Reaction tank for preparing ion exchange membrane

Abstract

The utility model discloses a reaction tank for preparing an ion exchange membrane, belongs to the field of ion exchange membrane preparation devices, and solves the problem of large occupied space of an ion exchange membrane preparation production line in which one equipment unit is designed in each process in the prior art. The device comprises an outer tank body with an opening in the top, an inner tank body is arranged in the outer tank body, the outer edge of the inner tank body is connected with the outer tank body in a closed mode so that a heating cavity can be formed between the inner tank body and the outer tank body, and a heat-conducting medium inlet and a heat-conducting medium outlet which are communicated with the heating cavity are formed in the two sides of the outer tank body respectively. A reactant discharging pipe which penetrates through the heating cavity and extends into the inner cavity of the inner tank body is also arranged at the bottom of the outer tank body; a first winding and unwinding roller, a tensioning roller and a second winding and unwinding roller are rotationally arranged in an inner cavity of the inner groove body. According to the utility model, the intermittent production of unit operations such as continuous immersion and absorption (impregnation) of monomers and / or initiators, continuous polymerization reaction, continuous sulfonation and continuous swelling can be met, the equipment investment is reduced, and the process flexibility is improved.

Description

Technical Field

[0001] The utility model relates to the field of ion exchange membrane preparation devices, and more specifically, to a reaction tank for preparing ion exchange membranes. Background Art

[0002] Ion exchange membranes are thin films made of polymer materials with ion exchange properties. The surface of the ion exchange membrane is loaded with groups that can undergo ion exchange. For example, the cation exchange membrane is loaded with strongly acidic sulfonic acid groups (exchangeable cations), and the anion exchange membrane is loaded with strongly basic quaternary ammonium groups (exchangeable anions). Their unique ion exchange properties enable ion exchange membranes to play an important role in material separation, clean production, environmental protection, energy conversion, etc., and are widely used in many fields such as medicine and food, seawater desalination, coal chemical industry, chemical process transformation, and chemical wastewater treatment.

[0003] As a type of solid acid catalyst, ion exchange membranes have been widely used in organic synthesis. After decades of application, their structure has been continuously refined and their performance has been continuously enhanced. Because they are solid, they overcome the shortcomings of liquid acid catalysts. They also differ from cation exchange resins in that they exhibit greater catalytic activity than colloidal resins and a longer lifespan than large-pore resins. Their thin film form makes them less susceptible to breakage and reduces wear. Industrial production has proven that cationic membranes are excellent catalysts for esterification reactions. In addition to esterification, cationic membranes can also be used in isomerization and substituent transfer reactions, rearrangement reactions, alkylation reactions, acylation reactions, Diels-Alder reactions, Mukaiyama Aldol reactions, acetalization and ketal reactions, alcohol dehydration to ethers, etherification reactions between alcohols and olefins, ring-opening and ring-closure reactions, oligomerization and polymerization reactions, and hydration reactions.

[0004] There are many methods for preparing ion exchange membranes, including calendering, molding, dipping, casting, impregnation (impregnation), paddle coating, jacketing and blow molding. The impregnation (impregnation) method is convenient for forming and can continuously produce rolled ion membranes. Moreover, the performance of the membrane is better than that of heterogeneous membranes, and thus it is widely used in industry. The impregnation (impregnation) method for preparing ion exchange membranes needs to go through several steps. Taking the technical solution disclosed in Chinese patent CN 115770623 A (a method for preparing an ion exchange membrane for camphor esterification) as an example, the preparation of ion exchange membranes comprises the following steps:

[0005] (1) Take the base film and fix it in a reaction tank, add the impregnation liquid into the reaction tank, heat and soak it, and release the impregnation liquid in the reaction tank;

[0006] (2) Adding curing liquid into the reaction tank and heating it to soak, releasing the curing liquid in the reaction tank, and wiping the upper and lower surfaces of the film and the reaction tank dry;

[0007] (3) adding expansion liquid to the reaction tank, heating and soaking, and releasing the expansion liquid in the reaction tank;

[0008] (4) adding concentrated sulfuric acid to the reaction tank, heating and soaking, and releasing the concentrated sulfuric acid in the reaction tank after cooling;

[0009] (5) adding sulfuric acid of decreasing concentration into the reaction tank in multiple times, and draining the sulfuric acid in the reaction tank before adding sulfuric acid each time;

[0010] (6) Add clean water to the reaction tank for cleaning, and take out the film from the reaction tank.

