Adsorption filter with high air permeability
OwnerHasso Von Blucher, Ernest de Ruiterinventors
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Abstract
The adsorption filter has a highly air-permeable, three-dimensional carrier framework essentially stable in shape, to which a layer of granular adsorber particles with a diameter of 0.1 to 1 mm is affixed. The carrier framework can be composed of wires, monofilaments or stays, the distance between them being at least twice as great as the diameter of the adsorber particles. The carrier framework can also be a large-pore reticulated polyurethane foam which has a weight of 20 to 60 g/l and pores with a diameter of 1.5 to 3 mm. In spite of a very slight pressure drop, the filter performance is excellent.
Claims27
An adsorption filter with high air permeability, comprising a highly air-permeable, three-dimensional carrier framework essentially stable in shape, formed of wires, monofilaments or stays, to which there is affixed a principal filtration stage and a preliminary filtration stage, the principal stage comprising a layer of granular, moisture insensitive adsorber particles with a diameter of about 0.1 to 1 mm, the preliminary filtration stage comprising a large pored adsorbent upstream of the granular adsorber particles, the gases to be filtered first encountering the large pored adsorbent to remove the large molecules of the material to be filtered and then encountering the downstream smaller pored adsorber particles, the distance between the wires, monofilaments or stays being at least twice as great as the diameter of the adsorber particles.
Dependencies are inferred from the claim text.