Fluidized bed combustion device

Patent · Tue Aug 17 04:00:00 EDT 1982

OSTI ID:6797815

Chronowski, R A

A fluidized bed combustion device adapted for use with a boiler has an air distributor consisting of a row of generally horizontally oriented, apertured sparge pipes or tubes disposed in a bed of inert particulate material. The center pipes in the row are connected to a start-up burner for receiving heated combustion products and excess air and the outer pipes in the row are connected to selectively receive air through a separate delivery path. During start-up and low load conditions, only the center pipes are pressurized and so that only the center portion of the bed is fluidized to minimize the heat input requirements. Once the central 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 tubes are pressurized to fluidize the entire bed.

• Assignee: Aqua-Chem Inc
• Patent Number(s): US 4344372
• OSTI ID: 6797815
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
APERTURES
BOILERS
COMBUSTION CHAMBERS
COMBUSTORS
CONTROL EQUIPMENT
EQUIPMENT
FLUE GAS
FLUIDIZED-BED COMBUSTORS
GASEOUS WASTES
OPENINGS
PARTICLES
PARTICULATES
PIPES
SAND
WASTES