Reaction system suitable for pre-irradiation grafting

Abstract

The invention belongs to a material composite modification device, and discloses a reaction system suitable for pre-irradiation grafting, the reaction system comprises a reaction kettle body and a reaction kettle cover, the bottom end of the reaction kettle body is provided with a discharge interface, and a ventilation-discharge integrated device is installed through the discharge interface; the ventilating-discharging integrated device is composed of a porous ventilating mechanism, an inert gas introducing mechanism and a discharging mechanism; the inert gas introduction mechanism and the porous ventilation mechanism can realize rapid stirring of gas flow of reaction liquid and timely discharge of air; the discharging mechanism can directly discharge waste liquid after the reaction is finished, the problem that the liquid is difficult to discharge due to the fact that the reaction liquid is too heavy during a large amount of reaction is avoided, and the waste liquid is directly discharged into the waste liquid barrel so that toxic and harmful gas and liquid can be prevented from making contact with experimenters to the maximum extent. Therefore, the method can realize uniform stirring of different reaction liquids such as solution, emulsion and suspension while ensuring high irradiation grafting rate, and is suitable for industrial pre-irradiation grafting reaction amplification.

Description

Technical Field

[0001] The invention belongs to a material composite modification device, and in particular relates to a reaction system suitable for pre-irradiation grafting. Background Art

[0002] Radiation grafting is a method that uses high-energy radiation (such as electron beams, gamma rays, and ultraviolet rays) to generate free radicals in the polymer skeleton, and then grafts vinyl monomers onto the polymer skeleton through free radical polymerization to form side chains to prepare grafted copolymers. The main advantages of radiation grafting technology include: radiation grafting is easier to master, operate, and control than general chemical grafting; the radiation grafting reaction can control the grafting rate according to the radiation dose and other methods as needed; the radiation grafting reaction is initiated by radiation, and no initiator needs to be added to the grafting system, so a very pure grafted polymer can be obtained. Radiation grafting can be divided into co-irradiation and pre-irradiation. Among them, the pre-irradiation grafting method does not need to purchase expensive radiation sources because irradiation and grafting are two independent processes, and the research and production units do not need to purchase expensive radiation sources, so it is economical and applicable. In addition, in the pre-irradiation grafting method, the monomers are not directly irradiated, which minimizes the homopolymerization reaction and controls the formation of homopolymers.

[0003] Radiation grafting technology can improve the performance of traditional membrane materials, so it is widely used in industry. It is commonly used to improve the flame retardancy, hydrophilicity and dyeing properties of fibers, prepare high-quality homogeneous ion exchange membranes, synthesize new medical polymer materials, improve the surface properties of polymers, and perform radiation grafting modification on inorganic materials, etc.

[0004] Although the pre-irradiation grafting method is simple and easy to operate, since the polymer skeleton is a thin film or powder solid, but the grafted monomer is a liquid, the overall reaction is a heterogeneous reaction, which is prone to uneven grafting. In order to increase the grafting rate, the monomer needs to be mixed with water and surfactant to form a suspension, which greatly increases the degree of uneven grafting. The uneven grafting phenomenon greatly reduces the overall performance of the material, brings differences in the thickness and surface roughness of the film sample, makes the grafting rate of the film or powder sample uneven, and the sample performance varies greatly.

[0005] In order to avoid uneven grafting, magnetic stirring is usually applied at the bottom of the reaction, but the magnetic stirring force is small, making it difficult to stir the entire film immersed area evenly, and excessive magnetic stirring force can easily damage the morphology and integrity of the film sample. Mechanical stirring also has a certain effect, but the depth of the stirring paddle should not be too deep, otherwise the film sample will be broken. It can be seen that neither magnetic stirring nor mechanical stirring can achieve the purpose of uniformly stirring the reaction liquid in pre-irradiation grafting, and this situation is more obvious in reactors with a volume greater than 10 liters. Summary of the invention

[0006] The present invention aims to solve the technical problem of uneven grafting in existing pre-irradiation grafting reactors, and provides a reaction system suitable for pre-irradiation grafting. By using the dual functions of bottom air intake stirring as the main function and top mechanical stirring as the auxiliary function, the pre-irradiation grafting reaction can achieve uniform reaction in three conditions: solution, emulsion or suspension, and can be used for the pre-irradiation grafting reaction of thin films or powders.

