Rotary hearth furnace capable of preventing furnace burden from hardening
By setting up a heating zone, a vibrating cloth device, a spiral discharger, a cloth chute, a material control assembly and a material turnover assembly in the rotary bottom furnace, the problem of the material collection layer caused by the uneven distribution of the furnace material is solved, the uniform distribution of the furnace material and scraping at high temperature is achieved, the furnace shutdown and cooling is reduced, and the normal use rate of the equipment is improved.
Patent Information
- Application Number
- CN202420413712.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-05
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-03-05
AI Technical Summary
In the rotary bottom furnace, the uneven distribution of the furnace material leads to uneven wear of the blades of the spiral discharger, forming a material collection layer, affecting the normal use of the rotary bottom furnace.
By setting up a heating zone, a vibrating cloth device, a spiral discharger, a cloth chute, a material control assembly and a material turning assembly on the bottom of the furnace, the uniform distribution of the furnace material and scraping at high temperatures can be achieved, reducing the formation of the material collection layer.
It effectively prevents the furnace sheet from being tied, reduces the situation of the rotary bottom furnace shutdown and cools down, and improves the normal use rate of the equipment.
Smart Images
Figure CN222544373U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rotary hearth furnaces, in particular to a rotary hearth furnace capable of preventing furnace charge from caking. Background Art
[0002] In order to recover iron oxides contained in iron and steel waste, iron and steel waste is mixed with a reducing agent and a binder, and pellets are obtained by charging the pellets into a rotary hearth furnace and heating and reducing the pellets.
[0003] A common rotary hearth furnace includes an annular furnace chamber, on which a feed port and a discharge port are provided, a furnace bottom is arranged in a rotating manner in the annular furnace chamber, a vibrating distributor and a spiral discharger are installed above the furnace bottom, the input end of the vibrating distributor is connected to the feed port, and the output end of the spiral discharger is connected to the discharge port. The charge is arranged on the furnace bottom through the vibrating distributor, and the rotation of the furnace bottom drives the charge to move. The charge is heated and reduced during the movement, and finally the spiral discharger discharges the charge on the furnace bottom out of the annular furnace chamber.
[0004] During the use of the rotary hearth furnace, the blades of the spiral discharger will be worn by the charge, but the uneven distribution of charge on the furnace bottom will cause uneven wear of the blades of the spiral discharger. When the wear of some parts of the blades on the spiral discharger is serious, the charge at the corresponding position on the furnace bottom cannot be effectively discharged, which will cause the charge to accumulate on the furnace bottom. The accumulated charge is repeatedly roasted at high temperature to form a material layer. The material layer will aggravate the wear of the spiral discharger blades and cause the spiral discharger to malfunction. Therefore, when the material layer is formed on the furnace bottom, the rotary hearth furnace needs to be stopped for cooling, and then the workers will break and remove the material layer on the furnace bottom, affecting the normal use of the rotary hearth furnace. Utility Model Content
[0005] In order to prevent the bottom plate of a rotary hearth furnace from being easily caking with material and reduce the situation where the rotary hearth furnace is shut down for cooling, the present application provides a rotary hearth furnace that prevents the material from being caking with material.
[0006] The present application provides a rotary hearth furnace for preventing charge from caking, which adopts the following technical solution:
[0007] A rotary hearth furnace for preventing furnace charge from compacting comprises an annular furnace chamber, a furnace bottom is rotatably arranged in the annular furnace chamber, a plurality of heating zones are arranged on the furnace bottom, a vibrating distributor and a spiral discharger are installed above the furnace bottom, a plurality of distribution chutes are connected and arranged on the output end of the vibrating distributor, the distribution chutes are arranged above the furnace bottom, a material control component is arranged on the distribution chute, the material control component is used to adjust the material flow on the distribution chute, a material turning component is arranged above the heating zone, the material turning component is used to scrape the furnace charge on the furnace bottom.
