Low-nitrogen oxygen burner structure for aluminum melting furnace

Abstract

The invention provides a low-nitrogen oxygen burner structure for an aluminum melting furnace, and relates to the field of burners. The low-nitrogen-oxygen burner structure for the aluminum melting furnace comprises a first burner, a second burner, a first heat storage box and a second heat storage box, the top of the first burner and the top of the second burner are both communicated with gas pipes, and the interior of the first burner and the interior of the second burner are both fixedly connected with two fixing rings; spray pipes are fixedly connected to the interiors of the first burner and the second burner, and two heat storage beds are fixedly connected to the interiors of the first heat storage box and the second heat storage box. According to the burner, the problems that when a traditional burner works, fuel and air are not fully mixed, the local oxygen concentration is too high, under the high-temperature environment, generation of nitric oxide is promoted, temperature distribution in an aluminum melting furnace is not uniform, the combustion efficiency is low, the aluminum alloy smelting quality is affected, energy is wasted, and the production cost is increased are solved.

Description

Technical Field

[0001] The present invention relates to the field of burners, and particularly to a low-nitrogen and oxygen burner structure for an aluminum melting furnace. Background Art

[0002] Aluminum is widely used in metals. Aluminum has the characteristics of low density, low melting point and easy processing. Aluminum can be made into aluminum alloy by adding other metal materials. Inside the aluminum melting furnace, the burner heats the aluminum blocks in the melting furnace to melt them. The aluminum furnace is a new type of high-efficiency energy-saving furnace developed according to the aluminum melting process. It can well meet the requirements in the aluminum melting process: strict requirements for alloy composition, discontinuous production, relatively large single-furnace capacity, etc., achieving the effects of reducing consumption, reducing burning loss, improving product quality, reducing labor intensity, improving working conditions and increasing production efficiency. It is suitable for intermittent operation and melting with a large amount of alloy and return materials.

[0003] After retrieval, in the prior art: Natural gas burners are widely used for heat supply in aluminum melting furnaces. When traditional burners work, the flame is concentrated and sprayed, resulting in insufficient mixing of fuel and air, and too high local oxygen concentration. In a high-temperature environment, this not only promotes the generation of nitrogen oxides, pollutes the environment and increases the environmental protection cost of enterprises, but also makes the temperature distribution in the aluminum melting furnace uneven, leading to low combustion efficiency, affecting the melting quality of aluminum alloy, causing energy waste and increasing production costs.

[0004] Therefore, those skilled in the art have provided a low-nitrogen and oxygen burner structure for an aluminum melting furnace to solve the problems raised in the above background art. Summary of the Invention

[0005] 1. Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides a low-nitrogen and oxygen burner structure for an aluminum melting furnace, which solves the problems that when a traditional burner works, the fuel and air are not sufficiently mixed, the local oxygen concentration is too high, and in a high-temperature environment, it not only promotes the generation of nitrogen oxides, but also makes the temperature distribution in the aluminum melting furnace uneven, resulting in low combustion efficiency, affecting the melting quality of aluminum alloy, causing energy waste and increasing production costs.

