Device and method for the preparation of ethyl 3-ethoxypropionate

Abstract

The application relates to the technical field of 3-ethoxypropionic acid ethyl ester preparation, and provides a 3-ethoxypropionic acid ethyl ester preparation device and a preparation method. The 3-ethoxypropionic acid ethyl ester preparation device comprises a thin film evaporator main body, a supporting shaft, a driving mechanism and a roller shaft. The thin film evaporator main body has an evaporation cavity, the supporting shaft is rotatably arranged in the evaporation cavity, the driving mechanism is connected with the power output end of the supporting shaft, and is used for driving the supporting shaft to rotate around the axis of the supporting shaft. The roller shaft is rotatably arranged on the supporting shaft around the axis of the roller shaft, and the roller shaft is in rolling cooperation with the inner wall of the evaporation cavity. The 3-ethoxypropionic acid ethyl ester preparation method uses the above-mentioned 3-ethoxypropionic acid ethyl ester preparation device to complete the evaporation and purification of 3-ethoxypropionic acid ethyl ester. The 3-ethoxypropionic acid ethyl ester preparation device and the preparation method can improve the technical problem that the evaporation and purification efficiency of 3-ethoxypropionic acid ethyl ester is low due to the non-uniformity of the thin film in the related art.

Description

Technical Field

[0001] This application relates to the field of ethyl 3-ethoxypropionate preparation technology, and in particular to an apparatus and method for preparing ethyl 3-ethoxypropionate. Background Technology

[0002] The preparation of ethyl 3-ethoxypropionate includes its purification. This purification is crucial to ensuring its safety, quality, and effectiveness, and is essential for the quality of the ethyl 3-ethoxypropionate product and its health implications in certain applications. Only high-purity ethyl 3-ethoxypropionate can guarantee product stability and consistency, and effectively prevent chemical reactions between ethyl 3-ethoxypropionate and other impurities, which could produce harmful substances and damage human health.

[0003] In the purification of ethyl 3-ethoxypropionate, evaporation, drying, and condensation are common steps. A thin-film evaporator is typically used for heating and evaporating the ethyl 3-ethoxypropionate. However, in related technologies, the scraper of the thin-film evaporator wears out quickly. This wear prevents the raw material from being evenly distributed on the inner wall, resulting in incomplete evaporation in some areas and affecting evaporation efficiency. Furthermore, it leads to unstable quality of the dried product. Summary of the Invention

[0004] This application provides an apparatus and method for preparing ethyl 3-ethoxypropionate, which can improve the technical problem of low evaporation and purification efficiency of ethyl 3-ethoxypropionate due to uneven film thickness in related technologies.

[0005] In a first aspect, embodiments of this application provide an apparatus for preparing ethyl 3-ethoxypropionate, comprising:

[0006] The main body of the thin-film evaporator has an evaporation cavity;

[0007] A support shaft is rotatably disposed within the evaporation cavity;

[0008] A drive mechanism, the power output end of which is connected to the support shaft, for driving the support shaft to rotate about its axis; and

[0009] A roller is rotatably mounted on the support shaft about its axis, and the roller rolls into contact with the inner wall of the evaporation cavity.

[0010] The technical solution described above in this application embodiment has at least the following technical effects: After the ethyl 3-ethoxypropionate preparation device is started, the drive mechanism drives the support shaft to rotate, and the support shaft drives the roller connected to it to rotate around the support shaft. At the same time, under the action of centrifugal force and friction, the roller rolls on the inner wall of the evaporation cavity, squeezing the ethyl 3-ethoxypropionate raw material injected into the ethyl 3-ethoxypropionate preparation device onto the inner wall of the evaporation cavity to compress it into a thin film. Since the friction between the roller and the inner wall is mainly rolling friction, it is not easy to wear, and it can better fit with the inner wall of the evaporation cavity, so that the film thickness is uniform during evaporation, which can improve the evaporation and purification efficiency of ethyl 3-ethoxypropionate.

[0011] In some embodiments, a plurality of rolling grooves are provided on the outer wall of the roller, the rolling grooves extend along the axial direction of the roller, and the rolling grooves are evenly spaced along the circumferential direction of the roller.

[0012] The inner wall of the evaporation cavity is provided with a plurality of rolling protrusions, which extend along the height direction of the thin film evaporator body and are evenly spaced along the circumference of the evaporation cavity; the rolling protrusions are used to fit and cooperate with the rolling groove.

[0013] In some embodiments, the top of the roller is provided with a plurality of guide grooves, the guide grooves pointing from the center of the top of the roller to the compaction groove.

[0014] In some embodiments, the compaction groove is an arc-shaped groove, and the roller forms an arc-shaped protrusion between two adjacent compaction grooves; the compaction protrusion is an arc-shaped protrusion, and the compaction groove and the compaction protrusion fit together completely when they are engaged.

[0015] In some embodiments, the ethyl 3-ethoxypropionate preparation apparatus further includes a support, one end of which is fixed to the support shaft, and the roller is rotatably disposed at the other end of the support about the axis of the roller.

[0016] The support shaft has a first transmission channel inside;

[0017] The support has a second transmission channel inside, which is connected to one end of the first transmission channel. The other end of the second transmission channel penetrates the inner wall of the support to form a liquid injection port, which is located above the top of the roller and is used to deliver ethyl 3-ethoxypropionate to be evaporated to the top of the roller.

[0018] In some embodiments, the ethyl 3-ethoxypropionate preparation apparatus further includes:

[0019] A rotary joint is disposed at the top end of the support shaft; and

[0020] A feed pipe is connected to the rotary joint and communicates with the first transmission channel through the rotary joint, for injecting ethyl 3-ethoxypropionate to be evaporated into the evaporation cavity.

