| 摘要 |
Filter for treating gaseous effluents to suppress odours, with a cyclonic exchange filter, at least one active carbon filter and at least one filter made of active carbon fibres. Filter cassette made of a sealed envelope with an inlet and outlet at opposite ends, containing a cylindrical filter element of the same length sealed to its sides. One end of the cassette moves to exchange elements The filter also contains means of spraying water upstream of the active carbon filters, at the outlet to the cyclonic exchanger filter. A droplet filter is also placed upstream of the active carbon filters. The filter contains several active carbon filters of different microporosity arranged in decreasing size in the direction of gas flow. The first of these has micropores of 30nm and the second of 10nm. The active carbon fibre filter has a microporisity of at most 1nm. At least one element is made of active carbon tissue, supported by a support material which is permeable to the gas. This support is a mesh, net or metal tissue. The active carbon fibres are generally wavy and the active carbon filters are mounted inside a cylindrical or parallelpiped cassette. These cassettes are heated by infrared radiation of less than 2 mu m wavelength, to raise the temperature during desorption.
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