A method for producing a highly absorbent resin that absorbs 1000 times more water

Abstract

The present invention relates to the field of resin production, and discloses a method for producing a super absorbent resin that absorbs 1000 times of water, including: step 1: taking 16.39% of acrylic acid, adding 1.64% of sodium hydroxide solution to a reaction vessel, and slowly stirring during the neutralization process; step 2: dissolving 0.016% of potassium persulfate in deionized water in a small container, storing it separately, and taking 0.008% of sodium sulfite dissolved in deionized water as an auxiliary initiator for standby use; step 3: dissolving 0.008% to 0.016% of N, N'-methylenebisacrylamide in a small amount of deionized water, stirring evenly, and standby use; step 4: adding about 0.16% of hydrogen peroxide to deionized water to improve polymerization efficiency; the super absorbent resin produced by the above formula and process has a water absorption rate of more than 1000 times, and performs excellently in terms of water absorption rate, compressive strength and service life. Through the precise proportioning of acrylic acid, crosslinking agent, initiator and modifier, the resin can adapt to a variety of usage scenarios.

Description

Technical Field

[0001] The present invention relates to the technical field of xx, and in particular to a method for producing a highly absorbent resin capable of absorbing 1000 times more water. Background Art

[0002] Superabsorbent resin (SAR) is a polymer material that has the ability to absorb and retain water. It is widely used in agricultural water-retaining agents, sanitary products, and industrial adsorption materials. In order to meet the needs of different application scenarios, its performance needs to be reflected not only in high water absorption rate, but also in rapid water absorption rate, particle strength, and durability for long-term use. In the production process, in order to further enhance the water absorption rate and durability of resin particles, a new technical method combining surface modification and low-temperature drying has been proposed in recent years. This method further optimizes the performance of the particle surface by spraying a cross-linking agent solution (such as divinylbenzene) or a hydrophobic modifier on the surface of the resin particles and drying them in a suitable low-temperature environment.

[0003] In the prior art, the crushed resin particles are evenly distributed in a container, a crosslinking agent solution (such as divinylbenzene) or a hydrophobic modifier is sprayed using a spray device, and then dried at a low temperature of 50°C to 60°C. This process not only removes moisture, but also forms a uniform coating by curing the modifier, which significantly increases the water absorption rate of the particles, while enhancing their moisture resistance and mechanical strength. Low-temperature drying avoids the problem of particle breakage or performance degradation that may be caused by high temperature, and at the same time makes the surface modification effect of the resin particles more uniform, meeting the needs of both high water absorption rate and durability, and has a wide range of application value.

[0004] During the production process of super absorbent resin, a certain amount of liquid will remain on the surface of the particles due to the spraying of the crosslinker solution. After spraying the crosslinker solution, the liquid remaining on the surface of the particles may increase the amount of water evaporation during the drying process and prolong the drying time. This will not only reduce production efficiency, but may also cause uneven heating of the particles during the drying process, resulting in local overheating or cooling, thereby affecting the morphology and quality of the particles. A long drying process may cause hardening or cracking of the particle surface, which in turn affects the water absorption and mechanical strength of the resin. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a method for producing a super absorbent resin that absorbs 1000 times more water, aiming to alleviate the above problems at least to a certain extent.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A method for producing a super absorbent resin capable of absorbing 1000 times more water, comprising:

[0008] Step 1: Add 16.39% acrylic acid into a reaction vessel and add 1.64% sodium hydroxide solution. Stir slowly during the neutralization process.

[0009] Step 2: Dissolve 0.016% potassium persulfate in deionized water in a small container and store it separately. Dissolve 0.008% sodium sulfite in deionized water as an auxiliary initiator and keep it aside.

[0010] Step 3: Dissolve 0.008% to 0.016% of N,N'-methylenebisacrylamide in a small amount of deionized water, stir evenly, and set aside;

[0011] Step 4: Add about 0.16% hydrogen peroxide to deionized water to improve polymerization efficiency;

[0012] Step 5: Pour 81.97% deionized water into the reactor, heat to 50°C, slowly add the prepared acrylic acid solution under stable stirring, add the crosslinker solution and auxiliary additives in sequence, and stir for 5 minutes until the solution is uniform;

[0013] Step 6: Slowly add the initiator solution dropwise, control the dropwise acceleration rate, control the reaction temperature at 60°C, and the reaction time is about 30 minutes, until a gel polymer is formed;

