Wedge-shaped air preheating combustor

Abstract

The invention discloses a wedge-shaped air preheating combustor. The combustor is provided with a main cylindrical combustion pipe, wherein an internal combustion nozzle is coaxially arranged in the inner cavity of the main combustion pipe; the inner cavity at one end of the internal combustion nozzle is gradually retracted and the end of the inner cavity at one end of the internal combustion nozzle is communicated with the inner cavity of the main combustion pipe; the other end of the internal combustion nozzle is hermetically connected with the end part of the main combustion pipe; a gas connecting pipe communicated with the inner cavity of the internal combustion nozzle is arranged on the sealed end part; an air inlet pipe is radially communicated with the external wall of the main combustion pipe close to the closed end; a plurality of air inlet holes are reserved on the external wall of the internal combustion nozzle far away from the closed end; the air inlet pipe is communicated with the inner cavity of the internal combustion nozzle through the main combustion pipe, and an interlayer and the air inlet holes of the internal combustion nozzle; and an installation flange is obliquely connected with the external wall of the main combustion pipe. An included angle of 40 to 45 degrees is formed between the installation flange and the axis of the main combustion pipe. When the combustor is arranged on a round industrial furnace, the flame sprayed from the internal combustion nozzle can enter along the tangential direction of the internal cavity of the furnace to fully stir the air flow in the furnace cavity, so that the temperature field of the furnace is uniform.

Description

Technical field: [0001] The invention relates to a preheating air wedge burner, in particular to a burner used for industrial heating and melting of full hydrogen bell furnaces, annealing furnaces and metal melting furnaces. Background technique: [0002] For the burner used in the existing industrial furnace, the central axis of the burner and the mounting flange are in the vertical direction, it is difficult to let the flame of the burner enter along the tangential direction of the industrial furnace, and it is impossible to disturb the air flow in the furnace cavity and realize its Uniformity of the temperature field. Existing burners are not easy to ignite in a cold state, or are easy to extinguish in a hot state. The burner in the existing burner is a trumpet design, the shape of the flame is uncontrolled, and the flame speed is low, which is not conducive to the flow of high-temperature air in the industrial furnace, resulting in uneven temperature. The thermal effic...

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Problems solved by technology

[0002] For the burner used in the existing industrial furnace, the central axis of the burner and the mounting flange are in the vertical direction, it is difficult to let the flame of the burner enter along the tangential direction of the industrial furnace, and it is impossible to disturb the air flow in the furnace cavity and realize its Uniformity of temperature field

Existing burners are not easy to ignite in cold state, or easy to extinguish in hot state

The burner in the existing burner is a trumpet design, the shape of the flame is uncontrolled, and the flame speed is low, which is not conducive to the flow of high-temperature air in the industrial furnace, resulting in uneven temperature

Existing burners have low thermal efficiency and waste energy

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