Preparation device for nanoscale hierarchical pore ZSM-5 molecular sieve and use method thereof

Abstract

The invention relates to the technical field of molecular sieve manufacturing equipment, in particular to a preparation device for a nanoscale hierarchical pore ZSM-5 molecular sieve and a using method thereof.The preparation device comprises a feeding module connected with a cleaning device, a drying module is arranged at the discharging end of the feeding module, and the feeding module comprises an obliquely-arranged mounting frame; a first sieve plate and a second sieve plate are sequentially arranged in the mounting frame in the conveying direction of materials, a water collecting bin is arranged below the mounting frame, the materials can be directly conveyed through the feeding module after cleaning is completed, pre-drying treatment is not needed, the process of drying operation is simplified, the drying efficiency is improved, and the drying efficiency is improved. And therefore, the overall production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of molecular sieve manufacturing equipment, and in particular to a preparation device for nano-scale multi-level pore ZSM-5 molecular sieve and a use method thereof. Background Art

[0002] ZSM-5 molecular sieve has a three-dimensional cross-pore structure with a silicon-aluminum ratio ranging from 24 to infinity. It has good thermal stability, a high specific surface area, and adjustable acidity. It is widely used in petrochemicals, coal chemical industry, environmental governance and other fields.

[0003] At present, the production of ZSM-5 tends to be nano-sized, multi-level porous, core-shell structure, etc., in order to meet the requirements of improving reaction activity, improving diffusion mass transfer efficiency or specific performance requirements.

[0004] Chinese patent CN113428904B patent document proposes a magnetic ZSM-5 zeolite molecular sieve and a preparation method thereof. The preparation method obtains a hollow ZSM-5 zeolite molecular sieve with a cavity by alkaline etching, and then injects iron salt into the cavity to obtain a magnetic ZSM-5 zeolite molecular sieve.

[0005] In this scheme, the production of molecular sieve is divided into two steps. First, ZSM-5 zeolite molecular sieve is taken for alkaline etching to obtain a hollow ZSM-5 zeolite molecular sieve with a cavity; then iron salt is poured into the cavity of the obtained hollow ZSM-5 zeolite molecular sieve, i.e., a magnetic ZSM-5 zeolite molecular sieve is obtained. The magnetic ZSM-5 zeolite molecular sieve has a core-shell structure. In practical applications, the connection between the two steps requires the molecular sieve to be cleaned, and it needs to be dried after the cleaning is completed. Existing drying equipment such as China Patent CN220119756U discloses a molecular sieve forming drying mechanism, including a drying box, both sides of the inner wall of the drying box are fixedly installed with a bearing mechanism, and the opposite sides of the two groups of the bearing mechanisms are connected with a placement mechanism larger than the molecular sieve for carrying, and the inner wall of the drying box is fixedly installed with a driving mechanism for driving the bearing mechanism to rotate, and the top of the drying box is fixedly installed with a drying mechanism. The utility model can place the molecular sieve and the containing plate after washing therein by arranging a placing mechanism, and then drive the driving mechanism to operate. The operation of the driving mechanism can drive the carrying mechanism to rotate continuously, and the continuously rotating carrying mechanism can drive the placing mechanism to continuously move toward the drying mechanism on the top. Such an arrangement can ensure that the placing mechanism drives the molecular sieve to continuously move toward the drying mechanism that provides a heat source, thereby ensuring sufficient drying. Although this equipment can be used for drying operations, the materials that need to be washed need to be drained, transferred, spread, etc., and then heated and dried.

[0006] This results in the need for multiple steps to be coordinated during drying, which will seriously affect production efficiency for the magnetic ZSM-5 zeolite molecular sieve that requires two operating procedures.

[0007] In addition, for nano-scale multi-level pore ZSM-5 molecular sieve, due to the small crystal size, the filter cake obtained in the actual production filter pressing and washing process has a high water content, which will form a "non-Newtonian fluid" phenomenon. Ordinary flash drying equipment cannot meet the drying requirements of this product. Therefore, it is urgent to design a drying equipment that can meet the requirements of nano-scale multi-level pore ZSM-5 molecular sieve. Summary of the invention

[0008] In order to solve the above problems, the embodiments of the present invention provide a preparation device for nano-scale multi-level pore ZSM-5 molecular sieve and a method for using the same, which are used to improve the drying efficiency and play a screening role in the drying process, thereby simplifying the production steps of molecular sieves, especially nano-scale multi-level pore ZSM-5 molecular sieves, thereby achieving the purpose of improving production efficiency.

