Device and method for polymerizing cationic styrene-acrylic sizing enhancer

Abstract

The invention discloses a cationic styrene-acrylic sizing enhancer polymerization device and method, the device comprises a support, a plurality of groups of arranged polymerization reaction parts are installed in the support, the plurality of groups of polymerization reaction parts are externally connected with a conveying pipe for combining and conveying liquid, and a controller for controlling the polymerization reaction of the plurality of groups of polymerization reaction parts is installed in the support. The polymerization reaction part comprises a polymerization reaction tube which is mounted in the bracket, the upper end of the polymerization reaction tube is integrally provided with a flange end I for dropwise adding pre-emulsion or an initiator, and the lower end of the polymerization reaction tube is integrally provided with a flange end II. Compared with the prior art, the reactor has the advantages that the reaction space is divided into a plurality of small tubular reaction units, so that the distance from a material to a heat exchange wall is remarkably shortened, the heat transfer path is shortened, the thermal hysteresis phenomenon is greatly weakened, the response speed of a polymerization reaction tube to jacket cooling is higher, and the temperature is strictly controlled; the reaction volume of the polymerization reaction tube is obviously reduced, the total heat release amount is controllable, and the explosion energy is limited.

Description

Technical Field

[0001] The invention relates to the technical field of papermaking chemicals, in particular to a polymerization device and method for a cationic styrene acrylic sizing enhancer. Background Art

[0002] Cationic styrene acrylic sizing agents are water-soluble, positively charged styrene-acrylate polymers. In the papermaking industry, they are primarily used for sizing and reinforcing paper. Their core function is to utilize their cationic properties to adsorb onto negatively charged fibers, forming a water-resistant barrier through the hydrophobic groups on the polymer chains and enhancing interfiber bonding through polymer bridging.

[0003] The polymerization of cationic styrene acrylic sizing enhancers involves a free radical emulsion polymerization process, typically conducted in a continuous stirred tank reactor or a semi-batch reactor. The most critical step in free radical emulsion polymerization is the dropwise addition process. The pre-emulsion and initiator are added dropwise to the reactor via a dropper, already filled with bottom water and heated to the predetermined initiation temperature. During this step, the addition rate must be steady to avoid drastic temperature rise or excessively high monomer concentrations that can lead to gelation. The reaction is also highly exothermic, requiring precise temperature regulation using jacket cooling water, typically within a strict ±1-2°C range.

[0004] In this step, the polymerization reactor is relatively large. When controlling the temperature, there is a lag between heat generation and heat removal by the heat exchange surface in large equipment. Heat must be transferred from the material inside the reactor to the reactor wall, and then through the metal of the reactor wall to the jacket cooling medium. The distance between the material in the large reactor and the reactor wall is greater, making control prone to overshoot or fluctuation. Secondly, the larger the reactor, the smaller the heat exchange area per unit volume. Therefore, removing the heat generated per unit volume of reaction in a large reactor is more difficult than in a small reactor. However, when using a small polymerization reactor, the reaction volume is limited, and the cationic styrene acrylic sizing enhancer produced is limited, requiring multiple operations. Although the temperature can be precisely adjusted, safety is improved while efficiency is reduced. Summary of the Invention

[0005] The present invention aims to solve the above problems and to provide a device and method for polymerizing a cationic styrene acrylic sizing enhancer.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a cationic styrene acrylic sizing enhancer polymerization device, including a bracket, a plurality of groups of polymerization reaction parts are installed in the bracket, the plurality of polymerization reaction parts are externally connected to a transmission pipe for merging and transmitting liquids, and a controller for controlling the polymerization reaction of the plurality of polymerization reaction parts is installed in the bracket. The polymerization reaction parts include: The polymerization reaction tube is installed in the bracket, and its upper end is integrally provided with a flange end 1 for dripping pre-emulsion or initiator, and its lower end is integrally provided with a flange end 2. A control unit for stirring the polymerization reaction tube is installed on the flange end 2. Flange ends 3 for transmitting fluid outward are fixed to both ends of the polymerization reaction tube; Feed pipes, at least two groups, are integrally formed on the upper and lower sides of the polymerization reaction tube and are close to both ends of the polymerization reaction tube for feeding fluids; The control layer is arranged in the polymerization reaction tube to push and transmit the internal fluid, and the outer end of the control layer is provided with a driver.

