Residual solvent removal device for nanofiltration separation membrane preparation

Abstract

The invention discloses a residual solvent removal device for nanofiltration separation membrane preparation, and relates to the technical field of solvent removal, the residual solvent removal device comprises a base, and the output end part of a servo motor is provided with a separation mechanism for assisting filtration; the separation mechanism comprises an output shaft, the output shaft is arranged at the output end of the servo motor, a centrifugal filter cartridge is arranged on the outer surface of the output shaft, and the centrifugal filter cartridge is arranged on the inner side face of the separation box; a storage cylinder is arranged at the top end of the base, and a stirring mechanism is arranged on the inner side face of the storage cylinder. According to the residual solvent removal device for preparing the nanofiltration separation membrane, the separation mechanism and the stirring mechanism are combined, the removal efficiency of a residual solvent is effectively improved, a centrifugal filter cartridge in the separation mechanism is driven by a servo motor to rotate at a high speed, strong centrifugal force is generated, the solvent and the nanofiltration separation membrane are rapidly separated, and the separation efficiency is improved. Meanwhile, the design of the spiral conveying rod ensures the continuous discharge of the solvent, and the accumulation of the solvent in the equipment is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solvent removal, in particular to a residual solvent removal device for preparation of nanofiltration separation membrane. BACKGROUND

[0002] Membrane separation technology is a technology that uses a selective permeation membrane as a separation medium, applies a certain driving force on both sides of the membrane, and makes certain components in the raw material selectively permeate through the membrane to achieve separation of the mixture. In the process of preparing membrane materials, removing residual solvents in the membrane body is an important step to ensure the performance and safety of the membrane materials, so solvent removal equipment is needed to remove the residual solvents.

[0003] However, the existing solvent removal device effectively increases the mixing effect of steam and materials when in use by using a water vapor distillation device, and improves the distillation effect, but lacks a flow control device. In addition, the water vapor system inevitably contains a small amount of foreign matter, which cannot be tolerated if it is brought into the product.

[0004] In order to solve the above-mentioned defects, the existing technology discloses a residual solvent removal device with publication number CN219646729U, which includes a gas pocket and a distributor. The gas pocket and the distributor are connected by a pressure-resistant pipeline. The distributor is arranged at the bottom of the inner cavity of the distillation device. Gas holes are formed on the distributor, and the gas holes are arranged to face the bottom surface or the side surface of the inner cavity of the distillation device. The gas pocket includes a cylinder. An upper end of the cylinder is provided with an upper end cover. A pressure gauge for monitoring the gas pressure in the cylinder and a safety valve are installed on the upper end cover. A detachable filter screen for removing foreign matter in steam and gas is installed in the inner part of the cylinder. A gap is left between the bottom of the detachable filter screen and the bottom of the cylinder. The inlet pipeline is arranged on the inner side of the detachable filter screen, and the outlet pipeline is arranged on the outer side of the detachable filter screen. The distributor adopts a ring shape, a row pipe shape, or a star shape. The gas holes adopt a punching or a metal sintered plate mode. At least one material inlet for allowing steam or gas to enter the cylinder and one material outlet for allowing steam or gas to exit the cylinder are formed on the cylinder. The material inlet is arranged higher than the material outlet. An inlet pipeline and an outlet pipeline are respectively connected to the material inlet and the material outlet. The device is suitable for a reduced pressure or normal pressure distillation system. After most of the solvents are evaporated, nitrogen or water vapor is introduced to further remove the residual solvents in the materials.

[0005] And the patent with publication number CN222286406U discloses a multi-stage spiral solvent removal device, which comprises a first spiral solvent removal mechanism, a second spiral solvent removal mechanism and a third spiral solvent removal mechanism connected in sequence from top to bottom. The second spiral solvent removal mechanism comprises a second spiral feeder, the feed end of the second spiral feeder is in communication with the discharge end of the first spiral feeder, a steam jacket is arranged on the shell side wall of the second spiral feeder, and a nitrogen inlet is also arranged on the shell side wall of the second spiral feeder. The third spiral solvent removal mechanism comprises a third spiral feeder, the feed end of the third spiral feeder is in communication with the discharge end of the second spiral feeder, and a cooling water jacket is arranged on the shell side wall of the third spiral feeder. By arranging the first spiral solvent removal mechanism, the second spiral solvent removal mechanism and the third spiral solvent removal mechanism connected in sequence from top to bottom, the material is preliminarily heated by the first spiral solvent removal mechanism, the preliminarily heated material enters the second spiral solvent removal mechanism, the material is uniformly heated as a whole in this process, the organic solvent volatilization effect is good, and at the same time, the spiral feeder is adopted for feeding, so that continuous feeding without interruption can be realized, the product quantity heated at a time is large, the efficiency of removing the organic solvent is greatly improved, and the production requirements can be met.

