A high-efficiency cyclization micro-reactor device for pyrazolidine carboxylic acid ethyl ester

Abstract

The application discloses a high-efficiency cyclization micro-reaction device for pyrazolidine ethyl formate, and relates to the technical field of reaction devices.The device comprises a bottom plate, a stirring unit, an acid-base unit, a heat exchange unit, a heat conduction unit and a heat preservation unit.The top of the bottom plate is provided with a reaction cylinder.The stirring unit is arranged on the top of the reaction cylinder.The acid-base unit is arranged on the top of the stirring unit.The heat exchange unit is arranged on one side of the reaction cylinder, and is used for recycling the temperature of the solution in the reaction cylinder.The heat conduction unit is arranged on one side of the heat exchange unit, and is used for accelerating the heat exchange speed between the solution in the reaction cylinder and the heat exchange unit.The heat preservation unit is used for storing the solution in the reaction cylinder, and can further reuse the temperature of the solution in the reaction cylinder.The device can transfer the heat of the solution in the reaction cylinder which has reacted to the raw material for the next reaction in the heat exchange box, realizes the recycling of the heat in the reaction cylinder, and saves electric energy.

Description

Technical Field

[0001] This invention relates to the field of reaction apparatus technology, specifically to a highly efficient cyclization microreactor for ethyl pyrazolidine carboxylate. Background Technology

[0002] The production of ethyl pyrazolidine carboxylate involves using a reaction apparatus to react the raw materials. The product is generated by condensing the raw materials at a suitable temperature. During the reaction, the temperature of the raw materials needs to be controlled. Appropriate heating can accelerate the reaction rate. In traditional reaction apparatuses, the heat of the solution is usually dissipated into the air after heating, resulting in heat waste.

[0003] The existing reaction apparatus has the following drawbacks:

[0004] 1. The prior art JP2008184452A discloses a reaction apparatus that provides a reaction apparatus for the highly selective production of aldehydes from alcohols. After the product is produced, if the reaction liquid is heated, the heat of the liquid cannot be recovered and will be dissipated into the air, resulting in heat waste. Therefore, there is a need for a highly efficient cyclization microreactor for ethyl pyrazolidine carboxylate that can recover and utilize the temperature of the reaction liquid to solve this problem.

[0005] 2. Existing technology EP2944913A1 discloses a heat exchange device that provides a solution for cooling recirculated gas in an EGR (exhaust gas recirculation) system. After the device transfers heat from the hot gas to the cold air, the temperatures of the hot and cold gases tend to be isothermal. After this, the heat from the hot gas can no longer be transferred to the cold gas, and a large amount of heat remains that cannot be recovered and reused, resulting in significant heat waste. Therefore, a highly efficient cyclization microreactor for ethyl pyrazolidine carboxylate is needed to solve this problem, which can achieve a higher heat recovery rate from hot objects.

[0006] 3. The prior art JP2009241029A discloses a reaction device that provides a reaction device that reduces heat loss and enables miniaturization. However, this device cannot recover and reuse the heat from the hot object. If the heat inside the reaction device is transferred to an external object, the heat transfer efficiency is affected by the heat conduction area. When the heat conduction area is small, the heat transfer speed will also be low. Therefore, a high-efficiency cyclization microreactor for ethyl pyrazolidine carboxylate is needed to solve this problem, which can recover the heat of the reactants and improve the heat recovery speed.

[0007] 4. The prior art CN106754314B discloses a bioreactor, which solves the problem of slow reaction speed. When adding acid-base liquid conditioning solution into the device, the end cap of the device needs to be opened. However, opening the end cap will cause heat loss inside the device, which wastes heat. Therefore, a high-efficiency cyclization microreactor for ethyl pyrazolidine carboxylate is needed to solve this problem by minimizing heat loss when adding acid-base liquid into the device. Summary of the Invention

[0008] One objective of this application is to provide a highly efficient cyclization microreactor for ethyl pyrazolidine carboxylate, which can solve the technical problems raised in the prior art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency cyclization microreactor for ethyl pyrazolidine carboxylate, comprising a base plate, a stirring unit, an acid-base unit, a heat exchange unit, a heat conduction unit, and a heat preservation unit. A reaction cylinder is installed on the top of the base plate. The stirring unit is located on the top of the reaction cylinder for stirring the materials. The acid-base unit is located on the top of the stirring unit for adjusting the acidity or alkalinity of the solution inside the reaction cylinder. The heat exchange unit is located on one side of the reaction cylinder for recovering the temperature of the solution inside the reaction cylinder and reducing heat loss.

[0010] The heat-conducting unit is located on one side of the heat exchange unit to accelerate the heat exchange rate between the solution inside the reaction cylinder and the heat exchange unit. The heat-insulating unit is used to store the solution inside the reaction cylinder, which can further reuse the temperature of the solution in the reaction cylinder.

[0011] Preferably, support columns are symmetrically installed at the bottom of the base plate, a hand valve is installed at the output end of the front of the reaction cylinder, a discharge pipe is installed at the output end of the hand valve, a feed pipe is installed at the input end of the front of the reaction cylinder, a hand valve is installed at the input end of the feed pipe, a feed hopper is installed at the input end of the hand valve, and a heating rod is installed inside the reaction cylinder, with the heating rod located below the rotating rod.