[0014] Step 7: The gel-like super absorbent resin product is taken out from the reactor, washed with deionized water for multiple times to remove unreacted monomers and impurities, and dried with hot air at 60° C. until the water content is reduced to <5%. The dried resin block is processed by mechanical crushing equipment to a target particle size;

[0015] Step 8: Distribute the crushed resin particles evenly in a container, spray the crosslinking agent solution using a spray device, and dry them at 50°C using a drying device to enhance the water absorption rate and durability of the particles;

[0016] The drying equipment described in step eight includes:

[0017] Drying box;

[0018] A material box is arranged in the drying box body, and discharge ports communicating with the drying box body are opened on both sides of the material box;

[0019] A filter plate disposed on the material box, wherein a filter screen a is disposed on the filter plate;

[0020] A drying chamber is arranged in the drying box, and a material discharge port is provided at the bottom of the drying chamber;

[0021] A plurality of drying tubes are arranged in the drying chamber, and a plurality of drying ports are opened on the drying tubes;

[0022] A hot air conveying component disposed between the drying box and the drying chamber, used for outputting hot air into the drying tube;

[0023] A vibrating screen component is provided in the drying box body, and is used to vibrate the material box and the drying chamber up and down. The vibrating screen component can intermittently move the filter plate when vibrating the material box up and down, and the filter plate moves toward the discharge port, shortening the distance between the filter plate and the discharge port;

[0024] Wherein, the vibrating screen component can also rotate the plurality of drying tubes when vibrating the drying chamber up and down.

[0025] Preferably, the vibrating screen component includes a rotating shaft rotatably connected to the drying box body, the rotating shaft is connected to a turntable a, the turntable a is rotatably connected to a plurality of rollers a, the bottom of the material box is connected to an annular boss a in contact with the rollers a, and a spring a is provided between the material box and the drying box body.

[0026] Preferably, the vibrating screen component also includes a connecting shaft rotatably connected to the material box, the connecting shaft is slidably connected to the top of the rotating shaft, the connecting shaft is connected to a gear a, the gear a is an incomplete gear, the material box is rotatably connected to a lead screw, the filter plate is threadedly connected to the lead screw, and the lead screw is connected to a gear b.

[0027] Preferably, the vibrating screen component also includes a spring b connected between the drying chamber and the drying box, the inner bottom surface of the drying chamber is connected to an annular boss b, the rotating shaft is connected to a turntable b, and the turntable b is rotatably connected to a roller b in contact with the annular boss b.

[0028] Preferably, the hot air conveying component includes a hot air blower connected to the drying box body, the air outlet of the hot air blower is connected to a conveying pipe extending into the drying box body, one end of the conveying pipe is connected to a sleeve, the sleeve is rotatably sleeved on the outside of the rotating shaft, a connecting cavity is provided in the rotating shaft, a connecting port connected to the sleeve is provided on the connecting cavity, the drying pipe is connected to the rotating shaft and communicated with the connecting cavity, and a filter b is provided in the drying port.

[0029] Preferably, a protective sleeve is connected to the rotating shaft, and the protective sleeve is sleeved on the outside of the rotating disk b and the annular boss b, and the drying pipe passes through the protective sleeve and extends into the drying chamber.

[0030] Preferably, the drying box is connected to a cylinder, a spring rod is connected to the telescopic shaft of the cylinder, one end of the spring rod is connected to a baffle, and the baffle covers the feed opening.

[0031] Preferably, a guide frame communicating with the discharge port is connected to one side of the material box, and an exhaust port is provided on one side of the material box.

[0032] Preferably, one side of the material box is connected to a drain pipe a, one side of the drying box body is connected to a drain pipe b, and the drain pipe a is slidably connected to the drain pipe b.

[0033] Preferably, the bottom of the drying box is connected to a base, the base is connected to a motor, and the driving shaft of the motor is connected to the rotating shaft.

[0034] In summary, the present invention mainly has the following beneficial effects:

