Method for drying coal and cooling coke

Distillation: processes – thermolytic – Quenching char with an inert material

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Details

34 10, 201 41, 432 15, C10B 3902, C10B 5710

Patent

active

044708785

ABSTRACT:
In a coking process, coal to be coked is preheated in a cascaded whirling bed drier into which the coal is charged from above and exposed to an indirect heat transfer while whirling in a coal-stream mixture. Hot gas applied to the heating pipes in respective cascades of the drier is branched off from the total amount of hot gases discharged from a dry cooler in which hot coke from the coke oven is cooled by recirculating cooler gas constituted by a partial gas stream discharged from the cascades of the drier and reunited with the other partial stream subject to a heat exchange for generating steam. Steam from the whirling beds is discharged from the cascaded drier, separated from the entrained dust particles, and then the excessive steam is drained in a branch conduit and the remaining steam is compressed and reintroduced into the lowermost whirling bed in the drier.

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patent: 3090131 (1963-05-01), Waterman
patent: 3728230 (1973-04-01), Kemmetmueller
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patent: 3830293 (1974-08-01), Bell
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patent: 4292743 (1981-10-01), Razus
patent: 4308102 (1981-12-01), Wagener et al.
patent: 4354903 (1982-10-01), Weber et al.

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