Polymerization apparatus for polyethylene glycol production and method of use thereof

Abstract

This invention discloses a polymerization reaction device for polyethylene glycol (PEG) production and its usage method, belonging to the field of chemical production technology. The device comprises a drive turntable, a stirring frame, transmission gears, a rotating sleeve, a piston cylinder, a return spring, and a movable slide column. The rotating sleeve rotates close to the surface of the reaction tank, driving the movable slide column to slide on the surface of the movable slide column until the movable slide column moves upward through the upper sliding groove of the sliding groove. This pushes the connecting end plate, causing the piston cylinder to slide upward inside the piston sleeve, drawing liquid from inside the reaction tank away from the piston sleeve. When the movable slide column moves downward through the lower sliding groove of the sliding groove, the return spring rebounds and presses down on the piston cylinder, squeezing the liquid drawn from inside the piston sleeve out through the through-hole. This creates turbulent and rolling motion of the liquid inside the reaction tank, increasing the contact area between the liquid and gas in the mixture and improving the efficiency of the mixing reaction of liquid and gaseous raw materials used in PEG production inside the reaction tank.

Description

Technical Field

[0001] This invention belongs to the field of chemical production technology, and in particular relates to a polymerization reaction equipment for the production of polyethylene glycol and its usage method. Background Technology

[0002] Polyethylene glycol (PEG), a linear water-soluble polymer formed by the stepwise addition polymerization of ethylene oxide with water or ethylene glycol, occupies an irreplaceable and important position in many fields such as pharmaceuticals, daily chemicals, food, materials, and agriculture due to its excellent properties such as good water solubility, biocompatibility, non-toxicity, lubricity, moisturizing properties, and chemical stability. The core of its production process lies in the addition polymerization reaction, which is usually carried out with ethylene glycol or water as the initiator and ethylene oxide as the polymerizing monomer under the action of a catalyst. The sufficiency of the polymerization reaction directly determines the product quality and production efficiency of PEG, while the mixing effect of raw materials and the pressure stability of the reaction system are key factors affecting the polymerization efficiency.

[0003] Existing polyethylene glycol (PEG) polymerization equipment typically relies on a single stirring device to mix the raw materials during the reaction process. This single stirring method makes it difficult to achieve sufficient contact between liquid and gaseous raw materials, resulting in poor mixing uniformity. The liquid often exists in large lumps or layers, limiting the contact area with the gas. This leads to a slow polymerization rate and low reaction efficiency, failing to meet the needs of large-scale production. Furthermore, the PEG polymerization process involves temperature increases and gas generation, causing pressure fluctuations inside the reaction tank. Sudden pressure increases can lead to safety hazards such as equipment vibration and seal leaks; conversely, sudden pressure drops can disrupt the stability of the reaction system, affecting the continuity of the polymerization reaction and the purity of the product. To address these issues, there is an urgent need for a new PEG polymerization equipment and its operating method. Summary of the Invention

[0004] The purpose of this invention is to address the problem that existing polyethylene glycol (PEG) polymerization equipment typically relies on a single stirring device to mix raw materials during the reaction process. This single stirring method makes it difficult to achieve sufficient contact between liquid and gaseous raw materials, resulting in poor mixing uniformity. Liquid materials often exist in large lumps or layers, limiting the contact area with the gas, leading to a slow polymerization rate and low reaction efficiency, which cannot meet the needs of large-scale production. Furthermore, the PEG polymerization process involves temperature increases and gas generation, causing pressure fluctuations inside the reaction tank. Sudden pressure increases can lead to safety hazards such as equipment vibration and seal leaks; while sudden pressure decreases can disrupt the stability of the reaction system, affecting the continuity of the polymerization reaction and the purity of the product. Therefore, this invention proposes a PEG polymerization equipment and its usage method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A polymerization reaction apparatus for producing polyethylene glycol and its method of use, comprising: a reaction tank, a driving mechanism at the bottom of the reaction tank, an electromagnetic discharge valve fixedly connected to the bottom of the outer surface of the reaction tank and communicating with the interior of the reaction tank, three stirring racks rotatably mounted inside the reaction tank via bearings, three piston backwash mechanisms fixedly mounted at equal angles on the inner wall of the reaction tank, a gasket fixedly connected at the center of the outer surface of the reaction tank, multiple rolling balls embedded in the inner wall of the gasket, a rotating sleeve tightly rotatably mounted on the top of the inner side of the displacement gasket, a pressure stabilizing mechanism fixedly connected to one side of the top of the reaction tank, a transmission mechanism provided on the side of the top of the reaction tank away from the pressure stabilizing mechanism, and a liquid inlet and a gas inlet connected between the pressure stabilizing mechanism and the transmission mechanism on the top of the reaction tank.

