Rotary flash drying device

Abstract

The utility model provides a rotary type flash drying device. The rotary type flash drying device comprises a supporting frame, a vacuum box, a rotary type cage-shaped drying assembly, a transmission mechanism, a vacuum pumping system and a heater. The vacuum box is arranged in the supporting frame, an air exhaust pipeline is arranged at the top of the vacuum box, and the air exhaust pipeline is connected to a vacuum air exhaust system; the rotary cage-shaped drying assembly is arranged in the vacuum box in the horizontal direction and used for bearing materials and rotating under driving of the transmission mechanism. The transmission mechanism is arranged in the supporting frame and located outside the vacuum box, and the transmission mechanism is connected with the rotary cage-shaped drying assembly and used for driving the rotary cage-shaped drying assembly to rotate in the vacuum box. The heater is arranged at the bottom end in the vacuum box. The rotary cage-shaped drying assembly for bearing the materials can be in a rotating state in use, and a dynamic disturbance condition is introduced in the material drying process, so that the drying mode that the materials are stacked in situ and static for a long time is broken, and a better drying effect is achieved.

Description

Technical Field

[0001] This application relates to the field of material drying equipment technology, and in particular to a rotary flash dryer. Background Technology

[0002] In the processing of industrial materials, drying is a crucial step in achieving material dehydration, stable storage, and facilitating subsequent processing, and is widely used in chemical, pharmaceutical, and food industries. To improve drying efficiency, heating is often used to rapidly dehydrate the materials.

[0003] In existing drying equipment, there are two main common material arrangement methods: one is to place the material statically inside the drying chamber and heat it through the heating chamber structure or by conducting heat sources; the other is to use mechanical stirring or a rotary device to continuously agitate the material to enhance heat exchange efficiency. However, the former suffers from uneven heating because the material is always in a static state, with some areas prone to overheating and others to under-drying; while the latter has drawbacks such as complex structure, high power consumption, and susceptibility to mechanical damage to some heat-sensitive materials.

[0004] Therefore, how to achieve appropriate disturbance of materials during the drying process under the premise of reasonable structure, so as to solve the problem of uneven heating caused by static accumulation of materials, has become a key technical problem that urgently needs to be solved in the structural design of current drying equipment. Utility Model Content

[0005] This application provides a rotary flash drying device to solve the problem of uneven heating of materials in existing drying equipment during the drying process, where the materials are in a static state.

[0006] This application provides a rotary flash drying apparatus, including a support frame, a vacuum chamber, a rotary cage-like drying assembly, a transmission mechanism, a vacuum pumping system, and a heater;

[0007] The vacuum chamber is located inside the support frame, and an air extraction pipe is provided on the top of the vacuum chamber, which is connected to the vacuum extraction system.

[0008] The rotary cage drying assembly is arranged horizontally inside the vacuum chamber to carry materials and rotate under the drive of the transmission mechanism.

[0009] The transmission mechanism is located inside the support frame and outside the vacuum chamber. The transmission mechanism is connected to the rotary cage drying assembly and is used to drive the rotary cage drying assembly to rotate inside the vacuum chamber.

[0010] The heater is located at the bottom of the vacuum chamber and is used to provide heat energy to the material in the rotary cage drying assembly under vacuum conditions to achieve drying.

[0011] As an alternative embodiment of this application, the rotary cage drying assembly includes a pair of oppositely arranged annular end frames and a central rotating shaft passing between the two annular end frames;

[0012] The inner ring surface of the circular end frame is uniformly provided with six connecting blocks. Each circular end frame is connected to a connecting rod fixed to the central rotating shaft through the six connecting blocks. A total of six support rods are connected between two circular end frames through two opposing connecting blocks. All six support rods are arranged parallel to the central rotating shaft. The circular end frames, the central rotating shaft, the connecting rods, and the support rods together form a cylindrical cage structure. A feeding disc is rotatably connected to each support rod. The central rotating shaft is connected to the transmission mechanism.

[0013] As an optional embodiment of this application, the feeding tray includes a rectangular tray plate with a recessed placement surface and two triangular connecting frames distributed at both ends of the upper part of the tray plate. The two triangular connecting frames are rotatably connected to the corresponding support rods, and the feeding tray can sway relative to the support rods during the overall rotation of the rotary cage drying assembly.

[0014] As an optional embodiment of this application, the transmission mechanism includes a motor, a reducer, a driving pulley, a driven pulley, and a transmission belt;

[0015] The output shaft of the motor is connected to a drive pulley, which drives a corresponding driven pulley to rotate via a transmission belt. The driven pulley is connected to the input end of a reducer, and the output end of the reducer is connected to a central rotating shaft to drive the rotary cage drying assembly to rotate inside the vacuum chamber.

[0016] As an optional embodiment of this application, the heater is an array of multiple electric heating tubes distributed and installed on the bottom inner wall of the vacuum chamber. The heater is connected to a temperature control device outside the support frame via wires for adjusting the heating temperature.