[0012] Preferably, the stirring unit includes a cylinder cover, a motor, a rotating rod, a stirring rod, and a transparent plate. The cylinder cover is installed on the top of the reaction cylinder, the motor is installed on the top of the cylinder cover, the rotating rod is installed at the output end of the motor, multiple stirring rods are symmetrically installed on the outer side of the rotating rod, and the transparent plate is installed through the top of the cylinder cover.

[0013] Preferably, the pH unit includes a frame, a storage box, a second discharge pipe, a first solenoid valve, a first delivery pipe, and a pH meter. The frame is installed on the top of the cylinder cover, and the storage boxes are symmetrically installed on the top of the frame. The second discharge pipe is installed at the bottom output end of the storage box, and one end of the second discharge pipe penetrates the top inner wall of the frame. The first solenoid valve is installed at the output end of the second discharge pipe, and the first delivery pipe is installed at the output end of the first solenoid valve, and one end of the first delivery pipe penetrates the bottom of the cylinder cover. The pH meter is installed through and installed on one side of the reaction cylinder.

[0014] Preferably, the heat exchange unit includes a temperature sensing unit 1, a heat-conducting plate 1, a heat exchange box, a feed pipe 2, a pipe cover, a pump 1, a delivery pipe 2, a delivery pipe 3, a temperature sensing unit 2, a hydraulic unit 1, a connecting rod, a heat-insulating arc plate, and a transparent plate 2. The temperature sensing unit 1 is installed through one side of the reaction cylinder. Multiple heat-conducting plates 1 are installed on the inner wall of one side of the reaction cylinder, and the heat-conducting plates 1 are located below the rotating rod. The heat exchange box is installed on one side of the reaction cylinder. The feed pipe 2 is installed on the top of the heat exchange box. A pipe cover is detachably installed on the outer side of the feed pipe 2. The pump... One pump is installed on the top of the cylinder cover. The input end of the pump is connected to the second conveying pipe, one end of which penetrates the bottom of the cylinder cover. The output end of the pump is connected to the third conveying pipe, which is connected to the input end of the heat exchange box. The front of the heat exchange box is connected to the second temperature sensing unit. The top of the heat exchange box is symmetrically equipped with the first hydraulic unit. The output end of the first hydraulic unit is connected to the connecting rod. A heat insulation arc plate is installed on one side of the connecting rod, and the bottom of the heat insulation arc plate penetrates the top inner wall of the heat exchange box. The top of the heat exchange box is connected to the second transparent plate.

[0015] Preferably, the heat-conducting unit includes a second hydraulic unit, a second heat-conducting plate, and a third heat-conducting plate. Two second hydraulic units are symmetrically installed on one side of the heat exchange box. The output end of the second hydraulic unit is equipped with a second heat-conducting plate, and a plurality of third heat-conducting plates are installed on one side of the second heat-conducting plate.

[0016] Preferably, the heat preservation unit includes a heat preservation box, a temperature sensing unit three, a manual valve three, a pump two, a delivery pipe four, a solenoid valve two, a delivery pipe five, and a transparent plate three. The heat preservation box is installed on one side of the heat exchange box. The temperature sensing unit three is installed through the front of the heat preservation box. The manual valve three is installed at the output end of one side of the heat preservation box. The pump two is installed on the top of the base plate. The delivery pipe four is installed at the input end of the pump two. The input end of the delivery pipe four is connected to the output end of the reaction cylinder. The solenoid valve two is installed at the output end of the pump two. The delivery pipe five is installed at the output end of the solenoid valve two, and the output end of the delivery pipe five is connected to the input end of the heat preservation box. The transparent plate three is installed through the top of the heat preservation box.

[0017] Preferably, a control unit is installed on the top of the base plate. The control unit is electrically connected to the motor, solenoid valve one, heating rod, temperature sensing unit one, pump one, pump two, temperature sensing unit two, hydraulic unit one, hydraulic unit two, and temperature sensing unit three.

[0018] Preferably, the method of using the high-efficiency cyclization microreactor for ethyl pyrazolidine carboxylate is as follows:

[0019] S1. First, open the second hand valve and add the raw material from the feed hopper into the reaction cylinder. Then, turn on the heating rod to heat the solution inside the reaction cylinder. The temperature of the solution inside the reaction cylinder is detected by the temperature sensing unit and the temperature information is transmitted to the control unit. After the temperature reaches the set temperature, the control unit controls the heating rod to stop heating. Then, the motor is started to drive the stirring rod to stir the solution inside the reaction cylinder, thereby accelerating the reaction speed of the solution.

[0020] S2. Add the acidic and alkaline conditioning solutions to the two storage boxes respectively, and then adjust the acidity or alkalinity of the solution inside the reaction cylinder by alternately controlling the opening of the two solenoid valves.

[0021] S3. After the solution reaction inside the reaction cylinder is completed, another raw material is added to the heat exchange box. Then, the hydraulic unit is activated to control the heat insulation arc plate to move upward, so that the temperature of the solution inside the reaction cylinder can be transferred to the raw material in the heat exchange box through the reaction cylinder, so that the heat of the solution in the reaction cylinder can be recovered and reused. When the temperature in the reaction cylinder measured by the temperature sensing unit 1 is the same as the temperature in the heat exchange box measured by the temperature sensing unit 2, the control unit controls the pump 2 to draw the raw material in the reaction cylinder into the heat preservation box.

