Vertical wiped film reactor

Abstract

The application relates to the technical field of heat exchange evaporation equipment, and discloses a vertical scraped film reactor, which comprises a reaction kettle, an evaporation cavity is formed in the reaction kettle, a transmission shaft penetrates the reaction kettle in the axial direction and is rotatably arranged in the reaction kettle, a first driving mechanism is used for driving the transmission shaft, a plurality of adjusting mechanisms are arranged along the axial direction of the transmission shaft at intervals, the adjusting mechanisms comprise at least one group of scraper assemblies, the scraper assemblies comprise driving members and scrapers, the driving members are used for driving the scrapers to move in the radial direction of the transmission shaft to approach or move away from the inner wall of the evaporation cavity, and a synchronous driving mechanism is used for synchronously driving the driving members on the adjusting mechanisms to move in the radial direction of the transmission shaft, the synchronous driving mechanism is mounted on the transmission shaft and is drivingly connected with the driving members. The vertical scraped film reactor can realize the separate adjustment of the scrapers to accurately correct the liquid film in local areas and can realize the synchronous adjustment of all the scrapers to quickly adapt to different thickness requirements.

Description

Technical Field

[0001] This application belongs to the technical field of heat exchange evaporation equipment, specifically relating to a vertical scraped film reactor. Background Technology

[0002] In the processes of solution concentration and solvent recovery in the chemical, pharmaceutical, and food industries, vertical scraped membrane reactors are widely used for the evaporation treatment of heat-sensitive and high-viscosity materials due to their high heat transfer efficiency and short material residence time. They are key equipment for achieving efficient separation and purification and are of great significance for ensuring product quality and production efficiency.

[0003] Currently, the scrapers in vertical scraped film reactors are mostly fixed, or can only be roughly adjusted as a whole within the same group. Because it's impossible to individually correct for differences in liquid film thickness in different areas of the evaporation chamber wall, the equipment is prone to problems during operation, such as locally excessively thick liquid films leading to uneven heat transfer, or locally thin films causing dry walls and coking. Furthermore, this design makes it difficult to quickly adapt to the needs of materials with different viscosities and throughputs, resulting in unstable evaporation effects. This not only increases equipment maintenance costs but also limits its applicability and operational reliability to some extent. Summary of the Invention

[0004] The purpose of this application is to provide a vertical scraped film reactor that can achieve individual adjustment of the scrapers to accurately correct the liquid film in local areas, and can also achieve synchronous adjustment of all scrapers to quickly adapt to different thickness requirements.

[0005] To achieve the above objectives, this application provides a vertical scraped film reactor, the vertical scraped film reactor comprising: The reaction vessel has an evaporation chamber inside; A drive shaft extends axially through the reactor and is rotatably disposed within the reactor; A first drive mechanism is used to drive the transmission shaft; The adjustment mechanism has multiple components and is arranged axially spaced along the drive shaft. The adjustment mechanism includes at least one set of scraper assemblies. The scraper assembly includes a drive member and a scraper. The drive member is used to drive the scraper to move radially along the drive shaft to approach or move away from the inner wall of the evaporation chamber. A synchronous drive mechanism is used to synchronously drive the drive members on the plurality of adjustment mechanisms to move radially along the transmission shaft. The synchronous drive mechanism is mounted on the transmission shaft and is drivenly connected to the plurality of drive members.

[0006] In some embodiments, the driving member has a guide protrusion at the top and a guide pin at the bottom, and the adjustment mechanism further includes: A mounting housing is fixed to the outside of the drive shaft. The interior of the mounting housing forms a mounting space for accommodating the drive component. The top wall of the mounting space is provided with a guide groove that slides with the guide protrusion. The guide groove extends radially along the drive shaft. A drive assembly is provided, which is a transmission connection between the guide pin and the synchronous drive mechanism. The drive assembly is used to drive the guide pin so that the guide protrusion slides along the guide groove.

[0007] In some embodiments, the driving component includes: A guide seat is fixedly installed inside the mounting housing. The guide seat is provided with a guide hole corresponding to each of the driving components, and the guide hole extends radially along the transmission shaft. A drive base is rotatably mounted inside the mounting housing and driven by the synchronous drive mechanism. The drive base has an arc-shaped hole corresponding to each of the drive components. The guide pin passes through the guide hole and the arc-shaped hole in sequence.

[0008] In some embodiments, the synchronization drive mechanism includes: The second drive mechanism is mounted on the drive shaft; A transmission plate is connected to the output end of the second drive mechanism. Multiple transmission rods are mounted on the transmission plate. The transmission rods extend along the axial direction of the transmission shaft, pass through multiple drive seats, and are fixedly connected to the drive seats. The guide seat has an arc-shaped through hole for the transmission rod to pass through.

[0009] In some embodiments, the second drive mechanism includes a second motor and a second reducer, the second reducer being driven between the second motor and the transmission plate.

[0010] In some embodiments, the synchronous drive mechanism further includes a positioning bearing mounted on the drive shaft and connected to the end of the drive rod away from the second drive mechanism.

[0011] In some embodiments, the vertical scraped film reactor further includes a top cover located at the top of the reactor vessel. The interior of the top cover forms a collection chamber communicating with the evaporation chamber. The collection chamber is equipped with a gas-liquid separation device and a steam outlet communicating with the outside.

