High conversion tetrahydrofuran synthesis main reactor
By introducing a filter box and a collection box structure into the tetrahydrofuran synthesis reactor, combined with a stirring assembly and feed inlet control, the problems of impurity cleaning and quantitative catalyst addition were solved, improving the reactor's stability and product purity, and increasing production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QUJING YUESHENG CHEMICAL CO LTD
- Filing Date
- 2025-04-23
- Publication Date
- 2026-07-14
AI Technical Summary
The existing mixing tanks for tetrahydrofuran synthesis lack preliminary filtration and impurity removal steps, which increases the difficulty of product separation and purification, reduces purity and quality, and affects production efficiency and quality.
The tank structure is designed with a filter box and a collection box. The filter box is equipped with a filter screen and a stirring component. The collection box can be easily cleaned by a rotating block and a limiting block. The feed inlet uses a sliding plate and a driving component to quantitatively add the catalyst, ensuring reaction stability and product purity.
This enables convenient removal of impurities after the reaction, ensuring product purity and reaction stability, and improving production efficiency and product quality.
Smart Images
Figure CN224485938U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of chemical machinery, and in particular to a high-conversion tetrahydrofuran synthesis main reactor. Background Technology
[0002] Tetrahydrofuran, as a key organic chemical raw material, is widely used as an excellent solvent in the preparation of surface coatings, anti-corrosion coatings, thin film coatings, and organic chemical reactions such as polymerization and esterification, due to its high polarity, low boiling point, and low toxicity. At the same time, it is also an important raw material for the production of polytetramethylene ether glycol, the manufacture of polyurethane elastic fibers, elastomers, and polyurethane artificial leather, and occupies an important position in the pharmaceutical industry and the precision magnetic tape industry.
[0003] The mixing tank, a key component of the main reactor for high-conversion tetrahydrofuran synthesis, mainly consists of a tank body, a stirring device, heating and cooling components, and inlet and outlet ports. The tank body is made of high-quality corrosion-resistant materials to ensure a stable reaction environment. The stirring device, located at the center of the tank, is driven by a motor. The specially designed blades generate flow fields in different directions during rotation, promoting thorough mixing of the raw materials. The heating and cooling components are implemented through the tank jacket, allowing for precise temperature control according to the reaction progress. During operation, the raw materials are fed into the inlet, and the stirring device rotates at high speed, accelerating molecular collisions and increasing the reaction rate. During the reaction, the heating and cooling components maintain a suitable temperature. After the reaction is complete, the product is discharged from the outlet port. The entire process works in close coordination to effectively improve the conversion rate of tetrahydrofuran synthesis.
[0004] Currently, some mixing tanks used for tetrahydrofuran synthesis have significant shortcomings. After the reaction is completed, there is a lack of preliminary filtration of the product and a cleaning step for impurities generated during the reaction. This not only increases the difficulty of subsequent product separation and purification, but also causes residual impurities to affect the purity and quality of tetrahydrofuran, reducing production efficiency and product quality. Therefore, a high-conversion tetrahydrofuran synthesis main reactor is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above deficiencies, this invention provides a high-conversion tetrahydrofuran synthesis main reactor, which aims to improve the lack of preliminary filtration and impurity centralized treatment steps in the prior art.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A high-conversion tetrahydrofuran synthesis main reactor includes a tank body. A filter box is fixedly connected to the bottom end of the tank body, and a feed inlet is fixedly connected to the top end of the tank body. An adjustment component is installed inside the feed inlet. A collection box is slidably connected inside the filter box. A rotating block is rotatably connected inside the collection box. Fixed rods are fixedly connected to both ends of the rotating block. A transmission rod is rotatably connected to the far end of each of the two fixed rods. A sliding plate is rotatably connected to the far end of each of the two transmission rods. A limit block is fixedly connected to the far end of each of the two sliding plates. A filter screen is fixedly connected inside the filter box. A limiting component is installed on the near side of each of the two sliding plates. A stirring component is installed inside the tank body.
[0008] As a further description of the above technical solution:
[0009] The rotating block is fixedly connected to the outside of a handle, and the limiting block is slidably connected to the inside of the filter box.
