A high-efficiency esterification device for UV cationic photocuring flexible epoxy monomer

Abstract

The application relates to the technical field of chemical equipment, in particular to a high-efficiency esterification device for a UV cation photopolymerization type flexible epoxy monomer, which comprises a reaction cavity, a stirring assembly, an illumination module, a temperature control unit and a by-product separation mechanism. A heat-conducting interlayer and a circulating pipeline are arranged in the reaction cavity, so that the heat transfer efficiency is improved; the stirring assembly is optimally designed to enhance the mixing effect; the illumination module adopts an ultraviolet LED array and a reflection cover to realize precise light control; and the by-product separation mechanism improves the separation efficiency through a filter screen and a vacuum pump. The application can solve the problems of the traditional esterification device, such as inaccurate reaction condition control, low heat transfer efficiency and difficult by-product separation, meets the high-efficiency esterification demand, and improves the reaction efficiency and product quality stability.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, specifically a high-efficiency esterification device for UV cationic curable flexible epoxy monomers. Background Technology

[0002] With the development of the chemical industry, esterification equipment is increasingly used in various chemical reactions. However, existing esterification equipment still has some problems in practical use, especially in the efficient esterification process of UV cationic curable flexible epoxy monomers, where traditional equipment often fails to meet the requirements of high efficiency, uniformity, and precise control.

[0003] A search revealed a "Powder-feeding device for esterification reactor" with publication number CN104324666B, published on May 11, 2016. This design aims to ensure thorough mixing of ester powder and water, thereby improving reaction efficiency, by connecting the water inlet to the cavity. However, this device primarily optimizes the mixing process of ester powder and water, failing to adequately consider the precise control requirements for reaction conditions (such as temperature, pressure, and catalyst distribution) in the esterification process of UV cationic curable flexible epoxy monomers. Furthermore, its stirring and mixing methods are relatively simple and may not meet the requirements for uniformity and reaction rate in high-viscosity or high-molecular-weight reaction systems. Therefore, the application effectiveness of this device may be limited when facing complex chemical reaction conditions.

[0004] A search revealed a "Powder-Feeding Device for Esterification Reactor" with publication number CN104307452B, published on May 11, 2016. This design utilizes a spherical structure to achieve sealed release of the ester powder, ensuring sufficient contact between the powder and the reaction medium, thereby improving reaction efficiency. However, the design focuses primarily on the release and mixing of the ester powder, lacking comprehensive consideration of heat transfer, byproduct separation, and reaction kinetic optimization during the esterification process. Especially in the efficient esterification process of UV cationic photocurable flexible epoxy monomers, rapid and uniform light irradiation is required to initiate the reaction; however, this device does not address the introduction and optimization of light conditions, potentially leading to low reaction efficiency or unstable product quality.

[0005] The aforementioned problems indicate that traditional esterification devices currently on the market are ill-suited to effectively address the new demands for precise control, rapid response, and efficient energy utilization in the high-efficiency esterification process of UV cationic curable flexible epoxy monomers. Therefore, this invention provides an intelligent and efficient UV cationic curable flexible epoxy monomer esterification device to overcome these shortcomings and offer a more intelligent, efficient, and adaptable solution to varying reaction conditions. Utility Model Content

[0006] This utility model relates to the field of chemical equipment technology, specifically a high-efficiency esterification device for UV cationic photocurable flexible epoxy monomers. Currently, existing esterification devices suffer from problems such as inaccurate control of reaction conditions, low heat transfer efficiency, difficulty in separating by-products, and insufficient light exposure during the high-efficiency esterification of UV cationic photocurable flexible epoxy monomers, leading to low reaction efficiency or unstable product quality. Therefore, this utility model provides the following technical solution: A high-efficiency esterification device for UV cationic curable flexible epoxy monomers includes a reaction chamber, a stirring assembly, a light irradiation module, a temperature control unit, and a byproduct separation mechanism. The inner wall of the reaction chamber is provided with a thermally conductive jacket, which is filled with a liquid medium with a high thermal conductivity. One end of a circulation pipe is connected to the outer wall of the thermally conductive jacket, and the other end of the circulation pipe is connected to an external heater. A drive pump is installed on the circulation pipe to propel the liquid medium to circulate between the thermally conductive jacket and the external heater.

