Intermediate frequency heating furnace for preheating aluminum electrolysis anode

Abstract

The application belongs to the technical field of intermediate frequency heating furnace, in particular to an intermediate frequency heating furnace for preheating electrolytic aluminum anode, which comprises a heating furnace body for heating anode rods, an electromagnetic coil arranged inside the heating furnace body, an air inlet pipe fixedly connected to one end of the electromagnetic coil, an air outlet pipe fixedly connected to the other end of the electromagnetic coil, a fan arranged on one side of the heating furnace body, an air outlet end of the fan in communication with the air inlet pipe, a second water tank arranged on one side of the heating furnace body, a heat treatment tank fixedly installed on the side wall of the second water tank, a thermoelectric converter arranged inside the heat treatment tank, the air outlet pipe extending through the second water tank to the inside of the heat treatment tank at an end away from the heating furnace body, the air outlet opening facing the heat absorbing end of the thermoelectric converter, and an electromagnetic generator arranged at the top end of the heat treatment tank, with a transmission rod fixedly connected to the rotor of the electromagnetic generator, so that the waste heat source can be effectively converted into electric energy, the energy utilization efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of medium frequency heating furnaces, in particular to a medium frequency heating furnace for preheating electrolytic aluminum anodes. Background Art

[0002] The medium-frequency heating furnace is a key equipment used to preheat electrolytic aluminum anodes. It is mainly used to increase the initial temperature of the anode and ensure that it maintains a stable thermal state during the electrolysis process, thereby improving the electrolysis efficiency and the service life of the anode. The equipment converts electrical energy into thermal energy through the medium-frequency electromagnetic induction heating principle to heat the anode quickly and evenly. Compared with traditional heating methods, the medium-frequency heating furnace has the advantages of fast heating speed, precise temperature control and low energy consumption.

[0003] For example, the published patent: CN207231251U is a medium-frequency heating furnace for preheating electrolytic aluminum anodes. By placing the anode carbon blocks in a heating box composed of electromagnetic induction coils, the anode carbon blocks are preheated by induction heating, which reduces the impact of pole change on the anode carbon blocks and the electrolytic cell and reduces energy consumption. The induction heating has a fast heating speed and high efficiency, which can match the demand for anode carbon blocks in the electrolysis process. At the same time, a cooling device is provided to cool the electromagnetic induction coil to prevent the electromagnetic induction coil from overheating and affecting production.

[0004] However, in the above patent, the medium frequency heating furnace generates a large amount of high-temperature waste heat during operation. This waste heat is usually discharged into the environment through a cooling system or directly, and cannot be effectively recycled. The direct discharge of this waste heat not only causes energy waste, but also significantly reduces the overall energy utilization efficiency and increases production costs.

[0005] To this end, the present invention provides a medium frequency heating furnace for preheating electrolytic aluminum anodes. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: the medium frequency heating furnace for preheating electrolytic aluminum anodes of the present invention

[0008] The beneficial effects of the present invention are as follows:

[0009] 1. The medium-frequency heating furnace for preheating electrolytic aluminum anodes described in the present invention starts the fan, and the air pipe transports gas to the inside of the first water tank, and can filter dust in the external air through the water body. Then the gas will pass through the water body and accumulate in the upper part of the first water tank. Under the action of air pressure, the gas will pass through the air inlet pipe and the electromagnetic coil, and finally be discharged through the air outlet pipe. The hot air flow blows on the heat absorption end of the thermoelectric converter, converting thermal energy into electrical energy. The converted electrical energy can be utilized, thereby improving energy utilization efficiency and reducing production costs.

