A high-activity nano zinc oxide preparation device and preparation method

Abstract

The present invention belongs to the technical field of zinc oxide preparation, and specifically relates to a high-activity nano zinc oxide preparation device and preparation method, comprising a tank body, an output port is installed at the bottom end of the tank body, a storage box is fixed at the top end of the tank body, a feed port is opened at one side of the top end of the tank body, a first motor is installed at one side of the top end of the storage box, a gear disc is rotatably connected to the top end of the storage box, a gear is fixed at the end of the rotating shaft of the first motor, the gear is meshed and connected with the gear disc, a telescopic hole is opened in the middle of the gear disc, a lifting rod is inserted inside the telescopic hole, a rotating frame is fixed at the bottom end of the lifting rod, a stirring rod is arranged below the rotating frame, and a vacuum pump is arranged inside the rotating frame; the stirring rod is driven by the first motor to rotate inside the tank body to stir the solution inside the tank body, and at the same time, the vacuum pump inputs high-temperature gas into the stirring rod, and the high-temperature gas ejected from the air outlet can heat the solution during the stirring process, so as to achieve more uniform mixing of the solution.

Description

Technical Field

[0001] The invention belongs to the technical field of zinc oxide preparation, in particular to a device and method for preparing high-activity nano zinc oxide. Background Art

[0002] Highly active nano zinc oxide is a multi-purpose material with a particle size between 1-100nm. It has extremely high chemical activity and excellent catalytic and photocatalytic activity. It also has resistance to infrared and ultraviolet radiation and sterilization functions. It can be used to manufacture gas sensors, varistors, ultraviolet shielding materials, etc.

[0003] A patent application with the existing publication number CN115672460A discloses a device for preparing high-activity nano zinc oxide. The device for preparing high-activity nano zinc oxide includes a main body, an inner surface of the main body is fixedly connected to a partition, the left inner surface of the main body and the left side surface of the partition are fixedly connected to a fixing plate, an upper surface of the fixing plate is fixedly connected to an ultrasonic generator, an output end of the ultrasonic generator is fixedly connected to a transducer, and an output end of the transducer is fixedly connected to a support plate. The conveyor belt cooperates with a baffle to effectively and continuously transport zinc oxide that does not meet the specifications to a crushing roller for crushing, which is beneficial to improving the efficiency of preparing high-activity nano zinc oxide.

[0004] During use of the above technical solution, the raw materials need to be crushed to prepare zinc oxide. After crushing, the solid raw materials need to be mixed with the liquid raw materials for reaction. During the mixing process, they need to be heated. External heating will cause the solution close to the outside to be heated in advance, and the internal solution will be heated at a slower speed, which will cause uneven heating of the solution and affect the effect of the raw material mixing reaction.

[0005] To this end, the present invention provides a device and method for preparing high-activity nano zinc oxide. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a high-activity nano zinc oxide preparation device described in the present invention comprises a tank body, an output port is installed at the bottom end of the tank body, a storage box is fixed at the top end of the tank body, a feed port is opened on one side of the top end of the tank body, a first motor is installed on one side of the top end of the storage box, a gear disc is rotatably connected to the top end of the storage box, a gear is fixed to the end of the rotating shaft of the first motor, the gear is meshed and connected with the gear disc, a telescopic hole is opened in the middle of the gear disc, a lifting rod is inserted into the inside of the telescopic hole, a rotating frame is fixed to the bottom end of the lifting rod, a stirring rod is arranged below the rotating frame, a vacuum pump is arranged inside the rotating frame, an air guide cylinder is fixed to the air outlet end of the vacuum pump, a heating wire is arranged inside the air guide cylinder, a sleeve is fixed to the outside of the bottom end of the air guide cylinder, the sleeve is connected to the stirring rod, and two groups of air outlet holes are opened at equal intervals on the outside of the stirring rod.

