Combustion chamber for fluid-bed combustion

Details Combustion chamber for fluid-bed combustion Combustion chamber for fluid-bed combustion

1980-03-31

1982-01-26

Yuen, Henry C.

Liquid heaters and vaporizers

Miscellaneous

16510416, 110245, 34 57A, F22B 100, F28D 1300

Patent

active

043123023

ABSTRACT:
The bottom wall of a combustion chamber for fluid-bed combustion is formed as a membrane wall consisting of parallel tubes and fins welded between adjacent tubes, preferably in the common plane containing the tube axes. To the upper side of the tubes there are welded sheet metal strips perforated by relatively closely spaced orifices. In operation fluidizing and combustion air is injected into the combustion chamber from a plenum chamber located below the membrane wall through apertures, preferably elongate slits, in the fins of the membrane wall and the orifices in the overlying strips. A coolant flows through the tubes of the membrane wall whereby the bottom wall can be kept at a temperature which is so low and so uniform that warping of the wall will not occur even if the injection of air ceases. When the tubes of the membrane wall are connected in series or parallel with coolant carrying tubes in the side walls of the combustion chamber all walls can be maintained at essentially the same temperature so that the walls may be welded together to form a gas-tight structure enclosing the combustion chamber.

REFERENCES:
patent: 2518270 (1950-08-01), Barr
patent: 2884373 (1959-04-01), Bailey
patent: 2914388 (1959-11-01), Kelley
patent: 2997031 (1961-08-01), Ulmer
patent: 3411465 (1968-11-01), Shirai
patent: 3902550 (1975-09-01), Martin et al.
patent: 4136642 (1979-01-01), Novotny et al.

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