Stirring device for non-ionic surfactant production

Abstract

The invention discloses a stirring device for nonionic surfactant production, and belongs to the technical field of active agent processing.The stirring device comprises a stirring tank, a sealing cover is fixed to the top of the stirring tank in a sealed mode, and a multi-dimensional mixing and stirring device integrating the functions of precipitation prevention, smashing, stirring and residue prevention is arranged in the stirring tank; and the multi-dimensional mixing and stirring device comprises a bidirectional anti-precipitation stirring assembly, an autorotation stirring and crushing assembly, an offset driving assembly and an anti-residue assembly. According to the present invention, by arranging the bidirectional anti-precipitation stirring assembly, the autorotation stirring crushing assembly and the offset driving assembly, the multi-dimensional stirring and crushing effects can be achieved, the dead zone is eliminated, the apparatus is especially suitable for the high viscosity system, the micro-level uniform dispersion of the raw material is ensured, the material precipitation is effectively avoided, and the probability of the bubble generation of the material is reduced; and through the arrangement of the residue preventing assembly and the residue cleaning assembly, the equipment is kept clean, the maintenance period is prolonged, and cross contamination of materials and resource waste are avoided.

Description

Technical Field

[0001] This invention belongs to the field of surfactant processing technology, and specifically relates to a stirring device for the production of nonionic surfactants. Background Technology

[0002] Nonionic surfactants are a class of surfactants that do not ionize or carry a charge in water. Their molecular structure consists of hydrophilic groups (such as polyoxyethylene chains) and hydrophobic groups (such as alkyl chains). The hydrophilic groups interact with water molecules, while the hydrophobic groups interact with nonpolar substances. In solution, they can reduce the surface tension of the liquid surface, improve the wettability of the liquid, and form molecular aggregates at the interface.

[0003] The production of nonionic surfactants requires a stirring process. Most of the raw materials that need to be stirred are liquids, and the various raw solutions are mixed together through stirring.

[0004] However, due to the different fluidity, density and other properties of various raw materials, precipitation will occur when the stirring is not uniform, causing different types of raw materials to separate into layers, which seriously affects the performance of surfactants. At the same time, insufficient stirring will also generate bubbles in the surfactant solution. These bubbles will affect the purity, performance and appearance of the product. Furthermore, the material will gradually thicken or even lose its fluidity in the later stages of stirring, making the role of a single stirring structure more limited and difficult to achieve uniform and sufficient stirring. In addition, the thickened material is not only difficult to discharge, but will also remain in large quantities on the inner wall of the stirring tank, resulting in resource waste. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a stirring device for the production of nonionic surfactants.

[0006] The technical solution adopted to solve the above technical problems is: a stirring device for the production of nonionic surfactants, including a stirring tank, the top of which is sealed and fixed with a cap, and the interior of which is provided with a multi-dimensional mixing and stirring device that integrates anti-sedimentation, crushing, stirring and anti-residue functions; The multidimensional mixing and stirring device includes a bidirectional anti-sedimentation stirring component for convective mixing and shearing of raw materials. Several rotating stirring and pulverizing components and offset driving components are vertically equidistantly arranged around the bidirectional anti-sedimentation stirring component and between it and the inner wall of the mixing tank. The rotating stirring and pulverizing components are driven by the bidirectional anti-sedimentation stirring component. The offset driving components drive the rotating stirring and pulverizing components to move laterally back and forth in the stirring and pulverizing position. The side wall of the bidirectional anti-sedimentation stirring component is equipped with an anti-residue component to scrape off the residual material on the inner wall of the mixing tank.

[0007] Furthermore, the bidirectional anti-sedimentation stirring assembly includes a motor fixedly installed on the top of the cap, a first rotating shaft and a second rotating shaft arranged along the same vertical axis. The output end of the motor is fixedly connected to the top of the first rotating shaft. Spiral stirring blades and serrated dispersion discs are fixedly connected to the outer walls of the first rotating shaft and the second rotating shaft. A reversing mechanism for self-driving the second rotating shaft to rotate in the opposite direction is provided between the first rotating shaft and the second rotating shaft. The area between the first rotating shaft and the second rotating shaft is set as a mixing zone, and the serrated dispersion discs are all located in the mixing zone.

[0008] Furthermore, the reversing mechanism includes a fixed frame fixed to the inner wall of the mixing tank, a bevel gear one fixed to the bottom end of a rotating shaft one, and a bevel gear two fixed to the top end of a rotating shaft two. A fixed shell is fixed to the central inner wall of the fixed frame. Both bevel gear one and bevel gear two are located inside the fixed shell. A bevel gear three is rotatably connected to the inner wall of the fixed shell through a rotating shaft. The bevel gear three meshes with bevel gear one and bevel gear two.

[0009] Through the above technical solution, the dual rotating shafts achieve reverse synchronous rotation through the bevel gear reversing mechanism. Combined with the spiral stirring blades and the serrated dispersion disk, a strong convection circulation and shear force are formed. The three-dimensional turbulent field effectively breaks down material stratification and eliminates dead zones. It is especially suitable for high viscosity systems, ensuring uniform dispersion of raw materials at the microscopic level. High shear elements are centrally arranged in the mixing zone between the two shafts. The negative pressure adsorption effect is formed by utilizing the principle of fluid dynamics, which promotes the forced exchange of light and heavy components. It is suitable for homogenization of systems with high density differences.