[0017] As an alternative embodiment of this application, the vacuum pumping system includes a vacuum pump and a filter assembly disposed on the pumping pipe, the filter assembly being used to filter dust generated during the drying process.

[0018] As an alternative embodiment of this application, the vacuum chamber is provided with an inspection door on one side, and the inspection door can be connected to the wall of the vacuum chamber by a hinge.

[0019] As an optional embodiment of this application, the bottom of the support frame is provided with four omnidirectional casters, each of which is equipped with a foot-operated brake structure to enable the movement and positioning of the device.

[0020] Compared with the prior art, this application has the following beneficial effects:

[0021] 1. This application provides a rotary flash drying device, which uses a rotary cage-like drying component installed in a closed cavity. This component is horizontally positioned within a vacuum chamber and is a rotatable structure that rotates continuously under the drive of a transmission mechanism. Unlike traditional static drying methods, this structure keeps the drying component carrying the material in a continuous rotating state, introducing dynamic disturbance conditions during the drying process. This breaks the traditional method of drying materials by simply piling them up in place for a long time, thus laying a structural foundation for achieving uniform heat transfer.

[0022] 2. The rotary cage-shaped drying assembly of this application rotates within a vacuum chamber under the drive of a transmission mechanism. During rotation, the assembly continuously changes the spatial position of the material within the vacuum chamber. This rotary bearing method differs from traditional static structures, enabling the material to move relative to the vacuum chamber during the drying process. This helps reduce the long-term residence of material in a specific location and lowers the risk of localized accumulation. Because the material can be in a more uniform state of movement, its surface can be exposed to the heat source area more frequently, thereby enhancing the efficiency of heat transfer between materials, improving the consistency of the drying process, and reducing the probability of uneven drying or localized overheating.

[0023] 3. The rotary flash dryer of this application features a heater at the bottom of the vacuum chamber, located below the rotary cage-like drying assembly, which continuously provides thermal support to the material inside the vacuum chamber. As the material continuously changes position during the rotation of the rotary cage-like drying assembly, its distribution within the heating zone constantly changes, allowing heat to act on different parts from multiple angles and levels. Through the rotation of the assembly, the natural swaying of the internal material, and the stable heat source provided by the heater, these three elements structurally create a synergistic effect, enabling the material to obtain more uniform heating conditions. This effectively reduces the uneven heating problem caused by heat transfer lag in traditional static drying equipment, improving the overall drying quality and efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the overall structure of a rotary flash drying apparatus provided in an embodiment of this application;

[0026] Figure 2 for Figure 1 Schematic diagram of a rotating cage-shaped drying assembly;

[0027] Figure 3 A schematic diagram of the internal support frame of a rotary flash drying apparatus provided in an embodiment of this application;

[0028] Figure 4 This is an overall perspective view of a rotary flash drying apparatus provided in an embodiment of this application.

[0029] In the picture:

[0030] 100. Support frame; 110. Universal casters; 200. Vacuum chamber; 210. Exhaust pipe; 220. Inspection door; 300. Rotary cage drying assembly; 310. Circular end frame; 320. Central shaft; 330. Connecting block; 340. Support rod; 350. Discharge tray; 351. Pallet plate; 352. Triangular connecting frame; 360. Connecting rod; 400. Transmission mechanism; 410. Motor; 420. Reducer; 430. Drive pulley; 440. Driven pulley; 450. Drive belt; 500. Vacuum extraction system; 510. Vacuum pump; 520. Filter assembly; 600. Heater. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0032] Please see Figures 1-4 This application provides a rotary flash drying device, including a support frame 100, a vacuum chamber 200, a rotary cage drying assembly 300, a transmission mechanism 400, a vacuum pumping system 500, and a heater 600.

[0033] The vacuum chamber 200 is located inside the support frame 100. The top of the vacuum chamber 200 is equipped with an air extraction pipe 210, which is connected to the vacuum extraction system 500. Optionally, the support frame 100 can adopt a structure of metal frame combined with a perforated panel, and the bottom of the support frame 100 is not closed to maintain air circulation.

[0034] The rotary cage drying assembly 300 is arranged horizontally inside the vacuum chamber 200 to carry materials and rotate under the drive of the transmission mechanism 400. The arrangement of the rotary cage drying assembly 300 can structurally break the static drying mode by rotating the entire rotary cage drying assembly 300.

[0035] The transmission mechanism 400 is disposed within the support frame 100 and outside the vacuum chamber 200. The transmission mechanism 400 is connected to the rotary cage drying assembly 300 and is used to drive the rotary cage drying assembly 300 to rotate inside the vacuum chamber 200. The transmission mechanism 400 drives the rotary cage drying assembly 300 to rotate inside the vacuum chamber 200, which helps to improve material agitation and drying uniformity.

