Multilayer compound stirring type high-efficiency esterification reactor

Abstract

The present application relates to esterification reactor technical field, and specifically disclose a kind of multilayer composite stirring type high-efficiency esterification reactor, the middle part of the top of kettle body is fixedly connected with driving part, the top of kettle body is fixedly connected with feeding component, the bottom of kettle body is fixedly connected with discharge valve, the inside of kettle body is fixedly connected with support, it further includes rotatingly arranged in the top of support mixing shaft, the side of mixing shaft is fixedly connected with stirring paddle, the top of mixing shaft is fixedly connected with the output end of driving part.The multilayer composite stirring type high-efficiency esterification reactor, upper and lower end of contact frame adapts kettle body upper and lower camber surface, the contact plate of both sides corresponds kettle body vertical cylinder section, compared with the wall cleaning structure of traditional only cleaning vertical kettle wall, both kettle sidewall can be cleaned, and kettle upper part and kettle bottom fillet position can be cleaned, eliminate kettle camber dead angle, reduce viscous esterification material in kettle dead angle residue.

Description

Technical Field

[0001] This invention relates to the field of esterification reactor technology, specifically a multi-level composite stirred high-efficiency esterification reactor. Background Technology

[0002] Esterification is a common reaction type in chemical production, widely used in plasticizers, polyesters, coatings, and other fields. Esterification reactions typically require the presence of a catalyst and specific temperature conditions. The uniformity of the reactant mixture directly affects the reaction rate and product yield. However, esterification reaction systems often involve heterogeneous materials (such as solid-phase catalysts and liquid-phase reactants), and the viscosity of the materials may change during the reaction, placing high demands on the stirring device. A multi-layered composite stirring high-efficiency esterification reactor is a specialized chemical equipment adapted to esterification synthesis processes. The equipment mainly consists of a corrosion-resistant reactor body, multi-layered composite stirring components, a transmission and sealing mechanism, a heat exchange and temperature control system, and a condensation by-product separation component. It abandons the traditional single-layer stirring mode, arranging turbine propellers, inclined blade propellers, and anchor propellers in a layered configuration. The upper layer propellers agitate the upper material to form radial circulation, the middle layer propellers enhance turbulent mixing, and the bottom layer anchor propellers... The impeller scrapes away material from the reactor wall, eliminating dead zones in the stirring process and adapting to the viscosity changes from low to high throughout the esterification process. Multi-stage stirring enables the material to circulate vertically, increasing the contact area between reactants and improving heat and mass transfer conditions within the reactor. Combined with a jacketed or coiled heat exchange structure, the reaction temperature is precisely controlled. Furthermore, an external condensation recovery device promptly separates water and alcohol byproducts generated during esterification, disrupting chemical equilibrium, effectively increasing the esterification conversion rate, shortening the reaction cycle, and reducing production energy consumption. The overall sealing performance is reliable, and the operation is stable and safe. It can be widely used in the esterification synthesis of chemical products such as resins, ester additives, and polyester materials. Chinese Patent CN223969977U discloses an esterification reactor, including a reactor body. The top cover of the reactor body is equipped with multiple feeding components, each including a conical inlet with a removable sealing cap at the top. The bottom of the inlet is connected to the inside of the reactor body. The reactor body is equipped with a stirring device, which includes a stirring rod and a stirring impeller. It can solve the problems of high raw material and auxiliary material loss, high energy consumption, and high production cost during the esterification reaction process; In this technical solution, a detachable sealing cap is used to seal the feed inlet of the reactor. Although this structure can seal the feed inlet and meet the sealing requirements of the negative pressure condition inside the reactor, the installation and removal of the sealing cap still rely on manual labor. Workers need to manually align, tighten, or remove the cap, which is not only labor-intensive, but also poses a safety hazard because acidic and alcoholic raw materials are highly volatile and workers are likely to come into contact with corrosive media when operating at close range. When the raw materials are fed into the reactor through the feed pipe, viscous alcoholic and carboxylic acid raw materials are very easy to adhere to the inner wall of the feed pipe. Long-term residue of the material adhering to the pipe wall will age and deteriorate, and subsequent shedding into the reactor will increase the generation of by-products and reduce the quality of the esterified product. At the same time, the adhering raw materials cannot participate in the reaction, which will also cause waste of raw materials. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a multi-level composite stirred high-efficiency esterification reactor, comprising: The vessel body has a drive component fixedly connected to the middle of its top, a feeding component fixedly connected to the top of the vessel body, a discharge valve fixedly connected to the bottom of the vessel body, and a support fixedly connected to the inner side of the vessel body. It also includes a mixing shaft rotatably mounted on the top of the support, a stirring paddle fixedly connected to the side of the mixing shaft, the top of the mixing shaft fixedly connected to the output end of the drive component, a defoamer fixedly connected to the side of the mixing shaft, and a contact component fixedly connected to the side of the mixing shaft. Furthermore, the contact component includes a contact frame sleeved on the side of the mixing shaft, with contact housings fixedly connected to both sides of the contact frame, and a contact plate slidably connected to the inner side of the contact housing. Sliding shafts are evenly arranged on the side of the contact plate. One end of the sliding shaft is fixedly connected to the contact plate, and the other end of the sliding shaft is fixedly connected to a baffle. The side of the baffle is slidably connected to the inner side of the contact housing, and the side of the sliding shaft is slidably connected to the inner side of the contact housing. A first spring is sleeved on the sliding shaft. One end of the first spring is fixedly connected to the inner side of the contact housing, and the other end of the first spring is fixedly connected to the baffle. Furthermore, the feeding component includes a feeding pipe fixedly connected to the top of the inner cavity of the vessel, and an annular positioning groove is provided on the top of the feeding pipe. A fixing frame is fixedly connected to the side of the feeding pipe, a connecting shaft is fixedly connected to the top of the fixing frame, a top plate is fixedly connected to the top of the connecting shaft, and a cylinder is fixedly connected to the top of the top plate. Furthermore, it also includes a sealing mechanism fixedly connected to the cylinder output end, and a cleaning mechanism is fixedly connected to the bottom of the sealing mechanism; Furthermore, the sealing mechanism includes a sealing cover plate, which is concentrically arranged with the feed pipe. A sealing element is fixedly connected to the bottom of the sealing cover plate. Connecting rods are evenly arranged on the inner side of the sealing cover plate. The top of the connecting rods is slidably connected to the inner side of the sealing cover plate. A sealing block is fixedly connected to the bottom of the connecting rods. The side of the sealing block is slidably connected to the inner side of the sealing cover plate. A second spring is sleeved on the connecting rod. The top of the second spring is fixedly connected to the inner side of the sealing cover plate. The bottom of the second spring is fixedly connected to the top of the sealing block. Furthermore, the cleaning mechanism includes a connecting frame, the top of which is fixedly connected to the bottom of the sealing block. A cleaning shaft is fixedly connected to the inner side of the connecting frame. A cleaning frame is slidably connected to the middle of the cleaning shaft. A guide frame is fixedly connected to the side of the cleaning shaft. A third spring is sleeved on both the upper and lower sides of the cleaning shaft. The top of the upper third spring is fixedly connected to the bottom of the connecting frame and the top of the cleaning frame. The top of the lower third spring is fixedly connected to the bottom of the cleaning frame and the bottom of the guide frame. Round shafts are evenly arranged at the bottom of the cleaning frame. The side of the round shaft is slidably connected to the inner side of the guide frame. The top of the round shaft is fixedly connected to the bottom of the cleaning frame. A cross is fixedly connected to the bottom of the round shaft. An impact block is fixedly connected to the inner side of the cross. The impact block is concentrically arranged with the cleaning shaft.

[0004] This invention provides a multi-level composite stirred high-efficiency esterification reactor. It has the following beneficial effects: 1. This multi-layered composite stirring high-efficiency esterification reactor has contact frames at the upper and lower ends that are adapted to the upper and lower arc surfaces of the reactor body, and contact plates on both sides that correspond to the vertical cylindrical sections of the reactor body. Compared with the traditional wall scraping structure that only cleans the vertical reactor wall, this reactor can clean the side walls of the reactor body, as well as the upper part of the reactor body and the rounded corners of the bottom of the reactor body, eliminating the dead corners of the reactor body and reducing the residue of viscous esterification materials in the dead corners inside the reactor.

