The BETH dry electrostatic precipitator can be used to extract ultra- fine dust particles from process gases up to a temperature of 420 °C (788 °F) by means of an artificial electrostatic charge.
For this reason, the unit is used in particular for extracting dust from hot gases in combustion plants and in metal processing.
The electrostatic precipitator can operate either with or without an upstream cyclone (centrifugal) separator. It can reduce raw dust contents of up to 50 g/m³ to clean gas contents of 20 mg/m³ in standard conditions.
This corresponds to a separation rate of more than 99%.
The dust-laden process gas enters the electrostatic precipitator horizontally and is spread across the entire filter cross-section in a uniform flow profile by a gas distributor.
By applying high voltage to the spray electrodes located between the collection plates, an electric field is created that charges the dust particles.
Passing through the electric field, the charged particles are transported by electric field strength to the collecting electrodes, where they agglomerate with previously separated dust particles and finally are rapped off by the mechanical rapping system.
The rapped off dust particles drop into the filter hopper and are removed via the dust outlet. The purified gas leaves the filter through the gas outlet hood.