[0006] The above device realizes effective removal of solvent by using various structural combinations during use, but the flow control during solvent removal of the above device is not accurate enough, which may lead to incomplete removal of solvent or excessive treatment, affecting the quality of nanofiltration separation membrane. SUMMARY

[0007] The purpose of the present application is to provide a residual solvent removal device for nanofiltration separation membrane preparation to solve the problems of flow control deficiency and foreign matter mixing into the product in the solvent removal device mentioned in the background.

[0008] To achieve the above purpose, the present application provides the following technical scheme: a residual solvent removal device for nanofiltration separation membrane preparation, comprising a base, a mounting seat is arranged at the top end of the base, a separation tank is arranged at the top end of the mounting seat, a servo motor is arranged on the bottom surface of the mounting seat, and an auxiliary filtering separation mechanism is arranged on the output end of the servo motor; the separation mechanism comprises an output shaft, the output shaft is arranged on the output end of the servo motor, a centrifugal filter cartridge is arranged on the outer surface of the output shaft, and the centrifugal filter cartridge is arranged on the inner side of the separation tank; a storage cylinder is arranged at the top end of the base, and an auxiliary separation stirring mechanism is arranged on the inner side of the storage cylinder.

[0009] Further, a bevel gear one is arranged on the outer surface of the output shaft, the bevel gear one and a bevel gear two are meshed and connected, and a spiral conveying rod is arranged on the outer surface of the bevel gear two.

[0010] Further, the outer surface of the spiral conveying rod is provided with a sealing disc, the outer surface of the sealing disc is provided with a shell, and the shell is arranged on the inner side of the mounting seat.

[0011] Further, the outer surface of the shell is provided with a connecting pipe, the connecting end of the connecting pipe is provided with a separation box, and the outer surface of the connecting pipe is provided with a solenoid valve.

[0012] Further, the bottom surface of the storage cylinder is provided with a stepping motor, and the outer surface of the storage cylinder is provided with a shell.

[0013] Further, the stirring mechanism comprises a rotating rod, the rotating rod is arranged at the output end of the stepping motor, the outer surface of the rotating rod is provided with a stirring roller, and the stirring roller is used for stirring the solution.

[0014] Further, the top end of the storage cylinder is provided with a transmission pipe, and the outer surface of the transmission pipe is provided with a heating assembly.

[0015] Further, the outer surface of the storage cylinder is provided with a communication pipe, the outer surface of the communication pipe is provided with a collection box, and the bottom surface of the collection box is provided with a detachable support seat.

[0016] Further, the top end of the storage cylinder is provided with an exhaust pipe, the outer surface of the exhaust pipe is provided with a support seat, the inner side of the exhaust pipe is provided with a threaded pipe, the outer surface of the threaded pipe is provided with a connecting cylinder, the top end of the connecting cylinder is provided with a fixing pipe, and the outer surface of the fixing pipe is provided with a collection box.

[0017] Further, the top end of the connecting cylinder is provided with a three-way pipe, the connecting end of the three-way pipe is provided with a vacuum air pump, the outer surface of the three-way pipe is provided with a pressure detector, and the outer surface of the connecting cylinder is provided with a handle.

[0018] Compared with the prior art, the beneficial effects of the present application are: (1) By setting the separation mechanism in combination with the stirring mechanism, the removal efficiency of the residual solvent is effectively improved, the centrifugal filter in the separation mechanism rotates at high speed under the drive of the servo motor, generates a strong centrifugal force, and separates the solvent from the nanofiltration separation membrane quickly, and the design of the spiral conveying rod ensures the continuous discharge of the solvent, avoiding the accumulation of the solvent in the equipment; (2) The stirring mechanism rotates the stirring roller by the stepping motor, fully stirs the solution in the storage cylinder, further accelerates the volatilization and removal of the solvent, accurately controls the flow of the solvent through the solenoid valve, prevents the residual solvent caused by excessive flow, and effectively intercepts the foreign matters in the steam and gas through the detachable filter screen and the collection box, ensuring the purity of the product; (3) Through integrated design, the functions of separation, stirring, heating and vacuum pumping are integrated into one, which not only simplifies the operation process, but also improves the overall operating efficiency of the equipment. The setting of the heating component allows the solvent to evaporate faster at a suitable temperature, while the vacuum pump is connected to the exhaust pipe through a three-way pipe to form a negative pressure environment, which further promotes the evaporation and collection of the solvent. (4) The pressure detector can monitor the pressure changes inside the device in real time, ensuring that the entire removal process is carried out under safe and stable conditions. The structural design fully considers ease of use and maintainability. The connecting pipe, transmission pipe and connecting pipe and other components adopt standardized interface design, which facilitates quick installation and disassembly. When equipment cleaning or component replacement is required, the operator can easily complete the relevant operations, greatly shortening downtime and improving production efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the mounting base of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the separation box of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the centrifugal filter cartridge of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the outer shell of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the storage cylinder of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the collection box of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the stirring roller of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the connecting cylinder of the present invention; Figure 10 This is a three-dimensional structural diagram of the exhaust pipe of the present invention.

