Low-nitrogen combustor

A low-nitrogen burner and combustion cylinder technology, applied in the direction of burners, gas fuel burners, combustion methods, etc., can solve the problems of multiple nitrogen oxides, achieve uniform temperature, complete combustion, and improve the effect of disturbance

Pending Publication Date: 2020-07-28
HUAQIAO UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, unoptimized gas burners still produce more nitrogen oxides due to insufficient mixing of fuel and air. Therefore, there is still a lot of room for improvement in NOx emissions of natural gas burners, and there is still much room for reducing pollutants. Technical means of emission are yet to be developed

Method used

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Examples

Experimental program
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Embodiment Construction

[0031] Please check Figure 1 to Figure 5 , a preferred embodiment of the low-nitrogen burner, the low-nitrogen burner, which includes a hollow combustion cylinder 10, a gas injection mechanism 20 and a swirl mechanism 30.

[0032] like Figure 4 As shown, the combustion cylinder 10 includes an upper cylinder 11 and a lower cylinder 12 , the upper cylinder 11 and the lower cylinder 12 are connected by a stepped surface 13 , and the diameter of the upper cylinder 11 is larger than that of the lower cylinder 12 . The bottom opening of the lower cylinder 12 is an air inlet, that is, an air and gas inlet, and the top opening of the upper cylinder 11 is an air outlet for combustion products.

[0033] The gas injection mechanism 20 is fixed in the combustion cylinder 10, which includes a hollow injection body 21, a main gas distribution pipe 22, several surrounding gas distribution pipes 23 and an annular outlet pipe 24, and the main gas distribution pipe 22 is located in the injec...

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Abstract

The invention discloses a low-nitrogen combustor. A gas injection mechanism divides the fuel into a main fuel area located in the center and ejecting the fuel from a gas main nozzle and a peripheral fuel area located around and ejecting the fuel from an auxiliary gas outlet hole of an annular gas outlet pipe, part of combustion-supporting air is mixed with fuel gas of the main fuel area to form acentral combustion area, part of combustion-supporting air is mixed with fuel gas of the peripheral fuel area to form a peripheral combustion area, generation of nitrogen oxide can be inhibited through the peripheral combustion area, the combustion temperature is lower, and meanwhile the emission effect of the nitrogen oxide is reduced; a plurality of groups of auxiliary gas outlet holes which areannularly distributed are formed in the annular gas outlet pipe, so that the temperature of the peripheral combustion area can be more uniform, and the local high temperature can be avoided; and under the action of a rotational flow mechanism, negative pressure is formed in the central combustion area, timely backflow of high-temperature flue gas is guaranteed, combustion is more sufficient, flame disturbance is enhanced, and combustion efficiency is improved.

Description

technical field [0001] The invention relates to a low nitrogen burner. Background technique [0002] In recent years, my country's economy has grown rapidly, energy consumption has increased significantly, and the resulting environmental pollution has become increasingly serious. my country's environmental protection department has increasingly strict requirements on the emission limits of pollutants generated by combustion. For this reason, reducing nitrogen oxide emissions is one of the main goals of current gas burner design. [0003] At present, gas burners using natural gas as fuel in my country have been vigorously developed. Compared with coal-fired and oil-fired burners, natural gas burners have the advantages of safety, high efficiency, easy operation, and low pollutant emissions. However, unoptimized gas burners will still produce more nitrogen oxides due to insufficient mixing of fuel and air. Therefore, there is still a lot of room for improvement in NOx emiss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/04F23D14/58F23D14/70
CPCF23D14/04F23D14/58F23D14/70
Inventor 林继铭李浩蓁张勇杨建红房怀英张锋
Owner HUAQIAO UNIVERSITY
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