JP4035837B2

JP4035837B2 - Media circulation mill

Info

Publication number: JP4035837B2
Application number: JP2001315034A
Authority: JP
Inventors: 政憲井上
Original assignee: Inoue Mfg Inc
Current assignee: Inoue Mfg Inc
Priority date: 2001-10-12
Filing date: 2001-10-12
Publication date: 2008-01-23
Anticipated expiration: 2021-10-12
Also published as: JP2003117371A

Description

【０００１】
【発明の属する技術分野】
本発明は、固体粒子が液体中に懸濁している固液スラリ−溶液等の処理材料を液送ラインで移送中に予備分散するようにしたパイプラインビ−ズミルや分散媒体を循環させてバッチ式に分散処理できるようにした浸漬型分散機等の媒体循環型ミルに関するものである。
【０００２】
【従来の技術】
固液スラリ−溶液等の処理材料を湿式媒体分散機等の分散機で分散処理する際、該分散機に処理材料を供給する前に、処理材料を攪拌する前処理（プレミックス）が行われているが、この前処理だけで固体（粉体）の一次粒子化は不可能であり、多くの二次凝集体がパイプライン内に沈殿することが知られている。そこで、本願出願人は、先に、固液スラリ−溶液等の処理材料を分散処理する場合、液送ラインを処理材料が通過する間に二次凝集体をほぐして予備分散できるようにした下記の如き構成のパイプラインビ−ズミルを提案した。
【０００３】
処理材料を送液する配管に接続される材料供給口を一側に有し他側に上記送液配管の他端に接続される材料吐出口を有する分散室を形成し、上記分散室に上記材料供給口側に開口する筒状の外周ステ−タ−と該外周ステ−タ−の内方に存し上記材料吐出口側に開口する内周ステ−タ−を設け、両ステ−タ−間に処理間隙を形成し、該処理間隙内を外側間隙と内側間隙に区画するよう筒状のロ−タ−を上記処理間隙に挿入すると共に該ロ−タ−を回転する駆動軸を設け、上記処理間隙に分散媒体を収納し、上記ロ−タ−の回転に伴って上記分散媒体が上記外側間隙を通り内側間隙に流れ上記外側間隙に還流するよう上記ロ−タ−に循環口を形成し、上記内周ステ−タ−に処理材料を上記吐出口へ流出する流出口を形成し、該流出口に分散媒体を処理材料から分離するスクリ−ンを設けたパイプラインビ−ズミル。
【０００４】
上記パイプラインビ−ズミルにおいて、外周ステ−タ−と内周ステ−タ−により形成した処理間隙に供給された処理材料は、該処理間隙内で分散媒体（ビ−ズ）と混合され、ロ−タ−の回転により外周ステ−タ−の内側面とロ−タ−の外側面間に形成された外側間隙から該ロ−タ−の内側面と内周ステ−タ−の外側面間に形成された内側間隙に入り、遠心力作用によりロ−タ−に形成した循環口を通って外側間隙に戻り、該外側間隙と内側間隙を循環して流動する間に上記分散媒体により微粒子化される。
【０００５】
上記パイプラインビ−ズミルによれば、前処理された処理材料の二次凝集体の解砕に有効であることが確認され、簡単な微粒子化をする場合には、繰り返して上記パイプラインビ−ズミルを通過させることにより、所望の分散結果が得られることも認められた。また、上記パイプラインビ−ズミルの分散室とほぼ同様の構成は、バッチ式に分散処理を行うようにした特開２００１−３８１８４号公報に記載の浸漬型分散機にも用いられており、バッチ式でも効率よく分散処理することができる。
【０００６】
