Preparation method and preparation device of titanium-based honeycomb catalyst

Abstract

The invention relates to the technical field of catalysts, in particular to a preparation method and a preparation device of a titanium-based honeycomb catalyst. The mixing assembly comprises a stirring rod arranged on the inner bottom wall of the mixing tank and a cleaning rod arranged on the inner side wall of the mixing tank and matched with the inner side wall of the mixing tank; the batching assembly comprises a driving part, a moving part and a switching part; wherein the driving piece comprises a first moving block arranged on the inner wall of the mixing tank, a second moving block arranged in the mixing tank, a transmission cylinder arranged on the outer side of the second moving block, and a first guide groove formed in the end face of the transmission cylinder; stirring operation is achieved through rotation of the stirring rod and the cleaning rod, meanwhile, the cleaning rod is used for enabling the transmission cylinder to rotate automatically and rotate synchronously for the driving shaft, the sliding block pushes the piston to complete feeding of ingredients at different positions, and meanwhile the switching piece is used for completing forward and reverse rotation of the driving shaft and resetting of the sliding block.

Description

Technical Field

[0001] This invention relates to the field of catalyst technology, and in particular to a method and apparatus for preparing a titanium-based honeycomb catalyst. Background Technology

[0002] In fields such as environmental catalysis and energy chemical engineering, catalysts are widely used in various gas-solid or liquid-solid phase reactions. Traditional powder or granular catalysts have disadvantages such as large bed pressure drop, easy pulverization, and difficulty in application to mobile equipment. To address these issues, monolithic honeycomb catalysts have emerged. These catalysts have regularly arranged parallel channels, which can significantly reduce system resistance and facilitate modular installation. They have become the mainstream catalyst form in current industrial catalysis, especially in air pollution control (such as automobile exhaust purification and industrial VOCs treatment).

[0003] The preparation process of honeycomb flue gas denitrification catalysts in the existing technology mainly involves four core stages: raw material mixing, molding, drying, and calcination. First, in the raw material processing stage, the main materials such as nano-titanium dioxide and silicon dioxide are usually mixed with extrusion aids and water to form a paste or slurry. Next, in the molding stage, the uniformly mixed materials are directly extruded through an extruder to form a honeycomb preform. Then, drying is carried out to dehydrate and shrink the preform, achieving a certain weight reduction rate and dimensional stability. Finally, in the calcination stage, the dried preform needs to undergo multiple temperature-increasing calcination processes to ensure the structural stability and activity formation of the catalyst, ultimately obtaining the molded honeycomb denitrification catalyst product.

[0004] During use, the production process of integrated honeycomb catalysts is complex and the production cycle is long. Ti-based SCR catalysts have a wide range of applications and many product specifications, which restricts the production capacity of catalyst manufacturers. Furthermore, due to the processing technology, the components of Ti-based SCR catalysts are uniformly mixed, while the catalytic reaction is a surface reaction, and the effective components inside the catalyst cannot be fully utilized. Summary of the Invention

[0005] In view of the problem of limited catalyst production capacity in the above or existing technologies, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a method for preparing a titanium-based honeycomb catalyst.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] A method for preparing a titanium-based honeycomb catalyst includes the following steps;

[0009] S1: Weigh all raw materials according to the catalyst ratio;

[0010] S2: Dissolve stearic acid in warm water at 60-90℃:

[0011] S3: Add titanium dioxide, deionized water from the workshop, stearic acid solution, and lactic acid to the mixer in sequence, and start stirring for 3-10 minutes;

[0012] S4: Dissolve ammonium metavanadate in ethanolamine or oxalic acid to form a solution, add it to the above-mentioned mixer, and continue stirring;

[0013] S5: Dissolve ammonium metatungstate or / and ammonium paratungstate in water or add directly to the mixer in the above steps, continue stirring for 20-40 minutes;

[0014] S6: Add pulp fiber and / or pulp cotton and ammonia to the above-mentioned mixer and continue stirring;

[0015] S7: Add glass fiber and / or silica sol and / or alumina sol, clay and / or silica and / or diatomaceous earth to the mixer in the above steps, control the pH value of the mud material between 7 and 9, and continue stirring for 1h-3h.

[0016] S8: Observe the state of the mixed mud and test the moisture content and pH value of the mud. The moisture content should be between 23% and 29%, and the pH value should be between 6 and 9.

[0017] S9: Stop mixing, discharge the material, transfer the mixed mud from the mixer to the hopper, and cover the hopper with a cloth;

[0018] S10: Put the well-mixed mud from S9 into a kneader and knead for 0.5-5 hours to make the various components in the mud more evenly mixed together and remove large particles.

[0019] S11: Place the clay obtained in S10 in a workshop with suitable temperature and humidity for a certain period of time to age it, so that the clay has better plasticity.

[0020] S12: Add the mud material from S11 to the extruder. The extruder is equipped with molds of different specifications according to the product specifications.

[0021] S13: Transfer the clay blanks from S12 to a constant temperature and humidity workshop, and cover the surface of the clay blanks with cardboard or cotton fabric, etc.

[0022] S14: Transfer the clay blanks from S13 to the secondary drying chamber and continue drying to remove moisture from the clay blanks until the moisture content of the clay blanks is ≤10%;

[0023] S15: The qualified green body after drying in S14 is transferred into a tunnel kiln for calcination, so that the organic matter in the green body can be fully reacted and oxidized, and a catalyst with rich porous structure and high mechanical strength is formed.

[0024] S16: Prepare a solution of other active components and additives with deionized water in the workshop. Briefly place the primary catalyst obtained in S15 into the above solution. Control the final amount of active components loaded onto the primary catalyst by controlling the impregnation time, impregnation solution concentration, and number of impregnations.

[0025] S17: Dry the primary catalyst obtained in S16 at a temperature between 30-120°C until the water content is ≤5%;

[0026] S18: Place the primary catalyst from S17 in a calcination furnace and calcinate it for 0.5-3 hours. The maximum calcination temperature is 400-650℃. The resulting product is a titanium-based honeycomb catalyst.

[0027] In a preferred embodiment of the titanium-based honeycomb catalyst preparation method of the present invention, the following steps are described: In step S10, the kneading time of the clay is 0.5-5 hours, ensuring a more uniform mixing of various components in the clay, removing large particles while maintaining a certain degree of plasticity; and in step S11, the aging time is 5-72 hours, allowing the clay to achieve better shaping through capillary action, preventing uneven particle size or insufficient plasticity in subsequent foundation processes, which could lead to breakage of the extruded clay blank; and in step S12, depending on product specifications, the extruder is equipped with molds of different specifications, and the clay is extruded at a pressure of 1-10 MPa to form a rectangular clay blank with a cross-section of 150mm*150mm. Then, according to requirements, it is cut using a wire saw to achieve a length between 100mm and 1200mm for the rectangular clay blank.