[0012] In some embodiments, the first drive mechanism is located on the top of the top cover and includes a first motor and a first reducer, the first reducer being driven between the first motor and the drive shaft.

[0013] In some embodiments, the evaporation chamber has a material inlet at the top and a material outlet at the bottom.

[0014] In some embodiments, the bottom of the reactor is provided with a bearing housing that is rotatably connected to the drive shaft, and there are multiple material outlets surrounding the outer periphery of the bearing housing.

[0015] In some embodiments, the sidewall of the evaporation chamber is provided with a medium channel for introducing a heat-conducting medium.

[0016] In some embodiments, the medium channel is spiral-shaped.

[0017] In some embodiments, the medium channel comprises multiple segments arranged along the axial direction of the reactor, with a medium inlet and a medium outlet at each end of each segment of the medium channel.

[0018] In some embodiments, two adjacent media channels are connected by a circulating heating device, which has a built-in delivery pump.

[0019] In some embodiments, the scrapers on adjacent adjustment mechanisms are arranged at an angle offset along the circumference of the drive shaft.

[0020] The vertical scraped film reactor according to the present invention includes a reaction vessel, a drive shaft, a first drive mechanism, an adjustment mechanism, and a synchronous drive mechanism. The adjustment mechanism includes at least one set of scraper assemblies, each of which includes a drive member and a scraper. The first drive mechanism drives the drive shaft to rotate along the axis of the reaction vessel. The drive member drives the scraper to move radially along the drive shaft to approach or move away from the inner wall of the evaporation chamber. The synchronous drive mechanism synchronously drives the drive members on multiple adjustment mechanisms to move radially along the drive shaft. This effectively solves the technical problems in the prior art, such as the inability to adjust the scraper individually, which easily leads to uneven liquid film thickness, and the inability to adjust multiple scrapers synchronously, resulting in slow response.

[0021] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a cross-sectional schematic diagram of an embodiment of the vertical scraped film reactor of the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a cross-sectional schematic diagram of an embodiment of the guide seat of the present invention; Figure 4 This is a cross-sectional schematic diagram of an embodiment of the drive seat of the present invention.

[0023] Explanation of reference numerals in the attached figures Vertical scraped membrane reactor 100; 10 Reactor; 11 Evaporation chamber; 12 Material inlet; 13 Material outlet; 14 Bearing seat; Drive shaft 20; First drive mechanism 30; first motor 31; first reducer 32; Adjustment mechanism 40; scraper assembly 41; drive component 411; guide protrusion 4111; guide pin 4112; scraper 412; mounting shell 42; guide groove 421; drive assembly 43; guide seat 431; guide hole 4311; arc-shaped through hole 4312; drive seat 432; arc-shaped hole 4321; Synchronous drive mechanism 50; second drive mechanism 51; second motor 511; second reducer 512; transmission plate 52; transmission rod 521; positioning bearing 53; Top cover 60; Collection chamber 61; Gas-liquid separation device 62; Steam outlet 63; First medium channel 71; First medium inlet 711; First medium outlet 712; Second medium channel 72; Second medium inlet 721; Second medium outlet 722; Third medium channel 73; Third medium inlet 731; Third medium outlet 732; Circulating heating device 80. Detailed Implementation

[0024] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0026] In the embodiments of the present invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used to describe the relative positional relationships of the components in relation to the directions shown in the accompanying drawings or in relation to the vertical, perpendicular, or gravitational directions.

[0027] This invention proposes a vertical scraped membrane reactor 100.

[0028] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0029] In some specific embodiments of the present invention, such as Figure 1 As shown, the vertical scraped film reactor 100 includes a reactor 10, a drive shaft 20, a first drive mechanism 30, an adjustment mechanism 40, and a synchronous drive mechanism 50. An evaporation chamber 11 is formed inside the reactor 10. The drive shaft 20 axially passes through the reactor 10 and is rotatably mounted thereon. The first drive mechanism 30 drives the drive shaft 20. Multiple adjustment mechanisms 40 are arranged at intervals along the axial direction of the drive shaft 20. Each adjustment mechanism 40 includes at least one set of scraper assemblies 41. Each scraper assembly 41 includes a drive member 411 and a scraper 412. The drive member 411 drives the scraper 412 to move radially along the drive shaft 20 to approach or move away from the inner wall of the evaporation chamber 11. The synchronous drive mechanism 50 synchronously drives the drive members 411 on the multiple adjustment mechanisms 40 to move radially along the drive shaft 20. The synchronous drive mechanism 50 is mounted on the drive shaft 20 and drivenly connected to the multiple drive members 411.

[0030] The embodiments of the present invention, by providing a drive component 411 that can independently adjust the position of the scraper 412 radially along the drive shaft 20, can accurately correct the thickness deviation of the liquid film of the material on the inner wall of the evaporation chamber 11, thereby effectively avoiding the decrease in heat transfer efficiency caused by an excessively thick liquid film, or problems such as dry walls and coking caused by an excessively thin liquid film, thus reducing equipment maintenance costs while ensuring product quality. At the same time, by using the synchronous drive mechanism 50 to synchronously drive the drive components 411 on each adjustment unit, the liquid film thickness requirements of different materials can be quickly adapted. Combined with the first drive mechanism 30 driving the drive shaft 20 and the scraper 412 to rotate and scrape the film, the system significantly improves the uniformity and efficiency of evaporation. The overall structural design takes into account the flexibility of adjustment and the convenience of operation, enhancing the adaptability and reliability of the equipment.