上記パイプラインビ−ズミルや上記浸漬型分散機等の媒体循環型ミルは、上述のように効率よく分散処理等を行うことができるが、処理材料の種類や性状によっては、内側間隙に入った処理材料がロ−タ−の内側面に付着し、さらにはこの付着面に分散媒体（ビ−ズ）が入り込んだりして処理能力を低下させたり、洗浄の際に簡単に除去できなくなるという問題を生じることがあった。
【０００７】
【発明が解決しようとする課題】
本発明の解決課題は、上記のような媒体循環型ミルにおいて、ロ−タ−の内側面に処理材料が付着しないようにし、上記洗浄等の問題を生じないようにした媒体循環型ミルを提供することである。
【０００８】
【課題を解決するための手段】
本発明によれば、上記のようなロ−タ−の内側面に処理材料が付着しないようにするため、ロ−タ−の内側面に沿って流れる処理材料の流動を変化させ若しくはロ−タ−の内側面に沿って流動する処理材料に圧縮、解放を繰り返すことにより流れを乱流状態にしてロ−タ−の内側面に処理材料が付着しないようにした媒体循環型ミルが提供される。
【０００９】
すなわち、本発明によれば、処理材料の供給口と吐出口を有する分散室に筒状の外周ステ−タ−とその内方に位置する筒状の内周ステ−タ−を設けて処理材料が流入する環状の処理間隙を形成し、該処理間隙内を外側間隙と内側間隙に区画するよう回転可能なロ−タ−を該処理間隙に挿入し、該ロ−タ−の回転により上記処理材料が上記処理間隙内で分散媒体と共に上記外側間隙を通り上記内側間隙に流れ該外側間隙に還流するよう上記ロ−タ−に循環口を形成し、上記内周ステ−タ−に上記分散媒体を分離して処理材料のみを吐出口へ吐出させるよう媒体分離装置を設けた媒体循環型ミルにおいて、上記内周ステ−タ−の外側面に上記ロ−タ−の内側面に近接し該ロ−タ−の軸方向に沿って延びる突片を突設したことを特徴とする媒体循環型ミルが提供され、上記突片によりロ−タ−の内側面に沿って流動する処理材料の流れが変化し、処理材料が該内側面に付着しないようにでき、上記課題が解決される。
【００１０】
また、本発明によれば、上記処理材料の供給口と吐出口を有する分散室に筒状の外周ステ−タ−とその内方に位置する筒状の内周ステ−タ−を設けて処理材料が流入する環状の処理間隙を形成し、該処理間隙内を外側間隙と内側間隙に区画するよう回転可能なロ−タ−を該処理間隙に挿入し、該ロ−タ−の回転により上記処理材料が上記処理間隙内で分散媒体と共に上記外側間隙を通り上記内側間隙に流れ該外側間隙に還流するよう上記ロ−タ−に循環口を形成し、上記内周ステ−タ−に上記分散媒体を分離して処理材料のみを吐出口へ吐出させるよう媒体分離装置を設けた媒体循環型ミルにおいて、上記ロ−タ−の内側の横断面形状を四角形、六角形等の多角形、長円乃至略楕円形状または中心を上記内周ステーターの中心からずらした偏心円形状に形成したことを特徴とする媒体循環型ミルが提供され、上記ロ−タ−が回転すると内側の横断面形状が上記の如き断面形状に形成されているので処理材料は圧縮されたり、解放されたりし、該ロ−タ−の内側面に付着しないようになり、上記課題を解決することができる。
【００１１】
【発明の実施の形態】
本発明は、上述したように送液ラインの途中に設けるパイプラインビ−ズミルや、バッチ式に分散処理できるようにした浸漬型分散機等の媒体循環型ミルに適用することができるが、図に示す実施例では、固液スラリ−溶液等の処理材料を送液する配管（Ｌ）の途中に分散室（１）を設けて二次凝集体を解砕するようにしたパイプラインビ−ズミルに適用した実施例が示されている。
【００１２】
