Fluidized bed steam generator and method of generating steam including a separate recycle bed

Patent · Tue Jul 28 04:00:00 EDT 1987

OSTI ID:6030785

Garcia-Mallol, J A; Alliston, M G

This patent describes a steam generator comprising a furnace section, means in the furnace section for receiving a plurality of vertically spaced beds of particulate fuel material, means for introducing air into the beds to fluidize the beds and promote the combustion of the fuel material, means for introducing additional fuel to each of the beds, the effluent gases from each of the beds rising upwardly into the areas above the bed. One boundary wall of the furnace section has openings for permitting the discharge of effluent gases from the areas above the beds. A method is described of operating a steam generator comprising the steps of establishing at least one bed of particulate material including fuel in a furnace, introducing air into the bed at a predetermined velocity to fluidize and promote the combustion of the material, adding additional particulate material including fuel to the bed, discharging effluent gases from the fluidized bed through a boundary wall of the furnace, the boundary wall serving as a common wall between the furnace and a heat recovery enclosure for receiving the discharged effluent gases.

• Assignee: Foster Wheeler Energy Corp., Livingston, NJ
• Patent Number(s): US 4682567
• OSTI ID: 6030785
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
BOILERS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTORS
ENERGY RECOVERY
EQUIPMENT
FLUE GAS
FLUID FLOW
FLUIDIZATION
FLUIDIZED BEDS
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FUEL FEEDING SYSTEMS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUELS
FURNACES
GAS FLOW
GASEOUS WASTES
HEAT RECOVERY
HEAT RECOVERY EQUIPMENT
OXIDATION
PARTICLES
PARTICULATES
RECOVERY
SOLID FUELS
STEAM GENERATORS
THERMOCHEMICAL PROCESSES
VAPOR GENERATORS
WASTES