[0007] In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

[0008] The present invention provides a reaction system suitable for pre-irradiation grafting, comprising a reaction kettle body and a reaction kettle cover installed on the top of the reaction kettle body; a discharge interface is provided at the bottom of the reaction kettle body, and a ventilation-discharge integrated device is installed through the discharge interface, and the ventilation-discharge integrated device consists of a porous ventilation mechanism, an inert gas introduction mechanism, and a discharge mechanism;

[0009] The inert gas introduction mechanism comprises an inert gas pipeline, the upper part of which is provided with a support body, and the lower end of which is connected with an inert gas inlet interface; a discharge control valve is installed at the lower part of the inert gas pipeline, and the inert gas pipeline can be controlled to move upward or downward relative to the limiting inner tube by rotating the discharge control valve;

[0010] The porous ventilation mechanism is located above the inert gas inlet mechanism; the porous ventilation mechanism comprises a ventilation body coaxially arranged with the inert gas pipeline, the ventilation body is a cylinder with a spherical cap on the top; the ventilation body is provided with a central gas channel connected with the inert gas pipeline, the central gas channel is connected with a plurality of top gas outlets and a plurality of side gas outlets, the top gas outlet is arranged at the top of the ventilation body, and the central gas channel is connected with the inner cavity of the reactor body, the side gas outlet is at the side of the ventilation body, and the central gas channel is connected with the inner cavity of the reactor body;

[0011] The discharge mechanism comprises an outer discharge tube, a limiting inner tube, a discharge sealing ring, an outer tube sealing ring and an inner tube sealing ring which are coaxially arranged with the inert gas pipeline; the top interface of the outer discharge tube is used to dock with the discharge interface at the bottom end of the reactor body, and the outer discharge tube and the discharge interface are sealed by the outer tube sealing ring; the bottom of the outer discharge tube forms a closed bottom surface outside the limiting inner tube; the inner diameter of the outer discharge tube is larger than the outer diameter of the inert gas introduction mechanism, so that an annulus is formed between the outer discharge tube and the inert gas introduction mechanism, and the annulus is used for the outflow of liquid in the cavity of the reactor body; a discharge adapter is arranged on the bottom side of the outer discharge tube and is inclined downward, and the discharge adapter is connected with the annulus; the middle part of the limiting inner tube is integrally connected with the bottom end of the outer discharge tube, and the limiting inner tube is axially arranged between the support body and the discharge control The valves are connected up and down, and the limiting inner tube is used to allow the inert gas pipeline to pass through; the limiting inner tube and the support body are sealed by the inner tube sealing ring; the discharge sealing ring is installed on the upper surface of the support body and supported by the support body, and the outer diameter of the discharge sealing ring is larger than the outer diameter of the support body; when the discharge sealing ring moves with the inert gas pipeline to the sealing ring groove at the bottom of the reactor body, the discharge sealing ring will be sealed and matched with the sealing ring groove to achieve the closure of the discharge at the bottom of the reactor body; when the discharge sealing ring moves with the inert gas pipeline to below the sealing ring groove, the discharge at the bottom of the reactor body is opened, and the liquid in the inner cavity of the reactor body can pass through the discharge interface, and flow into the discharge adapter along the annulus between the discharge outer tube and the inert gas introduction mechanism, and be discharged from the reaction system through the discharge adapter.

[0012] Furthermore, the reactor body is installed in a reactor support vehicle, which is composed of four columns and four-layer supports installed on the four columns. The four-layer supports are, from bottom to top, a first-layer support, a second-layer support, a third-layer support, and a fourth-layer support; wheels are provided at the bottom of the first-layer support; the second-layer support and the third-layer support are used to adjust the height of the reactor body and then fix the reactor body; the fourth-layer support is used to fix the agitator motor.

[0013] Furthermore, the second-layer bracket includes a square flat plate and a center hole set on the square flat plate, the diameter of the center hole is smaller than the outer diameter of the reactor body, so that the bottom of the reactor body can be seated on the center hole, and the second-layer bracket supports the bottom of the reactor body; the third-layer bracket includes a square frame and a circular clamp connected to the square frame, and the circular clamp is used to fix the upper part of the reactor body to achieve the support of the third-layer bracket to the upper part of the reactor body; the second-layer bracket and the third-layer bracket are both connected to four columns through an adjusting component, and the adjusting component can slide up and down relative to the four columns and be fixed after sliding into place.

[0014] Furthermore, the reactor cover is provided with a stirring paddle inlet, and the stirring paddle inlet is used to pass a stirring rod, the upper end of the stirring rod is connected to the stirrer motor, and the lower end is connected to the stirring paddle, and the height of the stirring paddle inside the reactor body can be adjusted by the stirring rod.

