Polyvinylidene fluoride powder drying device

Abstract

The present application relates to the field of drying equipment, specifically is a kind of polyvinylidene fluoride powder drying device, including cylinder frame, the lower part of cylinder frame is provided with the refinement mechanism for scattering material, the upper portion of refinement mechanism is provided with feed ring, the upper portion of feed ring is provided with drying mechanism, the present application adopts oblique knife plate to the material falling back towards cylinder frame axis direction's gathering force and upward lifting force, to actively re-orient material in the central region of drying chamber;Meanwhile, through the guide ring of fixed connection in the outer end of oblique knife plate, material can be effectively intercepted and bounced back to the center of drying chamber along the lower side of oblique knife plate outward movement, reduce the opportunity of material and drying chamber inner wall contact;Adopt high-speed rotating drying chamber, effectively prevent material from accumulating on its inner wall, and through material moving assembly, material is actively bounced and centripetal pushed to the inner wall of drying chamber due to accident, further reduce the adhesion and accumulation of material on the inner wall of drying chamber.

Description

Technical Field

[0001] This invention relates to the field of drying equipment, specifically a drying device for polyvinylidene fluoride powder. Background Technology

[0002] Polyvinylidene fluoride (PVDF) is a high-performance thermoplastic fluoropolymer. Industrially, PVDF powder is processed into finished products through polymerization, washing, centrifugal dehydration, and drying. Currently, rotary flash dryers are widely used as the mainstream equipment for drying wet PVDF materials.

[0003] The existing rotary flash dryer mainly consists of a drying chamber, a main shaft crushing blade, a hot air distributor, a classifier, and a feeding and discharging system. During operation, highly viscous wet materials are fed into the bottom of the drying chamber through a screw feeder. The materials meet the hot air entering at high speed from the bottom. The main shaft drives the horizontally arranged crushing blades at the bottom to rotate at high speed, breaking up the wet materials and throwing them into the hot air flow. The materials are rapidly dried by the hot air during the rotation and rise process. Dehydration is completed in the upper part of the drying chamber. After being screened by the top classifier, qualified fine powder is discharged and collected, while coarse particles are intercepted and fall back to continue drying.

[0004] However, when processing wet polyvinylidene fluoride (PVDF) material, due to its high viscosity and moisture content, the wet particles formed after being broken up are thrown towards the inner wall of the drying chamber by centrifugal force in the high-speed rotating airflow. Once in contact, the material easily adheres to the inner wall of the drying chamber. Moreover, the inner wall of the traditional drying chamber is a fixed structure, lacking mechanical means to actively intervene in the movement of the material. After the material adheres to the wall, it cannot be peeled off or guided back to the central drying area in time, gradually accumulating to form a material layer. This not only reduces drying efficiency and affects product quality, but in severe cases, it also requires shutdown for cleaning, which greatly restricts the continuity of production. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a polyvinylidene fluoride powder drying device, including a cylinder frame, a refining mechanism for dispersing the material is provided at the lower part of the cylinder frame, a feeding ring is provided at the upper part of the refining mechanism, and a drying mechanism is provided at the upper part of the feeding ring.

[0006] The refining mechanism includes a sealing bowl fixedly installed on the lower inner side of the cylinder frame. A main cutter disc is rotatably arranged inside the sealing bowl. Several oblique cutter plates are fixedly installed at equal intervals along the circumference of the main cutter disc. A guide ring is fixedly installed at the outer end of the oblique cutter plates. An air outlet ring is fixedly installed inside the sealing bowl.

[0007] The feed ring is sealed and fixedly connected to the upper side of the air outlet ring.

[0008] The main cutter head, the inclined cutter plate, and the guide ring rotate synchronously, causing the material that falls from the inclined cutter plate and the guide ring to bounce back to the axis of the cylinder frame.

[0009] The drying mechanism includes a drying chamber that is rotatably connected to the feed ring, with the outer side of the drying chamber in rolling contact with the cylinder frame. The inner side of the drying chamber is provided with a material transfer assembly for rebounding and pushing the material. The drying mechanism also includes a rotating assembly for driving the drying chamber.

