Use of control system for gas-solids contacting processes

Mineral oils: processes and products – Products and compositions – Lubricating oils

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34168, 201 1, 201 23, 201 29, 201 32, 201 34, 201 37, 201 38, 23230A, C10B 5306, C10G 102

Patent

active

040837700

ABSTRACT:
In gas-solids contacting processes involving the transfer of granular solids from a high-temperature, non-oxidizing treating zone through an enclosed conduit to a combustion zone, the transfer of gases between the treating zone and the combustion zone is prevented by using a novel steam sealing technique which avoids the use of mechanical sealing means and differential pressure controllers. Steam is injected into the system between the two contacting zones, and by the use of flow rate controllers and a pressure controller, a portion of such steam is forced at all times to flow through the combustion zone, while another portion thereof is withdrawn from the transfer conduit in admixture with a portion of net off-gas from the treating zone. The control system is particularly adapted for use in oil shale retorting, wherein coke on the retorted shale is burned in a combustion zone.

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patent: 3361644 (1968-01-01), Deering
patent: 3475319 (1969-10-01), MacLaren
patent: 3573194 (1971-03-01), Hopper
patent: 3972801 (1976-08-01), Gregoli
patent: 4003797 (1977-01-01), Cheadle et al.
patent: 4004982 (1977-01-01), Jennings et al.
patent: 4010092 (1977-03-01), Deering
patent: 4025416 (1977-05-01), Deering et al.

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