[0015] Furthermore, a circulating heating pipe sleeve is provided on the inner wall of the reactor body, and the circulating heating pipe sleeve is provided with a circulating water inlet and a circulating water outlet.

[0016] Furthermore, the support body is coaxially arranged with the inert gas pipeline and has an increased outer diameter relative to the inert gas pipeline.

[0017] Furthermore, the inert gas introduction mechanism and the porous ventilation mechanism are integrally formed.

[0018] Furthermore, the plurality of groups of side air outlet holes are distributed at intervals along the axial direction of the ventilation body, and the plurality of groups of side air outlet holes in each group are evenly distributed along the circumference of the ventilation body.

[0019] Furthermore, each of the side air outlet holes extends obliquely downward from the central gas channel to the outer wall of the ventilation body, and the inclination angle of the side air outlet hole relative to the horizontal plane is 30° to 60°.

[0020] Furthermore, the bottom of the ventilation body is fixed to the top surface of the support body, and the outer diameter of the ventilation body is smaller than the outer diameter of the support body.

[0021] The beneficial effects of the present invention are:

[0022] The present invention is suitable for a reaction system for pre-irradiation grafting. While ensuring a high irradiation grafting rate, it can achieve uniform stirring of different reaction liquids such as solutions, emulsions, suspensions, etc., so as to improve the uniformity of the overall reaction, thereby improving the practical value of the reaction system. The reaction system can be used for irradiation grafting reaction and post-treatment, and is provided with a mobile device and a discharge port, which is suitable for industrial pre-irradiation grafting reaction amplification.

[0023] The reaction system is additionally provided with an integrated ventilation-discharging device, which is composed of a porous ventilation mechanism, an inert gas introduction mechanism and a discharging mechanism, and can be disassembled and cleaned after the reaction is completed; the inert gas introduction mechanism and the porous ventilation mechanism can realize rapid stirring of the airflow of the reaction liquid and timely discharge of the air; the discharging mechanism can directly discharge the waste liquid after the reaction is completed, and the problem of difficulty in discharging the reaction liquid due to excessive weight of the reaction liquid is avoided during a large number of reactions, and the waste liquid is directly discharged into the waste liquid barrel to avoid the contact between toxic and harmful gases and liquids and the experimenters to the greatest extent; in addition, the reactor is provided with a circulating heating pipe sleeve, which can quickly heat the reactor to meet the reaction conditions; the reactor support vehicle can be used for moving the reactor, and the reactor support vehicle is divided into four layers, which are respectively used to fix the stirrer motor, the reactor body, the reactor bottom, and the bottom movable wheels, and the middle two layers can adjust the reactor height by sliding in the vertical direction, which is convenient for the installation, disassembly and modulation of the reactor; the reactor cover is sealed and connected to the reactor through a circular clamp, which is easy to put in and remove large samples, and at the same time ensures the sealing of the reaction system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of a reaction system suitable for pre-irradiation grafting provided in an embodiment of the present invention.

[0025] Figure 2 This is a top view of the second-layer support in the reaction system provided in an embodiment of the present invention.

[0026] Figure 3 This is a top view of the third-layer support in the reaction system provided in an embodiment of the present invention.

[0027] Figure 4 This is a top view of the fourth-layer support in the reaction system provided in an embodiment of the present invention.

[0028] Figure 5 This is a top view of a reactor cover in a reaction system provided in an embodiment of the present invention.

[0029] Figure 6 This is a schematic diagram of the structure of the integrated ventilation and discharging device in the reaction system provided in an embodiment of the present invention.

[0030] Figure 7 This is a schematic diagram of the structure of the porous ventilation mechanism and the inert gas introduction mechanism in the reaction system provided in an embodiment of the present invention.

[0031] Figure 8 This is a schematic diagram of the structure of a discharge mechanism in a reaction system provided in an embodiment of the present invention.

