Preparation method of high-pressure homogeneous crushing catalyst raw material

Abstract

The invention relates to the technical field of crushing, and discloses a preparation method of a high-pressure homogeneous crushed catalyst raw material, which comprises the following steps: S1, raw material pretreatment: the raw material is solid powder, the raw material is firstly dispersed in a proper solvent to form a suspension, a proper amount of a dispersant is added, and preliminary dispersion is performed through stirring treatment; the powder is uniformly distributed in the solvent; s2, a homogenizing process: conveying the pretreated material to a high-pressure homogenizer with set parameters through a feeding pump, and crushing and refining larger particles in the material under the action of high pressure; a crushing part is arranged, suspension liquid firstly makes contact with a flow guide block, the suspension liquid enters a feeding cavity through a feeding pipe in the tangential direction, high-speed rotating vortexes are formed in the cavity, aggregate is thrown to the cavity wall and collides with the cavity wall to be crushed due to the centrifugal force effect, meanwhile, speed gradient exists in rotating fluid, shearing force is generated, and the fluid is crushed. And the aggregate is further torn.

Description

Technical Field

[0001] The invention relates to the technical field of crushing, and in particular to a method for preparing high-pressure homogenized crushed catalyst raw materials. Background Art

[0002] As catalytic technology develops in the direction of high efficiency, precision and greenness, high-pressure homogenization and crushing technology has broad prospects in the research and development of new catalysts and large-scale industrial production due to its excellent ability to optimize catalyst performance. In the catalyst preparation process, the use of high-pressure homogenization and crushing can significantly refine the particle size, so that the catalyst has a nanometer or submicron particle size, greatly improving the specific surface area and the number of active sites. At the same time, it can effectively improve the dispersion of active components, ensure that the active components are evenly distributed on the carrier and give full play to their effectiveness. It can also improve the microstructure, such as creating lattice defects, optimizing pore structure, etc. These advantages allow the catalyst to comprehensively improve activity, selectivity and stability.

[0003] Although the catalyst raw material particles in the suspension are dispersed in the liquid medium, the charges on the particle surface and the intermolecular forces will cause the particles to attract each other. When entering the feed pipeline of the high-pressure homogenizer, the large particles or agglomerates may block the feed pipeline, valves and other narrow channels, interrupt the homogenization process, and even damage the equipment due to the sudden increase in local pressure. The impact and friction on components such as the homogenization valve increase, accelerating the wear of components. In order to break up the agglomerates, the number of homogenization cycles must be increased or the pressure must be increased, which not only prolongs the homogenization time and reduces production efficiency, but also greatly increases energy consumption. In addition, the agglomerates cause uneven distribution of active components, affecting the activity and selectivity of the catalyst, and are prone to cause problems such as loss of active components and sintering of particles, reducing the stability and service life of the catalyst. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a method for preparing high-pressure homogenized crushed catalyst raw materials, which can effectively solve the problem that agglomerates existing in the suspension in the prior art easily clog narrow channels such as feed pipelines and valves.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The present invention provides a method for preparing a high-pressure homogenized and crushed catalyst raw material, comprising:

[0008] S1. Raw material pretreatment. The raw material is solid powder. The raw material needs to be dispersed in a suitable solvent to form a suspension. At the same time, an appropriate amount of dispersant is added and initially dispersed by stirring to ensure that the powder is evenly distributed in the solvent.

[0009] S2. Homogenization process: The pre-treated material is transported to the high-pressure homogenizer with set parameters through the feed pump. Under the action of high pressure, the material passes through the narrow gap of the homogenization valve. The strong shear force, impact force and cavitation effect work together to break and refine the larger particles;

[0010] S3. Separation and washing: The homogenized material is separated into solid and liquid by separation filtration to obtain a refined catalyst raw material solid;

[0011] S4. Drying and forming: The washed solid is dried in an oven;

[0012] The high-pressure homogenizer in S2 includes a homogenizer body, a discharge pipe is provided on one side of the homogenizer body for discharging the material after high-pressure treatment, and a feed part is provided on the other side of the homogenizer body for pouring the pre-treated material;

