CN112138848A - Axial separator of coal mill - Google Patents
Axial separator of coal mill Download PDFInfo
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- CN112138848A CN112138848A CN202010977836.2A CN202010977836A CN112138848A CN 112138848 A CN112138848 A CN 112138848A CN 202010977836 A CN202010977836 A CN 202010977836A CN 112138848 A CN112138848 A CN 112138848A
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- axial separator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/20—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
- B02C23/22—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating with recirculation of material to crushing or disintegrating zone
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- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention discloses an axial separator of a coal mill, which comprises: an outer housing; the feeding pipe is fixedly arranged at the bottom end of the outer shell and is communicated with the outer shell; the impact cone is fixedly arranged in the outer shell, the impact cone is provided with a pointed cone part facing the feeding pipe, the outer diameter of the pointed cone part is gradually expanded along the feeding direction of the feeding pipe, and an annular separation channel is formed between the impact cone and the outer shell; and the adjusting baffles are arranged in the annular separation channel and are uniformly arranged along the circumferential direction of the impact cone. The invention can effectively optimize the flow field between the feeding pipe and the impact cone, thereby optimizing the separation effect of the axial separator.
Description
Technical Field
The invention relates to the technical field of coal mill separators, in particular to an axial separator of a coal mill.
Background
The coal mill axial separator is used for sorting coal powder ground by the coal mill according to the granularity, namely, fine powder (qualified coal powder) with the granularity smaller than a certain granularity level is directly sent into a hearth to be combusted along with a medium as a product. Coarse particles (unqualified coal powder) with the particle size larger than the particle size are separated from the airflow and returned to the coal mill for grinding again. The axial separator with ideal performance can bring out most qualified fine coal powder along with airflow, most of the coal powder returned to the coal mill for re-grinding is unqualified coarse particles, the circulation rate is low, the output of the coal mill is good, the ventilation power consumption and the coal grinding power consumption of the coal mill are low, and electricity and energy are saved.
However, due to structural limitations of the conventional axial coal mill separator, a considerable part of qualified coal powder in the returned powder separated by the axial separator is not effectively separated and then is carried out, but is returned to the interior of the coal mill for continuous grinding.
Disclosure of Invention
The invention mainly aims to provide an axial separator of a coal mill, and aims to solve the technical problem that the axial separator in the prior art is poor in separation effect.
In order to achieve the above object, the present invention provides an axial separator for a coal mill, comprising:
an outer housing;
the feeding pipe is fixedly arranged at the bottom end of the outer shell and is communicated with the outer shell;
the impact cone is fixedly arranged in the outer shell, the impact cone is provided with a pointed cone part facing the feeding pipe, the outer diameter of the pointed cone part is gradually expanded along the feeding direction of the feeding pipe, and an annular separation channel is formed between the impact cone and the outer shell;
and the adjusting baffles are arranged in the annular separation channel and are uniformly arranged along the circumferential direction of the impact cone.
Optionally, the impact cone further comprises:
the lower part of the impact cone main body;
a connecting portion disposed between the striker cone body and the pointed cone portion;
wherein, follow the direction of feed of inlet pipe, striking awl main part lower part with the external diameter of connecting portion all expands gradually the setting, just the lateral wall of connecting portion with there is the contained angle between the lateral wall of striking awl main part lower part.
Optionally, the lower part of the impact cone main body, the connecting part and the pointed cone part are all coaxially arranged.
Optionally, the impact cone is arranged coaxially with the feed pipe.
Optionally, the impact cone further comprises:
an impact cone body upper portion including a sidewall and a top wall;
wherein the side wall is arranged in a tapered manner along the feeding direction of the feeding pipe; the top wall is fixedly connected with the outer shell.
Optionally, the method further includes:
the container shrinkage part is fixedly arranged in the outer shell, and the outer diameter of the container shrinkage part is gradually reduced along the feeding direction of the feeding pipe;
the upper part of the impact cone main body is positioned in the shrinkage part, and the upper part of the impact cone main body and the shrinkage part form an annular discharge channel.
Optionally, the upper end surface of the accommodating part is connected with the inner top wall of the outer shell; the lower end face of the containing part is connected with the side wall of the outer shell.
Optionally, the feed tube has a flared end;
the coal pulverizer axial separator further comprises:
the shrinkage cover is connected to the flared end, and the outer diameter of the shrinkage cover is gradually expanded along the feeding direction of the feeding pipe;
wherein at least part of the tapered part is positioned in the shrinkage cavity cover, and an annular feeding channel is formed between the tapered part and the shrinkage cavity cover.