[0035] The present application sets a material box, and the vibrating screen component vibrates it up and down to make the particles jump and flip on the filter plate, effectively avoiding the accumulation and adhesion of particles, and removes the residual liquid on the surface of the particles through the filter screen, thereby reducing the total amount of water that needs to be evaporated in the hot air drying stage, improving the drying efficiency, shortening the drying time and reducing energy consumption. The vibrating screen component also intermittently moves the filter plate, so that the particles can enter the drying chamber evenly in batches, further optimizing the particle fluidity and drying uniformity of the drying chamber. The vibration process causes large particles and small particles to be automatically stratified, and large particles receive hot air drying before small particles, making full use of the different specific surface area characteristics of the two types of particles, so that large particles can reduce the moisture content over a long period of time, while small particles have a large surface area and a large contact area with hot air, and can achieve the ideal drying effect in a short time. In addition, the vibration of the drying chamber and the rotation of the drying tube in the chamber work together, not only to make the particles continue to jump and redistribute during the drying process, enhance the sufficiency and uniformity of the contact between hot air and particles, but also to avoid particle accumulation and adhesion, further improving the drying efficiency. The rotation of the drying tube in the drying chamber effectively prevents the hot air from forming local stagnation areas inside and outside the tube wall, ensuring uniform flow of hot air, improving hot air utilization efficiency and drying effect, and at the same time driving the particles in the chamber to continuously flip and move, so that the surface of the particles is more fully in contact with the hot air, thereby optimizing the overall drying process, significantly reducing the moisture content of the resin particles, ensuring the drying uniformity and performance stability of the product, and providing reliable guarantee for the performance of super absorbent resin products. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 It is a schematic diagram of the drying box structure of the present invention;

[0038] Figure 3 It is a schematic diagram of the material box structure of the present invention;

[0039] Figure 4 It is a schematic diagram of the structure of the annular boss a and the annular boss b of the present invention;

[0040] Figure 5 It is a schematic diagram of the structure of gear a and gear b of the present invention;

[0041] Figure 6 It is a schematic diagram of the drying chamber structure of the present invention.

[0042] Reference numerals:

[0043] 100, drying equipment; 101, drying box; 102, material box; 103, discharge port; 104, filter plate; 105, filter screen a; 106, drying chamber; 107, discharge port; 108, drying tube; 109, drying port;

[0044] 200, rotating shaft; 201, rotating disk a; 202, roller a; 203, annular boss a; 204, spring a; 205, connecting shaft; 206, gear a; 207, lead screw; 208, spring b; 209, annular boss b; 210, rotating disk b; 211, roller b; 212, gear b;

[0045] 300, hot air blower; 301, delivery pipe; 302, sleeve; 303, connecting cavity; 304, connecting port; 305, filter screen b; 306, protective cover;

[0046] 400, cylinder; 401, spring rod; 402, baffle; 403, guide frame; 404, exhaust port; 405, drain pipe a; 406, drain pipe b; 407, base; 408, motor. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] refer to Figure 1-Figure 6 , a method for producing a super absorbent resin that absorbs 1000 times more water, comprising:

[0049] Step 1: Take 16.39% acrylic acid (about 100g) and add it into the reaction vessel, add 1.64% sodium hydroxide solution (neutralized to pH 6.5-7.5). During the neutralization process, stir slowly to avoid local overreaction;

[0050] Step 2: Dissolve 0.016% potassium persulfate (about 0.1 g) in a small amount of deionized water in a small container and store it separately. Dissolve 0.008% sodium sulfite (about 0.05 g) in deionized water as an auxiliary initiator and keep it aside.

[0051] Step 3: Dissolve 0.008% to 0.016% N,N'-methylenebisacrylamide (about 0.05g to 0.1g) in a small amount of deionized water, stir evenly, and set aside;

[0052] Step 4: Add about 0.16% (<1g) of hydrogen peroxide to deionized water to improve polymerization efficiency;

[0053] Step 5: Pour 81.97% deionized water (about 500g) into the reactor, heat to 50°C-70°C, and slowly add the prepared acrylic acid solution (monomer solution) under steady stirring. Ensure uniform mixing and maintain the pH value after neutralization, add the crosslinker solution and auxiliary additives in turn, and stir for 5 minutes until the solution is uniform;

[0054] Step 6: Slowly drip the initiator solution (potassium persulfate and sodium sulfite), control the dripping rate, and avoid excessive local reaction causing uncontrolled temperature rise. The reaction temperature is controlled at 60℃~80℃, and the reaction time is about 30 minutes to 1 hour, until a gel polymer is formed. If the temperature is too high during the reaction, it can be kept stable by cooling water;

[0055] Step 7: Take out the gel-like super absorbent resin product from the reactor, wash it with deionized water several times to remove unreacted monomers and impurities, and dry it with hot air at 60°C to 80°C until the water content drops to <5%. The dried resin block is processed by mechanical crushing equipment to the target particle size (such as 100 to 300 mesh);

[0056] Step 8: Distribute the crushed resin particles evenly in a container, and use a spray device to spray a crosslinking agent solution (such as divinylbenzene) or a hydrophobic modifier. Dry the particles at a low temperature (50°C to 60°C) using a drying device 100 to enhance the water absorption rate and durability of the particles;

