Low-nitrogen combustor

Abstract

The utility model provides a low nitrogen burner which comprises a burner body and an exhaust pipe arranged on the outer side of the burner body, one side of the exhaust pipe is fixedly provided with an adapter pipe, one side of the adapter pipe is communicated with a first shunt pipe, and the outer side of one end of the first shunt pipe is communicated with a gas mixing pipe. According to the low-nitrogen burner, the first flow dividing pipes and the gas mixing pipes are distributed in a one-to-one correspondence mode, so that a low-pressure area is formed on the outer sides of the tail ends of the first flow dividing pipes in the process that air in the first flow dividing pipes flows into the gas mixing pipes, and then fuel gas conveyed into the gas mixing pipes from the connecting pipes can be mixed with the air; the gas mixing pipe is arranged in the gas mixing pipe, mixed gas can spirally flow while the flow speed of the gas in the gas mixing pipe can be slowed down through the spiral rod, it is ensured that gas and air can be fully mixed, the gas and the air are fully mixed and then combusted through the structure, and then the content of nitric oxide contained in smoke after gas combustion is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, and particularly discloses a low-nitrogen burner. Background Art

[0002] A low-nitrogen burner is a device that adds a blower, an induced draft fan, a frequency converter, a control valve, and multiple circuits to a traditional burner to allow clean energy and burner operation to provide more efficient heat energy for the boiler.

[0003] During use of existing low-nitrogen burners, the gas and air cannot be fully mixed before combustion, resulting in a high content of nitrogen oxides in the flue gas generated after the gas combustion. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, the present application aims to provide a low-nitrogen burner, comprising a burner body and an exhaust pipe arranged on the outside of the burner body, a transfer pipe fixedly installed on one side of the exhaust pipe, a first diverter pipe connected to one side of the transfer pipe, a gas mixing pipe connected to the outside of one end of the first diverter pipe, a connecting pipe connected to the outside of one end of the gas mixing pipe, an annular pipe located on the outside of the gas mixing pipe is connected through a second diverter pipe inside the connecting pipe, an air inlet pipe is connected to the bottom of the annular pipe, a burner is connected to the outside of one end of the gas mixing pipe away from the first diverter pipe, a combustion chamber is connected to the outside of the burner, an ignition rod is provided inside the middle of the combustion chamber, and a spiral rod is provided inside the gas mixing pipe between the first diverter pipe and the burner.

[0005] Preferably, the first diverter tubes are equidistantly distributed in an annular manner on one side of the transfer tube, and the outer side of each first diverter tube is connected to a gas mixing tube, and one end of the first diverter tube extends to the inside of the gas mixing tube away from the bottom end of the connecting tube.

[0006] Preferably, a conical platform is provided on the inner side of the transfer tube and is centrally distributed between the first diversion tubes.

[0007] Preferably, a limiting plate is provided on one side of the spiral rod and is symmetrically distributed and clamped on the inner side of the gas mixing tube. Beneficial effects

[0008] 1. The low-nitrogen burner distributes the first diverter pipe and the gas mixing pipe in a one-to-one correspondence, so that when the air inside the first diverter pipe flows into the gas mixing pipe, a low-pressure area will be formed on the outside of the tail end of the first diverter pipe, so that the gas transported from the connecting pipe to the gas mixing pipe can be mixed with the air. The spiral rod can slow down the gas flow rate inside the gas mixing pipe while allowing the mixed gas to flow in a spiral, ensuring that the gas and air can be fully mixed. This structure allows the gas and air to be fully mixed before combustion, thereby reducing the nitrogen oxide content in the flue gas after gas combustion.

[0009] 2. The low nitrogen burner can limit the spiral rod through the limiting plate and prevent the spiral rod from rotating after being installed inside the gas mixing tube, thereby ensuring that the spiral rod can effectively guide and mix the mixed gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0011] Figure 1 This is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the utility model;

[0014] Figure 4 This is a schematic structural diagram of the utility model.

[0015] In the figure: 1. Burner body; 2. Exhaust pipe; 3. Adapter pipe; 4. First diverter pipe; 5. Gas mixing pipe; 6. Connecting pipe; 7. Second diverter pipe; 8. Annular pipe; 9. Inlet pipe; 10. Burner nozzle; 11. Combustion chamber; 12. Ignition rod; 13. Screw rod; 14. Conical platform; 15. Limit plate. DETAILED DESCRIPTION

[0016] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the relevant utility model and are not intended to limit the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0017] The drawings in the embodiments of the present invention: different types of section lines in the drawings are not marked according to national standards, nor do they impose any requirements on the materials of the components. Instead, they are used to distinguish the cross-sectional views of the components in the drawings.

