Heating process gas for indirect shale oil retorting through the

Details Heating process gas for indirect shale oil retorting through the Heating process gas for indirect shale oil retorting through the

1983-07-01

1984-03-27

Gantz, Delbert E.

Mineral oils: processes and products

Products and compositions

Lubricating oils

201 29, 201 34, 201 13, C10G 102, C10B 4902, C10B 5306

Patent

active

044393075

ABSTRACT:
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 The heated recycle process gas and combustion gases are withdrawn from the furnace separately to minimize dilution of the high BTU process gas.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.

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