[0057] The highly absorbent resin prepared by the above steps has a precise and reasonable formula design, scientifically optimized process steps, and exhibits excellent technical effects. First, the amount of acrylic acid used is 16.39%, and by adding 1.64% sodium hydroxide solution to neutralize it to pH 6.5-7.5, it not only ensures the stability of the system, but also effectively improves the uniformity of the reaction, avoiding local overreaction caused by unstable pH value. At the same time, the initiator adopts a two-step configuration of 0.016% potassium persulfate and 0.008% sodium sulfite. The synergistic effect of the two is used to improve the generation rate of free radicals and the reaction efficiency, ensuring the uniformity and integrity of the polymer chain.

[0058] The proportion of cross-linking agent N,N'-methylenebisacrylamide in the formula is 0.008% to 0.016%. This range is designed just right, which can not only provide sufficient cross-linking to form a three-dimensional network structure, but also avoid the problem of decreased water absorption rate caused by excessive cross-linking density. 0.16% of hydrogen peroxide is added as an auxiliary oxidant to further improve the efficiency of free radical generation, shorten the polymerization time, and enhance the stability and safety of the polymerization process. Deionized water accounts for 81.97%, which not only provides an excellent reaction medium, but also creates conditions for controlling system concentration and heat transfer, thereby improving the uniformity of the polymerization reaction and product quality.

[0059] In the specific process, in step 5, by heating deionized water to 50℃~70℃ and gradually adding acrylic acid solution, the reaction temperature and neutralization pH value are precisely controlled to ensure the full mixing of the monomer solution with the crosslinker and additives, and to avoid the problem of local overheating. Subsequently, in step 6, the initiator solution is slowly added dropwise to effectively avoid the violent reaction caused by the high concentration of initiator in the local area. At the same time, the reaction temperature is controlled at 60℃~80℃, and the reaction time is about 30 minutes to 1 hour, ensuring that the generated gel polymer has an ideal network structure and mechanical properties.

[0060] The drying process of step 7 reduces the water content of the gel-like super absorbent resin to less than 5% under hot air conditions at 60°C to 80°C, which not only improves the efficiency of the subsequent crushing process, but also obtains uniform particles in the range of 100 to 300 meshes through mechanical crushing, which is suitable for a variety of uses. Finally, step 8 uses spraying of a crosslinking agent solution (such as divinylbenzene) or a hydrophobic modifier and drying at a low temperature of 50°C to 60°C. This design greatly improves the water absorption rate of the resin particles by forming a uniform crosslinking modification layer on the surface of the particles, while enhancing the mechanical strength and durability of the particles in a high humidity environment.

[0061] Overall, the super absorbent resin produced using the above formula and process has a water absorption rate of more than 1,000 times, and performs well in terms of water absorption rate, compressive strength and service life. Through the precise ratio of acrylic acid, crosslinking agent, initiator and modifier, the resin can be adapted to a variety of usage scenarios, including sanitary products, agricultural water retention agents and industrial adsorption materials, fully demonstrating its superiority in water absorption performance and structural stability.

[0062] The drying device 100 described in step eight includes:

[0063] Drying box 101;

[0064] A material box 102 is arranged in the drying box body 101, and discharge ports 103 communicating with the drying box body 101 are opened on both sides of the material box 102;

[0065] A filter plate 104 is provided on the material box 102, and a filter screen a105 is provided on the filter plate 104;

[0066] A drying chamber 106 is provided in the drying box 101, and a material discharge port 107 is provided at the bottom of the drying chamber 106;

[0067] A plurality of drying tubes 108 are disposed in the drying chamber 106, and a plurality of drying ports 109 are opened on the drying tubes 108;

[0068] The hot air conveying component provided between the drying box 101 and the drying chamber 106 is used to output the hot air into the drying tube 108;

[0069] The vibrating screen component disposed in the drying box body 101 is used to vibrate the material box 102 and the drying chamber 106 up and down. The vibrating screen component can intermittently move the filter plate 104 when vibrating the material box 102 up and down, and the filter plate 104 moves toward the discharge port 103, shortening the distance between the filter plate 104 and the discharge port 103;

[0070] The vibrating screen component can also rotate the plurality of drying tubes 108 while vibrating the drying chamber 106 up and down;