[0007] A further preferred solution of the present invention is: there are at least two one-way valves 1 in flange end 1, a one-way valve 2 in the feed pipe, and a one-way valve 3 fixed to the outer end of flange end 3. One-way valve 1 and one-way valve 2 drive the fluid to move in one direction toward the inside of the polymerization reaction tube, and one-way valve 3 drives the fluid to move in one direction toward the outside of the polymerization reaction tube.

[0008] A further preferred solution of the present invention is: an upper inner layer is fixed in one end of the flange, the inner end of the upper inner layer is flush with the inner wall of the polymerization reaction tube, and two one-way valves are fixed in the upper inner layer and communicated with the polymerization reaction tube.

[0009] A further preferred solution of the present invention is that the driver is a cylinder, and the output end of the cylinder extends from a flange end three on one side into the polymerization reaction tube and is fixed to the control layer; A sheet metal layer is fixed inside the bracket, a driver is fixed outside the sheet metal layer, and the driver is electrically connected to the controller.

[0010] A further preferred solution of the present invention is that the control layer is a metal disc, the outer arc surface of which is in contact with the inner wall of the polymerization reaction tube, and the outer arc surface of the control layer also has a sealing ring to form a seal with the inner wall of the polymerization reaction tube.

[0011] A further preferred solution of the present invention is that: both end surfaces of the control layer are provided with cutouts, the cutouts on both sides are arranged one above and one below, and extend through the outer arc surface of the control layer respectively. When the control layer moves to the end of the polymerization reaction tube, the control layer is three-fitted with the flange end on one side, and the cutout on one side is located at the lower end of the feed tube.

[0012] A further preferred embodiment of the present invention is as follows: the control portion includes a fixed sleeve fixed to the outer end of the second flange end, a telescopic controller is installed on the outer end of the fixed sleeve, a lower inner layer is rotatably installed inside the second flange end, a rotating shaft passes through the axis of the lower inner layer, and fan blades are integrally formed on the outer side of the rotating shaft, and the fan blades also pass through the lower inner layer, and one end of the lower inner layer, the rotating shaft, and the fan blades facing into the polymerization reaction tube are flush with the inner wall of the polymerization reaction tube; The outer end of the fixed sleeve is detachably fixed with a telescopic controller, the output end of the telescopic controller is fixed to the rotating shaft, and the fixed sleeve is detachably fixed with a rotation controller, the output end of the rotation controller has a gear, the outer wall of the rotating shaft has teeth that mesh with the gear, and the teeth extend along the axis of the rotating shaft to the outer end of the telescopic controller; The rotation controller and the telescopic controller are both electrically connected to the controller.

[0013] A further preferred solution of the present invention is that the rotation controller is a servo motor and the telescopic controller is a small cylinder.

[0014] A further preferred solution of the present invention is that a sealing ring is provided between the lower inner layer and the second flange end, so that the rotating shaft and the fan blades are sealed from the lower inner layer.

[0015] A method for polymerizing a cationic styrene acrylic sizing enhancer comprises the following steps: Step 1: The bottom water is connected to the feed pipes on both sides through pipes, and the prepared pre-emulsion and initiator are connected to flange end 1; Step 2: The control layer is driven by a driver to move in the polymerization reaction tube, and the bottom water is extracted along the feed pipe on one side. When the control layer passes through the lower end of the flange end, the pre-emulsion and initiator are simultaneously added dropwise into the polymerization reaction tube to react and obtain a cationic styrene acrylic emulsion base material; Step 3: While the pre-emulsion and initiator are being added dropwise to the polymerization reaction tube, the jacket cooling water on the outside of the polymerization reaction tube accurately adjusts the temperature of the polymerization reaction tube, and the fluctuation range is required to be strictly controlled within ±1-2°C; Step 4: Drive the control layer in reverse to move the completed cationic styrene acrylic emulsion base material outward along the flange end of one side along the transmission pipe. At the same time, the new bottom water in the opposite direction pushed by the control layer moves from the feed pipe on the other side into the polymerization reaction tube to continuously react.

