WESP (wet electrostatic precipitator)

A wet electrostatic precipitator is an efficient modular cleaner for fine particles and aerosols. Each module has a capacity of 1000 – 300,000 m3/h. In large units several modules are installed concurrently.

How WESP operates

Saturated dust-laden gases enter the casing at the bottom where the gases are uniformly distributed to the vertical tubes. The walls of the tubes are electrically grounded and form the collecting electrode surface. In the center of each tube is a discharge electrode, with high voltage of negative DC polarity applied to each. Corona discharge is formed at the sharp metal points of the electrodes, creating ions that attach to the dust particles. In this way the particles become negatively charged.

Charged particles are driven towards the collecting electrodes by the high voltage, where the dust and aerosols are deposited onto the tube internal surfaces. A condensed water film is formed on these surfaces. When this water drains to the bottom it carries collected dust and aerosols with it.