Wet sizing machine for preventing material sticking

Abstract

The utility model relates to material whole particle technology field, concretely relates to a wet whole particle machine of preventing material adhesion, including machine body, driving arrangement and whole particle device, the machine body has the whole particle cavity for accommodating granular material, and the whole particle device sets up in the whole particle cavity and is transmission connection in driving arrangement, is used for whole particle to granular material, the whole particle cavity forms the tubular structure, and its upper and lower ends are used for feeding and discharging respectively, the whole particle device includes spindle, stirring paddle and screen cloth, one end transmission connection in driving arrangement of spindle, the other end is connected in stirring paddle, screen cloth fixed connection in spindle and the screen cloth below stirring paddle, the lateral wall of whole particle cavity is equipped with whole particle cutter, and whole particle cutter is located between stirring paddle and screen cloth, wherein, the surface of stirring paddle is equipped with first hydrophobic nano coating, and the blade of stirring paddle adopts bevel gear staggered line design, thereby, solved the problem that the wet whole particle machine of prior art is prone to material adhesion.

Description

Technical Field

[0001] This utility model relates to the field of material granulation technology, specifically a wet granulator that prevents material adhesion. Background Technology

[0002] In the production processes of pharmaceuticals, food, and chemicals, granulation is a common and crucial step. Wet granulators, as the core equipment for this process, are widely used to prepare moist powdery materials into granules that meet specific requirements. Traditional wet granulators, such as some horizontal structures, typically operate by using a motor-driven agitator to rotate within the cylinder, stirring, mixing, and extruding the input moist powder. Under the combined action of centrifugal force and mechanical propulsion generated by the agitator, the material is forced through a screen with a specific aperture, thus being cut and shaped into relatively uniform granules, which are then discharged through the outlet.

[0003] However, existing wet granulators commonly suffer from severe material adhesion issues inside the equipment during practical applications. Due to the requirements of the granulation process, the material itself needs to have a certain level of moisture content. Additionally, some material formulations contain natural or added adhesive components. The combination of these two factors causes the material to easily adhere to the surfaces of critical equipment components during processing. Specifically, adhesion mainly occurs in the following areas: the surface of the agitator blades, the inner wall of the cylinder, the mesh openings of the screen and its receiving surface, and the inner wall of the discharge hood.

[0004] Material adhesion negatively impacts production efficiency, especially the accumulation of material on the inner wall of the complex and confined discharge hood, which is difficult to remove online using conventional methods. Operators typically need to stop the machine and disassemble the entire discharge hood before cleaning, a process that is not only cumbersome but also significantly reduces the effective operating time of the equipment, forcing a slowdown in the entire production line and severely restricting the overall granulation speed. More seriously, material adhesion poses a potential threat to the quality of the final product. Material that adheres to and accumulates in the dead corners of the equipment for extended periods may undergo physical or chemical changes, or even deteriorate, due to exposure to air or prolonged contact with the metal surfaces of the equipment. This deteriorated, stale material may detach and mix into new batches of qualified products during subsequent production, causing cross-contamination and severely affecting the purity, consistency, and uniformity of the product composition. In addition, the adhesion and accumulation of materials on the screen mesh will quickly lead to mesh blockage. This not only increases the resistance and slows down the material passing through the screen, but also deteriorates the granulation effect, widens the particle size distribution of the formed particles, makes it difficult to guarantee particle uniformity, and the final product may not meet the predetermined production standards.

[0005] To address the aforementioned material adhesion problem, several solutions have been implemented. For example, some equipment has undergone structural improvements, adding scrapers fixed inside the cylinder to remove material adhering to the inner wall during the rotation of the agitator. However, these improvements have significant limitations. For agitators with complex structures (such as blades with curved or angular surfaces) and screens with fine mesh, fixed scrapers struggle to achieve effective adhesion and cleaning; the adhesion problem remains prominent and has not been fundamentally resolved.