[0009] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical scheme: a preparation device for nano-scale multi-level pore ZSM-5 molecular sieve, comprising a feeding module connected to a cleaning device, a drying module is arranged at the discharge end of the feeding module, the feeding module comprises an inclined mounting frame, a first sieve plate and a second sieve plate are arranged in sequence along the conveying direction of the material in the mounting frame, a water collecting bin is arranged below the mounting frame, the drying module comprises a base, an inclined drying cylinder is arranged on the base, a driving assembly for driving the drying cylinder to rotate is arranged outside the drying cylinder, a drying chamber connected to the feeding module is arranged at the upper part of the drying cylinder, a water collecting chamber is arranged at the lower part, a partition is arranged between the drying chamber and the water collecting chamber, and a heating assembly is arranged in the drying chamber.

[0010] As a further improvement of the above technical solution: The heating assembly includes a mounting frame arranged on the upper part of the drying chamber, one end of the mounting frame is connected to the base, and the other end is provided with a drying tube group and a dehumidification device. A hot air blower connected to the drying tube group is arranged on the base.

[0011] The drying pipe group includes a first hot air pipe blowing toward the material and a second hot air pipe blowing toward the inner wall of the drying chamber.

[0012] The inner wall of the drying chamber is provided with a material-push-out ridge, the number of the material-push-out ridges is multiple, and a drainage groove is provided between two adjacent material-push-out ridges. The inner wall of the water collecting chamber is provided with a guide groove connected with the drainage groove. The partition is provided with a filter mesh, and the diameter of the filter mesh is the same as the diameter of the sieve holes on the first sieve plate and the second sieve plate.

[0013] The surfaces of the material-shifting ridges and the drain grooves are provided with a hydrophobic layer.

[0014] A vibration block is disposed at the lower part of each of the first sieve plate and the second sieve plate, a transmission rod is disposed at the middle part of the vibration block, and a driving source connected to the transmission rod is disposed at the outer side of the mounting frame.

[0015] The inclination angle of the first screen plate is 15-30 degrees, and a material blocking strip is arranged on the upper surface of the first screen plate. The material blocking strip is arc-shaped and the top of the arc coincides with the center line of the first screen plate.

[0016] The inclination angle of the second sieve plate is 30-45 degrees, a material leveling plate is arranged above the second sieve plate, and a material discharge gap is arranged between the material leveling plate and the second sieve plate.

[0017] The height of the material discharge gap increases gradually from the middle of the second screen plate to both ends, and a material discharge port corresponding to the position of the material leveling plate is arranged on the side wall of the mounting frame.

[0018] A method for using a device for preparing nanoscale multi-level pore ZSM-5 molecular sieves, comprising the following steps: Step 1: Connect the feed module to the discharge end of the cleaning device through a conveying pipeline; Step 2: After the material enters the feed module through the self-cleaning device, it first rolls down along the first screen plate, achieving the first solid-liquid separation during the rolling process, and blocking the material with a smaller particle size under the action of the blocking bar; Step 3: The material enters the second screen plate and continues to roll downward. During the rolling process, the material with qualified particle size continues to fall through the material discharge gap, and the material with larger particle size rolls along the material leveling plate to the discharge port for discharge; Step 4: The material flows in the feeding module. When the material accumulates or falls slowly, the driving source is turned on and the vibration device starts to work to assist the falling of the material. Step 5: After the material enters the drying cylinder, the drying tube group and the dehumidification device start to work to dry the material. During the drying operation, the residual moisture on the surface of the material flows through the drain trough to the water collection chamber, and the water vapor is extracted by the dehumidification device until the drying operation is completed; Step 6: After the drying operation is completed, the material is transferred to the outside of the drying cylinder for standby use.

