CN117139158A

CN117139158A - Coarse and fine sorting mechanism of classifying powder concentrator and application thereof

Info

Publication number: CN117139158A
Application number: CN202311018331.3A
Authority: CN
Inventors: 豆海建; 王维莉; 李铭哲; 刘智涛
Original assignee: Tianjin Cement Industry Design and Research Institute Co Ltd
Current assignee: Tianjin Cement Industry Design and Research Institute Co Ltd
Priority date: 2023-08-14
Filing date: 2023-08-14
Publication date: 2023-12-01

Abstract

The invention discloses a thickness sorting mechanism of a classifying powder concentrator and application thereof, wherein the thickness sorting mechanism comprises a wind distribution area and a pre-scattering and coarse particle classifying area which are connected from bottom to top; the air distribution and distribution area comprises an air inlet shell, an air inlet, a coarse particle outlet, a guide cone and an annular air ring, the pre-scattering and coarse particle classification area comprises a coarse particle separation shell, a coarse particle separation rotating cage, a distribution device and a coarse particle separation drive, a material lifting table is arranged between the coarse particle separation shell and the air inlet shell, and the material lifting table is correspondingly positioned at the outer side of the outlet of the distribution area, and the lower side of the material lifting table is close to the annular air ring; the coarse particle sorting drive is connected with the coarse particle sorting rotating cage and the distribution disc frustum through a shafting I and is used for driving the coarse particle sorting rotating cage and the distribution disc frustum to rotate. The invention has the functions of scattering, distributing and separating coarse and fine particles, can be well matched with a traditional dynamic powder concentrator, can finish clearer particle separation, and solves a series of problems caused by V-separation commonality.

Description

Coarse and fine sorting mechanism of classifying powder concentrator and application thereof

Technical Field

The invention relates to the technical field of powder selection, in particular to a coarse and fine sorting mechanism of a classifying powder selector and application thereof.

Background

In the grinding process, since material bed extrusion equipment such as a roller press and a vertical roller mill is more suitable for crushing particles with larger particle size (d is more than 0.2 mm), too fine materials are difficult to form a stable material bed to cause equipment vibration, idle work is increased, energy consumption is higher, and meanwhile, water spraying for stabilizing the material bed also influences the quality of a finished product; the fine grinding equipment such as a tube mill, a stirring mill and the like is more suitable for grinding particles with smaller particle diameters (d is smaller than 0.2 mm), the grinding efficiency is easy to be reduced due to excessive coarse materials, large particles run out, and the fineness requirement of the finished product cannot be met. Accordingly, in a combined/semi-finishing system consisting of an extrusion device and a fine grinding device, corresponding demands are made on the classification of the coarse and fine gradients.

In the traditional combined/semi-finished grinding system, the material pre-ground by a roller press is brought into a fine dynamic powder concentrator by a V-shaped powder concentrator for separation. The V-shaped powder concentrator completely depends on an inertial force field to realize semi-finished product classification, the controllability of the separation process is poor, and the common problem of local high wind speed caused by wind short circuit exists at the top of the V-shaped powder concentrator, so that a large amount of coarse particles directly enter the fine dynamic powder concentrator, on one hand, the concentration of the powder concentrated by the dynamic powder concentrator is increased, on the other hand, the rotation speed of the powder concentrator is necessarily increased under the condition of controlling the fineness of the same finished product due to the entering of the coarse particles, and further, the efficiency of the powder concentrator is reduced, the cyclic load is increased, the definition of the separated powder is reduced, more finished products return to a roller compactor, and the material layer is unstable, the vibration and grinding efficiency of a mill are reduced, the time of the mill is reduced, and the electricity consumption is increased; meanwhile, the powder return of the dynamic powder selecting machine entering the tube mill is also caused by the fact that coarse particles with the diameter of more than 0.2mm entering the roller press are mixed, so that the grinding load of the tube mill is increased, the circulating load is increased, the powder selecting efficiency and the grinding efficiency are reduced, and further the station time is reduced and the power consumption is increased.

Disclosure of Invention

In order to solve the above series of problems caused by poor V-selection coarse and fine separation in the existing combined/semi-final grinding system, the invention provides a coarse and fine separation mechanism of a classifying powder machine and application thereof, wherein the coarse and fine separation mechanism has the functions of scattering, distributing and separating coarse and fine particles, is sequentially provided with an air distribution area and a pre-scattering and coarse particle classification area from bottom to top, can be well matched with a traditional dynamic powder classifier to finish clearer particle separation, solves a series of problems caused by V-selection commonality, returns coarse particles (d is more than 0.2 mm) to a material bed extrusion device, returns coarse powder (d is more than 0.045mm and less than 0.2 mm) to a fine grinding device, and further is better adapted to the traditional combined/semi-final grinding system as a finished product to meet the requirements of materials with different fineness.

The invention is realized in such a way that the thickness sorting mechanism of the classifying powder concentrator comprises a wind distribution area and a pre-scattering and coarse particle classifying area which are connected from bottom to top;

the air distribution area comprises an air inlet shell, an air inlet, coarse particle outlets, a guide cone and an annular air ring, wherein the air inlet is positioned on the side face of the air inlet shell, the coarse particle outlets are positioned at the bottom of the air inlet shell, the guide cone is positioned inside the air inlet shell and is coaxially arranged, and the annular air ring is arranged between the upper outer edge of the guide cone and the inner edge of the top of the air inlet shell;

The pre-scattering and coarse particle classifying area comprises a coarse particle classifying shell, a coarse particle classifying rotating cage, a distributing device and a coarse particle classifying drive, wherein the coarse particle classifying rotating cage is positioned in the coarse particle classifying shell and comprises coarse particle classifying blades positioned around, a cage frustum coaxially arranged in the coarse particle classifying blades and scattering round steel positioned at the upper part of the inner side of the cage frustum, an upper annular plate is arranged at the top of the coarse particle classifying rotating cage, a middle annular plate is arranged at the middle part of the coarse particle classifying rotating cage, a lower annular plate is arranged at the bottom of the coarse particle classifying rotating cage, and coarse particle classifying blades are positioned among the upper annular plate, the middle annular plate and the lower annular plate, close to the outer edges of the upper annular plate, the middle annular plate and the lower annular plate and are uniformly radially distributed; the upper parts of the coarse particle sorting shell and the coarse particle sorting blades are provided with supporting cover plates, the bottom surfaces of the supporting cover plates are fixedly connected with the coarse particle sorting shell, and the bottom surfaces of the supporting cover plates are connected with the upper ring plates of the coarse particle sorting rotating cages in a dynamic sealing mode to form rotating cage external sealing of the coarse particle sorting rotating cages; the supporting cover plate, the coarse particle sorting shell and the coarse particle sorting blades form a coarse particle sorting area together;

the top of the cage frustum is connected with a feeding pipe, and the feeding pipe is connected with the cage frustum in a dynamic sealing mode to form a rotary cage inner seal of the coarse particle sorting rotary cage; the material distribution device is coaxially arranged below the cage frustum, and a material scattering area is formed at the upper part and a material distribution area is formed at the lower part between the material distribution device and the cage frustum; a material lifting table is arranged between the coarse particle sorting shell and the air inlet shell, and is correspondingly positioned at the outer side of the outlet of the material distribution area, and the lower side of the material lifting table is close to the annular air ring; the top surface of the supporting cover plate is connected with an outlet air pipe of the coarse particle sorting rotating cage;

The coarse particle sorting drive is connected with the coarse particle sorting rotating cage and the distribution disc frustum through a shafting I and is used for driving the coarse particle sorting rotating cage and the distribution disc frustum to rotate.