[0006] 2. Technical Solutions To achieve the above purposes, the present invention is realized through the following technical solutions: A low-nitrogen and oxygen burner structure for an aluminum melting furnace, comprising a first burner, a second burner, a first regenerative box, and a second regenerative box. The tops of the first burner and the second burner are both connected to a gas pipe. Two fixing rings are fixedly connected inside the first burner and the second burner respectively. A spray pipe is fixedly connected inside the first burner and the second burner. Two regenerative beds are fixedly connected inside the first regenerative box and the second regenerative box respectively. Feeding plates are rotatably connected to the inner walls of two sides of the first regenerative box and the second regenerative box respectively. A plurality of alumina balls are arranged inside the first regenerative box and the second regenerative box. Through holes are formed at the tops of the first regenerative box and the second regenerative box and are fixedly connected to a feeding box. Through holes are formed on the outer sides of the first burner and the second burner and are fixedly connected to a smoke exhaust pipe. An electric valve is fixedly connected inside the smoke exhaust pipe. Through holes are formed on the outer sides of the first regenerative box and the second regenerative box and are fixedly connected to a smoke collecting pipe. A fixing plate is fixedly connected between the first regenerative box and the second regenerative box. A combustion-supporting fan is fixedly connected to the top of the fixing plate. The blowing port of the combustion-supporting fan is connected to a second three-way electromagnetic valve. Combustion-supporting pipes are fixedly connected to both ends of the second three-way electromagnetic valve away from the combustion-supporting fan. One ends of the two combustion-supporting pipes away from the second three-way electromagnetic valve are respectively connected to the first burner and the second burner. The suction port of the combustion-supporting fan is connected to a third three-way electromagnetic valve; Through the above technical solution, during use, the ratio among air, gas, and oxygen can be adjusted, and the three can be fully mixed to ensure the full combustion of the gas, solving the problems that in the traditional burner, the fuel and air are not fully mixed, the local oxygen concentration is too high, in a high-temperature environment, it not only promotes the generation of nitrogen oxides, but also causes uneven temperature distribution in the aluminum melting furnace, resulting in low combustion efficiency, affecting the quality of aluminum alloy smelting, causing energy waste, and increasing production costs.

[0007] Further, one end of the gas pipe is connected to a gas flow control and monitoring valve, the end of the gas flow control and monitoring valve away from the gas pipe is connected to a two-way electromagnetic valve, and an air flow monitoring and control valve is fixedly connected inside the combustion-supporting pipe; Through the above technical solution, the gas flow control and monitoring valve and the air flow monitoring and control valve cooperate to adjust the ratio between gas and air to make it reach the best combination, avoiding problems such as uneven combustion, low thermal efficiency, and high nitrogen oxide emissions caused by poor ratio.

[0008] Furthermore, blocking blocks are fixedly connected inside both the first burner and the second burner. A gas outlet is formed inside the blocking block, and the gas outlet is communicated with a gas pipe. An air outlet is formed inside the blocking block, and the air outlet is communicated with the gas outlet. The included angle between the air outlet and the gas outlet is an acute angle. A spiral blade is fixedly connected between the two fixing rings. The number of the spiral blades is three, and the three spiral blades are evenly arranged in an array on the side surface of the fixing ring; Through the above technical solution, the gas outlet and the air outlet are distributed in a triangular shape, and the gas outlet has a certain inclination angle. When the gas and air enter the combustion area, a countercurrent will be formed, enabling the gas and air to be fully and evenly mixed. The spiral blade can disturb the flow of the gas, causing the gas to flow everywhere, thereby enabling the gas and air to be fully mixed.

[0009] Furthermore, a tapered section is provided inside one end of the nozzle close to the fixing ring, and a divergent section is provided inside the other end of the nozzle far from the fixing ring. A throat is provided inside the nozzle, and both ends of the throat are communicated with the divergent section and the tapered section respectively. Ignition guns are fixedly connected to the outer sides of both the first burner and the second burner. The ignition ends of the ignition guns are located inside the first burner and the second burner. Fire detection tubes are fixedly connected to the outer sides of both the first burner and the second burner. The detection ends of the fire detection tubes are located inside the first burner and the second burner; Through the above technical solution, the nozzle can enable the high-speed jet of the gas, promoting the mixing effect and ensuring the stable jet of the gas. The ignition gun can continuously ignite the gas, and the fire detection tube can detect the flame ejected by the burner, and can timely close the gas valve after a problem occurs with the burner.

[0010] Furthermore, the regenerative bed is inclined. The feeding plate is located between the two regenerative beds. The regenerative bed is made of refractory material. A plurality of holes are formed inside the regenerative bed. The outer shells of both the first regenerative box and the second regenerative box are made of high-temperature resistant alloy material, and a ceramic fiber heat insulation layer is laid on the inner layer of the first regenerative box and the second regenerative box; Through the above technical solution, the regenerative bed can recover and utilize the high temperature of the waste gas, heat the air, and assist in burning the gas, saving the consumption of resources and accelerating the combustion efficiency of the gas.

