Granulating apparatus

Abstract

The utility model provides a kind of granulating equipment.The granulating equipment includes: barrel, barrel has feed inlet, discharge outlet and exhaust port;Screw rod, screw rod is rotatably arranged in barrel, screw rod includes granulating section and depolymerization section, depolymerization section is close to discharge outlet relative to granulating section, exhaust port is at least partially covered in depolymerization section setting.The utility model solves the problem that existing technology exists in granulating equipment Agglomerated particle affects the uniformity of mixing.

Description

Technical Field

[0001] This utility model relates to the technical field of negative electrode material production equipment, and more specifically, to a granulation device. Background Technology

[0002] In the production of graphite anode materials for lithium-ion batteries, granulation is a crucial step. Traditional granulation processes typically employ a granulation reactor, where graphite raw material powder and asphalt powder are mixed in a specific ratio and added to the reactor. The rotation of the stirring paddle inside the reactor ensures thorough mixing of the materials at high temperatures, melting the asphalt powder and coating it onto the surface of the graphite raw material, thus forming secondary particles and producing the semi-finished graphite anode material. However, existing granulation equipment suffers from the following problem: during the granulation process, the material easily forms agglomerated particles, making it difficult to mix evenly in subsequent processes.

[0003] In other words, existing granulation equipment suffers from the problem of agglomerated particles affecting the uniformity of mixing. Utility Model Content

[0004] The main objective of this invention is to provide a granulation device to solve the problem of agglomerated particles affecting the uniformity of mixing in existing granulation devices.

[0005] To achieve the above objectives, according to one aspect of the present invention, a granulation device is provided, comprising: a cylinder having a feed inlet, a discharge outlet, and an exhaust outlet; and a screw rotatably disposed within the cylinder, the screw including a granulation section and a deagglomeration section, the deagglomeration section being closer to the discharge outlet than the granulation section, and the exhaust outlet being at least partially covering the deagglomeration section.

[0006] Furthermore, the granulation section includes a first rod and a first threaded structure disposed on the first rod, and the depolymerization section includes a second rod and a plurality of toothed structures, wherein the plurality of toothed structures are disposed around the second rod, and the first rod is connected to the second rod.

[0007] Furthermore, the depolymerization section includes a first depolymerization sub-segment and a second depolymerization sub-segment connected in sequence. Multiple tooth-like structures in the first depolymerization sub-segment are arranged along a first helical direction, and multiple tooth-like structures in the second depolymerization sub-segment are arranged along a second helical direction. The first helical direction is opposite to the second helical direction.

[0008] Furthermore, the first depolymerization segment is closer to the granulation segment than the second depolymerization segment, and the helical direction of the first thread structure is the same as the first helical direction.

[0009] Furthermore, at least a portion of the depolymerization section is exposed to the discharge port setting.

[0010] Furthermore, the discharge port and the exhaust port are located on the side wall of the cylinder, and the discharge port and the exhaust port are located on opposite sides of the cylinder.

[0011] Furthermore, at least a portion of the discharge port is positioned directly opposite the exhaust port.

[0012] Furthermore, the granulation equipment also includes an exhaust gas treatment device, which is connected to the exhaust port.

[0013] Furthermore, the granulation equipment also includes a drive mechanism, which is connected to one axial end of the screw. The screw is arranged along the axial direction of the cylinder, and the feed inlet is opened on the side wall of the cylinder.

[0014] Furthermore, a through hole is provided at one axial end of the cylinder, and the axial end of the screw passes through the through hole and is connected to the drive mechanism.

[0015] According to the technical solution of this utility model, the granulation equipment includes a cylinder and a screw. The cylinder has a feed inlet, a discharge outlet and an exhaust outlet. The screw is rotatably disposed in the cylinder and includes a granulation section and a depolymerization section. The depolymerization section is closer to the discharge outlet than the granulation section, and the exhaust outlet is at least partially covered by the depolymerization section.

[0016] By incorporating a granulation section on the screw, the material can be uniformly granulated under its action. A deagglomeration section on the screw deagglomerates the granulated material, dispersing agglomerates and reducing the proportion of agglomerated particles, which is beneficial for uniform mixing in subsequent processes. Since deagglomerated particles easily generate tar gas, the exhaust port is designed to at least partially cover the deagglomeration section to facilitate the discharge of tar gas generated during the deagglomeration process. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of a granulation device according to an optional embodiment of the present invention is shown;

[0019] Figure 2 It shows Figure 1 Schematic diagram of the middle screw;

[0020] Figure 3 A schematic diagram of the structure of the depolymerization section of the screw in an optional embodiment of the present invention is shown.

[0021] Figure 4 A schematic diagram of the depolymerization section of the screw in another alternative embodiment of the present invention is shown at one angle.