[0007] The stirring assembly includes a rotating shaft, stirring blades, and a wall scraper. The rotating shaft is mounted at the top center of the reaction chamber via bearings, and its lower end extends to the bottom of the reaction chamber. The stirring blades are evenly distributed on the outer wall of the rotating shaft, and the wall scraper is fixed to the outer edge of the stirring blades, with its outer surface tightly fitted against the inner wall of the reaction chamber. The top of the rotating shaft is connected to the output shaft of a drive motor via a coupling, and the drive motor is fixed to a top support of the reaction chamber. Multiple through holes are formed on the surface of the stirring blades, and the edges of the through holes have micro-protrusions to enhance the turbulence of the liquid.

[0008] The illumination module includes a light source assembly and a reflector. The light source assembly is mounted on top of the reaction chamber, with its emitting surface facing the interior of the chamber. The reflector is fixed to the outer periphery of the light source assembly, and its inner wall is coated with a high-reflectivity coating to concentrate and reflect the light emitted by the light source into the interior area of ​​the reaction chamber. The light source assembly uses an ultraviolet LED array, and each LED in the array is independently controlled. The light intensity distribution in different areas is achieved through adjustment circuitry.

[0009] The temperature control unit includes a temperature sensor and a controller. The temperature sensor is installed on the inner wall of the reaction chamber to monitor temperature changes inside the chamber in real time. The controller is electrically connected to the temperature sensor and adjusts the operating power of the external heater based on the data collected by the temperature sensor. The temperature control unit also includes a cooling channel that surrounds the outside of the heat-conducting jacket. The inlet of the cooling channel is connected to a cooling water source, and the outlet is connected to an external drain pipe. The outer wall of the cooling channel is wrapped with heat-insulating material to reduce heat loss.

[0010] The byproduct separation mechanism includes a separation chamber, a filter screen, and a vacuum pump. The separation chamber is connected to the bottom of the reaction chamber via a connecting pipe, and a one-way valve is installed on the connecting pipe. The one-way valve is configured to allow flow from the reaction chamber to the separation chamber. The filter screen is fixed inside the separation chamber, and its pore size is selected according to the size of the byproduct particles. The vacuum pump is connected to the top of the separation chamber via a suction pipe to create a negative pressure environment within the separation chamber, accelerating the byproduct separation process.

[0011] The reaction chamber has a feed inlet at the top, with a sealing ring made of corrosion-resistant rubber installed on its inner wall. The outer wall of the feed inlet is connected to a cover plate via threads, and the top of the cover plate has a handle for easy opening and closing of the feed inlet. The reaction chamber has a discharge outlet at the bottom, with a flow control valve installed on its inner wall. The opening of the flow control valve can be adjusted manually using a knob.

[0012] The inner wall of the heat-conducting jacket is equipped with multiple baffles arranged in a spiral pattern to guide the flow path of the liquid medium within the jacket and improve the uniformity of heat transfer. The surfaces of the baffles are polished to reduce resistance to the flow of the liquid medium.

[0013] A light-transmitting plate is installed below the light source assembly. The plate is fixed to the inner wall of the reaction chamber and is made of quartz glass. Its surface is coated with an anti-UV coating to protect the light source assembly from corrosion by the reaction medium. The edges of the light-transmitting plate are bonded to the inner wall of the reaction chamber with sealant to ensure the chamber's airtightness.

[0014] The through-holes of the stirring blades are embedded with magnetic material, which is coated with a corrosion-resistant coating. During stirring, the magnetic material interacts with the magnetic particles in the reaction medium, promoting particle dispersion and mixing. The outer surface of the scraper is coated with a wear-resistant coating with a thickness of 0.5 mm to extend the service life of the scraper.

[0015] A slag discharge port is located at the bottom of the separation chamber. A quick connector is installed on the inner wall of the slag discharge port, which connects to an external collection container to discharge the separated byproducts. An observation window made of transparent, high-temperature resistant glass is located on the outer wall of the separation chamber to monitor the separation of byproducts in real time.