[0016] Compared with the prior art, the advantages of the present invention are: 1. By decomposing the reaction space into multiple small tubular reaction units, the distance from the material to the heat exchange wall is significantly shortened, the heat transfer path is shortened, and the thermal hysteresis phenomenon is greatly reduced. Secondly, the polymerization reaction tube responds faster to jacket cooling, achieving strict temperature control; the reaction volume of the polymerization reaction tube is significantly reduced, the total amount of heat release is controllable, and the explosion energy is limited.

[0017] 2. The reciprocating motion of the control layer synchronously completes bottom water suction, material mixing, reaction, and product discharge, forming a continuous reaction flow. This solves the problem of precise temperature control while improving efficiency. The control layer is fully sealed and fitted with the inner wall of the polymerization reaction tube. The upper and lower inner layers fill the end space to ensure that the fluid is completely pushed out, the material residue rate is extremely low, and waste and cross contamination are reduced.

[0018] 3. The fan blades in the control unit are pushed into the reaction zone by the telescopic controller only during the mixing stage, and the rotating controller drives high-speed stirring; during the pushing stage, they retract to avoid the piston, speeding up the reaction efficiency and avoiding affecting the continuous reaction flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments and therefore should not be regarded as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings only conceptually represent the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of a half-section structure of the stent of the present invention; Figure 3 This is a schematic diagram of the structure of a polymerization reaction unit of the present invention; Figure 4 This is a schematic diagram of the half-section structure of the polymerization reaction tube of the present invention; Figure 5 This is a schematic diagram of the exploded structure of the end portion of the polymerization reaction tube of the present invention; Figure 6 Schematic diagram of the control layer structure of the present invention; Figure 7 This is a schematic diagram of the control unit structure of the present invention; Figure 8 This is a schematic diagram of the motion structure of the control layer of the present invention; Figure 9 This is another structural diagram of the control layer movement of the present invention.

[0021] In the figure: 1. bracket; 2. polymerization reaction part; 21. polymerization reaction tube; 22. flange end one; 221. one-way valve one; 222. upper inner layer; 23. flange end two; 24. control part; 241. fixing sleeve; 242. lower inner layer; 243. rotating shaft; 244. fan blade; 245. rotation controller; 246. gear; 247. telescopic controller; 25. feeding pipe; 251. one-way valve two; 26. driver; 261. sheet metal layer; 27. control layer; 271. cut-off; 28. flange end three; 281. one-way valve three; 3. controller; 4. transmission pipe. DETAILED DESCRIPTION

[0022] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0023] It should be noted that like reference numerals denote like items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings. Example

[0024] This embodiment mainly describes a polymerization device for a cationic styrene acrylic sizing enhancer, specifically as follows: the polymerization reactor is relatively large in size. When controlling the temperature, there is a lag in the process from the generation of heat in large equipment to the removal of heat by the heat exchange surface. The heat needs to be transferred from the material in the reactor to the reactor wall, and then transferred to the jacket cooling medium through the metal of the reactor wall. The distance between the material in the large reactor and the reactor wall is farther, and the control is prone to overshoot or fluctuation. When a small polymerization reactor is used, although the temperature can be fine-tuned, the reaction amount is limited. While the safety is improved, the efficiency will be reduced. Based on this, a polymerization device for a cationic styrene acrylic sizing enhancer is proposed, such as Figures 1-4 As shown, it includes a bracket 1, in which multiple groups of polymerization reaction parts 2 are installed. The multiple groups of polymerization reaction parts 2 are externally connected to a transmission pipe 4 for merging and transmitting liquids. A controller 3 for controlling the polymerization reaction of the multiple groups of polymerization reaction parts 2 is installed in the bracket 1. The polymerization reaction parts 2 include: The polymerization reaction tube 21 is installed in the bracket 1. Its upper end is integrally provided with a flange end 1 22 for dripping pre-emulsion or initiator. Its lower end is integrally provided with a flange end 23. A control unit 24 for stirring the polymerization reaction tube 21 is mounted on the flange end 23. Flange ends 3 28 for transmitting fluid outward are fixed to both ends of the polymerization reaction tube 21. Feed pipes 25, at least two groups, are integrally formed on the upper and lower sides of the polymerization reaction tube 21 and are close to both ends of the polymerization reaction tube 21 for feeding fluid; The control layer 27 is disposed in the polymerization reaction tube 21 to push and transmit the internal fluid. The outer end of the control layer 27 is provided with a driver 26.