[0005] 2. This multi-layered composite stirring high-efficiency esterification reactor features relative sliding between the contact plate and the contact shell. The inner wall of the contact shell can scrape off viscous materials adhering to the surface of the contact plate, preventing the esterification resin from adhering to the surface of the contact plate for a long time and solidifying and clumping. The high-speed rotation of the mixing shaft generates centrifugal force, which throws the residual materials on the contact frame and contact plate to the bottom of the reactor and discharges them with the next batch of materials. There is no need for staff to enter the reactor to manually clean the wall scraping components.

[0006] 3. This multi-level composite stirring high-efficiency esterification reactor eliminates the need for manual bolt tightening or manual pressing of the cover plate for sealing. It relies on cylinder drive to complete the sealing of the feed inlet, eliminating the need for personnel to operate the feed inlet at close range. Since most esterification raw materials are corrosive or volatile, this reduces workers' close contact with the raw materials and avoids chemical contact damage. At the same time, it eliminates the need for manual tightening of fasteners, saving manual operation time before and after feeding.

[0007] 4. In this multi-level composite stirring high-efficiency esterification reactor, the second spring is compressed during the cylinder's downward pressurization. The pre-tightening force generated by the spring ensures that the sealing block remains tightly attached to the positioning groove, and the sealing element is tightly fitted to the end face of the feed pipe. Even if vibration occurs inside the reactor during equipment operation, the sealing block can still fit the positioning groove due to the spring's buffering effect, preventing gaps in the sealing position, avoiding gas leakage from the reactor or outside air entering the reactor, and preventing the raw materials from being oxidized.

[0008] 5. This multi-level composite stirring high-efficiency esterification reactor completes the first cleaning during the feeding and sealing pressure stage, and achieves secondary scraping during the lifting of the cover plate. Compared with structures that only perform a single cleaning, it can more thoroughly remove viscous acid and alcohol raw materials adhering to the pipe wall, preventing residual raw materials from remaining in the feed pipe for a long time and aging and deteriorating. The raw materials adhering to the inner wall of the feed pipe are scraped off and enter the reactor body to participate in the esterification reaction, avoiding the inability to use viscous raw materials adhering to the pipe wall, reducing raw material loss, and preventing cross-contamination of raw materials between different batches of production.

[0009] 6. In this multi-level composite stirring high-efficiency esterification reactor, when the cleaning rack is in contact with the pipe wall, the third spring is stretched. The spring adaptively adjusts the clamping force to avoid the rigid extrusion of the cleaning rack that scratches the pipe wall. After the cleaning rack is removed from the feed pipe, the spring returns to its original position and drives the impact block to strike the bottom of the cleaning shaft, generating vibration to shake off the stubborn viscous material on the cleaning rack. This prevents the resin from solidifying and adhering to the cleaning rack, and prevents the pipe wall from being scratched again when the accumulated material on the cleaning rack hardens. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the multi-level composite stirred high-efficiency esterification reactor of the present invention; Figure 2 This is an axonometric view of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a schematic diagram of the contact component of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point A; Figure 6 This is a schematic diagram of the feeding component of the present invention; Figure 7 This is a schematic diagram of the sealing mechanism of the present invention; Figure 8 This is a schematic diagram of the cleaning mechanism of the present invention.

[0011] In the diagram: 1. Kettle body; 2. Drive component; 4. Feeding component; 41. Feeding pipe; 42. Positioning groove; 43. Fixing frame; 44. Connecting shaft; 45. Cylinder; 46. Sealing mechanism; 461. Sealing cover plate; 462. Sealing element; 463. Connecting rod; 464. Sealing block; 465. Second spring; 47. Cleaning mechanism; 471. Connecting frame; 472. Cleaning shaft; 473. Cleaning frame; 474. Round shaft; 475. Guide frame; 476. Cross; 477. Impact block; 478. Third spring; 48. Top plate; 5. Discharge valve; 6. Mixing shaft; 7. Support; 8. Defoamer; 9. Contact component; 91. Contact frame; 92. Contact shell; 93. Contact plate; 94. Sliding shaft; 95. Baffle; 96. First spring; 10. Stirring paddle. Detailed Implementation