[0010] Preferably, the inner end of the inclined blade is fixedly connected to the main blade disc, and the inclined blade is arranged in a gradually increasing manner from the inside to the outside.

[0011] Preferably, the guide ring has a conical structure with a small inner diameter at the top and a large inner diameter at the bottom, and the outer end of the inclined blade has a through groove that runs vertically through it.

[0012] Preferably, the left side of the sealing bowl extends outside the cylinder frame and is connected to the hot air generator, and hot air is blown into the drying chamber from bottom to top through the sealing bowl.

[0013] Preferably, the right side of the air outlet ring extends to the outside of the cylinder frame and is connected to the hot air generator. The air outlet ring has a hollow structure, and several ventilation holes are opened on the upper part of the inner side of the air outlet ring.

[0014] Preferably, the inner side of the cylinder frame is rotatably connected to several limiting rollers via a support arm, and the limiting rollers all roll against the outer side of the drying chamber.

[0015] Preferably, the material transfer assembly includes several spiral plates fixedly installed on the lower side of the drying chamber, with the spiral plates arranged at equal intervals along the circumference of the drying chamber.

[0016] Preferably, the material transfer assembly further includes several helical toothed plates fixedly installed on the lower side of the drying chamber, with the helical toothed plates located between two adjacent helical plates.

[0017] Preferably, the helical toothed plate is composed of several wedge-shaped blocks on the side near the axis of the drying chamber. The wedge-shaped surfaces of the wedge-shaped blocks have a streamlined structure and face the rotation direction of the drying chamber.

[0018] Preferably, the rotating assembly includes a synchronous motor fixedly mounted on the upper side of the drum frame, and the synchronous motor drives the drying chamber to rotate through a belt drive structure.

[0019] The beneficial effects of this invention are as follows: First, this invention uses an inclined blade to apply a gathering force and an upward lifting force towards the axis of the drum frame to the falling material, thereby actively guiding the material back to the central area of ​​the drying chamber; at the same time, through the guide ring fixedly connected to the outer end of the inclined blade, the material moving outward along the lower side of the inclined blade can be effectively intercepted and rebounded back to the center of the drying chamber, reducing the chance of the material contacting the inner wall of the drying chamber; the use of a high-speed rotating drying chamber effectively prevents the material from accumulating on its inner wall, and through the material transfer component, the material that is accidentally thrown towards the inner wall of the drying chamber is actively rebounded and centripetally pushed, further reducing the adhesion and accumulation of the material on the inner wall of the drying chamber.

[0020] Second, this invention uses a slanted blade that rotates at high speed synchronously with the main blade disc to assist in breaking up large pieces of wet material. Since the multiple slanted blades are arranged in an inclined manner that gradually increases in height from the inside to the outside, a cone-shaped breaking up area that is wider at the top and narrower at the bottom is formed when the slanted blades rotate at high speed. This structure can effectively cut large pieces of highly viscous wet material falling from above, and effectively bounce these materials towards the center of the drying chamber at the moment of contact, effectively preventing these large pieces of wet material from splashing and adhering to the inner wall of the drying chamber.

[0021] Third, the present invention uses a spiral plate in the material transfer assembly to form a structure that continuously pushes downwards. Through this pushing structure, the material flying towards the inner wall of the drying chamber can be continuously guided downwards and pushed to the area where the main cutter disc is located, thereby further reducing the continuous accumulation of material on the inner wall of the drying chamber.

[0022] Fourth, the present invention uses a spiral toothed plate in the material transfer assembly to actively push a portion of the material flying towards the inner wall of the drying chamber back to the central area of ​​the drying chamber; and because the wedge-shaped surface of the wedge block has a streamlined structure, it can generate a relatively gentle force when pushing the material back, effectively guiding the material back to the central area of ​​the drying chamber and preventing it from sticking to the wall, while effectively mitigating the unnecessary breakage caused by excessive impact on the material during this process. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a partial cross-sectional view of the present invention;

[0026] Figure 3 This is a partial cross-sectional view of the cylinder frame, drying chamber, sealing bowl, and guide ring in this invention;

[0027] Figure 4 This is a schematic diagram of the structure of the main cutter head, the inclined cutter plate, and the guide ring in this invention;

[0028] Figure 5 This is a partial cross-sectional view of the drying chamber and the material transfer assembly in this invention;

[0029] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle.

