Two-stage centrifugal dedusting process
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United States of America Patent
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Nov 15, 1983
Grant Date -
N/A
app pub date -
Jul 21, 1981
filing date -
Jul 21, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A two-stage dedusting process is provided for dedusting heavy oil derived from solid hydrocarbon-containing material, such as oil shale, coal, or tar sand. In the process, heavy oil is fed to a first centrifuge where it is separated into a purified stream of heavy oil and a residual dust-enriched stream. The residual dust-enriched stream is fed to a second centrifuge where it is separated into a second purified stream of heavy oil and an even more highly concentrated, dust-enriched, second residual stream. Light oil derived from the solid hydrocarbon-containing material can be injected into the centrifuges to flush out the sticky dust-enriched residual streams. The concentrated, dust-enriched, second residual stream can be dried and combusted for use as solid heat carrier material in the retort.
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