[0013] The feed part includes a feed cavity fixedly connected to one side of the homogenizer body, the inner cavity of the feed cavity is arranged into an upper and lower part, the upper cavity of the feed cavity is provided with a crushing member, the crushing member rotates to crush the suspension poured into the cavity, and the lower cavity of the feed cavity is provided with a filter, the filter filters the suspension after the preliminary crushing of the agglomerates, and ensures that only particles meeting the size requirements enter the interior of the homogenizer body;

[0014] Wherein, the outer wall of the filter element is sleeved with a track frame for adjusting the rotation speed of the filter element and maintaining stable rotation.

[0015] Furthermore, the feeding part also includes a tank cover detachably connected to the top of the feeding chamber, a motor is provided in the middle of the top of the tank cover for transmission connection with the top of the crushing member, a feeding pipe is provided on the side of the top of the tank cover for facilitating the suspension to enter the feeding chamber through a tangential direction, the crushing member includes a guide block fixedly connected to the output end of the motor, a crushing frame is fixedly connected to the bottom end of the guide block, the guide block is located in the internal cavity of the tank cover, the crushing frame is located in the internal cavity of the feeding chamber, and the area where the guide block and the crushing frame exist is a cyclone crushing chamber.

[0016] Furthermore, a connecting rod is fixedly connected to the middle part of the bottom end of the guide block, and the other end of the connecting rod is connected to the middle part of the top end of the filter element. The filter element includes filter screen one, filter screen two and filter screen three designed from top to bottom, and the apertures of filter screen one, filter screen two and filter screen three gradually decrease. A corrugated layer is provided on the lower surface of the filter screen, the upper and lower ends of filter screen two, and the upper surface of filter screen three, and the gap between two corrugated layers close to each other is smaller than the diameter of the aperture below.

[0017] Furthermore, the filter element also includes a sealing slideway opened on the edge of filter screen one, filter screen two and filter screen three, and the outer surface of the circular shaft of filter screen one, filter screen two and filter screen three is fixedly connected with a gear ring. The sealing slideway is arranged inside the track frame and is slidably sealed therewith.

[0018] Furthermore, the inner wall of the track frame is provided with limit grooves for limiting filter one, filter two and filter three respectively, and the side of the limit groove close to the center of the circle is fixedly connected with a limit ring that slides and seals with the sealing slideway, and the inner walls of the three limit grooves are symmetrically provided with linkage parts for adjusting the rotation speed of filter one, filter two and filter three.

[0019] Furthermore, the linkage part includes a gear shaft that passes through the track frame and is rotatably connected to three limit grooves, the part of the gear shaft located at the upper limit groove is fixedly connected to gear one, and the gear one is meshingly connected to the gear ring on the outer wall of filter one, the part of the gear shaft located at the middle limit groove is fixedly connected to gear two, and the gear two is meshingly connected to the gear ring on the outer wall of filter two, the part of the gear one located at the lower limit groove is fixedly connected to gear three, and the gear three is meshingly connected to the gear ring on the outer wall of filter three, and the gear number ratio of gear one, gear two and gear three is 2:3:4.

[0020] Furthermore, a crushing piece is arranged above the filter screen, one end of the crushing piece is sleeved on the bottom end of the outer wall of the connecting rod, the crushing piece includes a fixing plate whose tail end is fixed to the inner wall of the feed chamber, the connecting rod is rotatably connected at the other end of the fixing plate, a fixing groove is opened on the lower surface of the fixing plate, an elastic piece is arranged on the inner wall of the fixing groove, and a pressure plate is arranged on the lower surface of the elastic piece.

[0021] Furthermore, the pressure plate is designed with symmetrically inclined sides.

[0022] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0023] The present invention is provided with a crushing piece, and the suspension first contacts the guide block, and then enters the feed chamber through the feed pipe in a tangential direction, forming a high-speed rotating vortex in the chamber. Due to the centrifugal force, the agglomerates are thrown to the chamber wall, collide with the chamber wall and are broken. At the same time, there is a velocity gradient inside the rotating fluid, which generates shear force and further tears the agglomerates.