[0018] See also Figure 1-4 A low-nitrogen burner includes a burner body 1 and an exhaust pipe 2 arranged on the outside of the burner body 1. A transfer pipe 3 is fixedly installed on one side of the exhaust pipe 2. One side of the transfer pipe 3 is connected with a first diverter pipe 4. The outside of one end of the first diverter pipe 4 is connected with a gas mixing pipe 5. The outside of one end of the gas mixing pipe 5 is connected with a connecting pipe 6. The inside of the connecting pipe 6 is connected with an annular pipe 8 located on the outside of the gas mixing pipe 5 through a second diverter pipe 7. The bottom of the annular pipe 8 is connected with an intake pipe 9. The intake pipe 9 can transport gas to the inside of the annular pipe 8 and can be diverted by the second diverter pipe 7 and transported to the inside of the gas mixing pipe 5 through the connecting pipe 6. The outside of one end of the gas mixing tube 5 away from the first diversion tube 4 is connected to a burner 10, and the outside of the burner 10 is connected to a combustion chamber 11. An ignition rod 12 is provided inside the middle of the combustion chamber 11. The ignition rod 12 can ignite the mixed gas flowing out of the burner 10 inside the combustion chamber 11. The inside of the gas mixing tube 5 is provided with a spiral rod 13 located between the first diversion tube 4 and the burner 10. The spiral rod 13 can guide the mixed gas inside the gas mixing tube 5 while reducing the flow rate of the gas, so that the gas can be spirally transported around the spiral rod 13 to ensure that the gas and air can be fully mixed.

[0019] Among them, the first diversion pipes 4 are distributed in a circular and equidistant manner on one side of the transfer pipe 3, and the outside of each first diversion pipe 4 is connected to a gas mixing pipe 5. The first diversion pipe 4 extends to one end inside the gas mixing pipe 5 away from the bottom end of the connecting pipe 6. By adopting this structure to distribute the first diversion pipes 4 and the gas mixing pipes 5, the air pressure outside the tail end of the first diversion pipe 4 can be reduced during the process of the air inside the first diversion pipe 4 flowing into the gas mixing pipe 5, and then the flow of air under the action of the air pressure difference will not hinder the normal transportation of the gas, and the gas and air inside each gas mixing pipe 5 can be mixed separately and then discharged for combustion. In this process, the gas in the gas can be fully burned, thereby reducing the content of nitrogen oxides in the flue gas.

[0020] Among them, a conical platform 14 is provided on the inner side of the transfer tube 3 and is centrally distributed between the first diversion tubes 4. The conical platform 14 can guide the air flowing into the transfer tube 3 while making the air evenly distributed, ensuring that the air inside each first diversion tube 4 can be evenly transported, so that the mixture of gas and air inside each gas mixing tube 5 is relatively uniform.

[0021] Among them, a limit plate 15 is provided on one side of the spiral rod 13, which is symmetrically distributed and clamped on the inner side of the gas mixing tube 5. The limit plate 15 can limit and support the spiral rod 13 while ensuring a gap between the spiral rod 13 and the burner 10, which will not hinder the flow of gas and ensure that the mixed gas can be discharged through the burner 10. The spiral rod 13 can move to the right along its own axial direction, which is convenient for disassembly and assembly.

[0022] When the burner is working, the burner body 1 is started and the air intake pipe 9 is connected. The outside air is transported to the inside of the transfer pipe 3 through the exhaust pipe 2 by the drive of the burner body 1. The air inside the transfer pipe 3 is guided by the conical platform 14 and then transported to the inside of the first diversion pipe 4. At the same time, the gas inside the intake pipe 9 is diverted by the second diversion pipe 7 and then transported to the inside of the gas mixing pipe 5 through the connecting pipe 6. When the air inside the first diversion pipe 4 is transported to the inside of the gas mixing pipe 5, it will be mixed with the gas for the first time. The mixed gas is guided and decelerated by the spiral rod 13 and then mixed again. The mixed gas is discharged through the burner nozzle 10, and the ignition rod 12 is started to ignite the gas discharged from the burner nozzle 10. The ignited gas burns inside the combustion chamber 11. The content not described in detail in this description belongs to the existing technology known to professional and technical personnel in this field.

[0023] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the utility model disclosed in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of the utility model. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A low nitrogen burner, comprising a burner body (1) and an exhaust pipe (2) arranged outside the burner body (1), characterized in that: A transfer tube (3) is fixedly installed on one side of the exhaust pipe (2), and one side of the transfer tube (3) is connected to a first diverter tube (4). The outer side of one end of the first diverter tube (4) is connected to a gas mixing tube (5), and the outer side of one end of the gas mixing tube (5) is connected to a connecting tube (6). The inside of the connecting tube (6) is connected to an annular tube (8) located outside the gas mixing tube (5) through a second diverter tube (7). The bottom of the annular tube (8) is connected to an intake pipe (9). The outer side of one end of the gas mixing tube (5) away from the first diverter tube (4) is connected to a burner nozzle (10), and the outer side of the burner nozzle (10) is connected to a combustion chamber (11). An ignition rod (12) is provided inside the middle of the combustion chamber (11), and a spiral rod (13) is sleeved inside the gas mixing tube (5) and located between the first diverter tube (4) and the burner nozzle (10).

2. A low nitrogen burner according to claim 1, characterized in that: The first diverter tubes (4) are equidistantly distributed in an annular manner on one side of the transfer tube (3), and the outer side of each first diverter tube (4) is connected to a gas mixing tube (5), and one end of the first diverter tube (4) extending to the inside of the gas mixing tube (5) is away from the bottom end of the connecting tube (6).

3. A low nitrogen burner according to claim 1, characterized in that: A conical platform (14) is provided on the inner side of the transfer tube (3) and is centrally distributed between the first diversion tubes (4).

4. A low nitrogen burner according to claim 1, characterized in that: A limiting plate (15) is provided on one side of the spiral rod (13) and is symmetrically distributed and clamped on the inner side of the gas mixing tube (5).

Images