[0011] Furthermore, rotary plates are rotatably connected to the outer sides of both the first regenerative box and the second regenerative box. The rotary plates are fixedly connected to the feeding plate. Air rods are fixedly connected to the sides of both the first regenerative box and the second regenerative box. The piston rods of the air rods are rotatably connected to one end of the rotary plate far from the feeding plate. Through holes are formed and discharge doors are rotatably connected to the outer sides of both the first regenerative box and the second regenerative box. The bottoms of both the first regenerative box and the second regenerative box are horizontally inclined; Through the above technical solution, after the service life of the alumina balls is up, they can be quickly replaced, increasing the service life of the first heat storage tank and the second heat storage tank. The air rod can automatically discharge the alumina balls without manual control.

[0012] Further, a smoke exhaust fan is provided between the first heat storage tank and the second heat storage tank. The suction port of the smoke exhaust fan is connected to a first three-way solenoid valve. The two ends of the first three-way solenoid valve away from the smoke exhaust fan are respectively connected to two smoke collecting pipes. The smoke exhaust pipe is located at the top of one end of the first heat storage tank, and the smoke collecting pipe is located at the bottom of the other end of the first heat storage tank. Through the above technical solution, the smoke exhaust fan can divert the high-temperature waste gas, so that the high-temperature waste gas passes through the alumina balls and then is discharged outside the first heat storage tank and the second heat storage tank. The first three-way solenoid valve can separately open or close the first heat storage tank and the second heat storage tank, so that the smoke exhaust fan can extract the waste gas.

[0013] Further, both ends of the third three-way solenoid valve away from the combustion-supporting fan are fixedly connected with air suction pipes. The ends of the air suction pipes away from the third three-way solenoid valve are respectively connected to the first heat storage tank and the second heat storage tank. Through holes are provided on the outer sides of the first heat storage tank and the second heat storage tank and are fixedly connected with air inlet pipes. The air inlet pipes are located at the bottom of one end of the first heat storage tank, and the air suction pipes are located at the top of the other end of the first heat storage tank. Through the above technical solution, the combustion-supporting fan can suck air to increase the combustion of the gas. The third three-way electric valve can adjust the flow direction of the air, so that it can separately extract the air inside the first heat storage tank and the second heat storage tank.

[0014] 3. Beneficial effects The present invention provides a low-nitrogen and oxygen burner structure for an aluminum melting furnace, having the following beneficial effects: 1. The present invention provides a low-nitrogen and oxygen burner structure for an aluminum melting furnace. Through the settings of the first burner, the second burner, the first heat storage tank, the second heat storage tank, the gas flow control and monitoring valve, the air outlet, the air flow control and monitoring valve, the spiral blades, and the nozzle, the device can adjust the ratio among air, gas, and oxygen during use, and make the three fully mixed to ensure the full combustion of the gas, solving the problems that in the traditional burner, the fuel and air are not fully mixed during operation, the local oxygen concentration is too high, in a high-temperature environment, it not only promotes the generation of nitrogen oxides, but also makes the temperature distribution in the aluminum melting furnace uneven, resulting in low combustion efficiency, affecting the quality of aluminum alloy smelting, causing energy waste, and increasing production costs.

[0015] 2. The present invention provides a low-nitrogen and oxygen burner structure for an aluminum melting furnace. Through the settings of a first regenerative box, a second regenerative box, an exhaust gas fan, a combustion-supporting fan, a regenerative bed, and alumina balls, the device is capable of recovering the waste heat of exhaust gas, then preheating the combustion-supporting air, enabling the gas to burn quickly and fully, achieving efficient heat storage, and ensuring the safe and stable operation of the device during heat storage. This reduces resource consumption and increases the combustion efficiency of the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an axonometric schematic diagram of the present invention; Figure 2 is an axial sectional schematic diagram of the present invention; Figure 3 is an axonometric schematic diagram of the first burner of the present invention; Figure 4 is an axial sectional schematic diagram of the first burner of the present invention; Figure 5 is a side axonometric schematic diagram of the present invention; Figure 6 is an axial sectional schematic diagram of the first regenerative box of the present invention; Figure 7 For the present invention Figure 5 is an enlarged schematic diagram at position A.