[0021] In some embodiments, the end of the second transmission channel near the support shaft is higher than the end of the second transmission channel near the roller.

[0022] In some embodiments, the support includes:

[0023] The fixing part has one end fixed to the support shaft;

[0024] A clamping part, one end of which is hinged to one end of the fixing part;

[0025] A locking mechanism having a locked state and an unlocked state: when in the locked state, the locking mechanism fixes the position of the clamping part relative to the fixed part; when in the unlocked state, the clamping part can rotate relative to the fixed part.

[0026] The roller is located between the fixing part and the clamping part, and the two ends of the roller are rotatably and detachably connected to the other end of the fixing part and the other end of the clamping part, respectively.

[0027] In some embodiments, the fixing part has at least one locking groove, the locking groove including an inlet groove and a locking groove communicating with the inlet groove; the clamping part has at least one sliding hole, the position of the sliding hole corresponding one-to-one with the position of the locking groove; the locking mechanism includes:

[0028] A connecting seat, rotatably disposed at the bottom of the clamping portion; and

[0029] A connecting rod, one end of which passes through the sliding hole and is fixed to the connecting seat, and the other end of which has a locking pin. The connecting rod and the locking pin groove correspond one-to-one. The locking pin is used to enter the locking groove from the inlet groove and abut against the bottom wall of the locking groove.

[0030] Secondly, this application provides a method for preparing ethyl 3-ethoxypropionate, using the ethyl 3-ethoxypropionate preparation apparatus described in any of the above embodiments. The method for preparing ethyl 3-ethoxypropionate includes:

[0031] Ethyl 3-ethoxypropionate to be evaporated is introduced into the evaporation cavity;

[0032] The drive mechanism drives the support shaft to rotate around the axis of the support shaft. While the support shaft drives the roller to rotate around the axis of the support shaft, the roller rolls in contact with the inner wall of the evaporation cavity.

[0033] After the ethyl 3-ethoxypropionate to be evaporated enters the evaporation cavity, it flows down the outer wall of the roller, is pressed by the roller onto the inner wall of the evaporation cavity to form a thin film, and is evaporated into ethyl 3-ethoxypropionate gas and transported out of the evaporation cavity. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the apparatus for preparing ethyl 3-ethoxypropionate provided in the embodiments of this application;

[0036] Figure 2 This is a schematic diagram of the structure of the roller provided in the embodiments of this application;

[0037] Figure 3 A schematic diagram of the structure in which the roller mates with the inner wall of the evaporation cavity, as provided in an embodiment of this application;

[0038] Figure 4 A schematic cross-sectional view of the bracket and support shaft provided in an embodiment of this application;

[0039] Figure 5 This is a schematic diagram of the structure of the bracket and roller in cooperation with the embodiment of this application;

[0040] Figure 6 for Figure 5 Enlarged view of a portion of point A in the middle;

[0041] Figure 7 for Figure 5 A schematic diagram of the structure from another perspective when the bracket and roller are in contact;

[0042] Figure 8 for Figure 7 Enlarged view of a section at point B in the middle;

[0043] Figure 9 A schematic diagram of the bracket and roller when the locking mechanism provided in the embodiment of this application is in the unlocked state;

[0044] Figure 10A schematic diagram of the structure of the fixing part provided in the embodiment of this application;

[0045] Figure 11 for Figure 10 Enlarged view of a section at point C.

[0046] The following are the labeling elements in the figure:

[0047] 100. Apparatus for preparing ethyl 3-ethoxypropionate; 10. Thin-film evaporator body; 1001. Evaporation cavity; 11. Rolling protrusion; 20. Support shaft; 2001. First transmission channel; 30. Drive mechanism; 40. Roller; 4001. Rolling groove; 4002. Guide groove; 50. Support; 5001. Second transmission channel; 5002. Liquid injection port; 51. Fixing part; 5101. Locking pin groove; 51011. Inlet groove; 51012. Locking groove; 52. Clamping part; 5201. Sliding hole; 53. Locking mechanism; 531. Connecting seat; 532. Connecting rod; 5321. Locking pin; 60. Rotary joint; 70. Feed pipe. Detailed Implementation

[0048] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0050] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0051] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0052] Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0053] In this application, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0054] It should be noted that in this application, the words "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of words such as "in some embodiments," "exemplarily," and "for example" is intended to present related concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0055] The preparation of ethyl 3-ethoxypropionate includes its purification. This purification is crucial to ensuring its safety, quality, and effectiveness, and is essential for the quality of ethyl 3-ethoxypropionate products and their health implications in certain applications. Only high-purity ethyl 3-ethoxypropionate can guarantee the product's stability, taste, aroma, and quality, and effectively prevent chemical reactions between ethyl 3-ethoxypropionate and other impurities, which could produce harmful substances and damage human health.

[0056] In the purification of ethyl 3-ethoxypropionate, evaporation, drying, and condensation are common steps, with a thin-film evaporator typically used for heating and evaporation. Related ethyl 3-ethoxypropionate preparation apparatus includes a shell and a scraper. The scraper is used to spread the ethyl 3-ethoxypropionate to be evaporated onto the inner wall of the shell. Because the scraper slides against the inner wall of the shell through friction, it wears down rapidly over time. Once worn, the scraper cannot maintain constant contact with the inner wall, resulting in uneven coverage of the ethyl 3-ethoxypropionate on the shell's inner wall. This affects the formation, thickness, and uniformity of the thin film. An unevenly formed film prevents some areas from evaporating completely, affecting evaporation efficiency and leading to unstable quality of the dried product.

