Liquid phase reaction mixing device

Abstract

The utility model relates to a liquid phase reaction mixing device in the technical field of mixing equipment. The liquid phase reaction mixing device comprises a reaction kettle, a feeding hole is formed in the reaction kettle, a discharging pipe is arranged at the bottom of the reaction kettle, a heat exchange jacket is arranged outside the reaction kettle, and a stirring assembly is arranged in the reaction kettle; the stirring assembly comprises a rotating disc, a stirring rod and a scraping rod, the rotating disc is fixedly connected with a vertical rotating shaft, the vertical rotating shaft penetrates through the reaction kettle and then is connected with a stepping motor, the scraping rod is in contact with the bottom and the side wall of the reaction kettle and is fixedly connected with a vertical rod, and the upper end of the vertical rod is fixedly connected with the center of the lower surface of the rotating disc; the upper ends of the plurality of stirring rods are fixedly connected with the lower surface of the rotating disc, and the top ends of the plurality of stirring rods are positioned on the track of the same Archimedes spiral line. The stirring range and stirring sufficiency of the stirring rod are improved, the stirring and mixing efficiency and effect are improved, the adhesion of materials on the inner wall of the reaction kettle is reduced, the heat dissipation effect is good, and the reaction in the reaction kettle is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of mixing equipment technology, specifically relating to a liquid phase reaction mixing device. Background Technology

[0002] 4-Hydroxybutylvinyl ether (HBVE) is a bifunctional compound containing hydroxyl (-OH) and vinyl (-CH=CH2) groups. Its reaction and mixing process varies depending on the characteristics of these functional groups. For example, due to the high viscosity of HBVE (especially in the later stages of polymerization), uneven mixing can easily occur during stirring, leading to localized overheating or incomplete reaction. Furthermore, its polymerization reaction is highly exothermic, and traditional heat exchange jackets often have insufficient heat exchange area, easily causing localized overheating and explosive polymerization, which is detrimental to the reaction. Therefore, a liquid-phase reaction mixing device is urgently needed to solve these technical problems. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of the existing technology by providing a liquid phase reaction mixing device, including a reaction vessel, a feed inlet on the reaction vessel, a discharge pipe with a switch valve at the bottom of the reaction vessel, a heat exchange jacket outside the reaction vessel, and a stirring assembly inside the reaction vessel;

[0004] The stirring assembly includes a rotating disk, stirring rods, and scraper rods. The rotating disk is located at the top inside the reactor. A vertical rotating shaft is fixedly connected to the center of the upper surface of the rotating disk. The top end of the vertical rotating shaft passes through the reactor and is connected to a stepper motor. The scraper rod contacts the bottom and side wall of the reactor and is fixedly connected to a vertical rod. The upper end of the vertical rod is fixedly connected to the center of the lower surface of the rotating disk. The upper ends of multiple stirring rods are fixedly connected to the lower surface of the rotating disk, and the top ends of multiple stirring rods are located on the same Archimedean spiral trajectory.

[0005] It should be noted that the stirring rods are distributed along the Archimedes spiral trajectory, which can increase the stirring range as the stirring rods rotate with the rotating disk, making the mixing more thorough, and further improving the heat dissipation effect. The scraper rods can scrape the bottom and side walls of the reactor to prevent the material from sticking to the inner wall.

[0006] Preferably, the rotating disk has a liquid distribution chamber, which is further divided into an upper chamber and a lower chamber by a partition. The stirring rod is a U-shaped tube, with both ends connected to the upper and lower chambers respectively. Both ends of the U-shaped tube are located on the same Archimedean spiral trajectory. A bevel gear is fixed on the outer wall of the vertical rotating shaft, and a bevel gear meshes with a second bevel gear. The second bevel gear is connected to a stepper motor. A liquid guiding chamber is provided inside the vertical rotating shaft and is connected to the upper chamber. An inlet pipe is fixedly connected to the lower chamber. The inlet pipe passes through the liquid guiding chamber and is rotatably connected to the liquid guiding pipe via a bearing. A drain assembly is connected to the liquid guiding chamber.

[0007] It should be noted that by introducing cooling medium (such as cold water or cold oil) into the inlet pipe, the cooling medium enters the lower chamber and then enters each U-shaped tube. The cooling medium in the U-shaped tube exchanges heat with the material in the reactor and then enters the upper chamber and flows out through the liquid guiding chamber. The cooling medium continuously circulates in the U-shaped tube, carrying away the heat in the reactor. Combined with the cooling jacket, it enables efficient heat exchange between the inside and outside of the reactor, which is beneficial to the reaction inside the reactor.