[0011] Since the process of preparing ion exchange membranes by the impregnation (impregnation) method includes many steps, the existing production equipment generally designs an equipment unit for each step. If all the equipment units are integrated into a production line to achieve one-time continuous production, the length of the production line is too long and the equipment investment is high, making it difficult to promote on a large scale.

[0012] Therefore, it is urgent to design a reaction tank for preparing ion exchange membranes to solve the above technical problems. Utility Model Content

[0013] The technical problem to be solved by the present invention is to provide a reaction tank for preparing ion exchange membranes in response to the above-mentioned deficiencies in the prior art, which can meet the intermittent production of unit operations such as continuous absorption (impregnation) of monomers and / or initiators, continuous polymerization reaction, continuous sulfonation and continuous swelling, thereby reducing equipment investment and improving process flexibility.

[0014] The technical solution of the present utility model is as follows: a reaction tank for preparing ion exchange membranes, comprising an outer tank body with an opening at the top, an inner tank body arranged in the outer tank body, the outer edge of the inner tank body being sealed and connected to the outer tank body to form a heating chamber therebetween, a heat transfer medium inlet and a heat transfer medium outlet being respectively arranged on both sides of the outer tank body and communicating with the heating chamber, a reactant discharge pipe penetrating the heating chamber and extending to the inner cavity of the inner tank body is also arranged at the bottom of the outer tank body; a first retracting roller, a tensioning roller and a second retracting roller are respectively rotatably arranged in the inner cavity of the inner tank body, the first retracting roller, the tensioning roller and the second retracting roller are arranged in parallel in sequence, and the first retracting roller and the second retracting roller are respectively driven to rotate by a first driving mechanism and a second driving mechanism arranged outside the outer tank body.

[0015] As a further improvement, the inner trough body is a U-shaped partition with a U-shaped cross-section. The length and height of the U-shaped partition are smaller than the length and height of the outer trough body. The width of the U-shaped partition is adapted to the width of the outer trough body, and the two ends of the U-shaped partition in the width direction are welded and fixed to the two ends of the outer trough body in the width direction. The two ends of the opening of the U-shaped partition are welded and fixed to the top of the outer trough body through a sealing plate, and the two ends of the first retracting roller, the tensioning roller and the second retracting roller are rotatably connected to the two ends of the outer trough body in the width direction.

[0016] Furthermore, a fastening bolt is inserted into one end of the outer trough body in the width direction, a sealing gasket is provided between the nut of the fastening bolt and the outer wall of the outer trough body, a locking nut is threadedly connected to the fastening bolt in the outer trough body, one end of the first retracting roller and the second retracting roller are movably sleeved on the fastening bolt, the output ends of the first driving mechanism and the second driving mechanism are provided with square joints, the other ends of the first retracting roller and the second retracting roller are provided with square grooves adapted to the square joints, and the square joints are slidably inserted in the square grooves.

[0017] Furthermore, the first drive mechanism and the second drive mechanism have the same structure, both including a drive motor and a transmission shaft, the output end of the drive motor is connected to one end of the transmission shaft, the other end of the transmission shaft passes through the outer trough body and is connected to the square joint, and a mechanical sealing device is provided between the transmission shaft and the outer trough body.