[0008] Preferably, three support frames are fixed at equal intervals below the rotating frame, the air guide cylinder is fixed at the top of the support frame, the top of the stirring rod is slidably connected to the inside of the support frame, guide grooves are opened on both sides of the support frame, and a bidirectional screw rod is rotatably connected inside the guide groove, and sliders are fixed on both sides of the top of the stirring rod, the sliders are slidably connected to the inside of the guide groove, and the sliders are threadedly connected to the bidirectional screw rod.

[0009] Preferably, a pulley is fixed to one end of the bidirectional screw near the stirring rod, a transmission gear is arranged between the two pulleys, the transmission gear is rotatably connected to the side of the rotating frame, a double-groove pulley is fixed to the side of the transmission gear near the pulley, the double-groove pulley is connected to the two pulleys through a belt, a gear ring is fixed to the middle part of the inside of the tank body, and three transmission gears can be meshed and connected with the gear ring.

[0010] Preferably, a fixed head is fixed to the top of the stirring rod, a telescopic cylinder is fixed to a side of the fixed head close to the water collecting tank, and the telescopic cylinder is inserted into the interior of the water collecting tank.

[0011] Preferably, a rotating column is rotatably connected to the interior of the fixed head, a first sliding cavity is opened on one side of the interior of the fixed head, a second sliding cavity is opened on one side of the first sliding cavity, a rotating plate is fixed on one side of the rotating column, the rotating plate is slidably connected to the interior of the first sliding cavity, an air inlet hole is opened on the outer side of the rotating column, the air inlet hole is opened on the side of the rotating plate close to the second sliding cavity, the bottom end of the rotating column is fixedly connected to the top end of the air guide column, the air inlet hole is communicated with the interior of the air guide column, air guide holes are opened on both sides of the air guide column, the bottom end of the air guide column is rotatably connected to the stirring rod through a rotating block, a coil spring is fixed to the outside of the rotating block, and the bottom end of the coil spring is fixedly connected to the stirring rod.

[0012] Preferably, a tooth groove is provided on one side of the lifting rod, a second motor is installed on the top end of the toothed disc, an output gear is fixed to the end of the rotating shaft of the second motor, and the output gear is meshingly connected with the tooth groove.

[0013] Preferably, an air intake hood is fixed to the air intake end of the vacuum pump, water filter cotton is arranged inside the air intake hood, a water collecting tank is fixed to the bottom end of the air intake hood, and a water outlet pipe is fixed to the bottom end of the water collecting tank.

[0014] Preferably, a connecting head is fixed on one side of the water outlet pipe, a sealing ball is provided on one side inside the connecting head, one side of the sealing ball extends to the outside of the connecting head, a spring is fixed on one side inside the connecting head, the other side of the spring is fixedly connected to the sealing ball, a guide tube is fixed on one side inside the storage box, and a top block is fixed on one end of the guide tube placed inside the storage box.

[0015] A method for preparing highly active nano zinc oxide comprises the following steps: Raw material pretreatment: Use ultrasonic grinding to grind urea to 400-500 mesh, dissolve zinc nitrate, urea and sodium hydroxide in a mixed solvent of isopropanol at a ratio of 1:2, and add a surfactant.

[0016] ‌Mixing and reaction: The zinc salt solution and the alkaline solution are simultaneously atomized by an ultrasonic atomizer, and then placed in the tank for mixing to form a uniform sol, which is then kept at 80-90°C for 4-5 hours to complete the zinc precipitation reaction and generate a nano zinc oxide precursor.

[0017] Heat treatment and post-treatment: Microwave heating of the reaction liquid to 70-80°C to quickly decompose the precursor, centrifugation and washing with ethanol and deionized water, drying at 50-60°C, and calcination at 250-350°C for 0.5-1 hour to remove organic matter and improve crystallinity.

