JP2664061B2 - Air classifier - Google Patents
Air classifierInfo
- Publication number
- JP2664061B2 JP2664061B2 JP63101402A JP10140288A JP2664061B2 JP 2664061 B2 JP2664061 B2 JP 2664061B2 JP 63101402 A JP63101402 A JP 63101402A JP 10140288 A JP10140288 A JP 10140288A JP 2664061 B2 JP2664061 B2 JP 2664061B2
- Authority
- JP
- Japan
- Prior art keywords
- casing
- dispersion plate
- main shaft
- plate
- air classifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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- Combined Means For Separation Of Solids (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 この発明は空気分級機、特にセメント工業等の粉砕工
程において用いられる空気分級機に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air classifier, particularly to an air classifier used in a pulverizing process of the cement industry or the like.
従来の技術 従来、この種の空気分級機としてセメント工業、鉄鋼
業等、他の諸工業にて広く用いられている所謂スターテ
バント形セパレータと呼ばれる空気分級機は、例えば第
10図に示される様に内外二重のケーシング51内に分散板
53、分級羽根54、主羽根55等を竪形の主軸52にて吊下げ
回転するようになっており、上部の原料投入口56から供
給された原料57が回転する分散板53上に落下し、遠心力
によって原料57が分級室58内に分散される。他方、分散
板53と同軸に主軸52に設けられた主羽根55によって発生
された気流60は先ず内外ケーシング間の細粉室61内を旋
回しながら降下し、再び内側ケーシング内にベーン62を
介して吸込まれてベーン62によって旋回が付与され、上
昇する。この気流60は分級室58に入って分散板53にて分
散された原料57を分級羽根54の回転と共に粗粉66と細粉
67とに分級し、分級された粗粉66は落下して粗粉室65で
捕集される。一方、大部分の粗粉が取り除かれた細粉67
は気流60に乗って上昇して、分級羽根54にて更に分級さ
れて細粉室61に送られ、この細粉室61にてサイクロン効
果によって捕集される。2. Description of the Related Art Conventionally, as this type of air classifier, an air classifier called a so-called star tevent type separator widely used in other industries such as a cement industry and a steel industry is, for example,
As shown in Fig. 10, the dispersion plate
53, classification blades 54, main blades 55, etc. are suspended and rotated by a vertical main shaft 52, and a raw material 57 supplied from an upper raw material input port 56 falls onto a rotating dispersion plate 53. The raw material 57 is dispersed in the classification chamber 58 by centrifugal force. On the other hand, the air current 60 generated by the main blade 55 provided on the main shaft 52 coaxially with the dispersion plate 53 first descends while turning inside the fine powder chamber 61 between the inner and outer casings, and again through the vanes 62 into the inner casing. The swirl is given by the vane 62 and lifted. The airflow 60 enters the classifying chamber 58, and the raw material 57 dispersed by the dispersion plate 53 is mixed with the coarse powder 66 and the fine powder with the rotation of the classification blade 54.
The coarse powder 66 is dropped and collected in the coarse powder chamber 65. On the other hand, fine powder 67 from which most coarse powder was removed
Rises on the airflow 60, is further classified by the classification blades 54, is sent to the fine powder chamber 61, and is collected by the cyclone effect in the fine powder chamber 61.
発明が解決しようとする問題点 併し乍ら、この様なスターテバント形の空気分級機に
おいては次の様な問題点が見られる。Problems to be Solved by the Invention However, the following problems are found in such a startervant type air classifier.
（１）分級すべき原料57が主軸52を囲むようにして分散
板53上に投下されるが、この様な構造においては落下地
点の遠心力が不十分で、分級原料の分散が十分に行われ
ない。このために、凝集したまゝの粒子の一部は、分級
の機会を得ることなく、そのまゝ粗粉室65に落下するこ
とになり、分級効率が悪くなる。特に、粉体濃度が高い
と、その傾向が著しい。(1) The raw material 57 to be classified is dropped onto the dispersion plate 53 so as to surround the main shaft 52. In such a structure, the centrifugal force at the drop point is insufficient, and the classified raw material is not sufficiently dispersed. . For this reason, some of the aggregated particles will fall into the coarse powder chamber 65 without obtaining the opportunity for classification, and the classification efficiency will be degraded. In particular, when the powder concentration is high, the tendency is remarkable.
（２）粒度の調節は通常、主羽根55、調節弁70、分級羽
根54で行われるが、通常の製品の粒度調節は分級羽根54
の数の増減でなされる。この増減は通常人力によりなさ
れるが、分級機が大型になると、分級羽根54も大きくな
り、調整に多大な労力が必要となる。(2) The particle size is usually adjusted by the main blade 55, the control valve 70, and the classifying blade 54;
This is done by increasing or decreasing the number. This increase or decrease is usually performed manually, but as the classifier becomes larger, the classifier blades 54 also become larger, requiring a great deal of labor for adjustment.
（３）分級羽根54と調節弁70を支持する内筒天井71との
間には隙間が存在し、こゝから粗粒が細粉側に飛び込
み、分級効率が悪化することゝなる。(3) There is a gap between the classification blade 54 and the inner cylinder ceiling 71 that supports the control valve 70, from which coarse particles jump into the fine powder side, and the classification efficiency deteriorates.
（４）分級羽根54が大型のために、こゝでの圧力損失が
大きくなり、分級機の動力が増大する。この様な従来に
おける問題点を解決するために、上部分散板の外周に衝
突板を取付け、分級原料をこの衝突板にぶつけるような
構造にすることによって分級原料の分散を強化して、分
級羽根の形状を所定の好適な形状とすることにより分級
羽根の取り替えを簡単にし且つこの部分からの粗粒の飛
び込みを防止し、これによる流体抵抗と分級羽根による
遠心力との２つの力によって分級する空気分級機も既に
知られている。ところで、この種の空気分級機において
は、粉体を含有搬送する気流が外周から中心部に向かっ
て渦を描いて流れ込むので、空気分級機が大型化する
と、理論的に理想的な渦流の発生が困難で、回転数や原
料の供給量および粒度分布等を考慮しても、渦流に乱れ
を生じて鋭い分級が難しいという欠陥があった。(4) Since the classifying blades 54 are large, the pressure loss at this stage increases, and the power of the classifier increases. In order to solve such a conventional problem, a collision plate is attached to the outer periphery of the upper dispersion plate, and the classification material is bumped against the collision plate to enhance the dispersion of the classification material. Is made into a predetermined suitable shape to simplify the replacement of the classifying blades and prevent the coarse particles from jumping from this portion, thereby classifying by the two forces of fluid resistance and centrifugal force by the classifying blades. Air classifiers are already known. By the way, in this type of air classifier, the airflow containing the powder flows in a vortex from the outer periphery toward the center, so if the air classifier becomes large, theoretically ideal eddy currents are generated. However, even in consideration of the rotation speed, the supply amount of the raw material, the particle size distribution, and the like, there is a defect that turbulence is generated in the vortex and it is difficult to perform sharp classification.
