Powder concentrator for powder materials

Abstract

The invention discloses a powder concentrator for powder materials, and relates to the technical field of powder concentrators, the powder concentrator comprises an annular volute and a grading area arranged in the annular volute, the grading area comprises a plurality of guide blades, the guide blades are arranged in the annular volute in an annular array mode, and the angles of the guide blades can be adjusted according to different particle sizes; the rotating cage is rotationally installed in the annular volute and located in the center of the inner sides of the multiple guide blades; materials enter the base flow guide cone and flow upwards; annular airflow fed by the annular volute on the periphery enters the rotating cage through the tangential angle regulated and controlled by the guide blades, and is separated under the rotating action of the rotating cage. The invention provides a dynamic powder selecting channel with an inner ring for supplying air materials and an outer ring for discharging coarse materials for the first time, and a complete spiral shear flow field is constructed; an annular auxiliary air supply fan is externally arranged, the front shearing and particle staying path of the rotating cage is enhanced, and separation dead angles are avoided; the angles of the guide blades are adjustable, different particle size / productivity requirements are met, and the working condition matching performance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of powder separators, and particularly relates to a powder separator for powder materials. Background Art

[0002] At present, powder separators are widely used as key sorting devices in the cement industry. Common types include the first-generation centrifugal powder separator, the second-generation cyclone powder separator, and the third-generation cage-type dynamic powder separator.

[0003] The third-generation powder separator has become the current mainstream equipment, and its representative structures include:

[0004] 1. O-sepa type powder separator (eddy current powder separator): In terms of structure, it adopts a combination of a central material spreading plate, annular guide vanes, a rotating cage, etc. The material forms a suspended classification zone under the action of side air intake, with high separation efficiency and a compact structure;

[0005] 2. Improved combined inertial downward air intake powder separator (such as static V-selection + dynamic powder separation device): This type of equipment combines a pre-classification structure (such as V-type inertial separation to prevent large particles from impacting and damaging the guide vanes) with a rotating cage classification chamber. The downward air intake carries the material, and the material enters the rotating cage area through the guide vanes to complete secondary enhanced classification. This structural form strengthens the distribution of the downward air intake mainstream path, improves the processing capacity, and is commonly used in large-output scenarios.

[0006] Although the structures of these two types of third-generation powder separators are different, they have in common that they are both provided with a rotating cage, a guide vane device, and an air-sending material channel, and rely on centrifugal force + gas-solid shear flow field to achieve fine particle classification. However, these traditional structures generally adopt the gas-solid flow path of "downward air intake - upward central outlet", and have the following obvious defects:

[0007] 1. The wind speed in the central air outlet area is high, and the particles impact the elbow fine powder outlet at high speed, causing serious wear of the outlet, which affects the service life of the equipment;

[0008] 2. Due to the blockage of the coarse powder outlet conical shell in the upper part of the inlet area, the gas-solid fluid is prone to form a short-circuit channel and is unevenly distributed, easily forming cross-flow, turbulence, and even local dead zones, reducing the separation quality. Summary of the Invention

[0009] The purpose of the present invention is to provide a powder separator for powder materials to solve the following technical problems: problems such as wind short-circuit, particle impact, and uneven separation existing in the traditional structure:

[0010] A powder separator for powder materials includes an annular volute and a classification zone arranged inside it. The classification zone includes:

[0011] Multiple guide vanes are arranged in an annular array inside the annular volute, and the angles of the guide vanes are adjustable according to different particle sizes;

[0012] A base flow guide cone is installed on the bottom of the guide vanes;

[0013] A rotating cage is rotatably installed inside the annular volute and is located at the center inside the multiple guide vanes;

[0014] Materials enter the base flow guide cone and flow upward; the annular air flow sent in from the periphery by the annular volute enters the rotating cage after the tangential angle is regulated by the guide vanes, and separation occurs under the action of the rotation of the rotating cage.

[0015] As a further scheme of the present invention: it further includes:

[0016] A coarse powder outlet cone shell is fixedly installed at the bottom of the annular volute, and the coarse particles slide out naturally after classification;

[0017] A powder inlet tube is fixedly installed inside the coarse powder outlet cone shell, and the materials enter through the vertical channel sent by the main air from the bottom;

[0018] An elbow fine powder outlet pipe is arranged at the top of the annular volute and is connected to an external air extraction system to form a fine powder discharge path.

