CN218962875U - High-efficient powder selecting device of coal vertical mill - Google Patents
High-efficient powder selecting device of coal vertical mill Download PDFInfo
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- CN218962875U CN218962875U CN202222541726.9U CN202222541726U CN218962875U CN 218962875 U CN218962875 U CN 218962875U CN 202222541726 U CN202222541726 U CN 202222541726U CN 218962875 U CN218962875 U CN 218962875U
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model relates to the technical field of coal vertical mill coal powder preparation, in particular to a high-efficiency coal vertical mill powder selecting device, which comprises a rotor body, a main shaft of a powder selecting machine, a wind guide blade group, a powder selecting shell, a powder return cone, a sealing ring, a wind ring and a material blocking ring; according to the utility model, the stator blades of the wind-guiding blade group are circumferentially arranged at a specific angle according to the fluid characteristics, the rotor blades of the rotor body are circumferentially arranged at a specific angle according to the fluid characteristics, a narrow and long grading separation functional area is formed between the wind-guiding blade group and the rotor body, and the coal dust entering the grading separation functional area is fully dispersed under the action of rotational flow and centrifugal force of the rotor body by utilizing the special structural design of the rotor body and the wind-guiding blade group, so that excellent grading precision is obtained, qualified coal dust finished products are separated, high-efficiency powder selecting efficiency is obtained, and further the internal circulation of a coal vertical mill system is effectively reduced, thereby reducing the unit yield energy consumption of the coal vertical mill.
Description
Technical Field
The utility model relates to the technical field of coal powder preparation by a coal vertical mill, in particular to a high-efficiency powder selecting device of the coal vertical mill.
Background
The coal vertical mill can be widely applied to industries such as cement, electric power, steel, metallurgy and the like. Because of the special process and structure, the coal vertical mill has less dust, low noise and high efficiency grading and excellent combustion performance of produced coal powder, and the rotor blade of the rotor body of the existing coal vertical mill is designed to form a 90-degree included angle with the radius of the rotor body.
Disclosure of Invention
The utility model aims to provide a high-efficiency powder selecting device of a coal vertical mill, which aims to solve the technical problems.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a high-efficient powder selecting device of coal vertical mill, includes rotor body, selection powder machine main shaft, wind-guiding blade group, selection powder casing, powder cone, sealing ring, wind ring, fender material ring, its characterized in that: the powder selecting machine comprises a powder selecting shell, wherein the top center of the powder selecting shell is provided with a powder selecting machine main shaft, the bottom end of the powder selecting machine main shaft is provided with a rotor body, the powder selecting machine main shaft is positioned with the rotor body through a processing installation spigot and is connected with the rotor body through a reaming bolt, the inner wall of the top of the powder selecting shell is provided with a wind guiding blade group, the wind guiding blade group is positioned outside the rotor body, a narrow and long grading separation functional area is formed between the wind guiding blade group and the rotor body, a powder return cone is arranged below the wind guiding blade group and is fixedly connected with a support of the powder selecting shell, and the wind guiding blade group and the powder return cone are sealed through a sealing ring;
the air ring is welded on the coal vertical mill shell, the air port surface of the air ring is flush with the upper end surface of the millstone, a small gap is reserved between the inner diameter of the air ring and the outer diameter of the millstone, and the material blocking ring is fixedly arranged at the upper end of the outer edge of the millstone through bolt connection and is in multi-layer arrangement.
Preferably, the rotor body includes upper portion flange, moving blade, middle part flange and tubaeform bottom flange, tubaeform bottom flange's top and middle part flange welding, the moving blade is specific angle circumference according to fluid characteristic and arranges, welds into wholly with upper portion flange, middle part flange and tubaeform bottom flange, middle part flange central point puts the processing and has the installation tang, the installation tang is for installation powder concentrator main shaft location alignment use, the rotor body carries out dynamic balance experiment.
Preferably, the wind guiding blade group comprises stationary blades, a top flange, an outer ring flange and an inverted cone-shaped bottom flange, wherein the stationary blades are circumferentially arranged at a specific angle according to the fluid characteristic, and are welded with the top flange, the outer ring flange and the inverted cone-shaped bottom flange to form a whole.
