WESP

Technical Definition

WESP (Wet Electrostatic Precipitator) is an exhaust gas treatment device that combines electrostatic precipitation with liquid scrubbing technology. It is mainly used to remove particulate matter (PM), aerosols, acid mist, and heavy metals from industrial exhaust gases, especially suitable for high humidity and highly corrosive gas environments.

Core Working Principle

WESP achieves efficient purification through the following steps:

l Ionization Stage: High-voltage DC (usually 30-100kV) is applied between the discharge electrode (cathode) and the collection electrode (anode), forming a strong electric field that ionizes gas molecules, generating a large number of free electrons and ions.

l Particle Charging: Particles and droplets in the exhaust gas collide with free electrons/ions and acquire negative charges.

l Directional Migration: Charged particles move directionally toward the collection electrode (anode plate or tube) under the electric field force.

l Adsorption and Removal: After reaching the collection electrode, particles release their charge and are adsorbed by the continuous water film on the electrode surface, then washed away by the water flow, avoiding secondary dust emission problems common in dry electrostatic precipitators.

 Key Components

l High-voltage power supply: Provides stable DC high voltage, adapting to operating condition fluctuations.

l Electrode system: Cathode wires (discharge electrodes) mostly use corrosion-resistant materials (such as titanium alloy), anodes are mostly honeycomb or tubular structures.

l Water circulation system: Includes spray devices, water film formation devices, and wastewater treatment units.