[0022] S4. After the raw materials in the reaction cylinder are discharged, the raw materials in the heat exchange box are drawn into the reaction cylinder by starting the pump. Then, the raw materials are heated by the heating rod, and the motor drives the stirring rod to stir the raw materials to make them react quickly.

[0023] Preferably, step S3 further includes the following steps:

[0024] S31. After the heat insulation arc plate moves upward, the hydraulic unit two is activated to drive the heat conduction plate two to move towards the reaction cylinder and make the heat conduction plate two contact with the reaction cylinder, so that the heat of the reaction cylinder is transferred to the heat conduction plate two and the heat conduction plate three, increasing the heat conduction area, so that the heat of the solution inside the reaction cylinder can be transferred to the raw material in the heat exchange box more quickly.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. After the reaction of materials inside the reaction cylinder is completed, the heat of the solution inside the reaction cylinder can be transferred to the raw materials inside the heat exchange box by moving the heat insulation arc plate upward. The heat of the already reacted solution inside the reaction cylinder can be transferred to the raw materials for the next reaction inside the heat exchange box, realizing the recovery and utilization of the easily generated heat inside the reaction cylinder, saving electrical energy. The high-efficiency cyclization microreactor used for ethyl pyrazolidine carboxylate can transfer the heat of the already reacted solution inside the reaction cylinder to the raw materials for the next reaction inside the heat exchange box, realizing the recovery and utilization of the easily generated heat inside the reaction cylinder, saving electrical energy.

[0027] 2. This invention transfers the solution, which still retains some heat after some heat has been transferred from the reaction chamber to the heat exchange box, to the insulation box. This achieves heat preservation of the heat exchange box, allowing subsequent raw materials added to the heat exchange box to be preheated by the product inside the insulation box. Furthermore, it enables the recovery and utilization of heat from the produced product, further saving energy. The high-efficiency cyclization microreactor used for ethyl pyrazolidine carboxylate can transfer the solution with residual heat from the reaction chamber to the insulation box. The solution inside the insulation box can preheat the raw materials subsequently heated to the heat exchange box, further enabling the recovery and utilization of heat from the produced product.

[0028] 3. This invention increases the heat conduction area for transferring heat from the solution inside the reaction chamber to the raw material inside the heat exchange box through heat conduction plate one, heat conduction plate two, and heat conduction plate three. This accelerates the heat transfer rate from the solution inside the reaction chamber to the solution inside the heat exchange box, thereby achieving high-efficiency heat recovery. The high-efficiency cyclization microreactor for ethyl pyrazolidine carboxylate can increase the heat conduction area for transferring heat from the solution inside the reaction chamber to the raw material inside the heat exchange box through heat conduction plate one, heat conduction plate two, and heat conduction plate three. This accelerates the heat transfer rate from the solution inside the reaction chamber to the solution inside the heat exchange box.

[0029] 4. This invention can store acidic and alkaline solutions through a storage box. When adjusting the pH of the solution inside the reaction cylinder, only one solenoid valve needs to be opened to add the acidic or alkaline liquid from the storage box into the reaction cylinder, without opening the cylinder lid. This reduces the rate of heat loss and saves energy. The high-efficiency cyclization microreactor used for ethyl pyrazolidine carboxylate only requires opening one solenoid valve to add the acidic or alkaline liquid from the storage box into the reaction cylinder, without opening the cylinder lid, thus reducing the rate of heat loss. Attached Figure Description

[0030] Figure 1 This is a perspective view of the present invention;

[0031] Figure 2 This is a schematic diagram of the reaction cylinder structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the cylinder cap structure of the present invention;

[0033] Figure 4 This is a schematic diagram of the motor structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the frame structure of the present invention;

[0035] Figure 6 This is a front sectional view of the reaction cylinder of the present invention;

[0036] Figure 7 This is a schematic diagram of the heat insulation arc plate structure of the present invention;

[0037] Figure 8 This is a schematic diagram of the second structure of the heat-conducting plate of the present invention;

[0038] Figure 9 This is a control flowchart of the present invention;

[0039] Figure 10 This is a flowchart illustrating the method of using the present invention.

[0040] In the diagram: 1. Base plate; 2. Support column; 3. Reaction cylinder; 4. Hand valve one; 5. Discharge pipe one; 6. Feed pipe one; 7. Hand valve two; 8. Feed hopper; 9. Cylinder cover; 10. Motor; 11. Rotating rod; 12. Stirring rod; 13. Frame; 14. Liquid storage box; 15. Discharge pipe two; 16. Solenoid valve one; 17. Conveying pipe one; 18. Heating rod; 19. Temperature sensing unit one; 20. Heat conducting plate one; 21. Heat exchange box; 22. Feed pipe two; 23. Pipe cover; 24. Pump one; 25. 26. Delivery pipe 2; 27. Delivery pipe 3; 28. Pump 2; 29. ​​Delivery pipe 4; 20. Delivery pipe 5; 31. Temperature sensing unit 2; 32. Hydraulic unit 1; 33. Connecting rod; 34. Heat insulation arc plate; 35. Hydraulic unit 2; 36. Heat conducting plate 2; 37. Heat conducting plate 3; 38. Insulation box; 39. Temperature sensing unit 3; 40. Hand valve 3; 41. Control unit; 42. Solenoid valve 2; 43. Transparent plate 1; 44. Transparent plate 2; 45. Acidity / alkalinity detector. Detailed Implementation

[0041] 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.