[0006] Therefore, existing wet granulators are prone to material adhesion problems, and there is an urgent need for a new structural design that can more comprehensively and effectively reduce the adhesion of materials to the surfaces of various components inside the equipment (especially the mixing paddle, screen and discharge hood), thereby improving production efficiency and product quality. Utility Model Content

[0007] The purpose of this invention is to provide a wet granulator that prevents material adhesion, thereby solving the problem of material adhesion that easily occurs in existing wet granulators.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A wet granulator for preventing material adhesion includes a machine body, a drive unit, and a granulating device. The machine body has a granulation chamber for receiving particulate material. The granulating device is disposed in the granulation chamber and drivenly connected to the drive unit for granulating the particulate material. The granulation chamber is formed into a cylindrical structure, with its upper and lower ends for feeding and discharging, respectively. The granulating device includes a main shaft, a stirring paddle, and a screen. One end of the main shaft is drivenly connected to the drive unit, and the other end is connected to the stirring paddle. The screen is fixedly connected to the main shaft and is located below the stirring paddle. A granulating blade is provided on the side wall of the granulation chamber, and the granulating blade is located between the stirring paddle and the screen. The surface of the stirring paddle is provided with a first hydrophobic nano-coating, and the blades of the stirring paddle adopt an oblique tooth staggered pattern design.

[0010] Alternatively, the wet granulator may further include an air blowing device, which includes a fan and an airflow duct connected thereto. The top of the granulation chamber is provided with a mounting hole adapted to the airflow duct. The airflow duct is sealed and inserted into the mounting hole and extends into the granulation chamber, and is located above the agitator. The airflow duct is provided with a plurality of air nozzles facing the agitator.

[0011] Alternatively, the airflow duct includes a connecting air pipe and a horizontal ring pipe, with the two ends of the connecting air pipe connected to the fan and the horizontal ring pipe respectively, and the horizontal ring pipe connected to the end cover of the machine body via a bracket; the air nozzle is an adjustable angle universal air nozzle.

[0012] Alternatively, the granulating blade is installed obliquely on the inner wall of the granulation chamber and located between the stirring paddle and the screen; wherein the angle of inclination of the granulating blade relative to the horizontal direction is 45°-60°.

[0013] Optionally, the machine body is provided with a feeding device communicating with the granulation chamber. The feeding device includes a feeding hopper, a feeding pipe and a vibrator. The feeding hopper is located at the top of the feeding pipe, and the feeding pipe extends into the granulation chamber. The vibrator is located on the feeding pipe to cause the material to fall through its mechanical vibration.

[0014] Alternatively, the wet granulator may further include a discharge device comprising a discharge hopper and a conveyor, the discharge hopper being sealed to the machine body and the conveyor being located below the discharge hopper;

[0015] The discharge hopper surface is provided with a second hydrophobic nano-coating, which is a polytetrafluoroethylene nano-coating with a thickness of 0.1-0.3 mm.

[0016] Optionally, the discharge hopper is equipped with a control valve to control the discharge speed and flow rate of the material; the control valve is a butterfly valve.

[0017] Optionally, the first hydrophobic nanocoating is a polytetrafluoroethylene coating with a thickness of 0.1-0.3 mm.

[0018] The granulation chamber is provided with an observation window on its side wall.

[0019] Optionally, the main shaft is provided with a heating device for heating the screen; the heating device is detachably connected to the main shaft.

[0020] Alternatively, the wet granulator may further include a controller and a detector, the detector being used to detect temperature and / or pressure information within the granulation chamber; the controller being communicatively connected to the detector and the drive device to control the motion state of the drive device accordingly based on the temperature and / or pressure information within the granulation chamber.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] Through the above technical solution, the first hydrophobic nano-coating provides passive non-stick physical properties, while the oblique toothed texture design creates an active non-stick environment by altering fluid dynamics. The two work synergistically to reduce the amount of wet material adhering to the agitator, enabling the equipment to maintain high-efficiency agitation for a longer period and reducing efficiency loss due to adhesion. Simultaneously, post-batch cleaning becomes extremely simple, eliminating the need for heavy scrapers or frequent disassembly, saving cleaning time, and improving equipment utilization and the speed of the entire production line.

