Stirrer and polymerizer device

Abstract

The utility model relates to a stirrer and a polymerizer device, the stirrer comprises a stirring base, an outer support, a scraping helical ribbon, a spiral stirring piece, a lower stirring piece and an upper stirring piece, one end of the outer support is connected to the stirring base, the other end of the outer support obliquely extends upwards in the direction away from the center axis of the stirring base, one end of the scraping helical ribbon is connected to the stirring base, and the other end of the scraping helical ribbon is connected to the spiral stirring piece. The scraping helical ribbon surrounds the outer side of the outer support, and the spiral stirring piece is connected to the upper end of the stirring base and extends upwards along the central axis of the stirring base; the lower stirring piece is connected to the inner side of the outer support and located above the spiral stirring piece; and the upper stirring piece is connected above the lower stirring piece. Through the arrangement of the upper stirring piece and the lower stirring piece, materials located between the upper stirring piece and the lower stirring piece are rapidly mixed and reacted, through the arrangement of the spiral stirring piece, flowing and mixing of the materials in the area below the lower stirring piece and located on the inner side of the outer support are enhanced, removal of water vapor is accelerated, and the reaction is promoted to be carried out in the forward direction.

Description

Technical Field

[0001] The present application relates to the technical field of polymerization reaction equipment, and in particular to an agitator and a polymerization kettle device. Background Art

[0002] In industrial production, hexamethylenediamine adipate is generally used in an equimolar ratio to form a salt reaction, first to form nylon 66 salt, and then to polymerize to obtain nylon 66. During the reaction, water is released while amide bonds are generated to form a linear polymer material. The diffusion rate of water in the system determines the reaction rate. The above polymerization process can be carried out either continuously or intermittently.

[0003] Nylon 66 synthesis mechanism:

[0004] ①Salt-forming reaction:

[0005]

[0006] ②Polymerization reaction:

[0007]

[0008] Continuous polymerization kettle reactors are widely used in the chemical industry. Their main advantage is that they can react continuously. Compared with traditional batch production methods, continuous polymerization kettle reactors have shorter reaction times and higher production efficiency, which can greatly increase product output. The automation and intelligence of the production process are easier to achieve. During the production process, the reaction temperature can be automatically adjusted, and parameters such as reaction time and ingredient ratio can be accurately controlled without reheating or cooling, thereby saving a lot of energy.

[0009] One of the major problems that needs to be solved in the scale-up design of continuous polymerization kettle reactors is the problem of heat and mass transfer efficiency. Continuous reactions must quickly achieve mixing and reaction of materials in the kettle in a relatively short period of time to produce stable and qualified products. In particular, the polymerization reaction of nylon 66 requires the rapid removal of byproduct water during the reaction, otherwise it will hinder the reaction and affect the reaction efficiency and product quality. It is also necessary to prevent the accumulation and peeling of impurities caused by excessive polymerization and side reactions of nylon 66, which will affect subsequent feeding and pelletizing.

[0010] Based on this, the agitator design of the continuous polymerization kettle reactor is particularly critical. Under the condition of the same output, it is necessary to simulate and analyze the process and optimize the agitator structure design to achieve uniform mixing of materials in the kettle, rapid reaction, water vapor removal, reduce material stagnation and dead zones, prevent materials from sticking to the wall and coking, and prevent large pieces of materials from gathering and peeling off, which will affect subsequent feeding and pelletizing.

[0011] Patent CN104128156B provides a polycondenser agitator and a polycondenser assembly including the polycondenser agitator, the main disadvantages of which are: 1. There is no stirring in the area between the lower baffle, the spiral belt and the discharge screw, the viscosity of the material in this area is relatively high, and it is very difficult to remove the water vapor in the material, which affects the efficiency of the polymerization reaction and the product quality; 2. The mixing effect of the material stirring and mixing only by the upper baffle and the lower baffle is poor, and the mixing speed is low, making it difficult to form a three-dimensional stirring and mixing effect, which results in the material being unable to be quickly degassed, thereby affecting the efficiency of the polymerization reaction. Utility Model Content

[0012] Based on this, it is necessary to provide a stirrer and a polymerization kettle device to solve at least one of the above problems.

[0013] The present application provides an agitator, comprising: a stirring base, an outer bracket, a scraping spiral belt, a spiral stirring piece, a lower stirring piece and an upper stirring piece, wherein one end of the outer bracket is connected to the stirring base, and the other end extends upwardly in an inclined direction away from the central axis of the stirring base, one end of the scraping spiral belt is connected to the stirring base, and the other end extends upwardly in a spiral shape, the scraping spiral belt surrounds the outside of the outer bracket, the spiral stirring piece is connected to the upper end of the stirring base, and extends upwardly along the central axis of the stirring base; the lower stirring piece is connected to the inner side of the outer bracket, and the lower stirring piece is located above the spiral stirring piece; the upper stirring piece is connected above the lower stirring piece.

