Hydrogen-doped premixing low-nitrogen burner

Abstract

The utility model provides a hydrogen-doped premixing low-nitrogen burner which comprises a premixing box, a plurality of mixing cavities are symmetrically formed in the inner circle center of the premixing box, a gas inlet layer is fixedly installed at the top of the premixing box, a gas inlet pipe is connected to the top of the gas inlet layer, a gas outlet layer is fixedly installed at the bottom of the premixing box, a gas outlet pipe is connected to the bottom of the gas outlet layer, and a gas outlet pipe is connected to the gas outlet layer. A delivery pipe is arranged at the bottom of the mixing cavity and communicated with the air outlet layer, a detection assembly is arranged in the mixing cavity and comprises a connecting rod, the connecting rod slidably penetrates out of the top of the mixing cavity, a limiting plate is arranged on the outer side of the air inlet layer, and a contact switch is arranged at the position, corresponding to the connecting rod, of the surface of the limiting plate. A plurality of mixing cavities are formed in the premixing box to mix fuel gas and mixed gas in batches, the mixing efficiency and uniformity can be improved, meanwhile, each mixing cavity can be independently controlled to be opened, the volume of the mixed gas can be quantified, the mixing cavities can also be uniformly opened and sent out, and use is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of premixed burner technology, specifically a hydrogen-doped premixed low-NOx burner. Background Technology

[0002] Hydrogen premixed combustion technology, as a method of combustion utilizing hydrogen energy, offers significant environmental advantages over traditional combustion equipment. Firstly, because the fuel and air are fully mixed before combustion, premixed burners ensure uniform fuel distribution and sufficient contact between the fuel gas and oxygen during combustion, thereby improving combustion efficiency, reducing temperature fluctuations, and minimizing the formation of localized high-temperature zones, which helps reduce the generation of harmful substances such as nitrogen oxides. Secondly, premixing technology improves combustion stability. The combustion characteristics of hydrogen-containing fuel gas differ from conventional fuel gas; it burns faster and has a higher flame propagation speed. Premixing allows for better control of the combustion speed and flame propagation speed, resulting in a more stable and reliable combustion process.

[0003] Patent CN218269047U proposes a fully premixed low-NOx burner. After the entire device is installed in the appropriate position, the output of the first motor drives the mixing shaft to rotate, which in turn drives the mixing plate to rotate. The mixing shaft then drives the stirring shaft to rotate, which rotates through the meshing of a stabilizing gear and a fixed gear, thereby driving the stirring fan blades to rotate. This further mixes the air and fuel gas inside the mixing chamber until the mixture is delivered to the burner body through a stabilizing pipe. Then, the output of the second motor drives the connecting gear to rotate, which in turn drives another connecting gear to rotate. This other connecting gear drives the rotating shaft to rotate, which in turn drives the sealing ball to rotate. The rotation of the ventilation holes regulates and controls the flow rate inside the stabilizing pipe, further improving the efficiency of the entire device.

[0004] In the above technical solution, the gas and the mixed gas are mixed in one chamber, so it is impossible to achieve the technical effect of quantitative gas mixing and the mixing efficiency is also generally low and not efficient enough. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a hydrogen-infused premixed low-NOx burner to solve the problems mentioned in the background. This invention features a novel structure, with multiple mixing chambers within the premixing box to mix the fuel gas and the mixed gas in batches, thereby accelerating the mixing efficiency and uniformity. Each mixing chamber can be individually controlled to open and quantitatively mix the gas volume, or it can be opened and discharged uniformly, making it more convenient to use.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hydrogen-doped premixed low-NOx burner, comprising a premixing chamber, wherein multiple mixing chambers are symmetrically arranged at the center of the premixing chamber; an air inlet layer is fixedly installed on the top of the premixing chamber, and an air inlet pipe is connected to the top of the air inlet layer; an air outlet layer is fixedly installed on the bottom of the premixing chamber, and an air outlet pipe is connected to the bottom of the air outlet layer; an outlet pipe is provided at the bottom of the mixing chamber, and the outlet pipe communicates with the air outlet layer; a detection component is provided inside the mixing chamber, the detection component including a connecting rod that slides through the top of the mixing chamber; a limiting plate is provided on the outside of the air inlet layer, and a contact switch is provided on the surface of the limiting plate corresponding to the position of the connecting rod; a driving component is installed inside both the air inlet layer and the air outlet layer, the driving component including a retaining ring that slides along the inner wall of the air inlet layer and the air outlet layer, and a vent is provided on the surface of the retaining ring.

