Drying assembly for particle materials

Abstract

The utility model discloses a drying assembly for particle materials. The drying assembly comprises a base, a drying device and a drying device, the cylinder body is rotatably arranged on the base, a treatment cavity is formed in the cylinder body, protruding blades are further arranged on the wall body of the cylinder body, and the cylinder body rotates to drive the blades to stir materials in the treatment cavity; and the drying device is arranged on the cylinder body and is used for heating the materials in the processing cavity. According to the drying assembly for the particle materials, the materials can be efficiently stirred while being dried, the materials can be fully scattered and stirred, the drying effect can be improved, the drying efficiency can be effectively improved, and the productivity is improved while energy consumption is prevented from being increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of industrial processing equipment especially a drying assembly for granular material. BACKGROUND

[0002] Lithium ion battery is the most widely used secondary battery in today's market, and the material on the positive plate of the battery is one of the key factors determining the performance of the battery. Based on the fact that the positive material is mostly micron or nanometer particles, it is easy to react with water to generate surface residual alkali, especially the ternary material with high Ni content, which is more likely to react with water. After the battery is made, the content of residual alkali directly affects its capacity, internal resistance, cycle and rate performance, etc. Therefore, how to improve the drying efficiency and uniformity of granular material, especially in the preparation process of positive material, to avoid the reaction of positive material with moisture and reduce the generation of residual alkali, is the key to improve the performance of the battery.

[0003] The drying effect of the drying equipment in the related art is not ideal, and the energy consumption is large and the production capacity is low; at the same time, it is not suitable for the coating process of the positive material. SUMMARY

[0004] The utility model aims at at least one of the technical problems existing in the prior art. Therefore, one purpose of the utility model is to provide a drying assembly for granular material. The drying assembly for granular material designed according to the utility model can efficiently stir the material while drying the material, the material can be fully dispersed and stirred, the drying effect can be improved, the drying efficiency can be effectively improved, and the production capacity can be improved without increasing energy consumption.

[0005] The drying assembly for granular material according to the utility model comprises a base, a cylinder body rotatably arranged on the base, a processing cavity formed in the cylinder body, a wall of the cylinder body further provided with protruding blades, the cylinder body rotates to drive the blades to stir the material in the processing cavity, and a drying device arranged in the cylinder body and used for heating the material in the processing cavity.

[0006] The drying assembly for granular material according to the utility model at least integrates the functions of stirring and drying, is provided with a rotatable cylinder body, the material can be fully dispersed and stirred during the processing process, the drying effect is improved, the drying device can meet the requirements of material drying and surface modification between different processes in the production process of granular material, the drying efficiency is effectively improved, and the production capacity can be improved without increasing energy consumption.

[0007] According to some embodiments of the present application, the drying device comprises: a heating unit, the heating unit is configured to be circumferentially spaced on the inner wall of the processing cavity, and the temperature of at least one heating unit is adjustable.

[0008] According to some embodiments of the present application, the wall of the cylinder comprises: an outer wall, the outer wall defines an installation space inside; an inner wall, the inner wall is arranged in the installation space and is spaced from the outer wall to define an installation gap, the drying device is arranged in the installation gap, and the inner wall defines the processing cavity inside.

[0009] According to some embodiments of the present application, the wall of the cylinder is formed with a first matching part, and the heating unit is formed with a second matching part for connecting with the first matching part, and the first matching part and the second matching part are detachably connected.

[0010] According to some embodiments of the present application, the drying device further comprises: a temperature measuring device, the temperature measuring device is configured to correspond to a plurality of heating units, and each temperature measuring device is used to measure the temperature of the corresponding heating unit.

[0011] According to some embodiments of the present application, the blade is configured to be a plurality of, and the plurality of blades are respectively configured to be spiral blades which extend along the axis of the cylinder and are distributed along the circumference in the processing cavity.

[0012] According to some embodiments of the present application, the cylinder is arranged obliquely, and the rotation axis of the cylinder intersects with the direction of gravity.

