Fluidized bed boiler having a segmented grate

Details Fluidized bed boiler having a segmented grate Fluidized bed boiler having a segmented grate

1982-03-22

1984-06-12

Favors, Edward G.

Liquid heaters and vaporizers

Miscellaneous

110234, 110245, 110263, F22B 100

Patent

active

044534949

ABSTRACT:
A fluidized bed furnace (10) is provided having a perforate grate (9) within a housing which supports a bed of particulate material including some combustibles. The grate is divided into a plurality of segments (E2-E6, SH1-SH5, RH1-RH5), with the airflow to each segment being independently controlled. Some of the segments have evaporating surface imbedded in the particulate material above them, while other segments are below superheater surface or reheater surface. Some of the segments (E1, E7) have no surface above them, and there are ignitor combustors (32, 34) directed to fire into the segments, for fast startup of the furnace without causing damage to any heating surface.

REFERENCES:
patent: 3712369 (1973-01-01), Berlin et al.
patent: 3760776 (1973-09-01), Durrant
patent: 3863606 (1975-02-01), Bryers et al.
patent: 3881857 (1975-05-01), Hoy et al.
patent: 3905336 (1975-09-01), Gamble et al.
patent: 4183330 (1980-01-01), Bryers et al.
patent: 4211186 (1980-07-01), Pearce

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