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 charged 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 the plate, film, fabric, paper and other surface charged objects, as long as the consumption capacity to meet the requirements, you can choose DC and industrial frequency consumables; for suspended or stacked charged objects, that is, space or volume charged objects, should choose the ionization fan or gas source ion rods and wind mouth consumables; when the polarity of the charged or charged, or charged with a large amount of large, charged with a large speed of movement, you should choose the DC high-voltage consumable; installation distance should not be too large, 5cm which is appropriate. Too large, 5cm is appropriate. In papermaking, sheet rolling and rubber mixing process, 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 residual pressure requirements of strict, small amount of charged charged body, such as the space location allows, you can choose the ion fan or high-frequency AC power eliminator. In the papermaking, sheet rolling and rubber mixing process, 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 strict requirements of residual pressure, charged with a small amount of charged body, such as the space location allows, you can choose the ion fan or high-frequency AC power eliminator. Another more special electrostatic eliminator is known as space electrostatic eliminator, its initial purpose is to eliminate excess electrostatic charge in space, to maintain the space electrostatic balance, to reduce the adhesion of particles in the space, to reduce particle pollution, so that particles are filtered by the air conditioning purification system. Its working mode is DC or pulsed DC.

Installation position of electrostatic eliminator

It is very important to install the eliminator properly. Improper installation will not only reduce the effect of the eliminator, 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 generation source; B, the back of the object has a grounding body; C, the grounding body adjacent to; D, the location of other electrical dissipators

Locations for setting electrical dissipators

Generally speaking, an electrical dissipator should be installed at the highest potential of a charged body as far as possible. Make the installation position of the dissipator have the highest dissipation efficiency (e.g. 90% or more). In principle, the installation location and environment of the de-energizer should avoid the following positions or locations:

Position with static electricity source; back of the object with grounding body, neighboring grounding body or other dissipative apparatus; easy to contaminate the dissipative apparatus or 50 temperature ℃ relative humidity of 70% or more of the environment.

The mounting angle of the device should be perpendicular to the surface of the electrically charged body. In addition, the dissipator should be fixed on a solid 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 and air source flow of the dissipator, reasonable installation of the dissipator.

Static electricity eliminator installation requirements

General Provisions General Provisions

On-site power supply wiring should be correct, safe and reliable, and the grounding wire of electrical equipment should be well grounded (public grounding resistance less than 1 ohm). On-site compressed air circuit should be clean, dry, no dust, oil, water.

2 Mandatory provisions

Explosion-proof static eliminator has special conditions for safe use, in the construction, installation and use of the process should strictly comply with the product explosion-proof certificate, 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 with anti-static requirements. When installing the static eliminator, follow the technical requirements for the use of the product, and the equipment is well electrically grounded. Ensure that the discharge electrode of the static eliminator and the surrounding metal parts to maintain a certain safety distance, and follow the requirements of the product manual. The surface of the static eliminator should not be covered. The installation interval of the static eliminator should be based on the setup requirements of the antistatic area on site and the recommendations in the product manual to determine the optimal 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. For details, 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 removed.

4. After the installation of the static eliminator is completed, the static eliminator should be standby or shut down, debugging, test run and start after formal use.

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