System for realizing energy saving and emission reduction of industrial kiln by oxygen enrichment combustion

Abstract

The present application relates to the field of energy saving and emission reduction, and discloses a system for realizing energy saving and emission reduction of industrial kiln by oxygen enrichment combustion, comprising an industrial kiln. The present application drives the air inlet pipe, the discharge cover and the nozzle to rotate through the driving assembly, and at the same time, the fixed reversing groove and the sliding block are matched to drive the nozzle to realize synchronous switching of the radial and axial positions. Combined with the rotary motion of the nozzle, the present application realizes comprehensive coverage of the axial and radial directions inside the industrial kiln, ensures uniform combustion in each area of the kiln, and improves the overall combustion effect and the working efficiency of the kiln. In addition, the present application can also control the spraying state of the nozzle during the adjustment process. When the nozzle is at the radial position, the inner diameter of the spraying channel is increased to improve the oxygen injection amount and the oxygen concentration, meet the oxygen demand of the combustion center, and ensure sufficient fuel combustion. When the nozzle is at the axial position, the size of the spraying channel is reduced to prolong the oxygen injection distance, ensure that the far distance area of the kiln can also obtain sufficient oxygen, and avoid the situation of insufficient local fuel combustion.

Description

Technical Field

[0001] This invention belongs to the field of energy conservation and emission reduction. Specifically, it relates to a system for achieving oxygen-enriched combustion and energy conservation and emission reduction in industrial kilns. Background Technology

[0002] In the industrial production sector, industrial kilns are one of the core production equipment, widely used in industries such as metallurgy, building materials, and chemicals. Their operation consumes large amounts of fuel and emits significant amounts of waste gas. Energy conservation and emission reduction have become core requirements for the technological upgrading of industrial kilns. Oxygen-enriched combustion technology, as an effective means of energy conservation and emission reduction, improves fuel combustion efficiency and reduces fuel consumption and waste gas emissions by injecting oxygen-enriched gas into the kiln. It has been widely applied in the retrofitting of industrial kilns.

[0003] The oxygen demand in the radial and axial directions inside an industrial kiln differs significantly. The radial region is closer to the combustion center of the kiln, where fuel combustion is intense and the demand for oxygen content and concentration is higher. The axial region is farther from the combustion center, where fuel combustion intensity is lower, but a longer injection distance is required to ensure that oxygen enrichment can reach the kiln. Therefore, the requirements for oxygen injection conditions are completely different from those in the radial region.

[0004] Currently, most existing industrial kilns use fixed nozzles to inject oxygen, which can easily lead to insufficient oxygen in certain areas and uneven combustion within the kiln. Although some equipment uses different oxygen channels to deliver oxygen radially and axially, all oxygen channels in such systems ultimately need to be connected to the same oxygen input system. To achieve differentiated oxygen content supply to different channels, an additional separate electronic content adjustment system must be added. This not only increases the complexity of the equipment structure and manufacturing cost, but also makes it prone to electrical failures and insufficient precision in oxygen content adjustment for each channel.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns includes an industrial kiln, on which an air inlet pipe is rotatably mounted, and a cover plate is installed at the end of the air inlet pipe.

[0007] An exhaust hood is rotatably installed on the air inlet pipe inside the industrial kiln. A pair of nozzles are installed on the exhaust hood, and the two nozzles correspond to the axial and radial positions of the industrial kiln, respectively. When the air inlet pipe rotates, it synchronously drives the nozzles to rotate. The exhaust hood is equipped with a rocker arm, and a slider is slidably mounted on the rocker arm. The slider and the cover plate have a reversing groove, which is elliptical. When the air intake pipe rotates, the slider is driven to slide synchronously through the reversing groove, which in turn drives the position of the exhaust hood and the nozzle to change through the rocker arm. The radial and axial positions of the two nozzles are switched synchronously. An adjusting plug is inserted into the nozzle, and the outer wall of the adjusting plug is provided with a conical surface. A guide frame is installed on the adjusting plug. A positioning plate is installed on the air inlet pipe, and a guide groove is opened on the positioning plate that slides against the guide frame. The guide groove corresponding to the radial position is concave inward to guide the adjusting plug away from the nozzle and increase the amount of rich oxygen sprayed from the nozzle in the radial position.

