Process for circulating solid particles within a fluidization ch

Details Process for circulating solid particles within a fluidization ch Process for circulating solid particles within a fluidization ch

1985-04-19

1988-09-13

Davis, Jr., Albert W.

Heat exchange

Intermediate fluent heat exchange material receiving and...

Solid fluent heat exchange material

16510418, 422146, 122 4D, 34 57A, F28D 1300

Patent

active

047702370

ABSTRACT:
A process for circulating solid particles within a fluidization chamber, in which is formed a circulating fluidized bed comprising a dense lower zone (A) with a high concentration of particles, above which is located a dilute zone (B) containing particles carried along by the rising stream of a gas towards the upper part of the chamber (1), the latter opening into a circuit (4) for discharging the gases and particles, incorporating a device (41) for recovering the particles carried along, which is connected to the chamber (1) by means of a circuit (45) for recycling the recovered particles. In the upper part (12) of the fluidization chamber, the circulation speed of the cases is reduced before their discharge, so as to produce above the dilute zone (B) an upper zone (C) with a higher concentration of particles, in which some (35) of the particles escape from the stream of gas and fall in a shower along the side wall of the chamber, at the same time forming a descending annular film (34). The improved fluidization chamber for carrying out the process applies particularly to the combustion and/or gasification of combustible material.

REFERENCES:
patent: 2584391 (1952-02-01), Leffer
patent: 2698171 (1954-12-01), Schoenmakers
patent: 4191544 (1980-03-01), Boll et al.
patent: 4296800 (1981-10-01), Johnson
patent: 4550769 (1985-11-01), Bhojwani et al.

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