Mixed particle classification device and method of operating the same

Abstract

The application discloses a kind of mixed particle grading device and its operating method, it is related to particle material processing technical field, comprising: the first cylinder body extending in vertical direction, it is provided with the flow guide member that can make material produce spiral rotation, the lower end of first cylinder body forms inlet and outlet, inlet and outlet are used for coarse particle discharge and pass into gas;Second cylinder body, it is arranged in first cylinder body and located below flow guide member, the upper portion of second cylinder body extends and forms first inlet in vertical direction, the lower portion of second cylinder body extends and forms first discharge outlet out of first cylinder body, annular space is formed between first cylinder body and second cylinder body, it is provided with the turbulence subassembly for elutriation particle, second discharge outlet is formed at the side wall of first cylinder body, located above turbulence subassembly, below the upper end of second cylinder body;With the upper end of first cylinder body connection feed pipe and air inlet pipe.This application can more fully grade mixed particles with large difference, so that the grading device has higher grading precision.

Description

Technical Field

[0001] This invention relates to the field of particulate material processing technology, and in particular to a mixed particle grading device and its operation method. Background Technology

[0002] Currently, particulate materials are widely used in many industries, such as solid catalysts used extensively in petroleum refining and other chemical industries, minerals in mining, and grains in agriculture. In practical applications, there are generally certain requirements for particle size distribution, and the particle size distribution often has a significant, even crucial, impact on the performance of the processes, materials, or products involved. Therefore, it is sometimes necessary to classify mixed particulate materials according to particle size.

[0003] Commonly used particle classification methods in industry include sieving, centrifugation, and sedimentation, with sieving being the most widely used. However, sieving suffers from drawbacks such as screen clogging and highly dependent on particle shape, making it difficult to guarantee accuracy. Centrifugal classification equipment suffers from low internal particle concentration, short particle residence time, and the mixing of particles of different sizes. Simple sedimentation also presents similar problems. To address these issues, a technology is urgently needed to more thoroughly classify widely mixed particles, thereby achieving higher classification accuracy and overcoming the shortcomings of existing technologies. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a mixed particle classification device and its operating method, which can classify mixed particles with large differences more fully, thereby giving the classification device higher classification accuracy.

[0005] The specific technical solution of this invention is as follows:

[0006] A mixed particle grading device, the mixed particle grading device comprising:

[0007] A first cylinder extending vertically is provided in the first cylinder, and a flow guiding component is provided in the first cylinder to cause the material to rotate in a spiral. The lower end of the first cylinder forms an inlet and outlet, which are used for the discharge of coarse particles and the introduction of gas.

[0008] The second cylinder is disposed within the first cylinder and located below the flow guiding member. The upper part of the second cylinder extends vertically to form a first inlet, and the lower part of the second cylinder extends out of the first cylinder to form a first outlet. An annular space is formed between the first cylinder and the second cylinder. A turbulence-raising component for separating particles is disposed in the annular space. A second outlet is formed on the side wall of the first cylinder, located above the turbulence-raising component and below the upper end of the second cylinder.

[0009] The feed pipe and air inlet pipe are connected to the upper end of the first cylinder.

[0010] Preferably, the feed pipe is used to input mixed particles comprising at least two different particle size classes, one of which is micron-sized particles and the other is millimeter-sized or larger particles.

[0011] Preferably, the second cylinder includes a first part extending vertically and a second part connected to the lower end of the first part; the first part of the second cylinder is coaxially arranged with the first cylinder, and the second part of the second cylinder extends out of the side wall of the first cylinder to form a first outlet.

[0012] Preferably, the flow guiding member includes a shaft and a plurality of circumferentially distributed flow guiding blades located on the side wall of the shaft, and a flow guiding channel is formed between adjacent flow guiding blades, the flow guiding channel extending spirally around the shaft.