Preferably, the bottom surface of the support cover plate is fixedly connected with an outer sealing outer ring positioned at the outer side of the upper ring plate and an outer sealing inner ring positioned at the inner side of the upper ring plate, the outer sealing outer ring and the outer sealing inner ring are matched with the upper ring plate to form a rotating cage outer seal, the rotating cage outer seal is a dynamic seal, and the dynamic seal clearance of the rotating cage outer seal is 10-20 mm;

the rotary cage inner sealing ring is arranged at the position, close to the feeding pipe, of the upper outer edge of the rotary cage frustum, the rotary cage inner sealing ring is matched with the feeding pipe to form a rotary cage inner seal of the coarse particle sorting rotary cage, the rotary cage inner seal is a dynamic seal, the dynamic seal clearance of the rotary cage inner seal is 10-20 mm, and the radial positions of the rotary cage inner sealing ring and the feeding pipe are interchangeable.

Preferably, the coarse particle sorting rotating cage and the distributing device are driven together by the same driving device, at this time, the first shafting comprises a main shaft and a main shaft sleeve sleeved on the main shaft, a hub is arranged at the top of the main shaft, the upper part of the hub is connected with the scattering round steel, the lower part of the hub is connected with the distributing device, and an anti-wear cap is arranged at the top of the hub.

Preferably, the coarse particle sorting rotating cage and the material distributing device are respectively and independently driven by two drives, at the moment, the coarse particle sorting drive comprises an independent drive I and an independent drive II, the shafting I comprises an inner transmission shaft and an outer transmission sleeve shaft, the upper end of the inner transmission shaft is connected with the scattering round steel through a hub, and the lower end of the inner transmission shaft is connected with the independent drive I; the outer transmission sleeve is sleeved on the inner transmission shaft, the upper end of the outer transmission sleeve is connected with the material distribution device, and the lower end of the outer transmission sleeve is connected with the independent driving device II through the belt pulley group.

Preferably, the material distributing device is composed of a material distributing disc frustum and a material distributing disc bottom plate, the material distributing disc frustum is positioned below the cage frustum, the outer edge of the bottom end of the material distributing disc frustum is connected with the material distributing disc bottom plate, and a material flow material distributing channel is formed between the material distributing disc bottom plate and the lower annular plate; the cloth tray bottom plate is far from the gap H of the lower annular plate ₂ 250-350 mm, the bottom plate of the cloth tray is away from the outlet gap H of the annular air ring ₃ The outer diameter D of the bottom plate of the distributing plate is 50-150 mm ₂ Diameter D of coarse particle sorting rotating cage ₁ The size is 0-50 mm smaller; height H of the material lifting table ₅ The included angle theta between the material lifting table and the horizontal direction is 1.1 to 1.3 times of the gap between the lower annular plate and the annular air ring outlet ₄ 45-55 degrees; when the coarse particle sorting rotating cage and the material distributing device are driven together by the same drive, distributing round steel is uniformly distributed on one circle of the material flow distributing channel, the top end of the distributing round steel is connected with the lower annular plate, and the bottom end of the distributing round steel is connected with the bottom plate of the distributing plate;

the outer edge of the lower side of the bottom plate of the distribution plate is fixedly connected with a dynamic sealing outer ring of the distribution device, a dynamic sealing inner ring of the distribution device is arranged on the inner ring of the annular air ring, the dynamic sealing outer ring of the distribution device and the dynamic sealing inner ring of the distribution device form dynamic sealing of the distribution device, and the dynamic sealing gap of the dynamic sealing of the distribution device is 10-20 mm.

Preferably, the feeding pipe is positioned right above the center of the coarse particle sorting rotating cage, the feeding pipe is communicated with the inside of the cage frustum, and a dust-containing airflow ascending channel is formed between the feeding pipe and an outlet air pipe of the coarse particle sorting rotating cage;

the diameter D of the feeding pipe ₄ (mm)：

Wherein P is the design yield (t/h) of the system, the cyclic load k=3+/-1 of the system, and the material volume weight ρ _s ＝1.5～1.8(t/m ³ ) Flow velocity V of material _s Material filling rate epsilon=0.5 to 0.8, wherein =1±0.5 (m/s);

diameter D of coarse particle sorting rotating cage ₁ (mm)：

Wherein the diameter-to-height ratio D/H of the coarse particle sorting rotating cage is 1.8-2.0, and the radial wind speed V of the coarse particle sorting rotating cage ₂ 1.5 to 2.5m/s; q is the system powder selecting air quantity (m) ³ /h)；

Wherein P is the design yield (t/h) of the system, the cyclic load k=3+ -1 of the system, and the concentration C of the selected powder _s ＝800±200g/m ³ Feed concentration F _s ＝2.5±0.5kg/m ³ 。

Diameter D of air pipe at outlet of coarse particle sorting rotating cage ₃ (mm)：

Wherein, the outlet wind speed V of the coarse particle sorting rotating cage ₁ 10-15 m/s;

coarse particle sorting shell and included angle theta in horizontal direction ₆ The diameter D of the upper end of the inner cavity of the coarse particle sorting shell is 65-75 DEG ₅ Diameter D of coarse particle sorting rotating cage ₁ 300-500 mm in size.

Preferably, the upper ring plate is connected with the cage frustum through a rotating cage pull rod, and the arrangement direction of the rotating cage pull rod is consistent with the rotation direction of the coarse particle sorting rotating cage and is uniformly distributed along the axis of the coarse particle sorting rotating cage; the inner edge of the lower annular plate is connected with the cage frustum; the inner edge of the middle ring plate is connected with the cage frustum through a pull rod or a rib plate.

Preferably, the air inlet is connected with classifying equipment or grinding equipment, and the dust-containing airflow to be separated is introduced into the air inlet shell in an air sweeping mode.

Preferably, an annular step-shaped scattering device or an annular Z-shaped scattering device is arranged below the annular air ring and in the inner cavity of the air inlet shell;

the scattering plates of the annular 'ladder' -shaped scattering device are arranged in a ladder-shaped structure overlapped at a certain interval, the projection overlapping distance of bus bars of two adjacent scattering plates is 100-200 mm, and each scattering plate is respectively supported on the inner wall of the air inlet shell through a supporting device;

A part of the scattering plates of the annular Z-shaped scattering device are supported on the inner wall of the air inlet shell through the supporting device, a part of the scattering plates are supported on the outer wall of the flow guide cone through the supporting device, the scattering plates on two sides are respectively arranged in a stepped structure with a certain interval overlapped, scattering classification channels are formed between two adjacent scattering plates on two sides and correspond to each other, and the distance between the projection points of the tail end of the upper scattering plate on the tail end of the lower scattering plate and the tail end of the scattering plate is 100-200 mm; the inclined angle theta between each scattering plate of the annular ladder-shaped scattering device and the annular Z-shaped scattering device and the horizontal direction ₇ 40-50 deg..

