JPS6031829Y2 - Vertical mill classification device - Google Patents
Vertical mill classification deviceInfo
- Publication number
- JPS6031829Y2 JPS6031829Y2 JP10773881U JP10773881U JPS6031829Y2 JP S6031829 Y2 JPS6031829 Y2 JP S6031829Y2 JP 10773881 U JP10773881 U JP 10773881U JP 10773881 U JP10773881 U JP 10773881U JP S6031829 Y2 JPS6031829 Y2 JP S6031829Y2
- Authority
- JP
- Japan
- Prior art keywords
- mill
- rotary
- classification
- casing
- guide vane
- 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.)
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Description
【考案の詳細な説明】
本考案は竪型ミルの分級装置に係り、特に粉砕物の分級
効率を大幅に向上でき、竪型ミルの運転コストを低減し
得る竪型ミルの分級装置に関する。[Detailed Description of the Invention] The present invention relates to a classification device for a vertical mill, and particularly to a classification device for a vertical mill that can significantly improve the classification efficiency of pulverized materials and reduce the operating cost of the vertical mill.
竪型ミルは、セメント原料、石炭、クリンカ等の被粉砕
物を粉状に粉砕する装置として用いられており、一般に
ミルケーシング内底部に設けられた粉砕部で粉砕された
粉砕物を熱ガス等の上昇気流により同伴移送し、移送さ
れてきた粉砕物をミルケーシング上部に設けられた分級
器で分級して粗粉を粉砕部に戻しつつ細粉をミルケーシ
ング外にガス流とともに搬出するように構成されている
。Vertical mills are used as devices to crush materials to be crushed, such as cement raw materials, coal, clinker, etc., into powder.Generally, the crushed materials are heated in a crushing section provided at the inner bottom of the mill casing using hot gas, etc. The pulverized material is transported along with the rising air current, and the transported pulverized material is classified by a classifier installed at the top of the mill casing, and the coarse powder is returned to the pulverizing section while the fine powder is carried out of the mill casing along with the gas flow. It is configured.
このように構成された竪型ミルにあっては、粉砕処理量
を増大し生産性の向上を図るべく、粉砕部上方には、こ
れより上昇気流によって吹き上げられた粉体が非常に高
濃度で存在している。In a vertical mill configured in this way, in order to increase the amount of pulverization and improve productivity, there is a very high concentration of powder blown up by the upward air flow above the pulverizing section. Existing.
従って１、従来のような一段分級の分級器では十分な分
級が行なえず、分級器で分級され粉砕部に戻される戻り
粉（粗粉）中には、精粉として回収すべき細粉乃至微粉
が未だ多量に含まれていた。Therefore, 1. A conventional one-stage classifier cannot perform sufficient classification, and the returned powder (coarse powder) that is classified by the classifier and returned to the crushing section contains fine powder or fine powder that should be recovered as refined powder. was still present in large amounts.
そのため、戻り粉中の細粉が再び粉砕部で不必要な過粉
砕をうけることとなりミル動力が無駄に浪費されると共
に、竪ミルより取り出すことのできる細粉量を増大させ
ることが困難であった。Therefore, the fine powder in the returned powder is subjected to unnecessary over-pulverization again in the crushing section, which wastes mill power, and it is difficult to increase the amount of fine powder that can be taken out from the vertical mill. Ta.