[0019] The beneficial effects of the present invention are as follows: the preparation device for nano-scale multi-level pore ZSM-5 molecular sieve comprises a feed module connected to a cleaning device, a drying module is arranged at the discharge end of the feed module, the feed module comprises an inclined mounting frame, a first sieve plate and a second sieve plate are sequentially arranged in the mounting frame along the conveying direction of the material, a water collecting bin is arranged below the mounting frame, and the material can be directly conveyed through the feed module after the cleaning is completed without pre-drying treatment, thereby simplifying the process of the drying operation, improving the drying efficiency, and thus realizing the improvement of the overall production efficiency; The design of the first sieve plate and the second sieve plate can screen the materials while draining, and remove materials with smaller diameters or exceeding the standard, to ensure that the materials targeted by the drying operation are all compliant materials, avoid unnecessary energy consumption of non-compliant materials during drying, and play a role in energy saving. In addition, through the screening of the feed module, it can also prevent bad materials from being worn by other materials in subsequent operations and affecting the overall production yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 It is a structural schematic diagram of the drying tube group in the present invention; Figure 4 It is a structural schematic diagram of the feeding module in the present invention; Figure 5 It is a side view of the feed module in the present invention (the mounting frame on one side is omitted); Figure 6 It is a structural schematic diagram of the drying cylinder in the present invention; Figure 7 It is a cross-sectional view of the drying cylinder in the present invention; Figure 8 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Fig. 9 This is a schematic diagram of the installation structure of the dryer in Example 2; Fig.10 This is a side view of the feed module in Example 2 (the mounting frame on one side is omitted).

[0021] In the figure: 1. mounting frame; 2. first sieve plate; 3. second sieve plate; 4. water collecting bin; 5. base; 6. drying cylinder; 7. drying chamber; 8. water collecting chamber; 9. partition; 10. mounting frame; 11. hot air blower; 12. first hot air pipe; 13. second hot air pipe; 14. material shifting ridge; 15. drain trough; 16. guide trough; 17. filter mesh; 18. material blocking strip; 19. material leveling plate; 20. material discharge gap; 21. discharge port; 22. driving source; 23. hydrophobic layer; 24. vibration block; 25. transmission rod; 26. air outlet; 27. blowing pipe; 28. dehumidification pipe; 29. ​​circulation pump; 30. dryer; 31. temperature and humidity sensor 1; 32. temperature and humidity sensor 2; 33. adjustment bracket; 34. water retaining extension plate; 35. purge pipe. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0023] like Figure 1-7 As shown, the preparation device for nano-scale multi-level pore ZSM-5 molecular sieve of this embodiment includes a feed module connected to a cleaning device, a discharge end of the feed module is connected to a drying module, the feed module includes an inclined mounting frame 1, a first sieve plate 2 and a second sieve plate 3 are sequentially mounted in the mounting frame 1 along the conveying direction of the material, and a water collection bin 4 is installed below the mounting frame 1; The drying module includes a base 5, on which a drying cylinder 6 is obliquely installed, and the inclination angle of the drying cylinder 6 is 30-45 degrees. A driving assembly for driving the drying cylinder 6 to rotate is installed on the outside of the drying cylinder 6, and the driving assembly includes a driven gear plate sleeved in the middle of the drying cylinder 6, and a driving motor is installed on the base 5. A driving gear meshing with the driven gear plate is installed at the output end of the driving motor. Bearing seats connected to the base 5 are provided at both ends of the drying cylinder 6. A drying chamber 7 connected to the feeding module is provided at the upper part of the drying cylinder 6, and a discharge port is provided on the side wall of the drying chamber 7. A water collecting chamber 8 is provided at the lower part of the drying cylinder 6, and a water supply pipeline connected to the water collecting bin 4 is provided at the bottom of the water collecting chamber 8. A partition 9 is provided between the drying chamber 7 and the water collecting chamber 8. A heating assembly is provided in the drying chamber 7, and the heating assembly is used to dry the material; After the material is cleaned, it is directly transported to the feeding module in the state of a mixture of cleaning liquid and molecular sieve. Compared with the conventional drying method, there is no need for cleaning, salvaging, transportation, and spreading. Solid-liquid separation is directly performed when passing through the feeding module, and the cleaning liquid in the mixed material is screened out to drain the water. The main function of the first sieve plate 2 here is to screen out most of the cleaning liquid and materials and impurities with smaller particle sizes. The function of the second sieve plate 3 is to screen out the obvious water adhering to the surface of the material by rolling the material. The water content on the surface of the material is reduced through two screening processes to prepare for subsequent drying, and then the material enters the drying chamber 7. During the drying operation, the drying cylinder 6 is in a rotating state, so that the material is constantly turning over, and the water adhering to the surface of the material and the inside of the material can be thrown out. Then the drying component provides high temperature to thoroughly dry the material.