[0012] Please see Figures 1-3 This invention provides a multi-level composite stirred high-efficiency esterification reactor, comprising: The top of the vessel body 1 is fixedly connected to the feeding component 4. First, acidic raw materials, alcoholic raw materials and catalysts are fed into the reactor through the feeding component 4 according to the ratio. Then, the feeding port is sealed to ensure that the inside of the vessel body 1 is sealed. A drive component 2 is fixedly connected to the middle of the top of the vessel body 1, and a bracket 7 is fixedly connected to the inner side of the vessel body 1. A mixing shaft 6 is rotatably set on the top of the bracket 7. An agitator 10 is fixedly connected to the side of the mixing shaft 6. The top of the mixing shaft 6 is fixedly connected to the output end of the drive component 2. The jacket heating system is started to slowly heat the material. At the same time, the drive component 2 at the top of the vessel body 1 is turned on. The drive component 2 drives the mixing shaft 6 to rotate on the top of the bracket 7, thereby driving the agitators 10 of each layer to operate synchronously. The upper stirring paddle 10 disperses the surface material, the middle stirring paddle 10 stirs the raw material in the middle of the vessel 1, and the lower stirring paddle 10 pushes the material at the bottom of the vessel to flow upward, thereby balancing the overall temperature inside the vessel, avoiding local overheating, and reducing the adhesion of viscous materials to the vessel wall and causing coking. A defoamer 8 is fixedly connected to the side of the mixing shaft 6. During the esterification reaction stage, the negative pressure dehydration condition easily generates a large amount of foam. The defoamer 8 relies on high-speed mechanical shearing to break up the foam, causing the liquid material to fall back into the kettle. A discharge valve 5 is fixedly connected to the bottom of the vessel body 1, and a contact component 9 is fixedly connected to the side of the mixing shaft 6. After the material drops to the safe discharge temperature, the stirring stops, the discharge valve 5 is opened to discharge the finished material, and the drive component 2 is started again after the discharge is completed, driving the mixing shaft 6 to rotate at high speed. The inner wall of the vessel body 1 is wiped by the contact component 9 on the mixing shaft 6 to complete the internal cleaning operation of the vessel body 1. Example 1, please refer to Figures 4-5 The present invention also includes a contact component 9 and a contact frame 91 sleeved on the side of the mixing shaft 6. After the material is discharged from the vessel body 1 through the discharge valve 5, the drive component 2 is started to drive the mixing shaft 6 to rotate in the inner cavity of the vessel body 1. The mixing shaft 6 drives the contact frame 91 to rotate together, so that the upper and lower ends of the contact frame 91 are in contact with the upper and lower arc surfaces of the inner cavity of the vessel body 1 to make a rotary motion, thus initially cleaning the inner wall of the vessel body 1. Both sides of the contact frame 91 are fixedly connected to the contact housing 92 and the contact plate 93 is slidably connected to the inner side of the contact housing 92. During the rotation of the support 7 inside the reactor, the contact housing 92 on both sides of the contact frame 91 drives the contact plate 93 to rotate and scrape the material against the inner wall of the reactor body 1. Sliding shafts 94 are evenly arranged on the side of the contact plate 93. One end of the sliding shaft 94 is fixedly connected to the contact plate 93, and the other end of the sliding shaft 94 is fixedly connected to a baffle 95. The side of the baffle 95 is slidably connected to the inner side of the contact housing 92. The side of the sliding shaft 94 is slidably connected to the inner side of the contact housing 92. A first spring 96 is sleeved on the sliding shaft 94. The contact plate 93 is installed inside the contact housing 92 by means of the sliding shaft 94. The sliding shaft 94 is matched with the baffle 95 and the first spring 96. When the contact plate 93 is in contact with the vessel wall, the vessel wall generates a reaction force on the contact plate 93. The sliding shaft 94 squeezes the first spring 96. The spring buffer is used to achieve flexible contact and prevent the contact plate 93 from scratching the inner wall of the vessel 1 due to excessive pressing force. One end of the first spring 96 is fixedly connected to the inner side of the contact housing 92, and the other end of the first spring 96 is fixedly connected to the baffle 95. At the same time, the subsequent drive component 2 drives the mixing shaft 6 to rotate at high speed, using centrifugal force to throw out the residual material on the contact frame 91 and the contact plate 93, further completing the self-cleaning process, causing the contact plate 93 to slide relative to the contact housing 92. After the cleaning work is completed, the contact plate 93 