Polymerizing kettle device

Abstract

The utility model relates to a polymeric kettle device which comprises a kettle body and an internal heating assembly, the internal heating assembly is arranged in the kettle body and comprises a feeding main pipe, a feeding pipe, a collecting pipe, a discharging pipe and a discharging main pipe, the feeding main pipe and the discharging main pipe are arranged close to the bottom of the kettle body, the collecting pipe is arranged above the feeding main pipe and the discharging main pipe, and the discharging pipe is arranged below the feeding main pipe and the discharging main pipe. One ends of the feeding pipes are communicated with the feeding header pipe, the other ends of the feeding pipes are communicated with the collecting pipe, one ends of the discharging pipes are communicated with the collecting pipe, and the other ends of the discharging pipes are communicated with the discharging header pipe. According to the polymerization kettle device, the multiple feeding pipes and the multiple discharging pipes are adopted in the inner heating assembly arranged in the kettle body, the multiple pipes are fed and discharged at the same time, the flow of a pipeline is increased, the flow path of a heating medium in the pipeline is shortened, and the pressure drop of the pipeline is effectively reduced, so that the temperature difference between an inlet and an outlet of the heating medium can be effectively reduced; the temperature distribution of the materials in the kettle body is more uniform, and the materials in the kettle body are prevented from coking.

Description

Technical Field

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

[0002] In industrial production, adipic acid and hexamethylenediamine are generally used in an equal molar ratio to form a salt, 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] Intermittent polymerization reactors are widely used in the chemical industry. Their main advantage is that they can perform batch reactions, switch to different specifications in each batch, and obtain expected and qualified products through different feed ratios or materials, and precise control of reaction temperature, pressure and reaction time.

[0009] One of the major problems that needs to be solved in the scale-up design of intermittent polymerization reactors is the heat transfer problem. The polymerization reaction of nylon 66 is an endothermic reaction. The heat transfer capacity is the key to the quality of nylon 66 products. Temperature is the decisive factor in measuring the smooth and rapid polymerization reaction. A large amount of heat is required during the polymerization process to maintain the continuous reaction. Therefore, whether the temperature in the reactor can be effectively and quickly increased during the polymerization process determines the production capacity and product quality of the equipment. Under high temperature, high pressure, and corrosive materials, the thickness of the equipment body is generally more than 20mm, and the thermal resistance of metal materials may even be higher than the convective heat transfer resistance on the material side. Since metal materials have the characteristics of thermal expansion and contraction, and the thermal expansion coefficients of different metal materials are not the same, when the equipment involving heat transfer, such as kettle reactors and heat exchangers, is put into operation, there will be some stress concentration areas. Excessive thermal stress caused by temperature difference will have an adverse effect on the safe operation of the equipment. Leakage of high-temperature materials from weak links may also cause fires and explosions.

[0010] Based on this, heat exchange equipment needs to strictly control the maximum heat transfer temperature difference. Under the premise of a certain heat load, the measures that can be taken are to improve the total heat transfer coefficient and to increase the heat exchange area. For kettle reactors / evaporators, the focus is generally on the design of the internal heat exchange tubes.

[0011] Patent CN 113648931 A provides a jacketed autoclave device. Compared with circulating heating, the durable heating jacket can obtain a relatively high heat transfer coefficient at a lower heat transfer oil flow rate. The main disadvantages are: the inner coil is too long, the heat medium flow in the inner coil is too long, and the inlet and outlet temperature difference is too large, which is not conducive to the control of the temperature uniformity of the material in the polymerization reactor. In order to improve the heat transfer efficiency, it may even be necessary to increase the inlet heat transfer oil temperature, resulting in excessively high local temperature and coking of the material. Utility Model Content

[0012] Based on this, it is necessary to provide a polymerization kettle device that can improve the temperature uniformity of the materials in the polymerization kettle and reduce the coking of the materials.

