Overflow Pipe and Partition Plate in Fluidized Bed with Multi-Stages and Multi-Rooms
Koji KAMIYA, Kazuyuki SAKURAYA, Isao MORINAKA, Nobuyasu KITAHARA, Masaya OZAWA, Minoru TANAKA
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.
(1) Amounts of gas introduced into overflow pipe, when l>l'>7.5, qb≥qmf and qc≥qmf were given by the following equations.
In batch operation, In continiuous operation, qb=Qp (d'/D) 2ψb.
In continiuous operation, qc=Qp (d'/D) 2ψc-F/ρs (1-εf) ·103
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.
(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.
In order to minimize the height difference in these two beds, the partition plate with a slit at lower level was effective.
(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.