したがって、この発明の目的は、大型化しても渦流に
乱れの生ずることがなく、鋭い分級ができる空気分級機
を提供することにある。Accordingly, an object of the present invention is to provide an air classifier capable of sharp classification without causing turbulence in the vortex even if the size is increased.
問題点を解決するための手段 上記目的を達成するために、この発明は、上部がほゞ
円筒状で下部がほゞ円錐状のホッパー形をなした内外ケ
ーシングから成る二重構造のケーシング、該ケーシング
の内ケーシングのほゞ軸心に垂下し上部に主羽根を有す
る回転する主軸、主軸下端に設けられた下部分散板およ
び該下部分散板と間隔を置いて設けられた上部分散板、
主軸下端の下部分散板の上に原料を供給するようケーシ
ングの頂部に設けられた原料投入口を備えた空気分級機
において、上部分散板の上面周方向に等間隔に複数個の
渦流調整片を設け、または、該渦流調整片の上端部を取
り囲むようにシール金物を設け、さらに、渦流調整片を
上外方に傾斜した渦流調整片とし、さらにまた、渦流調
整片の外側に補助用の二次ベーンを設けたものである。Means for Solving the Problems In order to achieve the above object, the present invention relates to a casing having a double structure comprising an inner and outer casing in the form of a hopper having a substantially cylindrical upper portion and a substantially conical lower portion. A rotating main shaft that has a main blade at an upper portion that hangs down from about an axis of an inner casing of the casing, a lower dispersion plate provided at a lower end of the main shaft, and an upper dispersion plate provided at an interval from the lower dispersion plate;
In an air classifier provided with a material input port provided at the top of a casing so as to supply a material onto a lower dispersion plate at the lower end of a main spindle, a plurality of vortex flow adjusting pieces are arranged at equal intervals in a circumferential direction of an upper surface of an upper dispersion plate. Or a seal metal is provided so as to surround the upper end of the eddy current adjustment piece, and the eddy current adjustment piece is a vortex flow adjustment piece that is inclined upward and outward. The next vane is provided.
作用 従って、この発明の上述の構成により、原料投入口か
ら下部分散板の上に供給された原料は遠心力によって放
射方向に飛ばされて必要がある場合には衝突板で分散さ
れ、渦流調整片とシール金物にて粗粉の細粉への飛び込
み混入が阻止されると共に渦流調整片によって所要の分
級点を設定でき、補助用の二次ベーンによって理想的な
渦流を分級室内に導入できて、必要な分級領域が確保で
き、且つ分級効率の向上を計ることが出来る。Therefore, according to the above-described structure of the present invention, the raw material supplied from the raw material input port onto the lower dispersion plate is scattered by the centrifugal force in the radial direction and dispersed by the impingement plate if necessary. In addition, the mixing of the coarse powder into the fine powder is prevented by the seal metal and the required classification point can be set by the eddy current adjustment piece, and the ideal vortex can be introduced into the classification chamber by the auxiliary secondary vane. A necessary classification area can be secured, and the classification efficiency can be improved.
実 施 例 第１図には、上部分散板の外周に衝突板を取付け、分
級原料をこの衝突板にぶっつけて原料の分散を強化した
既に知られた空気分級機が示されている。この空気分級
機は、円筒部31、32と円錐部33、34を夫々有するホッパ
ー形の二重構造の内外ケーシング11、12から成るケーシ
ング10と、内ケーシング11の円筒部31軸心に垂下し上部
に主羽根15を有する回転する主軸14と、主軸14の下端に
上下に間隔を置いて設けられた上部分散板16および下部
分散板17と、上部分散板16の周辺上部に設けられた分級
羽根18と、上部分散板16の外周に下外方に傾斜して設け
られた陣笠状の衝突板19と、主軸14の下端の下部分散17
上に原料25を供給するようケーシング10の上部に設けら
れた原料投入口24とから主に構成されている。二重構造
のケーシング10は、上部がほゞ円筒状の円筒部31、32と
下部がほゞ円錐状のホッパー形の円錐部33、34とを夫々
有する内外ケーシング11、12とから成り、内ケーシング
11の円筒部31内に分級室20が形成され、更にこの内ケー
シング11の円錐部33の上部外周に複数個のベーン23が環
状に配置されると共に、粗粉室２を形成する円錐部33の
下端に粗粉回収口35が設けられ、内外ケーシング11、12
間に細粉室21が形成され、外ケーシング12の円錐部34の
下端に細粉回収口36が設けられている。ケーシング10の
外ケーシング12の頂部から内ケーシング11の内部に垂下
し回転する主軸14には主羽根15と上部分散板16と下部分
散板17と分級羽根18と衝突板19とが設けられており、必
要に応じては主軸14を二重構造として主羽根15や上下分
散板16、17や分級羽根18を夫々独立して回転させること
が出来る。EXAMPLE FIG. 1 shows a known air classifier in which a collision plate is attached to the outer periphery of an upper dispersion plate, and the classified raw material is bumped against the collision plate to enhance the dispersion of the raw material. This air classifier has a casing 10 consisting of inner and outer casings 11, 12 of a hopper-type double structure having cylindrical parts 31, 32 and conical parts 33, 34, respectively, and a casing 10 hanging down from the cylindrical part 31 axis of the inner casing 11. A rotating main shaft 14 having a main blade 15 at an upper portion, an upper dispersion plate 16 and a lower dispersion plate 17 provided at a lower end of the main shaft 14 at intervals above and below, and a classification provided at an upper peripheral portion of the upper dispersion plate 16. A blade 18, a fin-shaped collision plate 19 provided on the outer periphery of the upper dispersion plate 16 so as to be inclined downward and outward, and a lower dispersion 17 at the lower end of the main shaft 14.