[0013] A polymerization kettle device comprises a kettle body and an internal heating component, wherein the internal heating component is arranged in the kettle body, and the internal heating component comprises a feed main pipe, an upper pipe, a collecting pipe, a lower pipe and a discharge main pipe, wherein the feed main pipe and the discharge main pipe are both arranged near the bottom of the kettle body, and the collecting pipe is arranged above the feed main pipe and the discharge main pipe. There are multiple feed pipes, and one end of the multiple feed pipes is connected to the feed main pipe, and the other end is connected to the collecting pipe. There are multiple lower pipes, and one end of the multiple lower pipes is connected to the collecting pipe, and the other end is connected to the discharge main pipe.

[0014] In one of the embodiments, it also includes a distribution jacket, and the internal heating component also includes an inlet pipe and an outlet pipe. The feed main pipe is connected to the distribution jacket through the inlet pipe, and the discharge main pipe is connected to the distribution jacket through the outlet pipe. The distribution jacket has a heat medium inlet and a heat medium outlet. The distribution jacket is used to distribute the heat medium entering the distribution jacket from the heat medium inlet to the inlet pipe, and transport it to the feed main pipe through the inlet pipe, and transport the heat medium output from the discharge main pipe to the heat medium outlet through the outlet pipe, and output it to the outside of the kettle body through the heat medium outlet.

[0015] In one embodiment, the kettle body includes a main body and a lower head, the lower end of the main body is provided with an opening, the lower head is connected to the opening at the lower end of the main body and closes the opening, the distribution jacket is connected to the outer wall of the lower head, the internal heating assembly is connected to the inner wall of the lower head, and the polymerization kettle device also includes an external heating assembly, which is arranged around the outer wall of the main body.

[0016] In one of the embodiments, the feed main pipe and the discharge main pipe are connected to form a ring, and a lower cover shell is provided above the feed main pipe and the discharge main pipe.

[0017] In one of the embodiments, the lower cover shell is annular, the outer surface of the lower cover shell is set as an arc surface, and a plurality of avoidance holes are set on the top of the lower cover shell, and the upper and lower material pipes pass through the avoidance holes respectively.

[0018] In one of the embodiments, an upper cover is provided above the collecting pipe.

[0019] In one embodiment, the upper cover shell is annular and includes two inclined surfaces set at an angle, the upper ends of the two inclined surfaces are connected to each other, the lower ends are inclined in directions away from each other, and the lower ends of the two inclined surfaces are connected to the outer surface of the collecting pipe.

[0020] In one embodiment, the manifold is annular, and the upper and lower material pipes are arranged in an annular array along the circumference of the manifold, and the number of the annular array is one or more.

[0021] In one of the embodiments, the loading pipe and the loading pipe are arranged into at least two annular arrays, and the pipes of adjacent annular arrays are arranged in a staggered manner.

[0022] In one of the embodiments, a support member is further included, wherein the support member is supported below the feed main pipe and the discharge main pipe.

[0023] Compared with the prior art, the polymerization kettle device provided in the present application has an internal heating component arranged in the kettle body, which adopts multiple feeding pipes and multiple feeding pipes. Multiple pipes are raised and lowered at the same time, which increases the flow rate of the pipeline and shortens the flow of the heat medium in the pipeline, effectively reducing the pressure drop of the pipeline, thereby effectively reducing the temperature difference between the inlet and outlet of the heat medium, making the temperature distribution of the material in the kettle body more uniform, and preventing the material in the kettle body from coking. 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 This is a schematic structural diagram of the welding point between the distribution jacket and the lower head according to an embodiment of the present application;

[0027] Figure 3 A top view of a lower housing according to an embodiment of the present application;

[0028] Figure 4 It is a schematic diagram of a partial cross-sectional structure of a polymerization kettle device at a lower casing according to an embodiment of the present application;

[0029] Figure 5 A top view of an upper cover shell according to an embodiment of the present application;

[0030] Figure 6 It is a schematic diagram of a partial cross-sectional structure of a polymerization kettle device at an upper cover shell according to an embodiment of the present application;

[0031] Figure 7 A bottom view of an upper material pipe, a lower material pipe and a manifold according to an embodiment of the present application;

[0032] Figure 8 A bottom view of an upper material pipe, a lower material pipe and a manifold according to another embodiment of the present application;

[0033] Fig. 9 This is a bottom view of the upper material pipe, the lower material pipe and the collecting pipe according to another embodiment of the present application.