また、粉砕部と分級器との間を循環するだけの粉体の循
環量が多く、ミル内を負圧に吸引し分級された細粉をミ
ルケーシング外に搬出するための排風機に大きな動力を
必要とする等の問題があった。In addition, there is a large amount of powder circulating between the crushing section and the classifier, and a large amount of power is required for the exhaust fan that suctions the inside of the mill to negative pressure and carries the classified fine powder out of the mill casing. There were problems such as the need for
本考案は以上のような従来の竪型ミルの問題点を有効に
解決すべく創案されたものであり、本考案の目的は、粉
砕部で粉砕され上昇気流とともに移送される粉砕物を繰
返し分級しつつ分級された細粉をミルケーシング外に取
り出すように構成したことにより、粉砕物の分級効率を
大幅に向上でき細粉回収量を増大し得ると共に、竪型ミ
ルの運転コストを低減できる竪型ミルの分級装置を提供
することにある。The present invention was devised to effectively solve the problems of the conventional vertical mill as described above. By having a structure in which the classified fine powder is taken out of the mill casing, the classification efficiency of the pulverized material can be greatly improved, the amount of fine powder recovered can be increased, and the operating cost of the vertical mill can be reduced. The purpose of the present invention is to provide a type mill classification device.
以下に本考案の好適一実施例を添付図面に従って詳述す
る。A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
第１図において、１は筒体状のミルケーシングであり、
その下部には図示省略の粉砕部と熱ガス噴出口とが形成
されると共に、ミルケーシング１頂部には分級された細
粉Ｐ１をケーシング１外に導出するための導出管２が取
出口３に連設されており、導出管２に設けられた排風機
（図示せず）によりミルケーシング１内に負圧に吸引す
ると共に、熱ガス噴出口より熱ガスを吹き上げてケーシ
ング１内に上昇気流Ｆを形成して粉砕部で粉砕された粉
砕物Ｐを上昇気流Ｆとともにケーシング１上部に移送す
るように構成されている。In FIG. 1, 1 is a cylindrical mill casing;
A crushing part and a hot gas outlet (not shown) are formed in the lower part of the mill casing 1, and a discharge pipe 2 for guiding the classified fine powder P1 out of the casing 1 is connected to the outlet 3 at the top of the mill casing 1. The exhaust fan (not shown) provided in the outlet pipe 2 draws negative pressure into the mill casing 1, and blows hot gas up from the hot gas outlet to create an upward air flow F inside the casing 1. The pulverized material P that has been pulverized in the pulverizing section is transported to the upper part of the casing 1 along with an upward air flow F.
ミルケーシング１上部には、ケーシング１の上壁１ａを
貫通し垂下させて回転駆動軸４が設けられ、回転駆動軸
４の外側には、これに連結されて回転駆動して粉砕物を
分級するための回転羽根５、６． ７が、第１図乃至第
２図に示す如く、駆動軸４を囲繞するように上下に位置
させてそれぞれ設けられている。A rotary drive shaft 4 is provided at the upper part of the mill casing 1 so as to penetrate through the upper wall 1a of the casing 1 and hang down.A rotary drive shaft 4 is connected to the outside of the rotary drive shaft 4 and is rotatably driven to classify the pulverized material. Rotating blades 5, 6. 7 are provided above and below to surround the drive shaft 4, as shown in FIGS. 1 and 2.
回転羽根５． ６． ７は、回転駆動軸４下端に設けら
れた支持板８より上方に放射状に延出された支持フレー
ム９と回転羽根５゜６．７上端にそれぞれ設けられた環
状の固定板１２．１１．１０とにより支持固定されてい
る。Rotating blade 5. 6. Reference numeral 7 denotes a support frame 9 extending radially upward from a support plate 8 provided at the lower end of the rotary drive shaft 4, and an annular fixed plate 12, 11, and 10 provided at the upper end of the rotary blade 5°6.7, respectively. It is supported and fixed by.
また、土壁１ａ上には回転駆動軸４を駆動すべく原動機
１３が設けられており、更に、上壁１ａには回転駆動軸
４の回転を円滑にすべく、軸受１４が設けられ、ケーシ
ング１の上壁１ａの内側面には固定板１２より立設され
た環状のラビリンスシール用の取付板１６が取り付けら
れると共に、回転駆動軸４と取付板１６との間には支持
アーム１７が介設されている。Further, a prime mover 13 is provided on the earthen wall 1a to drive the rotary drive shaft 4, and a bearing 14 is further provided on the upper wall 1a to ensure smooth rotation of the rotary drive shaft 4. A mounting plate 16 for an annular labyrinth seal is attached to the inner surface of the upper wall 1a of the rotary drive shaft 12, and a support arm 17 is interposed between the rotary drive shaft 4 and the mounting plate 16. It is set up.
