The high-low temperature impact humidification test chamber controls the static electricity not only for safety, but also the purpose of improving the product quality. For example, in the grinding operation, the electrostatic charge can affect the finished product to achieve good quality, or in some textile mills, the electrostatic charge can cause The fibers are straight and not lying flat, resulting in a defective product. It is well known that transporting materials with chutes or pipes requires the accumulation of static charges, causing the material to adhere to the inner walls of the chute or pipe, which can cause blockages.
I. Minimum fire energy The fire or explosion hazard caused by static electricity discharge is the result of the discharge energy generated in the combustible mixture being converted into heat energy, causing the temperature of the combustible gas to rise and exceeding the ignition temperature. The minimum energy that raises the temperature to the ignition temperature is called the minimum ignition energy, and this value is used as a target value for the explosion and fire.
II. High-low temperature impact Damp heat test chamber Measures against static electricity disasters Electrostatic disasters occur due to the four conditions of charge generation, charge accumulation, discharge phenomenon, and flammable substances. Therefore, if one of these conditions is eliminated, the disaster can be prevented. It is important to accurately determine which of these four segments is to be stopped and take appropriate countermeasures. As a basic measure to prevent static disasters, it is proposed to introduce specific methods from the viewpoint of preventing and suppressing static electricity.
(1) Suppression of generation of static electricity: Since the source of static electricity is friction or separation between objects, it is necessary to suppress these effects as much as possible. For example, in liquid line transport, dust air transport, or plastic extrusion, the best method is to reduce the speed. In fact, this will affect the efficiency of the work. The safe flow rate of petroleum is below 1m/s. Static electricity is charged or polarized depending on the substance. Therefore, a feasible measure is to avoid the use of an easily charged insulator, and to use a material which is difficult to generate static electricity by combination.
(2) Promote the leakage of electric charge: In disaster countermeasures, the simplest method is to ground. The method is to cause the generated charge to quickly disappear into the earth through the metal conductor. However, with this method, if the electrified body is guided, it can be easily eliminated, and plastics such as plastics, chemical fibers, and petroleums have little effect because the charge of the charged portion is difficult to move. In addition, there is a method in which a conductive substance is added to an object to cause a charge to leak. This includes the addition of metal powder or carbon black to the tire or operator's boots and the floor material of the chemical plant, and the use of hydrophilic oils in chemical or plastics to prevent charging. If the relative humidity in the air is increased, a water absorbing layer is formed on the surface of the object to enhance conductivity, and it is hardly charged at a humidity of 80% or more. For this reason, in places where there is a possibility of charging, it is possible to increase the humidity by adjusting the humidity device or sprinkling water. The problem is that people may feel uncomfortable or have an adverse effect on equipment and products.
(3) Elimination of charged charges: In the case where static electricity is suppressed even if charge generation is suppressed and charge leakage is caused, the static electricity to be charged should be actively eliminated. A destaticizer can be used for this, and various destaticizers are currently being developed and sold. The static elimination device currently developed uses ion to remove electricity. According to the ion generation method, there are three types: self-discharge type discharger, voltage-added type discharger, and radioisotope type discharger.
Third, high and low temperature impact damp heat test chamber electrostatic protection grounding In the treatment of flux, powdery substances or other flammable products, there are often dangerous potentials, because static electricity accumulates on the equipment, processed materials, and even on the operator. Electrostatic charges are discharged to the ground or other equipment. When flammable or explosive substances are encountered, they will inevitably cause fires and explosions, causing many casualties and a large amount of property damage every year.
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