[0007] As a further description of the above technical solution:

[0008] The driving mechanism includes a drive motor, and a drive turntable is fixedly connected to the output end of the drive motor. A linkage bar is rotatably connected to the bottom edge of the drive turntable via a rotating shaft. A drive gear is rotatably mounted on the end of the linkage bar away from the drive turntable via a rotating shaft. The top of the drive gear is rotatably connected to the bottom of the reaction vessel via a bearing. Three driven gears are meshed at equal angles on the surface of the drive gear, and the top of the driven gear is fixedly connected to the bottom end of the stirring rack.

[0009] As a further description of the above technical solution:

[0010] The piston recoil mechanism includes a piston sleeve with multiple through holes at the bottom of its outer surface. A piston cylinder is slidably connected inside the piston sleeve. A fixed plate is fixedly connected at the center of the piston sleeve. Three connecting slide rods are fixedly connected to the bottom of the piston cylinder. The tops of the three connecting slide rods pass through the fixed plate and are fixedly connected to a connecting end plate. The connecting slide rods and the fixed plate are slidably connected. A return spring is sleeved on the surface of the connecting slide rod at the bottom of the fixed plate. A movable slide column is fixedly connected to one side of the connecting end plate.

[0011] As a further description of the above technical solution:

[0012] The inner wall of the rotating sleeve is provided with a movable sliding groove, and three movable sliding columns are slidably connected inside the movable sliding groove. The bottom of the outer surface of the rotating sleeve is provided with a limiting sliding groove, and the limiting sliding groove corresponds to the position of the ball. The ball is slidably connected inside the limiting sliding groove. A linkage toothed ring is fixedly connected to the top of the rotating sleeve.

[0013] As a further description of the above technical solution:

[0014] The transmission mechanism includes two support plates, which are fixed to the top of the reaction vessel. A rotating column is rotatably mounted between the two support plates via a bearing. A bevel gear is fixedly connected to the surface of the rotating column between the two support plates. A bevel gear is meshed with the bottom of the bevel gear and is fixedly connected to one of the stirring frames. One end of the rotating column passes through the support plate and is fixedly connected to a transmission gear, which meshes with the top of the linkage gear ring.

[0015] As a further description of the above technical solution:

[0016] The voltage stabilizing mechanism includes a voltage stabilizing box. A piston pressure plate is slidably connected to one side of the inside of the voltage stabilizing box. An mounting plate is fixedly connected to the center of the inside of the voltage stabilizing box. Four voltage stabilizing slide rods are fixedly connected to the side of the piston pressure plate near the mounting plate, and the voltage stabilizing slide rods are slidably connected to the mounting plate through the plate. A connecting ring is fixedly connected to the end of the four voltage stabilizing slide rods away from the piston pressure plate through the mounting plate. A voltage stabilizing spring is sleeved on the surface of the voltage stabilizing slide rods located between the piston pressure plate and the mounting plate.

[0017] As a further description of the above technical solution:

[0018] One end of the pressure stabilizing box is fixedly connected to a vent pipe, and both ends of the vent pipe are connected to the reaction vessel and the pressure stabilizing box, respectively. A barometer is installed at the top end of the pressure stabilizing box located at the top of the vent pipe. An adjusting screw is fixedly connected to one side of the piston pressure plate at the center position of the four pressure stabilizing slide rods. The end of the adjusting screw away from the piston pressure plate extends through the mounting plate and the pressure stabilizing box to the outside of the pressure stabilizing box. The smooth surface of the adjusting screw is slidably connected to the mounting plate. The threaded surface of the adjusting screw located on the outside of the pressure stabilizing box is threadedly connected to an adjusting screw sleeve.

[0019] A method of using a polymerization reactor for polyethylene glycol production, the method comprising the following steps:

[0020] Tighten the adjusting screw sleeve to adjust its position on the adjusting screw surface, limiting the movement of the piston plate inside the pressure stabilizing box. After injecting the liquid or gaseous raw materials required for polyethylene glycol production into the reaction tank through the liquid inlet and gas inlet head, start the drive motor to drive the drive turntable to rotate. Under the linkage of the linkage bar, the drive turntable drives the drive gear to rotate at the bottom of the reaction tank. Through the meshing action of the drive gear and the three driven gears, the three driven gears are driven to rotate synchronously at the bottom of the reaction tank, so that the three stirring racks rotate synchronously inside the reaction tank to mix and react the raw materials for polyethylene glycol production.

[0021] The stirring frame drives the second bevel gear to rotate at the top of the reaction tank. Through the meshing action of the second bevel gear and the first bevel gear, the rotating column rotates between the two support plates, causing the transmission gear to rotate at the top of the linkage gear ring, driving the rotating sleeve to rotate on the surface of the reaction tank, causing the three moving slide columns to slide inside the moving slide groove. When one of the moving slide columns moves to the upper sliding groove of the moving slide groove, it drives the connecting end plate to slide up inside the piston sleeve, pulling the connecting slide rod to slide inside the fixed plate, causing the piston cylinder to slide up at the bottom inside the piston sleeve, drawing the mixture produced by polyethylene glycol inside the reaction tank into the piston sleeve. When the moving slide column moves to the lower sliding groove of the moving slide groove, it drives the connecting end plate to press down the connecting slide rod inside the piston sleeve to control the piston cylinder to slide down. At the same time, the return spring rebounds and presses down the piston cylinder, squeezing the mixture inside the piston sleeve out of the through hole, pushing the liquid to form turbulent and rolling motion, tearing the liquid into droplets, liquid films or liquid streams, increasing the contact area between liquid and gas in the mixture.