[0036] The heater 600 is located at the bottom of the vacuum chamber 200 and is used to provide heat energy to the material inside the rotary cage drying assembly 300 under vacuum conditions to achieve drying. The arrangement of the rotary cage drying assembly 300, combined with the arrangement of the heater at the bottom of the vacuum chamber 200, facilitates stable and uniform heat transfer. Furthermore, placing the heater 600 in the bottom space of the vacuum chamber 200 allows for concentrated upward radiation of heat and contact with the material, improving heating efficiency. To enhance the safety and stability of the heater 600 during long-term operation, optionally, the heater 600 is equipped with a protective cover with an arc-shaped convex structure. This protective cover, made of metal, is arranged in a ring around the heater 600, providing effective physical isolation and preventing material particles from directly contacting the heating element. Furthermore, the protective cover has multiple through holes to ensure normal heat radiation and air circulation, preventing localized heat accumulation due to complete blockage. This structure also helps extend the service life of the heater 600 and facilitates subsequent inspection and maintenance, enhancing the overall safety performance and industrial adaptability of the device.

[0037] This embodiment incorporates a rotary cage-like drying assembly 300 within a closed cavity. This assembly, horizontally positioned within a vacuum chamber 200, is a rotatable structure that continuously rotates under the drive of a transmission mechanism 400. Unlike traditional static drying methods, this structure keeps the material-carrying drying assembly in a continuous rotational state, introducing dynamic disturbance during the drying process. This breaks away from the traditional method of material accumulation and prolonged static drying, laying a structural foundation for uniform heat transfer.

[0038] The rotary cage-like drying assembly 300 rotates within the vacuum chamber 200 under the drive of the transmission mechanism 400. During rotation, the assembly continuously changes the spatial position of the material within the vacuum chamber 200. This rotary bearing method differs from traditional static structures, enabling the material to move relative to the vacuum chamber 200 during the drying process. This helps reduce the long-term residence of material in a specific location and lowers the risk of localized accumulation. Because the material can move in a more uniform state, its surface is exposed to the heat source area more frequently, thereby enhancing the efficiency of heat transfer between materials, improving the consistency of the drying process, and reducing the probability of uneven drying or localized overheating.

[0039] To further enhance the drying effect, a heater 600 is installed at the bottom of the vacuum chamber 200. Located below the rotary cage-like drying assembly 300, the heater 600 continuously provides thermal support to the material inside the vacuum chamber 200. As the material continuously changes position during the rotation of the rotary cage-like drying assembly 300, its distribution within the heating zone constantly changes, allowing heat to act on different parts from multiple angles and levels. Through the synergistic effect of the rotary cage-like drying assembly 300, the natural movement of the internal material, and the stable heat source provided by the heater 600, the material receives relatively uniform heating conditions. This effectively reduces the uneven heating problem caused by heat transfer lag in traditional static drying equipment, improving the overall drying quality and efficiency.

[0040] A rotary cage-like drying assembly 300 is arranged horizontally inside the vacuum chamber 200 and powered by a transmission mechanism 400 to achieve continuous rotation. In this embodiment, this assembly not only serves as a material carrier but also moves the material through its overall rotation. As the rotation continues, the spatial position of the material within the drying chamber constantly changes, preventing the material from remaining stationary and accumulating for extended periods. The rotational motion continuously exposes the material surface to the thermal environment, which, compared to traditional static drying methods, helps to increase the contact frequency between the material and the heat source, thereby improving the efficiency of moisture evaporation and enhancing the uniformity of drying.

[0041] Furthermore, the transmission mechanism 400 is located outside the vacuum chamber 200 and connected to the rotary cage-like drying assembly 300. This external arrangement of the transmission structure avoids exposing the transmission mechanism to high temperature and humidity environments, thereby reducing the risks of component corrosion, aging, and dust accumulation. At the shaft-through section, only a single sealing structure is needed to meet basic airtightness requirements.

[0042] The heater 600 is located in the bottom region of the vacuum chamber 200, directly below the rotary cage drying assembly 300. This bottom-heating layout allows heat to rise vertically and be effectively transferred to the material surface inside the rotating structure. As the material rotates through the heating zone with the rotary cage drying assembly 300 during the drying process, it periodically approaches the heat source, enhancing heat conduction and absorption efficiency. Furthermore, the bottom-mounted heater does not directly contact the rotating components, reducing interference with the material's movement path, which helps maintain smooth assembly operation and improves thermal efficiency and the continuity of the drying process.

[0043] In some embodiments, the rotary cage drying assembly 300 includes a pair of oppositely arranged annular end frames 310 and a central rotating shaft 320 passing between the two annular end frames 310.

