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Division 1.10.7 Combined emissions (solid + gaseous)

United Kingdom

Original text. Later amendments are not shown.

TechniqueDescription
Wet scrubbing

In a wet scrubbing process (by a suitable liquid: water or alkaline solution), the simultaneous removal of solid and gaseous compounds may be achieved. The design criteria for particulate or gas removal are different; therefore, the design is often a compromise between the two options.

The resulting liquid has to be treated by a waste water process and the insoluble matter (solid emissions and products from chemical reactions) is collected by sedimentation or filtration.

In the mineral wool and continuous filament glass fibre sector, the most common systems applied are:

  • packed bed scrubbers with impact jets upstream

  • venturi scrubbers

Wet electrostatic precipitatorThe technique consists of an electrostatic precipitator in which the collected material is removed from the plates of the collectors by flushing with a suitable liquid, usually water. Some mechanism is usually installed to remove water droplets before discharge of the waste gas (demister or a last dry field)