Electromagnetic induction heating and drying device for drying particulate matters

Abstract

The utility model provides an electromagnetic induction heating and drying device for drying particulate matters, which relates to the technical field of drying and comprises an inner cylinder, an outer cylinder and an electromagnetic induction heating device. The rotating shaft is coaxially arranged in the inner cylinder, the rotating shaft and the inner cylinder rotate at a differential speed or the same speed, the rotating shaft is provided with heating plates arranged in the axial direction of the rotating shaft, and the multiple heating plates are spirally arranged on the rotating shaft; a plurality of groups of electromagnetic coils are arranged in the axial direction of the inner cylinder, each group of electromagnetic coils are arranged outside the inner cylinder in a central symmetry manner, the inner cylinder and the rotating shaft rotate, and stirring plates and heating plates on the inner cylinder continuously cut a magnetic field to generate heat so as to heat materials in the inner cylinder; materials accumulated in the inner cylinder are raised continuously, so that the materials in the inner cylinder are in a continuous rolling state, and uniform heating of the materials is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of drying, in particular to an electromagnetic induction heating drying device for drying particles. Background Art

[0002] As an important component of lithium-ion batteries, positive electrode materials determine the overall energy density and cost of lithium-ion batteries. High-nickel ternary positive electrode materials have the advantages of high energy density, high specific capacity, sufficient raw material resources, and low cost, and are considered to be ideal positive electrode materials for the next generation of high-energy-density lithium-ion batteries. However, the sintering temperature of high-nickel ternary positive electrode materials is low, so lithium hydroxide with a lower melting point and higher reaction activity needs to be used as a lithium salt; in addition, high-nickel ternary positive electrode materials are prone to lithium-nickel mixing. In order to reduce lithium-nickel mixing, excessive lithium hydroxide needs to be used, resulting in a large amount of lithium compounds (such as LiOH and Li2CO3) remaining on the surface of high-nickel ternary positive electrode materials after sintering. Therefore, a water washing process needs to be used in the preparation process of high-nickel ternary positive electrode materials, that is, the material to be treated is stirred in deionized water to remove residual lithium on the surface. Water washing can further improve the electrochemical performance of high-nickel ternary positive electrode materials. Therefore, in order to remove surface moisture in high-nickel ternary positive electrode materials after water washing, it is necessary to develop efficient drying technology and equipment to improve the drying efficiency of high-nickel ternary positive electrode materials.

[0003] Existing drying devices include vibration drying devices and rotary kilns. The vibration drying device uses bag filters and stainless steel frames, which are prone to blockage when drying ternary materials, reducing work efficiency. Rotary kilns usually use interlayer steam heating for drying, but because the materials will gather in a small area in the barrel due to gravity during rotation, the materials cannot be heated evenly and dried quickly. Utility Model Content

[0004] The utility model provides an electromagnetic induction heating drying device for drying granules, which aims to solve the problem that the existing rotary kiln cannot dry the materials evenly and fully due to accumulation.

[0005] In order to achieve the above-mentioned object, the embodiment of the utility model provides an electromagnetic induction heating drying device for drying particulate matter, comprising:

[0006] The inner wall of the inner cylinder is provided with a stirring plate arranged along the axial direction of the inner cylinder;

[0007] A rotating shaft is coaxially arranged in the inner cylinder, the rotating shaft and the inner cylinder rotate at a differential speed or at the same speed, a heating plate is arranged along the axial direction of the rotating shaft on the rotating shaft, and a plurality of the heating plates are spirally arranged on the rotating shaft;

[0008] Several groups of electromagnetic induction coils are arranged along the axial direction of the inner cylinder, and each group of electromagnetic induction coils is arranged outside the inner cylinder in a centrally symmetrical manner.

[0009] Preferably, the electromagnetic induction heating drying device for drying particulate matter further comprises an outer cylinder coaxially arranged with the inner cylinder, a cavity is formed between the outer cylinder and the inner cylinder, and the electromagnetic induction coil is arranged in the cavity and fixed on the outer cylinder;

[0010] The two ends of the outer cylinder are also provided with outer end plates respectively, and the two outer end plates are fixedly connected to the two ends of the outer cylinder respectively;

[0011] Inner end plates are respectively arranged at both ends of the inner cylinder, and the two inner end plates are respectively fixedly connected to the inner cylinder, and the two ends of the rotating shaft are respectively penetrated through the inner end plates.