[0016] This invention solves the problem of low heat transfer efficiency in traditional devices by incorporating a heat-conducting jacket and circulation pipes within the reaction chamber; enhances the mixing effect of the reaction medium through optimized structural design of the stirring assembly; achieves precise control of illumination conditions by introducing an ultraviolet LED array and reflector; and improves the separation efficiency of byproducts by adding a byproduct separation mechanism. The combination of these technical means enables this invention to achieve efficient, uniform, and precise control under complex chemical reaction conditions, meeting the requirements for efficient esterification of UV cationic photocurable flexible epoxy monomers. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle.

[0019] Figure 3 for Figure 1 A magnified diagram of region A.

[0020] Figure 4 for Figure 1 A magnified diagram of region B.

[0021] The attached diagram is labeled as follows: 1. Reaction chamber; 2. Thermally conductive jacket; 3. Circulation pipe; 4. Stirring assembly; 5. Light source assembly; 6. Reflector; 7. Separation chamber; 8. Filter screen; 9. Vacuum pump; 10. Baffle plate; 11. Light-transmitting plate; 12. Slag discharge port. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Specific implementation examples are given below.

[0024] This invention provides a high-efficiency esterification device for UV cationic curable flexible epoxy monomers, the specific implementation of which is described in conjunction with the appendix. Figure 1 To be continued Figure 3 A detailed description will be provided below. The device mainly includes a reaction chamber 1, a heat-conducting jacket 2, a circulation pipe 3, a stirring assembly 4, a light source assembly 5, a reflector 6, a separation chamber 7, a filter screen 8, a vacuum pump 9, a baffle plate 10, a light-transmitting plate 11, and a slag discharge port 12. The structural features of each component and their interconnections will be described in detail below.

[0025] The reaction chamber 1 is the core of the entire device, and a heat-conducting jacket 2 is installed inside it. A closed space is formed between the inner wall of the heat-conducting jacket 2 and the outer wall of the reaction chamber 1, and this space is filled with a liquid medium with a high thermal conductivity. One end of a circulation pipe 3 is connected to the bottom outlet of the heat-conducting jacket 2, and the other end is connected to an external heater. A drive pump is installed on the circulation pipe 3 to propel the liquid medium to circulate between the heat-conducting jacket 2 and the external heater. The inner wall of the heat-conducting jacket 2 is provided with multiple spirally distributed baffles 10. The surfaces of the baffles 10 are polished to reduce resistance to the flow of the liquid medium and to improve the uniformity of heat transfer by guiding the liquid medium along a specific path. A cooling channel surrounds the outer side of the heat-conducting jacket 2. The inlet of the cooling channel is connected to a cooling water source, and the outlet is connected to an external drain pipe. The outer wall of the cooling channel is wrapped with heat-insulating material to reduce heat loss.

[0026] The stirring assembly 4 includes a rotating shaft, stirring blades, and a wall scraper. The rotating shaft is mounted at the top center of the reaction chamber 1 via bearings, and its lower end extends to the bottom of the reaction chamber 1. The stirring blades are evenly distributed on the outer wall of the rotating shaft, and the surface of the stirring blades has multiple through holes with micro-protrusions at the edges of the through holes to enhance the turbulence of the liquid. The wall scraper is fixed to the outer edge of the stirring blades, and its outer surface is in close contact with the inner wall of the reaction chamber 1. The outer surface of the wall scraper is coated with a 0.5mm thick wear-resistant coating, which effectively extends its service life. The top of the rotating shaft is connected to the output shaft of the drive motor via a coupling. The drive motor is fixed to the top support of the reaction chamber 1, thereby driving the stirring assembly 4.

