Damage and Prevention of Static Electricity in Packaging Goods Storage
The harm caused by static electricity has received considerable attention in the production of packaging industry. However, the harm and prevention of static electricity in the storage of packaged goods is still a weak link. With the continuous expansion of the function and scale of storage, how to control and prevent the harm caused by static electricity has gradually attracted people's attention.
First, the static electricity generated in the packaging of goods storage
The generation of static electricity has its internal and external causes. Internal factors depend on the conductive properties of the material. The most common external causes are friction, rolling, impact, etc. Followed by the attachment of electrification. Many of the packaging of goods are equipped with internal conditions generated by static electricity. At the same time, storage, stacking, matting, and covering operations are all indispensable in storage. Therefore, friction, rolling, and impact will inevitably occur between packages. Wait. For example, when the oil is transported in the oil storage and filled into the oil drum, friction will occur between the oil and the pipe wall and the equipment. All these will cause high static electricity accumulation. Plastic packaging for general merchandise also generates static electricity due to mutual friction during stacking.
Second, the harm of static electricity in the packaging of goods storage
The harm caused by static electricity in the storage of packaged goods is mainly due to the fact that it can accumulate on the surface of the package to form a high static electricity potential and is prone to static sparks. The hazards are mainly in two aspects:
The first is the initiation of a flaring accident. For example, flammable liquids (such as gasoline, kerosene, and diesel oil) stored in warehouses (benzene, ether, ketones, etc.), which volatilize steam and air to a certain proportion, or the solid dust reaches a certain concentration, ie explosion limit, once In the event of static discharge, the flame will become an ignition source and cause an explosion.
The second is the phenomenon of electric shock. For example, the discharge of static electricity at a high potential during the handling process brings a sense of discomfort to the operator. This happens frequently when the plastic packaged goods are moved in the warehouse, and static electricity is generated during transportation and stacking due to strong friction. High-potential discharges have even occurred when workers are knocked down by electrostatic discharge.
Third, the prevention of electrostatic hazards in the warehouse
The following steps are generally used to prevent and control the hazards of static electricity in the packaging of goods storage.
1, should control the packaging as much as possible to generate static electricity, such as for flammable liquids, it is necessary to limit its violent shaking in the drum, control its handling methods, to prevent the leakage of different oil mix and prevent the water inlet in the drum .
2. Take measures to dissipate the generated static electricity as soon as possible to avoid accumulation. For example, installing a good grounding device on tools such as transportation, increasing the relative humidity in the workplace, laying a conductive floor on the ground, spraying conductive paint on certain tools, etc. are conducive to discharge of static electricity.
3. Add a certain amount of anti-charge to the charged body to make the charge on the charged body neutralize and avoid the rise of static voltage. The use of inductive electrostatic neutralizers falls into this category.
4. In some cases, the accumulation of static electricity is unavoidable, static voltage rises rapidly, and even electrostatic discharge sparks are generated. Therefore, measures must be taken to ensure that discharge does not result in fire and explosion accidents. For example, in the space where flammable liquids are stored, inert gas is filled, control alarms are installed, and high-efficiency exhausting devices are used to make the flammable gas or dust in the air less than the explosion limit.
5. In locations where fire and explosion hazards exist, such as chemical dangerous goods storage places, workers wear conductive shoes and static overalls, etc. to eliminate static electricity from the human body in time, which is also one of the effective measures to prevent static electricity hazards.