Process for heating solids in a transfer line

Details Process for heating solids in a transfer line Process for heating solids in a transfer line

1983-08-15

1985-04-30

Camby, John J.

Heating

Processes of heating or heater operation

Including passing, treating or conveying gas into or through...

34 10, 209 11, 432 13, 432 16, F27B 1500, F26B 308

Patent

active

045141681

ABSTRACT:
Oil shale, coal, inert heat transfer material and other carbon-containing solids of varying sizes are preheated with a gas in a transfer line by first separating the solids into a plurality of size fractions and then separately introducing the size fractions into the transfer line at predetermined distances from the transfer line inlet. The predetermined distances are inversely related to the size of the particles comprising each fraction of solids so that the fraction of solids containing the largest particles is introduced nearest to the gas inlet and the fraction of solids containing the smallest particles is introduced at a point furthest away from the transfer line inlet. Normally, solids withdrawn from the transfer line will have been heated to a temperature below which any liquids or gases evolve and are ready for further processing in downstream conversion units such as oil shale retorts, coal gasifiers and the like.

REFERENCES:
patent: 2680091 (1954-06-01), Barr et al.
patent: 2956347 (1960-10-01), Gordon
patent: 3004898 (1961-10-01), Deering
patent: 4028222 (1977-06-01), Prull
patent: 4366046 (1982-12-01), Bertelsen et al.
patent: 4424021 (1984-01-01), Merrill, Jr.
patent: 4436589 (1984-03-01), Petrovic et al.

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