Separation and purification device for preparing methyl methacrylate by cracking waste plastics
By using a stirring mechanism to agitate the solution in the separation and purification device, the problems of low purification efficiency and poor separation effect caused by uneven solution temperature are solved, thus achieving efficient purification and high-purity separation of methyl methacrylate.
Patent Information
- Application Number
- CN202520689577.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-04-17
- Estimated Expiration
- 2035-04-11
AI Technical Summary
In existing separation and purification devices, uneven solution temperature during the distillation of methyl methacrylate leads to low purification efficiency and poor separation effect, affecting the purity of methyl methacrylate.
A stirring mechanism is used to stir the solution containing methyl methacrylate, so that the solution is heated evenly. The mechanism includes a combination design of a rotating shaft, a partition plate, a rotating ring, a gear, an internal gear ring, a rotating rod, and stirring blades. The uniform heating of the solution is achieved by the reciprocating motion of the stirring blades.
This improved the purification efficiency and separation effect of methyl methacrylate, avoiding any impact on the purity of methyl methacrylate.
Smart Images
Figure CN224126577U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of methyl methacrylate preparation technology, specifically to a separation and purification device for preparing methyl methacrylate from waste plastic pyrolysis. Background Technology
[0002] Waste plastics refer to plastic products discarded in production and daily life. In order to recycle and utilize resources, pyrolysis process is usually used to prepare methyl methacrylate from waste plastics. In order to improve the purity of the obtained methyl methacrylate, separation and purification equipment is usually used to purify the methyl methacrylate-containing solution obtained from the pyrolysis of waste plastics through purification processes (distillation, extraction, crystallization, etc.).
[0003] In existing separation and purification equipment, when purifying methyl methacrylate by distillation, the operator usually adds a mixture of an appropriate amount of polymerization inhibitor and a solution containing methyl methacrylate into the purification tank, and then uses the difference in boiling points between methyl methacrylate and impurities to heat the solution and distill out the methyl methacrylate.
[0004] Existing separation and purification devices have the following problems: during the distillation and purification of methyl methacrylate, the internal temperature of the methyl methacrylate-containing solution may be unevenly distributed, resulting in low purification efficiency of methyl methacrylate and poor separation effect, which affects the purity of methyl methacrylate. To address this, we propose a separation and purification device for preparing methyl methacrylate from waste plastic pyrolysis. Utility Model Content
[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a separation and purification device for preparing methyl methacrylate by pyrolysis of waste plastics. During the distillation and purification process, the solution containing methyl methacrylate is stirred by a stirring mechanism, so that the solution can be heated evenly, which improves the purification efficiency of methyl methacrylate, has a good separation effect, and avoids affecting the purity of methyl methacrylate. This can effectively solve the problems in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a separation and purification device for preparing methyl methacrylate by pyrolysis of waste plastics, comprising a purification tank and a stirring mechanism;
[0007] The stirring mechanism includes a rotating shaft, a partition plate, a rotating ring, gears, an internal gear ring, a rotating rod, and stirring blades. The top wall of the purification tank is rotatably connected to the rotating shaft, and the lower end of the rotating shaft is equipped with a partition plate. The upper surface of the partition plate has evenly distributed slots, and rotating rings are rotatably connected inside each slot. Gears are fixedly fitted onto the outer surface of each rotating ring. The top wall of the purification tank is equipped with an internal gear ring, and four gears mesh with one internal gear ring. The upper surface of each rotating ring has a sliding opening, and a rotating rod is slidably connected inside each sliding opening. Stirring blades are evenly distributed at the lower end of the outer surface of the rotating rod. During the distillation and purification process, the stirring mechanism stirs the solution containing methyl methacrylate, allowing the solution to be heated evenly, improving the purification efficiency of methyl methacrylate, resulting in good separation, and avoiding any impact on the purity of methyl methacrylate.