[0031] Specifically, the reactor 10 has a vertical cylindrical structure, with an enclosed, sealed evaporation chamber 11 inside. The evaporation chamber 11 has a material inlet 12 at the top and a material outlet 13 at the bottom. The sidewalls of the evaporation chamber 11 have medium channels for introducing a heat-conducting medium. The vertical scraped film reactor 100 also includes a top cover 60 located at the top of the reactor 10. The top cover 60 has a collection chamber 61 connected to the evaporation chamber 11 inside. The collection chamber 61 has a gas-liquid separation device 62 and a steam outlet 63 connected to the outside. Material enters the evaporation chamber 11 through the material inlet 12 at the top of the reactor 10, and the residual liquid after evaporation is discharged from the material outlet 13 at the bottom of the reactor 10. The top cover 60 and the reactor 10 are fixedly connected by fasteners, and a seal is provided at the joint to ensure sealing performance. The collection chamber 61, located directly above and connected to the evaporation chamber 11, is formed inside the top cover 60 and is used to collect the steam generated during evaporation. The collection chamber 61 is equipped with a gas-liquid separation device 62, which can separate the residual liquid entrained in the steam, and the pure steam is discharged to the subsequent processing steps through the steam outlet 63.

[0032] The drive shaft 20 is vertically installed along the central axis of the reactor 10, with its upper end extending above the top cover 60 and connecting to the first drive mechanism 30. Its lower end is rotatably engaged with the bottom of the reactor 10 via a bearing seat 14 to ensure rotational stability. After the first drive mechanism 30 is started, it will drive the drive shaft 20 and the multiple adjustment mechanisms 40 mounted on it to rotate synchronously, thereby causing the scraper 412 to rotate along the inner wall of the evaporation chamber 11, achieving uniform and continuous film scraping operation.

[0033] Multiple adjustment mechanisms 40 are arranged axially at intervals along the drive shaft 20 and are fixedly connected to the drive shaft 20, allowing them to rotate synchronously with the drive shaft 20. Each adjustment mechanism 40 is equipped with at least one set of scraper assemblies 41, each set of scraper assemblies 41 including a drive element 411 and a corresponding scraper 412 connected thereto, enabling independent adjustment of each scraper 412. To improve the smoothness of the drive shaft 20 during rotation, each adjustment mechanism 40 is equipped with no fewer than two sets of scraper assemblies 41, arranged in a circumferentially even distribution. The scraper 412 has a plate-like structure, and its contour matches the shape of the inner wall of the evaporation chamber 11, ensuring full contact with the wall surface during film scraping. The drive element 411 can extend and retract independently radially along the drive shaft 20, thereby individually adjusting the distance between the corresponding scraper 412 and the inner wall of the evaporation chamber 11. This design enables the system to dynamically and precisely correct the liquid film thickness in different sections, effectively improving heat transfer uniformity and preventing efficiency reduction and coking problems caused by excessively thick or thin local liquid films.

[0034] The scrapers 412 have different arrangements. In the first arrangement, the scrapers 412 on adjacent adjustment mechanisms 40 are aligned. From the axial projection direction, multiple scrapers 412 are completely overlapped in the axial direction. That is, multiple adjustment mechanisms 40 arranged at intervals on the transmission shaft 20 are all the same. This arrangement is beneficial to improve material versatility and facilitates installation and maintenance. However, in order to avoid interference between adjacent adjustment mechanisms 40 during rotation, a certain axial gap will be left between the upper and lower adjacent scrapers 412. This gap causes a local area of ​​the inner wall of the evaporation chamber 11 to be unscraped, resulting in uneven liquid film thickness.

[0035] Based on this, this application also proposes another arrangement, which optimizes the arrangement of scraper 412 in the first arrangement. In the second arrangement (not shown in the figure), the scrapers 412 on adjacent adjustment mechanisms 40 are arranged at an angle offset along the circumference of the transmission shaft 20. The scrapers 412 on the upper adjustment mechanism 40 (defined as scraper 412 group A) are evenly distributed along the axial direction of the transmission shaft 20, and the scrapers 412 on the lower adjustment mechanism 40 (defined as scraper 412 group B) are evenly distributed along the axial direction of the transmission shaft 20, but scraper 412 group B forms a certain angle offset relative to scraper 412 group A in the axial projection.

[0036] When the drive shaft 20 drives all the adjusting mechanisms 40 and scrapers 412 to rotate synchronously, the scrapers 412 on adjacent adjusting mechanisms 40 can perform relay scraping on the inner wall of the evaporation chamber 11. Compared with the traditional in-phase arrangement, this staggered arrangement can cover all circumferential areas of the inner wall of the evaporation chamber 11, effectively avoiding the problem of local material not being scraped and uneven liquid film thickness caused by gaps between scrapers 412. At the same time, staggered scraping helps to reduce the difference in residence time of material at different positions on the wall, further ensuring the consistency of liquid film thickness in different height areas. This staggered arrangement is particularly suitable for working conditions where high-viscosity materials are prone to accumulate on the wall, and can significantly improve the overall evaporation efficiency and product quality stability.