[0008] By adopting the above technical solution, the vibrating distributor distributes the charge on the distribution chute, and the charge is discharged to the furnace bottom along the distribution chute. In the process of the charge being discharged along the distribution chute, the control component adjusts the flow of the charge on the distribution chute, so that the charge amount on the same horizontal line of different distribution chutes is uniform, thereby making the charge on different distribution chutes entering the furnace bottom at the same time evenly distributed. When the charge moves from the distribution chute to the furnace bottom, the rotating furnace bottom drives the charge to move. When the charge moves to the heating zone, the charge softens due to the high temperature. The charge turning assembly scrapes the softened charge to reduce the situation where the charge is slabbed on the furnace bottom. Therefore, on the one hand, the charge is evenly distributed through the charge control assembly to reduce the degree of wear on some parts of the spiral discharger blades, so that the charge is not easy to accumulate and form a material layer on the furnace bottom. On the other hand, the charge on the furnace bottom is scraped by the charge turning assembly to reduce the situation where the charge is repeatedly roasted at high temperature to form a material layer, thereby achieving the effect of making it difficult for the bottom plate of the rotary hearth furnace to form a material, and reducing the situation of the rotary hearth furnace being shut down for cooling.
[0009] Preferably, one end of the distribution chute is a feed end, which is interconnected with the output end of the vibrating distributor, and the other end of the distribution chute is a discharge end, which is located on the side of the vibrating distributor away from the spiral discharge machine.
[0010] By adopting the above technical scheme, the output end of the vibrating distributor sends the charge into the distribution chute from the feeding end of the distribution chute, the charge in the distribution chute moves along the distribution chute, and moves to the furnace bottom from the discharge end of the distribution chute, and the distribution chute sends the charge to the side of the vibrating distributor away from the spiral discharger, so that the charge is fully heated and reduced under the drive of the furnace bottom, and then discharged from the annular furnace through the spiral discharger.
[0011] Preferably, the discharge end is located obliquely below the feed end, and adjacent discharge ends are in contact with each other.
[0012] By adopting the above technical solution, since the discharge end is located obliquely below the feed end, the charge in the distribution chute slides from the feed end to the discharge end under the action of gravity, and the discharge ends fit each other, so that the charge removed from the distribution chute is continuously distributed.
[0013] Preferably, the material control assembly includes a material control motor and a material control plate. The material control motor is fixedly arranged on one side of the material distribution chute. The output shaft of the material control motor passes through the side wall of the material distribution chute. The output shaft of the material control motor is fixedly connected to the material control plate. The material control plate is rotatably connected to the material distribution chute away from the side of the material distribution motor.
[0014] By adopting the above technical solution, the material control motor drives the material control plate to rotate, and the material control plate rotates to adjust the gap between the bottom of the material control plate and the material distribution chute, thereby adjusting the amount of furnace charge.
[0015] Preferably, a crossbeam is fixedly arranged in the annular furnace, and a plurality of radars are fixedly arranged at the bottom of the crossbeam. The radars are located above the discharge end, and the radars correspond one-to-one to the distribution chute. The radars are used to detect the height of the charge.
[0016] By adopting the above technical solution, when the charge moves along the distribution chute to the discharge end, the radar detects the charge height at the discharge end. When the radar detects that the charge height at the discharge end exceeds the maximum value, the gap between the distribution chute corresponding to the radar and the charge control plate is narrowed. When the radar detects that the charge height at the discharge end is lower than the minimum value, the gap between the distribution chute corresponding to the radar and the charge control plate is expanded.
[0017] Preferably, the flipping assembly includes a flipping shaft and a flipping plate, the flipping shaft is fixedly arranged on the annular furnace, the flipping plate is detachably connected to the flipping shaft, the bottom of the flipping plate is fitted with the top of the furnace bottom, the top wall of the flipping plate is inclined, and one side of the top wall of the flipping plate is connected to the top wall of the furnace bottom.
[0018] By adopting the above technical solution, when the furnace bottom drives the charge to move to contact with the turning plate, the turning plate scrapes the charge on the furnace bottom to separate the charge from the furnace bottom, thereby reducing the situation where the charge sticks to the furnace bottom.