[0018] Furthermore, the mechanical sealing device includes a stationary ring seat, a stationary ring and a dynamic ring, the stationary ring seat is fixed on the outer groove body, the stationary ring is inserted in the stationary ring seat, and the transmission shaft is rotatably installed in the stationary ring, and a pressure cover is provided on one side of the stationary ring to press it into the stationary ring seat, the pressure cover is connected to the stationary ring seat by screws, the dynamic ring fixing sleeve is set on the transmission shaft, and one end of the dynamic ring is in contact with one end of the stationary ring.

[0019] Furthermore, a mounting plate is provided on one side of the outer trough corresponding to the first and second retracting rollers, the driving motor is mounted on the mounting plate, a bearing seat 1 is further provided on the mounting plate, and the transmission shaft is rotatably mounted in the bearing seat 1.

[0020] Furthermore, there are three tensioning rollers, and the three tensioning rollers are distributed in a triangular shape between the first retractable roller and the second retractable roller, and both ends of each tensioning roller are connected to the outer tank body through bearing seat 2.

[0021] Furthermore, heat transfer medium distribution pipes are provided at both ends of the heating chamber, and the heat transfer medium inlet and the heat transfer medium outlet are respectively connected to a corresponding heat transfer medium distribution pipe.

[0022] Furthermore, the bottom of the outer tank is also provided with a heat-conducting medium discharge port connected to the heating chamber.

[0023] Furthermore, the outer wall of the outer tank is covered with a thermal insulation layer.

[0024] Beneficial effects

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] 1. The reaction tank of the utility model can meet the intermittent production of unit operations such as continuous absorption (impregnation) of monomers and / or initiators, continuous polymerization reaction, continuous sulfonation and continuous swelling. Only one reaction tank is needed to complete the production, reducing equipment investment and improving process flexibility.

[0027] 2. The reaction tank of the utility model adopts two driving mechanisms to drive the two retracting rollers to rotate respectively, which can drive the carrier film to unfold back and forth repeatedly in the reaction tank. By controlling the contact time between the carrier film and the reagent in the tank, the uniformity and quality consistency of the ion exchange membrane loaded on the carrier film are improved.

[0028] 3. The reaction tank of the utility model adopts two driving mechanisms to drive the two reeling rollers to rotate respectively. The tension in the reeling and unreeling process can be adjusted by adjusting the torque difference between the two motors, thereby preventing the ion membrane from being deformed too much during the production process. At the same time, the workload of the operators during the preparation of the anion and cation membranes is reduced, thereby improving the production efficiency and yield rate of the anion and cation membranes. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0030] Figure 2 This is a schematic diagram of the top structure of the utility model;

[0031] Figure 3 for Figure 2 A schematic diagram of the structure at center A;

[0032] Figure 4 for Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0033] Figure 5 This is a side structural diagram of the present utility model;

[0034] Figure 6 It is an enlarged schematic diagram of the structure of the mechanical sealing device in the present invention.

[0035] Among them: 1-outer trough body, 2-inner trough body, 3-heating chamber, 4-heat conducting medium inlet, 5-heat conducting medium outlet, 6-heat conducting medium exhaust port, 7-first retracting roller, 8-tensioning roller, 9-second retracting roller, 10-fastening bolt, 11-sealing gasket, 12-locking nut, 13-square joint, 14-drive motor, 15-drive shaft, 16-mechanical sealing device, 17-mounting plate, 18-bearing seat 1, 19-bearing seat 2, 20-heat conducting medium distribution pipe, 21-reactant discharge pipe, 22-carrier film, 161-stationary ring seat, 162-stationary ring, 163-dynamic ring, 164-pressure cover. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0037] See Figure 1-6 The present invention is a reaction tank for preparing ion exchange membrane, comprising an outer tank body 1 with an opening at the top, an inner tank body 2 is arranged in the outer tank body 1, the outer edge of the inner tank body 2 is sealed and connected to the outer tank body 1 to form a heating chamber 3 between the two, and a heat transfer medium inlet 4 and a heat transfer medium outlet 5 are respectively provided on both sides of the outer tank body 1 and connected to the heating chamber 3, and the heat transfer medium inlet 4 and the heat transfer medium outlet 5 are respectively connected to the heat transfer medium circulation pipe through flanges, and a heat transfer medium is further provided at the bottom of the outer tank body 1, which penetrates the heating chamber 3 and extends to the inner tank body 2. The reactant discharge pipe 21 in the inner cavity of the tank body 2 is used to discharge the reactants; a first retracting roller 7, a tensioning roller 8 and a second retracting roller 9 are respectively rotated in the inner cavity of the inner tank body 2, the first retracting roller 7 and the second retracting roller 9 are respectively used to place the carrier film 22, and the tensioning roller 8 is used to tension the carrier film 22. The first retracting roller 7, the tensioning roller 8 and the second retracting roller 9 are arranged in parallel in sequence, and the first retracting roller 7 and the second retracting roller 9 are respectively driven to rotate by a first drive mechanism and a second drive mechanism arranged on the outside of the outer tank body 1.