[0071] By setting up the material box 102, the resin particles after the crosslinking agent solution is sprayed by the spray equipment in step eight can be put into the material box 102, and the filling amount is not higher than the height of the discharge port 103 as much as possible. Specifically, the vibrating screen component is started, and the vibrating screen component can vibrate the material box 102 and the drying chamber 106 up and down. When the material box 102 vibrates, the resin particles in the material box 102 will be affected by the up and down vibration of the vibrating screen component, so that the particles will continuously jump and turn on the filter plate 104. This vibration method can not only effectively avoid the accumulation and adhesion of particles, but also the liquid remaining on the surface of the particles can be vibrated and sieved to the bottom of the filter plate 104 through the filter screen, which can reduce the liquid on the surface of the particles and provide more favorable conditions for subsequent hot air drying. As the vibrating screen component works, the filter plate 104 can intermittently move toward the discharge port 103. During this process, a portion of the resin particles that are flush with or protruding above the discharge port 103 can fall from the discharge port 103 to the drying chamber 106 under the action of vibration and self-gravity. The resin particles are put in batches to ensure that the amount of particles entering the drying chamber 106 each time is uniform and not excessive. In addition, during the vibration process, large particles are easy to move to the upper layer under the action of vibration due to their large mass and inertia, while small particles are easy to slide downward through the gaps between particles. Therefore, in the material layer, small particles will gradually concentrate at the bottom and large particles at the top. The large particle resin will reach the discharge port 103 first, fall from the discharge port 103, and receive hot air drying before the small particle resin, thereby ensuring that the large particle resin reduces the moisture content through a longer drying time. Since the small particle resin is located below the material layer, the moving path in the material box 102 is longer, and the time it enters the drying chamber 106 to receive hot air is relatively delayed, but because the small particle resin has a larger specific surface area, the contact area with the hot air is larger, and the water evaporation efficiency is higher, so its drying speed is faster than that of the large particle resin. Even if the small particles enter the drying chamber 106 later, the ideal drying effect can be achieved in a shorter time. In summary, removing part of the moisture on the surface of the resin particles by vibration before hot air drying can improve the drying efficiency, reduce the total amount of moisture that needs to be evaporated in the hot air drying stage, thereby shortening the drying time and reducing energy consumption. At the same time, the vibration process helps to avoid particle accumulation and adhesion, ensure that the particles are evenly distributed, and improve the uniformity and effect of drying. This pretreatment step provides more favorable conditions for subsequent hot air drying. In addition, while the vibrating screen component vibrates the material box 102, it can also vibrate the drying chamber 106, and can also rotate the multiple drying tubes 108. The vibration of the drying chamber 106 can drive the resin particles in the chamber to flip. The frequency of the particle surface being exposed to the hot air increases, which not only improves the evaporation rate of the water on the particle surface, but also effectively avoids the problem of particle accumulation or adhesion. The vibration of the drying chamber 106 causes the particles to continuously jump and redistribute during the drying process, further enhancing the contact efficiency between the hot air and the particles.The rotation of the drying tube 108 allows the hot air to flow more evenly through its interior and surroundings, avoiding the formation of local hot air stagnation areas in or around the tube due to being fixed, thereby improving the utilization efficiency and drying effect of the hot air. The rotation of the drying tube 108 in the drying chamber 106 can also drive the resin particles in the chamber to flip and move, so that the relative positions between the particles are constantly changing, ensuring that the hot air can fully contact all surfaces of the particles. Through the synergistic effect of the vibration of the drying chamber 106 and the rotation of the drying tube 108, the entire drying process is optimized, the moisture content of the resin particles is effectively reduced, and a more uniform drying effect is achieved, providing a more reliable guarantee for the performance of the highly absorbent resin product.

[0072] As a further solution of the present invention, the vibrating screen component includes a rotating shaft 200 rotatably connected to the drying box 101, a rotating disk a201 is connected to the rotating shaft 200, a plurality of rollers a202 are rotatably connected to the rotating disk a201, an annular boss a203 in contact with the rollers a202 is connected to the bottom of the material box 102, and a spring a204 is provided between the material box 102 and the drying box 101;

[0073] By setting a rotating shaft 200, the rotating shaft 200 is used to drive the turntable a201 to rotate. The multiple rollers a202 connected to the turntable a201 contact and act on the annular boss a203 at the bottom of the material box 102 during the rotation process, so that the material box 102 generates periodic vibrations; at the same time, by setting a spring a204 between the material box 102 and the drying box 101, the spring a204 can provide a rebound force under the force of the roller a202, so that the vibration is more stable and uniform, so that the resin particles in the material box 102 jump and turn over during the vibration process, avoiding the accumulation and adhesion of particles, improving the removal effect of the surface liquid, and providing more uniform initial conditions for the subsequent drying process. This structural design is not only simple and reliable, but also can effectively improve the vibration efficiency, further optimize the pretreatment process of the resin particles, thereby improving the drying effect and overall performance of the product.

