| 摘要 |
2123703 9312382 PCTABS00023 A combustion device (1) incorporated in an apparatus for combustion and/or decomposition of pollutants in air or other gases. The device has a stationary bed of e.g. sand having heat-accumulating and heat-exchanging properties. The bed is provided with heating means to heat a central part of the bed to the self-decomposition and/or the self-combustion temperature of the medium to be treated. The stationary bed (2) is placed on an essentially horizontal support (3), and at the remaining sides it is enclosed by side elements (4, 5) and a roof element (6), the latter resting directly on the upper face of the bed (2) so that the bed supports the roof element (6) and the loads to which the latter is exposed. Inside the bed upper, essentially horizontal tubes (7) are arranged as well as lower, essentially horizontal tubes (8), all said tubes being provided with valve systems at their ends. In this manner a stream of air or gas may be directed from one (8) of the perforated tubes, through the bed (2) and into the other (7) perforated tube in accordance with a first mode of operation. Combustion or decomposition of the pollutants is effected inside the bed. In accordance with a second mode of operation, the direction of flow through the bed may be reversed.
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