[0008] Furthermore, it also includes a microcontroller, which is located outside the purification tank. The input terminal of the microcontroller is electrically connected to an external power supply to facilitate the normal operation of the control device.
[0009] Furthermore, a motor is provided on the upper surface of the purification tank. The lower end of the motor's output shaft is fixedly connected to the upper end of the rotating shaft, and the input end of the motor is electrically connected to the output end of the microcontroller to provide driving force.
[0010] Furthermore, the stirring mechanism also includes a limiting component, which includes rib grooves and ribs. The inner wall of the sliding port is provided with symmetrically distributed rib grooves, and the upper end of the outer surface of the rotating rod is provided with symmetrically distributed ribs. The ribs are slidably connected to the interior of adjacent rib grooves to facilitate limiting.
[0011] Furthermore, the stirring mechanism also includes a guide assembly, which includes a spherical protrusion, a wavy protrusion, a limiting ring, and a spring. The upper end of the rotating rod is provided with a spherical protrusion, the top wall of the purification tank is provided with a wavy protrusion, the upper end of the outer surface of the rotating rod is fixedly fitted with a limiting ring, and the outer surface of the rotating rod is movably fitted with a spring. The springs are all located between the lower surface of the limiting ring and the upper surface of the rotating ring on the same side, which facilitates the guiding and limiting function.
[0012] Furthermore, the purification tank has a heating chamber on its side wall, and an electric heating wire is installed inside the heating chamber. The input end of the electric heating wire is electrically connected to the output end of the microcontroller to facilitate heating of the solution.
[0013] Furthermore, a condensing pipe is provided at the exhaust port of the purification barrel, and a cooling box is provided on the right side of the purification barrel. The middle part of the condensing pipe is located inside the cooling box, and the condensing pipe inside the cooling box is S-shaped to facilitate the condensation of the distilled gas into liquid.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This separation and purification device for preparing methyl methacrylate from waste plastic pyrolysis has the following advantages:
[0015] During the distillation and purification process, the rotating shaft drives the isolation plate to rotate. Due to the presence of gears and internal gear rings, the isolation plate drives the rotating ring to rotate around the rotating shaft while the rotating ring rotates on its own axis. The rotation of the rotating ring drives the stirring blades to rotate through the rotating rod, stirring the solution containing methyl methacrylate. Through the combined action of spherical protrusions, wavy protrusions, limiting rings, and springs, the stirring blades make up-and-down reciprocating motions while rotating, providing an up-and-down shear force to the solution as the stirring blades rotate, so that the solution can be heated evenly, improving the purification efficiency of methyl methacrylate, resulting in good separation effect, and avoiding affecting the purity of methyl methacrylate. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0018] Figure 3 This is an enlarged structural schematic diagram of point A of this utility model;
[0019] Figure 4 This is a schematic diagram of the wave-shaped protrusion of this utility model.
[0020] In the diagram: 1 Purification tank, 2 Microcontroller, 3 Stirring mechanism, 31 Rotating shaft, 32 Isolation plate, 33 Rotating ring, 34 Gear, 35 Internal gear ring, 36 Rotating rod, 37 Stirring blade, 38 Limiting component, 381 Rib groove, 382 Rib, 39 Guide component, 391 Spherical protrusion, 392 Wave protrusion, 393 Limiting ring, 394 Spring, 4 Motor, 5 Electric heating wire, 6 Cooling box, 7 Condensation pipe. Detailed Implementation
[0021] 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.