Preferably, the annular wind ring comprises a wind ring inner ring, a wind ring outer ring and a plurality of wind ring wind guide blades obliquely arranged between the wind ring inner ring and the wind ring outer ring; the diameter D of the top of the inner ring of the wind ring ₆ Outer diameter D of bottom plate of cloth tray ₂ The angle theta between the inner ring of the wind ring and the horizontal direction is 40-60 mm smaller ₁ 50-70 degrees;

the diameter of the outer ring of the wind ring or the inner diameter D of the air inlet shell ₇ (mm)：

Wherein V is ₃ Is the outlet wind speed (m/s) of the annular wind ring, D ₆ The diameter (mm) of the top of the inner ring of the air ring is that of the powder selecting air quantity (m) of the system is Q ³ /h)；

The number n (number) of wind-guiding blades of the wind ring:

wherein n is rounded to an integer;

Annular wind ring height H ₄ (mm)：

Wherein θ ₂ S is the included angle (DEG) between the wind ring wind guide blade and the horizontal direction ₁ /S ₂ The ratio of the horizontal projection overlapping length of two adjacent wind-ring wind-guiding blades to the horizontal projection length of a single wind-ring wind-guiding blade is given, and t is the thickness of the wind-ring wind-guiding blade;

the outlet wind speed V of the annular wind ring ₃ The gap wind speed V of the wind ring wind guide blade is 8-12 m/s ₄ Is 18+/-2 m/s, and the included angle theta between the wind ring wind guide blade and the horizontal direction ₂ The thickness t of the wind guiding blades of the wind ring is 10-20 mm and the gap d between two adjacent wind guiding blades of the wind ring is 35-45 degrees ₁ The horizontal projection overlapping length S of two adjacent wind ring wind guiding blades is 100-200 mm ₁ Horizontal projection length S of single wind ring wind guiding blade ₂ Ratio S of (2) ₁ :S ₂ ＝0.3～0.8。

Preferably, the bottom end of the diversion cone is connected with a coarse material diversion cone, and the diversion cone forms an included angle theta with the horizontal direction ₃ 50-70 DEG, and the included angle theta between the coarse material guide cone and the horizontal direction ₅ 55-65 degrees;

diameter D of interface between diversion cone and coarse material diversion cone ₈ (mm)：

Wherein V is ₅ The wind speed is raised for the air inlet, and the wind speed V is raised for the air inlet ₅ 3 to 5m/s.

The invention has the advantages and positive effects that:

the coarse particle sorting rotating cage is arranged, and the forced vortex field formed by independent driving of the coarse particle sorting rotating cage can completely shield coarse particles, so that after the coarse particle sorting mechanism is matched with a traditional dynamic powder sorting machine, coarse particles do not enter a subsequent fine powder classification process, coarse, medium and fine gradient classification can be realized, and the grinding requirements of different equipment in a combined/semi-final grinding system are met; the coarse particle sorting rotating cage is arranged, and the scattering round steel in the coarse particle sorting rotating cage can break up a cake formed by extruding through the material bed extruding equipment, so that the huge height difference required by static scattering is shortened, the floor height is reduced, and the civil engineering cost is saved; a material distribution device is arranged below the coarse particle sorting rotating cage, so that broken material cakes can be uniformly thrown to the annular air ring, and sedimentation of coarse particles at the annular air ring and lifting of coarse powder and fine powder are facilitated; the flow guiding cone and the annular air ring are arranged, compared with a traditional V-shaped powder concentrator, the air flow field is more uniform in distribution, coarse particle cutting particle size is more definite, coarse particles brought into a separation area are reduced, circulation load and material concentration are reduced, equipment resistance is reduced, and power consumption of a circulation fan is reduced. The coarse and fine sorting mechanism has compact structure, solves the problem of uneven airflow and material flow of the traditional V-shaped powder concentrator, can realize accurate classification of coarse particles, coarse powder and fine powder after being matched with the traditional dynamic powder concentrator, has performance completely superior to that of the traditional V-shaped powder concentrator and the traditional fine dynamic powder concentrator in series connection mode, and can be replaced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the thickness sorting mechanism of the present invention;

FIG. 2 is a view A-A of FIG. 1;

FIG. 3 is a view B-B of FIG. 1;

FIG. 4 is a schematic view of the structure of the coarse particle sorting rotor of the present invention independently driven from the distributing device;

FIG. 5 is a partial detail view of section A of FIG. 4 in accordance with the present invention;

FIG. 6 is a partial detail view of section B of FIG. 4 of the present invention;

FIG. 7 is a partial detail view of section C of FIG. 4 in accordance with the present invention;

FIG. 8 is a schematic diagram of the structure of the coarse and fine sorting mechanism of the present invention for introducing a dust-laden air stream in a wind sweep;

FIG. 9 is a schematic view of the annular "step" shaped scattering device of the present invention;

FIG. 10 is a schematic view of the structure of the annular "Z" shaped scattering device of the present invention;

FIG. 11 is a schematic diagram of the configuration of the coarse and fine separator of the present invention in combination with a conventional dynamic classifier;

FIG. 12 is a schematic view of process configuration parameters of the coarse and fine sorting mechanism of the present invention;

FIG. 13 is a schematic view of process parameters of the annular "step" shaped breaking device of the present invention;

FIG. 14 is a schematic view of the process parameters of the annular "Z" shaped breaking device of the present invention.

Wherein: 1. an air inlet; 2. an outer ring of the wind ring; 3. wind ring wind guide vanes; 4. an inner ring of the wind ring; 5. coarse particle sorting rotating cage; 6. a material distribution device; 7. coarse particle sorting shell; 8. a feeding pipe; 9. an outlet air pipe of the particle sorting rotating cage; 10. the air distribution and distribution area and the pre-scattering and coarse particle classification area; 11. an upper bearing seat; 12. a rotating cage pull rod; 13. scattering round steel; 14. a hub; 15. an anti-wear cap; 16. sealing in a rotating cage; 16-1, a rotating cage inner sealing ring; 17. an upper ring plate; 18. sealing the outer part of the rotating cage; 18-1, an outer sealing ring; 18-2, an outer seal inner ring; 19. supporting the cover plate; 20. a middle ring plate; 21. coarse particle classification blades; 22. a lower ring plate; 23. distributing round steel; 24. a cloth tray bottom plate; 25. an annular wind ring; 26. an upper bearing support table; 27. an air inlet shell; 28. a coarse particle outlet; 29. a drive device base; 30. a cloth disc frustum; 31. a cage frustum; 32. a bearing seat support; 33. ear plates; 34. a material lifting table; 35. a spindle sleeve; 36. a diversion cone; 37. a lower bearing seat; 38. a coarse material guide cone; 39. a foundation support; 40. a support flange; 41. a main shaft; 42. coarse particle sorting driving; 43. an inner drive shaft; 44. an outer drive sleeve; 45. a belt pulley set; 46. independent driving is carried out; 47. independent driving is performed; 48. classification equipment or grinding equipment; 49. a support device; 50. connecting rib plates; 51. annular step-shaped scattering device; 52. a scattering plate; 53. an annular Z-shaped scattering device; 54. the distributing device dynamically seals the outer ring; 55. the inner ring is dynamically sealed by the material distributing device.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Examples

Referring to fig. 1 to 11, an embodiment of the present invention provides a coarse-fine separation mechanism of a classifying powder separator, which includes a wind distribution area and a pre-scattering and coarse-particle classifying area connected from bottom to top.