上記分散室（１）を形成する本体（２）は、一側に上流側の上記配管（Ｌ）に接続される材料供給口（３）を有し、他端に下流側の配管（Ｌ）に接続される材料吐出口（４）が形成される。該本体（２）は、入口側部材（５）と中間部材（６）と吐出側部材（７）をそれぞれボルト（８）…で連結して構成されており、上記入口側部材（５）には上記材料供給口（３）、流入室（９）及びガラスビ−ズ、セラミックスビ−ズその他の分散媒体（ビ−ズ）(10)の投入口(11)が形成され、軸シ−ル部(12)及び蓋板(13)を通して図示を省いたモ−タ−で駆動される駆動軸(14)が本体内に延びている。
【００１３】
上記駆動軸(14)には、上記流入室（９）に入った処理材料の流動に、中間部材（６）を通って材料吐出口側へ向う軸流を生じさせるよう軸流翼(15)が設けられている。該軸流翼(15)としては、図に示すように流入室に入った処理材料を中間部材（６）側へ掻き下げる作用を奏する掻下げ羽根を用いることが好ましいが、軸流プロペラ等を用いることもできる。
【００１４】
上記中間部材（６）には、中心に向かって内方に突出し逆円錐状に下方に傾斜する流入口(16)を形成するための内方突出縁(17)及び外周ステ−タ−(18)が設けられ、また上記吐出側部材（７）には上記材料吐出口（４）に通じる流出口（図示略）を有する内周ステ−タ−(19)が設けられている。該外周ステ−タ−(18)及び内周ステ−タ−(19)は、それぞれ筒状に形成され、材料供給口側に開口する外周ステ−タ−(18)の内方に材料吐出口側に開口する内周ステ−タ−(19)が設けられ、両ステ−タ−間に環状で有底の処理間隙(20)が形成されている。なお、該処理間隙(20)には上記分散媒体(10)…が収納される。
【００１５】
上記処理間隙(20)には、該処理間隙内を外側間隙(21)と内側間隙(22)に区画し先端側で外側間隙(21)と内側間隙(22)を連通するよう筒状のロ−タ−(23)が処理間隙の開口側から挿入されている。該ロ−タ−(23)は、上記駆動軸(14)の下端に取付けられる略截頭円錐状のロ−タ−端面部(24)と該ロ−タ−端面部(24)に連結された筒状のロ−タ−本体(25)を有し、上記駆動軸により上記処理間隙(20)内で回転する。なお、上記処理間隙(20)の幅、特に外側間隙(21)の幅は、通常のアニュラ−タイプの媒体分散機と同程度に形成され、上記分散媒体によるずり力を効率よく処理材料に作用できる幅にされている。
【００１６】
上記ロ−タ−(23)が回転した際、上記処理材料及び分散媒体(10)…は、上記ロ−タ−によって処理間隙(20)内で流動するが、このとき外側間隙(21)を通り内側間隙(22)に流れた分散媒体が該内側間隙(22)から上記外側間隙(21)に還流するよう上記ロ−タ−(23)には循環口(26)が形成されている。
【００１７】
なお、上記内周ステ−タ−(19)の流出口には、分散媒体(10)…を処理材料から分離するよう小孔、スリット、網目等の流通孔を有する媒体分離装置(27)が形成されている。図においては、説明上、網体で筒状に形成したスクリ−ンを図示しているが、流出口にスクリ−ンを取り付けるようにしたり、その他の適宜の媒体分離構造に形成することができる。また上記ロ−タ−のロ−タ−端面部の内面下部と上端に流出口を設けた内周ステ−タ−を組み合せ、両部材間に分散媒体の通過を阻止する程度のギャップを形成し、いわゆるギャップセパレ−タ−を構成するようにしてもよい（図示略）。
【００１８】
上記処理間隙(20)には、約６０〜９０％程度の分散媒体(10)…が充填され、上流側の配管（Ｌ）から上記材料供給口（３）を通って分散室内に送られた処理材料は、上記分散室（１）の流入口(16)から処理間隙(20)の外側間隙(21)へ入り、内側間隙(22)へ流動する。この間に、ロ−タ−(23)により運動を与えられた分散媒体(10)は、該分散媒体間に生じる衝撃力、摩砕力によって処理材料中の二次凝集体をほぐしたり固体粒子を微粒子化し、処理材料は予備分散され、この予備分散された処理材料のみがスクリ−ン等の媒体分離装置(27)を通って上記材料吐出口（４）から下流側の配管（Ｌ）へ流れる。なお、分散室の周囲やロ−タ−等の適宜の部位にジャケットを設けて調温するようにしてもよい。
