High-speed combustor

Abstract

The invention discloses a high-speed combustor, particularly to a combustor in an industrial furnace. A fuel gas inlet is arranged in front of the combustor, the fuel gas inlet is connected with a fuel gas channel, an air inlet is arranged above the combustor, the air inlet is connected with an air channel, the air channel and the fuel gas channel are connected with a mixed channel, and the mixed channel is connected with a combustion chamber. The invention has the following characteristics: on the basis of convection heat transfer, high-temperature high-speed smoke flow from a high-speed combustor exit directly blows the surface of a workpiece to destroy an attached layer on the surface so as to increase the convective heat-transfer coefficient, thereby shrinking the hearth of the industrial furnace, improving heat efficiency, avoiding overheating and improving the quality of the heated metal.

Description

technical field [0001] The invention relates to a high-speed burner, in particular to a burner in an industrial furnace. Background technique [0002] Generally, high-temperature heating furnaces mainly rely on radiation heat transfer. To achieve rapid heating, the surface temperature of the inner wall of the furnace must be increased and the surface area must be increased. In addition, from the perspective of complete combustion, a larger furnace is also desired. However, the thermal inertia of an excessively large furnace It will bring two problems: one is that it consumes a lot of heat when starting; the other is that when the flame is turned off, the workpiece is still overheated by the radiation heat transfer of the furnace wall, and the workpiece is oxidized and decarburized, reducing the surface hardness and gloss of the material. Contents of the invention [0003] The object of the present invention is to overcome the above-mentioned deficiencies and provide a high...

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Problems solved by technology

[0002] Generally, high-temperature heating furnaces mainly rely on radiation heat transfer. To achieve rapid heating, the surface temperature of the inner wall of the furnace must be increased and the surface area must be increased. In addition, from the perspective of complete combustion, a larger furnace is also desired. However, the thermal inertia of an excessively large furnace It will bring two problems: one is that it consumes a lot of heat when starting; the other is that when the flame is turned off, the workpiece is still overheated by the radiation heat transfer of the furnace wall, the workpiece is oxidized and decarburized, and the surface hardness and gloss of the material are reduced.

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