Polymerizing kettle with dispersed feeding structure for nylon resin production

Abstract

The utility model discloses a polymeric kettle with a dispersed feeding structure for nylon resin production, which comprises a polymeric kettle body, a jacket arranged on the circumferential outer wall of the polymeric kettle body, a support frame arranged on the circumferential outer wall of the jacket close to the bottom, and a stirring mechanism positioned in the polymeric kettle body, the premixing mechanism is located at the top of the polymerization kettle body and comprises a mixing box and three feeding pipes, a protection cover and a second motor are arranged at the position, close to the center, of the inner wall of the bottom of the mixing box, and the second motor is located in the protection cover; and an output shaft of the second motor penetrates through the outer wall of the top of the protective cover. The polymerization kettle with the dispersed feeding structure for nylon resin production has the advantages that various raw materials can be premixed in the feeding process, the mixing uniformity and the production efficiency of the raw materials are improved, and the product quality of nylon resin can be improved.

Description

Technical Field

[0001] This utility model relates to the field of chemical machinery technology, and in particular to a polymerization reactor for nylon resin production with a dispersive feeding structure. Background Technology

[0002] The polymerization reactor used in nylon resin production is the main equipment for preparing this high molecular weight compound. The polymerization reactor provides a closed and controllable reaction environment for the polymerization reaction. By adjusting parameters such as temperature, pressure, and reaction time inside the reactor, the progress of the polymerization reaction and the properties of the products can be precisely controlled.

[0003] However, in traditional nylon resin production polymerization reactors, the reactants are often fed in a centralized or single-use manner. This method can easily lead to uneven distribution of reactants within the reactor, thus affecting the efficiency of the polymerization reaction and product quality. Specifically, centralized feeding results in excessively high concentrations of reactants in some areas of the reactor, while other areas may have insufficient concentrations. This uneven distribution increases the diffusion distance between reactants and reduces the reaction rate. Furthermore, due to the uneven distribution of reactants, polymer particles of varying sizes and properties may be formed during polymerization, further affecting the quality and uniformity of the product. Utility Model Content

[0004] This utility model discloses a polymerization reactor for nylon resin production with a dispersed feeding structure. It aims to solve the problem that in traditional nylon resin polymerization reactors, the reactants are often fed in a centralized or single-time manner. This method easily leads to uneven distribution of reactants within the reactor, affecting polymerization efficiency and product quality. Specifically, centralized feeding results in excessively high local concentrations of reactants while other areas may have insufficient concentrations. This uneven distribution increases the diffusion distance between reactants, reducing the reaction rate. Furthermore, due to the uneven distribution of reactants, polymer particles of varying sizes and properties may form during polymerization, further affecting product quality and uniformity.

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

[0006] A polymerization reactor for nylon resin production with a dispersive feeding structure includes a polymerization reactor body, a jacket on the outer circumference of the polymerization reactor body, a support frame near the bottom of the outer circumference of the jacket, and further includes: a stirring mechanism located inside the polymerization reactor body; and a premixing mechanism located at the top of the polymerization reactor body. The premixing mechanism includes a mixing chamber and three feed pipes. A protective cover and a second motor are located near the center of the bottom inner wall of the mixing chamber. The second motor is located inside the protective cover, and its output shaft passes through the top outer wall of the protective cover. A connecting rod is fixedly connected to the output shaft of the second motor, and a flow divider is fixedly connected to one end of the connecting rod. A plurality of equally spaced discharge holes are opened on the outer wall of the flow divider, and the top outer wall of the flow divider is connected to the top inner wall of the mixing chamber by a bearing.

[0007] By adopting the above technical solution, multiple raw materials can be pre-mixed during the feeding process, which improves the mixing uniformity and production efficiency of the raw materials and helps to improve the product quality of nylon resin. Specifically, in use, the raw materials of nylon resin (such as monomers, catalysts, etc.) are first added to the mixing tank through three feed pipes for preliminary mixing. At this time, the second motor starts and drives the flow divider to rotate through the connecting rod. As the flow divider rotates, multiple raw materials are thrown towards the outer wall of the flow divider under the action of centrifugal force. Some raw materials will fall along the gap between the edge of the flow divider and the inner circumference of the mixing tank. Then, the flow divider will stir and mix them. After most of the raw materials are rotated and pre-mixed, they are evenly dispersed and fall into the interior of the polymerization reactor body. Then, the stirring mechanism is started to further mix and homogenize the raw materials in the polymerization reactor body.

[0008] In a preferred embodiment, the inner circumferential wall of the mixing box is provided with a spiral groove, and the bottom inner wall of the mixing box is provided with two discharge ports, the inner wall of the discharge ports being provided with discharge pipes.