[0013] Preferably, the first cylinder includes a first cylinder first part and a first cylinder second part connected to the lower end of the first cylinder first part, wherein the inner diameter of the first cylinder first part is smaller than the inner diameter of the first cylinder second part;

[0014] The flow guiding component is disposed inside the first part of the first cylinder, and the upper end of the second cylinder extends into the lower part of the first part of the first cylinder, forming the annular space between the first part of the second cylinder and the second part of the first cylinder.

[0015] Preferably, the second outlet is located on the side wall of the second part of the first cylinder; the lower end of the first part of the first cylinder has a baffle extending downward into the second part of the first cylinder, the baffle being circumferentially positioned opposite the second outlet, and vertically positioned above the lowest point of the baffle.

[0016] Preferably, the turbulence component includes:

[0017] An annular inner and outer flow deflector are spaced apart. The inner flow deflector is installed on the outer side wall of the second cylinder and has a downward trend in the radial direction from the inside to the outside. The outer flow deflector is installed on the inner side wall of the first cylinder and has a downward trend in the radial direction from the outside to the inside. The projection portions of the inner and outer flow deflectors overlap in the vertical direction.

[0018] Preferably, the feed pipe is connected to the side wall of the air intake pipe; a flow divider is provided in the air intake pipe corresponding to the connection between the feed pipe and the air intake pipe, the flow divider divides the air intake pipe into a first flow channel and a second flow channel, the first flow channel extends along the axial direction of the air intake pipe, and the second flow channel extends toward the connection between the feed pipe and the air intake pipe.

[0019] The cross-section of the diversion component has a receiving surface forming a triangle, a first air inlet surface, and a second air inlet surface. The first air inlet surface forms a first flow channel with the air inlet pipe, and the first air inlet surface is parallel to the axis of the air inlet pipe. The second air inlet surface forms a second flow channel with the air inlet pipe, and the receiving surface is inclined downward toward the connection between the air inlet pipe and the feed pipe.

[0020] Preferably, the lower part of the first cylinder has a tapered structure.

[0021] The mixed particle classification device includes:

[0022] A gas distributor is installed at the tapered structure inside the first cylinder. The gas distributor is located between the inlet and outlet of the first cylinder and the turbulence component. Gas input from the inlet and outlet of the first cylinder flows to the turbulence component after being evenly distributed by the gas distributor.

[0023] An operating method for a mixed particle classification device as described above, the operating method comprising:

[0024] Mixed particles and gas are fed into the feed pipe and the air inlet pipe respectively, and mixed and diffused under the action of the flow divider to form an airflow containing mixed particles;

[0025] The airflow containing mixed particles is passed through a guide member to make it into a swirling airflow. Under the centrifugal force of the swirling airflow, the larger particles in the mixed particles, along with some smaller particles, move toward the side wall of the first cylinder and then enter the annular space. The smaller particles in the mixed particles move toward the middle of the first cylinder and then enter the second cylinder and are discharged from the first outlet.

[0026] Gas is introduced into the inlet and outlet at the lower end of the first cylinder. The larger particles in the mixed particles, along with some smaller particles, are separated again in the annular space by the turbulence component and the counter-current gas separation effect of the gas input from the inlet and outlet. The larger particles are discharged from the inlet and outlet, while the smaller particles are carried by the gas and discharged from the second outlet.

[0027] The technical solution of the present invention has the following significant beneficial effects:

[0028] 1. The axial flow centrifugal separation of the flow guiding component can separate large particles from small particles without changing the direction of the mainstream gas flow. It has the characteristics of simple structure, no dead zone in operation, maintenance-free operation, strong gas handling capacity, and easy design into a detachable and washable structure.

[0029] 2. Since the upper part of the second cylinder extends vertically to form the first inlet and is located below the flow guide member, it can further enhance the entry of larger particles into the annular space formed between the first cylinder and the second cylinder, and suppress the back-mixing phenomenon of smaller particles in the mixed particles moving towards the middle of the first cylinder.

[0030] 3. A turbulence-dispersing component for separating particles is provided in the annular space, and gas is introduced into the inlet and outlet at the lower end of the first cylinder. On the one hand, the turbulence is increased to disperse the agglomerated smaller particles and the smaller particles adhering to the larger particles. On the other hand, the "separation" effect of the airflow on the particles is enhanced, the amount of fine powder entrained in the coarse powder is reduced, and the classification accuracy is further improved.

