Method of filtration using semifluidized beds

Details Method of filtration using semifluidized beds Method of filtration using semifluidized beds

1982-08-10

1984-03-20

Hart, Charles N.

Liquid purification or separation

Processes

Separating

210807, 210289, B01D 2310

Patent

active

044380003

ABSTRACT:
A methfd of filtering fine solids from a fluid (gas or liquid) flowing upwardly through a chamber containing a semifluidized bed of discrete filter particles. During a filtering operation, the upper or packed section of the bed is immobilized by a porous retainer at the top of the chamber and, as the operation proceeds, the packed bed section gradually expands downwardly, and the fluidized bed section below it progressively decreases in size, thereby extending the duration of the filtration run and yielding a more uniform distribution of solids throughout the filter medium.

REFERENCES:
patent: 3374052 (1968-03-01), Fan et al.
patent: 4137162 (1979-01-01), Mohri et al.
patent: 4157959 (1979-06-01), Wen et al.
patent: 4253947 (1981-03-01), Fan et al.
patent: 4297218 (1981-10-01), Bals
patent: 4371442 (1983-02-01), Bals

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