[0022] Please see Figure 1-4This embodiment provides a technical solution: a separation and purification device for preparing methyl methacrylate from waste plastic pyrolysis, including a purification tank 1 and a stirring mechanism 3, and a single-chip microcomputer 2. The single-chip microcomputer 2 is located outside the purification tank 1, and its input terminal is electrically connected to an external power source. A heating chamber is provided on the side wall of the purification tank 1, and an electric heating wire 5 is provided inside the heating chamber. The input terminal of the electric heating wire 5 is electrically connected to the output terminal of the single-chip microcomputer 2. A condensation pipe 7 is provided at the exhaust port of the purification tank 1, and a cooling box 6 is provided on the right side of the purification tank 1. The middle part of the condensation pipe 7 is located inside the cooling box 6, and the condensation pipe 7 inside the cooling box 6 is S-shaped. The operator opens the feed valve and then adds an appropriate amount of polymerization inhibitor (such as hydroquinone, etc., to prevent methyl methacrylate from reacting). A mixture of a polymer (polymerization reaction) and a solution containing methyl methacrylate is added to purification tank 1. Then, the feed valve is closed, and the microcontroller 2 is operated to turn on the electric heating wire 5. The heat generated by the electric heating wire 5 is transferred to the solution inside purification tank 1 through the inner wall of purification tank 1, causing the temperature of the solution to rise until it reaches the boiling point of methyl methacrylate. Methyl methacrylate evaporates into a gaseous state, and the gas flows into the condenser pipe 7 for condensation. When the gas passes through the condenser pipe 7 located in the cooling box 6, the gas exchanges heat with the cooling liquid in the cooling box 6 through the pipe wall of the condenser pipe 7. Finally, the gas condenses into a liquid and flows out from the condenser pipe 7 for collection. After the distillation of methyl methacrylate is completed, the drain valve at the drain port on the lower surface of purification tank 1 is opened to discharge the impurities from purification tank 1.
[0023] Stirring mechanism 3: It includes a rotating shaft 31, a partition plate 32, a rotating ring 33, a gear 34, an internal gear ring 35, a rotating rod 36, and a stirring blade 37. (The central axes of the rotating shaft 31, the partition plate 32, and the internal gear ring 35 are all coincident, and the central axes of the rotating ring 33 and the rotating rod 36 are coincident.) The top wall of the purification tank 1 is rotatably connected to the rotating shaft 31. The lower end of the rotating shaft 31 is provided with a partition plate 32. The upper surface of the partition plate 32 has evenly distributed slots. The interior of each slot is rotatably connected to a rotating ring 33. The outer surface of each rotating ring 33 is fixedly fitted with a gear 34. The top wall of the purification tank 1 is provided with an internal gear ring 35. Each of the four gears 34 is meshed with an internal gear ring 35. The upper surface of each rotating ring 33 has a sliding opening. The interior of each sliding opening is slidably connected to a rotating blade. The rotating rod 36 has uniformly distributed stirring blades 37 on its lower outer surface. A motor 4 is mounted on the upper surface of the purification tank 1. The lower end of the output shaft of the motor 4 is fixedly connected to the upper end of the rotating shaft 31. The input end of the motor 4 is electrically connected to the output end of the microcontroller 2. The stirring mechanism 3 also includes a limiting component 38, which includes rib grooves 381 and ribs 382. Symmetrically distributed rib grooves 381 are formed on the inner wall of the sliding opening. Symmetrically distributed ribs 382 are formed on the upper outer surface of the rotating rod 36. The ribs 382 are slidably connected to the interior of adjacent rib grooves 381. The stirring mechanism 3 also includes a guide component 39, which includes spherical protrusions 391, wave protrusions 392, a limiting ring 393, and a spring 394. (The rotating shaft 31 and the wave protrusions...) The central axes of the protrusions 392 coincide. The upper end of each rotating rod 36 is provided with a spherical protrusion 391. The top wall of the purification tank 1 is provided with a wavy protrusion 392. A limiting ring 393 is fixedly fitted onto the upper end of the outer surface of each rotating rod 36. A spring 394 is movably fitted onto the outer surface of each rotating rod 36. The springs 394 are located