[0038] Preferably, the inner tank body 2 is a U-shaped partition with a U-shaped cross-section, and there are no sealing plates on both sides of the width direction of the U-shaped partition. The length and height of the U-shaped partition are smaller than the length and height of the outer tank body 1. The width of the U-shaped partition is adapted to the width of the outer tank body 1, so that the inner tank body 2 can be inserted into the outer tank body 1, and the two ends of the width direction of the U-shaped partition are welded and fixed to the two ends of the width direction of the outer tank body 1, and the two opening ends of the U-shaped partition are welded and fixed to the top of the outer tank body 1 through sealing plates, thereby forming the heating chamber 3, and the two ends of the first retracting roller 7, the tensioning roller 8 and the second retracting roller 9 are rotatably connected to the two ends in the width direction of the outer tank body 1, while satisfying the ability to heat the reactants in the inner tank body 2, the support stability of the first retracting roller 7, the tensioning roller 8 and the second retracting roller 9 can be better.

[0039] Preferably, a fastening bolt 10 is inserted at one end in the width direction of the outer trough body 1, and a sealing gasket 11 is provided between the nut of the fastening bolt 10 and the outer wall of the outer trough body 1 to ensure sealing performance. A locking nut 12 is threadedly connected to the fastening bolt 10 in the outer trough body 1, and the fastening bolt 10 can be fastened to the outer trough body 1. One end of the first retracting roller 7 and the second retracting roller 9 are movably sleeved on the fastening bolt 10, and the end of the fastening bolt 10 that contacts the first retracting roller 7 and the second retracting roller 9 can be set as a light rod, so that the first retracting roller 7 and the second retracting roller 9 rotate more smoothly. A square joint 13 is provided at the output end of the first driving mechanism and the second driving mechanism, and the other end of the first retracting roller 7 and the second retracting roller 9 is provided with a square groove compatible with the square joint 13, wherein the square joint 13 is slidably inserted into the square groove. A fastening bolt 10 is used to support one end of the first retracting roller 7 and the second retracting roller 9, and a square joint 13 is used to drive the first retracting roller 7 and the second retracting roller 9, which meets the demand of driving the first retracting roller 7 and the second retracting roller 9 to rotate, facilitates disassembly and maintenance, and is more convenient to use.