The air distribution and distribution area is positioned at the bottom and comprises an air inlet shell 27, an air inlet 1, a coarse particle outlet 28, a flow guide cone 36 and an annular air ring 25, wherein the air inlet shell 27 surrounds the outermost part to form a closed flow guide scattering and sorting space, the air inlet shell 27 is positioned above a foundation support 39, and the air inlet shell and the coarse particle outlet are connected into a whole through a support rib plate at the outer side; the air inlet 1 is positioned on the side surface of the air inlet shell 27, and the air inlet mode of the air inlet 1 is tangential air inlet or vertical air inlet; the coarse particle outlets 28 are positioned at the bottom of the air inlet shell 27, a plurality of coarse particle outlets 28 are arranged, and interference with the underlying coarse particle sorting drive 42 is avoided through annular mirror image distribution; the guide cone 36 is positioned in the air inlet shell 27 and is coaxially arranged, and the shape of the guide cone 36 is inverted circular table or cylindrical; the annular wind ring 25 is arranged between the upper outer edge of the guide cone 36 and the top inner edge of the air inlet shell 27, the upper part of the guide cone 36 is closely adjacent to the annular wind ring 25, the outer upper edge of the annular wind ring 25 is close to the lower edge of the material lifting table 34 and closely abuts against the inner wall of the air inlet shell 27, and the inner upper edge of the annular wind ring 25 is connected with the upper bearing seat supporting table 26. The annular wind ring 25 comprises a wind ring inner ring 4, a wind ring outer ring 2, and a plurality of wind ring wind guiding blades 3 obliquely arranged between the wind ring inner ring 4 and the wind ring outer ring 2. The diameter D of the top of the inner ring 4 of the wind ring ₆ Outer diameter D of the base plate 24 of the distribution plate ₂ The included angle theta 1 between the inner ring 4 of the annular wind ring and the horizontal direction is 50-70 degrees and is 40-60 mm smaller, and the wind speed V of the outlet of the annular wind ring ₃ The gap wind speed V of the wind ring wind guiding blade 3 is 8-12 m/s ₄ 18+ -2 m/s; the included angle theta between the wind ring wind guiding blade 3 and the horizontal direction ₂ The thickness t of the wind guiding blades of the wind ring is 10-20 mm and the gap d between two adjacent wind guiding blades of the wind ring is 35-45 degrees ₁ 100-200 mm; adjacent two wind ring wind guiding blades 3 are horizontalRatio S of projection overlap length to horizontal projection length of single wind ring wind guiding blade 3 ₁ :S ₂ ＝0.3～0.8。

The annular wind ring 25 top is the preliminary scattering and coarse grain classification district, preliminary scattering and coarse grain classification district includes coarse grain sorting shell 7, coarse grain sorting rotating cage 5, distributing device 6 and coarse grain sorting drive 42, coarse grain sorting rotating cage 5 is located coarse grain sorting shell 7, coarse grain sorting rotating cage 5 is including being located coarse grain classifying vane 21 all around, being located the cage frustum 31 that coarse grain classifying vane 21 inside coaxial layout and being located the scattering round steel 13 of cage frustum 31 inboard upper portion, scattering round steel 13 is radial equipartition and surface wear-resisting treatment. The top of coarse grain sorting rotating cage 5 sets up ring plate 17, middle part setting up ring plate 20, bottom setting down ring plate 22, coarse grain classifying vane 21 is located between upper ring plate 17, ring plate 20, the lower ring plate 22 to near upper ring plate 17, ring plate 20 and lower ring plate 22 outward border and be even radial distribution. The upper parts of the coarse particle sorting shell 7 and the coarse particle sorting blades 21 are provided with a supporting cover plate 19, the bottom surface of the supporting cover plate 19 is fixedly connected with the coarse particle sorting shell 7, and the bottom surface of the supporting cover plate 19 is connected with the upper ring plate 17 of the coarse particle sorting rotating cage in a dynamic sealing mode to form the rotating cage outer seal 18 of the coarse particle sorting rotating cage. The support cover 19 forms a coarse-particle classification zone together with the coarse-particle classifying housing 7 and the coarse-particle classifying blades 21.

The top of the cage frustum 31 is connected with a feeding pipe 8, and the feeding pipe 8 is connected with the cage frustum 31 in a dynamic sealing mode to form a rotating cage inner seal 16 of the coarse particle sorting rotating cage.

The material distributing device 6 is coaxially arranged below the cage frustum 31, and a material scattering area is formed at the upper part and a material distributing area is formed at the lower part between the material distributing device 6 and the cage frustum 31.

The material distributing device 6 is composed of a material distributing disc frustum 30 and a material distributing disc bottom plate 24, the material distributing disc frustum 30 is coaxially arranged below a cage frustum 31, the outer edge of the bottom end of the material distributing disc frustum 30 is connected with the material distributing disc bottom plate 24, and a material flow material distributing channel is formed between the material distributing disc bottom plate 24 and the lower annular plate 22; by a means ofThe bottom plate of the cloth tray is away from the clearance H of the lower annular plate ₂ 250-350 mm, the bottom plate of the cloth tray is away from the outlet gap H of the annular air ring ₃ The outer diameter D of the bottom plate of the distributing plate is 50-150 mm ₂ Diameter D of coarse particle sorting rotating cage ₁ The size is 0-50 mm smaller; the material flow distribution channel has cloth round steel 23 in a week equipartition, the top of cloth round steel 23 links to each other with lower annular plate 22, and the bottom links to each other with cloth dish bottom plate 24, and cloth round steel 23 is when carrying out the cloth to the material, also is connected as a whole with cloth dish bottom plate 24 and lower annular plate 22. If the coarse grain sorting rotating cage 5 and the distributing device 6 are independently driven, the distributing round steel 23 is canceled.

As shown in fig. 6, the outer edge of the lower side of the bottom plate 24 of the distributing tray is fixedly connected with a dynamic sealing outer ring 54 of the distributing device, the dynamic sealing inner ring 55 of the distributing device is arranged on the inner ring 4 of the annular air ring 25, the dynamic sealing inner ring and the dynamic sealing inner ring form dynamic sealing of the distributing device together, the dynamic sealing gap of the dynamic sealing of the distributing device is 10-20 mm, and materials to be separated are prevented from being discharged out of the system through the inner ring 4 of the air ring and the guide cone 36. Specifically, the dynamic seal inner ring 55 of the distributing device is fixedly connected to the upper edge of the inner ring 4 of the wind ring and abuts against the outer edge of the supporting platform 26 of the upper bearing seat, and the dynamic seal outer ring 54 of the distributing device is fixedly connected to the lower side of the outer edge of the bottom plate 24 of the distributing disc.

A material lifting table 34 is arranged between the coarse particle sorting shell 7 and the air inlet shell 27, and the height H of the material lifting table ₅ The included angle theta between the material lifting table and the horizontal direction is 1.1 to 1.3 times of the gap between the lower annular plate 22 and the annular air ring outlet ₄ 45-55 degrees; the material lifting platform 34 is correspondingly positioned on the outer side of the material flow distribution channel, and the lower side of the material lifting platform is closely adjacent to the annular air ring 25. The top surface of the supporting cover plate is connected with an outlet air pipe 9 of the coarse particle sorting rotating cage.

The coarse particle sorting drive 42 is connected with the coarse particle sorting rotating cage 5 and the distribution disc frustum 30 through a shafting I and is used for driving the coarse particle sorting rotating cage 5 and the distribution disc frustum 30 to rotate; coarse particle sorting drive 42 is positioned directly below guide cone 36. The bottom end of the diversion cone 36 is connected with a coarse material diversion cone 38, and the diversion cone has an included angle theta with the horizontal direction ₃ 50-70 DEG, and the included angle theta between the coarse material guide cone and the horizontal direction ₅ 55-65 DEG, both the guide cone 36 and the coarse material guide cone 38Together isolating the stream and the gas stream from the outside of the shaft system.

Specifically, the feeding pipe 8 is located right above the center of the coarse particle sorting rotating cage 5, the feeding pipe 8 is communicated with the inside of the cage frustum 31, the materials to be sorted are fed into the cage frustum 31 through the feeding pipe 8 for pre-scattering, and the fed material flow is separated from the outside air flow; a dust-containing airflow ascending channel is formed between the feeding pipe 8 and the coarse particle sorting rotating cage outlet air pipe 9. As shown in fig. 7, the inner rotating cage seal 16 is arranged at the position close to the feeding pipe 8 along the periphery of the upper outer edge of the cage frustum 31, and is composed of an inner rotating cage seal ring 16-1 and the feeding pipe 8, the inner rotating cage seal ring 16-1 is arranged at the position close to the feeding pipe 8 along the periphery of the upper outer edge of the cage frustum 31, the inner rotating cage seal ring 16-1 and the feeding pipe 8 are matched to form the inner rotating cage seal 16 of the coarse particle sorting rotating cage, the dynamic seal gap of the inner rotating cage seal 16 is 10-20 mm, coarse powder and materials to be sorted are prevented from entering each other reversely after sorting, and the radial positions of the inner rotating cage seal ring 16-1 and the feeding pipe 8 are interchangeable.