[0010] Furthermore, the self-rotating mixing and pulverizing assembly includes an upper gear ring fixed to the inner wall of the mixing tank, rotating rods symmetrically rotatably connected to the side walls of rotating shaft one and rotating shaft two, and symmetrically arranged pulverizing and mixing blades. The rotating rods are all located above the upper gear ring. A gear is fixedly connected to one end of the rotating rod near the upper gear ring, and the bottom of the gear meshes with the top of the upper gear ring. A baffle is fixedly fitted to the outer wall of the rotating rod near the spiral mixing blade. A cross-shaped limiting protrusion is provided on the outer wall of the middle end of the rotating rod. A cross-shaped limiting groove is provided on the rotation axis of each pulverizing and mixing blade. The inner wall of the cross-shaped limiting groove is slidably connected to the outer wall of the cross-shaped limiting protrusion. A spring is fixedly connected between the baffle and the pulverizing and mixing blade on the same side. The pulverizing and mixing blade and the upper gear ring do not contact each other.

[0011] Through the above technical solution, the self-rotating mixing and pulverizing component is driven by the meshing of the upper gear ring and gears, so that the rotating rod rotates while moving in conjunction with the main shaft, driving the pulverizing and mixing blades to revolve and rotate, thus expanding the range of pulverization and mixing. It can break lumps down to the micron level in real time. The compound motion can generate more collision opportunities, which helps to refine particles and improve pulverization efficiency. It is suitable for processing formulas with a large number of solid particles.

[0012] Furthermore, the offset drive assembly includes an annular housing fixed to the inner wall of the mixing tank and a second magnet fixed to the side of the pulverizing and mixing blade near the upper gear ring. The annular housing is located above the gear. The inner annular sidewall of the annular housing has several openings equidistantly arranged in a circumferential array. A first magnet is fixed to the inner sidewall of each opening. The first magnet and the second magnet are adjacent to each other with the same pole.

[0013] Through the above technical solution, the offset drive component uses the principle of magnetic repulsion to make the crushing and stirring blades move laterally back and forth, which not only expands the coverage area but also avoids dead corners, making the stirring trajectory cover the entire tank cross section, eliminating the edge retention defects of traditional stirring, and further improving the uniformity of stirring.

[0014] Furthermore, the residue prevention component includes a scraper frame one symmetrically fixed to one side wall of the rotating shaft and a scraper frame two symmetrically fixed to the other side wall of the rotating shaft. Both scraper frame one and scraper frame two have grooves on their side walls corresponding to the positions of the annular shell. The inner side walls of the grooves are in contact with the outer side walls of the annular shell. An installation groove is provided at the bottom of each groove, and a residue cleaning component for cleaning the upper gear ring is installed in each of the installation grooves. The residue cleaning components on both sides are arranged in a rotational symmetrical manner. Inclined guide grooves are provided on the side wall surfaces of both scraper frame one and scraper frame two in a rotational symmetrical manner. The guide grooves cooperate with the residue cleaning components to guide the cleaned residue back to the center of the tank. The lower surface of scraper frame one is in contact with the upper surface of the fixed frame, and the upper surface of scraper frame two is in contact with the lower surface of the fixed frame. The bottom end of scraper frame two is an inclined surface. The bottom end of the inner wall of the mixing tank is provided with a guide inclined surface, which is in contact with the guide inclined surface.

[0015] Through the above technical solution, while the rotating shaft rotates, it drives scraper one and scraper two to scrape off the residual material adhering to the inner wall of the mixing tank, the outer wall of the upper gear ring, the upper and lower walls of the fixed frame, and the outer wall of the annular shell. The scraped-off residual material is guided back to the center. The inclined surface of the scraper is seamlessly connected with the inclined surface of the bottom guide of the tank to ensure that the residual material at the bottom is completely discharged, keep the equipment clean, extend the maintenance cycle, avoid cross-contamination of materials and waste of resources, and meet the GMP clean production requirements.

[0016] Furthermore, the residual material cleaning assembly includes a storage shell fixed to the inner wall of the mounting groove. The bottom end of the storage shell has a limiting port, and a cleaning plate is slidably connected to the inner wall of the limiting port. A limiting block is fixed to the top end of the cleaning plate, and a spring is fixed between the top end of the limiting block and the upper inner wall of the storage shell. The cleaning plate has a guide slope along the rotation direction of the adjacent gears. The bottom end of the cleaning plate abuts against the top end of the upper gear ring. A guide plate is fixed to the bottom end of the storage shell. The guide plates are all located in front of the adjacent guide plates, and the guide plates are all corresponding to the position of the guide groove.

