Steam generator and method of operating a steam generator utilizing separate fluid and combined gas flow circuits

Patent · Tue May 19 04:00:00 EDT 1987

OSTI ID:6416285

Seshamani, V; Cambell, W R; Moore, P E

A method is described of operating a steam generator. The method comprises the forming a first bed of particulate material in a vessel, forming at least one additional bed of particulate material in the vessel, introducing air and fuel into each of the beds to fluidize the beds and promote the combustion of the fuel, establishing a first flow circuit for passing water in a heat exchange relation to the additional bed for converting the water to steam, combining a mixture of flue gases and the entrained particulate material from the additional bed with that of the first bed, separating the entrained particle materials from the flue gases of the combined mixture, passing the separated particles back into the first bed, passing the steam to external equipment for using the steam, establishing a second flow circuit independent of the first flow circuit for receiving the steam from the equipment, and passing the separated flue gases in a heat exchange relation with the second flow circuit for reheating the steam.

• Assignee: Foster Wheeler Energy Corp., Livingston, NJ
• Patent Number(s): US 4665864
• OSTI ID: 6416285
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
AIR FLOW
BOILERS
CHEMICAL REACTIONS
COMBUSTION
DESIGN
DISPERSIONS
ENERGY TRANSFER
FEEDWATER
FLUE GAS
FLUID FLOW
FLUIDIZATION
FUEL-AIR RATIO
GAS FLOW
GASEOUS WASTES
HEAT TRANSFER
HYDROGEN COMPOUNDS
LIQUID FLOW
MIXTURES
OPERATION
OXIDATION
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
STEAM
STEAM GENERATORS
THERMOCHEMICAL PROCESSES
TWO-PHASE FLOW
VAPOR GENERATORS
WASTES
WATER