Process and apparatus for preheating coking coal

Details Process and apparatus for preheating coking coal Process and apparatus for preheating coking coal

1979-02-26

1981-02-17

Yuen, Henry C.

Heating

Processes of heating or heater operation

Including passing, treating or conveying gas into or through...

201 41, 202262, 34 57A, F26B 308

Patent

active

042512077

ABSTRACT:
Coking coal is preheated and dried by passing hot carrier gas into a generally vertical flash drying pipe, then passing comminuted coal into the same pipe, the carrier gas being blown with a flow speed to move the coal upwards in the pipe and passing at about the midpoint of the pipe a mixture of hot combustion gases and additional hot recycle gas branched off from the other hot waste gas line into the pipe so as to cause further heating and moving of the coal, the further heating being carried out in a uniform and gentle manner. At the end of the pipe the coal and carrier gas are separated and the coal is recovered while the waste gas are recycled into a blower and therefrom into the vertical flash drying pipe with a branch leading part of the recycle gas into a mixing chamber with the combustion gases so as to lower the temperature of the combustion gases when the same are passed into the pipe.

REFERENCES:
patent: 2763478 (1956-09-01), Parry
patent: 3732062 (1973-05-01), Porteus
patent: 3787171 (1974-01-01), Cromp
patent: 4101264 (1978-07-01), Barr
patent: 4102635 (1978-07-01), Beck
patent: 4139419 (1979-02-01), Limberg

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