[0018] The mixing and reacting step of placing the mixture in the tank comprises the following steps: S1. Put solid and liquid raw materials into the tank; S2, lowering the stirring rod to the bottom of the tank body so that it is placed in the solution, and starting the first motor to drive the stirring rod to rotate and stir the solution; S3, while stirring, start the vacuum pump to input gas to the stirring rod, the gas flow process is heated by the heating wire, and the gas is ejected into the solution through the outlet hole; S4, during the stirring process, the stirring rod moves back and forth below the support frame to expand the stirring range; S5. After mixing, the stirring rod rises and returns to its initial position.

[0019] The beneficial effects of the present invention are as follows: 1. The high-activity nano zinc oxide preparation device and preparation method described in the present invention can stir the solution inside the tank body by driving the stirring rod to rotate inside the tank body by a first motor, and at the same time, a vacuum pump inputs high-temperature gas into the stirring rod, and the high-temperature gas sprayed from the air outlet can heat the solution during the stirring process, thereby achieving more uniform mixing of the solution.

[0020] 2. The present invention discloses a highly active nano zinc oxide preparation device and preparation method. By arranging an air guide column inside the stirring rod, the air outlet can be opened and closed. The air pressure drives the rotating plate to rotate, so that the air guide hole and the air outlet are automatically connected when the gas is input. When the gas input stops, the air guide column is automatically driven to rotate by the coil spring, and the air outlet and the air guide hole are separated, so as to prevent the solution from entering the stirring rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 is a stereogram of the present invention; Figure 2 It is a schematic diagram of the internal structure of the tank body in the present invention; Figure 3 It is a schematic diagram of the stirring rod structure in the present invention; Figure 4 It is a schematic diagram of the structure of the vacuum pump in the present invention; Figure 5 It is a schematic diagram of the support frame structure in the present invention; Figure 6 It is a schematic diagram of the internal structure of the stirring rod in the present invention; Figure 7 It is a schematic diagram of the internal structure of the fixed head in the present invention; Figure 8 It is a schematic diagram of the internal structure of the connector in the present invention; Fig. 9 It is a schematic diagram of the structure of the flow guide tube in the present invention.