[0007] Furthermore, a delivery pipe is installed in the air intake layer corresponding to the position of each mixing chamber. The delivery pipe extends into the bottom of the mixing chamber, and a gas mixing pipe is provided at the bottom of the delivery pipe. The gas mixing pipe extends into the interior of the mixing chamber, and a solenoid valve is installed inside the gas mixing pipe. The air inlet of the baffle ring corresponds to the outlet pipe and the delivery pipe, respectively.

[0008] Furthermore, a piston plate is slidably installed inside the mixing chamber, and a connecting rod is fixed to one side of the piston rod. A top cover is fixed to the top of the mixing chamber, and the connecting rod slides through the top cover. A first spring is fixed to the bottom of the top cover, and the other end of the first spring is fixedly connected to the piston plate.

[0009] Furthermore, the detection assembly also includes a contact plate, one end of the connecting rod extending out of the top cover is fixed to the contact plate, a second spring is fixed to the bottom of the contact plate, and the other end of the second spring is fixed to the top cover. A first electric push rod is fixed to the outer wall of the air intake layer, and the extended end of the first electric push rod is fixedly connected to the limiting plate.

[0010] Furthermore, the drive assembly also includes a geared disc, which is rotatably mounted on the bottom of the air outlet layer. A first gear is meshed with one side of the geared disc, and a shaft is fixed at the center of the first gear. The shaft rotates through the top of the premixing tank.

[0011] Furthermore, a motor is fixed to the top of the air intake layer, and a transmission belt is installed at the output end of the motor. The pulley at the other end of the transmission belt is fixedly connected to the top of the shaft.

[0012] Furthermore, a third gear is rotatably mounted at the bottom center of the air intake layer, and a second gear is meshed with one side of the third gear. The second gear is fixedly connected to the output end of the motor.

[0013] Furthermore, the top of the third gear and the gear disc are symmetrically fixed with second electric push rods, and the extended end of the second electric push rod is fixed with a connecting plate, which is fixedly connected to the retaining ring.

[0014] The beneficial effects of this utility model are:

[0015] In the single-chamber opening mode, this invention moves the retaining rings of the inlet and outlet layers to the positions of the delivery pipe and outlet pipe via a second electric push rod. It connects to only one mixing chamber through the vent. After the mixed gas in the mixing chamber is delivered, the motor drives the second and third gears to mesh, and the transmission belt drives the shaft to rotate the first gear to mesh with the gear plate. This allows the retaining rings inside the inlet and outlet layers to switch synchronously to deliver the next set of mixing chambers. In this mode, a quantitative amount of mixed gas can be delivered and mixed.

[0016] This invention uses a second electric push rod to lower the retaining ring, opening the connection ports of all the conveying and discharging pipes. This allows the mixing chamber to be opened simultaneously to mix the gas and send it out together. This mode is similar to the prior art, where the gas is mixed and discharged at the same time. Compared to mixing in one space, dividing the mixture into multiple small spaces can improve mixing efficiency and uniformity.

[0017] In this invention, when mixing a quantitative gas, the height of the limiting plate is controlled by the first electric push rod, which is the maximum moving height of the connecting rod. When gas is added into the mixing chamber, the piston plate is moved by the pressure, the connecting rod passes out from the top, the first spring is compressed, and the second spring is stretched until the contact plate contacts the contact switch. Thus, the electrical signal is transmitted to the drive component to switch the mixing chamber and realize the delivery and mixing of the quantitative gas.

[0018] Compared with the prior art, this utility model sets up multiple mixing chambers in the premixing box to mix the gas and the mixed gas in batches, which can speed up the mixing efficiency and uniformity. At the same time, each mixing chamber can be controlled to open and close individually, and the volume of mixed gas can be quantitatively measured. It can also be opened and discharged uniformly, making it more convenient to use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a hydrogen-doped premixed low-NOx burner according to the present invention;

[0020] Figure 2 This is a schematic diagram of the bottom structure of the premixing tank of a hydrogen-doped premixed low-NOx burner according to this utility model;

[0021] Figure 3 This is a schematic diagram of the top structure of the premixing tank of a hydrogen-doped premixed low-NOx burner according to this utility model;

[0022] Figure 4 This is a schematic diagram of the detection component structure of a hydrogen-doped premixed low-NOx burner according to the present invention;

[0023] Figure 5 This is a schematic diagram of the drive assembly structure of a hydrogen-doped premixed low-NOx burner according to the present invention.