between the lower surface of the limiting ring 393 and the upper surface of the rotating ring 33 on the same side. During the distillation and purification process, the motor 4 is turned on. The output shaft of the motor 4 drives the isolation plate 32 to rotate via the rotating shaft 31. Due to the presence of the gear 34 and the internal gear ring 35, the isolation plate 32 drives the rotating ring 33 to rotate around the rotating shaft 31 while the rotating ring 33 rotates on its own axis. Due to the presence of the rib groove 381 and the rib 382, the rotation of the rotating ring 33 is carried by the rotating rod 36. The stirring blade 37 rotates around the rotating rod 36, stirring the solution. When the rotating rod 36 rotates around the rotating shaft 31, the spherical protrusion 391 moves from the recess of the wavy protrusion 392 to the protrusion of the wavy protrusion 392. The wavy protrusion 392, through the spherical protrusion 391 and the rotating rod 36, drives the stirring blade 37 to move downward. At this time, the limiting ring 393 compresses the spring 394. When the spherical protrusion 391 moves from the protrusion of the wavy protrusion 392 to the recess of the wavy protrusion 392, the spring 394, under the action of the rebound force, pushes the rotating rod 36 upward through the limiting ring 393, so that the outer surface of the spherical protrusion 391 is always in contact with the lower surface of the wavy protrusion 392. At this time, the stirring blade 37 moves upward.This causes the stirring blades 37 to reciprocate up and down while rotating, providing a vertical shear force to the solution as it rotates, resulting in more uniform heating of the solution.
[0024] The working principle of the separation and purification device for preparing methyl methacrylate from waste plastic pyrolysis provided by this utility model is as follows: The operator opens the feed valve, then adds a mixture of an appropriate amount of polymerization inhibitor (such as hydroquinone, used to prevent the polymerization reaction of methyl methacrylate) and a solution containing methyl methacrylate into the purification tank 1. Then, the feed valve is closed, and the microcontroller 2 is operated to turn on the electric heating wire 5. The heat generated by the electric heating wire 5 is transferred through the inner wall of the purification tank 1 to the solution inside the tank 1, causing the temperature of the solution to rise until it reaches the boiling point of methyl methacrylate. Methyl methacrylate evaporates into a gaseous state, which flows into the condenser pipe 7 for condensation. As the gas passes through the condenser pipe 7 located inside the cooling chamber 6, it exchanges heat with the coolant in the cooling chamber 6 through the pipe wall. Finally, the gas condenses into a liquid and flows out of the condenser pipe 7 for collection. After the distillation of methyl methacrylate is complete, the drain valve at the drain port on the lower surface of the purification tank 1 is opened to discharge impurities from the purification tank 1. During the distillation and purification process, the motor 4 is turned on. The output shaft of the motor 4 drives the isolation plate 32 to rotate via the rotating shaft 31. Due to the gear 34 and the internal gear ring 3... With the presence of 5, the isolation plate 32 drives the rotating ring 33 to rotate around the rotating shaft 31, while the rotating ring 33 rotates on its own axis. Due to the presence of the rib groove 381 and rib 382, the rotation of the rotating ring 33 drives the stirring blade 37 to rotate around the rotating rod 36 via the rotating rod 36. The stirring blade 37 stirs the solution. When the rotating rod 36 rotates around the rotating shaft 31, when the spherical protrusion 391 moves from the concave part of the wavy protrusion 392 to the protruding part of the wavy protrusion 392, the wavy protrusion 392 drives the stirring blade 37 through the spherical protrusion 391 and the rotating rod 36. As the ball moves downward, the limiting ring 393 compresses the spring 394. When the spherical protrusion 391 moves from the protrusion of the wavy protrusion 392 to the concave part of the wavy protrusion 392, the spring 394, under the action of the rebound force, pushes the rotating rod 36 upward through the limiting ring 393, so that the outer surface of the spherical protrusion 391 is always in contact with the lower surface of the wavy protrusion 392. At this time, the stirring blade 37 moves upward, causing the stirring blade 37 to make up-down reciprocating motion while rotating, providing an up-down shear force to the solution as the stirring blade 37 rotates, making the solution heat more evenly.