[0024] The present invention is provided with a filter element, wherein the top filter screen 1 is a coarse filter screen, which is used to intercept larger agglomerates and preliminarily reduce the size of the agglomerates; the middle filter screen 2 is a medium filter screen, which further filters smaller agglomerates; the bottom filter screen 3 is a fine filter screen, which ensures that only particles that meet the size requirements pass through, and the corrugated layer rotates with the rotation of the filter screens 1, 2 and 3, and the filter screens 3 interact with each other to tear the agglomerates into pieces, thereby enhancing the crushing effect, and the different rotation speeds between the filter screens 1, 2 and 3 generate relative motion to form shear force and friction force, thereby effectively crushing the agglomerates. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of a process for preparing catalyst raw materials according to an embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the separation of the feed chamber and the tank cover structure according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the internal structure of the feed chamber according to an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of the structure of the filter element according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the filter screen 2 according to an embodiment of the present invention;

[0032] Figure 7 A schematic diagram of the internal structure of a track frame according to an embodiment of the present invention;

[0033] Figure 8 The figure is a schematic diagram of the crushing part structure according to an embodiment of the present invention.

[0034] The numbers in the figure represent: 1. Homogenizer body; 2. Discharge pipe; 3. Feed part; 31. Feed chamber; 32. Tank cover; 33. Feed pipe; 35. Crushing part; 351. Guide block; 352. Crushing frame; 36. Connecting rod; 37. Filter element; 371. Filter screen one; 372. Filter screen two; 373. Filter screen three; 375. Corrugated layer; 376. Sealing slideway; 377. Gear ring; 38. Crushing part; 381. Fixed plate; 382. Fixed groove; 383. Elastic part; 385. Pressing plate; 5. Motor; 6. Track frame; 61. Limiting groove; 62. Gear shaft; 63. Gear one; 64. Gear two; 65. Gear three; 66. Limiting ring. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The present invention will be further described below in conjunction with the embodiments.

[0037] Example:

[0038] See also Figure 1-Figure 8 The present invention provides a technical solution for preparing a high-pressure homogenized and crushed catalyst raw material, comprising:

[0039] S1. Raw material pretreatment. The raw material is solid powder. The raw material needs to be dispersed in a suitable solvent to form a suspension. At the same time, an appropriate amount of dispersant is added and initially dispersed by stirring to ensure that the powder is evenly distributed in the solvent.

[0040] S2. Homogenization process: The pre-treated material is transported to the high-pressure homogenizer with set parameters through the feed pump. Under the action of high pressure, the material passes through the narrow gap of the homogenization valve. The strong shear force, impact force and cavitation effect work together to break and refine the larger particles;

[0041] S3. Separation and washing: The homogenized material is separated into solid and liquid by separation filtration to obtain a refined catalyst raw material solid;

[0042] S4. Drying and forming: The washed solid is dried in an oven;

[0043] refer to Figure 2 , Figure 3 and Figure 4The device comprises a homogenizer body 1, a discharge pipe 2 is arranged on one side of the homogenizer body 1 for discharging the material after high pressure treatment, a feed part 3 is arranged on the other side of the homogenizer body 1 for pouring the pre-treated material, the feed part 3 comprises a feed cavity 31 fixedly connected to one side of the homogenizer body 1, a tank cover 32 is detachably connected to the top of the feed cavity 31, the internal cavity of the feed cavity 31 is arranged into two parts, an upper and lower part, a crushing member 35 is arranged in the upper cavity of the feed cavity 31, the crushing member 35 rotates to crush the suspension poured into the cavity, a filter 37 is arranged in the lower cavity of the feed cavity 31, and the filter 37 is used to crush the suspension after the agglomerates are initially crushed The filtration process ensures that only particles that meet the size requirements enter the interior of the homogenizer body 1. The outer wall of the filter element 37 is sleeved with a track frame 6 for adjusting the rotation speed of the filter element 37 and maintaining stable rotation. The prepared suspension is poured into the feed chamber 31 through the feed pipe 33. The suspension first enters the cyclone crushing chamber where the crushing element 35 is located. The motor 5 is started to drive the guide block 351 and the crushing frame 352 to rotate synchronously. The poured suspension collides with the inner wall of the feed chamber 31 along the tangential direction of the guide block 351, and the agglomerates in the suspension are crushed under the combined action of the centrifugal force and shear force brought by the rotation of the guide block 351 and the crushing frame 352.

