A powder drying system

Abstract

This utility model discloses a powder drying system, including: an oven, a vibration device, an ultrasonic device, and a hot air device. The oven has an inlet and an outlet connecting to its internal space. The vibration device is located inside the oven and divides the internal space into an upper space and a lower space. The inlet connects to the upper space, and the outlet connects to the lower space. At least one ultrasonic device is located inside the oven and is used to disperse the powder raw materials entering the upper space from the inlet. The hot air device is used to dry the powder raw materials entering the lower space. The vibration and ultrasonic devices prevent raw material accumulation through vibration and ultrasonic vibration, ensuring uniform drying, effectively preventing powder agglomeration, increasing the contact area between the powder and the hot air, and improving drying efficiency and quality. The hot air device precisely dries the dispersed powder raw materials, ensuring the stability and reliability of the drying effect.

Description

Technical Field

[0001] This utility model relates to the field of powder drying technology, and in particular to a powder drying system. Background Technology

[0002] In prepreg production, powdered raw materials such as toughening agents and curing agents required for the formulation resin are highly hygroscopic, easily agglomerating during transportation and storage. To meet subsequent production needs, these powdered raw materials need to be dried. Currently, the common method is to manually bag and feed them into a dryer. However, existing dryers face significant challenges: the moisture-absorbing, agglomerated powder is difficult to disperse and cannot effectively pass through the vibrating screen, resulting in a low yield of qualified powder after drying. To ensure production, it is necessary to rely on manual dispersing of agglomerated materials, which not only consumes a large amount of manpower but also severely restricts production efficiency and increases production costs. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a powder drying system.

[0004] This utility model provides a powder drying system, the powder drying system comprising:

[0005] An oven, wherein the oven is provided with an inlet and an outlet that communicate with the internal space of the oven;

[0006] A vibration device is installed inside the oven, dividing the internal space of the oven into an upper space and a lower space. The feed inlet is connected to the upper space, and the discharge outlet is connected to the lower space.

[0007] At least one ultrasonic device is disposed inside the oven, and the at least one ultrasonic device is used to disperse the powdered raw material entering the upper space from the feed inlet.

[0008] A hot air device is used to dry the powdered raw materials entering the lower space.

[0009] In some embodiments of this disclosure, at least one of the ultrasonic devices is located at the top of the oven, the feed inlet is located at the side of the oven, and the discharge outlet is located at the bottom of the oven.

[0010] In some embodiments of this disclosure, the bottom of the oven is provided with an auxiliary discharge component communicating with the lower space. The auxiliary discharge component includes a first pipe section and a second pipe section. The first end of the first pipe section is connected to the lower space, and the second end of the first pipe section is connected to the first end of the second pipe section. The second end of the second pipe section constitutes the discharge port. Along the discharge direction, the inner diameter of the first pipe section gradually decreases, and the inner diameter of the port of the second end of the first pipe section is the same as the inner diameter of the port of the second pipe section.

[0011] In some embodiments of this disclosure, the vibration device includes:

[0012] A vibrating screen plate is disposed inside the oven, and the outer edge of the vibrating screen plate is attached to the inner side wall of the oven.

[0013] The driving component is fixed to the outer wall of the oven, and the output end of the driving component is connected to the vibrating screen plate.

[0014] In some embodiments of this disclosure, the hot air device includes:

[0015] Blower;

[0016] An air supply duct, the first end of which is connected to the air outlet of the blower, and the second end of which is connected to the lower space.

[0017] A heating element is disposed inside the air supply duct, and the heating element is used to heat the airflow passing through the air supply duct.

[0018] In some embodiments of this disclosure, the heating element is at least one of electric heating, infrared heating, electromagnetic wave heating, gas heating, oil heating, and water heating.

[0019] In some embodiments of this disclosure, the powder drying system further includes:

[0020] A baffle is disposed inside the oven. The baffle includes a first edge and a second edge disposed opposite to each other. The first edge of the baffle is connected to the lower edge of the feed inlet, and the baffle gradually tilts towards the vibrating device from the first edge to the second edge.

[0021] In some embodiments of this disclosure, the powder drying system further includes:

[0022] A separation device, connected to the upper space, is used to extract powdered raw materials remaining in the upper space.

[0023] In some embodiments of this disclosure, the separation device includes:

[0024] Exhaust fan;

[0025] A cyclone separator, wherein the inlet of the cyclone separator is connected to the upper space, and the outlet of the cyclone separator is connected to the air intake of the induced draft fan.

