spraying, and transport of powder materials may also cause dangerous static buildup. Liquid materials can generate dangerous static buildup during high-speed flow, filtration, agitation, spraying, spraying, scouring, splashing, pouring, and even precipitation. Flammable liquid vapors and flammable gases can also create dangerous static buildup when they are entrained in solids or liquids, when they are ejected at high speeds from slits or valves or at high speeds in the pipe.
In addition, people wearing synthetic chemical fiber garments may have dangerous static buildup during flight. Therefore, many fires and explosions are caused by static electricity accumulation.
Harm can not be ignored
1. Static electricity causes fire or explosion accident
Most of the chemicals contained in petrochemical production facilities are characterized by flammability and explosiveness. According to the data, about 80% to 90% of the petrochemical plants are in danger of fire and explosion.
It has been found through experiments that substances with a resistivity of 10 m can generate static electricity. Petrochemical gases such as gasoline, benzene and ether have a resistivity between 1010 m and 1012 m, which can generate and store static electricity. In material spills, friction stir, gas-liquid flow, rubber coating operations in chemical and rubber products, injection molding operations and transportation, many static charges can occur, and the voltage can reach tens of thousands of volts. Discharges in the place of static fire or explosion, can ignite combustible benzene, hydrogen, liquid vapor, explosive mixture of combustible particles and air, and chemical flammable products, resulting in fire or explosion.
If the static sparks accompany the human body and harm the production area, it will become a dangerous ignition source with great mobility, strong hiding and difficult to grasp. The human body's electrostatic discharge energy can reach tens of millijoules, which is easy to ignite flammable benzene, hydrogen and combustible particles to cause fire and explosion accidents.
2, affecting normal production
Static electricity can cause great harm to safe operations, the number and quality of products, equipment and damage to the production environment. Static electricity can continuously reduce the powder in the production, hinder the passage of the pipe and the mesh hole, and cause the system to be pressed due to poor transportation. The overpressure can damage the equipment.
During storage and transportation of plastics and other products, electrostatic discharge will cause the product to melt, bond, discolor, and even decompose and damage, and scrap. The electrostatic discharge energy has a chance to cause the silicon components in the computer, the production regulating instrument, and the safety regulating system to be scrapped, resulting in an accident and causing an accident.
3, give people an electric shock
Electric shock is the damage that current causes to the central nervous system, nerves, etc. through the inside of the human body. Electrostatic shock is not an electric shock that continuously passes through the human body, and refers to the instantaneous impact damage caused by electrostatic discharge.