[0057] Based on this, in order to improve the technical problem of low evaporation and purification efficiency of ethyl 3-ethoxypropionate due to thin film inhomogeneity in related technologies, the embodiments of this application provide the following solutions.

[0058] Please see Figure 1 The apparatus 100 for preparing ethyl 3-ethoxypropionate provided in this application embodiment will now be described. The apparatus 100 for preparing ethyl 3-ethoxypropionate is used for heating and evaporating ethyl 3-ethoxypropionate. The apparatus 100 includes a thin-film evaporator body 10, a support shaft 20, a drive mechanism 30, and a roller 40, wherein:

[0059] The thin-film evaporator body 10 has an evaporation cavity 1001.

[0060] The support shaft 20 is rotatably disposed within the evaporation cavity 1001.

[0061] The power output end of the drive mechanism 30 is connected to the support shaft 20, and is used to drive the support shaft 20 to rotate around the axis of the support shaft 20.

[0062] The roller 40 is rotatably mounted on the support shaft 20 about its axis, and the roller 40 rolls into contact with the inner wall of the evaporation cavity 1001 to extrude the ethyl 3-ethoxypropionate to be evaporated into a thin film on the inner wall of the evaporation cavity 1001.

[0063] It can be understood that the thin-film evaporator body 10 is the core part of the ethyl 3-ethoxypropionate preparation device 100, and generally includes an evaporation cavity 1001, with the inner wall of the evaporation cavity 1001 serving as the heating surface. During operation, the substance to be evaporated enters the evaporation cavity 1001, forming a thin film on the inner wall of the evaporation cavity 1001, converting the liquid substance into vapor and discharging it from the device, thereby achieving the purpose of evaporation.

[0064] The support shaft 20 is a shaft-like component capable of bearing a large load. The support shaft 20 is located at the center of the evaporation cavity 1001 and is used to connect the roller 40 and support the rotation of the roller 40.

[0065] The drive mechanism 30 refers to a mechanism capable of providing power or power conversion, such as a motor, electric motor, or integrated motor-gear reducer, but not limited to these. The drive mechanism 30 is located outside the thin-film evaporator body 10, and the output shaft of the drive mechanism 30 is connected to the support shaft 20 to provide power for the rotation of the support shaft 20.

[0066] The roller 40 is used to scrape the ethyl 3-ethoxypropionate to be evaporated onto the inner wall of the evaporation cavity 1001 to form a thin film and maintain the shape of the film, ensuring that the liquid raw material is uniformly heated and evaporated. The rotation axis of the roller 40 can be parallel to the rotation axis of the support shaft 20.

[0067] As can be seen from the above, the ethyl 3-ethoxypropionate preparation apparatus 100 provided in this application embodiment, compared with the prior art, after the ethyl 3-ethoxypropionate preparation apparatus 100 is started, the ethyl 3-ethoxypropionate to be evaporated is injected into the evaporation cavity 1001 of the thin film evaporator body 10. The driving mechanism 30 drives the support shaft 20 to rotate, and the support shaft 20 drives the roller 40 connected to it to rotate around the support shaft 20. At the same time, under the action of centrifugal force and friction, the roller 40 rolls on the inner wall of the evaporation cavity 1001, squeezing the ethyl 3-ethoxypropionate to be evaporated injected into the ethyl 3-ethoxypropionate preparation apparatus 100 onto the inner wall of the evaporation cavity 1001 to form a thin film. Since the roller 40 and the inner wall are subject to rolling friction, they are not easily worn and can better fit with the inner wall of the evaporation cavity 1001, resulting in a uniform film thickness during evaporation.

[0068] In some embodiments, please refer to Figures 1 to 3 Multiple pressing grooves 4001 are provided on the outer wall of the roller 40. The pressing grooves 4001 extend along the axial direction of the roller 40 and are evenly spaced along the circumference of the roller 40. Multiple pressing protrusions 11 are provided on the inner wall of the evaporation cavity 1001. The pressing protrusions 11 extend along the height direction of the thin film evaporator body 10 and are evenly spaced along the circumference of the evaporation cavity 1001. The pressing protrusions 11 are used to fit and cooperate with the pressing grooves 4001.

[0069] It is understandable that the rolling groove 4001 exists on the surface of the roller 40 and is a long strip groove with a certain width and depth. The rolling protrusion 11 protrudes from the inner wall of the evaporation cavity 1001 and presents a long strip protrusion of a certain height. The evaporation cavity 1001 is a cylindrical cavity, and the rotation axis of the roller 40 can be parallel to the inner wall of the evaporation cavity 1001.

[0070] With this configuration, after the ethyl 3-ethoxypropionate preparation apparatus 100 is started, the drive mechanism 30 drives the support shaft 20 to rotate, thereby causing the roller 40 to rotate. This allows the compaction groove 4001 and the compaction protrusion 11 to cooperate, thus compressing the ethyl 3-ethoxypropionate to be evaporated. This results in the formation of a uniformly thick film of ethyl 3-ethoxypropionate on the inner wall of the evaporation cavity 1001, which improves the efficiency of evaporating ethyl 3-ethoxypropionate and ensures the quality of the product. Simultaneously, the cooperation between the compaction groove 4001 and the compaction protrusion 11 increases the contact area between the roller 40 and the inner wall of the evaporation cavity 1001, further improving the efficiency and quality of evaporating ethyl 3-ethoxypropionate and reducing wear on the roller 40 and the inner wall of the evaporation cavity 1001.