回転羽根５外側には、これらを囲むように、案内羽根１
８が複数設けられている。On the outside of the rotating blade 5, a guide blade 1 is arranged so as to surround them.
A plurality of 8 are provided.
案内羽根１８は、ミルケーシング１内周壁に沿って粉砕
物Ｐを伴って上昇する上昇気流Ｆの流れを整流しつつ回
転羽根５方向に適宜角度をもたせて供給し得るように回
動自在に設けられている。The guide vanes 18 are rotatably provided so as to rectify the flow of the updraft F rising along the inner circumferential wall of the mill casing 1 with the pulverized material P, while supplying it at an appropriate angle in the direction of the rotary vanes 5. It is being
案内羽根１８下方には、回転羽根６．７を囲繞する筒体
１９が設けられている。A cylindrical body 19 surrounding the rotary vane 6.7 is provided below the guide vane 18.
筒体１９内周壁に沿っては、筒体１９内に分級用ガスＧ
を供給する環状ダクト２０．２１が配設され、環状ダク
ト２０内周壁には回転羽根６に臨ませて案内羽根２２が
、また環状ダクト２１内周壁には回転羽根７に臨ませて
案内羽根２３がそれぞれ複数設けられている。Along the inner peripheral wall of the cylindrical body 19, a classification gas G is placed inside the cylindrical body 19.
An annular duct 20, 21 is provided, and a guide vane 22 is provided on the inner peripheral wall of the annular duct 20 facing the rotary vane 6, and a guide vane 23 is provided on the inner peripheral wall of the annular duct 21 facing the rotary vane 7. There are several of each.
環状ダクト２０にはこれらに分級用ガスＧを供給すべく
供給管２４．２５が、また環状ダクト２１には供給管２
６．２７（供給管２７は図示せず）がケーシング１を貫
通させてそれぞれ接続配管されている。The annular duct 20 has supply pipes 24 and 25 for supplying the classification gas G thereto, and the annular duct 21 has a supply pipe 2
6.27 (the supply pipe 27 is not shown) are connected to each other through the casing 1.
また、筒体１９下方には、環状ダクト２０，２１から供
給される分級用ガス流や回転羽根５゜６．７の回転等に
より分級されて流下してきた粗粉Ｐ２を再び粉砕部に戻
すべく、ホッパ２８が設けられている。Further, below the cylindrical body 19, the coarse powder P2 that has been classified and flowed down by the classification gas flow supplied from the annular ducts 20 and 21 and the rotation of the rotary blade 5°6.7 is returned to the crushing section again. , a hopper 28 are provided.
ホッパ２８内には、ホッパ２８下端の排出口２８ａから
筒体１９内に粉砕部からの上昇気流が侵入しないように
、排出口２８ａ上方には円錐状のヘッド２９と、ヘッド
２９底面周縁部より回転自在に懸垂支持されたダストベ
ーン３０とが設けられている。Inside the hopper 28, a conical head 29 is provided above the discharge port 28a, and a conical head 29 is provided from the bottom peripheral edge of the head 29 to prevent the rising airflow from the crushing section from entering the cylinder 19 from the discharge port 28a at the lower end of the hopper 28. A rotatably suspended dust vane 30 is provided.
次に本実施例の作用について述でる。Next, the operation of this embodiment will be described.
導出管２に設けられた排風機の作動によりミルケーシン
グ１内に負圧に吸引されると共に、ケーシング１下部に
設けられた熱ガス噴出口より熱ガスが噴出されケーシン
グ１内には熱ガスによる上昇気流Ｆが形成される。Negative pressure is drawn into the mill casing 1 by the operation of the exhaust fan provided in the outlet pipe 2, and hot gas is ejected from the hot gas outlet provided at the bottom of the casing 1, so that the inside of the casing 1 is filled with hot gas. An updraft F is formed.