[0042] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] Please see Figure 1 , Figure 2 and Figure 6 One embodiment of the present invention is a highly efficient cyclization microreactor for ethyl pyrazolidine carboxylate.

[0045] The reaction vessel includes a base plate 1 and a feed pipe 6. A reaction cylinder 3 is mounted on the top of the base plate 1, and support columns 2 are symmetrically mounted on the bottom of the base plate 1. A hand valve 4 is mounted on the front output end of the reaction cylinder 3, and a discharge pipe 5 is mounted on the output end of the hand valve 4. A feed pipe 6 is mounted on the front input end of the reaction cylinder 3, and a hand valve 7 is mounted on the input end of the feed pipe 6. A feed hopper 8 is mounted on the input end of the hand valve 7. A heating rod 18 is installed inside the reaction cylinder 3, and the heating rod 18 is located below the rotating rod 11. The base plate 1 provides an installation position for the reaction cylinder 3, allowing it to be installed. The support columns 2 provide support for the base plate 1. The reaction cylinder 3 provides a reaction space for the reaction liquid. The outside of the reaction cylinder 3 is covered with insulation cotton for heat preservation. The hand valve 4 can control the passage of the liquid inside the reaction cylinder 3 into the discharge pipe 5. The discharge pipe 5 can provide a discharge path for the liquid inside the reaction cylinder 3. The feed pipe 6 can provide a transmission path for the liquid inside the feed hopper 8 to enter the reaction cylinder 3. The hand valve 7 can control the opening and closing of the channel between the feed hopper 8 and the feed pipe 6. The feed hopper 8 can easily receive external raw materials and prevent external raw materials from spilling. The heating rod 18 can convert electrical energy into heat energy, thereby heating the liquid inside the reaction cylinder 3.

[0046] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 One embodiment of the present invention is a highly efficient cyclization microreactor for ethyl pyrazolidine carboxylate.

[0047] The reaction vessel includes a stirring unit located at the top of the reaction vessel 3 for stirring materials. The stirring unit comprises a cover 9, a motor 10, a rotating rod 11, stirring rods 12, and a transparent plate 42. The cover 9 is installed on the top of the reaction vessel 3, and the motor 10 is mounted on the top of the cover 9. The rotating rod 11 is mounted on the output end of the motor 10, and multiple stirring rods 12 are symmetrically mounted on the outer side of the rotating rod 11. The transparent plate 42 is installed through the top of the cover 9, which can seal the top of the reaction vessel 3. The top of the cover 9 is covered with insulation cotton for heat preservation. The motor 10 can convert electrical energy into kinetic energy, thereby driving the rotating rod 11 to rotate. The rotation of the rotating rod 11 can drive the stirring rods 12 to rotate, and the rotation of the stirring rods 12 can stir the solution inside the reaction vessel 3. The transparent plate 42 allows people to easily observe the solution level inside the reaction vessel 3.

[0048] Please see Figure 1 , Figure 2 , Figure 5 and Figure 6 One embodiment of the present invention is a highly efficient cyclization microreactor for ethyl pyrazolidine carboxylate.

[0049] The system includes an pH unit, located at the top of the stirring unit, used to adjust the pH of the solution inside the reaction cylinder 3. The pH unit comprises a frame 13, a storage box 14, a second discharge pipe 15, a first solenoid valve 16, a first conveying pipe 17, and a pH meter 45. The frame 13 is mounted on top of the cylinder cover 9. The storage box 14 is symmetrically mounted on the top of the frame 13. The second discharge pipe 15 is installed at the bottom output end of the storage box 14, with one end of the second discharge pipe 15 penetrating the top inner wall of the frame 13. The first solenoid valve 16 is installed at the output end of the second discharge pipe 15, and the first conveying pipe 17 is installed at the output end of the first solenoid valve 16. The end of the cylinder cover 9 is inserted through the bottom, and the pH meter 45 is installed through one side of the reaction cylinder 3. The frame 13 provides an installation position for the liquid storage box 14. The two liquid storage boxes 14 can store acidic liquid and alkaline liquid respectively. The discharge pipe 2 15 provides a transmission path for the liquid inside the liquid storage box 14 to enter the solenoid valve 16. The solenoid valve 16 can control the connection between the discharge pipe 2 15 and the delivery pipe 17. The delivery pipe 17 provides a transmission path for the liquid in the solenoid valve 16 to be discharged into the reaction cylinder 3. The pH meter 45 is used to detect the pH of the solution in the reaction cylinder 3 and transmit the information to the control unit 40.

[0050] Please see Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 One embodiment of the present invention is a highly efficient cyclization microreactor for ethyl pyrazolidine carboxylate.