[0040] Preferably, the first drive mechanism and the second drive mechanism have the same structure, both including a drive motor 14 and a transmission shaft 15, wherein the output end of the drive motor 14 is connected to one end of the transmission shaft 15, the other end of the transmission shaft 15 passes through the outer tank body 1 and is connected to the square joint 13, and a mechanical sealing device 16 is provided between the transmission shaft 15 and the outer tank body 1 to ensure sealing. Furthermore, the mechanical sealing device 16 includes a stationary ring seat 161, a stationary ring 162 and a dynamic ring 163, wherein the stationary ring seat 161 is fixed on the outer tank body 1, the stationary ring 162 is inserted in the stationary ring seat 161, and the transmission shaft 15 is rotatably installed in the stationary ring 162, and a pressure cover 164 is provided on one side of the stationary ring 162 to press it into the stationary ring seat 161, one end of the stationary ring 162 is exposed on the outside of the pressure cover 164, and the pressure cover 164 is connected to the stationary ring seat 161 by screws, which is convenient for disassembly and maintenance, and the dynamic ring 163 is fixedly sleeved on the transmission shaft 15, and one end of the dynamic ring 163 is in contact with one end of the stationary ring 162. The dynamic ring 163 and the stationary ring 162 are both made of wear-resistant materials, such as silicon carbide, and the contact surfaces between the two have the surface precision of a rotating seal. The dynamic ring 163 rotates with the transmission shaft 15, and the transmission shaft 15 and the dynamic ring 163 rotate relative to the stationary ring 162 to achieve a rotating seal. In other embodiments, the mechanical sealing device 16 may also be a sealed bearing.

[0041] The reaction tank of this embodiment uses two drive mechanisms to respectively drive the two rewinding and unwinding rollers to rotate, which can drive the carrier film to repeatedly unfold back and forth within the reaction tank. By controlling the contact time between the carrier film and the reagent in the tank, the uniformity and quality consistency of the ion exchange membrane loaded on the carrier film are improved. At the same time, the torque difference between the two motors can be adjusted to adjust the tension during the rewinding and unwinding process, preventing the ion exchange membrane from excessive dimensional deformation during the production process. This also reduces the workload of operators during the preparation of anionic and cationic membranes, thereby improving the production efficiency and yield rate of anionic and cationic membranes.

[0042] Preferably, a mounting plate 17 is provided on one side of the outer trough body 1 corresponding to the first retracting roller 7 and the second retracting roller 9, wherein the drive motor 14 is mounted on the mounting plate 17, and a bearing seat 18 is also provided on the mounting plate 17, and the transmission shaft 15 is rotatably mounted in the bearing seat 18, which facilitates the installation of the drive motor 14 and improves the transmission stability of the transmission shaft 15.

[0043] Preferably, there are three tensioning rollers 8, and the three tensioning rollers 8 are distributed in a triangular shape between the first retracting roller 7 and the second retracting roller 9. Both ends of each tensioning roller 8 are connected to the outer tank body 1 through the bearing seat 2 19. The carrier film passes through the three tensioning rollers 8 in turn to achieve tensioning of the carrier film.

[0044] Preferably, a heat conducting medium distribution pipe 20 is provided at both ends of the heating chamber 3, and the heat conducting medium inlet 4 and the heat conducting medium outlet 5 are respectively connected to a heat conducting medium distribution pipe 20. The end of the heat conducting medium distribution pipe 20 away from the heat conducting medium inlet 4 and the heat conducting medium outlet 5 is an open structure, and a plurality of distribution holes are also provided along its axial direction to ensure that the heat conducting medium is evenly distributed inside the heating chamber, thereby improving the uniformity of the temperature at each point in the reaction tank cavity.

[0045] Preferably, a heat conduction medium drain port 6 communicating with the heating chamber 3 is provided at the bottom of the outer tank body 1, so that the heat conduction medium can be completely drained during maintenance. Furthermore, an insulation layer is coated on the outer wall of the outer tank body 1 to prevent heat loss.

[0046] When the reaction tank of the utility model is in use, Figure 1 As shown, a carrier film 22 of a specific length and width is rolled onto a first retractable roller 7, and the carrier film 22 is pulled through three tensioning rollers 8 in the reaction tank at one time, and then one end of the carrier film 22 is fixed to a second retractable roller 9;