Optionally, an included angle is formed between the extending direction of the side wall of the shrinkage cover and the extending direction of the side wall of the flared end.
Optionally, all of the pointed cone parts are positioned in the shrinkage cover.
According to the technical scheme, the plane of the bottom of the traditional impact cone is replaced by the pointed cone, and the outer diameter of the pointed cone is gradually enlarged along the feeding direction of the feeding pipe. In this application, the buggy that is sent to in the shell body from the inlet pipe strikes again on the gradually expanding face of sharp cone portion after being flowed by sharp cone subtotal, and this striking is oblique to hit, thereby the separation effect of the striking of inlet pipe exit has been weakened, with the flow field of this striking department has been optimized, prevent that the condition that the qualified buggy striking back of striking department is directly wrapped up in by unqualified buggy and falls back the coal pulverizer takes place, thereby the separation effect of qualified buggy in the buggy has been improved, and then the power of exerting oneself of coal pulverizer has been increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of an axial separator of a coal pulverizer of the present invention;
FIG. 2 is a schematic structural view of another embodiment of the axial separator of the coal pulverizer of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The axial separator is a key device of the coal mill and has the function of sorting the pulverized coal ground by the coal mill according to the granularity, namely, fine powder (qualified pulverized coal) with the granularity smaller than a certain granularity level is directly sent into a hearth to be combusted as a product along with a medium. Coarse particles (unqualified coal powder) with the particle size larger than the particle size are separated from the airflow and returned to the coal mill for grinding again. The axial separator with ideal performance can bring out most qualified fine coal powder along with airflow, and most of the fine coal powder returning to the coal mill for re-grinding is unqualified coarse particles.
The traditional axial separator improves the impact separation effect, so that the separation effect of the axial separation is improved by further dispersing the pulverized coal with different granularity under the impact action. However, the inventor of the present application has found that in the conventional axial separator, the bottom of the impact cone is a flat surface, which makes the pulverized coal fed into the outer casing from the feeding pipe directly impact on the flat surface in the front direction, and then the pulverized coal is dispersed, so that the subsequent separation is performed under the action of wind. However, the bottom of the impact cone is a plane, so that the pulverized coal completely impacts the plane to be dispersed, the flow field in the space between the feeding pipe and the impact cone is excessively disordered, a part of qualified pulverized coal is not effectively separated and is brought back to the coal mill by unqualified pulverized coal to be continuously milled, and the electric energy of the coal mill is greatly wasted. Because the maximum stock on the grinding disc is a fixed value, the part of the pulverized coal simultaneously extrudes the raw coal falling on a part of the coal falling pipe, and the output of the coal mill is reduced. Meanwhile, due to poor separation effect, the air-powder ratio of the axial separator is high, and the wind power of the fan is wasted.
To this end, the present application provides a coal mill axial separator that replaces the flat surface of the bottom of a conventional impact cone with a pointed cone, i.e., the outer diameter of the pointed cone is tapered in the feed direction of the feed pipe. In this application, the buggy that is sent to in the shell body from the inlet pipe strikes again on the gradually expanding face of sharp cone portion after being flowed by sharp cone subtotal, and this striking is oblique to hit, thereby the separation effect of the striking of inlet pipe exit has been weakened, with the flow field of this striking department has been optimized, prevent that the condition that the qualified buggy striking back of striking department is directly wrapped up in by unqualified buggy and falls back the coal pulverizer takes place, thereby the separation effect of qualified buggy in the buggy has been improved, and then the power of exerting oneself of coal pulverizer has been increased.
The inventive concept of the present application is further illustrated below with reference to some specific embodiments.
In the embodiment of the invention, the coal mill axial separator is arranged between the coal mill and the boiler and is used for separating qualified coal powder in the coal mill and sending the qualified coal powder to the boiler.
In this embodiment, the coal pulverizer axial separator includes:
an outer case 100;
the feeding pipe 200 is fixedly arranged at the bottom end of the outer shell 100 and communicated with the outer shell 100;
the impact cone 500 is fixedly arranged in the outer shell 100, the impact cone 500 is provided with a pointed cone part 504 facing the feeding pipe, the outer diameter of the pointed cone part 504 is gradually expanded along the feeding direction of the feeding pipe 200, and an annular separation channel is formed between the impact cone 500 and the outer shell 100;
a plurality of adjusting baffles 800, adjusting baffles 800 set up in annular separation channel, and a plurality of adjusting baffles 800 evenly set up along the circumferencial direction of striking awl 500.
