A sulfonation reaction apparatus for monomer-modified strong acid cation exchange resin

Abstract

This invention discloses a sulfonation reaction apparatus for monomer-modified strong acid cation exchange resin, relating to the technical field of ion exchange resin production and processing. The invention includes a reaction assembly and a feeding assembly. The reaction assembly includes a reactor body with an inlet and an outlet fixedly connected to its top and bottom, respectively. A central shaft is rotatably connected to the center of the reactor body's inner cavity, and a stirring rod is fixedly connected to the outer periphery of the central shaft. Through the main assembly, this invention, during operation, uses a constant-temperature oil bath circulator to drive a heat transfer medium (such as heat transfer oil) through a connecting water pipe into a spiral water channel within the sidewall of the reactor body. Simultaneously, the medium flows into the hollow central shaft and the stirring rod, ensuring even diffusion throughout the reactor cavity. Combined with the spiral design of the water channel, this achieves three-dimensional constant-temperature heating of the reaction system, solving the problem of excessive temperature difference between the edges and the center in traditional apparatuses.

Description

Technical Field

[0001] This utility model belongs to the technical field of ion exchange resin production and processing, and in particular relates to a sulfonation reaction device for monomer-modified strong acid cation exchange resin. Background Technology

[0002] The sulfonation reaction of strong acid cation exchange resin involves reacting styrene-divinylbenzene copolymer white spheres with excess concentrated sulfuric acid or fuming sulfuric acid at 80-120°C for several hours, causing the hydrogen on the benzene ring to be replaced by sulfonic acid groups (-SO3H). Before the reaction, pretreatment is required to remove impurities and moisture, and after the reaction, water washing is used to remove residual acid. The reaction equipment mainly includes a corrosion-resistant reactor (lined with enamel or polytetrafluoroethylene) with stirring, heating and temperature control functions, a metering pump or vacuum feeding system for precise addition of sulfonating agent, a condensation device for recovering volatiles, a water washing tank and filter to separate resin and waste liquid, and an alkaline absorption tower for treating acid mist. The entire set of equipment must meet the requirements of strong acid resistance, good sealing, and be equipped with safety facilities.

[0003] However, it still has the following drawbacks in actual use: Most of the existing sulfonation reaction devices for strong acid cation exchange resins are heated by the reaction vessel jacket, which has low heating efficiency and causes a large temperature difference between the inside and the edge of the reaction vessel, affecting the overall quality of the sulfidation reaction. It cannot heat the entire device evenly. At the same time, the sulfiding agent needs to be added slowly during the process. In actual production, it is mostly added manually, which makes it difficult to accurately control the addition rate. Utility Model Content

[0004] The purpose of this invention is to provide a sulfonation reaction device for monomer-modified strong acid cation exchange resin. The core of this invention is to improve the uniformity and stability of the sulfonation reaction by optimizing temperature control and material mixing efficiency through the main components. It is suitable for industrial production of monomer-modified strong acid cation exchange resin and solves the problems of excessive temperature difference between the edge and the center and difficulty in accurately controlling the rate of manual addition of sulfiding agent in traditional devices.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a sulfonation reaction device for monomer-modified strong acid cation exchange resin, including a reaction component and a feeding component. The reaction component includes a reaction vessel body, with a feeding port and a discharging port respectively fixed through the top and bottom of the reaction vessel body. A central shaft is rotatably connected to the center of the inner cavity of the reaction vessel body, and a stirring rod is fixed through the outer periphery of the central shaft. The reaction assembly includes a water channel, which is spirally opened inside the side wall of the main body of the reactor. A constant temperature oil bath circulator is fixed at the top of the main body of the reactor. The reaction assembly also includes a connecting water pipe. The constant temperature oil bath circulator, the water channel and the central shaft are circulated and connected through the connecting water pipe. The connection between the two ends of the central shaft and the connecting water pipe is through and rotatably connected. A motor is also fixed at the top of the reactor body. A bevel gear one is fixed to the motor's power shaft. A bevel gear two, which meshes with bevel gear one, is fixed to the outer circumference side of one end of the reactor body, protruding from the central shaft.

[0006] Furthermore, a base is fixed to the outer periphery of the reactor body.

[0007] Furthermore, an outer shell is fixed to the top of the reactor body, and the motor, bevel gear one, and bevel gear two are all housed inside the outer shell.

[0008] Furthermore, both the central shaft and the stirring rod are hollow. The inner cavity of the central shaft is provided with multiple partitions, and the multiple partition cavities of the central shaft are interconnected sequentially through the corresponding stirring rods.