[0024] The heating assembly includes a mounting frame 10 installed on the upper part of the drying chamber 7. One end of the mounting frame 10 is rotatably connected to the base 5 by a cantilever, and the height of the mounting frame 10 can be adjusted to thereby change the distance between the hot air and the material and improve the heat transfer efficiency. A drying pipe group and a dehumidification device are installed at the other end. A hot air blower 11 connected to the drying pipe group is installed on the base 5. The drying pipe group provides hot air for drying the material. The function of the dehumidification device is to extract water vapor out of the drying cylinder 6 to prevent the accumulation of water vapor from affecting the drying operation.

[0025] The drying pipe group includes a first hot air pipe 12 blowing toward the material and a second hot air pipe 13 blowing toward the inner wall of the drying chamber 7. The hot air blower 11 is connected to the second hot air pipe 13 through a pipeline. The side wall of the second hot air pipe 13 is provided with a through hole connected to the first hot air pipe 12. When in operation, the hot air blower 11 blows hot air to the second hot air pipe 13 and distributes part of the air volume to the first hot air pipe 12 through the through hole. The first hot air pipe 12 is an arc pipe, and the arc length is 1 / 3 of the circumference of the drying chamber 7. / 2, located in the middle above the drying chamber 7, the lower surface of the first hot air pipe 12 is provided with an air outlet 26, the number of the air outlet 26 is multiple, each air outlet 26 is installed inwardly inclined, and the angle formed with the center line of the first hot air pipe 12 is 0-5 degrees. Since the drying cylinder 6 is designed to be inclined, the materials will gather in the middle position of the bottom in the drying chamber 7. The inclined air outlet 26 will gather the hot air inward to the material accumulation place when blowing, thereby improving the heat transfer efficiency and wind speed, thereby improving the drying effect. In order to improve the drying efficiency, the second hot air duct 13 is installed along the depth direction of the drying chamber 7, and a plurality of arc-shaped blowing pipes 27 distributed along the length direction of the second hot air duct 13 are provided on one side of the inner wall of the drying chamber 7. The outlet position of each blowing pipe 27 is an oblique cutting design. The air outlet direction of the arc-shaped blowing pipe 27 is opposite to the rotation direction of the drying cylinder 6. When blowing, a heat flow layer can be formed on the inner wall of the drying chamber 7 to enhance the drying effect on the inner wall of the drying chamber 7. Through the design of the first hot air duct 12 and the second hot air duct 13, the material and the side wall of the drying chamber 7 can be dried with hot air synchronously, and the moisture adhered to the side wall of the drying chamber 7 can be evaporated while the material is being dried. The effect is, firstly, to prevent the moisture on the side wall of the drying chamber 7 from contacting the material again with the rotation of the drying cylinder 6 and affecting the drying efficiency; secondly, when the dried side wall rotates to the material accumulation area again, the moisture can be adhered to again and then evaporated by hot air when it rotates again, so as to finally achieve the purpose of improving the drying efficiency.

[0026] The dehumidification device adopts a dehumidification pipe 28. A fixing seat for fixing the dehumidification pipe 28 is provided on the mounting frame 10. A circulating pump 29 connected to the dehumidification pipe 28 is provided on the base 5. The circulating pump 29 is used to extract the water vapor in the drying chamber 7. The installation position of the dehumidification pipe 28 is located on the side away from the air outlet direction of the second hot air pipe 13 and the air inlet faces the material to avoid interference with the hot air.

