Method for controlling the particulate size distributions of the solids inventory in a circulating fluidized bed reactor

Patent · Tue May 16 04:00:00 EDT 1989

OSTI ID:5624703

Alliston, M G; Reed, K A

A method is described of controlling the particle size distribution in a fluidized bed reactor comprising the steps of establishing a primary bed of particulate material having a varying size and including fuel, introducing air into the primary bed to fluidize the material and promote the combustion of the fuel, adding additional particulate material including fuel to the primary bed, discharging a portion of the particulate material from the primary bed into a secondary bed, introducing air to the secondary bed at a velocity sufficient to fluidize the particulate material and entrain relatively fine portions of the particulate material, passing the air and the entrained relatively fine portions of the particulate material from the secondary bed to the primary bed, and varying the velocity of the air introduced to the secondary bed to vary the amount of the entrained relatively fine relatively fine portions of the particulate material and thus control the size of the material in the primary bed.

• Assignee: Foster Wheeler Energy Corp., Clinton, NJ
• Patent Number(s): US 4829912
• OSTI ID: 5624703
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
BOILERS
CHEMICAL REACTIONS
COAL FINES
COMBUSTION
DESIGN
EQUIPMENT
FLUIDIZED BED BOILERS
FLUIDIZED-BED COMBUSTION
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
OXIDATION
PARTICLE SIZE CLASSIFIERS
THERMOCHEMICAL PROCESSES