[0014] In one embodiment, the spiral stirring element includes a connecting column and a spiral belt arranged on the outside of the connecting column and spirally wound upward. The connecting column is coaxially arranged with the stirring base, and the spiral direction of the spiral belt is clockwise upward.

[0015] In one embodiment, the upper stirring member includes an upper outer ring, an upper inner ring and a plurality of upper blades, the upper outer ring is in a spiral shape, and the spiral direction is a clockwise downward spiral, the upper inner ring is in an annular shape, the upper inner ring is located on the inner side of the upper outer ring, along the axial direction of the upper stirring member, the upper inner ring is located between the two ends of the upper outer ring, the upper blades are twisted, and the upper blades are connected to the inner side of the upper outer ring through the upper inner ring.

[0016] In one embodiment, the upper stirring member includes an upper outer ring, an upper inner ring and a plurality of upper blades, the upper outer ring and the upper inner ring are both ring-shaped, the upper inner ring is located on the inner side of the upper outer ring, and the upper inner ring is located below the upper outer ring, the upper blades are twisted, and the two ends of the upper blades are respectively connected to the upper outer ring and the upper inner ring.

[0017] In one of the embodiments, the upper blade is provided with an upper through hole.

[0018] In one embodiment, the lower stirring member includes a lower outer ring, a lower inner ring and a plurality of lower blades, the lower outer ring is in a spiral shape, and the spiral direction is a clockwise upward spiral, the lower inner ring is in a ring shape, the lower inner ring is located on the inner side of the lower outer ring, along the axial direction of the stirring base, the lower inner ring is located between the two ends of the lower outer ring, the lower blades are twisted, and the lower blades are connected to the inner side of the lower outer ring through the lower inner ring.

[0019] In one embodiment, the lower stirring member includes a lower outer ring, a lower inner ring and a plurality of lower blades, the lower outer ring and the lower inner ring are both ring-shaped, the lower inner ring is located on the inner side of the lower outer ring, and the lower inner ring is located above the lower outer ring, the lower blades are twisted, and the two ends of the lower blades are respectively connected to the lower outer ring and the lower inner ring.

[0020] In one embodiment, the lower blade is provided with a lower through hole.

[0021] The present application also provides a polymerization kettle device, including a kettle body, a discharging device and the agitator as described above, wherein the agitator is arranged in the kettle body, the discharging device includes a discharging screw, a discharging port is provided at the bottom of the kettle body, the discharging screw extends into the kettle body and is fixedly connected to the stirring base, the outer bracket extends upward along the inner wall of the kettle body, and the scraping spiral belt is located between the outer bracket and the inner wall of the kettle body.

[0022] In one of the embodiments, it further comprises a position adjustment block connected to the stirring base, and the position adjustment block is used to adjust the installation position of the agitator in the kettle body.

[0023] Compared with the prior art, the agitator and polymerization kettle device provided by the present application, by arranging an upper stirring member and a lower stirring member, the materials located between the upper stirring member and the lower stirring member are quickly mixed and reacted, and by arranging a spiral stirring member, the material flow and mixing in the area below the lower stirring member and located on the inner side of the outer bracket are enhanced, the situation where the material stagnates in the area below the lower stirring member is reduced, and the escape of water vapor in the area below the lower stirring member is accelerated. Through the joint action of the upper stirring member, the lower stirring member and the spiral stirring member, the effect of three-dimensional stirring and mixing can be achieved, the rapid degassing of the material in the kettle body of the polymerization kettle device is achieved, the reaction is promoted to proceed in the forward direction, thereby improving the efficiency of the polymerization reaction and the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a schematic structural diagram of a polymerization reactor device according to one embodiment of the present application;

[0026] Figure 2 for Figure 1 A top view of the upper stirring member in FIG.

[0027] Figure 3 A top view of an upper stirring member according to another embodiment of the present application;

[0028] Figure 4 A top view of an upper stirring member according to another embodiment of the present application;

[0029] Figure 5 for Figure 1 A top view of the lower stirring member in FIG.