[0010] 2. The medium-frequency heating furnace for preheating electrolytic aluminum anodes described in the present invention absorbs hot air flow through the air outlet pipe and transfers heat to the inside of the second water tank, which can heat the water in the second water tank. As the temperature in the second water tank continues to rise, water vapor can be produced. When the water vapor enters the interior of the air receiving box, the air receiving box and the transmission box can be used to control the push rod to slide back and forth, and the waist-shaped guide block can be controlled to slide left and right on the positioning frame. The guide rod is used to rotate the rotating disk, so that the electromagnetic generator generates electricity, effectively recycling the waste heat source. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] Figure 1 It is a stereogram of the present invention;

[0013] Figure 2 It is a structural schematic diagram of the air inlet pipe in the present invention;

[0014] Figure 3 It is a structural schematic diagram of the heat treatment box in the present invention;

[0015] Figure 4 In the present invention Figure 3 A magnified view of point A in the figure;

[0016] Figure 5 In the present invention Figure 3 Enlarged view of point B in FIG.

[0017] Figure 6 It is a structural schematic diagram of the air outlet duct in the present invention;

[0018] Figure 7 In the present invention Figure 6 Enlarged view of point C in the figure.

[0019] In the figure: 1. Heating furnace body; 2. Anode rod; 3. First water tank; 4. Fan; 5. Air inlet pipe; 6. Air outlet pipe; 7. Second water tank; 8. Heat treatment box; 9. Electromagnetic generator; 10. Air guide frame; 11. Exhaust port; 12. Transmission box; 13. First air hole; 14. Second air hole; 15. Third air hole; 16. Fourth air hole; 17. Piston; 18. Push rod; 19. Push block; 20. Push rod; 21. First rotating rod; 22. Second rotating rod; 23. Mounting plate; 24. Positioning frame; 25. Waist-shaped guide block; 26. Rotating disk; 27. Guide rod; 28. Reciprocating thread groove; 29. ​​Sliding block; 30. Pull rope; 31. Filter screen; 32. Scraper; 33. Thermoelectric converter; 34. Air receiving box. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] like Figures 1 to 7 As shown, a medium frequency heating furnace for preheating electrolytic aluminum anodes described in an embodiment of the present invention includes a heating furnace body 1 for heating the anode rod 2. An electromagnetic coil is arranged inside the heating furnace body 1, which is the same as the electromagnetic coil proposed in the medium frequency heating furnace for preheating electrolytic aluminum anodes disclosed in Publication No.: CN207231251U, and both are hollow.

[0022] One end of the electromagnetic coil is fixedly connected to the air inlet pipe 5, and the other end of the electromagnetic coil is fixedly connected to the air outlet pipe 6. A fan 4 is provided on one side of the heating furnace body 1, and the air outlet end of the fan 4 is connected to the air inlet pipe 5;

[0023] By starting the fan 4, the air flow can be delivered to the electromagnetic coil through the air inlet pipe 5 and finally discharged from the air outlet pipe 6, which can complete the heat dissipation of the electromagnetic coil and reduce the problem of the electromagnetic coil overheating affecting production.

[0024] The air inlet pipe 5 and the air outlet pipe 6 are preferably copper pipes.

[0025] A second water tank 7 is provided on one side of the heating furnace body 1. A heat treatment box 8 is fixedly mounted on the side wall of the second water tank 7. A thermoelectric converter 33 is provided inside the heat treatment box 8. An end of the air outlet pipe 6, away from the heating furnace body 1, passes through the second water tank 7 and extends into the interior of the heat treatment box 8, with the air outlet facing the heat absorbing end of the thermoelectric converter 33.

[0026] The electromagnetic coil is cooled by the fan 4, and the air outlet duct 6 brings out the heat energy inside the heating furnace body 1. In the process of moving in the air outlet duct 6, the air outlet duct 6 absorbs the heat in the air flow and transfers the heat to the inside of the second water tank 7. At this time, the water in the second water tank 7 can be heated. As the temperature in the second water tank 7 continues to rise, water vapor can be produced. At the same time, the hot air flow discharged from the air outlet duct 6 blows on the heat absorption end of the thermoelectric converter 33, converting the heat energy into electrical energy. The converted electrical energy can be utilized, effectively utilizing the waste resources.

