A reaction apparatus for the production of nano-silica

Abstract

This utility model relates to the field of nano-silica processing technology, and discloses a reaction device for the production of nano-silica, including a hot reaction vessel. Two scrapers are slidably connected to the inner side of the hot reaction vessel, and a connecting rod is fixedly connected to the top of each scraper. A gear is fixedly connected to the top of each connecting rod. A shell is fixedly connected to the outer side of the hot reaction vessel, and a motor is mounted on the top of the shell. A gear is fixedly connected to the drive end of the motor, and the outer side of the gear is meshed with the outer side of the gear. A multi-angle spray assembly and an automatic control feeding assembly are fixedly connected to the top of the hot reaction vessel. In this utility model, the rotating scrapers remove nano-silica particles adhering to the inner wall of the hot reaction vessel in real time, avoiding residue accumulation that affects heat transfer efficiency and product purity, and extending the continuous operation time of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of nano-silica processing technology, and in particular to a reaction device for the production of nano-silica. Background Technology

[0002] A reaction device for producing nano-silica employs a spray pyrolysis method, mainly consisting of an atomizing component, a high-temperature reactor, and a collection component. The precursor solution is atomized into tiny droplets through an atomizer and rapidly pyrolyzed in the high-temperature reactor to generate nano-silica particles. The product is then collected through a separation and filtration device. This device enables continuous production, and the particle size and morphology can be optimized by controlling the reaction conditions. It is suitable for various silicon source precursors and has high production efficiency and product purity.

[0003] A reaction apparatus for producing nano-silica mainly consists of an atomizer, a high-temperature reactor, a gas-solid separator, and a collection component. The atomizer atomizes the precursor solution into fine droplets, which are then fed into the tubular reactor for high-temperature pyrolysis into nano-silica particles. The reactor is heated by electricity or gas to provide a uniform high-temperature environment. The gas-solid separator separates the product from the exhaust gas. The nano-silica particles are finally collected by a bag filter or an electrostatic collector. The apparatus is equipped with a temperature controller and an airflow regulating device to ensure a stable and controllable reaction.

[0004] Existing reactors for producing nano-silica are prone to depositing nano-silica particles on the inner wall of the reactor during spray pyrolysis. This is mainly due to the melting and adhesion of particles at high temperatures, as well as localized accumulation caused by airflow vortices. The residue reduces heat transfer efficiency, affects temperature uniformity, and can detach and contaminate the product. Traditional structures are difficult to self-clean, requiring frequent shutdowns for manual cleaning, which reduces production efficiency and can easily damage the refractory layer of the furnace wall, increasing maintenance costs. Therefore, a reactor for producing nano-silica is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a reaction device for the production of nano-silica, which aims to improve the problem of nano-silica deposition residue on the inner wall of the reactor during spray pyrolysis reaction in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A reaction apparatus for producing nano-silica includes a thermal reaction vessel. Two scrapers are slidably connected to the inner side of the thermal reaction vessel. A connecting rod is fixedly connected to the top of each scraper. A gear is fixedly connected to the top of the connecting rod. A shell is fixedly connected to the outer side of the thermal reaction vessel. A motor is installed at the top of the shell. A gear is fixedly connected to the drive end of the motor. The outer side of the gear is meshed with the outer side of the gear. A multi-angle spraying assembly is fixedly connected to the top of the thermal reaction vessel. An automatic control feeding assembly is fixedly connected to the top of the thermal reaction vessel.

[0008] As a further description of the above technical solution:

[0009] The multi-angle spraying assembly includes a can lid, the bottom of which is fixedly connected to the top of the thermal reaction vessel. Two fixing rods are fixedly connected to the inner side of the can lid. A motor is installed at the bottom of each fixing rod. A turntable is fixedly connected to the drive end of the motor. A fixing rod is fixedly connected to the front end of the turntable. A rocker arm is slidably connected to the outer side of the fixing rod. A fixing clamp is fixedly connected to the bottom end of the rocker arm.