[0034] 1. Heat transfer device; 2. Heat exchanger; 3. Heat exchanger outlet; 4. Heat exchanger lining; 5. Heat exchanger lining; 6. Heat exchanger lining lining; 7. Heat exchanger lining lining; 8. Heat exchanger lining lining; 9. Heat exchanger lining lining; 10. Kettle body; 101. Feed inlet; 102. Safety pressure relief port; 103. Discharge port; 11. Main body; 12. Lower head; 20. Internal heating assembly; 21. Feed main pipe; 215. Heat medium through hole; 22. Feeding pipe; 23. Collecting pipe; 231. Second heat medium through hole; 24. Feeding pipe; 25. Discharge main pipe; 26. Inlet pipe; 27. Outlet pipe; 28. Support; 30. External heating assembly; 31. Semicircular heat exchange tube; 32. External inlet; 33. External outlet; 40. Distribution jacket; 41. Heat medium inlet; 42. Heat medium outlet; 50. Agitator; 60. High-pressure flange; 61. Leak detection port; 70. Lower cover shell; 71. Avoidance through hole; 80. Upper cover shell. 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 "lower housing" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "lower housing" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" 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, the lower cover feature being “above” or “below” the second feature may mean that the lower cover feature is directly in contact with the second feature, or the lower cover feature is in contact with the second feature indirectly through an intermediate medium. Moreover, the lower cover feature being “above”, “above” and “above” the second feature may mean that the lower cover feature is directly above or obliquely above the second feature, or simply means that the lower cover feature is higher in level than the second feature. The lower cover feature being “below”, “below” and “below” the second feature may mean that the lower cover feature is directly below or obliquely below the second feature, or simply means that the lower cover 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 and an internal heating component 20. The kettle body 10 is provided with equipment pipe openings such as material inlet and outlet, safety pressure relief port, etc. that meet the process and safety requirements. Figure 1 As shown, the top of the kettle body 10 is provided with a feed port 101 and a safety pressure relief port 102, and the bottom of the kettle body 10 is provided with a discharge port 103. The kettle body 10 is made of corrosion-resistant austenitic stainless steel, duplex stainless steel and other metal materials, and the inner surface is polished. The finish meets the requirements of the field of polymer materials for the control of metal foreign matter in the product. Specifically, the polishing accuracy Ra=0.1μm-1.6μm, preferably Ra=0.2μm.

[0041] The internal heating assembly 20 is arranged in the kettle body 10, and is used to heat the material in the kettle body 10. The internal heating assembly 20 includes a feed main pipe 21, a feed pipe 22, a header 23, a feed pipe 24, and a discharge main pipe 25. The feed main pipe 21 and the discharge main pipe 25 are both arranged near the bottom of the kettle body 10, and the header 23 is arranged above the feed main pipe 21 and the discharge main pipe 25. There are multiple feed pipes 22, and one end of the multiple feed pipes 22 is connected to the feed main pipe 21, and the other end is connected to the header 23. There are multiple feed pipes 24, and one end of the multiple feed pipes 24 is connected to the header 23, and the other end is connected to the discharge main pipe 25. In this way, the heat medium enters from the feed main pipe 21 and is simultaneously transported to the manifold 23 through multiple feed pipes 22. After the manifold 23 changes the direction of the heat medium, it is transported to the discharge main pipe 25 through multiple feed pipes 24, and finally discharged from the discharge main pipe 25. Compared with the heat transfer method of a single pipe in one in and one out in the prior art, the present application adopts multiple feed pipes 22 and multiple feed pipes 24, multiple pipes are simultaneously up and multiple pipes are simultaneously down, which increases the flow rate of the pipeline, shortens the process of the heat medium in the pipeline, and effectively reduces the pressure drop of the pipeline, thereby effectively reducing the temperature difference between the inlet and outlet of the heat medium, making the temperature distribution of the material in the kettle body 10 more uniform, and preventing the material in the kettle body 10 from coking.