[0009] Furthermore, the feeding assembly includes an outer cylinder that is connected to the top of the reactor body. Several water passage holes are provided on the outer periphery of the outer cylinder. An inner cylinder is provided in the inner cavity of the outer cylinder. Water passage holes corresponding to the water passage holes are provided on the outer periphery of the inner cylinder. An electric telescopic rod is also fixed to the top of the reactor body. The telescopic end of the electric telescopic rod is fixed to the inner cylinder and protrudes from one end of the outer cylinder. When the inner cylinder moves toward the reactor body, the water passage holes one and two gradually overlap.

[0010] Furthermore, the feeding assembly also includes a hopper, with the outlet end of the hopper extending into the inner cavity of the inner cylinder.

[0011] This utility model has the following beneficial effects: 1. This utility model, through its main components, uses a constant-temperature oil bath circulator to drive the heat transfer medium (such as heat transfer oil) through a connecting water pipe into a spiral water channel within the side wall of the reactor body. Simultaneously, the medium flows into the central shaft and stirring components of the hollow structure, allowing it to spread evenly throughout the reactor cavity. Combined with the spiral design of the water channel, it achieves three-dimensional constant-temperature heating of the reaction system. Its core lies in improving the uniformity and stability of the sulfonation reaction through optimized temperature control. It is suitable for the industrial production of monomer-modified strong acid cation exchange resins, solving the problem of excessive temperature difference between the edge and center in traditional devices.

[0012] 2. This utility model, through its feeding component, allows raw materials to be fed into the device via a hopper. Activating the electric telescopic rod propels the inner cylinder, causing water inlet one and water inlet two to gradually overlap. By changing the inlet diameter, the rate of vulcanizing agent addition can be precisely controlled. This method plays a significant role in producing different quantities and types of ion exchange resins. Its core advantage lies in optimizing temperature control and material mixing efficiency, solving the problem in existing solutions where the vulcanizing agent is mostly added slowly and manually, making precise control of the addition rate impossible. Both excessively fast and slow additions negatively impact the quality of the vulcanization reaction. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of the overall appearance of this utility model; Figure 2 This is a structural schematic diagram of the overall appearance of this utility model from a frontal view. Figure 3 This is a schematic diagram of the water channel of this utility model; Figure 4 This is a structural schematic diagram showing the cross-sectional view of the main body of the reactor, the central shaft, and the stirring rod of this utility model. Figure 5 This is a schematic diagram of the feeding assembly of this utility model.

[0014] Figure label: 1. Reaction assembly; 11. Reactor body; 111. Inlet; 112. Outlet; 113. Base; 12. Central shaft; 121. Stirring rod; 13. Water tank; 14. Connecting water pipe; 15. Thermostatic oil bath circulator; 16. Motor; 17. Bevel gear one; 171. Bevel gear two; 18. Outer shell; 2. Feeding assembly; 21. Outer cylinder; 22. Water passage hole one; 23. Inner cylinder; 24. Water passage hole two; 25. Electric telescopic rod; 26. Hopper. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0016] Please see Figure 1-5As shown, this utility model is a sulfonation reaction device for monomer-modified strong acid cation exchange resin. Its core lies in improving the uniformity and stability of the sulfonation reaction by optimizing temperature control and material mixing efficiency. It is suitable for industrial production of monomer-modified strong acid cation exchange resin. It includes a reaction component 1 and a feeding component 2. The reaction component 1 includes a reactor body 11. The reactor body 11 has an inlet 111 and an outlet 112 fixed through the top and bottom of the reactor body 11, respectively. A central shaft 12 is rotatably connected to the center of the inner cavity of the reactor body 11. A stirring rod 121 is fixed through the outer periphery of the central shaft 12. The reactor body 11 is a cylindrical sealed container with an inlet 111 at the top and an outlet 112 at the bottom. The outer periphery is fixed to the operating table by a base 113 to ensure the stability of the reaction process.

[0017] The reaction assembly 1 includes a water channel 13, which is spirally opened inside the side wall of the reaction vessel body 11. A constant temperature oil bath circulator 15 is fixed at the top of the reaction vessel body 11. The reaction assembly 1 also includes a connecting water pipe 14. The constant temperature oil bath circulator 15, the water channel 13 and the central shaft 12 are circulated and connected through the connecting water pipe 14. The two ends of the central shaft 12 are connected to the connecting water pipe 14 in a through and rotatable manner. A motor 16 is also fixed at the top of the reaction vessel body 11. A bevel gear 17 is fixed on the power shaft of the motor 16. A bevel gear 171 that meshes with the bevel gear 17 is fixed on the outer side of one end of the central shaft 12 that protrudes from the reaction vessel body 11.