[0009] In this design, the spiral groove enhances the mixing effect of raw materials in the mixing chamber. When the raw materials are added to the mixing chamber, they rotate and tumble in the mixing chamber guided by the spiral groove, thereby achieving more uniform mixing. This design not only improves mixing efficiency but also helps reduce the agglomeration of raw materials during the mixing process, ensuring that the raw materials can contact and mix more fully.

[0010] In a preferred embodiment, the stirring mechanism includes a first motor located on the top outer wall of the polymerization reactor body. The output shaft of the first motor is fixedly connected to a stirring rod. Three sets of stirring components are provided on the circumferential outer wall of the stirring rod. Each stirring component includes four stirring blades. A gas phase outlet is provided on the circumferential outer wall of the polymerization reactor body.

[0011] In this scheme, during the production process, the raw materials first enter the polymerization reactor body through the dispersion feeding structure. Then, the first motor starts, driving the stirring rod and stirring assembly to rotate. The stirring blades of the stirring assembly will drive the raw materials in the polymerization reactor body to rotate and tumble, so as to achieve full mixing and homogenization of the raw materials. At the same time, the heating / cooling system controls the temperature inside the polymerization reactor body to ensure the smooth progress of the polymerization reaction. During the polymerization reaction, the generated gas or vapor is discharged through the gas phase outlet.

[0012] As described above, a polymerization reactor for nylon resin production with a dispersive feeding structure includes a polymerization reactor body. A jacket is provided on the outer circumference of the polymerization reactor body, and a support frame is provided near the bottom of the outer circumference of the jacket. The reactor also includes: a stirring mechanism located inside the polymerization reactor body; and a premixing mechanism located at the top of the polymerization reactor body. The premixing mechanism includes a mixing chamber and three feed pipes. A protective cover and a second motor are provided near the center of the bottom inner wall of the mixing chamber. The second motor is located inside the protective cover, and its output shaft passes through the top outer wall of the protective cover. A connecting rod is fixedly connected to the output shaft of the second motor, and a flow divider is fixedly connected to one end of the connecting rod. Several equally spaced discharge holes are provided on the outer wall of the flow divider. The top outer wall of the flow divider is connected to the top inner wall of the mixing chamber via a bearing. The polymerization reactor for nylon resin production with a dispersive feeding structure provided by this utility model has the technical effect of enabling premixing of multiple raw materials during the feeding process, improving the mixing uniformity and production efficiency of the raw materials, and helping to improve the product quality of nylon resin. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a polymerization reactor for producing nylon resin with a dispersed feeding structure proposed in this utility model.

[0014] Figure 2 This is a schematic diagram of the stirring mechanism of a polymerization reactor for producing nylon resin with a dispersive feeding structure, as proposed in this utility model.

[0015] Figure 3 for Figure 2 An enlarged schematic diagram of the structure at point A.

[0016] Figure 4 This is a schematic diagram of the premixing mechanism of a polymerization reactor for nylon resin production with a dispersed feeding structure proposed in this utility model.

[0017] Figure 5 This is a top view of the premixing mechanism of a polymerization reactor for nylon resin production with a dispersion feeding structure proposed in this utility model.

[0018] In the attached diagram: 1. Polymerization reactor body; 2. Jacket; 3. Support frame; 4. Gas phase outlet; 5. Mounting plate; 6. Support rod; 7. Fixing plate; 8. Mixing box; 9. Feed pipe; 10. Discharge pipe; 11. First motor; 12. Stirring blade; 13. Second motor; 14. Protective cover; 15. Baffle plate; 16. Diverter hood; 17. Discharge port; 18. Connecting rod; 19. Mounting hole. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] This utility model discloses a polymerization reactor for nylon resin production with a dispersed feeding structure. It is mainly used in the production process of traditional nylon resin polymerization reactors, where the reactants are often fed in a centralized or one-time manner. This method can easily lead to uneven distribution of reactants in the polymerization reactor, thereby affecting the efficiency of the polymerization reaction and the quality of the product. Specifically, centralized feeding results in excessively high concentrations of reactants in some areas of the polymerization reactor, while the concentrations in other areas may be insufficient. This uneven distribution increases the diffusion distance between reactants and reduces the reaction rate. In addition, due to the uneven distribution of reactants, polymer particles of different sizes and properties may be formed during the polymerization process, further affecting the quality and uniformity of the product.

[0021] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5A polymerization reactor for producing nylon resin with a dispersible feeding structure includes a polymerization reactor body 1, a jacket 2 on the outer circumference of the polymerization reactor body 1, a support frame 3 on the outer circumference of the jacket 2 near the bottom, and further includes: a stirring mechanism located inside the polymerization reactor body 1; and a premixing mechanism located at the top of the polymerization reactor body 1. The premixing mechanism includes a mixing chamber 8 and three feed pipes 9. A protective cover 14 and a second motor 13 are located near the center of the bottom inner wall of the mixing chamber 8. The second motor 13 is located inside the protective cover 14. The output shaft of the second motor 13 passes through the top outer wall of the protective cover 14. A connecting rod 18 is fixedly connected to the output shaft of the second motor 13. One end of the connecting rod 18 is fixedly connected to a flow divider 16. Several equally spaced discharge holes are opened on the outer wall of the flow divider 16. The top outer wall of the flow divider 16 is connected to the top inner wall of the mixing chamber 8 by bearings.