[0051] The reaction vessel includes a heat exchange unit located on one side of the reaction cylinder 3. This unit recovers the temperature of the solution inside the reaction cylinder 3, reducing heat loss. The heat exchange unit includes a temperature sensing unit 19, a heat-conducting plate 20, a heat exchange box 21, a feed pipe 22, a pipe cover 23, a pump 24, a conveying pipe 25, a conveying pipe 26, a temperature sensing unit 30, a hydraulic unit 31, a connecting rod 32, a heat-insulating arc plate 33, and a transparent plate 43. The temperature sensing unit 19 is installed through one side of the reaction cylinder 3. Multiple heat-conducting plates 20 are installed on the inner wall of one side of the reaction cylinder 3, located below the rotating rod 11. The heat exchange box 21 is installed on one side of the reaction cylinder 3, and a feed valve is installed on the top of the heat exchange box 21. Pipe 22, with a detachable cover 23 installed on its outer side; Pump 1 24 installed on top of cylinder cover 9; Conveying pipe 25 installed at the input end of pump 1 24, one end of conveying pipe 25 penetrating the bottom of cylinder cover 9; Conveying pipe 3 26 installed at the output end of pump 1 24, the output end of conveying pipe 3 26 connected to the input end of heat exchange box 21; Temperature sensing unit 2 30 is installed through the front of heat exchange box 21; Hydraulic unit 1 31 is symmetrically installed on the top of heat exchange box 21; Connecting rod 32 is installed at the output end of hydraulic unit 1 31; Heat insulation arc plate 33 is installed on one side of connecting rod 32, and the bottom of heat insulation arc plate 33 penetrates the top inner wall of heat exchange box 21; A heat insulation arc plate 33 is installed through the top of heat exchange box 21. The transparent plate 43 and temperature sensing unit 19 are temperature sensors that can measure the temperature of the solution inside the reaction cylinder 3. The heat-conducting plate 20 increases the heat transfer contact area with the solution in the reaction cylinder 3, thereby accelerating the transfer of heat from the solution inside the reaction cylinder 3 to the inner wall of the reaction cylinder 3. The heat exchange box 21 can store the raw materials for the next reaction. The outside of the heat exchange box 21 is insulated with heat-insulating cotton. The feed pipe 22 provides an entry path for external raw materials to enter the heat exchange box 21. The pipe cover 23 can seal the feed pipe 22. The pump 24 can convert electrical energy into kinetic energy, thereby drawing the raw materials inside the heat exchange box 21 into the reaction cylinder 3. The conveying pipe 25 can carry the raw materials inside the pump 24. The material entering the reaction chamber 3 is provided with a transmission path. The conveying pipe 26 provides a transmission path for the material inside the heat exchange box 21 to enter the pump 24. The temperature sensing unit 30 is a temperature sensor that can detect the temperature of the material inside the heat exchange box 21 and transmit the temperature information to the control unit 40. The hydraulic unit 31 is a hydraulic cylinder that can convert hydraulic energy into kinetic energy, thereby driving the connecting rod 32 to move up and down. The connecting rod 32 can drive the heat insulation arc plate 33 to move up and down by moving up and down. The heat insulation arc plate 33 plays a role in heat insulation, which can reduce the heat transferred from the reaction chamber 3 to the material inside the heat exchange box 21. The transparent plate 43 allows people to easily observe the liquid level of the material inside the heat exchange box 21.

[0052] Please see Figure 1 , Figure 2 , Figure 6 and Figure 8 One embodiment of the present invention is a highly efficient cyclization microreactor for ethyl pyrazolidine carboxylate.

[0053] The heat exchange unit includes a heat-conducting unit located on one side of the heat exchange unit. This unit accelerates the heat exchange between the solution inside the reaction chamber 3 and the heat exchange unit. The heat-conducting unit includes a second hydraulic unit 34, a second heat-conducting plate 35, and a third heat-conducting plate 36. Two second hydraulic units 34 are symmetrically installed on one side of the heat exchange chamber 21. The output end of the second hydraulic unit 34 is equipped with a second heat-conducting plate 35. Multiple third heat-conducting plates 36 are installed on one side of the second heat-conducting plate 35. The second hydraulic unit 34 is a hydraulic cylinder that can convert hydraulic energy into kinetic energy, thereby driving the second heat-conducting plate 35 to move left and right. The second heat-conducting plate 35 has an arc-shaped structure. By moving and contacting the reaction chamber 3, it can transfer the heat from the reaction chamber 3 to the third heat-conducting plate 36. The third heat-conducting plate 36 can transfer the heat from the second heat-conducting plate 35 to the raw material inside the heat exchange chamber 21, increasing the heat conduction area of ​​the solution inside the heat exchange chamber 21 and increasing the heat conduction rate.

[0054] Please see Figure 1 and Figure 2 One embodiment of the present invention is a highly efficient cyclization microreactor for ethyl pyrazolidine carboxylate.