[0044] The inner ring surface of the circular end frame 310 is uniformly provided with six connecting blocks 330. Each circular end frame 310 is connected to a connecting rod 360 fixed to the central rotating shaft 320 through the six connecting blocks 330. The circular end frame 310 and the central rotating shaft 320 are connected through multiple connecting rods 360, so that a multi-point connection structure is formed between the circular end frame 310 and the central rotating shaft 320, thereby improving the overall stability of the rotary cage drying assembly 300. Six support rods 340 are connected between the two annular end frames 310 via two opposing connecting blocks 330. All six support rods 340 are arranged parallel to the central rotating shaft 320. The annular end frames 310, central rotating shaft 320, connecting rod 360, and support rods 340 together form a cylindrical cage-like structure. Each support rod 340 is rotatably connected to a feeding tray 350, thus suspending the feeding tray 350. The feeding tray 350 is suspended and rotated via the parallel-arranged support rods 340, which facilitates uniform material distribution and generates appropriate disturbance. The central rotating shaft 320 is connected to the transmission mechanism 400, making the central rotating shaft 320 the core of the rotation drive. Under the drive of the transmission mechanism 400, the central rotating shaft 320 rotates, thereby realizing the rotation of the entire rotary cage-like drying assembly 300.

[0045] The rotary cage-like drying assembly 300 uses circular end frames 310 on both sides as its structural foundation. Multiple connecting blocks 330 are evenly distributed within the inner ring of the circular end frames 310. Connecting rods 360 are installed between the connecting blocks 330 and the central rotating shaft 320, forming a rigid connection. The circular end frames 310 are also laterally connected by multiple support rods 340, thus forming a relatively stable cage-like spatial skeleton. This rotary cage-like drying assembly 300 can maintain its overall geometric shape well during rotation, avoiding structural deformation or excessive swaying due to rotation, thereby contributing to improved operational stability.

[0046] Meanwhile, six support rods 340 are arranged parallel to the central rotating shaft 320, forming multiple material distribution areas in conjunction with the feeding trays 350. Each support rod 340 has a feeding tray 350 suspended from it. These feeding trays 350 are connected to the support rods 340 via a rotatable connection, allowing them to sway moderately when the rotary cage-like drying assembly 300 rotates as a whole. This arrangement of multiple feeding trays 350 facilitates the distribution of material across multiple layers, avoiding localized incomplete drying caused by concentrated accumulation. As the feeding trays 350 sway slightly, the material is continuously disturbed during heating, thereby increasing the contact frequency of the hot airflow, making the heating more uniform, and further improving the drying quality.

[0047] Furthermore, in this embodiment, the central rotating shaft 320 serves both as structural support and power transmission. As the main shaft of the rotary cage-like drying assembly 300, the central rotating shaft 320 penetrates the entire interior of the rotary cage-like drying assembly 300 and is directly connected to components such as the annular end frame 310 and connecting rod 360, thus providing axial skeletal support. Simultaneously, the central rotating shaft 320 also obtains rotational driving force through connection to an external transmission mechanism 400, becoming the main output path for driving the rotation of the rotary cage-like drying assembly 300.

[0048] In some embodiments, the feeding tray 350 includes a rectangular tray plate 351 with a recessed placement surface and two triangular connecting frames 352 distributed at both ends of the upper part of the tray plate 351. The rectangular structure and recessed placement surface of the feeding tray 350 facilitate stable material support. The arrangement of multiple feeding trays 350 ensures that the material is distributed on each tray plate 351, preventing excessive material accumulation. The two triangular connecting frames 352 are rotatably connected to corresponding support rods 340, allowing the feeding tray 350 to sway relative to the support rods 340 during the overall rotation of the rotary cage drying assembly 300. The triangular connecting frames 352 facilitate the formation of a relatively stable hinged support structure, enabling the feeding tray 350 to be both suspended and fixed while also having a certain degree of freedom of swaying. During use, the controlled swaying of the feeding tray 350 introduces a non-forced disturbance mechanism into the overall rotation of the rotary cage drying assembly 300, which helps to achieve gentle turning and improve the uniformity of material drying.

[0049] In the above embodiments, the tray 351 in the feeding tray 350 has a rectangular structure with a recessed area in the center, forming a concave placement surface. This configuration helps improve load-bearing stability, concentrating the material in the central area of ​​the tray 351 during placement, reducing the possibility of slipping to the edge or even being thrown out due to rotational inertia. The rectangular layout of the tray 351, after multiple feeding trays 350 are installed on each support rod 340, makes it easier to maintain consistent arrangement, facilitating the formation of an equidistant multi-layered structure, thereby improving the neatness and uniformity of material distribution during the drying process to a certain extent.

[0050] Meanwhile, triangular connecting frames 352 are provided at both ends of the pallet 351. The upper part of the triangular connecting frame 352 is hinged to the support rod 340 by rotation, forming an approximately three-point support installation structure. The lower end of the triangular connecting frame 352 is fixed to the pallet 351, and the upper end serves as a rotational hinge point to cooperate with the support rod 340, allowing the pallet 351 to sway to a limited extent when subjected to gravity and centrifugal force. Moreover, the triangular structure has good mechanical stability, effectively distributing the force at the rotation point, reducing structural fatigue, and extending the service life of the discharge tray 350. At the same time, the discharge tray 350 adopts this suspension form with swing freedom distributed on each support rod 340, which helps the discharge tray 350 to continuously and appropriately adjust its angle during operation, promoting the transfer of material between different heating surfaces and improving heating uniformity.