[0022] The above figures include the following reference numerals:

[0023] 10. Cylinder; 11. Feed inlet; 12. Discharge outlet; 13. Exhaust outlet; 14. Through hole; 20. Screw; 30. Granulation section; 31. First rod body; 32. First threaded structure; 40. Depolymerization section; 41. Second rod body; 42. Toothed structure; 43. First depolymerization sub-section; 44. Second depolymerization sub-section; 45. Second spiral structure; 451. First sub-spiral section; 452. Second sub-spiral section; 80. Exhaust gas treatment device; 90. Drive mechanism. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0027] To address the problem of agglomerated particles affecting the uniformity of mixing in existing granulation equipment, this invention provides a granulation device.

[0028] like Figures 1 to 4 As shown, the granulation equipment includes a cylinder 10 and a screw 20. The cylinder 10 has a feed inlet 11, a discharge outlet 12 and an exhaust outlet 13. The screw 20 is rotatably disposed inside the cylinder 10. The screw 20 includes a granulation section 30 and a depolymerization section 40. The depolymerization section 40 is closer to the discharge outlet 12 than the granulation section 30. The exhaust outlet 13 is disposed to at least partially cover the depolymerization section 40.

[0029] The cylinder 10 has shaft holes at both ends, and the two ends of the screw 20 are respectively inserted into the shaft holes. The outer diameter of the screw 20 is smaller than the inner diameter of the cylinder 10, and the screw 20 can rotate inside the cylinder 10.

[0030] By providing a granulation section 30 on the screw 20, the material can be uniformly granulated under the action of the granulation section 30. A deagglomeration section 40 is provided on the screw 20 to deagglomerate the granulated material, allowing agglomerates to be dispersed and reduced, thus lowering the proportion of agglomerated particles and facilitating uniform mixing in subsequent processes. Since tar gas is easily generated after agglomeration of particles, the exhaust port 13 is designed to at least partially cover the deagglomeration section 40 to facilitate the discharge of tar gas generated during the deagglomeration process.

[0031] In some alternative embodiments, please refer to Figure 1 The extrusion granulation equipment also includes an exhaust gas treatment device 80. The exhaust port 13 is connected to the exhaust gas treatment device 80. The exhaust gas generated during the granulation process is filtered and purified by the exhaust gas treatment device 80 to reduce air pollution and make it more environmentally friendly, so that the production of graphite materials meets the requirements of green and low carbon (ESG).

[0032] In some embodiments, the exhaust gas treatment device 80 includes a housing and a filter screen for filtering the exhaust gas, thereby achieving purification of the exhaust gas.

[0033] In some alternative embodiments, please refer to Figure 1 and Figure 2 The granulation section 30 includes a first rod 31 and a first threaded structure 32 disposed on the first rod 31. The deagglomeration section 40 includes a second rod 41 and multiple toothed structures 42, with the multiple toothed structures 42 surrounding the second rod 41. The first rod 31 is connected to the second rod 41. By providing the first threaded structure 32 on the first rod 31, efficient material propulsion and granulation can be achieved during the rotation of the first threaded structure 32. The multiple toothed structures 42 on the deagglomeration section 40 ensure that the granulated material is fully deagglomerated. Connecting the first rod 31 and the second rod 41 together ensures the continuity and uniformity of the material during the granulation and deagglomeration processes, which is beneficial for improving production efficiency.

[0034] In some alternative embodiments, the granulation requirements of different materials can be adapted by changing the pitch of the first thread structure 32, the diameter of the first rod 31, and the shape and size of the tooth structure 42. No specific limitations are imposed here.

[0035] In some alternative embodiments, the pitch of the first thread structure 32 on the first rod 31 gradually decreases along the material's forward direction, which is beneficial for pushing the material to the discharge port 12.

[0036] In some alternative embodiments, please refer to Figure 3The deagglomeration section 40 includes a first deagglomeration sub-section 43 and a second deagglomeration sub-section 44 connected sequentially. Multiple toothed structures 42 in the first deagglomeration sub-section 43 are arranged along a first helical direction, and multiple toothed structures 42 in the second deagglomeration sub-section 44 are arranged along a second helical direction, with the first and second helical directions being opposite. By dividing the deagglomeration section 40 into the first deagglomeration sub-section 43 and the second deagglomeration sub-section 44, and arranging toothed structures 42 in opposite helical directions in the first and second deagglomeration sub-sections 43 and 44 respectively, the material is subjected to two deagglomeration forces in opposite directions when passing through the first and second deagglomeration sub-sections 43 and 44. This dual deagglomeration mechanism can more thoroughly disperse agglomerates formed during granulation, ensuring the dispersion and uniformity of the granulated material particles. The design of the toothed structures 42 increases the contact area between the material and the screw 20 surface, and simultaneously enhances the deagglomeration effect through the shearing action of their edges. Compared to a single depolymerization structure, this design significantly improves the efficiency of material depolymerization and shortens the time required for depolymerization.