[0025] Specifically, the transmission pipe 4 is connected to multiple groups of polymerization reaction parts 2, and its function is to transmit the fluid in the multiple groups of polymerization reaction parts 2. It should be noted that the operating states of the multiple groups of polymerization reaction parts 2 are not uniform, ensuring that there can be uninterrupted fluid movement in the transmission pipe 4 to avoid the fluid being stationary in the transmission pipe 4 and affecting subsequent processing. It should be noted that after the fluid moves along the transmission pipe 4, it enters the next step of fluid processing, post-processing and cooling steps.

[0026] The polymerization reaction tube 21 is essentially a small reactor in the shape of a single tube. The upper end in the middle position has a flange end 22 for adding pre-emulsion or initiator, and both ends are fixed with flange ends 28 for transmitting fluid outward. The polymerization reaction tube 21 has feed pipes 25 on the upper and lower sides, and is close to the two ends of the polymerization reaction tube 21 respectively. The polymerization reaction tube 21 has a piston movement control layer 27 inside. During the reciprocating motion, the bottom water can be extracted from the feed pipe 25 and pushed out from the flange end 28. The process in which the bottom water is inside the polymerization reaction tube 21 is actually the process of the reactor reaction.

[0027] like Figure 3-Figure 4 As shown, there are at least two one-way valves 1 221 in the flange end 1 22, a one-way valve 2 251 in the feed pipe 25, and a one-way valve 3 281 fixed to the outer end of the flange end 3 28. The one-way valve 1 221 and the one-way valve 2 251 drive the fluid to move in one direction toward the polymerization reaction tube 21, and the one-way valve 3 281 drives the fluid to move in one direction toward the outside of the polymerization reaction tube 21.

[0028] Specifically, since it is necessary to control the reciprocating motion of the control layer 27, the bottom water inside the polymerization reaction tube 21 is extracted and mixed with the pre-emulsion and the initiator, and the fluid after the reaction needs to be moved out to perform the next step of the operation, the position where the bottom water moves in and out and the position where the pre-emulsion and the initiator are added need to be set in one direction. Based on this setting, there are two one-way valves 221 in the flange end 1 22, which are used to add the pre-emulsion and the initiator respectively, and a one-way valve 251 is provided in the feed pipe 25. A one-way valve 3 281 is fixed to the outer end of the flange end 3 28 for driving the fluid to move in one direction, which can enter the polymerization reaction tube 21 and move out of the polymerization reaction tube 21, and the next step is performed after the polymerization reaction is completed.

[0029] like Figure 4 As shown, an upper inner layer 222 is fixed in the flange end 22 , and the inner end of the upper inner layer 222 is flush with the inner wall of the polymerization reaction tube 21 . Two one-way valves 221 are fixed in the upper inner layer 222 and communicate with the polymerization reaction tube 21 .

[0030] Specifically, the upper inner layer 222 mainly prevents the flange end 22 from being hollow, fills the flange end 22, and keeps the polymerization reaction tube 21 in a tubular shape. Correspondingly, it can also enable the control layer 27 to push the fluid inside the polymerization reaction tube 21 as much as possible to reduce the residue as much as possible.