[0032] Figure 1Middle: 1. Agitator motor; 2. Fourth-layer bracket; 3. Agitator rod; 4. Sealing cover; 5. Multi-function valve; 6. Reactor cover; 7. Circulating water outlet; 8. Agitator paddle; 9. Third-layer bracket, 91. Square frame, 92. Round clamp; 10. Circulating heating pipe sleeve; 11. Multi-hole ventilation mechanism; 111. Ventilation body, 112. Central gas channel, 113. Top outlet, 114. Side outlet; 12. Second-layer bracket, 121. Square plate, 122. Central hole; 13. Discharge mechanism. 131. Discharge sealing ring , 132. Outer discharge tube, 133. Limiting inner tube, 134. Discharge transfer interface, 135. Outer tube sealing ring, 136. Inner tube sealing ring; 14. Inert gas introduction mechanism, 141. Inert gas pipeline, 142. Support body, 143. Inert gas inlet interface, 144. Discharge control valve; 15. First layer bracket; 16. Wheel; 17. Reactor support vehicle; 18. Agitator inlet; 19. Reactor body, 191: Discharge interface, 192: Sealing ring slot; 20. Circulating water inlet; 21. Ventilation-discharge integrated device. DETAILED DESCRIPTION

[0033] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0034] See also Figure 1 As shown, this embodiment provides a reaction system suitable for pre-irradiation grafting, which mainly includes a reactor support vehicle 17, wheels 16, a reactor body 19, a reactor cover 6, an agitator motor 1, a stirring rod 3, a stirring paddle 8, a multi-function valve 5, a sealing cover 4, a circulating heating pipe sleeve 10, a circulating water inlet 20, a circulating water outlet 7, a ventilation-discharging integrated device 21, etc.

[0035] The reactor support vehicle 17 comprises four layers, and is composed of four columns and four layers of supports installed on the four columns. The four layers of supports are, from bottom to top, a first layer support 15, a second layer support 12, a third layer support 9, and a fourth layer support 2.

[0036] The bottom of the first-layer support 15 is provided with wheels 16 for moving the entire reaction system.

[0037] The second-layer support 12 and the third-layer support 9 enable the reactor body 19 to slide up and down along the reactor support vehicle 17 , so as to adjust the height of the reactor body 19 and then fix the reactor body 19 .

[0038] As a preferred embodiment of the present invention: Figure 2As shown, the second-layer support 12 includes a square plate 121 and a center hole 122 provided in the square plate 121. The diameter of the center hole 22 is smaller than the outer diameter of the reactor body 19, so that the spherical bottom of the reactor body 19 can be seated in the center hole 22, thereby achieving stable support of the bottom of the reactor body 19 by the second-layer support 12. Figure 3 As shown, the third-layer bracket 9 includes a square frame 91 and a circular clamp 92 connected to the square frame 91. The circular clamp 92 is used to fix the upper part of the reactor body 19, so as to achieve stable support of the upper part of the reactor body 19 by the third-layer bracket 9. The second-layer bracket 12 and the third-layer bracket 9 are connected to the four columns through an adjustment component. The adjustment component can slide up and down relative to the four columns and be fixed after sliding into place to achieve adjustment of the height position of the reactor body 19.

[0039] like Figure 4 As shown, the fourth bracket 2 is used to fix the agitator motor 1.

[0040] The reactor cover 6 is installed on the top of the reactor body 19 and is sealed and connected to the reactor body 19 by buckles. The reactor cover 6 is generally located between the third-layer bracket 9 and the fourth-layer bracket 2. Figure 5 As shown, four multifunctional valves 5 and a stirring paddle inlet 18 are arranged on the reactor cover 6. The multifunctional valve 5 is used as a feed inlet, a pressure relief port, and a safety valve installation port. The stirring paddle inlet 18 is located on the central axis of the reactor cover 6, and is used to pass through the stirring rod 3 to connect the stirring paddle 8, and the stirring paddle 8 extends into the inner cavity of the reactor. The height of the stirring paddle 8 inside the reactor body 19 can be adjusted by the stirring rod 3. The stirrer motor 1 and the stirring paddle 8 and the stirring rod 3 can be disassembled, and the stirring paddle inlet 18 is sealed by the sealing cover 4.

[0041] A circulating heating sleeve 10 is arranged on the inner wall of the reactor body 19 , and the circulating heating sleeve 10 is provided with a circulating water inlet 20 and a circulating water outlet 7 , which are used to pass circulating hot water into the circulating heating sleeve 10 to heat the reactor body 19 or pass circulating cooling water into the circulating heating sleeve 10 to cool the reactor body 19 .

[0042] like Figure 6 As shown, a convex discharge interface 191 is provided at the bottom of the reactor body 19, and a ventilation-discharge integrated device 21 is installed through the discharge interface 191. The ventilation-discharge integrated device 21 is composed of a porous ventilation mechanism 11, an inert gas introduction mechanism 14 and a discharge mechanism 13.