Referring to fig. 1, in particular, a separation bin is formed in the outer casing 100, wherein the outer casing 100 has a powder outlet pipe 300 communicating with the separation bin at an upper axial end thereof, and a feed pipe 200 and a feed back pipe communicating with the separation bin at a lower axial end thereof, respectively. An impact cone 500 is fixedly installed in the outer shell 100, and the impact cone 500 occupies the separation bin of the outer shell 100 to leave an annular separation channel. And at least one layer of adjusting baffles 800 is further arranged between the outer shells 100 of the impact cone 500. The baffles of each layer of the adjusting baffle 800 are uniformly arranged along the circumferential direction of the impact cone 500.
Wherein, the bottom end of the impact cone 500 is a tapered part 504 facing the feeding pipe 200, and the outer diameter of the tapered part 504 is gradually enlarged along the feeding direction of the feeding pipe 200.
The outer diameter of the tapered portion 504 is tapered, i.e., the tapered portion may be a shell or solid piece without a bottom wall, with the side walls converging directly to the apex portion of the bottom of the tapered portion. It should be noted that the side wall of the pointed conical portion 504 may be a straight line, that is, the pointed conical portion 504 is conical, and may also be a convex or concave curve. The present embodiment does not limit this.
It will be readily appreciated that the impact surface of the impact cone 500 of the conventional axial splitter, which faces the feed tube 200, is planar. The bottom of the impact cone 500 of the embodiment is directly opposite to the feeding pipe 200 and is a pointed cone portion 504 with a gradually expanding outer diameter, so that the pulverized coal blown into the separation bin in the feeding pipe 200 is directly shunted by the pointed top portion of the pointed cone portion 504 and impacts on the side wall of the pointed cone portion 504 at the same time, because the pulverized coal impacts with the pointed cone portion 504 at this time are oblique impacts, compared with the existing front impact, the oblique impacts weaken the impact separation effect, and simultaneously the oblique impacts also enable most of the pulverized coal after the impacts to still move towards the downstream of the feeding direction of the feeding pipe 200, so that the flow field between the impact cone 500 and the feeding pipe 200 is optimized, and the flow field at the position is not excessively disturbed. So that the wind of the feeding pipe 200 can flow the dispersed pulverized coal into the annular separation channel between the impact cone 500 and the sidewall of the outer casing 100. In this passage, the heavier, off-spec coal dust falls down the inside wall of the outer casing 100 under gravity and then returns to the coal mill through a return duct. And qualified coal powder passes through the gap before the adjusting baffle 800 and continuously ascends, and then enters the boiler through the discharge pipe 300.
That is, in this embodiment, the tapered portion 504 prevents the pulverized coal from directly colliding with the front side of the feeding pipe 200 and disturbing the flow field at the outlet of the feeding pipe 200, so as to prevent the unqualified pulverized coal from driving the qualified pulverized coal to directly fall into the feed back pipe under the action of the disturbed flow field at the feeding pipe 200. The separation effect of the axial separator is improved, and the output of the coal mill is improved.
Referring to fig. 1 and 2, in one embodiment, the impact cone 500 further includes:
a cone body lower portion 502;
a connecting portion 503, the connecting portion 503 is disposed between the impact cone main body lower portion 502 and the pointed cone portion 504;
wherein, along the feeding direction of feed pipe 200, the external diameter of impact cone main part lower part 502 and connecting portion 503 all sets up gradually, and there is the contained angle between the lateral wall of connecting portion 503 and the lateral wall of impact cone main part lower part 502.
It will be readily appreciated that the lower portion 502 of the impact cone body is a cone having a bottom end surface, since in order to ensure the wind field of the annular separation passage between the impact cone 500 and the outer casing 100, the wind speed is prevented from decreasing without separating the pulverized coal, so that the outer diameter of the lower portion 502 of the impact cone body is larger than that of the tapered portion 504, and in order to prevent the tapered portion 504 from obstructing the discharge of the feed pipe 200, the diameter of the tapered portion 504 is relatively smaller, i.e. if the tapered portion 504 is directly arranged on the bottom end surface of the lower portion 502 of the impact cone body, there is a step which will cause a portion of the pulverized coal to come out of the feed pipe 200 and then to impact the step frontally.
Therefore, in this embodiment, the lower part 502 of the impact cone main body and the pointed cone part 504 are connected by a connecting part 503, and the side wall of the connecting part 503 is also a tapered surface, so as to cover the step between the pointed cone part 504 and the lower part 502 of the impact cone main body and the pointed cone part 504, so as to further reduce frontal impact, optimize the flow field between the feed pipe 200 and the lower part 502 of the impact cone main body, and facilitate improving the separation effect of pulverized coal and increasing the output of the coal pulverizer.