粉砕部で粉砕された粉砕物Ｐは、この上昇気流Ｆに同伴
され乾燥されつつケーシング１内を上昇する。The pulverized material P pulverized in the pulverizing section is accompanied by this upward airflow F and rises inside the casing 1 while being dried.
ケーシング１上部に移送されてきた粉砕物Ｐを伴う上昇
気流Ｆは案内羽根１８により整流され、回転羽根５と案
内羽根１８との間に形成される１次分級室Ｒ１に流入す
る。The rising air flow F accompanied by the crushed material P transferred to the upper part of the casing 1 is rectified by the guide vane 18 and flows into the primary classification chamber R1 formed between the rotary vane 5 and the guide vane 18.
一方、原動機１３の作動により、回転駆動軸４は回転し
、支持フレーム９を介して回転羽根５゜６．７が回転駆
動される。On the other hand, due to the operation of the prime mover 13, the rotary drive shaft 4 rotates, and the rotary blades 5°6.7 are rotationally driven via the support frame 9.
１次分級室Ｒ１に流入してきた粉砕物Ｐは、排風機の吸
引によりミルケ−ソング１中心部に向う向心力と、回転
羽根５の回転により遠心力とを受けて分級されることに
なる。The pulverized material P flowing into the primary classification chamber R1 is classified by being subjected to centripetal force directed toward the center of the Milky Song 1 due to suction from the exhaust fan and centrifugal force due to the rotation of the rotary blades 5.
粉砕物Ｐ中の細粉Ｐ１には吸引による向心力が遠心力に
打ち勝ち、細粉Ｐ□は、回転羽根５を通過し、ケーシン
グ１中央部へと流入し回転駆動軸４に沿って上昇し取出
口３から導出管２へと搬出される。The centripetal force due to suction overcomes the centrifugal force on the fine powder P1 in the pulverized material P, and the fine powder P□ passes through the rotating blade 5, flows into the center of the casing 1, rises along the rotational drive shaft 4, and is removed. It is carried out from the outlet 3 to the outlet pipe 2.
他方、粉砕物Ｐ中の粗粉Ｐ２には、吸引力よりも遠心力
が大きく作用し、回転羽根５外方へと飛はされるが、案
内羽根１８があるので、粗粉Ｐ２が１次分級室Ｒ１外に
出ることなく、回転羽根６．７と案内羽根２２．２３と
の間に形成される２次分級室Ｒ２へと流下する。On the other hand, the centrifugal force acts on the coarse powder P2 in the pulverized material P, which is stronger than the suction force, and it is thrown outward by the rotary blade 5, but since there is a guide blade 18, the coarse powder P2 is Without exiting the classification chamber R1, it flows down into the secondary classification chamber R2 formed between the rotary vane 6.7 and the guide vane 22.23.
このように案内羽根１８を設けたため、回転羽根５によ
りその外方へと飛ばされた粗粉Ｐ２が１次分級室Ｒ１人
口において、流入してくる粉砕物Ｐと衝突したり、粗粉
Ｐ２が１次分級室Ｒ１への出入を繰り返したりすること
により１次分級室Ｒ１人日付近の粉塵濃度が高くなるの
を防ぐことができ、分級効率が向上する。Since the guide vanes 18 are provided in this way, the coarse powder P2 blown outward by the rotary vanes 5 collides with the inflowing pulverized material P in the primary classification chamber R1, and the coarse powder P2 By repeatedly going in and out of the primary classification room R1, it is possible to prevent the dust concentration near the primary classification room R1 from increasing, thereby improving the classification efficiency.
