Mixed particle grading device and operation method thereof

Abstract

The invention discloses a mixed particle grading device and an operation method thereof, and relates to the technical field of particle material treatment.The mixed particle grading device comprises a first barrel extending in the vertical direction, the first barrel is provided with a flow guide component capable of enabling materials to spirally rotate, and an inlet and outlet is formed in the lower end of the first barrel and used for discharging coarse particles and introducing gas; the second barrel is arranged in the first barrel and located below the flow guide component, the upper portion of the second barrel extends in the vertical direction to form a first inlet, the lower portion of the second barrel extends out of the first barrel to form a first discharge port, an annular space is formed between the first barrel and the second barrel, and a turbulent flow assembly used for raising particles is arranged in the annular space; a second discharge port located above the turbulent flow assembly and below the upper end of the second barrel is formed in the side wall of the first barrel; the feeding pipeline and the air inlet pipeline are connected with the upper end of the first barrel. According to the grading device, large-difference mixed particles can be more sufficiently graded, so that the grading device has higher grading precision.

Description

Technical Field

[0001] The present invention relates to the technical field of particulate material processing, and particularly relates to a mixed particle classification device and an operation method thereof. Background Art

[0002] Currently, particulate materials are widely used in many industries. For example, solid catalysts widely used in petroleum refining or other chemical industries, minerals in the mining industry, and grains in agriculture, etc. In actual use, there are basically certain requirements for the particle size distribution of the particles. Moreover, the particle size distribution often has a great, even crucial, impact on the performance of the process or material involved or the product performance. Therefore, sometimes it is necessary to classify the particulate materials in a mixed state according to the particle size.

[0003] Commonly used industrial particle classification methods include screening method, centrifugal method, sedimentation method, etc. Among them, the most widely used is the screening method. The screening method has the disadvantage that the sieve is easily blocked. At the same time, the sorting accuracy has a great relationship with the particle shape, and it is difficult to ensure the screening accuracy; the centrifugal classification equipment has defects such as low internal particle concentration, short particle residence time, and intermixing of particles of different sizes; the simple sedimentation method also has the same problem. Aiming at the problems existing in the prior art, there is an urgent need for a technology that can classify large-difference mixed particles more fully, so that the classification device has higher classification accuracy to make up for the deficiencies of the prior art. 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 an operation method thereof, which can classify large-difference mixed particles more fully, so that the classification device has higher classification accuracy.

[0005] The specific technical solution of the embodiments of the present invention is as follows:

[0006] A mixed particle classification device, the mixed particle classification device includes:

[0007] A first cylinder extending in the vertical direction, a guiding member capable of causing the material to rotate spirally is provided in the first cylinder, and an inlet and outlet is formed at the lower end of the first cylinder, and the inlet and outlet is used for discharging coarse particles and introducing gas;

[0008] A second cylinder body, which is arranged in the first cylinder body and located below the flow guiding member. The upper part of the second cylinder body extends vertically to form a first inlet, and the lower part of the second cylinder body extends out of the first cylinder body to form a first discharge outlet. An annular space is formed between the first cylinder body and the second cylinder body, and a flow disturbing assembly for elutriating particles is arranged in the annular space. A second discharge outlet is formed at the side wall of the first cylinder body, above the flow disturbing assembly and below the upper end of the second cylinder body;

[0009] A feed pipe and an air inlet pipe connected to the upper end of the first cylinder body.

[0010] Preferably, the mixed particles input by the feed pipe at least include two different particle size levels of particles, one of which is micron-sized particles and the other is particles with a particle size of millimeters or above.

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

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

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

[0014] The flow guiding member is arranged in the first part of the first cylinder body, the upper end of the second cylinder body extends into the lower part of the first part of the first cylinder body, and the annular space is formed between the first part of the second cylinder body and the second part of the first cylinder body.

[0015] Preferably, the second discharge outlet is located at the side wall of the second part of the first cylinder body; the lower end of the first part of the first cylinder body has a baffle extending downward into the second part of the first cylinder body, and the circumferential position of the baffle corresponds to the second discharge outlet. In the vertical direction, the second discharge outlet is higher than the lowest point of the baffle.