[0030] Figure 6 A top view of a lower stirring member according to another embodiment of the present application;

[0031] Figure 7 A top view of a lower stirring member according to another embodiment of the present application;

[0032] Figure 8 This is a schematic structural diagram of a polymerization reactor device according to another embodiment of the present application;

[0033] Fig. 9 This is a schematic structural diagram of a polymerization reactor device according to another embodiment of the present application.

[0034] 1. Agitator; 2. Stirring base; 2. Outer bracket; 2. Scraper; 2. Spiral stirring element; 2. Connecting column; 2. Spiral belt; 2. Lower stirring element; 2. Lower outer ring; 2. Lower inner ring; 2. Lower blade; 2. Lower through hole; 2. Upper stirring element; 2. Upper outer ring; 2. Upper inner ring; 2. Upper blade; 2. Upper through hole; 2. Scraper assembly; 2. Scraper bracket; 2. Scraper; 2. First bracket; 2. Second bracket; 3. Discharging device; 3. Discharging screw; 4. Position adjustment block. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0036] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0040] See also Figure 1 The present application provides a polymerization kettle device, including a kettle body 10, an agitator 20 and a discharging device 30.

[0041] The bottom of the kettle body 10 is provided with a discharge port 11, and the discharge device 30 is installed at the bottom of the kettle body 10. It can be understood that the kettle body 10 also includes a feed port and a safety pressure relief port and other equipment ports that meet the process and safety requirements. Figure 1 As shown, a feed nozzle 12 connected to the feed port is provided on the top of the kettle body 10, and a spiral baffle can be provided inside the feed nozzle 12. During feeding, the high-viscosity material is buffered by the spiral baffle and flows downward along the spiral line near the center line of the nozzle. The water vapor diffuses and flows downward around the nozzle wall, thereby separating the high-viscosity material from the water vapor, preventing the water vapor from entraining the high-viscosity material and impacting the liquid surface in the kettle body 10 when flowing at a high speed, and avoiding material splashing and liquid level fluctuation.

[0042] The kettle body 10 can be made of corrosion-resistant austenitic stainless steel, duplex stainless steel and other metal materials, and the inner surface is polished, and the finish meets the requirements of the field of polymer materials for the control of metal foreign matter in products. The optional polishing accuracy Ra = 0.1μm-1.6μm, preferably Ra = 0.2μm.

[0043] An outer jacket 13 is disposed outside the kettle body 10 , and the outer jacket 13 can maintain the kettle body 10 within a preset temperature range, thereby facilitating the reaction of the materials in the kettle body 10 .

[0044] The discharge device 30 of this embodiment is similar to a screw conveying pump, and includes a discharge screw 31, which extends into the kettle body 10 and is connected to the agitator 20, so that the agitator 20 is driven to rotate by the discharge screw 31, and at the same time, the rotation of the discharge screw 31 can squeeze the material out of the kettle body 10. The material of the discharge device 30 is consistent with or close to that of the kettle body 10, and the discharge device 30 is also made of corrosion-resistant austenitic stainless steel, duplex stainless steel and other metal materials, and the inner surface is polished, and the finish meets the requirements of the field of polymer materials for the control of metal foreign matter in products.

[0045] In one embodiment, the discharge screw 31 is an equidistant screw. When the equidistant screw is conveying materials, the internal volume of the spiral structure remains unchanged, and the materials are not squeezed or compressed. In another embodiment, the discharge screw 31 is a variable pitch screw. When the variable pitch screw is conveying materials, the internal volume of the spiral structure changes, the volume becomes larger, and the squeezing and compression of the materials are reduced.