[0017] Through the above technical solution, the scraper rotates while driving the residual material cleaning component to rotate. The elasticity of spring two pushes the elastic cleaning plate to adaptively fit the groove of the upper toothed ring. As the elastic cleaning plate revolves, it works with the guide slope to automatically scrape off the residual material in the groove of the upper toothed ring. The scraped-off residue is guided by the guide slope plate into the guide channel, and finally flows back to the center of the tank to be introduced into the next batch of circulation. This reduces material waste, avoids material residue in the dead corner of the groove, and further improves cleaning quality and efficiency.

[0018] Furthermore, each of the mixing tanks has a receiving cavity inside its wall, and a heating coil is evenly wound inside the receiving cavity. A temperature sensor is installed at the top of the cover, and the probe of the temperature sensor is located inside the mixing tank. The outer wall of the mixing tank is covered with a heat insulation sleeve, and several support legs are installed at the bottom of the side wall of the heat insulation sleeve. A controller is installed on the outer wall of the heat insulation sleeve, and the controller is electrically connected to the heating coil and the temperature sensor.

[0019] Through the above technical solution, the heating coil is built into the tank wall storage cavity, and the heat insulation sleeve achieves temperature control accuracy at ±℃ level. The temperature sensor feeds back data to the controller in real time, accurately maintaining the temperature window required for the reaction. The heating power can be automatically adjusted according to the process stage to avoid local overheating of the material, which can cause boiling foaming and affect the quality of the finished product.

[0020] Furthermore, the top of the cover is connected to a feed pipe and an air inlet pipe, and the bottom of the mixing tank is connected to a discharge pipe. Solenoid valves are installed in the feed pipe, air inlet pipe, and discharge pipe, and the solenoid valves are electrically connected to the controller.

[0021] Through the above technical solution, the controller integrates a PLC+HMI system to achieve automated collaboration. It automatically starts and stops heating / cooling based on temperature sensor signals, precisely controls the flow rate and timing of the feed pipe, air inlet pipe, and discharge pipe through solenoid valves, and monitors pressure changes to predict the reaction endpoint.

[0022] The beneficial effects of this invention are as follows: (1) By setting up a bidirectional anti-sedimentation stirring component, the two rotating shafts achieve reverse synchronous rotation through the bevel gear reversal mechanism. Combined with the spiral stirring blades and the sawtooth dispersion disk, a strong convection circulation and shear force are formed. The three-dimensional turbulent field effectively breaks down material stratification and eliminates dead zones. It is especially suitable for high viscosity systems, ensuring that the raw materials are uniformly dispersed at the micro level and effectively avoiding material sedimentation. (2) By setting up a self-rotating mixing and crushing component and an offset driving component, the self-rotating mixing and crushing component drives the crushing and mixing blades to revolve and rotate through meshing drive. The offset driving component uses the principle of magnetic repulsion to make the crushing and mixing blades move laterally back and forth, which not only expands the coverage area, but also avoids dead corners, and makes the stirring trajectory cover the entire tank cross section, eliminating the edge retention defects of traditional stirring, which helps to refine particles, improve crushing and stirring efficiency, and is suitable for processing formulas with more solid particles. The stirring is more uniform and reduces the probability of material generating bubbles. (3) By setting up the anti-residue component and the residual cleaning component, the scraper rotates with the rotating shaft to scrape off the residual material adhering to the inner wall of the mixing tank, the upper toothed ring, the fixed frame and the annular shell, and guides the scraped residual material back to the center. The residual cleaning component can actively remove the accumulated material on the upper toothed ring, keep the equipment clean, extend the maintenance cycle, and avoid cross-contamination of materials and waste of resources. (4) By setting the reversing mechanism, gears, and upper gear ring, only a single power source is needed to drive the bidirectional anti-sedimentation stirring component, the self-rotating stirring and crushing component, the offset driving component, the anti-residue component, and the residual material cleaning component to operate synchronously, thereby improving work efficiency and saving power resources significantly. Attached Figure Description

[0023] Figure 1 This is a perspective view of a stirring device for the production of nonionic surfactants according to the present invention; Figure 2 This is a structural diagram of a stirring device for the production of nonionic surfactants according to the present invention; Figure 3 This is a perspective view of a bidirectional anti-precipitation stirring component of a stirring device for the production of nonionic surfactants according to the present invention; Figure 4 This is a structural diagram of a reversing mechanism for a stirring device used in the production of nonionic surfactants according to the present invention; Figure 5 This is a structural diagram of a self-rotating stirring and pulverizing component of a stirring device for the production of nonionic surfactants according to the present invention; Figure 6 This is a structural diagram of the offset drive component of a stirring device for the production of nonionic surfactants according to the present invention; Figure 7 This is a perspective view of an anti-residue component of a stirring device for the production of nonionic surfactants according to the present invention; Figure 8 This is a structural diagram of a residue cleaning component of a stirring device for the production of nonionic surfactants according to the present invention; Figure 9 This is the present invention. Figure 2 Enlarged view of point A.