[0037] The synchronous drive mechanism 50 is connected to all drive components 411. After startup, it synchronously drives all drive components 411 on each adjustment mechanism 40 to move radially along the drive shaft 20, achieving uniform adjustment of the distance between all scrapers 412 and the inner wall of the evaporation chamber 11, and quickly adapting to the required liquid film thickness reference value for different materials. Understandably, when the liquid film thickness needs to be increased, the synchronous drive mechanism 50 drives the drive components 411 on multiple adjustment mechanisms 40 to move radially away from the inner wall of the evaporation chamber 11; when the liquid film thickness needs to be decreased, the synchronous drive mechanism 50 drives the drive components 411 on multiple adjustment mechanisms 40 to move radially closer to the inner wall of the evaporation chamber 11.

[0038] During operation, material enters the evaporation chamber 11 through the material inlet 12 and flows downwards along the inner wall of the evaporation chamber 11 to form an initial liquid film. The first drive mechanism 30 drives the transmission shaft 20, the adjustment mechanism 40, and the scraper 412 to rotate synchronously, and the scraper 412 then scrapes the liquid film. During this process, the independent adjustment of each drive component 411 can precisely correct for local unevenness of the liquid film; with the synchronous adjustment of the synchronous drive mechanism 50, the overall thickness of the liquid film can be set, thereby ensuring that a uniform and stable liquid film is formed on the inner wall of the evaporation chamber 11. At the same time, the heat-conducting medium introduced into the medium channel exchanges heat with the liquid film, promoting rapid evaporation of the material. The generated steam then rises to the collection chamber 61, and is discharged from the system after gas-liquid separation.

[0039] like Figure 2As shown, in one embodiment of the present invention, the driving component 411 for individually adjusting the scraper 412 is an electric push rod. The electric push rod has the characteristics of high precision and large thrust within a certain stroke range, and its installation is relatively simple. Those skilled in the art will understand that this application is not limited to the aforementioned electric push rod; it can also be a linear motor, a ball screw module, etc. Other structural forms capable of enabling the scraper 412 to move radially along the transmission shaft 20 should also fall within the protection scope of this application. Taking the electric push rod as an example, the end of the telescopic rod of the electric push rod is fixedly connected to the back of the scraper 412. The extension and retraction of the telescopic rod can directly drive the scraper 412 to move radially along the transmission shaft 20.

[0040] Understandably, each scraper 412 has a matching drive component 411, which allows for individual adjustment of each scraper 412. Furthermore, multiple scrapers 412 are synchronized through a synchronous drive mechanism 50 to quickly adapt to different thickness requirements. Figure 2 As shown, taking an electric linear actuator as an example, the electric linear actuator has a guide protrusion 4111 at the top and a guide pin 4112 at the bottom. The adjustment mechanism 40 also has a structure that guides and cooperates with the guide protrusion 4111 and the guide pin 4112. Specifically, the adjustment mechanism 40 also includes a mounting shell 42 and a drive assembly 43. The mounting shell 42 is fixed to the outside of the transmission shaft 20. The interior of the mounting shell 42 forms an installation space for accommodating the drive component 411. The top wall of the installation space is provided with a guide groove 421 that slides and cooperates with the guide protrusion 4111. The guide groove 421 extends radially along the transmission shaft 20. The drive assembly 43 drives the guide pin 4112 to make the guide protrusion 4111 slide along the guide groove 421.

[0041] The guide protrusion 4111 is integrally formed on the top of the electric push rod, while the guide pin 4112 is fixedly installed on the bottom of the electric push rod. The guide protrusion 4111 and the guide groove 421 are in a sliding fit relationship, and the sliding direction is limited to the radial direction of the drive shaft 20. This ensures that when the electric push rod drives the scraper 412 to move, the position is adjusted only radially, avoiding offset that would affect the scraping accuracy. The guide pin 4112 cooperates with the drive component 43 in the adjustment mechanism 40 to receive the power transmitted by the synchronous drive mechanism 50, thereby realizing the synchronous adjustment of multiple drive components 411.

[0042] Specifically, the mounting housing 42 is a cylindrical structure with open side walls, and its inner wall is coaxially fixedly connected to the drive shaft 20, allowing it to rotate synchronously with the drive shaft 20. The interior of the mounting housing 42 forms a closed mounting space, the number of which is the same as the number of drive components 411, and the size of the mounting space matches the external size of the drive components 411, capable of accommodating all drive components 411 and ensuring their stable installation.

[0043] The top wall of the installation space is provided with a guide groove 421 extending radially along the drive shaft 20. The cross-sectional shape and length of the guide groove 421 match the guide protrusion 4111 on the top of the drive member 411. The guide protrusion 4111 is embedded in the guide groove 421 and forms a sliding fit. When the drive member 411 moves radially, the guide protrusion 4111 slides along the guide groove 421, which can strictly limit the movement direction of the drive member 411 and prevent it from circumferentially offset or tilting. This ensures that the scraper 412 always moves radially closer to or further away from the inner wall of the evaporation chamber 11, thus guaranteeing the film scraping accuracy.