[0023] In the figure: 1, tank body; 11, storage box; 12, output port; 2, first motor; 21, toothed disc; 22, second motor; 221, output gear; 23, rotating frame; 231, lifting rod; 232, tooth groove; 3, stirring rod; 31, gear ring; 311, transmission gear; 32, vacuum pump; 321, air inlet cover; 322, water collecting box; 323, water outlet pipe; 324, connector; 325, sealing ball; 326, spring; 33, air guide cylinder ; 331, heating wire; 332, sleeve; 34, support frame; 341, guide groove; 342, bidirectional screw rod; 343, slider; 344, pulley; 35, fixed head; 351, telescopic cylinder; 352, first slide cavity; 353, second slide cavity; 354, rotating column; 355, rotating plate; 356, air inlet; 36, air guide column; 361, air outlet; 362, air guide hole; 363, coil spring; 37, guide tube; 371, top block. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0025] like Figures 1 to 6 As shown, a highly active nano zinc oxide preparation device according to an embodiment of the present invention comprises a tank body 1, an output port 12 is installed at the bottom end of the tank body 1, a storage box 11 is fixed at the top end of the tank body 1, a feed port is opened at one side of the top end of the tank body 1, a first motor 2 is installed at one side of the top end of the storage box 11, a gear 21 is rotatably connected to the top end of the storage box 11, a gear is fixed to the end of the rotating shaft of the first motor 2, the gear is meshed and connected with the gear 21, and a telescopic hole is opened in the middle of the gear 21. A lifting rod 231 is inserted into the telescopic hole, a rotating frame 23 is fixed to the bottom end of the lifting rod 231, a stirring rod 3 is arranged below the rotating frame 23, a vacuum pump 32 is arranged inside the rotating frame 23, an air guide cylinder 33 is fixed to the air outlet end of the vacuum pump 32, an electric heating wire 331 is arranged inside the air guide cylinder 33, a sleeve 332 is fixed to the outside of the bottom end of the air guide cylinder 33, the sleeve 332 is connected to the stirring rod 3, and two groups of air outlet holes 361 are opened at equal intervals on the outside of the stirring rod 3; In the process of preparing highly active nano zinc oxide, the solid raw material needs to be crushed by a crusher first. After the crushing, the solid raw material and the liquid raw material need to be mixed to react with each other. During the mixing process, the solid raw material and the liquid raw material are put into the tank body 1 through the feed port. At this time, there is a solid-liquid mixture at the bottom of the tank body 1. Then the solid-liquid mixture needs to react. At this time, the stirring rod 3 is placed at the bottom of the tank body 1 so that it is inserted into the solid-liquid mixture. Then the first motor 2 is started to drive the gear disc 21 to rotate. At this time, the gear disc 21 drives the lifting rod 231 to rotate, and the lifting rod 231 drives the rotating frame 23 to rotate. The rotating frame 23 drives the stirring rod 3 to rotate. At this time, the stirring rod 3 can stir and mix the solid-liquid mixture inside the tank body 1. At this time, the solid-liquid mixture can fully react with each other. At the same time, the solution needs to be heated during the reaction to promote the reaction by heating. The vacuum pump 32 is started while the stirring rod 3 is rotating. The gas is extracted and output to the inside of the gas cylinder 33. At this time, the electric heating wire 331 inside the gas cylinder 33 is energized and heated, so that the gas can be heated when passing through the inside of the gas cylinder 33. Then, the heated gas is transported to the inside of the three stirring rods 3 through the sleeve 332. At this time, the gas inside the stirring rod 3 can be sprayed to the outside through the air outlet 361. Multiple jet holes are arranged on both sides of the air outlet 361, so that the gas sprayed from the air outlet 361 can heat the liquid on the outside and inside of the rotation track simultaneously during the rotation of the stirring rod 3. At this time, the solution inside the tank body 1 can be heated and mixed more quickly and evenly, reducing the time of heat transfer and improving the reaction efficiency of the solid-liquid mixture. After mixing, the solution inside the tank body 1 is precipitated. After precipitation, the solution inside the tank body 1 can be discharged to the outside through the output port 12. At this time, the mixing step in the preparation process can be completed, and then the processed raw materials can be transported to the next equipment for crystallization treatment. The preparation of high-activity nano zinc oxide can be completed through the above steps.

[0026] like Figures 1 to 5 As shown, three support frames 34 are fixed at equal intervals below the rotating frame 23, the air guide cylinder 33 is fixed at the top of the support frame 34, the top of the stirring rod 3 is slidably connected to the inside of the support frame 34, both sides of the support frame 34 are provided with guide grooves 341, the inside of the guide grooves 341 is rotatably connected with a bidirectional screw rod 342, both sides of the top of the stirring rod 3 are fixed with sliders 343, the sliders 343 are slidably connected to the inside of the guide grooves 341, and the sliders 343 are threadedly connected to the bidirectional screw rod 342; When the stirring rod 3 stirs the solution inside the tank body 1, the stirring area of ​​the stirring rod 3 is small, so the stirring rod 3 is set to be movable. During the stirring process, the bidirectional screw 342 rotates inside the guide groove 341. During the rotation, the bidirectional screw 342 drives the slider 343 to reciprocate inside the guide groove 341. At this time, the slider 343 can drive the stirring rod 3 to adjust the distance from the center of the rotating frame 23 during the stirring process, so that the stirring rod 3 can stir the solid-liquid mixture inside the tank body 1 over a larger range.