[0074] As a further solution of the present invention, the vibrating screen component also includes a connecting shaft 205 rotatably connected to the material box 102, the connecting shaft 205 is slidably connected to the top of the rotating shaft 200, the connecting shaft 205 is connected to a gear a206, the gear a206 is an incomplete gear, the material box 102 is rotatably connected to a lead screw 207, the filter plate 104 is threadedly connected to the lead screw 207, and the lead screw 207 is connected to a gear b212;

[0075] By setting the connecting shaft 205, the gear a206 as an incomplete gear cooperates with the gear b212 on the lead screw 207 to drive the lead screw 207 to rotate, thereby driving the filter plate 104 to move along the axial direction of the lead screw 207 in the material box 102. Since the gear a206 is designed as an incomplete gear, the movement of the filter plate 104 has a certain intermittent nature. After the resin particles fall from the discharge port 103 due to the vibration, it can be avoided that the resin particles are all discharged at once during the vibration process, but the particles are released in batches and step by step. In this way, too many particles can be prevented from entering the drying chamber 106 at one time, ensuring the uniformity and stability of the drying process.

[0076] As a further solution of the present invention, the vibrating screen component further includes a spring b208 connected between the drying chamber 106 and the drying box 101, the inner bottom surface of the drying chamber 106 is connected to an annular boss b209, the rotating shaft 200 is connected to a rotating disk b210, and the rotating disk b210 is rotatably connected to a roller b211 in contact with the annular boss b209;

[0077] By setting the spring b208, the spring b208 will provide a flexible support, so that the drying chamber 106 can produce periodic up and down movement during the vibration process, and the turntable b210 and the roller b211 are in contact with the annular boss b209. When the rotating shaft 200 rotates, the roller b211 can touch the annular boss b209, driving the drying chamber 106 to vibrate, so that the drying chamber 106 moves up and down periodically during the vibration process. It can ensure that the particles are uniformly vibrated in the drying chamber 106, avoid the accumulation and adhesion of particles, enhance the contact efficiency between the hot air and the particle surface, increase the water evaporation rate, and optimize the overall drying effect.

[0078] As a further solution of the present invention, the hot air conveying component includes a hot air blower 300 connected to the drying box 101, the air outlet of the hot air blower 300 is connected to a conveying pipe 301 extending into the drying box 101, one end of the conveying pipe 301 is connected to a sleeve 302, the sleeve 302 is rotatably sleeved on the outside of the rotating shaft 200, a connecting cavity 303 is provided in the rotating shaft 200, a connecting port 304 communicating with the sleeve 302 is provided on the connecting cavity 303, the drying pipe 108 is connected to the rotating shaft 200 and communicates with the connecting cavity 303, and a filter b305 is provided in the drying port 109;

[0079] By providing the hot air blower 300, a continuous flow of hot air can be provided to flow into the drying box 101, thereby achieving efficient drying of the resin particles. The air outlet of the hot air blower 300 is connected to the conveying pipe 301 extending into the drying box 101, and the hot air is conveyed to the sleeve 302 through the conveying pipe 301. At the same time, the connecting cavity 303 in the rotating shaft 200 is connected to the sleeve 302 through the connecting port 304, thereby ensuring that the hot air can enter the drying tube 108 through the connecting cavity 303. The connection between the drying tube 108 and the connecting cavity 303 ensures that the hot air can flow evenly through the drying tube 108 and further enter the drying chamber 106. Since the drying tube 108 is connected to the rotating shaft 200, when the rotating shaft 200 rotates, it can drive the drying tube 108 to rotate together, thereby achieving uniform distribution of the hot air in the drying chamber 106. The rotating drying tube 108 can effectively promote the turning and movement of the resin particles in the drying chamber 106, ensuring that all surfaces of the resin particles can fully contact the hot air, thereby improving the drying efficiency and uniformity. Since the hot air blower 300 provides a continuous hot air flow, the circulation of the hot air in the drying chamber 106 can not only accelerate the evaporation of water, but also avoid the problem of uneven drying caused by uneven hot air. Through this design, the hot air can fully penetrate into the drying chamber 106, thereby ensuring uniform drying of the resin particles, reducing the drying time, and improving the overall production efficiency.