[0023] Minimal material adhesion to the agitator eliminates the risk of old or deteriorated material contaminating new batches, ensuring product purity and consistency. The agitator's efficient, non-adhesive operation ensures continuous and uniform material transport and dispersion. Combined with the precise crushing by the granulator blades, material passes through the screen at a more uniform state and speed, ultimately producing a product with a more concentrated particle size distribution and more stable quality. Effective material adhesion to the agitator reduces operating resistance caused by uneven agitator load or accumulated material, resulting in smoother equipment operation. Simultaneously, this indirectly reduces localized material buildup pressure on the screen, lowering the risk of screen clogging, ensuring the continuity and stability of the granulation process, and minimizing unplanned downtime. The nano-coating also protects the agitator, reducing wear and corrosion and extending its service life. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the exemplary embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0025] Figure 1 A cross-sectional view of a wet granulator for preventing material adhesion provided by this utility model in one embodiment;

[0026] Figure 2 A schematic diagram of the internal structure of the wet granulator for preventing material adhesion provided by this utility model;

[0027] Figure 3 A schematic diagram of the air blowing device in a wet granulator for preventing material adhesion provided by this utility model;

[0028] Figure 4 This is a schematic diagram of the feeding device in a wet granulator for preventing material adhesion, as provided by this utility model.

[0029] The attached diagram shows the following parts and their corresponding names: 1-Machine body, 11-Pelletizing chamber, 12-End cover, 2-Drive device, 3-Pelletizing device, 31-Main shaft, 32-Agitator, 33-Screen, 4-Pelletizing knife, 5-Air blowing device, 51-Airflow pipe, 511-Connecting air pipe, 512-Horizontal ring pipe, 52-Air nozzle, 53-Support, 6-Feeding device, 61-Feeding hopper, 62-Feeding pipe, 63-Vibrator, 7-Discharge hopper, 8-Heating device. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that while the description of these embodiments is intended to aid in understanding the present invention, it does not constitute a limitation thereof. The specific structural and functional details disclosed herein are only for describing exemplary embodiments of the present invention. However, the present invention may be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0031] According to specific embodiments of this disclosure, a wet granulator is provided to prevent material adhesion. Wherein, Figures 1 to 4 Specific embodiments thereof are shown.

[0032] See Figures 1 to 4 As shown, the wet granulator for preventing material adhesion includes a machine body 1, a drive unit 2, and a granulating device 3. The machine body 1 has a granulation chamber 11 for containing particulate material. The granulating device 3 is disposed in the granulation chamber 11 and is driven to the drive unit 2 for granulating the particulate material. The granulation chamber 11 is formed into a cylindrical structure, with its upper and lower ends for feeding and discharging, respectively. The granulating device 3 includes a main shaft 31, a stirring paddle 32, and a screen 33. One end of the main shaft 31 is driven to the drive unit 2, and the other end is connected to the stirring paddle 32. The screen 33 is fixedly connected to the main shaft 31 and is located below the stirring paddle 32. A granulating blade 4 is provided on the side wall of the granulation chamber 11, and the granulating blade 4 is located between the stirring paddle 32 and the screen 33. The surface of the stirring paddle 32 is provided with a first hydrophobic nano-coating, and the blades of the stirring paddle 32 adopt an oblique tooth interlaced pattern design.

[0033] The working process of the wet granulator that prevents material adhesion is as follows: The pre-mixed wet powdery material enters the cylindrical granulation chamber 11 from the feed port at the top of the granulation chamber 11. Subsequently, the drive device 2 is started, and the power is transmitted to the granulation device 3 through the main shaft 31, which drives the stirring paddle 32 and the screen 33 fixedly connected to it to rotate at high speed.

[0034] The high-speed rotating impeller 32 exerts a strong mechanical force on the material. The staggered toothed pattern of the impeller 32, during rotation, disrupts the stable flow field of the material, generating multi-directional irregular eddies and shear forces. This breaks up and mixes wet material clumps, preventing the formation of a stable adhesion layer on the impeller surface. Simultaneously, the first hydrophobic nano-coating on the impeller 32, due to its extremely low surface energy, makes the adhesion force between the wet material and the impeller surface much smaller than the material's own cohesive force, making it difficult for the material to adhere firmly to the impeller. In this situation, even with minimal contact, it is more easily peeled off under the impact of centrifugal force and the material flow. As the material is driven downwards by the impeller 32, the granulating blade 4, fixed to the sidewall of the granulation chamber 11, generates a strong relative motion with the high-speed material flow and the impeller 32, effectively cutting and breaking up larger clumps that have not yet been dispersed.