[0027] The light source assembly 5 is installed on top of the reaction chamber 1, with its emitting surface facing the interior of the reaction chamber 1. The light source assembly 5 uses an ultraviolet LED array, with each LED independently controlled. The light intensity distribution in different areas is achieved through adjustment circuitry. A reflector 6 is fixed to the outer periphery of the light source assembly 5. The inner wall of the reflector 6 is coated with a high-reflectivity coating to concentrate and reflect the light emitted by the light source to the interior area of ​​the reaction chamber 1. A light-transmitting plate 11 is located below the light source assembly 5. The light-transmitting plate 11 is fixed to the inner wall of the reaction chamber 1. It is made of quartz glass and coated with an anti-ultraviolet coating. The edges of the light-transmitting plate 11 are bonded to the inner wall of the reaction chamber 1 with sealant to ensure sealing performance.

[0028] The temperature control unit includes a temperature sensor and a controller. The temperature sensor is installed on the inner wall of the reaction chamber 1 to monitor the temperature changes inside the reaction chamber 1 in real time. The controller is electrically connected to the temperature sensor and adjusts the operating power of the external heater based on the data collected by the temperature sensor. In addition, the temperature control unit also includes a cooling channel, which surrounds the outside of the thermally conductive jacket 2. The inlet of the cooling channel is connected to a cooling water source, and the outlet is connected to an external drain pipe. The outer wall of the cooling channel is wrapped with heat-insulating material.

[0029] The by-product separation mechanism includes a separation chamber 7, a filter screen 8, and a vacuum pump 9. The separation chamber 7 is connected to the bottom of the reaction chamber 1 via a connecting pipe, and a one-way valve is installed on the connecting pipe, with the flow direction set from the reaction chamber 1 to the separation chamber 7. The filter screen 8 is fixed inside the separation chamber 7, and its pore size is selected according to the size of the by-product particles. The vacuum pump 9 is connected to the top of the separation chamber 7 via a suction pipe to create a negative pressure environment within the separation chamber 7, accelerating the by-product separation process. A slag discharge port 12 is provided at the bottom of the separation chamber 7, and a quick connector is installed on the inner wall of the slag discharge port 12. The quick connector connects to an external collection container for discharging the separated by-products. An observation window made of transparent, high-temperature resistant glass is provided on the outer wall of the separation chamber 7 for real-time monitoring of the by-product separation process.

[0030] The reaction chamber 1 has a feed inlet at the top, with a sealing ring made of corrosion-resistant rubber installed on its inner wall. The outer wall of the feed inlet is connected to a cover plate via threads, and the top of the cover plate has a handle for easy opening and closing of the feed inlet by the operator. The reaction chamber 1 has a discharge outlet at the bottom, with a flow control valve installed on its inner wall. The opening of the flow control valve can be adjusted manually using a knob.

[0031] In actual operation, the reaction raw materials are first added into the reaction chamber 1 through the feed inlet. Then, the drive motor is started to drive the stirring assembly 4 to rotate. The through holes and micro-protrusions on the stirring blades enhance the turbulence effect of the reaction medium. At the same time, the tight fit between the scraper and the inner wall of the reaction chamber 1 effectively prevents materials from adhering to the inner wall of the chamber. After the drive pump starts, the liquid medium circulates between the heat-conducting jacket 2 and the external heater. The baffle 10 guides the liquid medium to flow along a spiral path, thereby improving the uniformity of heat transfer. The temperature sensor monitors the temperature change inside the reaction chamber 1 in real time, and the controller adjusts the working power of the external heater to maintain the temperature conditions required for the reaction. When cooling is required, cooling water in the cooling channel flows in through the inlet and flows out through the outlet, thereby cooling the reaction chamber 1.

[0032] The ultraviolet LED array in the light source assembly 5 irradiates the interior of the reaction chamber 1 according to the set light intensity distribution. The reflector 6 concentrates and reflects the light into the interior area of ​​the reaction chamber 1, thereby ensuring the uniformity of the illumination conditions. The light-transmitting plate 11 not only protects the light source assembly 5 from the corrosion of the reaction medium, but also ensures the effective transmission of light. As the reaction proceeds, the by-products enter the separation chamber 7 through the one-way valve. Under the action of the vacuum pump 9, the by-products are intercepted by the filter screen 8, and the separated by-products are discharged from the device through the slag discharge port 12.