[0037] During the continuous forward movement of the material, the toothed structure 42 of the first deagglomeration segment 43 will push the material in the first direction. Since the spiral directions of the toothed structure 42 on the first deagglomeration segment 43 and the second deagglomeration segment 44 are opposite, when the material enters the second deagglomeration segment 44, the second deagglomeration segment 44 will push the material back, which can prevent the material from accumulating at the end of the cylinder 10 and facilitate the material to enter the subsequent process.

[0038] In some alternative embodiments, the first depolymerization segment 43 is closer to the granulation section 30 than the second depolymerization segment 44, and the helical direction of the first threaded structure 32 is the same as the first helical direction. By setting the helical direction of the first depolymerization segment 43 closer to the granulation section 30 to be the same as the helical direction of the first threaded structure 32 on the granulation section 30, this design ensures that the material does not encounter abrupt changes in direction when entering the depolymerization stage, resulting in a more natural and continuous material flow. This helps to reduce material accumulation or unnecessary resistance caused by sudden changes in direction.

[0039] In some alternative embodiments, multiple tooth-like structures 42 are directly disposed on the second rod 41 and form a helical structure.

[0040] In some alternative embodiments, please refer to Figure 3The deagglomeration section 40 also includes a second helical structure 45, which is disposed on the second rod 41, and a toothed structure 42 is disposed on the outer side of the second helical structure 45 away from the second rod 41. The second helical structure 45 can propel the material forward while dispersing and mixing it. The toothed structure 42 is disposed on the outer side of the second helical structure 45 away from the second rod 41, which on the one hand increases the shearing force of the toothed structure 42 on the material, helping to further disperse the agglomerated material into finer particles. On the other hand, it works in conjunction with the second helical structure 45 to further reduce the proportion of agglomerated particles.

[0041] In addition, the second spiral structure 45 can also propel the material forward when the screw 20 rotates. Even if the material becomes relatively loose during the deagglomeration process, it can ensure that the material moves smoothly and continuously along the predetermined path to the next processing stage, avoiding material stagnation or deceleration caused by the deagglomeration effect.

[0042] In some alternative embodiments, please refer to Figure 3 The second helical structure 45 includes a first sub-helical segment 451 and a second sub-helical segment 452, which are spaced apart on the second rod 41. The helical directions of the first sub-helical segment 451 and the second sub-helical segment 452 are opposite, and both the first sub-helical segment 451 and the second sub-helical segment 452 have toothed structures 42 on the side away from the second rod 41. By setting the first sub-helical segment 451 and the second sub-helical segment 452 to have opposite helical directions, the helical directions of the toothed structures 42 are also opposite, ensuring bidirectional deagglomeration of the material in the deagglomeration section, improving the deagglomeration effect, and preventing the material from accumulating at the end of the cylinder 10.

[0043] Furthermore, the first sub-spiral section 451 and the second sub-spiral section 452 have opposite spiral directions. This means that the material will be subjected to shear forces in two directions when passing through the first sub-spiral section 451 and the second sub-spiral section 452. This bidirectional alternating shearing action can more thoroughly destroy the agglomeration structure of the material, especially for materials that are difficult to completely deagglomerate under a single spiral direction. The opposite spiral direction design means that the material will not only be subjected to shear forces in the deagglomeration section 40, but will also undergo a certain degree of stirring and tumbling, which helps to uniformly disperse the material particles, avoids the phenomenon of local over-density or over-sparseness, and improves the quality consistency of the granulated material.

[0044] In some alternative embodiments, the first sub-spiral segment 451 is closer to the granulation section 30 than the second sub-spiral segment 452, and the helical direction of the first sub-spiral segment 451 is the same as the helical direction of the first thread structure 32. The same helical direction of the first sub-spiral segment 451 as the granulation section 30 provides a smooth path for the transition from granulation to deagglomeration. The material does not suddenly encounter a sharp change in direction, thus avoiding material accumulation or unnecessary pressure that may occur during the transition, ensuring a smooth transition of the material from the granulation section to the deagglomeration section. This arrangement also facilitates the gentle advancement of the material.

[0045] In some alternative embodiments, please refer to Figure 1 At least a portion of the deagglomeration section 40 is exposed at the discharge port 12. This arrangement allows the aggregated material to directly enter the discharge port 12 and exit the cylinder 10, thereby reducing the proportion of agglomerated particles in the material entering subsequent processes. In other words, at least a portion of the structure of the deagglomeration section 40 is visible from the discharge port 12.