[0013] According to some embodiments of the present application, the cylinder is formed with a feeding port and a discharging port which communicate with the processing cavity, and the cylinder rotates to move the material from the feeding port to the direction of the feeding port.

[0014] According to some embodiments of the present application, the drying assembly for granular material further comprises: a driving device, one end of the driving device is connected with the base, the other end of the driving device is connected with the cylinder, and the driving device is suitable for driving the cylinder to rotate relative to the base.

[0015] According to some embodiments of the present application, the drying assembly for granular material further comprises: a vacuum device, the vacuum device is suitable for vacuumizing the processing cavity to provide a vacuum environment for drying the material.

[0016] In summary, the drying assembly for granular material according to the utility model at least integrates the functions of stirring and drying, is provided with a rotatable cylinder, material can be fully dispersed and stirred during processing, the drying effect is improved, meanwhile, the drying device can meet the requirements of material drying and surface modification among different processes during granular material production, for example, when the granular material is a mixture of positive electrode material and coating agent, drying and coating of the positive electrode material can be realized, the preparation efficiency of the positive electrode material is effectively improved, and the production capacity can be improved while avoiding increasing energy consumption.

[0017] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0019] Fig. 1 is a schematic diagram of the internal structure of the drying assembly according to the utility model embodiment.

[0020] Fig. 2 is a schematic diagram of the overall structure of the drying assembly according to the utility model embodiment.

[0021] Reference Signs:

[0022] 1, drying assembly; 10, cylinder; 10a, processing cavity; 10b, mounting gap; 101, outer wall; 102, inner wall; 11, blade; 20, heating unit; 30, driving device; 2, base; 3, feeding device. DETAILED DESCRIPTION

[0023] The embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0024] In the description of the utility model, it is understood that the directions or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are the directions or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0025] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0026] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] In the utility model, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the indirect contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and inclined upward of the first feature above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and inclined downward of the first feature below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0028] Lithium ion battery is the most widely used secondary battery in today's market, and the material on the positive plate of the battery is one of the key factors to determine the performance of the battery. Based on the fact that the positive electrode material is mostly micron or nanometer particles, it is easy to react with water to generate surface residual alkali, especially the ternary material with high Ni content, which is more likely to react with water. After the battery is made, the content of residual alkali directly affects the capacity, internal resistance, cycle and rate performance, etc. Therefore, how to improve the drying efficiency and uniformity of the particle material, especially in the preparation process of the positive electrode material, to avoid the reaction of the positive electrode material with water and reduce the generation of residual alkali, is the key to improve the performance of the battery.

[0029] The drying equipment in the related art has an unsatisfactory drying effect on the material, high energy consumption, and low productivity; and is not suitable for the coating process of the positive electrode material.

[0030] Reference will now be made to Figs. 1-2 The drying assembly 1 for particle material according to the embodiments of the present application is described.

[0031] As shown in Figs. 1-2 The drying assembly 1 for particle material according to the present application comprises a base 2, a cylinder body 10 and a drying device. The cylinder body 10 is rotatably arranged on the base 2, and a processing cavity 10a is formed in the cylinder body 10. The wall of the cylinder body 10 is further provided with protruding blades 11. The cylinder body 10 rotates to drive the blades 11 to stir the material in the processing cavity 10a. The drying device is arranged in the cylinder body 10 and is used to heat the material in the processing cavity 10a. Specifically, the cylinder body 10 is adapted to contain the material, and the cylinder body 10 serves as the main part of the drying assembly 1. The cylinder body 10 rotates to drive the material to rotate. The blades 11 have a tendency to prevent the material from rotating with the cylinder body 10. At this time, the blades 11 can collide with the material during the rotation of the cylinder body 10, thereby achieving stirring of the material. When the cylinder body 10 rotates, the blades 11 located on the inner wall 102 of the cylinder body 10 stir the material, without the need to arrange other stirring structures, which can reduce the possibility of use failure and foreign matter introduction of the drying assembly 1, greatly reducing the risk. The drying device heats and dries the material, reducing the moisture content of the material. At the same time, the drying device can also modify the surface of the material to make it have better electrical properties and improve the quality of the product. When the drying device works, the material is stirred by the rotation of the cylinder body 10, which can ensure that the material is uniformly heated, avoid local overheating or uneven drying, and ensure stable operation and efficient work of the drying assembly 1.