[0016] Preferably, the flow disturbing assembly includes:

[0017] Spaced-apart annular inner turbulators and outer turbulators are provided. The inner turbulators are installed on the outer side wall of the second cylinder body, and the inner turbulators show a downward trend in the radial direction from the inside to the outside; the outer turbulators are installed on the inner side wall of the first cylinder body, and the outer turbulators show a downward trend in the radial direction from the outside to the inside; the projected parts of the inner turbulators and the outer turbulators overlap in the vertical direction.

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

[0019] The cross-section of the flow splitting member has a material receiving surface, a first air inlet surface and a second air inlet surface that form a triangle. The first air inlet surface and the intake pipe form the first flow channel. The first air inlet surface is parallel to the axis of the intake pipe. The second air inlet surface and the intake pipe form the second flow channel. The material receiving surface is inclined downward towards the connection between the intake pipe and the feed pipe.

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

[0021] The mixed particle classification device includes:

[0022] A gas distributor provided at the tapered structure inside the first cylinder body. The gas distributor is located between the inlet and outlet of the first cylinder body and the turbulator assembly. The gas input from the inlet and outlet of the first cylinder body flows towards the turbulator assembly after being evenly distributed by the gas distributor.

[0023] An operation method using the mixed particle classification device as described above. The operation method includes:

[0024] Mixing and diffusing the mixed particles and the gas by respectively inputting them into the feed pipe and the intake pipe and under the action of the flow splitting member to form an air flow containing mixed particles.

[0025] Making the air flow containing mixed particles pass through the guiding member to turn it into a swirling air flow. Under the centrifugal force of the swirling air flow, the larger-sized particles in the mixed particles carry some of the smaller-sized particles and move towards the side wall of the first cylinder body and then enter the annular space. The smaller-sized particles in the mixed particles move towards the middle of the first cylinder body and then enter the second cylinder body and are discharged from the first discharge port.

[0026] The gas is introduced into the inlet and outlet at the lower end of the first cylinder body. Among the mixed particles, the larger-sized particles entrain some of the smaller-sized particles, and the larger-sized particles are separated again in the annular space under the countercurrent gas elutriation effect of the turbulence component and the gas input from the inlet and outlet. The larger-sized particles are discharged from the inlet and outlet, while the smaller-sized particles are entrained by the gas and discharged from the second outlet.

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

[0028] 1. By using the axial flow centrifugal separation of the diversion member, the separation of larger-sized particles and smaller-sized particles is achieved without changing the main flow direction of the gas. It has the characteristics of simple structure, no operating dead angle, maintenance-free, strong gas treatment capacity, and is easy to be designed into a detachable and cleanable structure.

[0029] 2. Since the upper part of the second cylinder body extends vertically to form a first inlet and is located below the diversion member, it can further strengthen the entry of larger-sized particles into the annular space formed between the first cylinder body and the second cylinder body, and inhibit the backmixing phenomenon of smaller-sized particles in the mixed particles moving towards the middle of the first cylinder body.

[0030] 3. A turbulence component for elutriating particles is arranged in the annular space, and gas is introduced into the inlet and outlet at the lower end of the first cylinder body. On the one hand, by increasing the disturbance, the agglomerated smaller-sized particles and the smaller-sized particles adhering to the larger-sized particles are dispersed. On the other hand, it can strengthen the "elutriation" effect of the gas flow on the particles, reduce the entrainment amount of fine powder in the coarse powder, and further improve the classification accuracy.

[0031] 4. In this application, key classification technologies such as particle dispersion, centrifugal separation, and elutriation of mixed particles are coupled to meet the efficient and rapid classification of mixed particles in the industrial production process.

[0032] Referring to the following description and the accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope thereby. Features described and / or illustrated for one embodiment can be used in the same or similar way in one or more other embodiments, combined with the features in other embodiments, or replace the features in other embodiments. Description of the Drawings

[0033] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention disclosure in any way. Additionally, the shapes, proportional dimensions, etc. of the various components in the drawings are only schematic and are used to assist in understanding the present invention, rather than specifically defining the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can, under the teachings of the present invention, select various possible shapes and proportional dimensions according to specific circumstances to implement the present invention.

[0034] Figure 1 It is a schematic cross-sectional structure diagram of the mixed particle classification device in an embodiment of the present invention;

[0035] Figure 2 It is a schematic structure diagram of the connection between the feed pipe and the intake pipe with a flow splitting member in an embodiment of the present invention;

[0036] Figure 3 It is a schematic structure diagram of the flow splitting member in an embodiment of the present invention;

[0037] Figure 4 It is a schematic structure diagram of the flow disturbing component and the second cylinder body in an embodiment of the present invention;

[0038] Figure 5 It is a schematic structure diagram of the flow guiding member in an embodiment of the present invention.