Referring to fig. 1 and 2, as an alternative to this embodiment, in order to optimize the flow field and avoid uneven distribution of the flow field in the outer casing 100, the lower portion 502 of the impact cone body, the connecting portion 503 and the tapered portion 504 are coaxially disposed.
Referring to fig. 1 and 2, further, an impact cone 500 is disposed coaxially with the feed tube 200. That is, the lower impinging cone body 502, the connecting portion 503 and the tapered portion 504 are all disposed coaxially with the feed pipe 200, so that the pulverized coal fed from the feed pipe 200 is divided by the tapered portion 504 more uniformly, and the flow field in the outer casing 100 is further optimized.
Referring to fig. 1 and 2, in one embodiment, the impact cone 500 further includes:
an impact cone body upper portion 501, the impact cone body upper portion 501 including a sidewall and a top wall;
wherein, along the feeding direction of the feeding pipe 200, the side wall is arranged in a tapered way; the top wall is fixedly connected to the outer housing 100.
Specifically, the impact cone 500 has a spindle shape. The external diameter of the upper part 501 of the impact cone main body is gradually reduced, so that the upper space of the separation bin in the outer shell 100 is gradually increased, the wind speed is reduced, the gravity separation effect of the pulverized coal is improved after the wind speed is reduced, and the pulverized coal is made to slide down along the conical surface of the upper part 501 of the impact cone main body after being separated.
As an option of this embodiment, the coal mill axial separator further comprises:
the volume-reducing part 700, the volume-reducing part 700 is fixedly arranged in the outer shell 100, and the outer diameter of the volume-reducing part 700 is arranged in a tapered manner along the feeding direction of the feeding pipe 200;
wherein, the upper part 501 of the main body of the impact cone is positioned in the volume-reducing part 700, and the upper part 501 of the main body of the impact cone and the volume-reducing part 700 form an annular discharging channel.
Specifically, the reduced volume portion 700 may be directly welded or bolted into the outer shell 100. The impact cone main body upper part 501 and the volume reducing part 700 form an annular discharging channel, namely, the volume reducing part 700 is installed in the outer shell 100 in the traditional shape, so that the gravity separation effect of the pulverized coal is prevented from being influenced by too fast reduction of the wind speed in the upper space of the separation bin caused by the gradual reduction of the impact cone main body upper part 501.
Referring to fig. 2, the reduction unit 700 may be a steel plate, and both ends of the steel plate are welded to the inner sidewall of the outer casing 100. For example, the upper end surface of the container 700 is connected to the inner top wall of the outer case 100; the lower end surface of the accommodating portion 700 is connected to the side wall of the outer case 100. Referring to fig. 1, alternatively, the cross section of the container 700 may be wedge-shaped, that is, the container 700 may also be a steel plate with a certain thickness, and a tapered hole is formed on a bottom end surface of the steel plate, at this time, the container 700 may be fixedly connected to the outer shell 100 through a bolt set.
Referring to fig. 1, in one embodiment, feed tube 200 has a flared end 201.
The coal mill axial separator further comprises a shrinkage cover 900, the shrinkage cover 900 is fixedly connected to the material expansion end 201, and the outer diameter of the shrinkage cover 900 is gradually enlarged along the feeding direction of the feeding pipe 200.
Wherein at least part of the tapered portion 504 is located in the shrinkage cavity cover 900, and an annular feeding channel is formed between the tapered portion 504 and the shrinkage cavity cover 900.
Specifically, the feed tube 200 generally has a flared, expanding end 201. The present embodiment further provides a shrinkage cap 900 on the end face of the expansion end 201. The containment vessel 900 is trumpet shaped. The lens holder 900 may be integrally formed with the feed tube 200, or may be welded to the feed tube 200.
At the same time, in order to reduce the frontal impact of the pointed cone portion 504 with the pulverized coal, at least a portion of the pointed cone portion 504 extends into the shrinkage casing 900.
As can be easily understood, the conventional feeding pipe 200 has a short spreading end, a large amount of pulverized coal is directly spread in the outer casing 100 from the feeding pipe 200, and the wind speed is rapidly reduced, so that a part of qualified pulverized coal directly falls back into the return pipe 400 and then returns to the coal mill for repeated grinding. Especially for a large axial separator, the inner diameter size of the axial separator is larger, and the wind speed is reduced more obviously. But in order to ensure the separation effect of the pulverized coal, the wind speed is also limited so as to avoid sending unqualified pulverized coal and qualified pulverized coal into the boiler when the wind speed is high.
