Process for the pyrolysis of coal in dilute- and dense-phase flu

Details Process for the pyrolysis of coal in dilute- and dense-phase flu Process for the pyrolysis of coal in dilute- and dense-phase flu

1977-03-14

1980-07-01

Scovronek, Joseph

Distillation: processes, thermolytic

By conduction using preheated charge container or preheated...

Particulate disparate solid

165104F, 201 16, 201 31, 201 44, 208 8R, 422145, 422146, 422206, 422213, C10B 2300, C10B 4922, C10G 102

Patent

active

042104920

ABSTRACT:
A process for pyrolysis of coal wherein the subdivided coal is preheated, pyrolyzed, and subjected to heat recovery after pyrolysis, heat transfer being effected by contacting the subdivided coal as a dilute-phase fluidized bed in the first stage of dual preheating zones with a first particulate heat carrier, with a second particulate heat carrier in a dense-phase fluidized bed in the second preheating stage, followed by pyrolysis in a dense-phase fluidized bed pyrolysis zone. The separate particulate heat carriers are employed in such manner that one mass of heat carrier is utilized for preheating the subdivided coal in the first stage and heat recovery, and a second mass of heat carrier is utilized for pyrolysis of the coal and the second stage preheating.

REFERENCES:
patent: 1669023 (1928-05-01), Aunge
patent: 2560403 (1951-07-01), Arveson
patent: 2725348 (1955-11-01), Martin et al.
patent: 2743216 (1956-04-01), Jahnig et al.
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patent: 3047472 (1962-07-01), Gorin et al.
patent: 3076751 (1963-02-01), Minet
patent: 3574065 (1971-04-01), Eddinger et al.
patent: 3853498 (1974-12-01), Bailie
patent: 3855070 (1974-12-01), Squires
patent: 3921307 (1975-11-01), Marek et al.
patent: 4064018 (1977-12-01), Choi

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