[0035] After thorough mixing and crushing, the material is thrown towards the periphery of the granulation chamber 11 under centrifugal force. At this point, the screen 33, located below and rotating at high speed between the agitator 32, performs final granulation. Particles meeting the target particle size pass through the screen 33 openings under centrifugal force, becoming qualified products; while particles not meeting the requirements remain above the screen 33, continuing to be subjected to the agitator 32 and granulation blades 4 until they can pass through the screen 33. The qualified particles passing through the screen 33 collect downwards along the inner wall of the cylindrical granulation chamber 11 under gravity, and are finally discharged smoothly from the outlet at its lower end, completing the entire granulation process.

[0036] Through the above technical solution, the first hydrophobic nano-coating provides passive non-stick physical properties, while the staggered toothed texture design creates an active non-stick environment by altering fluid dynamics. The two work synergistically to reduce the amount of wet material adhering to the agitator 32, enabling the equipment to maintain high-efficiency agitation for a longer period and reducing efficiency loss due to adhesion. Simultaneously, post-batch cleaning becomes extremely simple, eliminating the need for heavy scrapers or frequent disassembly, saving cleaning time, and improving equipment utilization and the speed of the entire production line.

[0037] Minimal material adhesion to the agitator 32 avoids the risk of old or deteriorated material contaminating the new batch, ensuring product purity and consistency. The efficient, non-adhesive operation of the agitator 32 ensures continuous and uniform material transport and dispersion. Combined with the precise crushing of the granulator blade 4, the material passes through the screen 33 in a more uniform state and at a faster speed, ultimately producing a product with a more concentrated particle size distribution and more stable quality. Effective material adhesion to the agitator 32 reduces operating resistance caused by uneven load on the agitator 32 or the accumulation of adhering substances, resulting in smoother equipment operation. Simultaneously, this indirectly reduces localized material buildup pressure on the screen 33, lowering the risk of screen clogging, ensuring the continuity and stability of the granulation process, and reducing unplanned downtime. The nano-coating also reduces wear and corrosion of the agitator 32, extending its service life.

[0038] It should be noted that directional terms such as "inner" and "outer" refer to "inner" and "outer" relative to the outline of the component. "Inner" refers to the direction towards the inside of the component, and "outer" refers to the direction away from it. Furthermore, terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Moreover, in the following descriptions with accompanying drawings, the same reference numerals in different drawings represent the same element. The phrase "and / or" in the text refers to A and / or B, indicating that there are three possible scenarios: only A, only B, and both A and B. The phrase " / and" in the text refers to A and B, indicating that there are two possible scenarios: only A and both A and B.

[0039] In one embodiment provided in this disclosure, the wet granulator further includes an air blowing device 5, which includes a fan and an airflow duct 51 connected thereto. The top of the granulation chamber 11 is provided with a mounting hole adapted to the airflow duct 51. The airflow duct 51 is sealed and inserted into the mounting hole and extends into the granulation chamber 11, and is located above the stirring paddle 32. The airflow duct 51 is provided with a plurality of air nozzles 52 facing the stirring paddle 32.

[0040] The air blowing device 5 generates compressed airflow through a blower and delivers it through an airflow pipe 51. Finally, it is directionally ejected from multiple air nozzles 52 located above the agitator 32, thereby physically cleaning the surface of the agitator 32. The airflow impact can effectively blow off wet materials that are adhering to or about to adhere to the agitator blade surface, especially in complex structures such as the interlaced grooves of the agitator 32, where the airflow can enter blind spots of mechanical cleaning, thereby reducing material residue on the agitator 32.

[0041] In addition, the continuous airflow can break up any localized agglomeration or eddies that may form in the material due to humidity, resulting in a more uniform distribution of the material within the cavity. This improves mixing efficiency and allows the material to move more smoothly and evenly towards the screen 33, promoting the stability of the granulation process and the uniformity of the granulated product. Furthermore, the airflow blowing towards the mixing paddle 32 can also provide some assistance to the area of ​​the screen 33 below, dispersing fine powder accumulated on the surface of the screen 33 and reducing the tendency for the screen 33 mesh to become clogged, thereby ensuring the continuity of the granulation process and the efficiency of the discharge.