[0071] In some embodiments, please refer to Figure 2 The top of the roller 40 is provided with multiple guide grooves 4002, which point from the center of the top of the roller 40 to the compaction groove 4001.

[0072] It can be understood that the guide channel 4002 is a spatial structure used to guide fluid flow. It can be a channel of various shapes, such as a long strip, a V-shape, or a curved shape. The guide channel 4002 changes the direction, speed, or pressure of fluid flow through its shape, size, and position, thereby improving flow efficiency, reducing resistance, and reducing energy loss.

[0073] With this configuration, the ethyl 3-ethoxypropionate to be evaporated is injected into the evaporation cavity 1001 and falls on top of the roller 40. It is then guided by the guide groove 4002 to flow into the compaction groove 4001 and down along it. This more concentrated flow of the ethyl 3-ethoxypropionate at the top of the roller 40 prevents it from being dispersed outside the compaction groove 4001, improving fluid transfer efficiency and controllability. This makes the flow of the ethyl 3-ethoxypropionate to be evaporated more rational and effective, thereby increasing evaporation efficiency and reducing ineffective losses.

[0074] Optionally, please refer to Figure 2 Each guide groove 4002 is evenly distributed on the top of the roller 40, which can avoid uneven flow of the ethyl 3-ethoxypropionate to be evaporated and concentration in certain areas, thereby ensuring the transfer efficiency and uniformity of the ethyl 3-ethoxypropionate to be evaporated on the top of the roller 40, reducing liquid retention and improving work efficiency.

[0075] In some embodiments, please refer to Figure 2 and Figure 3 The compaction groove 4001 is an arc-shaped groove, and the roller 40 forms an arc-shaped protrusion between two adjacent compaction grooves 4001. The compaction protrusion 11 is an arc-shaped protrusion, and the compaction groove 4001 and the compaction protrusion 11 fit together completely when they are engaged.

[0076] It is understandable that the outer edge of the cross-section of the compaction groove 4001 (the section perpendicular to the axis of the roller 40) is arc-shaped, and the outer edge of the cross-section of the compaction protrusion 11 (the section perpendicular to the axis of the roller 40) is also arc-shaped. This enhances the meshing performance of the compaction groove 4001 and the compaction protrusion 11, allowing them to better cooperate with each other, thereby improving meshing efficiency and precision. Compared to other shapes, the arc-shaped cross-section reduces the vertical friction between the inner wall of the evaporation cavity 1001 and the roller 40, making compaction easier and more energy-efficient, thus reducing friction and energy loss during operation.

[0077] With this configuration, the roller 40 meshes with the inner wall of the evaporation cavity 1001, resulting in less friction and slower wear of the roller 40, thus extending the service life of the ethyl 3-ethoxypropionate preparation apparatus 100. Simultaneously, the arc-shaped cross-section of the outer edge provides a wider contact surface between the rolling groove 4001 and the rolling protrusion 11, allowing for better compaction of the ethyl 3-ethoxypropionate to be evaporated onto the inner wall of the evaporation cavity 1001, resulting in a more uniform distribution of the ethyl 3-ethoxypropionate and improved evaporation efficiency.

[0078] In some embodiments, please refer to Figure 1 , Figure 4 , Figure 5 and Figure 6 The ethyl 3-ethoxypropionate preparation apparatus 100 also includes a support 50, one end of which is fixed to a support shaft 20. A roller 40 is rotatably disposed at the other end of the support 50 around its axis. A first transmission channel 2001 is formed inside the support shaft 20. A second transmission channel 5001 is formed inside the support 50, and one end of the second transmission channel 5001 is connected to the first transmission channel 2001. The other end of the second transmission channel 5001 penetrates the inner wall of the support 50 to form a liquid injection port 5002. The liquid injection port 5002 is located above the top of the roller 40 and is used to transport the ethyl 3-ethoxypropionate to be evaporated to the top of the roller 40.

[0079] It can be understood that the function of the bracket 50 is to connect the support shaft 20 and the roller 40, and to provide support for the roller 40. The bracket 50 can be a bracket structure of various shapes, such as a right-angle bracket, a U-shaped bracket, a T-shaped bracket, etc. The first transmission channel 2001 and the second transmission channel 5001 are liquid transmission channels. A liquid transmission channel refers to a pipe or channel used to transmit liquid. Liquid transmission channels can be divided into high-pressure liquid transmission channels, low-pressure liquid transmission channels, etc. The injection port 5002 can be located on the side or bottom of the second transmission channel 5001, so as to inject the ethyl 3-ethoxypropionate to be evaporated into the top of the roller 40.

[0080] With this configuration, the ethyl 3-ethoxypropionate to be evaporated sequentially passes through the first transfer channel 2001, the second transfer channel 5001, and the injection port 5002, and is output to the top of the roller 40. From the top of the roller 40, it flows towards the outer wall of the roller 40, and then flows down the outer wall, where it is pressed onto the inner wall of the evaporation cavity 1001 to form a thin film. This avoids the situation where, when the ethyl 3-ethoxypropionate to be evaporated is directly injected from the top of the evaporation cavity 1001, some of the ethyl 3-ethoxypropionate to be evaporated would fall directly to the bottom of the evaporation cavity 1001, resulting in incomplete evaporation.

[0081] In some embodiments, please refer to Figure 1 The ethyl 3-ethoxypropionate preparation apparatus 100 also includes a rotary joint 60 and a feed pipe 70. Wherein:

[0082] The rotary joint 60 is located at the top of the support shaft 20.