[0010] As a further description of the above technical solution:

[0011] The automatic control feeding assembly includes a discharge port. The top end of the discharge port is fixedly connected to the bottom end of the hot reaction vessel. A discharge plate is slidably connected to the bottom end of the discharge port. A second fixing plate is fixedly connected to the rear end of the discharge plate. A first connecting rod is rotatably connected to the outer side of the second fixing plate. A cylinder is rotatably connected to the outer side of the first connecting rod. The top end of the cylinder is fixedly connected to the first fixing plate. A rear plate is fixedly connected to the rear end of the first fixing plate.

[0012] As a further description of the above technical solution:

[0013] The outer side of the can lid is fixedly connected to the top of the outer shell, and the inner side of the outer shell is rotatably connected to the outer side of the second gear.

[0014] As a further description of the above technical solution:

[0015] The inner side of the can lid is rotatably connected to a gear, and the bottom end of the gear is slidably connected to the top of the hot reaction vessel.

[0016] As a further description of the above technical solution:

[0017] A water inlet pipe is fixedly connected to the inside of the tank lid, and a liquid outlet pipe is fixedly connected to the bottom end of the water inlet pipe.

[0018] As a further description of the above technical solution:

[0019] A liquid outlet pipe is fixedly connected to the inner side of the fixed clamping ring, and multiple atomizing nozzles are fixedly connected to the bottom end of the liquid outlet pipe.

[0020] As a further description of the above technical solution:

[0021] A connecting rod three is rotatably connected to the outer side of the fixed plate two, and a connecting rod two is rotatably connected to the outer side of the connecting rod three. The rear end of the connecting rod two is rotatably connected to the front end of the rear plate.

[0022] As a further description of the above technical solution:

[0023] An auxiliary rod is fixedly and rotatably connected to the rear end of the feeding plate, and the rear end of the auxiliary rod is rotatably connected to the front end of the rear plate.

[0024] As a further description of the above technical solution:

[0025] The bottom of the rear plate is fixedly connected to a base, and the top of the base is fixedly connected to two pillars. The inner sides of the two pillars are fixedly connected to the outside of the thermal reaction vessel.

[0026] This utility model has the following beneficial effects:

[0027] 1. In this utility model, motor one drives gear two, gear two drives gear one, gear one drives connecting rod, and connecting rod drives scraper. The scraper rotates to remove nano-silica particles attached to the inner wall of the hot reaction tank in real time, avoiding the accumulation of residues that affect heat transfer efficiency and product purity, reducing the frequency of manual cleaning, extending the continuous operation time of the equipment, and protecting the inner wall refractory layer from damage.

[0028] 2. In this utility model, the turntable is driven by motor 2, the turntable drives fixed rod 2, fixed rod 2 drives rocking rod, rocking rod drives fixed clamping ring, fixed clamping ring drives liquid outlet pipe, and the rocking rack mechanism driven by motor makes the atomizing nozzle swing in multiple directions, ensuring that the precursor solution is evenly dispersed into the high-temperature reaction zone, significantly improving pyrolysis efficiency, reducing local overheating or unreacted droplets, thereby improving the uniformity of nanoparticle size and product yield.

[0029] 3. In this utility model, the cylinder drives connecting rod one, connecting rod one drives connecting rod three, connecting rod three drives connecting rod two, connecting rod one drives fixed plate two, and fixed plate two drives the feeding plate. The cylinder linkage lever assembly precisely controls the opening and closing of the discharge port, realizing rapid switching of feeding, avoiding the problem of easy clogging of traditional valves, ensuring smooth feeding and good sealing, and reducing the intensity of manual operation. Attached Figure Description

[0030] Figure 1 This is a three-dimensional schematic diagram of a reaction apparatus for producing nano-silica according to the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the tank lid of a reaction device for producing nano-silica according to the present invention;

[0032] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0033] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0034] Figure 5 This is a schematic diagram of the rear plate of a reaction device for producing nano-silica, as proposed in this utility model.