[0008] In a preferred embodiment of the present invention, an installation plate is bolted to the side wall of the industrial kiln, a guide plate is rotatably mounted on the installation plate, the guide plate is connected to the side wall of the air inlet pipe, and a drive assembly is also installed at the end of the installation plate. The drive assembly is used to drive the air inlet pipe to rotate synchronously, thereby driving the nozzle to rotate.

[0009] In a preferred embodiment of the present invention, a timing frame is mounted on the mounting plate. The timing frame is arched and its center is connected to the side wall of the cover plate. An input pipe is mounted on the cover plate and is connected to the air inlet pipe. A connecting flange is mounted at the end of the input pipe, which is used to connect the input pipe to the enrichment delivery system.

[0010] In a preferred embodiment of the present invention, a connecting seat is installed on the air intake pipe, a positioning shaft is installed through the connecting seat, the positioning shaft is connected to the positioning plate, and the positioning shaft is rotatably connected to the outer wall of the exhaust hood.

[0011] In a preferred embodiment of the present invention, the exhaust hood has a two-half structure, and a positioning ring is rotatably installed between the two halves. A high-temperature resistant sealing plug is provided on the outer wall of the positioning ring, and the high-temperature resistant sealing plug is used to seal the connection position. A bracket is installed on the outer wall of the positioning ring, and the bracket is L-shaped. The side wall of the bracket is installed on the side wall of the air intake pipe. A notch is opened at the center of the positioning ring, and the notch is interconnected with the exhaust hood and the air intake pipe.

[0012] In a preferred embodiment of the present invention, a strip groove is provided on the rocker arm, and a light rod is slidably installed on the strip groove. The diameter of the light rod and the width of the strip groove are adapted to each other. A connecting frame is installed at the end of the light rod, and a slider is installed at the end of the connecting frame. A protrusion is installed on the slider, and the end of the protrusion is slidably connected to the surface of the reversing groove.

[0013] In a preferred embodiment of the present invention, a positioning rod is installed through the slider. The two ends of the positioning rod are installed at the ends of the air inlet pipe. The ends of the air inlet pipe are circular and are adapted to the shape of the cover plate. The positioning rod is used to limit the movement direction of the slider.

[0014] In a preferred embodiment of the present invention, a connecting cover is installed on the top of the discharge hood, a nozzle is installed on the side wall of the connecting cover, and a plug is installed on the inner side wall of the connecting cover. The axis of the plug and the axis of the nozzle are both on the same straight line. The end of the plug is movably inserted into the end of the adjusting plug, and the plug is used to limit the sliding of the adjusting plug along the axis of the nozzle.

[0015] In a preferred embodiment of the present invention, a guide seat is movably inserted into the outer wall of the guide frame, and the guide seat is installed on the side wall of the discharge hood. The guide seat is used to guide the guide frame to rotate synchronously with the nozzle.

[0016] In a preferred embodiment of the present invention, a slide rod is installed at one end of the guide frame, the slide rod is slidably disposed on the guide groove, and a collar is installed at the other end of the guide frame. A fixing sleeve is installed inside the collar, the fixing sleeve is installed on the side wall of the adjusting plug, and the insert rod moves through the fixing sleeve.