[0047] Taking the preparation of strong acid styrene cation exchange resin as an example, the prepared styrene resin monomer is injected into the inner tank body 2 so that the liquid level is above the tensioning roller 8 at the upper end, and then the heat transfer medium is transported from the heat transfer medium inlet 4 into the heating chamber 3, and flows out from the heat transfer medium outlet 5 after passing through the heating chamber 3 to form a circulating heat transfer medium. By controlling the flow rate, pressure and other parameters of the heat transfer medium, the styrene resin monomer is heated and kept warm according to the specified process conditions. After the styrene resin monomer in the inner tank body 2 reaches the specified process temperature, the first drive mechanism corresponding to the drive motor 14 drives the first retracting roller 7, and the carrier film 22 is rolled up with the first retracting roller 7. The roller 7 rotates, continuously feeding the carrier film 22 into the inner tank body 1, so that the film passes through the monomer solution evenly. At the same time, the second retracting roller 9 is driven by the drive motor 14 corresponding to the second drive mechanism, and the carrier film 22 is synchronously rolled onto the second retracting roller 9. When the carrier film 22 on the first retracting roller 7 is completely unwound and transferred to the second retracting roller 9, the two drive motors are controlled to reverse, so that the retracting and unwinding functions of the first retracting roller 7 and the second retracting roller 9 are reversed. That is, at this time, the second retracting roller 9 continuously feeds the carrier film 22 into the inner tank body 2 by rotating, and the first retracting roller 7 synchronously retracts the carrier film 22.

[0048] In the actual process, the carrier film 22 roll can be controlled to be continuously retracted and retracted between the first retracting roller 7 and the second retracting roller 9 according to the process requirements until the carrier film 22 roll reaches the set absorption amount, so that the base film on the carrier film is more uniform and the coverage of the base film composed of the ion exchange resin on the carrier film is improved. At this time, the drive motor 14 is turned off and the introduction of the heat transfer medium is stopped. After the styrene resin monomer in the reaction tank is cooled, the residual liquid in the reaction tank is discharged through the reactant discharge pipe 21;

[0049] According to the process requirements, the carrier film 22 in the reaction tank can be taken out for processing, and the above operation can be repeated after completion. According to different subsequent processes, different reagents are injected into the reaction tank. By controlling the number of times the carrier film 22 is rolled back and forth in the reaction tank, the immersion time and immersion amount of the carrier film 22 can be controlled. After intermittent operation of multiple steps, such as using swelling agents, sulfonation or chloromethylation / quaternization in sequence, the carrier film 22 is swollen and functionalized in the tank according to the corresponding process conditions to obtain the final ion exchange membrane product.

[0050] The reaction tank of the present invention drives two take-up and unwinding rollers to rotate through a motor, pulling the carrier film 22 to be repeatedly unwound and rewound in the reaction tank, which can meet the intermittent production of unit operations such as continuous absorption (impregnation) of monomers and / or initiators, continuous polymerization reaction, continuous sulfonation and continuous swelling. Only one reaction tank is needed to complete the production, which reduces equipment investment, improves process flexibility, and greatly improves production efficiency.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A reaction tank for preparing an ion exchange membrane, characterized in that: The invention comprises an outer tank body (1) with an opening at the top, an inner tank body (2) is arranged in the outer tank body (1), the outer edge of the inner tank body (2) is sealed and connected to the outer tank body (1) to form a heating chamber (3) therebetween, a heat transfer medium inlet (4) and a heat transfer medium outlet (5) are respectively arranged on both sides of the outer tank body (1) and communicate with the heating chamber (3), and a reactant discharge pipe (21) is also provided at the bottom of the outer tank body (1) which passes through the heating chamber (3) and extends to the inner chamber of the inner tank body (2); the inner chamber of the inner tank body (2) is respectively provided with a first retractable roller (7), a tensioning roller (8) and a second retractable roller (9), the first retractable roller (7), the tensioning roller (8) and the second retractable roller (9) are arranged in parallel in sequence, and the first retractable roller (7) and the second retractable roller (9) are respectively driven to rotate by a first driving mechanism and a second driving mechanism arranged outside the outer tank body (1).