[0044] The drive assembly 43 is arranged in the mounting space inside the mounting housing 42, and is connected to the guide pin 4112 at the bottom of the drive member 411 and the synchronous drive mechanism 50. Its core function is to transmit the power of the synchronous drive mechanism 50 to the guide pin 4112, thereby driving the drive member 411 to slide radially along the guide groove 421.

[0045] During operation, when the position of a particular scraper 412 needs to be adjusted independently, the telescopic rod of the corresponding electric push rod can be controlled separately. Utilizing the sliding limiting structure between the guide protrusion 4111 and the guide groove 421 of the mounting housing 42, the scraper 412 can precisely approach or move away from the inner wall of the evaporation chamber 11, thereby correcting localized liquid film thickness deviations. Simultaneously, the guide pin 4112 provides the structural basis for the drive component 411 to receive the synchronous drive mechanism 50, thus accommodating both independent and synchronous adjustment requirements of the scraper 412.

[0046] like Figure 2 As shown, in an embodiment of the present invention, the drive assembly 43 includes a guide seat 431 and a drive seat 432. The guide seat 431 is fixedly installed in the mounting housing 42, and a guide hole 4311 is provided on the guide seat 431 for each drive member 411. The guide hole 4311 extends radially along the drive shaft 20. The drive seat 432 is rotatably installed in the mounting housing 42 and is drivenly connected to the synchronous drive mechanism 50. An arc-shaped hole 4321 is provided on the drive seat 432 for each drive member 411. The guide pin 4112 passes through the guide hole 4311 and the arc-shaped hole 4321 in sequence.

[0047] Specifically, the drive assembly 43 includes a guide seat 431 and a drive seat 432, both of which are installed inside the mounting housing 42 of the adjustment mechanism 40 and are coaxially arranged with the transmission shaft 20. When the liquid film is scraped, the guide seat 431 and the drive seat 432 are relatively stationary and rotate synchronously with the transmission shaft 20. When the scraper 412 is adjusted synchronously, the drive seat 432 can rotate relative to the guide seat 431, thereby pushing the guide pin 4112 to move radially along the guide hole 4311, so as to realize the adjustment of the radial position of the drive component 411.

[0048] like Figure 2 and Figure 3 As shown, the guide seat 431 is a circular plate structure, fixedly connected to the inner wall of the mounting shell 42 by fasteners. Since the mounting shell 42 is also fixedly connected to the drive shaft 20, the guide seat 431 rotates synchronously with the drive shaft 20 and the mounting shell 42. A guide hole 4311 is provided on the guide seat 431 corresponding to the guide pin 4112 of each drive member 411. This guide hole 4311 extends radially along the drive shaft 20, and its diameter matches the diameter of the guide pin 4112. The end of the guide pin 4112 away from the drive member 411 slidably passes through the guide hole 4311, thus restricting its movement to only radial direction and preventing circumferential offset.

[0049] like Figure 2 and Figure 4 As shown, the drive seat 432 is a circular plate-shaped structure with dimensions adapted to the guide seat 431. It is located on the side of the guide seat 431 away from the drive member 411 and achieves rotational engagement with the inner wall of the mounting housing 42 through bearings. The drive seat 432 can rotate relative to the mounting housing 42 and the guide seat 431 around the axis of the drive shaft 20, and simultaneously revolves with the drive shaft 20 as a whole. An arc-shaped hole 4321 is provided on the drive seat 432 corresponding to each guide hole 4311. This arc-shaped hole 4321 extends in an arc shape with the axis of the drive shaft 20 as its center. One end of the guide pin 4112 passes through the guide hole 4311 and extends further into the arc-shaped hole 4321, forming a mating structure in which the guide pin 4112 is simultaneously engaged in both the guide hole 4311 and the arc-shaped hole 4321. Furthermore, the drive seat 432 is connected to the synchronous drive mechanism 50 and can rotate relative to the guide seat 431 under the drive of the synchronous drive mechanism 50.

[0050] When multiple drive components 411 need to be adjusted synchronously, the synchronous drive mechanism 50 rotates the drive seat 432 relative to the guide seat 431. At this time, the arc-shaped hole 4321 fixed on the drive seat 432 rotates with the drive seat 432 and applies a radial thrust to the guide pin 4112 inserted therein. Since the guide pin 4112 is constrained by the guide hole 4311 and can only move radially, this thrust will push the guide pin 4112 to slide radially along the guide hole 4311, thereby causing all corresponding drive components 411 and their scrapers 412 to move synchronously closer to or further away from the inner wall of the evaporation chamber 11. This design allows the distance between all scrapers 412 and the inner wall to be adjusted uniformly and precisely, thereby quickly adapting to the liquid film thickness reference value required for different materials. Through this synchronous drive mechanism 50, not only can the overall uniformity of the liquid film on the inner wall of the evaporation chamber 11 be guaranteed, but the ability to quickly adjust to different liquid film requirements can also be significantly improved, enhancing the convenience of operation and process stability.