[0030] In the diagram: 1. Cylinder frame; 2. Refining mechanism; 3. Feeding ring; 4. Drying mechanism; 11. Limiting roller; 21. Sealing bowl; 22. Main cutter disc; 23. Inclined cutter plate; 24. Guide ring; 25. Exhaust ring; 41. Drying chamber; 42. Material transfer assembly; 43. Rotating assembly; 421. Spiral plate; 422. Spiral toothed plate; 431. Synchronous motor; 432. Belt drive structure. Detailed Implementation

[0031] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0032] See Figure 1 and Figure 2 A drying device for polyvinylidene fluoride powder includes a cylinder frame 1, a refining mechanism 2 for dispersing the material is provided at the lower part of the cylinder frame 1, a feeding ring 3 is provided at the upper part of the refining mechanism 2, and a drying mechanism 4 is provided at the upper part of the feeding ring 3.

[0033] When drying polyvinylidene fluoride powder, the material is fed into the refining mechanism 2 through the feed ring 3. The material first comes into contact with the refining mechanism 2 under the action of gravity and is dispersed by the refining mechanism 2. Then, the refining mechanism 2 blows these dispersed materials from bottom to top. During this process, the material that meets the particle size standard is blown upward and discharged. The large pieces of material that do not meet the particle size standard fall back to contact the refining mechanism 2 under the action of gravity. Then, the refining mechanism 2 disperses the material again and guides the material to the center position of the axis of the cylinder 1 to prevent the material from adhering and accumulating on the wall surface.

[0034] During the process of the refining mechanism 2 blowing the material upward, the material is blown to the drying mechanism 4 for drying, thereby drying the polyvinylidene fluoride powder. During the drying process, the drying mechanism 4 can further reduce the material adhering to the wall surface of the drying mechanism 4.

[0035] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The refining mechanism 2 includes a sealing bowl 21 fixedly installed on the lower inner side of the cylinder frame 1. The left side of the sealing bowl 21 extends to the outside of the cylinder frame 1 and is connected to the hot air generator. Hot air is blown into the drying chamber 41 from bottom to top through the sealing bowl 21. A main cutter disc 22 is rotatably installed inside the sealing bowl 21. Several inclined blades 23 are fixedly installed at equal intervals along the circumference of the main cutter disc 22. A guide ring 24 is fixedly installed at the outer end of the inclined blades 23. An air outlet ring 25 is sealed and fixedly installed inside the sealing bowl 21. The feed ring 3 is sealed and fixedly connected to the upper side of the air outlet ring 25.

[0036] In this embodiment, a screw-guided material structure is installed on the feed ring 3. This screw-guided material structure adopts a mature technical solution in the prior art. When drying polyvinylidene fluoride powder, the operator places the polyvinylidene fluoride powder to be dried at the feed end of the feed ring 3. Then, the polyvinylidene fluoride powder is continuously conveyed to the inner side of the feed ring 3 through the screw-guided material structure. After that, these materials fall onto the main cutter disc 22 and the inclined cutter plate 23 under the action of gravity.

[0037] During drying, the main cutter disc 22 rotates at high speed, which drives the inclined blade 23 and guide ring 24 to rotate synchronously. The material in contact with the high-speed rotating main cutter disc 22 and inclined blade 23 is broken up and shredded. Then, the hot air flow blowing from bottom to top blows these broken materials upward. On the one hand, the hot air dries these broken materials, and on the other hand, the rising air flow blows away materials with particle size that meet the standard.

