The harm of static electricity and the importance of prevention and control in the chemical industry
The hazards caused by static electricity have received considerable attention in the production departments of the chemical industry, but the research on the hazards and prevention of static electricity in the warehousing departments of these industries is still— a weak link. With the continuous expansion of the functions and scale of warehousing, how to control and prevent the harm caused by static electricity has gradually attracted people’s attention.
1. Static electricity generation in the warehousing process
The generation of static electricity has its internal and external causes. The internal cause depends on the conductive properties of the material, and the external cause is the common friction between materials that causes electrification. Such as friction, rolling, impact, etc. between materials during storage and transportation. Followed by attached charging, induction charging, etc. As far as the warehousing department is concerned, many commodities and packaging materials have internal conditions for the generation of static electricity. At the same time, warehousing operations are inseparable from operations such as handling, stacking, tarpaulin, and covering. Therefore, it is inevitable that products will generate static electricity. Friction, rolling, impact, etc. For example, when petroleum or organic solvents are transported in warehouses and discharged into tanks, friction will occur between these materials and pipeline walls and equipment, which will produce high static electricity accumulation. Plastic packaging of general commodities will also generate static electricity due to mutual friction during the stacking process.
2. Hazards of static electricity in warehousing The harm caused by static electricity in warehousing activities is mainly because it can accumulate on the surface of objects to form a high static potential and easily cause electrostatic discharge sparks. Its harm is mainly in Two aspects:
1. It is easy to cause explosion accidents. For example, flammable liquids (such as gasoline, kerosene, diesel) and organic solvents (benzenes, ethers, ketones) stored in warehouses will explode if the vapor they volatilize mixes with air in a certain proportion, or the solid dust reaches a certain concentration. At the limit, once it encounters an electrostatic discharge spark, it will become an ignition source and cause explosion.
2. It is easy to produce electric shock. For example, high-potential electrostatic discharges during transportation may cause discomfort to operators, which often occurs among workers who carry plastic packaging items in warehouses. High-potential electrostatic discharges may occur due to strong friction during transportation and stacking. , there have even been cases where operators were knocked down by electrostatic discharge.
3. Prevention and Control of Static Electricity Hazards in Warehouses
The following steps are generally taken to prevent and control the hazards caused by static electricity in warehousing.
1. The amount of materials should be controlled so as not to generate static electricity. For example, for flammable liquids, limit their flow rate in pipelines, control their loading and unloading methods, prevent mixing of different oils and solvents, and prevent liquids from mixing. Water and air are trapped.
2. Take measures to completely dissipate the generated static electricity to avoid accumulation. For example, installing good grounding devices on equipment, increasing the relative humidity of the workplace, laying conductive floors on the ground, and spraying conductive paint on certain tools are all conducive to the discharge of static electricity.
3. Add a certain amount of countercharge to the charged body to neutralize the charge on the charged body to avoid an increase in static voltage. Such as the use of induction static neutralizer belongs to this type of method.
4. In some cases, the accumulation of static electricity is unavoidable. The static voltage rises rapidly and even generates electrostatic discharge sparks. Measures must be taken to prevent fire and explosion accidents despite the discharge. For example, the space of the flammable liquid storage tank is filled with inert gas such as nitrogen, an operating alarm device is installed, and a high-efficiency exhaust device is used to prevent the flammable gas or dust in the air from reaching the explosion limit.
5. In places with fire and explosion hazards, such as hazardous chemical storage places, staff should wear conductive shoes and conductive work clothes to eliminate static electricity in the human body in a timely manner, which is also a way to prevent static electricity hazards. One of the effective measures -.
AAASDFWFWFWE
Disclaimer:
Disclaimer: Some of the texts, pictures, audios, and videos of some articles published on this site are from the Internet and do not represent the views of this site. The copyrights belong to the original authors. If you find that the information reproduced on this website infringes upon your rights, please contact us and we will change or delete it as soon as possible.
AA