[0024] In the diagram: 1. Premixing chamber; 11. Inlet layer; 12. Outlet layer; 13. Inlet pipe; 14. Outlet pipe; 15. Delivery pipe; 16. Mixing chamber; 17. Top cover; 18. First spring; 19. Piston plate; 2. Delivery pipe; 21. Mixing pipe; 3. Detection assembly; 31. Connecting rod; 32. Contact plate; 33. Second spring; 34. First electric push rod; 35. Limiting plate; 36. Contact switch; 4. Drive assembly; 41. Gear disc; 42. First gear; 43. Shaft; 44. Motor; 45. Retaining ring; 46. Transmission belt; 47. Second gear; 48. Third gear; 49. Second electric push rod; 410. Connecting plate; 411. Vent. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] Please see Figures 1 to 5 This utility model provides a technical solution: a hydrogen-doped premixed low-NOx burner, including a premixing box 1. Multiple mixing chambers 16 are symmetrically arranged at the center of the premixing box 1. An air inlet layer 11 is fixedly installed on the top of the premixing box 1, and an air inlet pipe 13 is connected to the top of the air inlet layer 11. An air outlet layer 12 is fixedly installed at the bottom of the premixing box 1, and an air outlet pipe 14 is connected to the bottom of the air outlet layer 12. An outlet pipe 15 is provided at the bottom of the mixing chambers 16 and communicates with the air outlet layer 12. A detection component 3 is provided inside the mixing chambers 16. The detection component 3 includes a connecting rod 31, which slides through the top of the mixing chambers 16. A limiting plate 35 is provided on the outer side of the air inlet layer 11, and the surface of the limiting plate 35 is aligned with... A contact switch 36 is provided at the position of the connecting rod 31. A drive assembly 4 is installed inside the air inlet layer 11 and the air outlet layer 12. The drive assembly 4 includes a retaining ring 45, which slides along the inner wall of the air inlet layer 11 and the air outlet layer 12. A vent 411 is opened on the surface of the retaining ring 45. When using the device, the air inlet pipe 13 is connected to the gas pipeline and the air outlet pipe 14 is connected to the burner. When a quantitative gas mixture and gas discharge are required, gas is individually fed into the mixing chamber 16 and mixed. The mixing chamber 16 is switched by the drive assembly 4. Each mixing chamber 16 does not interfere with the others. When a large amount of mixed gas is required, all mixing chambers 16 are opened simultaneously and the uniformly mixed gas is sent into the combustion chamber at the same time.

[0027] In this embodiment, a delivery pipe 2 is installed in the air intake layer 11 corresponding to the position of each mixing chamber 16. The delivery pipe 2 passes through the bottom of the mixing chamber 16. A mixing pipe 21 is provided at the bottom of the delivery pipe 2 and passes through the interior of the mixing chamber 16. A solenoid valve is installed inside the mixing pipe 21. The vent 411 of the baffle ring 45 corresponds to the outlet pipe 15 and the delivery pipe 2 respectively. The delivery pipe 2 is used to deliver the fuel gas of the air intake layer 11, and the mixing pipe 21 is used to deliver air and hydrogen to mix the gas inside the mixing chamber 16.

[0028] In this embodiment, a piston plate 19 is slidably installed inside the mixing chamber 16, and a connecting rod 31 is fixed to one side of the piston rod. A top cover 17 is fixed to the top of the mixing chamber 16, and the connecting rod 31 slides through the top cover 17. A first spring 18 is fixed to the bottom of the top cover 17, and the other end of the first spring 18 is fixedly connected to the piston plate 19. The detection assembly 3 also includes a contact plate 32. One end of the connecting rod 31 that extends through the top cover 17 is fixed to the contact plate 32. A second spring 33 is fixed to the bottom of the contact plate 32, and the other end of the second spring 33 is fixed to the top cover 17. The air intake layer... A first electric push rod 34 is fixed on the outer wall of 11, and the extended end of the first electric push rod 34 is fixedly connected to the limiting plate 35. When mixing a quantitative gas, the height of the limiting plate 35, i.e. the maximum moving height of the connecting rod 31, is controlled by the first electric push rod 34. When gas is added into the mixing chamber 16, the piston plate 19 is moved by the pressure, the connecting rod 31 passes out from the top, the first spring 18 is compressed, and the second spring 33 is stretched until the contact plate 32 contacts the contact switch 36, so that the electrical signal is transmitted to the drive assembly 4 to switch the mixing chamber 16 to realize the delivery and mixing of a quantitative gas.