[0033] The specific embodiments of this utility model have been described above. Through the above structural design and operating principle, this device can achieve efficient, uniform, and precise control under complex chemical reaction conditions, meeting the requirements for efficient esterification of UV cationic curable flexible epoxy monomers. To better enable those skilled in the art to fully understand and implement this utility model, the operating principle and implementation steps of this device are explained in detail below with reference to a specific application scenario.

[0034] In practical applications, this device is mainly used for the efficient esterification reaction of UV cationic curable flexible epoxy monomers. During operation, the reactants are first added to the reaction chamber 1 through the feed inlet, and then the drive motor is started to rotate the stirring assembly 4. The through holes on the stirring blades and the tiny protrusions on their edges create localized turbulence during liquid flow, thereby enhancing the mixing effect of the reaction medium. Simultaneously, the tight fit between the scraper and the inner wall of the reaction chamber 1 effectively prevents high-viscosity materials from adhering to the inner wall of the chamber, ensuring the uniformity of the reaction system. Furthermore, the wear-resistant coating on the surface of the scraper significantly reduces wear during long-term use, extending the service life of the components.

[0035] Meanwhile, the liquid medium within the heat-conducting jacket 2 flows along the circulation pipe 3 under the action of the drive pump, and returns to the heat-conducting jacket 2 after being heated by the external heater. The spiral distribution of the baffles 10 guides the liquid medium to flow along a specific path. This design not only reduces the resistance during the flow of the liquid medium, but also improves the uniformity of heat transfer. The temperature sensor monitors the temperature changes inside the reaction chamber 1 in real time and transmits the data to the controller. The controller adjusts the operating power of the external heater according to the preset temperature conditions, thereby precisely controlling the temperature environment required for the reaction. When rapid cooling is required, cooling water in the cooling channel flows in through the inlet and flows out through the outlet, quickly removing excess heat from the reaction chamber 1 and ensuring the stability of the reaction conditions.

[0036] The ultraviolet LED array in the light source assembly 5 irradiates the interior of the reaction chamber 1 according to the set light intensity distribution. The high-reflectivity coating of the reflector 6 concentrates and reflects the light into the interior area of ​​the reaction chamber 1, ensuring uniform illumination. The light-transmitting plate 11 is made of quartz glass, and its surface is coated with an anti-ultraviolet coating that effectively protects the light source assembly 5 from corrosion by the reaction medium while ensuring efficient light transmission. The introduction of ultraviolet light provides the necessary energy for the UV cationic photocuring reaction, promoting its efficient progress.

[0037] As the reaction proceeds, byproducts enter separation chamber 7 through a one-way valve. After vacuum pump 9 is activated, a negative pressure environment is created within separation chamber 7, accelerating the separation process of byproducts. The pore size of filter screen 8 is selected according to the size of the byproduct particles, effectively trapping them, while the separated byproducts are discharged from the device through slag discharge port 12. An observation window on the outer wall of separation chamber 7 allows operators to monitor the separation of byproducts in real time, ensuring the smooth operation of the separation process.

[0038] In the above steps, the coordinated operation of each component achieves precise control of reaction conditions, high efficiency of heat transfer, and convenient separation of by-products. For example, the combination of the thermally conductive jacket 2 and the circulation pipe 3 solves the problem of low heat transfer efficiency in traditional devices; the design of the stirring component 4 enhances the mixing effect of the reaction medium, especially exhibiting excellent performance in high viscosity or high molecular weight systems; the cooperation between the light source component 5 and the reflector 6 achieves uniform distribution of illumination conditions, meeting the requirements of UV cationic photocuring reaction; and the by-product separation mechanism significantly improves the separation efficiency of by-products through the design of the negative pressure environment and the filter screen 8.