[0044] The crushing frame 352 fixedly connected to the bottom of the guide block 351 is composed of four guide frames symmetrically and evenly fixed to the bottom of the guide block 351. The guide frames are set in an inclined state. The inclined guide frames can change the flow direction of the suspension and guide the suspension to flow along a specific path, so that the suspension forms a more orderly and reasonable flow field in the equipment, avoiding the flow dead corner or short circuit phenomenon, ensuring that the suspension can fully interact with other components in the equipment, and improving the efficiency of the entire processing process;

[0045] The inclined setting of the guide frame causes more disturbances in the flow of the suspension, increasing the turbulence of the fluid. The turbulence can make the relative movement between the particles in the suspension and the liquid more intense, thereby promoting the dispersion and mixing of the particles in the liquid, making the properties of the suspension more uniform, which is beneficial to the subsequent processing process;

[0046] The centrifugal effect of the suspension is further enhanced by the cooperation of the guide block 351 and the crushing frame 352, so that the agglomerates in the suspension move more quickly to the edge of the device under the action of centrifugal force, so that the substances with different densities are better separated. The suspension containing agglomerate particles can make the agglomerate particles be more effectively thrown to the edge area of ​​the filter element 37, thereby improving the efficiency of solid-liquid separation.

[0047] In the subsequent filtering operation, the crushing frame 352 guides the suspension to flow to the filter element 37 at a suitable angle and speed, which helps to improve the filtering effect of the filter element 37. On the one hand, the suspension is more evenly distributed on the filter screen to avoid excessive local filtering load. On the other hand, the appropriate inclination angle can use the combined force of gravity and centrifugal force to make the filtrate pass through the filter element 37 more smoothly, and the solid particles are more easily trapped on the filter screen, thereby improving the filtration accuracy and speed. In addition, the crushing frame 352 plays a role in buffering the impact of the suspension to a certain extent. When the suspension enters the equipment at a high speed, the guide block 351 and the crushing frame 352 can first bear part of the impact force, reducing the direct impact of the suspension on other key components of the equipment, thereby protecting the equipment from damage caused by fluid impact and extending the service life of the equipment.

[0048] By guiding the suspension to form a stable flow pattern, the guide frame helps to reduce the fluctuations and instability of the flow field within the equipment. A stable flow field is essential for the normal operation of the equipment. It can reduce vibration and noise during the operation of the equipment, improve the stability and reliability of the equipment, and reduce equipment failures and safety hazards caused by unstable flow fields.

[0049] However, although the above-mentioned crushing element 35 can crush, it cannot guarantee complete crushing. Therefore, the present invention designs a filter element 37 to screen all the suspension entering the homogenizer body 1 before the suspension enters the homogenizer body 1, intercepting larger agglomerates to prevent them from entering the high-pressure homogenizer.

