Control apparatus for air blast preheaters of blast furnaces

Details Control apparatus for air blast preheaters of blast furnaces Control apparatus for air blast preheaters of blast furnaces

1974-03-22

1976-11-30

Nilson, Robert G.

Fluid handling

Systems

Dividing into parallel flow paths with recombining

13762538, 13762568, 266197, F16K 326

Patent

active

039943151

ABSTRACT:
In a blast preheater for a blast furnace, a control housing has at least one open ended cylinder vertically mounted therein. The cylinder, or each of several cylinders has several axially spaced rows of circumferentially spaced slots, extending through the wall of the cylinder. A slider is slidable in the cylinder for opening, restricting or closing such slots. Wall means are mounted in the housing and are so arranged that in each position of the slider, a first part of the housing surrounding at least one of said rows of slots is separated by the wall means from at least one other part of the housing which communicates with the interior of the cylinder. Separate connectors communicate respectively with the so separated parts of the housing and connect the same to different parts of the blast preheater system, such as the inlet for cold air, under pressure; the inlet for combustion gas, for starting the preheater under lower pressure; the outlet for flue gas from the preheater; and the preheater outlet connecting the hot blast to the blast furnace. One of the new control housings can be provided for each of these lines, or for several of them. The new cylinder and slider system serves to fully open or fully close the line and also to regulate the line by restricting the slots.

REFERENCES:
patent: 89399 (1869-04-01), Gilbert
patent: 669284 (1901-03-01), Pelton
patent: 1675307 (1928-06-01), Dake
patent: 1679257 (1928-07-01), Neebe

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