[0031] like Figure 3 and Figure 5As shown, the actuator 26 is a cylinder, the output end of which extends from a flange end 28 on one side into the polymerization reaction tube 21 and is fixed to a control layer 27. Specifically, the actuator 26 is controlled by the controller 3 and drives the control layer 27 to move. During the reciprocating motion of the control layer 27, the control layer 27 can respectively engage with the flange ends 28 at both ends, thereby pushing the fluid out of the polymerization reaction tube 21. It should be noted that during the process of extending the output end of the cylinder from the flange end 28 on one side into the polymerization reaction tube 21, a seal is also provided between the cylinder output end and the flange end 28. It should also be noted that the seal here is a conventional seal, which is in line with existing technology.

[0032] A sheet metal layer 261 is fixed inside the bracket 1, and the driver 26 is fixed outside the sheet metal layer 261. The driver 26 is electrically connected to the controller 3. The bracket 1 and the sheet metal layer 261 are both existing equipment. The bracket 1 is used to support the polymerization reaction part 2, and the sheet metal layer 261 is used to support the driver 26.

[0033] like Figure 5-Figure 6 As shown, the control layer 27 is a metal disc, and its outer arc surface is in contact with the inner wall of the polymerization reaction tube 21 . The outer arc surface of the control layer 27 also has a sealing ring to form a seal with the inner wall of the polymerization reaction tube 21 .

[0034] It should be noted that the control layer 27 forms a seal with the inner wall of the polymerization reaction tube 21, so when the control layer 27 reciprocates, the fluid can be pushed and moved. It should be noted that the control layer 27 is sealed by a sealing ring, which is an existing technology. It should also be noted that after the sealing ring is aged, the flange end three 28 on one side can be opened and the control layer 27 can be taken out for replacement.

[0035] like Figure 6 As shown, both end faces of the control layer 27 are provided with cutouts 271, and the cutouts 271 on both sides are arranged one above and one below, and extend through the outer arc surface of the control layer 27 respectively. When the control layer 27 moves to the end of the polymerization reaction tube 21, the control layer 27 is fitted with the flange end three 28 on one side, and the cutout 271 on one side is located at the lower end of the feed pipe 25.

[0036] When the control layer 27 moves to fit with the flange end three 28, the cutout 271 of the control layer 27 is located at the lower end of the feed pipe 25. On this basis, the control layer 27 moves, and the position between the control layer 27 and the flange end three 28 is in a negative pressure state. The only connected position is that the cutout 271 is connected to the feed pipe 25. Under the negative pressure state, the bottom water of the feed pipe 25 can be extracted through the cutout 271, and no gas will be generated between the control layer 27 and the flange end three 28.

[0037] It should be noted that during the movement of control layer 27, the fluid in the direction of movement is under positive pressure, while the fluid in the direction of movement is under negative pressure. The position in the direction of movement is the bottom water. Even under negative pressure, the pre-emulsion and initiator can be easily added dropwise. It should be noted that the pre-emulsion and initiator addition equipment is existing equipment to prevent excessive pre-emulsion and initiator from moving inward through one-way valve 1 221.

[0038] like Figure 7 As shown, the control unit 24 includes a fixed sleeve 241 fixed to the outer end of the second flange end 23, and a telescopic controller 247 is installed on the outer end of the fixed sleeve 241. A lower inner layer 242 is rotatably installed inside the second flange end 23. A rotating shaft 243 passes through the axis of the lower inner layer 242. A fan blade 244 is integrally formed on the outer side of the rotating shaft 243. The fan blade 244 also passes through the lower inner layer 242. The end of the lower inner layer 242, the rotating shaft 243 and the fan blade 244 facing the polymerization reaction tube 21 is flush with the inner wall of the polymerization reaction tube 21. A telescopic controller 247 is detachably fixed to the outer end of the fixed sleeve 241. The output end of the telescopic controller 247 is fixed to the rotating shaft 243. A rotation controller 245 is detachably fixed inside the fixed sleeve 241. The output end of the rotation controller 245 has a gear 246. The outer wall of the rotating shaft 243 has teeth that mesh with the gear 246. The teeth extend along the axis of the rotating shaft 243 to the outer end of the telescopic controller 247. The rotation controller 245 and the telescopic controller 247 are both electrically connected to the controller 3 .