[0051] like Figure 1As shown, the synchronous drive mechanism 50 includes a second drive mechanism 51 and a transmission plate 52. The second drive mechanism 51 is mounted on the transmission shaft 20. The transmission plate 52 is connected to the output end of the second drive mechanism 51. Multiple transmission rods 521 are mounted on the transmission plate 52, extending axially along the transmission shaft 20 and passing through multiple drive seats 432, and are fixedly connected to the drive seats 432. An arc-shaped through hole 4312 for the transmission rods 521 to pass through is provided on the guide seat 431. Further, the second drive mechanism 51 includes a second motor 511 and a second reducer 512, with the second reducer 512 drivingly connected between the second motor 511 and the transmission plate 52.

[0052] The second motor 511 is a small servo motor, coaxially mounted on the lower end of the transmission shaft 20 via a bracket. Its output end is fixedly connected to the input end of the second reducer 512 via a coupling. The second reducer 512 is a worm gear reducer with a self-locking function, which prevents the drive seat 432 from rotating accidentally in the non-adjusted state, thereby ensuring the stability of the scraper 412 position. The output end of the reducer is fixed at the center position of the transmission plate 52, driving the transmission plate 52 to rotate around the axis of the transmission shaft 20.

[0053] The transmission plate 52 is a circular flat plate structure with multiple transmission rods 521 evenly arranged around its circumference. The number of transmission rods 521 matches the transmission requirements of the drive seats 432. The transmission rods 521 extend axially along the transmission shaft 20 and sequentially pass through the drive seats 432 in all the adjustment mechanisms 40. The transmission rods 521 and the drive seats 432 are connected by keys or pins to achieve a transmission engagement, ensuring that when the transmission plate 52 rotates, it can synchronously drive all the drive seats 432 to rotate relative to the guide seats 431. The guide seats 431 are correspondingly provided with arc-shaped through holes 4312 for guiding and positioning the transmission rods 521 when they rotate.

[0054] During operation, when the positions of all scrapers 412 need to be adjusted synchronously, the second motor 511 starts, and the power is transmitted to the transmission plate 52 after being reduced and increased in torque by the second reducer 512. This drives the transmission plate 52 and the transmission rod 521 to rotate around the transmission shaft 20. The transmission rod 521 further drives the drive seats 432 in all adjustment mechanisms 40 to rotate synchronously. Combined with the mating structure of the arc-shaped hole 4321 on the drive seat 432 and the guide pin 4112, all drive components 411 and scrapers 412 are finally pushed to move synchronously in the radial direction, realizing the uniform adjustment of the distance between the scrapers 412 and the inner wall of the evaporation chamber 11.

[0055] like Figure 1As shown, in some embodiments, the synchronous drive mechanism 50 further includes a positioning bearing 53, which is mounted on the drive shaft 20 and connected to the end of the drive rod 521 away from the second drive mechanism 51. The second motor 511, the second reducer 512, the transmission plate 52, and the positioning bearing 53 together constitute a synchronous adjustment power transmission system. The components are assembled collaboratively around the drive shaft 20 to form a compact and stable whole.

[0056] Specifically, the positioning bearing 53 is installed on the upper part of the drive shaft 20 near the top of the evaporation chamber 11. Its inner ring is interference-fitted with the upper end of the drive shaft 20, and its outer ring is fixedly connected to the upper end of all the drive rods 521. The outer ring provides radial positioning for the lower end of the drive rod 521, preventing radial displacement of the drive rod 521 due to gravity or power transmission during long-distance extension, thereby ensuring the stability and synchronization accuracy of the drive rod 521 when driving the drive seat 432 to rotate.

[0057] In some implementations, such as Figure 1 As shown, the first drive mechanism 30 is located on the top of the top cover 60 and includes a first motor 31 and a first reducer 32. The first reducer 32 is driven and connected between the first motor 31 and the transmission shaft 20.

[0058] Specifically, the first motor 31 and the first reducer 32 are both mounted on a bracket above the top cover 60, forming a stable power output unit. The first motor 31 is a servo motor with adjustable speed, which can flexibly adjust the output speed according to process requirements such as material viscosity and throughput. The first reducer 32 is a planetary gear reducer. Its input end is fixedly connected to the output shaft of the first motor 31 through a coupling, and its output end is fixedly connected to the upper end of the transmission shaft 20 through another set of couplings, forming a complete and compact power transmission path.

[0059] like Figure 1 As shown, in an embodiment of the present invention, the bottom of the reactor 10 is provided with a bearing seat 14 for connecting the drive shaft 20, and there are multiple material outlets 13 surrounding the outer periphery of the bearing seat 14.

