Polymerization reaction kettle for high-efficiency refining treatment of polyether polyol with high EO content

Abstract

The utility model discloses a polymerization reaction kettle for high-efficiency refining treatment of polyether polyol with high EO content, which comprises a reaction kettle, a separation tank and a purification tank, the reaction kettle is provided with a stirring structure, a heating device and a circulating feeding structure, and full mixing, accurate temperature control and circulating reaction of materials are realized; a centrifugal separator is arranged in the separation tank, the purification tank is provided with an adsorbent layer and a distillation device, and product separation and purification can be completed in sequence; the electric three-way valve controls the flow direction of materials, and the containers realize material transmission through connecting pipelines; meanwhile, the equipment is provided with a pressure relief opening and a safety valve to guarantee operation safety, and a bottom sewage draining opening is convenient to maintain. The polymerization reaction kettle solves the problems of non-uniform material mixing, low refining efficiency, poor safety and the like of the existing equipment through multi-structure collaboration, realizes efficient production and refining treatment of polyether polyol with high EO content, is coherent in material treatment flow and high in equipment practicability, and can meet the requirements of large-scale industrial production.

Description

Technical Field

[0001] This utility model relates to the field of polymerization reaction equipment technology, specifically a polymerization reactor for efficient purification of high EO content polyether polyols. Background Technology

[0002] Polyether polyols are important raw materials for the production of polymer materials such as polyurethane. With the development of the industry, the demand for polyether polyols with high EO (ethylene oxide) content is increasing. In the production process of high EO content polyether polyols, the polymerization reactor is a key piece of equipment.

[0003] However, existing polymerization reactors have several problems when processing high-EO-content polyether polyols: 1. Existing polymerization reactors use a single material mixing method, making it difficult to achieve comprehensive and uniform mixing. This leads to low reaction efficiency, incomplete reaction, large fluctuations in product quality, and an inability to consistently produce high-quality polyether polyols; 2. After the reaction, the purification process for the product is cumbersome, and the separation and purification methods are outdated. It is difficult to process the reaction products quickly and efficiently, failing to meet the efficiency requirements of large-scale industrial production; 3. Existing polymerization reactors lack an effective material circulation structure, making it difficult to fully recycle materials within the reactor. This results in incomplete reaction of some materials, causing raw material waste and affecting the overall reaction efficiency and product quality improvement.

[0004] Therefore, it is necessary to design a polymerization reactor for efficient purification of polyether polyols with high EO content to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide a polymerization reactor for the efficient purification of polyether polyols with high EO content, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A polymerization reactor for high-EO content polyether polyol efficient purification includes a reactor, a separation tank, and a purification tank. End caps are fixedly installed on the top of each reactor, separation tank, and purification tank. A first inlet, a second inlet, and a third inlet are respectively provided on one side of the top of each end cap. A stirring structure is provided inside the reactor. A heating device is also provided at the lower part of the reactor's interior. A circulating feeding structure is provided at one end of the reactor's exterior. The reactor discharges material from the bottom. An electric three-way valve is installed at one end of the separation tank. The output end of the electric three-way valve is connected to a first discharge port and a circulating feeding structure end, respectively. A centrifugal separator is installed inside the separation tank. A first discharge pump is installed at the bottom discharge end of the separation tank. A second discharge port is connected to the bottom of the first discharge pump. An adsorbent layer is installed above the interior of the purification tank. A distillation device is installed below the adsorbent layer inside the purification tank. A second discharge pump is installed at the bottom discharge end of the purification tank. A third discharge port is also provided at the bottom of the second discharge pump.

[0008] As a preferred embodiment of this utility model, the stirring structure includes a stirring motor fixedly installed on the top end cover of the reactor. The bottom output end of the stirring motor is keyed to a rotating shaft. Several stirring blades are fixedly installed around the rotating shaft. The bottom of the rotating shaft is rotatably connected to the bottom of the reactor interior through a bearing.

[0009] As a preferred embodiment of this utility model, the circulating feeding structure includes a circulating pump body fixedly installed on the outer shell of the reactor, the input end of the circulating pump body is fixedly connected to a circulating pipeline inlet pipe, and the output end of the circulating pump body is fixedly connected to a circulating pipeline outlet pipe.

[0010] As a preferred embodiment of this utility model, the side of the inlet pipe of the circulation pipeline away from the circulation pump body is fixedly connected to the output end of the electric three-way valve, and the side of the outlet pipe of the circulation pipeline away from the circulation pump body is fixedly connected to and communicates with the upper interior of the reaction vessel.

[0011] As a preferred embodiment of this utility model, a first connecting pipe is fixedly connected between the first discharge port at the bottom of the reactor and the second inlet at the top of the separation tank, and a second connecting pipe is fixedly connected between the second discharge port and the third inlet at the top of the purification tank.