[0019] Preferably, a slot is provided at the bottom of the flipping plate, the slot runs through both ends of the flipping plate, and the flipping shaft is inserted into the slot.
[0020] By adopting the above technical solution, when the flipping plate is severely worn, the flipping plate is moved upward to move the flipping shaft out of the slot, and then the flipping plate is separated from the flipping shaft, and then the new flipping plate is connected to the flipping shaft through the slot to realize the replacement of the flipping plate.
[0021] Preferably, a bracket is fixedly arranged in the annular furnace, the bracket is located between the vibrating distributor and the spiral discharger, and a plurality of shock wave sweepers are fixedly arranged at the bottom of the bracket.
[0022] By adopting the above technical solution, when the charge is processed by the spiral discharger, there is still some charge that cannot be discharged from the annular furnace. The shock wave sweeper will impact and break up this part of the charge, so that the charge that has not been discharged from the annular furnace is not easily compacted on the furnace bottom.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] 1. By setting up an annular furnace, furnace bottom, heating zone, vibrating distributor, spiral discharging machine, distribution chute, material control assembly and material turning assembly, the effect of preventing the bottom plate of the rotary hearth furnace from accumulating materials is achieved, and the situation of stopping the rotary hearth furnace for cooling is reduced;
[0025] 2. By setting the material control motor and material control plate, the material flow on the material distribution chute is adjusted to make the material on the furnace bottom evenly distributed;
[0026] 3. By setting up the turning shaft and turning plate, the charge on the furnace bottom can be scraped to reduce the situation where the charge sticks to the furnace bottom. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of a rotary hearth furnace for preventing furnace charge from compacting in an embodiment of the present application.
[0028] Figure 2 yes Figure 1 Enlarged view of part A.
[0029] Figure 3 It is a cross-sectional view showing the connection relationship between the material distribution chute and the flow control plate in the embodiment of the present application.
[0030] Figure 4 It is a cross-sectional view showing the connection relationship between the radar and the annular furnace in the embodiment of the present application.
[0031] Figure 5 It is a schematic diagram showing the connection relationship between the turning shaft and the turning plate in the embodiment of the present application.
[0032] Figure 6 It is a cross-sectional view showing the connection relationship between the shock wave sweeper and the annular furnace in the embodiment of the present application.
[0033] Explanation of the reference numerals in the accompanying drawings: 1. annular furnace; 11. vibrating distributor; 12. spiral discharger; 2. furnace bottom; 21. heating zone; 3. distribution chute; 31. feed end; 32. discharge end; 4. material control assembly; 41. material control motor; 42. material control plate; 5. material turning assembly; 51. material turning shaft; 52. material turning plate; 521. slot; 6. radar; 61. crossbeam; 7. shock wave sweeper; 71. bracket. DETAILED DESCRIPTION
[0034] The following is combined with Figure 1-6 This application is described in further detail.
