Static eliminator selection
In practical work, when selecting a consumer, it mainly considers its power-dissipation effect and safety issues in the field, and what kind of charged body is suitable for it, but also pay attention to economic benefits.
1, power consumption effect
From the perspective of corona current, the best effect of eliminating electricity (discharging power, power-off time) is DC high-voltage consumer, followed by power frequency high-voltage consumer, high-frequency high-voltage consumer is slightly worse.
2. The safety of the consumer includes two factors:
1) It is the safety of fire and explosion protection.
2) Is there any safety damage to the surrounding equipment and operators.
3. The condition of the charged body is also a factor that should be considered when selecting the consumer:
1) For surface-charged objects such as plates, films, fabrics and papers, DC and power frequency consumers can be used as long as the power-removing capacity meets the requirements;
2) For charged objects that are suspended or accumulated, that is, objects that are space or volume charged, ion fans or gas source type ion bars and air nozzles should be used;
3) When the charge polarity of the charged body is constant or the charge is large and the moving speed of the charged body is large, the DC high voltage consumer should be selected; the installation distance should not be too large, 5cm is suitable.
4) moving the charged body in the papermaking, sheet coiling and rubber mixing process, if the residual part of the static charge is allowed, the gas source type alternating ion bar or the direct current high pressure ion bar should be selected;
5) For charged bodies with strict requirements on residual voltage and low power consumption, such as space position, optional ion fan can be used, and high-frequency AC consumer can also be used.
6) moving the charged body in the papermaking, sheet coiling and rubber mixing process, if the residual part of the static charge is allowed, the gas source type alternating ion bar or the direct current high pressure ion bar should be selected;
7) For charged bodies with strict requirements on residual voltage and low power consumption, such as space position, optional ion fan can be used, and high-frequency AC consumer can also be used.
8) Another special static eliminator is called a space static eliminator. It was originally developed to eliminate excess static charge in space, maintain space electrostatic balance, reduce particle adhesion in space, and reduce particulate pollution. So that the particles are filtered out by the air conditioning purification system. It works in DC or pulsed DC.