[0031] 4. This application couples key classification technologies such as particle dispersion, centrifugal separation, and mixed particle separation to meet the requirements of efficient and rapid classification of mixed particles in industrial production processes.

[0032] Specific embodiments of the invention are disclosed in detail below with reference to the description and accompanying drawings, indicating how the principles of the invention can be employed. It should be understood that the embodiments of the invention are not therefore limited in scope. Features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. Attached Figure Description

[0033] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0034] Figure 1 This is a schematic cross-sectional view of the mixing particle grading device in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the connection between the feed pipe and the air inlet pipe with a flow diversion component in an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the flow diversion component in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of the turbulence-disrupting component and the second cylinder in an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the flow guiding component in an embodiment of the present invention.

[0039] The reference numerals in the above figures are as follows:

[0040] 1. Feed pipe; 2. Air inlet pipe; 3. Diverting component; 31. Receiving surface; 32. Second air inlet surface; 33. First air inlet surface; 4. Guide component; 41. Shaft; 42. Guide vane; 43. Guide channel; 5. First cylinder; 51. Second outlet; 52. Inlet and outlet; 53. Baffle; 54. First part of the first cylinder; 55. Second part of the first cylinder; 56. Gradual reduction structure; 6. Annular space; 7. Baffle assembly; 71. Inner baffle; 72. Outer baffle; 8. Second cylinder; 81. First part of the second cylinder; 82. Second part of the second cylinder; 9. Gas distributor. Detailed Implementation

[0041] The details of the present invention can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on the invention, all of which should be considered within the scope of the invention. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "connected" should be interpreted broadly, for example, they can refer to mechanical or electrical connections, or internal communication between two elements, and can be direct or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] To enable more thorough classification of widely mixed particles, thereby achieving higher classification accuracy, this application proposes a mixed particle classification device. Figure 1 This is a schematic cross-sectional view of the mixing particle grading device in an embodiment of the present invention, as shown below. Figure 1 As shown, the mixed particle classification device includes: a first cylinder 5 extending vertically, a flow guide 4 provided in the first cylinder 5 to cause the material to rotate in a spiral, an inlet and outlet 52 formed at the lower end of the first cylinder 5 for discharging coarse particles and introducing gas; a second cylinder 8 disposed in the first cylinder 5 and located below the flow guide 4, a first inlet formed at the upper part of the second cylinder 8 extending vertically, a first outlet formed at the lower part of the second cylinder 8 extending out of the first cylinder 5, an annular space 6 formed between the first cylinder 5 and the second cylinder 8, a turbulence 7 for separating particles provided in the annular space 6, a second outlet 51 formed on the side wall of the first cylinder 5 above the turbulence 7 and below the upper end of the second cylinder 8; a feed pipe 1 and an air inlet pipe 2 connected to the upper end of the first cylinder 5.

[0044] Furthermore, the feed pipe 1 can be connected to the side wall of the air intake pipe 2. Figure 2 This is a schematic diagram of the connection between the feed pipe and the air inlet pipe with a flow divider in an embodiment of the present invention, as shown below. Figure 2 As shown, a flow divider 3 is installed in the air intake pipe 2 corresponding to the connection between the feed pipe 1 and the air intake pipe 2. The flow divider 3 divides the air intake pipe 2 into a first flow channel and a second flow channel. The first flow channel extends along the axial direction of the air intake pipe 2, and the second flow channel extends towards the connection between the feed pipe 1 and the air intake pipe 2. The flow divider 3 ensures that the gas B input to the air intake pipe 2 is divided into two conveying airflows with different flow velocities, namely b1 and b2, through at least the first and second flow channels. When the mixed particles A enter from the feed channel, they are dispersed and separated under the combined action of the conveying airflows b1 and b2. Alternatively, when the velocity of the conveying airflow b1 is greater than the velocity of the conveying airflow b2, the conveying airflow b1 can provide a certain lifting effect on the mixed particles A, while the conveying airflow b2 can more fully disperse the mixed particles A. It is worth noting that the flow divider 3 in this application can also divide the gas entering from the intake pipe 2 into multiple streams with different flow rates. Its specific structural configuration can be selected according to actual needs, such as the type of mixed particles and construction conditions.