[0038] The remaining materials that do not meet the standard particle size fall back to contact the main cutter disc 22 and the inclined cutter plate 23 due to their greater gravity. These falling materials are effectively bounced towards the central area of ​​the drying chamber 41 at the moment of contact with the inclined cutter plate 23, effectively preventing these large pieces of wet material from accumulating on the inner wall.

[0039] A portion of the falling material passes through the inclined blade 23 and comes into contact with the main blade disc 22. Then, this falling material is dispersed again and blown upward. If this upward-blown material is blocked by the lower side of the inclined blade 23, it will move outward along the inclined surface of the lower side of the inclined blade 23. The guide ring 24 at the outer end of the inclined blade 23 effectively intercepts this material and guides it back to the center position, reducing the chance of the material contacting the wall.

[0040] In this embodiment, a drive motor is fixedly installed on the lower side of the sealing bowl 21. The output shaft of the drive motor is fixedly connected to the main cutter disc 22. When drying materials, the drive motor drives the main cutter disc 22 to rotate at high speed.

[0041] See Figure 1 , Figure 2 , Figure 3 and Figure 5 The drying mechanism 4 includes a drying chamber 41 that is rotatably connected to the feed ring 3. The outer side of the drying chamber 41 is in rolling contact with the cylinder frame 1. The inner side of the drying chamber 41 is provided with a material transfer assembly 42 for rebounding and pushing the material. The drying mechanism 4 also includes a rotating assembly 43 for driving the drying chamber 41.

[0042] When drying materials, the drying chamber 41 is rotated at high speed by the rotating component 43 to prevent the materials blown into the drying chamber 41 by hot air from accumulating and adhering to the wall surface of the drying chamber 41, thus further preventing material accumulation. While the drying chamber 41 is rotating, the material transfer component 42 is rotated synchronously, so that the material transfer component 42 actively rebounds and centripetally pushes the materials that are accidentally thrown towards the inner wall of the drying chamber 41, further reducing the adhesion and accumulation of materials on the inner wall of the drying chamber 41.

[0043] It is worth noting that the rotation direction of the drying chamber 41 is the same as that of the main cutter disc 22, and the rotation speed of the drying chamber 41 is slightly greater than that of the main cutter disc 22. The rotation speeds of both have been determined through repeated experiments by those skilled in the art, so that the material moving at a speed less than that of the main cutter disc 22 is stirred by the main cutter disc 22. On the one hand, there is a relative speed between the material transfer component 42 and the material, which can prevent the material from adhering to the inner wall of the drying chamber 41. On the other hand, the contact force between the material transfer component 42 and the material is appropriate, which prevents the material from being over-crushed.

[0044] To enable the inclined blade 23 to assist the main blade disc 22 in breaking up the material and to guide the broken-up material to the axial region of the drying chamber 41, the present invention designs the following structure: (See attached diagram) Figure 3 and Figure 4 The inner end of the inclined blade 23 is fixedly connected to the main blade disc 22. The inclined blade 23 is arranged in a gradually increasing manner from the inside to the outside. Because the multiple inclined blades 23 are arranged in an inclined manner from the inside to the outside, a cone-shaped dispersing area with a wider top and a narrower bottom is formed when the inclined blades 23 rotate at high speed. This structure can effectively cut large pieces of highly viscous wet materials falling from above, and effectively bounce these materials to the center area of ​​the drying chamber 41 at the moment of contact with the materials, effectively preventing these large pieces of wet materials from splashing and adhering to the inner wall of the drying chamber 41.

[0045] To more quickly guide the material trapped by the guide ring 24 to the axial region of the drying chamber 41, the present invention designs the following structure: (See attached diagram) Figure 4 The guide ring 24 has a conical structure with a small inner diameter at the top and a large inner diameter at the bottom. The outer end of the inclined blade plate 23 is provided with a material passage groove that runs through the top and bottom. The material trapped on the guide ring 24 passes through the material passage groove under the push of the rising airflow, so that the material is guided to the position of the axis area of ​​the drying chamber 41.

