Method for producing a clean heated fluid
This patent describes an improved method for producing a clean heated fluid with a fluidized bed combustor having a bed zone of heated media particles and a freeboard zone above the bed, comprising: introducing a finely divided combustible fuel and an oxidizing gas into a lower region of the bed of heated media particles such that the fuel and gas are mixed, heated and dispersed for combustion; passing the fuel and gas and any resulting combustion gases through the bed to fluidize the media particles and mixing the media particles, oxidizing gas, combustion gas and combusting fuel. The heat of combustion creating a negative temperature gradient extending from the lower region of the bed of heated media particles upwardly through the freeboard zone; and, providing a separate flow of cooling fluid counter to the flow of the flue/gas mixture, the cooling fluid absorbing heat to enhance and regulate the negative temperature gradient.
- Assignee:
- Ohio State University, Columbus, OH
- Patent Number(s):
- US 4676733
- OSTI ID:
- 6082102
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
421000* -- Engineering-- Combustion Systems
COMBUSTION CONTROL
COMBUSTION HEAT
COMBUSTORS
CONTROL
ENERGY
ENTHALPY
FLUID FLOW
FLUIDIZATION
FLUIDIZED-BED COMBUSTORS
FUEL-AIR RATIO
GAS FLOW
HEAT
HEATING
LIQUID FLOW
MIXING
OXIDIZERS
PARTICLES
PARTICULATES
PHYSICAL PROPERTIES
REACTION HEAT
TEMPERATURE GRADIENTS
THERMODYNAMIC PROPERTIES