[0039] The reference numerals of the above accompanying drawings:

[0040] 1. Feed pipe; 2. Intake pipe; 3. Flow splitting member; 31. Material receiving surface; 32. Second air inlet surface; 33. First air inlet surface; 4. Flow guiding member; 41. Shaft body; 42. Flow guiding vanes; 43. Flow guiding channel; 5. First cylinder body; 51. Second discharge port; 52. Inlet and outlet; 53. Baffle; 54. First part of the first cylinder body; 55. Second part of the first cylinder body; 56. Tapered structure; 6. Annular space; 7. Flow disturbing component; 71. Inner flow disturbing member; 72. Outer flow disturbing member; 8. Second cylinder body; 81. First part of the second cylinder body; 82. Second part of the second cylinder body; 9. Gas distributor. Detailed implementation manners

[0041] Combined with the accompanying drawings and the description of the specific embodiments of the present invention, the details of the present invention can be more clearly understood. However, the specific embodiments of the present invention described herein are only for the purpose of explaining the present invention and cannot be construed in any way as a limitation of the present invention. Under the teaching of the present invention, those skilled in the art can conceive any possible variations based on the present invention, and these should all be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiment.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0043] In order to more fully classify large-difference mixed particles, so that the classification device has higher classification accuracy, a mixed particle classification device is proposed in this application. Figure 1 It is a schematic cross-sectional structure diagram of the mixed particle classification device in the embodiment of the present invention, as Figure 1 shown, the mixed particle classification device includes: a first cylinder body 5 extending in the vertical direction, a guiding member 4 capable of causing the material to rotate spirally is arranged in the first cylinder body 5, an inlet and outlet 52 is formed at the lower end of the first cylinder body 5, and the inlet and outlet 52 is used for discharging coarse particles and introducing gas; a second cylinder body 8, the second cylinder body 8 is arranged in the first cylinder body 5 and is located below the guiding member 4, the upper part of the second cylinder body 8 extends in the vertical direction to form a first inlet, the lower part of the second cylinder body 8 extends out of the first cylinder body 5 to form a first discharge port, an annular space 6 is formed between the first cylinder body 5 and the second cylinder body 8, a turbulent flow assembly 7 for elutriating particles is arranged in the annular space 6, and a second discharge port 51 is formed on the side wall of the first cylinder body 5 above the turbulent flow assembly 7 and below the upper end of the second cylinder body 8; a feed pipe 1 and an air inlet pipe 2 connected to the upper end of the first cylinder body 5.

[0044] Further, the feed pipe 1 can be connected to the side wall of the intake pipe 2. Figure 2 FIG. Figure 2 is a schematic structural view of the connection between the feed pipe and the intake pipe with a flow dividing member in the embodiment of the present invention. As Figure 2 shown, a flow dividing member 3 is disposed in the intake pipe 2 corresponding to the connection between the feed pipe 1 and the intake pipe 2. The flow dividing member 3 divides the intake pipe 2 into a first flow path and a second flow path. The first flow path extends along the axial direction of the intake pipe 2, and the second flow path extends toward the connection between the feed pipe 1 and the intake pipe 2. By means of the flow dividing member 3, the gas B input into the intake pipe 2 can be divided into at least two conveying airflows with different flow rates, namely b1 and b2, through the first flow path and the second flow path. When the mixed particles A enter from the feed channel, the mixed particles A are dispersed and separated under the combined action of the conveying airflows b1 and b2. As a feasible solution, when the flow rate of the conveying airflow b1 is greater than the flow rate of the conveying airflow b2, the conveying airflow b1 can play a certain lifting role on the mixed particles A. At this time, the conveying airflow b2 can more fully disperse the mixed particles A. It should be noted that the flow dividing member 3 in the present application can also divide the gas entering from the intake pipe 2 into multiple airflows with different flow rates, and its specific structural settings can be specifically selected according to actual needs, such as the types of mixed particles, construction working conditions, etc.