[0020] In the diagram: 1. Base; 2. Mounting seat; 3. Separation box; 4. Storage cylinder; 5. Servo motor; 6. Output shaft; 7. Centrifugal filter cartridge; 8. Bevel gear one; 9. Bevel gear two; 10. Spiral conveyor rod; 11. Sealing disc; 12. Outer shell; 13. Connecting pipe; 14. Solenoid valve; 15. Stepper motor; 16. Rotating rod; 17. Stirring roller; 18. Transmission pipe; 19. Heating component; 20. Connecting pipe; 21. Collection box; 22. Exhaust pipe; 23. Support seat; 24. Connecting cylinder; 25. T-pipe; 26. Vacuum pump; 27. Fixing pipe; 28. Threaded pipe; 29. ​​Handle. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figure 1 - Figure 2 The present invention provides the following technical solution: a residual solvent removal device for nanofiltration membrane preparation, comprising a base 1, a mounting seat 2 at the top of the base 1, a separation box 3 at the top of the mounting seat 2, a servo motor 5 at the bottom surface of the mounting seat 2, and an auxiliary filtration separation mechanism at the output end of the servo motor 5; the separation mechanism includes an output shaft 6, which is located at the output end of the servo motor 5, and a centrifugal filter cartridge 7 is located on the outer surface of the output shaft 6, which is located on the inner side of the separation box 3; a storage cylinder 4 is located at the top of the base 1, and an auxiliary separation stirring mechanism is located on the inner side of the storage cylinder 4.

[0023] The stirring mechanism ensures thorough stirring of the solution within the storage tank 4, allowing for more uniform heating and evaporation of the solvent, thus improving solvent removal efficiency and effectiveness. Specifically, when the stepper motor 15 starts, it drives the rotating rod 16 to rotate, causing the stirring roller 17 to move in a circular motion within the solution. This stirring method breaks down local concentration differences in the solution, promoting the diffusion and evaporation of solvent molecules. Simultaneously, the design of the stirring roller 17 takes into account the shear force on the solution to avoid damage to the nanofiltration membrane. Furthermore, the device utilizes the transfer pipe 18 and the heating component 19 to heat the solution within the storage tank 4. The heating component 19 can adjust the temperature as needed to ensure solvent removal occurs within the optimal temperature range. This heating method not only increases the solvent evaporation rate but also helps kill any microorganisms that may be present in the solution, preserving... To ensure product safety and quality, the device also achieves timely collection and treatment of evaporated solvent during the solvent removal process through the connecting pipe 20 and the collection box 21. The connecting pipe 20 connects the storage cylinder 4 to the collection box 21, allowing the evaporated solvent to smoothly enter the collection box 21. The detachable support base 23 at the bottom of the collection box 21 facilitates cleaning and replacement of the collection box 21, ensuring the continuous and stable operation of the device. The device also achieves the regulation and control of the internal air pressure through the coordinated use of components such as the exhaust pipe 22, the threaded pipe 28, the connecting cylinder 24, and the vacuum pump 26. During the solvent removal process, the vacuum pump 26 can extract the gas inside the device to form a negative pressure environment, thereby accelerating the evaporation and removal of solvent. The pressure detector can monitor the changes in the internal air pressure of the device in real time, ensuring that the device operates within a safe air pressure range.