[0046] The agitator 20 includes an agitating base 21, an outer bracket 22, a scraping spiral belt 23, a spiral agitating element 24, a lower agitating element 25 and an upper agitating element 26. The agitating base 21 is fixedly connected to the discharging screw 31, so that the discharging screw 31 can drive the agitating base 21 to rotate, thereby stirring the material in the kettle body 10. The bottom of the kettle body 10 is conical, and the material easily flows downward and is discharged from the discharge port 11. One end of the outer bracket 22 is connected to the agitating base 21, and the other end is inclined and extends upward in a direction away from the central axis of the agitating base 21. In this way, the outer bracket 22 is adapted to the shape of the bottom of the kettle body 10, so that the outer bracket 22 extends upward along the inner wall of the kettle body 10. One end of the scraping spiral belt 23 is connected to the agitating base 21, and the other end is spirally extended upward. The scraping spiral belt 23 surrounds the outside of the outer bracket 22, that is, the scraping spiral belt 23 is located between the outer bracket 22 and the inner wall of the kettle body 10. The inner edge of the scraping spiral belt 23 is fixed to the outer bracket 22, so that when the scraping spiral belt 23 rotates with the rotation of the stirring base 21, the scraping spiral belt 23 can scrape off the materials or impurities adhering to the inner wall of the kettle body 10, so as to be discharged out of the kettle body 10 through the discharge screw 31. The spiral stirring member 24 is connected to the upper end of the stirring base 21 and extends upward along the central axis of the stirring base 21. The lower stirring member 25 is connected to the inner side of the outer bracket 22, and the lower stirring member 25 is located above the spiral stirring member 24. The upper stirring member 26 is connected above the lower stirring member 25. In this way, the stirrer 20 divides the inner cavity of the kettle body 10 into: a fast mixing reaction zone located between the upper stirring member 26 and the lower stirring member 25, a scraping zone located between the outer side of the outer bracket 22 and the inner wall of the kettle body 10, an auxiliary mixing reaction zone located below the lower stirring member 25 and located inside the outer bracket 22, and a discharge zone near the discharge port 11. The upper stirring member 26 and the lower stirring member 25 work together to quickly mix and react the materials between the upper stirring member 26 and the lower stirring member 25. At the same time, the spiral stirring member 24 is arranged below the lower stirring member 25 and in the area inside the outer bracket 22, thereby enhancing the flow and mixing of materials in the area below the lower stirring member 25, reducing the stagnation of materials in this area, accelerating the release of water vapor in this area, and promoting the reaction to proceed in the forward direction, thereby improving the efficiency of the polymerization reaction and the product quality.

[0047] In this embodiment, the stirring base 21 is cylindrical, and the stirring base 21 and the discharge screw 31 are connected and fixed by threads, so that the stirring base 21 can rotate synchronously with the discharge screw 31. The spiral direction of the connecting thread is opposite to the rotation direction of the stirring base 21, so that the stirrer 20 and the discharge screw 31 can be self-locked, which can prevent the stirrer 20 from loosening and falling off during operation.

[0048] The stirring base 21 serves as the starting point and foundation of the outer bracket 22, the scraper belt 23, and the spiral stirring element 24, and is connected to the outer bracket 22, the scraper belt 23, and the spiral stirring element 24 respectively, and the connection method can be welding, riveting, or connection through fasteners.

[0049] The outer bracket 22 is fixedly connected to the outer wall of the stirring base 21. The outer bracket 22 can be one or more, for example, 4, 6, 8, etc. When there are multiple outer brackets 22, the multiple outer brackets 22 are preferably evenly arranged along the circumference of the stirring base 21. The outer bracket 22 is preferably arranged parallel to the inner wall of the kettle body 10, so that it is conducive to setting the scraping spiral belt 23 outside the outer bracket 22. The outer bracket 22 can be made of round steel or angle steel, and this application does not limit this.

[0050] A scraping spiral belt 23 is arranged between the outer bracket 22 and the inner wall of the kettle body 10. When the agitator 20 is working, the scraping spiral belt 23 rotates with the stirring base 21, and the outer edge of the scraping spiral belt 23 can scrape off the impurities adhering to the inner wall of the kettle body 10, and discharge them out of the kettle body 10 through the discharging screw 31. The scraping spiral belt 23 is arranged to increase the renewal speed of the liquid film on the inner wall of the kettle body 10, prevent the accumulation and peeling of impurities caused by excessive polymerization and side reactions of nylon 66, avoid affecting the subsequent feeding and pelletizing, and ensure product quality.

[0051] See also Figure 1 The scraper spiral ribbon 23 extends upward from the stirring base 21 along the inner wall of the kettle body 10, and the outer edge of the scraper spiral ribbon 23 is arranged parallel to the inner wall of the kettle body 10. The gap between the outer edge of the scraper spiral ribbon 23 and the inner wall of the kettle body 10 is 0 to 50 mm, preferably 0 to 20 mm, to ensure that the scraper spiral ribbon 23 can scrape off the materials or impurities adhering to the inner wall of the kettle body 10. The width of the scraper spiral ribbon 23 can be 2 mm to 20 mm. In this embodiment, the inner edge of the scraper spiral ribbon 23 is welded and fixed to the outer bracket 22, so that the structural strength and stability of the scraper spiral ribbon 23 can be improved.