[0018] The water tank 13 almost occupies the entire periphery of the reactor body 11, replacing the original reactor jacket layer. At the same time, it can also ensure the flow characteristics of the heating solution, making it more uniform and stable for preheating. The constant temperature oil bath circulator 15 mainly plays the role of driving the circulation of the heating agent (hot oil) and constant heating. The linkage water pipe assists in the circulation of the heating agent. The central shaft 12 and the stirring component, driven by the motor 16, not only realize the original stirring function, but also conduct heat. Heating is carried out at the same time as stirring, so that the sulfonation reaction of the ion exchange resin is heated more uniformly.

[0019] Furthermore, a base 113 is fixed to the outer periphery of the reactor body 11, which ensures the stable placement of the entire device.

[0020] Furthermore, a housing 18 is fixed to the top of the reactor body 11. The motor 16, bevel gear 17 and bevel gear 2 171 are all housed inside the housing 18. The housing 18 is used to protect the motor 16, bevel gear 17 and bevel gear 2 171, which are easily damaged components.

[0021] Furthermore, both the central shaft 12 and the stirring rod 121 are hollow. The inner cavity of the central shaft 12 is provided with multiple partitions, and the multiple partition cavities of the central shaft 12 are interconnected in sequence through the corresponding stirring rod 121. This allows the heating agent to circulate between the central shaft 12 and the stirring element, thereby improving the uniformity of heating.

[0022] Furthermore, the feeding assembly 2 includes an outer cylinder 21 that is connected to the top of the reactor body 11. Several water passage holes 22 are provided on the outer periphery of the outer cylinder 21. An inner cylinder 23 is provided in the inner cavity of the outer cylinder 21. Water passage holes 24 corresponding to the water passage holes 22 are provided on the outer periphery of the inner cylinder 23. An electric telescopic rod 25 is also fixed to the top of the reactor body 11. The telescopic end of the electric telescopic rod 25 is fixed to the inner cylinder 23 and protrudes from one end of the outer cylinder 21. When the inner cylinder 23 moves toward the reactor body 11, the water passage holes 22 and 24 gradually overlap.

[0023] The feed assembly 2 of the device controls the size of its through holes by controlling the overlapping area of ​​water through holes 1 22 and water through holes 24, thereby controlling the vulcanizing agent placement rate and enabling better vulcanization.

[0024] Furthermore, the feeding assembly 2 also includes a hopper 26, the outlet end of which extends into the inner cavity of the inner cylinder 23. The feeding hopper 26 is cone-shaped, which allows the device to better accommodate the vulcanizing agent and prevents spillage.

[0025] The specific working principle of this utility model is as follows: When using this device, the connection status of each component should be checked first, the sealing of the constant temperature oil bath circulator 15 and the connecting water pipe 14 should be confirmed, the rotational connection between the central shaft 12 and the reactor body 11 should be ensured without jamming, and the power components such as the motor 16 and the electric telescopic rod 25 should be powered normally. Then, according to the requirements of the sulfonation reaction, the temperature is preset by the constant temperature oil bath circulator 15, and the speed of the motor 16 is adjusted to ensure that the stirring intensity is suitable for the material characteristics.

[0026] In the subsequent material input stage, the swollen resin balls are added to the enamel-lined reactor body 11 via a vacuum feeder or screw conveyor. The body of the reactor is an enamel-lined reactor. Then, sulfonating agent (fuming sulfuric acid or concentrated sulfuric acid) is slowly added according to the ratio (usually sulfonating agent: resin = 3:1~5:1). This process is achieved through the feeding component 2. First, the electric telescopic rod 25 is activated to put it in a retracted state. At this time, the water passage hole 24 of the inner cylinder 23 is completely offset from the water passage hole 22 of the outer cylinder 21, and the feeding channel is in a closed state to prevent premature material leakage. The raw material, i.e., the sulfonating agent, is fed into the device through the hopper 26. After the feeding is completed, the electric telescopic rod 25 extends, driving the inner cylinder 23 to move towards the reactor body 11. The water passage hole 22 and the water passage hole 24 gradually overlap, allowing the sulfonating agent to flow into the reactor body 11. The advantage of doing this is that it can control the rate of sulfonating agent addition, which is especially important when producing different quantities and types of ion exchange resins. It also achieves the sealing and closure of the feeding channel to prevent steam from overflowing during the reaction process.