[0042] Specifically, the airflow duct 51 includes a connecting air pipe 511 and a horizontal ring pipe 512. The two ends of the connecting air pipe 511 are respectively connected to the fan and the horizontal ring pipe 512. The horizontal ring pipe 512 is connected to the end cover 12 of the body 1 through the bracket 53. The air nozzle 52 is an adjustable angle universal air nozzle 52.

[0043] The airflow duct 51 is connected to the ventilation fan via the connecting air pipe 511, providing a smooth and low-resistance delivery channel for the airflow and ensuring the efficiency and stability of the airflow to the granulation chamber 11. Its horizontal ring pipe 512 is fixed to the end cap 12 of the machine body 1 by the bracket 53, making the installation of the piping system more stable and effectively suppressing pipe displacement or loosening caused by vibration during equipment operation, thus improving the reliability and safety of operation. The horizontal ring pipe 512 allows multiple air nozzles 52 to be arranged along the axial direction of the agitator 32, thereby achieving a wider and more uniform blowing coverage of the agitator 32 surface.

[0044] In this disclosure, the nozzle 52 is an adjustable-angle universal nozzle 52. This allows for flexible adjustment of the spray angle and direction of each nozzle 52 according to actual production needs, such as for materials of different viscosities or observed real-time adhesion. This enables the airflow to be precisely guided to critical areas with the highest adhesion risk or where adhesion has already occurred, such as the back of the agitator blades 32, or the grooves of the oblique tooth pattern—complex areas where conventional airflow is difficult to effectively reach—achieving precise and efficient targeted cleaning.

[0045] In one embodiment provided in this disclosure, the granulator 4 is installed obliquely on the inner wall of the granulation chamber 11 and is located between the stirring paddle 32 and the screen 33; wherein the granulator 4 is inclined at an angle of 45°-60° relative to the horizontal direction.

[0046] When facing material driven and falling by the upper stirring paddle 32, the inclined sizing blade 4 forms a more effective guiding and shearing surface. Compared with the vertically installed sizing blade 4, the inclined blade can more smoothly guide the material to the periphery and lower part of the sizing chamber 11, reducing the frontal impact and accumulation of material on the blade surface, thereby effectively reducing the risk of material adhesion to the surface of the sizing blade 4 itself. When the high-speed rotating material flow impacts the inclined blade surface, the force is decomposed into an impact force perpendicular to the blade surface and a shear force parallel to the blade surface. This combined force state makes the crushing efficiency of large particles or agglomerated materials higher, relying not only on impact but also benefiting from strong shearing action, which can more easily tear and disperse moist clumps, thereby producing particles with more uniform particle size.

[0047] Based on the 445°-60° tilt angle design of the granulator blade 4, the material, after being dropped downward by the agitator 32 and contacting the tilted granulator blade 4, can be effectively guided and accelerated through the working area between it and the screen 33. This avoids the formation of a stagnant area between the agitator 32 and the screen 33, allowing the crushed material to spread quickly and evenly across the entire surface of the screen 33. This improves the effective utilization rate of the screen 33 and the discharge efficiency of the granulation process, while also alleviating the problem of screen 33 clogging caused by local accumulation of material.

[0048] In one embodiment provided in this disclosure, the machine body 1 is provided with a feeding device 6 communicating with the granulation chamber 11. The feeding device 6 includes a feeding hopper 61, a feeding pipe 62 and a vibrator 63. The feeding hopper 61 is disposed at the top of the feeding pipe 62, and the feeding pipe 62 extends into the granulation chamber 11. The vibrator 63 is disposed on the feeding pipe 62 to cause the material to fall through its mechanical vibration.