[0022] When the raw materials for polyethylene glycol production undergo polymerization inside the reaction tank, the temperature and pressure inside the tank increase. Gas is introduced into the pressure stabilizing tank through the vent pipe, pushing a piston plate to slide inside the tank. A barometer monitors the pressure inside the pressure stabilizing tank in real time. As the piston plate slides inside the tank, it pushes a pressure stabilizing rod to slide on one side of the mounting plate, compressing and deforming the pressure stabilizing spring between the piston plate and the mounting plate, thus stabilizing the pressure inside the reaction tank. When the pressure inside the reaction tank decreases, the pressure stabilizing spring rebounds, pushing the piston plate and directing the gas inside the pressure stabilizing tank towards... The reaction vessel is used to stabilize the internal pressure. As the reaction gradually completes, the internal pressure gradually decreases, causing the pressure-stabilizing spring to rebound and push the piston plate, which in turn pushes the gas from the pressure-stabilizing tank into the reaction vessel. The pressure gauge is observed in real time to determine the pressure inside the pressure-stabilizing tank and to confirm the degree of polymerization of polydiethanol inside the reaction vessel. The polymerization reaction of polydiethanol inside the reaction vessel is considered to be nearing completion when the pressure displayed on the pressure gauge remains stable for an extended period and no longer decreases. At this point, the electromagnetic discharge valve is opened to discharge the completed product from the reaction vessel.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0024] 1. In this invention, by setting up a drive turntable, a stirring frame, a transmission gear, a rotating sleeve, a piston cylinder, a return spring, and a moving slide column, after the liquid and gaseous raw materials for the production of polydiethanol are injected into the reaction tank, the drive motor is started to drive the drive turntable to rotate. Under the connection of the linkage bar, the drive gear drives the three driven gears to rotate synchronously, so that the driven gears drive the stirring frame to stir the liquid and gaseous raw materials for the production of polydiethanol inside the reaction tank for mixing and reaction. At the same time, under the meshing action of bevel gear one and bevel gear two, the transmission gear drives the linkage gear ring to rotate on the surface of the reaction tank, so that the rotating sleeve is pressed tightly against the surface of the reaction tank. The rotating sleeve drives the moving slide to slide on the surface of the moving slide column until the moving slide column moves upward to the upper sliding groove of the moving slide, pushing the connecting end plate to drive the piston cylinder to slide upward inside the piston sleeve, drawing the liquid inside the reaction tank away from the flow into the piston sleeve. When the moving slide column moves downward to the lower sliding groove of the moving slide, the return spring rebounds and presses down the piston cylinder, squeezing the liquid drawn from inside the piston sleeve out of the through hole, causing the liquid to form turbulent and rolling motion inside the reaction tank, increasing the contact area between the liquid and gas in the mixture, and improving the efficiency of the mixing reaction of liquid and gaseous raw materials used for the production of polydiethanol inside the reaction tank.

[0025] 2. In this invention, a barometer, piston plate, pressure stabilizing spring, adjusting screw, and adjusting sleeve are installed. Tightening the adjusting sleeve adjusts its position on the adjusting screw surface, restricting the sliding position of the piston plate inside the pressure stabilizing chamber. When gas from the reaction vessel enters the pressure stabilizing chamber through the vent pipe, the pressure inside the chamber increases, which is monitored in real time by the barometer. Simultaneously, the gas pushes the piston plate to slide inside the pressure stabilizing chamber, stabilizing the gas pressure inside both the pressure stabilizing chamber and the reaction vessel. As the piston plate slides inside the pressure stabilizing chamber, it compresses and deforms the pressure stabilizing spring. As the polymerization reaction inside the reaction vessel gradually completes, the gas pressure inside the reaction vessel gradually decreases. The pressure stabilizing spring rebounds, pushing the piston plate to push the gas from the pressure stabilizing chamber into the reaction vessel, stabilizing the gas pressure inside the reaction vessel and preventing sudden changes in gas pressure that could cause equipment vibration or seal leakage. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the polymerization reaction equipment and its usage method for producing polyethylene glycol according to the present invention;

[0027] Figure 2 This is a cross-sectional schematic diagram of a polymerization reaction device for producing polyethylene glycol and its usage method proposed in this invention;

[0028] Figure 3 This is a schematic diagram of the linkage gear ring and transmission gear in a polymerization reaction device for producing polyethylene glycol and its usage method proposed in this invention.

[0029] Figure 4This is a schematic diagram of the gasket and rotating sleeve in a polymerization reaction device for producing polyethylene glycol and its usage method proposed in this invention.

