Overflow Pipe and Partition Plate in Fluidized Bed with Multi-Stages and Multi-Rooms

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  • 多段多室連続流動層における溢流管と分割板について
  • タダン タシツ レンゾク リュウドウソウ ニ オケル イツリュウカン ト ブン

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Abstract

An investigation was carried out to obtain the stabilizing conditions for the flow of solid particles in a continuous fluidized bed both with overflow pipes and partition plates, using a cold model made of glass.<BR>(1) Amounts of gas introduced into overflow pipe, when l>l'>7.5, qb≥qmf and qc≥qmf were given by the following equations.<BR>In batch operation, In continiuous operation, qb=Qp (d'/D) 2ψb.<BR>In continiuous operation, qc=Qp (d'/D) 2ψc-F/ρs (1-εf) ·103<BR>It was suggested that qc must be nearly equal to qmf in order to maintain the stabilization of gravity flow of solids through the overflow pipe.<BR>(2) The pressure difference, at a level, between the beds separated by a partition plate was decreased with increasing the height above the gas distributor.<BR>In order to minimize the height difference in these two beds, the partition plate with a slit at lower level was effective.<BR>(3) It was suggested that the overall solid mixing behavior in two fluidized rooms, separated by the partition plate with a partially formed moving bed of solid particles, was similar to that expected for two complete mixing stages in series.

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  • Tetsu-to-Hagane

    Tetsu-to-Hagane 65 (2), 169-175, 1979

    The Iron and Steel Institute of Japan

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