[0049] The mechanical vibration generated by vibrator 63 is transmitted to feed pipe 62, causing high-frequency micro-amplitude vibration of the pipe wall. This effectively breaks down the adhesion between the wet material and the pipe wall, preventing material from adhering to the inner wall of feed pipe 62 or forming "arch"-like blockages, thus ensuring the continuity of material feeding. Simultaneously, the vibration makes the material entering from feed hopper 61 more fluffy, reducing local accumulation at the outlet, thereby achieving stable and uniform feeding. The uniform material flow provides a stable working load for the mixing paddle 32 and granulator 4, avoiding load fluctuations in the granulation chamber 11 caused by inconsistent feeding amounts. This makes the mixing and crushing process smoother, facilitating the formation of uniformly sized granules, and also helps protect the drive unit 2, reducing equipment impact caused by sudden load changes.

[0050] In one embodiment of this disclosure, the wet granulator further includes a discharge device comprising a discharge hopper 7 and a conveyor. The discharge hopper 7 is sealed to the machine body 1, and the conveyor is located below the discharge hopper 7. This effectively prevents dust from escaping during the final collection stage of the granulated material, maintains a clean working environment, avoids unnecessary material loss, and ensures product yield. Simultaneously, the sealed environment isolates external contaminants, ensuring that the product remains uncontaminated during the discharge process.

[0051] After being granulated, the material is collected by the discharge hopper 7 and can fall smoothly to the conveyor below (such as a belt conveyor) and be automatically transported to the next process (such as a dryer or packaging machine), which improves the automation and continuity of the entire production line and increases the overall production efficiency.

[0052] Preferably, the surface of the discharge hopper 7 is provided with a second hydrophobic nano-coating, which is a polytetrafluoroethylene (PTFE) nano-coating with a thickness of 0.1-0.3 mm. The extremely low surface energy of the PTFE nano-coating makes it an excellent hydrophobic and non-stick barrier. When particulate material falls from the discharge port into the discharge hopper 7, the coating weakens the adhesion between the material and the hopper wall, ensuring that the material can smoothly and quickly slide down to the conveyor below under its own weight, achieving seamless transport from the pelletizing chamber 11 to the downstream equipment. If material adheres to the inner wall of the discharge hopper 7, it will not only cause a loss in the current batch's output, but these residues may also detach in subsequent batches, leading to cross-contamination between different batches. The excellent chemical stability and non-stick properties of the PTFE coating make the discharge hopper 7 easy and quick to clean, even possessing a self-cleaning effect, thereby eliminating the risk of contamination caused by equipment residue and ensuring the purity and quality stability of each batch of product.

[0053] Furthermore, the discharge hopper 7 is equipped with a control valve to control the discharge speed and flow rate of the material; the control valve is a butterfly valve. The valve plate rotation mechanism of the butterfly valve allows the operator to steplessly change the cross-sectional area of ​​the discharge channel through simple angle adjustment, thereby precisely controlling the material outflow rate. This enables the equipment to flexibly match the most suitable feeding speed according to the processing capacity of downstream processes (such as dryers or packaging machines), ensuring the coordinated, continuous and stable operation of the entire production line, and avoiding problems such as downstream equipment blockage due to excessively fast discharge or overall efficiency impact due to excessively slow discharge.

[0054] When it is necessary to change product batches or perform equipment maintenance, the butterfly valve can be completely closed, making the discharge hopper 7 a reliable sealed isolation. This not only effectively prevents cross-contamination between different batches of materials, but also avoids contact between the internal and external environments of the equipment, maintaining the airtightness and hygiene standards of the production system, especially in line with the production process specifications of industries such as pharmaceuticals and food.

[0055] In one embodiment of this disclosure, the first hydrophobic nanocoating is a polytetrafluoroethylene (PTFE) coating with a thickness of 0.1-0.3 mm. The excellent hydrophobicity and non-stick properties of PTFE provide an excellent passive anti-sticking foundation for the impeller 32. When wet material comes into contact with the surface of the impeller 32 coated with this layer, the adhesion between them is weakened, becoming much less than the material's own cohesive force. This makes it difficult for the material to adhere to the impeller surface and allows it to be more easily thrown off under centrifugal force and gravity, reducing the amount of material adhering to the impeller 32, a key working component, improving mixing efficiency, and reducing the risk of material waste and cross-contamination caused by adhesion.