[0043] like Figure 7 As shown, the inert gas inlet mechanism 14 and the porous ventilation mechanism 11 are usually formed in one piece, and the porous ventilation mechanism 11 is located on the top of the inert gas inlet mechanism 14 .

[0044] The inert gas introduction mechanism 14 includes an inert gas pipeline 141 of a slender tubular structure, a support body 142 is provided on the upper part of the inert gas pipeline 141, and an inert gas inlet interface 143 is connected to the bottom end. The support body 142 is coaxially arranged with the inert gas pipeline 141, and has an increased outer diameter relative to the inert gas pipeline 141; the support body 142 can be a solid structure or a frame structure, which is used to form a support for the discharge sealing ring 131 on the outer periphery of the inert gas pipeline 141. The outer diameter of the support body 14 is smaller than the discharge interface 191, so that an annulus is formed between the discharge interface 191 and the support body 14, and the annulus is used for the liquid in the inner cavity of the reactor body 19 to flow out. Usually, the support body 142 and the inert gas pipeline 141 are integrally formed. The inert gas inlet interface 143 is used to connect an inert gas storage tank, etc., so that the inert gas enters the porous ventilation mechanism 11 through the inert gas pipeline 141. A discharge control valve 144 is installed at the junction of the lower part of the inert gas pipeline 141 and the limiting inner tube 133. By rotating the discharge control valve 144, the inert gas pipeline 141 can be controlled to move upward or downward relative to the limiting inner tube 133 of the discharge mechanism 13.

[0045] The porous ventilation mechanism 11 includes a ventilation body 111 coaxially arranged with the inert gas pipeline 141. The ventilation body 111 is a cylinder with a spherical cap on the top. This shape design is conducive to the uniform dispersion of gas in all directions. The bottom of the ventilation body 111 is fixed to the top surface of the support body 142, and its outer diameter is smaller than the support body 142. The ventilation body 111 is provided with a central gas channel 112, a top air outlet 113, and a side air outlet 114. The central gas channel 112 is arranged along the central axis of the ventilation body 111, and the top of the central gas channel 112 is connected to the top air outlet 113, and the bottom is connected to the inert gas pipeline 141 of the inert gas inlet mechanism 14. The top air outlet 113 is arranged at the top of the ventilation body 111, connecting the central gas channel 112 with the inner cavity of the reactor body 19, and the number thereof is preferably 3-15. The side air outlet 114 is arranged on the side of the ventilation body 111, connecting the central gas channel 112 with the inner cavity of the reactor body 19, and each side air outlet 114 extends obliquely downward from the central gas channel 112 to the outer wall of the ventilation body 111, and its inclination angle relative to the horizontal plane is 30° to 60°. Multiple groups of side air outlets 114 are distributed along the axial direction of the ventilation body 111, and multiple groups of side air outlets 114 in each group are evenly distributed along the circumference of the ventilation body 111. The porous ventilation mechanism 11 can realize the inert gas passing through the top air outlet 113 and the side air outlet 114 into the bottom of the reactor body 19, so as to achieve the purpose of fully stirring the solution from the bottom by the airflow. The airflow directly stirs the reaction liquid to make the grafting reaction proceed evenly on the one hand, and on the other hand, it can timely discharge the air in the inner cavity of the reactor body 19.

[0046] like Figure 8As shown, the discharging mechanism 13 includes a discharging sealing ring 131, a discharging outer tube 132, a limiting inner tube 133, a discharging adapter 134, an outer tube sealing ring 135, and an inner tube sealing ring 136. The discharging sealing ring 131, the discharging outer tube 132, the limiting inner tube 133, the outer tube sealing ring 135, and the inner tube sealing ring 136 are all coaxially arranged with the inert gas pipeline 141.

[0047] The top interface of the discharge outer tube 132 is used to connect with the discharge interface 191 of the reactor body 19, and the inner diameter and outer diameter of the discharge outer tube 132 are usually consistent with the discharge interface 191. The connection between the discharge interface 191 and the top of the discharge outer tube 132 is fixed by a clamp and sealed by an outer tube sealing ring 135. The bottom of the discharge outer tube 131 forms a closed bottom surface outside the limiting inner tube 132. The inner diameter of the discharge outer tube 132 is larger than the outer diameter of the inert gas introduction mechanism 14, so that an annulus is formed between the discharge outer tube 132 and the inert gas introduction mechanism 14, and the annulus is used for the liquid in the inner cavity of the reactor body to flow out.

[0048] The discharge transfer port 134 extends outward from the bottom side of the discharge outer tube 132 and tilts downward. The discharge transfer port 134 is connected to the inner cavity of the discharge outer tube 132 and is used to discharge the liquid in the inner cavity of the reactor body out of the reaction system.