[0046] To ensure smooth rotation of the drying chamber 41, the present invention designs the following structure: (See attached diagram) Figure 2 The inner side of the cylinder frame 1 is rotatably connected to several limiting rollers 11 via a support arm. The limiting rollers 11 all roll against the outer side of the drying chamber 41. The limiting rollers 11 support the drying chamber 41, so that the high-speed rotating drying chamber 41 is maintained in the coaxial position of the cylinder frame 1.

[0047] In order to enable the high-speed rotation of the drying chamber 41, the present invention designs the following structure: (See attached diagram) Figure 2 and Figure 3 The rotating assembly 43 includes a synchronous motor 431 fixedly mounted on the upper side of the cylinder frame 1. The synchronous motor 431 drives the drying chamber 41 to rotate through the belt drive structure 432, thereby driving the drying chamber 41 to rotate at high speed.

[0048] The belt drive structure 432 in this embodiment includes a driven pulley fixedly installed on the outside of the drying chamber 41, a driving pulley fixedly installed on the output shaft of the synchronous motor 431, and a belt wound around the outside of the driven pulley and the driving pulley.

[0049] In order to forcefully push down the material that accidentally flies onto the inner wall of the drying chamber 41 onto the main cutter disc 22, the present invention designs the following structure: (See attached diagram) Figure 5 and Figure 6 The material transfer assembly 42 includes several spiral plates 421 fixedly installed on the lower inner side of the drying chamber 41, and the spiral plates 421 are arranged at equal intervals along the circumference of the drying chamber 41.

[0050] When the drying chamber 41 rotates at high speed, the spiral plate 421 on it rotates synchronously, so that the spiral plate 421 forms a structure that continuously pushes downward. Through this pushing structure, the material flying towards the inner wall of the drying chamber 41 can be continuously guided downward and pushed to the area where the main cutter disc 22 is located, thereby further reducing the continuous accumulation of material on the inner wall of the drying chamber 41.

[0051] To prevent the material pushed downwards by the spiral plate 421 from adhering to the inner wall of the drying chamber 41, the present invention designs the following structure: (See attached diagram) Figure 2 and Figure 3 The right side of the exhaust ring 25 extends to the outside of the cylinder frame 1 and is connected to the hot air generator. The exhaust ring 25 has a hollow structure, and several ventilation holes are opened on the upper part of the inner side of the exhaust ring 25.

[0052] During drying, hot air is introduced into the air outlet ring 25 through a hot air generator, and this hot air is blown out through the vent holes, thereby blowing the material pushed downward by the spiral plate 421 to the area where the main cutter disc 22 is located.

[0053] In order to actively push back a portion of the material flying towards the inner wall of the drying chamber 41 back to the central area of ​​the drying chamber 41, the present invention designs the following structure: (See attached diagram) Figure 5 and Figure 6The material transfer assembly 42 also includes several spiral toothed plates 422 fixedly installed on the lower inner side of the drying chamber 41. The spiral toothed plates 422 are located between two adjacent spiral plates 421. The side of the spiral toothed plate 422 near the axis of the drying chamber 41 is composed of several wedge-shaped blocks. The wedge-shaped surface of the wedge-shaped block has a streamlined structure and faces the rotation direction of the drying chamber 41.

[0054] The drying chamber 41 drives the spiral toothed plate 422 to rotate synchronously at high speed, so that the streamlined wedge-shaped surface of the wedge block comes into contact with the material flying towards the inner wall of the drying chamber 41. Since the relative speed between the spiral toothed plate 422 and the material is not large, and due to the streamlined wedge-shaped surface of the wedge block, the spiral toothed plate 422 can generate a relatively gentle force when pushing the material back. This effectively guides the material back to the central area of ​​the drying chamber 41 and prevents it from sticking to the wall, while also effectively mitigating the unnecessary breakage caused by excessive impact on the material during this process.