[0029] In this embodiment, the drive assembly 4 further includes a gear disk 41. The gear disk 41 is rotatably mounted on the bottom of the air outlet layer 12. A first gear 42 is meshed with one side of the gear disk 41. A shaft 43 is fixed at the center of the first gear 42. The shaft 43 rotatably extends out of the top of the premixing box 1. A motor 44 is fixed at the top of the air inlet layer 11, and a transmission belt 46 is installed at the output end of the motor 44. The pulley at the other end of the transmission belt 46 is fixedly connected to the top of the shaft 43. A third gear 48 is rotatably mounted at the center of the bottom of the air inlet layer 11. A second gear 47 is meshed with one side of the third gear 48. The second gear 47 is fixedly connected to the output end of the motor 44. A second electric push rod 49 is symmetrically fixed to the top of both the third gear 48 and the gear disk 41. A connecting plate 410 is fixed to the extended end of the second electric push rod 49. The connecting plate 410 is fixedly connected to the retaining ring 45. In the single-chamber opening mode, the air inlet... The retaining rings 45 of the gas layer 11 and the gas outlet layer 12 are moved to the positions of the conveying pipe 2 and the delivery pipe 15 by the second electric push rod 49. They are connected to only one mixing chamber 16 through the air inlet 411. After the mixed gas in the mixing chamber 16 is delivered, the second gear 47 and the third gear 48 are driven by the motor 44, and the transmission belt 46 drives the shaft 43 to drive the first gear 42 to rotate and mesh with the gear plate 41. This allows the retaining rings 45 inside the gas inlet layer 11 and the gas outlet layer 12 to switch synchronously to deliver the next set of mixing chambers 16. In this mode, a quantitative amount of mixed gas can be delivered and mixed. The retaining rings 45 are lowered by the second electric push rod 49 to open the connection ports of all the conveying pipes 2 and the delivery pipes 15. The mixing chambers 16 can be opened at the same time to mix the gas and deliver it together. In this mode, similar to the existing technology, the gas is mixed and delivered at the same time. Compared with mixing in one space, dividing it into multiple small spaces can improve the mixing efficiency and uniformity.

[0030] When using the device, the inlet pipe 13 is connected to the gas pipeline, and the outlet pipe 14 is connected to the burner. When a quantitative mixture of gas is required and gas is discharged, gas is individually introduced into each mixing chamber 16 for mixing. Switching is achieved through the drive assembly 4. Each mixing chamber 16 does not interfere with the others. When a large amount of mixed gas is required, all mixing chambers 16 are opened simultaneously, and uniformly mixed gas is simultaneously sent into the combustion chamber. In single-chamber opening mode, the retaining rings 45 of the inlet layer 11 and the outlet layer 12 are moved to the positions of the delivery pipe 2 and the outlet pipe 15 via the second electric push rod 49. The gas is connected to only one mixing chamber 16 through the vent 411. After the mixed gas in the mixing chamber 16 is sent out, the second gear 47 and the third gear 48 are meshed by the motor 44, and the transmission belt 46 drives the shaft 43 to rotate the first gear 42 and mesh with the gear plate 41, so that the retaining rings 45 inside the inlet layer 11 and the outlet layer 12 are switched synchronously. The next mixing chamber 16 is then used for dispensing. In this mode, a quantitative amount of mixed gas can be dispensed and mixed. The second electric push rod 49 lowers the retaining ring 45, opening the connection ports of all the delivery pipes 2 and the outlet pipes 15. The mixing chamber 16 can be opened simultaneously to mix the gas and dispense it together. This mode is similar to the existing technology, where the gas is mixed and dispensed at the same time. Compared to mixing in one space, dividing the gas into multiple small spaces can improve the mixing efficiency and uniformity. When mixing a quantitative amount of gas, the height of the limiting plate 35, i.e., the maximum moving height of the connecting rod 31, is controlled by the first electric push rod 34. When gas is added into the mixing chamber 16, the piston plate 19 is moved by the pressure, and the connecting rod 31 passes out from the top. The first spring 18 is compressed and the second spring 33 is stretched until the contact plate 32 contacts the contact switch 36. The electrical signal is then transmitted to the drive assembly 4 to switch the mixing chamber 16 and realize the quantitative dispensing and mixing of gas.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hydrogen-doped premixed low-NOx burner, comprising a premixing chamber (1), characterized in that: The premixing box (1) has multiple mixing chambers (16) symmetrically arranged at its center. An air inlet layer (11) is fixedly installed on the top of the premixing box (1), and an air inlet pipe (13) is connected to the top of the air inlet layer (11). An air outlet layer (12) is fixedly installed at the bottom of the premixing box (1), and an air outlet pipe (14) is connected to the bottom of the air outlet layer (12). An outlet pipe (15) is provided at the bottom of the mixing chamber (16), and the outlet pipe (15) communicates with the air outlet layer (12). A detection component (3) is provided inside the mixing chamber (16). The system includes a connecting rod (31) that slides through the top of the mixing chamber (16). A limiting plate (35) is provided on the outer side of the air intake layer (11), and a contact switch (36) is provided on the surface of the limiting plate (35) at the position corresponding to the connecting rod (31). A drive assembly (4) is installed inside both the air intake layer (11) and the air outlet layer (12). The drive assembly (4) includes a retaining ring (45) that slides along the inner wall of the air intake layer (11) and the air outlet layer (12), and a vent (411) is opened on the surface of the retaining ring (45).