[0017] Among them, 1. First burner; 2. Second burner; 3. First regenerative box; 4. Second regenerative box; 5. Gas pipe; 6. Gas flow control and monitoring valve; 7. Two-way solenoid valve; 8. Gas outlet; 9. Air outlet; 10. Plug; 11. Fixed ring; 12. Spiral blade; 13. Nozzle; 14. Converging section; 15. Throat; 16. Diverging section; 17. Regenerative bed; 18. Discharge plate; 19. Alumina balls; 20. Discharge box; 21. Rotating plate; 22. Air rod; 23. Discharge door; 24. Exhaust pipe; 25. Electric valve; 26. Smoke collecting pipe; 27. Exhaust gas fan; 28. First three-way solenoid valve; 29. Fixed plate; 30. Combustion-supporting fan; 31. Second three-way solenoid valve; 32. Combustion-supporting pipe; 33. Air flow monitoring and control valve; 34. Third three-way solenoid valve; 35. Suction pipe; 36. Inlet pipe; 37. Ignition gun; 38. Flame detector pipe DETAILED DESCRIPTION OF THE INVENTION The following will clearly and completely describe the technical solutions in the specific embodiments of the present invention in conjunction with the drawings in the specific embodiments of the present invention. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, rather than all of the specific embodiments. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Specific implementation mode 1: Such as Figures 1-4As shown in the figure, the specific embodiment of the present invention provides a low-nitrogen and oxygen burner structure for an aluminum melting furnace, including a first burner 1, a second burner 2, a first regenerative box 3 and a second regenerative box 4. The tops of the first burner 1 and the second burner 2 are both connected to a gas pipe 5. Two fixing rings 11 are fixedly connected inside both the first burner 1 and the second burner 2. A spray pipe 13 is fixedly connected inside both the first burner 1 and the second burner 2. Two regenerative beds 17 are fixedly connected inside both the first regenerative box 3 and the second regenerative box 4. One of the two inner walls of the first regenerative box 3 and the second regenerative box 4 is rotatably connected with a discharging plate 18. A plurality of alumina balls 19 are arranged inside both the first regenerative box 3 and the second regenerative box 4. Through holes are opened at the tops of both the first regenerative box 3 and the second regenerative box 4 and a discharging box 20 is fixedly connected. Through holes are opened on the outer sides of both the first burner 1 and the second burner 2 and a smoke exhaust pipe 24 is fixedly connected. An electric valve 25 is fixedly connected inside the smoke exhaust pipe 24. Through holes are opened on the outer sides of both the first regenerative box 3 and the second regenerative box 4 and a smoke collecting pipe 26 is fixedly connected. A fixing plate 29 is fixedly connected between the first regenerative box 3 and the second regenerative box 4. A combustion-supporting fan 30 is fixedly connected to the top of the fixing plate 29. The blowing port of the combustion-supporting fan 30 is connected to a second three-way electromagnetic valve 31. The two ends of the second three-way electromagnetic valve 31 away from the combustion-supporting fan 30 are both fixedly connected to a combustion-supporting pipe 32. The ends of the two combustion-supporting pipes 32 away from the second three-way electromagnetic valve 31 are respectively connected to the first burner 1 and the second burner 2. The suction port of the combustion-supporting fan 30 is connected to a third three-way electromagnetic valve 34. One end of the gas pipe 5 is connected to a gas flow control and monitoring valve 6. The end of the gas flow control and monitoring valve 6 away from the gas pipe 5 is connected to a two-way electromagnetic valve 7. An air flow monitoring and control valve 33 is fixedly connected inside the combustion-supporting pipe 32. A blocking block 10 is fixedly connected inside both the first burner 1 and the second burner 2. A gas outlet 8 is opened inside the blocking block 10. The gas outlet 8 is connected to the gas pipe 5. An air outlet 9 is opened inside the blocking block 10. The air outlet 9 is connected to the combustion-supporting pipe 32. The air outlet 9 is connected to the gas outlet 8. The included angle between the air outlet 9 and the gas outlet 8 is an acute angle. A spiral blade 12 is fixedly connected between the two fixing rings 11. The number of the spiral blades 12 is three. The three spiral blades 12 are evenly arranged on the side surface of the fixing ring 11. A tapered section 14 is arranged inside the end of the spray pipe 13 close to the fixing ring 11. An expanding section 16 is arranged inside the end of the spray pipe 13 away from the fixing ring 11. A throat 15 is arranged inside the spray pipe 13. The two ends of the throat 15 are respectively connected to the expanding section 16 and the tapered section 14. Ignition guns 37 are fixedly connected to the outer sides of both the first burner 1 and the second burner 2. The ignition ends of the ignition guns 37 are located inside the first burner 1 and the second burner 2. Flame detection pipes 38 are fixedly connected to the outer sides of both the first burner 1 and the second burner 2. The detection ends of the flame detection pipes 38 are located inside the first burner 1 and the second burner 2.Both ends of the third three-way electromagnetic valve 34 far from the combustion-supporting blower 30 are fixedly connected with air suction pipes 35. One ends of the air suction pipes 35 far from the third three-way electromagnetic valve 34 are respectively communicated with the first regenerative box 3 and the second regenerative box 4. Through holes are formed in the outer sides of the first regenerative box 3 and the second regenerative box 4 and fixedly connected with air inlet pipes 36. The air inlet pipes 36 are located at the bottom of one end of the first regenerative box 3, and the air suction pipes 35 are located at the top of the other end of the first regenerative box 3.,