[0045] The feed pipe 1 in the present application is used to input mixed particles including at least two different particle size levels, one of which is micron-sized particles and the other is particles with a particle size of millimeter or above.

[0046] As a feasible solution, Figure 3 FIG. Figure 3 is a schematic structural view of the flow dividing member in the embodiment of the present invention. As Figure 3 shown, the cross section of the flow dividing member 3 has a material receiving surface 31, a first air inlet surface 33, and a second air inlet surface 32 that form a triangle. The first air inlet surface 33 and the intake pipe 2 form a first flow path. The first air inlet surface 33 is parallel to the axis of the intake pipe 2, so as to minimize the resistance to the conveying airflow b1 as much as possible. The second air inlet surface 32 and the intake pipe 2 form a second flow path, so that the conveying airflow b2 flows toward the feed pipe 1 to mix the mixed particles in the feed pipe 1. The material receiving surface 31 is inclined downward toward the connection between the intake pipe 2 and the feed pipe 1. The mixed particles output from the feed pipe 1 are mixed with the conveying airflow b2 and then impact on the material receiving surface 31, so that the mixed particles are further broken up and then further mixed with the conveying airflow b1, finally ensuring the dispersion of the mixed particles in the gas. By controlling the distance between the first air inlet surface 33 of the flow dividing member 3 and the intake pipe 2, the flow rates of the conveying airflows b1 and b2 can be adjusted.

[0047] The flow guiding member 4 is used to form the dispersed mixed particles carried by the conveying air flow into a spiral downward rotation around the axis of the first cylinder body 5. By adopting the axial flow centrifugal separation method, the main flow direction of the gas can be not changed, and at the same time, it also has the characteristics of strong gas processing capacity and is easy to be designed into a detachable and cleanable structure. During this process, the mixed particles in the air flow generate centrifugal force under the spiral action. The particles with larger particle sizes in the mixed particles carry some particles with smaller particle sizes and move towards the side wall of the first cylinder body 5. The particles with smaller particle sizes in the mixed particles move towards the middle of the first cylinder body 5. In a feasible implementation manner, Figure 4 is a schematic structural diagram of the flow disturbing component and the second cylinder body in the embodiment of the present invention, as Figure 4 shown, the flow guiding member 4 includes a shaft body 41 and a plurality of circumferentially distributed flow guiding vanes 42 located on the side wall of the shaft body 41. A flow guiding channel 43 is formed between adjacent flow guiding vanes 42, and the flow guiding channel 43 extends spirally around the shaft body 41. Further, in order to ensure the intensity of the centrifugal force generated by the mixed particles under the spiral action, the outlet angle of the flow guiding vanes 42 can be controlled between 20 degrees and 50 degrees.

[0048] As Figure 1 shown, the second cylinder body 8 includes a first part 81 of the second cylinder body extending vertically and a second part 82 of the second cylinder body connected to the lower end of the first part 81 of the second cylinder body. An annular space 6 is formed between the first part 81 of the second cylinder body and the first cylinder body 5. The second part 82 of the second cylinder body extends out of the side wall of the first cylinder body 5 to form a first row of outlets. The second part 82 of the second cylinder body can extend in the horizontal direction, so as to reduce the annular space 6 between it and the first part 81 of the second cylinder body and the first cylinder body 5, so as to facilitate the arrangement of more flow disturbing components 7. The particles with smaller particle sizes in the mixed particles moving towards the middle of the first cylinder body 5 enter the second cylinder body 8 and are discharged from the first row of outlets. The particles with larger particle sizes in the mixed particles moving towards the side wall of the first cylinder body 5 carry some particles with smaller particle sizes and enter the annular space 6. The gas is introduced into the inlet and outlet 52 at the lower end of the first cylinder body 5. The particles with larger particle sizes in the mixed particles carry some particles with smaller particle sizes and are separated again in the annular space 6 under the countercurrent gas elutriation action of the flow disturbing component 7 and the gas input from the inlet and outlet 52. The particles with larger particle sizes are discharged from the inlet and outlet 52, and the particles with smaller particle sizes are carried by the gas and discharged from the second row of outlets 51.

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

[0050] A turbulator assembly 7 for elutriating particles is provided in the annular space 6. The turbulator assembly 7 causes the larger-sized particles in the mixed particles to carry some of the smaller-sized particles and continuously collide with the turbulator assembly 7 during the downward movement in the annular space 6, so that the larger-sized particles are separated from the smaller-sized particles. The separated smaller-sized particles are entrained and moved upward by the countercurrent gas elutriation of the gas input from the inlet / outlet 52 and finally discharged from the second row of outlets 51.