[0055] The system includes a heat preservation unit for storing the solution inside the reaction chamber 3, allowing for further temperature reuse of the solution. The heat preservation unit comprises a heat preservation box 37, a temperature sensing unit 38, a manual valve 39, a pump 27, a delivery pipe 48, a solenoid valve 21, a delivery pipe 5 29, and a transparent plate 344. The heat preservation box 37 is installed on one side of the heat exchange box 21. The temperature sensing unit 38 is installed through the front of the heat preservation box 37. A manual valve 39 is installed at the output end of one side of the heat preservation box 37. The pump 27 is installed on the top of the base plate 1. A delivery pipe 48 is installed at the input end of the pump 27, connecting to the output end of the reaction chamber 3. A solenoid valve 21 is installed at the output end of the pump 27, and a delivery pipe 5 29 is installed at the output end of the solenoid valve 21, with the output end of the delivery pipe 5 29 connected to the input end of the heat preservation box 37. A transparent plate 344 is installed through the top of the insulated box 37. The insulated box 37 can store the solution discharged from the reaction cylinder 3. The outside of the insulated box 37 is covered with insulation cotton. The temperature sensing unit 38 is a temperature sensor that can detect the temperature of the solution inside the insulated box 37. The hand valve 39 controls the discharge of the solution inside the insulated box 37. The pump 27 can draw the solution inside the reaction cylinder 3 into the insulated box 37. The delivery pipe 48 can provide a transmission path for the liquid inside the reaction cylinder 3 to be transferred into the pump 27. The solenoid valve 241 controls the opening and closing of the path between the liquid inside the pump 27 and the delivery pipe 529. The delivery pipe 529 can provide a transmission path for the liquid inside the pump 27 to be transferred into the insulated box 37. The transparent plate 344 can provide an observation path for people to observe the liquid level height inside the insulated box 37.

[0056] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 and Figure 8 One embodiment of the present invention is a highly efficient cyclization microreactor for ethyl pyrazolidine carboxylate.

[0057] The system includes a control unit 40, which is mounted on the top of the base plate 1. The control unit 40 is connected to the motor 10, solenoid valve 16, heating rod 18, temperature sensing unit 19, pump 24, pump 27, temperature sensing unit 30, hydraulic unit 31, hydraulic unit 34, temperature sensing unit 38, and pH meter 45. The control unit 40 is a controller that can receive signals from temperature sensing unit 19, temperature sensing unit 30, temperature sensing unit 38, and pH meter 45, and can control the motor 10, solenoid valve 16, heating rod 18, pump 24, pump 27, hydraulic unit 31, and hydraulic unit 34.

[0058] The method of using the high-efficiency cyclization microreactor for ethyl pyrazolidine carboxylate is as follows:

[0059] S1. First, open the hand valve 2 7 and add the raw material from the feed hopper 8 into the reaction cylinder 3. Then, turn on the heating rod 18 to heat the solution inside the reaction cylinder 3. The temperature of the solution inside the reaction cylinder 3 is detected by the temperature sensing unit 19 and the temperature information is transmitted to the control unit 40. After the temperature reaches the set temperature, the control unit 40 controls the heating rod 18 to stop heating. Then, the motor 10 is started to drive the stirring rod 12 to stir the solution inside the reaction cylinder 3, thereby accelerating the reaction speed of the solution.

[0060] S2. Add the acidic and alkaline conditioning solutions to the two storage boxes 14 respectively, and then adjust the acidity or alkalinity of the solution inside the reaction cylinder 3 by alternately controlling the opening of the two solenoid valves 16.

[0061] S3. After the solution reaction inside the reaction cylinder 3 is completed, another raw material is added to the heat exchange box 21. Then, the hydraulic unit 1 31 is activated to control the heat insulation arc plate 33 to move upward, so that the temperature of the solution inside the reaction cylinder 3 can be transferred to the raw material in the heat exchange box 21 through the reaction cylinder 3, so that the heat of the solution in the reaction cylinder 3 can be recovered and reused. When the temperature in the reaction cylinder 3 measured by the temperature sensing unit 1 19 is the same as the temperature in the heat exchange box 21 measured by the temperature sensing unit 2 30, the control unit 40 controls the pump 2 27 to draw the raw material in the reaction cylinder 3 into the heat preservation box 37.

[0062] S4. After the raw materials in the reaction cylinder 3 are discharged, the raw materials in the heat exchange box 21 are drawn into the reaction cylinder 3 by starting the pump 24. Then, the raw materials are heated by the heating rod 18, and the motor 10 drives the stirring rod 12 to stir the raw materials so that they react quickly.

[0063] S3 also includes the following steps:

[0064] S31. After the heat insulation arc plate 33 moves upward, the hydraulic unit 2 34 is activated to drive the heat conduction plate 2 35 to move towards the reaction cylinder 3, and make the heat conduction plate 2 35 contact the reaction cylinder 3, so that the heat of the reaction cylinder 3 is transferred to the heat conduction plate 2 35 and the heat conduction plate 36, increasing the heat conduction area, so that the heat of the solution inside the reaction cylinder 3 can be transferred to the raw material in the heat exchange box 21 more quickly.

