Fluidized bed combustion method and apparatus

Patent · Tue Aug 10 04:00:00 EDT 1982

OSTI ID:6626396

Chronowski, R A

A fluidized bed combustion device adapted for use with a boiler has an air distributor consisting of a plurality of rows of generally horizontally oriented, apertured sparge pipes disposed in a bed of inert particulate material. The rows of pipes are vertically spaced apart with the upper row being connected to a start-up burner for receiving heated combustion products and excess air and the lower rows of pipes are connected to selectively receive air or inert gases through a separate delivery path. During start-up and low load conditions, only the upper row of pipes is pressurized and so that only the upper portion of the bed is fluidized to minimize the heat input requirements. Once the upper portion of the bed has been heated to the required temperature, primary fuel is delivered to sustain combustion without the start-up burner. At the completion of the start-up process and during high fire conditions all of the rows of tubes are pressurized to provide a deeper bed of fluidized material.

• Assignee: Aqua-Chem Inc
• Patent Number(s): US 4343247
• OSTI ID: 6626396
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
AIR
APERTURES
BOILERS
BURNERS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION PRODUCTS
COMBUSTORS
FLUID FLOW
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FLUIDS
FUELS
GAS FLOW
GASES
OPENINGS
OXIDATION
PARTICLES
PIPES
SPARGERS
THERMOCHEMICAL PROCESSES