It mainly comprises a raw material inlet 24 provided on the upper part of the casing 10 so as to supply the raw material 25 thereon. The casing 10 having a double structure includes inner and outer casings 11, 12 each having a cylindrical portion 31, 32 having a substantially cylindrical upper portion and a hopper-shaped conical portion 33, 34 having a substantially lower conical portion. casing
A classifying chamber 20 is formed in a cylindrical portion 31 of the inner casing 11, and a plurality of vanes 23 are annularly arranged on an outer periphery of a conical portion 33 of the inner casing 11, and a conical portion 33 forming the coarse powder chamber 2 is formed. A coarse powder collecting port 35 is provided at the lower end of the inner and outer casings 11 and 12.
A fine powder chamber 21 is formed therebetween, and a fine powder recovery port 36 is provided at a lower end of the conical portion 34 of the outer casing 12. A main shaft 14 that hangs down from the top of the outer casing 12 of the casing 10 to the inside of the inner casing 11 and rotates is provided with a main blade 15, an upper dispersion plate 16, a lower dispersion plate 17, a classification blade 18, and an impingement plate 19. If necessary, the main shaft 14 has a double structure, and the main blade 15, the upper and lower dispersion plates 16, 17 and the classifying blade 18 can be independently rotated.
図示される様に、主軸14の下端に設けられた下部分散
板17に対応して間隔を置いて上部分散板16が設けられ、
この上部分散板16の外周に陣笠状の衝突板19が設けられ
ていて、下部分散板17上に供給された原料25がこれら上
部分散板16と下部分散板17の遠心力により状部分散板16
の下面に沿って放射方向に飛ばされてこの陣笠状の衝突
板19に衝突して方向が変えられて分級室20に送られるよ
うになっている。また、上部分散板16の上面外周には分
級羽根18が設けられていて、主羽根15と共に循環気流を
発生して衝突板19により好適に分散された原料粒子を良
好に分級するようになっている。ケーシング10の外ケー
シング12の頂部に分級すべき原料25を投入するために原
料投入口24が設けられ、原料25がエアスライドの様な適
宜な輸送手段を介して供給されるようになっている。ま
た、この様な原料投入口24は図示の如く１箇所設けられ
るが、必要により２箇所以上複数箇所を設けることも出
来る。As shown, an upper dispersion plate 16 is provided at an interval corresponding to a lower dispersion plate 17 provided at the lower end of the main shaft 14,
A rim-shaped collision plate 19 is provided on the outer periphery of the upper dispersion plate 16, and the raw material 25 supplied on the lower dispersion plate 17 is separated by the centrifugal force of these upper dispersion plate 16 and lower dispersion plate 17. 16
Is radiated in the radial direction along the lower surface of the colliding plate 19, collides with the fin-shaped collision plate 19, is changed in direction, and is sent to the classification room 20. Further, a classification blade 18 is provided on the outer periphery of the upper surface of the upper dispersion plate 16, so that a circulating air flow is generated together with the main blade 15 so that the raw material particles suitably dispersed by the collision plate 19 are classified well. I have. A raw material inlet 24 is provided at the top of the outer casing 12 of the casing 10 for charging a raw material 25 to be classified, and the raw material 25 is supplied via an appropriate transport means such as an air slide. . Further, such a raw material inlet 24 is provided at one place as shown in the figure, but two or more places may be provided as necessary.
この様に構成された空気分級機における差動状態は次
の通りである。The differential state of the air classifier thus configured is as follows.
第１図に示される空気分級機において、図示しない駆
動装置によって主軸14、主軸14に取付けられた主羽根1
5、上部分散板16、下部分散板17、分級羽根18、衝突板1
9が一体に回転される。必要に応じて、主軸14を二重管
構造として独立的に主羽根15の回転数を増減できるよう
にして、原料25の分級に必要な循環気流を増減して、分
級点の調整または分級精度の向上を図ることが好適に出
来る。In the air classifier shown in FIG. 1, a main shaft 14 and a main blade 1 attached to the main shaft 14 by a driving device (not shown).
5, upper dispersion plate 16, lower dispersion plate 17, classification blade 18, collision plate 1
9 is rotated together. If necessary, the spindle 14 has a double pipe structure so that the number of revolutions of the main blade 15 can be independently increased or decreased, and the circulating airflow required for classification of the raw material 25 is increased or decreased to adjust the classification point or the classification accuracy. Can be suitably improved.
他方、原料投入口24から投入された原料25は下部分散
板17の上に入り、回転するこの下部分散板17の遠心力に
よって放射方向すなわち外周方向に飛ばされるが、殆ど
の原料は上部分散板16に下面に沿って動く。従って、図
示される様に、上部分散板16の外周に陣笠状の衝突板19
が設けられることによって分級原料25がこの衝突板19に
衝突して分散が強化されて好適にほぐされ、こゝで原料
25は外向きの遠心力と、半径方向内向きの空気抵抗との
方向の相反する２つの力を同時に受け、これら２つの力
の釣り合い状態にある粒子径を分級点として分級点以下
の粒子すなわち細粉は外向きの遠心力より内向きの空気
抵抗が大きくなって主羽根15と分級羽根18とにより発生
される循環気流に乗って内外ケーシング11、12間の細粉
室21でのサイクロン効果によって気流中の細粉が回収さ
れて、細粉回収口36から回収排出される。次いで、気流
はベーン23を介して内ケーシング11内に吸込まれてベー
ン23によって旋回が付与されて上昇する。また、分級室
20内にて分級された粗粉は落下して内ケーシング11の円
錐部33にて捕集されて粗粉回収口35から回収排出され
る。On the other hand, the raw material 25 introduced from the raw material input port 24 enters the lower dispersion plate 17 and is blown in the radial direction, that is, the outer peripheral direction by the centrifugal force of the rotating lower dispersion plate 17, but most of the raw material is in the upper dispersion plate. 16 moves along the underside. Therefore, as shown in the figure, a skirt-shaped collision plate 19
Is provided, the classified raw material 25 collides with the collision plate 19, and the dispersion is strengthened to be suitably loosened.