[0035] Legend:

[0036] 1. Hot reaction vessel; 2. Discharge port; 3. Base; 4. Support column; 5. Rear plate; 6. Tank cover; 7. Motor 1; 8. Outer shell; 9. Connecting rod; 10. Scraper; 11. Gear 1; 12. Liquid outlet pipe; 13. Atomizing nozzle; 14. Discharge plate; 15. Gear 2; 16. Connecting rod 3; 17. Water inlet pipe; 18. Fixing rod 1; 19. Motor 2; 20. Turntable; 21. Fixing clamp; 22. Rocking rod; 23. Connecting rod 2; 24. Fixing rod 2; 25. Fixing plate 1; 26. Cylinder; 27. Connecting rod 1; 28. Auxiliary rod; 29. ​​Fixing plate 2. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Reference Figures 1 to 3This utility model provides an embodiment of a reaction device for the production of nano-silica, including a thermal reaction vessel 1, which serves as the core reaction container to withstand the drastic temperature changes during the high-temperature pyrolysis process, ensuring the stability of the nano-silica synthesis reaction. Two scrapers 10 are slidably connected to the inner side of the thermal reaction vessel 1. The two scrapers 10 are made of high-temperature resistant material to be suitable for the high temperature of the atomized solution pyrolysis inside the thermal reaction vessel 1. The surface of the scrapers 10 is smooth and wear-resistant, which can effectively scrape off the nano-silica particles adsorbed on the inner wall of the thermal reaction vessel 1, preventing particle deposition from affecting the heat transfer efficiency and product quality. A connecting rod 9 is fixedly connected to the top of each of the two scrapers 10, and a gear 11 is fixedly connected to the top of the connecting rod 9. The connecting rod 9 can stably transmit the rotational power of the gear 11, ensuring the stable scraping of the scrapers 10 on the inner wall of the thermal reaction vessel 1.

[0039] The outer shell 8 is fixedly connected to the outside of the hot reaction vessel 1. The shell 8 is filled with heat insulation material, which can effectively reduce the heat loss inside the hot reaction vessel 1, improve energy utilization efficiency, and reduce the surface temperature of the equipment to ensure the safety of the operators. A motor 7 is installed at the top of the shell 8. The motor 7 can precisely control the speed according to production needs to provide stable power for the rotation of the scraper 10. A gear 15 is fixedly connected to the drive end of the motor 7. The module and pressure angle of the gear 15 are matched with those of the gear 11. Through precise tooth design, efficient power transmission is achieved to ensure that the scraper 10 can scrape the deposits on the inner wall of the hot reaction vessel 1 at an appropriate speed.

[0040] The top of the hot reaction vessel 1 is fixedly connected to a multi-angle spraying assembly. The multi-angle spraying assembly enables the reaction solution to be sprayed evenly into the hot reaction vessel 1 in an atomized form, increasing the contact area between the solution and the hot air, promoting the full progress of the pyrolysis reaction, and improving the production efficiency and quality of nano-silica. The top of the hot reaction vessel 1 is also fixedly connected to an automatic control feeding assembly. The automatic control feeding assembly can accurately control the amount and speed of raw material feeding, realize the automated control of the production process, and ensure the stability and consistency of product quality.

[0041] Reference Figure 2 , Figure 4 The multi-angle spraying assembly includes a can lid 6. This design provides a stable mounting base for the internal components of the assembly, ensuring the orderly conduct of subsequent spraying operations. The bottom end of the can lid 6 is fixedly connected to the top of the thermal reaction vessel 1, forming a relatively enclosed space between the can lid 6 and the thermal reaction vessel 1, providing a suitable environment for solution pyrolysis. Two fixing rods 18 are fixedly connected to the inner side of the can lid 6, which can stably support the motor 19 and ensure that it will not easily shake during operation. The bottom ends of the two fixing rods 18 are each equipped with a motor 19. The motor 19 serves as a power source, providing continuous and stable driving force for the movement of subsequent components.

