How electrostatic filters work

The electrostatic filter is generally composed of two stages. When the air passes through the filter section, the particles in the air are charged under the action of circulating ions between the main plate and the ground electrode; then there is the collection section, where the charged particles are collected in the filter section. Arrested.

When the gas containing dust particles passes through the high-voltage electric field formed between the cathode wire (also called corona electrode) connected to the high-voltage DC power supply and the grounded anode plate, corona discharge occurs at the cathode and the gas is ionized. At this time , the negatively charged gas ions move toward the sun plate under the action of the electric field force. When they collide with the dust particles during the movement, the dust particles are charged with a negative charge. The charged dust particles also move toward the sun plate under the action of the electric field force. The anode moves, and after reaching the anode, the electrons it carries are released, the dust particles are deposited on the anode plate, and the purified gas is discharged out of the dust filter.

Under the action of an external high voltage in the electric field, electrons are emitted from or near the surface of the metal wire of the negative electrode and move rapidly toward the positive electrode, colliding with gas molecules and ionizing them. When the oil fume exhaust gas passes through this high-voltage electric field, the oil fume particles are charged due to collision and captured gas ions in a very short time, and move towards the positive dust collecting plate due to the force of the electric field, thereby achieving the separation effect.


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