[0065] Working Principle: Before using the high-efficiency cyclization microreactor for ethyl pyrazolidine carboxylate, it should be checked for any issues affecting its use. First, open hand valve 7 and add the raw material from feed hopper 8 into reaction cylinder 3. Then, turn on heating rod 18 to heat the solution inside reaction cylinder 3. The temperature of the solution inside reaction cylinder 3 is detected by temperature sensing unit 19 and transmitted to control unit 40. After the temperature reaches the set temperature, control unit 40 controls heating rod 18 to stop heating. Then, start motor 10 to drive stirring rod 12 to stir the solution inside reaction cylinder 3, accelerating the reaction speed. Add acidic and alkaline conditioning solutions to two storage boxes 14 respectively. Then, by alternately controlling the opening of two solenoid valves 16, the liquid in the two storage boxes 14 flows into reaction cylinder 3 to adjust the acidity or alkalinity of the solution inside reaction cylinder 3. After the reaction in reaction cylinder 3 is complete, add other raw materials to heat exchange box 21, and then start hydraulic unit. Hydraulic unit 31 controls the upward movement of the heat-insulating arc plate 33, allowing the solution temperature inside the reaction cylinder 3 to be transferred to the raw material in the heat exchange box 21. This enables the heat of the solution in the reaction cylinder 3 to be recovered and reused. After the heat-insulating arc plate 33 moves upward, hydraulic unit 34 is activated to move the heat-conducting plate 35 towards the reaction cylinder 3, bringing it into contact with the reaction cylinder 3. This allows the heat of the reaction cylinder 3 to be transferred to the heat-conducting plates 35 and 36, increasing the heat conduction area and enabling the heat of the solution inside the reaction cylinder 3 to be recovered and reused. To facilitate faster transfer of raw materials to the heat exchanger 21, when the temperature in the reaction chamber 3 measured by temperature sensing unit 19 is the same as the temperature in the heat exchanger 21 measured by temperature sensing unit 20, the control unit 40 controls pump 27 to draw the raw materials in the reaction chamber 3 into the insulation box 37. After the raw materials in the reaction chamber 3 are discharged, pump 24 is started to draw the raw materials in the heat exchanger 21 into the reaction chamber 3. Then, the raw materials are heated by heating rod 18, and motor 10 drives stirring rod 12 to stir the raw materials to make them react quickly.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the rights involved.

Claims

1. A highly efficient cyclization microreactor for ethyl pyrazolidine carboxylate, characterized in that: It includes a base plate (1), a stirring unit, an acid-base unit, a heat exchange unit, a heat conduction unit, and a heat preservation unit. A reaction cylinder (3) is installed on the top of the base plate (1). The stirring unit is located on the top of the reaction cylinder (3) and is used to stir the materials. The acid-base unit is located on the top of the stirring unit and is used to adjust the acid-base of the solution inside the reaction cylinder (3). The heat exchange unit is located on one side of the reaction cylinder (3) and is used to recover the temperature of the solution inside the reaction cylinder (3) and reduce heat loss. The heat-conducting unit is located on one side of the heat exchange unit to accelerate the heat exchange rate between the solution inside the reaction cylinder (3) and the heat exchange unit. The heat-insulating unit is used to store the solution inside the reaction cylinder (3) and can further reuse the temperature of the solution in the reaction cylinder (3). The heat exchange unit includes a temperature sensing unit (19), a heat-conducting plate (20), a heat exchange box (21), a feed pipe (22), a pipe cover (23), a pump (24), a delivery pipe (25), a delivery pipe (26), a temperature sensing unit (30), a hydraulic unit (31), a connecting rod (32), a heat-insulating arc plate (33), and a transparent plate (43). The temperature sensing unit (19) is installed through one side of the reaction cylinder (3). Multiple heat-conducting plates (20) are installed on the inner wall of one side of the reaction cylinder (3), and the heat-conducting plates (20) are located below the rotating rod (11). The heat exchange box (21) is installed on one side of the reaction cylinder (3). The feed pipe (22) is installed on the top of the heat exchange box (21), and the pipe cover (23) is detachably installed on the outside of the feed pipe (22). Pump 1 (24) is installed on the top of the cylinder cover (9). Pump 1 (24) has a delivery pipe 2 (25) installed at its input end. One end of the delivery pipe 2 (25) passes through the bottom of the cylinder cover (9). Pump 1 (24) has a delivery pipe 3 (26) installed at its output end. The output end of the delivery pipe 3 (26) is connected to the input end of the heat exchange box (21). Temperature sensing unit 2 (30) is installed through the front of the heat exchange box (21). Hydraulic unit 1 (31) is symmetrically installed on the top of the heat exchange box (21). Connecting rod (32) is installed at the output end of hydraulic unit 1 (31). Heat insulation arc plate (33) is installed on one side of the connecting rod (32). The bottom of the heat insulation arc plate (33) passes through the top inner wall of the heat exchange box (21). Transparent plate 2 (43) is installed through the top of the heat exchange box (21). The heat-conducting unit includes a second hydraulic unit (34), a second heat-conducting plate (35), and a third heat-conducting plate (36). Two second hydraulic units (34) are symmetrically installed on one side of the heat exchange box (21). The output end of the second hydraulic unit (34) is equipped with a second heat-conducting plate (35), and a plurality of third heat-conducting plates (36) are installed on one side of the second heat-conducting plate (35). The insulation unit includes an insulation box (37), a temperature sensing unit three (38), a manual valve three (39), a pump two (27), a delivery pipe four (28), a solenoid valve two (41), a delivery pipe five (29), and a transparent plate three (44). The insulation box (37) is installed on one side of the heat exchange box (21). The temperature sensing unit three (38) is installed through the front of the insulation box (37). The manual valve three (39) is installed at the output end on one side of the insulation box (37). The pump two (27) is installed... Installed on the top of the base plate (1), the input end of the pump two (27) is equipped with a delivery pipe four (28), the input end of the delivery pipe four (28) is connected to the output end of the reaction cylinder (3), the output end of the pump two (27) is equipped with a solenoid valve two (41), the output end of the solenoid valve two (41) is equipped with a delivery pipe five (29), and the output end of the delivery pipe five (29) is connected to the input end of the heat preservation box (37). The top of the heat preservation box (37) is equipped with a transparent plate three (44).

