Low-nitrogen burner for gas-fired boiler

Abstract

The low-nitrogen combustor comprises a machine body and a combustion pipe, one side of the machine body is communicated and connected with an air suction cover, a centrifugal wind wheel is arranged in an inner cavity of the air suction cover, an air suction opening is formed in the outer side wall of the air suction cover, the outer side surface of the air suction opening is detachably connected with a dust filtering plate, and the air suction opening is communicated with the combustion pipe. A driving rod is rotationally arranged in the center of the dust filtering plate and detachably connected with the centrifugal wind wheel, a brush plate is arranged on one side of the driving rod, and a servo motor is arranged on the side, opposite to the air suction cover, of the machine body. By means of the blast structure and the gas mixing mechanism, recombined air can be provided for fuel gas during combustion of the boiler and can be fully mixed with the fuel gas, so that the fuel gas of the boiler is fully combusted during combustion, production of nitrides is reduced, and the environmental protection property of the boiler during use is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a low-nitrogen burner for a gas boiler. Background Art

[0002] Nitrogen oxides are an important source of atmospheric pollution, causing acid rain, photochemical smog and haze, which are seriously harmful to the ecological environment and human health. With the increasing attention to environmental issues, the country's emission restrictions on boiler air pollutants are becoming increasingly stringent. In order to reduce the investment cost of boiler denitrification after combustion and the equipment operation and maintenance costs, the production mechanism of nitrogen oxides is analyzed. Through excellent structural design, the requirements for emission reduction in the boiler combustion stage can be achieved, and the purpose of low NOx emissions can be achieved on the basis of ensuring high combustion efficiency.

[0003] In order to achieve the purpose of low NOx emissions, existing gas boiler burners usually use a blower to blow outside air into the burner, so that the gas can burn from the peak, thereby reducing the production of nitrogen compounds. However, the outside air is complex and contains a lot of debris and dust. Blowing it into the burner will affect the combustion of the gas and increase the production of nitrogen compounds. If the filter structure is used for filtering for a long time, a lot of dust will accumulate on the surface, which will affect the blowing effect. For this reason, we propose a low-nitrogen burner for gas boilers. Utility Model Content

[0004] The main purpose of the utility model is to provide a low-nitrogen burner for a gas boiler, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A low-nitrogen burner for a gas boiler comprises a body and a combustion tube, wherein an air suction hood is interconnected on one side of the body, a centrifugal fan wheel is provided in the inner cavity of the air suction hood, an air suction port is opened on the outer wall of the air suction hood, a dust filter plate is detachably connected to the outer surface of the air suction port, a driving rod is rotatably provided at the center position of the dust filter plate, and the driving rod is detachably connected to the centrifugal fan wheel, a brush plate is provided on one side of the driving rod, and the inner wall of the brush plate is attached to the outer wall surface of the dust filter plate, a servo motor is provided on the side of the body opposite to the air suction hood, and the power output end of the servo motor is detachably connected to one side of the centrifugal fan wheel, and a gas mixing assembly is provided in the inner cavity of the combustion tube.

[0007] Furthermore, the gas mixing assembly includes a transmission rod rotatably arranged in the inner cavity of the combustion tube, and the transmission rod extends into the interior of the machine body. A stirring blade is fixedly connected to the surface of the transmission rod, and there are multiple stirring blades.

[0008] Furthermore, one end of the transmission rod relative to the stirring blade is fixedly connected with a transmission gear.

[0009] Furthermore, a driving gear is fixedly connected to the surface of the driving rod near the transmission rod, and the driving gear is meshingly connected to the transmission gear.

[0010] Furthermore, the front end of the machine body and the end of the combustion tube are both fixedly connected with a connecting plate.

[0011] Furthermore, a gas pipe is interconnected on one side surface of the combustion tube.

[0012] Furthermore, a sound insulation layer is provided on the inner side wall of the air suction hood.

[0013] Furthermore, a flame dividing plate is detachably connected to the front end of the combustion tube.