[0051] Furthermore, in this embodiment, the feeding tray 350 is suspended from the support rod 340 via the aforementioned rotating connection method, rather than being rigidly fixed. As the rotary cage-like drying assembly 300 rotates as a whole, the tray can sway moderately under its own weight, following the posture of the assembly. This structural design avoids the material breakage problems that may occur with traditional strong stirring structures, and to a certain extent breaks the static accumulation state of the material, causing the material to frequently change its contact surface with the heat source during the tumbling process. Compared to rigid trays or continuous stirring methods, this combination of "natural swaying and rotational drive" provides gentler disturbance, making it particularly suitable for drying heat-sensitive materials or fragile particles, and helping to improve drying uniformity and material quality under stable operation.

[0052] In some embodiments, the transmission mechanism 400 includes a motor 410, a reducer 420, a driving pulley 430, a driven pulley 440, and a transmission belt 450.

[0053] The output shaft of motor 410 is connected to a drive pulley 430, which drives a corresponding driven pulley 440 to rotate via a transmission belt 450. The driven pulley 440 is connected to the input end of reducer 420, and the output end of reducer 420 is connected to the central rotating shaft 320, which drives the rotary cage-like drying assembly 300 to rotate within the vacuum chamber 200. The motor 410 is connected to reducer 420 via a belt pulley drive, forming an indirect drive system, which helps reduce transmission shock and extend system life. The output shaft of reducer 420 is directly connected to the central rotating shaft 320, providing a clear power transmission path, facilitating structural layout, and improving power transmission efficiency.

[0054] In the transmission mechanism 400 of the above embodiment, the motor 410 is not directly connected to the reducer 420. Instead, power transmission is achieved through an indirect transmission structure consisting of a driving pulley 430, a transmission belt 450, and a driven pulley 440. This belt pulley transmission method has certain elastic buffering characteristics, which can effectively absorb the torque impact generated in a short time when the motor starts or stops, reduce the stress transmission caused by instantaneous load fluctuations to other components of the system, help reduce the impact load on the reducer 420 and the central shaft 320, thereby extending the service life of related components and reducing the maintenance frequency.

[0055] Furthermore, in this embodiment, the output end of the reducer 420 is directly connected to the central shaft 320 in the rotary cage-like drying assembly 300, making the transmission path from power input to the final rotating actuator more concise and efficient. After the speed is adjusted by the reducer 420, the power is directly applied to the central shaft 320, avoiding the energy loss caused by using multi-stage linkage mechanisms. This direct connection structure not only facilitates later installation and disassembly but also provides a relatively stable output capability under long-term operating conditions, which is beneficial to the power guarantee of the device in continuous working conditions.

[0056] Furthermore, this embodiment employs a structural combination where the driving pulley 430 and the driven pulley 440 transmit power via a transmission belt 450, making the adjustment of the transmission ratio more flexible. By replacing the pulley specifications, adjusting the pulley center distance, or changing the belt model, it can adapt to the speed and torque parameters required by different materials or processes. In actual operation, this structural form is not only convenient to assemble and maintain, but also, due to the inherent flexibility of the belt, operates more quietly than a gear transmission system. It is particularly suitable for low-to-medium speed conditions or industrial drying scenarios where noise control is required, which is of positive significance for improving the overall operational flexibility and adaptability of the machine.

[0057] In actual operation, the discharge tray 350 is rotatably suspended from the support rod 340 via a triangular connecting frame 352, with its center of gravity located below the rotation point, allowing for a certain degree of freedom of oscillation. Because the rotary cage-like drying assembly 300 rotates slowly around the central shaft 320, the material is not violently thrown out under centrifugal force. Furthermore, the discharge tray is not rigidly fixed, allowing for a certain degree of natural swaying during rotation. This swaying is mainly caused by a combination of gravity and centrifugal force, with a moderate amplitude that prevents the entire discharge tray from overturning, but is sufficient to break the static accumulation of material on the tray plate 351, causing the material to slide and agitate slowly during rotation, thereby increasing the heat-contact area. To maintain this stable swaying state, the rotational speed of the central shaft 320 is controlled at a low range after adjustment by the reducer 420, prioritizing material turning efficiency and heat transfer uniformity over high-speed rotation. This design makes the structure more stable and suitable for heat-sensitive materials with high requirements for drying temperature and disturbance intensity.

[0058] Optionally, the rotational speed of the central rotating shaft 320 driven by the transmission mechanism 400 is controlled between 5 and 20 revolutions per minute. Within this speed range, the feeding tray 350 can generate moderate swaying relative to the support rod 340 under the action of gravity during rotation, thereby causing the material to slowly agitate and periodically tumble, thus improving the uniformity of material drying and heat exchange efficiency. During actual debugging, multiple sets of comparative experiments were conducted on the rotational speed of the central rotating shaft 320. The results showed that when the rotational speed is controlled within the range of 5 to 20 revolutions per minute, the rotary cage-like drying assembly 300 can stably drive the feeding tray 350 to rotate with the entire assembly, while the feeding tray can generate moderate swaying under the action of gravity. This swaying amplitude will not cause the tray to overturn or a large amount of material to slip off, and it can break the static accumulation state of the material on the tray plate 351, promoting continuous exchange of the heated surface during tumbling, thus improving heat exchange efficiency and drying uniformity.