[0024] Example 2: Based on Example 1, please refer to... Figure 2 - Figure 6 The outer casing 12 is also disclosed, and its specific structure is as follows: a bevel gear 8 is provided on the outer surface of the output shaft 6, and bevel gear 8 and bevel gear 9 are meshed and connected. A spiral conveying rod 10 is provided on the outer surface of the bevel gear 9. A sealing disc 11 is provided on the outer surface of the spiral conveying rod 10. An outer casing 12 is provided on the outer surface of the sealing disc 11. The outer casing 12 is located on the inner side of the mounting base 2. A connecting pipe 13 is provided on the outer surface of the outer casing 12. A separation box 3 is provided at the connecting end of the connecting pipe 13. A solenoid valve 14 is provided on the outer surface of the connecting pipe 13. A stepper motor 15 is provided on the bottom surface of the storage cylinder 4. The outer casing 12 is provided on the outer surface of the storage cylinder 4.

[0025] Through its designed separation mechanism, this device achieves effective separation of residual solvent in the solution. Specifically, it is composed of... Figure 4It can be seen that when the servo motor 5 starts, it drives the output shaft 6 to rotate. The output shaft 6 drives the centrifugal filter cartridge 7 to rotate at high speed inside the separation chamber 3. The centrifugal force generated by this rotation effectively separates the solvent molecules in the solution. The solvent molecules are thrown against the inner wall of the centrifugal filter cartridge 7 and finally discharged from the device through a specific channel, realizing the initial separation of solvent and membrane material. At the same time, the meshing connection design of bevel gear 8 and bevel gear 9 allows the rotation of the output shaft 6 to be accurately transmitted to the screw conveyor 10. The rotation of the screw conveyor 10 further assists the solvent conveying and separation process, ensuring the continuity and efficiency of solvent removal. The solenoid valve 14 allows for precise control of the opening and closing of the connecting pipe 13, thereby adjusting the flow of solution between the separation chamber 3 and the storage cylinder 4 according to actual needs. This design not only improves the efficiency of solvent removal but also enables the device to adapt to the processing needs of different types and concentrations of solutions. The outer casing 12 provides a more stable and secure support structure for the entire device. It not only protects key internal components, such as the spiral conveyor rod 10 and the sealing disc 11, from external environmental contamination and damage, but also connects to the separation chamber 3 via the connecting pipe 13, ensuring smooth material transfer during solvent removal. The solenoid valve 14 allows for precise control of the connection pipe 13, enabling adjustment of the solvent removal rate according to actual needs. Furthermore, the design of the outer casing 12 considers heat dissipation; its rational structural layout and material selection help maintain a stable temperature during long-term operation, improving the device's lifespan and reliability. The stepper motor 15 is located on the bottom of the storage cylinder 4 and is tightly connected to it via the outer casing 12, ensuring stable operation of the stirring mechanism. This layout not only saves space but also makes the overall structure of the device more compact and rational.

[0026] Example 3: Based on Example 1, please refer to... Figure 6 - Figure 10The support base 23 is also disclosed, and its specific structure is as follows: The stirring mechanism includes a rotating rod 16, which is located at the output end of the stepper motor 15. A stirring roller 17 is provided on the outer surface of the rotating rod 16. The stirring roller 17 is used to stir the solution. A transmission pipe 18 is provided at the top of the storage cylinder 4. A heating component 19 is provided on the outer surface of the transmission pipe 18. A connecting pipe 20 is provided on the outer surface of the storage cylinder 4. A collection box 21 is provided on the outer surface of the connecting pipe 20. A detachable support base 23 is provided on the bottom surface of the collection box 21. The top of the cylinder 4 is provided with an exhaust pipe 22, the outer surface of the exhaust pipe 22 is provided with a support base 23, the inner side of the exhaust pipe 22 is provided with a threaded pipe 28, the outer surface of the threaded pipe 28 is provided with a connecting cylinder 24, the top of the connecting cylinder 24 is provided with a fixing pipe 27, the outer surface of the fixing pipe 27 is provided with a collection box 21, the top of the connecting cylinder 24 is provided with a three-way pipe 25, the connecting end of the three-way pipe 25 is provided with a vacuum pump 26, the outer surface of the three-way pipe 25 is provided with a pressure detector, and the outer surface of the connecting cylinder 24 is provided with a handle 29.