[0019] For the low-nitrogen and oxygen burner structure for an aluminum melting furnace in this embodiment, it should be noted that through the settings of the first burner 1, the second burner 2, the first regenerative box 3, the second regenerative box 4, the gas flow control and monitoring valve 6, the air outlet 9, the air flow monitoring control valve 33, the spiral blade 12 and the nozzle 13, the device can adjust the ratio among air, gas and oxygen during use, and make the three fully mixed to ensure the full combustion of the gas, solving the problems that in the traditional burner, the fuel and air are not fully mixed during operation, the local oxygen concentration is too high, in a high-temperature environment, it not only promotes the generation of nitrogen oxides, but also makes the temperature distribution in the aluminum melting furnace uneven, resulting in low combustion efficiency, affecting the quality of aluminum alloy melting, causing energy waste and increasing production costs.

[0020] Working principle: When in use, install the device and debug the program of the device through an external PLC controller so that it can control the electronic components inside the device. During installation, connect the external gas channel to the gas pipe 5 so that gas can enter the inside of the first burner 1 and the second burner 2 through the gas pipe 5. Connect the air inlet pipe 36 to an external fan, and then the device can be used. When in use, the controller closes the two-way solenoid valve 7 of the second burner 2 and opens the two-way solenoid valve 7 of the first burner 1, so that gas enters the inside of the first burner 1 through the gas pipe 5. When entering, the gas passes through the gas flow control and monitoring valve 6 to monitor the gas flow. Then the gas enters the inside of the plug 10. At this time, the gas is located inside the gas outlet 8. At this time, the external fan conveys air into the inside of the second regenerative box 3 through the air inlet pipe 36. Then the combustion-supporting fan 30 is turned on. At this time, the end of the second three-way solenoid valve 31 connected to the second regenerative box 4 is closed, so that the combustion-supporting fan 30 absorbs and extracts the air inside the first regenerative box 3. After that, the extracted combustion-supporting air enters the inside of the first burner 1 through the combustion-supporting pipe 32. When entering, the air flow can be regulated by the air flow monitoring and control valve 33 to match the gas volume. Then the air enters the inside of the plug 10 and is located inside the air outlet 9. After that, the gas starts to collide with the air inside the air outlet 9 through the gas outlet 8 to mix, and blows the gas again to make the gas flow again, so that the gas and air are mixed. After that, the gas doped with air passes through the fixed ring 11 and contacts the spiral blade 12. The spiral blade 12 disturbs the gas flow and mixes the air and gas again. When mixing, the gas doped with air then passes through the nozzle 13 and, through the cooperation of the converging section 14, the throat 15 and the diverging section 16, the gas flow rate is accelerated. Then the gas passes through the igniter 37, and the igniter 37 ignites the gas to generate a flame. The generated flame sprays out from the first