[0030] Figure 5 This is a cross-sectional schematic diagram of the piston sleeve and piston cylinder of a polymerization reaction device for producing polyethylene glycol and its usage method proposed in this invention.

[0031] Figure 6 This is a cross-sectional schematic diagram of the pressure stabilizing tank and regulating screw of a polymerization reaction device for polyethylene glycol production and its usage method proposed in this invention.

[0032] Legend:

[0033] 1. Reaction vessel; 101. Gasket; 102. Ball bearing; 103. Infusion connector; 104. Gas delivery head; 2. Drive mechanism; 201. Drive motor; 202. Drive turntable; 203. Linkage bar; 204. Drive gear; 205. Driven gear; 3. Electromagnetic discharge valve; 4. Stirring frame; 5. Piston backflushing mechanism; 501. Piston sleeve; 502. Through hole; 503. Piston cylinder; 504. Fixed plate; 505. Connecting slide bar; 506. Return spring; 507. Connecting end plate; 508. Moving slide bar 6. Column; 7. Rotating sleeve; 8. Moving slide; 9. Limiting slide; 10. Linkage gear ring; 11. Pressure stabilizing mechanism; 12. Pressure stabilizing box; 13. Vent pipe; 14. Barometer; 15. Piston pressure plate; 16. Mounting plate; 17. Pressure stabilizing slide rod; 18. Connecting ring; 19. Pressure stabilizing spring; 10. Adjusting screw; 11. Adjusting screw sleeve; 22. Transmission mechanism; 33. Support plate; 44. Rotating column; 55. Bevel gear one; 66. Bevel gear two; 77. Transmission gear. Detailed Implementation

[0034] 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.

[0035] In its specific implementation, such as Figures 1-6 The present invention provides a technical solution:

[0036] A polymerization reaction apparatus for producing polyethylene glycol includes: a reaction tank 1; a liquid inlet 103 and a gas inlet 104 connected at the top of the reaction tank between a pressure stabilizing mechanism 7 and a transmission mechanism 8; a drive mechanism 2 at the bottom of the reaction tank 1; an electromagnetic discharge valve 3 fixedly connected to the bottom of the outer surface of the reaction tank 1 and communicating with the interior of the reaction tank 1; three stirring racks 4 rotatably mounted inside the reaction tank 1 via bearings; the drive mechanism 2 includes a drive motor 201; a drive turntable 202 fixedly connected to the output end of the drive motor 201; a linkage bar 203 rotatably connected to the bottom edge of the drive turntable 202 via a rotating shaft; and a drive gear 204 rotatably mounted on the end of the linkage bar 203 away from the drive turntable 202 via a rotating shaft. The top of the drive gear 204 is rotatably connected to the bottom of the reaction tank 1 via a bearing. Three driven gears 205 are meshed at equal angles on the surface of the drive gear 204, and the top of the driven gears 205 is fixedly connected to the bottom of the stirring rack 4. When the drive motor 201 is started, it drives the drive turntable 202 to rotate, which in turn drives the linkage bar 203 to drive the drive gear 204 to rotate synchronously at the bottom of the reaction tank 1. Under the meshing action of the drive gear 204 and the three driven gears 205, the three driven gears 205 are controlled to rotate synchronously at the bottom of the reaction tank 1, so that the three stirring racks 4 rotate synchronously inside the reaction tank 1, stirring the liquid raw materials inside the reaction tank 1, increasing the contact area between the liquid raw materials and the gaseous raw materials inside the reaction tank 1, and accelerating the reaction efficiency of polydiethanol.

[0037] Three piston back-jet mechanisms 5 are fixedly installed at equal angles on the inner wall of reaction vessel 1. Each piston back-jet mechanism 5 includes a piston sleeve 501. Multiple through holes 502 are provided at the bottom of the outer surface of the piston sleeve 501. A piston cylinder 503 is slidably connected through the piston sleeve 501. A fixing plate 504 is fixedly connected at the center of the piston sleeve 501. Three connecting slide rods 505 are fixedly connected to the bottom of the piston cylinder 503. The top ends of the three connecting slide rods 505 pass through the fixing plate 504 and are fixedly connected to a connecting end plate 507. The connecting slide rods 505 and the fixing plate 504 are slidably connected through the connecting plate 504. A return spring 506 is sleeved on the surface of the connecting slide rod 505 at the bottom of the fixing plate 504. A movable sliding column 508 is fixedly connected to one side of the connecting end plate 507. The connecting end plate 507 drives the connecting sliding rod 505 to slide inside the fixed plate 504, lifting the piston cylinder 503 to slide upward inside the piston sleeve 501, drawing liquid from inside the reaction vessel 1 into the piston sleeve 501. At the same time, the return spring 506 is squeezed and deformed between the fixed plate 504 and the piston cylinder 503. When the connecting end plate 507 presses down on the connecting sliding rod 505, the return spring 506 rebounds and presses down on the piston cylinder 503, squeezing the liquid accumulated inside the piston sleeve 501 out of the through hole 502. This causes the liquid to be squeezed out of the piston sleeve 501, forming turbulent and rolling motion, which improves the efficiency of the liquid and gas contact reaction in the mixture.