[0027] Through the rational design and arrangement of the support base 23, a stable support is provided for the key components of the entire device, ensuring the stability and safety of the device during operation. Figure 10 It can be seen that the detachable support base 23 on the bottom surface of the collection box 21 not only facilitates the installation and disassembly of the collection box 21, but also facilitates regular cleaning and maintenance of the collection box 21, thereby ensuring the cleanliness of the inside of the collection box 21 and preventing solvent residue from affecting subsequent collection work. The support base 23 on the outer surface of the exhaust pipe 22 effectively supports the exhaust pipe 22, avoiding deformation or damage to the exhaust pipe 22 due to gravity or airflow impact during long-term use. At the same time, the tight fit between the threaded tube 28 on the inner side of the exhaust pipe 22 and the connecting cylinder 24 ensures the tightness between the exhaust pipe 22 and the connecting cylinder 24. The airtight seal prevents gas leakage and ensures stable regulation of the internal gas pressure. The three-way pipe 25 allows the vacuum pump 26 to be connected to both the exhaust pipe 22 and the connecting cylinder 24 simultaneously, enabling effective extraction of gas from the device and creating a negative pressure environment that accelerates solvent evaporation and removal. Real-time monitoring by the pressure detector ensures that the device operates within a safe pressure range, preventing damage caused by excessively high or low pressure. The handle 29 on the outer surface of the connecting cylinder 24 facilitates handling and installation by operators, improving the ease of use of the device.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A residual solvent removal device for nanofiltration membrane preparation, comprising a base (1), wherein a mounting seat (2) is provided at the top of the base (1), characterized in that: The top of the mounting base (2) is provided with a separation box (3), the bottom surface of the mounting base (2) is provided with a servo motor (5), and the output end of the servo motor (5) is provided with an auxiliary filtration separation mechanism. The separation mechanism includes an output shaft (6), which is located at the output end of the servo motor (5). A centrifugal filter cartridge (7) is provided on the outer surface of the output shaft (6), and the centrifugal filter cartridge (7) is located on the inner side of the separation box (3). The top of the base (1) is provided with a storage cylinder (4), and the inner side of the storage cylinder (4) is provided with an auxiliary separation stirring mechanism.

2. The residual solvent removal device for nanofiltration membrane preparation according to claim 1, characterized in that: The outer surface of the output shaft (6) is provided with a bevel gear one (8), the bevel gear one (8) and the bevel gear two (9) are meshed and connected, and the outer surface of the bevel gear two (9) is provided with a spiral conveying rod (10).

3. The residual solvent removal device for nanofiltration membrane preparation according to claim 2, characterized in that: The outer surface of the spiral conveyor rod (10) is provided with a sealing disc (11), and the outer surface of the sealing disc (11) is provided with a housing (12), which is located on the inner side of the mounting base (2).

4. The residual solvent removal device for nanofiltration membrane preparation according to claim 3, characterized in that: The outer surface of the outer shell (12) is provided with a connecting pipe (13), the connecting end of the connecting pipe (13) is provided with a separation box (3), and the outer surface of the connecting pipe (13) is provided with a solenoid valve (14).

5. The residual solvent removal device for nanofiltration membrane preparation according to claim 1, characterized in that: A stepper motor (15) is provided on the bottom surface of the storage cylinder (4), and a shell (12) is provided on the outer surface of the storage cylinder (4).

6. The residual solvent removal device for nanofiltration membrane preparation according to claim 1, characterized in that: The stirring mechanism includes a rotating rod (16), which is located at the output end of a stepper motor (15). A stirring roller (17) is provided on the outer surface of the rotating rod (16), and the stirring roller (17) is used to stir the solution.

7. The residual solvent removal device for nanofiltration membrane preparation according to claim 1, characterized in that: The storage cylinder (4) is provided with a transmission pipe (18) at its top end, and a heating component (19) is provided on the outer surface of the transmission pipe (18).

8. The residual solvent removal device for nanofiltration membrane preparation according to claim 7, characterized in that: The outer surface of the storage cylinder (4) is provided with a connecting pipe (20), the outer surface of the connecting pipe (20) is provided with a collection box (21), and the bottom surface of the collection box (21) is provided with a detachable support base (23).

9. The residual solvent removal device for nanofiltration membrane preparation according to claim 8, characterized in that: The storage cylinder (4) is provided with an exhaust pipe (22) at the top, a support base (23) is provided on the outer surface of the exhaust pipe (22), a threaded pipe (28) is provided on the inner side of the exhaust pipe (22), a connecting cylinder (24) is provided on the outer surface of the threaded pipe (28), a fixing pipe (27) is provided at the top of the connecting cylinder (24), and a collection box (21) is provided on the outer surface of the fixing pipe (27).

10. The residual solvent removal device for nanofiltration membrane preparation according to claim 9, characterized in that: The top end of the connecting cylinder (24) is provided with a three-way pipe (25), the connecting end of the three-way pipe (25) is provided with a vacuum pump (26), the outer surface of the three-way pipe (25) is provided with a pressure detector, and the outer surface of the connecting cylinder (24) is provided with a handle (29).

Images