[0035] The present application embodiment discloses a rotary hearth furnace for preventing furnace charge from hardening. Figure 1 and 2, which comprises an annular furnace 1, in which a furnace bottom 2 is installed, the furnace bottom 2 is rotatably connected to the annular furnace 1, and the furnace bottom 2 rotates clockwise. A vibrating distributor 11 and a spiral discharger 12 are sequentially installed above the furnace bottom 2 along the rotation direction of the furnace bottom 2, and the vibrating distributor 11 distributes the charge to the furnace bottom 2, and the spiral discharger 12 discharges the charge on the furnace bottom 2 out of the annular furnace 1. The charge moves from the output end of the vibrating distributor 11 to the input end of the spiral discharger 12, and the charge moves in a clockwise direction. A plurality of distribution chutes 3 are installed on the output end of the vibrating distributor 11 along the charge moving direction, one end of the distribution chute 3 is interconnected with the output end of the vibrating distributor 11, and the other end of the distribution chute 3 is located on the side of the vibrating distributor 11 away from the spiral discharger 12, and the distribution chute 3 is located above the furnace bottom 2. A material control component 4 is installed on the distribution chute 3, and the material control component 4 is used to adjust the material flow on the distribution chute 3. A plurality of heating zones 21 are arranged on the furnace bottom 2, and a material turning assembly 5 is installed above the heating zones 21. The material turning assembly 5 is used to scrape the charge on the furnace bottom 2. The vibrating distributor 11 distributes the charge on the distribution chute 3, and the charge is discharged to the furnace bottom 2 along the distribution chute 3. In the process of the charge being discharged along the distribution chute 3, the material control assembly 4 adjusts the material flow on the distribution chute 3 so that the amount of charge in different distribution chutes 3 on the same horizontal line is uniform. Then, at the same time, the charge entering the furnace bottom 2 from different distribution chutes 3 is evenly distributed. When the charge moves from the distribution chute 3 to the furnace bottom 2, the rotating furnace bottom 2 drives the charge to move. When the charge moves to the heating zone 21, the charge softens due to the high temperature, and the material turning assembly 5 scrapes the softened charge to reduce the situation where the charge is calcified on the furnace bottom 2. In the charge distribution stage, the charge control component 4 evenly distributes the charge on the furnace bottom 2, so that the charge is in uniform contact with the spiral discharger 12, reducing the situation where the blades of the spiral discharger 12 are worn to a greater extent, thereby reducing the situation where the charge corresponding to the position where the blades are severely worn is difficult to discharge, resulting in the accumulation of charge on the furnace bottom 2 to form a material layer. In the charge heating and reduction stage, the turning component 5 scrapes the charge on the furnace bottom 2 to loosen the softened charge from the furnace bottom 2, reducing the situation where the charge is repeatedly roasted at high temperature to form a material layer. Therefore, by coordinating the uniform distribution of the charge and the scraping of the charge, the effect of making the bottom 2 of the rotary furnace not easy to form a material is achieved, and the situation of stopping the rotary furnace to cool down is reduced.
[0036] In order to move the charge in the vibrating distributor 11 along the distribution chute 3 to the furnace bottom 2, refer to Figures 1 to 3, one end of the distribution chute 3 is the feed end 31, and the other end of the distribution chute 3 is the discharge end 32, and the direction from the feed end 31 to the discharge end 32 is the moving direction of the furnace charge. The feed end 31 is connected to the output end of the vibrating distributor 11, and the discharge end 32 is located on the side of the vibrating distributor 11 away from the spiral discharge machine 12. The discharge end 32 is located obliquely below the feed end 31, and adjacent discharge ends 32 fit together. The output end of the vibrating distributor 11 feeds the furnace charge from the feed end 31 of the distribution chute 3 into the distribution chute 3, and the furnace charge in the distribution chute 3 slides from the feed end 31 to the discharge end 32 under the action of gravity, and moves from the discharge end 32 of the distribution chute 3 to the furnace bottom 2. And the discharge ends 32 fit together, so that the furnace charge removed from the distribution chute 3 is continuously distributed. After the charge is moved from the distribution chute 3 to the furnace bottom 2, the furnace bottom 2 drives the charge to move clockwise and is fully heated and reduced. Finally, the charge moves to the spiral discharger 12 and is discharged from the annular furnace 1.
[0037] To adjust the material flow on the distribution chute 3, refer to Figures 1 to 4 The material control assembly 4 includes a material control motor 41 and a material control plate 42. The material control motor 41 is installed on the material distribution chute 3, and the output shaft of the material control motor 41 passes through the side wall of the material distribution chute 3. The output shaft of the material control motor 41 is welded to one side of the material control plate 42, and the other side of the material control plate 42 is rotatably connected to the side wall of the material distribution chute 3. A crossbeam 61 is installed in the annular furnace 1, and the crossbeam 61 is arranged along the diameter direction of the furnace bottom 2. A plurality of radars 6 are installed at the bottom of the crossbeam 61. The radar 6 is located above the discharge end 32, and the radar 6 corresponds to the material distribution chute 3 one by one. The radar 6 is used to detect the height of the charge, and the radar 6 and the material control motor 41 are both connected to the control system. When the charge moves along the material distribution chute 3 to the discharge end 32, the radar 6 detects the height of the charge at the discharge end 32. When the radar 6 detects that the charge height at the discharge end 32 exceeds the highest value, the radar 6 gives feedback to the controller, and the controller activates the output shaft of the charge control motor 41, which drives the charge control plate 42 to rotate, thereby reducing the gap between the charge distribution chute 3 corresponding to the radar 6 and the charge control plate 42. When the radar 6 detects that the charge height at the discharge end 32 is lower than the lowest value, the radar 6 gives feedback to the controller, and the controller activates the output shaft of the charge control motor 41, which drives the charge control plate 42 to rotate, thereby increasing the gap between the charge distribution chute 3 corresponding to the radar 6 and the charge control plate 42.