[0022] It should be noted that there is a slight gap between the edge of the flow divider 16 and the inner circumferential wall of the mixing chamber 8.

[0023] The cross-sections of the flow divider 16 and the protective cover 14 are both frustum-shaped. The frustum-shaped flow divider 16 design helps the raw materials to be evenly distributed and flow smoothly within the flow divider 16, ensuring that each discharge port 17 can discharge material evenly.

[0024] In the specific implementation process, four equally distributed baffles 15 are fixedly connected to the outer circumference of the connecting rod 18. Several mounting holes 19 are opened on one side of the outer wall of the baffles 15. The main function of the baffles 15 is to change the flow direction of the nylon resin raw material mixture, increase the turbulence of the raw material mixture, and thus improve the mixing effect. Through the equally distributed baffles 15, the raw material mixture can be pre-mixed in the mixing box 8, ensuring that the raw material mixture is more evenly distributed in the polymerization reactor body 1, reducing dead corners and local high concentrations, which helps to improve the efficiency of the polymerization reaction and the product quality. In addition to fixing the baffles 15, the mounting holes 19 can also be used to install other auxiliary devices, such as temperature sensors, pressure sensors, etc., to monitor the temperature and pressure parameters in the polymerization reactor body 1 in real time.

[0025] The mixing chamber 8 is cylindrical and hollow inside. All three feed pipes 9 are connected to the interior of the mixing chamber 8. It should be noted that the inner circumference of the mixing chamber 8, the polymerization reactor body 1, the stirring mechanism, and the premixing mechanism are all coated with Teflon material to avoid sticking in the polymerization reactor during nylon resin production. This not only improves production efficiency but also facilitates subsequent cleaning.

[0026] Specifically, in use, the raw materials of nylon resin, such as monomers and catalysts, are first added to the mixing tank 8 through three feed pipes 9 for preliminary mixing. At this time, the second motor 13 starts and drives the flow divider 16 to rotate through the connecting rod 18. As the flow divider 16 rotates, various raw materials are thrown towards the outer wall of the flow divider 16 under the action of centrifugal force. Some raw materials will fall along the gap between the edge of the flow divider 16 and the inner circumference of the mixing tank 8. Then, the flow baffle 15 stirs and mixes them. After most of the raw materials are rotated and pre-mixed with the flow divider 16, they are evenly dispersed and fall into the interior of the polymerization reactor body 1. Then, the stirring mechanism is started to further mix and homogenize the raw materials in the polymerization reactor body 1. This device can achieve pre-mixing of various raw materials during the feeding process, improve the mixing uniformity of raw materials and production efficiency, and help improve the product quality of nylon resin.

[0027] This method enables uniform premixing of multiple raw materials before they enter the polymerization reactor body 1 in a dispersed manner. Therefore, when they enter the polymerization reactor body 1, they can contact and react with other reactants in the reactor more quickly. This more uniform distribution reduces the diffusion distance between reactants, thereby increasing the reaction rate. In polymerization, an increased reaction rate means a shorter production cycle, which in turn improves production efficiency.

[0028] Reference Figure 2 and Figure 3 In a preferred embodiment, the inner circumferential wall of the mixing box 8 is provided with a spiral groove, and the bottom inner wall of the mixing box 8 is provided with two discharge ports 17, and the inner wall of the discharge ports 17 is provided with a discharge pipe 10.

[0029] Specifically, the spiral groove design can enhance the mixing effect of raw materials in the mixing box 8. When the raw materials are added to the mixing box 8, they will rotate and tumble in the mixing box 8 guided by the spiral groove, thereby achieving more uniform mixing. This design not only improves the mixing efficiency, but also helps to reduce the agglomeration of raw materials during the mixing process, ensuring that the raw materials can contact and mix more fully.

[0030] Reference Figure 1 and Figure 3 In a preferred embodiment, an installation plate 5 is provided on the outer circumference of the polymerization reactor body 1 near the top. Four support rods 6 are provided on the top outer wall of the installation plate 5. One end of the support rod 6 is provided with a fixing plate 7. The fixing plate 7 is fixedly connected to the mixing box 8. One end of the feed pipe 10 extends into the interior of the polymerization reactor body 1. This design ensures that the mixed raw materials can flow smoothly from the mixing box 8 into the polymerization reactor body 1 for polymerization reaction.