[0019] As a further scheme of the present invention: an upper flange is fixedly installed at the center of the top of the annular volute, and an elbow fine powder outlet pipe is fixedly installed at the center of the upper flange;

[0020] A guide vane adjusting guide ring is rotatably connected to the outer peripheral surface of the upper flange. By rotating the guide vane adjusting guide ring, multiple guide vanes are synchronously driven to swing.

[0021] As a further scheme of the present invention: a connecting shaft is vertically installed at the top of the guide vane. The connecting shaft passes through the upper flange and is fixedly connected to a horizontally arranged connecting block, and a pin shaft is vertically installed on the connecting block;

[0022] A plurality of sliding grooves are arranged in an annular array on the guide vane adjusting guide ring, and each sliding groove is matched with the pin shaft.

[0023] As a further scheme of the present invention: a transmission shaft is rotatably connected to the top of the guide vane, and the bottom of the transmission shaft is fixedly connected to the base flow guide cone.

[0024] As a further scheme of the present invention: the guide vane is in a water droplet shape.

[0025] As a further scheme of the present invention: the base flow guide cone includes a ring, a plurality of reinforcing plates are arranged in a circumferential array on the inner wall of the ring, a gap is formed between adjacent two reinforcing plates, and the other ends of the reinforcing plates are all installed on a hollow cone.

[0026] As a further solution of the present invention: a cone is arranged inside the rotary cage, a rotor fixing pin shaft is fixedly installed at the top of the cone, and the rotor fixing pin shaft penetrates through the elbow fine powder outlet pipe and is connected to the motor.

[0027] As a further solution of the present invention: the cross-section of the rotary cage is a trapezoid with a wider upper part and a narrower lower part.

[0028] As a further solution of the present invention: the powder inlet cylinder, the base guide cone, and the rotary cage are coaxially arranged.

[0029] Advantages of the present invention:

[0030] The present invention first proposes a "dynamic powder selection channel with inner-ring air supply for materials - outer-ring discharge of coarse materials" type, constructs a complete spiral shear flow field; an external annular auxiliary air supply fan is provided to enhance the shear before the rotary cage and the particle residence path, avoiding sorting dead angles; the angle of the guide vane is adjustable to adapt to different particle size / capacity requirements and improve the working condition matching; the paths of coarse and fine powders are completely separated, and the fine powder no longer impacts the coarse material discharge pipeline at the center, significantly reducing the wear risk; the ratio of the main air and the circulating air can be adjusted through the double-fan control system to achieve refined classification adjustment. Description of the drawings

[0031] The present invention will be further described below with reference to the drawings.

[0032] Figure 1 is the overall structural schematic diagram of the present invention;

[0033] Figure 2 is the exploded structural schematic diagram of the present invention;

[0034] Figure 3 is the sectional structural schematic diagram of the present invention;

[0035] Figure 4 is the sectional structural schematic diagram of the present invention along A-A;

[0036] Figure 5 is the overall structural schematic diagram of the guide vane of the present invention;

[0037] Figure 6 is the overall structural schematic diagram of the guide vane adjusting guide ring of the present invention;

[0038] Figure 7 is the overall structural schematic diagram of the base guide cone of the present invention;

[0039] Figure 8 is the overall structural schematic diagram of the rotary cage of the present invention.

[0040] In the figure: 1. Elbow fine powder outlet pipe; 2. Guide vane adjusting guide ring; 21. Slide groove; 3. Upper flange; 4. Rotating cage; 41. Cone; 5. Rotor fixing pin shaft; 6. Guide vane; 61. Connecting shaft; 62. Connecting block; 63. Pin shaft; 64. Transmission shaft; 7. Base flow guiding cone; 71. Reinforcing plate; 72. Hollow cone; 73. Ring; 8. Annular volute; 9. Powder inlet cylinder; 10. Coarse powder outlet cone shell. Detailed implementation mode

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0042] Please refer to Figures 1 to 4 As shown, the present invention is a powder separator for powder materials, including an elbow fine powder outlet pipe 1: located at the top of the equipment, connected to an external air extraction system to form a fine powder discharge path. The elbow fine powder outlet pipe 1 can be used in combination with a cyclone dust collector or a bag dust collector to improve the fine powder recovery rate; a guide vane adjusting guide ring 2: used to adjust the angle of the guide vane to adapt to different sorting working conditions; an upper flange 3: connecting the guiding structure and the upper cover of the shell; a rotating cage 4: the core classification structure, where particles are subjected to rotational centrifugal force to achieve coarse and fine classification; a rotor fixing pin shaft 5: used to connect and fix the rotating cage blade structure to the rotating shaft; a guide vane 6: arranged on the outer ring of the rotating cage, strengthening the shear through the air flow guiding effect; a base flow guiding cone 7: realizing the upward guiding of materials into the classification area; an annular volute 8: forming an annular air supply channel and evenly distributing the air flow. The air supply channel of the annular volute 8 can adopt multiple segmented air supply ports according to the particle density type to achieve multi-stage shear control; a powder inlet cylinder 9, which is fixedly installed in the coarse powder outlet cone shell 10, and the material enters from the bottom through the vertical channel sent by the main air; a coarse powder outlet cone shell 10, which is fixedly installed at the bottom of the annular volute 8, and the coarse particles naturally slide and discharge after classification.