25 receives simultaneously two opposing forces in the directions of an outward centrifugal force and a radially inward air resistance, and sets the particle diameter in a state where these two forces are balanced as the classification point, ie, particles below the classification point, The fine powder has a greater inward air resistance than the outward centrifugal force, and rides on the circulating airflow generated by the main blades 15 and the classifying blades 18 to provide a cyclone effect in the fine powder chamber 21 between the inner and outer casings 11 and 12. As a result, the fine powder in the airflow is collected and collected and discharged from the fine powder collecting port 36. Next, the airflow is sucked into the inner casing 11 via the vane 23, and the airflow is swirled by the vane 23 and rises. Classification room
The coarse powder classified in 20 falls, is collected by the conical portion 33 of the inner casing 11, and is collected and discharged from the coarse powder collecting port 35.
この様に、上部分散板16に設けられた陣笠状の衝突板
19によって原料25は分散が強化されて好適に分散される
ので、従来においては細粉となるべき粒子が凝集して粗
粉として分級されるようなことが防止され、分級効率が
改善される。すなわち、この様な衝突板19が上部分散板
16に無いと、分級原料25の分散が何等好適に行われるこ
とがない。また、衝突板19が垂直下方に円筒状に設置さ
れると、この円筒状の衝突板に衝突した原料は分級気流
に乗らないで下方に落下し、粗粉として回収されてしま
って分級効率が悪化する。併し、図示の如く陣笠状の衝
突板19が設けられると、分級原料25はこの衝突板19によ
って良好にほぐされて分散が強化され、分散効率が改善
される。In this way, the fin-shaped collision plate provided on the upper dispersion plate 16
Since the dispersion of the raw material 25 is enhanced and suitably dispersed by the method 19, it is possible to prevent the particles which are to be fine powder from being aggregated and classified as coarse powder in the related art, and the classification efficiency is improved. That is, such an impact plate 19 serves as an upper dispersion plate.
If it is not 16, dispersion of the classified raw material 25 will not be performed at all. Also, when the collision plate 19 is installed vertically in a cylindrical shape, the raw material colliding with the cylindrical collision plate falls downward without riding in the classification airflow, is collected as coarse powder, and the classification efficiency is reduced. Getting worse. At the same time, when the dashed collision plate 19 is provided as shown in the drawing, the classification material 25 is loosened satisfactorily by the collision plate 19 to enhance dispersion and improve dispersion efficiency.
第２図および第３図は、第１図の空気分級機に本発明
を適用したもので、複数個の渦流調整片26が上部分散板
16の周方向に設けられ、これら渦流調整片26の上端部を
囲むような形状に内ケーシング11の天井部28の下部にシ
ール金物27が設けられると共に、渦流調整片16のほゞ中
程に仕切板29が設けられて、分級室20を仕切板29により
横に区切って複数室に仕切っている。分級原理は第１図
の空気分級機と同じで、特に大型化した空気分級機にて
分級原料の大量処理に適しており、空気分級機の小型軽
量化に好適である。FIGS. 2 and 3 show the application of the present invention to the air classifier shown in FIG. 1. In FIG.
A seal metal 27 is provided in the lower part of the ceiling portion 28 of the inner casing 11 in a shape surrounding the upper end of the eddy current adjusting piece 26, and is provided in the middle of the eddy current adjusting piece 16. A partition plate 29 is provided, and the classifying chamber 20 is divided into a plurality of chambers by being horizontally divided by the partition plate 29. The principle of classification is the same as that of the air classifier shown in FIG. 1. Especially, a large-sized air classifier is suitable for large-scale processing of classified materials, and is suitable for reducing the size and weight of the air classifier.
すなわち、第２図および第３図の空気分級機の分級室
20内において、粉体を含有搬送する気流は外周から中心
部に向かって渦を描いて流れ込むのが、空気分級機が大
型化すると、理論的に理想な渦流の発生が困難で、回転
数や原料の供給量および粒度分布等を考慮しても渦流に
乱れを生じて鋭い分級が困難となるので、この様な困難
を解決するために渦流調整片26および仕切板29によって
大型の空気分級機においても渦流に乱れを生じることの
ないようにして鋭い分級を可能にしている。That is, the classifying chamber of the air classifier shown in FIGS. 2 and 3.
In 20, the air flow containing and conveying the powder flows in a swirl from the outer periphery toward the center, but when the air classifier becomes large, it is difficult to generate theoretically ideal swirl, and the rotation speed and Even if the supply amount of the raw material and the particle size distribution are taken into consideration, turbulence occurs in the vortex and it becomes difficult to sharply classify the material.To solve such difficulties, a large air classifier is provided by the vortex flow adjusting piece 26 and the partition plate 29. In this case, sharp classification is made possible without causing turbulence in the vortex.
この様な渦流調整片26を設けることによって、分級羽
根18を小形軽量化できるために粒度調整に必要だった分
級羽根18の取替作業が大幅に軽減でき、更にこの部分に
おける圧力損失も低減できるために分級機の動力も低減
出来る。また、渦流調整片26は所要分級点を考慮して、
空気分級機の大きさや回転数等に応じて上部分散板16上
に周方向に等間隔に複数個取付けるのが好適で、上部分
散板16上の半径方向外側に設けるほど粉体の分級点を細
かくすることができる。更に、シール金物27を設けるこ
とによって、従来、空気分級機の内ケーシング11の天井
部28と分級羽根18との間より細粒側に飛び込んでいた粗
粒の飛び込みを防止でき、分級効率を一層改善できる。
また、空気分級機の内ケーシング11内の分級室20を横に
区切って複数室とする仕切板29は分級流線の縦方向分速
度の変位変動の影響を小さくして分級精度を向上するこ
とが出来、仕切られる室の数は分級点と分級精度を考慮
して分級室の大きさにより適宜定めることが出来る。By providing such a swirl flow adjusting piece 26, the size of the classifying blade 18 can be reduced in size and weight, so that the replacement work of the classifying blade 18 required for particle size adjustment can be greatly reduced, and the pressure loss in this portion can be further reduced. Therefore, the power of the classifier can be reduced. In addition, the eddy current adjustment piece 26 takes the required classification point into consideration,
It is preferable that a plurality of the air classifiers are mounted at equal intervals in the circumferential direction on the upper dispersion plate 16 in accordance with the size and the number of rotations of the air classifier. It can be fine. Further, by providing the seal metal 27, it is possible to prevent coarse particles from jumping into the finer grain side than between the ceiling portion 28 of the inner casing 11 of the air classifier and the classifier blade 18 in the past, thereby further improving the classifying efficiency. Can be improved.