[0028] As a preferred embodiment of the titanium-based honeycomb catalyst preparation method of the present invention, wherein: in step S13, the surface of the clay blank includes cardboard or cotton fabric, etc., to ensure that the surface and inner layers of the clay blank do not lose water too quickly or have too large a difference in water loss rate, thus preventing cracking; during the drying process, the temperature is between 20-60℃ and the humidity is between 90%-25%; by setting a drying temperature rise curve, the clay blank is kept at different temperature and humidity points for a certain period of time, so that the water content in the clay blank gradually decreases until the water content is ≤25%, at which point the drying process ends; the entire drying process takes 7-20 days. The drying temperature rise curve is as follows: the green body is dried for 4 days at ≤35℃ and 90% relative humidity, then dried for 3 days at ≤45℃ and 70% relative humidity, and then dried for 2 days at 50℃ and 40% relative humidity; furthermore, in step S14, the temperature control parameters are between 55-65℃, the humidity drops from 40% to below 10%, and the residence time is generally ≥2 days. The drying times for the first and second drying stages are related to the final catalyst specifications, such as the aforementioned honeycomb catalyst being 150mm*150mm*(200mm-12). The catalyst has a rectangular structure with a cross-sectional area of ​​150mm. In the catalyst industry, product specifications are named according to the number of pores on a 150mm side. For example, a 20-pore catalyst means there are 20 uniformly sized pores on a 150mm side, i.e., 20*20 pores on a 150mm*150mm cross-section. Furthermore, in step S15, calcination allows the organic matter in the preform to fully react and oxidize, forming a catalyst with a rich porous structure and high mechanical strength. Simultaneously, the precursor salt containing the active component decomposes into active catalyst components. The catalyst components, such as ammonium metavanadate, decompose into V2O5. During this process, the calcination temperature should be between 200-400℃ for a sufficient duration, generally between 8-20 hours, to ensure the slow and complete decomposition and oxidation of the organic matter added in the previous process. The maximum calcination temperature is between 400-650℃. Within this temperature range, the catalyst residence time should be between 10-20 hours. During the calcination heating process, the heating rate of the calcination furnace should be ≤5℃min. After calcination, the catalyst is naturally cooled to room temperature in a tunnel kiln to obtain the first-stage honeycomb catalyst.

[0029] The beneficial effects of the titanium-based honeycomb catalyst preparation method of the present invention are as follows:

[0030] This invention allows for the addition of active component V and co-catalyst component W to the primary catalyst without or in small amounts. This not only directly saves the amount of V and W used, but also allows for the flexible production of products of different specifications by adding different amounts of V and W according to different usage environments.

[0031] This invention uses impregnation or coating processes to load V, W, or other active components onto a primary honeycomb catalyst. The concentration of these components on the surface of the Ti-based honeycomb catalyst is higher than that in the inner layer. When flue gas passes through, it can quickly come into contact with the high concentration of active sites on the surface, resulting in high denitrification efficiency.

[0032] This invention utilizes methods such as equal-volume impregnation to prepare bifunctional composite catalysts. For example, a primary honeycomb catalyst is impregnated with one or more precious metals at its tail end to form a composite catalyst capable of catalyzing NOx and CO, thus synergistically treating pollutants in flue gas.

[0033] In actual use, there is still the issue of needing to add different ingredients depending on the mixing time.

[0034] To solve the above-mentioned technical problems, the present invention also provides the following technical solution: a preparation apparatus, including a method for preparing a titanium-based honeycomb catalyst, and a mixing tank;

[0035] And, the mixing assembly includes a stirring rod disposed on the bottom wall of the mixing tank and a cleaning rod disposed on the inner side wall of the mixing tank and adapted to the inner side wall of the mixing tank.

[0036] And, the dispensing assembly, including drive components, moving components and switching components;

[0037] The driving component includes a first moving block disposed on the inner wall of the mixing tank, a second moving block disposed inside the mixing tank, a transmission cylinder disposed on the outer side of the second moving block, a first guide groove formed on the end face of the transmission cylinder, and a first guide shaft disposed on the outer wall of the second moving block and slidable along the first guide groove.

[0038] Furthermore, the moving component includes a storage chamber disposed inside the mixing tank, a piston disposed on the outer wall of the storage chamber, a drive shaft disposed on the end face of the first bevel gear, and a sliding block disposed on the outer wall of the drive shaft.

[0039] Furthermore, the switching component includes a movable rod disposed on the outside of the piston, a moving plate disposed on the end face of the movable rod, a pressing plate disposed on the outside of the transmission cylinder, and a locking plate disposed on the outside of the moving plate;

[0040] The stirring rod and the cleaning rod are used to achieve the stirring operation. At the same time, the cleaning rod causes the transmission cylinder to rotate, which is synchronized with the rotation of the drive shaft. This causes the sliding block to push the piston to complete the feeding of materials at different positions. Meanwhile, the switching component is used to complete the forward and reverse rotation of the drive shaft and complete the reset of the sliding block.

[0041] In a preferred embodiment of the preparation device of the present invention, the mixing assembly further includes a motor disposed inside the mixing tank and a mounting base disposed at the output end of the motor. The mounting base is provided with a driving wheel and a driven wheel inside, the driving wheel and the driven wheel are meshed together, the outer wall of the driven wheel is provided with a first connecting plate, the stirring rod is fixedly connected to the first connecting plate, the outer wall of the mounting base is provided with a second connecting plate, and the cleaning rod is disposed at the end of the second connecting plate.

[0042] In a preferred embodiment of the preparation device of the present invention, the driving component further includes a first spring disposed on the upper end face of the second moving block and a mounting bracket disposed inside the mixing tank. The outer wall of the mounting bracket is provided with a first bevel gear, and the end of the first spring is disposed on the inner wall of the mixing tank.

[0043] In a preferred embodiment of the preparation device of the present invention, the transmission cylinder is disposed on the outer wall of the mounting frame, the outer wall of the transmission cylinder is provided with a second bevel gear, the outer wall of the second bevel gear is provided with a connecting shaft, the connecting shaft passes through the transmission cylinder, and the first bevel gear and the second bevel gear are meshed and connected.

[0044] In a preferred embodiment of the preparation device of the present invention, the moving part further includes a plug installed on the outer wall of the storage cavity and a guide rod disposed on the outer wall of the mounting frame. The guide rod passes through the sliding block and its end is disposed on the outer wall of the storage cavity. A second spring is disposed on the outer wall of the piston, and the end of the second spring is disposed on the outer wall of the storage cavity. A transmission ring is disposed on the inner wall of the sliding block. The transmission ring is threadedly connected to the drive shaft. The outer wall of the transmission ring is provided with a limiting groove distributed in an annular pattern.

