Fines recirculating fluid bed combustor method and apparatus
This patent describes a method of burning solid particulate fuel and recovering useful energy therefrom. It comprises the steps of: maintaining a generally horizontal bed of inert particles, ash and some partially burned solid fuel particles on a distribution plate within an internal combustion chamber of a fluid bed combustor which also defines a freeboard immediately above the bed of particles; directing a continuous stream of fluidizing gas upward within the combustion chamber from below the distribution plate; capturing substantially all of the fine particles carried upward by the stream of fluidizing gas within a particle recycle separator which forms part of the combustor and which is positioned above the freeboard, and returning most of the captured particles to the fluidizing bed while exhausting the gas from the separator; recovering heat energy from combustion taking place in the fluidizing bed but not from the recycling path of fine particles; and operating the fluid bed combustor including its fluidizing bed and separator such that substantially all combustion of the fuel particles takes place only within the bed.
- Assignee:
- Combustion Power Co., Menlo Park, CA
- Patent Number(s):
- US 4843981
- Application Number:
- PPN: US 7-134959A
- OSTI ID:
- 5511355
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
014000* -- Coal
Lignite
& Peat-- Combustion
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
DESIGN
ENERGY RECOVERY
ENERGY SOURCES
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FUELS
MATERIALS
OPERATION
OXIDATION
RECOVERY
THERMOCHEMICAL PROCESSES