[0039] Specifically, the lower inner layer 242 is used to fill the interior of the flange end 23, and the rotating shaft 243 and fan blades 244 inside it fit together with the lower inner layer 242, and the two are sealed, so that the lower inner layer 242 and the rotating shaft 243 and fan blades 244 inside it are in a smooth transition state with the inner wall of the polymerization reaction tube 21, so that the control layer 27 can push and move smoothly along the polymerization reaction tube 21. It should be noted that the rotating shaft 243 and the fan blades 244 fit in with the lower inner layer 242. The rotating shaft 243 and the fan blades 244 can fit in with the lower inner layer 242 to achieve a sealing effect, or the lower inner layer 242 can have a rubber layer that fits in with the rotating shaft 243 and the fan blades 244 to achieve a seal. It should be noted that when there is a rubber layer, its material is fluororubber or polytetrafluoroethylene. The rubber layers used in this application are all corrosion-resistant materials. It should also be noted that the rubber located in the lower inner layer 242 is squeezed with the rotating shaft 243 and the fan blades 244 and does not come into contact with the fluid over a large area. It should also be noted that the fixing sleeve 241 is used to seal the outer end of the flange end 23 to further prevent fluid leakage.

[0040] The rotation controller 245 is a servo motor, and the telescopic controller 247 is a small cylinder. The servo motor and the small cylinder are controlled by the controller 3 to avoid interference, and the movement state is also coordinated with the driver 26.

[0041] like Figure 7 As shown, there is a sealing ring between the lower inner layer 242 and the second flange end 23, and the rotating shaft 243 and the fan blades 244 are in a sealed state with the lower inner layer 242.

[0042] Specifically, when the rotating shaft 243 and the fan blades 244 rotate, in order to avoid the formation of a groove between the fan blades 244 and the lower inner layer 242 when moving into the polymerization reaction tube 21, the bottom water in the groove is not allowed to move out from the inside to the outside, and the reaction degree is easily affected. It should also be noted that if there is a rubber layer in the groove, it will directly contact the bottom water, which is easy to cause corrosion and affect the service life. Example

[0043] A method for polymerizing a cationic styrene acrylic sizing enhancer comprises the following steps: Step 1: The bottom water has been prepared through the existing reactor. Secondly, the bottom water is connected to the feed pipes 25 on both sides through pipes. The pre-emulsion and initiator have also been prepared and are located in the pre-emulsification tank and the initiator solution tank respectively. The prepared pre-emulsion and initiator are connected to the flange end 22 and added dropwise using the existing technology. Step 2: The control layer 27 is driven by the driver 26 to move in the polymerization reaction tube 21, and the bottom water is extracted along the feed pipe 25 on one side. At the same time as the control layer 27 passes through the lower end of the flange end 22, the pre-emulsion and the initiator are simultaneously added dropwise into the polymerization reaction tube 21 to react to obtain a cationic styrene-acrylic emulsion base material. The dropping technology is the existing technology, and only the polymerization reaction kettle in the existing technology is replaced with the polymerization reaction tube 21 in the present application; Step 3: While the pre-emulsion and initiator are being added dropwise to the polymerization reaction tube 21, the jacket cooling water on the outside of the polymerization reaction tube 21 accurately adjusts the temperature of the polymerization reaction tube 21, and the fluctuation range is required to be strictly controlled within ±1-2°C; Step 4: Drive the control layer 27 in reverse to move the completed cationic styrene acrylic emulsion base material outward along the flange end three 28 on one side along the transmission pipe 4. At the same time, the new bottom water pushed in the opposite direction by the control layer 27 moves from the other side feed pipe 25 toward the polymerization reaction tube 21 to continuously react.

[0044] It should be noted that, for further safety considerations, solenoid valves can be added to one-way valve 221, one-way valve 251 and one-way valve 3 281 to control the opening and closing of one-way valve 221, one-way valve 251 and one-way valve 3 281. The solenoid valves can also be electrically connected to the controller 3 to control the opening and closing of the solenoid valves, thereby further improving safety.