[0045] In a preferred embodiment of the preparation device of the present invention, the outer wall of the sliding block is provided with a fixed block, the lower end face of the fixed block is provided with a third spring, the end of the third spring is provided with a limiting plate adapted to the limiting groove, the outer wall of the sliding block is provided with a movable plate, the center of the outer wall of the movable plate is provided with a second guide groove, and the outer wall of the limiting plate is provided with a second guide shaft extending to the outside of the second guide groove.

[0046] In a preferred embodiment of the preparation device of the present invention, the switching component further includes a locking groove formed on the outer wall of the connecting shaft and a fourth spring disposed on the outer wall of the locking groove. The end of the fourth spring is disposed on the outer wall of the locking plate. A third guide groove is formed on the outer wall of the movable rod. A fixed rod that can slide along the third guide groove is disposed on the end face of the piston. A rotating rod is disposed on the outer wall of the movable rod. The rotating rod is rotatably connected to the inside of the mixing tank.

[0047] The beneficial effects of the preparation device of the present invention are as follows: the stirring operation is achieved by rotating the stirring rod and the cleaning rod, and the transmission cylinder is rotated by the cleaning rod, which is synchronously rotated by the drive shaft, so that the sliding block pushes the piston to complete the feeding of materials at different positions. At the same time, the switching component is used to complete the forward and reverse rotation of the drive shaft and complete the reset of the sliding block. Attached Figure Description

[0048] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the structure of a honeycomb catalyst used in the preparation method of titanium-based honeycomb catalysts.

[0050] Figure 2 This is a schematic diagram of the production process structure of a titanium-based honeycomb catalyst.

[0051] Figure 3 This is a schematic diagram of the overall structure of the preparation device.

[0052] Figure 4 A schematic diagram of the mixing component structure of the preparation device.

[0053] Figure 5 This is a partial structural diagram of the mixing component of the preparation device.

[0054] Figure 6 This is a schematic diagram of the material preparation component structure of the preparation device.

[0055] Figure 7 This is a schematic diagram of the drive component structure of the fabrication device.

[0056] Figure 8 This is a schematic diagram of the transmission cylinder structure of the preparation device.

[0057] Figure 9 This is a schematic diagram of the moving parts of the preparation device.

[0058] Figure 10 This is a partial structural diagram of the moving parts of the preparation device.

[0059] Figure 11 This is a schematic diagram of the switching component of the preparation device.

[0060] Figure 12 This is a schematic diagram of the movable rod structure of the preparation device.

[0061] Figure 13 This is a partial structural diagram of the switching component of the preparation device.

[0062] Wherein: 1. Mixing tank; 2. Mixing assembly; 21. Mounting base; 22. Motor; 23. Drive wheel; 24. Driven wheel; 25. First connecting plate; 26. Stirring rod; 27. Second connecting plate; 28. Cleaning rod; 3. Batching assembly; 31. Driving component; 311. First moving block; 312. Second moving block; 313. Mounting frame; 314. First bevel gear; 315. Transmission cylinder; 316. First guide groove; 317. Second bevel gear; 318. First spring; 319. First guide shaft; 3110. Connecting shaft; 32. Moving component; 321. Storage chamber; 322. 323. Plug; 324. Piston; 325. Second spring; 326. Drive shaft; 327. Sliding block; 328. Transmission ring; 329. Limiting groove; 320. Movable plate; 3210. Second guide groove; 3211. Fixed block; 3212. Limiting plate; 3213. Third spring; 3214. Second guide shaft; 3215. Guide rod; 33. Switching component; 331. Movable rod; 332. Moving plate; 333. Third guide groove; 334. Rotating rod; 335. Fixed rod; 336. Pressing plate; 337. Locking groove; 338. Fourth spring; 339. Locking plate. Detailed Implementation

[0063] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0064] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0065] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0066] Example 1, referring to Figure 1 and Figure 2 This is the first embodiment of the present invention. This embodiment provides a method for preparing a titanium-based honeycomb catalyst, which can improve the catalyst manufacturing capacity and the denitrification efficiency of the catalyst. The method includes the following steps:

[0067] S1: Weigh all raw materials according to the catalyst ratio;

[0068] S2: Dissolve stearic acid in warm water at 60-90℃:

[0069] S3: Add titanium dioxide, deionized water from the workshop, stearic acid solution, and lactic acid to the mixer in sequence, and start stirring for 3-10 minutes;

[0070] S4: Dissolve ammonium metavanadate in ethanolamine or oxalic acid to form a solution, add it to the above-mentioned mixer, and continue stirring;

[0071] S5: Dissolve ammonium metatungstate or / and ammonium paratungstate in water or add directly to the mixer in the above steps, continue stirring for 20-40 minutes;

[0072] S6: Add pulp fiber and / or pulp cotton and ammonia to the above-mentioned mixer and continue stirring;

[0073] S7: Add glass fiber and / or silica sol and / or alumina sol, clay and / or silica and / or diatomaceous earth to the mixer in the above steps, control the pH value of the mud material between 7 and 9, and continue stirring for 1h-3h.

[0074] S8: Observe the state of the mixed mud and test the moisture content and pH value of the mud. The moisture content should be between 23% and 29%, and the pH value should be between 6 and 9.

[0075] S9: Stop mixing, discharge the material, transfer the mixed mud from the mixer to the hopper, and cover the hopper with a cloth;

[0076] S10: Put the well-mixed mud from S9 into a kneader and knead for 0.5-5 hours to make the various components in the mud more evenly mixed together and remove large particles.

[0077] S11: Place the clay obtained in S10 in a workshop with suitable temperature and humidity for a certain period of time to age it, so that the clay has better plasticity.

[0078] S12: Add the mud material from S11 to the extruder. The extruder is equipped with molds of different specifications according to the product specifications.

[0079] S13: Transfer the clay blanks from S12 to a constant temperature and humidity workshop, and cover the surface of the clay blanks with cardboard or cotton fabric, etc.

[0080] S14: Transfer the clay blanks from S13 to the secondary drying chamber and continue drying to remove moisture from the clay blanks until the moisture content of the clay blanks is ≤10%;

[0081] S15: The qualified green body after drying in S14 is transferred into a tunnel kiln for calcination, so that the organic matter in the green body can be fully reacted and oxidized, and a catalyst with rich porous structure and high mechanical strength is formed.