次に、１次分級室Ｒ１から２次分級室Ｒ２に流下してき
た粗粉Ｐ２は２次分級室Ｒ２を降下する際に、供給管２
４．２５から環状ダクト２０内に供給され案内羽根２２
により２次分級室Ｒ２内に整流して導入される分級用ガ
スＧ及び供給管２６゜２７から環状ダクト２１内に供給
され案内羽根２３により整流されて２次分級室Ｒ２内に
導入される分級用ガスＧの流体力と、回転羽根６，７に
よる遠心力とで、更に分級作用を受ける。Next, the coarse powder P2 that has flowed down from the primary classification chamber R1 to the secondary classification chamber R2 is transferred to the supply pipe 2 as it descends through the secondary classification chamber R2.
4. The guide vane 22 is supplied from 25 into the annular duct 20.
The classification gas G is rectified and introduced into the secondary classification chamber R2 by the gas G, and the classification gas G is supplied into the annular duct 21 from the supply pipe 26, 27, rectified by the guide vane 23, and introduced into the secondary classification chamber R2. The fluid force of the gas G and the centrifugal force caused by the rotating blades 6 and 7 further classify the gas.
そして、粗粉Ｐ２に随伴して降下してきた細粉Ｐ１は、
分級されミルケーシング１中央部へと吸引され導出管２
から搬出され、粗粉Ｐ２は案内羽根２２．２３に沿って
下降し、ホッパ２８へと流下する。Then, the fine powder P1 that has descended along with the coarse powder P2 is
It is classified and sucked into the center of the mill casing 1 and the outlet pipe 2
The coarse powder P2 descends along the guide vanes 22, 23 and flows down into the hopper 28.
２次分級室Ｒ２て分級された粗粉Ｐ２は自重により降下
し、ホッパ２８内周壁とダストベーン３０との間に堆積
される。The coarse powder P2 classified in the secondary classification chamber R2 descends due to its own weight and is deposited between the inner circumferential wall of the hopper 28 and the dust vane 30.
所定量が堆積されるとその重量でダストベーンン３０が
回動し、粗粉Ｐ２が再び粉砕部へと投下供給される。When a predetermined amount is deposited, the dust vane 30 rotates due to its weight, and the coarse powder P2 is dropped and supplied to the crushing section again.
この際、ホッパ２８より投下される粗粉Ｐ２はケーシン
グ１中央を降下するため、ケーシング１側壁に沿って上
昇する熱ガス流によって吹き上げられることなく粉砕部
に戻されて再度粉砕されることとなる。At this time, the coarse powder P2 dropped from the hopper 28 descends through the center of the casing 1, so it is not blown up by the hot gas flow rising along the side wall of the casing 1, and is returned to the crushing section to be crushed again. .
以上の説明より明らかなように本考案によれば次のよう
な優れた効果を発揮する。As is clear from the above explanation, the present invention exhibits the following excellent effects.
（１）粉砕物に繰返し分級作用を与えることにより１段
分級後の粗粉中に多量に含まれている細粉を回収するこ
とができ、分級効率と細分回収量とを大幅に増大し得、
竪型ミルの細粉の生産量を推進できる。(1) By repeatedly applying a classification action to the pulverized material, it is possible to recover a large amount of fine powder contained in the coarse powder after the first stage classification, and the classification efficiency and the amount of finely divided particles recovered can be greatly increased. ,
It can promote the production of fine powder in vertical mills.
（２）ミルケーシング内を粉砕部と分級装置との間を循
環するだけの粉体循環量を減少でき、排風機動力が軽減
され、更に細粉が粉砕部で過粉砕を受けてミル動力が浪
費されることがなく、竪型ミルの運転コストを低減する
ことができる。(2) The amount of powder circulating in the mill casing between the crushing section and the classifier can be reduced, reducing the power of the exhaust fan, and further reducing the mill power as the fine powder is over-pulverized in the crushing section. There is no waste, and the operating cost of the vertical mill can be reduced.
