Recirculating fluidized bed combustion system for a steam generator
The invention comprises a steam generator fluidized bed which recirculates through a major portion of the normal gas to fluid heat transfer circuits. Solid bed material is separated, collected and recirculated. Bed temperatures are limited by regulation of density of bed inert material to inhibit the radiant aspects of combustion. Gas recirculation is used to supplement air flow to achieve higher than entrainment bed gas velocity in the fuel ignition and reaction zone. Fuel ignition and reaction are controlled by limiting the amount of atmospheric air flow to the circulating fuel rich bed mixture to regulate extent of propagation of the ignition and reaction zone into the initial portion of the circulating bed loop, starting from the point of highest gas pressure.
- Assignee:
- Electrodyne Research Corporation
- Patent Number(s):
- US 4442795
- OSTI ID:
- 6339488
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
200104* -- Fossil-Fueled Power Plants-- Components
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
AIR FLOW
BOILERS
CHEMICAL REACTIONS
CIRCULATING SYSTEMS
COMBUSTION
COMBUSTION CONTROL
COMBUSTORS
CONTROL
DENSITY
ENERGY TRANSFER
EQUIPMENT
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLUID FLOW
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FOSSIL-FUEL POWER PLANTS
GAS FLOW
HEAT TRANSFER
IGNITION
OXIDATION
PHYSICAL PROPERTIES
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
STEAM GENERATORS
TEMPERATURE CONTROL
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
VAPOR GENERATORS