[0052] Further, the agitator 20 further includes a scraper assembly 27, the scraper assembly 27 includes a scraper bracket 271 and a scraper 272, the scraper bracket 271 is fixedly connected to the upper end of the outer bracket 22, the scraper bracket 271 is fixedly connected to the upper stirring member 26, and the scraper 272 is arranged on the side of the scraper bracket 271 away from the upper stirring member 26. In this way, the material or impurities on the inner wall of the kettle body 10 can be scraped off by the scraper 272. The scraper bracket 271 is fixedly connected to the outer bracket 22 and the upper stirring member 26 respectively, ensuring the structural strength and stability of the scraper assembly 27. The main body of the kettle body 10 is cylindrical, and the scraper assembly 27 is arranged corresponding to the cylindrical part of the kettle body 10. Further, the outer edge of the scraper 272 is arranged parallel to the inner wall of the kettle body 10, so that the scraper 272 can scrape off the material or impurities adhered to the inner wall of the kettle body 10. The width of the scraper 272 can be 0 to 20 mm. Furthermore, the gap between the scraper 272 and the inner wall of the kettle body 10 is adjustable, and the gap can be 0 to 20 mm. The scraper 272 is set at an angle to the liquid surface in the kettle body 10, so that it is convenient to scrape the material residue formed by the fluctuation of the liquid surface downward, and the angle between the scraper 272 and the liquid surface can be 80° to 90°. The scraper 272 can be set to be detachably mounted on the scraper bracket 271, so that it is convenient to replace and repair the scraper 272 during maintenance. The number of scraper assemblies 27 can be one or more, which is selected according to the volume of the kettle body 10, preferably three.

[0053] When the agitator 20 is working, the upper stirring member 26 stirs the material downward, and the lower stirring member 25 stirs the material upward, so that a rapid mixing reaction zone is formed between the upper stirring member 26 and the lower stirring member 25, and the material in the kettle body 10 is rapidly mixed, reacted and degased in this zone.

[0054] See also Figure 1 and Figure 2 In one embodiment, the upper stirring member 26 includes an upper outer ring 261, an upper inner ring 262 and a plurality of upper blades 263. The upper outer ring 261 is in the shape of a spiral ribbon, and the spiral direction is a clockwise downward spiral. The upper outer ring 261 is fixedly connected to the scraper bracket 271. The upper inner ring 262 is in the shape of a ring, and the upper inner ring 262 is located on the inner side of the upper outer ring 261. Along the axial direction of the stirring base 21, the upper inner ring 262 is located between the two ends of the upper outer ring 261. The upper blades 263 are twisted, and the upper blades 263 are connected to the inner side of the upper outer ring 261 through the upper inner ring 262. In this way, the upper stirring member 26 can stir the material downward when it rotates. The upper outer ring 261, the upper inner ring 262 and the upper blades 263 of the upper stirring member 26 are connected, which ensures the overall structural strength and stability of the agitator 20.

[0055] The upper outer ring 261 and the upper inner ring 262 are coaxially arranged, and the structure is more stable. The upper blades 263 are evenly arranged along the circumference of the upper outer ring 261 and the upper inner ring 262, which can improve the mixing effect of the materials in the kettle body 10.

[0056] Furthermore, the upper blade 263 is provided with an upper through hole 2631, which can effectively shear high-viscosity materials, improve the mixing effect of materials, accelerate the removal of water vapor, and thus promote the reaction to proceed in the forward direction. Furthermore, the upper through hole 2631 can be a circular hole or an elliptical hole.

[0057] Furthermore, the upper inner ring 262 may be one or more, and providing one or more upper inner rings 262 can improve the structural strength and stability of the upper stirring member 26. Figure 2 As shown, the upper inner ring 262 is one, and correspondingly, a layer of upper blades 263 is provided inside the upper outer ring 261; Figure 3 As shown, there are two upper inner rings 262, and correspondingly, two layers of upper blades 263 are arranged inside the upper outer ring 261; Figure 4 As shown, there are three upper inner rings 262, and correspondingly, three layers of upper blades 263 are arranged inside the upper outer ring 261. The number of upper inner rings 262, the number of upper blades 263 and the number of layers can be selected according to the stirring effect required for the material. Optionally, the number of upper blades 263 is 4 to 128.

[0058] See also Figure 8 In another embodiment, the upper stirring member 26 includes an upper outer ring 261, an upper inner ring 262 and a plurality of upper blades 263. The upper outer ring 261 and the upper inner ring 262 are both annular. The upper outer ring 261 is fixedly connected to the scraper bracket 271. The upper inner ring 262 is located inside the upper outer ring 261 and below the upper inner ring 261. The upper blades 263 are twisted, and the two ends of the upper blades 263 are respectively connected to the upper outer ring 261 and the upper inner ring 262. In this way, the upper stirring member 26 can stir the material downward when rotating. The upper outer ring 261, the upper inner ring 262 and the upper blades 263 of the upper stirring member 26 are connected, which ensures the overall structural strength and stability of the agitator 20.

