Low-nitrogen combustor
Through the combined structure of the inner pipe body, the outer pipe body, the feed pipe and the screw rod, the problem of insufficient combustion of the burner is solved, uniform dispersed fuel combustion is achieved, nitrogen oxide generation and energy consumption are reduced, and maintenance convenience is optimized.
Patent Information
- Application Number
- CN202422019986.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-20
AI Technical Summary
The existing burners are not burned sufficiently, and the flame is columnar, which is prone to local high temperatures, resulting in the formation of nitrogen oxides, especially in the case of small inner tube diameters, the nitrogen oxide value is higher.
The combination structure of inner pipe body, outer pipe body, feeding pipe and spiral rod is adopted. After the fuel enters the inner pipe body through the feeding pipe, it rotates and diverts under the action of the spiral groove, and collides and diffuses at the outlet of the outer pipe body. Combined with the removable connection design of the upper and lower chucks, it realizes uniform dispersed combustion of fuel.
It improves the combustion efficiency of the burner, reduces local high temperature, reduces the generation of nitrogen oxides, reduces energy consumption, and the structural design is convenient for disassembly and maintenance, and reduces maintenance costs.
Smart Images
Figure CN223076913U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a low-nitrogen burner, belonging to the technical field of burners. Background Art
[0002] During the roasting process of an open roasting furnace, a combustion device equipped with a burner is required to spray fuel into the roasting furnace through the burner to make it burn fully, so that the products in the furnace can meet the process production requirements and reach the physical and chemical indexes before they can be sold. During the operation of the burner, there are assessments of energy consumption and environmental protection indicators. For different burners, the effects of energy consumption and environmental protection values are different. Among them, the obvious one is nitrogen oxides.
[0003] Generation of nitrogen oxides: During the combustion process, when organic substances (coal, natural gas) burn under high-temperature conditions, nitrogen and oxygen in the air will react to form nitrogen oxides. The main reaction is that nitrogen and oxygen form nitric oxide, and then nitric oxide further reacts with oxygen in the air to form nitrogen dioxide.
[0004] Traditional burners use straight inner tubes, including burners with inner tube diameters of 12mm, 8mm, 6mm, and 5.5mm. The applicant found in the actual production process that the existing burners have at least the following problems: The burners do not burn sufficiently, the flame is columnar, and it is extremely easy to generate local high temperatures, which leads to the generation of nitrogen oxides. The smaller the inner tube diameter, the more serious the local high temperature situation and the higher the nitrogen oxide value. Content of the Utility Model
[0005] Based on the above, the utility model provides a low-nitrogen burner to overcome the deficiencies of the prior art.
[0006] The technical solution of the utility model is: A low-nitrogen burner, including an inner tube body, an outer tube body, a feeding pipe, and a spiral rod; wherein,
[0007] The outer tube body is sleeved outside the inner tube body, and the outlet end of the outer tube body extends beyond the outlet end of the inner tube body by a predetermined distance; the feeding pipe is arranged at the inlet end of the outer tube body, and the feeding pipe is communicated with the inlet end of the inner tube body; the spiral rod is installed at the outlet end of the inner tube body, and spiral grooves are arranged on the surface of the spiral rod along its length direction;
[0008] In the feeding state, the fuel entering the inner tube body from the feeding pipe is spirally guided by the spiral grooves during the process of passing through the spiral rod, and collides with the outlet end of the outer tube body after being thrown out.
[0009] In one example, it further includes a connection component, and the connection component includes:
[0010] Upper chuck, the upper chuck has a connection port, the connection port includes an upper connection port and a lower connection port respectively arranged at the upper and bottom parts of the upper chuck, the upper connection port is threadedly connected to the bottom end of the material receiving pipe, and the lower connection port is threadedly connected to the top end of the inner pipe body;
[0011] Lower chuck, the lower chuck has a mating port, the top end of the outer pipe body is annularly protruded and hooked at the mating port, and after the lower chuck and the upper chuck are engaged, they are bolted together.