[0027] The inner wall of the drying chamber 7 is provided with a material-prying rib 14, and the number of the material-prying ribs 14 is multiple, and a drain groove 15 is provided between two adjacent material-prying ribs 14, and a guide groove 16 connected with the drain groove 15 is opened on the inner wall of the water collecting chamber 8, and a filter mesh 17 is provided on the partition plate 9. The diameter of the filter mesh 17 is the same as the diameter of the sieve holes on the first sieve plate 2 and the second sieve plate 3. The design of the material-prying rib 14 can break up the material during the rotation of the drying cylinder 6, increase the gap between the materials, and improve the penetration ability of the hot air, thereby improving the utilization of thermal efficiency and the drying efficiency. When the material is tumbling, the moisture adhered to the surface of the material will contact the inner wall of the drying chamber 7. After the moisture condenses, it will flow along the drain groove 15 to the guide groove 16, and finally collected in the water collecting chamber 8. The bottom of the water collecting chamber 8 is provided with a drainage pipe connected to the water collecting bin 4.

[0028] A hydrophobic layer 23 is provided on the surface of the material-selecting ridge 14 and the drain groove 15. The ZSM-5 molecular sieve produced in the present invention is a zeolite molecular sieve, and the molecular sieve itself is a hydrophobic material. The hydrophobic layer 23 coated on the drying chamber 7 can cooperate with the molecular sieve itself. In the process of the molecular sieve rotating with the drying cylinder 6, the design of the hydrophobic layer 23 can facilitate the water to gather in the drain groove 15 and flow downward, thereby improving the material's ability to remove water.

[0029] A vibration block 24 is installed at the lower part of the first sieve plate 2 and the second sieve plate 3. The vibration block 24 adopts an eccentric block. A transmission rod 25 is provided in the middle of the vibration block 24. A driving source 22 connected to the transmission rod 25 is provided on the outer side of the mounting frame 1. The driving source 22 adopts a motor. The motor is connected to one of the transmission rods 25. Pulleys are provided on the two transmission rods 25. The linkage of the two transmission rods 25 is realized by the pulleys. Wear-resistant plates corresponding to the positions of the vibration blocks 24 are provided on the first sieve plate 2 and the second sieve plate 3. Through the design of the vibration block 24, the sliding of the material can be accelerated by vibration to avoid the phenomenon of material accumulation.

[0030] The inclination angle of the first sieve plate 2 is 15-30 degrees. The smaller inclination angle can prolong the residence time of the material on the first sieve plate 2 and improve the drainage effect. The upper surface of the first sieve plate 2 is provided with a material blocking strip 18. The height of the material blocking strip 18 is less than the height of the material. Taking the spherical molecular sieve as an example, the height of the material blocking strip 18 is less than 1 / 2 of the diameter of the molecular sieve, which can intercept materials or impurities with smaller particle sizes during the rolling of the material. The material blocking strip 18 is arc-shaped and the top of the arc coincides with the center line of the first sieve plate 2. The arc-shaped material blocking strip 18 can move the intercepted impurities to both sides under the action of water flow, and fall to the bottom of the first sieve plate 2 during the movement and fall into the water collection bin 4.

[0031] The inclination angle of the second sieve plate 3 is 30-45 degrees. The inclination angle of the second sieve plate 3 increases because the moisture in the material decreases, and the inclination angle needs to be increased to facilitate the falling of the material. A material leveling plate 19 is installed above the second sieve plate 3. A material discharge gap 20 is provided between the material leveling plate 19 and the second sieve plate 3. The material discharge gap 20 is slightly larger than the height of the molecular sieve. The height of the material discharge gap 20 gradually increases from the middle of the second sieve plate 3 to both ends. A discharge port 21 corresponding to the position of the material leveling plate 19 is provided on the side wall of the mounting frame 1. When the material has a larger diameter, it can intercept the material, and then guide it to the discharge port 21 through the material leveling plate 19. The height of the material gap 20 gradually increases from the middle of the second sieve plate 3 to the outside. For example, if the diameter of the compliant molecular sieve is set to 5mm±0.2, the height of the material gap 20 in the middle of the second sieve plate 3 is 4.8mm, and that at the edge is 5.2mm. The purpose of this design is to improve the material leveling effect and avoid the material from gathering in the middle of the second sieve plate 3, which makes it difficult for water on the surface of the molecular sieve to evaporate.