[0042] A turntable 20 is fixedly connected to the drive end of motor 219. Motor 219 drives turntable 20 to rotate, which is the initial power transmission link to realize subsequent swinging spray. A fixed rod 24 is fixedly connected to the front end of turntable 20. The rotation of turntable 20 drives fixed rod 24 to rotate synchronously, providing power support for the movement of swing rod 22. A swing rod 22 is slidably connected to the outside of fixed rod 24. When fixed rod 24 rotates, the sliding of swing rod 22 can convert the rotation into a swinging motion, creating conditions for multi-angle spraying of liquid outlet pipe 12. A fixed clamping ring 21 is fixedly connected to the bottom end of swing rod 22. The swinging of swing rod 22 can directly drive fixed clamping ring 21 to move synchronously, ensuring that liquid outlet pipe 12 swings stably with it.

[0043] The outer side of the can lid 6 is fixedly connected to the top of the outer shell 8. The outer shell 8 can provide a certain degree of protection for the can lid 6 and internal components, reducing the interference of external factors on the spraying operation. The inner side of the outer shell 8 is rotatably connected to the outer side of the gear 15. This connection method can ensure that the gear 15 rotates flexibly, providing a guarantee for the coordinated operation of related components. The inner side of the can lid 6 is rotatably connected to the gear 11. The bottom end of the gear 11 is slidably connected to the top of the hot reaction vessel 1, making the gear 11 slide more smoothly at the top of the hot reaction vessel 1.

[0044] The inside of the can lid 6 is fixedly connected to a water inlet pipe 17, which can stably deliver the atomized solution to the outlet pipe 12, ensuring an uninterrupted solution supply. The bottom end of the water inlet pipe 17 is fixedly connected to the outlet pipe 12, enabling smooth flow of the solution from the water inlet pipe 17 to the outlet pipe 12, preparing for subsequent spraying. The inside of the fixing clamp 21 is fixedly connected to the outlet pipe 12, which can firmly fix the outlet pipe 12, ensuring stable spraying during swaying. The bottom end of the outlet pipe 12 is fixedly connected to multiple atomizing nozzles 13, which can atomize the solution and spray it out at multiple angles, allowing the solution to fully contact the heat in the thermal reaction tank 1, promoting uniform pyrolysis.

[0045] Reference Figure 1 , Figure 5The automatic control feeding component includes a discharge port 2. The top of the discharge port 2 is fixedly connected to the bottom of the hot reaction tank 1. The discharge port 2 has a conical structure with a smooth inner wall, which facilitates the smooth discharge of nano-silica particles and reduces the accumulation and blockage of materials at the discharge port 2. The bottom of the discharge port 2 is slidably connected to a feeding plate 14. The feeding plate 14 is a rectangular metal plate with a polished surface. It fits tightly with the contact surface of the discharge port 2, which can effectively achieve the sealing and opening control of the discharge port 2. The rear end of the feeding plate 14 is fixedly connected to a fixing plate 29. The outer side of the fixing plate 29 is rotatably connected to a connecting rod 27. The fixing plate 29 provides a connection fulcrum for the connecting rod 27, ensuring that the connecting rod mechanism can stably drive the feeding plate 14 to move. The outer side of the connecting rod 27 is rotatably connected to a cylinder 26. The connecting rod 27 is a metal rod with rotating joints at both ends, which can rotate flexibly between the fixing plate 29 and the cylinder 26 to transmit the driving force of the cylinder 26.

[0046] Cylinder 26 is a pneumatic actuator that uses high-precision pneumatic control technology to precisely control the extension and retraction length and speed of the piston rod, providing stable and reliable power for the movement of the feeding plate 14. A fixing plate 25 is fixedly connected to the top of cylinder 26. The fixing plate 25 is a flat plate structure that provides a stable mounting base for cylinder 26, ensuring that cylinder 26 will not shift during operation. A rear plate 5 is fixedly connected to the rear end of fixing plate 25. A base 3 is fixedly connected to the bottom of the rear plate 5. The base 3 is a box-type structure and can be equipped with counterweights to increase the stability of the equipment and prevent the equipment from shaking during operation.

