Circulating fluidized bed combustor with bottom ash re-injection

Details Circulating fluidized bed combustor with bottom ash re-injection Circulating fluidized bed combustor with bottom ash re-injection

1994-01-07

1995-05-16

Yuen, Henry C.

Furnaces

With fuel treatment means

Preliminary refuse treatment means

110245, 122 4D, F23G 502

Patent

active

054151112

ABSTRACT:
A process is set forth for directly controlling the quantity and particle size distribution of the solid inventory inside a circulating fluidized bed combustor. A portion of the bed ash is withdrawn from the combustor as bottom ash. The particle size distribution of the stream is adjusted, such as by a hammermill, to a specified distribution. Finally, a portion of the adjusted ash is re-injected into the combustor. The process may be facilitated by size classifying the bottom ash prior to size reduction.

REFERENCES:
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patent: 4552203 (1985-11-01), Chrysostome et al.
patent: 4648332 (1987-03-01), Goedhart
patent: 4733621 (1988-03-01), Kostamo et al.
patent: 4829912 (1989-05-01), Alleston et al.
patent: 4981111 (1991-01-01), Bennett et al.

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