[0024] Reference numerals: 1. Mixing tank; 2. Multi-dimensional mixing and stirring device; 3. Cover; 4. Bidirectional anti-sedimentation stirring assembly; 5. Rotary stirring and pulverizing assembly; 6. Offset drive assembly; 7. Anti-residue assembly; 8. Residue cleaning assembly; 9. Discharge pipe; 10. Feed pipe; 11. Air inlet pipe; 12. Temperature sensor; 13. Controller; 14. Heating coil; 15. Heat insulation jacket; 16. Support leg; 101. Receiving cavity; 102. Guide slope; 401. Motor; 402. Rotating shaft one; 403. Rotating shaft two; 404. Spiral stirring blade; 405. Serrated dispersion disc; 406. Mixing zone; 407. Direction changing mechanism; 501. Upper gear ring; 502. Rotating rod; 503. Baffle; 5 04. Spring 1; 505. Crushing and stirring blade; 506. Gear; 601. Annular shell; 602. Through port; 603. Magnet 1; 604. Magnet 2; 701. Scraper 1; 702. Scraper 2; 703. Groove; 704. Mounting groove; 705. Guide groove; 706. Inclined surface; 801. Storage shell; 802. Limiting port; 803. Guide inclined plate; 804. Cleaning plate; 805. Limiting block; 806. Spring 2; 4071. Fixing shell; 4072. Bevel gear 1; 4073. Bevel gear 2; 4074. Rotating shaft; 4075. Bevel gear 3; 4076. Fixing frame; 5031. Cross limiting protrusion; 5051. Cross limiting groove; 8041. Guide inclined surface. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0026] like Figures 1-9 As shown, a stirring device for the production of nonionic surfactants in this embodiment includes a stirring tank 1, the top of the stirring tank 1 is sealed and fixed with a cap 3, and the interior of the stirring tank 1 is provided with a multi-dimensional mixing and stirring device 2 that integrates anti-sedimentation, crushing, stirring and anti-residue functions. The multidimensional mixing and stirring device 2 includes a bidirectional anti-settling stirring component 4 for convective mixing and shearing of raw materials. Several rotating stirring and pulverizing components 5 and offset driving components 6 are arranged vertically at equal intervals around the bidirectional anti-settling stirring component 4 and between it and the inner wall of the mixing tank 1. The rotating stirring and pulverizing components 5 are driven by the bidirectional anti-settling stirring component 4. The offset driving components 6 drive the rotating stirring and pulverizing components 5 to move laterally back and forth in the stirring and pulverizing position. The side wall of the bidirectional anti-settling stirring component 4 is equipped with an anti-residue component 7 for scraping off the residue on the inner wall of the mixing tank 1. The bidirectional anti-sedimentation stirring assembly 4 includes a motor 401 fixedly installed on the top of the cover 3, a first rotating shaft 402 and a second rotating shaft 403 arranged along the same vertical axis. The output end of the motor 401 is fixedly connected to the top of the first rotating shaft 402. Spiral stirring blades 404 and serrated dispersion discs 405 are fixedly attached to the outer walls of both the first rotating shaft 402 and the second rotating shaft 403. A reversing mechanism 407 for self-driving the second rotating shaft 403 to rotate in the opposite direction is provided between the first rotating shaft 402 and the second rotating shaft 403. The area between the first rotating shaft 402 and the second rotating shaft 403 is designated as a mixing area. Zone 406 and the serrated dispersion disk 405 are both located in the mixing zone 406. The two rotating shafts achieve synchronous counter-rotation through the reversing mechanism 407. Combined with the spiral stirring blade 404 and the serrated dispersion disk 405, a strong convection circulation and shear force are formed. The three-dimensional turbulent field effectively breaks down material stratification and eliminates dead zones. It is especially suitable for high viscosity systems and ensures uniform dispersion of raw materials at the microscopic level. The mixing zone 406 between the two shafts is equipped with high shear elements. It uses the principle of fluid dynamics to form a negative pressure adsorption effect, which promotes the forced exchange of light and heavy components. It is suitable for homogenization of systems with high density difference. The reversing mechanism 407 includes a fixed frame 4076 fixed to the inner wall of the mixing tank 1, a bevel gear 4072 fixed to the bottom of the first rotating shaft 402, and a bevel gear 4073 fixed to the top of the second rotating shaft 403. A fixed shell 4071 is fixedly connected to the inner wall of the center of the fixed frame 4076. The first bevel gear 4072 and the second bevel gear 4073 are both located inside the fixed shell 4071. A third bevel gear 4075 is rotatably connected to the inner wall of the fixed shell 4071 through a rotating shaft 4074. The third bevel gear 4075 meshes with the first bevel gear 4072 and the second bevel gear 4073. During operation, motor 401 drives rotating shaft 402 to rotate. Through the meshing transmission of bevel gear 4072, bevel gear 4073, and bevel gear 4075, rotating shaft 403 rotates in the opposite direction, which in turn drives the two spiral stirring blades 404 to rotate. This continuously conveys the material from the top and bottom of the tank to the middle mixing zone 406. In the mixing zone 406, rotating sawtooth dispersion disk 405 shears the material, making the material more finely dispersed and improving the mixing uniformity. Especially for high-viscosity surfactants, it effectively breaks up agglomeration and accelerates dissolution or reaction. The self-rotating mixing and pulverizing assembly 5 includes an upper gear ring 501 fixed to the inner wall of the mixing tank 1, rotating rods 502 symmetrically rotatably connected to the side walls of rotating shaft one 402 and rotating shaft two 403, and symmetrically arranged pulverizing and mixing blades 505. The upper gear ring 501 is made of high-molecular composite material, which ensures strength and reduces wear and noise. The rotating rods 502 are all located above the upper gear ring 501. A gear 506 is fixed to one end of the rotating rod 502 near the upper gear ring 501. The bottom of the gear 506 meshes with the top of the upper gear ring 501. A baffle 503 is sleeved and fixed to the outer wall of the rotating rod 502 near the spiral mixing blade 404. A cross-shaped limiting protrusion 5031 is opened on the outer wall of the middle end of the rotating rod 502. The pulverizing and mixing blades 505... The rotating shaft of component 5 is provided with a cross-shaped limiting groove 5051. The inner sidewall of the cross-shaped limiting groove 5051 is slidably connected to the outer sidewall of the cross-shaped limiting protrusion 5031. A spring 504 is fixedly connected between the baffle 503 on the same side and the crushing and stirring blade 505. The crushing and stirring blade 505 does not contact the upper gear ring 501. The self-rotating stirring and crushing component 5 is driven by the meshing of the upper gear ring 501 and the gear 506, so that the rotating rod 502 rotates while moving in conjunction with the main shaft, driving the crushing and stirring blade 505 to revolve and rotate, expanding the crushing and stirring range, and breaking lumps down to the micron level in real time. The compound motion can generate more collision opportunities, which helps to refine particles and improve crushing efficiency. It is suitable for processing formulas with a large number of solid particles. During operation, the rotating shaft drives the rotating rod 502 to revolve around the axis, which in turn drives the gear 506 to mesh along the upper gear ring 501, thereby causing the rotating rod 502 to rotate. The cross-shaped limiting protrusion 5031 of the rotating rod 502 limits the cross-shaped limiting groove 5051 of the crushing and stirring blade 505, causing the crushing and stirring blade 505 to rotate. The crushing and stirring blade 505 achieves a composite motion of revolution and rotation, which performs multi-dimensional crushing of materials, greatly improving the efficiency of crushing and stirring. It is particularly suitable for the continuous production of high viscosity systems such as polyether surfactants, avoiding