[0017] Compared with the prior art, the present invention has the following advantages: This invention drives the intake pipe, exhaust hood, and nozzle to rotate via a drive assembly. Simultaneously, the fixed reversing groove of the cover plate, in conjunction with the slider, enables the nozzle to synchronously switch between radial and axial positions. Combined with the nozzle's rotational movement, this achieves comprehensive axial and radial coverage within the industrial kiln, ensuring uniform combustion in all areas and improving overall combustion efficiency and kiln operating efficiency. Furthermore, the invention allows for control of the nozzle's spray pattern during adjustment. In the radial position, the inner diameter of the spray channel increases, enhancing the oxygen-enriched spray volume and concentration to meet the oxygen demand of the combustion center and ensure complete fuel combustion. In the axial position, the spray channel size decreases, extending the oxygen-enriched spray distance to ensure sufficient oxygen even in distant axial areas of the kiln, preventing incomplete combustion in certain areas and thus reducing fuel consumption and exhaust emissions.

[0018] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0019] In the attached diagram: Figure 1 A three-dimensional diagram of a system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns; Figure 2 This is a partial system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns. Figure 1 ; Figure 3 This is a partial system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns. Figure 2 ; Figure 4 This is a structural diagram of the cover plate after disassembly of a system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns. Figure 5 A system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns. Figure 4 Enlarged view of point A in the middle; Figure 6 This is a structural diagram of the end cover plate of a system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns. Figure 7 A cross-sectional view of the air inlet pipe of a system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns. Figure 1 ; Figure 8 A cross-sectional view of the air inlet pipe of a system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns. Figure 2 ; Figure 9 This is a structural diagram of the end of an exhaust hood for a system that achieves oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns. Figure 10 A system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns. Figure 9 Enlarged view of section B in the middle.

[0020] In the diagram: 1. Industrial kiln; 2. Inlet pipe; 3. Cover plate; 4. Input pipe; 5. Connecting flange; 6. Synchronizing frame; 7. Mounting plate; 8. Drive assembly; 9. Guide plate; 10. Positioning ring; 11. Notch; 12. Bracket; 13. Discharge hood; 14. Positioning shaft; 15. Nozzle; 16. Adjusting plug; 17. Insert rod; 18. Collar; 19. Guide frame; 20. Guide seat; 21. Slide rod; 22. Positioning plate; 23. Guide groove; 24. Rocker arm; 25. Strip groove; 26. Smooth rod; 27. Connecting frame; 28. Slider; 29. ​​Positioning rod; 30. Protrusion; 31. Reversing groove; 32. Conical surface; 33. Connecting cover; 34. Fixing sleeve; 35. Connecting seat. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0022] Example 1: like Figures 1 to 10 As shown, a system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns includes an industrial kiln 1, an air inlet pipe 2 rotatably mounted on the industrial kiln 1, and a cover plate 3 in a fixed state rotatably mounted at the end of the air inlet pipe 2.

[0023] An exhaust hood 13 is rotatably mounted on the air inlet pipe 2 located inside the industrial kiln 1. A pair of nozzles 15 are respectively mounted on the exhaust hood 13, and the two nozzles 15 correspond to the axial and radial positions of the industrial kiln 1, respectively. When the air inlet pipe 2 rotates, it synchronously drives the nozzles 15 to rotate. By driving the exhaust hood 13 and nozzles 15 to rotate through the air inlet pipe 2, and combining the two nozzles 15 corresponding to the axial and radial positions, multi-directional oxygen enrichment injection inside the kiln can be initially realized.

[0024] A rocker arm 24 is installed on the exhaust hood 13, and a slider 28 is slidably installed on the rocker arm 24. The slider 28 and the reversing groove 31 opened on the cover plate 3 are elliptical. When the intake pipe 2 rotates, the slider 28 is driven to slide synchronously through the reversing groove 31. In turn, the position of the exhaust hood 13 and the nozzle 15 changes through the rocker arm 24, and the radial and axial positions of the two nozzles 15 are switched synchronously. By using the cooperation of the elliptical reversing groove 31 and the slider 28, the rotational motion of the intake pipe 2 is converted into the linear sliding of the slider 28. Then, the axial and radial positions of the exhaust hood 13 and the nozzle 15 are switched synchronously through the rocker arm 24. No additional power is required to drive it. The structure is simplified while achieving precise switching of the nozzle 15 position and improving the adaptability of oxygen-enriched injection.