In addition, the partition plate 29, which divides the classifying chamber 20 in the inner casing 11 of the air classifier into a plurality of chambers, reduces the influence of the displacement fluctuation of the vertical dividing speed of the classifying streamline to improve the classification accuracy. The number of chambers to be separated can be determined as appropriate according to the size of the classification room in consideration of the classification point and the classification accuracy.
また、第４図乃至第６図は渦流調整片26を上部分散板
16上に所要の位置と角度をもって取付ける配置例を示す
もので、渦流調整片26の取付位置と角度の調節によって
所要の分級点を設定することが出来る。また、仕切板29
は上述した様に、分級室20を横に区切って複数室とな
し、この様な仕切板29によって渦流の縦方向分速度の変
位変動の影響を小さくして分級精度を向上することが出
来る。4 to 6 show the eddy current adjusting piece 26 as an upper dispersion plate.
This is an example of an arrangement in which the eddy current adjusting piece 26 is attached at a required position and at an angle on the surface 16, and a required classification point can be set by adjusting the attachment position and the angle of the eddy current adjusting piece 26. Also, the partition plate 29
As described above, the classifying chamber 20 is divided horizontally into a plurality of chambers. With such a partition plate 29, the influence of the displacement fluctuation of the vertical vortex velocity in the vertical direction can be reduced to improve the classification accuracy.
第７図はこの発明の空気分級機の第２の実施例を示す
もので、第２図の空気分級機において、渦流調整片26が
上部分散板16上に上外方に傾斜しており、空気分級機が
小型の場合に上部分散板16の上面と内ケーシング11の天
井部28の下面とで形成される分級室が小さくなり、必要
な分級領域が確保出来ない場合に、この様な形状の渦流
調整片とすることが有効である。FIG. 7 shows a second embodiment of the air classifier of the present invention. In the air classifier of FIG. 2, the swirl adjusting member 26 is inclined upward and outward on the upper dispersion plate 16, When the air classifier is small, the classifying chamber formed by the upper surface of the upper dispersion plate 16 and the lower surface of the ceiling portion 28 of the inner casing 11 becomes small, and when a necessary classifying area cannot be secured, such a shape is required. Is effective.
特に、この様な傾斜した渦流調整片26に就いて考察す
るために、第7A図に示される様に、上部分散板16と内ケ
ーシング11の天井部28との間の間隔h1が狭く、従って十
分大きな必要な分級領域が取り難いが、渦流調整片26の
傾斜によって渦流調整片26の長さh2は間隔h1より大きく
なり、従って分散領域を大きく取ることが出来て分級効
果が一層改善される。また、渦流調整片26を傾斜設置す
ることによって渦流調整片26の内側の端部の直径d1が外
側の端部の直径d2よりも小さく、従って渦流調整片26の
内側端に比べて外側端は周速を速く出来る。他方、分級
空気は渦流調整片26の上端の方が下端におけるよりも流
速が速くなるから、渦流調整片26を傾斜することによっ
て分級点を同一にすることができ、一層理想的な分級が
可能となる。更に、この様な渦流調整片26と陣笠状の衝
突板19との組合せによって、分級室20に入る気流を導入
する整流板の役目をなし、渦流調整片26を経た分級室20
内における分級点を同一にする効果を相乗的に高めるこ
とが出来る。In particular, in order to consider concerning the vortex adjusting pieces 26 was such inclination, as shown in Figure 7A, closely spaced h 1 between the ceiling portion 28 of the inner casing 11 and the upper dispersing plate 16, Thus hardly taken sufficiently large required classifying region, but the length h 2 of the vortex adjusting pieces 26 is larger than the distance h 1 by the inclination of the vortex adjusting pieces 26, thus to be able to take the dispersion region largely classified effect more Be improved. In addition, since the eddy current adjustment piece 26 is installed at an angle, the diameter d 1 of the inner end of the eddy current adjustment piece 26 is smaller than the diameter d 2 of the outer end thereof. The end can make the peripheral speed faster. On the other hand, the classification air has a higher flow velocity at the upper end of the swirl flow adjustment piece 26 than at the lower end, so that the classification point can be made the same by inclining the swirl flow adjustment piece 26, and more ideal classification is possible. Becomes Further, the combination of the eddy current adjusting piece 26 and the fin-shaped collision plate 19 serves as a rectifying plate for introducing the airflow entering the classification chamber 20, and the classification chamber 20 passing through the eddy current adjusting piece 26.
The effect of making the classification points the same can be synergistically enhanced.
第８図および第９図はこの発明の空気分級機の第３の
実施例を示すもので、第２図に示される実施例のものに
加えて空気分級機の内ケーシング11の天井部28に渦流調
整片26の外側を取り囲むように二次ベーン30が付設され
て、内ケーシング11の円錐部33の上部のベーン23にて形
成された旋回流を更に強化して水平な渦流を形成するよ
うにしている。この様にして、水平な渦流が形成される
ために理想的な渦流を内ケーシング11内の分級室20内に
導入することが出来るようになり、分級効果が一層向上
される。FIGS. 8 and 9 show a third embodiment of the air classifier of the present invention. In addition to the embodiment shown in FIG. 2, the air classifier is mounted on the ceiling 28 of the inner casing 11 of the air classifier. A secondary vane 30 is provided so as to surround the outside of the swirl flow adjusting piece 26, so that the swirl flow formed by the vane 23 above the conical portion 33 of the inner casing 11 is further enhanced to form a horizontal swirl flow. I have to. In this way, since a horizontal vortex is formed, an ideal vortex can be introduced into the classification chamber 20 in the inner casing 11, and the classification effect is further improved.