[0038] A gasket 101 is fixedly connected to the center of the outer surface of the reaction vessel 1. Multiple balls 102 are rolled and embedded in the inner wall of the gasket 101. A rotating sleeve 6 is rotatably mounted on the top inner side of the gasket 101. The inner wall of the rotating sleeve 6 has a sliding groove 601, and three sliding columns 508 are slidably connected inside the sliding groove 601. A limiting groove 602 is provided at the bottom of the outer surface of the rotating sleeve 6, and the limiting groove 602 corresponds to the position of the balls 102. The balls 102 are rolled and connected inside the limiting groove 602. A linkage gear ring 603 is fixedly connected to the top of the rotating sleeve 6. When the rotating sleeve 6 rotates on top of the gasket 101, the ball 102 rolls on the surface of the limiting groove 602, thereby reducing the friction of the rotating sleeve 6 when rotating on top of the gasket 101. At the same time, the rotating sleeve 6 drives the moving groove 601 to slide on the surface of the three moving sliding columns 508. When one of the moving sliding columns 508 slides to the upper sliding groove and the lower sliding groove of the moving groove 601, it drives the connecting end plate 507 to slide up and down, driving the three connecting end plates 507 to slide up and down intermittently, so that the liquid inside the three sets of piston sleeves 501 is intermittently squeezed out, and turbulent and rolling motions are intermittently formed at different positions inside the reaction tank 1.

[0039] A transmission mechanism 8 is provided on the side of the top of the reaction vessel 1 away from the pressure stabilizing mechanism 7. The transmission mechanism 8 includes two support plates 801, which are fixed to the top of the reaction vessel 1. A rotating column 802 is rotatably mounted between the two support plates 801 via a bearing. A bevel gear 803 is fixedly connected to the surface of the rotating column 802 between the two support plates 801. A bevel gear 804 meshes with the bottom of the bevel gear 803, and the bevel gear 804 is fixedly connected to one of the stirring frames 4. One end of the rotating column 802 passes through the support plate 801 and is fixedly connected to a transmission gear 805, which meshes with the top of the linkage gear ring 603. The stirring frame 4 drives the bevel gear 804 to rotate. Under the meshing of the bevel gear 804 and the bevel gear 803, the rotating column 802 rotates between the two support plates 801, driving the transmission gear 805 to rotate on the top of the linkage gear ring 603, so that the linkage gear ring 603 drives the rotating sleeve 6 to rotate on the surface of the reaction vessel 1.

[0040] A pressure stabilizing mechanism 7 is fixedly connected to one side of the top of the reaction vessel 1. The pressure stabilizing mechanism 7 includes a pressure stabilizing box 701. A piston pressure plate 704 is slidably connected to one side inside the pressure stabilizing box 701. A mounting plate 705 is fixedly connected to the center of the pressure stabilizing box 701. Four pressure stabilizing slide rods 706 are fixedly connected to the side of the piston pressure plate 704 near the mounting plate 705, and the pressure stabilizing slide rods 706 are slidably connected to the mounting plate 705. The ends of the four pressure stabilizing slide rods 706 away from the piston pressure plate 704 pass through the mounting plate 705 and are fixedly connected to a connecting ring 707. The pressure stabilizing slide rods 706 are located between the piston pressure plate 704 and the mounting plate 705. A pressure-stabilizing spring 708 is fitted onto the surface of the reactor. Gas entering the pressure stabilizing tank 701 from the reactor 1 pushes the piston plate 704 to slide inside the pressure stabilizing tank 701, causing the pressure-stabilizing spring 708 to be squeezed and deformed between the piston plate 704 and the mounting plate 705, thus stabilizing the pressure inside the reactor 1. As the polymerization reaction inside the reactor 1 gradually completes, the pressure inside the reactor 1 gradually decreases. Under the rebound action of the pressure-stabilizing spring 708, the piston plate 704 is pushed to squeeze the gas inside the pressure stabilizing tank 701 into the reactor 1, stabilizing the pressure inside the reactor 1 and preventing sudden pressure changes that could damage the reactor 1.