retracts and moves into the contact housing 92, and the inner wall of the contact housing 92 then scrapes off the residual material adhering to the surface of the contact plate 93, preventing the material from accumulating on the contact plate 93 and affecting the subsequent cleaning effect. Example 2, please refer to Figure 6 The present invention also includes a feeding component 4, after which the raw material is transported into the interior of the vessel body 1 via the feeding pipe 41 and the feeding pipe 41 is sealed. The system includes a feed pipe 41 fixedly connected to the top of the inner cavity of the vessel body 1, and an annular positioning groove 42 is provided on the top of the feed pipe 41. A fixing frame 43 is fixedly connected to the side of the feed pipe 41, a connecting shaft 44 is fixedly connected to the top of the fixing frame 43, a top plate 48 is fixedly connected to the top of the connecting shaft 44, and a cylinder 45 is fixedly connected to the top of the top plate 48. When the cylinder 45 is activated, the output end of the cylinder 45 pushes the sealing mechanism 46 to slide down along the connecting shaft 44, so that the sealing mechanism 46 fits tightly with the positioning groove 42 at the top of the feed pipe 41 to complete the sealing. It also includes a sealing mechanism 46 fixedly connected to the output end of the cylinder 45. A cleaning mechanism 47 is fixedly connected to the bottom of the sealing mechanism 46. During the downward movement of the sealing mechanism 46, the cleaning mechanism 47 is simultaneously driven to slide along the inside of the feed pipe 41. The cleaning mechanism 47 is used to complete the scraping and cleaning operation of the inner wall of the feed pipe 41. Please see Figure 7 The present invention also includes a sealing mechanism 46, a sealing cover plate 461 and a feed pipe 41 are concentrically arranged, and a sealing element 462 is fixedly connected to the bottom of the sealing cover plate 461. When the feed pipe 41 is sealed, the output end of the cylinder 45 pushes the sealing cover plate 461 to move downward toward the feed pipe 41, and the sealing cover plate 461 drives the lower sealing element 462 to extend into the feed pipe 41. The sealing block 464 at the bottom of the sealing cover plate 461 enters the positioning groove 42 at the top of the feed pipe 41; Connecting rods 463 are evenly arranged on the inner side of the sealing cover plate 461. The top of the connecting rods 463 is slidably connected to the inner side of the sealing cover plate 461, and a sealing block 464 is fixedly connected to the bottom of the connecting rods 463. The side of the sealing block 464 is slidably connected to the inner side of the sealing cover plate 461. A second spring 465 is sleeved on the connecting rods 463. The top of the second spring 465 is fixedly connected to the inner side of the sealing cover plate 461, and the bottom of the second spring 465 is fixedly connected to the top of the sealing block 464. When the cylinder 45 continues to press down on the sealing cover plate 461, the sealing block 464 is subjected to the reaction force of the positioning groove 42, which causes the connecting rod 463 to slide inside the sealing cover plate 461 and compress the second spring 465 on the outside of the connecting rod 463, so that the sealing block 464 is always in close contact with the positioning groove 42. When the lower end face of the sealing cover plate 461 presses against the upper end face of the feed pipe 41, the sealing element 462 seals the opening of the feed pipe 41, and at the same time, the sealing block 464 presses against the positioning groove 42. The feed pipe 41 is sealed by the continuous pressing force of the cylinder 45, eliminating the need for manual pressing and sealing. Please see Figure 8 The present invention also includes a cleaning mechanism 47, the top of the connecting frame 471 is fixedly connected to the bottom of the sealing block 464, the inner side of the connecting frame 471 is fixedly connected to a cleaning shaft 472, and the middle of the cleaning shaft 472 is slidably connected to a cleaning frame 473. During the process of the cylinder 45 output end pushing the sealing cover plate 461 and the sealing element 462 to move downward, the sealing element 462 drives the connecting frame 471 and the cleaning shaft 472 to move downward together, and the cleaning shaft 472 drives the cleaning frame 473 to slide downward against the inner wall of the feed pipe 41 to scrape off the raw materials adhering to the inner wall of the pipe during the feeding stage. Third springs 478 are fitted on both the upper and lower sides of the cleaning shaft 472. The top of the upper third spring 478 is fixedly connected to the bottom of the connecting frame 471 and the top of the cleaning frame 473. The top of the lower third spring 478 is fixedly connected to the bottom of the cleaning frame 473 and the bottom of the guide frame 475. During the downward movement of the cleaning frame 473, the third spring 478 fitted on the outside of the cleaning shaft 472 is