[0014] Compared with the prior art, the utility model has the following beneficial effects: 1. The utility model sets a servo motor, a driving rod, a centrifugal fan wheel, an air suction hood, a dust filter plate and a brush plate to cooperate with each other. The servo motor drives the centrifugal fan wheel to rotate with the help of the driving rod, thereby introducing external air into the burner through the air suction port, and the fuel gas inside the exhaust gas provides a combustion aid, thereby increasing the combustion effect of the burner, so that the fuel gas can be fully burned, reducing the generation of nitrogen compounds, and when blowing, the dust in the air is filtered with the help of the dust filter plate to prevent dust and debris from entering the burner with the air, thereby ensuring the purity of the air, improving the combustion effect, and ensuring that the burner can be fully burned. At the same time, during the blowing process, the brush on the surface of the dust filter plate can be synchronously driven with the help of the driving rod. The plate rotates, thereby cleaning the surface of the dust filter plate to avoid clogging of the cleaning plate, ensuring the blast effect, effectively improving the combustion effect of the burner, and reducing the generation of nitrides; 2. The utility model sets a driving rod, a driving gear, a transmission gear, a transmission rod and a stirring blade to cooperate with each other. When the servo motor drives the centrifugal wind wheel to rotate and blow air, the driving gear will drive the transmission gear and the transmission rod connected to the transmission gear to rotate, thereby driving the stirring blade to rotate, effectively stirring the inside of the burner, so that the air and the gas transported into the burner can be fully mixed, thereby further improving the combustion effect of the gas, allowing the gas to be further fully burned, further reducing the production of nitrides, and improving the environmental protection of the boiler when it is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the overall structure of a low-nitrogen burner for a gas boiler.

[0016] Figure 2 The utility model is a schematic structural diagram of a cross-sectional view of an air suction hood of a low-nitrogen burner for a gas boiler.

[0017] Figure 3 The utility model is a schematic structural diagram of a cross-sectional view of a body of a low-nitrogen burner for a gas boiler.

[0018] In the figure: 1. machine body; 2. servo motor; 3. connecting plate; 4. combustion tube; 5. air suction hood; 6. dust filter plate; 7. brush plate; 8. gas pipe; 9. centrifugal fan wheel; 10. air suction port; 11. driving rod; 12. driving gear; 13. transmission gear; 14. transmission rod; 15. stirring blade. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] like Figure 1-3 As shown, a low-nitrogen burner for a gas boiler comprises a body 1 and a combustion tube 4, one side of the body 1 is interconnected with an air suction hood 5, the inner cavity of the air suction hood 5 is provided with a centrifugal wind wheel 9, the outer wall of the air suction hood 5 is provided with an air suction port 10, the outer surface of the air suction port 10 is detachably connected with a dust filter plate 6, the center position of the dust filter plate 6 is rotatably provided with a driving rod 11, and the driving rod 11 is detachably connected to the centrifugal wind wheel 9, one side of the driving rod 11 is provided with a brush plate 7, and the inner side wall of the brush plate 7 is attached to the outer wall surface of the dust filter plate 6, the body 1 is provided with a servo motor 2 on the side relative to the air suction hood 5, and the power output end of the servo motor 2 is detachably connected to one side of the centrifugal wind wheel 9, the inner cavity of the combustion tube 4 A gas mixing component is provided; the servo motor 2 drives the centrifugal impeller 9 to rotate with the help of the driving rod 11, thereby introducing the outside air into the burner through the air inlet 10, and the combustion gas inside the exhaust gas provides a combustion aid, thereby increasing the combustion effect of the burner, so that the combustion gas can be fully burned, reducing the generation of nitrogen compounds, and when blowing, the dust in the air is filtered with the help of the dust filter plate 6 to prevent dust and debris from entering the burner with the air, thereby ensuring the purity of the air, improving the combustion aid effect, and ensuring that the burner can burn fully. At the same time, during the blowing process, the brush plate 7 on the surface of the dust filter plate 6 can be synchronously driven to rotate with the help of the driving rod 11, thereby cleaning the surface of the dust filter plate 6 to prevent the cleaning plate from being blocked, thereby ensuring the blowing effect.

[0021] Among them, the gas mixing component includes a transmission rod 14 rotatably arranged in the inner cavity of the combustion tube 4, and the transmission rod 14 extends to the inside of the body 1, and a stirring blade 15 is fixedly connected to the surface of the transmission rod 14, and there are multiple stirring blades 15; with the help of the rotating stirring blades 15, the air and gas inside the burner can be mixed to improve the combustion effect of the gas.

[0022] Among them, the transmission rod 14 is fixedly connected to a transmission gear 13 at one end relative to the stirring fan blade 15, and the driving rod 11 is fixedly connected to a driving gear 12 on the surface of the position close to the transmission rod 14, and the driving gear 12 is meshingly connected with the transmission gear 13; with the meshing connection between the driving gear 12 and the transmission gear 13, the servo motor 2 can drive the transmission rod 14 equipped with the stirring blade to rotate during the rotation process, and then the stirring blade is rotated to mix the air and gas inside the burner, thereby improving the combustion effect of the gas.