[0008] Preferably, the drain assembly includes a connecting pipe, the top of which is sealed, the connecting pipe is fixedly connected to the reactor via a bracket, the lower end of which is rotatably connected to a vertical shaft via a bearing, the liquid guiding chamber is connected to the connecting pipe, a drain pipe is provided on the side wall of the connecting pipe, and the liquid inlet pipe passes through the top of the connecting pipe and is rotatably connected to the connecting pipe via a bearing.

[0009] It should be noted that the coolant in the liquid guiding chamber enters the connecting pipe, and a siphon or liquid pump can be installed in the connecting pipe to discharge the liquid in the connecting pipe from the drain pipe.

[0010] Preferably, the reactor is equipped with an inlet pipe and an outlet pipe. The inlet pipe is equipped with an inlet valve, and the outlet pipe is equipped with an outlet valve. Safety gas (such as nitrogen) can be injected into the reactor as needed to increase the pressure inside the reactor. The outlet valve can also be opened as needed to discharge the gas inside the reactor.

[0011] Preferably, the reactor is equipped with a temperature sensor and a pressure sensor. This allows for timely monitoring of the temperature and pressure within the reactor, facilitating control of the circulation rate of the cooling medium in the heat exchange jacket and U-tube, and enabling flexible control of the reactor pressure as needed via the inlet and outlet pipes.

[0012] This invention also includes other components that enable the normal operation of a liquid-phase reaction mixing device, such as control components for controlling the inlet pipe (e.g., an inlet pump), control components for controlling the outlet pipe (a suction pump), control components for a stepper motor, control components for switching valves, control components for temperature sensors, control components for pressure sensors, and control components for inlet and outlet valves, all of which are conventional technologies in the field. Furthermore, devices or components not limited in this invention, such as temperature sensors, switching valves, inlet pumps, suction pumps, outlet valves, and inlet valves, all employ conventional technologies and equipment in the field.

[0013] Working principle: Materials enter the reactor through the feed inlet. A stepper motor then drives the stirring assembly to rotate. During rotation, the stirring rods follow an Archimedean spiral trajectory, increasing the stirring range and ensuring more thorough mixing as the stirring rods rotate with the rotating disc. This also improves heat dissipation. The scraper rods scrape materials from the bottom and side walls of the reactor, preventing material adhesion to the inner walls. Throughout this process, a cooling medium (cold water or heat transfer oil) is circulated through the heat exchange jacket to remove the heat generated during the reaction within the reactor.

[0014] This invention has the following advantages: it improves the stirring range and the thoroughness of stirring, increases the efficiency and effect of stirring and mixing, reduces the adhesion of materials to the inner wall of the reactor, has good heat dissipation, and is beneficial to the reaction inside the reactor. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of a liquid-phase reaction mixing device in Embodiment 1 of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of a liquid-phase reaction mixing device in embodiments 2 and 3 of this utility model;

[0018] Figure 3 for Figure 2 A bottom view of the central rotating disk;

[0019] Figure 4 for Figure 3 A partial sectional view at point AA.

[0020] In the diagram: 1. Reactor; 2. Heat exchange jacket; 3. Vertical rod; 4. Scraper rod; 5. Rotating disc; 6. Air inlet pipe; 7. Exhaust pipe; 8. Feed inlet; 9. Baffle plate; 10. Liquid inlet pipe; 11. Vertical rotating shaft; 12. Bevel gear one; 13. Connecting pipe; 14. Bevel gear two; 15. Stepper motor; 16. Drain pipe; 17. Discharge pipe; 18. Support; 19. Stirring rod; 20. Medium inlet pipe; 21. Medium outlet pipe; 22. Liquid guide pipe. Detailed Implementation

[0021] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention.

[0022] Example 1

[0023] like Figure 1 As shown, this utility model provides a liquid phase reaction mixing device, including a reaction vessel 1, a feed inlet 8 on the reaction vessel 1, a discharge pipe 17 with a switch valve at the bottom of the reaction vessel 1, a heat exchange jacket 2 outside the reaction vessel 1, a medium inlet pipe 20 and a medium outlet pipe 21 on the heat exchange jacket 2, and the cooling medium flowing into the heat exchange jacket is cold water or cold oil, and a stirring assembly is provided inside the reaction vessel 1;

[0024] The stirring assembly includes a rotating disk 5, stirring rods 19, and scraper rods 4. The rotating disk 5 is located at the top inside the reactor 1. A vertical rotating shaft 11 is fixedly connected to the center of the upper surface of the rotating disk 5. The top end of the vertical rotating shaft 11 passes through the reactor 1 and is connected to a stepper motor 15. The scraper rod 4 contacts the bottom and side wall of the reactor 1 and is fixedly connected to a vertical rod 3. The upper end of the vertical rod 3 is fixedly connected to the center of the lower surface of the rotating disk 5. The upper ends of the multiple stirring rods 19 are fixedly connected to the lower surface of the rotating disk 5, and the top ends of the multiple stirring rods 19 are located on the same Archimedean spiral trajectory.