[0039] In summary, this invention, through optimized structural design and operating principles of its components, enables the device to achieve efficient, uniform, and precise control under complex chemical reaction conditions, meeting the requirements for efficient esterification of UV cationic curable flexible epoxy monomers. The above embodiments are merely preferred examples and are not intended to limit the scope of protection of this invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency esterification device for UV cationic curable flexible epoxy monomers, characterized in that, The reaction chamber (1) includes a stirring assembly (4), a light module, a temperature control unit, and a byproduct separation mechanism. The inner wall of the reaction chamber (1) is provided with a thermally conductive jacket (2), which is filled with a liquid medium with a high thermal conductivity. One end of a circulation pipe (3) is connected to the outer wall of the thermally conductive jacket (2), and the other end of the circulation pipe (3) is connected to an external heater. A drive pump is installed on the circulation pipe (3). The stirring assembly (4) includes a rotating shaft, stirring blades, and a wall scraper. The rotating shaft is mounted at the top center of the reaction chamber (1) via a bearing, and its lower end extends to the bottom of the reaction chamber (1). The stirring blades... The blades are evenly distributed on the outer wall of the rotating shaft. The scraper is fixed on the outer edge of the stirring blade and fits tightly against the inner wall of the reaction chamber (1). The illumination module includes a light source assembly (5) and a reflector (6). The light source assembly (5) is installed on the top of the reaction chamber (1) and the light-emitting surface faces the inside of the reaction chamber (1). The reflector (6) is fixed on the outer periphery of the light source assembly (5). The temperature control unit includes a temperature sensor and a controller. The temperature sensor is installed on the inner wall of the reaction chamber (1). The by-product separation mechanism includes a separation chamber (7), a filter screen (8), and a vacuum pump (9). The separation chamber (7) is connected to the bottom of the reaction chamber (1) through a connecting pipe.

2. The high-efficiency esterification apparatus according to claim 1, characterized in that, The inner wall of the heat-conducting interlayer (2) is provided with a plurality of spirally distributed baffles (10), and the surface of the baffles (10) is polished.

3. The high-efficiency esterification apparatus according to claim 1, characterized in that, The surface of the stirring blade has multiple through holes, and the edges of the through holes are provided with tiny protrusions. The outer surface of the scraper is provided with a wear-resistant coating with a thickness of 0.5 mm.

4. The high-efficiency esterification apparatus according to claim 1, characterized in that, The light source assembly (5) uses an ultraviolet LED array, with each LED bead controlled independently, and the inner wall of the reflector (6) is coated with a high reflectivity coating.

5. The high-efficiency esterification apparatus according to claim 1, characterized in that, A light-transmitting plate (11) is provided below the light source assembly (5). The light-transmitting plate (11) is fixed to the inner wall of the reaction chamber (1). The material of the light-transmitting plate (11) is quartz glass, and the surface of the light-transmitting plate (11) is coated with an anti-ultraviolet coating.

6. The high-efficiency esterification apparatus according to claim 1, characterized in that, The temperature control unit also includes a cooling channel, which surrounds the outside of the heat-conducting jacket (2). The inlet of the cooling channel is connected to the cooling water source, and the outlet is connected to the external drain pipe. The outer wall of the cooling channel is wrapped with heat-insulating material.

7. The high-efficiency esterification apparatus according to claim 1, characterized in that, The separation chamber (7) is equipped with a filter screen (8), the pore size of which is selected according to the size of the by-product particles. The vacuum pump (9) is connected to the top of the separation chamber (7) through a suction pipe.

8. The high-efficiency esterification apparatus according to claim 1, characterized in that, The top of the reaction chamber (1) is provided with a feed inlet, and a sealing ring is installed on the inner wall of the feed inlet. The sealing ring is made of corrosion-resistant rubber, and the outer wall of the feed inlet is connected to the cover plate by threads.

9. The high-efficiency esterification apparatus according to claim 1, characterized in that, The bottom of the reaction chamber (1) is provided with a discharge port, and the inner wall of the discharge port is equipped with a flow control valve. The opening of the flow control valve is adjusted by a manual knob.

10. The high-efficiency esterification apparatus according to claim 1, characterized in that, The bottom of the separation chamber (7) is provided with a slag discharge port (12), and a quick connector is installed on the inner wall of the slag discharge port (12). The quick connector is connected to an external collection container. The outer wall of the separation chamber (7) is provided with an observation window, and the observation window is made of transparent high-temperature resistant glass.

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