[0047] Two support columns 4 are fixedly connected to the top of the base 3. The support columns 4 have good compressive strength and provide stable support for the hot reaction tank 1, ensuring that the hot reaction tank 1 remains stable during operation. The rear plate 5 is a rectangular metal plate, which serves as the support structure for the entire automatic control feeding assembly. Together with the base 3 and the support columns 4, it forms a stable frame system. The inner sides of the two support columns 4 are fixedly connected to the outer side of the hot reaction tank 1. The hot reaction tank 1 is firmly fixed to the support columns 4 by welding or bolting, which enhances the overall stability of the equipment. The outer side of the fixed plate 29 is rotatably connected to the connecting rod 3 16. The outer side of the connecting rod 3 16 is rotatably connected to the connecting rod 23. The connecting rod 3 16 is a metal rod with rotating joints at both ends. Together with the connecting rod 1 27 and the connecting rod 23, it forms a linkage mechanism to realize the complex movement trajectory of the feeding plate 14.

[0048] The rear end of the second connecting rod 23 is rotatably connected to the front end of the rear plate 5, serving as a fixed fulcrum for the connecting rod mechanism to ensure that the connecting rod mechanism can work according to the predetermined motion trajectory. The rear end of the feeding plate 14 is fixedly and rotatably connected to an auxiliary rod 28, which is a metal rod. Its rear end is rotatably connected to the front end of the rear plate 5 and works in coordination with the connecting rod mechanism to provide auxiliary support and guidance for the movement of the feeding plate 14, ensuring that the feeding plate 14 remains stable during the sliding process.

[0049] Working principle: When using the reaction device for producing nano-silica, the solution through the outlet pipe 12 is sprayed out from the atomizing nozzle 13 during the production process. Then, it is pyrolyzed at high temperature inside the hot reaction tank 1 to generate nano-silica particles. These particles are easily adsorbed on the inner wall of the hot reaction tank 1 and leave residues, which also have some impact. To address this, the motor 7 installed at the top of the outer shell 8 can be opened to drive the gear 15 to rotate. The outer side of the gear 15 meshes with the outer side of the gear 11, causing the gear 11 to rotate inside the tank cover 6. The two connecting rods 9 fixedly connected to the bottom of the gear 11 rotate together. The scraper 10 fixedly connected to the connecting rods 9 rotates and scrapes the inner wall of the hot reaction tank 1 to prevent residues from depositing on the inner wall of the hot reaction tank 1 and affecting performance.

[0050] To ensure that the atomized solution sprayed during the production process is evenly pyrolyzed and dispersed in all directions, two internally fixed motors 19 drive the turntable 20 to rotate. The turntable 20 is rotated by the fixed rod 24 at its front end, causing the rocking rod 22 to slide on the outside of the fixed rod 24 and rock back and forth. This causes the liquid outlet pipe 12, which is fixed by the bottom clamping ring 21, to rock and spray evenly in all directions, so that the solution is fully and evenly pyrolyzed during the heating process to generate nano-silica particles.

