Pressurized downdraft gasifier

Patent · Tue Apr 21 04:00:00 EDT 1987

OSTI ID:6558869

Weaver, L E

A pressurized downdraft gasifier is described for extracting high quality gas products from solid carbonaceous fuels having low rates of gasification comprising; gasifying chamber means with a lower burning zone therein, gas lock means connected to the gasifying chamber means for supplying fuel and downdraft combustion air to the gasifying chamber means, ash collection chamber means connected to the gasifying chamber means to receive ash emanating from the burning zone through a throated zone in the bottom of the gasifying chamber means, a cylindrical grate bar assembly concentrically depending from the gasifying chamber means below the throated zone and extending downwardly into the ash collection chamber means, the cylindrical grate bar assembly including circular grate bars vertically-spaced from one another.

• Assignee: NOV; EDB-87-091895; NOV-87-058295
• Patent Number(s): US 4659340
• OSTI ID: 6558869
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
AIR FLOW
ANNULAR SPACE
ASHES
CHEMICAL REACTION YIELD
CHEMICAL REACTORS
COAL GAS
COAL GASIFICATION
COMBUSTION CHAMBERS
COMBUSTION CONTROL
CONFIGURATION
CONTROL
DESIGN
FLUID FLOW
FLUIDS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
GAS FLOW
GASES
GASIFICATION
MACHINE PARTS
MANAGEMENT
OPERATION
PRESSURIZING
RESIDUES
SHAFTS
SPACE
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
YIELDS