Process and apparatus for cleaning styrene-polluted spent air
OwnerRainer Hoffmann, Gunter Hanischinventors
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Abstract
A process for cleaning in particular styrene-polluted spent air by filtering out styrene and an apparatus for performing this process are described. The filter used is a biofilter of tree bark, particularly spruce bark. The filter is in the form of a bed of particles with a particle diameter of 0.5 to 3 cm. The process is particularly inexpensive compared with the relevant prior art cleaning process working with the physical absorption of the styrene on active carbon filters.
Claims18
Process for the cleaning of spent air, which has been polluted by solvent vapours occurring during plastic processing, comprising removing the spent air by suction and humidifying the spent air and then passing the spent air through a filter of bark having microorganisms, the filter being temperature controlled to a temperature above room temperature.
Apparatus for cleaning spent air polluted with solvent vapours occurring during plastic processing, comprising a flow-through container with an inlet and an outlet for the spent air, a filter between the inlet and the outlet for filtering the spent air, a fan located upstream of the filter for the forced delivery of the spent air, a spraying means positioned between the fan and the filter for humidifying the spent air, and wherein the filter includes bark provided with microorganisms and a heater for the temperature control of the filter.
Dependencies are inferred from the claim text.