Heating – Processes of heating or heater operation – Including repairing – converting or assembling apparatus
Patent
1975-01-23
1976-05-18
Camby, John J.
Heating
Processes of heating or heater operation
Including repairing, converting or assembling apparatus
432 14, 432 95, 432 96, 432 99, F27D 116, F27B 1500, F27D 108
Patent
active
039574229
ABSTRACT:
The device and method of the invention embodies a shaft furnace containing no constrictions in the cross section of the shaft furnace that would unfavorably affect the movement characteristics in the filling. The arrangement of the pipes of the burning system in rings composed of closed arcuate pipe segments, adapted to the shape of the shaft furnace cross section and the provision of such pipes with a multiplicity of discharge openings for the fuel and the air of combustion which are uniformly distributed in intimate proximity to each other of horizontal rows of air and fuel pipes over the furnace periphery.
According to the invention it is also feasible to arrange, in dependency on the furnace height and the material to be heat-treated, several pairs of ring pipe lines for fuel and air of combustion, either directly on top of each other in close proximity or in different combustion planes. Controls are provided to make some closed pipes partly or totally inoperative or to operate intermittently, which measure contributes to the good mixing of fuel and air of combustion and thus to the control of the furnace temperature in the individual areas and permits a quick adaptation of the furnace operation to changed conditions. The device can be installed at any time in already existing shaft furnaces without great expense.
In order to avoid an overheating of the pipe lines, the latter are covered with shaped bricks toward the interior of the shaft furnace, with penetration openings which are in alignment with the openings in the pipe lines and agree therewith numerically. The penetration openings may be conically shaped and/or inclined in the direction toward the furnace base, which decreases substantially the clogging hazard of these openings caused by material passing along the shaft lining.
REFERENCES:
patent: 2539638 (1951-01-01), Schilling
patent: 3248206 (1966-04-01), Apple et al.
patent: 3721728 (1973-03-01), Luetzelschwab
patent: 3722871 (1973-03-01), Greaves
patent: 3849061 (1974-11-01), Summer
patent: 3887326 (1975-06-01), Townley
Camby John J.
Munz Otto John
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