[0042] Further, the polymerization kettle device also includes an agitator 50 disposed in the kettle body 10, and the agitator 50 is used for dispersing and mixing materials, strengthening heat and mass transfer, and reducing material stagnation. According to the characteristics of the process materials, the agitator 50 can select different types of agitators such as folding paddle type, spiral ribbon type, frame type, etc. In the present embodiment, the agitator 50 is arranged at the top of the kettle body 10. It can be understood that the structural design of the internal heating component 20 inside the kettle body 10 and the position of the equipment nozzle need to match the type of agitator 50, especially when using a wall-mounted agitator, such as a frame agitator, a "Π" area needs to be reserved on the top and side of the kettle body 10, and pipelines and other internal structures cannot be arranged. The heat medium inlet and outlet need to be arranged at the bottom of the kettle body 10, and the entire internal heating component 20 is in the "Π" area.

[0043] In one embodiment, a wall-attached agitator, such as an anchor agitator and a frame agitator, is used, and the ratio of the diameter of the agitator 50 to the inner diameter of the kettle body 10 is controlled to be 0.9 to 0.98. In this way, the surface renewal of the inner wall of the kettle body 10 is promoted, the formation of a stagnant layer is prevented, and the uniformity of the material is improved.

[0044] Furthermore, the polymerization kettle device further includes an external heating component 30, which is arranged on the outer wall of the kettle body 10 and is used to heat the kettle body 10 from the outside, so as to maintain the kettle body 10 within a preset temperature range. The internal heating component 20 heats the material from the inside of the kettle body 10, and the external heating component 30 heats the material from the outside of the kettle body 10. It can be seen that by arranging the internal heating component 20 and the external heating component 30, the temperature of the material in the kettle body 10 is made more uniform.

[0045] In this embodiment, the external heating assembly 30 includes a semicircular heat exchange tube 31, which is wound along the kettle body 10. The lower end of the semicircular heat exchange tube 31 is provided with an external inlet 32, and the upper end of the semicircular heat exchange tube 31 is provided with an external outlet 33. The heat medium enters the semicircular heat exchange tube 31 from the external inlet 32, flows from the semicircular heat exchange tube 31 from bottom to top, fills the semicircular heat exchange tube 31, and finally flows out from the external outlet 33, thereby transferring heat to the material in the kettle body 10. The semicircular heat exchange tube 31 covers 40% to 70% of the outer surface of the kettle body 10 (this percentage includes the gap between the semicircular heat exchange tube 31 and the semicircular heat exchange tube 31), and has a good heat transfer effect.

[0046] The semicircular heat exchange tube 31 of the external heating component 30 is installed on the outer surface of the kettle body 10 by beveling inside and outside and adopting a single-sided welding and double-sided forming welding technology. In this way, the weld strength is ensured and the weld cracking caused by thermal expansion due to periodic alternating thermal stress loads and high and low temperature differences is resisted.

[0047] Furthermore, the polymerization kettle device further comprises a distribution jacket 40, which is used to distribute heat medium so that the heat medium flows into the feed main pipe 21 and flows out of the kettle body 10 from the discharge main pipe 25, and the distribution jacket 40 also plays a role of heat preservation.

[0048] Furthermore, the internal heating component 20 also includes an inlet pipe 26 and an outlet pipe 27. The feed main pipe 21 is connected to the distribution jacket 40 through the inlet pipe 26, and the discharge main pipe 25 is connected to the distribution jacket 40 through the outlet pipe 27. The distribution jacket 40 has a heat medium inlet 41 and a heat medium outlet 42. The distribution jacket 40 is used to distribute the heat medium entering the distribution jacket 40 from the heat medium inlet 41 to the inlet pipe 26, and transport it to the feed main pipe 21 through the inlet pipe 26, and transport the heat medium output from the discharge main pipe 25 of the internal heating component 20 to the heat medium outlet 42 through the outlet pipe 27, and output it to the outside of the kettle body 10 through the heat medium outlet 42.

[0049] The kettle body 10 includes a main body 11 and a lower head 12. The lower end of the main body 11 is provided with an opening. The lower head 12 is connected to the opening at the lower end of the main body 11 and closes the opening. The external heating assembly 30 is arranged around the outer wall of the main body 11, the distribution jacket 40 is connected to the outer wall of the lower head 12, and the internal heating assembly 20 is connected to the inner wall of the lower head 12. In this way, the installation and maintenance of the internal heating assembly 20 and other structures in the kettle body 10 are facilitated.

