Japanese Patent JPH025927

B2

PCT No. PCT/SE81/00034 Sec. 371 Date Sep. 28, 1981 Sec. 102(e) Date Sep. 28, 1981 PCT Filed Feb. 3, 1981 PCT Pub. No. WO81/02258 PCT Pub. Date Aug. 20, 1981.A method and a device, FIG. 1, for sealing an opening (15, 8, 10) between two zones in a fluidized bed and/or between the bed and its surrounding (22). In the bed particles (2) are intended to be maintained suspended by means of a carrier gas, which is introduced in the bottom (3) of the bed below the level of aid opening (15, 8, 10). Through said opening (15, 8, 10) primarily workpieces (66) intended to be treated in the bed are intended to pass, which opening (15, 8, 10) is, for example, a horizontal gap in a vertical partition wall (11, 9) between the zones (12, 13, 14) or between the bed and its surrounding (22). The method according to the invention is characterized in that a heap (19, 27) or several heaps (19, 27) of particles (2), by utilizing the movements of the particles (2) and carrier gas in the bed, are caused to be built up at said opening (15, 8, 10) to such a height that the opening (15, 8, 10) is covered or substantially covered by the heap/heaps (19, 27) of particles (2). Workpieces (6) during their passage through the opening (15, 8, 10), and therewith through the sealing, demolish the heap/heaps (19, 27), whereafter said heap/heaps (19,27) are built up again during and/or after the passage of the workpieces (6).

SUTOOFUAA RONARUDO DEII

JP50068681A

February 06, 1990

January 13, 1981

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BOWLES FLUIDICS CORP

B01J8/36; B01J8/26; B05B1/08; B60R1/02; C21D1/53; F15C1/22; F27B15/02

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