[0083] The feed pipe 70 is connected to the rotary joint 60 and is connected to the first transmission channel 2001 through the rotary joint 60, for injecting ethyl 3-ethoxypropionate to be evaporated into the evaporation cavity 1001.

[0084] It can be understood that a rotary joint 60 is a mechanical part used to connect two mutually rotating components, which can transfer fluid during rotation. The rotary joint 60 can be of various types; for example, it can employ ball bearing technology, enabling the two components to rotate along mutually perpendicular axes. The feed pipe 70 refers to a pipe that transports materials or liquids into equipment or a system.

[0085] With this configuration, the ethyl 3-ethoxypropionate to be evaporated sequentially passes through the feed pipe 70 and the rotary joint 60 into the first transmission channel 2001 inside the support shaft 20. The rotary joint 60 has good sealing performance, which can effectively prevent media leakage and ensure the stability and long-term safety of the ethyl 3-ethoxypropionate preparation device 100. Since the rotary joint 60 can connect two mutually rotating components and transfer liquids during rotation, the ethyl 3-ethoxypropionate to be evaporated enters the first transmission channel 2001 through the rotary joint 60 during the operation of the ethyl 3-ethoxypropionate preparation device 100 without affecting its operation. At the same time, the feed pipe 70 can be fixed to the thin-film evaporator body 10 for easy installation and maintenance, effectively preventing the feed pipe 70 from breaking or falling off due to movement or shaking during the operation of the ethyl 3-ethoxypropionate preparation device 100. Furthermore, the rotary joint 60 ensures that when the feed pipe 70 is connected to the equipment, the ethyl 3-ethoxypropionate to be evaporated flows smoothly inside the feed pipe 70, preventing leakage or blockage due to improper connection. The feed pipe 70 is connected to the thin-film evaporator body 10 via the rotary joint 60, ensuring a secure, stable, and safe connection between the two, while also allowing for rotation between them, thus guaranteeing the normal operation of the device.

[0086] In some embodiments, please refer to Figure 4 The end of the second transmission channel 5001 near the support shaft 20 is higher than the end of the second transmission channel 5001 near the roller 40.

[0087] It is understandable that having one end of a transmission pipeline higher than the other creates a height difference, which in turn creates a pressure difference. This pressure difference allows the liquid, gas, or other transmission media in the pipeline to flow, thus enabling the transport of the media.

[0088] With this configuration, by setting the height difference of the second transmission channel 5001, the ethyl 3-ethoxypropionate to be evaporated in the second transmission channel 5001 can generate a certain amount of kinetic energy, flow to the injection port 5002 and be output to the top of the roller 40, thereby increasing the speed of the ethyl 3-ethoxypropionate to be evaporated in the second transmission channel 5001 to a certain extent.

[0089] In some embodiments, please refer to Figures 5 to 8 The bracket 50 includes a fixing part 51, a clamping part 52, and a locking mechanism 53. Wherein:

[0090] One end of the fixing part 51 is fixed to the support shaft 20.

[0091] One end of the clamping part 52 is hinged to one end of the fixing part 51.

[0092] The locking mechanism 53 has a locked state and an unlocked state: when it is locked, the locking mechanism 53 fixes the position of the clamping part 52 relative to the fixed part 51; when it is unlocked, the clamping part 52 can rotate relative to the fixed part 51.

[0093] The roller 40 is located between the fixing part 51 and the clamping part 52. The two ends of the roller 40 are rotatably and detachably connected to the other end of the fixing part 51 and the other end of the clamping part 52, respectively.

[0094] It is understood that the bracket 50 is a frame structure, and the roller 40 can be fixed within it or removed by locking and unlocking the locking mechanism 53. The locking mechanism 53 is a structure used to lock the clamping part 52 in a fixed position relative to the fixed part 51. The locking mechanism 53 can ensure that the clamping part 52 remains stationary in the required fixed position, avoiding accidental movement during operation, thereby protecting the safe use of the ethyl 3-ethoxypropionate preparation apparatus 100. For example, it can be a pin locking mechanism, gear locking mechanism, cam locking mechanism, bolt locking mechanism, and pneumatic locking mechanism, etc.

[0095] With this configuration, when the ethyl 3-ethoxypropionate to be evaporated is injected into the evaporation cavity 1001 and the drive mechanism 30 drives the support shaft 20 to rotate, the locking mechanism 53 can rotatably fix the roller 40 in the bracket 50, ensuring the safety, reliability, and stability of the device during use. Simultaneously, when the roller 40 needs cleaning or needs replacement due to wear, the locking mechanism 53 changes the positional relationship between the fixing part 51 and the clamping part 52, making disassembly or replacement of the roller 40 more convenient and quick.

[0096] Optionally, the roller 40 has a through hole at its center, and connecting shafts are provided on both the fixing part 51 and the clamping part 52 at positions corresponding to the through hole. When the locking mechanism 53 locks the clamping part 52 in a fixed position, the connecting shafts on the fixing part 51 and the clamping part 52 are respectively inserted into the two ends of the through hole of the roller 40, so that the roller 40 is rotatably fixed between the fixing part 51 and the clamping part 52. The projection of the injection port 5002 on the top of the roller 40 is located between the inner wall of the through hole of the roller 40 and the outer wall of the roller 40. The number of injection ports 5002 can be one or more.