[0025] An adjusting plug 16 is inserted into the nozzle 15, and the outer wall of the adjusting plug 16 is provided with a conical surface 32. A guide frame 19 is installed on the adjusting plug 16, and a positioning plate 22 is installed on the air inlet pipe 2. The positioning plate 22 has a guide groove 23 that slides against the guide frame 19, and the guide groove 23 corresponding to the radial position is concave inward to guide the adjusting plug 16 away from the nozzle 15, thereby increasing the oxygen enrichment spray volume of the nozzle 15 in the radial position. The size of the spray channel of the nozzle 15 can be flexibly changed by the conical surface 32 of the adjusting plug 16. Combined with the concave design of the guide groove 23 on the positioning plate 22, the oxygen enrichment spray volume is automatically increased when the nozzle 15 is switched to the radial position to adapt to the oxygen demand of the radial area.

[0026] like Figures 1 to 10As shown, in a specific embodiment, an installation plate 7 is bolted to the side wall of the industrial kiln 1. A guide disc 9 is rotatably mounted on the installation plate 7. The guide disc 9 is connected to the side wall of the air inlet pipe 2. A drive assembly 8 is also installed at the end of the installation plate 7. The drive assembly 8 is used to drive the air inlet pipe 2 to rotate synchronously, thereby driving the nozzle 15 to rotate. The installation plate 7 provides stable mounting support for the guide disc 9 and the drive assembly 8, and the guide disc 9 provides guidance for the rotation of the air inlet pipe 2, ensuring smooth rotation of the air inlet pipe 2. (The drive assembly 8 is a structure in which a drive motor drives a gear set. This structure is prior art and is not shown in the accompanying drawings. When the gear set is working, the drive motor first drives one gear to rotate, and this gear then drives the other gear meshing with it to rotate synchronously. The other gear is connected to the side wall of the guide disc 9, thereby driving the guide disc 9 and the air inlet pipe 2 to rotate.) like Figures 1 to 10 As shown, a synchronization frame 6 is further installed on the mounting plate 7. The synchronization frame 6 is arched, and its center is connected to the side wall of the cover plate 3. An input pipe 4 is installed on the cover plate 3, and the input pipe 4 is connected to the air inlet pipe 2. A connecting flange 5 is installed at the end of the input pipe 4, which is used to connect the input pipe 4 to the oxygen enrichment delivery system. The synchronization frame 6 securely fixes the cover plate 3, ensuring that the cover plate 3 remains stationary. The connection between the input pipe 4 and the air inlet pipe 2 enables stable delivery of oxygen-enriched gas. The connecting flange 5 allows for quick connection of the input pipe 4 to the external oxygen enrichment delivery system, improving the convenience of equipment installation and maintenance.

[0027] Example 2: The difference between the above embodiments and this embodiment is that: Figures 1 to 10 As shown, a connecting seat 35 is installed on the air intake pipe 2, and a positioning shaft 14 is installed through the connecting seat 35. The positioning shaft 14 is connected to the positioning plate 22 and is rotatably connected to the outer wall of the exhaust hood 13. The connecting seat 35 provides stable mounting support for the positioning shaft 14, and the positioning shaft 14 is used to fix the positioning plate 22 and rotatably connect the exhaust hood 13, ensuring that the positioning plate 22 remains fixed and the exhaust hood 13 can rotate flexibly, providing a stable structural guarantee for the switching of the nozzle 15 position and the adjustment of the spray state.