[0082] S16: Prepare a solution of other active components and additives with deionized water in the workshop, briefly place the primary catalyst obtained in S15 into the above solution, and control the final active components to be quantitatively loaded onto the primary catalyst by controlling the impregnation time, impregnation solution concentration, impregnation times, etc.

[0083] S17: Dry the primary catalyst obtained in S16 at a temperature between 30-120°C until the water content is ≤5%;

[0084] S18: Place the primary catalyst from S17 in a calcination furnace and calcinate it for 0.5-3 hours. The maximum calcination temperature is 400-650℃. The resulting product is a titanium-based honeycomb catalyst.

[0085] Specifically, the kneading time of the clay in S10 is 0.5-5h, which makes the various components in the clay more evenly mixed together, removing large particles while ensuring that the clay has a certain degree of plasticity.

[0086] Furthermore, the aging time in S11 is 5-72 hours, which allows the clay to have better plasticity through capillary action, avoiding problems such as uneven clay particles or insufficient plasticity in the subsequent foundation process, which could lead to cracking of the extruded clay blank.

[0087] Furthermore, in S12, according to product specifications, the extruder is equipped with molds of different specifications. The clay material is extruded under a pressure of 1-10 MPa to form a rectangular clay blank with a cross section of 150mm*150mm. Then, according to requirements, it is cut with a wire cutting saw so that the length of the rectangular clay blank is between 100mm and 1200mm.

[0088] Furthermore, in S13, the surface of the clay blank includes cardboard or cotton fabric, etc., to ensure that the surface and inner layers of the clay blank do not lose water too quickly or have too large a difference in water loss rate, thus preventing cracking. During the drying process, the temperature is between 20-60℃ and the humidity is between 90%-25%. By setting a drying temperature rise curve, the clay blank is kept at different temperature and humidity points for a certain period of time, so that the water content in the clay blank becomes lower and lower until the water content is ≤25%, at which point the drying process ends. The entire drying process takes 7-20 days. One of the drying temperature rise curves is as follows: the clay blank is dried for 4 days at ≤35℃ and 90% relative humidity, then dried for 3 days at ≤45℃ and 70% relative humidity, and then dried for 2 days at 50℃ and 40% relative humidity.

[0089] Furthermore, in S14, the temperature control parameters are between 55-65℃, the humidity drops from 40% to below 10%, and the residence time is generally ≥2 days. The drying time for the first and second drying is related to the final catalyst specifications. For example, the honeycomb catalyst mentioned above is a cuboid structure of 150mm*150mm*(200mm-1200mm). The catalyst industry names product specifications based on the number of holes on a 150mm side length of the cross section. For example, a 20-hole catalyst means that there are 20 uniform and consistent-sized holes on a 150mm side length, that is, 20*20 holes on a 150mm*150mm cross section.

[0090] Furthermore, in step S15, calcination is used to fully react and oxidize the organic matter in the preform, forming a catalyst with a rich porous structure and high mechanical strength. Simultaneously, the precursor salt containing active components decomposes into active catalyst components, such as ammonium metavanadate decomposing into V2O5. During this process, the calcination temperature must be maintained at 200-400℃ for a sufficiently long time, generally between 8-20 hours, to ensure the slow and complete decomposition and oxidation of the organic matter added in the previous process. The maximum calcination temperature is between 400-650℃, and within this temperature range, the catalyst residence time must be 10-20 hours. During the calcination heating process, the heating rate of the calcination furnace is ≤5℃ / min. After calcination, the catalyst is naturally cooled to room temperature in a tunnel kiln, thus obtaining the primary honeycomb catalyst.

[0091] In summary, this invention uses TiO2 or an added active component as the main material to prepare a primary honeycomb catalyst. Later, depending on the application scenario (differences in operating temperature and other conditions), active substances and additives are added to the primary honeycomb catalyst through impregnation or coating processes to form honeycomb catalyst products of different specifications, thereby improving catalyst manufacturing capacity.

[0092] Meanwhile, this invention uses a primary honeycomb catalyst as a catalyst carrier, and prepares active materials such as vanadium and tungsten into impregnation liquids or coating slurries by means of additives. Through impregnation or coating processes, the active materials are loaded onto the catalyst carrier, and then the catalyst product is formed through processes such as drying and calcination. A step concentration difference of active components is formed on the catalyst, thereby improving the denitrification efficiency of the catalyst and reducing costs.

[0093] Furthermore, by using the process and preparation method of this application, the above-mentioned active components, and not limited to the above-mentioned components, can be added to the catalyst product, which not only optimizes the denitrification performance of the catalyst, but also enables the catalyst to have a synergistic effect in treating pollutants such as CO.

[0094] Example 2, refer to Figures 3-11This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a preparation apparatus, which solves the problem of requiring personnel to add different ingredients according to the stirring time, including a method for preparing titanium-based honeycomb catalysts.

[0095] And, mixing tank 1; wherein, mixing tank 1 is used for the mixing and stirring step in the above-mentioned method for preparing titanium-based honeycomb catalyst.

[0096] And, the mixing component 2 includes a stirring rod 26 disposed on the bottom wall of the mixing tank 1 and a cleaning rod 28 disposed on the inner side wall of the mixing tank 1 and adapted to the inner side wall of the mixing tank 1; wherein, the stirring rod 26 is designed in two sets and is driven by the motor 22 to stir the material in the mixing tank 1, and the cleaning rod 28 is designed in a single set, and the outer wall of the cleaning rod 28 is adapted to the inner side wall of the mixing tank 1.

[0097] And the dispensing component 3 includes a drive component 31, a moving component 32 and a switching component 33;

[0098] The driving component 31 includes a first moving block 311 slidably connected to the inner wall of the mixing tank 1, a second moving block 312 slidably connected to the inside of the mixing tank 1, a transmission cylinder 315 disposed on the outside of the second moving block 312, a first guide groove 316 formed on the end face of the transmission cylinder 315, and a first guide shaft 319 mounted on the outer wall of the second moving block 312 and slidable along the first guide groove 316. The first moving block 311 is designed in multiple sets, with some parts needing to extend into the interior of the mixing tank 1. The two ends of the first moving block 311 extending into the interior of the mixing tank 1 are inclined to ensure that the first moving block 311 can retract into the mixing tank when the cleaning rod 28 rotates in both directions. Within 1, the contact surfaces of the first moving block 311 and the second moving block 312 are both at an inclined angle. The first guide shaft 319 is telescopically designed on the transmission cylinder 315. It should be noted that the transmission cylinder 315 is designed in two sets, symmetrically designed in the vertical direction with the first bevel gear 314 as the symmetrical point. The two transmission cylinders 315 with symmetrical design realize the opposite rotation direction of the drive shaft 325. The first guide groove 316 is composed of two straight grooves and two arc grooves. The upper and lower sides of the straight groove are connected to the beginning and end of the arc groove, thus forming a continuous guide groove. Furthermore, there needs to be a step at the contact point between the arc groove and the straight groove to ensure the unidirectional guidance of the first guide shaft 319, thereby realizing the unidirectional rotation of the transmission cylinder 315.