【００１９】
浸漬型分散機の場合は、上記入口側部材（５）を除去し、タンク内に収納した処理材料中に分散室を浸漬し、上記流入口(16)を供給口として処理材料が直接分散室内に流入するようにし、上記処理を行った後、タンク内に流出した処理材料を再び上記流入口から分散室内に循環させて上記処理を繰り返し、所望の分散処理を行うように構成すればよい。
【００２０】
而して、図１に示すように、上記ロ−タ−（２３）は、内周ステ−タ−（１９）と同芯に設けられ、内側の横断面形状は円形に形成されているが、上記内周ステ−タ−（１９）の外側面には、上記ロ−タ−（２３）の内側面に近接し、該ロ−タ−（２３）の中心軸に沿って延びる突片（２８）が突設されている。該突片（２８）は、図２（Ａ），（Ｂ）に示すように断面三角形状、四角形状等の多角形状にしたり、同図（Ｃ）に示すように円形、楕円形等の外周が曲面に形成された断面形状を有する棒状体に作られ、支持板（２９）に取り付けられている。多角形状にする場合、処理材料がロ−タ−の内側面に対して斜めに流動するように角部（３０）を流れに対向させるようにしてある（図２（Ａ））が、図２（Ｂ）に示すように乱流を生じさせるよう平面（３１）を流れに対向させるようにしたり、図２（Ｄ）に示すように背面側に補助部材（３２）を設けてもよい。
【００２１】
上記突片(28)の長さは、ロ−タ−(23)の内側面の軸方向長さ以内の適宜の長さとし、該突片(28)とロ−タ−(23)の内側面間の間隙は、ロ−タ−の回転に支障を与えないよう使用分散媒体の粒径（ビ−ズ径）の少なくとも約４倍程度とすることが好ましい。
【００２２】
上記構成により、ロ−タ−(23)が回転した際、該ロ−タ−の内側面に沿って流動する処理材料は、上記突片(28)の部分で抵抗を受けて流動が変化し、ロ−タ−の内側面への付着が阻止される。
【００２３】
図３は、他の実施例を示し、基本的な構成は、図１に示す実施例と同じであるが、ロ−タ−(23)の内側面の断面形状が相違している。すなわち、該ロ−タ−の内側面は、ロ−タ−が回転した際、処理材料を圧縮したり、解放したりできるよう内周ステ−タ−(19)の外側面とロ−タ−内側面の間隔が周方向に変化する異型断面形状に形成されている。異型断面形状としては、例えば図４（Ａ),（Ｂ）に示すように四角形(33)、六角形(34)等の多角形状や、図４（Ｃ）の如き、長円(35)乃至略楕円にしたり、図４（Ｄ）のようにロ−タ−の内側面の円形の中心を内周ステ−タ−(19)の中心からずらした偏心円(36)とすることができる。
【００２４】
上記の構成により、ロ−タ−(23)が回転すると、上記内周ステ−タ−(19)の外側面とロ−タ−(23)の内側面間の間隔が広い部分(37)では、処理材料は解放され、狭い部分(38)では圧縮され、この解放と圧縮が繰り返して行われることにより、処理材料をロ−タ−(23)の内側面に付着しないようにすることができる。なお、上記実施例に示す如き突片を併用するようにしてもよい。
【００２５】
実験によれば、ロ−タ−（２３）の内側の横断面形状を六角形に形成すると、内周ステ−タ−（１９）に設けるスクリ−ン等の媒体分離装置の径を大きくとれ、吐出流量を増大することができ、また圧縮、解放の回数も多くなり、ロ−タ−内側面への処理材料の付着も確実に防ぐことができた。
【００２６】