[0059] In some embodiments, the heater 600 is an array of multiple electric heating tubes, distributed and installed on the bottom inner wall of the vacuum chamber 200. The distribution of multiple electric heating tube arrays at the bottom of the vacuum chamber 200 helps to form a uniform heat field, improving the coverage of the heating effect. Furthermore, the heater 600's installation at the bottom of the chamber avoids interference with the operation of the rotating structure and facilitates wiring and maintenance. The heater 600 is connected to a temperature control device outside the support frame 100 via wires for adjusting the heating temperature. The heater 600 uses electric heating tubes, which have the advantage of fast response speed. Combined with the temperature control device, it allows for precise temperature control during the drying process, thereby improving adaptability to different materials.

[0060] In this embodiment, the heater 600 consists of an array of multiple sets of electric heating tubes, distributed along the bottom wall of the vacuum chamber 200. This arrangement is more conducive to forming a uniform heat field than single-point heating, allowing heat to cover a larger area below the rotating cage-like drying assembly 300 from bottom to top. The arrangement of the electric heating tubes can be flexibly adjusted according to the geometry of the vacuum chamber 200, thereby optimizing heat distribution, reducing the risk of local overheating, and helping to improve thermal efficiency and overall drying performance.

[0061] Furthermore, the heater 600 is fixedly installed at the bottom of the vacuum chamber 200, without occupying the core space inside the chamber, and avoids contact with the rotating cage-like drying assembly 300. This structural arrangement maintains good spatial coordination between the heating area and the rotating structure. This bottom-mounted design improves the utilization efficiency of the chamber space and makes the rotating components operate more smoothly. The heater 600 is led outwards to the outside of the support frame 100 via wires and is connected to a temperature control device for adjusting and controlling the heating temperature. This also facilitates wiring, inspection, and subsequent maintenance, enhancing the overall ease of operation and stability of the machine.

[0062] In addition, electric heating tubes have the characteristics of fast response speed, rapid heating and low thermal inertia. They can adjust the heating intensity in a short time according to the parameter settings of the temperature control device. Their rapid response capability helps to maintain temperature stability during the drying process.

[0063] In some embodiments, the vacuum pumping system 500 includes a vacuum pump 510 and a filter assembly 520 disposed on the pumping pipe 210. The filter assembly 520 is used to filter dust generated during the drying process, thereby preventing fine dust from being drawn into the vacuum pump 510.

[0064] During the drying process, the moisture in the material continuously evaporates, along with the release of some fine particles or dust. These fine impurities may enter the extraction pipe 210 with the airflow and be further sucked in by the vacuum pump 510. To reduce the risk of such particles entering the core extraction component, this embodiment provides a filter assembly 520 on the extraction pipe 210 for pre-treating the dust in the airflow. The filter assembly 520 helps reduce the risk of dust erosion and blockage of the rotor or seals inside the vacuum pump 510, thereby extending its service life; on the other hand, it also maintains the smooth airflow and operating efficiency of the vacuum extraction system 500, thereby improving the continuity and stability of the overall drying process. During device operation, the vacuum pump 510 continuously extracts air from inside the vacuum chamber 200, creating a low-pressure state. The extracted air is a mixture containing trace amounts of water vapor, which is processed by the filter assembly 520 and then compressed and discharged by the vacuum pump 510. This extracted gas is discharged through the exhaust pipe connected to the exhaust port of the vacuum pump 510.

[0065] The filter assembly 520 typically employs a replaceable filter element or a multi-layer filter structure. Users can flexibly decide whether to clean or replace the filter elements based on factors such as equipment operating time, the characteristics of the materials being processed, or changes in filtration resistance. This structural design facilitates daily maintenance and helps reduce airflow obstruction caused by dust accumulation, thereby lowering the failure rate during equipment operation.

[0066] To accommodate the varying characteristics of different materials, the filter assembly 520 allows for flexible selection of suitable filter media structures. For materials prone to forming light dust, high-density filter cartridges can be used for capture; for conditions involving corrosive gases or special volatile components, materials such as high-temperature resistant fiber layers or activated carbon adsorption layers can be used to enhance the filter assembly's adaptability to different application environments. This structural enhancement provides the device with greater compatibility and flexibility when facing different types of materials or process requirements, creating favorable conditions for expanding the application range of the drying system.

[0067] In some embodiments, a maintenance door 220 is provided on one side of the vacuum chamber 200 to facilitate observation, cleaning, or necessary component replacement of the interior of the vacuum chamber 200. The maintenance door 220 can be connected to the wall of the vacuum chamber 200 via a hinge, making opening and closing operations simple and reliable.

