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Air duct structure of pulverized coal burner

Air duct structure of pulverized coal burner
Jul 06, 2022 Category: Product Category Page Views: 14 Author: EBICO Burner

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(1) External axial flow air duct

 

The nozzle of the outer axial flow duct adopts semicircular hole structure, which has a certain inclined taper, reduces the wind resistance and improves the injection intensity. The external axial wind is sprayed through the semi-conical holes intermittently, and the high-speed air sprayed can completely absorb the high-temperature secondary air. The outlet area of the external axial flow duct can be stepless adjusted, and then the outlet wind speed of the external axial flow wind can be adjusted.

 

(2) pulverized coal air duct

 

Pulverized coal air duct is arranged between the external axial flow air duct and the cyclone air duct. The pulverized coal diffuses rapidly under the action of external axial wind and cyclone and burns rapidly. At the same time, the axial wind and swirling wind can control the direction and distribution of coal powder in the kiln, and effectively adjust the flame shape and flame temperature distribution.

 

(3) Cyclone air duct

 

The cyclone pipe is arranged inside the pulverized coal pipe. Whirlwind through a number of conical semicircle spiral groove spray a number of high-speed whirlwind, cyclone effect, so that the coal quickly dispersed from the burner, reduce the concentration of coal powder, improve the contact time and contact area of coal powder and air, so that the coal can quickly combustion, improve the combustion efficiency of coal powder. The outlet area of the cyclone pipe can be stepless adjusted, and then the outlet wind speed of the external cyclone can be adjusted.

 

(4) Eddy current air duct

 

The vortex duct is arranged inside the vortex duct, and the vortex wind is sprayed through a plurality of spiral Angle cyclones. By adjusting the axial displacement, the jet Angle of the eddy wind can be adjusted to adjust the shape of the flame. Through the whirlwind, the burning flame is more concentrated and the flame is more stable.

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