[0080] As a further solution of the present invention, a protective sleeve 306 is connected to the rotating shaft 200, and the protective sleeve 306 is sleeved on the outside of the rotating disk b210 and the annular boss b209, and the drying pipe 108 passes through the protective sleeve 306 and extends into the drying chamber 106;

[0081] By providing the protective sleeve 306, the contact area between the turntable b210 and the annular boss b209 can be effectively protected to prevent resin particles from entering this key position, thereby avoiding problems such as rotation obstruction or component wear caused by the accumulation of resin particles.

[0082] As a further solution of the present invention, a cylinder 400 is connected to the drying box 101, a spring rod 401 is connected to the telescopic shaft of the cylinder 400, and a baffle 402 is connected to one end of the spring rod 401, and the baffle 402 covers the feed opening 107;

[0083] By setting the baffle 402, the baffle 402 can close the material discharge port 107, and the spring rod 401 is initially in an energy storage state, so that when the drying chamber 106 vibrates up and down, the baffle 402 can follow well to prevent the material discharge port 107 from being opened in advance; and when the telescopic shaft of the cylinder 400 is retracted, the spring rod 401 drives the baffle 402 to leave the material discharge port 107, so that the particles can be discharged smoothly. Such a design can flexibly control the material discharge rhythm according to actual needs. Compared with directly setting the cylinder 400 on the drying chamber 106, the spring rod 401 can absorb part of the energy in the mechanical movement, avoiding damage to the cylinder 400 due to vibration.

[0084] As a further solution of the present invention, a guide frame 403 communicating with the discharge port 103 is connected to one side of the material box 102, and an exhaust port 404 is opened on one side of the material box 102;

[0085] By providing the guide frame 403, the resin particles can be effectively guided by the guide frame 403 when falling from the discharge port 103. The exhaust port 404 can optimize the airflow circulation in the material box 102, maintain the air pressure balance inside the material box 102, and effectively discharge the moisture in the material box 102 to prevent the moisture from being retained in the material box 102.

[0086] As a further solution of the present invention, one side of the material box 102 is connected to a drain pipe a405, one side of the drying box 101 is connected to a drain pipe b406, and the drain pipe a405 is slidably connected to the drain pipe b406;

[0087] By setting up the drain pipe a405, the drain pipe a405 is connected with the drain pipe b406, so that the water accumulated in the material box 102 can be discharged in time.

[0088] As a further solution of the present invention, a base 407 is connected to the bottom of the drying box 101, a motor 408 is connected to the base 407, and a driving shaft of the motor 408 is connected to the rotating shaft 200;

[0089] By providing the motor 408 , a driving force can be provided for the rotation of the rotating shaft 200 .

[0090] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for producing a super absorbent resin that absorbs 1000 times more water, characterized in that: include: Step 1: Add 16.39% acrylic acid into a reaction vessel and add 1.64% sodium hydroxide solution. Stir slowly during the neutralization process. Step 2: Dissolve 0.016% potassium persulfate in deionized water in a small container and store it separately. Dissolve 0.008% sodium sulfite in deionized water as an auxiliary initiator and keep it aside. Step 3: Dissolve 0.008% to 0.016% of N,N'-methylenebisacrylamide in a small amount of deionized water, stir evenly, and set aside; Step 4: Add about 0.16% hydrogen peroxide to deionized water to improve polymerization efficiency; Step 5: Pour 81.97% deionized water into the reactor, heat to 50°C, slowly add the prepared acrylic acid solution under stable stirring, add the crosslinker solution and auxiliary additives in sequence, and stir for 5 minutes until the solution is uniform; Step 6: Slowly add the initiator solution dropwise, control the dropwise acceleration rate, control the reaction temperature at 60°C, and the reaction time is about 30 minutes, until a gel polymer is formed; Step 7: The gel-like super absorbent resin product is taken out from the reactor, washed with deionized water for multiple times to remove unreacted monomers and impurities, and dried with hot air at 60° C. until the water content is reduced to <5%. The dried resin block is processed by mechanical crushing equipment to a target particle size; Step 8: Distribute the crushed resin particles evenly in a container, spray the crosslinking agent solution using a spray device, and dry them at 50° C. using a drying device (100) to enhance the water absorption rate and durability of the particles; The drying device (100) described in step eight comprises: Drying box (101); A material box (102) is arranged in the drying box body (101), and discharge ports (103) communicating with the drying box body (101) are provided on both sides of the material box (102); A filter plate (104) disposed on the material box (102), wherein a filter screen a (105) is disposed on the filter plate (104); A drying chamber (106) is arranged in the drying box (101), and a material discharge port (107) is provided at the bottom of the drying chamber (106); A plurality of drying tubes (108) are arranged in the drying chamber (106), and a plurality of drying ports (109) are provided on the drying tubes (108); A hot air conveying component disposed between the drying box (101) and the drying chamber (106), used for outputting hot air into the drying tube (108); A vibrating screen component is arranged in the drying box body (101), and is used to vibrate the material box (102) and the drying chamber (106) up and down. The vibrating screen component can intermittently move the filter plate (104) when vibrating the material box (102) up and down, and the filter plate (104) moves toward the discharge port (103), thereby shortening the distance between the filter plate and the discharge port (103); The vibrating screen component is also capable of rotating the plurality of drying tubes (108) when vibrating the drying chamber (106) up and down.

