Combustion heater for oil shale

Furnaces – Refuse incinerator – With means for advancing or handling refuse or residue

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34171, 34174, 34175, 110225, 110229, 110302, 201 31, F23G 500

Patent

active

045399174

ABSTRACT:
A combustion heater for oil shale heats particles of spent oil shale containing unburned char by burning the char. A delayed fall is produced by flowing the shale particles down through a stack of downwardly sloped overlapping baffles alternately extending from opposite sides of a vertical column. The delayed fall and flow reversal occurring in passing from each baffle to the next increase the residence time and increase the contact of the oil shale particles with combustion supporting gas flowed across the column to heat the shale to about 650.degree.-700.degree. C. for use as a process heat source.

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