[0046] In some alternative embodiments, please refer to Figure 1 The discharge port 12 and the exhaust port 13 are located on the side wall of the cylinder 10, and are located on opposite sides of the cylinder 10. Positioning the discharge port 12 and the exhaust port 13 opposite each other facilitates the smooth discharge of material and gas from the cylinder 10. Preferably, the exhaust port 13 is located above the discharge port 12, with gas flowing out of the cylinder 10 from the upper exhaust port 13 and material flowing out of the cylinder from the lower discharge port 12.

[0047] In some alternative embodiments, please refer to Figure 1 At least a portion of the discharge port 12 is positioned directly opposite the exhaust port 13. This arrangement ensures that the gas generated when the material enters the subsequent process through the discharge port 12 can still be discharged through the exhaust port 13, reducing the amount of gas entering the subsequent process and effectively minimizing the impact of the temperature carried by the gas on the subsequent process.

[0048] In some optional embodiments, the granulation equipment further includes a drive mechanism 90, which is connected to one axial end of the screw 20. The screw 20 is arranged axially along the cylinder 10, and the feed inlet 11 is located on the side wall of the cylinder 10. The drive mechanism 90 is used to drive the screw 20 to rotate, so that the material moves within the cylinder 10 and is granulated and deagglomerated within the cylinder 10. The feed inlet 11 is located on the side wall of the cylinder 10, and a portion of the screw 20 corresponds to the feed inlet 11, so that the material entering the cylinder 10 through the feed inlet 11 can be immediately agitated by the screw 20, which facilitates rapid mixing of the material and improves granulation efficiency.

[0049] In some alternative embodiments, a through hole 14 is provided at one axial end of the cylinder 10, and the axial end of the screw 20 passes through the through hole 14 and is connected to the drive mechanism 90. By providing a through hole 14 at one axial end of the cylinder 10, interference with the feed inlet 11, discharge outlet 12, and exhaust outlet 13 provided on the side wall of the cylinder 10 can be reduced. Utilizing the axial space of the cylinder 10 to connect with the drive mechanism 90 not only facilitates the rotation of the screw 20 but also benefits the layout of the granulation equipment, allowing the exhaust gas treatment device to be placed on one side of the cylinder 10, thus optimizing space and improving space utilization.

[0050] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0051] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0052] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0053] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A granulation device, characterized in that, include: The cylinder (10) has a feed inlet (11), a discharge outlet (12) and an exhaust outlet (13); The screw (20) is rotatably disposed within the cylinder (10), the screw (20) including a granulation section (30) and a depolymerization section (40), the depolymerization section (40) being located near the discharge port (12) relative to the granulation section (30), and the vent (13) being disposed at least partially covering the depolymerization section (40).

2. The granulation equipment according to claim 1, characterized in that, The granulation section (30) includes a first rod (31) and a first threaded structure (32) disposed on the first rod (31). The depolymerization section (40) includes a second rod (41) and a plurality of toothed structures (42), and the plurality of toothed structures (42) are disposed around the second rod (41). The first rod (31) is connected to the second rod (41).

3. The granulation equipment according to claim 2, characterized in that, The depolymerization segment (40) includes a first depolymerization sub-segment (43) and a second depolymerization sub-segment (44) connected in sequence. The plurality of tooth-like structures (42) in the first depolymerization sub-segment (43) are arranged along a first helical direction, and the plurality of tooth-like structures (42) in the second depolymerization sub-segment (44) are arranged along a second helical direction. The first helical direction is opposite to the second helical direction.

4. The granulation equipment according to claim 3, characterized in that, The first depolymerization segment (43) is closer to the granulation segment (30) than the second depolymerization segment (44), and the helical direction of the first thread structure (32) is the same as the first helical direction.

5. The granulation equipment according to claim 1, characterized in that, At least a portion of the depolymerization section (40) is exposed at the outlet (12).

6. The granulation equipment according to claim 1, characterized in that, The discharge port (12) and the exhaust port (13) are located on the side wall of the cylinder (10), and the discharge port (12) and the exhaust port (13) are located on opposite sides of the cylinder (10).

7. The granulation equipment according to claim 6, characterized in that, At least a portion of the discharge port (12) is positioned directly opposite the exhaust port (13).

8. The granulation equipment according to any one of claims 1 to 7, characterized in that, The granulation equipment also includes an exhaust gas treatment device (80), which is connected to the exhaust port (13).

9. The granulation equipment according to any one of claims 1 to 7, characterized in that, The granulation equipment also includes a drive mechanism (90), which is connected to one axial end of the screw (20). The screw (20) is arranged along the axial direction of the cylinder (10), and the feed port (11) is opened on the side wall of the cylinder (10).

10. The granulation equipment according to claim 9, characterized in that, The cylinder (10) has a through hole (14) at one axial end, and the screw (20) passes through the through hole (14) and is connected to the drive mechanism (90).

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