上記ロ−タ−（２３）に形成する循環口（２６）は、ロ−タ−（２３）の軸径方向に沿って図４に示すように放射状に開口させてもよいが、図２（Ａ）や図５に示すようにロ−タ−（２３）の回転方向、矢印（３９）に対して後向きに傾斜する開口を設けて循環口（２６ａ）とすると、処理材料や分散媒体の流動が円滑に行われ、好ましい結果が得られる。特に、図５に示すように、ロ−タ−（２３）の内側の横断面形状を断面多角形状に形成したときは、その多角形の辺の延長線上（接線方向）に後向きに傾斜して開口する循環口（２６ｂ）を設けるとよい。そのようにすると、上記処理材料や分散媒体は、圧縮が解放されたところでロ−タ−の内側面に沿って接線方向に少ない抵抗でロ−タ−の外側面側（外側間隙）へ流出し、そのような流動が繰り返され、ロ−タ−内側面への処理材料の付着が一層防止される。
【００２７】
【発明の効果】
本発明は上記のように構成され、外周ステ−タ−と内周ステ−タ−間に環状の処理間隙を形成し、該処理間隙にロ−タ−を挿入して該処理間隙を外側間隙と内側間隙に区画し、該ロ−タ−の回転により処理材料と分散媒体を上記外側間隙と内側間隙をめぐって循環させ分散処理するようにした媒体循環型ミルにおいて、上記内周ステ−タ−の外側面に上記ロ−タ−の内側面に近接し該ロ−タ−の軸方向に沿って延びる突片を突設したので、上記ロ−タ−の内側面に沿って流動する処理材料の流れを変化させて該ロ−タ−の内側面に処理材料が付着しないようにすることができる。
【００２８】
また、上記の如き媒体循環型ミルにおいて、上記ロ−タ−の内側面の断面形状を四角形、六角形等の多角形、長円、略楕円、偏心円その他の異型断面形状に形成したので、上記ロ−タ−が回転すると内周ステ−タ−の外側面とロ−タ−の内側面の間隔が周方向で広狭に変化し、狭い部分で処理材料は圧縮され、広い部分で解放され、圧縮、解放を繰り返すことにより処理材料の流動に変化を与えてロ−タ−内側面への処理材料の付着を防止することができる。
【００２９】
以上のように、本発明によれば、処理材料がロ−タ−内側面へ付着しないようにでき、分散効率を高め、かつ洗浄作業を容易に行うことができる。
【図面の簡単な説明】
【図１】本発明の一実施例を示す断面図。
【図２】内周ステ−タ−を平面からみた説明図で、（Ａ）はロ−タ−を含めた説明図、（Ｂ）〜（Ｄ）は他の実施例を示す説明図。
【図３】本発明の他の実施例を示す一部の断面図。
【図４】ローターの内側の横断面形状を示す説明図であって、（Ａ）は四角形、（Ｂ）は六角形、（Ｃ）は長円、（Ｄ）は偏心円を示す各説明図。
【図５】ローターの内側の横断面形状を六角形状にした他の実施例の説明図。
【符号の説明】
１分散室２本体 18 外周ステ−タ− 19 内周ステ−タ−
20 処理間隙 21 外側間隙 22 内側間隙 23 ロ−タ−
26 循環口 28 突片 33 四角形 34 六角形 35 長円
36 偏心円[0001]
BACKGROUND OF THE INVENTION
The present invention provides a batch process by circulating a pipeline bead mill or a dispersion medium in which a processing material such as a solid-liquid slurry solution in which solid particles are suspended in a liquid is preliminarily dispersed during transfer in a liquid feed line. The present invention relates to a medium circulation type mill such as an immersion type disperser which can be dispersed in a formula.
