Wet, tar and oil electrostatic filters

R&R-BETH® wet, tar and oil mist electrostatic precipitators are used to clean exhaust air processes containing aerosols where the use of a dry separation process is not possible due to the dust and gas characteristics.

For decades, this technology has been used and optimized by R&R-BETH® to reliably filter aerosols with the finest dust particles, as well as water-saturated process gases containing tar and oil.

Another positive effect is the additional separation of pollutant components such as HCl, SO₂, NaCl and HF.

R&R-BETH® wet electrostatic precipitators are mostly used to clean process gas streams downstream of dryers, scrubbers or quenchers.

R&R-BETH® tar electrostatic precipitators are mainly used in the process cleaning of charcoal works.

R&R-BETH® oil mist electrostatic precipitators are used in the cleaning of oil-containing aerosols (e.g. oil mist and oil vapors)

FUNCTIONAL PRINCIPLE

The process gas enters the electrostatic precipitator vertically from below and is brought to a uniform flow profile across the entire filter cross-section by means of gas distribution.

The high voltage (78–135 kV) applied between the spray electrodes and the collecting honeycomb elements electrically charges the particles, i.e. aerosols / water droplets.

On their way through the electric field, the charged particles are transported by electrostatic forces to the collecting electrodes, where they agglomerate with the particles already deposited and are removed by periodic rinsing with water.

The dust/water mixture flows by gravity into the filter trough arranged below the gas inlet. The cleaned gas leaves the filter through the gas outlet hood mounted on the filter head.