[0045] Working principle: Figure 3As shown, the one-way valve 1 221 has two sets, connected to the pre-emulsion and initiator respectively, and the two sets of one-way valve 251 are connected to the bottom water respectively. It should be noted that the pre-emulsion and initiator have been prepared and stored in their respective pre-emulsification tanks and initiator solution tanks. The addition of pre-emulsion and initiator in traditional reactors is a prior art, and is also performed in the polymerization reaction tube 21 of the present application. It should also be noted that the commonly used equipment for dripping the pre-emulsion and initiator is a metering pump or a regulating valve, etc., for dripping.

[0046] During the movement of the present application, the control layer 27 is controlled by the driver 26 to perform piston movement along the inner wall of the polymerization reaction tube 21, and the reverse direction of its movement realizes that the one-way valve 2 251 on this side squeezes the bottom water inward. When the control layer 27 passes through the one-way valve 1 221, the lower ends of the two groups of one-way valves 1 221 are connected with the bottom water, and the effect of dripping is realized, so that the bottom water reacts with the pre-emulsion and the initiator. After the reaction is completed, subsequent processing steps are required. Therefore, the control layer 27 moves in the opposite direction to push the cationic styrene-acrylic emulsion base material that has completed the reaction in the opposite direction, and moves from the one-way valve 3 281 on one side to the transmission tube 4. The reverse direction of the movement of the control layer 27 will suck in the bottom water and react with the pre-emulsion and the initiator. Figure 8 and Figure 9 As shown, maintaining a small amount of reaction can make the temperature control more precise, and continuous batch reaction solves the problem of difficult temperature control and the problem of low efficiency.

[0047] Secondly, when the control layer 27 passes through the downward extension surface of the flange end 22, that is, after the pre-emulsion and initiator are added, the telescopic controller 247 will push the rotating shaft 243 and the fan blades 244 to extend upward, and drive the rotation of the rotating shaft 243 and the fan blades 244 through the rotation controller 245 to stir the fluid inside the polymerization reaction tube 21 to make the reaction more sufficient. When the control layer 27 moves in the opposite direction, the telescopic controller 247 will reset the rotating shaft 243 and the fan blades 244 to avoid blocking the operation of the control layer 27.

[0048] It should be noted that the driver 26, the telescopic controller 247 and the rotation controller 245 are all electrically connected to the controller 3. The controller 3 controls the operation of the driver 26, the telescopic controller 247 and the rotation controller 245 to avoid interference. It should be noted that the addition of the pre-emulsion and the initiator can be controlled separately or by the controller 3.

[0049] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0050] The above is a detailed introduction to the cationic styrene acrylic sizing enhancer polymerization device and method provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in several ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. Cationic styrene acrylic sizing enhancer polymerization device, characterized in that, The invention comprises a bracket, wherein a plurality of polymerization reaction parts are installed in the bracket, the plurality of polymerization reaction parts are externally connected to a transmission pipe for merging and transmitting liquids, and a controller for controlling the polymerization reaction of the plurality of polymerization reaction parts is installed in the bracket. The polymerization reaction parts include: The polymerization reaction tube is installed in the bracket, and its upper end is integrally provided with a flange end 1 for dripping pre-emulsion or initiator, and its lower end is integrally provided with a flange end 2. A control unit for stirring the polymerization reaction tube is installed on the flange end 2. Flange ends 3 for transmitting fluid outward are fixed to both ends of the polymerization reaction tube; Feed pipes, at least two groups, are integrally formed on the upper and lower sides of the polymerization reaction tube and are close to both ends of the polymerization reaction tube for feeding fluids; The control layer is arranged in the polymerization reaction tube to push and transmit the internal fluid, and the outer end of the control layer is provided with a driver.

2. The cationic styrene acrylic sizing enhancer polymerization device according to claim 1, characterized in that: There are at least two one-way valves 1 in flange end 1, one-way valve 2 in the feed pipe, and one-way valve 3 fixed at the outer end of flange end 3. One-way valve 1 and one-way valve 2 drive the fluid to move in one direction toward the polymerization reaction tube, and one-way valve 3 drives the fluid to move in one direction toward the outside of the polymerization reaction tube.

