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Gas scrubber:
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The Application
Villiger gas scrubbers are used for absorbtion of various inorganic pollutants in air streams as well as wet dust suppression.
Villiger gas scrubbers are used in the following applications:
- Removal of HCl vapours from the exhaust of catalytic oxidation units after treatment of chlorinated hydrocarbons
- Acid scrubber with sulphuric acid of gases containing ammoniac
- Wet dust suppression / removal
- Absorption of damaging gases in the chemical industry
- Dust removal from conveyer belt units in civil engineering / excavation
- Treatment of off-gases from smokeries
- further applications from other areas of industry
Process Principle / Design  Flow sheet
Villiger gas scrubbers are generally designed as counter-current flow packed columns manufactured from a plastic (e.g. PP, PE, PVDF) or stainless steel (e.g. 1.4571, 1.4541). The scrubbers can be produced as single or multi-stage as required.
The scrubbers consist of a column lower piece (very often with an expanded water sump) and a cylindrical upper piece (to container the packing and spray nozzles etc.). The scrubbers are also equipped with a circulation pump, a neutralisation unit as well as drainage/pump-off equipment for continuous or discontinuous emptying of the spent scrub medium. Consistent air feed is guaranteed through the proven Villiger system.
For monitoring and control, mostly sensors for level, conductivity, pH, density, pressure and temperature are used.
Process control is completely automatic and is run on a PLC system with, if required, an integrated process visualisation. |
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