PRECIPITATORS - EGB

The EGB filter is a high performing dry electrostatic precipitator.

The EGB design is modular shaped. The nominal capacity of each module is between 10.000- 80.000 m3/h. At larger installations a number of modules are installed in parallel.

The well-designed and proven
design provides high operational reliability, long-term stable collection efficiency, low energy consumption and simple maintenance.

Highlights EGB Technology

• High Intensity Precharger
• Operates at increased specific power levels, resulting in increased particulate charge.
• Gravel is cleaned and handled with industry standard design vibratory feeders and bucket elevator, resulting in high reliability with minimal maintenance.
• Units can be designed for particulate emissions guarantee ranging from
  0.02 to 0.2 gm / kg of effluent gas.
• Cost can be dramatically reduced depending upon required performance
• Units can effectively operate as pre-filters for RTO’s and RCO’s.

Why select a EGB?

• Gravel bed is resistant to damage by fire.
• High collection efficiency of submicron particulate.
• Process is totally dry.
• Low Energy Consumption
• Up to 90.000 acfm per gravel filter module

The EGB-Filter is used to precipitate especially submicronic particulate, condensable
hydrocarbons and high resistivity dusts. Some of the advantages are;

Submicronic particulate
The electrostatic collecting surface is the surface of the gravel.
The enormous surface allows for a high efficiency of precipitation, especially
of the submicronic particulate.

Blue haze
The EGB filter allows the precipitation of submicronic hydrocarbon aerosol,
thus effectively eliminating opacity and blue haze.

Non flammability
The filtering medium consists of gravel, which makes the filter virtually non-flammable.

Totally dry
The dusty pollutants and particulate are captured in their original dry form:
There is no production of sludge or semi-liquid paste.
The filter body is normal not subject to corrosion.

Low energy consumption
The absorbed power for the precipitation is extremely low.

Sticky pollutants
The pollutants are separated from the gravel in systems external to the filter.
This allows to operate with sticky pollutants, usual condition for hydrocarbon gases.

Equipment reliability
The simpleness of the various components grants a long life. Furthermore,
by using gravel as a filtering medium, no problem arises, even at high temperature.

The Gravel Bed Precipitator (GBP) has been developed specifically
for application to OSB dryers. It provides highly efficient emissions
control for particulate by utilizing a two step electrostatic process:

Step 1 Particulate is electrostatically charged
The particulate in the gas is negatively charged in the ionizing section.
It normally runs at a 20-40 kV. The highly effective process electrically charges the
particulates to near saturation point. The polarity is negative.

Step 2 Charged particulate is electrostatically
deposited onto the surface of gravel.
The gas is forced through the gravel bed. In the gravelbed the gravel is charged by
means of the embedded electrode. It normally runs at 10-20 kV. The polarity is positive. The negatively charged dust adheres to the positively charged gravel.

The dustremoval.
The gravel moves slowly downwards. In the bottom the dirty gravel flows through
the manifold to a bucket elevator . The gravel flows through a wind-sieve before
the cleaned gravel is entering into the surge bin on top of the filter.