[0045] The feed pipe 1 in this application is used to input mixed particles that include at least two different particle size classes, one of which is micron-sized particles and the other is millimeter-sized or larger particles.

[0046] As a feasible option, Figure 3 This is a schematic diagram of the flow diversion component in an embodiment of the present invention, as shown below. Figure 3 As shown, the cross-section of the diverting component 3 has a triangular receiving surface 31, a first air inlet surface 33, and a second air inlet surface 32. The first air inlet surface 33 forms a first flow channel with the air inlet pipe 2, and the first air inlet surface 33 is parallel to the axis of the air inlet pipe 2, thus minimizing the resistance to the conveying airflow b1. The second air inlet surface 32 forms a second flow channel with the air inlet pipe 2, allowing the conveying airflow b2 to flow towards the feed pipe 1 to mix the mixed particles in the feed pipe 1. The receiving surface 31 is inclined downwards towards the connection between the air inlet pipe 2 and the feed pipe 1. The mixed particles output from the feed pipe 1 mix with the conveying airflow b2 and then impact the receiving surface 31, further dispersing the mixed particles before further mixing them with the conveying airflow b1, ultimately ensuring the dispersion of the mixed particles in the gas. The flow rates of the conveying airflows b1 and b2 can be adjusted by controlling the distance between the first air inlet surface 33 of the diverting component 3 and the air inlet pipe 2.

[0047] The flow guiding component 4 is used to guide the dispersed mixed particles carried by the conveying airflow to rotate spirally downwards around the axis of the first cylinder 5. This axial-flow centrifugal separation method does not change the mainstream direction of the gas flow, and also features strong gas handling capacity and ease of design for disassembly and cleaning. During this process, the mixed particles in the airflow generate centrifugal force under the spiral action. Larger particles in the mixture carry some smaller particles and move towards the side wall of the first cylinder 5. Smaller particles move towards the center of the first cylinder 5. In one feasible embodiment, Figure 4 This is a schematic diagram of the structure of the turbulence-disrupting component and the second cylinder in an embodiment of the present invention, as shown below. Figure 4 As shown, the flow guiding component 4 includes a shaft 41 and a plurality of circumferentially distributed flow guiding blades 42 located on the side wall of the shaft 41. A flow guiding channel 43 is formed between adjacent flow guiding blades 42, and the flow guiding channel 43 extends spirally around the shaft 41. Furthermore, to ensure the strength of the centrifugal force generated by the mixed particles under spiral action, the outlet angle of the flow guiding blades 42 can be controlled between 20 degrees and 50 degrees.

[0048] like Figure 1 As shown, the second cylinder 8 includes a vertically extending first cylinder portion 81 and a second cylinder portion 82 connected to the lower end of the first cylinder portion 81. An annular space 6 is formed between the first cylinder portion 81 and the first cylinder 5. The second cylinder portion 82 extends beyond the sidewall of the first cylinder 5 to form a first outlet. The second cylinder portion 82 can extend horizontally, thereby reducing its occupation of the annular space 6 between the first cylinder portion 81 and the first cylinder 5, facilitating the arrangement of more flow-disrupting components 7. Smaller particles in the mixed particles moving towards the center of the first cylinder 5 enter the second cylinder 8 and are discharged from the first outlet. Larger particles in the mixed particles moving towards the sidewall of the first cylinder 5 carry some smaller particles into the annular space 6. Gas is introduced into the inlet and outlet 52 at the lower end of the first cylinder 5. The larger particles in the mixed particles, along with some smaller particles, are separated again in the annular space 6 by the turbulence component 7 and the counter-current gas separation effect of the gas input from the inlet and outlet 52. The larger particles are discharged from the inlet and outlet 52, while the smaller particles are carried by the gas and discharged from the second outlet 51.