[0027] An electromagnetic generator 9 is provided at the top of the heat treatment box 8. The rotor of the electromagnetic generator 9 is fixedly connected to a transmission rod, and the other end of the transmission rod is fixedly connected to a rotating disk 26. A control component for driving the rotating disk 26 to rotate is provided at the top of the heat treatment box 8.

[0028] The rotation of the rotating disk 26 is controlled by the control component. At this time, the transmission rod will drive the rotor of the electromagnetic generator 9 to rotate. The wire cuts the magnetic lines of force. According to the principle of electromagnetic induction, an induced current will be generated in the wire, causing the electromagnetic generator 9 to generate electricity, effectively converting the kinetic energy of the rotating disk 26 into electrical energy for utilization.

[0029] like Figure 2 As shown, a first water tank 3 is provided on one side of the heating furnace body 1, the air outlet end of the fan 4 extends to below the liquid level of the first water tank 3 through the air pipe, and one end of the air inlet pipe 5 extends to the inside of the first water tank 3, and the air inlet pipe 5 is located above the liquid level.

[0030] When the fan 4 is started, the gas is transported to the inside of the first water tank 3 through the air pipe, and the dust in the external air can be filtered through the water. Then the gas will pass through the water and accumulate in the upper part of the first water tank 3. Under the action of air pressure, the gas will pass through the air inlet pipe 5 and the electromagnetic coil, and finally be discharged through the air outlet pipe 6.

[0031] like Figure 5 As shown, the control component includes a positioning frame 24, a waist-shaped guide block 25 and a guide rod 27. The positioning frame 24 is fixedly mounted on the top of the heat treatment box 8, the waist-shaped guide block 25 is slidably mounted on the positioning frame 24, and the guide rod 27 is fixedly mounted on the side of the rotating disk 26 close to the waist-shaped guide block 25. One end of the guide rod 27 extends to the interior of the waist-shaped guide block 25.

[0032] A vertical waist-shaped groove is provided on the waist-shaped guide block 25, and a guide rod 27 is located inside the waist-shaped groove. When the waist-shaped guide block 25 slides left and right on the positioning frame 24, the guide rod 27 will be driven to slide in the waist-shaped groove, thereby driving the rotating disk 26 to rotate.

[0033] like Figure 4As shown, an air receiving box 34 connected to the inner cavity of the second water tank 7 is fixedly installed on the top of the second water tank 7, and an air guide frame 10 is slidably installed inside the air receiving box 34. The side wall of the air guide frame 10 is fixedly connected to a push rod 20, and the other end of the push rod 20 is fixedly connected to the waist-shaped guide block 25.

[0034] The transmission box 12 is fixedly installed on the top of the air receiving box 34, and the bottom of the transmission box 12 is provided with a first air hole 13 and a second air hole 14. The top of the air receiving box 34 is provided with a third air hole 15 and a fourth air hole 16. The first air hole 13 corresponds to the third air hole 15, and the fourth air hole 16 corresponds to the second air hole 14.

[0035] A mounting plate 23 is fixedly installed on the top of the second water tank 7, and a first rotating rod 21 and a second rotating rod 22 are rotatably installed on the mounting plate 23. One end of the first rotating rod 21 and the second rotating rod 22 are rotatably connected to the push rod 20. A piston 17 is slidably installed inside the transmission box 12, and the other end of the piston 17 is fixedly connected to a push rod 18. The other end of the push rod 18 extends out of the outer wall of the transmission box 12 and is fixedly installed with a push block 19. The push block 19 is located between the first rotating rod 21 and the second rotating rod 22.

[0036] An exhaust port 11 is provided inside the air receiving box 34 and is located inside the air guide frame 10 . Both ends of the air guide frame 10 fit in with the inside of the air receiving box 34 , and the top of the air guide frame 10 fits in with the top of the air receiving box 34 .