[0010] As a further description of the above technical solution:
[0011] The limiting block is externally slidably connected to the inside of the collection box, and the sliding plate is externally slidably connected to the inside of the collection box;
[0012] As a further description of the above technical solution:
[0013] The limiting component includes multiple telescopic columns, with the far ends of the multiple telescopic columns respectively fixedly connected to the near ends of the two sliding plates, and springs are sleeved on the outside of the multiple telescopic columns.
[0014] As a further description of the above technical solution:
[0015] The proximal ends of the plurality of telescopic columns are fixedly connected to the inside of the collection box, and the distal ends of the plurality of springs are respectively fixedly connected to the proximal ends of the two sliding plates. The proximal ends of the plurality of springs are fixedly connected to the inside of the collection box.
[0016] As a further description of the above technical solution:
[0017] The stirring assembly includes a rotating column, which is rotatably connected to the outside of the tank. Multiple stirring rods are fixedly connected to the outside of the rotating column, and a scraper is fixedly connected to the outside of the rotating column. A second motor is fixedly connected to the top of the tank, and the drive end of the second motor is fixedly connected to the top of the rotating column.
[0018] As a further description of the above technical solution:
[0019] The feed inlet is internally slidably connected to a second sliding plate. Both ends of the second sliding plate are fixedly connected to connecting rods. The two connecting rods are rotatably connected to a second transmission rod at their adjacent ends. The two transmission rods are rotatably connected to a sliding frame at their adjacent ends. The sliding frame is internally slidably connected to sliding teeth. The feed inlet is internally fixedly connected to a fixed plate. A drive assembly is provided externally to the feed inlet. Flow grooves are provided inside the second sliding plate and the fixed plate.
[0020] As a further description of the above technical solution:
[0021] The drive assembly includes a motor, which is externally and fixedly connected to the inside of the feed inlet. A rotating rod is fixedly connected to the drive end of the motor, and the end of the rotating rod away from the motor is fixedly connected to the rear end of the sliding tooth.
[0022] This utility model has the following beneficial effects:
[0023] 1. In this utility model, the mixture after reaction is stirred and then enters the filter box. After being filtered by the filter screen, the impurities are retained in the collection box. When the collection box is full, the handle is turned to drive the transmission structure to slide out the limiting block, so that the collection box can be easily removed for cleaning. During installation, the handle is released and the spring pushes the sliding plate to slide the limiting block in, quickly fixing the collection box, improving cleaning efficiency and maintaining the stable operation of the filtration device.
[0024] 2. In this utility model, the processing personnel turn on the motor, which drives the rotating rod to rotate, causing the sliding teeth to slide inside the sliding frame. The movement of the sliding frame, in turn, pulls the sliding plate to slide inside the feed inlet through the transmission rod and connecting rod, so that the flow channel between the sliding plate and the fixed plate switches between connection and blockage. This strictly controls the amount of catalyst added, provides suitable catalytic conditions for the reaction, ensures the stable and efficient progress of the reaction, and guarantees the purity of the product. Attached Figure Description
[0025] Figure 1 This is a three-dimensional schematic diagram of the main reactor for the high-conversion tetrahydrofuran synthesis proposed in this utility model;
[0026] Figure 2 This is a schematic diagram of the rotating column in the high-conversion tetrahydrofuran synthesis main reactor proposed in this utility model;
[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;
[0028] Figure 4 for Figure 2 Enlarged view of point B in the middle.
