Apparatus and method for feeding pulverized coal into an air lin

Details Apparatus and method for feeding pulverized coal into an air lin Apparatus and method for feeding pulverized coal into an air lin

1983-12-29

1986-04-15

Nase, Jeffrey V.

Conveyors: fluid current

With means to control conveying fluid or movement of load in...

Control of load input or output

177128, 177 50, 110104R, 406 24, B65G 5366

Patent

active

045824541

ABSTRACT:
Pulverized coal feed tanks are emptied in sequence via a transport line into the hot blast of a blast furnace. Each tank is carried by three load cells whose outputs are summed and differentiated to obtain the actual feed rate. Gas pressure in the tank is controlled in dependence on the actual feed rate so as to achieve a desired feed rate. To reduce the possibility of inaccurate feeding of coal, the outputs of the respective load cells are compared, and if deviation from a predetermined weight distribution over the load cells is detected, feed from the tank is stopped. The load cells may be duplicated in series, and the summed outputs of the two sets of load cells compared to detect malfunctioning of a load cell, again resulting in cessation of feeding from that tank.

REFERENCES:
patent: 3689045 (1972-09-01), Coulter et al.
patent: 4004647 (1977-01-01), Forst et al.
patent: 4027920 (1977-06-01), Wennerstrom

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