As shown in fig. 5, a rotating cage outer seal 18 is disposed on a periphery of the bottom surface of the support cover plate 19 near the inner and outer edges of the upper ring plate 17, and is composed of an outer seal outer ring 18-1, an outer seal inner ring 18-2 and the upper ring plate 17, wherein the outer seal outer ring 18-1 is fixedly connected to the bottom surface of the support cover plate 19 and is located at the outer edge of the upper ring plate 17, the outer seal inner ring 18-2 is fixedly connected to the bottom surface of the support cover plate 19 and is located at the inner edge of the upper ring plate 17, the outer seal outer ring 18-1 and the outer seal inner ring 18-2 are matched with the upper ring plate 17 to form the rotating cage outer seal 18, and a dynamic seal gap of the rotating cage outer seal 18 is 10-20 mm, so that coarse particles are prevented from directly passing through the coarse particle sorting rotating cage 5 to enter a subsequent sorting process without sorting. The inner seal 16 and the outer seal 18 are both dynamic seals, so that interference collision does not occur during the rotation of the coarse particle sorting rotating cage 5.

As shown in fig. 1, the upper ring plate 17 is connected with the cage frustum 31 through a rotating cage pull rod 12, and the arrangement direction of the rotating cage pull rod 12 is consistent with the rotation direction of the coarse particle sorting rotating cage 5 and is uniformly distributed along the axis of the coarse particle sorting rotating cage 5; the inner edge of the lower ring plate 22 is connected with a cage frustum 31; the outer edge of the middle ring plate 20 is connected with the coarse particle classifying blades 21, the inner edge of the middle ring plate 20 is connected with the cage frustum 31 through a pull rod or a rib plate, and the middle ring plate 20 is used for reinforcing and fixing the coarse particle classifying blades 21; the upper ring plate 17, the middle ring plate 20 and the lower ring plate 22 are respectively positioned at the upper, middle and lower parts of the coarse particle sorting rotating cage 5, and the upper ring plate 17, the middle ring plate 20, the lower ring plate 22, the rotating cage pull rod 12 and the cage frustum 31 jointly form a cage frame.

As shown in fig. 1, the coarse particle sorting rotating cage 5 and the material distributing disc frustum 30 are driven together by the same driving device, at this time, the shafting comprises a main shaft 41 and a main shaft sleeve 35 sleeved on the main shaft 41, a hub 14 is arranged at the top of the main shaft 41, the upper part of the hub 14 is connected with the scattering round steel 13, the lower part of the hub 14 is connected with the material distributing disc frustum 30, and an anti-wear cap 15 is arranged at the top of the hub 14. Specifically, the upper part of the main shaft 41 is supported by a bearing assembly installed in the upper bearing housing 11, and the lower part is supported by a bearing assembly installed in the lower bearing housing 37, which are coaxially arranged; bearing seat supports 32 are arranged around the outer side of the upper bearing seat 11, the bearing seat supports 32 are connected with lug plates 33, the lug plates 33 are connected with the upper bearing seat support table 26, and the radial force is transmitted to the air inlet shell 27 through the upper bearing seat support table 26 and the annular air ring 25; the outer side of the lower bearing seat 37 is provided with a support flange 40, and the support flange 40 is connected with the equipment foundation support 39 and transmits the axial force to the civil engineering foundation through the equipment foundation support 39; the lower part of the equipment foundation support 39 is connected with the driving device base 29, the lower part of the driving device base 29 is connected with the lower coarse particle sorting drive 42, and the lower coarse particle sorting drive 42 is a power source of the whole coarse particle sorting rotating cage 5 and the distribution disc frustum 30.

In order to further realize the precise coarse particle sorting and the optimal material distribution rotating speed requirement, the coarse particle sorting rotating cage 5 and the material distribution disc frustum 30 can be respectively and independently driven, specifically, as shown in fig. 4, the coarse particle sorting rotating cage 5 and the material distribution disc frustum 30 are respectively and independently driven by two drives, at this time, the coarse particle sorting driving comprises an independent driving one 46 and an independent driving two 47, the shafting one comprises an inner transmission shaft 43 and an outer transmission sleeve shaft 44, the upper end of the inner transmission shaft 43 is connected with the scattered round steel 13 through a hub 14, the lower end is connected with the independent driving one 46, and the independent driving one 46 can be used for variable-frequency speed; the outer driving sleeve shaft 44 is sleeved on the inner transmission shaft 43, the upper end of the outer driving sleeve shaft 44 is connected with the cloth disc frustum 30, the lower end of the outer driving sleeve shaft is connected with the independent driving second 47 through the belt pulley group 45, and the independent driving second 47 can regulate the frequency and the speed. Specifically, the inner transmission shaft 43 is supported by upper and lower bearings or upper, middle and lower bearing assemblies matched with the inner transmission shaft, wherein the upper bearing assembly can be positioned at the upper part of the bearing seat 11 of the material distribution disc frustum 30 or can be positioned inside the bearing seat 11 of the material distribution disc frustum 30; the outer drive sleeve 44 is supported by its associated upper and lower bearings or upper, middle and lower bearing assemblies which are located within the bearing housing 11 of the distribution plate cone 30. The coarse particle sorting rotating cage 5 and the material distribution disc frustum 30 can realize independent and adjustable rotating speeds according to different requirements of material distribution and sorting on the rotating speeds, and the whole equipment is in a three-drive mode.

As shown in fig. 8, to further achieve a greater number of stages of classification or ultra-fine classification, a dusty gas stream may be introduced in series with classification or grinding equipment 48 in the form of a wind sweep. Specifically, the air inlet 1 is connected with a classifying device (such as a static powder separator) or a grinding device (such as a wind mill), and introduces the dust-containing air flow to be separated into the air inlet shell 27 in a wind sweeping mode.

To further improve the classification clarity of the coarse and fine particles, specifically, an annular "step" type scattering device 51 (see fig. 9) or an annular "Z" type scattering device 53 (see fig. 10) is disposed below the annular air ring 25 and in the inner cavity of the air inlet housing 27. The scattering plates 52 of the annular ladder-shaped scattering device 51 are all supported on the inner wall of the air inlet shell 27 through the supporting device 49, are arranged in a ladder-shaped structure overlapped at a certain interval, and two adjacent scattering plates 52 are connected through the connecting rib plate 50. The scattering plates 52 of the annular Z-shaped scattering device 53 are partially supported on the inner wall of the air inlet shell 27 through the supporting device 49, and partially supported on the outer wall of the guide cone 36 through the supporting device 49, the scattering plates 52 on two sides are respectively arranged in a stepped structure with a certain interval overlapped, scattering classification channels are formed between two adjacent scattering plates 52 on two sides, and the scattering classification channels correspond to each other. The working principle is as follows: the material falling through the annular air ring 25 falls to the annular step-shaped scattering device 51 or the annular Z-shaped scattering device 53 at a certain falling speed under the action of gravity, is scattered after being impacted by the scattering plates 52 corresponding to each other, is then blasted by ascending air flow between the scattering plates 52, small particles upwards pass through the annular air ring 25 to enter a coarse particle sorting area for sorting again, large particles downwards leave the powder concentrator through the coarse particle outlet 28, enter a coarse particle collecting bin, and are ground again by a grinding host (a roller press, a vertical mill and the like).