local overheating or degradation caused by long-term retention of large pieces of material. The offset drive assembly 6 includes an annular housing 601 fixed to the inner wall of the mixing tank 1 and a second magnet 604 fixed to the side of the grinding and stirring blade 505 near the upper gear ring 501. The annular housing 601 is located above the gear 506. The inner annular sidewall of the annular housing 601 has several openings 602 evenly spaced along the circumference. A first magnet 603 is fixed to the inner sidewall of each opening 602. The same poles of the first magnet 603 and the second magnet 604 are adjacent. The offset drive assembly 6 uses the principle of magnetic repulsion to make the grinding and stirring blade 505 move laterally and reciprocally, which not only expands the coverage area but also avoids dead corners, ensures full mixing of the entire tank, and reduces untreated areas. When the grinding and stirring blade 505 revolves and rotates around the rotating axis, when the second magnet 604 on the grinding and stirring blade 505 approaches the first magnet 603, the grinding and stirring blade 505 is pushed to slide away from the first magnet 603 along the cross limit protrusion 5031 through the principle of magnetic repulsion. When the second magnet 604 leaves the magnetic area, the first spring 504 pushes the grinding and stirring blade 505 to reset. This causes the grinding and stirring blade 505 to rotate and revolve laterally at the same time, so that the stirring trajectory covers the entire cross section of the tank, eliminating the edge retention defects of traditional stirring and further improving the uniformity of stirring. The residue prevention component 7 includes a scraper 701 symmetrically fixed to the side wall of the first rotating shaft 402 and a scraper 702 symmetrically fixed to the side wall of the second rotating shaft 403. Both scraper 701 and scraper 702 have grooves 703 on their side walls corresponding to the positions of the annular shell 601. The inner side walls of the grooves 703 are fitted to the outer side walls of the annular shell 601. A mounting groove 704 is provided at the bottom of the groove 703. A residue cleaning component 8 for cleaning the upper gear ring 501 is installed in each mounting groove 704. The residue cleaning components 8 on both sides are arranged rotationally symmetrically. Inclined guide channels 705 are provided on the side wall surfaces of both scraper 701 and scraper 702. The guide channels 705 cooperate with the residue cleaning components 8 to guide the cleaned residue back to the center of the tank. The lower surface of the scraper 702 is in contact with the upper surface of the fixed frame 4076, and the upper surface of the scraper 702 is in contact with the lower surface of the fixed frame 4076. The bottom end of the scraper 702 is set as an inclined surface 706. The bottom end of the inner wall of the mixing tank 1 is provided with a guide inclined surface 102. The inclined surface 706 is in contact with the guide inclined surface 102. While the rotating shaft rotates, it drives the scraper 701 and the scraper 702 to scrape off the residual material adhering to the inner side wall of the mixing tank 1, the outer side wall of the upper toothed ring 501, the upper and lower walls of the fixed frame 4076, and the outer side wall of the annular shell 601. The scraped residual material is guided back to the center. The scraper inclined surface 706 is seamlessly connected with the bottom guide inclined surface 102 of the tank to ensure that the bottom residual material is completely discharged, keep the equipment clean, extend the maintenance cycle, avoid cross-contamination of materials and waste of resources, and meet the GMP clean production requirements. The residual material cleaning assembly 8 includes a storage shell 801 fixed to the inner wall of the mounting groove 704. A limiting opening 802 is provided at the bottom end of the storage shell 801. A cleaning plate 804 is slidably connected to the inner wall of the limiting opening 802. A limiting block 805 is fixedly connected to the top end of the cleaning plate 804. A spring 806 is fixedly connected between the top end of the limiting block 805 and the upper inner wall of the storage shell 801. The cleaning plate 804 has a guide slope 8041 along the rotation direction of the adjacent gear 506. The bottom end of the cleaning plate 804 abuts against the top end of the upper gear ring 501. A guide slope 803 is fixedly connected to the bottom end of the storage shell 801. The guide slopes 803 are all located on adjacent guide slopes. On the front side of 803, the guide plate 803 is positioned corresponding to the guide channel 705. When the scraper rotates, it drives the residual cleaning component 8 to rotate. The elasticity of the spring 806 pushes the elastic cleaning plate 804 to adaptively fit the tooth groove of the upper tooth ring 501. As the elastic cleaning plate 804 revolves, it works with the guide slope 8041 to automatically scrape off the residual material in the tooth groove of the upper tooth ring 501. The scraped-off residue flows into the guide channel 705 through the guide plate 803 and finally flows back to the center of the tank to be introduced into the next batch of circulation, reducing material waste and avoiding material residue in the dead corner of the tooth groove, further improving cleaning quality and efficiency. The mixing tank 1 has a receiving cavity 101 inside its wall. A heating coil 14 is evenly wound inside the receiving cavity 101. A temperature sensor 12 is installed on the top of the cover 3, and the probe of the temperature sensor 12 is located inside the mixing tank 1. The outer wall of the mixing tank 1 is covered with a heat insulation sleeve 15. Several support legs 16 are installed at the bottom of the side wall of the heat insulation sleeve 15. A controller 13 is installed on the outer wall of the heat insulation sleeve 15. The controller 13 supports inverter connection and can dynamically adjust the speed according to the viscosity of the material, avoiding energy waste caused by using a large motor for a small load. The controller 13 is electrically connected to the heating coil 14 and the temperature sensor 12. The heating coil 14 is built into the tank wall receiving cavity 101. With the help of the heat insulation sleeve 15, the temperature control accuracy is ±℃ level. The temperature sensor 12 feeds back data to the controller 13 in real time to accurately maintain the temperature window required for the reaction. The heating power can be automatically adjusted according to the process stage. For example, if a three-stage temperature control is adopted (30℃→50℃→70℃), the heating rate of each stage is ≤5℃ / min to avoid local overheating of the material and causing boiling foam, which would affect the quality and appearance of the finished product. The top of the cap 3 is connected to the feed pipe 10 and the air inlet pipe 11, while the bottom of the mixing tank 1 is connected to the discharge pipe 9. Solenoid valves are installed in the feed pipe 10, air inlet pipe 11, and discharge pipe 9, and these valves are electrically connected to the controller 13. The controller 13 integrates a PLC+HMI system for automated coordination, automatically starting and stopping heating / cooling based on the temperature sensor 12 signal. The solenoid valves precisely control the flow rate and timing of the feed pipe 10, air inlet pipe 11, and discharge pipe 9, and monitor pressure changes to predict the reaction endpoint. During stirring, nitrogen is injected into the tank through the air inlet pipe 11. Combined with the sealed structure formed by the mixing tank 1 and the cap 3, this maintains a positive pressure of 5 kPa inside the tank, isolating oxygen and suppressing volatilization, further reducing the probability of foam generation during material stirring. Additionally, when discharging through the discharge pipe 9, the air inlet pipe 11, in conjunction with an external pressurization device, pressurizes the mixing tank 1, assisting in the discharge of viscous materials through the discharge pipe 9 and improving the smoothness of the discharge.