[0026] In some embodiments of this disclosure, the powder drying system further includes:

[0027] A water-based dust removal device, wherein the inlet of the water-based dust removal device is connected to the outlet of the cyclone separator, and the outlet of the water-based dust removal device is connected to the suction port of the induced draft fan.

[0028] The powder drying system provided by this utility model has at least the following advantages:

[0029] The powder drying system provided by this utility model divides the internal space of the drying oven into upper and lower spaces using a vibration device. This ensures the powder raw materials are layered in an orderly manner, moving along a set path. Furthermore, the vibration prevents material accumulation, ensuring uniform drying. An ultrasonic device disperses the powder raw materials in the upper space, effectively preventing clumping and increasing the contact area between the powder and hot air, thus improving drying efficiency and quality. Meanwhile, a hot air device precisely dries the dispersed powder raw materials in the lower space. The continuous action of the hot air ensures sufficient moisture evaporation, achieving the ideal drying effect. This system automates, increases efficiency, and refines the powder drying process, ensuring the stability and reliability of the drying effect, meeting the high-quality requirements of industrial production for powder drying, and saving production costs. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of a powder drying system provided for an exemplary embodiment of the present invention.

[0032] The following labels are shown in the attached diagram:

[0033] 1. Oven; 101. Feed inlet; 102. Discharge outlet; 103. Upper space; 104. Lower space; 110. Baffle;

[0034] 2. Vibration device; 201. Vibrating screen plate; 202. Driving component;

[0035] 3. Ultrasonic device;

[0036] 4. Hot air device; 401. Blower; 402. Air duct; 403. Heating element;

[0037] 5. Auxiliary discharge components; 501. First pipe section; 502. Second pipe section;

[0038] 6. Separation device; 601. Exhaust fan; 602. Cyclone separator; 603. Water dust removal equipment. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0040] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] In the production of prepregs, the formulated resin requires various powdered raw materials such as toughening agents and curing agents. These powders are prone to absorbing moisture, leading to clumping during transportation or storage. To meet subsequent production needs, the powdered raw materials need to be dried. This is often done manually by bagging the materials and feeding them into a dryer. However, existing dryers face significant challenges: the moisture-absorbing, clumped powder is difficult to disperse and cannot effectively pass through the vibrating screen, resulting in a low yield of qualified powder after drying. To ensure production, it is necessary to rely on manual labor to break up the clumps, which not only consumes a large amount of manpower but also severely restricts production efficiency and increases production costs.

[0042] To address the aforementioned technical problems, this utility model provides a powder drying system. A vibration device divides the internal space of the drying oven into upper and lower spaces. This ensures the powder raw materials are layered in an orderly manner, guaranteeing their movement along a predetermined path. Furthermore, the vibration prevents material accumulation, ensuring uniform drying. An ultrasonic device disperses the powder raw materials in the upper space, effectively preventing clumping and increasing the contact area between the powder and hot air, thus improving drying efficiency and quality. Meanwhile, a hot air device precisely dries the dispersed powder raw materials in the lower space. The continuous action of the hot air ensures sufficient moisture evaporation, achieving the desired drying effect. This system automates, increases efficiency, and refines the powder drying process, ensuring the stability and reliability of the drying effect, meeting the high-quality requirements of industrial production for powder drying, and saving production costs.

[0043] The following is combined with Figure 1 The embodiments of this utility model are further described below.

[0044] An exemplary embodiment of this disclosure provides a powder drying system, such as... Figure 1As shown, the powder drying system includes: an oven 1, a vibration device 2, at least one ultrasonic device 3, and a hot air device 4. The oven 1 has an inlet 101 and an outlet 102 connecting its internal space. The vibration device 2 is located inside the oven 1, dividing its internal space into an upper space 103 and a lower space 104. The inlet 101 connects to the upper space 103, and the outlet 102 connects to the lower space 104. Thus, the vibration device 2 divides the oven 1 into upper and lower spaces, forming a layered processing mode. The powder in the upper space 103 is dispersed by ultrasonic waves and then evenly falls into the lower space 104 through the vibration of the vibrating screen plate 201. The hot air device 4 in the lower space 104 specifically dries the powder, significantly improving production efficiency. At least one ultrasonic device 3 is located inside the oven 1 and is used to disperse the powder raw materials entering the upper space 103 from the inlet 101. Thus, the ultrasonic device 3 is positioned in the upper space 103 of the drying oven 1. Utilizing the cavitation effect generated by high-frequency vibration, it can instantly break down the agglomerated structure of the powder raw materials, dispersing large powder particles into uniform fine particles. This significantly increases the contact area between the powder and hot air during the subsequent drying process, effectively avoiding insufficient drying caused by localized accumulation and laying the foundation for efficient drying. The hot air device 4 is used to dry the powder raw materials entering the lower space 104. This ensures that the powder is heated evenly throughout the drying process. Ultrasonic dispersion avoids uneven particle size, the vibrating screen plate 201 ensures uniform powder distribution, and the hot air device 4 guarantees a stable temperature field, thereby effectively controlling the moisture content and particle size distribution of the powder. The continuous action of the hot air ensures sufficient evaporation of moisture, achieving the ideal drying effect. This realizes the automation, efficiency, and refinement of the powder drying process, ensuring the stability and reliability of the drying effect, meeting the high-quality requirements of industrial production for powder drying, and saving production costs.