In this embodiment, by the arrangement of the volume reducing cover 900, the pulverized coal continuously enters the volume reducing cover 900 after coming out from the expansion end, is diffused in the volume reducing part, and then enters the separation bin of the outer shell 100 from the volume reducing cover 900. Compared with the condition that the pulverized coal directly enters the separation bin, the shrinkage hood 900 and the expansion end jointly prolong the pulverized coal diffusion distance and reduce the pulverized coal diffusion space, the air speed at the outlet of the expansion end is guaranteed, the sudden drop of the air speed is avoided, and the situation that the fine qualified pulverized coal is incapable of ascending after the air speed is greatly reduced is further avoided.
The specific extension direction of the shrinkage hood 900 may be identical to the extension direction of the flared end. As an option of this embodiment, an angle is formed between the extending direction of the side wall of the shrinkage hood 900 and the extending direction of the side wall of the flared end. The included angle may be an acute angle or may be greater than 180 °. Referring to fig. 2, for example, the included angle may be an obtuse angle. For example, the containment cap 900 and the expansion end 201 may together form a concentric reducer. Wherein, the shrinkage cover 900 is a big head part with a concentric big end and a small head part with a concentric big end and a concentric small end.
As an alternative to this embodiment, referring to fig. 2, in order to further reduce the extended coal diffusion distance and the reduced diffusion space to weaken the gravity separation effect after the wind speed is reduced, all of the tapered portions 504 are located in the shrinkage casing 900.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A coal pulverizer axial separator, comprising:
an outer housing;
the feeding pipe is fixedly arranged at the bottom end of the outer shell and is communicated with the outer shell;
the impact cone is fixedly arranged in the outer shell, the impact cone is provided with a pointed cone part facing the feeding pipe, the outer diameter of the pointed cone part is gradually expanded along the feeding direction of the feeding pipe, and an annular separation channel is formed between the impact cone and the outer shell;
and the adjusting baffles are arranged in the annular separation channel and are uniformly arranged along the circumferential direction of the impact cone.
2. The coal pulverizer axial separator of claim 1, wherein the impact cone further comprises:
the lower part of the impact cone main body;
a connecting portion disposed between the striker cone body and the pointed cone portion;
wherein, follow the direction of feed of inlet pipe, striking awl main part lower part with the external diameter of connecting portion all expands gradually the setting, just the lateral wall of connecting portion with there is the contained angle between the lateral wall of striking awl main part lower part.
3. The coal pulverizer axial separator of claim 2, wherein the striker cone body lower portion, the connecting portion, and the pointed cone portion are all coaxially disposed.
4. The coal pulverizer axial separator of claim 3, wherein the impact cone is disposed coaxially with the feed pipe.
5. The coal pulverizer axial separator of claim 2, wherein the impact cone further comprises:
an impact cone body upper portion including a sidewall and a top wall;
wherein the side wall is arranged in a tapered manner along the feeding direction of the feeding pipe; the top wall is fixedly connected with the outer shell.
6. The coal pulverizer axial separator of claim 5, further comprising:
the container shrinkage part is fixedly arranged in the outer shell, and the outer diameter of the container shrinkage part is gradually reduced along the feeding direction of the feeding pipe;
the upper part of the impact cone main body is positioned in the shrinkage part, and the upper part of the impact cone main body and the shrinkage part form an annular discharge channel.
7. The coal pulverizer axial separator of claim 6, wherein an upper end surface of the volume shrinkage portion is connected with an inner top wall of the outer casing; the lower end face of the containing part is connected with the side wall of the outer shell.
8. The coal pulverizer axial separator of claim 1, wherein the feed pipe has a flared end;
the coal pulverizer axial separator further comprises:
the shrinkage cover is fixedly connected to the flared end, and the outer diameter of the shrinkage cover is gradually enlarged along the feeding direction of the feeding pipe;
wherein at least part of the tapered part is positioned in the shrinkage cavity cover, and an annular feeding channel is formed between the tapered part and the shrinkage cavity cover.
9. The coal pulverizer axial separator of claim 8, wherein a direction of extension of the side wall of the shrinkage cavity shroud is at an angle to a direction of extension of the side wall of the flared end.
10. The coal pulverizer axial separator of claim 8, wherein all of the pointed cone portions are located within the containment cap.
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| CN202010977836.2A CN112138848A (en) | 2020-09-16 | 2020-09-16 | Axial separator of coal mill |
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| CN202010977836.2A CN112138848A (en) | 2020-09-16 | 2020-09-16 | Axial separator of coal mill |
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| CN111617890A (en) * | 2020-04-29 | 2020-09-04 | 华电电力科学研究院有限公司 | Coarse powder separator for separating and returning powder and working method thereof |
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Application publication date: 20201229 |