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Heating process gas for indirect shale oil retorting through the combustion of residual carbon in oil depleted shale

Patent ·
OSTI ID:6429954
;
Hot oil depleted shale from an indirect oil shale retorting process is charged into the top of a vertical shaft furnace together with sufficient oxygen to combust the residual carbon in the shale. Recycle process gas is fed into the bottom of the furnace for direct heating by the spent shale. The heated recycle process gas and combustion gases are withdrawn from the furnace separately to minimize dilution of the high BTU process gas. A selected quantity of coarse, cooled spent shale discharged from the bottom of the furnace is recycled to the top to moderate the temperature of combustion.
Assignee:
Dravo Corp.
Patent Number(s):
US 4439307
OSTI ID:
6429954
Country of Publication:
United States
Language:
English

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Related Subjects

04 OIL SHALES AND TAR SANDS
040402 -- Oil Shales & Tar Sands-- Surface Methods
040900* -- Oil Shales & Tar Sands-- Waste management
BITUMINOUS MATERIALS
CARBON
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMBUSTION
CONTROL
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
EQUIPMENT
EXHAUST GASES
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLUIDS
FOSSIL FUELS
FUELS
FURNACES
GASEOUS WASTES
GASES
MATERIALS
NONMETALS
OIL SHALES
OXIDATION
POLLUTION CONTROL EQUIPMENT
RECYCLING
RETORTING
SPENT SHALES
TEMPERATURE CONTROL
THERMOCHEMICAL PROCESSES
WASTES