2. The high-efficiency cyclization microreactor for ethyl pyrazolidine carboxylate according to claim 1, characterized in that: Support columns (2) are symmetrically installed at the bottom of the base plate (1). A hand valve (4) is installed at the output end of the front of the reaction cylinder (3). A discharge pipe (5) is installed at the output end of the hand valve (4). A feed pipe (6) is installed at the input end of the front of the reaction cylinder (3). A hand valve (7) is installed at the input end of the feed pipe (6). A feed hopper (8) is installed at the input end of the hand valve (7). A heating rod (18) is installed inside the reaction cylinder (3), and the heating rod (18) is located below the rotating rod (11).

3. The high-efficiency cyclization microreactor for ethyl pyrazolidine carboxylate according to claim 2, characterized in that: The stirring unit includes a cylinder cover (9), a motor (10), a rotating rod (11), a stirring rod (12), and a transparent plate (42). The cylinder cover (9) is installed on the top of the reaction cylinder (3). The motor (10) is installed on the top of the cylinder cover (9). The rotating rod (11) is installed at the output end of the motor (10). Multiple stirring rods (12) are symmetrically installed on the outside of the rotating rod (11). The transparent plate (42) is installed through the top of the cylinder cover (9).

4. The high-efficiency cyclization microreactor for ethyl pyrazolidine carboxylate according to claim 3, characterized in that: The pH unit includes a frame (13), a storage box (14), a discharge pipe (15), a solenoid valve (16), a delivery pipe (17), and a pH meter (45). The frame (13) is installed on the top of the cylinder cover (9). The storage box (14) is symmetrically installed on the top of the frame (13). The discharge pipe (15) is installed at the bottom output end of the storage box (14). One end of the discharge pipe (15) penetrates the top inner wall of the frame (13). The solenoid valve (16) is installed at the output end of the discharge pipe (15). The delivery pipe (17) is installed at the output end of the solenoid valve (16). One end of the delivery pipe (17) penetrates the bottom of the cylinder cover (9). The pH meter (45) is installed through one side of the reaction cylinder (3).

5. The high-efficiency cyclization microreactor for ethyl pyrazolidine carboxylate according to claim 4, characterized in that: The top of the base plate (1) is equipped with a control unit (40), which is electrically connected to the motor (10), solenoid valve one (16), heating rod (18), temperature sensing unit one (19), pump one (24), pump two (27), temperature sensing unit two (30), hydraulic unit one (31), hydraulic unit two (34), temperature sensing unit three (38) and pH meter (45).

6. A method of using the high-efficiency cyclization microreactor for ethyl pyrazolidine carboxylate according to any one of claims 1-5, characterized in that: The method of using the high-efficiency cyclization microreactor for ethyl pyrazolidine carboxylate is as follows: S1. First, open the second hand valve (7) and add the raw material from the feed hopper (8) into the reaction cylinder (3). Then, turn on the heating rod (18) to heat the solution inside the reaction cylinder (3). The temperature of the solution inside the reaction cylinder (3) is detected by the temperature sensing unit (19) and the temperature information is transmitted to the control unit (40). After the temperature reaches the set temperature, the control unit (40) controls the heating rod (18) to stop heating. Then, the motor (10) is started to drive the stirring rod (12) to stir the solution inside the reaction cylinder (3) to accelerate the reaction speed of the solution. S2. Add the acidic and alkaline conditioning solutions into the two storage boxes (14) respectively, and then adjust the acidity or alkalinity of the solution inside the reaction cylinder (3) by alternately controlling the opening of the two solenoid valves (16). S3. After the reaction of the solution inside the reaction cylinder (3) is completed, the other raw materials are added to the heat exchange box (21). Then, the heat insulation arc plate (33) is moved upward by starting the hydraulic unit (31), so that the temperature of the solution inside the reaction cylinder (3) can be transferred to the raw materials in the heat exchange box (21) through the reaction cylinder (3), so that the heat of the solution in the reaction cylinder (3) can be recovered and reused. When the temperature in the reaction cylinder (3) measured by the temperature sensing unit (19) is the same as the temperature in the heat exchange box (21) measured by the temperature sensing unit (20), the control unit (40) controls the pump (27) to draw the raw materials in the reaction cylinder (3) into the heat preservation box (37). S4. After the raw materials in the reaction cylinder (3) are discharged, the raw materials in the heat exchange box (21) are drawn into the reaction cylinder (3) by starting the pump (24). Then the raw materials are heated by the heating rod (18), and the motor (10) drives the stirring rod (12) to stir the raw materials so that they react quickly.

7. The method of using the high-efficiency cyclization microreactor for ethyl pyrazolidine carboxylate according to claim 6, characterized in that: The S3 process also includes the following steps: S31. After the heat insulation arc plate (33) moves upward, the second hydraulic unit (34) drives the second heat-conducting plate (35) to move towards the reaction cylinder (3) and makes the second heat-conducting plate (35) contact the reaction cylinder (3), so that the heat of the reaction cylinder (3) is transferred to the second heat-conducting plate (35) and the third heat-conducting plate (36), increasing the heat conduction area, so that the heat of the solution inside the reaction cylinder (3) can be transferred to the raw material in the heat exchange box (21) more quickly.

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