[0099] Furthermore, the moving part 32 includes a storage chamber 321 fixedly installed inside the mixing tank 1, a piston 323 installed on the outer wall of the storage chamber 321, a drive shaft 325 fixedly connected to the end face of the first bevel gear 314, and a sliding block 326 disposed on the outer wall of the drive shaft 325. The storage chamber 321 is designed in multiple groups according to the batching of ingredients required in the preparation method of titanium-based honeycomb catalyst. The piston 323 is also designed on the inner wall of the mixing tank 1 to facilitate the replenishment of ingredients. It should be noted that since some ingredients in this preparation method need to be stirred for a certain period of time before being added, the density of the thread grooves on the outer surface of the drive shaft 325 determines the moving speed of the sliding block 326. The density of the thread grooves on the surface of the drive shaft 325 at different positions cannot be the same. Specific ingredients are stored in the storage chamber 321 at different positions of the drive shaft 325.

[0100] Furthermore, the switching component 33 includes a movable rod 331 disposed on the outside of the piston 323, a movable plate 332 movably connected to the end face of the movable rod 331, a pressing plate 336 disposed on the outside of the transmission cylinder 315, and a locking plate 339 disposed on the outside of the movable plate 332. The movable rod 331 is rotatable and has movable plates 332 on its upper and lower sides to trigger the separation and engagement of the transmission cylinder 315 and the connecting shaft 3110 at different positions. The end of the movable plate 332 is inclined, with the inclined surface facing the drive shaft 325. The outer wall of the movable plate 332 needs to be concave on the side near the inclined surface to ensure sufficient space for the movable plate 332 to contact the pressing plate 336. It should be noted that the pressing plate 336 is connected to the mounting bracket 313 by a spring, and the side near the movable plate 332 is also designed with an inclined surface, and the two inclined surfaces are compatible.

[0101] The stirring operation is achieved by rotating the stirring rod 26 and the cleaning rod 28. At the same time, the cleaning rod 28 causes the transmission cylinder 315 to rotate, which in turn causes the drive shaft 325 to rotate synchronously. This causes the sliding block 326 to push the piston 323 to complete the feeding of materials at different positions. Meanwhile, the switching component 33 is used to complete the forward and reverse rotation of the drive shaft 325 and complete the reset of the sliding block 326.

[0102] Specifically, the mixing assembly 2 also includes a motor 22 fixedly installed inside the mixing tank 1 and a mounting base 21 fixedly connected to the output end of the motor 22. The mounting base 21 is provided with a driving wheel 23 and a driven wheel 24 inside, which are meshed together. A first connecting plate 25 is fixedly connected to the outer wall of the driven wheel 24. The stirring rod 26 is fixedly connected to the first connecting plate 25. A second connecting plate 27 is fixedly connected to the outer wall of the mounting base 21. A cleaning rod 28 is fixedly connected to the end of the second connecting plate 27. The motor 22 is fixedly installed inside the mixing tank 1. The motor 22 drives the mixing tank 1 to rotate synchronously. The driving wheel 23 is integrated with the fixed installation component of the motor 22 and always remains fixed. The driven wheel 24 is designed with two sets and fixedly connected to the mounting base 21. It is distributed on both sides of the driving wheel 23. The synchronous rotation of the mixing tank 1 and the driven wheel 24 drives the stirring rod 26 and the cleaning rod 28 to rotate synchronously, so as to achieve the mixing of the ingredients and the synchronous cleaning of the inner wall of the mixing tank 1.

[0103] Furthermore, the driving component 31 also includes a first spring 318 fixedly mounted on the upper surface of the second moving block 312 and a mounting bracket 313 fixedly connected inside the mixing tank 1. The outer wall of the mounting bracket 313 is rotatably connected to a first bevel gear 314, and the end of the first spring 318 is fixedly connected to the inner wall of the mixing tank 1. The mixing tank 1 requires a certain space for the movement of corresponding components. For example, the first moving block 311 and the second moving block 312 move horizontally and vertically within the mixing tank 1, respectively. The driving shaft 325 and the sliding block 326 also move horizontally. The upper surface of the second moving block 312 is connected to the inner wall of the mixing tank 1 via the first spring 318, thereby utilizing the elastic force of the first spring 318 to reset the second moving block 312. The mounting bracket 313 has a U-shaped structure, supporting the upper and lower transmission cylinders 315 and the first bevel gear 314.

[0104] Preferably, the transmission cylinder 315 is rotatably connected to the outer wall of the mounting bracket 313. A second bevel gear 317 is rotatably connected to the outer wall of the transmission cylinder 315. A connecting shaft 3110 is fixedly connected to the outer wall of the second bevel gear 317. The connecting shaft 3110 passes through the transmission cylinder 315, and the first bevel gear 314 and the second bevel gear 317 are meshed together. The second bevel gear 317 is located on adjacent sides of the end faces of the two transmission cylinders 315. The connecting shaft 3110 is provided on the outer wall of the second bevel gear 317. The connecting shaft 3110 is rotatably connected to the transmission cylinder 315 and extends to the outer side of the transmission cylinder 315.

[0105] The rest of the structure is the same as in Example 1.

[0106] When in use, after the raw materials and dissolved stearic acid are combined in the mixing tank 1 and stirring begins, the motor 22 is started. The motor 22 drives the mounting base 21 to rotate, and the mounting base 21 drives the two driven wheels 24 inside to rotate around the driving wheel 23, thereby causing the first connecting plate 25 and the second connecting plate 27 to rotate, realizing the synchronous rotation of the stirring rod 26 and the cleaning rod 28. While completing the material stirring operation, the cleaning rod 28 is also used to clean the mixing tank 1 by contacting the inner wall of the mixing tank 1.