stretched. The spring force plays a buffering role to prevent the cleaning frame 473 from pressing too hard and damaging the inner wall of the feed pipe 41. A guide frame 475 is fixedly connected to the side of the cleaning shaft 472. Round shafts 474 are evenly distributed at the bottom of the cleaning frame 473. The side of the round shafts 474 is slidably connected to the inner side of the guide frame 475. The top of the round shafts 474 is fixedly connected to the bottom of the cleaning frame 473. A cross 476 is fixedly connected to the bottom of the round shafts 474. An impact block 477 is fixedly connected to the inner side of the cross 476. The impact block 477 is concentrically arranged with the cleaning shaft 472. When the sealing cover 461 is opened, the cylinder 45 drives the sealing cover 461. 1. The material is lifted upward and disengaged from the feed pipe 41. The seal 462 drives the cleaning shaft 472 and the cleaning frame 473 to slide upward via the connecting frame 471, completing the secondary scraping and cleaning of the feed pipe 41 wall. During the contact and friction between the cleaning frame 473 and the pipe wall, the cleaning frame 473 pushes the guide frame 475 to slide downward relative to the cleaning shaft 472 by the bottom round shaft 474, and continues to stretch the third spring 478 at the lower end of the cleaning shaft 472. The cross 476 and the impact block 477 at the bottom of the cleaning shaft 472 move downward accordingly. When the cleaning frame 473 is completely removed from the feed pipe 41 along with the sealing cover plate 461, the upper and lower third springs 478 reset and retract, pulling the cleaning frame 473 upward in the opposite direction. The cleaning frame 473 drives the cross 476 and the impact block 477 to impact the bottom of the cleaning shaft 472 upward through the round shaft 474. The vibration generated by the impact shakes off the residual material on the surface of the cleaning frame 473, preventing the material from adhering and accumulating for a long time. Specific workflow: First, acidic raw materials, alcoholic raw materials and catalysts are fed into the reactor through the feed component 4 according to the ratio, and then the feed port is sealed to ensure that the inside of the reactor body 1 is sealed. Start the jacket heating system to slowly heat up the material. At the same time, turn on the drive component 2 at the top of the vessel 1. The drive component 2 drives the mixing shaft 6 to rotate on the top of the support 7, thereby driving the stirring paddles 10 of each layer to operate synchronously. The upper stirring paddle 10 disperses the surface material, the middle stirring paddle 10 stirs the raw material in the middle of the vessel 1, and the lower stirring paddle 10 pushes the material at the bottom of the vessel to flow upward, thereby balancing the overall temperature inside the vessel, avoiding local overheating, and reducing the adhesion of viscous materials to the vessel wall and causing coking. During the esterification reaction stage, the negative pressure dehydration condition is prone to generating a large amount of foam. Defoamer 8 relies on high-speed mechanical shearing to break up the foam, causing the liquid material to fall back into the kettle. Under the continuous action of multi-layer stirring, the materials are fully mixed. When the temperature inside the vessel reaches the set temperature for the esterification reaction, the acid and alcohol undergo an esterification reaction. Layered stirring promotes the formation of an upper and lower circulating flow field, enhances heat transfer efficiency, increases the probability of molecular collisions, and accelerates the esterification reaction rate. After the esterification reaction is completed, the heating system is turned off, and cooling medium is introduced into the jacket to cool down. The stirring paddle 10 runs at low speed to ensure uniform cooling of the material. After the material drops to the safe discharge temperature, stop stirring, open the discharge valve 5 to discharge the finished material, and after the discharge is completed, start the drive component 2 again to drive the mixing shaft 6 to rotate at high speed. Use the contact component 9 on the mixing shaft 6 to wipe the inner wall of the reactor body 1 to complete the internal cleaning operation of the reactor body 1. After the material is discharged from the vessel 1 through the discharge valve 5, the drive component 2 is started to drive the mixing shaft 6 to rotate in the inner cavity of the vessel 1. The mixing shaft 6 drives the contact frame 91 to rotate together, so that the upper and lower ends of the contact frame 91 are in contact with the upper and lower arc surfaces of the inner cavity of the vessel 1 to make a rotary motion, thus initially cleaning the inner wall of the vessel 1. During the rotation of the support 7 inside the reactor, the contact frame 91 drives the contact plate 93 to rotate and scrape the material against the inner wall of the reactor body 1 through the contact shell 92 on both sides of the