[0032] Here, the material can refer to a particulate material, especially a positive electrode material in the lithium battery field, or can also include additives such as coating agents, and the drying assembly 1 at least integrates the functions of stirring and drying, has better drying effect, and can realize full drying of the material through the drying assembly 1. The drying assembly 1 can match different process conditions and different series of materials, improve the production capacity of the drying assembly 1 while avoiding increasing energy consumption.

[0033] According to the drying assembly 1 for the particulate material, at least the functions of stirring and drying are integrated, the cylinder 10 that can rotate is arranged, the material can be fully dispersed and stirred during the processing process, the drying effect is improved, and meanwhile, the drying device can consider the requirements of material drying and surface modification between different processes in the production process of the particulate material, effectively improve the drying efficiency, and can improve the production capacity while avoiding increasing energy consumption.

[0034] The drying assembly 1 has low energy consumption and small noise during operation, can be used in the lithium ion battery field, and can also be used in the medical, beauty, biological and other industries. Due to the stirring structure and electric heating form design, the drying efficiency of the raw materials required in the production process of the particulate material can be improved, the production capacity of the production line is greatly improved, and the loss rate of the material is reduced. The drying assembly 1 can maintain a stable state integrating multiple functions, ensure that the finally output product meets the drying degree requirements of different production process products, and is more environmentally friendly, stable and reliable.

[0035] According to some embodiments of the present application, as shown in Fig. 1 The drying device includes a plurality of heating monomers 20 arranged at intervals in the circumferential direction of the inner wall 102 of the processing cavity 10a. The temperature of at least one heating monomer 20 is adjustable. Specifically, the heating monomer 20 can generate heat after being powered on. When the current passes through the resistance material of the heating monomer 20, the resistance material will generate heat and transfer the heat to the surface of the inner wall 102 of the cylinder 10, and then transfer the temperature to the material by indirect heat transfer. The material is dried in the process of continuous overturning and stirring. Here, the electric heating form is more stable, reliable, green, environmentally friendly and efficient compared with the traditional heat conduction oil and steam heating. The design of the cylinder 10 installed with the heating monomer 20 realizes heat transfer through indirect contact. When the material containing a certain amount of water enters the cylinder 10, the cylinder 10 rotates to drive the blade 11 to rotate, so that the material in the cylinder 10 generates continuous vortex centrifugal force and continuously overlaps and overturns to fully stir and dry the material.

[0036] In some embodiments, the heating monomers 20 are arranged at intervals in the circumferential direction of the cylinder 10 to uniformly heat the cylinder 10 and improve the uniformity of the material.

[0037] In some embodiments, the operation of the heating unit 20 and the rotation of the cylinder 10 can be controlled separately. When the heating function is not needed, the rotation of the cylinder 10 can be used to complete the stirring of the material, achieving a multi-functional consideration and a high cost performance.

[0038] According to some embodiments of the present application, as shown in Fig. 1 The wall of the cylinder 10 includes an outer wall 101 and an inner wall 102. The outer wall 101 defines an installation space inside. The inner wall 102 is arranged in the installation space and spaced from the outer wall 101 to define an installation gap 10b. The drying device is arranged in the installation gap 10b, and the inner wall 102 defines a processing cavity 10a inside. Specifically, the cylinder 10 is designed in a double-layer form. The outer wall 101 located in the outer layer can block the heat source, facilitating the operation of the operator. The inner wall 102 located in the inner layer can be used to accommodate the material to be processed. The installation gap 10b between the inner wall 102 and the outer wall 101 can be assembled with the heating unit 20, so as to avoid occupying the space in the processing cavity 10a and improve the heating effect of the heating unit 20.