[0068] During long-term use, residual material may gradually accumulate inside the rotary cage drying assembly 300, or fine dust may adhere to the internal structural surface due to the hot air disturbance generated during the drying process. Simultaneously, some connecting parts and the discharge tray 350 may become slightly loose or worn due to continuous vibration. To facilitate later maintenance and cleaning, an inspection door 220 is installed on one side wall of the vacuum chamber 200. After stopping the equipment, the user can directly open the door to quickly inspect the accumulated dust, loose parts, or operating status inside the assembly.

[0069] Meanwhile, the inspection door 220 is hinged to the vacuum box 200, featuring a simple and compact structure that opens and closes smoothly. During operation, if inspection or cleaning is required, the operator only needs to open the door in the direction of hinge rotation, allowing for quick access to the inspection area without disassembling the outer casing or using additional tools. The hinged connection structure offers excellent repeatability, reducing the risk of misalignment or loosening of the seal due to frequent opening and closing. Compared to sliding rail or snap-fit ​​connection methods, this structure is more suitable for the high-temperature and dusty environments where drying equipment operates, exhibiting strong structural stability and adaptability.

[0070] In some embodiments, the bottom of the support frame 100 is provided with four swivel casters 110, which facilitates flexible movement of the device between different working areas and improves operational flexibility. Each swivel caster 110 is equipped with a foot-operated brake structure to enable movement and positional fixation of the device. The swivel casters 110 at the bottom of the support frame 100, with their foot-operated brake mechanisms, allow the operator to quickly lock the device in position, ensuring stability and safety during operation. The combination of movement and locking functions of the swivel casters 110 gives the device both mobility and operational stability, thereby enhancing overall adaptability and ease of use.

[0071] In this embodiment, four omnidirectional casters 110 are provided at the bottom of the support frame 100. Each caster can rotate 360 ​​degrees horizontally, giving the entire device good mobility. In actual use, users can flexibly adjust the placement of the device according to changes in production line layout or operation process requirements without relying on external handling tools. This design is particularly suitable for small and medium-sized workshop environments with limited space or frequent layout adjustments, helping to improve the flexibility of the overall process layout and enhance the adaptability of the equipment in multi-station scenarios.

[0072] After the device is moved to the designated position, the operator can activate the braking mechanism on the omnidirectional casters 110 via foot pedal operation to lock the device in position and prevent displacement due to ground slope or operational interference. The foot-operated braking mechanism is convenient and easy to use, adapting to the fast-paced, high-frequency operation of industrial environments. During drying operation, this structure helps improve the stability of the device, especially when the rotary cage drying assembly 300 is running, reducing slippage or vibration of the bottom structure and providing support for stable operation.

[0073] Furthermore, by introducing omnidirectional casters 110 with braking function at the bottom of the support frame 100, a synergistic combination of "easy movement" and "instant fixation" is formed, giving the device both flexible deployment and stable support. During daily handling or fine-tuning, users can easily push the device to move it, and after positioning, the device can be quickly and securely fixed in the designated workstation.

[0074] The rotary flash drying apparatus of this application embodiment is used as follows:

[0075] Before using the rotary flash dryer of this embodiment to dry materials, the device is first moved to the designated work station and fixed in position using the foot-operated brake structure on the universal casters 110 at the bottom of the support frame 100. Then, the inspection door 220 on the side of the vacuum chamber 200 is opened, and the material to be processed is evenly placed onto multiple feeding trays 350, allowing the material to be dispersed in layers inside the rotary cage-like drying assembly 300. After closing the inspection door 220, the vacuum extraction system 500 is activated, creating airflow inside the extraction pipe 210, thereby gradually establishing a low-pressure environment inside the vacuum chamber 200, which helps to accelerate the moisture evaporation process. According to the drying requirements of the material, a suitable heating temperature is set through the temperature control device, the bottom heater 600 is activated, and multiple sets of electric heating tubes begin to work, transferring heat energy into the interior space of the vacuum chamber 200.

[0076] During the drying process, after the motor 410 starts, it drives the reducer 420 to operate via the driving pulley 430, transmission belt 450, and driven pulley 440. The output end of the reducer 420 is connected to the central rotating shaft 320, thereby driving the rotary cage-like drying assembly 300 to rotate stably around the horizontal axis within the vacuum chamber 200. As the assembly rotates, multiple feeding trays 350 suspended from the support rod 340 via triangular connecting frames 352 will sway slightly due to gravity and changes in rotational posture, causing the material to continuously generate moderate disturbance within the tray plate 351, promoting continuous exposure of different parts of the material to the thermal environment. This process helps improve heat exchange efficiency, reduces uneven heating caused by material accumulation, and is suitable for drying materials with high temperature distribution requirements.