[0107] As the cleaning rod 28 rotates and contacts the inclined surface of the first moving block 311, it moves inward toward the inside of the mixing tank 1, thereby driving the second moving block 312 to move upward in the vertical direction. The first spring 318 is compressed. During the movement of the second moving block 312, since the first guide shaft 319 has a telescopic sliding design and contacts the first guide groove 316, the transmission cylinder 315 rotates. Since the first guide groove 316 is composed of continuous arc grooves and straight grooves, the first guide shaft 319 can continuously drive the transmission cylinder 315 to complete the rotation. Furthermore, since there are steps between the arc grooves and straight grooves, the transmission cylinder 315 can only move in one direction. During the rotation, due to the influence of the switching component 33, one of the two transmission cylinders 315 on the upper and lower sides is connected to the connecting shaft 3110 and drives the second bevel gear 317 to rotate, while the other transmission cylinder 315 is separated from the connecting shaft 3110 and does not drive the second bevel gear 317 to rotate. At this time, the material needs to be fed by moving the sliding block 326. One set of transmission cylinders 315 drives the second bevel gear 317 on that side to rotate synchronously, which in turn drives the first bevel gear 314 to rotate synchronously. Since the drive shaft 325 is fixedly connected to the first bevel gear 314, the horizontal movement of the first moving block 311 can be converted into the driving power of the moving component 32.

[0108] In summary, the synchronous rotation of the stirring rod 26 and the cleaning rod 28 is used to stir the raw materials and clean the inner wall of the mixing tank 1, while providing power to the drive component 31. The single rotation cycle of the cleaning rod 28 is fixed. The single rotation of the cleaning rod 28 is converted into the continuous unidirectional rotation of the transmission cylinder 315, and then into the rotation of the drive shaft 325, which provides power for the start of the moving component 32.

[0109] Example 3, referring to Figures 9-13 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a method for dispensing materials into the storage cavity 321 using a sliding block 326 and a method for resetting the sliding block 326.

[0110] Specifically, the movable component 32 also includes a plug 322 installed on the outer wall of the storage cavity 321 and a guide rod 3215 fixedly connected to the outer wall of the mounting bracket 313. The guide rod 3215 passes through the sliding block 326 and its end is located on the outer wall of the storage cavity 321. A second spring 324 is fixedly installed on the outer wall of the piston 323. The end of the second spring 324 is fixedly connected to the outer wall of the storage cavity 321. A transmission ring 327 is rotatably connected to the inner wall of the sliding block 326. The transmission ring 327 is threadedly connected to the drive shaft 325. The outer wall of the transmission ring 327 is provided with a ring-shaped limiting groove 328. The sliding block 326 is guided and limited by the guide rod 3215 during its horizontal movement along the drive shaft 325 to ensure the certainty of the movement direction. The piston 323 is adapted to the inner wall of the storage chamber 321. The piston 323 uses air pressure to push out the ingredients in the storage chamber 321. The second spring 324 connects the piston 323 to the storage chamber 321. The spring force of the second spring 324 is used to reset the piston 323. The plug 322 is a detachable design to seal the storage chamber 321. Feeding channels are opened at the corresponding positions of the mixing tank 1 and each plug 322 to realize the replenishment of different ingredients.

[0111] Furthermore, a fixing block 3211 is provided on the outer wall of the sliding block 326. A third spring 3213 is fixedly connected to the lower end face of the fixing block 3211. A limiting plate 3212 that is adapted to the limiting groove 328 is fixedly connected to the end of the third spring 3213. A movable plate 329 is slidably connected to the outer wall of the sliding block 326. A second guide groove 3210 is opened at the center of the outer wall of the movable plate 329. A second guide shaft 3214 extending to the outside of the second guide groove 3210 is fixedly connected to the outer wall of the limiting plate 3212. The fixed block 3211 is in a fixed state, and the transmission ring 327 and the sliding block 326 are designed to be separate. The connection and separation of the transmission ring 327 and the sliding block 326 are achieved by the insertion and separation of the limiting plate 3212 and the limiting groove 328. The purpose of the multiple limiting grooves 328 is that after the transmission ring 327 rotates freely, the limiting plate 3212 can be locked into the nearest limiting groove 328 by the elastic force of the third spring 3213. Both ends of the movable plate 329 are inclined, and the second guide groove 3210 is V-shaped to allow the transmission ring 327 to rotate freely at the two edges of the drive shaft 325. In addition, the outer wall of the piston 323 needs to be opened to ensure that the movable plate 329 can pass through.

[0112] Preferably, the switching component 33 further includes a locking groove 337 formed on the outer wall of the connecting shaft 3110 and a fourth spring 338 fixedly connected to the outer wall of the locking groove 337. The end of the fourth spring 338 is fixedly connected to the outer wall of the locking plate 339. A third guide groove 333 is formed on the outer wall of the movable rod 331. A fixed rod 335 that can slide along the third guide groove 333 is fixedly connected to the end face of the piston 323. A rotating rod 334 is fixedly connected to the outer wall of the movable rod 331. The rotating rod 334 is rotatably connected to the inside of the mixing tank 1. The locking groove 337 is located on one side of the outer wall of the movable rod 331 and is not designed to penetrate through. The length of the locking groove 337 needs to be matched with the stroke of the piston 323. The position change of the piston 323 changes the rotation state of the two transmission cylinders 315. The moving plate 332 can slide horizontally along the inside of the mixing tank 1. The moving plate 332 and the movable rod 331 are movable. The rotation of the movable rod 331 around the rotating rod 334 has a driving effect, causing the upper and lower moving plates 332 to move in opposite directions, triggering the upper and lower transmission cylinders 315 to separate or connect with the outer wall connecting shaft 3110. The connecting shaft 3110 has an inner groove for the locking plate 339 to be inserted.

[0113] The rest of the structure is the same as in Example 2.

[0114] In use, the outer surface of the drive shaft 325 is provided with threaded grooves of varying density. The density of these grooves determines the moving speed of the sliding block 326. The moving speed of the sliding block 326 is then combined with the stirring time in different steps, and thus, the number of rotations of the cleaning rod 28. When the drive shaft 325 rotates under the transmission of the drive component 31, the transmission ring 327 is threadedly connected to the drive shaft 325. In this state, the sliding block 326 is located at the edge of the drive shaft 325 near the mounting bracket 313, the movable plate 329 contacts the outer wall of the mounting bracket 313, and the limiting plate 3212 separates from the limiting groove 328. As the drive shaft 325 rotates, the movable plate 329 moves away from the mounting bracket 313. The third spring 3213 pushes the limiting plate 3212 back into the nearest limiting groove 328. The sliding block 326 and the transmission ring 327 form a whole and move synchronously along the drive shaft 325 towards the side closer to the piston 323. When the sliding block 326 approaches the piston 323, the movable plate 329 passes through the piston 323. In the distance between the end of the movable plate 329 and the outer wall of the storage chamber 321, the sliding block 326 contacts the piston 323 and causes the piston 323 to move, thereby using air pressure to squeeze out the ingredients in the storage chamber 321 and send them into the mixing tank 1.