[0029] Legend:
[0030] 1. Tank body; 2. Inlet; 3. Filter box; 4. Collection box; 5. Rotating block; 6. Fixed rod; 7. Transmission rod one; 8. Sliding plate one; 9. Telescopic column; 10. Spring; 11. Limiting block; 12. Handle; 13. Sliding plate two; 14. Fixed plate; 15. Connecting rod; 16. Transmission rod two; 17. Sliding frame; 18. Sliding teeth; 19. Rotating rod; 20. Motor one; 21. Flow channel; 22. Motor two; 23. Rotating column; 24. Stirring rod; 25. Scraper; 26. Filter screen. Detailed Implementation
[0031] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] Reference Figures 1 to 3 This utility model provides an embodiment of a high-conversion tetrahydrofuran synthesis main reactor, including a tank 1. The tank 1 serves as the main reaction site, providing space for the reaction. The size and shape of the tank 1 are carefully designed to ensure that the reaction can proceed fully. A filter box 3 is fixedly connected to the bottom of the tank 1. The filter box 3 is used to perform preliminary filtration on the mixture after the reaction and separate impurities. An inlet 2 is fixedly connected to the top of the tank 1. The inlet 2 is a channel for adding materials such as catalysts into the tank 1. An adjustment component is set inside the inlet 2 to precisely control the amount of material added. A collection box 4 is slidably connected inside the filter box 3. The collection box 4 is used to collect impurities generated during the filtration process for convenient subsequent centralized cleaning. A rotating block 5 is rotatably connected inside the collection box 4. The rotating block 5 is a key component for controlling the fixing and removal of the collection box 4. The rotation of the rotating block 5 can restrict and release the position of the collection box 4. Fixed rods 6 are fixedly connected to both ends of the rotating block 5. The two fixed rods 6 are used to connect the rotating block 5 and the transmission rod 7, transmitting the rotation of the rotating block 5 to the transmission rod 7.
[0033] Two fixed rods 6 are rotatably connected to transmission rods 7 at their far ends, and two transmission rods 7 are rotatably connected to sliding plates 8 at their far ends. The sliding of sliding plates 8 inside the collection box 4 can drive the movement of limiting blocks 11, thereby fixing and unlocking the collection box 4. Limiting blocks 11 are fixedly connected to the far ends of two sliding plates 8. The outside of limiting blocks 11 is slidably connected to the inside of the filter box 3. The outside of limiting blocks 11 is slidably connected to the inside of the collection box 4. The outside of sliding plates 8 is slidably connected to the inside of the collection box 4. Limiting blocks 11 play a key positioning and fixing role. When limiting blocks 11 slide into the inside of the filter box 3, they can firmly fix the collection box 4 inside the filter box 3 to prevent it from moving during the filtration process. A filter screen 26 is fixedly connected inside the filter box 3. The filter screen 26 can effectively intercept impurities in the reaction mixture and only allow products that meet the requirements to pass through, ensuring the purity of the subsequent products. Limiting components are provided on the adjacent sides of the two sliding plates 8.
[0034] The limiting component provides stable support when the collection box 4 is fixed, and can be easily released when the collection box 4 needs to be removed. The limiting component includes multiple telescopic columns 9, with the distal ends of the multiple telescopic columns 9 fixedly connected to the proximal ends of two sliding plates 8. Each of the multiple telescopic columns 9 is fitted with a spring 10, with the proximal ends of the multiple telescopic columns 9 fixedly connected to the inside of the collection box 4. The distal ends of the multiple springs 10 are fixedly connected to the proximal ends of the two sliding plates 8, and the proximal ends of the multiple springs 10 are fixedly connected to the inside of the collection box 4. The telescopic columns 9 and springs 10 cooperate with each other. When the rotating block 5 is rotated, causing the sliding plate 8 to slide the limiting block 11 out of the filter box 3, the spring 10 is compressed. When the collection box 4 is installed in place, the spring 10 automatically returns to its original state, pushing the sliding plate 8 to slide the limiting block 11 into the filter box 3, thereby quickly fixing the collection box 4 and ensuring that the collection box 4 will not loosen during the filtration process, thus improving the stability of the device.