[0027] like Figures 1 to 5 As shown, a pulley 344 is fixed to one end of the bidirectional screw rod 342 close to the stirring rod 3, a transmission gear 311 is arranged between the two pulleys 344, the transmission gear 311 is rotatably connected to the side of the rotating frame 23, a double-groove pulley is fixed to the side of the transmission gear 311 close to the pulley 344, the double-groove pulley is connected to the two pulleys 344 through a belt, a gear ring 31 is fixed to the middle part of the tank body 1, and the three transmission gears 311 can be meshed and connected with the gear ring 31; During the rotation of the stirring rod 3, the transmission gear 311 on one side of the support frame 34 will be at a height in contact with the ring gear 31. When the stirring rod 3 is stirring, the rotating frame 23 will drive the support frame 34 to rotate. When the support frame 34 rotates, it will drive the transmission gear 311 to move. At this time, the ring gear 31 is in a fixed state, which can make the transmission gear 311 roll during the movement. When the transmission gear 311 rolls, it will use a belt to drive the pulley 344 to rotate through the double-groove pulley. The pulley 344 drives the bidirectional screw rod 342 to rotate, which can realize the automatic reciprocating movement of the slider 343 during the rotation of the stirring rod 3, which is more convenient for the stirring rod 3 to stir the solution.

[0028] like Figures 1 to 5 As shown, a fixed head 35 is fixed to the top of the stirring rod 3, and a telescopic cylinder 351 is fixed to the side of the fixed head 35 close to the water collecting tank 322, and the telescopic cylinder 351 is inserted into the interior of the water collecting tank 322; When the water collecting tank 322 transports gas to the inside of the stirring rod 3, the gas will be input into the fixed head 35 through the telescopic cylinder 351. When the stirring rod 3 moves, the fixed head 35 will be driven to move together. At this time, the fixed head 35 will push the telescopic cylinder 351 to move. The telescopic cylinder 351 will be extended and retracted inside the water collecting tank 322. At this time, the water collecting tank 322 and the telescopic cylinder 351 can always be connected during the movement of the stirring rod 3.

[0029] like Figures 1 to 5As shown, the interior of the fixed head 35 is rotatably connected with a rotating column 354, a first sliding cavity 352 is provided on one side of the interior of the fixed head 35, a second sliding cavity 353 is provided on one side of the first sliding cavity 352, a rotating plate 355 is fixed on one side of the rotating column 354, the rotating plate 355 is slidably connected to the interior of the first sliding cavity 352, an air inlet hole 356 is provided on the outer side of the rotating column 354, the air inlet hole 356 is provided on the side of the rotating plate 355 close to the second sliding cavity 353, the bottom end of the rotating column 354 is fixedly connected to the top end of the air guide column 36, the air inlet hole 356 is communicated with the interior of the air guide column 36, air guide holes 362 are provided on both sides of the air guide column 36, the bottom end of the air guide column 36 is rotatably connected to the stirring rod 3 through a rotating block, a coil spring 363 is fixed to the outside of the rotating block, and the bottom end of the coil spring 363 is fixedly connected to the stirring rod 3; When in use, the gas needs to be discharged from the gas outlet 361. However, when not in use, the solution will enter the interior of the gas guide column 36 through the gas outlet 361. At this time, after the solution enters the interior of the gas guide column 36, the solid will accumulate inside after the water evaporates. After a long period of accumulation, the gas outlet volume of the gas outlet 361 will become smaller. Therefore, the gas guide column 36 is arranged inside the stirring rod 3. When not in use, the rotating plate 355 is pressed against one side of the telescopic cylinder 351. At the same time, the gas guide hole 362 and the corresponding gas outlet hole 361 form an angle of 50°. During use, the sleeve 332 inputs gas into the interior of the fixed head 35 through the telescopic cylinder 351. At this time, the gas enters the pipeline of the fixed head 35. Under the pressure of the gas, the rotating plate 355 will be pushed to rotate inside the first sliding cavity 352. At this time, the rotating plate 355 drives the rotating column 354 to rotate, and the rotating column 354 also drives the gas guide column 36 to rotate. When the rotating plate 355 rotates 50°, it enters the interior of the second sliding cavity 353. The inner diameter of the second sliding cavity 353 is greater than the inner diameter of the first sliding cavity 352. Therefore, the rotating plate 355 inside the second sliding cavity 353 cannot block the gas. The gas will enter the inside of the air inlet 356 through the second sliding cavity 353. The air inlet 356 inputs the gas into the inside of the air guide column 36. At the same time, the rotating column 354 drives the air guide column 36 to rotate 50 degrees, and the air guide hole 362 is aligned with the air outlet hole 361. At this time, the air guide column 36 discharges the gas through the air guide hole 362, and the gas can pass through The gas is discharged into the interior of the air outlet hole 361 through the air guide hole 362, and the air outlet hole 361 discharges the gas to the outside. After use, the sleeve 332 stops inputting gas into the interior of the fixed head 35, and the elastic force of the coil spring 363 will drive the air guide column 36 to rotate 50° in the opposite direction to reset. At this time, the air outlet hole 361 and the air guide hole 362 are misaligned, so that the air outlet hole 361 can be sealed, which can prevent external liquid from entering the interior of the stirring rod 3, and when the air guide column 36 is reset, the rotating column 354 will be driven to reset.