2. A reaction tank for preparing an ion exchange membrane according to claim 1, characterized in that: The inner tank body (2) is a U-shaped partition with a U-shaped cross-section. The length and height of the U-shaped partition are both smaller than the length and height of the outer tank body (1). The width of the U-shaped partition is adapted to the width of the outer tank body (1), and the two ends of the width direction of the U-shaped partition are welded and fixed to the two ends of the width direction of the outer tank body (1). The two ends of the opening of the U-shaped partition are welded and fixed to the top of the outer tank body (1) through a sealing plate. The two ends of the first retracting roller (7), the tensioning roller (8) and the second retracting roller (9) are all rotatably connected to the two ends of the width direction of the outer tank body (1).

3. A reaction tank for preparing an ion exchange membrane according to claim 2, characterized in that: A fastening bolt (10) is inserted into one end of the outer trough body (1) in the width direction, and a sealing gasket (11) is provided between the nut of the fastening bolt (10) and the outer wall of the outer trough body (1). A locking nut (12) is threadedly connected to the fastening bolt (10) in the outer trough body (1). One end of the first retractable roller (7) and the second retractable roller (9) are movably sleeved on the fastening bolt (10). The output ends of the first driving mechanism and the second driving mechanism are provided with a square joint (13). The other ends of the first retractable roller (7) and the second retractable roller (9) are provided with a square groove adapted to the square joint (13), and the square joint (13) is slidably inserted into the square groove.

4. A reaction tank for preparing an ion exchange membrane according to claim 3, characterized in that: The first drive mechanism and the second drive mechanism have the same structure, both comprising a drive motor (14) and a transmission shaft (15), wherein the output end of the drive motor (14) is connected to one end of the transmission shaft (15), the other end of the transmission shaft (15) passes through the outer tank body (1) and is connected to the square joint (13), and a mechanical sealing device (16) is provided between the transmission shaft (15) and the outer tank body (1).

5. A reaction tank for preparing an ion exchange membrane according to claim 4, characterized in that: The mechanical sealing device (16) includes a stationary ring seat (161), a stationary ring (162) and a dynamic ring (163), wherein the stationary ring seat (161) is fixed on the outer tank body (1), the stationary ring (162) is inserted into the stationary ring seat (161), and the transmission shaft (15) is rotatably installed in the stationary ring (162), and a pressure cover (164) is provided on one side of the stationary ring (162) for pressing it into the stationary ring seat (161), and the pressure cover (164) is connected to the stationary ring seat (161) by screws, and the dynamic ring (163) is fixedly sleeved on the transmission shaft (15), and one end of the dynamic ring (163) is in contact with one end of the stationary ring (162).

6. A reaction tank for preparing an ion exchange membrane according to claim 4, characterized in that: A mounting plate (17) is provided on one side of the outer trough body (1) corresponding to the first retracting roller (7) and the second retracting roller (9), the driving motor (14) is mounted on the mounting plate (17), and a bearing seat (18) is also provided on the mounting plate (17), and the transmission shaft (15) is rotatably mounted in the bearing seat (18).

7. The reaction tank for preparing an ion exchange membrane according to claim 1, characterized in that: There are three tensioning rollers (8) in total, and the three tensioning rollers (8) are distributed in a triangular shape between the first retracting roller (7) and the second retracting roller (9). Both ends of each tensioning roller (8) are connected to the outer tank body (1) through a second bearing seat (19).

8. The reaction tank for preparing an ion exchange membrane according to claim 1, characterized in that: Heat-conducting medium distribution pipes (20) are further provided at both ends of the heating chamber (3), and the heat-conducting medium inlet (4) and the heat-conducting medium outlet (5) are respectively connected to a corresponding heat-conducting medium distribution pipe (20).

9. A reaction tank for preparing an ion exchange membrane according to any one of claims 1 to 8, characterized in that: The bottom of the outer tank body (1) is also provided with a heat-conducting medium drain port (6) communicating with the heating chamber (3).

10. The reaction tank for preparing an ion exchange membrane according to claim 9, characterized in that: The outer wall of the outer tank body (1) is covered with a heat-insulating layer.

Images