In practice, in the choice of dissipative appliances, the main considerations of its dissipative effect, the safety of field use and what is applicable to the electrified body, and pay attention to the economic benefits.

1, the effect of power dissipation

From the point of view of corona current, DC high-voltage power eliminator is the best effect of power elimination (power elimination, power elimination time), followed by high-frequency high-voltage power eliminator, slightly worse.

2. The safety of the eliminator includes two factors.

First, the safety of fire and explosion prevention. The second is whether there is safety damage to the surrounding equipment and operators.

3. The condition of the charged body is also a factor that should be considered when choosing the eliminator.

For plates, films, fabrics, paper and other surface charged objects, as long as the consumption capacity to meet the requirements, you can choose DC and industrial frequency consumer; for suspended or piled up charged objects, i.e., space or volume charged objects, you should choose the ionization fan or gas source ion rods and wind mouth consumer; when the charged polarity of a certain amount of charged or charged, charged with a large amount of moving speed, you should choose the DC high-voltage consumable; installation distance should not be too large, 5cm is appropriate. Too large, 5cm is appropriate. If allowed to residual part of the electrostatic charge, should choose the gas source AC ion bar or DC high voltage ion bar; for the choice of gas source AC ion bar or DC high voltage ion bar; electric body, such as the space location allows, can choose the ion fan or high-frequency AC power eliminator. If the residual part of the electrostatic charge is allowed to remain, the gas source AC ion bar or DC high-voltage ion bar should be selected; for the selection of gas source AC ion bar or DC high-voltage ion bar; electric body, such as spatial location permits, the choice of ion fan or high-frequency AC eliminator. Another special electrostatic eliminator is known as space electrostatic eliminator, its initial purpose is to eliminate excess electrostatic charge in the space, maintain space electrostatic balance, reduce the adhesion of particles in the space, reduce particle contamination, so that the particles are filtered by the air conditioning purification system. Its working mode is DC or pulsed DC.

Installation position of static electricity eliminator

It is very important to install the eliminator properly. Improper installation will not only reduce the effect of dissipation, but also exacerbate the charge, and even cause greater harm. Therefore, how to correctly set the position of the eliminator according to the site conditions and measurement analysis.

A, the location of static electricity source; B, the back of the object has a grounding body; C, adjacent to the grounding body; D, the location of other dissipators

Figure 3 Locations for setting up the deactivator

Generally speaking, the de-energizer should be installed at the highest potential of the charged body as far as possible. Figure 3 attached is an example of a location for setting up an electrical dissipator so that the electrical dissipation efficiency is highest (e.g. 90% or more) at the location where the electrical dissipator is installed. In principle, the following locations or sites should be avoided in the installation location and environment of the de-energizer:

The location of the static electricity source (as shown in Figure 3 A); the back of the object has a grounding body (as shown in Figure 3 B), or adjacent grounding (as shown in Figure 3) C), or other dissipative appliances (as shown in Figure 3) D) these locations; easy to contaminate the dissipative appliances or 50 degrees Celsius temperature ℃ relative humidity in the environment of more than 70%.

The mounting angle of the eliminator should be perpendicular to the surface of the energized body. In addition, the dissipator should be fixed on a firm support or fixed mechanical equipment, and require reliable grounding (such as the design of grounding components). In the actual process site or important equipment, electrostatic charged body varies greatly. According to the above principles, carrying static electricity detection table, combined with the actual situation on the site, to determine the optimal installation distance of the eliminator and the flow rate of the gas source, reasonable installation of the eliminator.

Static electricity eliminator installation requirements

1 、General Provisions

On-site power supply wiring should be correct, safe and reliable, electrical equipment grounding wire should be well grounded (public grounding resistance of less than 1 ohm). The compressed air circuit should be clean and dry without dust, oil and water.

2, mandatory provisions

Explosion-proof static eliminator has special safety conditions, in the construction, installation and use of the process should strictly comply with the product explosion-proof certificates, product specifications and relevant national standards for electrical equipment in explosive environments.

3、 Installation should follow the principle

Static eliminator should be installed in the area of anti-static requirements. Installation of static eliminator, should follow the technical requirements for the use of products, equipment, electrical grounding is good. According to the requirements of the product specification to ensure that the electrostatic eliminator discharge electrode and the surrounding metal parts to maintain a certain safety distance. The surface of the electrostatic eliminator shall not be covered. The installation interval of the static eliminator should be determined according to the setup requirements of the anti-static area on site and the recommendations in the product manual to determine the best installation interval or consult the product supplier. The air inlet of the ionized fan static eliminator should be kept at the necessary distance from the surrounding obstacles, please refer to the product manual or consult the product supplier. There should be no obstacles between the installation location of the Static Eliminator and the object to be de-energized.

4. After the installation of the static eliminator is completed, the static eliminator should be on standby or shut down, and start up after debugging, trial operation and official use.

Hefeng Machinery Group focuses on the development and application of surface treatment industry for more than 20 years, corona machine, corona treatment machine, plasma machine, static generator, static eliminator, dust removal machine, UV curing, UV power supply, electronic UV, UV light box, plasma treatment system, vacuum plasma, spark machine, plasma treatment, flame treatment machine, electronic spark machine, EDM impingement machine, surface treatment machine, polymer Surface Flowering Machine, UV lamp, UV transformer, and so on. It is a national high-tech enterprise integrating R&D, production and sales.

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