[0097] With this configuration, when the ethyl 3-ethoxypropionate to be evaporated is output from the injection port 5002 to the top of the roller 40, it falls between the inner wall of the shaft through hole of the roller 40 and the outer wall of the roller 40, and is then guided to the rolling groove 4001 through the guide groove 4002. This reduces the possibility of the ethyl 3-ethoxypropionate to be evaporated flowing down from the through hole in the center of the roller 40, and makes it possible for the ethyl 3-ethoxypropionate to be evaporated to flow down along the rolling groove 4001 and be rolled into a thin film by the roller 40 and the inner wall of the evaporation cavity 1001.

[0098] Of course, in other embodiments, connecting shafts may be fixedly provided at both ends of the roller 40, a first blind hole is provided on the inner wall of the second transmission channel 5001 at the position corresponding to the injection port 5002, and a second blind hole is provided on the clamping part 52 at the position corresponding to the connecting shaft; when the locking mechanism 53 locks the clamping part 52 in a fixed position, the connecting shaft at one end of the roller 40 passes through the injection port 5002 and is rotatably inserted into the first blind hole, and the connecting shaft at the other end of the roller 40 is rotatably inserted into the second blind hole.

[0099] With this configuration, the ethyl 3-ethoxypropionate to be evaporated is output from the injection port 5002, falls along the connecting shaft onto the top of the roller 40. The connecting shaft not only connects the roller 40 to the fixing part 51, but also guides the flow of the ethyl 3-ethoxypropionate to be evaporated. It can also rotate within the injection port 5002 to prevent blockage of the injection port 5002, which would affect the flow of the ethyl 3-ethoxypropionate. Simultaneously, the connecting shaft and the roller 40 are integrated, preventing leakage from surfaces other than the outer wall of the roller 40 when the ethyl 3-ethoxypropionate to be evaporated falls onto the top of the roller 40.

[0100] In some embodiments, please refer to Figures 5 to 11 The fixing part 51 has at least one locking groove 5101, which includes an inlet groove 51011 and a locking groove 51012 communicating with the inlet groove 51011; the clamping part 52 has at least one sliding hole 5201, the position of which corresponds one-to-one with the position of the locking groove 5101. The locking mechanism 53 includes a connecting seat 531 and a connecting rod 532, wherein:

[0101] The connecting seat 531 is rotatably disposed at the bottom of the clamping part 52.

[0102] One end of the connecting rod 532 passes through the sliding hole 5201 and is fixed on the connecting seat 531. The other end of the connecting rod 532 has a locking pin 5321. The connecting rod 532 corresponds one-to-one with the locking pin groove 5101. The locking pin 5321 is used to enter the locking groove 51012 from the inlet groove 51011 to abut against the bottom wall of the locking groove 51012.

[0103] It can be understood that the inlet groove 51011 is a vertical or angled opening, providing a convenient entry point when inserting the connector. The locking groove 51012 can be at a certain angle to the inlet groove 51011 to lock the position of the locking pin 5321. When the locking pin 5321 is inserted into the inlet groove 51011, it can slide into the locking groove 51012 and be locked in the locking groove 51012. The cooperation between the locking groove 5101 and the locking pin 5321 ensures that the connecting rod 532 keeps the fixing part 51 and the clamping part 52 relatively fixed. For example, the inlet groove 51011 may penetrate the side wall of the fixing part 51 toward the roller 40 so that the locking pin 5321 can enter; a part of the locking groove 51012 penetrates the side wall of the fixing part 51 toward the roller 40 so that the connecting rod 532 can move, and another part of the locking groove 51012 does not penetrate the side wall of the fixing part 51 toward the roller 40 so as to abut against the locking pin 5321 that enters the locking groove 51012.

[0104] With this configuration, when the roller 40 is inserted between the fixing part 51 and the clamping part 52, and the fixing part 51 and the clamping part 52 are to be locked, the connecting rod 532 is pressed upward by the connecting seat 531, causing the locking pin 5321 at the other end of the connecting rod 532 to enter the corresponding inlet groove 51011 and abut against the top wall of the inlet groove 51011. Then, the connecting seat 531 is rotated so that the locking pin 5321 rotates into the depth of the locking groove 51012. After the force applied to the connecting seat 531 is removed, the locking pin 5321 moves towards the bottom wall of the locking groove 51012 and abuts against the bottom wall of the locking groove 51012. When the roller 40 is to be removed for replacement or the locking mechanism 53 is to be unlocked, the connecting seat 531 is rotated so that the locking pin 5321 moves from the locking groove 51012 to the inlet groove 51011. After falling out of the inlet groove 51011, the locking state is released. In related technologies, the ethyl 3-ethoxypropionate preparation apparatus 100 requires complete replacement of the entire unit if the scraper or other components used to scrape the ethyl 3-ethoxypropionate to be evaporated into a thin film on the inner wall of the housing become worn. This replacement process is complex and costly. However, in this embodiment, the locking mechanism 53 makes the installation and disassembly of the roller 40 more convenient and quick. When the roller 40 becomes worn, it can be disassembled and replaced individually, reducing maintenance costs and saving maintenance time. This allows the ethyl 3-ethoxypropionate preparation apparatus 100 to be put back into use as soon as possible and helps extend its service life.

[0105] Optionally, in some embodiments, when the roller 40 is rotatably disposed between the fixed part 51 and the clamping part 52, there is a space for movement between the top of the roller 40 and the fixed part 51, so that the roller 40 can move in the bracket 50 along the height direction of the bracket 50, which is more conducive to the locking mechanism 53 completing the unlocking and locking process.

[0106] Of course, in other embodiments, there may be a space between the connecting seat 531 and the clamping part 52 for the connecting seat 531 to move along the height direction of the bracket 50, so that the connecting seat 531 can not only rotate around the connection with the clamping part 52, but also move along the connection along the height direction of the bracket 50, which is more conducive to the locking mechanism 53 to complete the unlocking and locking process.