[0055] Although this invention adds components such as a sealing bowl 21, an inclined blade plate 23, a guide ring 24, and an actively rotating drying chamber 41 to the traditional rotary flash drying structure, slightly increasing the initial investment cost in the early stages of equipment manufacturing, the synergistic effect of these structures actively rebounds and pushes the falling and splashed material back to the central hot air drying area of ​​the drying chamber 41. This reduces the adhesion and accumulation of high-viscosity polyvinylidene fluoride wet material on the inner wall of the drying chamber 41, thereby reducing production interruptions and manual maintenance costs caused by periodic shutdowns to clean the accumulated material on the walls. It significantly improves the continuous operation cycle and production efficiency of the equipment. Therefore, the comprehensive economic benefits brought by this invention in significantly reducing operating and maintenance costs, improving product quality, and increasing continuous production efficiency far outweigh the slight increase in its initial cost, and it has high practical value.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0057] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A drying device for polyvinylidene fluoride powder, comprising a drum frame, characterized in that, The lower part of the cylinder frame is equipped with a refining mechanism for dispersing materials, the upper part of the refining mechanism is equipped with a feeding ring, and the upper part of the feeding ring is equipped with a drying mechanism. The refining mechanism includes a sealing bowl fixedly installed on the lower inner side of the cylinder frame. A main cutter disc is rotatably arranged inside the sealing bowl. Several oblique cutter plates are fixedly installed at equal intervals along the circumference of the main cutter disc. A guide ring is fixedly installed at the outer end of the oblique cutter plates. An air outlet ring is sealed and fixedly installed inside the sealing bowl. The feed ring is sealed and fixedly connected to the upper side of the air outlet ring; The main cutter head, the inclined cutter plate, and the guide ring rotate synchronously, causing the inclined cutter plate and the guide ring to rebound the falling material to the position of the cylinder axis; The drying mechanism includes a drying chamber that is rotatably connected to the feed ring, the outer side of the drying chamber is in rolling contact with the cylinder frame, the inner side of the drying chamber is provided with a material transfer component for rebounding and pushing the material, and the drying mechanism also includes a rotating component for driving the drying chamber. The inner end of the inclined blade is fixedly connected to the main blade disc, and the inclined blade is arranged in a gradually increasing height from the inside to the outside. The guide ring has a conical structure with a small inner diameter at the top and a large inner diameter at the bottom, and the outer end of the inclined blade has a through groove that runs from top to bottom.

2. The polyvinylidene fluoride powder drying device according to claim 1, characterized in that, The left side of the sealing bowl extends outside the cylinder frame and is connected to the hot air generator. Hot air is blown into the drying chamber from bottom to top through the sealing bowl.

3. The polyvinylidene fluoride powder drying device according to claim 1, characterized in that, The right side of the air outlet ring extends to the outside of the cylinder frame and is connected to the hot air generator. The air outlet ring has a hollow structure, and several ventilation holes are opened on the upper part of the inner side of the air outlet ring.

4. The polyvinylidene fluoride powder drying device according to claim 1, characterized in that, The inner side of the cylinder frame is rotatably connected to several limiting rollers via a support arm, and the limiting rollers all roll against the outer side of the drying chamber.

5. The polyvinylidene fluoride powder drying device according to claim 1, characterized in that, The material transfer assembly includes several spiral plates fixedly installed on the lower side of the drying chamber, with the spiral plates arranged at equal intervals along the circumference of the drying chamber.

6. The polyvinylidene fluoride powder drying device according to claim 5, characterized in that, The material transfer assembly also includes several helical toothed plates fixedly installed on the lower side of the drying chamber, with the helical toothed plates located between two adjacent helical plates.

7. The polyvinylidene fluoride powder drying device according to claim 6, characterized in that, The spiral toothed plate is composed of several wedge-shaped blocks on the side near the axis of the drying chamber. The wedge-shaped surfaces of the wedge-shaped blocks have a streamlined structure and face the rotation direction of the drying chamber.

8. The polyvinylidene fluoride powder drying device according to claim 1, characterized in that, The rotating assembly includes a synchronous motor fixedly mounted on the upper side of the drum frame, which drives the drying chamber to rotate via a belt drive structure.

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