[0012] Preferably, the two outer end plates are also provided with air holes respectively, and the air holes are connected with the cavity;

[0013] The side of the inner cylinder is provided with a ventilation hole;

[0014] The outer tube is also provided with an arc plate with the same arc as that of the inner tube. The arc plate is a major arc and is attached to the bottom of the inner tube.

[0015] Preferably, a planetary mechanism is also arranged between the inner end plate and the outer end plate located on the same side of the rotating shaft, the rotating shaft is arranged in the sun gear of the planetary mechanism, the ring gear of the planetary mechanism is fixed on the outer end plate, the rotating shaft of the planetary wheel is fixed on the inner end plate, and a planetary drive shaft is arranged on the planetary carrier of the planetary mechanism, the planetary drive shaft passes through the outer end plate, and the planetary mechanism drives the rotating shaft and the inner cylinder to rotate differentially.

[0016] Preferably, both ends of the rotating shaft are respectively fixedly connected to the inner end plate and rotatably connected to the outer end plate.

[0017] Preferably, a feeding mechanism is provided on the side wall of the outer cylinder, a feeding port corresponding to the position of the feeding mechanism is provided on the side wall of the inner cylinder, and a one-way opening and closing mechanism for the feeding body to enter the inner cylinder is provided at the feeding port.

[0018] Preferably, the feeding mechanism comprises an external feeding channel and an internal feeding channel slidably arranged in the external feeding channel;

[0019] The one-way opening and closing mechanism includes a plurality of sealing plates and a sealing plate shaft. The plurality of sealing plates are used to close the feeding port. The sealing plates are rotatably arranged on the inner wall of the inner cylinder through the sealing plate shaft. A torsion spring is also sleeved on the sealing plate shaft. The two free ends of the torsion spring are respectively in contact with the sealing plate and the inner cylinder.

[0020] Preferably, the feeding port is formed with a guide platform on the outer wall of the inner tube, and the inner wall of the guide platform gradually increases in thickness toward the center of the inner tube.

[0021] Preferably, the electromagnetic induction heating drying device for drying particulate matter further comprises a driving mechanism, wherein the driving mechanism is drivingly connected to the planetary driving shaft to drive the rotating shaft to rotate; or

[0022] The driving mechanism is in driving connection with the rotating shaft to drive the rotating shaft to rotate;

[0023] The driving mechanism comprises a servo motor, an encoder and a controller. The output shaft of the servo motor is transmission-connected to a planetary drive shaft or a rotating shaft through an encoder, and the controller is signal-connected to the servo motor and the encoder.

[0024] Preferably, the inner cylinder and the outer cylinder are respectively provided with manual discharge ports on the side, and the manual discharge ports are located on one side of the inner cylinder and the outer cylinder.

[0025] The above solution of the utility model has the following beneficial effects:

[0026] In the present application, the inner cylinder and the rotating shaft rotate at a differential speed or at the same speed, and the stirring plates and heating plates thereon continuously cut the magnetic field to generate heat to heat the material in the inner cylinder; the material accumulated in the inner cylinder is continuously lifted up, so that the material in the inner cylinder is in a constant tumbling state, ensuring that the material is evenly heated.

[0027] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a cross-sectional view of the inner cylinder and the outer cylinder during differential motion;

[0029] Figure 2 yes Figure 1 A magnified view of part A;

[0030] Figure 3 is a schematic diagram of a stirring plate and a heating plate;

[0031] Figure 4 It is a schematic diagram of the sealing piece in the local inner cylinder;

[0032] Figure 5 It is a schematic diagram of the gear mechanism;

[0033] Figure 6 It is a cross-sectional view of the inner cylinder and the outer cylinder when they move at the same speed.

