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Low NOx fuel gas burner based on venturi tubes

A technology of gas burner and Venturi tube, which is applied in the direction of gas fuel burner, burning with multiple fuels, burner, etc. It can solve the problems of poor flame stability, NOx limitation, high temperature, etc., and achieve optimal heat flux Conditions, lower local combustion temperature, enhanced mixing effect

Inactive Publication Date: 2014-01-01
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
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  • Application Information

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Problems solved by technology

Although these three methods can reduce the formation of NOx to a certain extent, there will be local high temperature phenomenon when the gas flow at the outlet of the burner is not completely uniform, and the stability of the flame is not good, which greatly limits the reduction of the formation of NOx

Method used

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  • Low NOx fuel gas burner based on venturi tubes
  • Low NOx fuel gas burner based on venturi tubes
  • Low NOx fuel gas burner based on venturi tubes

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Embodiment 1

[0038] A low NOx gas burner based on Venturi tube, see figure 1 , figure 2 , image 3 as well as Figure 4 , including a burner body 11 with a cavity, a first-stage burner 6 , a second-stage burner 7 , an insulating tile 8 and a Venturi tube 9 .

[0039] The longitudinal central axis of the heat insulating tile 8 is provided with a first passage 81, and the periphery of the first passage 81 is provided with a second passage 82 at equal intervals. The lower end of the heat insulating tile 8 is connected to the burner body 11 The upper end is connected, and the first channel 81 communicates with the cavity of the burner body 11 .

[0040] The upper end of the first channel 81 is provided with a constriction 811 whose cross section gradually decreases, and the angle a between the slope of the constriction 811 and the horizontal plane is 40°-70°, forming a constriction flow channel and strengthening the connection between the gas and the combustion-supporting air. Mixing, whi...

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Abstract

The invention disclose a low NOx fuel gas burner based on venturi tubes, which comprises a burner body, primary burners, secondary burners, a thermal insulation tile and the venturi tubes, wherein a first passage and a second passage are arranged on the thermal insulation tile; the thermal insulation tile is connected with the burner body; the first passage is communicated with a cavity of the burner body; necking mouths are formed in the first passage; primary fuel injection nozzles and secondary fuel injection nozzles are respectively arranged at the top ends of the primary burners and the secondary burners; the venturi tubes and the primary burners are arranged in the first passage; the secondary burners are arranged in the second passage; the top end surfaces of the primary fuel injection nozzles and the top end surfaces of the venturi tubes are parallel, and are arranged in the first passage respectively. Through the adoption of the design of the hierarchic arrangement of the venturi tubes, the necking mouths and the burners, the problem that local high temperature produced in a conventional fuel gas burner due to the nonuniform mixing of the fuel gas and combustion air in a furnace chamber can be overcome, meanwhile the flame stability of the burner is improved, and the generating of NOx is reduced.

Description

technical field [0001] The invention belongs to the field of combustion equipment for industrial furnaces, in particular to a venturi tube-based low NOx gas burner. Background technique [0002] The burner is the main component of the combustion equipment of the industrial furnace. The NOx produced by its combustion is one of the main factors causing environmental pollution. As the country pays more and more attention to environmental protection, the level of NOx generation has become a measure of the combustion performance of the burner. one of the important indicators. [0003] According to different fuels and combustion conditions, the NOx generated during the combustion process is mainly divided into three types, namely, fuel-type NOx, thermal NOx and fast-type NOx. The NOx generated during gaseous fuel combustion is mainly fuel-type NOx and thermal NOx. Therefore, controlling the generation of NOx for burning gaseous fuel is mainly to control the generation of thermal ...

Claims

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Application Information

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IPC IPC(8): F23C5/08F23D14/02F23D14/58
Inventor 陈冬林杨建波吴雪晴
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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