[0037] No matter the air guide frame 10 is located on the left or right side of the air receiving box 34 , the exhaust port 11 is always located inside the air guide frame 10 .

[0038] When the air guide frame 10 is located on the left side of the air receiving box 34, the first air hole 13 and the third air hole 15 will be connected to the exhaust port 11, so that the water vapor on the left side of the piston 17 can be discharged. At the same time, the water vapor entering the air receiving box 34 will also enter the interior of the transmission box 12 through the fourth air hole 16 and the second air hole 14, and accumulate on the right side of the piston 17.

[0039] When the air guide frame 10 is located on the right side of the air receiving box 34, the second air hole 14 and the fourth air hole 16 will be connected to the exhaust port 11. At this time, the water vapor on the right side of the piston 17 can be discharged through the exhaust port 11. The water vapor entering the air receiving box 34 will enter the interior of the transmission box 12 through the third air hole 15 and the first air hole 13, and accumulate on the left side of the piston 17.

[0040] When the air guide frame 10 is located on the left side of the air receiving box 34, the water vapor produced in the second water tank 7 will enter the interior of the air receiving box 34, and will enter the interior of the transmission box 12 through the third air hole 15 and the first air hole 13. As the water vapor increases, the piston 17 can be pushed to slide in the direction of the second air hole 14 inside the transmission box 12 (the sliding distance of the piston 17 is always between the first air hole 13 and the second air hole 14). At this time, the push rod 18 will drive the push block 19 to push one end of the second rotating rod 22, so that the second rotating rod 22 rotates clockwise and pushes the push rod 20 toward the direction of the first rotating rod 21. At this time, the air guide frame 10 will move toward the left side inside the air receiving box 34, so that the first air hole 13 and the third air hole 15 are connected to the exhaust port 11, and the water vapor on the left side of the piston 17 is discharged. At the same time, the water vapor entering the air receiving box 34 will pass through the fourth air hole 16 and The second air hole 14 enters the interior of the transmission box 12 and is located on the right side of the piston 17, pushing the piston 17 and the push rod 18 toward the left, so that the push block 19 pushes the first rotating rod 21, controlling the push rod 20 to move to the right, and repeating the above operation, the waste heat of the gas can be discharged through the air outlet pipe 6, so that the water vapor produced in the second water tank 7, and driving the push rod 20 to slide back and forth, so that the waist-shaped guide block 25 slides left and right on the positioning frame 24, and through the cooperation of the guide rod 27, the rotation of the rotating disk 26 is realized, so that the electromagnetic generator 9 can generate electricity, and the heat energy produced inside the heating furnace body 1 is blown to the heat absorption end of the thermoelectric converter 33 to convert the heat energy into electrical energy. At the same time, when the hot air flow passes through the air outlet pipe 6, the heat transfer causes the second water tank 7 to produce water vapor, and the water vapor drives the rotating disk 26 to rotate, so that the electromagnetic generator 9 generates electricity, effectively recycling the waste energy.

[0041] like Figures 6 and 7 As shown, a filter screen 31 is provided inside the heat treatment box 8 . The filter screen 31 is provided between the air outlet pipe 6 and the thermoelectric converter 33 . A scraper 32 is elastically mounted on the filter screen 31 .

[0042] The gas discharged from the air outlet pipe 6 is filtered by the filter 31, thereby reducing the dust at the heat absorption end of the thermoelectric converter 33 and improving the heat exchange efficiency. The scraper 32 is installed on one side of the filter 31 through a spring (the bottom surface of the scraper 32 and the inner bottom surface of the heat treatment box 8 can be connected by a spring to realize the up and down sliding of the scraper). The scraper 32 is in contact with the surface of the filter 31. When the scraper 32 slides on the filter 31, the filter 31 can be cleaned.

[0043] A reciprocating thread groove 28 is provided on the transmission rod, and a sliding block 29 is connected to the transmission rod through a thread. The bottom end of the sliding block 29 is fixedly connected to a pull rope 30, and the other end of the pull rope 30 is fixedly connected to a scraper 32.

