Abstract:

Measures to eliminate static electricity, either physical or chemical, can be classified into four groups in general: those involving grounding, installation of static electricity elimination devices, application of anti-static agents, and shielding.

An electrostatic eliminator (using the air ionization technology) is increasingly being used under critical situations to control or neutralize static charge. It uses the air ionization technology to allow for conduction though air, so as to eliminate static electricity in conductors of insulating and insulated bodies. Air ions in the air, molecules that gain or are deprived of electrons, are present in normal air but removed through filtration and air conditioning. And then, the ions apply high voltage on tipped objects and cause radiation, namely, corona discharge. All the air ionization systems work by spraying large amounts of positive or negative ions into the air. When the ionized air is in contact with charged objects, the surface will attract ions of opposite polarity and gather them on the surface of objects involving static electricity, thus neutralizing and eliminating it.

According to the working principle, static eliminators are categorized into inductive types, AC types, steady state DC types, pulse DC types, and isotope types.