[0050] refer to Figure 4 , Figure 5 , Figure 6 and Figure 7The middle part of the bottom end of the guide block 351 is fixedly connected with a connecting rod 36, and the other end of the connecting rod 36 is connected to the middle part of the top end of the filter element 37. The filter element 37 includes a filter screen 1 371, a filter screen 2 372 and a filter screen 3 373 designed from top to bottom. The apertures of the filter screen 1 371, the filter screen 2 372 and the filter screen 3 373 gradually decrease. The lower surface of the filter screen 1 371, the upper and lower ends of the filter screen 2 372 and the upper surface of the filter screen 3 373 are all provided with a corrugated layer 375, and the corrugated layers 375 are close to each other. The gap between the two corrugated layers 375 is smaller than the diameter of the lower aperture. The filter element 37 also includes a sealing slide 376 opened on the edge of the filter screen 1 371, the filter screen 2 372 and the filter screen 3 373. The outer surface of the circular shaft of the filter screen 1 371, the filter screen 2 372 and the filter screen 3 373 is fixedly connected with a gear ring 377. The sealing slide 376 is arranged inside the track frame 6 and is slidably sealed therewith. The inner wall of the track frame 6 is provided with sealing grooves for the filter screen 1 371, the filter screen 2 372 and the filter screen 3 373. The limiting groove 61 for limiting the position of the limiting groove 61 is fixedly connected to the side of the limiting groove 61 near the center of the circle with a limiting ring 66 that is slidably sealed with the sealing slideway 376. The inner walls of the three limiting grooves 61 are symmetrically provided with linkage parts for adjusting the rotation speed of the filter screen 1 371, the filter screen 2 372 and the filter screen 3 373. The linkage parts include a gear shaft 62 that penetrates the track frame 6 and is rotatably connected to the three limiting grooves 61. The part of the gear shaft 62 located at the upper limiting groove 61 is fixedly connected to the gear 1 63. The gear 1 The gear 63 is meshed with the toothed ring 377 on the outer wall of the filter screen 1 371, the portion of the gear shaft 62 located at the middle limiting groove 61 is fixedly connected with gear 2 64, gear 2 64 is meshed with the toothed ring 377 on the outer wall of the filter screen 2 372, the portion of the gear 1 63 located at the lower limiting groove 61 is fixedly connected with gear 3 65, gear 3 65 is meshed with the toothed ring 377 on the outer wall of the filter screen 3 373, and the gear ratio of gear 1 63, gear 2 64 and gear 3 65 is 2:3:4.

[0051] After the initial crushing of the agglomerates, the suspension enters the filter element 37. The filter element 37 adopts a multi-stage composite structure. The apertures of filter screen 1 371, filter screen 2 372 and filter screen 372 designed from top to bottom gradually decrease. The top filter screen 1 371 is a coarse filter screen, which is used to intercept larger agglomerates and initially reduce the size of the agglomerates; the middle filter screen 2 372 is a medium filter screen, which further filters smaller agglomerates; the bottom filter screen 3 373 is a fine filter screen, which ensures that only particles that meet the size requirements pass through.

[0052] The motor 5 drives the crushing member 35 to rotate as a whole, the crushing member 35 drives the connecting rod 36 to rotate, the connecting rod 36 drives the filter screen 1 371 fixed thereto to rotate, the rotation of the filter screen 1 371 drives the sealing slide 376 and the gear ring 377 to rotate synchronously, the sealing slide 376 slides on the inner wall of the limit groove 61 and always maintains a sliding seal with the limit ring 66, the rotation of the gear ring 377 drives the gear 1 63 meshing therewith to rotate, the gear 1 63 is evenly and symmetrically arranged on the inner wall of the limit groove 61, and can transmit the force to the gear shaft 62 while ensuring the smooth rotation of the filter screen 1 371, the gear shaft 62 drives the gear 2 64 and the gear 3 65 to rotate synchronously under the force of the gear 1 63, and due to the different number of gears, the rotation speeds of the filter screen 1 371, the filter screen 2 372 and the filter screen 3 373 are different

[0053] The upper surfaces of the filter screen 2 372 and the filter screen 373 are designed with a corrugated layer 375 to increase their surface area. When the suspension passes through, the corrugated layer 375 can generate more shear force and friction force, making it easier to crush the agglomerates. At the same time, the corrugated layer 375 also improves its own pressure resistance to prevent the filter screen from being deformed too much under pressure.

[0054] The corrugated layer 375 rotates with the rotation of the filter screen 1 371, the filter screen 2 372 and the filter screen 3 373. The filter screen 3 373 interacts with each other to tear the agglomerates apart, thereby enhancing the crushing effect. The different rotation speeds of the filter screen 1 371, the filter screen 2 372 and the filter screen 3 373 generate relative motion to form shear force and friction force, thereby effectively crushing the agglomerates.

