Control system for a fluidized bed

Details Control system for a fluidized bed Control system for a fluidized bed

1985-01-14

1986-06-10

Yasich, Daniel M.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 15, 34 54, 34 57A, 73301, F26B 308

Patent

active

045934770

ABSTRACT:
A system for controlling the bed level of a fluidized bed independent of the density of the bed material using a minimum number of pressure sensors is disclosed. A pressure sensor is positioned at the base of the bed, at approximately eight feet above the distributor plate, and at one or more intermediate locations therebetween. The measurements from the foregoing sensors are selectively processed through the use of a specific logic arrangement to produce an output signal representative of the bed level of the fluidized bed.

REFERENCES:
patent: 2791906 (1957-05-01), Vetter
patent: 3064357 (1962-11-01), Butters
patent: 3186102 (1965-06-01), Brociner et al.
patent: 3473379 (1969-10-01), Stephens et al.
patent: 3849901 (1974-11-01), Sietmann et al.
patent: 3973437 (1976-08-01), Yanagihara et al.
patent: 4006635 (1977-02-01), Khoi
"Functional Diagramming of Instruments and Control Systems", Bailey Controls, SAMA Standard RC22-11-1966, (1981), pp. 1-12.

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