発明の効果 以上の如く構成作用するこの発明の空気分級機は、構
造が簡単で、設備が安価に製造でき、動力消費が少なく
て且つ据付スペースが少ない等の通常のスターテバンド
型の空気分級機における利点を一層向上すると共に、従
来機器における欠点を解消し、更に次の様な特有の効果
を奏するものである。Effect of the Invention The air classifier of the present invention having the above-described structure and operation has a simple starter band type air classifier which has a simple structure, can be manufactured at low cost, consumes little power, and has a small installation space. The advantages of the present invention are further improved, the disadvantages of the conventional machine are eliminated, and the following specific effects are exhibited.
すなわち、この発明の空気分級機においては、上部分
散板の上面周方向に等間隔に複数個の渦流調整片が設け
られているので、大型化しても、渦流に乱れが生じるこ
とがなく、鋭い分級を行うことができると共に、この渦
流調整片の上端部を囲むようにシール金物が設けられる
ことによって、粗粉が細粒側に飛び込むことが防止され
て分級効果および分級精度が一層向上され、且つこれに
よって分級羽根が小形軽量化できるために粒度調整に必
要だった分級羽根の取替作業が大幅に軽減されると共
に、分級羽根部分における圧力損失も低減できるために
空気分級機の動力も軽減できる。更に、渦流調整片を傾
斜して配設することによって上部分散板と内ケーシング
の天井部との間の分級室の高さが狭くても十分に必要な
分級領域を確保することができる。また、渦流調整片を
取り囲んで二次ベーンを設けることによって内ケーシン
グの一次ベーンにて形成された旋回渦流を一層強化して
水平な渦流を形成して理想的な渦流を内ケーシング内の
分級室内に導入でき、分級効率を向上することが出来る
等の効果が見られる。That is, in the air classifier of the present invention, since a plurality of eddy current adjusting pieces are provided at equal intervals in the circumferential direction of the upper surface of the upper dispersion plate, even if the size is increased, turbulence does not occur in the eddy current and the sharpness is sharp. Classification can be performed, and the seal metal is provided so as to surround the upper end portion of the eddy current adjusting piece, so that coarse powder is prevented from jumping into the fine particle side, and the classification effect and the classification accuracy are further improved, In addition, the size and weight of the classifying blades can be reduced, so the work of replacing classifying blades, which was necessary for adjusting the particle size, is greatly reduced, and the pressure loss in the classifying blades is also reduced, which reduces the power of the air classifier. it can. Further, by arranging the vortex flow adjusting pieces at an angle, a sufficient classification area can be secured even if the height of the classification chamber between the upper dispersion plate and the ceiling of the inner casing is narrow. Further, by providing a secondary vane surrounding the vortex flow adjusting piece, the swirling vortex formed by the primary vane of the inner casing is further strengthened to form a horizontal vortex, and an ideal vortex is formed in the classifying chamber in the inner casing. And the effect of improving the classification efficiency can be seen.
第１図は既に知られている空気分級機の縦断面概要図、
第２図はこの発明の実施例を示す空気分級機の縦断面概
要図、第３図は第２図のIII−III線に沿った横断面図、
第４図乃至第６図は渦流調整片の取付例を示す横断面
図、第７図は第２の実施例を示す空気分級機の縦断面
図、第7A図は第７図の渦流調整片の拡大部分図、第８図
は第３の実施例を示す空気分級機の縦断面図、第９図は
第８図のIX−IX線に沿った横断面図、第10図は従来の空
気分級機を示す縦断面概要図である。図中、10:ケーシ
ング、11:内ケーシング、12:外ケーシング、14:主軸、1
5:主羽根、16:上部分散板、17:下部分散板、18:分級羽
根、19:衝突板、20:分級室、21:細粉室、23:ベーン、2
4:原料投入口、25:原料、26:渦流調整片、27:シール金
物、28:天井部、29:仕切板、30:二次ベーン、31、32:円
筒部、33、34:円錐部、35:粗粉回収口、36:細粉回収
口。FIG. 1 is a schematic longitudinal sectional view of a known air classifier,
2 is a schematic longitudinal sectional view of an air classifier showing an embodiment of the present invention, FIG. 3 is a transverse sectional view taken along the line III-III of FIG.
4 to 6 are cross-sectional views showing an example of mounting the eddy current adjusting piece, FIG. 7 is a longitudinal sectional view of an air classifier showing the second embodiment, and FIG. 7A is the eddy current adjusting piece shown in FIG. 8 is a longitudinal sectional view of an air classifier showing a third embodiment, FIG. 9 is a transverse sectional view taken along line IX-IX in FIG. 8, and FIG. 10 is a conventional air classifier. It is a longitudinal section schematic diagram showing a classifier. In the figure, 10: casing, 11: inner casing, 12: outer casing, 14: spindle, 1
5: Main blade, 16: Upper dispersion plate, 17: Lower dispersion plate, 18: Classification blade, 19: Impact plate, 20: Classification room, 21: Fine powder room, 23: Vane, 2
4: Raw material inlet, 25: Raw material, 26: Eddy current adjusting piece, 27: Seal hardware, 28: Ceiling, 29: Partition plate, 30: Secondary vane, 31, 32: Cylindrical part, 33, 34: Conical part , 35: coarse powder recovery port, 36: fine powder recovery port.