[0050] The lower head 12 and the main body 11 can be connected through a high-pressure flange 60, and the flange surface can be selected from a raised surface (RF), a concave-convex surface (MFM), a tongue-and-groove surface (TG), a full plane (FF), and a ring joint surface (RJ). The concave-convex surface (MFM) is preferred. In addition, a leak detection port 61 for checking leakage can be provided on the high-pressure flange 60, so that flange leakage can be detected in time to ensure the safety of the device.

[0051] The heat medium enters the distribution jacket 40 from the heat medium inlet 41, and enters the inner heating assembly 20 from the distribution jacket 40. The heat medium after entering the inner heating assembly 20 for heat exchange is finally output to the distribution jacket 40, and is output to the outside from the heat medium outlet 42 of the distribution jacket 40. For the heat medium transportation of the inner heating assembly 20, at least two independent jacket chambers can be set in the distribution jacket 40, and the jacket chambers are respectively connected to the inlet pipe 26 and the outlet pipe 27 of the inner heating assembly 20, so that the heat medium can enter the feed main pipe 21 of the inner heating assembly 20 through the inlet pipe 26 after distribution, and the heat medium output from the outlet main pipe 25 of the inner heating assembly 20 can be output through the outlet pipe 27, and finally output to the outside through the heat medium outlet 42 of the jacket chamber.

[0052] The distribution jacket 40 can be welded to the surface of the lower head 12. In order to avoid stress concentration during normal operation, the distribution jacket 40 and the lower head 12 are preferably welded by arc transition, and the cone angle θ is generally 45 degrees. Figure 2 As shown, the spacing j between the distribution jacket 40 and the lower head 12 can be 40 to 100 mm. The heat transfer enhancement on the distribution jacket 40 side requires increasing the flow rate of the heating medium. When using a liquid phase heat medium such as thermal oil, the pitch of the guide plate in the distribution jacket 40 can be adjusted to control the liquid phase flow rate to 1.5 m / s to 3.0 m / s. In this way, the resistance drop of the heat medium flowing through the outer heating component 30 and the inner heating component 20 is as close as possible, and the forced circulation pump can be shared. In addition, when arranging the distribution jacket 40, it is necessary to consider setting up an exhaust port, or when designing the inlet and outlet positions of the thermal oil, it is necessary to uniformly consider preventing the heat medium from filling the distribution jacket 40.

[0053] The material of the inner heating component 20 can be the same as or close to that of the kettle body 10. Specifically, the inner heating component 20 is made of corrosion-resistant austenitic stainless steel, duplex stainless steel and other metal materials, and the surface is polished. The finish meets the requirements of the polymer material field for the control of metal foreign matter in the product. Specifically, the polishing accuracy Ra=0.1μm-1.6μm, preferably Ra=0.2μm.

[0054] See also Figure 1 , the internal heating component 20 may include one or more inlet pipes 26, and one or more outlet pipes 27. One end of the one or more inlet pipes 26 is connected to the feed main pipe 21, and the other end is connected to the distribution chamber in the distribution jacket 40 that is connected to the heat medium inlet 41; one end of the one or more outlet pipes 27 is connected to the discharge main pipe 25, and the other end is connected to the distribution chamber in the distribution jacket 40 that is connected to the heat medium outlet 42. In one embodiment, the internal heating component 20 includes one inlet pipe 26 and one outlet pipe 27, and the structure is simpler. In another embodiment, the internal heating component 20 includes two inlet pipes 26 and two outlet pipes 27, and the support structure stability of the internal heating component 20 is better. When the inlet pipe 26 and the outlet pipe 27 are each set to two or more, the distribution jacket 40 can distribute the heat medium flow more evenly, thereby improving the temperature uniformity of the material in the kettle body 10.

[0055] The inlet pipe 26 and the outlet pipe 27 can be selected as fluid delivery pipes (i.e., pipe pipes) with an outer diameter of 80 mm to 300 mm, including seven specifications of outer diameters: 89 mm (DN80), 108 mm (DN100), 133 mm (DN125), 159 mm (DN150), 219 mm (DN200), 273 mm (DN250), and 325 mm (DN300). The specific size can be determined according to the heat load and the flow rate of the heat medium, and a fluid delivery pipe with an outer diameter of 108 mm (DN100) is preferred.