[0107] Optionally, in some embodiments, please refer to Figure 5 and Figure 9 The locking groove 5101 is opened at one end of the fixing part 51 near the roller 40. There can be multiple locking grooves 5101. Each locking groove 5101 is evenly opened along the circumferential direction of the roller 40. The inner diameter of the arc formed by each locking groove 5101 is larger than the diameter of the roller 40.

[0108] This configuration ensures that the connecting rod 532, which provides support and connection, is sufficiently far from the vertical rod at the other end of the bracket 50. This effectively improves the stability and rigidity of the bracket 50, enabling it to withstand greater loads or torques, maintain its frame shape, and increase its load-bearing capacity and service life. Furthermore, the inner diameter of the arc formed by the locking pins 5101 is larger than the diameter of the roller 40. In other words, the inner diameter of the arc formed by the orthographic projection of each connecting rod 532 onto the fixing part 51 is also larger than the diameter of the roller 40, ensuring that the connecting rod 532 does not interfere with the rotation of the roller 40.

[0109] Optionally, please refer to Figure 1 , Figures 5 to 8 In some embodiments, there are multiple brackets 50, which are arranged sequentially at intervals along the axial direction of the support shaft 20, and each bracket 50 is provided with a roller 40. The cross-section of the connecting rod 532 (the cross-section perpendicular to the height direction of the connecting rod 532) is an arc-shaped structure, and the concave side of the connecting rod 532 faces the roller 40. Multiple connecting rods 532 are arranged in an arc around the side of the roller 40 near the support shaft 20.

[0110] With this configuration, since there are multiple supports 50 and corresponding multiple rollers 40, compared to having a single, long support 50 and a single roller 40 along the height of the evaporation cavity 1001, the rollers 40 on each support 50 simultaneously press the ethyl 3-ethoxypropionate to be evaporated onto the inner wall of the evaporation cavity 1001 for evaporation, resulting in higher evaporation efficiency. Furthermore, in adjacent supports 50, the roller 40 on the upper support 50, pressing the ethyl 3-ethoxypropionate against the inner wall of the evaporation cavity 1001, can automatically move along the inner wall of the evaporation cavity 1001 towards the lower support 50, eliminating the need for a long support 50 and roller 40 along the height of the evaporation cavity 1001. Multiple supports 50 and rollers 40 save materials and reduce costs. Additionally, when a roller 40 wears out and needs replacement, replacing only the worn portion of the roller 40 is more convenient and less costly than replacing the entire roller 40 where only a part is worn. When the ethyl 3-ethoxypropionate preparation apparatus 100 is operating, the roller 40 rotates both around the support shaft 20 and its own axis to achieve a rolling effect on the inner wall of the evaporation cavity 1001. A portion of the ethyl 3-ethoxypropionate to be evaporated on the roller 40 may be flung out towards the support shaft 20. The flung-out ethyl 3-ethoxypropionate is blocked by the connecting rod 532 surrounding the roller 40 near the support shaft 20 and confined within the space between the connecting rod 532 and the outer wall of the roller 40. The ethyl 3-ethoxypropionate then flows down along the connecting rod 532 and falls onto the lower support 50 and the cooperating roller 40, where it can continue to be pressed into a thin film by the lower roller 40 and the inner wall of the evaporation cavity 1001, completing the evaporation. This effectively reduces incomplete evaporation and improves evaporation efficiency.

[0111] Please see Figures 1 to 11 This application also provides a method for preparing ethyl 3-ethoxypropionate, using the ethyl 3-ethoxypropionate preparation apparatus 100 of any of the above embodiments. The method for preparing ethyl 3-ethoxypropionate includes the following steps:

[0112] Ethyl 3-ethoxypropionate to be evaporated is introduced into evaporation cavity 1001;

[0113] The drive mechanism 30 drives the support shaft 20 to rotate around the axis of the support shaft 20. While the support shaft 20 drives the roller 40 to rotate around the axis of the support shaft 20, the roller 40 rolls with the inner wall of the evaporation cavity 1001.

[0114] After the ethyl 3-ethoxypropionate to be evaporated enters the evaporation cavity 1001, it flows down along the outer wall of the roller 40, is pressed by the roller 40 onto the inner wall of the evaporation cavity 1001 to form a thin film, and is evaporated into ethyl 3-ethoxypropionate gas and transported out of the evaporation cavity 1001.

[0115] As can be seen from the above, in the method for preparing ethyl 3-ethoxypropionate provided in this application, the ethyl 3-ethoxypropionate to be evaporated enters the interior of the evaporation cavity 1001 through the feed pipe 70, is pressed against the inner wall of the evaporation cavity 1001 by the roller 40 to form a thin film, and is evaporated into ethyl 3-ethoxypropionate gas and transported out of the evaporation cavity 1001. This method makes the roller 40, which presses the ethyl 3-ethoxypropionate to be evaporated into a thin film, less prone to wear, and the film formed during evaporation has a uniform thickness, thus improving the evaporation efficiency.

[0116] In some embodiments, the ethyl 3-ethoxypropionate to be evaporated enters the ethyl 3-ethoxypropionate preparation apparatus 100 through the feed pipe 70, and then enters the first transfer channel 2001 inside the support shaft 20 through the rotary joint 60. The rotary joint 60 allows the ethyl 3-ethoxypropionate to be evaporated to enter the first transfer channel 2001 inside the support shaft 20 unaffected when the ethyl 3-ethoxypropionate preparation apparatus 100 is running and the support shaft 20 is rotating.