[0115] At this time, the movable plate 329 contacts the outer wall of the storage cavity 321. The movable plate 329 moves towards the side closer to the mounting bracket 313 relative to the sliding block 326. Limited by the second guide groove 3210, the second guide shaft 3214 and the limiting plate 3212 move upward, thereby separating the limiting plate 3212 from the limiting groove 328. At this time, as the drive shaft 325 continues to rotate, the transmission ring 327 rotates synchronously with the drive shaft 325. The sliding block 326 will not move. Thus, when the cleaning rod 28 continues to move and triggers feeding at other positions, the movable part 32 that has completed feeding is contacted by the movable plate 329 and the storage cavity 321 to realize the free rotation of the transmission ring 327, avoiding structural jamming.

[0116] As piston 323 moves from its initial position into storage chamber 321, piston 323 drives fixed rod 335 to drive movable rod 331 to rotate around rotating rod 334, thereby causing upper movable plate 332 to move closer to storage chamber 321. Lower movable plate 332 moves in the opposite direction to upper movable plate 332. Taking the movement trajectory of lower movable plate 332 as an example, when movable plate 332 moves, it approaches extrusion plate 336. As movable plate 332 and extrusion plate 336 come into contact with the inclined surface, extrusion plate 336 on that side moves closer to transmission cylinder 315. The pressing plate 336 presses the locking plate 339, and the locking plate 339 presses the fourth spring 338, thereby locking into the locking groove 337. The pressing plate 336, which is always above the transmission cylinder 315, ensures that the locking plate 339 is always inside the transmission cylinder 315 during the process. The locking plate 339 is used to connect the connecting shaft 3110 and the transmission cylinder 315, so that the two can rotate synchronously. Conversely, the upper locking plate 339 disengages from the transmission cylinder 315, so that the second bevel gear 317 on this side will not rotate when the transmission cylinder 315 rotates, thus completing the forward and reverse switching of the drive shaft 325.

[0117] In summary, by utilizing the drive shaft 325 with threaded grooves of varying density, when the rotation cycle of the cleaning rod 28 is fixed, the sliding blocks 326 at different positions will move towards the piston 323 at different speeds. This is coordinated with the addition of materials at different stirring times in the mixing step of the titanium-based honeycomb catalyst preparation method to complete automatic feeding. Furthermore, an idling structure is provided to allow the transmission ring 327 to idle when it reaches two extreme positions. This is combined with the movement position of the piston 323. When the piston 323 moves to a specific position, the feeding ends, the rotation direction of the drive shaft 325 is switched, and the moving part 32 is reset and idled at the extreme position to prepare for the next feeding.

[0118] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for preparing a titanium-based honeycomb catalyst, characterized in that: Includes the following steps; S1: Weigh all raw materials according to the catalyst ratio; S2: Dissolve stearic acid in warm water at 60-90℃: S3: Add titanium dioxide, deionized water from the workshop, stearic acid solution, and lactic acid to the mixer in sequence, and start stirring for 3-10 minutes; S4: Dissolve ammonium metavanadate in ethanolamine or oxalic acid to form a solution, add it to the above-mentioned mixer, and continue stirring; S5: Dissolve ammonium metatungstate or / and ammonium paratungstate in water or add directly to the mixer in the above steps, continue stirring for 20-40 minutes; S6: Add pulp fiber and / or pulp cotton and ammonia to the above-mentioned mixer and continue stirring; S7: Add glass fiber and / or silica sol and / or alumina sol, clay and / or silica and / or diatomaceous earth to the mixer in the above steps, control the pH value of the mud material between 7 and 9, and continue stirring for 1h-3h. S8: Observe the state of the mixed mud and test the moisture content and pH value of the mud. The moisture content should be between 23% and 29%, and the pH value should be between 6 and 9. S9: Stop mixing, discharge the material, transfer the mixed mud from the mixer to the hopper, and cover the hopper with a cloth; S10: Put the well-mixed mud from S9 into a kneader and knead for 0.5-5 hours to make the various components in the mud more evenly mixed together and remove large particles. S11: Place the clay obtained in S10 in a workshop with suitable temperature and humidity for a certain period of time to age it, so that the clay has better plasticity. S12: Add the mud material from S11 to the extruder. The extruder is equipped with molds of different specifications according to the product specifications. S13: Transfer the clay blanks from S12 to a constant temperature and humidity workshop, and cover the surface of the clay blanks with cardboard or cotton fabric, etc. S14: Transfer the clay blanks from S13 to the secondary drying chamber and continue drying to remove moisture from the clay blanks until the moisture content of the clay blanks is ≤10%; S15: The qualified green body after drying in S14 is transferred into a tunnel kiln for calcination, so that the organic matter in the green body can be fully reacted and oxidized, and a catalyst with rich porous structure and high mechanical strength is formed. S16: Prepare a solution of other active components and additives with deionized water in the workshop. Briefly place the primary catalyst obtained in S15 into the above solution. Control the final amount of active components loaded onto the primary catalyst by controlling the impregnation time, impregnation solution concentration, and number of impregnations. S17: Dry the primary catalyst obtained in S16 at a temperature between 30-120°C until the water content is ≤5%; S18: Place the primary catalyst from S17 in a calcination furnace and calcinate it for 0.5-3 hours. The maximum calcination temperature is 400-650℃. The resulting product is a titanium-based honeycomb catalyst.

2. The method for preparing the titanium-based honeycomb catalyst as described in claim 1, characterized in that: The kneading time of the clay in S10 is 0.5-5 hours, which allows the various components in the clay to be mixed more evenly, removing large particles while ensuring that the clay has a certain degree of plasticity; and, The aging time in S11 is 5-72 hours. Through capillary action, this allows the clay to have better plasticity, preventing problems such as uneven clay particle size or insufficient plasticity during subsequent foundation processes, which could lead to breakage of the extruded clay blank. Furthermore... In step S12, the extruder is equipped with molds of different specifications according to product specifications. The clay material is extruded under a pressure of 1-10 MPa to form a rectangular clay blank with a cross section of 150mm*150mm. Then, according to the requirements, it is cut with a wire cutting saw so that the length of the rectangular clay blank is between 100mm and 1200mm.