[0002]
[Prior art]
When a processing material such as a solid-liquid slurry solution is dispersed by a dispersing machine such as a wet medium dispersing machine, a pretreatment (premix) for stirring the processing material is performed before the processing material is supplied to the dispersing machine. However, it is known that the primary particles of the solid (powder) cannot be formed by this pretreatment alone, and many secondary aggregates are precipitated in the pipeline. Therefore, the applicant of the present application previously made it possible to preliminarily disperse the secondary agglomerates while the processing material passes through the liquid feed line when the processing material such as the solid-liquid slurry solution is dispersed. A pipeline bead mill with the following structure was proposed.
[0003]
A dispersion chamber having a material discharge port connected to the other end of the liquid supply pipe on one side and a material supply port connected to a pipe for feeding the processing material on the other side is formed, and the dispersion chamber has the above A cylindrical outer peripheral stator that opens to the material supply port side and an inner peripheral stator that opens inside the outer peripheral stator and opens to the material discharge port side are provided. A processing gap is formed between them, a cylindrical rotor is inserted into the processing gap so as to divide the processing gap into an outer gap and an inner gap, and a drive shaft for rotating the rotor is provided. A dispersion medium is accommodated in the processing gap, and a circulation port is formed in the rotor so that the dispersion medium flows through the outer gap to the inner gap and returns to the outer gap as the rotor rotates. And forming an outflow port through which the processing material flows out to the discharge port in the inner peripheral stator, and a dispersion medium is formed in the outflow port. Subscription separated from physical material - pipeline bi provided down - Zumiru.
[0004]
In the pipeline bead mill, the processing material supplied to the processing gap formed by the outer peripheral stirrer and the inner peripheral stator is mixed with a dispersion medium (bead) in the processing gap, and -Between the inner side surface of the rotor and the outer side surface of the inner circumference stator from the outer gap formed between the inner side surface of the outer circumference stator and the outer side surface of the rotor by rotation of the rotor. It enters the formed inner gap, returns to the outer gap through the circulation port formed in the rotor by the action of centrifugal force, and is pulverized by the dispersion medium while circulating and flowing through the outer gap and the inner gap. The
[0005]
According to the pipeline bead mill, it has been confirmed that it is effective for crushing the secondary aggregates of the pretreated treatment material. It has also been observed that the desired dispersion results can be obtained by passing through a mill. Further, the configuration almost the same as the dispersion chamber of the above-mentioned pipeline bead mill is also used in the immersion type disperser described in JP-A-2001-38184 in which the dispersion treatment is performed in a batch manner. Even an expression can be distributed efficiently.
[0006]
Medium circulation type mills such as the above-mentioned pipeline bead mill and the above-mentioned immersion type disperser can efficiently carry out dispersion processing as described above, but depending on the type and properties of the processing material, they entered the inner gap. The problem is that the processing material adheres to the inner surface of the rotor, and further, the dispersion medium (beads) enters the adhering surface to reduce the processing capacity, and cannot be easily removed during cleaning. May occur.
[0007]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to provide a medium circulation type mill that prevents the processing material from adhering to the inner surface of the rotor so as not to cause problems such as cleaning in the medium circulation type mill as described above. It is to be.
[0008]
[Means for Solving the Problems]
According to the present invention, in order to prevent the processing material from adhering to the inner surface of the rotor as described above, the flow of the processing material flowing along the inner surface of the rotor is changed or the rotor is rotated. A medium circulation mill is provided in which the processing material flowing along the inner surface of the rotor is repeatedly compressed and released to make the flow turbulent so that the processing material does not adhere to the inner surface of the rotor. .