[0041] A vent pipe 702 is fixedly connected to one end of a pressure stabilizing box 701, and both ends of the vent pipe 702 are connected to the reaction vessel 1 and the pressure stabilizing box 701, respectively. A pressure gauge 703 is installed at the top end of the pressure stabilizing box 701 located at the top of the vent pipe 702. An adjusting screw 709 is fixedly connected to one side of the piston plate 704 at the center position of the four pressure stabilizing slide rods 706. The end of the adjusting screw 709 away from the piston plate 704 extends through the mounting plate 705 and the pressure stabilizing box 701 to the outside of the pressure stabilizing box 701. The smooth surface of the adjusting screw 709 is slidably connected to the mounting plate 705. The adjusting screw 709 is located outside the pressure stabilizing box 701. An adjusting sleeve 710 is threaded through the threaded surface on the side, controlling the position of the adjusting sleeve 710 on the surface of the adjusting screw 709, limiting the sliding distance of the piston plate 704 inside the pressure stabilizing box 701, thereby regulating the pressure stabilization range of the pressure stabilizing box 701 and ensuring the stability of the internal pressure of the reaction vessel 1. The reaction vessel 1 and the pressure stabilizing box 701 are connected through the vent pipe 702, so that the internal pressure of the pressure stabilizing box 701 and the reaction vessel 1 are the same. At the same time, the barometer 703 monitors the pressure change of the pressure stabilizing box 701 in real time. Based on the pressure change monitored by the barometer 703, it can be determined whether the polymerization reaction inside the reaction vessel 1 has been completed.

[0042] A method for using a polymerization reaction apparatus for producing polyethylene glycol, comprising the following steps:

[0043] Tighten the adjusting screw sleeve 710 to adjust the position of the adjusting screw sleeve 710 on the surface of the adjusting screw 709, and limit the movement of the piston plate 704 inside the pressure stabilizing box 701. After injecting the liquid or gas raw materials required for polyethylene glycol production into the reaction tank 1 through the liquid inlet connector 103 and the gas inlet head 104, start the drive motor 201 to drive the drive turntable 202 to rotate. Under the linkage of the linkage bar 203, the drive turntable 202 drives the drive gear 204 to rotate at the bottom of the reaction tank 1. Through the meshing action of the drive gear 204 and the three driven gears 205, the three driven gears 205 are driven to rotate synchronously at the bottom of the reaction tank 1, so that the three stirring racks 4 rotate synchronously inside the reaction tank 1 to stir the raw materials for polyethylene glycol production inside the reaction tank 1 for mixing and reaction.

[0044] The stirring rack 4 drives the second bevel gear 804 to rotate at the top of the reaction tank 1. Through the meshing of the second bevel gear 804 and the first bevel gear 803, the rotating column 802 rotates between the two support plates 801, causing the transmission gear 805 to rotate at the top of the linkage gear ring 603. This drives the rotating sleeve 6 to rotate on the surface of the reaction tank 1, causing the three movable sliding columns 508 to slide inside the movable sliding groove 601. When one of the movable sliding columns 508 moves to the upper sliding inclined groove of the movable sliding groove 601, it drives the connecting end plate 507 to slide upward inside the piston sleeve 501, pulling the connecting sliding rod 505 to slide inside the fixed plate 504. Piston cylinder 503 slides upward at the bottom inside piston sleeve 501, drawing the mixture produced by polyethylene glycol inside reaction vessel 1 into piston sleeve 501. When moving slide column 508 moves to the downward inclined groove of moving slide groove 601, it drives connecting end plate 507 to press down connecting slide rod 505 inside piston sleeve 501 to control piston cylinder 503 to slide down. At the same time, return spring 506 rebounds and presses down piston cylinder 503, squeezing the mixture inside piston sleeve 501 out of through hole 502, pushing the liquid to form turbulent and rolling motion, tearing the liquid into droplets, liquid film or liquid stream, increasing the contact area between liquid and gas in the mixture.

[0045] When the raw materials for polyethylene glycol production undergo polymerization inside reaction tank 1, the temperature and pressure inside reaction tank 1 increase. Gas enters the pressure stabilizing box 701 through vent pipe 702, pushing piston plate 704 to slide inside pressure stabilizing box 701. Pressure gauge 703 monitors the pressure inside pressure stabilizing box 701 in real time. When piston plate 704 slides inside pressure stabilizing box 701, it pushes pressure stabilizing slide rod 706 to slide on one side of mounting plate 705, compressing and deforming pressure stabilizing spring 708 between piston plate 704 and mounting plate 705, stabilizing the pressure inside reaction tank 1. When the pressure inside reaction tank 1 decreases, pressure stabilizing spring 708 rebounds, pushing piston plate 704, thus stabilizing the pressure inside reaction tank 1. The gas inside the pressure stabilizing tank 701 pushes against the reaction vessel 1, stabilizing the pressure inside the reaction vessel 1. As the reaction inside the reaction vessel 1 gradually completes, the pressure inside the reaction vessel 1 gradually decreases, causing the pressure stabilizing spring 708 to rebound and push the piston plate 704, pushing the gas inside the pressure stabilizing tank 701 into the reaction vessel 1. The pressure gauge 703 is observed in real time to determine the gas pressure inside the pressure stabilizing tank 701 and to confirm the degree of polymerization of polydiethanol inside the reaction vessel 1. Until the pressure displayed by the pressure gauge 703 remains stable for a long time and no longer decreases, it indicates that the polymerization of polydiethanol inside the reaction vessel 1 is nearing completion. The electromagnetic discharge valve 3 is then opened to discharge the completed product from the reaction vessel 1.