[0039] According to some embodiments of the present application, the wall of the cylinder 10 is formed with a first matching part, and the heating unit 20 is formed with a second matching part for connecting with the first matching part. The first matching part and the second matching part are detachably connected. Specifically, the first matching part and the second matching part are detachably connected between the heating unit 20 and the cylinder 10, so that the heating unit 20 can be quickly installed on the cylinder 10, facilitating maintenance and fault detection.

[0040] Here, the detachable connection of the first matching part and the second matching part can mean that one of the first matching part and the second matching part can be configured as a clamping protrusion, and the other is configured as a clamping groove, and the first matching part and the second matching part are clamped and matched at this time. Alternatively, one of the first matching part and the second matching part can be configured as a bolt, and the other is configured as a nut, and the first matching part and the second matching part are threadedly connected at this time. Alternatively, the first matching part and the second matching part can be magnetically attracted to achieve the detachable connection of the first matching part and the second matching part. Of course, the detachable connection mode of the first matching part and the second matching part is not limited to the above-mentioned modes, and other modes can also be used. The actual situation can be designed, which is not limited here.

[0041] According to some embodiments of the present application, the drying device further comprises a temperature measuring device, and the temperature measuring device is configured in one-to-one correspondence with the plurality of heating units 20, and each temperature measuring device is used for measuring the temperature of the corresponding heating unit 20. Specifically, each heating unit 20 can be individually set, measured and controlled in temperature, thereby improving accuracy. In some embodiments, the temperature measuring device is fixedly connected with the corresponding heating unit 20, and the modular electric heating part makes it more convenient to maintain and operate the drying assembly 1 during operation and use, and at the same time, the electric heating part can be standardized designed to improve interchangeability, improve universality, and reduce the reserve amount of spare parts.

[0042] According to some embodiments of the present application, as shown in Fig. 1 The plurality of blades 11 are arranged in a spiral along the axis of the cylinder body 10 and are spaced apart in a circumferential direction in the processing cavity 10a, which can avoid the problem of stirring dead angle. The stirring of the plurality of blades 11 arranged in a spiral enables the material to be rolled and mixed in all directions during mixing, thereby ensuring uniformity and sufficiency of mixing, improving the quality of the material, meeting various process requirements, enabling the material to be mixed in a short time, and greatly improving work efficiency. At the same time, the short mixing time also reduces the residence time of the material, reduces the generation of residual alkali on the surface of the positive electrode material, and effectively mixes materials with different specific gravities and different particle sizes. Fig. 1 According to some embodiments of the present application, the cylinder body 10 is inclined and arranged, and the rotation axis of the cylinder body 10 intersects with the direction of gravity. Here, the cylinder body 10 rotates, there is no moving part inside the drying assembly 1, the material does a parabolic motion, and the cylinder body 10 rotates to make the material repeatedly rotate, so that the mixing and stirring are sufficient and there is no dead angle. When rotating, the material moves along the spiral direction of the blade 11, is mixed and stirred in the process of continuous lifting and turning, and the drying uniformity is improved.

[0043] According to some embodiments of the present application, the cylinder body 10 is formed with a feeding port and a discharging port which are in communication with the processing cavity 10a, and the cylinder body 10 rotates to move the material from the feeding port to the direction of the discharging port. Specifically, during the feeding process, the cylinder body 10 rotates, and the material moves along the blade 11 to the direction away from the feeding port, so that the material can be discharged from the discharging port.

[0044] In some embodiments, the base 2 is provided with a feeding device 3, and the feeding device 3 is in communication with the feeding port to feed the material into the feeding port.

[0045]

[0046] ​In some embodiments, the base 2 is provided with a discharging device in selective communication with the discharging port, when the cylinder 10 is rotated to the position that the discharging port is opposite to the discharging device on the base 2, the discharging port is opened to discharge the material from the discharging port.

