Fluidized bed combustion heat transfer enhancement

Patent · Tue Feb 13 04:00:00 EST 1990

OSTI ID:6916617

Brian, P L.T.; Dean, Jr, S W

This patent describes a process for operating a fluidized bed combustion reactor which is surrounded by water-cooled tubes. It comprises: introducing a solid fuel and an oxygen-containing gas into the reactor; burning the fuel in the presence of the oxygen-containing gas and a material having inert particles of spheroidal shape possessing a Moh's hardness of between 2 and 4 and a particle diameter of about 50 to 1000 {mu}m to form a hot exhaust gas containing solid particles; discharging the hot exhaust gas containing the solid particles from the reactor and cooling the exhaust gas by indirect heat exchange against the water cooled tubes of the reactor; and separating and recycling a portion of the separated solid particles into the fluidized bed reactor whereby erosion of the water-cooled tubes is substantially reduced.

• Assignee: Air Products and Chemicals, Inc., Allentown, PA
• Patent Number(s): A; US 4899695
• Application Number: PPN: US 7-310560A
• OSTI ID: 6916617
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200104 -- Fossil-Fueled Power Plants-- Components
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
CORROSION PROTECTION
EFFICIENCY
ENERGY SOURCES
ENERGY TRANSFER
ENRICHMENT
EXHAUST SYSTEMS
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUELS
HEAT EXCHANGERS
HEAT TRANSFER
HYDROGEN COMPOUNDS
MATERIALS
OXIDATION
OXYGEN COMPOUNDS
OXYGEN ENRICHMENT
PARTICLES
PARTICULATES
THERMAL EFFICIENCY
THERMOCHEMICAL PROCESSES
WATER