Process and apparatus for the recovery of oil from shale by indirect heating
A system is disclosed for recovering oil from oil-bearing shale rock in which shale is placed on a traveling grate and transported through a preheating zone, a retorting zone where oil is educted from shale, a combustion zone where residual carbon in the shale after the oil is removed, is burned, and a cooling zone. A first gas stream, which may be air, is passed through shale that has traveled on the grate at least to where combustion takes place. This air is thereby heated, and then used to heat a heat-transfer media such as alumina balls from which a second and oxygen-free gas stream extracts the heat. The second gas stream, heated indirectly by the first gas stream but not contaminated with combustion gases from the first gas stream, passes through the shale in the retorting zone to educt oil from the shale and then through the shale in the preheating zone where the educted oil is condensed and becomes suspended as a stable mist in the second gas stream from which the oil may be mechanically separated. 3 claims, 2 figures.
- Assignee:
- Allis-Chalmers Manufacturing Co.
- Patent Number(s):
- US 3644193
- OSTI ID:
- 5235679
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
040402* -- Oil Shales & Tar Sands-- Surface Methods
BITUMINOUS MATERIALS
CARBON
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COMBUSTION
DESIGN
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HEATING
MINERAL OILS
NONMETALS
OIL SHALES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDATION
PRODUCTION
RECOVERY
REMOVAL
RETORTING
RETORTS
SHALE OIL
SYNTHETIC FUELS
SYNTHETIC PETROLEUM