[0027] The working principle of this embodiment is as follows: When in use, the solenoid valve is opened by the controller 13 to inject the material into the mixing tank 1 through the feed pipe 10. The gas in the tank is vacuumed by the air inlet pipe 11, and then nitrogen is injected into the tank to isolate oxygen and suppress volatilization. Next, the motor 401 and heating coil 14 are started. The heating coil 14, together with the temperature sensor 12, realizes three-stage temperature control to avoid local overheating of the material and cause boiling foaming. The motor 401 drives the first rotating shaft 402 to rotate. Through the meshing transmission of the reversing mechanism 407, the second rotating shaft 403 is driven to rotate in the opposite direction, which in turn drives the two spiral stirring blades 404 to rotate, continuously conveying the material from the top and bottom of the tank to the middle mixing zone 406, forming a strong convection circulation. In the mixing zone 406, the rotating sawtooth dispersion disk 405 shears the material, making the material more finely dispersed and accelerating dissolution or reaction. Simultaneously, the rotating shaft drives the rotating rod 502 to revolve around the axis, driving the gear 506 to mesh along the upper gear ring 501, which in turn drives the rotating rod 502 to rotate. Through the cross-shaped limiting protrusion 5031 of the rotating rod 502 limiting the cross-shaped limiting groove 5051 of the crushing and stirring blade 505, the crushing and stirring blade 505 rotates. The crushing and stirring blade 505 achieves a composite motion of revolution and rotation. When the second magnet 604 on the crushing and stirring blade 505 approaches the first magnet 603, the principle of magnetic repulsion pushes the crushing and stirring blade 505 to slide away from the first magnet 603 along the cross-shaped limiting protrusion 5031. When the second magnet 604 leaves the magnetic area, the first spring 504 pushes the crushing and stirring blade 505 to reset. In this way, the crushing and stirring blade 505 rotates and revolves while moving laterally back and forth, performing multi-dimensional crushing of materials, so that the stirring trajectory covers the entire cross section of the tank, eliminating the edge retention defects of traditional stirring, and further improving the uniformity of stirring. While the rotating shaft rotates, it drives scraper 1 701 and scraper 2 702 to scrape off the residual material adhering to the inner wall of the mixing tank 1, the outer wall of the upper toothed ring 501, the upper and lower walls of the fixed frame 4076, and the outer wall of the annular shell 601. While the scraper rotates, it drives the residual material cleaning component 8 to rotate. The elasticity of spring 2 806 pushes the elastic cleaning plate 804 to adaptively fit the tooth groove of the upper toothed ring 501. As the elastic cleaning plate 804 revolves, it works with the guide inclined surface 8041 to automatically scrape off the residual material in the tooth groove of the upper toothed ring 501. The scraped-off residue flows into the guide channel 705 through the guide inclined plate 803 and finally flows back to the center of the tank, reducing material waste and further improving cleaning quality and efficiency. After processing, while opening the discharge pipe 9, the air inlet pipe 11, in conjunction with the external pressurization equipment, pressurizes the mixing tank 1 to assist the viscous material in being discharged from the discharge pipe 9, thereby improving the smoothness of the discharge. This device systematically solves the industry pain points in the production of nonionic surfactants, such as poor mixing uniformity, easy precipitation and agglomeration, difficult cleaning, and unstable temperature control.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A stirring apparatus for the production of nonionic surfactants, comprising a stirring tank (1), characterized in that: The top of the mixing tank (1) is sealed with a cap (3), and the interior of the mixing tank (1) is equipped with a multi-dimensional mixing device (2) that integrates anti-sedimentation, crushing, mixing and anti-residue functions. The multidimensional mixing and stirring device (2) includes a bidirectional anti-settling stirring component (4) for convective mixing and shearing of raw materials. Several rotating stirring and pulverizing components (5) and offset driving components (6) are arranged vertically at equal intervals around the bidirectional anti-settling stirring component (4) and the inner wall of the mixing tank (1). The rotating stirring and pulverizing components (5) are driven by the bidirectional anti-settling stirring component (4). The offset driving components (6) drive the rotating stirring and pulverizing components (5) to move laterally back and forth. The side wall of the bidirectional anti-settling stirring component (4) is equipped with an anti-residue component (7) for scraping the residue on the inner wall of the mixing tank (1).