[0035] Reference Figure 1 , Figure 2 and Figure 4The stirring assembly includes a rotating column 23, which is rotatably connected to the inside of the tank 1. The rotating column 23 is the core component of the stirring assembly. Multiple stirring rods 24 are fixedly connected to the outside of the rotating column 23. The multiple stirring rods 24 are evenly distributed on the outside of the rotating column 23. Driven by the rotating column 23, the raw materials and catalyst in the tank 1 can be stirred in all directions, so that the two can be fully contacted, improve the reaction efficiency, and promote the formation of tetrahydrofuran. A scraper 25 is fixedly connected to the outside of the rotating column 23. The scraper 25 is close to the inner wall of the tank 1. As the rotating column 23 rotates, it can clean the material attached to the inner wall of the tank 1 in time, prevent the material from accumulating and affecting the reaction, and also ensure the uniformity of the reaction. A motor 22 is fixedly connected to the top of the tank 1. The motor 22 provides power for the rotation of the rotating column 23. Its power is reasonably selected to ensure that the rotating column 23 rotates at a suitable speed to achieve the best stirring effect. The drive end of the motor 22 is fixedly connected to the top of the rotating column 23 to ensure stable power transmission.
[0036] A sliding plate 13 is slidably connected inside the feed inlet 2, and a fixed plate 14 is fixedly connected inside the feed inlet 2. The sliding plate 13 can slide inside the feed inlet 2, and through its cooperation with the fixed plate 14, it controls the feeding of the catalyst. Connecting rods 15 are fixedly connected to both ends of the sliding plate 13. The two connecting rods 15 connect the sliding plate 13 and the transmission rod 16, transmitting the movement of the transmission rod 16 to the sliding plate 13. Transmission rods 16 are rotatably connected to the adjacent ends of the two connecting rods 15. A sliding frame 17 is rotatably connected to one end of 16. A sliding tooth 18 is slidably connected inside the sliding frame 17. A drive assembly is provided outside the feed inlet 2. A flow groove 21 is opened inside the sliding plate 13 and the fixed plate 14. When the sliding plate 13 and the flow groove 21 of the fixed plate 14 are aligned, the catalyst can smoothly enter the tank 1 through the feed inlet 2. When the flow grooves 21 of the two are misaligned, the feeding of the catalyst is blocked, thereby realizing precise control of the quantitative feeding of the catalyst, ensuring the stability of the reaction and the quality of the product.
[0037] The drive assembly includes a motor 20, which is externally and fixedly connected to the inside of the feed inlet 2. The motor 20 is the power source for driving the sliding plate 13. Its speed and direction can be adjusted as needed. A rotating rod 19 is fixedly connected to the drive end of the motor 20. The end of the rotating rod 19 away from the motor 20 is fixedly connected to the rear end of the sliding tooth 18. After the motor 20 is started, it drives the rotating rod 19 to rotate, which in turn drives the sliding tooth 18 to slide inside the sliding frame 17. At the same time, the sliding frame 17 moves with the rotation of the rotating rod 19, so that the transmission rods 16 at both ends of the sliding frame 17 pull the sliding plate 13 to slide inside the feed inlet 2 through the connecting rod 15. This achieves precise control of the catalyst feeding, ensures that the amount of catalyst added each time meets the reaction requirements, and improves the controllability of the reaction and the purity of the product.
[0038] Working principle: When processing personnel need to generate high-purity tetrahydrofuran, they add raw materials through the pipe at the front end of tank 1, and then add catalyst into the inside of tank 1 through inlet 2. During the catalyst addition process, motor 20 can be started. Motor 20 drives rotating rod 19 to rotate, thereby causing sliding teeth 18 to slide inside sliding frame 17. At the same time, sliding frame 17 moves with the rotation of rotating rod 19, so that the transmission rods 16 at both ends of sliding frame 17 will pull sliding plate 13 to slide inside inlet 2 through connecting rod 15. This causes the flow channel 21 between sliding plate 13 and fixed plate 14 to change between connection and blockage, thereby realizing the quantitative feeding of catalyst.
[0039] Inside tank 1, the raw materials and catalyst are driven by motor 22 to rotate the rotating column 23, causing the stirring rod 24 to mix the raw materials and catalyst. The reaction product is usually a mixture containing tetrahydrofuran, unreacted butanediol, catalyst, and byproducts. The mixed semi-finished product is then filtered through filter box 3. Impurities in the semi-finished product are collected inside collection box 4. When the collection box is full, the operator can rotate handle 12 to rotate rotating block 5 inside collection box 4, thereby causing fixed rod 6 to pull sliding plate 8 through transmission rod 7 in collection box 4. The internal sliding mechanism causes the sliding plate 8 to slide out of the filter box 3, thereby removing the restriction on the position of the collection box 4. At this point, the operator can slide the collection box 4 out of the filter box 3 for easy centralized cleaning. When installation is required, the collection box 4 is completely slid into the filter box 3. At this point, the operator releases the control of the handle 12, and the spring 10 will automatically push the sliding plate 8 to slide inside the collection box 4, thereby causing the limit block 11 to slide into the filter box 3 from the inside of the collection box 4, thus quickly fixing the collection box 4.