[0059] The upper outer ring 261 and the upper inner ring 262 are coaxially arranged, and the structure is more stable. The upper blades 263 are evenly arranged along the circumference of the upper outer ring 261 and the upper inner ring 262, which can improve the mixing effect of the materials in the kettle body 10.

[0060] Furthermore, the upper blade 263 is provided with an upper through hole 2631, which can effectively shear high-viscosity materials, improve the mixing effect of materials, accelerate the removal of water vapor, and thus promote the reaction to proceed in the forward direction. Furthermore, the upper through hole 2631 can be a circular hole or an elliptical hole.

[0061] Further, the number of upper blades 263 can be selected according to the stirring effect required for the material. Optionally, the number of upper blades 263 is 4 to 16.

[0062] See also Figure 1and Figure 5 In one embodiment, the lower stirring member 25 includes a lower outer ring 251, a lower inner ring 252 and a plurality of lower blades 253. The lower outer ring 251 is in the shape of a spiral ribbon, and the spiral direction is a clockwise upward spiral. The lower outer ring 251 is fixedly connected to the outer bracket 22. The lower inner ring 252 is annular, and the lower inner ring 252 is located on the inner side of the lower outer ring 251. Along the axial direction of the stirring base 21, the lower inner ring 252 is located between the two ends of the lower outer ring 251. The lower blades 253 are twisted, and the lower blades 253 are connected to the inner side of the lower outer ring 251 through the lower inner ring 252. In this way, the lower stirring member 25 can stir the material downward when it rotates. The lower outer ring 251, the lower inner ring 252 and the lower blades 253 of the lower stirring member 25 are connected, which ensures the overall structural strength and stability of the agitator 20.

[0063] The lower outer ring 251 and the lower inner ring 252 are coaxially arranged, and the structure is more stable. The lower blades 253 are evenly arranged along the circumference of the lower outer ring 251 and the lower inner ring 252, which can improve the mixing effect of the materials in the kettle body 10.

[0064] Further, the lower blade 253 is provided with a lower through hole 2531, and the lower through hole 2531 can effectively shear high-viscosity materials, improve the mixing effect of materials, accelerate the removal of water vapor, and thus promote the reaction to proceed in the forward direction. Further, the lower through hole 2531 can be a circular hole or an elliptical hole.

[0065] Furthermore, the lower inner ring 252 may be one or more, and providing one or more lower inner rings 252 can improve the structural strength and stability of the lower stirring member 25. Figure 5 As shown, the lower inner ring 252 is one, and correspondingly, a layer of lower blades 253 is provided inside the lower outer ring 251; Figure 6 As shown, there are two lower inner rings 252, and correspondingly, two layers of lower blades 253 are arranged inside the lower outer ring 251; Figure 7 As shown, there are three lower inner rings 252, and correspondingly, three layers of lower blades 253 are arranged inside the lower outer ring 251. The number of lower inner rings 252, the number of lower blades 253 and the number of layers can be selected according to the stirring effect required for the material. Optionally, the number of lower blades 253 is 4 to 128.

[0066] See also Figure 8In another embodiment, the lower stirring member 25 includes a lower outer ring 251, a lower inner ring 252 and a plurality of lower blades 253. The lower outer ring 251 and the lower inner ring 252 are both annular. The lower outer ring 251 is fixedly connected to the outer bracket 22. The lower inner ring 252 is located inside the lower outer ring 251, and the lower inner ring 252 is located above the lower outer ring 251. The lower blades 253 are twisted, and the two ends of the lower blades 253 are respectively connected to the lower outer ring 251 and the lower inner ring 252. In this way, the lower stirring member 25 can stir the material downward when rotating. The lower outer ring 251, the lower inner ring 252 and the lower blades 253 of the lower stirring member 25 are connected, which ensures the overall structural strength and stability of the agitator 20.

[0067] The lower outer ring 251 and the lower inner ring 252 are coaxially arranged, and the structure is more stable. The lower blades 253 are evenly arranged along the circumference of the lower outer ring 251 and the lower inner ring 252, which can improve the mixing effect of the materials in the kettle body 10.

[0068] Further, the lower blade 253 is provided with a lower through hole 2531, and the lower through hole 2531 can effectively shear high-viscosity materials, improve the mixing effect of materials, accelerate the removal of water vapor, and thus promote the reaction to proceed in the forward direction. Further, the lower through hole 2531 can be a circular hole or an elliptical hole.