2. The stirring device for producing nonionic surfactants according to claim 1, characterized in that, The bidirectional anti-sedimentation stirring assembly (4) includes a motor (401) fixedly installed on the top of the cover (3), a first rotating shaft (402) and a second rotating shaft (403) arranged along the same vertical axis. The output end of the motor (401) is fixedly connected to the top of the first rotating shaft (402). The outer walls of the first rotating shaft (402) and the second rotating shaft (403) are both fixedly connected with spiral stirring blades (404) and serrated dispersion disks (405). A reversing mechanism (407) for self-driving the second rotating shaft (403) to rotate in the opposite direction is provided between the first rotating shaft (402) and the second rotating shaft (403). The area between the first rotating shaft (402) and the second rotating shaft (403) is set as a mixing zone (406). The serrated dispersion disks (405) are all located in the mixing zone (406).

3. A stirring device for the production of nonionic surfactants according to claim 2, characterized in that, The reversing mechanism (407) includes a fixed frame (4076) fixed to the inner wall of the mixing tank (1), a bevel gear one (4072) fixed to the bottom of the rotating shaft one (402), and a bevel gear two (4073) fixed to the top of the rotating shaft two (403). A fixed shell (4071) is fixedly connected to the inner wall of the center of the fixed frame (4076). The bevel gear one (4072) and the bevel gear two (4073) are both located inside the fixed shell (4071). The inner wall of the fixed shell (4071) is rotatably connected to the bevel gear three (4075) through the rotating shaft (4074). The bevel gear three (4075) meshes with the bevel gear one (4072) and the bevel gear two (4073).

