Fluidized bed combustor

Patent · Tue Jul 01 04:00:00 EDT 1986

OSTI ID:5511623

Daudet, H C; Bagley, W D

A fluidized bed combustor is described which consists of: a vertical housing; a bed of granular, generally non-combustible material disposed in a lower portion of the housing; means for delivering combustion air into the housing for upward flow through the bed to maintain the granular material in a fluidized state; means for delivering fuel to the bed for combustion therein to generate heat; heat exchanger means adopted to carry a cycle fluid and arranged in the housing for transferring heat of combustion to the cycle fluid, the heat exchanger means including first and second heat exchangers, the first heat exchanger immersed within the bed for promoting heat transfer primarily through solid-to-solid surface contact between the granular material and the first heat exchanger; the housing having a portion with a relatively large horizontal cross-section extending vertically above the bed for maintaining a relatively low superficial vertical velocity of combustion effluent therein to optimize the heat transfer by solid-to-solid contact; and a venturi disposed above the portion of the housing for substantially increasing the velocity of combustion effluent passing therethrough without disturbing the low superficial velocity of effluent in the portion of the housing.

• Assignee: Garrett Corp., Los Angeles, CA
• Patent Number(s): US 4597362
• OSTI ID: 5511623
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
AIR FLOW
COMBUSTION PRODUCTS
COMBUSTORS
CONVECTION
DESIGN
ENERGY TRANSFER
FLOW RATE
FLUID FLOW
FLUIDIZED-BED COMBUSTORS
GAS FLOW
GRANULAR MATERIALS
HEAT EXCHANGERS
HEAT TRANSFER
MASS TRANSFER
MATERIALS