contact frame 91. The contact plate 93 is installed inside the contact housing 92 by means of the sliding shaft 94. The sliding shaft 94 is equipped with a baffle 95 and a first spring 96. When the contact plate 93 is in contact with the vessel wall, the vessel wall generates a reaction force on the contact plate 93. The sliding shaft 94 squeezes the first spring 96. The spring buffer is used to achieve flexible contact and prevent the contact plate 93 from being too strong and scratching the inner wall of the vessel body 1. Meanwhile, the subsequent drive component 2 drives the mixing shaft 6 to rotate at high speed, using centrifugal force to throw out the residual material on the contact frame 91 and contact plate 93, further completing the self-cleaning process. This causes the contact plate 93 to slide relative to the contact housing 92. After the cleaning work is completed, the contact plate 93 retracts and moves into the contact housing 92. The inner wall of the contact housing 92 then scrapes off the residual material adhering to the surface of the contact plate 93, preventing the material from accumulating on the contact plate 93 and affecting the subsequent cleaning effect. After the raw materials are transported into the vessel body 1 through the feed pipe 41, the feed pipe 41 is sealed. When the cylinder 45 is activated, the output end of the cylinder 45 pushes the sealing mechanism 46 to slide down along the connecting shaft 44, so that the sealing mechanism 46 fits tightly with the positioning groove 42 at the top of the feed pipe 41, thus completing the sealing. During the downward movement of the sealing mechanism 46, the cleaning mechanism 47 is simultaneously driven to slide along the inside of the feed pipe 41, and the scraping and cleaning operation of the inner wall of the feed pipe 41 is completed by the cleaning mechanism 47. When performing the sealing operation of the feed pipe 41, the output end of the cylinder 45 pushes the sealing cover plate 461 to move downward toward the feed pipe 41, and the sealing cover plate 461 drives the lower sealing element 462 to extend into the feed pipe 41. The sealing block 464 at the bottom of the sealing cover plate 461 enters the positioning groove 42 at the top of the feed pipe 41; The cylinder 45 continues to press down the sealing cover plate 461. The sealing block 464 is subjected to the reaction force of the positioning groove 42, which causes the connecting rod 463 to slide inside the sealing cover plate 461 and compress the second spring 465 on the outside of the connecting rod 463, so that the sealing block 464 is always in close contact with the positioning groove 42. When the lower end face of the sealing cover plate 461 presses against the upper end face of the feed pipe 41, the sealing element 462 seals the opening of the feed pipe 41, and at the same time, the sealing block 464 presses against the positioning groove 42. The feed pipe 41 is sealed by the continuous pressing force of the cylinder 45, eliminating the need for manual pressing and sealing. During the process of the cylinder 45 output end pushing the sealing cover plate 461 and the sealing element 462 to move downward, the sealing element 462 drives the connecting frame 471 and the cleaning shaft 472 to move downward together, and the cleaning shaft 472 drives the cleaning frame 473 to slide downward against the inner wall of the feed pipe 41 to scrape off the raw materials that adhered to the inner side of the pipe wall during the feeding stage. During the downward movement of the cleaning frame 473, the third spring 478, which is sleeved on the outside of the cleaning shaft 472, is stretched. The spring force plays a buffering role to prevent the cleaning frame 473 from pressing too hard and damaging the inner wall of the feed pipe 41. When the sealing cover 461 is opened, the cylinder 45 drives the sealing cover 461 to rise and disengage from the feed pipe 41. The seal 462 drives the cleaning shaft 472 and the cleaning frame 473 to slide upward via the connecting frame 471, completing the secondary scraping and cleaning of the feed pipe 41 wall. During the contact and friction between the cleaning frame 473 and the pipe wall, the cleaning frame 473 pushes the guide frame 475 to slide downward relative to the cleaning shaft 472 by the bottom round shaft 474, and continues to stretch the third spring 478 at the lower end of the cleaning shaft 472. The cross 476 and the impact block 477 at the bottom of the cleaning shaft 472 move downward accordingly. When the cleaning frame 473 is completely removed from the feed pipe 41 along with the sealing cover plate 461, the upper and lower third springs 478 reset and retract, pulling the cleaning frame 473 upward in the opposite direction. The cleaning frame 473 drives the cross 476 and the impact block 477 to impact the bottom of the cleaning shaft 472 upward through the round shaft 474. The vibration generated by the impact shakes off the residual material on the surface of the cleaning frame 473, preventing the material from adhering and accumulating for a long time.