The classification process of the coarse and fine separation mechanism of the classification powder separator comprises the following steps:

the material to be sorted is fed into a pre-scattering and coarse particle classifying area through a feeding pipe 8, is scattered onto scattering round steel 13 in a coarse particle sorting rotating cage 5 under the action of an anti-abrasion cap 15, the scattering round steel 13 fully scatters material cakes contained in the material, after the scattering round steel 13 fully scatters the material, the material is completely distributed and uniformly scattered onto a material lifting table 34 through a material distribution disc conical table 30 and a material distribution disc bottom plate 24 which rotate on the lower side, and then falls down to an annular wind ring 25 in the wind distribution area with a certain kinetic energy under the action of gravity, and further impacts the wind ring wind guiding blade under the action of falling kinetic energy and inertia, and is sufficiently scattered again by an annular 'step' -shaped scattering device 51 or an annular 'Z' -shaped scattering device 53 below the wind ring 25, so that fine particles (coarse powder and fine powder) mixed between 'bulk' material flows and fine powder adhered to the surface of the coarse particles are fully scattered and separated; the sorting air flow enters from the air inlet 1 at the lower side of the air distribution area, and is uniformly distributed under the combined action of the coarse material guide cone 38, the guide cone 36 and the air inlet shell 27, the scattered materials are intensively and rapidly blasted to finish the first coarse particle classification, most of coarse particles return to the material bed extrusion equipment to be continuously ground through the coarse particle outlet 28 under the action of gravity, and the small part of coarse particles, the large part of coarse powder and fine powder upwards pass through the annular air ring 25 along with the sorting air flow and enter the coarse particle sorting rotating cage 5 to finish the second coarse particle classification; the coarse particle sorting rotating cage 5 rotates to form a forced vortex field, so that coarse particles can be more accurately controlled from entering a subsequent classification process without passing through the coarse particle classification blades 21; the dust-containing gas stream after sorting (passing through the coarse particle classifying blade 21) is discharged along the dust-containing gas stream rising channel or goes upward into the subsequent fine dynamic powder concentrator.

The process structure parameters of the invention are shown in fig. 12 to 14, and for convenience of description of the design method of the invention, the following main process structure parameters are set:

system design yield P (t/h), material bulk density ρ _s (t/m ³ ) Flow velocity V of material _s (m/s), material filling rate epsilon=0.5-0.8, system circulation load k and powder concentration C _s (g/m ³ ) Feed concentration F _s (kg/m ³ ) System powder air quantity Q (m) ³ /h), coarse particle sorting rotor 5 diameter D ₁ (mm), coarse particle sorting rotor 5 height H ₁ (mm), coarse particle sorting rotor 5 diameter to height ratio D/H, outer diameter D of distributor tray bottom plate 24 ₂ (mm), diameter D of coarse particle sorting rotating cage outlet air pipe 9 ₃ (mm) diameter D of feed tube 8 ₄ (mm), diameter D of upper end of inner cavity of coarse particle sorting housing 7 ₅ (mm), diameter D of inner ring 4 of wind ring ₆ (mm), the diameter of the outer ring 2 of the wind ring or the inner diameter D of the air inlet shell 27 ₇ (mm), diameter D of guide cone 36-coarse material guide cone interface ₈ (mm) the lower ring plate 22 is spaced from the cloth tray bottom plate 24 by a gap H ₂ (mm), the bottom plate 24 of the distributing plate is spaced from the outlet gap H of the annular air ring 25 ₃ (mm), annular wind ring 25 height H ₄ (mm), height H of the material lifting table 34 ₅ (mm) the inner ring 4 of the wind ring forms an angle theta with the horizontal direction ₁ (°), 3 numbers n (number) of wind ring wind guiding blades, 3 thickness t (mm) of wind ring wind guiding blades, 3 included angle theta with horizontal direction ₂ (°), the angle theta between the guide cone 36 and the horizontal direction ₃ (°), the material lifting table 34 forms an angle theta with the horizontal direction ₄ (°), the angle theta between the coarse material guide cone 38 and the horizontal direction ₅ (°), the coarse grain sorting housing 7 forms an angle theta with the horizontal direction ₆ (°), the wind speed V at the outlet of the coarse particle sorting rotating cage 5 ₁ (m/s), radial wind speed V of coarse particle sorting rotating cage 5 ₂ (m/s), the outlet wind speed V of the annular wind ring 25 ₃ (m/s), the gap wind speed (effective wind speed of annular wind ring 25) V of wind ring wind guiding blade 3 ₄ (m/s), the wind inlet 1 increases the wind speed V ₅ (m/s), the blowing wind speed V of the annular step-shaped scattering device ₆ (m/s), the blowing wind speed V of the annular Z-shaped scattering device ₇ (m/s) gap d between two adjacent wind ring wind guiding blades 3 ₁ (mm), the horizontal projection length S of the wind ring wind guiding blade 3 ₂ (mm) the overlapping length S of the horizontal projection of the adjacent two wind ring wind guiding blades 3 ₁ (mm), the gap (from top to bottom) d between two adjacent scattering plates of the annular 'ladder' -shaped scattering device ₄ (mm)、d ₅ (mm)、d ₆ (mm), diameter of lower end (from top to bottom) D of scattering plate of annular step-shaped scattering device ₉ (mm)、D ₁₀ (mm)、D ₁₁ (mm)、D ₁₂ (mm), the projection overlapping distance (from top to bottom) S of two adjacent scattering plate buses of the annular 'ladder' -shaped scattering device ₃ (mm)、S ₄ (mm)、S ₅ (mm), the gap (from top to bottom) d between two adjacent scattering plates of the annular Z-shaped scattering device ₇ (mm)、d ₈ (mm)、d ₉ (mm), diameter of lower end (from top to bottom) D of scattering plate of annular Z-shaped scattering device ₁₃ (mm)、D ₁₄ (mm)、D ₁₅ (mm)、D ₁₆ (mm), the projection point of the end of the upper scattered plate of the annular Z-shaped scattered device on the lower scattered plate is at a distance S from the end of the scattered plate ₇ (mm)、S ₈ (mm)、S ₉ (mm), the included angle theta between each scattering plate of the annular ladder-shaped scattering device and the annular Z-shaped scattering device and the horizontal direction ₇ (°)。

The main process parameter calculation steps are as follows:

1) System powder selecting air quantity Q (m) ³ /h)：

According to the design output P (t/h) of the system, the cyclic load k of the system and the powder concentration C _s (g/m ³ ) Feed concentration F _s (kg/m ³ ) Calculating the powder selecting air quantity Q (m) ³ /h)：

Wherein k=3±1, c _s ＝800±200g/m ³ ，F _s ＝2.5±0.5kg/m ³ 。

2) Coarse particle sorting rotating cage 5 diameter D ₁ (mm)：

Wherein D/H is the diameter-to-height ratio of a coarse particle sorting rotating cage, D/H=1.8-2.0, V ₂ Radial wind speed of rotating cage for coarse particle separation, V ₂ ＝1.5～2.5(m/s)。

3) Coarse particle sorting rotating cage 5 height H ₁ (mm)：

4) Outer diameter D of cloth tray bottom plate 24 ₂ (mm)：

D ₂ ＝D ₁ -(0～50) (4)

5) Diameter D of inner ring 4 of wind ring ₆ (mm)：

D ₆ ＝D ₂ -(40～60) (5)

6) The diameter of the outer ring 2 of the wind ring or the inner diameter D of the air inlet shell 27 ₇ (mm):

Wherein, the outlet wind speed V of the annular wind ring 25 ₃ ＝10±2m/s。

7) Diameter D of interface of guide cone 36-coarse material guide cone 38 ₈ (mm)：

Wherein, the air inlet 1 increases the wind speed V ₅ ＝4±1m/s。

8) Diameter D at upper end of inner cavity of coarse particle sorting shell 7 ₅ (mm)：

D ₅ ＝D ₁ +(400±100)mm (8)

9) Diameter D of feed pipe 8 ₄ (mm)：

Wherein, the cyclic load k=3+ -1 of the system, the material volume weight ρ _s ＝1.5～1.8(t/m ³ ) Flow velocity V of material _s Material filling rate epsilon=0.5 to 0.8, =1±0.5 (m/s).