[0012] In one example, a sealing ring is placed inside the mating port, and the top and bottom surfaces of the sealing ring are in close contact with the bottom surface of the upper chuck and the top surface of the outer pipe body respectively.
[0013] In one example, a flow dividing plate is fixedly connected to the inner wall of the connection port, a convex block is provided in the middle of the end of the flow dividing plate facing the material receiving pipe, and a plurality of flow dividing ports are opened around the convex block on the flow dividing plate.
[0014] In one example, a connecting shaft is rotatably connected to the top of the screw rod, and the connecting shaft is fixedly connected to the bottom surface of the flow dividing plate.
[0015] In one example, the material of the outer pipe body is silicon carbide.
[0016] Compared with the prior art, the utility model has the following beneficial effects:
[0017] 1. A burner is formed by combining an inner pipe body, an outer pipe body, a material receiving pipe and a screw rod. After the fuel is connected through the material receiving pipe, the fuel will enter the inner pipe body through the material receiving pipe, and then during the process of passing through the screw rod, under the rotational flow dividing action of the spiral groove, the fuel is divided towards the outlet edge of the outer pipe body. After the fuel is spirally ejected from the outlet of the inner pipe body, it will collide with the inner wall of the outer pipe body, which is beneficial to scatter the fuel, make the burner burn more fully, the ejected flame is in a dispersed shape, reduce the local high temperature situation, thereby reducing energy consumption and reducing the nitrogen oxide value;
[0018] 2. Through the clamping of the upper chuck and the lower chuck and the fixing method by bolts, the detachability of the upper chuck and the lower chuck is realized, and the connection between the upper connection port and the bottom end of the material receiving pipe and the connection between the lower connection port and the top end of the inner pipe body are both threaded connections, and the inner pipe body is also convenient to disassemble. The outer pipe body is clamped and positioned through the upper chuck and the lower chuck. When the upper chuck and the lower chuck are disassembled, the outer pipe body is automatically disassembled. The structure is optimized, it can be disassembled and assembled in stages, it is convenient to replace, and it can be disassembled and maintained in stages, which is beneficial to avoid replacing the whole set, and thus is beneficial to reducing the maintenance cost. Description of the Drawings
[0019] Figure 1The front view of the overall structure of the present utility model;
[0020] Figure 2 The top view of the overall structure of the present utility model;
[0021] Figure 3 The structural sectional view of the front view of the overall structure of the present utility model;
[0022] Figure 4 is Figure 3 The enlarged view of part A in
[0023] Figure 5 is Figure 3 The enlarged view of part B in
[0024] Figure 6 The structural sectional view of the front view of the flow distribution plate of the present utility model;
[0025] Figure 7 The top view of the flow distribution plate of the present utility model;
[0026] In the figure: inner tube body 1, outer tube body 2, material receiving tube 3, screw rod 4, upper chuck 5, connecting port 6, upper connection port 7, lower connection port 8, lower chuck 9, overlapping joint 10, bolt 11, sealing ring 12, flow distribution plate 13, flow distribution port 14, connecting shaft 15. Detailed implementation manners
[0027] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific implementation manners of the present utility model will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific implementations disclosed below.
[0028] Please refer to Figures 1 to 4 , in this embodiment, a low-nitrogen burner includes an inner tube body 1, an outer tube body 2, a material receiving tube 3 and a screw rod 4. The outer tube body 2 is sleeved outside the inner tube body 1, and the outlet end of the outer tube body 2 extends beyond the outlet end of the inner tube body 1 by a certain distance. The material receiving tube 3 is installed at the inlet end of the outer tube body 2 and is communicated with the inlet end of the inner tube body 1 to introduce fuel into the inner tube body 1. The screw rod 4 is installed at the outlet end of the inner tube body 1, and a plurality of spiral grooves are provided on the surface of the screw rod 4 along its length direction. These spiral grooves communicate the outlet end of the inner tube body 1 with the outlet end of the outer tube body 2. The spiral grooves are spiral trajectories. After the fuel is ejected through the spiral grooves, it will generate a swirl and form a dispersed flow, and will collide with the inner wall of the outer tube, resulting in further diffusion.