[0012] As a preferred embodiment of this utility model, the reaction vessel, separation tank and purification tank are also provided with pressure relief ports, and safety valves are installed on the pressure relief ports.

[0013] As a preferred embodiment of this utility model, the bottom of the reaction vessel, separation tank and purification tank are also provided with a drain outlet.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention utilizes a polymerization reactor for the efficient purification of high-EO-content polyether polyols, achieving the following effects: 1. The reactor incorporates a stirring structure, with a stirring motor driving a rotating shaft and stirring blades, ensuring uniform mixing of materials throughout the reactor. Compared to existing technologies, this significantly improves reaction efficiency, ensuring a more complete reaction and stable product quality, resulting in consistently high-quality high-EO-content polyether polyols. 2. By incorporating a separation tank and a purification tank, equipped with a centrifuge, adsorbent layer, and distillation device, an integrated purification system is formed. Compared to existing technologies, this system achieves rapid and efficient separation and purification of reaction products, greatly improving purification efficiency and meeting the needs of large-scale industrial production. 3. The reactor features a circulating feeding structure, utilizing a circulating pump, inlet pipe, and outlet pipe to achieve cyclical transport of materials within the reactor. Compared to existing technologies, this system allows materials to participate in the reaction multiple times, improving the completeness of the reaction, reducing raw material waste, and further enhancing overall reaction efficiency and product quality. 4. Pressure relief ports and safety valves are installed on the reaction vessels, separation tanks, and purification tanks, automatically releasing pressure when the internal pressure exceeds a set value. Compared to existing technologies, this effectively prevents equipment damage or explosions due to excessive pressure, further improving the safety and reliability of equipment operation. 5. Drainage ports are installed at the bottom of the reaction vessels, separation tanks, and purification tanks, facilitating equipment cleaning, maintenance, and residual material disposal. Compared to existing technologies, this reduces equipment maintenance difficulty, promotes long-term stable operation, and extends equipment lifespan. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the reactor, separation tank and purification tank of this utility model when connected.

[0017] Figure 2 This is a schematic diagram of the internal structure of the reaction vessel, separation tank, and purification tank of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the reaction vessel of this utility model.

[0019] In the diagram: 1. Reactor; 2. Separator; 3. Purification tank; 4. End cap; 5. First feed inlet; 6. First discharge outlet; 7. Second feed inlet; 8. Third feed inlet; 9. Stirring structure; 91. Stirring motor; 92. Rotating shaft; 93. Stirring blade; 10. Circulating feeding structure; 101. Circulating pump body; 102. Circulating pipeline inlet; 103. Circulating pipeline outlet; 11. Electric three-way valve; 12. Centrifuge; 13. First discharge pump; 14. Second discharge outlet; 15. Adsorbent layer; 16. Distillation device; 17. Second discharge pump; 18. Third discharge outlet; 19. First connecting pipeline; 20. Second connecting pipeline; 21. Pressure relief port; 22. Drainage port; 23. Heating device. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are provided. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0022] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] For examples, please refer to Figure 1-3 This utility model provides a technical solution:

[0025] A polymerization reactor for high-EO content polyether polyol efficient purification includes a reactor 1, a separation tank 2, and a purification tank 3. End caps 4 are fixedly installed on the top of the reactor 1, separation tank 2, and purification tank 3. A first feed inlet 5, a second feed inlet 7, and a third feed inlet 8 are respectively provided on one side of the top of the end caps 4 on the reactor 1, separation tank 2, and purification tank 3. A stirring structure 9 is provided inside the reactor 1. A heating device 23 is also provided at the lower part of the reactor 1. During the reaction, the heating device 23 is activated according to the reaction requirements to heat the materials in the reactor 1 and maintain the required reaction temperature. A circulating feeding structure 10 is provided at one end of the reactor 1. An electric three-way valve 11 is installed at the bottom discharge end of the reactor 1. The output end of the electric three-way valve 11 is connected to the first discharge inlet 6 and the circulating feed inlet 7. The ring feeding structure 10 has a centrifugal separator 12 inside the separation tank 2. A first feed pump 13 is installed at the bottom of the separation tank 2, and a second feed port 14 is connected to the bottom of the first feed pump 13. An adsorbent layer 15 is installed above the interior of the purification tank 3, and a distillation device 16 is installed below the adsorbent layer 15 inside the purification tank 3. A second feed pump 17 is installed at the bottom of the purification tank 3, and a third feed port 18 is also provided at the bottom of the second feed pump 17. Before the reaction starts, raw materials are added to the reactor 1 through the first feed port 5. After the reaction is completed, the material in the reactor 1 enters the second feed port 7 of the separation tank 2 through the electric three-way valve 11, the first feed port 6, and the first connecting pipe 19. The material processed by the separation tank 2 then enters the third feed port 8 of the purification tank 3 through the second feed port 14 and the second connecting pipe 20.