[0034] [Description of Reference Numerals]

[0035] 1. Inner cylinder; 11. Stirring plate; 12. Arc plate; 2. Rotating shaft; 21. Heating plate; 3. Electromagnetic induction coil; 4. Outer cylinder; 41. Air hole; 5. Planetary mechanism; 51. Planetary frame; 6. Feeding mechanism; 61. External feeding channel; 62. Internal feeding channel; 63. Sealing piece; 64. Guide table. DETAILED DESCRIPTION

[0036] In order to make the technical problems to be solved, technical solutions and advantages of the present invention more clear, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0037] like Figure 1-5 As shown, an embodiment of the utility model provides an electromagnetic induction heating drying device for drying particulate matter, comprising an inner cylinder 1, a rotating shaft 2 and an electromagnetic induction coil 3, wherein a stirring plate 11 is arranged on the inner wall of the inner cylinder 1, and a plurality of stirring plates 11 are arranged along the axial direction of the inner cylinder 1. The rotating shaft 2 is coaxially arranged in the inner cylinder 1, and a heating plate 21 arranged along the axial direction of the rotating shaft 2 is arranged on the rotating shaft 2, and the heating plate 21 is spirally arranged on the rotating shaft 2. The rotating shaft 2 and the inner cylinder 1 rotate at a differential speed or at the same speed. An electromagnetic induction coil 3 is also arranged on the outer side of the inner cylinder 1, and a plurality of groups of electromagnetic induction coils 3 are arranged, and a plurality of groups of electromagnetic induction coils 3 are arranged along the axial direction of the inner cylinder 1, and the electromagnetic induction coils 3 in each group are arranged symmetrically with respect to the rotating shaft 2 of the inner cylinder 1.

[0038] When the inner cylinder 1 and the rotating shaft 2 rotate, the stirring plate 11 and the heating plate 21 both cut the magnetic flux lines generated by the electromagnetic induction coil 3, and heat the stirring plate 11 and the heating plate 21. When the inner cylinder 1 rotates, the material accumulated at the bottom of the inner cylinder 1 is driven to rotate by the blocking of the stirring plate 11. During the rotation, the material rolls and mixes, avoiding the material from accumulating at the bottom of the inner cylinder 1 for a long time, so that the material is dried evenly. At the same time, the stirring plate 11 and the heating plate 21 cut the electromagnetic induction coil 3 to avoid interfering with the rotation of the inner cylinder 1.

[0039] The present application also includes an outer cylinder 4 arranged outside the inner cylinder 1, the outer cylinder 4 is coaxially arranged with the inner cylinder 1, and a cavity is formed between the inner cylinder 1 and the outer cylinder 4, and the aforementioned electromagnetic induction coil 3 is located in the cavity and fixed on the inner wall of the outer cylinder 4. In the present application, the outer cylinder 4 does not rotate, and plays a role of fixing and supporting. The two ends of the outer cylinder 4 are also provided with outer end plates, and the two outer end plates are respectively fixedly connected to the two ends of the outer cylinder 4. The two ends of the inner cylinder 1 are also provided with inner end plates, and the two inner end plates are respectively fixedly connected to the two ends of the inner cylinder 1.

[0040] Furthermore, air holes 41 are respectively provided on the outer end plates, and the air holes 41 on the two outer end plates are respectively used for air intake and air outlet. The air holes 41 can be used to fill with drying gas, and the drying gas flows along the axial direction of the inner tube 1. Preferably, the air holes 41 are arranged in a ring on the outer end plates.

[0041] Furthermore, two arc plates 12 with the same arc as the inner cylinder 1 are arranged outside the inner cylinder 1, and the arc plates 12 are arc-shaped. The two arc plates 12 are arranged along the axial direction of the inner cylinder, supported below the inner cylinder 1 and fixed on the inner wall of the outer cylinder 4. Ventilation holes are arranged on the side of the inner cylinder 1, and the heat of the cavity and the inner cylinder 1 is exchanged through the ventilation holes.

[0042] Furthermore, in order to realize the differential rotation of the inner cylinder 1 and the rotating shaft 2 in the present application, a planetary mechanism 5 is also provided between the inner end plate and the outer end plate on the same side of the rotating shaft 2. In the present application, both sides of the rotating shaft 2 have planetary mechanisms 5. Usually, the planetary mechanism 5 includes a sun gear, a planetary gear, a ring gear and a planet carrier 51. The sun gear and the planetary gear are located in the ring gear, the planetary gears are meshed with the sun gear and the ring gear respectively, and the planet carrier 51 is provided on the planetary gear.