[0038] In order to scrape the charge on the furnace bottom 2, refer to Figures 1 to 5The turning assembly 5 includes a turning shaft 51 and a turning plate 52, and both the turning shaft 51 and the turning plate 52 are arranged along the diameter direction of the furnace bottom 2. The turning plate 52 is wedge-shaped, that is, the top wall of the turning plate 52 is inclined. The top wall of the turning plate 52 facing the incoming material direction is connected to the top wall of the furnace bottom 2, and there is a height difference between the top wall of the turning plate 52 facing the material removal direction and the top wall of the furnace bottom 2, and the bottom of the turning plate 52 is in contact with the top of the furnace bottom 2. A slot 521 is provided at the bottom of the turning plate 52, and the slot 521 runs through both ends of the turning plate 52. The turning shaft 51 is inserted into the slot 521, and the end wall of the turning shaft 51 is welded to the inner wall of the annular furnace 1. When the furnace bottom 2 drives the charge to move to contact with the turning plate 52, the turning plate 52 scrapes the charge on the furnace bottom 2. The charge is separated from the furnace bottom 2, and the situation that the charge is adhered to the furnace bottom 2 is reduced. When the flipping plate 52 is severely worn, the flipping plate 52 is moved upward to remove the flipping shaft 51 from the slot 521, and then the flipping plate 52 is separated from the flipping shaft 51, and then a new flipping plate 52 is connected to the flipping shaft 51 through the slot 521 to replace the flipping plate 52.
[0039] In order to prevent the charge that has not been discharged from the annular furnace 1 from being easily agglomerated on the furnace bottom 2, refer to Figure 1 and Figure 6 A bracket 71 is installed in the annular furnace 1, and the bracket 71 is located between the vibrating distributor 11 and the spiral discharging machine 12. A plurality of shock wave sweepers 7 are fixedly arranged at the bottom of the bracket 71. Along the moving direction of the charge, the charge passes through the spiral discharging machine 12, the bracket 71 and the vibrating distributor 11 in sequence. When the charge is processed by the spiral discharging machine 12, there is still a part of the charge that cannot be discharged from the annular furnace 1, and the shock wave sweeper 7 impacts and scatters this part of the charge, so that the charge that has not been discharged from the annular furnace 1 is not easy to be hardened on the furnace bottom 2.
[0040] The implementation principle of a rotary hearth furnace for preventing the charge from being compacted in the embodiment of the present application is as follows: the vibrating distributor 11 distributes the charge on the distribution chute 3, and the charge is discharged along the distribution chute 3 to the furnace bottom 2. In the process of the charge being discharged along the distribution chute 3, the material control component 4 adjusts the material flow on the distribution chute 3 so that the amount of charge in different distribution chutes 3 on the same horizontal line is uniform. Then, at the same time, the charge entering the furnace bottom 2 from different distribution chutes 3 is evenly distributed. When the charge moves from the distribution chute 3 to the furnace bottom 2, the rotating furnace bottom 2 drives the charge to move. When the charge moves to the heating zone 21, the charge softens due to the high temperature, and the material turning component 5 scrapes the softened charge to reduce the situation where the charge is compacted on the furnace bottom 2. In the charge distribution stage, the charge control component 4 evenly distributes the charge on the furnace bottom 2, so that the charge is in uniform contact with the spiral discharger 12, reducing the situation where the blades of the spiral discharger 12 are worn to a greater extent, thereby reducing the situation where the charge corresponding to the position where the blades are severely worn is difficult to discharge, resulting in the accumulation of charge on the furnace bottom 2 to form a material layer. In the charge heating and reduction stage, the turning component 5 scrapes the charge on the furnace bottom 2 to loosen the softened charge from the furnace bottom 2, reducing the situation where the charge is repeatedly roasted at high temperature to form a material layer. Therefore, by coordinating the uniform distribution of the charge and the scraping of the charge, the effect of making the bottom 2 of the rotary furnace not easy to form a material is achieved, and the situation of stopping the rotary furnace to cool down is reduced.