[0051] In order to enable the larger-sized particles to carry some of the smaller-sized particles to collide more fully with the turbulator assembly 7 during the downward movement in the annular space 6, and at the same time facilitate the separated smaller-sized particles to be entrained and moved upward by the countercurrent gas elutriation of the gas input from the inlet / outlet 52, as a feasible solution, as Figure 1 shown, the first cylinder 5 includes a first part 54 of the first cylinder and a second part 55 of the first cylinder connected to the lower end of the first part 54 of the first cylinder. The inner diameter of the first part 54 of the first cylinder is smaller than the inner diameter of the second part 55 of the first cylinder; the flow guiding member 4 is arranged in the first part 54 of the first cylinder, and the upper end of the second cylinder 8 extends into the lower part of the first part 54 of the first cylinder, and an annular space 6 is formed between the first part 81 of the second cylinder and the second part 55 of the first cylinder.

[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 a feasible implementation manner, Figure 5 is a schematic structural view of the flow guiding member in the embodiment of the present invention. As Figure 5 shown, the turbulator assembly 7 may include: an inner turbulator 71 and an outer turbulator 72 that are annularly arranged at intervals. The inner turbulator 71 is installed on the outer side wall of the second cylinder 8, and the inner turbulator 71 shows a downward trend in the radial direction from inside to outside; the outer turbulator 72 is installed on the inner side wall of the first cylinder 5, and the outer turbulator 72 shows a downward trend in the radial direction from outside to inside; the projections of the inner turbulator 71 and the outer turbulator 72 in the vertical direction partially overlap. For example, the inner turbulator 71 can be installed on the outer side wall of the second cylinder 8 by welding, and the outer turbulator 72 can be installed on the inner side wall of the first cylinder 5 by welding. The cross-section of the inner turbulator 71 and the outer turbulator 72 in the radial direction can be triangular, arc-shaped or polygonal, etc.

[0054] Furthermore, a plurality of inner turbulators 71 and outer turbulators 72 can be alternately arranged in the vertical direction, so as to fully disperse the descending particles to achieve more precise classification.

[0055] As a feasible solution, asFigure 1 As shown, the second row of outlets 51 is located at the side wall of the second part 55 of the first cylinder body. The lower end of the first part 54 of the first cylinder body has a baffle 53 extending downward into the second part 55 of the first cylinder body. The circumferential position of the baffle 53 corresponds to that of the second row of outlets 51. In the vertical direction, the second row of outlets 51 is higher than the lowest point of the baffle 53. In this way, it is possible to minimize the entry of larger-sized particles entering the annular space 6 into the second row of outlets 51 and being discharged under the action of countercurrent gas elutriation.

[0056] As Figure 1 shown, the lower part of the first cylinder body 5 can be of a tapered structure 56. Additionally, the mixed particle classification device may include: a gas distributor 9 provided at the tapered structure 56 within the first cylinder body 5. The gas distributor 9 is located between the inlet and outlet 52 of the first cylinder body 5 and the turbulence generating component 7. The gas input from the inlet and outlet 52 of the first cylinder body 5 flows towards the turbulence generating component 7 after being evenly distributed by the gas distributor 9. By means of the gas distributor 9, the gas input from the inlet and outlet 52 of the first cylinder body 5 can flow more uniformly in the circumferential direction towards the turbulence generating component 7 and come into full contact with the larger-sized particles carrying some smaller-sized particles moving downward in the annular space 6, thereby separating the smaller-sized particles.

[0057] The operation method of the above-mentioned mixed particle classification device can be as follows. Specifically, it may include: respectively passing the mixed particles and the gas through the input feed pipe 1 and the intake pipe 2 and mixing and diffusing them under the action of the shunt member 3 to form an air stream containing mixed particles; passing the air stream containing mixed particles through the guiding member 4 to make it into a swirling air stream. Under the action of the centrifugal force of the swirling air stream, the larger-sized particles in the mixed particles carry some smaller-sized particles and move towards the side wall of the first cylinder body 5 and then enter the annular space 6, while the smaller-sized particles in the mixed particles (which may contain a small amount of larger-sized particles) move towards the middle of the first cylinder body 5 and then enter the second cylinder body 8 and are discharged from the first row of outlets; introducing the gas into the inlet and outlet 52 at the lower end of the first cylinder body 5. The larger-sized particles in the mixed particles carrying some smaller-sized particles are separated again in the annular space 6 under the action of the countercurrent gas elutriation of the turbulence generating component 7 and the gas input from the inlet and outlet 52. The larger-sized particles are discharged from the inlet and outlet 52, and the smaller-sized particles are carried by the gas and discharged from the second row of outlets 51.