[0047] In some embodiments, the drying assembly 1 for granular material further comprises a sealing cover in sealing fit with the feeding port and / or the discharging port. Here, the sealing cover is designed and the gap between the sealing cover and the feeding port and / or the sealing cover and the discharging port is sealed to avoid the leakage of the material during the rotation of the cylinder 10. The sealing cover can be provided at the discharging port, during the rotation of the cylinder 10, the discharging port is rotated, when the cylinder 10 is rotated to the position that the discharging port is at the lowest point, the sealing cover is opened to discharge the material from the discharging port, ensuring the discharging amount. The sealing cover can also be provided at the feeding port, after the feeding is completed, the feeding port is closed to avoid the leakage of the material during the rotation of the cylinder 10, ensuring the discharging amount.

[0048] According to some embodiments of the present application, the drying assembly 1 for granular material further comprises a driving device 30, one end of the driving device 30 is connected with the base 2, the other end of the driving device 30 is connected with the cylinder 10, the driving device 30 is adapted to drive the cylinder 10 to rotate relative to the base 2, at this time, the cylinder 10 can rotate relative to the base 2 to realize the stirring operation of the material.

[0049] According to some embodiments of the present application, the drying assembly 1 for granular material further comprises a vacuum device, the vacuum device is adapted to vacuumize the processing cavity 10a to provide a vacuum environment for the drying of the material. Here, the vacuum device can be any structure capable of vacuumizing the processing cavity 10a, the vacuumizing inlet of the vacuum device is connected with the dust collecting port filtering device of the drying assembly 1, during the drying process, the vacuum can reduce the boiling point of water, allowing the water to evaporate and separate at a lower temperature. In addition, the vacuum can also quickly remove the evaporated water, which is used for the drying of lithium battery positive electrode material, can keep the internal environment of the equipment stable, avoid the oxidation conversion of the material, and reduce the increase of the residual alkali content on the surface of the material.

[0050] In some embodiments, the vacuum pump is the core component of the vacuum device, which is used to extract the air inside the drying assembly 1 to form a vacuum environment. Commonly used vacuum pumps include Roots vacuum pump and water ring vacuum pump. During the operation of the external vacuum device and the drying device, the heating unit 20 indirectly heats the material in the process of continuous heating, gradually increasing the temperature of the material continuously stirred in the cylinder 10, and finally forming a high-temperature vacuum environment in the cylinder 10 under the influence of the external vacuum system. In a vacuum state, the vaporization temperature of the water in the material is reduced, the water carried by the material diffuses to the surface and escapes into the low-pressure air in the vacuum, accelerating the dehydration and achieving the drying purpose.

[0051] In some embodiments, the drying assembly 1 for granular materials further comprises a control system responsible for monitoring and adjusting the temperature, pressure and other parameters in the drying process to ensure that the drying process is carried out under the set conditions, which usually includes temperature sensors, pressure sensors and electrical interlocking devices to prevent misoperation.

[0052] In some embodiments, the drying assembly 1 for granular materials further comprises a condensing system, which is used to collect the evaporated moisture to prevent it from returning to the cylinder 10, and the condenser is usually used with a chilled water unit to provide cooling effect.

[0053] In some embodiments, the drying assembly 1 for granular materials further comprises a sealing system to ensure sealing and prevent gas leakage affecting the vacuum degree.

[0054] The drying assembly 1 for granular materials designed according to the present application can be used as follows: first, set the heating temperature of the drying device, start the drying assembly 1 and enter the running state; start the drying device and start the temperature rise of the drying assembly 1; wait for the temperature to be reached, open the feeding valve, put in the material, wait for the feeding to be completed, close the feeding valve, start the vacuum system and enter the vacuum state; run the dust removal system; start the rotation of the cylinder 10 and enter the drying timing; when the drying is completed, stop the vacuum system and stop the dust removal pulse valve; start the discharging, open the discharging valve; send a signal to the downstream that the material is ready to be discharged, rotate the cylinder 10 and take out the material, when the discharging is completed, close the discharging valve and send a signal to the drying assembly 1 that the operation is completed; stop the rotation of the cylinder 10, stop the drying device and stop the operation of the drying assembly 1.