[0056] Furthermore, the inlet pipe 26 and the outlet pipe 27 are welded to the inner side of the lower end cap 12, which can improve the structural strength and stability of the internal heating assembly 20. Moreover, the internal heating assembly 20 can be removed from the kettle body 10 by removing the lower end cap 12 from the main body 11 of the kettle body 10, which is very convenient for inspecting the internal heating assembly 20. The welds between the inlet pipe 26, the outlet pipe 27 and the lower end cap 12 can be polished into a circular arc transition and retain a certain excess height, which can reduce the residue and aggregation of high-viscosity materials.

[0057] In addition, the polymerization kettle device may also include a support member 28, and the support member 28 is supported below the feed main pipe 21 and the discharge main pipe 25. In this way, the stability of the structure of the internal heating component 20 can be further improved. Furthermore, the support member 28 can be movable or fixed. In the present embodiment, the support member 28 is fixed. Specifically, one end of the support member 28 is welded and fixed to the feed main pipe 21 or the discharge main pipe 25, and the other end is welded and fixed to the lower head 12 of the kettle body 10. In this way, the structure is more stable. The number of support members 28 can be one or more, preferably multiple, and evenly distributed below the feed main pipe 21 and the discharge main pipe 25. In the present embodiment, four support members 28 are provided, and two are provided below the feed main pipe 21 and the discharge main pipe 25.

[0058] In this embodiment, the feed main pipe 21 and the discharge main pipe 25 are connected in a ring shape, so that the structure is simpler. It is understandable that the feed main pipe 21 and the discharge main pipe 25 can be two independent pipes connected in a ring shape by welding. The feed main pipe 21 and the discharge main pipe 25 can also be a complete ring pipe, which is divided into two non-interconnected parts by a baffle arranged inside, thereby forming the feed main pipe 21 and the discharge main pipe 25. In this embodiment, the number of the feed main pipe 21 and the discharge main pipe 25 is one, but not limited to this. In other embodiments, the number of the feed main pipe 21 and the discharge main pipe 25 can also be multiple. When there are multiple feed main pipes 21, one feed main pipe 21 can be connected to multiple feed pipes 22, or one feed main pipe 21 can be connected to one feed pipe 22; similarly, when there are multiple discharge main pipes 25, one discharge main pipe 25 can be connected to multiple discharge pipes 24, or one discharge main pipe 25 can be connected to one discharge pipe 24.

[0059] The feed main pipe 21 and the discharge main pipe 25 are provided so that the heat medium is first transported to the feed main pipe 21 and then distributed to multiple feed pipes 22, and multiple heat media flowing down from the discharge pipes 24 are first collected in the discharge main pipe 25 and then discharged in a centralized manner. This makes the structure of the internal heating component 20 simpler, and the feed main pipe 21 and the discharge main pipe 25 support the feed pipe 22 and the discharge pipe 24, making the structure more solid and stable.

[0060] The feed main pipe 21 and the discharge main pipe 25 can select a fluid delivery pipe (i.e., Pipe pipe) with an outer diameter of 80 mm to 300 mm, including seven specifications of outer diameters: 89 mm (DN80), 108 mm (DN100), 133 mm (DN125), 159 mm (DN150), 219 mm (DN200), 273 mm (DN250), and 325 mm (DN300). The specific selection can be made according to the heat load, and a fluid delivery pipe with an outer diameter of 108 mm (DN100) is preferred.

[0061] Furthermore, a lower cover 70 is provided above the feed main pipe 21 and the discharge main pipe 25. The lower cover 70 can reduce the adhesion of high-viscosity materials on the surface of the feed main pipe 21 and the discharge main pipe 25, thereby reducing the residue and aggregation of high-viscosity materials in the kettle body 10.

