Process and apparatus for preheating coal intended for use in co

Details Process and apparatus for preheating coal intended for use in co Process and apparatus for preheating coal intended for use in co

1978-11-07

1980-05-13

Richman, Barry S.

Distillation: processes, thermolytic

With measuring, testing or inspecting

34 56, 201 41, 202262, 202270, 414161, 422111, C10B 5710, C10B 3100, C10B 2900, C10B 4500

Patent

active

042027330

ABSTRACT:
Coal is preheated prior to passing it into a coking installation by feeding measured amounts of the relatively wet coal into and through one or more circulation dryers heated to an elevated temperature and collecting the hot coal in a collecting bin and automatically measuring the level of the hot coal in said bin and automatically adjusting the amount of coal fed into said dryer depending on the level of coal measured in said collecting bin. Means are provided for preventing further adjustment of the coal feed rate should the exhaust gas temperature of a dryer fall outside the limits of a preselected preset temperature range and to bring the process back under level-actuated feed rate control once the exhaust gas temperature moves back within the preset range.

REFERENCES:
patent: 2673832 (1954-03-01), Lassiat
patent: 2677604 (1954-05-01), Nelson
patent: 2834658 (1958-05-01), Lieffers et al.
patent: 3216595 (1965-11-01), Wethly
patent: 3427138 (1969-02-01), Donnelly et al.
patent: 3523065 (1970-08-01), Schmidt
patent: 3761360 (1973-09-01), Auvil et al.
patent: 3951750 (1976-04-01), Drebes

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