[0045] In some embodiments of this utility model, reference is made to Figure 1 At least one ultrasonic device 3 is located at the top of the drying oven 1, the feed inlet 101 is located on the side of the drying oven 1, and the discharge outlet 102 is located at the bottom of the drying oven 1. Multiple ultrasonic devices 3 can be arranged in an array at the top of the drying oven 1, covering the entire upper space 103. High-frequency vibration weakens the inter-particle forces, preventing agglomeration and improving the uniformity and thoroughness of powder dispersion. Simultaneously, placing the feed inlet 101 on the side of the drying oven 1 physically isolates it from the top ultrasonic devices 3, preventing interference between the powder and the ultrasonic devices and thus extending equipment life and improving system reliability. Furthermore, the discharge outlet 102 is located at the bottom, allowing gravity to accelerate discharge, improving discharge smoothness, reducing residue, and thus increasing the efficiency of powder drying.

[0046] In some embodiments of this utility model, reference is made to Figure 1 The bottom of the drying oven 1 is equipped with an auxiliary discharge component 5 that connects to the lower space 104. The auxiliary discharge component 5 includes a first pipe section 501 and a second pipe section 502. The first end of the first pipe section 501 is connected to the lower space 104, and the second end of the first pipe section 501 is connected to the first end of the second pipe section 502. A flexible sealing joint can be provided at the connection between the first pipe section 501 and the second pipe section 502 to ensure the sealing of the connection and allow a certain angle of deflection, which is convenient for fine-tuning during equipment installation and maintenance. The second end of the second pipe section 502 forms the discharge port 102. Along the discharge direction, the inner diameter of the first pipe section 501 gradually decreases, and the inner diameter of the port of the second end of the first pipe section 501 is the same as the inner diameter of the port of the second pipe section 502. It can be understood that the first pipe section 501 adopts a tapered variable diameter structure. Of course, in other embodiments, an electromagnetic vibrator can be provided on the outer surface of the first pipe section 501. The high-frequency vibration generated by the electromagnetic vibrator can further enhance the flowability of the powder, allowing it to pass smoothly through the first pipe section 501. Thus, the auxiliary discharge component 5 adopts a segmented pipe section that can be quickly disassembled, making it easy to clean residual powder. At the same time, the first pipe section 501 adopts a tapered variable diameter structure with a gradually decreasing inner diameter, which can accelerate the flow rate of powder raw materials, effectively avoid accumulation caused by long-term stagnation, improve the smoothness of discharge, reduce residue, and thus improve the efficiency of powder drying.

[0047] In some embodiments of this utility model, reference is made to Figure 1 The vibration device 2 includes a vibrating screen plate 201 and a driving component 202. The vibrating screen plate 201 is disposed inside the oven 1, and the outer edge of the vibrating screen plate 201 is attached to the inner side wall of the oven 1. Exemplarily, the vibrating screen plate 201 can adopt a double-layer composite structure, with the upper layer being a 316L stainless steel screen with a mirror-polished surface to reduce powder adhesion; the lower layer is a high-elasticity polyurethane buffer layer to provide a cushioning and shock absorption effect. The upper stainless steel screen can be replaced with a screen of different mesh sizes according to the type of powder to adapt to powder raw materials of different particle sizes. At the same time, a thermally conductive silicone heating wire can be embedded inside the screen plate, and the temperature of the screen plate can be controlled by a temperature controller to further dry the powder raw materials. The driving component 202 is fixed to the outer side wall of the oven 1, and the output end of the driving component 202 is connected to the vibrating screen plate 201. For example, the drive component 202 can be a variable frequency electromagnetic vibrator, which drives the vibrating screen plate 201. The power is automatically adjusted according to the actual load, resulting in significant energy savings. This reduces rework and waste caused by uneven dispersion and agglomeration, improves the utilization rate of powder raw materials, and further reduces production costs and resource consumption. In other embodiments, a composite structure of rubber damping pads and spring dampers can be installed between the drive component 202 and the outer wall of the oven 1 to effectively reduce vibration transmission to the main body of the oven 1 and surrounding equipment, thereby reducing the risk of equipment resonance.