[0030] like Figure 1 to Figure 2As shown, a tooth groove 232 is provided on one side of the lifting rod 231, a second motor 22 is installed on the top of the toothed disc 21, an output gear 221 is fixed to the end of the rotating shaft of the second motor 22, and the output gear 221 is meshedly connected with the tooth groove 232; In the initial state, the stirring rod 3 is lifted to the inside of the storage box 11. When in use, the second motor 22 drives the output gear 221 to rotate through the tooth groove 232 to lower the lifting rod 231, and then the stirring rod 3 can be moved to the working station in use. At this time, the ring gear 31 can be automatically connected to the transmission gear 311. After stirring, the solution needs to be precipitated. At this time, the second motor 22 drives the output gear 221 to rotate in the opposite direction, so that the lifting rod 231 can be lifted upward. At this time, the stirring rod 3 is driven to rise, which will not affect the solution precipitation inside the tank body 1, and the connection between the ring gear 31 and the transmission gear 311 can be cut off.

[0031] like Figures 1 to 4 As shown, an air intake cover 321 is fixed to the air intake end of the vacuum pump 32, a water filter cotton is arranged inside the air intake cover 321, a water collecting box 322 is fixed to the bottom end of the air intake cover 321, and a water outlet pipe 323 is fixed to the bottom end of the water collecting box 322; When high-temperature gas is blown into the solution through the air outlet 361, the gas will emerge from the water surface and take away some moisture. In order to prevent moisture from affecting the vacuum during vacuuming, an air intake hood 321 is provided. The water filter cotton inside the air intake hood 321 can filter out the moisture inside the inhaled gas. The moisture inside the water filter cotton will accumulate and flow downward. At this time, the water collecting tank 322 can store the water flow.

[0032] like Figures 1 to 9 As shown, a connector 324 is fixed to one side of the water outlet pipe 323, a sealing ball 325 is provided on one side of the interior of the connector 324, one side of the sealing ball 325 extends to the outside of the connector 324, a spring 326 is fixed to one side of the interior of the connector 324, and the other side of the spring 326 is fixedly connected to the sealing ball 325, a guide tube 37 is fixed to one side of the interior of the storage box 11, and a top block 371 is fixed to one end of the guide tube 37 placed inside the storage box 11; In the initial state, the spring 326 pushes the sealing ball 325 to seal the connector 324. When the stirring rod 3 is raised, the connector 324 is first aligned with the position of the guide tube 37. Then, when the stirring rod 3 is raised, the connector 324 will rise together. When the connector 324 is close to the guide tube 37, the sealing ball 325 will first contact the guide tube 37. At this time, the guide tube 37 can push the sealing ball 325 into the interior of the connector 324. The water inside the water collecting tank 322 is input into the interior of the connector 324 through the outlet pipe 323. The connector 324 inputs water into the interior of the guide tube 37. At this time, the guide tube 37 can discharge the water to the outside. The top block 371 can make the sealing ball 325 always remain in the state of being pushed into the connector 324 when the connector 324 is connected to the guide tube 37. In this way, the moisture content of the solution inside the tank body 1 can be reduced, the solution concentration can be increased, and the subsequent precipitation operation is more convenient.