2. The hydrogen-doped premixed low-NOx burner according to claim 1, characterized in that: The air intake layer (11) is equipped with a delivery pipe (2) corresponding to the position of each mixing chamber (16). The delivery pipe (2) is inserted into the bottom of the mixing chamber (16). A mixing pipe (21) is provided at the bottom of the delivery pipe (2), and the mixing pipe (21) is inserted into the interior of the mixing chamber (16). A solenoid valve is installed inside the mixing pipe (21). The air inlet (411) of the retaining ring (45) corresponds to the delivery pipe (15) and the delivery pipe (2) respectively.

3. A hydrogen-doped premixed low-NOx burner according to claim 2, characterized in that: A piston plate (19) is slidably installed inside the mixing chamber (16), and a connecting rod (31) is fixed to one side of the piston rod. A top cover (17) is fixed to the top of the mixing chamber (16), and the connecting rod (31) slides through the top cover (17). A first spring (18) is fixed to the bottom of the top cover (17), and the other end of the first spring (18) is fixedly connected to the piston plate (19).

4. A hydrogen-doped premixed low-NOx burner according to claim 3, characterized in that: The detection component (3) also includes a contact plate (32). One end of the connecting rod (31) that protrudes from the top cover (17) is fixed with the contact plate (32). A second spring (33) is fixed at the bottom of the contact plate (32), and the other end of the second spring (33) is fixed on the top cover (17). A first electric push rod (34) is fixed on the outer wall of the air intake layer (11), and the extended end of the first electric push rod (34) is fixedly connected to the limiting plate (35).

5. A hydrogen-doped premixed low-NOx burner according to claim 1, characterized in that: The drive assembly (4) also includes a gear disk (41), which is rotatably mounted on the bottom of the air outlet layer (12). A first gear (42) is meshed on one side of the gear disk (41), and a shaft (43) is fixed at the center of the first gear (42). The shaft (43) rotates through the top of the premix box (1).

6. A hydrogen-doped premixed low-NOx burner according to claim 5, characterized in that: A motor (44) is fixed to the top of the air intake layer (11), and a transmission belt (46) is installed at the output end of the motor (44). The pulley at the other end of the transmission belt (46) is fixedly connected to the top of the shaft (43).

7. A hydrogen-doped premixed low-NOx burner according to claim 6, characterized in that: A third gear (48) is rotatably installed at the bottom center of the air intake layer (11). A second gear (47) is meshed with one side of the third gear (48). The second gear (47) is fixedly connected to the output end of the motor (44).

8. A hydrogen-doped premixed low-NOx burner according to claim 7, characterized in that: The top of the third gear (48) and the gear plate (41) are symmetrically fixed with a second electric push rod (49), and the extended end of the second electric push rod (49) is fixed with a connecting plate (410), which is fixedly connected to the retaining ring (45).

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