[0048] In some embodiments of this utility model, reference is made to Figure 1 The hot air device 4 includes a blower 401, an air duct 402, and a heating element 403. The first end of the air duct 402 is connected to the outlet of the blower 401, and the second end is connected to the lower space 104. The heating element 403 is disposed inside the air duct 402 and is used to heat the airflow passing through the air duct 402. For example, by installing a temperature sensor at the outlet of the air duct 402 or inside the oven 1, the hot air temperature and the drying environment temperature inside the lower space 104 can be monitored in real time and fed back to the control system, automatically adjusting the power of the heating element 403 to control the temperature within a suitable range. In other embodiments, an insulation layer, such as aluminum silicate fiber cotton or polyurethane foam, can be installed on the outside of the air duct 402 to effectively block heat exchange between the hot air inside the duct and the external environment, ensuring drying efficiency. The blower 401 provides a stable airflow, which, after being heated by the heating element 403, is delivered to the lower space 104 of the drying oven 1 through the air supply duct 402. The hot air can quickly and extensively contact the powder raw materials, accelerating moisture evaporation. Hot air drying significantly shortens the drying time of the powder raw materials, greatly improving production efficiency and meeting the needs of large-scale industrial production. The heating element 403 is located inside the air supply duct 402, allowing for precise heating of the flowing air.

[0049] In some embodiments of this utility model, reference is made to Figure 1 The heating element 403 employs at least one of the following heating methods: electric heating, infrared heating, electromagnetic wave heating, gas heating, oil heating, and water heating. It is understood that the heating element 403 can utilize one of these methods, or a combination of multiple methods. Different heating methods can be selected based on the properties of different powder raw materials to improve drying efficiency, reduce energy consumption, and save production costs.

[0050] In some embodiments of this utility model, reference is made to Figure 1The powder drying system also includes a baffle 110. The baffle 110 is disposed inside the drying oven 1 and includes a first edge and a second edge disposed opposite to each other. The first edge of the baffle 110 is connected to the lower edge of the feed inlet 101, and the baffle 110 gradually tilts towards the vibrating device 2 from the first edge to the second edge. For example, the baffle 110 can be made of stainless steel with a mirror-polished surface to reduce the adhesion between the powder raw material and the baffle 110. The first edge of the baffle 110 can be directly and firmly connected to the lower edge structure of the feed inlet 101 of the drying oven 1 by welding, bolting, or other reliable fixing methods. The baffle 110 gradually tilts towards the vibrating device 2 from the first edge to the second edge, meaning the surface of the baffle 110 forms a downward slope from the first edge to the second edge, ensuring that the powder raw material can slide directly and smoothly from the baffle 110 onto the vibrating screen plate 201. This reduces the chance of powdered raw materials falling freely and scattering in the upper space 103 of the oven 1, effectively suppressing dust flying during the dispersal process, reducing material loss, and also reducing the pressure on cleaning the inside of the oven 1.

[0051] In some embodiments of this utility model, reference is made to Figure 1 The powder drying system also includes a separation device 6. The separation device 6 is connected to the upper space 103 and is used to remove residual powder materials from the upper space 103. By setting up the separation device 6, residual powder in the upper space 103 can be recovered, preventing it from accumulating in the corners of the device, thereby improving the utilization rate of raw materials. If residual powder accumulates in the upper space 103 for a long time, it may become contaminated due to moisture absorption and adsorption of impurities. The separation device 6 promptly removes residue, ensuring a clean environment inside the drying oven 1, preventing subsequent powder contamination, maintaining unobstructed space within the drying oven 1, ensuring uniform hot air distribution, and improving drying efficiency and consistency of powder drying.

[0052] In some embodiments of this utility model, reference is made to Figure 1The separation device 6 includes an induced draft fan 601 and a cyclone separator 602. The cyclone separator 602 can be a long conical cyclone separator 602, a cylindrical cyclone separator 602, a diffusion cyclone separator 602, or a bypass cyclone separator 602, etc. The induced draft fan 601 can be a variable frequency speed-regulating induced draft fan 601 or a permanent magnet synchronous motor, etc. The inlet of the cyclone separator 602 is connected to the upper space 103, and the outlet of the cyclone separator 602 is connected to the suction port of the induced draft fan 601. The cyclone separator 602 can significantly reduce the amount of residual powder in the upper space 103, preventing the powder from circulating in the oven 1 and preventing impurities from mixing into the powder being dried, thus ensuring stable product quality. The blower 601 provides a stable negative pressure suction to maintain the continuous operation of the entire separation device 6, ensuring that the residual powder in the upper space 103 of the oven 1 can be sucked out in time, avoiding the accumulation of powder from affecting drying efficiency or clogging the pipes.