2. A method for producing a super absorbent resin that absorbs 1000 times more water according to claim 1, characterized in that: The vibrating screen component comprises a rotating shaft (200) rotatably connected to the drying box (101); a rotating disk a (201) is connected to the rotating shaft (200); a plurality of rollers a (202) are rotatably connected to the rotating disk a (201); an annular boss a (203) in contact with the rollers a (202) is connected to the bottom of the material box (102); and a spring a (204) is provided between the material box (102) and the drying box (101).

3. A method for producing a super absorbent resin that absorbs 1000 times as much water as claimed in claim 2, characterized in that: The vibrating screen component also includes a connecting shaft (205) rotatably connected to the material box (102), the connecting shaft (205) is slidably connected to the top of the rotating shaft (200), the connecting shaft (205) is connected to a gear a (206), the gear a (206) is an incomplete gear, the material box (102) is rotatably connected to a lead screw (207), the filter plate (104) is threadedly connected to the lead screw (207), and the lead screw (207) is connected to a gear b (212).

4. A method for producing a super absorbent resin that absorbs 1000 times more water according to claim 2, characterized in that: The vibrating screen component also includes a spring b (208) connected between the drying chamber (106) and the drying box (101); the inner bottom surface of the drying chamber (106) is connected to an annular boss b (209); the rotating shaft (200) is connected to a rotating disk b (210); and the rotating disk b (210) is rotatably connected to a roller b (211) in contact with the annular boss b (209).

5. A method for producing a super absorbent resin that absorbs 1000 times as much water as claimed in claim 4, characterized in that: The hot air conveying component comprises a hot air blower (300) connected to the drying box (101); the hot air blower (300) is connected to a conveying pipe (301) extending into the drying box (101) at an air outlet; one end of the conveying pipe (301) is connected to a sleeve (302); the sleeve (302) is rotatably sleeved on the outside of the rotating shaft (200); a connecting cavity (303) is provided in the rotating shaft (200); a connecting port (304) communicating with the sleeve (302) is provided in the connecting cavity (303); the drying pipe (108) is connected to the rotating shaft (200) and communicates with the connecting cavity (303); a filter screen b (305) is provided in the drying port (109).

6. A method for producing a super absorbent resin that absorbs 1000 times as much water as claimed in claim 4, characterized in that: The rotating shaft (200) is connected with a protective sleeve (306), the protective sleeve (306) is sleeved on the outside of the rotating disk b (210) and the annular boss b (209), and the drying pipe (108) passes through the protective sleeve (306) and extends into the drying chamber (106).

7. A method for producing a super absorbent resin that absorbs 1000 times as much water as claimed in claim 1, characterized in that: The drying box (101) is connected to a cylinder (400), a spring rod (401) is connected to the telescopic shaft of the cylinder (400), one end of the spring rod (401) is connected to a baffle (402), and the baffle (402) covers the feed opening (107).

8. A method for producing a super absorbent resin that absorbs 1000 times more water according to claim 1, characterized in that: One side of the material box (102) is connected to a guide frame (403) that is in communication with the discharge port (103), and one side of the material box (102) is provided with an exhaust port (404).

9. A method for producing a super absorbent resin that absorbs 1000 times more water according to claim 1, characterized in that: One side of the material box (102) is connected to a drain pipe a (405), and one side of the drying box body (101) is connected to a drain pipe b (406), and the drain pipe a (405) is slidably connected to the drain pipe b (406).

10. A method for producing a super absorbent resin that absorbs 1000 times as much water as claimed in claim 2, characterized in that: The bottom of the drying box (101) is connected to a base (407), the base (407) is connected to a motor (408), and the driving shaft of the motor (408) is connected to the rotating shaft (200).

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