[0060] Specifically, a bearing seat 14 is fixedly installed at the center of the bottom of the reactor 10. The bearing seat 14 adopts a vertical rolling bearing structure. Its outer ring is fixedly connected to the mounting hole at the bottom of the reactor 10 by bolts or other fasteners. The inner ring is interference-fitted with the lower end of the drive shaft 20, forming the bottom rotation support point of the drive shaft 20. The material outlet 13 is arranged in a ring around the bearing seat 14, that is, the bearing seat 14 is located at the center of the ring-shaped material outlet 13. A gap is left between the inner wall of the ring-shaped material outlet 13 and the outer wall of the bearing seat 14, while the outer wall is seamlessly connected to the inner wall of the bottom of the reactor 10. This ring structure design fully optimizes the spatial layout of the bottom of the reactor 10, allowing the concentrated material after the scraped film evaporation treatment in the evaporation chamber 11 to flow downward along the inner wall to the bottom and then smoothly discharged through the ring-shaped material outlet 13, effectively avoiding the material accumulation and residue problems that are prone to occur with traditional non-ring-shaped outlets. At the same time, this layout also provides reasonable space for the installation of the bearing seat 14, achieving compatibility between the transmission support and material discharge functions.

[0061] Furthermore, such as Figure 1 As shown, the medium channels located on the side wall of the evaporation chamber 11 are multi-segment independent structures and are arranged along the axial direction of the reactor 10. Each segment of the medium channel has a medium inlet and a medium outlet at both ends. The medium channels can be spiral-shaped to increase the heat exchange area.

[0062] Specifically, the medium channels within the sidewall of the evaporation chamber 11 adopt a multi-segment independent structure design, which are arranged sequentially from top to bottom along the axial direction of the reactor 10 as the first medium channel 71, the second medium channel 72, and the third medium channel 73. The three channels are arranged in a coaxial ring with intervals, and each segment is an independent sealed cavity that is not directly connected to each other.

[0063] Each media channel is individually equipped with a media inlet and a media outlet: the first media channel 71 has a first media inlet 711 and a first media outlet 712; the second media channel 72 has a second media inlet 721 and a second media outlet 722; and the third media channel 73 has a third media inlet 731 and a third media outlet 732. Each inlet and outlet is independently connected to an external pipeline, allowing for independent flow of the heat transfer medium within each channel.

[0064] This segmented design breaks down the traditional single-segment long channel into multiple short channels, offering the following advantages: First, it significantly reduces the flow resistance of the heat transfer medium within the channel, decreasing the demand for medium delivery pressure and thus reducing energy consumption. Second, it shortens the flow path of the heat transfer medium, effectively reducing the natural heat decay during flow and avoiding the axial temperature difference problem common in traditional long channels, such as high bottom temperature and low top temperature. This ensures uniform temperature across the upper and lower regions of the evaporation chamber 11's inner wall, preventing insufficient local temperature from affecting evaporation efficiency. Third, each channel is independently powered, allowing for individual adjustment of the temperature of the heat transfer medium within the corresponding channel based on the heat exchange requirements of different height areas within the evaporation chamber 11 (such as the heat exchange difference between the initial liquid film at the material inlet 12 and the concentrated liquid film at the bottom), further improving heat exchange accuracy and evaporation efficiency.

[0065] Furthermore, adjacent media channels are connected by a circulating heating device 80, which has a built-in delivery pump. The circulating heating device 80 enables the connection between adjacent media channels, and each circulating heating device 80 has a built-in delivery pump to drive the heat transfer medium to circulate within the channel and maintain a stable pressure.

[0066] like Figure 1 As shown, the specific connection method is as follows: The first medium outlet 712 of the first medium channel 71 is connected to the inlet of the first circulating heating device 80 through a pipeline. The outlet of the circulating heating device 80 is then connected to the second medium inlet 721 of the second medium channel 72 through a pipeline, forming the first circulation path from the first medium channel 71 through the circulating heating device 80 to the second medium channel 72. Similarly, the second medium outlet 722 of the second medium channel 72 is connected to the inlet of the second circulating heating device 80 through a pipeline. The outlet of the circulating heating device 80 is then connected to the third medium inlet 731 of the third medium channel 73 through a pipeline, forming the second circulation path. The first medium inlet 711 and the third medium outlet 732 are respectively connected to the outlet and inlet of an external medium circulation device.

[0067] During operation, the external heat transfer medium first enters the lowest first medium channel 71, where it exchanges heat with the liquid film at the bottom of the evaporation chamber 11, reducing its temperature. It then flows into the corresponding circulating heating device 80. An internal delivery pump drives the low-temperature heat transfer medium to heat up within the device. The heated medium is then transported to the upper second medium channel 72, where it exchanges heat with the liquid film in the middle of the evaporation chamber 11. This cycle continues, ultimately completing the continuous flow and heat exchange of the heat transfer medium within the three channels. This design ensures the flow dynamics of the medium through the delivery pump and compensates for heat loss through the circulating heating device 80, ensuring that the heat transfer medium in each medium channel maintains the target temperature, thereby further improving the temperature uniformity of the inner wall of the evaporation chamber 11.

[0068] By designing the media channel as a three-section independent structure, independent temperature control of the upper, middle, and lower regions within the evaporation chamber 11 can be achieved, significantly improving the temperature adaptability of the reactor 10 to different materials. Furthermore, by using a circulating heating device 80 to connect adjacent media channels, not only is the transport efficiency of the heat transfer medium between sections enhanced, but more importantly, each channel can independently circulate and heat the medium, effectively preventing heat loss during long-distance transport and avoiding a decrease in evaporation efficiency due to temperature drops.