10 Diameter D of air pipe 9 at outlet of coarse particle sorting rotating cage ₃ (mm)：

Wherein, the outlet wind speed V of the coarse particle sorting rotating cage ₁ ＝10～15(m/s)。

11 A gap H between the lower ring plate 22 and the bottom plate 24 of the distributing plate ₂ (mm)：

H ₂ ＝300±50(mm) (11)

12 A gap H between the bottom plate 24 of the cloth tray and the outlet of the annular air ring 25 ₃ (mm):

H ₃ ＝100±50(mm) (12)

13 3 number n (number) of wind-guiding blades of the wind ring:

wherein, the gap d between the adjacent two wind ring wind guiding blades 3 ₁ The clearance wind speed V of the wind ring wind guide blade is 150+/-50 (mm) ₄ =18±2 (m/s), n is rounded to the integer.

14 Annular wind ring 25 height H ₄ (mm)：

Wherein, the included angle theta between the wind ring wind guiding blade 3 and the horizontal direction ₂ =40±5 (°), overlapping length S of horizontal projection of adjacent two wind ring wind guiding blades 3 ₁ Horizontal projection length S of single wind ring wind guiding blade 3 ₂ Ratio S of (2) ₁ /S ₂ The thickness t of the wind ring wind guiding blade 3 is=10-20 mm.

15 Height H of the material lifting table 34 ₅ (mm)：

H ₅ ＝(1.2±0.1)(H ₂ +H ₃ ) (15)

16 Angle theta between inner ring 4 of wind ring and horizontal direction ₁ (°)：

θ ₁ ＝60±10 (16)

17 Angle theta between the diversion cone 36 and the horizontal direction ₃ (°)：

θ ₃ ＝60±10 (17)

Among them, θ is preferable ₃ ＝θ ₁ ；

18 Angle θ between the material lifting table 34 and the horizontal direction ₄ (°)：

θ ₄ ＝50±5 (18)

19 Angle theta between the coarse material guide cone 38 and horizontal direction ₅ (°)：

θ ₅ ＝60±5 (19)

20 Angle theta between coarse particle sorting shell 7 and horizontal direction ₆ (°)：

θ ₆ ＝70±5 (20)

21 Diameter of the lower end of the scattering plate of the annular step-shaped scattering device 51, D from top to bottom respectively ₉ (mm)、D ₁₀ (mm)、D ₁₁ (mm)、D ₁₂ (mm)：

D ₁₂ ＝D ₈ +(500～600) (22)

22 Annular stepThe gaps between two adjacent scattering plates of the' shape scattering device are d respectively from top to bottom ₄ (mm)、d ₅ (mm)、d ₆ (mm)：

Wherein, the annular step-shaped scattering device blows the wind velocity V ₆ ＝14±2(m/s)；

23 Diameter of the lower end of the scattering plate of the annular Z-shaped scattering device 72, D from top to bottom respectively ₁₃ (mm)、D ₁₄ (mm)、D ₁₅ (mm)、D ₁₆ (mm)：

24 Gap between two adjacent scattering plates of the annular Z-shaped scattering device is d from top to bottom respectively ₇ (mm)、d ₈ (mm)、d ₉ (mm)：

Wherein, the annular Z-shaped scattering device blows the wind velocity V ₇ ＝14±2(m/s)；

25 The projection overlapping distance of the bus of two adjacent scattering plates of the annular ladder-shaped scattering device is S from top to bottom ₃ (mm)、S ₄ (mm)、S ₅ (mm)：

S ₃ ＝S ₄ ＝S ₅ ＝150±50 (31)

If S ₃ 、S ₄ 、S ₅ If the requirement of the formula (31) cannot be satisfied, D can be properly adjusted ₉ 、D ₁₀ 、D ₁₁ Calculating a value;

26 The projection point of the tail end of the upper scattered plate of the annular Z-shaped scattering device on the lower scattered plate is at a distance from the tail end of the scattering plate, and the S is respectively from top to bottom ₇ (mm)、S ₈ (mm)、S ₉ (mm)：

S ₇ ＝S ₈ ＝S ₉ ＝150±50 (32)

If S ₇ 、S ₈ 、S ₉ Can not meet the requirement (32), and can properly adjust D ₁₄ 、D ₁₅ 、D ₁₆ Calculating a value;

27 Annular step-shaped scattering device and annular Z-shaped scattering device, and included angle theta between each scattering plate and horizontal direction ₇ (°)：

θ ₇ ＝45±5 (33)。

In order to verify the technical effect of the invention, the invention is based on a TRP phi 400x100 mm-phi 750x2500mm semi-industrial combined grinding test system, and the coarse and fine sorting mechanism of the invention is matched with the traditional dynamic powder concentrator, and designs the powder-sorting air quantity of the system to be 4000m ³ And (3) carrying out comparative test research on 40 groups of grinding PO425 cement on the original V-shaped powder concentrator of the system under the condition of basically the same working condition, wherein the specification Cphi is 300 x 550-Fphi is 300-570mm, and the test statistical data result is shown in table 1.

TABLE 1 comparison of the powder concentrator of the invention with conventional V-concentrator

According to the data shown in Table 1, compared with the traditional V selection technology, the powder selection efficiency of the invention is greatly reduced under the condition of basically the same working condition, the powder selection efficiency of the particles with the particle size of more than 0.2mm is reduced by 35.4 percent, and the powder selection efficiency of the fine particles with the particle size of less than or equal to 0.2mm is improved by 20.9 percent. The powder selecting efficiency of coarse particles is reduced, more coarse particles return to the powder grinding equipment, the powder selecting efficiency of small particles smaller than or equal to 0.2mm is increased, more finished particles leave the powder grinding equipment, and the powder is not returned to the powder grinding equipment for grinding again, so that the stability of a material layer is damaged, and the grinding efficiency is reduced. Therefore, the powder selecting definition of the invention is greatly improved, the common problem of unclear selection of coarse, fine, middle and coarse in the traditional V selection is solved, and the expected purpose is achieved.

According to the test statistical data in Table 1, in the aspect of system performance synergy, the system time of the invention is increased from 1.51t/h to 1.78t/h, the amplification is 17.8%, and the specific surface area of the finished product is 3183cm ² Increase/g to 3472cm ² And/g, the amplification is 7.6%, and the quality of the finished product is obviously improved. In the aspect of the output of the main machine, the grain diameter is used>The powder selecting efficiency of 0.2mm particles is greatly reduced, the powder selecting efficiency of small particles less than or equal to 0.2mm is increased, the fine powder in the materials of the heavy-duty roller press is greatly reduced, the stability of the material layer is improved, the absorption power of the roller press is increased from 17.9kW to 21.4kW, the increase is 19.6%, the output of a main machine is obviously increased, and important guarantee is provided for improving the production and reducing the consumption. In the aspect of power consumption of a host, the nominal power consumption is reduced to be 3200cm at the same degree although the reduction of the nominal power consumption is not obvious ² The equivalent weight per gram of the specific surface area can be reduced to 18.3kWh/t from 21.1kWh/t, and the amplitude is reduced by 13.2%.