Preferably, the wind guide blade group is arranged outside the rotor body, a narrow and long grading separation functional area is formed between the wind guide blade group and the rotor body, the coal dust entering the grading separation functional area is fully dispersed under the action of rotational flow and centrifugal force of the rotor body by utilizing the special structural design of the rotor body and the wind guide blade group, excellent grading precision is obtained by adjusting the rotational speed of the rotor body, qualified coal dust finished products are selected, and unit yield energy consumption of the coal vertical mill is reduced.
Preferably, the powder return cone is fixedly connected with the support of the powder selecting shell through bolts, and the coaxiality deviation of the powder return cone and the wind guide blade group after installation is ensured, and the blanking height of the blanking opening at the lower part of the powder return cone from the millstone after installation is ensured.
Preferably, the air guide blade group is sealed with the powder return cone through a sealing ring, and the sealing ring is inlaid in the powder return cone mounting groove.
Preferably, the wind ring comprises a guide cone and a wind guide ring, the guide cone is welded on the coal vertical mill shell, the wind guide ring is provided with a certain jet angle, the internal wind guide blades are distributed in the circumferential direction according to a specific inclination angle, the wind guide ring is connected on the guide cone through bolts and is flush with the upper end surface of the grinding disc, and a tiny gap is reserved between the inner diameter and the outer diameter of the grinding disc.
Preferably, the material blocking ring is of a sectional arc flange structure, is fixedly arranged at the upper end of the outer edge of the grinding disc through bolt connection, is arranged in multiple layers, adjusts the material layers on the grinding disc of the coal vertical mill, and plays a role in stabilizing the material layers and reducing vibration of the mill.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model utilizes the special structural design of the rotor body and the wind-guiding blade group to ensure that coal powder entering the grading separation functional area is fully dispersed under the action of rotational flow and the centrifugal force of the rotor body, excellent grading precision is obtained by adjusting the rotational speed of the rotor body, qualified coal powder finished products are sorted, a powder return cone is arranged below the wind-guiding blade group, the powder return cone is fixedly connected with a support of a powder selecting shell through bolts, the coaxiality deviation of the mounted powder return cone and the wind-guiding blade group is ensured, the blanking height of a material opening at the lower part of the mounted powder return cone from a grinding disc is ensured, the wind-guiding blade group and the powder return cone are sealed through a sealing ring, the sealing ring is inlaid in a powder return cone mounting groove, the wind-guiding ring comprises a wind-guiding cone and a wind-guiding ring, the wind-guiding cone is welded on a coal vertical mill shell, the wind-guiding ring has a certain jet angle, a specific inclination angle is circumferentially arranged inside the wind-guiding blade, the wind-guiding ring is flush with the upper end face of the grinding disc through bolts, the inner diameter of the wind-guiding ring is in a small clearance with the outer diameter of the grinding disc, the wind-guiding ring is in a sectional arc-shaped flange structure, the wind-guiding ring is fixedly connected with the upper end of the grinding disc through bolts, the upper edge is ensured, the ground is arranged at the upper end of the grinding disc, and the coal layer is arranged in a multilayer grinding disc is stable, and has a function of reducing effect, and coal layer is stable.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic view of the rotor body structure of the present utility model;
FIG. 3 is a schematic view of a wind guiding vane assembly according to the present utility model;
FIG. 4 is a schematic view of the wind ring structure of the present utility model.
In the figure: 1. a rotor body; 2. a main shaft of the powder selecting machine; 3. wind guiding blade group; 4. selecting a powder shell; 5. a powder return cone; 6. a seal ring; 7. a wind ring; 8. a material blocking ring; 9. grinding disc; 11. an upper flange; 12. a rotor blade; 13. a middle flange; 14. a bottom flange; 15. installing a spigot; 31. stationary blades; 32. an outer ring flange; 33. a top flange; 34. a bottom flange; 71. a diversion cone; 72. and an air guide ring.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which are obtained by a worker of ordinary skill in the art without creative efforts, are within the protection scope of the present utility model based on the embodiments of the present utility model.