[0029] During use, after the fuel is connected through the material receiving pipe 3, the fuel will enter the inner pipe body 1 through the material receiving pipe 3. Then, during the process of passing through the spiral rod 4, under the diversion effect of the spiral groove, the fuel is diverted towards the outlet edge of the outer pipe body 2. After the fuel is spirally ejected from the outlet of the inner pipe body 1, it will collide with the inner wall of the outer pipe body 2, which is beneficial to scatter the fuel, making the burner burn more fully. The ejected flame is in a dispersed form, which can reduce the local high-temperature situation, thereby reducing energy consumption and the nitrogen oxide value.
[0030] In one example, the burner further includes a connection assembly. The connection assembly includes an upper chuck 5 and a lower chuck 9. The upper chuck 5 has a connection through-hole 6. The connection through-hole 6 includes an upper connection port 7 and a lower connection port 8 respectively connected to the upper and bottom parts of the upper chuck 5. The upper connection port 7 is threadedly connected to the bottom end of the material receiving pipe 3, and the lower connection port 8 is threadedly connected to the top end of the inner pipe body 1; the lower chuck 9 has a docking port 10. The top end of the outer pipe body 2 is annularly protruded and hung at the docking port 10. After the lower chuck 9 and the upper chuck 5 are engaged, they are connected by multiple bolts 11.
[0031] Through the clamping of the upper chuck 5 and the lower chuck 9 and the fixing method by bolts 11, the detachable of the upper chuck 5 and the lower chuck 9 is realized. Moreover, the connection between the upper connection port 7 and the bottom end of the material receiving pipe 3 and the threaded connection between the lower connection port 8 and the top end of the inner pipe body 1 are both threaded connections, and the inner pipe body 1 is also convenient to disassemble. The outer pipe body 2 is clamped and positioned through the upper chuck 5 and the lower chuck 9. When the upper chuck 5 and the lower chuck 9 are disassembled, the outer pipe body 2 is automatically disassembled, realizing the structural optimization and the function of hierarchical disassembly and assembly, which is convenient for replacement and can be disassembled and maintained in stages, conducive to avoiding full set replacement, and thus conducive to reducing the maintenance cost.
[0032] In one example, a sealing ring 12 is placed inside the docking port 10. The top and bottom surfaces of the sealing ring 12 are in close contact with the bottom surface of the upper chuck 5 and the top surface of the outer pipe body 2 respectively.
[0033] By setting the sealing ring 12, it plays a role in sealing the gap between the upper chuck 5 and the lower chuck 9, which is beneficial to prevent fuel leakage.
[0034] In one example, a diversion plate 13 is fixedly connected to the inner wall of the connection through-hole 6. A convex block is provided in the middle of the end of the diversion plate 13 facing the material receiving pipe 3, and a plurality of diversion openings 14 are formed around the convex block on the diversion plate 13. These diversion openings 14 connect the two ends of the connection through-hole 6.
[0035] By setting the diversion plate 13, the fuel entering from the material receiving pipe 3 first impacts on the diversion plate 13 before entering the inner pipe body 1 and enters the inner pipe body 1 through these diversion openings 14, thereby realizing the dispersion of the fuel.
[0036] In one example, a connecting shaft 15 is rotatably connected to the top of the screw rod 4, and the connecting shaft 15 is fixedly connected to the bottom surface of the diverter plate 13.
[0037] By providing the connecting shaft 15, the screw rod 4 is supported. Through the rotational connection between the screw rod 4 and the connecting shaft 15, when the fuel passes through the screw rod 4, under the frictional action between the fuel and the wall of the spiral groove, the fuel pushes the screw rod 4 to rotate, making the fuel spray out more evenly, which is beneficial to evenly diffuse the fuel.