[0049] The middle part of the limiting inner tube 133 is integrally connected with the bottom end of the discharge outer tube 132. The limiting inner tube 133 is axially located between the support body 142 of the inert gas introduction mechanism 14 and the discharge control valve 144 and is connected vertically. The inner diameter of the limiting inner tube 133 is slightly larger than the inert gas pipeline 141, and is used to allow the inert gas pipeline 141 to pass through it, so as to ensure that the inert gas pipeline 141 avoids radial shaking when moving axially. The top surface of the limiting inner tube 133 and the bottom surface of the support body 142 are sealed by the outer tube sealing ring 135, and the inner tube sealing ring 136 can prevent leakage of the discharge.

[0050] The discharge sealing ring 131 is located on the upper surface of the support body 142 , and the outer diameter of the discharge sealing ring 131 is greater than the outer diameters of the ventilation body 111 and the support body 142 .

[0051] When the rotary discharge control valve 144 controls the inert gas pipeline 141 to move upward, the discharge sealing ring 131 can move along with the inert gas pipeline 141 and the support body 142 to the sealing ring groove 192 at the bottom of the reactor body 19. Through the sealing cooperation between the discharge sealing ring 131 and the sealing ring groove 192, the liquid discharge in the inner cavity of the reactor body 19 can be closed.

[0052] When the rotary discharge control valve 144 controls the inert gas pipeline 141 to move downward, the discharge sealing ring 131 moves downward together with the inert gas pipeline 141 and the support body 142, so that the discharge sealing ring 131 moves below the sealing ring groove 192, thereby realizing the opening of the bottom discharge of the reactor body 19. The liquid in the inner cavity of the reactor body can pass through the discharge interface 191 and flow into the discharge adapter interface 134 along the annular space between the discharge outer tube 132 and the inert gas introduction mechanism 14, and be discharged from the reaction system through the discharge adapter buckle 134.

[0053] As a preferred embodiment of the present invention: the bottom section of the limiting inner tube 133 is provided with an internal thread which cooperates with the external thread of the inert gas pipeline 141 to form a sealing pipe thread, and at the same time, the external thread of the inert gas pipeline 141 cooperates with the internal thread provided through the length of the discharge control valve 144 to form a non-sealing pipe thread for controlling the up and down movement of the inert gas pipeline 141, wherein the sealing pipe thread formed by the limiting inner tube 133 and the inert gas pipeline 141 is located above the non-sealing pipe thread formed by the inert gas pipeline 141 and the discharge control valve 144. As follows, the inert gas pipeline 141 can be controlled to move upward or downward by rotating the discharge control valve 144.

[0054] The working process of the reaction system of the present invention is described in detail below in conjunction with two experimental examples:

[0055] Example 1

[0056] Before the experiment begins, push the reactor support vehicle 17 to the argon port connection, adjust the height of the reactor body 19 and fix the reactor body 19 by adjusting the second-layer support 12 and the third-layer support 9, open the reactor cover 6 to add the measured reaction materials, fix the agitator motor 1 on the fourth-layer support 2, install the stirring paddle 8 and the stirring rod 3; fix the reactor cover 6 to the reactor body 19 through a metal buckle; close the multi-function valve 5, open the inert gas inlet mechanism 14, inject inert gas argon into the reactor body 19, and stir the reaction liquid through the porous ventilation mechanism 11; after the reaction liquid is stirred evenly, reduce the inert gas ventilation volume; connect the circulating water inlet 20 and the circulating water outlet 7, pass circulating hot water into the circulating heating pipe sleeve 10, and heat the reactor body 19; turn on the stirring motor 1 to drive the stirring rod 3 and The stirring paddle 8 rotates; after the reaction is completed, the circulating hot water is stopped from being introduced into the circulating heating pipe sleeve 10, and the cooling circulating water is introduced into the water inlet pipe 20 instead, so as to reduce the temperature in the reactor body 19; when the temperature in the reactor body 19 is reduced to room temperature, the agitator motor 1 is stopped, and the inert gas inlet mechanism 14 is closed; the discharge adapter 134 of the discharge mechanism 13 is connected to the waste liquid barrel, and the discharge control valve 144 is rotated to move the discharge sealing ring 131 below the sealing ring slot 192, so as to achieve the purpose of opening the discharge mechanism 13 and discharge the waste liquid; the discharge control valve 144 is closed, the reactor cover 6 is opened, and the reaction product in the reactor body 19 and the stirring paddle 8 fixed on the stirring rod 3 are taken out for the next step of analysis and detection; the reactor body 19 and its internal components are cleaned; the discharge mechanism 13 is opened to discharge the cleaned waste liquid.