Claims (9)
ッパー形をなした内外ケーシングから成る二重構造のケ
ーシング、該ケーシングの内ケーシングのほぼ軸心に垂
下し、上部に主羽根を有する回転可能な主軸、該主軸下
端に設けられた下部分散板および該下部分散板と間隔を
置いて設けられた上部分散板、主軸下端の下部分散板の
上に原料を供給するようケーシングの頂部に設けられた
原料投入口を備え、前記上部分散板の上面周方向に等間
隔に複数個の渦流調整片が設けられたことを特徴とする
空気分級機。A casing having a double structure comprising an inner casing and an outer casing having a substantially cylindrical upper portion and a substantially conical lower portion, wherein the casing is suspended substantially at the axis of an inner casing of the casing, and a main blade is provided at an upper portion. A rotatable main shaft, a lower dispersion plate provided at the lower end of the main shaft, an upper dispersion plate provided at a distance from the lower distribution plate, An air classifier, comprising: a raw material input port provided in the upper dispersion plate;
ッパー形をなした内外ケーシングから成る二重構造のケ
ーシング、該ケーシングの内ケーシングのほぼ軸心に垂
下し、上部に主羽根を有する回転可能な主軸、該主軸下
端に設けられた下部分散板および該下部分散板と間隔を
置いて設けられた上部分散板、主軸下端の下部分散板の
上に原料を供給するようケーシングの頂部に設けられた
原料投入口を備え、上部分散板の上面周方向に等間隔に
複数個の渦流調整片が設けられ、該渦流調整片の上端部
を取り囲むようにシール金物が設けられたことを特徴と
する空気分級機。2. A casing of a double structure comprising an inner casing and an outer casing having a substantially cylindrical upper part and a lower part having a substantially conical hopper shape. The casing is suspended substantially at the axis of the inner casing of the casing, and a main blade is provided at the upper part. A rotatable main shaft, a lower dispersion plate provided at a lower end of the main shaft, an upper distribution plate provided at a distance from the lower dispersion plate, and a top portion of a casing for supplying raw materials onto the lower distribution plate at a lower end of the main shaft. A plurality of eddy current adjustment pieces are provided at regular intervals in the circumferential direction of the upper surface of the upper dispersion plate, and a seal metal is provided so as to surround the upper end of the eddy current adjustment piece. Characterized air classifier.
ッパー形をなした内外ケーシングから成る二重構造のケ
ーシング、該ケーシングの内ケーシングのほぼ軸心に垂
下し、上部に主羽根を有する回転可能な主軸、該主軸下
端に設けられた下部分散板および該下部分散板と間隔を
置いて設けられた上部分散板、主軸下端の下部分散板の
上に原料を供給するようケーシングの頂部に設けられた
原料投入口を備え、前記上部分散板の下面外周に陣笠状
の衝突板が設けられると共に、前記上部分散板の上面周
方向に等間隔に複数個の渦流調整片が設けられたことを
特徴とする空気分級機。3. A casing having a double structure comprising an inner and outer casing having a hopper shape having a substantially cylindrical upper portion and a substantially conical lower portion. The casing is suspended substantially at the axis of the inner casing of the casing, and the main blades are disposed on the upper portion. A rotatable main shaft, a lower dispersion plate provided at a lower end of the main shaft, an upper distribution plate provided at a distance from the lower dispersion plate, and a top portion of a casing for supplying raw materials onto the lower distribution plate at a lower end of the main shaft. In addition, a raw material inlet is provided, a fin-shaped collision plate is provided on the outer periphery of the lower surface of the upper dispersion plate, and a plurality of eddy current adjustment pieces are provided at equal intervals in the circumferential direction of the upper surface of the upper dispersion plate. An air classifier characterized by that:
ッパー形をなした内外ケーシングから成る二重構造のケ
ーシング、該ケーシングの内ケーシングのほぼ軸心に垂
下し、上部に主羽根を有する回転可能な主軸、該主軸下
端に設けられた下部分散板および該下部分散板と間隔を
置いて設けられた上部分散板、主軸下端の下部分散板の
上に原料を供給するようケーシングの頂部に設けられた
原料投入口を備え、前記上部分散板の下面外周に陣笠状
の衝突板が設けられ、前記上部分散板の上面周方向に等
間隔に複数個の渦流調整片が設けられると共に、該渦流
調整片の上端部を取り囲むようにシール金物が設けられ
たことを特徴とする空気分級機。4. A casing of a double structure comprising an inner casing and an outer casing having a substantially cylindrical upper part and a substantially conical lower part having a hopper shape. The casing is suspended substantially at the axis of the inner casing of the casing, and the main blade is disposed at the upper part. A rotatable main shaft, a lower dispersion plate provided at a lower end of the main shaft, an upper distribution plate provided at a distance from the lower dispersion plate, and a top portion of a casing for supplying raw materials onto the lower distribution plate at a lower end of the main shaft. A raw material inlet is provided, a fin-shaped collision plate is provided on the outer periphery of the lower surface of the upper dispersion plate, and a plurality of eddy current adjustment pieces are provided at equal intervals in the upper surface peripheral direction of the upper dispersion plate, An air classifier, wherein a seal metal is provided so as to surround an upper end portion of the eddy current adjusting piece.
ッパー形をなした内外ケーシングから成る二重構造のケ
ーシング、該ケーシングの内ケーシングのほぼ軸心に垂
下し、上部に主羽根を有する回転可能な主軸、該主軸下
端に設けられた下部分散板および該下部分散板と間隔を
置いて設けられた上部分散板、主軸下端の下部分散板の
上に原料を供給するようケーシングの頂部に設けられた
原料投入口を備え、前記上部分散板の上面周方向に等間
隔に且つ上外方に傾斜した複数個の渦流調整片が設けら
れたことを特徴とする空気分級機。5. A double-layer casing comprising an inner casing and an outer casing having a substantially cylindrical upper part and a substantially conical lower part in a hopper shape. The casing is suspended substantially at the axis of the inner casing, and the main blade is disposed at the upper part. A rotatable main shaft, a lower dispersion plate provided at a lower end of the main shaft, an upper distribution plate provided at a distance from the lower dispersion plate, and a top portion of a casing for supplying raw materials onto the lower distribution plate at a lower end of the main shaft. An air classifier, comprising a plurality of vortex adjusting pieces which are provided at equal intervals in the circumferential direction of the upper surface of the upper dispersion plate and are inclined upward and outward.