[0038] In one example, the outer pipe body 2 is made of silicon carbide. The outer pipe body 2 made of silicon carbide is more heat-resistant and can well protect the inner pipe body 1. Compared with traditional burners, the low-nitrogen burner can be inserted deeper during use.
[0039] The working principle of the above low-nitrogen burner is as follows:
[0040] After the fuel is connected through the receiving pipe 3, the fuel will enter the inner pipe body 1 through the receiving pipe 3. Then, during the process of passing through the screw rod 4, under the rotational diversion effect of the spiral groove, the fuel is diverted to the outlet edge of the outer pipe body 2. After the fuel is spirally ejected from the outlet of the inner pipe body 1, it will collide with the inner wall of the outer pipe body 2, which is beneficial to disperse the fuel, making the burner burn more fully, the ejected flame is in a dispersed shape, reducing the local high-temperature situation, thereby reducing energy consumption and the nitrogen oxide value;
[0041] In addition, through the clamping of the upper chuck 5 and the lower chuck 9, and the fixing method by bolts 11, the detachable of the upper chuck 5 and the lower chuck 9 is realized. And the connection between the upper connection port 7 and the bottom end of the receiving pipe 3 and the connection between the lower connection port 8 and the top end of the inner pipe body 1 are both threaded connections. The inner pipe body 1 is also convenient to disassemble. The outer pipe body 2 is clamped and positioned through the upper chuck 5 and the lower chuck 9. When the upper chuck 5 and the lower chuck 9 are disassembled, the outer pipe body 2 is automatically disassembled. The structure is optimized, it can be disassembled and assembled in stages, the replacement is convenient, and it can be disassembled and maintained in stages, which is beneficial to avoid replacing the whole set, and thus beneficial to reducing the maintenance cost.
[0042] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.
Claims
1. A low-nitrogen burner, characterized in that, It includes an inner tube body (1), an outer tube body (2), a material receiving tube (3) and a screw rod (4); wherein, The outer tube body (2) is sleeved outside the inner tube body (1), and the outlet end of the outer tube body (2) extends beyond the outlet end of the inner tube body (1) by a predetermined distance; the material receiving tube (3) is arranged at the inlet end of the outer tube body (2), and the material receiving tube (3) is communicated with the inlet end of the inner tube body (1); the screw rod (4) is installed at the outlet end of the inner tube body (1), and spiral grooves are arranged on the surface of the screw rod (4) along its length direction.
2. The low-nitrogen burner according to claim 1, wherein It further includes a connection assembly, and the connection assembly includes: An upper chuck (5), the upper chuck (5) has a connection through-hole (6), the connection through-hole (6) includes an upper connection port (7) and a lower connection port (8) respectively arranged on the upper and bottom parts of the upper chuck (5), the upper connection port (7) is threadedly connected to the bottom end of the material receiving tube (3), and the lower connection port (8) is threadedly connected to the top end of the inner tube body (1); A lower chuck (9), the lower chuck (9) has a butting port (10), the top end of the outer tube body (2) is annularly protruded and hung at the butting port (10), and after the lower chuck (9) and the upper chuck (5) are engaged, they are connected by bolts (11).
3. The low-nitrogen burner according to claim 2, characterized in that, A sealing ring (12) is placed inside the butting port (10), and the top surface and the bottom surface of the sealing ring (12) are in close contact with the bottom surface of the upper chuck (5) and the top surface of the outer tube body (2) respectively.
4. The low-nitrogen burner according to claim 2, characterized in that, A flow dividing plate (13) is fixedly connected to the inner wall of the connection through-hole (6), a convex block is arranged in the middle of the end of the flow dividing plate (13) facing the material receiving tube (3), and a plurality of flow dividing ports (14) are arranged on the flow dividing plate (13) around the convex block.
5. The low-nitrogen burner according to claim 4, characterized in that, The top of the screw rod (4) is rotatably connected with a connecting shaft (15), and the connecting shaft (15) is fixedly connected to the bottom surface of the flow dividing plate (13).
6. The low-nitrogen burner according to claim 1, wherein The material of the outer tube body (2) is silicon carbide.