（３）竪型ミル内上部に分級装置を設けているため、分
級装置の据付スペースを別途に確保する必要がなく、構
造も簡単で極めて実用性に富む。(3) Since the classification device is installed in the upper part of the vertical mill, there is no need to secure a separate installation space for the classification device, and the structure is simple and extremely practical.
第１図は本考案に係る分級装置の一実施例を示す縦断面
図、第２図は第１図の■−■線矢視概略断面図である。
図中、１はミルケーシング、３は取出口、４は回転駆動
軸、５，６．７は回転羽根、１８は第１の案内羽根、１
９は筒体、２０．２１は環状ダクト、２２．２３は第２
の案内羽根、Ｐは粉砕物、Ｆは上昇気流、Ｐ、は細粉、
Ｐ２は粗粉である。FIG. 1 is a longitudinal cross-sectional view showing an embodiment of a classification device according to the present invention, and FIG. 2 is a schematic cross-sectional view taken along the line ■-■ in FIG. In the figure, 1 is a mill casing, 3 is an outlet, 4 is a rotary drive shaft, 5, 6.7 are rotary vanes, 18 is a first guide vane, 1
9 is a cylinder, 20.21 is an annular duct, 22.23 is a second
guide vane, P is pulverized material, F is updraft, P is fine powder,
P2 is coarse powder.
Claims (1)
粉砕物を上昇気流とともに移送腰移送される粉砕物を分
級しつつ分級された細粉をミルケーシングの頂部に設け
られた取出口より取り出すようにした竪型ミルの分級装
置において、上記ミルケーシングの頂部より垂下された
回転駆動軸に連結されその外側を囲繞するように設けら
れた回転羽根と、該回転羽根の上部外側に臨ませ、上記
粉砕物を同伴移送する上昇気流を回転羽根方向に整流す
る第１の案内羽根と、該第１の案内羽根の下方に設けら
れた筒体の内周壁に沿って形成され筒体内に分級用ガス
を供給する環状夕゛クトと、該ダクト内周面に設けられ
環状ダクトの分級用ガスを上記回転羽根下部側に整流し
て供給する第２の案内羽根とを備えたことを特徴とする
竪型ミルの分級装置。The pulverized material is transported by the pulverizing section provided at the bottom of the mill casing, and the pulverized material is classified and the classified fine powder is taken out from the outlet provided at the top of the mill casing. In the classification device for a vertical mill, the rotary blade is connected to the rotary drive shaft hanging from the top of the mill casing and is provided so as to surround the outside of the rotary blade, and the above-mentioned A first guide vane rectifies the rising airflow that entrains and transports the crushed material in the direction of the rotary vanes, and a classifying gas is formed along the inner circumferential wall of the cylinder provided below the first guide vane. and a second guide vane provided on the inner peripheral surface of the duct to rectify and supply the classification gas of the annular duct to the lower side of the rotary vane. Type mill classification equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10773881U JPS6031829Y2 (en) | 1981-07-22 | 1981-07-22 | Vertical mill classification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10773881U JPS6031829Y2 (en) | 1981-07-22 | 1981-07-22 | Vertical mill classification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5814983U JPS5814983U (en) | 1983-01-29 |
| JPS6031829Y2 true JPS6031829Y2 (en) | 1985-09-24 |
Family
ID=29902166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10773881U Expired JPS6031829Y2 (en) | 1981-07-22 | 1981-07-22 | Vertical mill classification device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6031829Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0824837B2 (en) * | 1987-01-07 | 1996-03-13 | オルガノ株式会社 | Pneumatic automatic chemical solution metering device |
| JPS63171634A (en) * | 1987-09-30 | 1988-07-15 | Japan Organo Co Ltd | Liquid chemicals bottle for quatitative feeder of liquid chemicals |
-
1981
- 1981-07-22 JP JP10773881U patent/JPS6031829Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5814983U (en) | 1983-01-29 |
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