[0055] When the drying assembly 1 is running, the water tank level detection is started, when the liquid level is lower than the set level, the water tank water supply valve is opened, and when the liquid level is higher than the set level, the water tank water supply valve is delayed closed.

[0056] In summary, the drying assembly 1 for granular materials according to the present application at least integrates the functions of stirring and drying, which is provided with a rotatable cylinder 10, so that the material can be fully dispersed and stirred during the processing process, improving the drying effect, and at the same time, the drying device can meet the requirements of material drying and surface modification between different processes in the production process of granular materials, for example, when the granular material is a mixture of positive electrode material and coating agent, the drying and coating of the positive electrode material can be realized, effectively improving the preparation efficiency of the positive electrode material, which can improve the production capacity while avoiding increasing energy consumption.

[0057] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Also, the specific feature, structure, material or characteristic described can be combined in an appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in the present specification.

[0058] Although the embodiments of the present application have been shown and described above, the above embodiments can be changed, modified, replaced and varied.

Claims

1. A drying assembly (1) for particulate material, characterized in that, The application relates to a processing device for processing materials, which comprises: a base (2); a cylinder (10) rotatably arranged on the base (2), and a processing cavity (10a) formed in the cylinder (10), and a wall of the cylinder (10) further provided with a protruding blade (11), and the cylinder (10) rotates to drive the blade (11) to stir materials in the processing cavity (10a); a drying device arranged on the cylinder (10) and used for heating the materials in the processing cavity (10a).

2. Drying assembly (1) for granular material according to claim 1, characterized in that The drying device comprises: a plurality of heating units (20) arranged on the inner wall (102) of the processing cavity (10a) in a circumferential direction, and the temperature of at least one of the heating units (20) is adjustable.

3. Drying assembly (1) for granular material according to claim 2, characterized in that The wall of the cylinder (10) comprises: an outer wall (101) defining an installation space inside; an inner wall (102) arranged in the installation space and spaced from the outer wall (101) to define an installation gap (10b) in which the drying device is arranged, and the inner wall (102) defines the processing cavity (10a) inside.

4. Drying assembly (1) for granular material according to claim 2, characterized in that The wall of the cylinder (10) is formed with a first matching part, and the heating unit (20) is formed with a second matching part used for connecting with the first matching part, and the first matching part and the second matching part are detachably connected.

5. Drying assembly (1) for granular material according to claim 4, characterized in that The drying device further comprises a plurality of temperature measuring devices corresponding to the plurality of heating units (20), and each temperature measuring device is used for measuring the temperature of the corresponding heating unit (20).

6. Drying assembly (1) for granular material according to claim 1, characterized in that, The blade (11) is configured as a plurality of spiral blades (11) extending along an axis of the cylinder (10) and distributed in a circumferential direction in the processing cavity (10a).

7. Drying assembly (1) for granular material according to claim 6, characterized in that The cylinder (10) is arranged obliquely, and the rotation axis of the cylinder (10) intersects with the direction of gravity.

8. Drying assembly (1) for granular material according to claim 7, characterized in that The cylinder (10) is formed with an inlet and an outlet communicating with the processing cavity (10a), and the cylinder (10) rotates to drive the materials to move from the inlet to the outlet.

9. Drying assembly (1) for granular material according to claim 1, characterized in that Further comprising: a driving device (30) having one end connected with the base (2) and the other end connected with the cylinder (10), and the driving device (30) is adapted to drive the cylinder (10) to rotate relative to the base (2).

10. A drying assembly (1) for granular material according to claim 1, characterized in that, Further comprising: a vacuum device adapted to vacuumize the processing cavity (10a) to provide a vacuum environment for drying the materials.

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