[0062] See also Figure 3 Since the feed main pipe 21 and the discharge main pipe 25 together form an annular pipe, the lower cover shell 70 is correspondingly arranged in an annular shape. Furthermore, the lower cover shell 70 is an integral annular cover with a very simple structure. However, it is not limited thereto. In other embodiments, two or more independent lower cover shells 70 may be arranged for the feed main pipe 21 and the discharge main pipe 25. In order to avoid affecting the connection between the upper pipe and the feed main pipe, and to avoid affecting the connection between the lower pipe and the discharge main pipe, a plurality of avoidance holes 71 are arranged on the top of the lower cover shell 70. The upper pipe 22 and the lower pipe 24 pass through the avoidance holes 71 respectively, so as to be connected to the feed main pipe 21 and the discharge main pipe 25 respectively. Please refer to Figure 4 The outer surface of the lower cover shell 70 is set as an arc surface, which is conducive to the material sliding down along the arc surface, thereby avoiding the material from accumulating on the lower cover shell 70.

[0063] Furthermore, heat medium may or may not be introduced into the lower shell 70. The introduction of heat medium into the lower shell 70 is conducive to heat transfer, thereby maintaining the temperature consistency of the material in the kettle body 10. When heat medium is introduced into the lower shell 70, the heat medium in the feed main pipe 21 can be introduced into the lower shell 70. Specifically, the feed main pipe 21 and the discharge main pipe 25 are both provided with a first heat medium through hole 215 connected to the inner cavity of the lower shell 70. The heat medium in the feed main pipe 21 enters the lower shell 70 through the first heat medium through hole 215, and the heat medium in the area of ​​the lower shell 70 corresponding to the discharge main pipe 25 is output to the discharge main pipe 25 through the first heat medium through hole 215, so that the lower shell 70 can maintain efficient heat transfer.

[0064] See also Figure 1 An upper cover shell 80 is provided above the manifold 23. The upper cover shell 80 can reduce the adhesion of high-viscosity materials on the surface of the manifold 23, thereby reducing the residue and aggregation of high-viscosity materials in the kettle body 10.

[0065] In one embodiment, the manifold 23 is annular, see Figure 3 , the upper cover shell 80 is correspondingly arranged in a ring shape. Furthermore, the upper cover shell 80 is an integral ring cover with a very simple structure. Figure 4 The upper cover shell 80 includes two inclined surfaces arranged at an angle, the upper ends of the two inclined surfaces are connected to each other, the lower ends are inclined in a direction away from each other, and the lower ends of the two inclined surfaces are connected to the outer surface of the manifold. In this way, the cross section of the upper cover shell 80 is sharp-angled, which is conducive to the material sliding down along the inclined surfaces on both sides of the sharp angle, thereby avoiding the material from accumulating on the upper cover shell 80.

[0066] Furthermore, heat medium may or may not be introduced into the upper shell 80. The introduction of heat medium into the upper shell 80 is conducive to heat transfer, thereby maintaining the temperature consistency of the material in the kettle body 10. When heat medium is introduced into the upper shell 80, the heat medium in the manifold 23 can be introduced into the upper shell 80. Specifically, the regions on the manifold 23 corresponding to the upper material pipe 22 and the lower material pipe 24 are respectively provided with second heat medium through holes 231 connected to the inner cavity of the upper shell 80. The heat medium in the manifold 23 enters the upper shell 80 through a part of the second heat medium through holes 231, and the heat medium in the upper shell 80 is output to the manifold 23 through another part of the second heat medium through holes 215, so that the upper shell 80 can maintain efficient heat transfer. See Figure 1 The upper material pipe 22 and the lower material pipe 24 are both straight pipes, and extend in the up-down direction, and the structure is very simple.

[0067] In this embodiment, the manifold 23 is annular, and the feed pipe 22 and the feed pipe 24 are arranged in an annular array along the circumference of the manifold 23. The number of the annular array is one or more. In this way, the eddy current can be prevented. Figure 7 and Figure 8 As shown, the feed pipe 22 and the feed pipe 24 can be arranged in a circular array, such as Fig. 9 As shown, the feed pipe 22 and the feed pipe 24 can be arranged in two annular arrays. Of course, the feed pipe 22 and the feed pipe 24 can also be arranged in three or more annular arrays, which is not limited in the present application. In each annular array, the total number of the feed pipe 22 and the feed pipe 24 can be 8, 12, 16, 20, 32, 64, etc. It can be understood that the feed pipe 22 and the feed pipe 24 are respectively arranged on both sides of the manifold 23, and preferably the same number.