Referring to fig. 1 to 4, the present utility model provides the following technical solutions: the utility model provides a high-efficient powder selecting device of coal vertical mill, includes rotor body 1, selection powder machine main shaft 2, wind-guiding impeller group 3, selection powder casing 4, powder cone 5, sealing ring 6, wind ring 7, keeps off material ring 8, its characterized in that: the powder selecting device comprises a powder selecting shell 4, wherein a powder selecting main shaft 2 is arranged in the center of the top of the powder selecting shell 4, a rotor body 1 is arranged at the bottom end of the powder selecting main shaft 2, the powder selecting main shaft 2 and the rotor body 1 are positioned through a processing installation spigot 15 and connected through reaming bolts, a wind guiding blade group 3 is arranged on the inner wall of the top of the powder selecting shell 4, the wind guiding blade group 3 is positioned outside the rotor body 1, a narrow and long grading separation functional area is formed between the wind guiding blade group 3 and the rotor body 1, coal dust entering the grading separation functional area is fully dispersed under the centrifugal force of the cyclone and the rotor body 1 by utilizing the special structural design of the rotor body 1 and the wind guiding blade group 3, an excellent grading precision is obtained through the adjustment of the rotating speed of the rotor body 1, qualified coal dust finished products are selected, a powder returning cone 5 is fixedly connected with a support of the powder selecting shell 4, and the wind guiding blade group 3 and the powder returning cone 5 are sealed by a sealing ring 6.
The wind ring 7 is welded on the coal vertical mill shell, the wind gap surface of the wind ring 7 is flush with the upper end surface of the grinding disc 9, a tiny gap is reserved between the inner diameter of the wind ring 7 and the outer diameter of the grinding disc 9, and the material blocking ring 8 is fixedly arranged at the upper end of the outer edge of the grinding disc 9 in a multi-layer mode through bolt connection.
Further, the rotor body 1 comprises an upper flange 11, moving blades 12, a middle flange 13 and a horn-shaped bottom flange 14, wherein the top end of the horn-shaped bottom flange 14 is welded with the middle flange 13, the moving blades 12 are circumferentially arranged at a specific angle according to the fluid characteristics, the moving blades are welded with the upper flange 11, the middle flange 13 and the horn-shaped bottom flange 14 into a whole, a mounting spigot 15 is machined at the central position of the middle flange 13, the mounting spigot 15 is used for positioning and aligning the main shaft 2 of the powder concentrator, and the rotor body 1 performs a dynamic balance experiment.
Further, the wind guiding blade group 3 includes the stator blades 31, the top flange 33, the outer ring flange 32 and the back taper bottom flange 34, the stator blades 31 are circumferentially arranged at a specific angle according to the fluid characteristics, and are welded with the top flange 33, the outer ring flange 32 and the back taper bottom flange 34 to be integrated.
Further, the wind guide blade group 3 is arranged outside the rotor body 1, a narrow and long grading separation functional area is formed between the wind guide blade group and the rotor body 1, coal dust entering the grading separation functional area is fully dispersed under the action of rotational flow and centrifugal force of the rotor body 1 by utilizing the special structural design of the rotor body 1 and the wind guide blade group 3, excellent grading precision is obtained by adjusting the rotational speed of the rotor body 1, qualified coal dust finished products are sorted out, high powder selecting efficiency is obtained, and further the internal circulation of a coal vertical mill system is effectively reduced, so that the unit yield energy consumption of the coal vertical mill is reduced.
Further, the powder return cone 5 is fixedly connected with the support of the powder selecting shell 4 through bolts, coaxiality deviation of the powder return cone 5 and the wind guide blade group 3 after installation is guaranteed, and blanking height of a blanking hole on the lower part of the powder return cone 5 from the millstone 9 after installation is guaranteed.