[0055] Under the combined effect of the centrifugal force and shear force of the crushing element 35, the agglomerates are mostly concentrated in the edge area of ​​the filter screen. At the same time, the shear force generated by the rotation of the filter element 37 makes the crushed agglomerates easier to move and concentrate to the edges of the filter screen 1 371, the filter screen 2 372 and the filter screen 3 373 under the action of the centrifugal force, ensuring that the intercepted agglomerates will not interfere with the entry speed of other suspensions.

[0056] During the rotation of the rotary filter screen 1 371, filter screen 2 372 and filter screen 3 373, relative motion will occur between the surfaces of the filter screen 1 371, filter screen 2 372 and filter screen 3 373 and the suspension, thereby exerting shear force on the particles and agglomerates in the suspension. This shear force can disperse the agglomerates and allow smaller particles to pass through the filter screen 1 371, filter screen 2 372 and filter screen 3 373, thereby improving the filtration accuracy and effect and making the filtrate purer.

[0057] The rotary filter screen 1 371, filter screen 2 372 and filter screen 3 373 can make the suspension evenly distributed on the surface of filter screen 1 371, filter screen 2 372 and filter screen 3 373, avoiding the situation where the local filtering load is too large or too small. Each part of filter screen 1 371, filter screen 2 372 and filter screen 3 373 can participate in the filtering process relatively evenly, thereby improving the overall filtering efficiency and effect and reducing the problem of uneven filtering caused by local blockage;

[0058] Fixed filter screen 1 371, filter screen 2 372 and filter screen 3 373 are prone to the phenomenon of particles bridging between filter holes, resulting in clogging of the filter holes. During the rotation process, the dynamic characteristics of rotating filter screen 1 371, filter screen 2 372 and filter screen 3 373 can destroy the bridging structure of particles, making it easier for particles to pass through filter screen 1 371, filter screen 2 372 and filter screen 3 373 or be taken away. Impurities and particles on the surface of filter screen 1 371, filter screen 2 372 and filter screen 3 373 are not easy to accumulate, so the filter holes are kept unobstructed. Under the action of centrifugal force, water flow scouring, etc., some impurities attached to filter screen 1 371, filter screen 2 372 and filter screen 3 373 will be thrown off or washed away, which plays a certain self-cleaning role, reduces the possibility of clogging of filter screen 1 371, filter screen 2 372 and filter screen 3 373, and prolongs the continuous working time of filter screen 1 371, filter screen 2 372 and filter screen 3 373.

[0059] Since each part of the rotary filter screen 371, filter screen 2 372 and filter screen 373 participates in the filtering and self-cleaning process evenly, the problem of severe local wear of the fixed filter screen 371, filter screen 2 372 and filter screen 3 373 due to excessive local force and excessive accumulation of impurities is avoided, so that the overall wear of the filter screen 371, filter screen 2 372 and filter screen 3 373 is more even, thereby extending the service life of the filter screen 1 371, filter screen 2 372 and filter screen 3 373. During operation, the rotary filter screen 1 371, filter screen 2 372 and filter screen 3 373 gradually adapt to the change in pressure by rotating, reducing the impact on the filter screen 1 371, filter screen 2 372 and filter screen 3 373 caused by sudden pressure changes, and reducing the risk of rupture or damage of the filter screen 1 371, filter screen 2 372 and filter screen 3 373.

[0060] Although the filter element 37 adopts a rotating multi-layer composite structure with different apertures, and can process the agglomerates intercepted on the upper surfaces of filter screen 2 372 and filter screen 3 373, the largest particles on the upper surface of filter screen 1 371 located at the top cannot be crushed. In view of this, the present invention sets a crushing piece 38 on the upper surface of filter screen 1 371 to squeeze and crush the particles intercepted on the upper surface of filter screen 1 371.