[0068] When the feeding pipe 22 and the feeding pipe 24 are arranged into at least two annular arrays, the pipes of adjacent annular arrays are arranged in a staggered manner, which is conducive to sufficient heat exchange between the heat exchange pipe and the materials in the kettle body 10 and can improve the mixing effect of the materials.

[0069] The upper pipe 22 and the lower pipe 24 can be selected as fluid delivery pipes (i.e., pipes) with an outer diameter of 20 mm to 80 mm, and five specifications of outer diameters of 25 mm (DN20), 32 mm (DN25), 38 mm (DN32), 45 mm (DN40), and 57 mm (DN50). The specific selection can be made according to the heat load, and the fluid delivery pipe with an outer diameter of 45 mm (DN40) is preferred.

[0070] 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.

[0071] 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 polymerization reactor device, characterized in that: It includes a kettle body and an internal heating component, wherein the internal heating component is arranged in the kettle body, and the internal heating component includes a feed main pipe, a feed pipe, a collecting pipe, a feed pipe and a discharge main pipe. The feed main pipe and the discharge main pipe are both arranged near the bottom of the kettle body, the collecting pipe is arranged above the feed main pipe and the discharge main pipe, there are multiple feeding pipes, and one end of the multiple feeding pipes is connected to the feed main pipe, and the other end is connected to the collecting pipe, there are multiple lowering pipes, and one end of the multiple lowering pipes is connected to the collecting pipe, and the other end is connected to the discharge main pipe.

2. The polymerization reactor device according to claim 1, characterized in that: The inner heating assembly further comprises a distribution jacket, and the inner heating assembly further comprises an inlet pipe and an outlet pipe, the feed main pipe is connected to the distribution jacket through the inlet pipe, and the discharge main pipe is connected to the distribution jacket through the outlet pipe. The distribution jacket has a heat medium inlet and a heat medium outlet. The distribution jacket is used to distribute the heat medium entering the distribution jacket from the heat medium inlet to the inlet pipe, and transport it to the feed main pipe through the inlet pipe, and transport the heat medium output from the discharge main pipe to the heat medium outlet through the outlet pipe, and output it to the outside of the kettle body through the heat medium outlet.

3. The polymerization reactor device according to claim 2, characterized in that: The kettle body comprises a main body and a lower head, the lower end of the main body is provided with an opening, and the lower head is connected to the opening at the lower end of the main body and closes the opening. The distribution jacket is connected to the outer wall of the lower head, and the inner heating assembly is connected to the inner wall of the lower head. The polymerization kettle device further comprises an external heating component, and the external heating component is arranged around the outer wall of the main body.

4. The polymerization reactor device according to claim 1, characterized in that: The feed main pipe and the discharge main pipe are connected to form a ring, and a lower cover shell is arranged above the feed main pipe and the discharge main pipe.

5. The polymerization reactor device according to claim 4, characterized in that: The lower cover shell is annular, the outer surface of the lower cover shell is set as an arc surface, and the top of the lower cover shell is provided with a plurality of avoidance through holes, and the upper material pipe and the lower material pipe pass through the avoidance through holes respectively.

6. The polymerization reactor device according to claim 1, characterized in that: An upper cover shell is arranged above the collecting pipe.

7. The polymerization reactor device according to claim 6, characterized in that: The upper cover shell is annular and includes two inclined surfaces arranged at an angle, the upper ends of the two inclined surfaces are connected to each other, the lower ends are inclined in directions away from each other, and the lower ends of the two inclined surfaces are connected to the outer surface of the collecting pipe.

8. The polymerization reactor device according to claim 1, characterized in that: The collecting pipe is annular, and the upper pipe and the lower pipe are arranged in an annular array along the circumference of the collecting pipe, and the number of the annular array is one or more.

9. The polymerization reactor device according to claim 8, characterized in that: The feeding pipes and the feeding pipes are arranged into at least two annular arrays, and the pipes of adjacent annular arrays are arranged alternately.

10. The polymerization reactor device according to claim 1, characterized in that: It also includes a support member, which is supported below the feed main pipe and the discharge main pipe.

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