[0043] In the present application, the two ends of the rotating shaft 2 are passed through the two inner end plates, and the sun gear is arranged at the two ends of the rotating shaft 2. The ring gear is fixed on the outer end plate, the planetary carrier 51 is arranged on the planetary wheel, and the rotating shaft of the planetary wheel is fixed on the inner end plate. The center of the planetary carrier 51 is provided with a planetary drive shaft, and the planetary drive shaft is passed through the outer end plate. When the planetary drive shaft rotates, the planetary carrier 51 drives each planetary wheel to rotate around the sun wheel, and the inner end plate fixedly connected to the rotating shaft of the planetary wheel moves with it; at the same time, through the meshing of the sun wheel and the planetary wheel, the sun wheel rotates drivenly, and drives the rotating shaft 2 connected to the sun wheel to rotate, thereby realizing the differential rotation of the rotating shaft 2 and the inner cylinder 1.

[0044] Preferably, bearings are provided between the rotating shaft 2 and the inner end plate, and between the planetary drive shaft and the outer end plate to reduce friction.

[0045] like Figure 6 In order to realize the synchronous rotation of the rotating shaft 2 and the inner cylinder 1, the two ends of the rotating shaft 2 are fixedly connected to the inner end plate. The rotating shaft 2 realizes the synchronous rotation with the inner cylinder 1 by driving the inner end plate to rotate. The two ends of the rotating shaft 2 are also rotatably set on the outer end plate. Preferably, the rotating shaft 2 is set on the outer end plate through a bearing so that the rotating shaft 2 can rotate relative to the outer end plate.

[0046] Furthermore, a feeding mechanism 6 is provided on the side wall of the outer cylinder 4, and a feeding port corresponding to the position of the feeding mechanism 6 is provided on the side wall of the inner cylinder 1. A one-way opening and closing mechanism is provided at the feeding port so that the material can only be fed from the outer cylinder 4 to the inner cylinder 1.

[0047] Specifically, the feeding mechanism 6 includes an external feeding channel 61 and an internal feeding channel 62, the external feeding channel 61 is arranged on the outer tube 4, and the internal feeding channel 62 is slidably arranged in the external feeding channel 61, and a pushing mechanism is also arranged on the external feeding channel 61, the pushing mechanism is passed through the external feeding channel 61 and connected to the internal feeding channel 62, and the pushing mechanism pushes the internal feeding channel 62 to move along the axial direction of the external feeding channel 61.

[0048] In this embodiment, the pushing mechanism is an electric push rod, which is symmetrically arranged on both sides of the external feeding channel 61, and the fixed end of the electric push rod is fixed to the external feeding channel 61. The side wall of the external feeding channel 61 is provided with a slide groove along the axial direction of the external feeding, and a connecting piece slides in the slide groove, and the movable end of the electric push rod is connected to the internal feeding channel 62 through the connecting piece.

[0049] Preferably, the inner feeding channel 62 and the outer feeding channel 61 are made of steel and have hardness.

[0050] Furthermore, the one-way opening and closing mechanism includes a sealing piece 63 and a sealing piece shaft. The sealing piece 63 is used to close the feeding port. The sealing piece 63 is rotatably arranged on the inner wall of the inner cylinder 1 through the sealing piece shaft. A torsion spring is also sleeved on the sealing piece shaft. The two free ends of the torsion spring are respectively in contact with the inner cylinder 1 and the sealing edge.

[0051] In this embodiment, the feeding port is circular, and the sealing sheet 63 is a fan-shaped structure. When closed, a plurality of sealing sheets 63 form a circle for closing the feeding port. The radius of the sealing sheet 63 is larger than the diameter of the feeding port, which is convenient for the installation of the sealing sheet 63. A plurality of sealing sheets 63 are arranged at the feeding port in an annular array, and the sealing sheet shaft is fixed on the inner wall of the inner cylinder 1. The sealing sheet 63 is rotatably arranged on the sealing sheet shaft to form a structure similar to a hinge. The torsion spring is sleeved on the sealing sheet shaft, and the feeding port is closed as normal by the elastic force of the torsion spring itself.