In conclusion, compared with the traditional V-selection technology, the invention has obvious effects of improving yield and reducing consumption.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. The utility model provides a thick thin sorting mechanism of classifying separator which characterized in that: the coarse and fine sorting mechanism comprises an air distribution area and a pre-scattering and coarse particle grading area which are connected from bottom to top;

the pre-scattering and coarse particle classifying area comprises a coarse particle classifying shell, a coarse particle classifying rotating cage, a distributing device and a coarse particle classifying drive, wherein the coarse particle classifying rotating cage is positioned in the coarse particle classifying shell and comprises coarse particle classifying blades positioned around, a cage frustum coaxially arranged in the coarse particle classifying blades and scattering round steel positioned at the upper part of the inner side of the cage frustum, an upper annular plate is arranged at the top of the coarse particle classifying rotating cage, a middle annular plate is arranged at the middle part of the coarse particle classifying rotating cage, a lower annular plate is arranged at the bottom of the coarse particle classifying rotating cage, and coarse particle classifying blades are positioned between the upper annular plate, the middle annular plate and the lower annular plate, close to the outer edges of the upper annular plate, the middle annular plate and the lower annular plate and uniformly distributed radially; the upper parts of the coarse particle sorting shell and the coarse particle sorting blades are provided with supporting cover plates, the supporting cover plates are fixedly connected with the coarse particle sorting shell, and the supporting cover plates are connected with an upper annular plate of the coarse particle sorting rotating cage in a dynamic sealing mode to form rotating cage external sealing of the coarse particle sorting rotating cage; the supporting cover plate, the coarse particle sorting shell and the coarse particle sorting blades form a coarse particle sorting area together;

2. The coarse and fine sorting mechanism of the classifying powder concentrator according to claim 1, wherein the bottom surface of the supporting cover plate is fixedly connected with an outer sealing outer ring positioned at the outer side of the upper ring plate and an outer sealing inner ring positioned at the inner side of the upper ring plate, the outer sealing outer ring and the outer sealing inner ring are matched with the upper ring plate to form a rotating cage outer seal, the rotating cage outer seal is a dynamic seal, and the dynamic seal clearance of the rotating cage outer seal is 10-20 mm;

3. The coarse and fine sorting mechanism of the classifying powder concentrator according to claim 1, wherein the coarse particle sorting rotating cage and the distributing device are driven together by the same driving device, the shafting comprises a main shaft and a main shaft sleeve sleeved on the main shaft, a hub is arranged at the top of the main shaft, the upper part of the hub is connected with the scattering round steel, the lower part of the hub is connected with the distributing device, and an anti-wear cap is arranged at the top of the hub.

4. The coarse and fine separation mechanism of the classifying powder separator according to claim 1, wherein the coarse particle separation rotating cage and the material distributing device are independently driven by two drives respectively, the coarse particle separation driving comprises an independent driving one and an independent driving two, the shafting one comprises an inner transmission shaft and an outer transmission sleeve shaft, the upper end of the inner transmission shaft is connected with the scattering round steel through a hub, and the lower end of the inner transmission shaft is connected with the independent driving one; the outer transmission sleeve is sleeved on the inner transmission shaft, the upper end of the outer transmission sleeve is connected with the material distribution device, and the lower end of the outer transmission sleeve is connected with the independent driving device II through the belt pulley group.

5. The thickness sorting mechanism of the classifying powder concentrator according to claim 1, wherein the distributing device is composed of a distributing disc frustum and a distributing disc bottom plate, the distributing disc frustum is positioned below the cage frustum, the outer edge of the bottom end of the distributing disc frustum is connected with the distributing disc bottom plate, and a material flow distributing channel is formed between the distributing disc bottom plate and the lower annular plate; the cloth tray bottom plate is far from the gap H of the lower annular plate ₂ 250-350 mm, the bottom plate of the cloth tray is away from the outlet gap H of the annular air ring ₃ The outer diameter D of the bottom plate of the distributing plate is 50-150 mm ₂ Diameter D of coarse particle sorting rotating cage ₁ The size is 0-50 mm smaller; height H of the material lifting table ₅ The included angle theta between the material lifting table and the horizontal direction is 1.1 to 1.3 times of the gap between the lower annular plate and the annular air ring outlet ₄ 45-55 degrees; when the coarse particle sorting rotating cage and the material distributing device are driven together by the same drive, distributing round steel is uniformly distributed on one circle of the material flow distributing channel, the top end of the distributing round steel is connected with the lower annular plate, and the bottom end of the distributing round steel is connected with the bottom plate of the distributing plate;

6. The coarse and fine separation mechanism of the classification powder separator according to claim 1, wherein the feeding pipe is positioned right above the center of the coarse particle separation rotating cage, the feeding pipe is communicated with the inside of the cage frustum, and a dust-containing airflow ascending channel is formed between the feeding pipe and an outlet air pipe of the coarse particle separation rotating cage;

the diameter D of the feeding pipe ₄ (mm)：

diameter D of coarse particle sorting rotating cage ₁ (mm)：

Wherein, the cyclic load k=3+ -1 of the system, and the powder concentration C is selected _s ＝800±200(g/m ³ ) Feed concentration F _s ＝2.5±0.5(kg/m ³ )；

7. The coarse and fine separation mechanism of the classification powder separator according to claim 1, wherein the upper ring plate is connected with the cage frustum through a rotating cage pull rod, and the arrangement direction of the rotating cage pull rod is consistent with the rotation direction of the coarse particle separation rotating cage and is uniformly distributed along the axis of the coarse particle separation rotating cage; the inner edge of the lower annular plate is connected with the cage frustum; the inner edge of the middle ring plate is connected with the cage frustum through a pull rod or a rib plate.

8. The coarse and fine separation mechanism of a classifying separator according to claim 1, wherein the air inlet is connected to a classifying device or a pulverizing device, and the dust-containing air flow to be separated is introduced into the air inlet housing in a wind-sweeping manner.

9. The coarse and fine sorting mechanism of the classifying powder concentrator according to claim 1, wherein an annular step-shaped scattering device or an annular Z-shaped scattering device is arranged below the annular air ring and in the inner cavity of the air inlet shell;

10. The coarse and fine separation mechanism of the classifying separator according to claim 1, wherein the annular wind ring comprises a wind ring inner ring, a wind ring outer ring, and a plurality of wind ring wind guide vanes obliquely arranged between the wind ring inner ring and the wind ring outer ring; the diameter D of the top of the inner ring of the wind ring ₆ Outer diameter D of bottom plate of cloth tray ₂ The angle theta between the inner ring of the wind ring and the horizontal direction is 40-60 mm smaller ₁ 50-70 degrees;

The number n (number) of wind-guiding blades of the wind ring:

wherein n is rounded to an integer;

annular wind ring height H ₄ (mm)：

Wherein θ ₂ S is the included angle (DEG) between the wind ring wind guide blade and the horizontal direction ₁ /S ₂ The ratio of the horizontal projection overlapping length of two adjacent wind ring wind guiding blades to the horizontal projection length of a single wind ring wind guiding blade is given, and t is the thickness (mm) of the wind ring wind guiding blade;

11. The classifying separator according to claim 1The coarse and fine sorting mechanism is characterized in that the bottom end of the guide cone is connected with a coarse material guide cone, and the guide cone forms an included angle theta with the horizontal direction ₃ 50-70 DEG, and the included angle theta between the coarse material guide cone and the horizontal direction ₅ 55-65 degrees;

Wherein V is ₅ The wind speed is raised for the air inlet, and the wind speed V is raised for the air inlet ₅ 3 to 5 (m/s).

12. Use of a coarse and fine sorting mechanism according to any of claims 1-11, characterized in that the coarse and fine sorting mechanism is applicable in a classifying classifier.