[0031] Reference Figure 2In a preferred embodiment, the stirring mechanism includes a first motor 11, which is located on the top outer wall of the polymerization reactor body 1. The output shaft of the first motor 11 is fixedly connected to a stirring rod. Three sets of stirring components are provided on the outer circumferential wall of the stirring rod. The stirring components include four stirring blades 12. A gas phase outlet 4 is provided on the outer circumferential wall of the polymerization reactor body 1.

[0032] Specifically, during the production process, the raw materials first enter the polymerization reactor body 1 through the dispersion feeding structure. Then, the first motor 11 is started, driving the stirring rod and stirring assembly to rotate. The stirring blades 12 of the stirring assembly will drive the raw materials in the polymerization reactor body 1 to rotate and tumble, so as to achieve full mixing and homogenization of the raw materials. At the same time, the heating / cooling system controls the temperature in the polymerization reactor body 1 to ensure the smooth progress of the polymerization reaction. During the polymerization reaction, the generated gas or steam is discharged through the gas phase outlet 4.

[0033] Working principle: In use, the raw materials of nylon resin, such as monomers and catalysts, are first added to the mixing tank 8 through three feed pipes 9 for preliminary mixing. At this time, the second motor 13 starts and drives the flow divider 16 to rotate through the connecting rod 18. As the flow divider 16 rotates, various raw materials are thrown towards the outer wall of the flow divider 16 under the action of centrifugal force. Some raw materials will fall along the gap between the edge of the flow divider 16 and the inner circumference of the mixing tank 8. Then, the baffle 15 stirs and mixes them. After most of the raw materials are rotated and preliminarily mixed, they fall evenly into the interior of the polymerization reactor body 1 through multiple discharge holes. Then, the stirring mechanism is started to further mix and homogenize the raw materials in the polymerization reactor body 1.

[0034] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A polymerization reactor for producing nylon resin with a dispersive feeding structure, comprising a polymerization reactor body (1), wherein a jacket (2) is provided on the outer circumferential wall of the polymerization reactor body (1), and a support frame (3) is provided on the outer circumferential wall of the jacket (2) near the bottom, characterized in that, Also includes: Stirring mechanism: located inside the polymerization reactor body (1); Premixing mechanism: Located at the top of the polymerization reactor body (1), the premixing mechanism includes a mixing tank (8) and three feed pipes (9). The bottom inner wall of the mixing tank (8) is provided with a protective cover (14) and a second motor (13) near the center. The second motor (13) is located inside the protective cover (14). The output shaft of the second motor (13) passes through the top outer wall of the protective cover (14). The output shaft of the second motor (13) is fixedly connected to a connecting rod (18). One end of the connecting rod (18) is fixedly connected to a flow divider (16). Several equally spaced discharge holes are opened on the outer wall of the flow divider (16). The top outer wall of the flow divider (16) is connected to the top inner wall of the mixing tank (8) through a bearing.

2. The polymerization reactor for producing nylon resin with a dispersed feeding structure according to claim 1, characterized in that, Both the flow divider (16) and the protective cover (14) have a frustum-shaped cross-section.

3. The polymerization reactor for producing nylon resin with a dispersed feeding structure according to claim 2, characterized in that, Four equally spaced spoilers (15) are fixedly connected to the outer circumference of the connecting rod (18), and several mounting holes (19) are provided on one side of the outer wall of the spoiler (15).

4. The polymerization reactor for producing nylon resin with a dispersed feeding structure according to claim 1, characterized in that, The mixing box (8) has a cylindrical structure and the interior of the mixing box (8) is hollow. All three feed pipes (9) are connected to the interior of the mixing box (8).

5. A polymerization reactor for producing nylon resin with a dispersed feeding structure according to claim 4, characterized in that, The inner circumferential wall of the mixing box (8) is provided with a spiral groove, and the bottom inner wall of the mixing box (8) is provided with two discharge ports (17), and the inner wall of the discharge ports (17) is provided with a discharge pipe (10).

6. A polymerization reactor for producing nylon resin with a dispersed feeding structure according to claim 5, characterized in that, The outer circumferential wall of the polymerization reactor body (1) is provided with an installation plate (5) near the top. The top outer wall of the installation plate (5) is provided with four support rods (6). One end of the support rod (6) is provided with a fixing plate (7). The fixing plate (7) is fixedly connected to the mixing box (8). One end of the feed pipe (10) extends into the interior of the polymerization reactor body (1).

7. A polymerization reactor for producing nylon resin with a dispersed feeding structure according to claim 1, characterized in that, The stirring mechanism includes a first motor (11), which is located on the top outer wall of the polymerization reactor body (1). The output shaft of the first motor (11) is fixedly connected to a stirring rod. Three sets of stirring components are provided on the outer circumference of the stirring rod. The stirring components include four stirring blades (12). A gas phase outlet (4) is provided on the outer circumference of the polymerization reactor body (1).

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