[0013] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A multi-level composite stirred high-efficiency esterification reactor, characterized in that, include: The vessel body has a drive component fixedly connected to the middle of its top, a feeding component fixedly connected to the top of the vessel body, a discharge valve fixedly connected to the bottom of the vessel body, and a support fixedly connected to the inner side of the vessel body. It also includes a mixing shaft rotatably mounted on the top of the support, a stirring paddle fixedly connected to the side of the mixing shaft, the top of the mixing shaft fixedly connected to the output end of the drive component, a defoamer fixedly connected to the side of the mixing shaft, and a contact component fixedly connected to the side of the mixing shaft. The contact component includes: A contact frame is sleeved on the side of the mixing shaft, and a contact shell is fixedly connected to both sides of the contact frame; The contact plate is slidably connected to the inner side of the contact housing. Sliding shafts are evenly arranged on the side of the contact plate. One end of the sliding shaft is fixedly connected to the contact plate, and the other end of the sliding shaft is fixedly connected to a baffle. A first spring is sleeved on the sliding shaft.

2. The multi-level composite stirred high-efficiency esterification reactor according to claim 1, characterized in that, The feeding component includes: A feed pipe is fixedly connected to the top of the inner cavity of the vessel, and an annular positioning groove is provided on the top of the feed pipe. A fixing frame is fixedly connected to the side of the feed pipe, a connecting shaft is fixedly connected to the top of the fixing frame, a top plate is fixedly connected to the top of the connecting shaft, and a cylinder is fixedly connected to the top of the top plate. It also includes a sealing mechanism fixedly connected to the cylinder output end, and a cleaning mechanism is fixedly connected to the bottom of the sealing mechanism.