[0025] The reactor 1 is equipped with an inlet pipe 6 and an exhaust pipe 7. The inlet pipe 6 is equipped with an inlet valve, and the exhaust pipe 7 is equipped with an exhaust valve. Safety gas (such as nitrogen) can be injected into the reactor 1 as needed to increase the pressure inside the reactor 1. The exhaust valve can also be opened as needed to discharge the gas inside the reactor 1.

[0026] During operation, materials enter the reactor 1 through the feed inlet 8. The stepper motor 15 then drives the stirring assembly to rotate. During rotation, the stirring rods 19 follow an Archimedean spiral trajectory, increasing the stirring range as the stirring rods 19 rotate with the rotating disk 5, resulting in more thorough mixing and improved heat dissipation. The scraper rods 4 scrape materials from the bottom and side walls of the reactor 1, preventing material adhesion to the inner wall. Throughout this process, the heat exchange jacket 2 circulates a cooling medium (cold water or heat transfer oil) to dissipate the heat generated during the reaction within the reactor 1.

[0027] Example 2

[0028] like Figure 2-4 As shown, this utility model provides a liquid phase reaction mixing device, including a reaction vessel 1, a feed inlet 8 on the reaction vessel 1, a discharge pipe 17 with a switch valve at the bottom of the reaction vessel 1, a heat exchange jacket 2 outside the reaction vessel 1, a medium inlet pipe 20 and a medium outlet pipe 21 on the heat exchange jacket 2, and the cooling medium flowing into the heat exchange jacket is cold water or cold oil, and a stirring assembly is provided inside the reaction vessel 1;

[0029] The stirring assembly includes a rotating disk 5, stirring rods 19, and scraper rods 4. The rotating disk 5 is located at the top inside the reactor 1. A vertical rotating shaft 11 is fixedly connected to the center of the upper surface of the rotating disk 5. The top end of the vertical rotating shaft 11 passes through the reactor 1 and is connected to a stepper motor 15. The scraper rod 4 contacts the bottom and side wall of the reactor 1 and is fixedly connected to a vertical rod 3. The upper end of the vertical rod 3 is fixedly connected to the center of the lower surface of the rotating disk 5. The upper ends of the multiple stirring rods 19 are fixedly connected to the lower surface of the rotating disk 5, and the top ends of the multiple stirring rods 19 are located on the same Archimedean spiral trajectory.

[0030] The rotating disk 5 has a liquid distribution chamber, and the liquid distribution chamber is equipped with a partition 9, which divides the liquid distribution chamber into an upper chamber and a lower chamber. The stirring rod 19 is a U-shaped tube, and the two ends of the U-shaped tube are respectively connected to the upper chamber and the lower chamber. Figure 3 As shown, both ends of the U-shaped tube are located on the same Archimedean spiral trajectory. A bevel gear 12 is fixed on the outer wall of the vertical rotating shaft 11. The bevel gear 12 meshes with a bevel gear 14. The bevel gear 14 is connected to a stepper motor 15. A liquid guiding cavity is provided inside the vertical rotating shaft 11. The liquid guiding cavity is connected to the upper cavity. An inlet pipe 10 is fixedly connected to the lower cavity. The inlet pipe 10 passes through the liquid guiding cavity and is rotatably connected to a liquid guiding pipe 22 through a bearing. A drain assembly is connected to the liquid guiding cavity.

[0031] The drainage assembly includes a connecting pipe 13, the top of which is sealed. The connecting pipe 13 is fixedly connected to the reactor 1 via a bracket 18. The lower end of the connecting pipe 13 is rotatably connected to a vertical rotating shaft 11 via a bearing. The liquid guiding chamber communicates with the connecting pipe 13. A drainage pipe 16 is provided on the side wall of the connecting pipe 13. The liquid inlet pipe 10 passes through the top of the connecting pipe 13 and is rotatably connected to the connecting pipe 13 via a bearing. Coolant in the liquid guiding chamber enters the connecting pipe 13. A siphon or liquid pump can be installed inside the connecting pipe 13 to discharge the liquid in the connecting pipe 13 through the drainage pipe 16.

[0032] The reactor 1 is equipped with an inlet pipe 6 and an exhaust pipe 7. The inlet pipe 6 is equipped with an inlet valve, and the exhaust pipe 7 is equipped with an exhaust valve. Safety gas (such as nitrogen) can be injected into the reactor 1 as needed to increase the pressure inside the reactor 1. The exhaust valve can also be opened as needed to discharge the gas inside the reactor 1.