[0061] refer to Figure 4 and Figure 8A crushing piece 38 is arranged above the filter screen 371, and one end of the crushing piece 38 is sleeved on the bottom end of the outer wall of the connecting rod 36. The crushing piece 38 includes a fixing plate 381 whose tail end is fixed to the inner wall of the feed chamber 31. The connecting rod 36 is rotatably connected at the other end of the fixing plate 381. A fixing groove 382 is opened on the lower surface of the fixing plate 381, and an elastic piece 383 is arranged on the inner wall of the fixing groove 382. A pressing plate 385 is arranged on the lower surface of the elastic piece 383, and the pressing plate 385 adopts a design of symmetrical inclination of the side.

[0062] When the connecting rod 36 rotates to drive the filter screen 371 to rotate, the fixed plate 381 always maintains a fixed position under the limit of the inner wall of the feed chamber 31. The upper surface of the fixed plate 381 adopts an arc-shaped design to avoid the residue of agglomerates in the suspension. The pressure plate 385 is located above the filter screen 371. The gap between the two is smaller than the internal aperture size of the filter screen 371, and the side of the pressure plate 385 adopts a symmetrical inclined design. As the filter screen 371 rotates, the agglomerates remaining on its upper surface will contact the side of the pressure plate 385, and the agglomerates will be exerted under the action of the inclined surface to break them until the agglomerates fall into the upper surface of the filter screen 372.

[0063] The length of the pressure plate 385 is equal to the radius of the filtering area of ​​the filter 371. The pressure plate 385 performs crushing operations in the area from the center to the edge of the filter 371, which is more convenient to focus on the key filtering area of ​​the filter and effectively process the agglomerates from the center to the edge of the filter. Due to the coverage of the pressure plate 385, when dealing with some agglomerates that are relatively concentrated at the edge of the filter or in a specific area, it can be crushed more specifically to avoid excessive processing of other unnecessary areas, reduce energy consumption and unnecessary wear on the filter. Compared with the structure of the horizontal frame in the inner cavity, the pressure plate 385 generates relatively small inertia and torque during equipment operation, which is conducive to stable operation and control of the equipment.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing high-pressure homogenized and crushed catalyst raw materials, characterized in that: include: S1. Raw material pretreatment. The raw material is solid powder. The raw material needs to be dispersed in a suitable solvent to form a suspension. At the same time, an appropriate amount of dispersant is added and initially dispersed by stirring to ensure that the powder is evenly distributed in the solvent. S2. Homogenization process: The pre-treated material is transported to the high-pressure homogenizer with set parameters through the feed pump. Under the action of high pressure, the material passes through the narrow gap of the homogenization valve. The strong shear force, impact force and cavitation effect work together to break and refine the larger particles; S3. Separation and washing: The homogenized material is separated into solid and liquid by separation filtration to obtain a refined catalyst raw material solid; S4. Drying and forming: The washed solid is dried in an oven; The high-pressure homogenizer in S2 comprises a homogenizer body (1), one side of the homogenizer body (1) is provided with a discharge pipe (2) for discharging the material after high-pressure treatment, and the other side of the homogenizer body (1) is provided with a feed part (3) for injecting the pre-treated material; The feeding part (3) comprises a feeding cavity (31) fixedly connected to one side of the homogenizer body (1); the internal cavity of the feeding cavity (31) is arranged into an upper and lower part; the upper cavity of the feeding cavity (31) is provided with a crushing member (35); the crushing member (35) rotates to crush the suspension poured into the cavity; the lower cavity of the feeding cavity (31) is provided with a filter member (37); the filter member (37) filters the suspension after the agglomerates are preliminarily crushed, so as to ensure that only particles meeting the size requirements enter the interior of the homogenizer body (1); The outer wall of the filter element (37) is sleeved with a track frame (6) for adjusting the rotation speed of the filter element (37) and maintaining stable rotation.

2. The method for preparing a high-pressure homogenized and crushed catalyst raw material according to claim 1, characterized in that: The feeding part (3) further comprises a tank cover (32) detachably connected to the top of the feeding chamber (31); a motor (5) drivingly connected to the top of the crushing member (35) is arranged in the middle of the top of the tank cover (32); a feeding pipe (33) is provided on the side of the top of the tank cover (32) to facilitate the suspension to enter the feeding chamber (31) in a tangential direction; the crushing member (35) comprises a guide block (351) fixedly connected to the output end of the motor (5); a crushing frame (352) is fixedly connected to the bottom end of the guide block (351); the guide block (351) is located in the internal cavity of the tank cover (32); the crushing frame (352) is located in the internal cavity of the feeding chamber (31); and the area where the guide block (351) and the crushing frame (352) exist is a cyclone crushing chamber.