[0025] It is worth noting that the microcontroller 2 disclosed in the above embodiments can be an EFR32MG21, the motor 4 can be a YVP132S-4, and the microcontroller 2 controls the operation of the motor 4 and the electric heating wire 5 using methods commonly used in the prior art.
[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A separation and purification device for preparing methyl methacrylate from waste plastic cracking, characterized in that: It includes a purification tank (1) and a stirring mechanism (3); Stirring mechanism (3): It includes a rotating shaft (31), a partition plate (32), a rotating ring (33), a gear (34), an internal gear ring (35), a rotating rod (36), and stirring blades (37). The top wall of the purification tank (1) is rotatably connected to the rotating shaft (31). The lower end of the rotating shaft (31) is provided with a partition plate (32). The upper surface of the partition plate (32) is provided with evenly distributed slots. The inside of each slot is rotatably connected to a rotating ring (33). The outer surface of the rotating ring (33) is fixedly fitted with a gear (34). The top wall of the purification tank (1) is provided with an internal gear ring (35). All four gears (34) are meshed with an internal gear ring (35). The upper surface of the rotating ring (33) is provided with a sliding opening. The inside of each sliding opening is slidably connected to a rotating rod (36). The lower end of the outer surface of the rotating rod (36) is provided with evenly distributed stirring blades (37).
2. The separation and purification device for preparing methyl methacrylate from waste plastics by cracking according to claim 1, characterized in that: It also includes a microcontroller (2), which is located outside the purification tank (1), and the input terminal of the microcontroller (2) is electrically connected to an external power source.
3. The separation and purification device for preparing methyl methacrylate from waste plastics cracking according to claim 2, characterized in that: The upper surface of the purification barrel (1) is provided with a motor (4), the lower end of the output shaft of the motor (4) is fixedly connected to the upper end of the rotating shaft (31), and the input end of the motor (4) is electrically connected to the output end of the microcontroller (2).
4. The separation and purification device for preparing methyl methacrylate from waste plastics cracking according to claim 1, characterized in that: The stirring mechanism (3) further includes a limiting component (38), which includes a rib groove (381) and a rib (382). The inner wall of the sliding mouth is provided with symmetrically distributed rib grooves (381), and the upper end of the outer surface of the rotating rod (36) is provided with symmetrically distributed ribs (382). The ribs (382) are slidably connected to the interior of the adjacent rib grooves (381).
5. The separation and purification apparatus for preparing methyl methacrylate from waste plastic pyrolysis according to claim 1, characterized in that: The stirring mechanism (3) further includes a guide assembly (39), which includes a spherical protrusion (391), a wave protrusion (392), a limiting ring (393), and a spring (394). The upper end of the rotating rod (36) is provided with a spherical protrusion (391), the top wall of the purification tank (1) is provided with a wave protrusion (392), the upper end of the outer surface of the rotating rod (36) is fixedly fitted with a limiting ring (393), and the outer surface of the rotating rod (36) is movably fitted with a spring (394). The springs (394) are all located between the lower surface of the limiting ring (393) on the same side and the upper surface of the rotating ring (33).
6. The separation and purification device for preparing methyl methacrylate from waste plastics cracking according to claim 2, characterized in that: The purification barrel (1) has a heating chamber on its side wall, and an electric heating wire (5) is provided inside the heating chamber. The input end of the electric heating wire (5) is electrically connected to the output end of the microcontroller (2).
7. The separation and purification device for preparing methyl methacrylate from waste plastics cracking according to claim 1, characterized in that: The purification tank (1) is provided with a condensing pipe (7) at the exhaust port, and a cooling box (6) is provided on the right side of the purification tank (1). The middle part of the condensing pipe (7) is located inside the cooling box (6), and the condensing pipe (7) inside the cooling box (6) is S-shaped.