[0053] In some embodiments of this utility model, reference is made to Figure 1 The powder drying system also includes a water dust removal device 603. The inlet of the water dust removal device 603 is connected to the outlet of the cyclone separator 602, and the outlet of the water dust removal device 603 is connected to the suction port of the induced draft fan 601. Although the cyclone separator 602 can separate most of the larger powder particles, some fine dust will still remain in the airflow. The water dust removal device 603 utilizes the full contact between water and dust, through inertial collision, interception, and diffusion, to capture the fine dust again, further improving dust removal efficiency. In the airflow that has not been treated by water dust removal, fine dust will cause wear to the impeller, bearings, and other components of the induced draft fan 601. Long-term operation may lead to impeller imbalance, increased vibration, and even equipment failure. The water dust removal device 603 removes dust in advance, significantly reducing the dust content in the airflow entering the induced draft fan 601, reducing dust erosion of the induced draft fan 601, extending its service life, avoiding frequent downtime and maintenance due to induced draft fan 601 failure, improving the stability of the production line operation, and ensuring production efficiency.

[0054] The above-described contents can be implemented individually or in combination in various ways, and all such variations are within the protection scope of this utility model.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A powder drying system, characterized in that, The powder drying system includes: An oven, wherein the oven is provided with an inlet and an outlet that communicate with the internal space of the oven; A vibration device is installed inside the oven, dividing the internal space of the oven into an upper space and a lower space. The feed inlet is connected to the upper space, and the discharge outlet is connected to the lower space. At least one ultrasonic device is disposed inside the oven, and the at least one ultrasonic device is used to disperse the powdered raw material entering the upper space from the feed inlet. A hot air device is used to dry the powdered raw materials entering the lower space.

2. The powder drying system according to claim 1, characterized in that, At least one of the ultrasonic devices is located at the top of the oven, the feed inlet is located at the side of the oven, and the discharge outlet is located at the bottom of the oven.

3. The powder drying system according to claim 2, characterized in that, The bottom of the oven is provided with an auxiliary discharge component that connects to the lower space. The auxiliary discharge component includes a first pipe section and a second pipe section. The first end of the first pipe section is connected to the lower space, and the second end of the first pipe section is connected to the first end of the second pipe section. The second end of the second pipe section forms the discharge port. Along the discharge direction, the inner diameter of the first pipe section gradually decreases, and the inner diameter of the port of the second end of the first pipe section is the same as the inner diameter of the port of the second pipe section.

4. The powder drying system according to claim 1, characterized in that, The vibration device includes: A vibrating screen plate is disposed inside the oven, and the outer edge of the vibrating screen plate is attached to the inner side wall of the oven. The driving component is fixed to the outer wall of the oven, and the output end of the driving component is connected to the vibrating screen plate.

5. The powder drying system according to claim 1, characterized in that, The hot air device includes: Blower; An air supply duct, the first end of which is connected to the air outlet of the blower, and the second end of which is connected to the lower space. A heating element is disposed inside the air supply duct, and the heating element is used to heat the airflow passing through the air supply duct.

6. The powder drying system according to claim 5, characterized in that, The heating element is selected from at least one of electric heating, infrared heating, electromagnetic wave heating, gas heating, oil heating, and water heating.

7. The powder drying system according to any one of claims 1 to 6, characterized in that, The powder drying system also includes: A baffle is disposed inside the oven. The baffle includes a first edge and a second edge disposed opposite to each other. The first edge of the baffle is connected to the lower edge of the feed inlet, and the baffle gradually tilts towards the vibrating device from the first edge to the second edge.

8. The powder drying system according to any one of claims 1 to 6, characterized in that, The powder drying system also includes: A separation device, connected to the upper space, is used to extract powdered raw materials remaining in the upper space.

9. The powder drying system according to claim 8, characterized in that, The separation device includes: Exhaust fan; A cyclone separator, wherein the inlet of the cyclone separator is connected to the upper space, and the outlet of the cyclone separator is connected to the air intake of the induced draft fan.

10. The powder drying system according to claim 9, characterized in that, The powder drying system also includes: A water-based dust removal device, wherein the inlet of the water-based dust removal device is connected to the outlet of the cyclone separator, and the outlet of the water-based dust removal device is connected to the suction port of the induced draft fan.

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