[0032] The method for using the device for preparing nano-scale multi-level pore ZSM-5 molecular sieve of this embodiment comprises the following steps: Step 1, connecting the feed module and the discharge end of the cleaning device through a conveying pipeline; Step 2: After the material enters the feed module from the self-cleaning device, it first rolls downward along the first screen plate 2, and the first solid-liquid separation is achieved during the rolling process, and the material with a smaller particle size is blocked by the blocking bar 18; Step 3: The material enters the second sieve plate 3 and continues to roll downward. During the rolling process, the material with a qualified particle size continues to fall through the material discharge gap 20, and the material with a larger particle size rolls along the material leveling plate 19 to the discharge port 21 and is discharged; Step 4: The material circulates in the feeding module. When the material accumulates or falls slowly, the driving source 22 is turned on and the vibration device starts to work to assist the falling of the material. Step 5: After the material enters the drying cylinder 6, the drying tube group and the dehumidification device start to work to dry the material. During the drying operation, the residual moisture on the surface of the material flows through the drain trough 15 to the water collection chamber 8, and the water vapor is extracted by the dehumidification device until the drying operation is completed; Step six, after the drying operation is completed, the material is transferred to the outside of the drying cylinder 6 for standby use.

[0033] Example 2 The same as Example 1 is not repeated here, except that: Figure 8-10As shown, after the dehumidification pipe 28 is connected to the circulation pump 29, the circulation pipe is connected to the output end of the circulation pump 29. In this embodiment, a gap is reserved between the first sieve plate 2 and the second sieve plate 3, and an adjustment bracket 33 is installed in the gap. A purge pipe 35 connected to the circulation pipe is installed on the adjustment bracket 33. The function of the purge pipe 35 is to recover the heat extracted in the drying chamber 7 and purge the material rolling on the second sieve plate 3. The functions are: 1. to provide additional power for the falling of the material, and 2. to dry the moisture on the surface of the molecular sieve by heat recovery. A dryer 30 needs to be installed on the dehumidification pipe 28 to absorb moisture in the recovered air and ensure that the gas in the purge pipe 35 is dry. A temperature and humidity sensor 31 is installed at the air inlet of the dryer 30, and a temperature and humidity sensor 32 is installed at the air outlet. The function of the temperature and humidity sensor 31 is to detect the temperature and humidity of the extracted gas to determine the dryness of the material. The function of the temperature and humidity sensor 32 is to detect the temperature and humidity of the return gas passing through the dryer 30 to avoid excessive humidity of the return gas, which affects the drying process on the surface of the material. A water retaining extension plate 34 connected to the lower surface of the first sieve plate 2 is provided on the back of the adjusting bracket 33 . The design of the water retaining extension plate 34 can prevent the cleaning water from flowing along the first sieve plate 2 to the adjusting bracket 33 when falling.

[0034] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0037] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A preparation device for nano-scale multi-level pore ZSM-5 molecular sieve, comprising a feeding module connected to a cleaning device, wherein a drying module is provided at the discharge end of the feeding module, characterized in that: The feed module comprises an inclined mounting frame (1), a first sieve plate (2) and a second sieve plate (3) are arranged in sequence in the mounting frame (1) along the material conveying direction, and a water collection bin (4) is arranged below the mounting frame (1); The drying module comprises a base (5), on which an inclined drying cylinder (6) is arranged, and a driving assembly for driving the drying cylinder (6) to rotate is arranged outside the drying cylinder (6), a drying chamber (7) connected to the feeding module is arranged at the upper part of the drying cylinder (6), and a water collecting chamber (8) is arranged at the lower part, a partition (9) is arranged between the drying chamber (7) and the water collecting chamber (8), and a heating assembly is arranged in the drying chamber (7).