[0056] A coating thickness of 0.1-0.3 mm forms a complete, dense, and uniform protective layer, effectively covering the substrate surface of the impeller 32 (including the complex interlaced oblique tooth pattern), ensuring its low surface energy characteristics are fully utilized. Simultaneously, this thickness avoids the negative effects of excessively thick coatings, such as decreased adhesion due to differences in thermal expansion coefficients, easy peeling, or affecting the dimensional accuracy of the impeller 32 due to excessive coating thickness. Therefore, this thickness range achieves the optimal balance between ensuring a durable, stable anti-stick effect and maintaining the mechanical reliability of the coating and the precision of the components.

[0057] In one embodiment of this disclosure, the side wall of the granulation chamber 11 is provided with an observation window. This observation window provides a visual monitoring channel, allowing operators to intuitively grasp the real-time operating conditions inside the granulation chamber 11, including but not limited to the mixing uniformity of materials, the working status of the stirring paddle 32, the material passage on the surface of the screen 33, and whether any abnormal adhesion or blockage occurs. This enables operators to adjust key process parameters such as the feed rate and the rotation speed of the stirring paddle 32 in a timely and precise manner based on real-time observation, achieving proactive optimization and fine control of the production process.

[0058] In this disclosure, a heating device 8 for heating the screen 33 is provided on the main shaft 31; the heating device 8 is detachably connected to the main shaft 31. By heating the screen 33, the temperature of the screen 33 can be increased, reducing the stickiness of the material on the screen 33, preventing the screen 33 from clogging, ensuring the smooth progress of the granulation process, and the detachable design facilitates the cleaning and maintenance of the heating components and the screen 33.

[0059] Specifically, the heating device 8 can be configured as an electric heating wire heating sleeve, an electromagnetic induction heater, or an infrared heater, as is available in the prior art. Those skilled in the art can flexibly select commercially available heating elements based on the technical concept of this disclosure. As for the connection method of the heating device 8, any suitable method such as screws, pins, snap-fits, or sleeves can be selected, and this disclosure does not impose any restrictions on this.

[0060] In one embodiment provided in this disclosure, the wet granulator further includes a controller and a detector. The detector is used to detect temperature and / or pressure information in the granulation chamber 11. The controller is communicatively connected to the detector and the drive device 2 to control the movement state of the drive device 2 according to the temperature and / or pressure information in the granulation chamber 11.

[0061] During the operation of the pelletizer, detectors (such as temperature sensors and pressure sensors) monitor key physical parameters (temperature and / or pressure) within the pelletizing chamber 11 in real time and continuously transmit this data to the controller. The controller has preset temperature and pressure thresholds corresponding to the ideal process range. When the received data deviates from the preset range, the controller immediately generates control commands. For example, if the temperature inside the chamber rises abnormally (which may indicate increased material friction or localized adhesion leading to overheating), or the pressure increases abnormally (which may indicate blockage of the screen 33 or poor material flow), the controller will adjust the frequency of the motor to correspondingly change the output speed of the drive device 2, thereby adjusting the movement state of the stirring paddle 32 and achieving dynamic and precise control of the working conditions within the pelletizing chamber 11.

[0062] This transforms the granulation process from relying on manual experience and judgment to automated control based on objective data. By maintaining a stable temperature and pressure environment within the granulation chamber 11, problems such as uneven particle size and changes in material properties (e.g., denaturation or melting due to overheating) caused by fluctuations in process parameters are effectively avoided, improving the stability and uniformity between product batches and ensuring high-quality product output.

[0063] In this disclosure, the shredder also includes a terminal. Specifically, the terminal is configured as a laptop computer, tablet computer, mobile phone, or other device with input capabilities to read and control the working status. Those skilled in the art can configure it flexibly according to actual needs, and this disclosure does not impose any limitations on this.

[0064] In this disclosure, the controller is configured as a central processing unit (CPU). Furthermore, the controller is integrated into the terminal. Of course, in other embodiments, the controller may also be configured as a PLC logic controller and located elsewhere besides the terminal.

[0065] Alternatively, the controller can be configured as a digital signal processor (DSP), an application-specific integrated circuit (ASIC), or a field-programmable gate array (FPGA).

[0066] In this disclosure, the controller is communicatively connected to the drive device (system) and various sensors via cables. In other embodiments, the controller may also be connected to the sensors via wireless communication modules such as Wi-Fi or ZigBee modules. Those skilled in the art can flexibly configure the controller based on the technical concept of this disclosure.