The air guide blade group 3 and the powder return cone 5 are sealed through the sealing ring 6, the sealing ring 6 is inlaid in the powder return cone 5 mounting groove, the air ring 7 comprises a guide cone 71 and an air guide ring 72, the guide cone 71 is welded on a coal vertical mill shell, the air guide ring 72 has a certain jet angle, the inner air guide blades are distributed in the circumferential direction according to a specific inclination angle, the air guide ring 72 is connected on the guide cone 71 through bolts and is flush with the upper end surface of the mill disk 9, a small gap is reserved between the inner diameter and the outer diameter of the mill disk 9, the material blocking ring 8 is of a sectional arc flange structure, is fixedly arranged at the upper end of the outer edge of the mill disk 9 through bolts and is in multi-layer arrangement, and the material layer on the mill disk 9 of the coal vertical mill is regulated to play a role in stabilizing the material layer and reducing mill vibration.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a high-efficient powder device of selecting of coal vertical mill, includes rotor body (1), selection powder machine main shaft (2), wind-guiding blade group (3), selects powder casing (4), powder cone (5), sealing ring (6), wind ring (7), keeps off material ring (8), its characterized in that: the powder selecting machine comprises a powder selecting shell (4), wherein a powder selecting main shaft (2) is arranged in the center of the top of the powder selecting shell (4), a rotor body (1) is arranged at the bottom end of the powder selecting main shaft (2), the powder selecting main shaft (2) and the rotor body (1) are positioned through a machining installation spigot (15) and are connected through a reaming bolt, an air guide blade group (3) is arranged on the inner wall of the top of the powder selecting shell (4), the air guide blade group (3) is positioned outside the rotor body (1), a narrow and long grading separation functional area is formed between the air guide blade group (3) and the rotor body (1), a powder return cone (5) is arranged below the air guide blade group (3), the powder return cone (5) is fixedly connected with a support of the powder selecting shell (4), and the air guide blade group (3) and the powder return cone (5) are sealed through a sealing ring (6);
the air ring (7) is welded on the coal vertical mill shell, the air port surface of the air ring (7) is flush with the upper end surface of the grinding disc (9), a tiny gap is reserved between the inner diameter of the air ring (7) and the outer diameter of the grinding disc (9), and the material blocking ring (8) is fixedly arranged at the upper end of the outer edge of the grinding disc (9) in a multi-layer mode through bolt connection.
2. The efficient coal vertical mill powder selecting device according to claim 1, wherein: rotor body (1) include upper portion flange (11), moving blade (12), middle part flange (13) and tubaeform bottom flange (14), the top and the middle part flange (13) welding of tubaeform bottom flange (14), moving blade (12) are the circumference and arrange, weld into whole with upper portion flange (11), middle part flange (13) and tubaeform bottom flange (14), middle part flange (13) central point puts processing has installation tang (15).
3. The efficient coal vertical mill powder selecting device according to claim 1, wherein: the wind guide blade group (3) comprises stationary blades (31), a top flange (33), an outer ring flange (32) and an inverted cone-shaped bottom flange (34), wherein the stationary blades (31) are circumferentially distributed according to fluid characteristics and are welded with the top flange (33), the outer ring flange (32) and the inverted cone-shaped bottom flange (34) to form a whole.
4. The efficient coal vertical mill powder selecting device according to claim 1, wherein: the powder return cone (5) is fixedly connected with the support of the powder selecting shell (4) through bolts.
5. The efficient coal vertical mill powder selecting device according to claim 1, wherein: the air guide blade group (3) is sealed with the powder return cone (5) through a sealing ring (6), and the sealing ring (6) is inlaid in the powder return cone (5) mounting groove.
6. The efficient coal vertical mill powder selecting device according to claim 3, wherein: the wind ring (7) comprises a guide cone (71) and a wind guide ring (72), wherein the guide cone (71) is welded on the powder selecting shell (4), the wind guide ring (72) is provided with jet angles, the stator blades (31) are circumferentially distributed and are connected on the guide cone (71) through bolts, the guide cone is flush with the upper end face of the grinding disc (9), and a tiny gap is reserved between the inner diameter and the outer diameter of the grinding disc (9).
7. The efficient coal vertical mill powder selecting device according to claim 1, wherein: the material blocking ring (8) is of a sectional arc flange structure and is fixedly arranged at the upper end of the outer edge of the grinding disc (9) in a multi-layer mode through bolt connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222541726.9U CN218962875U (en) | 2022-09-26 | 2022-09-26 | High-efficient powder selecting device of coal vertical mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222541726.9U CN218962875U (en) | 2022-09-26 | 2022-09-26 | High-efficient powder selecting device of coal vertical mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218962875U true CN218962875U (en) | 2023-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222541726.9U Active CN218962875U (en) | 2022-09-26 | 2022-09-26 | High-efficient powder selecting device of coal vertical mill |
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| Country | Link |
|---|---|
| CN (1) | CN218962875U (en) |
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- 2022-09-26 CN CN202222541726.9U patent/CN218962875U/en active Active
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