[0058] The hybrid particle classification device in this application specifically considers the following three aspects: particle dispersibility, the distribution of the classification flow field, and the entrainment of smaller particles in larger particles. Good dispersibility can reduce the possibility of particle agglomeration and entrainment. A uniform and stable centrifugal force field can accurately classify mixed particles with large differences at a certain particle size. By introducing internal components to entrain the smaller particles in the larger particles, the smaller particles attached to the larger particles can be classified again, thereby improving the classification accuracy. Therefore, in this application, the mixed particles are first fully dispersed by the high-speed airflow in the intake pipe 2 in cooperation with the flow splitting member 3 when they are input into the first cylinder 5 to improve the working efficiency of subsequent centrifugal separation. Secondly, the axial flow centrifugal separation using the guiding member 4 realizes the separation of larger particles and smaller particles without changing the main gas flow direction, which has the characteristics of simple structure, no operating dead corners, and maintenance-free. At the same time, it also has a strong gas processing capacity and is easy to be designed into a detachable and cleanable structure. Furthermore, since the upper part of the second cylinder 8 extends vertically to form a first inlet and is located below the guiding member 4, it can further strengthen the entry of larger particles into the annular space 6 formed between the first cylinder 5 and the second cylinder 8, and suppress the backmixing phenomenon of the smaller particles in the mixed particles moving towards the middle of the first cylinder 5. Then, a turbulence component 7 for entraining particles is arranged 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, the agglomerated smaller particles and the smaller particles adhered to the larger particles are broken up by increasing the disturbance. On the other hand, the "entrainment" effect of the airflow on the particles can be strengthened, reducing the entrainment amount of fine powder in the coarse powder and further improving the classification accuracy. Finally, in this application, the key classification technologies such as particle dispersion, centrifugal separation, and entrainment of mixed particles are coupled to meet the efficient and rapid classification of mixed particles in the industrial production process.

[0059] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of" in describing a combination shall include the identified elements, ingredients, components or steps and other elements, ingredients, components or steps that do not materially affect the basic novel features of the combination. Use of the terms "comprising" or "including" to describe the combinations of elements, ingredients, components or steps herein also contemplates embodiments consisting essentially of these elements, ingredients, components or steps. By using the term "may" herein, it is intended that any of the attributes described as "may" include be optional. A plurality of elements, ingredients, components or steps can be provided by a single integrated element, ingredient, component or step. Alternatively, a single integrated element, ingredient, component or step may be separated into discrete multiple elements, ingredients, components or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step does not mean to exclude other elements, ingredients, components or steps.

[0060] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts among the various embodiments, reference can be made to each other. The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the protection scope of the present invention cannot be limited thereby. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A hybrid particle classification device, characterized in that, The described mixed particle classification device includes: A first cylinder body extending in the vertical direction, in which a flow guiding member capable of causing the material to rotate spirally is provided. An inlet and outlet is formed at the lower end of the first cylinder body, and the inlet and outlet is used for discharging coarse particles and introducing gas. A second cylinder body, which is arranged in the first cylinder body and located below the flow guiding member. The upper part of the second cylinder body extends vertically to form a first inlet, and the lower part of the second cylinder body extends out of the first cylinder body to form a first discharge outlet. An annular space is formed between the first cylinder body and the second cylinder body, and a flow disturbing component for elutriating particles is arranged in the annular space. A second discharge outlet is formed at the side wall of the first cylinder body, above the flow disturbing component and below the upper end of the second cylinder body. A feed pipe and an air inlet pipe connected to the upper end of the first cylinder body.

2. The hybrid particle classification device according to claim 1, wherein The feed pipe is used for inputting mixed particles that at least include two different particle size levels of particles, one of which is micron-sized particles and the other is particles with a particle size of millimeter or above.

