Two stage circulating fluidized bed reactor and method of operating the reactor
A method is described of operating a circulating fluidized bed combustion reactor, comprising: providing a substantially enclosed combustion reactor containing a fluidized bed of granular material; feeding combustible matter into the combustion chamber; supplying a first stream of pressurized air to the reactor through openings at the bottom of the combustion chamber at a sufficient velocity to fluidize the granular material and the matter in the circulating regime for combusting a minor portion of the matter in the chamber; tangentially supplying a second stream of pressurized air into the reactor through openings in the cylindrically shaped interior side wall of the vessel for cyclonic combustion of a major portion of the combustible matter in the vessel; permitting the combustion product gases generated in the reactor to exit from the reactor via the exit throat in the cyclonic combustor vessel, while retaining substantially all of the granular material and uncombusted matter within the reactor; collecting the granular bed material and any uncombusted matter in the lower region of the cyclonic combustor vessel and returning it to the lower region of the combustion chamber; and controlling the combustion process in the reactor by controlling the flow of the first and second streams of air into the combustion chamber and the cyclonic combustor vessel, respectively, and by controlling the flow of granular bed material and matter to be combusted in the chamber and the vessel.
- Assignee:
- Donlee Technologies Inc., York, PA
- Patent Number(s):
- US 4688521
- OSTI ID:
- 6036862
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
421000* -- Engineering-- Combustion Systems
AIR FLOW
ALIGNMENT
CHEMICAL REACTIONS
CIRCULATING SYSTEMS
COMBUSTION
COMBUSTION CHAMBERS
COMBUSTION PRODUCTS
COMBUSTORS
CONTAINERS
CYCLONE COMBUSTORS
DESIGN
FLUID FLOW
FLUIDIZATION
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
GAS FLOW
GRANULAR MATERIALS
MATERIALS
OPENINGS
OPERATION
OXIDATION
PRESSURIZING
REYNOLDS NUMBER
THERMOCHEMICAL PROCESSES
TURBULENCE
VORTEX FLOW