[0077] Once the material reaches the set dryness level, the heater 600 and vacuum pumping system 500 are turned off sequentially, and the gas is released through the exhaust pipe of the vacuum pump 510, restoring the vacuum chamber 200 to normal pressure. Then, the inspection door 220 is opened, the dried material is removed, and any residual dust or impurities inside the rotary cage drying assembly 300 are cleaned. If necessary, the filter assembly 520 can be disassembled for replacement or cleaning. The entire operation process is clearly laid out and the steps are compact, suitable for the rapid drying of various powder or granular materials with different moisture contents and high heat sensitivity, facilitating efficient application in industrial settings.

[0078] In practical applications, the rotary flash dryer of this embodiment is widely applicable to the efficient drying of water-containing powders or crystalline materials. For example, in the production process of potassium or sodium aniline acetate, rapid drying is usually required after neutralization crystallization to remove residual moisture from the crystal surface. This device can be installed in the drying section of such processes as a key piece of equipment for dehydrating and drying crystalline materials. By combining rotary agitation and uniform bottom heating under low pressure, moisture can be fully evaporated in a short time, while avoiding uneven heating or structural damage to the material, thus meeting the dual requirements of drying temperature and efficiency for such heat-sensitive products. The device is stable in operation and easy to use, facilitating continuous and flexible drying processes in actual production.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A rotary flash drying apparatus, characterized by, It comprises a support frame (100), a vacuum box (200), a rotary cage drying assembly (300), a transmission mechanism (400), a vacuum pumping system (500) and a heater (600); The vacuum box (200) is arranged inside the support frame (100), and the top of the vacuum box (200) is provided with an air exhaust pipeline (210) connected to the vacuum pumping system (500); The rotary cage drying assembly (300) is arranged inside the vacuum box (200) in a horizontal direction, and is used for carrying materials and rotating under the driving of the transmission mechanism (400); The transmission mechanism (400) is arranged inside the support frame (100) and outside the vacuum box (200), and is connected with the rotary cage drying assembly (300) for driving the rotary cage drying assembly (300) to rotate in the vacuum box (200); The heater (600) is arranged at the bottom end of the vacuum box (200) and is used for providing heat energy to the materials in the rotary cage drying assembly (300) under vacuum state to realize drying.

2. The rotary flash drying apparatus according to claim 1, wherein The rotary cage drying assembly (300) comprises a pair of oppositely arranged circular ring end frames (310) and a central rotating shaft (320) penetrating between the two circular ring end frames (310); The inner ring surface of the circular ring end frame (310) is uniformly provided with six connecting blocks (330) in a ring direction, each of the circular ring end frames (310) is connected with a connecting rod (360) fixedly connected with the central rotating shaft (320) through the six connecting blocks (330), and six support rods (340) are connected between the two circular ring end frames (310) through two opposite connecting blocks (330), the six support rods (340) are arranged in parallel with the central rotating shaft (320), the circular ring end frame (310), the central rotating shaft (320), the connecting rod (360) and the support rod (340) jointly form a cylindrical cage structure, and each of the support rods (340) is rotatably connected with a discharging disc (350), and the central rotating shaft (320) is connected with the transmission mechanism (400).

3. The rotary flash drying apparatus according to claim 2, wherein The discharging disc (350) comprises a rectangular structure and has a tray plate (351) with an inwardly recessed placement surface and two triangular connecting frames (352) distributed at the upper two ends of the tray plate (351), the two triangular connecting frames are rotatably connected with the corresponding support rods (340), and the discharging disc (350) can shake relative to the support rods (340) during the overall rotation of the rotary cage drying assembly (300).

4. The rotary flash drying apparatus according to claim 1, wherein The transmission mechanism (400) comprises a motor (410), a speed reducer (420), a driving pulley (430), a driven pulley (440) and a transmission belt (450). The output shaft of the motor (410) is connected with a driving pulley (430), the driving pulley (430) drives a corresponding driven pulley (440) to rotate through a transmission belt (450), the driven pulley (440) is connected with the input end of a speed reducer (420), the output end of the speed reducer (420) is connected with the central rotating shaft (320), and the rotating cage drying assembly (300) is driven to rotate in the vacuum box (200).

5. The rotary flash drying apparatus according to claim 1, wherein The heater (600) is a plurality of groups of electric heating pipe arrays, which are distributed and installed on the inner wall surface of the bottom of the vacuum box (200), the heater (600) is connected with a temperature control device outside the support frame (100) through a wire, and is used for adjusting the heating temperature.

6. The rotary flash drying apparatus according to claim 1, wherein The vacuum air exhaust system (500) comprises a vacuum pump (510) and a filter assembly (520) arranged on the air exhaust pipeline (210), and the filter assembly (520) is used for filtering dust generated in the drying process.

7. The rotary flash drying apparatus according to claim 1, wherein One side of the vacuum box (200) is provided with an access door (220), and the access door (220) is connected with the wall surface of the vacuum box (200) through a hinge.

8. The rotary flash drying apparatus according to claim 1, wherein The bottom of the support frame (100) is provided with four universal casters (110), and each universal caster (110) is provided with a foot brake structure, so as to realize the movement and position fixing of the device.

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