[0028] like Figures 1 to 10As shown, in a specific embodiment, the emission hood 13 has a two-half structure, with a positioning ring 10 rotatably mounted between the two halves. A high-temperature resistant sealing plug is provided on the outer wall of the positioning ring 10 to seal the connection position. A bracket 12 is mounted on the outer wall of the positioning ring 10, and the bracket 12 is L-shaped. The side wall of the bracket 12 is mounted on the side wall of the intake pipe 2. A notch 11 is provided at the center of the positioning ring 10, and the notch 11 communicates with both the emission hood 13 and the intake pipe 2. The two-half emission hood 13 facilitates installation and maintenance. The positioning ring 10 is fixed to the intake pipe 2 by the bracket 12, providing support for the rotation of the emission hood 13. The high-temperature resistant sealing plug effectively seals the connection position between the emission hood 13 and the positioning ring 10, preventing leakage of oxygen-enriched gas.

[0029] like Figures 1 to 10 As shown, the rocker arm 24 further includes a groove 25, on which a guide rod 26 is slidably mounted. The diameter of the guide rod 26 and the width of the groove 25 are matched. A connecting bracket 27 is mounted at the end of the guide rod 26, and a slider 28 is mounted at the end of the connecting bracket 27. A protrusion 30 is mounted on the slider 28, and the end of the protrusion 30 is slidably connected to the surface of the reversing groove 31. A positioning rod 29 is installed through the slider 28. Both ends of the positioning rod 29 are mounted at the ends of the air inlet pipe 2. The ends of the air inlet pipe 2 are circular and matched with the shape of the cover plate 3. The positioning rod 29 is used to limit the movement direction of the slider 28. Through the matching sliding of the groove 25 and the guide rod 26, the sliding of the slider 28 is ensured to be smoothly transmitted to the rocker arm 24. The sliding connection between the protrusion 30 and the reversing groove 31 reduces friction. The positioning rod 29 can accurately limit the movement direction of the slider 28, avoiding adjustment jamming caused by slider 28 deviation, and ensuring smooth and stable switching of the nozzle 15 position.

[0030] Example 3: The difference between the above embodiments and this embodiment is that: Figures 1 to 10 As shown, a connecting cover 33 is installed on the top of the discharge hood 13, a nozzle 15 is installed on the side wall of the connecting cover 33, and a rod 17 is installed on the inner side wall of the connecting cover 33. The axis of the rod 17 and the axis of the nozzle 15 are both on the same straight line. The end of the rod 17 is movably inserted into the end of the adjusting plug 16. The rod 17 is used to limit the sliding of the adjusting plug 16 along the axis of the nozzle 15. The connecting cover 33 provides stable installation support for the nozzle 15, and the setting of the rod 17 can precisely limit the sliding direction of the adjusting plug 16, ensuring that the adjusting plug 16 always moves along the axis of the nozzle 15, avoiding the deviation of the adjusting plug 16 caused by the adjustment of the spray channel, and ensuring the accuracy of the oxygen-enriched spray state adjustment.

[0031] like Figures 1 to 10As shown, in a specific embodiment, a guide seat 20 is movably inserted into the outer wall of the guide frame 19, and the guide seat 20 is installed on the side wall of the discharge hood 13. The guide seat 20 is used to guide the guide frame 19 and the nozzle 15 to rotate synchronously. A slide rod 21 is installed at one end of the guide frame 19, and the slide rod 21 is slidably disposed on the guide groove 23. A collar 18 is installed at the other end of the guide frame 19, and a fixing sleeve 34 is installed inside the collar 18. The fixing sleeve 34 is installed on the side wall of the adjusting plug 16, and the insert rod 17 movably passes through the fixing sleeve 34. The guide seat 20 provides guidance for the guide frame 19, ensuring that the guide frame 19 and the nozzle 15 rotate synchronously. The sliding connection between the slide rod 21 and the guide groove 23 enables the precise movement of the guide frame 19. The cooperation between the collar 18 and the fixing sleeve 34 ensures that the movement of the guide frame 19 can be stably transmitted to the adjusting plug 16, realizing the smooth movement of the adjusting plug 16, and thus precisely adjusting the size of the spray channel of the nozzle 15.