[0057] Example 2

[0058] Before the experiment begins, push the reactor support vehicle 17 to the argon port connection, adjust the height of the reactor body 19 and fix the reactor body 19 by adjusting the second-layer support 12 and the third-layer support 9, open the reactor cover 6 and add the measured reaction materials; fix the reactor cover 6 to the reactor body 19 through a metal buckle; close the multifunctional valve 5, open the inert gas inlet mechanism 14, inject inert gas argon into the reactor body 19, and stir the reaction liquid through the porous ventilation device mechanism 11; connect the circulating water inlet 20 and the circulating water outlet 7, pass circulating hot water into the circulating heating pipe sleeve 10, and heat the reactor body 19; observe the uniformity of the reaction liquid, and adjust the inert gas inlet mechanism 14 according to the uniformity of the reaction liquid. The amount of inert gas flow; after the reaction is completed, stop introducing circulating hot water and instead introduce circulating cooling water into the water inlet pipe 20 to reduce the temperature in the reactor body 19; when the temperature in the reactor body 19 drops to room temperature, close the inert gas inlet mechanism 14; connect the discharge adapter 134 of the discharge mechanism 13 to the waste liquid barrel, rotate the discharge control valve 144 to move the discharge port sealing ring 135 below the sealing ring slot 192, so as to achieve the purpose of opening the discharge mechanism 13 and discharge the waste liquid; close the discharge control valve 144134, open the reactor cover 6, and take out the reaction product in the reactor body 19 for the next step of analysis and detection; clean the reactor body 19 and its internal components; open the discharge mechanism 13 to discharge the cleaned waste liquid.

[0059] According to the experimental results, the films synthesized in Example 1 and Example 2 have high thickness uniformity. The thickness difference of the film synthesized in Example 1 is less than 3%, and the thickness difference of the film synthesized in Example 2 is less than 5%.

[0060] It can be seen that the present invention can achieve uniform stirring of different reaction liquids such as solutions, emulsions, and suspensions while ensuring a high irradiation grafting rate, so as to improve the uniformity of the overall reaction, thereby improving the practical value of the reaction system. The reaction system can be used for irradiation grafting reaction and post-treatment, and is provided with an integrated ventilation-discharging device and a mobile device, and is suitable for the amplification of pre-irradiation grafting reactions with a reactor volume greater than 10 liters.

[0061] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms of specific changes without departing from the scope of protection of the invention and the claims, all of which fall within the scope of protection of the present invention.

Claims

1. A reaction system suitable for pre-irradiation grafting, comprising a reactor body and a reactor cover installed on the top of the reactor body; characterized in that: The bottom end of the reactor body is provided with a discharge interface, and a ventilation-discharge integrated device is installed through the discharge interface, and the ventilation-discharge integrated device is composed of a porous ventilation mechanism, an inert gas introduction mechanism, and a discharge mechanism; The inert gas introduction mechanism comprises an inert gas pipeline, the upper part of which is provided with a support body, and the bottom end of which is connected with an inert gas inlet interface; a discharge control valve is installed at the lower part of the inert gas pipeline, and the inert gas pipeline can be controlled to move upward or downward relative to the limiting inner tube of the discharge mechanism by rotating the discharge control valve; The porous ventilation mechanism is located above the inert gas inlet mechanism; the porous ventilation mechanism comprises a ventilation body coaxially arranged with the inert gas pipeline, the ventilation body is a cylinder with a spherical cap on the top; the ventilation body is provided with a central gas channel connected with the inert gas pipeline, the central gas channel is connected with a plurality of top gas outlets and a plurality of side gas outlets, the top gas outlet is arranged at the top of the ventilation body, and the central gas channel is connected with the inner cavity of the reactor body, the side gas outlet is at the side of the ventilation body, and the central gas channel is connected with the inner cavity of the reactor body; The discharge mechanism comprises an outer discharge tube, a limiting inner tube, a discharge sealing ring, an outer tube sealing ring and an inner tube sealing ring which are coaxially arranged with the inert gas pipeline; the top interface of the outer discharge tube is used to dock with the discharge interface at the bottom end of the reactor body, and the outer discharge tube and the discharge interface are sealed by the outer tube sealing ring; the bottom of the outer discharge tube forms a closed bottom surface outside the limiting inner tube; the inner diameter of the outer discharge tube is larger than the outer diameter of the inert gas introduction mechanism, so that an annulus is formed between the outer discharge tube and the inert gas introduction mechanism, and the annulus is used for the outflow of liquid in the cavity of the reactor body; a downwardly inclined discharge adapter is provided on the bottom side of the outer discharge tube, and the discharge adapter is connected with the annulus; the middle part of the limiting inner tube is integrally connected with the bottom end of the outer discharge tube, and the limiting inner tube is axially arranged between the support body and the discharge control valve The inner tube is connected vertically and is used to allow the inert gas pipeline to pass through; the inner tube is sealed with the support body by the inner tube sealing ring; the discharge sealing ring is installed on the upper surface of the support body and supported by the support body, and the outer diameter of the discharge sealing ring is larger than the outer diameter of the support body; when the discharge sealing ring moves with the inert gas pipeline to the sealing ring groove at the bottom of the reactor body, the discharge sealing ring will be sealed and cooperated with the sealing ring groove to achieve the closure of the discharge at the bottom of the reactor body; when the discharge sealing ring moves with the inert gas pipeline to below the sealing ring groove, the discharge at the bottom of the reactor body is opened, and the liquid in the inner cavity of the reactor body can pass through the discharge interface, and flow into the discharge adapter along the annulus between the discharge outer tube and the inert gas introduction mechanism, and be discharged from the reaction system through the discharge adapter.