ッパー形をなした内外ケーシングから成る二重構造のケ
ーシング、該ケーシングの内ケーシングのほぼ軸心に垂
下し、上部に主羽根を有する回転可能な主軸、該主軸下
端に設けられた下部分散板および該下部分散板と間隔を
置いて設けられた上部分散板、主軸下端の下部分散板の
上に原料を供給するようケーシングの頂部に設けられた
原料投入口を備え、前記上部分散板の上面周方向に等間
隔に且つ上外方に傾斜した複数個の渦流調整片が設けら
れ、該渦流調整片の上端部を取り囲むようにシール金物
が設けられたことを特徴とする空気分級機。6. A double-structure casing comprising an inner casing and an outer casing having an upper portion having a substantially cylindrical shape and a lower portion having a substantially conical hopper shape, wherein the casing hangs substantially at an axis of the inner casing, and a main blade is provided at an upper portion. A rotatable main shaft, a lower dispersion plate provided at a lower end of the main shaft, an upper distribution plate provided at a distance from the lower dispersion plate, and a top portion of a casing for supplying raw materials onto the lower distribution plate at a lower end of the main shaft. A plurality of eddy current adjustment pieces are provided at equal intervals in the circumferential direction of the upper surface of the upper dispersion plate and inclined upward and outward, so as to surround the upper end of the eddy current adjustment piece. An air classifier characterized by having a seal fitting.
ッパー形をなした内外ケーシングから成る二重構造のケ
ーシング、該ケーシングの内ケーシングのほぼ軸心に垂
下し、上部に主羽根を有する回転可能な主軸、該主軸下
端に設けられた下部分散板および該下部分散板と間隔を
置いて設けられた上部分散板、主軸下端の下部分散板の
上に原料を供給するようケーシングの頂部に設けられた
原料投入口を備え、前記上部分散板の下面外周に陣笠状
の衝突板が設けられると共に、前記上部分散板の上面周
方向に等間隔に且つ上外方に傾斜した複数個の渦流調整
片が設けられたことを特徴とする空気分級機。7. A casing having a double structure comprising an inner casing and an outer casing having a substantially cylindrical upper portion and a substantially conical lower portion, wherein the casing is suspended substantially at the axis of the inner casing, and a main blade is provided at the upper portion. A rotatable main shaft, a lower dispersion plate provided at a lower end of the main shaft, an upper distribution plate provided at a distance from the lower dispersion plate, and a top portion of a casing for supplying raw materials onto the lower distribution plate at a lower end of the main shaft. A raw material input port is provided, and a cascade-shaped collision plate is provided on the outer periphery of the lower surface of the upper dispersion plate, and a plurality of inclined inclined upward and outward at equal intervals in the upper surface circumferential direction of the upper dispersion plate. An air classifier characterized by having an eddy current adjusting piece.
ッパー形をなした内外ケーシングから成る二重構造のケ
ーシング、該ケーシングの内ケーシングのほぼ軸心に垂
下し、上部に主羽根を有する回転可能な主軸、該主軸下
端に設けられた下部分散板および該下部分散板と間隔を
置いて設けられた上部分散板、主軸下端の下部分散板の
上に原料を供給するようケーシングの頂部に設けられた
原料投入口を備え、前記上部分散板の下面外周に陣笠状
の衝突板が設けられ、前記上部分散板の上面周方向に等
間隔に且つ上外方に傾斜した複数個の渦流調整片が設け
られると共に、該渦流調整片の上端部を取り囲むように
シール金物が設けられたことを特徴とする空気分級機。8. A casing having a double structure comprising an inner casing and an outer casing having a substantially cylindrical upper part and a substantially conical lower part in a hopper shape. The casing is suspended substantially at an axis of the inner casing of the casing, and a main blade is provided at an upper part. A rotatable main shaft, a lower dispersion plate provided at a lower end of the main shaft, an upper distribution plate provided at a distance from the lower dispersion plate, and a top portion of a casing for supplying raw materials onto the lower distribution plate at a lower end of the main shaft. A plurality of eddy currents which are provided at the outer periphery of a lower surface of the upper dispersion plate, and are provided with a fin-shaped collision plate, and which are inclined at equal intervals and upward and outward in the circumferential direction of the upper surface of the upper dispersion plate. An air classifier, wherein an adjusting piece is provided, and a seal metal is provided so as to surround an upper end portion of the eddy current adjusting piece.
ッパー形をなした内外ケーシングから成る二重構造のケ
ーシング、該ケーシングの内ケーシングのほぼ軸心に垂
下し、上部に主羽根を有する回転可能な主軸、該主軸下
端に設けられた下部分散板および該下部分散板と間隔を
置いて設けられた上部分散板、主軸下端の下部分散板の
上に原料を供給するようケーシングの頂部に設けられた
原料投入口を備えた空気分級機において、内ケーシング
の天井部に、上部分散板に等間隔に複数個設けた渦流調
整片の外側に補助用の二次ベーンが設けられたことを特
徴とする空気分級機。9. A casing having a double structure comprising an inner and outer casing having a hopper shape in which an upper part is substantially cylindrical and a lower part is substantially conical. The casing is suspended substantially at the axis of the inner casing, and a main blade is provided on the upper part. A rotatable main shaft, a lower dispersion plate provided at a lower end of the main shaft, an upper distribution plate provided at a distance from the lower dispersion plate, and a top portion of a casing for supplying raw materials onto the lower distribution plate at a lower end of the main shaft. In the air classifier with the raw material inlet provided in the above, auxiliary secondary vanes were provided on the ceiling of the inner casing, outside the vortex adjusting pieces provided at equal intervals on the upper dispersion plate. An air classifier characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63101402A JP2664061B2 (en) | 1988-04-26 | 1988-04-26 | Air classifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63101402A JP2664061B2 (en) | 1988-04-26 | 1988-04-26 | Air classifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01274881A JPH01274881A (en) | 1989-11-02 |
| JP2664061B2 true JP2664061B2 (en) | 1997-10-15 |
Family
ID=14299735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63101402A Expired - Lifetime JP2664061B2 (en) | 1988-04-26 | 1988-04-26 | Air classifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2664061B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5177610B2 (en) * | 2005-11-16 | 2013-04-03 | 宇部興産機械株式会社 | Cement clinker grinding equipment |
| JP4811713B2 (en) * | 2005-12-13 | 2011-11-09 | 宇部興産機械株式会社 | Cement clinker grinding equipment |
| CN113798182B (en) * | 2021-08-03 | 2023-07-14 | 唐山黑猫炭黑有限责任公司 | Carbon black separation impurity removal method and device |
-
1988
- 1988-04-26 JP JP63101402A patent/JP2664061B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01274881A (en) | 1989-11-02 |
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