[0069] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A vertical scraped-film reactor, characterized in that, The vertical scraped film reactor includes: The reactor (10) has an evaporation chamber (11) inside. A drive shaft (20) is axially inserted through the reactor (10) and rotatably disposed on the reactor (10). A first drive mechanism (30) is used to drive the transmission shaft (20). Adjustment mechanisms (40) are arranged in multiples and spaced apart along the axial direction of the drive shaft (20). Each adjustment mechanism (40) includes at least one set of scraper assemblies (41). Each scraper assembly (41) includes a drive member (411) and a scraper (412). The drive member (411) is used to drive the scraper (412) to move radially along the drive shaft (20) to approach or move away from the inner wall of the evaporation chamber (11). A synchronous drive mechanism (50) is used to synchronously drive the drive members (411) on the plurality of adjustment mechanisms (40) to move radially along the transmission shaft (20). The synchronous drive mechanism (50) is mounted on the transmission shaft (20) and is drivenly connected to the plurality of drive members (411).

2. The vertical scraped film reactor according to claim 1, characterized in that, The driving component (411) has a guide protrusion (4111) at the top and a guide pin (4112) at the bottom. The adjusting mechanism (40) also includes: Mounting housing (42) is fixed to the outside of the drive shaft (20). The interior of the mounting housing (42) forms an installation space for accommodating the drive component (411). The top wall of the installation space is provided with a guide groove (421) that slides with the guide protrusion (4111). The guide groove (421) extends radially along the drive shaft (20). A drive assembly (43) is connected to the guide pin (4112) and the synchronous drive mechanism (50). The drive assembly (43) is used to drive the guide pin (4112) so that the guide protrusion (4111) slides along the guide groove (421).

3. The vertical scraped film reactor according to claim 2, characterized in that, The driving component (43) includes: The guide seat (431) is fixedly installed inside the mounting shell (42). The guide seat (431) is provided with a guide hole (4311) corresponding to each of the driving components (411). The guide hole (4311) extends radially along the transmission shaft (20). The drive seat (432) is rotatably mounted in the mounting shell (42) and driven by the synchronous drive mechanism (50). The drive seat (432) is provided with an arc-shaped hole (4321) corresponding to each of the drive components (411). The guide pin (4112) passes through the guide hole (4311) and the arc-shaped hole (4321) in sequence.

4. The vertical scraped film reactor according to claim 3, characterized in that, The synchronous drive mechanism (50) includes: The second drive mechanism (51) is mounted on the drive shaft (20); The transmission plate (52) is connected to the output end of the second drive mechanism (51). Multiple transmission rods (521) are installed on the transmission plate (52). The transmission rods (521) extend along the axial direction of the transmission shaft (20), pass through multiple drive seats (432), and are fixedly connected to the drive seats (432). The guide seat (431) has an arc-shaped through hole (4312) for the transmission rod (521) to pass through.

5. The vertical scraped film reactor according to claim 4, characterized in that, The second drive mechanism (51) includes a second motor (511) and a second reducer (512), and the second reducer (512) is driven to connect the second motor (511) and the transmission plate (52).

6. The vertical scraped film reactor according to claim 4, characterized in that, The synchronous drive mechanism (50) further includes a positioning bearing (53), which is mounted on the drive shaft (20) and connected to the end of the drive rod (521) away from the second drive mechanism (51).

7. The vertical scraped film reactor according to claim 1, characterized in that, The vertical scraped membrane reactor also includes a top cover (60) located on top of the reactor (10). The top cover (60) has a collection chamber (61) that communicates with the evaporation chamber (11). The collection chamber (61) is equipped with a gas-liquid separation device (62) and a steam outlet (63) that communicates with the outside.

8. The vertical scraped film reactor according to claim 7, characterized in that, The first drive mechanism (30) is located on the top of the top cover (60) and includes a first motor (31) and a first reducer (32). The first reducer (32) is driven to connect the first motor (31) and the transmission shaft (20).

9. The vertical scraped film reactor according to claim 1, characterized in that, The evaporation chamber (11) has a material inlet (12) at the top and a material outlet (13) at the bottom.

10. The vertical scraped film reactor according to claim 9, characterized in that, The bottom of the reactor (10) is provided with a bearing seat (14) that is rotatably connected to the drive shaft (20), and there are multiple material outlets (13) surrounding the outer periphery of the bearing seat (14).

11. The vertical scraped film reactor according to any one of claims 1 to 10, characterized in that, The sidewall of the evaporation chamber (11) is provided with a medium channel for introducing the heat-conducting medium.

12. The vertical scraped film reactor according to claim 11, characterized in that, The medium channel is spiral-shaped.

13. The vertical scraped film reactor according to claim 11, characterized in that, The medium channel comprises multiple segments arranged along the axial direction of the reactor (10), and each segment of the medium channel has a medium inlet and a medium outlet at both ends.

14. The vertical scraped film reactor according to claim 11, characterized in that, The two adjacent media channels are connected by a circulating heating device (80), which has a built-in delivery pump.

15. The vertical scraped film reactor according to any one of claims 1 to 10, characterized in that, The scrapers (412) on adjacent adjustment mechanisms (40) are arranged at an angle offset along the circumference of the drive shaft (20).

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