[0026] Specifically, the stirring structure 9 includes a stirring motor 91 fixedly installed on the top end cover 4 of the reactor 1. The bottom output end of the stirring motor 91 is keyed to a rotating shaft 92. Several stirring blades 93 are fixedly installed on the periphery of the rotating shaft 92. The bottom of the rotating shaft 92 is rotatably connected to the bottom of the reactor 1 through a bearing. When the stirring motor 91 is started, the rotating shaft 92 is driven to rotate. The stirring blades 93 on the rotating shaft 92 stir the materials in the reactor 1. The rotation of the stirring blades 93 makes the materials fully mixed, accelerates the reaction process, improves the reaction uniformity, and thus improves the reaction quality and stability of high EO content polyether polyol.

[0027] Specifically, the circulating feeding structure 10 includes a circulating pump body 101 fixedly installed on the outer shell of the reactor 1. The input end of the circulating pump body 101 is fixedly connected to a circulating pipe inlet pipe 102, and the output end of the circulating pump body 101 is fixedly connected to a circulating pipe outlet pipe 103. The side of the circulating pipe inlet pipe 102 away from the circulating pump body 101 is fixedly connected to the output end of the electric three-way valve 11, and the side of the circulating pipe outlet pipe 103 away from the circulating pump body 101 is fixedly connected and connected to the upper interior of the reactor 1. The electric three-way valve 11 controls the material flow direction. Some material enters the circulating pump body 101 through the circulating pipe inlet pipe 102 and is then sent back to the upper interior of the reactor 1 through the circulating pipe outlet pipe 103, realizing material circulation. This promotes the material to participate in the reaction multiple times in the reactor 1, improves the utilization rate of the material and the degree of reaction, reduces raw material waste, and further improves reaction efficiency and product quality.

[0028] Specifically, a first connecting pipe 19 is fixedly connected between the first discharge port 6 at the bottom of the reactor 1 and the second inlet port 7 at the top of the separation tank 2, and a second connecting pipe 20 is fixedly connected between the second discharge port 14 and the third inlet port 8 at the top of the purification tank 3. After the material enters the separation tank 2, the centrifuge 12 centrifuges the material. The separated material is then transported to the purification tank 3 through the first discharge pump 13 and the second discharge port 14, which quickly separates the different components in the reaction product, providing a good foundation for subsequent purification steps, improving the efficiency of refining, and ensuring product purity. The separated material enters the purification tank 3, where it first adsorbs impurities through the adsorbent layer 15, then distills and purifies it through the distillation device 16, and finally outputs the finished product through the second discharge pump 17 and the third discharge port 18. Through the dual action of adsorption and distillation, impurities are deeply removed, and high-purity polyether polyol with high EO content is obtained, meeting the strict requirements of industrial production for product quality.

[0029] Specifically, the reactor 1, the separation tank 2, and the purification tank 3 are also equipped with pressure relief ports 21, and safety valves are installed on the pressure relief ports 21. When the internal pressure of the reactor 1, the separation tank 2, or the purification tank 3 exceeds the set value of the safety valve, the safety valve will automatically open and release the pressure through the pressure relief port 21. This prevents the equipment from being damaged due to excessive internal pressure, avoids safety accidents such as explosions, ensures the safety of equipment and personnel, and ensures stable production operation.

[0030] Specifically, the bottom of the reactor 1, the separation tank 2, and the purification tank 3 are also equipped with drain ports 22; when the equipment is maintained, cleaned, or when residual materials need to be disposed of, the drain ports 22 can be opened to discharge the impurities and residual materials at the bottom of the reactor 1, the separation tank 2, and the purification tank 3; this facilitates equipment cleaning and maintenance, prevents residual materials from affecting equipment performance and subsequent production, extends the service life of the equipment, and reduces maintenance costs.