[0044] When the rotating disk 26 is driven to rotate, the transmission rod can make the sliding block 29 slide back and forth on the outer wall of the transmission rod through the reciprocating thread groove 28. At the same time, with the cooperation of the pull rope 30 and the spring, the scraper 32 can slide back and forth on the surface of the filter screen 31.

[0045] Working principle: When the fan 4 is started, the gas is transported to the inside of the first water tank 3 through the air pipe, and the dust in the external air can be filtered through the water body. Then the gas will pass through the water body and accumulate in the upper part of the first water tank 3. Under the action of air pressure, the gas will pass through the air inlet pipe 5 and the electromagnetic coil, and finally be discharged through the air outlet pipe 6. The hot air flow blows on the heat absorption end of the thermoelectric converter 33, converting the heat energy into electrical energy. The converted electrical energy can be utilized, and the waste heat can be effectively utilized.

[0046] When the hot air flow passes through the air outlet pipe 6, the heat in the air flow will be transferred to the inside of the second water tank 7, which can heat the water in the second water tank 7. As the temperature in the second water tank 7 continues to rise, water vapor can be produced. When the water vapor enters the interior of the air receiving box 34, it first enters the interior of the transmission box 12 through the third air hole 15 and the first air hole 13, and pushes the piston 17 to slide in the direction of the second air hole 14 inside the transmission box 12. At this time, the push rod 18 will drive the push block 19 to push one end of the second rotating rod 22, so that the second rotating rod 22 rotates clockwise and pushes the push rod 20 toward the direction of the first rotating rod 21. The air guide frame 10 will move toward the left inside the air receiving box 34, so that the first air hole 13 and the third air hole 15 are connected to the exhaust port 11, and the water vapor on the left side of the piston 17 is discharged. At the same time, the water vapor entering the air receiving box 34 will pass through the fourth air hole 16 and the first air hole 17. The second air hole 14 enters the interior of the transmission box 12 and is located on the right side of the piston 17, pushing the piston 17 and the push rod 18 toward the left, so that the push block 19 pushes the first rotating rod 21, controlling the push rod 20 to move to the right, and repeating the above operation, the waste heat of the gas can be discharged through the air outlet pipe 6, so that the water vapor produced in the second water tank 7 is produced, and the push rod 20 is driven to slide back and forth, so that the waist-shaped guide block 25 slides left and right on the positioning frame 24, and through the cooperation of the guide rod 27, the rotation of the rotating disk 26 is realized, so that the electromagnetic generator 9 can generate electricity. By blowing the heat energy produced inside the heating furnace body 1 to the heat absorption end of the thermoelectric converter 33, the heat energy is converted into electrical energy. At the same time, when the hot air flow inside the air outlet pipe 6 passes through, the heat transfer causes the second water tank 7 to produce water vapor, and the water vapor drives the rotating disk 26 to rotate, so that the electromagnetic generator 9 generates electricity, effectively recycling the waste energy.

[0047] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0048] In the description of the application, it is to be understood that the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the application.

[0049] The basic principles, main features and advantages of the application are shown and described above. Those skilled in the art should understand that the application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the application. Without departing from the spirit and scope of the application, various changes and improvements can be made to the application, and these changes and improvements all fall within the scope of the application. The scope of protection of the application is defined by the appended claims and their equivalents.