[0032] The implementation principle of the system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns according to the present invention is as follows: First, the input pipe 4 is connected to the external oxygen-enriched delivery system via the connecting flange 5 at the end of the input pipe 4, allowing the oxygen-enriched gas to enter the air intake pipe 2 connected to it through the input pipe 4, thus completing the preparation for the delivery of the oxygen-enriched gas. Then, the drive assembly 8 installed at the end of the mounting plate 7 is activated (this drive assembly 8 is a structure in which a drive motor drives a gear set, which is existing technology and is not shown in the attached drawings. When the gear set is working, the drive motor first drives one of the gears to rotate, and this gear then drives the other gear meshing with it to rotate synchronously. The other gear is connected to the side wall of the guide plate 9, thereby driving the guide plate 9 and the air intake pipe 2 to rotate). When the drive assembly 8 is working, it drives the air intake pipe 2 to rotate synchronously. At the same time, the guide plate 9 connected to the side wall of the air intake pipe 2 rotates synchronously on the mounting plate 7, providing guidance and support for the rotation of the air intake pipe 2 and ensuring the stability of the rotation process of the air intake pipe 2.

[0033] When the intake pipe 2 rotates, it drives the exhaust hood 13 to rotate synchronously. The exhaust hood 13 is connected to the side wall of the intake pipe 2 via the positioning ring 10 and the bracket 12. The high-temperature resistant sealing plug on the outside of the positioning ring 10 can seal the connection between the exhaust hood 13 and the positioning ring 10 to prevent the leakage of oxygen-enriched gas. At the same time, the notch 11 in the center of the positioning ring 10 keeps the exhaust hood 13 connected to the intake pipe 2, ensuring that the oxygen-enriched gas in the intake pipe 2 can smoothly enter the interior of the exhaust hood 13 and then be sprayed out through a pair of nozzles 15 installed on the side wall of the top connecting cover 33 of the exhaust hood 13 to achieve oxygen-enriched combustion. Since the two nozzles 15 correspond to the axial and radial positions of the industrial kiln 1 respectively, with the radial nozzle closer to the combustion center of the kiln and the axial nozzle farther away from the combustion center, they can be adapted to the combustion needs of different positions in the initial state, ensuring uniform combustion in the kiln.

[0034] Meanwhile, the intake pipe 2 remains rotating, while the cover plate 3 remains stationary (the cover plate 3 is indirectly fixed to the mounting plate 7 via the synchronous frame 6, the synchronous frame 6 is arched and its center is connected to the side wall of the cover plate 3, and the mounting plate 7 is fixed to the side wall of the industrial kiln 1, thereby achieving the fixed positioning of the cover plate 3). The elliptical reversing groove 31 opened on the cover plate 3 remains stationary. When the intake pipe 2 rotates, the slider 28 rotates synchronously with the intake pipe 2. The protrusion 30 on the slider 28 is slidably connected to the surface of the stationary reversing groove 31, and the slider 28 is limited at the end of the intake pipe 2 by the positioning rod 29, which can limit the movement direction of the slider 28, so that during the rotation of the slider 28, it is driven by the stationary reversing groove 31 to slide synchronously along the direction of the positioning rod 29.

[0035] Furthermore, the slider 28 is connected to the light rod 26 via the connecting frame 27. Thus, when the slider 28 slides, it can drive the rocker arm 24 to move synchronously via the light rod 26. In turn, the rocker arm 24 drives the exhaust hood 13 to rotate around the positioning shaft 14, thereby realizing the position change of the exhaust hood 13 and the nozzle 15. This allows the radial and axial positions of the two nozzles 15 to switch synchronously, expanding the oxygen-enriched injection coverage and improving the combustion-supporting effect.