[0049] Furthermore, the first part 81 of the second cylinder can be coaxially arranged with the first cylinder 5.

[0050] An annular space 6 is equipped with a turbulence-inducing component 7 for particle separation. The turbulence-inducing component 7 causes larger particles in the mixed particles, along with some smaller particles, to continuously collide with the turbulence-inducing component 7 as they move downwards in the annular space 6. This causes the larger particles to separate from the smaller particles. The separated smaller particles are then carried upwards by the counter-current gas flow from the inlet and outlet 52 and are eventually discharged from the second outlet 51.

[0051] To ensure that larger particles, carrying some smaller particles, collide more fully with the turbulence-inducing component 7 as they move downwards in the annular space 6, and to facilitate the upward movement of the separated smaller particles by the counter-current gas flow from inlet / outlet 52, a feasible approach is as follows: Figure 1 As shown, the first cylinder 5 includes a first cylinder first part 54 and a first cylinder second part 55 connected to the lower end of the first cylinder first part 54. The inner diameter of the first cylinder first part 54 is smaller than the inner diameter of the first cylinder second part 55. The flow guiding member 4 is disposed inside the first cylinder first part 54. The upper end of the second cylinder 8 extends into the lower part of the first cylinder first part 54. An annular space 6 is formed between the second cylinder first part 81 and the first cylinder second part 55.

[0052] Preferably, the ratio between the inner diameter of the first part 81 of the second cylinder and the inner diameter of the first part 54 of the first cylinder can be controlled between 0.75 and 0.85.

[0053] In one feasible implementation, Figure 5 This is a schematic diagram of the flow guiding component in an embodiment of the present invention, as shown below. Figure 5 As shown, the aerodynamic component 7 may include: an annularly arranged inner aerodynamic element 71 and an outer aerodynamic element 72, spaced apart. The inner aerodynamic element 71 is mounted on the outer wall of the second cylinder 8, and its radial direction from the inside to the outside is downward. The outer aerodynamic element 72 is mounted on the inner wall of the first cylinder 5, and its radial direction from the outside to the inside is downward. The vertical projections of the inner and outer aerodynamic elements 71 and 72 overlap. For example, the inner aerodynamic element 71 can be welded to the outer wall of the second cylinder 8, and the outer aerodynamic element 72 can be welded to the inner wall of the first cylinder 5. The radial cross-sections of the inner and outer aerodynamic elements 71 and 72 can be triangular, arc-shaped, or polygonal, etc.

[0054] Furthermore, multiple inner and outer turbulence elements 71 and 72 can be alternately arranged in the vertical direction to fully disperse the descending particles and achieve more precise grading.

[0055] As a feasible option, such as Figure 1 As shown, the second outlet 51 is located on the side wall of the second part 55 of the first cylinder. The lower end of the first part 54 of the first cylinder has a baffle 53 extending downward into the second part 55 of the first cylinder. The baffle 53 is circumferentially aligned with the second outlet 51, and vertically, the second outlet 51 is higher than the lowest point of the baffle 53. This design minimizes the amount of larger particles entering the annular space 6 that are expelled through the counter-current gas flow and discharged through the second outlet 51.

[0056] like Figure 1 As shown, the lower part of the first cylinder 5 may have a tapered structure 56. Additionally, the mixing particle classification device may include a gas distributor 9 disposed within the tapered structure 56 inside the first cylinder 5. The gas distributor 9 is located between the inlet / outlet 52 of the first cylinder 5 and the turbulence-disrupting assembly 7. Gas input from the inlet / outlet 52 of the first cylinder 5 flows to the turbulence-disrupting assembly 7 after being evenly distributed by the gas distributor 9. The gas distributor 9 allows the gas input from the inlet / outlet 52 of the first cylinder 5 to flow more evenly to the turbulence-disrupting assembly 7 in the circumferential direction, and to fully contact the larger particles carrying some smaller particles moving downwards in the annular space 6, thereby separating the smaller particles.

