There are two ways to reduce static electricity: one is to play a role in accelerating the leakage or neutralization of static electricity, and the other is to control the whole process of the processing technology to limit the cause of static electricity. There are two ways of the former, leakage method and neutralization method. Grounding devices, humidification, adding antistatic agents, etc. belong to the leakage method, and the application of magnetic induction electrostatic scavengers, high-voltage electrostatic scavengers, ray electrostatic scavengers and ion current electrostatic scavengers all belong to the neutralization method. The latter is the process control method, which includes the countermeasures adopted at the level of raw material selection, process technology, machine equipment structure, and actual operation management methods. Characteristics of storage tank farms.
The prevention of static electricity mainly includes the following many levels, and there are the following six methods:
1. Electrostatic grounding device
Grounding devices are a simple, common way to reduce static electricity problems, and the key is to reduce static electricity on electrical conductors. In order to avoid safety accidents caused by static flames, appropriate grounding methods should be adopted according to industry standards and industry norms.
Second, the surrounding humidification
Increasing the air humidity in the air is beneficial to reduce static electricity on the spot. Increasing the air humidity in the air is to increase the saturation level of water vapor in the air, which will digest and absorb or absorb moisture on the surface of the block, thereby reducing the resistor index on the surface of the block, facilitating the introduction of electrostatic positive charges into the ground. Reducing static electricity by increasing the relative humidity of the air also has its limitations. It should be based on the quality of not endangering the physical and mental health of workers, and not destroying machinery and equipment and dangerous chemicals. When performing humidification to reduce static electricity, the general air humidity is around 70%, and the accumulation of static electricity will decrease.
3. Add antistatic agent
Antistatic agents have good electrical conductivity or strong water absorption. Therefore, in the high insulating layer material that is easy to cause static electricity, after adding the antistatic agent, it can reduce the volume resistor or surface resistivity of the raw material, accelerate the leakage of static electricity, and reduce the risk of static electricity.
Fourth, the processing technology control method
The amount of static electricity caused by the fluidity of hazardous chemicals in the pipeline is proportional to the square of the water flow rate of hazardous chemicals. Reducing the water flow reduces friction levels, which can reduce the generation of static electricity. Therefore, manipulating the flow of hazardous chemicals transport water is a reasonable way to reduce the static positive charge in the case of the storage tank entering and exporting hazardous chemicals.
5. Reduce the additional source caused by static electricity
When the water content of hazardous chemicals or different hazardous chemicals are mixed and compressed according to the air, the amount of static electricity will expand. A 5% water content in hazardous chemicals will increase the power efficiency by 10 to 50 times. Hazardous chemical ventilation blends are also risky. Therefore, the canning and exporting of hazardous chemicals should prevent the mixing of hazardous chemicals with water, gas and other hazardous chemicals.
6. Solve body static electricity
The solution of body static electricity can use specific measures such as grounding devices, wearing anti-static shoes, and anti-static clothing to reduce the accumulation of static electricity on the body. Soil, gravel, concrete and other pavements, the resistor is not easy to be larger than 106Ω, all are electrostatic conductors. In the storage tank area, anti-static shoes are required. In addition, you should wear anti-static work clothes, gloves and sun hats. When wearing anti-static shoes, considering the conductivity of the socks you wear, you need to wear conductive anti-static socks, so that the static energy of the body can be guided into the ground according to the anti-static shoes. The soles of the shoes are pasted with insulating film.