3. The hybrid particle classification device according to claim 1, characterized in that, The second cylinder body includes a first part of the second cylinder body extending vertically and a second part of the second cylinder body connected to the lower end of the first part of the second cylinder body. The first part of the second cylinder body is coaxially arranged with the first cylinder body, and the second part of the second cylinder body extends out of the side wall of the first cylinder body to form a first discharge outlet.

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

5. The hybrid particle classification device according to claim 3, characterized in that, The first cylinder body includes a first part of the first cylinder body and a second part of the first cylinder body connected to the lower end of the first part of the first cylinder body. The inner diameter of the first part of the first cylinder body is smaller than the inner diameter of the second part of the first cylinder body. The flow guiding member is arranged in the first part of the first cylinder body, and the upper end of the second cylinder body extends into the lower part of the first part of the first cylinder body. An annular space is formed between the first part of the second cylinder body and the second part of the first cylinder body.

6. The hybrid particle classification device according to claim 5, wherein, The second discharge outlet is located at the side wall of the second part of the first cylinder body. The lower end of the first part of the first cylinder body has a baffle extending downward into the second part of the first cylinder body. The circumferential position of the baffle corresponds to the second discharge outlet. In the vertical direction, the second discharge outlet is higher than the lowest point of the baffle.

7. The hybrid particle classification device according to claim 1, characterized in that, The flow disturbing component includes: An annular inner flow disturbing member and an outer flow disturbing member arranged at intervals. The inner flow disturbing member is installed on the outer side wall of the second cylinder body, and the inner flow disturbing member shows a downward trend in the radial direction from inside to outside. The outer flow disturbing member is installed on the inner side wall of the first cylinder body, and the outer flow disturbing member shows a downward trend in the radial direction from outside to inside. The projections of the inner flow disturbing member and the outer flow disturbing member in the vertical direction partially overlap.

8. The hybrid particle classification device according to claim 1, wherein The feeding pipeline is connected to the side wall of the air inlet pipeline; a flow dividing member is arranged in the air inlet pipeline corresponding to the connection between the feeding pipeline and the air inlet pipeline. The flow dividing member divides the air inlet pipeline into a first flow channel and a second flow channel. The first flow channel extends along the axial direction of the air inlet pipeline, and the second flow channel extends towards the connection between the feeding pipeline and the air inlet pipeline; The cross-section of the flow dividing member has a material receiving surface, a first air inlet surface and a second air inlet surface that form a triangle. The first air inlet surface and the air inlet pipeline form the first flow channel, the first air inlet surface is parallel to the axis of the air inlet pipeline, the second air inlet surface and the air inlet pipeline form the second flow channel, and the material receiving surface is inclined downward towards the connection between the air inlet pipeline and the feeding pipeline.

9. The hybrid particle classification device according to claim 1, characterized in that, The lower part of the first cylinder body is of a tapered structure. The mixed particle classification device includes: A gas distributor arranged at the tapered structure in the first cylinder body. The gas distributor is located between the inlet and outlet of the first cylinder body and the turbulence generating assembly. The gas input from the inlet and outlet of the first cylinder body flows towards the turbulence generating assembly after being evenly distributed by the gas distributor.

10. A method for operating a hybrid particle classification device as described in claim 1, characterized in that, The operation method includes: Mixing and diffusing the mixed particles and the gas by respectively passing them through the input feeding pipeline and the air inlet pipeline and under the action of the flow dividing member to form an air flow containing mixed particles; Passing the air flow containing mixed particles through the guiding member to make it into a swirling air flow. Under the centrifugal force of the swirling air flow, the particles with larger particle sizes in the mixed particles carry some of the particles with smaller particle sizes and move towards the side wall of the first cylinder body and then enter the annular space. The particles with smaller particle sizes in the mixed particles move towards the middle of the first cylinder body and then enter the second cylinder body and are discharged from the first discharge port; Introducing the gas into the inlet and outlet at the lower end of the first cylinder body. The particles with larger particle sizes in the mixed particles carry some of the particles with smaller particle sizes and are separated again in the annular space under the countercurrent gas elutriation action of the turbulence generating assembly and the gas input from the inlet and outlet. The particles with larger particle sizes are discharged from the inlet and outlet, and the particles with smaller particle sizes are carried by the gas and discharged from the second discharge port.

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