[0033] A method for preparing highly active nano zinc oxide comprises the following steps: Raw material pretreatment: Use ultrasonic grinding to grind urea to 400-500 mesh, dissolve zinc nitrate, urea and sodium hydroxide in a mixed solvent of isopropanol at a ratio of 1:2, and add a surfactant.

[0034] ‌Mixing and reaction: The zinc salt solution and the alkaline solution are simultaneously atomized by an ultrasonic atomizer, and are placed in the tank 1 for mixing to form a uniform sol, which is kept at 80-90°C for 4-5 hours to complete the zinc precipitation reaction and generate a nano zinc oxide precursor.

[0035] Heat treatment and post-treatment: Microwave heating of the reaction liquid to 70-80°C to quickly decompose the precursor, centrifugation and washing with ethanol and deionized water, drying at 50-60°C, and calcination at 250-350°C for 0.5-1 hour to remove organic matter and improve crystallinity.

[0036] The mixing and reacting step of placing the mixture in the tank 1 comprises the following steps: S1, putting solid and liquid raw materials into the tank 1; S2, lowering the stirring rod 3 to the bottom of the tank body 1 so that it is placed in the solution, and starting the first motor 2 to drive the stirring rod 3 to rotate and stir the solution; S3, while stirring, start the vacuum pump 32 to input gas to the stirring rod 3, the gas flow process is heated by the heating wire 331, and the gas is ejected into the solution through the gas outlet 361; S4, during the stirring process, the stirring rod 3 moves back and forth below the support frame 34 to expand the stirring range; S5: After mixing, the stirring rod 3 rises and returns to its initial position.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A highly active nano zinc oxide preparation device, characterized in that: It comprises a tank body, an output port is installed at the bottom end of the tank body, a storage box is fixed at the top end of the tank body, a feed port is opened at one side of the top end of the tank body, a first motor is installed at one side of the top end of the storage box, a gear disc is rotatably connected to the top end of the storage box, a gear is fixed at the end of the rotating shaft of the first motor, the gear is meshed and connected with the gear disc, a telescopic hole is opened in the middle of the gear disc, a lifting rod is inserted in the inside of the telescopic hole, a rotating frame is fixed at the bottom end of the lifting rod, a stirring rod is arranged below the rotating frame, a vacuum pump is arranged inside the rotating frame, an air guide cylinder is fixed at the air outlet end of the vacuum pump, a heating wire is arranged inside the air guide cylinder, a sleeve is fixed outside the bottom end of the air guide cylinder, the sleeve is connected with the stirring rod, and two sets of air outlet holes are opened at equal intervals on the outside of the stirring rod; A fixed head is fixed on the top of the stirring rod, and a telescopic cylinder is fixed on the side of the fixed head close to the water collecting tank, the telescopic cylinder is inserted into the inside of the water collecting tank, and a rotating column is rotatably connected to the inside of the fixed head, a first sliding cavity is opened on one side of the inside of the fixed head, and a second sliding cavity is opened on one side of the first sliding cavity, a rotating plate is fixed on one side of the rotating column, and the rotating plate is slidably connected to the inside of the first sliding cavity, and an air inlet hole is opened on the outside of the rotating column, and the air inlet hole is opened on the side of the rotating plate close to the second sliding cavity, the bottom end of the rotating column is fixedly connected to the top of the air guide column, the air inlet hole is communicated with the inside of the air guide column, and air guide holes are opened on both sides of the air guide column, the bottom end of the air guide column is rotatably connected to the stirring rod through a rotating block, and a coil spring is fixed to the outside of the rotating block, and the bottom end of the coil spring is fixedly connected to the stirring rod.