[0027] After the raw materials are added, the sulfidation reaction is carried out. First, the constant temperature oil bath circulator 15 is started. The heat transfer medium (such as heat transfer oil) enters the spiral water channel 13 in the side wall of the reactor body 11 through the connecting water pipe 14, and flows into the hollow central shaft 12 at the same time. Since the inner cavity of the central shaft 12 is equipped with multiple partitions, and each partition cavity is connected by the corresponding stirring rod 121, the heat transfer medium can be evenly diffused to all parts of the reactor cavity through the stirring rod 121. With the spiral design of the water channel 13, the three-dimensional constant temperature heating of the reaction system is achieved, making the heating process more uniform and preventing local heating. Then, the motor 16 is started. Its power shaft drives the central shaft 12 to rotate at high speed in the inner cavity of the reactor body 11 through the meshing of bevel gear 17 and bevel gear 2 171. The hollow stirring rod 121 rotates synchronously with the central shaft 12. On the one hand, the material stratification is broken by mechanical stirring, and on the other hand, the heat transfer medium flowing by itself is used to further enhance the local temperature uniformity, solving the problem of excessive temperature difference between the edge and the center in traditional devices.

[0028] After the reaction is complete, turn off the motor 16 and the constant temperature oil bath circulator 15. After the main body of the reactor 11 cools down to room temperature (or the temperature required by the process), open the discharge port 112 to collect the product and finally complete the vulcanization process of the strong acid cation exchange resin.

[0029] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall be protected by the present utility model.

Claims

1. A sulfonation reaction device for monomer-modified strong acid cation exchange resin, comprising a reaction assembly (1) and a feed assembly (2), characterized in that: The reaction assembly (1) includes a reaction vessel body (11), with an inlet (111) and an outlet (112) respectively fixed at the top and bottom of the reaction vessel body (11). A central shaft (12) is rotatably connected to the center of the inner cavity of the reaction vessel body (11), and a stirring rod (121) is fixed to the outer periphery of the central shaft (12). The reaction assembly (1) includes a water channel (13), which is spirally opened inside the side wall of the reaction vessel body (11). A constant temperature oil bath circulator (15) is fixed at the top of the reaction vessel body (11). The reaction assembly (1) also includes a connecting water pipe (14). The constant temperature oil bath circulator (15), the water channel (13) and the central shaft (12) are circulated and connected through the connecting water pipe (14). The connection between the two ends of the central shaft (12) and the connecting water pipe (14) is through and rotatably connected. The reactor body (11) is also fixed with a motor (16) at the top. The motor (16) has a bevel gear (17) fixed on its power shaft. The central shaft (12) protrudes from one end of the reactor body (11) and has a bevel gear (171) that meshes with the bevel gear (17).

2. The sulfonation reaction device for monomer-modified strong acid cation exchange resin according to claim 1, characterized in that: A base (113) is also fixed on the outer periphery of the reactor body (11).

3. The sulfonation reaction device for monomer-modified strong acid cation exchange resin according to claim 1, characterized in that: The reactor body (11) is also fixed with a shell (18) at the top. The motor (16), the first bevel gear (17) and the second bevel gear (171) are all located inside the shell (18).

4. The sulfonation reaction device for monomer-modified strong acid cation exchange resin according to claim 1, characterized in that: Both the central shaft (12) and the stirring rod (121) are hollow. The inner cavity of the central shaft (12) is provided with multiple partitions, and the multiple partition cavities of the central shaft (12) are interconnected in sequence through the corresponding stirring rod (121).

5. The sulfonation reaction device for monomer-modified strong acid cation exchange resin according to claim 1, characterized in that: The feeding assembly (2) includes an outer cylinder (21) that is connected to the top of the reactor body (11). The outer cylinder (21) has several water passage holes (22) on its outer periphery. The inner cylinder (23) is provided in the inner cavity of the outer cylinder (21). The outer periphery of the inner cylinder (23) has water passage holes (24) corresponding to the water passage holes (22). An electric telescopic rod (25) is also fixed at the top of the reactor body (11). The telescopic end of the electric telescopic rod (25) is fixed to the inner cylinder (23) and protrudes from one end of the outer cylinder (21). When the inner cylinder (23) moves toward the reactor body (11), the water passage holes (22) and the water passage holes (24) gradually overlap.

6. The sulfonation reaction device for a monomer-modified strong acid cation exchange resin according to claim 5, characterized by: The feeding assembly (2) also includes a hopper (26), the outlet end of which extends into the inner cavity of the inner cylinder (23).

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