3. The method for preparing a high-pressure homogenized and crushed catalyst raw material according to claim 2, characterized in that: A connecting rod (36) is fixedly connected to the middle of the bottom end of the guide block (351), and the other end of the connecting rod (36) is connected to the middle of the top end of the filter element (37). The filter element (37) comprises a filter screen 1 (371), a filter screen 2 (372) and a filter screen 3 (373) which are designed in sequence from top to bottom. The apertures of the filter screen 1 (371), the filter screen 2 (372) and the filter screen 3 (373) gradually decrease. The lower surface of the filter screen 1 (371), the upper and lower ends of the filter screen 2 (372) and the upper surface of the filter screen 3 (373) are all provided with a corrugated layer (375), and the gap between two corrugated layers (375) close to each other is smaller than the diameter of the aperture below.

4. The method for preparing a high-pressure homogenized and crushed catalyst raw material according to claim 3, characterized in that: The filter element (37) further comprises a sealing slideway (376) provided on the edge of filter screen one (371), filter screen two (372) and filter screen three (373); the outer surface of the circular shaft of filter screen one (371), filter screen two (372) and filter screen three (373) is fixedly connected with a gear ring (377); the sealing slideway (376) is arranged inside the track frame (6) and is slidably sealed therewith.

5. The method for preparing a high-pressure homogenized and crushed catalyst raw material according to claim 4, characterized in that: The inner wall of the track frame (6) is provided with limiting grooves (61) for limiting the positions of filter screen 1 (371), filter screen 2 (372) and filter screen 3 (373) respectively; the side of the limiting groove (61) close to the center of the circle is fixedly connected with a limiting ring (66) for sliding sealing with the sealing slideway (376); the inner walls of the three limiting grooves (61) are symmetrically provided with linkage parts for adjusting the rotation speeds of filter screen 1 (371), filter screen 2 (372) and filter screen 3 (373).

6. The method for preparing a high-pressure homogenized and crushed catalyst raw material according to claim 5, characterized in that: The linkage member comprises a gear shaft (62) penetrating the track frame (6) and rotatably connected to the three limit grooves (61); the portion of the gear shaft (62) located at the upper limit groove (61) is fixedly connected to a gear one (63); the gear one (63) is meshingly connected to a toothed ring (377) on the outer wall of the filter screen one (371); the portion of the gear shaft (62) located at the middle limit groove (61) is fixedly connected to a gear two (64); the gear two (64) is meshingly connected to a toothed ring (377) on the outer wall of the filter screen two (372); the portion of the gear one (63) located at the lower limit groove (61) is fixedly connected to a gear three (65); the gear three (65) is meshingly connected to a toothed ring (377) on the outer wall of the filter screen three (373); the gear number ratio of the gear one (63), the gear two (64) and the gear three (65) is 2:3:

4.

7. The method for preparing a high-pressure homogenized and crushed catalyst raw material according to claim 3, characterized in that: A crushing piece (38) is arranged above the filter screen (371), one end of the crushing piece (38) is sleeved on the bottom end of the outer wall of the connecting rod (36), the crushing piece (38) includes a fixing plate (381) whose tail end is fixed to the inner wall of the feed chamber (31), the connecting rod (36) is rotatably connected to the other end of the fixing plate (381), a fixing groove (382) is opened on the lower surface of the fixing plate (381), an elastic piece (383) is arranged on the inner wall of the fixing groove (382), and a pressure plate (385) is arranged on the lower surface of the elastic piece (383).

8. The method for preparing a high-pressure homogenized and crushed catalyst raw material according to claim 7, characterized in that: The pressing plate (385) is designed with symmetrically inclined sides.

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