[0057] The operation method of the above-mentioned mixed particle classification device can be as follows, specifically including: mixing and diffusing the mixed particles and gas through the feed pipe 1 and the air inlet pipe 2 respectively, and forming an airflow containing mixed particles under the action of the flow splitting member 3; passing the airflow containing mixed particles through the flow guide member 4 to make it into a swirling airflow, under the action of the centrifugal force of the swirling airflow, the larger particles in the mixed particles, carrying some smaller particles, move towards the side wall of the first cylinder 5 and then enter the annular space 6, while the smaller particles in the mixed particles (which may contain a small number of larger particles) move towards the middle of the first cylinder 5 and then enter the second cylinder 8 and are discharged from the first outlet; introducing gas into the inlet and outlet 52 at the lower end of the first cylinder 5, the larger particles in the mixed particles, carrying some smaller particles, are separated again in the annular space 6 under the action of the turbulence component 7 and the counter-current gas separation of the gas input from the inlet and outlet 52, the larger particles are discharged from the inlet and outlet 52, and the smaller particles are carried by the gas and discharged from the second outlet 51.

[0058] The mixed particle classification device in this application specifically considers the following three aspects: particle dispersibility, the distribution of the classification flow field, and the separation of smaller particles entrained in larger particles. Good dispersibility can reduce the possibility of particle agglomeration and entrainment. A uniform and stable centrifugal force field can accurately classify large-disparate mixed particles at a certain particle size. By introducing internal components to separate smaller particles entrained in larger particles, smaller particles attached to larger particles can be further classified, thereby improving the classification accuracy. Therefore, in this application, the mixed particles are first fully dispersed by the high-speed airflow in the inlet pipe 2 in conjunction with the flow splitter 3 when they are input into the first cylinder 5, so as to improve the efficiency of subsequent centrifugal separation. Secondly, the axial flow centrifugal separation of the flow guide 4 can separate larger and smaller particles without changing the mainstream gas direction. It has the characteristics of simple structure, no dead zone, maintenance-free operation, strong gas handling capacity, and easy design for disassembly and cleaning. Furthermore, since the upper part of the second cylinder 8 extends vertically to form the first inlet and is located below the flow guide member 4, it can further enhance the entry of larger particles into the annular space 6 formed between the first cylinder 5 and the second cylinder 8, suppressing back-mixing of smaller particles with the mixed particles moving towards the middle of the first cylinder 5. Then, a turbulence component 7 for separating particles is provided in the annular space 6, and gas is introduced into the inlet and outlet 52 at the lower end of the first cylinder 5. On the one hand, by increasing turbulence, it disperses agglomerated smaller particles and smaller particles adhering to larger particles. On the other hand, it can enhance the "separation" effect of the airflow on the particles, reduce the amount of fine powder entrained in the coarse powder, and further improve the classification accuracy. Finally, this application couples key classification technologies such as particle dispersion, centrifugal separation, and separation of mixed particles, thereby meeting the requirements for efficient and rapid classification of mixed particles in industrial production processes.

[0059] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.

[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A mixed particle grading device, characterized in that, The mixed particle classification device includes: A first cylinder extending vertically is provided in the first cylinder, and a flow guiding component is provided in the first cylinder to cause the material to rotate in a spiral. The lower end of the first cylinder forms an inlet and outlet, which are used for the discharge of coarse particles and the introduction of gas. A second cylinder is disposed within the first cylinder and located below the flow guiding member. The upper part of the second cylinder extends vertically to form a first inlet, and the lower part of the second cylinder extends out of the first cylinder to form a first outlet. An annular space is formed between the first cylinder and the second cylinder. A turbulence-inducing component for separating particles is disposed in the annular space. A second outlet is formed on the side wall of the first cylinder, located above the turbulence-inducing component and below the upper end of the second cylinder. The second cylinder includes a vertically extending first part and a second part connected to the lower end of the first part. The first part of the second cylinder is coaxially disposed with the first cylinder, and the second part of the second cylinder extends out of the side wall of the first cylinder to form the first outlet. The feed pipe and air inlet pipe are connected to the upper end of the first cylinder.