[0023] Among them, the front end of the body 1 and the end of the combustion tube 4 are fixedly connected with a connecting plate 3, the surface of one side of the combustion tube 4 is interconnected with a gas pipe 8, the inner wall of the air suction hood 5 is provided with a sound insulation layer, and the front end of the combustion tube 4 is detachably connected with a flame dividing plate; the body 1 and the combustion tube 4 can be disassembled by means of the connecting plate 3, so as to facilitate the later maintenance of the burner body, and the sound insulation board can reduce the assets caused, further improve the environmental protection effect, and the flame can be separated by the flame dividing plate during combustion, which solves the problem that the flame grading effect of the combustion tube 4 of the low-nitrogen burner is poor, the flame temperature cannot be effectively reduced, and the carbide emission is relatively large.

[0024] It should be noted that the utility model is a low-nitrogen burner for a gas boiler. When working, the body 1 is installed at the combustion position of the filter, and the combustion tube 4 is extended to the inside of the filter. During combustion, the gas is transported into the burner with the help of the gas pipe 8, and the gas is ignited with the help of a matching igniter to burn the gas. During combustion, the servo motor 2 drives the centrifugal wind wheel 9 to rotate with the help of the driving rod 11, so that the outside air is introduced into the burner through the air intake 10, and the gas inside the exhaust gas provides a combustion aid, thereby increasing the combustion effect of the burner, so that the gas can be fully burned and the production of nitrogen compounds is reduced. At the same time, the servo motor 2 drives the centrifugal wind wheel 9 to rotate during the blowing process, and the driving gear 12 drives the transmission gear 13 and the transmission rod 14 connected to the transmission gear 13 to rotate, thereby driving the stirring blades to rotate, effectively stirring the inside of the burner, so that the air and the gas transported into the burner can be fully mixed, thereby further improving the combustion effect of the gas, so that the gas can be further fully burned, further reducing the production of nitrogen compounds, and improving the environmental protection of the boiler when it is used.

[0025] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A low nitrogen burner for a gas boiler, comprising a body (1) and a combustion tube (4), characterized in that: A suction hood (5) is interconnected on one side of the machine body (1), a centrifugal fan wheel (9) is provided in the inner cavity of the suction hood (5), a suction port (10) is provided on the outer wall of the suction hood (5), a dust filter plate (6) is detachably connected to the outer surface of the suction port (10), a driving rod (11) is rotatably provided at the center of the dust filter plate (6), and the driving rod (11) is detachably connected to the centrifugal fan wheel (9), a brush plate (7) is provided on one side of the driving rod (11), and the inner wall of the brush plate (7) is attached to the outer wall surface of the dust filter plate (6), a servo motor (2) is provided on the side of the machine body (1) opposite to the suction hood (5), and the power output end of the servo motor (2) is detachably connected to one side of the centrifugal fan wheel (9), and a gas mixing component is provided in the inner cavity of the combustion tube (4).

2. A low nitrogen burner for a gas boiler according to claim 1, characterized in that: The gas mixing assembly comprises a transmission rod (14) rotatably arranged in the inner cavity of the combustion tube (4), and the transmission rod (14) extends into the interior of the machine body (1), and a stirring blade (15) is fixedly connected to the surface of the transmission rod (14), and there are a plurality of stirring blades (15).

3. A low nitrogen burner for a gas boiler according to claim 2, characterized in that: One end of the transmission rod (14) relative to the stirring blade (15) is fixedly connected to a transmission gear (13).

4. A low nitrogen burner for a gas boiler according to claim 1, characterized in that: A driving gear (12) is fixedly connected to the surface of the driving rod (11) near the transmission rod (14), and the driving gear (12) is meshingly connected to the transmission gear (13).

5. A low nitrogen burner for a gas boiler according to claim 1, characterized in that: The front end of the machine body (1) and the end of the combustion tube (4) are both fixedly connected with a connecting plate (3).

6. A low nitrogen burner for a gas boiler according to claim 1, characterized in that: A fuel gas pipe (8) is interconnected on one side surface of the combustion tube (4).

7. A low nitrogen burner for a gas boiler according to claim 1, characterized in that: The inner side wall of the air suction hood (5) is provided with a sound insulation layer.

8. A low nitrogen burner for a gas boiler according to claim 1, characterized in that: The front end of the combustion tube (4) is detachably connected with a flame dividing plate.

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