Claims

1. A polymerization reaction apparatus for producing polyethylene glycol, characterized in that, include: A reaction vessel (1) is provided with a drive mechanism (2) at the bottom. An electromagnetic discharge valve (3) is fixedly connected to the bottom of the outer surface of the reaction vessel (1), and the electromagnetic discharge valve (3) is connected to the inside of the reaction vessel (1). Three stirring racks (4) are installed inside the reaction vessel (1) through bearings rotating at equal angles. Three piston backwash mechanisms (5) are fixedly installed on the inner wall of the reaction vessel (1) at equal angles. A gasket (101) is fixedly connected at the center of the outer surface of the reaction vessel (1). (101) Multiple rolling balls (102) are embedded in the inner wall. A rotating sleeve (6) is tightly and rotatably installed on the top of the inner side of the displacement pad ring (101) of the reaction tank (1). A pressure stabilizing mechanism (7) is fixedly connected to one side of the top of the reaction tank (1). A transmission mechanism (8) is provided on the side of the top of the reaction tank (1) away from the pressure stabilizing mechanism (7). A liquid infusion connector (103) and a gas infusion head (104) are connected between the pressure stabilizing mechanism (7) and the transmission mechanism (8) on the top of the reaction tank (1).

2. The polymerization reaction equipment for producing polyethylene glycol according to claim 1, characterized in that, The driving mechanism (2) includes a driving motor (201), and a driving turntable (202) is fixedly connected to the output end of the driving motor (201). A linkage bar (203) is rotatably connected to the bottom edge of the driving turntable (202) via a rotating shaft. A driving gear (204) is rotatably installed at the end of the linkage bar (203) away from the driving turntable (202) via a rotating shaft. The top of the driving gear (204) is rotatably connected to the bottom of the reaction tank (1) via a bearing. Three driven gears (205) are meshed at equal angles on the surface of the driving gear (204), and the top of the driven gears (205) is fixedly connected to the bottom end of the stirring rack (4).

3. The polymerization reaction equipment for producing polyethylene glycol according to claim 1, characterized in that, The piston recoil mechanism (5) includes a piston sleeve (501). The bottom of the outer surface of the piston sleeve (501) is provided with multiple through holes (502). A piston cylinder (503) is slidably connected inside the piston sleeve (501). A fixing plate (504) is fixedly connected at the center of the piston sleeve (501). Three connecting slide rods (505) are fixedly connected to the bottom of the piston cylinder (503). The top ends of the three connecting slide rods (505) pass through the fixing plate (504) and are fixedly connected to a connecting end plate (507). The connecting slide rods (505) and the fixing plate (504) are slidably connected. A return spring (506) is sleeved on the surface of the connecting slide rod (505) at the bottom of the fixing plate (504). A movable slide column (508) is fixedly connected to one side of the connecting end plate (507).

4. The polymerization reaction equipment for producing polyethylene glycol according to claim 3, characterized in that, The inner wall of the rotating sleeve (6) is provided with a movable slide groove (601), and three movable slide columns (508) are slidably connected inside the movable slide groove (601). The bottom of the outer surface of the rotating sleeve (6) is provided with a limiting slide groove (602), and the limiting slide groove (602) corresponds to the position of the ball (102). The ball (102) is slidably connected inside the limiting slide groove (602). The top of the rotating sleeve (6) is fixedly connected with a linkage toothed ring (603).

5. The polymerization reaction equipment for producing polyethylene glycol according to claim 4, characterized in that, The transmission mechanism (8) includes a support plate (801), and there are two support plates (801). The two support plates (801) are fixed to the top of the reaction vessel (1). A rotating column (802) is rotatably installed between the two support plates (801) through a bearing. A bevel gear (803) is fixedly connected to the surface of the rotating column (802) between the two support plates (801). A bevel gear (804) meshes with the bottom of the bevel gear (803). The bevel gear (804) is fixedly connected to one of the stirring racks (4). One end of the rotating column (802) passes through the support plate (801) and is fixedly connected to a transmission gear (805). The transmission gear (805) meshes with the top of the linkage gear ring (603).

6. The polymerization reaction equipment for producing polyethylene glycol according to claim 1, characterized in that, The pressure stabilizing mechanism (7) includes a pressure stabilizing box (701). A piston pressure plate (704) is slidably connected to one side of the inside of the pressure stabilizing box (701). An mounting plate (705) is fixedly connected to the center of the inside of the pressure stabilizing box (701). Four pressure stabilizing slide rods (706) are fixedly connected to the side of the piston pressure plate (704) near the mounting plate (705). The pressure stabilizing slide rods (706) are slidably connected to the mounting plate (705). A connecting ring (707) is fixedly connected to one end of the four pressure stabilizing slide rods (706) away from the piston pressure plate (704) through the mounting plate (705). A pressure stabilizing spring (708) is sleeved on the surface of the pressure stabilizing slide rod (706) between the piston pressure plate (704) and the mounting plate (705).