[0067] Additionally, it should be noted that the drive device (configured in this disclosure as an electric motor, hydraulic motor, or a combination of an electric motor and a belt drive structure (chain drive structure)), heating device, fan, sensor, and controller are all prior art. Those skilled in the art can make conventional improvements to the above-mentioned equipment or components based on the technical concept of this disclosure, and this disclosure does not impose any restrictions on this.

[0068] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A wet granulator for preventing material adhesion, comprising a machine body, a drive unit, and a granulating device, wherein the machine body has a granulating chamber for receiving particulate material, and the granulating device is disposed in the granulating chamber and drivenly connected to the drive unit for granulating the particulate material; characterized in that, The granulation chamber is formed into a cylindrical structure, with its upper and lower ends used for feeding and discharging, respectively. The granulation device includes a main shaft, a stirring paddle, and a screen. One end of the main shaft is connected to the drive device, and the other end is connected to the stirring paddle. The screen is fixedly connected to the main shaft and is located below the stirring paddle. The side wall of the granulation chamber is provided with a granulation blade, which is located between the stirring paddle and the screen. The surface of the stirring paddle is provided with a first hydrophobic nano-coating, and the blades of the stirring paddle adopt an oblique tooth pattern design.

2. The wet granulator for preventing material adhesion according to claim 1, characterized in that, The wet granulator also includes an air blowing device, which includes a fan and an airflow pipe connected thereto. The top of the granulation chamber is provided with a mounting hole adapted to the airflow pipe. The airflow pipe is sealed in the mounting hole and extends into the granulation chamber and is located above the agitator. The airflow pipe is provided with a plurality of air nozzles facing the agitator.

3. The wet granulator for preventing material adhesion according to claim 2, characterized in that, The airflow duct includes a connecting air pipe and a horizontal ring pipe. The two ends of the connecting air pipe are respectively connected to the fan and the horizontal ring pipe. The horizontal ring pipe is connected to the end cover of the machine body through a bracket. The air nozzle is an adjustable angle universal air nozzle.

4. The wet granulator for preventing material adhesion according to claim 1, characterized in that, The granulating blade is installed at an angle on the inner wall of the granulation chamber and is located between the stirring paddle and the screen; wherein the angle of inclination of the granulating blade relative to the horizontal direction is 45°-60°.

5. The wet granulator for preventing material adhesion according to claim 1, characterized in that, The machine body is provided with a feeding device connected to the granulation chamber. The feeding device includes a feeding hopper, a feeding pipe and a vibrator. The feeding hopper is located at the top of the feeding pipe, and the feeding pipe extends into the granulation chamber. The vibrator is located on the feeding pipe to cause the material to fall through its mechanical vibration.

6. The wet granulator for preventing material adhesion according to claim 1, characterized in that, The wet granulator also includes a discharge device, which includes a discharge hopper and a conveyor. The discharge hopper is sealed to the machine body, and the conveyor is located below the discharge hopper. The discharge hopper surface is provided with a second hydrophobic nano-coating, which is a polytetrafluoroethylene nano-coating with a thickness of 0.1-0.3 mm.

7. The wet granulator for preventing material adhesion according to claim 6, characterized in that, The discharge hopper is equipped with a control valve to control the discharge speed and flow rate of the material; the control valve is a butterfly valve.

8. The wet granulator for preventing material adhesion according to claim 1, characterized in that, The first hydrophobic nano-coating is a polytetrafluoroethylene coating; its thickness is 0.1-0.3 mm. The granulation chamber is provided with an observation window on its side wall.

9. The wet granulator for preventing material adhesion according to claim 1, characterized in that, The main shaft is equipped with a heating device for heating the screen; the heating device is detachably connected to the main shaft.

10. The wet granulator for preventing material adhesion according to claim 1, characterized in that, The wet granulator also includes a controller and a detector. The detector is used to detect temperature and / or pressure information inside the granulation chamber. The controller is communicatively connected to the detector and the drive device to control the movement state of the drive device according to the temperature and / or pressure information inside the granulation chamber.

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