2. A reaction system suitable for pre-irradiation grafting according to claim 1, characterized in that: The reactor body is installed in the reactor support vehicle, which is composed of four columns and four-layer supports installed on the four columns. The four-layer supports are, from bottom to top, the first-layer support, the second-layer support, the third-layer support, and the fourth-layer support; wheels are provided at the bottom of the first-layer support; the second-layer support and the third-layer support are used to adjust the height of the reactor body and then fix the reactor body; the fourth-layer support is used to fix the agitator motor.

3. A reaction system suitable for pre-irradiation grafting according to claim 2, characterized in that: The second-layer bracket includes a square flat plate and a center hole arranged on the square flat plate, the diameter of the center hole is smaller than the outer diameter of the reactor body, so that the bottom of the reactor body can be seated on the center hole, and the second-layer bracket supports the bottom of the reactor body; the third-layer bracket includes a square frame and a circular clamp connected to the square frame, and the circular clamp is used to fix the upper part of the reactor body to achieve the support of the third-layer bracket to the upper part of the reactor body; the second-layer bracket and the third-layer bracket are both connected to four columns through an adjusting component, and the adjusting component can slide up and down relative to the four columns and be fixed after sliding into place.

4. A reaction system suitable for pre-irradiation grafting according to claim 1, characterized in that: The reactor cover is provided with a stirring paddle inlet, and the stirring paddle inlet is used to pass a stirring rod. The upper end of the stirring rod is connected to a stirrer motor, and the lower end is connected to a stirring paddle. The height of the stirring paddle inside the reactor body can be adjusted by the stirring rod.

5. A reaction system suitable for pre-irradiation grafting according to claim 1, characterized in that: The inner wall of the reactor body is provided with a circulating heating pipe sleeve, and the circulating heating pipe sleeve is provided with a circulating water inlet and a circulating water outlet.

6. A reaction system suitable for pre-irradiation grafting according to claim 1, characterized in that: The support body is coaxially arranged with the inert gas pipeline and has an outer diameter larger than that of the inert gas pipeline.

7. A reaction system suitable for pre-irradiation grafting according to claim 1, characterized in that: The inert gas introduction mechanism and the porous ventilation mechanism are integrally formed.

8. A reaction system suitable for pre-irradiation grafting according to claim 1, characterized in that: The plurality of groups of side air outlet holes are distributed at intervals along the axial direction of the ventilation body, and the plurality of groups of side air outlet holes in each group are evenly distributed along the circumference of the ventilation body.

9. A reaction system suitable for pre-irradiation grafting according to claim 1, characterized in that: Each of the side air outlet holes extends obliquely downward from the central gas channel to the outer wall of the ventilation body, and the inclination angle of the side air outlet hole relative to the horizontal plane is 30° to 60°.

10. The reaction system suitable for pre-irradiation grafting according to claim 1, characterized in that: The bottom of the ventilation body is fixed to the top surface of the support body, and the outer diameter of the ventilation body is smaller than the outer diameter of the support body.

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