Claims

1. A medium frequency heating furnace for preheating electrolytic aluminum anodes, comprising a heating furnace body (1) for heating an anode rod (2), wherein an electromagnetic coil is provided inside the heating furnace body (1); Its characteristics are: One end of the electromagnetic coil is fixedly connected to an air inlet pipe (5), and the other end of the electromagnetic coil is fixedly connected to an air outlet pipe (6). A fan (4) is provided on one side of the heating furnace body (1), and the air outlet end of the fan (4) is connected to the air inlet pipe (5). A second water tank (7) is provided on one side of the heating furnace body (1), a heat treatment box (8) is fixedly mounted on the side wall of the second water tank (7), a thermoelectric converter (33) is provided inside the heat treatment box (8), and an end of the air outlet pipe (6) away from the heating furnace body (1) passes through the second water tank (7) and extends to the inside of the heat treatment box (8), with the air outlet facing the heat absorption end of the thermoelectric converter (33); An electromagnetic generator (9) is provided at the top of the heat treatment box (8), a rotor of the electromagnetic generator (9) is fixedly connected to a transmission rod, the other end of the transmission rod is fixedly connected to a rotating disk (26), and a control component for driving the rotating disk (26) to rotate is provided at the top of the heat treatment box (8); A first water tank (3) is provided on one side of the heating furnace body (1); an air outlet end of the fan (4) extends to below the liquid level of the first water tank (3) through an air pipe; one end of the air inlet pipe (5) extends to the interior of the first water tank (3); and the air inlet pipe (5) is located above the liquid level; The control assembly includes a positioning frame (24), a waist-shaped guide block (25), and a guide rod (27); An air receiving box (34) communicating with the inner cavity of the second water tank (7) is fixedly mounted on the top of the second water tank (7); an air guide frame (10) is slidably mounted inside the air receiving box (34); a push rod (20) is fixedly connected to the side wall of the air guide frame (10); and the other end of the push rod (20) is fixedly connected to a waist-shaped guide block (25); A transmission box (12) is fixedly mounted on the top of the air receiving box (34); A piston (17) is slidably mounted inside the transmission box (12); A filter (31) is provided inside the heat treatment box (8), and the filter (31) is provided between the air outlet pipe (6) and the thermoelectric converter (33). A scraper (32) is elastically mounted on the filter (31); A reciprocating thread groove (28) is provided on the transmission rod, a sliding block (29) is connected to the transmission rod via a thread, a pull rope (30) is fixedly connected to the bottom end of the sliding block (29), and the other end of the pull rope (30) is fixedly connected to the scraper (32).

2. The medium frequency heating furnace for preheating electrolytic aluminum anodes according to claim 1, characterized in that: The positioning frame (24) is fixedly mounted on the top of the heat treatment box (8), the waist-shaped guide block (25) is slidably mounted on the positioning frame (24), the guide rod (27) is fixedly mounted on a side of the rotating disk (26) close to the waist-shaped guide block (25), and one end of the guide rod (27) extends to the interior of the waist-shaped guide block (25).

3. The medium frequency heating furnace for preheating electrolytic aluminum anodes according to claim 1, characterized in that: The bottom end of the transmission box (12) is provided with a first air hole (13) and a second air hole (14), and the top end of the air receiving box (34) is provided with a third air hole (15) and a fourth air hole (16), wherein the first air hole (13) corresponds to the third air hole (15), and the fourth air hole (16) corresponds to the second air hole (14).

4. A medium frequency heating furnace for preheating electrolytic aluminum anodes according to claim 3, characterized in that: A mounting plate (23) is fixedly mounted on the top of the second water tank (7), and a first rotating rod (21) and a second rotating rod (22) are rotatably mounted on the mounting plate (23). One end of each of the first rotating rod (21) and the second rotating rod (22) is rotatably connected to the push rod (20). The other end of the piston (17) is fixedly connected to a push rod (18). The other end of the push rod (18) extends out of the outer wall of the transmission box (12) and is fixedly mounted with a push block (19). The push block (19) is located between the first rotating rod (21) and the second rotating rod (22).

5. The medium frequency heating furnace for preheating electrolytic aluminum anodes according to claim 4, characterized in that: An exhaust port (11) is provided inside the air receiving box (34), and the exhaust port (11) is located inside the air guide frame (10). Both ends of the air guide frame (10) fit in with the inside of the air receiving box (34), and the top end of the air guide frame (10) fits in with the top end of the air receiving box (34).

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