Fluidized-bed combustor

Patent · Tue Dec 19 04:00:00 EST 1978

OSTI ID:6512646

Porter, J H

A coal-dolomite mixture is ground into particle-sized bits and fed into a downward sloping duct beneath the distributor plate in a fluidized-bed combustor. High velocity air is introduced through ports spaced at intervals along the bottom of the duct, thereby entraining the mixture in an air stream. The air and entrained solid is guided upward into a slot-like chamber which passes through the distributor plate and opens into the fluidized bed a distance above the plate. Vanes in the duct and chamber and baffles above the chamber exit control the flow of the air and entrained solids so that the coal--dolomite mixture is evenly distributed throughout the fluidized bed. The distributor plate is covered with a layer of high temperature alumina stones graded in size, with the coarse stones in closest contact with the plate and the fine stones on top, thereby shielding the plate from the high temperatures of the combustion zone and preventing the weeping of hot and ash burning coal particles onto the plate. The stones are large enough so that they do not fluidize.

• Assignee: Energy Resources Co., Inc.
• Patent Number(s): US 4130071
• OSTI ID: 6512646
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
DESIGN
DOLOMITE
ENERGY SOURCES
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FUELS
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERALS
OPERATION
OXIDATION
OXIDES
OXYGEN COMPOUNDS
RESERVOIR ROCK
ROCKS
THERMOCHEMICAL PROCESSES