3. The method for preparing the titanium-based honeycomb catalyst as described in claim 2, characterized in that: In step S13, the surface of the clay blank is covered with cardboard or cotton fabric to ensure that the surface and inner layers of the clay blank do not lose water too quickly or with too large a difference in water loss rate, thus preventing cracking. During the first drying stage, the temperature is between 20-60℃ and the humidity is between 90%-25%. By setting a drying temperature rise curve, the clay blank is kept at different temperature and humidity points for a certain period of time, so that the water content in the clay blank gradually decreases until the water content is ≤25%, at which point the first drying stage ends. The entire drying process takes 7-20 days. One drying temperature rise curve is as follows: the clay blank is dried for 4 days at ≤35℃ and 90% relative humidity, then dried for 3 days at ≤45℃ and 70% relative humidity, and finally dried for 2 days at 50℃ and 40% relative humidity. In step S14, the temperature control parameters are between 55-65℃, the humidity drops from 40% to below 10%, and the residence time is generally ≥2 days. The drying times for the first and second drying stages are related to the final catalyst specifications. For example, the aforementioned honeycomb catalyst has a cuboid structure of 150mm*150mm*(200mm-1200mm). The catalyst industry names product specifications based on the number of holes on a 150mm side of the cross-section. For instance, a 20-hole catalyst means there are 20 uniform and identical-sized holes on a 150mm side, i.e., 20*20 holes on a 150mm*150mm cross-section. In step S15, calcination is used to fully react and oxidize the organic matter in the preform, forming a catalyst with a rich porous structure and high mechanical strength. Simultaneously, the precursor salt containing active components decomposes into active catalyst components, such as ammonium metavanadate decomposing into V2O5. During this process, the calcination temperature should be maintained at 200-400℃ for a sufficient duration, generally between 8-20 hours, to ensure the slow and complete decomposition and oxidation of the organic matter added in the previous process. The maximum calcination temperature is between 400-650℃, and within this temperature range, the catalyst residence time should be 10-20 hours. During the calcination heating process, the heating rate of the calcination furnace should be ≤5℃ / min. After calcination, the catalyst is naturally cooled to room temperature in a tunnel kiln, thus obtaining the primary honeycomb catalyst.

4. A preparation apparatus, characterized in that: Including the method for preparing the titanium-based honeycomb catalyst according to any one of claims 1 to 3; and, Mixing tank (1); and, The mixing assembly (2) includes a stirring rod (26) disposed on the bottom wall of the mixing tank (1) and a cleaning rod (28) disposed on the inner side wall of the mixing tank (1) and adapted to the inner side wall of the mixing tank (1); and, The dispensing assembly (3) includes a drive component (31), a moving component (32), and a switching component (33); wherein, The driving component (31) includes a first moving block (311) disposed on the inner wall of the mixing tank (1), a second moving block (312) disposed inside the mixing tank (1), a transmission cylinder (315) disposed on the outer side of the second moving block (312), a first guide groove (316) formed on the end face of the transmission cylinder (315), and a first guide shaft (319) disposed on the outer wall of the second moving block (312) and slidable along the first guide groove (316); and, The moving part (32) includes a storage chamber (321) disposed inside the mixing tank (1), a piston (323) disposed on the outer wall of the storage chamber (321), a drive shaft (325) disposed on the end face of the first bevel gear (314), and a sliding block (326) disposed on the outer wall of the drive shaft (325); and, The switching component (33) includes a movable rod (331) disposed outside the piston (323), a moving plate (332) disposed on the end face of the movable rod (331), a pressing plate (336) disposed outside the transmission cylinder (315), and a locking plate (339) disposed outside the moving plate (332); wherein, The stirring operation is achieved by rotating the stirring rod (26) and the cleaning rod (28). At the same time, the cleaning rod (28) causes the transmission cylinder (315) to rotate, which is synchronous with the rotation of the drive shaft (325). This causes the sliding block (326) to push the piston (323) to complete the feeding of materials at different positions. Meanwhile, the switching component (33) is used to complete the forward and reverse rotation of the drive shaft (325) and complete the reset of the sliding block (326).

5. The preparation apparatus as described in claim 4, characterized in that: The mixing assembly (2) also includes a motor (22) disposed inside the mixing tank (1) and a mounting base (21) disposed at the output end of the motor (22). The mounting base (21) is provided with a drive wheel (23) and a driven wheel (24) inside. The drive wheel (23) and the driven wheel (24) are meshed together. The outer wall of the driven wheel (24) is provided with a first connecting plate (25). The stirring rod (26) is fixedly connected to the first connecting plate (25). The outer wall of the mounting base (21) is provided with a second connecting plate (27). The cleaning rod (28) is disposed at the end of the second connecting plate (27).

6. The preparation apparatus as described in claim 5, characterized in that: The drive component (31) also includes a first spring (318) disposed on the upper end face of the second moving block (312) and a mounting bracket (313) disposed inside the mixing tank (1). The outer wall of the mounting bracket (313) is provided with a first bevel gear (314), and the end of the first spring (318) is disposed on the inner wall of the mixing tank (1).

7. The preparation apparatus according to claim 6, characterized in that: The transmission cylinder (315) is disposed on the outer wall of the mounting bracket (313). A second bevel gear (317) is disposed on the outer wall of the transmission cylinder (315). A connecting shaft (3110) is disposed on the outer wall of the second bevel gear (317). The connecting shaft (3110) passes through the transmission cylinder (315). The first bevel gear (314) and the second bevel gear (317) are meshed and connected.

8. The preparation apparatus according to claim 7, characterized in that: The moving part (32) further includes a plug (322) installed on the outer wall of the storage cavity (321) and a guide rod (3215) disposed on the outer wall of the mounting bracket (313). The guide rod (3215) passes through the sliding block (326) and its end is disposed on the outer wall of the storage cavity (321). The outer wall of the piston (323) is provided with a second spring (324), the end of which is disposed on the outer wall of the storage cavity (321). The inner wall of the sliding block (326) is provided with a transmission ring (327), which is threadedly connected to the drive shaft (325). The outer wall of the transmission ring (327) is provided with a limiting groove (328) distributed in an annular pattern.

9. The preparation apparatus as described in claim 8, characterized in that: The outer wall of the sliding block (326) is provided with a fixed block (3211), the lower end face of the fixed block (3211) is provided with a third spring (3213), the end of the third spring (3213) is provided with a limiting plate (3212) adapted to the limiting groove (328), the outer wall of the sliding block (326) is provided with a movable plate (329), the center of the outer wall of the movable plate (329) is provided with a second guide groove (3210), and the outer wall of the limiting plate (3212) is provided with a second guide shaft (3214) extending to the outside of the second guide groove (3210).

10. The preparation apparatus according to claim 9, characterized in that: The switching component (33) also includes a locking groove (337) formed on the outer wall of the connecting shaft (3110) and a fourth spring (338) formed on the outer wall of the locking groove (337). The end of the fourth spring (338) is formed on the outer wall of the locking plate (339). The outer wall of the movable rod (331) is provided with a third guide groove (333). The end face of the piston (323) is provided with a fixed rod (335) that can slide along the third guide groove (333). The outer wall of the movable rod (331) is provided with a rotating rod (334). The rotating rod (334) is rotatably connected to the inside of the mixing tank (1).

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