[0033] Working Principle: Materials enter the reactor 1 through the feed inlet 8. A stepper motor 15 drives the stirring assembly to rotate. During rotation, the stirring rod 19 follows an Archimedean spiral trajectory, increasing the stirring range and ensuring more thorough mixing as it rotates with the rotating disk 5. This also improves heat dissipation. The scraper rod 4 scrapes materials from the bottom and side walls of the reactor 1, preventing material adhesion to the inner wall. During this process, a cooling medium (cold water or heat transfer oil) is circulated through the heat exchange jacket 2 to remove heat generated during the reaction in the reactor 1. Simultaneously, a cooling medium (cold water or cold oil, etc.) is introduced into the liquid inlet pipe 10. After entering the lower chamber, the cooling medium flows into each U-shaped tube. The cooling medium in the U-shaped tubes exchanges heat with the materials in the reactor 1 before entering the upper chamber and passing through the liquid guide chamber. It then flows out through the drain assembly. The cooling medium continuously circulates within the U-shaped tubes, carrying away heat from the reactor 1. This, combined with the efficient heat exchange between the inside and outside of the reactor 1 via the cooling jacket, is beneficial for the reaction within the reactor 1.

[0034] Example 3

[0035] like Figure 2-4 As shown, the difference between this embodiment and Embodiment 2 is that the reactor 1 is equipped with a temperature sensor and a pressure sensor. This allows for timely monitoring of the temperature and pressure within the reactor 1, facilitating control of the circulation rate of the cooling medium in the heat exchange jacket 2 and the U-tube. The pressure within the reactor 1 can also be flexibly controlled as needed via the inlet pipe 6 and the exhaust pipe 7. Specifically, the temperature sensor is electrically connected to the inlet pump connected to the inlet pipe, allowing for timely control of the inlet rate and adjusting the circulation effect of the cooling medium (cold water). The pressure sensor is electrically connected to the inlet valve and the exhaust valve, allowing for flexible control of their opening and closing based on the pressure within the reactor.

[0036] The stepper motor, liquid inlet pump, liquid suction pump, temperature sensor, pressure sensor, air inlet valve, and exhaust valve involved in the above embodiments 1, 2, and 3 are all existing technologies. This application does not make any improvements to them, but only utilizes their existing functions. For their specific structure and principle, please refer to the product manual or existing technical data, which are all existing technologies.

[0037] The embodiments of this utility model have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A liquid-phase reaction mixing device, comprising a reaction vessel, wherein the reaction vessel is provided with a feed inlet, and the bottom of the reaction vessel is provided with a discharge pipe equipped with a switch valve, and a heat exchange jacket is provided outside the reaction vessel, characterized in that: The reactor is equipped with a stirring assembly; The stirring assembly includes a rotating disk, stirring rods, and scraper rods. The rotating disk is located at the top inside the reactor. A vertical rotating shaft is fixedly connected to the center of the upper surface of the rotating disk. The top end of the vertical rotating shaft passes through the reactor and is connected to a stepper motor. The scraper rod contacts the bottom and side wall of the reactor and is fixedly connected to a vertical rod. The upper end of the vertical rod is fixedly connected to the center of the lower surface of the rotating disk. The upper ends of multiple stirring rods are fixedly connected to the lower surface of the rotating disk, and the top ends of multiple stirring rods are located on the same Archimedean spiral trajectory.

2. The liquid-phase reaction mixing device according to claim 1, characterized in that: The rotating disk has a liquid distribution chamber, which is divided into an upper chamber and a lower chamber by a partition. The stirring rod is a U-shaped tube, with its two ends connected to the upper and lower chambers, respectively. A bevel gear is fixed on the outer wall of the vertical rotating shaft, and a bevel gear meshes with a second bevel gear. The second bevel gear is connected to a stepper motor. A liquid guiding chamber is provided inside the vertical rotating shaft and is connected to the upper chamber. An inlet pipe is fixedly connected to the lower chamber. The inlet pipe passes through the liquid guiding chamber and is rotatably connected to the liquid guiding pipe via a bearing. A drain assembly is connected to the liquid guiding chamber.

3. The liquid-phase reaction mixing device according to claim 2, characterized in that: The drain assembly includes a connecting pipe, the top of which is sealed. The connecting pipe is fixedly connected to the reactor via a bracket. The lower end of the connecting pipe is rotatably connected to a vertical shaft via a bearing. The liquid guiding chamber communicates with the connecting pipe. A drain pipe is provided on the side wall of the connecting pipe. The liquid inlet pipe passes through the top of the connecting pipe and is rotatably connected to the connecting pipe via a bearing.

4. The liquid-phase reaction mixing device according to claim 1, characterized in that: The reactor is equipped with an inlet pipe and an outlet pipe. The inlet pipe is equipped with an inlet valve, and the outlet pipe is equipped with an outlet valve.

5. The liquid-phase reaction mixing device according to claim 1, characterized in that: The reactor is equipped with a temperature sensor and a pressure sensor.

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