Slagging combustion system

Patent · Tue Aug 11 04:00:00 EDT 1987

OSTI ID:6086309

Sheppard, D B; Solbes, A; Stansel, J C; Hill, L E

This patent describes an apparatus for the combustion of particulate carbonaceous fuel in a combustion zone and separation of the slag content of the fuel from the gaseous product of combustion, the combination of: (a) a metallic, fuel-cooled combustion chamber having its walls maintained at temperatures such that a layer of slag is maintained on the inside surfaces of the walls; (b) means for injecting oxidizer into the chamber in a manner to provide high velocity swirling flow of a mixture of oxidizer, fuel particles and combustion products within an annular portion of the combustion zone adjacent the inside surfaces; (c) means for introducing particulate carbonaceous fuel into the chamber at a relatively low velocity compared to that of the oxidizer and in a manner and direction to maintain a relatively fuel-rich stoichiometry within a longitudinally-extending central portion of the combustion zone; (d) means regulating the fuel input rate relative to the oxidizer input rate for providing rotational flow velocities, stoichiometric conditions and predetermined combustion temperatures within ranges such that most of the carbon contained in the fuel is converted to oxides of carbon and most of the non-combustibles present in the fuel are fused and deposited as liquid slag, thereby being separated from the gaseous products of combustion; (e) an apertured baffle positioned at the exit end of the combustion chamber; (f) a slag-recovery chamber coupled to receive products of combustion from the combustion chamber, the slag-recovery chamber being adapted to operate stoichiometrically; and (g) means for flowing gaseous products from the slag recovery chamber to an associated end-use equipment, the means including means to add supplementary oxidizer to the flowing gaseous products in the region of flow of the gaseous products to the associated end-use equipment.

• Assignee: TRW Inc., Redondo Beach, CA
• Patent Number(s): US 4685404
• OSTI ID: 6086309
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000 -- Coal
Lignite
& Peat-- Combustion
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
BAFFLES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COAL FINES
COMBUSTION
COMBUSTION CHAMBERS
CONTROL EQUIPMENT
DESIGN
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FURNACES
GAS FLOW
LAYERS
OPENINGS
OPERATION
ORIFICES
OXIDATION
OXIDES
OXIDIZERS
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
SLAGS
STOICHIOMETRY
THERMOCHEMICAL PROCESSES
VORTEX FLOW
WALLS