[0117] The ethyl 3-ethoxypropionate to be evaporated enters from the first transfer channel 2001 into the second transfer channel 5001 inside the connected support 50, and is output from the injection port 5002 to the top of the roller 40. Compared with the prior art, this avoids the problem of the ethyl 3-ethoxypropionate to be evaporated being directly injected into the evaporation cavity 1001, and a portion of the ethyl 3-ethoxypropionate to be evaporated falling directly to the bottom of the evaporation cavity 1001, thus failing to complete evaporation on the inner wall of the evaporation cavity 1001.

[0118] The ethyl 3-ethoxypropionate to be evaporated flows down the rolling groove 4001 on the roller 40 and is rolled into a thin film by the rolling groove 4001 and the rolling protrusion 11, which increases the contact area between the roller 40 and the inner wall of the evaporation cavity 1001, effectively improving the evaporation efficiency and quality.

[0119] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An apparatus for preparing ethyl 3-ethoxypropionate, characterized in that, include: The main body of the thin-film evaporator has an evaporation cavity; A support shaft is rotatably disposed within the evaporation cavity; A drive mechanism, the power output end of which is connected to the support shaft, for driving the support shaft to rotate around the axis of the support shaft; as well as A roller is rotatably mounted on the support shaft about its axis, and the roller rolls into contact with the inner wall of the evaporation cavity to extrude ethyl 3-ethoxypropionate to be evaporated into a thin film on the inner wall of the evaporation cavity. The outer wall of the roller is provided with a plurality of rolling grooves, which extend along the axial direction of the roller and are evenly spaced along the circumferential direction of the roller. The inner wall of the evaporation cavity is provided with a plurality of rolling protrusions, which extend along the height direction of the thin film evaporator body and are evenly spaced along the circumference of the evaporation cavity; the rolling protrusions are used to fit and cooperate with the rolling groove. The top of the roller has multiple guide grooves, which point from the center of the top of the roller to the compaction groove.

2. The apparatus for preparing ethyl 3-ethoxypropionate as described in claim 1, characterized in that: The compaction groove is an arc-shaped groove, and the roller forms an arc-shaped protrusion between two adjacent compaction grooves; the compaction protrusion is an arc-shaped protrusion, and the compaction groove and the compaction protrusion fit together completely when they are engaged.

3. The apparatus for preparing ethyl 3-ethoxypropionate according to any one of claims 1 to 2, characterized in that: The apparatus for preparing ethyl 3-ethoxypropionate also includes a support, one end of which is fixed to the support shaft, and the roller is rotatably disposed at the other end of the support about the axis of the roller. The support shaft has a first transmission channel inside; The support has a second transmission channel inside, which is connected to one end of the first transmission channel. The other end of the second transmission channel penetrates the inner wall of the support to form a liquid injection port, which is located above the top of the roller and is used to deliver ethyl 3-ethoxypropionate to be evaporated to the top of the roller.

4. The apparatus for preparing ethyl 3-ethoxypropionate as described in claim 3, characterized in that, The apparatus for preparing ethyl 3-ethoxypropionate further includes: A rotary joint is disposed at the top end of the support shaft; and A feed pipe is connected to the rotary joint and communicates with the first transmission channel through the rotary joint, for injecting ethyl 3-ethoxypropionate to be evaporated into the evaporation cavity.

5. The apparatus for preparing ethyl 3-ethoxypropionate as described in claim 3, characterized in that: The end of the second transmission channel near the support shaft is higher than the end of the second transmission channel near the roller.

6. The apparatus for preparing ethyl 3-ethoxypropionate as described in claim 3, characterized in that, The support includes: The fixing part has one end fixed to the support shaft; A clamping part, one end of which is hinged to one end of the fixing part; A locking mechanism having a locked state and an unlocked state: when in the locked state, the locking mechanism fixes the position of the clamping part relative to the fixed part; when in the unlocked state, the clamping part can rotate relative to the fixed part. The roller is located between the fixing part and the clamping part, and the two ends of the roller are rotatably and detachably connected to the other end of the fixing part and the other end of the clamping part, respectively.

7. The apparatus for preparing ethyl 3-ethoxypropionate as described in claim 6, characterized in that, The fixing part has at least one locking groove, the locking groove including an inlet groove and a locking groove communicating with the inlet groove; the clamping part has at least one sliding hole, the position of the sliding hole corresponding one-to-one with the position of the locking groove; the locking mechanism includes: A connecting seat, rotatably disposed at the bottom of the clamping portion; and A connecting rod, one end of which passes through the sliding hole and is fixed to the connecting seat, and the other end of which has a locking pin. The connecting rod and the locking pin groove correspond one-to-one. The locking pin is used to enter the locking groove from the inlet groove and abut against the bottom wall of the locking groove.

8. A method for preparing ethyl 3-ethoxypropionate, characterized in that, The method for preparing ethyl 3-ethoxypropionate using the apparatus described in any one of claims 1 to 7 includes: Ethyl 3-ethoxypropionate to be evaporated is introduced into the evaporation cavity; The drive mechanism drives the support shaft to rotate around the axis of the support shaft. While the support shaft drives the roller to rotate around the axis of the support shaft, the roller rolls in contact with the inner wall of the evaporation cavity. After the ethyl 3-ethoxypropionate to be evaporated enters the evaporation cavity, it flows down the outer wall of the roller, is pressed by the roller onto the inner wall of the evaporation cavity to form a thin film, and is evaporated into ethyl 3-ethoxypropionate gas and transported out of the evaporation cavity.

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