Shaft kiln burner and method

Abstract

The invention provides a shaft kiln burner and a method. The shaft kiln burner is characterized in that an air pipe (1) is arranged on the shaft kiln burner; an air inlet pipe (3) sleeves the air pipe (1); a gap is reserved between the air inlet pipe (3) and the air pipe (1); a fuel gas inlet (4) is formed in a pipe wall of the front end of the air inlet pipe (3); a plug (8) is arranged at one end, which is close to the fuel gas inlet (4), of the air inlet pipe (3); a mixing pipe (2) sleeves the air inlet pipe (3); a fuel gas opening (13) is formed in a pipe wall of the rear end of the mixing pipe (2); a mixed gas outlet (10) is formed in a pipe wall of the front end of the mixing pipe (2); a mixed gas outlet -a (11) is formed in a conical surface of the mixing pipe (2); a support (9) is arranged on a pipe wall of the front end of the mixing pipe (2); a connecting plate (6) is mounted on the outside of the mixing pipe (2); a secondary air pipe (14) sleeves the mixing pipe (2); a flange (7) is arranged at the rear end of the secondary air pipe (14) and is fixed with the connecting plate (6) through screws (5); and an air opening (12) is formed in a pipe wall of the secondary air pipe (14).

Description

Technical field: [0001] The invention specifically relates to a shaft kiln burner and a method thereof, which belong to the technical field of kiln combustion and are suitable for the combustion application of refractory materials. Background technique: [0002] As far as the inventor knows, the combustion device used in the current domestic shaft kiln sintering bauxite process is a diffusion combustion, and the commonly used diffusion combustion is that the gas-supporting gas and the gas are mixed while burning, and there are several disadvantages; the first is because the mixing is not good It will cause a surplus of supporting gas, increase the temperature of the exhaust gas and increase the heat loss of the kiln. The second is that the gas cannot be fully burned due to poor mixing, resulting in excess fuel, thus wasting fuel. The working method of the burner on the existing design combustion device is to sinter by the external flame under the condition of heat radiation...

AI Technical Summary

Problems solved by technology

[0002] As far as the inventor knows, the combustion device used in the current domestic shaft kiln sintering bauxite process is a diffusion combustion, and the commonly used diffusion combustion is that the gas-supporting gas and the gas are mixed while burning, and there are several disadvantages; the first is because the mixing is not good It will cause excess combustion gas, increase the temperature of the exhaust gas and increase the heat loss of the kiln

Second, due to poor mixing, the gas cannot be fully combusted, resulting in excess fuel, thus wasting fuel

The working method of the burner on the existing design combustion device is to sinter by the external flame under the condition of heat radiation, and at the same time, the highest temperature part is not on the sintered object on the kiln wall, and part of the heat energy is transferred by the inner kiln wall and the sintered object through radiation. It is not directly sintered by flame, so in the actual operation, the fire outlet of the kiln wall is particularly deformed due to sintering. In addition, the temperature inside the kiln wall is higher than the temperature of the sintered object, which is a waste of fuel

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