[0043] This solution has the following advantages: 1. Avoid the phenomenon of air short circuit, improve the steepness of the classification interface, make the particle size control more stable, and improve the sorting accuracy; 2. Significantly reduce the impact wear of the outlet, and extend the service life of the equipment; 3. The angle of the guide vane and the air inlet of the annular volute are adjustable, effectively realizing the strengthening of side air inlet shear and rectification; 4. The overall equipment structure is compact and easy to maintain, suitable for new construction or renovation project occasions.

[0044] Specifically, a grading area is provided inside the annular volute 8. The grading area includes: a plurality of guide vanes 6, which are arranged in an annular array inside the annular volute 8, and the angles of the guide vanes 6 are adjustable according to different particle sizes; to adapt to different particle size / capacity requirements and improve the working condition matching; a base flow guiding cone 7, which is installed on the bottom of the guide vanes 6; a rotating cage 4, which is rotatably installed inside the annular volute 8 and is located at the center inside the plurality of guide vanes 6;

[0045] At the center of the top of the annular volute 8, an upper flange 3 is fixedly installed, and at the center of the upper flange 3, an elbow fine powder outlet pipe 1 is fixedly installed;

[0046] Refer to Figure 5 As shown, a guide vane adjusting guide ring 2 is rotatably connected to the outer peripheral surface of the upper flange 3. The guide vane adjusting guide ring 2 is provided with bolt holes. By rotating the guide vane adjusting guide ring 2, a plurality of guide vanes 6 are synchronously driven to swing. A connecting shaft 61 is vertically installed at the top of the guide vane 6. The connecting shaft 61 penetrates through the upper flange 3 and is fixedly connected to a horizontally arranged connecting block 62. A pin shaft 63 is vertically installed on the connecting block 62; Refer to Figure 6 As shown, a plurality of sliding grooves 21 are formed in an annular array on the guide vane adjusting guide ring 2, and each sliding groove 21 cooperates with the pin shaft 63.

[0047] Specifically, by rotating the guide vane adjusting guide ring 2, a plurality of guide vanes 6 are synchronously rotated through the pin shaft 63, and then their angles are adjusted. Then, the adjusting guide ring 2 is fixed by bolts to prevent it from returning to its original position. The structure of the guide vanes 6 can also adopt an electric adjusting device to adjust the angle online and improve the adaptive performance.

[0048] The top of the guide vane 6 is rotatably connected to a transmission shaft 64. The bottom of the transmission shaft 64 is fixedly connected to the base flow guiding cone 7. On the one hand, it is beneficial to the angle adjustment of the guide vane 6, and on the other hand, it is beneficial to the support of the base flow guiding cone 7.

[0049] The guide vane 6 is in a water droplet shape, which reduces wear and improves the service life.

[0050] Refer to Figure 7 As shown, the base flow guiding cone 7 includes a circular ring 73. A plurality of reinforcing plates 71 are arranged in a circumferential array on the inner wall of the circular ring 73. A gap is formed between adjacent two reinforcing plates 71 for the upward flow of materials. The other ends of the reinforcing plates 71 are all installed on a hollow cone 72.

[0051] Refer to Figure 8As shown in the figure, a cone 41 is arranged inside the rotating cage 4. A rotor fixing pin shaft 5 is fixedly installed at the top of the cone 41. The rotor fixing pin shaft 5 passes through the elbow fine powder outlet pipe 1 and is connected to the motor. The upper opening of the rotating cage 4 contacts the upper flange 3. The motor drives the rotor fixing pin shaft 5 to rotate, and then drives the rotating cage 4 to rotate to achieve separation.

[0052] The cross-section of the rotating cage 4 is a trapezoid or a cone with a wider upper part and a narrower lower part, as well as a multi-stage classification cavity, which will affect the flow field to adapt to the requirements of high-precision sorting. The powder inlet cylinder 9, the base guide cone 7, and the rotating cage 4 are coaxially arranged.