[0069] Further, the number of the lower blades 253 can be selected according to the stirring effect required for the material. Optionally, the number of the lower blades 253 is 4 to 16.

[0070] As described above, the upper blade 263 is provided with an upper through hole 2631, and the lower blade 253 is provided with a lower through hole 2531. The upper through hole 2631 and the lower through hole 2531 are provided to improve the mixing effect of the material. Further, in the vertical projection on the plane perpendicular to the stirring base 21, that is, the vertical projection on the horizontal plane, the upper through hole 2631 and the lower through hole 2531 are staggered, so that the stirring power can be effectively reduced, the mixing shear of the agitator 20 on the high-viscosity nylon 66 can be improved, the surface renewal of the high-viscosity material can be accelerated, the removal of water vapor in the kettle body 10 can be accelerated, and the reaction can be further promoted to proceed in the forward direction.

[0071] This article discloses two types of upper stirring members 26 and two types of lower stirring members 25. The two types of upper stirring members 26 and the two types of lower stirring members 25 can be combined arbitrarily. Figure 7 The upper stirring member 26 shown is defined as a first upper stirring member. Figure 8 The upper stirring member 26 shown is defined as a second upper stirring member. Figure 7 The lower stirring member 25 shown is defined as a first lower stirring member. Figure 8 The lower stirring member 25 shown is defined as a second lower stirring member. Figure 7As shown, the upper stirring member 26 is the first upper stirring member, and the lower stirring member 25 is the first lower stirring member; Figure 8 As shown, the upper stirring member 26 is the second upper stirring member, and the lower stirring member 25 is the second lower stirring member; Fig. 9 As shown, the upper stirring member 26 is the first upper stirring member, and the lower stirring member 25 is the second lower stirring member; of course, in another embodiment, the upper stirring member may be the second upper stirring member, and the lower stirring member may be the first lower stirring member.

[0072] Furthermore, the agitator 20 also includes a first bracket 28 disposed between the upper agitator 26 and the lower agitator 25. The first bracket 28 connects the upper agitator 26 and the lower agitator 25. In this way, the structural strength and stability of the agitator 20 can be further improved. At the same time, the first bracket 28 can also play a certain role in stirring, mixing and accelerating degassing. Furthermore, the first bracket 28 can be made of round steel or angle steel. The number of the first bracket 28 can be one or more, and the number can be selected according to the volume of the kettle body 10. Figure 1 As shown, the first bracket 28 connects the upper inner ring 262 and the lower outer ring 251; Figure 8 As shown, the first bracket 28 connects the upper inner ring 262 and the lower inner ring 252; Fig. 9 As shown, the first bracket 28 connects the upper outer ring 261 and the lower inner ring 252 .

[0073] Furthermore, the agitator 20 also includes a second bracket 29 disposed below the lower agitator 25, and the second bracket 29 connects the lower agitator 25 and the outer bracket 22, so that the structural strength and stability of the agitator 20 can be further improved. At the same time, the second bracket 29 can also play a certain role in stirring, mixing and accelerating degassing. Furthermore, the second bracket 29 can be made of round steel or angle steel. The number of the second brackets 29 can be one or more, and the number can be selected according to the volume of the kettle body 10. Figure 1 As shown, the second bracket 29 connects the lower inner ring 252 and the outer bracket 22. Figure 8 and Fig. 9 As shown, the second bracket may not be arranged below the lower stirring member 25 .

[0074] The present application provides a spiral stirring element 24 in the auxiliary mixing reaction zone to strengthen the flow and mixing of materials in the zone, and accelerate the release of water vapor in the zone, thereby promoting the reaction to proceed in the positive direction. Figure 1The spiral stirring member 24 includes a connecting column 241 and a spiral belt 242 arranged on the outside of the connecting column 241 and spirally coiled upward. The connecting column 241 is coaxially arranged with the stirring base 21, and the spiral direction of the spiral belt 242 is clockwise upward. In this way, the spiral stirring member 24 stirs the material upward when rotating, thereby strengthening the mixing and degassing of the material in the auxiliary mixing reaction zone. The spiral stirring member 24 has a very simple structure and a good stirring effect. In addition, the spiral axial force of the spiral stirring member 24 is downward, which can offset a part of the upward axial force generated by the discharge screw 31, so that the agitator 20 rotates more stably. Further, the polymerization kettle device also includes a position adjustment block 40 connected to the stirring base 21, and the position adjustment block 40 is used to adjust the installation position of the agitator 20 in the kettle body 10. In this way, the relative position of the agitator 20 and the inner wall of the kettle body 10 can be guaranteed, and the outer edge connection line of the scraping spiral belt 23 is parallel to the inner wall of the kettle body 10, thereby meeting the stirring requirements of different materials and different processes. Optionally, the height of the position adjustment block 40 is 0-40 mm, ensuring that the agitator 20 is installed at a suitable height.