[0052] Preferably, a guide platform 64 is formed on the outer wall of the inner tube 1 at the feeding port, and the inner wall of the guide platform 64 gradually approaches the center direction of the inner tube 1, that is, the inner wall of the inner guide platform 64 is tapered. Under the guidance of the inner wall of the guide platform 64, the inner feeding channel 62 can be accurately inserted into the feeding port to avoid misalignment between the inner feeding channel 62 and the feeding port.

[0053] Since the guide platform 64 is installed, the guide platform 64 will interfere with the arc plate 12 when the inner tube 1 rotates. Therefore, the two arc plates 12 are arranged at intervals to leave space for the rotation of the guide platform 64. Correspondingly, no ventilation holes are arranged at the circular ring where the guide platform 64 is located.

[0054] The present application also includes a driving mechanism, which is connected to the planetary gear shaft or connected to the rotating shaft 2 to drive the rotating shaft 2 and the inner cylinder 1 to rotate. In this embodiment, the driving mechanism includes a servo motor, an encoder and a controller, the encoder is arranged at the output end of the servo motor, and the encoder is also connected to the planetary drive shaft. The controller is at least connected to the servo motor and the encoder signal. The controller can also be connected to the electric push rod signal.

[0055] Preferably, a manual discharge port is provided on the same side of the inner cylinder 1 and the outer cylinder 4 respectively.

[0056] As an exemplary embodiment, a manual discharge structure is provided in the present embodiment, which is used to be arranged at the manual discharge port. Specifically, a discharge port body is opened on the left side of the inner cylinder 1 and the outer cylinder 4. Taking the manual discharge port of the inner cylinder 1 as an example, a baffle is arranged around the discharge port, and the baffle is rotatably connected to the inner cylinder 1 through a hinge. A locking member is also arranged between the baffle and the inner cylinder. When discharge is required, the baffle located at the outer cylinder 4 and the baffle located at the inner cylinder 1 are opened in turn. When discharge is not required, the baffle located at the inner cylinder 1 and the baffle located at the outer cylinder 4 are closed in turn, and the baffle is maintained to close the feeding port body through the locking member.

[0057] When using this application, first, the device needs to be placed on an inclined workbench so that the end with the manual discharge port is lower than the other end. Then, the material is fed into the unloading mechanism 6 through other feeding equipment. When the feeding equipment feeds, the inner feeding channel 62 moves toward the inner cylinder 1 and abuts against the sealing piece 63, pushing the sealing piece 63 to rotate inward, thereby achieving the purpose of opening the feeding port. After the feeding is completed, the inner feeding channel 62 moves away from the inner cylinder 1, and the sealing piece 63 rebounds to close the feeding port. At this time, the servo motor drives the planetary mechanism 5 to move, and the inner cylinder 1 and the rotating shaft 2 rotate. During the rotation, the heated inert gas is filled into the cavity to bring the water vapor evaporated from the material out of the cavity. During the rotation, the heating plate 21 and the stirring plate 11 cut the magnetic field generated by the electromagnetic induction coil 3, so that the heating plate 21 and the stirring plate 11 are heated. Under the stirring of the heating plate 21 and the stirring plate 11, the material accumulated at the bottom of the inner cylinder 1 rotates with the inner cylinder 1, falls from the highest point and is scattered by the heating plate 21, and falls between the stirring plates 11. The material is in a continuous stirring process and can be evenly heated.

[0058] When drying is completed, the servo motor stops working. Since the encoder and controller are installed, the servo motor can ensure that when the inner drum 1 stops rotating, the feeding port is directly opposite to the unloading mechanism 6, and the manual feeding ports of the inner drum 1 and the outer drum 4 are directly opposite. At this time, manual feeding or secondary feeding is performed.