[0051] After the nano-silica particles are produced, the feeding of the raw materials is controlled by the automatic feeding component at the bottom of the device. When needed, simply open the cylinder 26, which pushes the connecting rod 27 to one side. At this time, the connection between the connecting rod 27 and the connecting rod 16 causes the connecting rod 23 to rotate. The connecting rod 16 and the connecting rod 27 work together to move the fixing plate 29 downward and to the side where the connecting rod 27 is pushed, thereby canceling the seal on the bottom of the discharge port 2 and releasing the produced raw materials. When feeding is stopped, simply retract the cylinder 26.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reaction apparatus for producing nano-silica, comprising a heated reaction vessel (1), characterized in that: The inner side of the hot reaction tank (1) is slidably connected to two scrapers (10), and the top of each scraper (10) is fixedly connected to a connecting rod (9). The top of the connecting rod (9) is fixedly connected to a gear (11). The outer side of the hot reaction tank (1) is fixedly connected to a shell (8). The top of the shell (8) is equipped with a motor (7). The drive end of the motor (7) is fixedly connected to a gear (15). The outer side of the gear (15) is meshed with the outer side of the gear (11). The top of the hot reaction tank (1) is fixedly connected to a multi-angle spray assembly. The top of the hot reaction tank (1) is fixedly connected to an automatic control feeding assembly.

2. The reaction device for producing nano-silicon dioxide according to claim 1, characterized in that: The multi-angle spray assembly includes a can lid (6), the bottom end of which is fixedly connected to the top of the hot reaction vessel (1). Two fixing rods (18) are fixedly connected to the inner side of the can lid (6). Motors (19) are installed at the bottom ends of the two fixing rods (18). A turntable (20) is fixedly connected to the drive end of the motor (19). A fixing rod (24) is fixedly connected to the front end of the turntable (20). A rocker arm (22) is slidably connected to the outer side of the fixing rod (24). A fixing clamp (21) is fixedly connected to the bottom end of the rocker arm (22).

3. The reaction device for producing nano-silicon dioxide according to claim 1, characterized in that: The automatic control feeding assembly includes a discharge port (2), the top of which is fixedly connected to the bottom of the hot reaction tank (1), a discharge plate (14) is slidably connected to the bottom of the discharge port (2), a second fixing plate (29) is fixedly connected to the rear end of the discharge plate (14), a first connecting rod (27) is rotatably connected to the outer side of the second fixing plate (29), a cylinder (26) is rotatably connected to the outer side of the first connecting rod (27), a first fixing plate (25) is fixedly connected to the top of the cylinder (26), and a rear plate (5) is fixedly connected to the rear end of the first fixing plate (25).

4. The reaction device for producing nano-silicon dioxide according to claim 2, characterized in that: The outer side of the can lid (6) is fixedly connected to the top of the outer shell (8), and the inner side of the outer shell (8) is rotatably connected to the outer side of the gear two (15).

5. The reaction device for producing nano-silicon dioxide according to claim 2, characterized in that: The inner side of the can lid (6) is rotatably connected to a gear (11), and the bottom end of the gear (11) is slidably connected to the top of the hot reaction vessel (1).

6. The reaction device for producing nano-silicon dioxide according to claim 2, characterized in that: The inside of the can lid (6) is fixedly connected to a water inlet pipe (17), and the bottom end of the water inlet pipe (17) is fixedly connected to a liquid outlet pipe (12).

7. The reaction device for producing nano-silicon dioxide according to claim 2, characterized in that: The inner side of the fixed clamp (21) is fixedly connected to the liquid outlet pipe (12), and the bottom end of the liquid outlet pipe (12) is fixedly connected to multiple atomizing nozzles (13). 8.The reaction device for nano-silica production of claim 3, characterized in that: The outer side of the fixed plate 2 (29) is rotatably connected to the connecting rod 3 (16), the outer side of the connecting rod 3 (16) is rotatably connected to the connecting rod 2 (23), and the rear end of the connecting rod 2 (23) is rotatably connected to the front end of the rear plate (5). 9.The reaction device for nano-silica production of claim 3, characterized in that: An auxiliary rod (28) is fixedly and rotatably connected to the rear end of the feeding plate (14), and the rear end of the auxiliary rod (28) is rotatably connected to the front end of the rear plate (5). 10.The reaction device for nano-silica production of claim 3, characterized in that: The bottom end of the rear plate (5) is fixedly connected to a base (3), and the top end of the base (3) is fixedly connected to two pillars (4). The inner sides of the two pillars (4) are fixedly connected to the outer side of the hot reaction vessel (1).

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