Arrangement for burning fuels in a fluidized bed with an augment

Details Arrangement for burning fuels in a fluidized bed with an augment Arrangement for burning fuels in a fluidized bed with an augment

1987-12-22

1988-12-13

Warner, Steven E.

Liquid heaters and vaporizers

Miscellaneous

110204, 110245, 110263, 110347, F23C 1102

Patent

active

047902671

ABSTRACT:
A steam generator and a method of burning fuels therein. A combustion chamber of gas-tight pipe walls has a fluidized bed. Above the bed is a free space with an incrementally lower solids density that accommodates heat-convection surfaces. Coarse-particle precipitators communicate with the top of the combustion chamber with their solids-extraction outlet communicating with the fluidized bed through a feedback system. The combustion chamber, its heat-convection surfaces, the coarse-particle precipitators, and the feedback system are surrounded by pressurized vessel. The fuel is burned in the fluidized bed under pressure. Densities of 0.5 to 5 kg of solids per kg of flue gas are maintained in the free space (4) above the bed by means of fluidizing rates of 1 to 5 m/sec. The temperature of and load on the fluidized bed are regulated by the amount of solids returned to the bed.

REFERENCES:
patent: 4442795 (1984-04-01), Strohmeyer, Jr.
patent: 4584949 (1986-04-01), Brannstrom
patent: 4640201 (1987-02-01), Holmes et al.

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