2. The device for preparing nano-scale multi-level pore ZSM-5 molecular sieve according to claim 1, characterized in that: The heating assembly comprises a mounting frame (10) disposed on the upper part of the drying chamber (7); one end of the mounting frame (10) is connected to the base (5); the other end is provided with a drying pipe group and a dehumidifying device; the base (5) is provided with a hot air blower (11) connected to the drying pipe group.

3. The device for preparing nano-scale multi-level pore ZSM-5 molecular sieve according to claim 2, characterized in that: The drying pipe group comprises a first hot air pipe (12) for blowing air towards the material and a second hot air pipe (13) for blowing air towards the inner wall of the drying chamber (7).

4. The device for preparing nano-scale multi-level pore ZSM-5 molecular sieve according to claim 1, characterized in that: The drying chamber (7) is provided with a material-discharging ridge (14) on the inner side wall, the material-discharging ridge (14) is in plurality, and a drainage groove (15) is provided between two adjacent material-discharging ridges (14). The water collecting chamber (8) is provided with a guide groove (16) on the inner side wall connected to the drainage groove (15). The partition plate (9) is provided with a filter mesh (17), and the diameter of the filter mesh (17) is the same as the diameter of the sieve holes on the first sieve plate (2) and the second sieve plate (3).

5. The device for preparing nano-scale multi-level pore ZSM-5 molecular sieve according to claim 4, characterized in that: The surfaces of the material-selecting ridges (14) and the drain grooves (15) are provided with a hydrophobic layer (23).

6. The device for preparing nano-scale multi-level pore ZSM-5 molecular sieve according to claim 1, characterized in that: A vibration block (24) is disposed at the bottom of each of the first sieve plate (2) and the second sieve plate (3), a transmission rod (25) is disposed in the middle of the vibration block (24), and a driving source (22) connected to the transmission rod (25) is disposed on the outside of the mounting frame (1).

7. The device for preparing nano-scale multi-level pore ZSM-5 molecular sieve according to claim 1, characterized in that: The first screen plate (2) has an inclination angle of 15-30 degrees, and a material blocking strip (18) is provided on the upper surface of the first screen plate (2). The material blocking strip (18) is arc-shaped, and the top of the arc coincides with the center line of the first screen plate (2).

8. The device for preparing nano-scale multi-level pore ZSM-5 molecular sieve according to claim 7, characterized in that: The second sieve plate (3) has an inclination angle of 30-45 degrees, a material leveling plate (19) is arranged above the second sieve plate (3), and a material discharge gap (20) is arranged between the material leveling plate (19) and the second sieve plate (3).

9. The device for preparing nano-scale multi-level pore ZSM-5 molecular sieve according to claim 8, characterized in that: The height of the material discharge gap (20) gradually increases from the middle of the second screen plate (3) to both ends, and a material discharge opening (21) corresponding to the position of the material leveling plate (19) is provided on the side wall of the mounting frame (1).

10. A method for using the device for preparing nanoscale multi-level pore ZSM-5 molecular sieve according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Connect the feed module to the discharge end of the cleaning device through a conveying pipeline; Step 2: After the material enters the feed module through the self-cleaning device, it first rolls downward along the first screen plate (2), achieving a first solid-liquid separation during the rolling process, and blocking the material with a smaller particle size under the action of the blocking bar (18); Step three, the material enters the second screen plate (3) and continues to roll downward. During the rolling process, the material with a qualified particle size continues to fall through the material discharge gap (20), and the material with a larger particle size rolls along the material leveling plate (19) to the discharge port (21) and is discharged; Step 4: The material flows in the feeding module. When the material accumulates or falls slowly, the driving source (22) is turned on and the vibration device starts to work to assist the falling of the material. Step 5: After the material enters the drying cylinder (6), the drying tube group and the dehumidification device start to operate to dry the material. During the drying operation, the residual moisture on the surface of the material flows through the drain trough (15) to the water collection chamber (8), and the water vapor is extracted by the dehumidification device until the drying operation is completed; Step six, after the drying operation is completed, the material is transferred to the outside of the drying cylinder (6) for standby use.

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