[0031] The working process of this utility model is as follows: When using the polymerization reactor for high-EO content polyether polyol high-efficiency purification, the raw materials are first fed into the reactor 1 through the first feed port 5 on the top end cover 4 of the reactor 1. Then, the stirring structure 9 is started, and the stirring motor 91 drives the rotating shaft 92 and stirring blades 93 to rotate, stirring the materials in the reactor 1 to ensure thorough mixing. At the same time, the heating device 23 located at the lower part of the reactor 1 is started to heat the materials in the reactor 1 to a suitable temperature to promote the reaction. The circulating feeding structure 10 is used, and the circulating pump 101 draws materials from the electric three-way valve 11 through the circulating pipe inlet pipe 102, and then sends the materials back to the upper part of the reactor 1 through the circulating pipe outlet pipe 103 to realize material circulation and improve the degree of reaction. After the reaction is completed, the electric three-way valve 11 is controlled to allow the materials in the reactor 1 to pass through the first discharge port 6 and the first connecting pipe 19, and then through the separation... The material enters the separation tank 2 through the second feed port 7 on the top end cover 4 of tank 2. The centrifuge 12 inside the separation tank 2 is started to centrifuge and separate the material. After separation, the first discharge pump 13 is started to output the separated material through the second discharge port 14. The separated material enters the purification tank 3 through the second connecting pipe 20 and the third feed port 8 on the top end cover 4 of purification tank 3. The material first passes through the adsorbent layer 15 at the top of the purification tank 3 to adsorb impurities, and then passes through the distillation device 16 below the adsorbent layer 15 for distillation and purification. After purification, the second discharge pump 17 is started to output the finished product through the third discharge port 18. During the whole process, if the pressure in the reactor 1, separation tank 2 or purification tank 3 is too high, the safety valve on the pressure relief port 21 will automatically open to relieve pressure and ensure equipment safety. Impurities and residual materials are discharged periodically through the drain port 22 at the bottom of the reactor 1, separation tank 2 and purification tank 3 for equipment maintenance.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polymerization reactor for efficient purification of high EO content polyether polyols, comprising a reactor (1), a separation tank (2), and a purification tank (3), characterized in that: The reactor (1), separation tank (2), and purification tank (3) are fixedly equipped with end caps (4), and the top of the end caps (4) on the reactor (1), separation tank (2), and purification tank (3) are respectively provided with a first feed inlet (5), a second feed inlet (7), and a third feed inlet (8) on one side of the top of the end caps (4). The reactor (1) is provided with a stirring structure (9), and a heating device (23) is also provided at the lower part of the reactor (1). A circulating feeding structure (10) is provided at one end of the outer side of the reactor (1). An electric three-way valve (11) is installed at the bottom discharge end of the reactor (1). The electric three-way valve (11) has a... The output end is connected to the first discharge port (6) and the end of the circulating feeding structure (10). The separation tank (2) is equipped with a centrifugal separator (12). The bottom discharge end of the separation tank (2) is equipped with a first discharge pump (13). The bottom of the first discharge pump (13) is connected to a second discharge port (14). The purification tank (3) is equipped with an adsorbent layer (15) above the interior. The purification tank (3) is equipped with a distillation device (16) located below the adsorbent layer (15). The bottom discharge end of the purification tank (3) is equipped with a second discharge pump (17). The bottom of the second discharge pump (17) is also equipped with a third discharge port (18).

2. The polymerization reactor for high-EO content polyether polyol efficient purification treatment according to claim 1, characterized in that: The stirring structure (9) includes a stirring motor (91) fixedly installed on the top end cover (4) of the reactor (1). The bottom output end of the stirring motor (91) is keyed to a rotating shaft (92). Several stirring blades (93) are fixedly installed on the periphery of the rotating shaft (92). The bottom of the rotating shaft (92) is rotatably connected to the bottom of the reactor (1) through a bearing.

3. The polymerization reactor for high-EO content polyether polyol efficient purification treatment according to claim 1, characterized in that: The circulating feeding structure (10) includes a circulating pump body (101) fixedly installed on the outer shell of the reactor (1). The input end of the circulating pump body (101) is fixedly connected to a circulating pipeline inlet pipe (102), and the output end of the circulating pump body (101) is fixedly connected to a circulating pipeline outlet pipe (103).

4. The polymerization reactor for high-EO content polyether polyol efficient purification treatment according to claim 3, characterized in that: The inlet pipe (102) of the circulation pipeline is fixedly connected to the output end of the electric three-way valve (11) on the side away from the circulation pump body (101), and the outlet pipe (103) of the circulation pipeline is fixedly connected to the upper interior of the reactor (1) on the side away from the circulation pump body (101).

5. The polymerization reactor for high-EO content polyether polyol efficient purification treatment according to claim 1, characterized in that: A first connecting pipe (19) is fixedly connected between the first discharge port (6) at the bottom of the reactor (1) and the second inlet port (7) at the top of the separation tank (2), and a second connecting pipe (20) is fixedly connected between the second discharge port (14) and the third inlet port (8) at the top of the purification tank (3).

6. The polymerization reactor for high-EO content polyether polyol efficient purification treatment according to claim 1, characterized in that: The reactor (1), separation tank (2) and purification tank (3) are also equipped with pressure relief ports (21), and safety valves are installed on the pressure relief ports (21).

7. The polymerization reactor for high-EO content polyether polyol efficient purification treatment according to claim 1, characterized in that: The bottom of the reactor (1), separation tank (2) and purification tank (3) is also provided with a drain outlet (22).

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