3. The multi-level composite stirred high-efficiency esterification reactor according to claim 1, characterized in that: The side of the sliding shaft is slidably connected to the inner side of the contact housing, and the side of the baffle is slidably connected to the inner side of the contact housing.

4. The multi-level composite stirred high-efficiency esterification reactor according to claim 1, characterized in that: One end of the first spring is fixedly connected to the inner side of the contact housing, and the other end of the first spring is fixedly connected to the baffle.

5. The multi-level composite stirred high-efficiency esterification reactor according to claim 2, characterized in that: The sealing mechanism includes a sealing cover plate, a sealing element fixedly connected to the bottom of the sealing cover plate, connecting rods evenly arranged on the inner side of the sealing cover plate, the top of the connecting rods slidably connected to the inner side of the sealing cover plate, a sealing block fixedly connected to the bottom of the connecting rods, and a second spring sleeved on the connecting rods.

6. The multi-level composite stirred high-efficiency esterification reactor according to claim 5, characterized in that: The side of the sealing block is slidably connected to the inside of the sealing cover plate, the sealing cover plate is concentrically arranged with the feed pipe, the top of the second spring is fixedly connected to the inside of the sealing cover plate, and the bottom of the second spring is fixedly connected to the top of the sealing block.

7. The multi-level composite stirred high-efficiency esterification reactor according to claim 2, characterized in that: The cleaning mechanism includes a connecting frame, the top of which is fixedly connected to the bottom of the sealing block. A cleaning shaft is fixedly connected to the inner side of the connecting frame. A cleaning frame is slidably connected to the middle of the cleaning shaft. A guide frame is fixedly connected to the side of the cleaning shaft. A third spring is sleeved on both the upper and lower sides of the cleaning shaft. Round shafts are evenly arranged at the bottom of the cleaning frame. The top of the round shafts is fixedly connected to the bottom of the cleaning frame. A cross is fixedly connected to the bottom of the round shafts. An impact block is fixedly connected to the inner side of the cross.

8. The multi-level composite stirred high-efficiency esterification reactor according to claim 7, characterized in that: The impact block is concentrically arranged with the cleaning shaft, and the side of the circular shaft is slidably connected to the inner side of the guide frame.

9. The multi-level composite stirred high-efficiency esterification reactor according to claim 8, characterized in that: The top of the third spring located above is fixedly connected to the bottom of the connecting frame, and the top of the third spring is fixedly connected to the top of the cleaning frame. The top of the third spring located below is fixedly connected to the bottom of the cleaning frame, and the bottom of the third spring is fixedly connected to the top of the guide frame.

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