[0075] The polymerization kettle device provided in the present application can reduce materials and stagnant dead zones by arranging an upper stirring member 26, a lower stirring member 25 and a spiral stirring member 24, so that the materials can be quickly mixed and reacted, and the removal of water vapor in the kettle body 10 can be accelerated; by arranging a scraping spiral belt 23 and a scraper 272, the residual materials adhering to the inner wall of the kettle body 10 can be scraped downwards to prevent the materials from sticking to the wall and coking, and to prevent the aggregation and peeling of large pieces of materials from affecting the subsequent feeding and pelletizing, and is particularly suitable for the polymerization reaction of nylon 66.

[0076] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A stirrer, characterized in that: include: Stirring base, outer bracket, scraper belt, spiral stirring element, lower stirring element and upper stirring element, One end of the outer bracket is connected to the stirring base, and the other end thereof extends upwardly and obliquely away from the central axis of the stirring base. One end of the scraping spiral belt is connected to the stirring base, and the other end extends upward in a spiral shape. The scraping spiral belt surrounds the outside of the outer bracket. The spiral stirring element is connected to the upper end of the stirring base and extends upward along the central axis of the stirring base; The lower stirring member is connected to the inner side of the outer bracket, and the lower stirring member is located above the spiral stirring member; The upper stirring member is connected above the lower stirring member.

2. The agitator according to claim 1, characterized in that The spiral stirring element comprises a connecting column and a spiral belt arranged on the outer side of the connecting column and spirally wound upward. The connecting column is coaxially arranged with the stirring base, and the spiral direction of the spiral belt is clockwise upward.

3. The agitator according to claim 1, characterized in that The upper stirring member includes an upper outer ring, an upper inner ring and a plurality of upper blades. The upper outer ring is in a spiral shape, and the spiral direction is a clockwise downward spiral. The upper inner ring is in a ring shape. The upper inner ring is located on the inner side of the upper outer ring. Along the axial direction of the upper stirring member, the upper inner ring is located between the two ends of the upper outer ring. The upper blades are twisted and connected to the inner side of the upper outer ring through the upper inner ring.

4. The agitator according to claim 1, characterized in that The upper stirring member includes an upper outer ring, an upper inner ring and a plurality of upper blades, the upper outer ring and the upper inner ring are both ring-shaped, the upper inner ring is located on the inner side of the upper outer ring, and the upper inner ring is located below the upper outer ring, the upper blades are twisted, and the two ends of the upper blades are respectively connected to the upper outer ring and the upper inner ring.

5. The agitator according to claim 3 or 4, characterized in that: The upper blade is provided with an upper through hole.

6. The agitator according to claim 1, characterized in that The lower stirring member includes a lower outer ring, a lower inner ring and a plurality of lower blades. The lower outer ring is in a spiral shape, and the spiral direction is a clockwise upward spiral. The lower inner ring is in a ring shape. The lower inner ring is located on the inner side of the lower outer ring. Along the axial direction of the stirring base, the lower inner ring is located between the two ends of the lower outer ring. The lower blades are twisted and connected to the inner side of the lower outer ring through the lower inner ring.

7. The agitator according to claim 1, characterized in that The lower stirring member includes a lower outer ring, a lower inner ring and a plurality of lower blades, the lower outer ring and the lower inner ring are both ring-shaped, the lower inner ring is located on the inner side of the lower outer ring, and the lower inner ring is located above the lower outer ring, the lower blades are twisted, and the two ends of the lower blades are respectively connected to the lower outer ring and the lower inner ring.

8. The agitator according to claim 6 or 7, characterized in that: The lower blade is provided with a lower through hole.

9. A polymerization reactor device, characterized in that: It includes a kettle body, a discharging device and an agitator as described in any one of claims 1 to 8, wherein the agitator is arranged in the kettle body, the discharging device includes a discharging screw, a discharging port is provided at the bottom of the kettle body, the discharging screw extends into the kettle body and is fixedly connected to the stirring base, the outer bracket extends upward along the inner wall of the kettle body, and the scraping spiral belt is located between the outer bracket and the inner wall of the kettle body.

10. The polymerization reactor device according to claim 9, characterized in that: It also includes a position adjustment block connected to the stirring base, and the position adjustment block is used to adjust the installation position of the stirrer in the kettle body.

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