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Regenerating Activated Carbon Filtration

Regenerating Activated Carbon Filtration

Automatic regenerating filters are used especially for concentrations of 0,5 - 20 g/Nm³ with highly chlorinated hydrocarbons such as perchlorethene.

Steam regenerating filter units consist of fully automatic 2 or 3 bed activated carbon filters with an integrated control system. The filters are made from stainless steels or special materials such as PVDF or certain types of glass. Other components include the air blower, a heat exchanger and phase separator.

The contaminated air is initially fed into the first bed. The carbon adsorbs the pollutants from the process air. After the bed is saturated, the process air feed is switched to the second bed.
The first bed then goes through the desorption phase. Steam is blown into the bed, which desorbs the pollutants from the carbon. This steam-pollutant mixture is then fed into a condenser and from there into a separator. In the separator, the flow is then separated into solvent and contact-water.

The solvent flows into a tank, and can then be disposed of.

The contact water is then treated. Prantner boundary layer evaporators (GVD) and strip units are primarily used. The pollutant is stripped out of the water and returned to the inlet of the unit where it is once again picked up by the activated carbon.

As the carbon in the bed is now wet from the steam it is next dried in preparation for operation.

Adsorption, desorption and drying times are programmable via PLC.

We are looking forward to give you advise on the application possiblities for your project.