burner 1 to carry out work. At this time, the flame detector tube 38 monitors the flame. When there is no flame, the two-way solenoid valve 7 can be closed in time through the controller. When the flame of the first burner 1 sprays out for work, the second burner 2 absorbs the generated high-temperature waste gas and conveys the high-temperature waste gas to the inside of the second regenerative box 4 through the exhaust pipe 24 to complete the collection of waste gas. After that, the first burner 1 and the second burner 2 can be swapped every once in a while so that the second burner 2 works and the first burner 1 absorbs the waste gas. Specific implementation method 2: As Figures 5-7As shown in the figure, the specific embodiment of the present invention provides a low-nitrogen and low-oxygen burner structure for an aluminum melting furnace. The regenerative bed 17 is inclined, and the discharging plate 18 is located between the two regenerative beds 17. The regenerative bed 17 is made of refractory material, and a plurality of holes are formed inside the regenerative bed 17. The outer shells of the first regenerative box 3 and the second regenerative box 4 are both made of high-temperature resistant alloy materials. The inner layers of the first regenerative box 3 and the second regenerative box 4 are lined with ceramic fiber heat insulation layers. Rotating plates 21 are rotatably connected to the outer sides of the first regenerative box 3 and the second regenerative box 4. The rotating plates 21 are fixedly connected to the discharging plate 18. Air rods 22 are fixedly connected to the sides of the first regenerative box 3 and the second regenerative box 4. The piston rods of the air rods 22 are rotatably connected to the ends of the rotating plates 21 away from the discharging plate 18. Through holes are formed in the outer sides of the first regenerative box 3 and the second regenerative box 4 and discharge doors 23 are rotatably connected thereto. The bottoms of the first regenerative box 3 and the second regenerative box 4 are both horizontally inclined. A smoke exhaust fan 27 is provided between the first regenerative box 3 and the second regenerative box 4. The suction port of the smoke exhaust fan 27 is communicated with a first three-way electromagnetic valve 28. The two ends of the first three-way electromagnetic valve 28 away from the smoke exhaust fan 27 are respectively communicated with two smoke collecting pipes 26. The smoke exhaust pipe 24 is located at the top of one end of the first regenerative box 3, and the smoke collecting pipe 26 is located at the bottom of the other end of the first regenerative box 3.

[0022] Regarding the low-nitrogen and low-oxygen burner structure for an aluminum melting furnace in this embodiment, it should be noted that through the settings of the first regenerative box 3, the second regenerative box 4, the smoke exhaust fan 27, the combustion-supporting fan 30, the regenerative bed 17, and the alumina balls 19, the device is capable of recovering the waste heat of the exhaust gas, then preheating the combustion-supporting air, so that the gas can burn quickly and fully, achieving efficient heat storage, and the device can operate safely and stably during heat storage, reducing the consumption of resources and increasing the combustion efficiency of the gas.