4. A stirring device for the production of nonionic surfactants according to claim 1, characterized in that, The self-rotating stirring and pulverizing assembly (5) includes an upper gear ring (501) fixed to the inner wall of the stirring tank (1), rotating rods (502) symmetrically rotatably connected to the side walls of rotating shaft one (402) and rotating shaft two (403), and symmetrically arranged pulverizing and stirring blades (505). The rotating rods (502) are all located above the upper gear ring (501). A gear (506) is fixedly connected to one end of the rotating rod (502) near the upper gear ring (501). The bottom of the gears (506) meshes with the top of the upper gear ring (501). The rotating rods (502) are close to the spiral... A baffle plate (503) is fixedly fitted onto the outer wall of the stirring blade (404). A cross-shaped limiting protrusion (5031) is provided on the outer wall of the middle end of the rotating rod (502). A cross-shaped limiting groove (5051) is provided on the rotation axis of the crushing stirring blade (505). The inner wall of the cross-shaped limiting groove (5051) is slidably connected to the outer wall of the cross-shaped limiting protrusion (5031). A spring (504) is fixedly connected between the baffle plate (503) and the crushing stirring blade (505) on the same side. The crushing stirring blade (505) does not contact the upper gear ring (501).

5. A stirring device for the production of nonionic surfactants according to claim 1, characterized in that, The offset drive assembly (6) includes an annular housing (601) fixed to the inner wall of the mixing tank (1) and a second magnet (604) fixed to the side of the crushing and stirring blade (505) near the upper gear ring (501). The annular housing (601) is located above the gear (506). The inner annular sidewall of the annular housing (601) is provided with several openings (602) at equal intervals along the circumference. The inner sidewall of each opening (602) is fixed with a first magnet (603). The first magnet (603) and the second magnet (604) are adjacent to each other with the same pole.

6. A stirring device for the production of nonionic surfactants according to claim 1, characterized in that, The residue prevention component (7) includes a scraper first (701) symmetrically fixed to the side wall of the first rotating shaft (402) and a scraper second (702) symmetrically fixed to the side wall of the second rotating shaft (403). The side walls of the scraper first (701) and the scraper second (702) are provided with grooves (703) corresponding to the position of the annular shell (601). The inner side walls of the grooves (703) are in contact with the outer side walls of the annular shell (601). The bottom end of the grooves (703) is provided with a mounting groove (704). The mounting grooves (704) are each equipped with a residue cleaning component (8) for cleaning the upper gear ring (501). The residue cleaning components (8) on both sides are arranged in a spiral shape. The scraper frame 1 (701) and scraper frame 2 (702) are symmetrically arranged with inclined guide grooves (705) on their side wall surfaces. The guide grooves (705) cooperate with the residual cleaning component (8) to guide the cleaning residue back to the center of the tank. The lower surface of scraper frame 1 (701) is in contact with the upper surface of the fixed frame (4076), and the upper surface of scraper frame 2 (702) is in contact with the lower surface of the fixed frame (4076). The bottom end of scraper frame 2 (702) is set as an inclined surface (706). The bottom end of the inner wall of the mixing tank (1) is provided with a guide inclined surface (102), and the inclined surface (706) is in contact with the guide inclined surface (102).

7. A stirring device for the production of nonionic surfactants according to claim 6, characterized in that, The residue cleaning assembly (8) includes a storage shell (801) fixed to the inner wall of the mounting groove (704). A limiting port (802) is provided at the bottom end of the storage shell (801). A cleaning plate (804) is slidably connected to the inner wall of the limiting port (802). A limiting block (805) is fixedly connected to the top end of the cleaning plate (804). A spring (805) is fixedly connected between the top end of the limiting block (805) and the upper inner wall of the storage shell (801). 06), the cleaning plate (804) is provided with a guide slope (8041) along the rotation direction of the adjacent gear (506), the bottom end of the cleaning plate (804) abuts against the top end of the upper gear ring (501), the bottom end of the storage shell (801) is fixedly connected with a guide slope (803), the guide slope (803) is located on the front side of the adjacent guide slope (803), and the guide slope (803) is corresponding to the position of the guide groove (705).

8. A stirring device for the production of nonionic surfactants according to claim 1, characterized in that: The mixing tank (1) has a receiving cavity (101) inside its wall. A heating coil (14) is evenly wound inside the receiving cavity (101). A temperature sensor (12) is installed on the top of the cover (3). The probe of the temperature sensor (12) is located inside the mixing tank (1). The outer wall of the mixing tank (1) is covered with a heat insulation sleeve (15). Several support legs (16) are installed at the bottom of the side wall of the heat insulation sleeve (15). A controller (13) is installed on the outer wall of the heat insulation sleeve (15). The controller (13) is electrically connected to the heating coil (14) and the temperature sensor (12).

9. A stirring device for the production of nonionic surfactants according to claim 1, characterized in that: The top of the cover (3) is connected to the feed pipe (10) and the air inlet pipe (11), and the bottom of the mixing tank (1) is connected to the discharge pipe (9). Solenoid valves are installed in the feed pipe (10), the air inlet pipe (11), and the discharge pipe (9), and the solenoid valves are electrically connected to the controller (13).

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