Steam generator having external fluidized bed combustion means

Details Steam generator having external fluidized bed combustion means Steam generator having external fluidized bed combustion means

1982-04-26

1984-01-10

Makay, Albert J.

Liquid heaters and vaporizers

Miscellaneous

110245, 110263, 431170, B09B 300

Patent

active

044247656

ABSTRACT:
The invention provides a means for more effectively adapting fluidized bed combustors for retrofit of existing boilers for burning of low grade inexpensive solid fuels. The operating discharge gas from a fluidized bed combustor is substantially lower in temperature from what exists at the furnace gas outlet of a conventional steam generator. Thus, outlet gas from fluidized bed combustors needs to be placed in the downstream gas path differently from conventional practice. The external combustors of the present invention permit placement of hot gas in the steam generator gas path where it can be effectively utilized. The invention also teaches how new steam generators can be configured advantageously to accommodate multiple fluidized bed combustors particularly as pertains to larger capacity steam generators in the 200 MW electrical and larger range.

REFERENCES:
patent: 3863606 (1975-02-01), Bryers et al.
patent: 4240377 (1980-12-01), Johnson
patent: 4314967 (1982-02-01), Kwon et al.
patent: 4336769 (1982-06-01), Daman
patent: 4338074 (1982-07-01), Johansson

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