[0023] Working principle: During use, the first burner 1 ejects flames to work. The second burner 2 collects high-temperature waste gas through the exhaust pipe 24. The collected waste gas flows into the interior of the second heat storage tank 4. After that, the waste gas contacts the alumina balls 19 and exchanges heat (both heating and cooling) with the alumina balls 19 during the contact, thereby increasing the temperature of the alumina balls 19 and decreasing its own temperature. At this time, the exhaust fan 27 is started. When starting, the first three-way electromagnetic valve 28 closes the connection with the first heat storage tank 4, so that the exhaust fan 27 only extracts the waste gas inside the second heat storage tank 4. When extracting, the waste gas passes through the alumina balls 19 and through the heat storage bed 17, and then is extracted and discharged by the exhaust fan 27. After the first burner 1 works for a period of time, the first burner 1 is closed and absorbs the waste gas. The second burner 2 is connected to the gas for work. When working, the first three-way electromagnetic valve 28 closes the connection with the second heat storage tank 4 and opens the connection with the first heat storage tank 3, so as to suck the waste gas inside the first heat storage tank 3. At this time, the external fan conveys the external air into the interior of the second heat storage tank 4. The air contacts the heated alumina balls 19 and exchanges heat, heating the air and cooling the alumina balls 19. Then the heated air can be used for combustion support to accelerate the combustion of the gas. After the device has been used for a period of time, the discharge door 23 can be opened to clean the residues inside the first heat storage tank 3 and the second heat storage tank 4. After cleaning, the air rod 22 can be started to rotate the rotating plate 21. After the rotating plate 21 rotates, the feeding plate 18 rotates. After the feeding plate 18 rotates, a gap appears between it and the heat storage bed 17. Then the alumina balls 19 slide on the heat storage bed 17 and are collected by the staff through the discharge door 23. After the collection is completed, the feeding plate 18 can be closed, and then the feeding box 20 can be opened to put new alumina balls 19 into the interior of the first heat storage tank 3 and the second heat storage tank 4.

[0024] Although specific embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these specific embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-nitrogen and oxygen burner structure for an aluminum melting furnace, comprising a first burner (1), a second burner (2), a first regenerative box (3), and a second regenerative box (4), characterized in that: The tops of the first burner (1) and the second burner (2) are both connected to a gas pipe (5). Inside the first burner (1) and the second burner (2), two fixing rings (11) are fixedly connected. Inside the first burner (1) and the second burner (2), a spray pipe (13) is fixedly connected. Inside the first regenerator box (3) and the second regenerator box (4), two regenerator beds (17) are fixedly connected. On two inner walls of the first regenerator box (3) and the second regenerator box (4), a discharging plate (18) is rotatably connected. Inside the first regenerator box (3) and the second regenerator box (4), a plurality of alumina balls (19) are provided. Through holes are formed in the tops of the first regenerator box (3) and the second regenerator box (4), and a discharging box (20) is fixedly connected. Through holes are formed in the outer sides of the first burner (1) and the second burner (2), and a smoke exhaust pipe (24) is fixedly connected. An electric valve (25) is fixedly connected inside the smoke exhaust pipe (24). Through holes are formed in the outer sides of the first regenerator box (3) and the second regenerator box (4), and a smoke collecting pipe (26) is fixedly connected. A fixing plate (29) is fixedly connected between the first regenerator box (3) and the second regenerator box (4). A combustion-supporting blower (30) is fixedly connected to the top of the fixing plate (29). The blowing port of the combustion-supporting blower (30) is connected to a second three-way electromagnetic valve (31). At both ends of the second three-way electromagnetic valve (31) away from the combustion-supporting blower (30), combustion-supporting pipes (32) are fixedly connected. One ends of the two combustion-supporting pipes (32) away from the second three-way electromagnetic valve (31) are respectively connected to the first burner (1) and the second burner (2). The suction port of the combustion-supporting blower (30) is connected to a third three-way electromagnetic valve (34).

2. The low-nitrogen and oxygen burner structure for an aluminum melting furnace according to claim 1, characterized in that: One end of the gas pipe (5) is connected to a gas flow control and monitoring valve (6). One end of the gas flow control and monitoring valve (6) away from the gas pipe (5) is connected to a two-way electromagnetic valve (7). An air flow monitoring and control valve (33) is fixedly connected inside the combustion-supporting pipe (32).