[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A rotary hearth furnace for preventing furnace charge from hardening, comprising an annular furnace chamber (1), a furnace bottom (2) rotatably arranged in the annular furnace chamber (1), a plurality of heating zones (21) arranged on the furnace bottom (2), a vibrating distributor (11) and a spiral discharger (12) installed above the furnace bottom (2), characterized in that: A plurality of distribution chutes (3) are connected to the output end of the vibrating distribution device (11), and the distribution chutes (3) are arranged above the furnace bottom (2). A material control component (4) is arranged on the distribution chute (3), and the material control component (4) is used to adjust the material flow on the distribution chute (3). A material turning component (5) is arranged above the heating zone (21), and the material turning component (5) is used to scrape the furnace charge on the furnace bottom (2).
2. A rotary hearth furnace for preventing charge material from caking according to claim 1, characterized in that: One end of the distribution chute (3) is a feed end (31), and the feed end (31) is connected to the output end of the vibrating distributor (11). The other end of the distribution chute (3) is a discharge end (32), and the discharge end (32) is located on the side of the vibrating distributor (11) away from the spiral discharge machine (12).
3. A rotary hearth furnace for preventing charge material from caking according to claim 2, characterized in that: The discharge end (32) is located obliquely below the feed end (31), and adjacent discharge ends (32) are in contact with each other.
4. A rotary hearth furnace for preventing charge material from caking according to claim 3, characterized in that: The material control assembly (4) comprises a material control motor (41) and a material control plate (42); the material control motor (41) is fixedly arranged on one side of the material distribution chute (3); the output shaft of the material control motor (41) passes through the side wall of the material distribution chute (3); the output shaft of the material control motor (41) is fixedly connected to the material control plate (42); and the side of the material control plate (42) away from the material distribution motor is rotatably connected to the material distribution chute (3).
5. A rotary hearth furnace for preventing charge material from caking according to claim 4, characterized in that: A crossbeam (61) is fixedly arranged in the annular furnace (1), and a plurality of radars (6) are fixedly arranged at the bottom of the crossbeam (61). The radars (6) are located above the discharge end (32), and the radars (6) correspond one-to-one to the material distribution chute (3). The radars (6) are used to detect the height of the furnace charge.
6. A rotary hearth furnace for preventing charge material from caking according to claim 1, characterized in that: The material turning assembly (5) comprises a material turning shaft (51) and a material turning plate (52); the material turning shaft (51) is fixedly arranged on the annular furnace (1); the material turning plate (52) is detachably connected to the material turning shaft (51); the bottom of the material turning plate (52) is in contact with the top of the furnace bottom (2); the top wall of the material turning plate (52) is inclined; and one side of the top wall of the material turning plate (52) is connected to the top wall of the furnace bottom (2).
7. A rotary hearth furnace for preventing charge material from caking according to claim 6, characterized in that: A slot (521) is provided at the bottom of the turning plate (52), and the slot (521) runs through both ends of the turning plate (52), and the turning shaft (51) is inserted into the slot (521).
8. A rotary hearth furnace for preventing charge material from caking according to claim 1, characterized in that: A bracket (71) is fixedly arranged in the annular furnace (1), the bracket (71) is located between the vibrating distributor (11) and the spiral discharger (12), and a plurality of shock wave sweepers (7) are fixedly arranged at the bottom of the bracket (71).