2. A highly active nano zinc oxide preparation device according to claim 1, characterized in that: Three support frames are fixed at equal intervals below the rotating frame, the air guide cylinder is fixed at the top of the support frame, the top of the stirring rod is slidably connected to the inside of the support frame, guide grooves are opened on both sides of the support frame, and a bidirectional screw rod is rotatably connected inside the guide groove, and sliders are fixed on both sides of the top of the stirring rod, the sliders are slidably connected to the inside of the guide groove, and the sliders are threadedly connected to the bidirectional screw rod.

3. A highly active nano zinc oxide preparation device according to claim 2, characterized in that: A pulley is fixed at one end of the bidirectional screw near the stirring rod, a transmission gear is arranged between the two pulleys, the transmission gear is rotatably connected to the side of the rotating frame, a double-groove pulley is fixed on the side of the transmission gear near the pulley, the double-groove pulley is connected to the two pulleys through a belt, a gear ring is fixed in the middle of the tank body, and three transmission gears can be meshed and connected with the gear ring.

4. The device for preparing highly active nano zinc oxide according to claim 1, characterized in that: A tooth groove is provided on one side of the lifting rod, a second motor is installed on the top of the toothed disc, an output gear is fixed on the end of the rotating shaft of the second motor, and the output gear is meshedly connected with the tooth groove.

5. The device for preparing highly active nano zinc oxide according to claim 1, characterized in that: An air intake hood is fixed to the air intake end of the vacuum pump, water filter cotton is arranged inside the air intake hood, a water collecting tank is fixed to the bottom end of the air intake hood, and a water outlet pipe is fixed to the bottom end of the water collecting tank.

6. A highly active nano zinc oxide preparation device according to claim 5, characterized in that: A connector is fixed on one side of the water outlet pipe, a sealing ball is provided on one side inside the connector, one side of the sealing ball extends to the outside of the connector, a spring is fixed on one side inside the connector, the other side of the spring is fixedly connected to the sealing ball, a guide tube is fixed on one side inside the storage box, and a top block is fixed on one end of the guide tube placed inside the storage box.

7. A method for preparing high-activity nano zinc oxide, using the high-activity nano zinc oxide preparation device described in any one of claims 1 to 6, characterized in that: The preparation method comprises the following steps: Raw material pretreatment: Use ultrasonic grinding to grind urea to 400-500 mesh, dissolve zinc nitrate, urea and sodium hydroxide in a mixed solvent of isopropanol at a ratio of 1:2, and add a surfactant; ‌Mixing and reaction: The zinc salt solution and the alkaline solution are simultaneously atomized by an ultrasonic atomizer, and then placed in the tank for mixing to form a uniform sol, which is then kept at 80-90°C for 4-5 hours to complete the zinc precipitation reaction and generate a nano zinc oxide precursor; Heat treatment and post-treatment: Microwave heating of the reaction liquid to 70-80°C to quickly decompose the precursor, centrifugation and washing with ethanol and deionized water, drying at 50-60°C, and calcination at 250-350°C for 0.5-1 hour to remove organic matter and improve crystallinity.

8. A method for preparing highly active nano zinc oxide according to claim 7, characterized in that: The mixing and reacting step of placing the mixture in the tank comprises the following steps: S1. Put solid and liquid raw materials into the tank; S2, lowering the stirring rod to the bottom of the tank body so that it is placed in the solution, and starting the first motor to drive the stirring rod to rotate and stir the solution; S3, while stirring, start the vacuum pump to input gas to the stirring rod, the gas flow process is heated by the heating wire, and the gas is ejected into the solution through the outlet hole; S4, during the stirring process, the stirring rod moves back and forth below the support frame to expand the stirring range; S5. After mixing, the stirring rod rises and returns to its initial position.

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