[0053] The working principle of the present invention: The material is carried by the main air and enters the base guide cone 7 from the powder inlet cylinder 9, and flows upward along a spiral path. The annular air flow sent by the annular volute 8 on the periphery enters the classification area after the tangential angle is regulated by the guide vane 6, forming a strong shear and swirling structure.

[0054] The particles are separated according to the differences in particle size, density, and air flow velocity under the action of the rotation of the rotating cage 4. The fine particles are sucked into the elbow fine powder outlet pipe 1 and discharged after passing through the rotating cage blades. The coarse particles cannot enter the air outlet pipe with the main flow, slide down along the inner wall around the rotor, and are discharged through the coarse powder outlet cone shell 10 to complete the sorting process.

[0055] The above has described a specific embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A powder classifier for powder materials, comprising an annular volute (8) and a grading zone arranged inside the volute, characterized in that: The classification area includes: A plurality of guide blades (6) are arranged in an annular array inside the annular volute (8), and the angles of the guide blades (6) are adjustable according to different particle sizes; A base guide cone (7) mounted on the bottom of the guide vane (6); A rotating cage (4) is rotatably mounted in the annular volute (8) and is located at the inner center of the plurality of guide blades (6); The material enters the guide cone (7) of the base and flows upward; the annular airflow sent in from the outer periphery by the annular volute (8) enters the rotating cage (4) through the guide blades (6) to adjust the tangential angle, and is separated under the rotation of the rotating cage (4).

2. A powder classifier for powder materials according to claim 1, characterized in that: Also includes: A coarse powder outlet cone shell (10) is fixedly mounted on the bottom of the annular volute (8), and the coarse particles naturally slide down and are discharged after classification; A powder inlet cylinder (9) is fixedly mounted in the coarse powder outlet cone shell (10), and the material is fed into the vertical channel from the bottom by the main air; The elbow fine powder outlet pipe (1) is arranged at the top of the annular volute (8) and is connected to an external exhaust system to form a fine powder discharge path.

3. A powder classifier for powder materials according to claim 1, characterized in that: An upper flange (3) is fixedly mounted at the top center of the annular volute (8), and an elbow fine powder outlet pipe (1) is fixedly mounted at the center of the upper flange (3); A guide blade adjustment guide ring (2) is rotatably connected to the outer peripheral surface of the upper end flange (3); the guide blade adjustment guide ring (2) is rotated to synchronously drive the plurality of guide blades (6) to swing.

4. A powder classifier for powder materials according to claim 3, characterized in that: A connecting shaft (61) is vertically mounted on the top of the guide blade (6), the connecting shaft (61) passes through the upper flange (3) and is fixedly connected to a horizontally arranged connecting block (62), and a pin shaft (63) is vertically mounted on the connecting block (62); The guide blade adjustment guide ring (2) is provided with a plurality of slide grooves (21) in an annular array, and each slide groove (21) cooperates with a pin shaft (63) to drive the guide blade (6) to swing via the pin shaft (63).

5. A powder classifier for powder materials according to claim 1, characterized in that: The top of the guide blade (6) is rotatably connected to a transmission shaft (64), and the bottom of the transmission shaft (64) is fixedly connected to a base guide cone (7).

6. A powder classifier for powder materials according to claim 1, 4 or 5, characterized in that: The guide blade (6) is in the shape of a water drop.

7. A powder classifier for powder materials according to claim 1, characterized in that: The base guide cone (7) comprises a circular ring (73), a plurality of reinforcing plates (71) are arranged in a circular array on the inner wall of the circular ring (73), a gap is formed between two adjacent reinforcing plates (71), and the other ends of the reinforcing plates (71) are all mounted on the hollow cone (72).

8. A powder classifier for powder materials according to claim 1, characterized in that: A cone (41) is arranged inside the rotating cage (4), and a rotor fixing pin (5) is fixedly installed on the top of the cone (41). The rotor fixing pin (5) passes through the elbow fine powder outlet pipe (1) and is connected to the motor.

9. A powder classifier for powder materials according to claim 8, characterized in that: The cross section of the rotating cage (4) is a trapezoid that is wide at the top and narrow at the bottom.

10. A powder classifier for powder materials according to claim 2, characterized in that: The powder inlet cylinder (9), the base guide cone (7) and the rotating cage (4) are coaxially arranged.

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