The EGB (Electrified Gravel Bed) filter is an electrostatic dry precipitator. The process of picking-up and precipitation of the particulate takes place in two phases, a first ionization step at very high voltage (up to 60 kV), and an abatement step at 10-20 kV.
The picking-up and then the abatement of particulate takes place inside a gravel bed, which is continuously cleaned and recirculated inside the machine.
This type of filter has been developed to precipitate especially sub-micronic particles, condensable hydrocarbons and
high resistivity dusts
Through the gravel bed also sticky pollutants can be separated.
Low installed power, no production of sludge or fluids to be processed.
EGB filters are totally modular and allow to set-up filtering plants for capacities ranging from 10,000 m3/h up to 500,000 m3/h.
Therefore they are suitable for plants that use wood, wastes, biomass boilers, and drying systems in different industrial sectors.
Advantages:
High precipitation efficiency, especially of sub-micronic particles, abatement of hydrocarbons aerosol (blue haze), virtually non-flammable.
Limited maintenance compared to other filtering systems, no special wastes to be
treated and dumped.
Reduced energy consumption compared to filters using water technology (WESP)