[0036] During the switching of the nozzle 15 position, the rotation of the discharge hood 13 will drive the guide seat 20 to move synchronously, and then the guide frame 19 will rotate synchronously with the nozzle 15. The slide rod 21 on one side of the guide frame 19 is slidably set in the guide groove 23 of the positioning plate 22. The positioning plate 22 is connected to the connecting seat 35 through the positioning shaft 14 and the position remains fixed. During the rotation of the guide frame 19, the protrusion at the end of the guide frame 19 slides inside the guide groove 23 which is in a fixed state. Since the guide groove 23 corresponding to the radial position is recessed inward, when the nozzle 15 is switched to the radial position, the slide rod 21 will slide along the recessed part of the guide groove 23, driving the guide frame 19 to move as a whole. Therefore, the movement of the guide frame 19 will drive the adjusting plug 16 away from the nozzle 15. The conical surface 32 of the outer wall of the adjusting plug 16 will increase the spray channel of the nozzle 15.

[0037] Specifically: When the nozzle 15 is switched to the radial position, it is closer to the combustion center of the kiln. At this time, it is necessary to increase the oxygen content to ensure complete combustion of the fuel. Therefore, the inner diameter of the radial injection channel of the adjusted nozzle 15 becomes larger, thereby increasing the injection content and oxygen enrichment concentration. When the nozzle 15 is switched to the axial position, it is farther away from the combustion center. The slide bar 21 slides along the non-recessed part of the guide groove 23, the adjusting plug 16 is reset, and the injection channel size of the nozzle 15 becomes smaller. By reducing the channel size, the oxygen enrichment injection distance is made farther, which is adapted to the long-distance requirements of axial injection. At the same time, the oxygen enrichment injection volume is restored to the state adapted to axial injection.

[0038] Throughout the process, oxygen-enriched gas is delivered to the nozzle 15 through the air inlet pipe 2, the exhaust hood 13, and the connecting hood 33. The nozzle 15 achieves comprehensive and uniform oxygen-enriched injection in the axial and radial directions inside the industrial kiln 1 by rotating and switching positions. At the same time, the amount of oxygen-enriched injection is automatically adjusted according to the injection position to ensure that the fuel in the kiln is fully combusted, reduce fuel consumption and exhaust emissions, and ultimately achieve the effect of oxygen-enriched combustion, energy saving and emission reduction in the industrial kiln.

[0039] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns, comprising an industrial kiln (1), characterized in that: An air inlet pipe (2) is rotatably installed on the industrial kiln (1), and a cover plate (3) is installed at the end of the air inlet pipe (2). An exhaust hood (13) is rotatably installed on the air inlet pipe (2) located inside the industrial kiln (1). A pair of nozzles (15) are installed on the exhaust hood (13), and the two nozzles (15) correspond to the axial position and radial position of the industrial kiln (1) respectively. When the air inlet pipe (2) rotates, it synchronously drives the nozzles (15) to rotate. A rocker arm (24) is installed on the exhaust hood (13), and a slider (28) is slidably installed on the rocker arm (24). The slider (28) and the reversing groove (31) opened on the cover plate (3) are elliptical. When the air intake pipe (2) rotates, the slider (28) is driven to slide synchronously through the reversing groove (31), and then the position of the exhaust hood (13) and the nozzle (15) changes through the rocker arm (24). The radial and axial positions of the two nozzles (15) are switched synchronously. An adjusting plug (16) is inserted into the nozzle (15), and a tapered surface (32) is provided on the outer wall of the adjusting plug (16). A guide frame (19) is installed on the adjusting plug (16). A positioning plate (22) is installed on the air inlet pipe (2), and a guide groove (23) is opened on the positioning plate (22) to slide relative to the guide frame (19). The guide groove (23) corresponding to the radial position is concave inward to guide the adjusting plug (16) away from the nozzle (15) and increase the amount of rich spray from the nozzle (15) in the radial position.