3. The cationic styrene acrylic sizing enhancer polymerization device according to claim 2, characterized in that: An upper inner layer is fixed in the flange end, and an inner end of the upper inner layer is flush with the inner wall of the polymerization reaction tube. Two one-way valves are fixed in the upper inner layer and communicated with the polymerization reaction tube.

4. The cationic styrene acrylic sizing enhancer polymerization device according to claim 1, characterized in that: The driver is a cylinder, and the output end of the cylinder extends from the flange end three on one side into the polymerization reaction tube and is fixed to the control layer; A sheet metal layer is fixed inside the bracket, a driver is fixed outside the sheet metal layer, and the driver is electrically connected to the controller.

5. The cationic styrene acrylic sizing enhancer polymerization device according to claim 1, characterized in that: The control layer is a disc made of metal material, and its outer arc surface is in contact with the inner wall of the polymerization reaction tube. The outer arc surface of the control layer also has a sealing ring to form a seal with the inner wall of the polymerization reaction tube.

6. The cationic styrene acrylic sizing enhancer polymerization device according to claim 1, characterized in that: There are cutouts on both end faces of the control layer. The cutouts on both sides are arranged one above and one below, and extend through the outer arc surface of the control layer respectively. When the control layer moves to the end of the polymerization reaction tube, the control layer is three-fitted with the flange end on one side, and the cutout on one side is located at the lower end of the feed tube.

7. The cationic styrene acrylic sizing enhancer polymerization device according to claim 1, characterized in that: The control unit includes a fixed sleeve fixed to the outer end of the second flange end, a telescopic controller is installed on the outer end of the fixed sleeve, a lower inner layer is rotatably installed inside the second flange end, a rotating shaft passes through the axis of the lower inner layer, and a fan blade is integrally provided on the outer side of the rotating shaft, and the fan blade also passes through the lower inner layer, and one end of the lower inner layer, the rotating shaft and the fan blade facing into the polymerization reaction tube is flush with the inner wall of the polymerization reaction tube; The outer end of the fixed sleeve is detachably fixed with a telescopic controller, the output end of the telescopic controller is fixed to the rotating shaft, and the fixed sleeve is detachably fixed with a rotation controller, the output end of the rotation controller has a gear, the outer wall of the rotating shaft has teeth that mesh with the gear, and the teeth extend along the axis of the rotating shaft to the outer end of the telescopic controller; The rotation controller and the telescopic controller are both electrically connected to the controller.

8. The cationic styrene acrylic sizing enhancer polymerization device according to claim 7, characterized in that: The rotation controller is a servo motor, and the telescopic controller is a small cylinder.

9. The cationic styrene acrylic sizing enhancer polymerization device according to claim 7, characterized in that: A sealing ring is provided between the lower inner layer and the second flange end, and the rotating shaft and the fan blades are in a sealed state with the lower inner layer.

10. A method for polymerizing a cationic styrene acrylic sizing enhancer, characterized in that: The cationic styrene acrylic sizing enhancer polymerization device according to any one of claims 1 to 9 comprises the following steps: Step 1: The bottom water is connected to the feed pipes on both sides through pipes, and the prepared pre-emulsion and initiator are connected to flange end 1; Step 2: The control layer is driven by a driver to move in the polymerization reaction tube, and the bottom water is extracted along the feed pipe on one side. When the control layer passes through the lower end of the flange end, the pre-emulsion and initiator are simultaneously added dropwise into the polymerization reaction tube to react and obtain a cationic styrene acrylic emulsion base material; Step 3: While the pre-emulsion and initiator are being added dropwise to the polymerization reaction tube, the jacket cooling water on the outside of the polymerization reaction tube accurately adjusts the temperature of the polymerization reaction tube, and the fluctuation range is required to be strictly controlled within ±1-2°C; Step 4: Drive the control layer in reverse to move the completed cationic styrene acrylic emulsion base material outward along the flange end of one side along the transmission pipe. At the same time, the new bottom water in the opposite direction pushed by the control layer moves from the feed pipe on the other side into the polymerization reaction tube to continuously react.

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