[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A high-conversion tetrahydrofuran synthesis main reactor, comprising a tank (1), characterized in that: A filter box (3) is fixedly connected to the bottom of the tank (1), and an inlet (2) is fixedly connected to the top of the tank (1). An adjustment component is provided inside the inlet (2). A collection box (4) is slidably connected inside the filter box (3). A rotating block (5) is rotatably connected inside the collection box (4). A fixing rod (6) is fixedly connected to both ends of the rotating block (5). A transmission rod (7) is rotatably connected to the far end of the two fixing rods (6). A sliding plate (8) is rotatably connected to the far end of the two transmission rods (7). A limit block (11) is fixedly connected to the far end of the two sliding plates (8). A filter screen (26) is fixedly connected inside the filter box (3). A limiting component is provided on the near side of the two sliding plates (8). A stirring component is provided inside the tank (1).
2. The high-conversion tetrahydrofuran synthesis main reactor according to claim 1, characterized in that: The rotating block (5) is fixedly connected to the outside of a handle (12), and the limiting block (11) is slidably connected to the inside of the filter box (3).
3. The high-conversion tetrahydrofuran synthesis main reactor according to claim 2, characterized in that: The limiting block (11) is externally slidably connected to the inside of the collection box (4), and the sliding plate (8) is externally slidably connected to the inside of the collection box (4).
4. The high-conversion tetrahydrofuran synthesis main reactor according to claim 3, characterized in that: The limiting component includes multiple telescopic columns (9), with the far ends of the multiple telescopic columns (9) respectively fixedly connected to the near ends of the two sliding plates (8), and springs (10) are sleeved on the outside of the multiple telescopic columns (9).
5. The high-conversion tetrahydrofuran synthesis main reactor according to claim 4, characterized in that: The proximal ends of the multiple telescopic columns (9) are fixedly connected to the inside of the collection box (4), and the distal ends of the multiple springs (10) are respectively fixedly connected to the proximal ends of the two sliding plates (8). The proximal ends of the multiple springs (10) are fixedly connected to the inside of the collection box (4).
6. The high-conversion tetrahydrofuran synthesis main reactor according to claim 1, characterized in that: The stirring assembly includes a rotating column (23), which is rotatably connected to the outside of the tank (1). Multiple stirring rods (24) are fixedly connected to the outside of the rotating column (23). A scraper (25) is fixedly connected to the outside of the rotating column (23). A second motor (22) is fixedly connected to the top of the tank (1). The driving end of the second motor (22) is fixedly connected to the top of the rotating column (23).
7. The high-conversion tetrahydrofuran synthesis main reactor according to claim 1, characterized in that: The feed inlet (2) is internally connected to a sliding plate two (13), both ends of the sliding plate two (13) are fixedly connected to connecting rods (15), the two connecting rods (15) are rotatably connected to a transmission rod two (16) at their adjacent ends, the two transmission rods two (16) are rotatably connected to a sliding frame (17), the sliding frame (17) is internally connected to a sliding tooth (18), the feed inlet (2) is internally fixedly connected to a fixing plate (14), the feed inlet (2) is externally provided with a driving assembly, and the sliding plate two (13) and the fixing plate (14) are internally provided with a flow groove (21).
8. The high-conversion tetrahydrofuran synthesis main reactor according to claim 7, characterized in that: The drive assembly includes a motor (20), which is externally fixedly connected to the inside of the feed inlet (2). A rotating rod (19) is fixedly connected to the drive end of the motor (20), and the end of the rotating rod (19) away from the motor (20) is fixedly connected to the rear end of the sliding tooth (18).