2. The system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns according to claim 1, characterized in that, The industrial kiln (1) has a mounting plate (7) installed on its side wall by bolts. A guide plate (9) is rotatably mounted on the mounting plate (7). The guide plate (9) is connected to the side wall of the air inlet pipe (2). A drive assembly (8) is also installed at the end of the mounting plate (7). The drive assembly (8) is used to drive the air inlet pipe (2) to rotate synchronously, thereby driving the nozzle (15) to rotate.

3. The system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns according to claim 2, characterized in that, A timing frame (6) is installed on the mounting plate (7). The timing frame (6) is arched. The center of the timing frame (6) is connected to the side wall of the cover plate (3). An input pipe (4) is installed on the cover plate (3). The input pipe (4) is connected to the air inlet pipe (2). A connecting flange (5) is installed at the end of the input pipe (4). The connecting flange (5) is used to connect the input pipe (4) to the enrichment delivery system.

4. The system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns according to claim 1, characterized in that, A connecting seat (35) is installed on the air intake pipe (2), and a positioning shaft (14) is installed through the connecting seat (35). The positioning shaft (14) is connected to the positioning plate (22), and the positioning shaft (14) is rotatably connected to the outer wall of the exhaust hood (13).

5. The system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns according to claim 1, characterized in that, The exhaust hood (13) is a two-half structure, and a positioning ring (10) is rotatably installed between the two halves. A high-temperature resistant sealing plug is provided on the outer wall of the positioning ring (10), and the high-temperature resistant sealing plug is used to seal the connection position. A bracket (12) is installed on the outer wall of the positioning ring (10), and the bracket (12) is L-shaped. The side wall of the bracket (12) is installed on the side wall of the air intake pipe (2). A notch (11) is opened at the center of the positioning ring (10), and the notch (11) is connected to the exhaust hood (13) and the air intake pipe (2).

6. The system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns according to claim 1, characterized in that, The rocker arm (24) has a strip groove (25) and a light rod (26) is slidably installed on the strip groove (25). The diameter of the light rod (26) and the width of the strip groove (25) are adapted to each other. A connecting frame (27) is installed at the end of the light rod (26). A slider (28) is installed at the end of the connecting frame (27). A protrusion (30) is installed on the slider (28). The end of the protrusion (30) is slidably connected to the surface of the reversing groove (31).

7. A system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns according to claim 6, characterized in that, A positioning rod (29) is installed inside the slider (28). The two ends of the positioning rod (29) are installed at the ends of the air inlet pipe (2). The ends of the air inlet pipe (2) are round and are adapted to the shape of the cover plate (3). The positioning rod (29) is used to limit the movement direction of the slider (28).

8. The system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns according to claim 1, characterized in that, The top of the discharge hood (13) is equipped with a connecting cover (33), and a nozzle (15) is installed on the side wall of the connecting cover (33). A plug rod (17) is installed on the inner side wall of the connecting cover (33). The axis of the plug rod (17) and the axis of the nozzle (15) are on the same straight line. The end of the plug rod (17) is movably inserted into the end of the adjusting plug (16). The plug rod (17) is used to limit the sliding of the adjusting plug (16) along the axis of the nozzle (15).

9. A system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns according to claim 1, characterized in that, The guide frame (19) is movably connected to the outer wall of the guide seat (20), and the guide seat (20) is installed on the side wall of the discharge hood (13). The guide seat (20) is used to guide the guide frame (19) and the nozzle (15) to rotate synchronously.

10. A system for achieving oxygen-enriched combustion, energy saving, and emission reduction in industrial kilns according to claim 8, characterized in that, The guide frame (19) has a slide rod (21) installed at one end of one side. The slide rod (21) is slidably disposed on the guide groove (23). The guide frame (19) has a collar (18) installed at the other end. A fixing sleeve (34) is installed inside the collar (18). The fixing sleeve (34) is installed on the side wall of the adjusting plug (16), and the insert rod (17) moves through the fixing sleeve (34).

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