7. The polymerization reaction equipment for producing polyethylene glycol according to claim 6, characterized in that, One end of the pressure stabilizing box (701) is fixedly connected to a vent pipe (702), and both ends of the vent pipe (702) are connected to the reaction vessel (1) and the pressure stabilizing box (701) respectively. A barometer (703) is provided at the top end of the pressure stabilizing box (701) located at the top of the vent pipe (702). An adjusting screw (709) is fixedly connected to one side of the piston pressure plate (704) at the center position of the four pressure stabilizing slide rods (706). The end of the adjusting screw (709) away from the piston pressure plate (704) passes through the mounting plate (705) and the pressure stabilizing box (701) and extends to the outside of the pressure stabilizing box (701). The smooth surface of the adjusting screw (709) is slidably connected to the mounting plate (705). The threaded surface of the adjusting screw (709) located on the outside of the pressure stabilizing box (701) is threadedly connected to an adjusting screw sleeve (710).

8. A method of using a polymerization reaction apparatus for producing polyethylene glycol, as described in any one of claims 1-7, characterized in that, The method of use includes the following steps: Tighten the adjusting screw sleeve (710) to adjust the position of the adjusting screw sleeve (710) on the surface of the adjusting screw (709), and limit the movement of the piston plate (704) inside the pressure stabilizing box (701). After injecting the liquid or gas raw materials required for polyethylene glycol production into the reaction tank (1) through the liquid infusion connector (103) and the gas infusion head (104), start the drive motor (201) to drive the drive turntable (202) to rotate. Under the linkage of the linkage bar (203), the drive turntable (202) drives the drive gear (204) to rotate at the bottom of the reaction tank (1). Through the meshing action of the drive gear (204) and the three driven gears (205), the three driven gears (205) are driven to rotate synchronously at the bottom of the reaction tank (1), so that the three stirring racks (4) rotate synchronously inside the reaction tank (1) to stir the raw materials for polyethylene glycol production inside the reaction tank (1) for mixing and reaction. The stirring rack (4) drives the second bevel gear (804) to rotate at the top of the reaction tank (1). Through the meshing action of the second bevel gear (804) and the first bevel gear (803), the rotating column (802) is driven to rotate between the two support plates (801), causing the transmission gear (805) to rotate at the top of the linkage gear ring (603), driving the rotating sleeve (6) to rotate on the surface of the reaction tank (1), causing the three movable sliding columns (508) to slide inside the movable sliding groove (601). When one of the movable sliding columns (508) moves to the upper sliding inclined groove of the movable sliding groove (601), it drives the connecting end plate (507) to slide upward inside the piston sleeve (501), pulling the connecting sliding rod (505) inside the fixed plate (504). The piston cylinder (503) slides upward inside the piston sleeve (501) to draw the mixture produced by polyethylene glycol inside the reaction vessel (1) into the piston sleeve (501). When the moving slide column (508) moves to the downward inclined groove of the moving slide groove (601), it drives the connecting end plate (507) to press down the connecting slide rod (505) inside the piston sleeve (501) to control the piston cylinder (503) to slide down. At the same time, the return spring (506) rebounds and presses down the piston cylinder (503), squeezing the mixture inside the piston sleeve (501) out of the through hole (502), pushing the liquid to form turbulent and rolling motion, tearing the liquid into droplets, liquid films or liquid streams, and increasing the contact area between the liquid and gas in the mixture. When the raw materials for polyethylene glycol production undergo polymerization in the reaction tank (1), the temperature and pressure inside the reaction tank (1) increase. Gas enters the pressure stabilizing box (701) through the vent pipe (702), pushing the piston plate (704) to slide inside the pressure stabilizing box (701). The pressure gauge (703) monitors the pressure inside the pressure stabilizing box (701) in real time. When the piston plate (704) slides inside the pressure stabilizing box (701), it pushes the pressure stabilizing slide rod (706) to slide on one side of the mounting plate (705), compressing the pressure stabilizing spring (708) between the piston plate (704) and the mounting plate (705), thus stabilizing the pressure inside the reaction tank (1). When the pressure inside the reaction tank (1) decreases, the pressure stabilizing spring (708) rebounds and pushes up the piston plate (704). The gas inside the pressure stabilizing box (701) is pushed towards the reaction tank (1) to stabilize the pressure inside the reaction tank (1). As the reaction inside the reaction tank (1) gradually completes, the pressure inside the reaction tank (1) gradually decreases, causing the pressure stabilizing spring (708) to rebound and push the piston plate (704) to push the gas inside the pressure stabilizing box (701) into the reaction tank (1). The pressure gauge (703) is observed in real time to determine the pressure inside the pressure stabilizing box (701) and to confirm the degree of polymerization of polydiethanol inside the reaction tank (1). Until the pressure displayed by the pressure gauge (703) remains stable for a long time and no longer decreases, it indicates that the polymerization of polydiethanol inside the reaction tank (1) is nearing completion. The electromagnetic discharge valve (3) is then opened to discharge the product from the reaction tank (1).

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