[0059] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An electromagnetic induction heating drying device for drying particulate matter, characterized in that: include: An inner cylinder (1), the inner wall of which is provided with a stirring plate (11) arranged along the axial direction of the inner cylinder (1); A rotating shaft (2) is coaxially arranged in the inner cylinder (1), the rotating shaft (2) and the inner cylinder (1) rotate at the same speed, the rotating shaft (2) is provided with a heating plate (21) arranged along the axial direction of the rotating shaft (2), and a plurality of the heating plates (21) are spirally arranged on the rotating shaft (2); A plurality of electromagnetic induction coils (3) are arranged along the axial direction of the inner cylinder (1), and each group of electromagnetic induction coils (3) is arranged outside the inner cylinder (1) in a centrally symmetrical manner.

2. The electromagnetic induction heating drying device for drying particulate matter according to claim 1, characterized in that: The electromagnetic induction heating drying device for drying particulate matter further comprises an outer cylinder (4) coaxially arranged with the inner cylinder (1), a cavity is formed between the outer cylinder (4) and the inner cylinder (1), and the electromagnetic induction coil (3) is arranged in the cavity and fixed on the outer cylinder (4); The two ends of the outer cylinder (4) are also provided with outer end plates respectively, and the two outer end plates are fixedly connected to the two ends of the outer cylinder (4) respectively; Inner end plates are also provided at both ends of the inner cylinder (1), and the two inner end plates are respectively fixedly connected to the inner cylinder (1), and the two ends of the rotating shaft (2) are respectively passed through the inner end plates.

3. The electromagnetic induction heating drying device for drying particulate matter according to claim 2, characterized in that: The two outer end plates are also respectively provided with air holes (41), and the air holes (41) are communicated with the cavity; The side of the inner cylinder (1) is provided with a ventilation hole; The outer cylinder (4) is also provided with an arc plate (12) having the same arc as the inner cylinder (1); the arc plate (12) is a major arc and is attached to the bottom of the inner cylinder (1).

4. The electromagnetic induction heating drying device for drying particulate matter according to claim 2, characterized in that: Both ends of the rotating shaft (2) are respectively fixedly connected to the inner end plate and rotatably connected to the outer end plate.

5. The electromagnetic induction heating drying device for drying particulate matter according to claim 4, characterized in that: A feeding mechanism (6) is arranged on the side wall of the outer cylinder (4), and a feeding port corresponding to the position of the feeding mechanism (6) is arranged on the side wall of the inner cylinder (1), and a one-way opening and closing mechanism for the feeding body to enter the inner cylinder (1) is arranged at the feeding port.

6. The electromagnetic induction heating drying device for drying particulate matter according to claim 5, characterized in that: The feeding mechanism (6) comprises an external feeding channel (61) and an internal feeding channel (62) slidably arranged in the external feeding channel (61); The one-way opening and closing mechanism comprises a plurality of sealing plates (63) and a sealing plate shaft. The plurality of sealing plates (63) are used to close the feeding port. The sealing plates (63) are rotatably arranged on the inner wall of the inner cylinder (1) via the sealing plate shaft. A torsion spring is also sleeved on the sealing plate shaft. The two free ends of the torsion spring are respectively in contact with the sealing plates (63) and the inner cylinder (1).

7. The electromagnetic induction heating drying device for drying particulate matter according to claim 6, characterized in that: The feeding port is formed with a guide platform (64) on the outer wall of the inner tube (1), and the inner wall of the guide platform (64) gradually increases in thickness toward the center of the inner tube (1).

8. The electromagnetic induction heating drying device for drying particulate matter according to claim 6, characterized in that: The electromagnetic induction heating drying device for drying particulate matter further comprises a driving mechanism, wherein the driving mechanism is in driving connection with the rotating shaft (2) to drive the rotating shaft (2) to rotate; The driving mechanism comprises a servo motor, an encoder and a controller. The output shaft of the servo motor is transmission-connected to the rotating shaft (2) via the encoder, and the controller is signal-connected to the servo motor and the encoder.

9. The electromagnetic induction heating drying device for drying particulate matter according to claim 8, characterized in that: The inner cylinder (1) and the outer cylinder (4) are respectively provided with manual discharge ports on the side, and the manual discharge ports are located on one side of the inner cylinder (1) and the outer cylinder (4).

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