3. The low-nitrogen and oxygen burner structure for an aluminum melting furnace according to claim 1, characterized in that: Inside the first burner (1) and the second burner (2), a plug (10) is fixedly connected. A gas outlet (8) is formed inside the plug (10), and the gas outlet (8) is connected to the gas pipe (5). An air outlet (9) is formed inside the plug (10), and the air outlet (9) is connected to the combustion-supporting pipe (32). The air outlet (9) is connected to the gas outlet (8). The included angle between the air outlet (9) and the gas outlet (8) is an acute angle. A spiral blade (12) is fixedly connected between the two fixing rings (11). The number of the spiral blades (12) is three, and the three spiral blades (12) are evenly arranged on the side surface of the fixing ring (11).

4. The low-nitrogen and oxygen burner structure for an aluminum melting furnace according to claim 1, characterized in that: Inside one end of the nozzle (13) adjacent to the fixed ring (11), there is a converging section (14). Inside the other end of the nozzle (13) away from the fixed ring (11), there is a diverging section (16). Inside the nozzle (13), there is a throat (15). The two ends of the throat (15) are respectively connected to the diverging section (16) and the converging section (14). On the outer sides of both the first burner (1) and the second burner (2), there is a fixed connection with an igniter gun (37). The ignition end of the igniter gun (37) is located inside the first burner (1) and the second burner (2). On the outer sides of both the first burner (1) and the second burner (2), there is a fixed connection with a flame detector tube (38). The detection end of the flame detector tube (38) is located inside the first burner (1) and the second burner (2).

5. The low-nitrogen and oxygen burner structure for an aluminum melting furnace according to claim 1, characterized in that: The regenerative bed (17) is inclined. The discharging plate (18) is located between the two regenerative beds (17). The regenerative bed (17) is made of refractory material. Inside the regenerative bed (17), there are multiple holes opened. The outer shells of both the first regenerative box (3) and the second regenerative box (4) are made of high-temperature resistant alloy material, and a ceramic fiber heat insulation layer is laid on the inner layer of the first regenerative box (3) and the second regenerative box (4).

6. The low-nitrogen and oxygen burner structure for an aluminum melting furnace according to claim 1, characterized in that: On the outer sides of both the first regenerative box (3) and the second regenerative box (4), there is a rotatable connection with a rotating plate (21). The rotating plate (21) is fixedly connected to the discharging plate (18). On the sides of both the first regenerative box (3) and the second regenerative box (4), there is a fixed connection with a pneumatic rod (22). The piston rod of the pneumatic rod (22) is rotatably connected to one end of the rotating plate (21) away from the discharging plate (18). On the outer sides of both the first regenerative box (3) and the second regenerative box (4), there are through holes opened and a discharging door (23) is rotatably connected. The bottoms of both the first regenerative box (3) and the second regenerative box (4) are horizontally inclined.

7. The low-nitrogen and oxygen burner structure for an aluminum melting furnace according to claim 1, characterized in that: Between the first regenerative box (3) and the second regenerative box (4), there is a smoke exhaust fan (27). The suction port of the smoke exhaust fan (27) is connected to a first three-way electromagnetic valve (28). The two ends of the first three-way electromagnetic valve (28) away from the smoke exhaust fan (27) are respectively connected to two smoke collecting pipes (26). The smoke exhaust pipe (24) is located at the top of one end of the first regenerative box (3), and the smoke collecting pipe (26) is at the bottom of the other end of the first regenerative box (3).

8. The low-nitrogen and oxygen burner structure for an aluminum melting furnace according to claim 1, characterized in that: The two ends of the third three-way electromagnetic valve (34) away from the combustion-supporting fan (30) are both fixedly connected to an air suction pipe (35). One end of the air suction pipe (35) away from the third three-way electromagnetic valve (34) is respectively connected to the first regenerative box (3) and the second regenerative box (4). On the outer sides of both the first regenerative box (3) and the second regenerative box (4), there are through holes opened and an air inlet pipe (36) is fixedly connected. The air inlet pipe (36) is located at the bottom of one end of the first regenerative box (3), and the air suction pipe (35) is at the top of the other end of the first regenerative box (3).

Images