2. The mixing particle classification device according to claim 1, characterized in that, The feed pipe is used to input mixed particles that include at least two different particle size classes, one of which is micron-sized particles and the other is millimeter-sized or larger particles.

3. The mixing particle classification device according to claim 1, characterized in that, The flow guiding component includes a shaft and a plurality of circumferentially distributed flow guiding blades located on the side wall of the shaft. A flow guiding channel is formed between adjacent flow guiding blades, and the flow guiding channel extends spirally around the shaft.

4. The mixing particle classification device according to claim 1, characterized in that, The first cylinder includes a first cylinder first part and a first cylinder second part connected to the lower end of the first cylinder first part, wherein the inner diameter of the first cylinder first part is smaller than the inner diameter of the first cylinder second part; The flow guiding component is disposed inside the first part of the first cylinder, and the upper end of the second cylinder extends into the lower part of the first part of the first cylinder, forming the annular space between the first part of the second cylinder and the second part of the first cylinder.

5. The mixing particle classification device according to claim 4, characterized in that, The second outlet is located on the side wall of the second part of the first cylinder; the lower end of the first part of the first cylinder has a baffle extending downward into the second part of the first cylinder, the baffle being circumferentially positioned opposite the second outlet, and vertically positioned above the lowest point of the baffle.

6. The mixing particle classification device according to claim 1, characterized in that, The turbulence-disrupting component includes: An annular inner and outer flow deflector are spaced apart. The inner flow deflector is installed on the outer side wall of the second cylinder and has a downward trend in the radial direction from the inside to the outside. The outer flow deflector is installed on the inner side wall of the first cylinder and has a downward trend in the radial direction from the outside to the inside. The projection portions of the inner and outer flow deflectors overlap in the vertical direction.

7. The mixing particle classification device according to claim 1, characterized in that, The feed pipe is connected to the side wall of the air intake pipe; a flow divider is provided in the air intake pipe corresponding to the connection between the feed pipe and the air intake pipe, the flow divider divides the air intake pipe into a first flow channel and a second flow channel, the first flow channel extends along the axial direction of the air intake pipe, and the second flow channel extends toward the connection between the feed pipe and the air intake pipe. The cross-section of the diversion component has a receiving surface forming a triangle, a first air inlet surface, and a second air inlet surface. The first air inlet surface forms a first flow channel with the air inlet pipe, and the first air inlet surface is parallel to the axis of the air inlet pipe. The second air inlet surface forms a second flow channel with the air inlet pipe, and the receiving surface is inclined downward toward the connection between the air inlet pipe and the feed pipe.

8. The mixing particle classification device according to claim 1, characterized in that, The lower part of the first cylinder has a tapering structure. The mixed particle classification device includes: A gas distributor is installed at the tapered structure inside the first cylinder. The gas distributor is located between the inlet and outlet of the first cylinder and the turbulence component. Gas input from the inlet and outlet of the first cylinder flows to the turbulence component after being evenly distributed by the gas distributor.

9. A method for operating the mixing particle classification device as described in claim 7, characterized in that, The operating method includes: Mixed particles and gas are fed into the feed pipe and the air inlet pipe respectively, and mixed and diffused under the action of the flow divider to form an airflow containing mixed particles; The airflow containing mixed particles is passed through a guide member to make it into a swirling airflow. Under the centrifugal force of the swirling airflow, the larger particles in the mixed particles, along with some smaller particles, move toward the side wall of the first cylinder and then enter the annular space. The smaller particles in the mixed particles move toward the middle of the first cylinder and then enter the second cylinder and are discharged from the first outlet. Gas is introduced into the inlet and outlet at the lower end of the first cylinder. The larger particles in the mixed particles, along with some smaller particles, are separated again in the annular space by the turbulence component and the counter-current gas separation effect of the gas input from the inlet and outlet. The larger particles are discharged from the inlet and outlet, while the smaller particles are carried by the gas and discharged from the second outlet.

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