[0009]
That is, according to the present invention, a processing material is provided by providing a cylindrical outer peripheral stator and a cylindrical inner peripheral stator positioned inside the dispersion chamber having a processing material supply port and a discharge port. An annular processing gap is formed, and a rotatable rotor is inserted into the processing gap so as to divide the processing gap into an outer gap and an inner gap, and the above processing is performed by rotating the rotor. A circulation port is formed in the rotor so that material flows in the processing gap together with the dispersion medium through the outer gap to the inner gap and returns to the outer gap, and the dispersion medium is formed in the inner circumference stator. In a medium circulation type mill provided with a medium separating device so as to discharge only the processing material to the discharge port, the outer surface of the inner peripheral stator is close to the inner surface of the rotor and the rotor is separated. A medium circulation characterized by protruding protrusions extending along the axial direction of the rotor Mill is provided by the protrusion B - data - the flow of process material flowing vary along the inner surface of the can so that the processing material does not adhere to the inner side, the problems are solved.
[0010]
Further, according to the present invention, the dispersion chamber having the processing material supply port and the discharge port is provided with a cylindrical outer periphery stator and a cylindrical inner periphery stator positioned inside thereof. An annular processing gap into which material flows is formed, and a rotatable rotor is inserted into the processing gap to divide the processing gap into an outer gap and an inner gap. A circulation port is formed in the rotor so that the processing material flows together with the dispersion medium in the processing gap through the outer gap to the inner gap and returns to the outer gap, and the dispersion is distributed to the inner peripheral stator. in medium circulation type mill having a medium separator to be discharged only to the discharge port processing materials to separate the medium, the b - data - the inner lateral cross-sectional shape of a square, polygonal such as hexagonal, oval Thru | or a substantially ellipse shape or the deviation which shifted | deviated the center from the center of the said inner peripheral stator There is provided a medium circulation type mill, characterized in that formed in a circular shape, said Russia - data - processing the material so rotates the inner cross-sectional shape is formed in the above such as the cross-sectional shape is compressed or, It is released and it does not adhere to the inner surface of the rotor, so that the above problem can be solved.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The present invention can be applied to a medium circulation type mill such as a pipeline bead mill provided in the middle of a liquid feed line as described above, or a submersible disperser that can be dispersed in a batch manner. In the embodiment shown in Fig. 2, a pipeline bead mill in which a dispersion chamber (1) is provided in the middle of a pipe (L) for feeding a processing material such as a solid-liquid slurry solution to crush secondary aggregates. An embodiment applied to is shown.
[0012]
The main body (2) forming the dispersion chamber (1) has a material supply port (3) connected to the upstream pipe (L) on one side, and a downstream pipe (L) on the other end. A material discharge port (4) connected to is formed. The main body (2) is configured by connecting an inlet side member (5), an intermediate member (6), and a discharge side member (7) with bolts (8), respectively, to the inlet side member (5). The material supply port (3), inflow chamber (9), and glass beads, ceramic beads, and other dispersion media (beads) (10) inlets (11) are formed, and the shaft seal portion is formed. A drive shaft (14) driven by a motor (not shown) extends through the body (12) and the cover plate (13).
[0013]
An axial flow blade (15) is provided on the drive shaft (14) so as to generate an axial flow toward the material discharge port through the intermediate member (6) in the flow of the processing material entering the inflow chamber (9). Is provided. As the axial flow blade (15), it is preferable to use a scraping blade that acts to scrape the processing material that has entered the inflow chamber toward the intermediate member (6) as shown in the figure. It can also be used.
[0014]
The intermediate member (6) has an inward protruding edge (17) and an outer peripheral stirrer (18) for forming an inflow port (16) that protrudes inward toward the center and inclines downward in an inverted conical shape. The discharge side member (7) is provided with an inner peripheral stator (19) having an outlet (not shown) that communicates with the material discharge port (4). The outer peripheral stator (18) and the inner peripheral stator (19) are each formed in a cylindrical shape, and the material discharge port is formed inward of the outer peripheral stator (18) that opens to the material supply port side. An inner peripheral stator (19) that opens to the side is provided, and an annular bottomed processing gap (20) is formed between the two stators. The dispersion medium (10) is accommodated in the processing gap (20).
[0015]
The processing gap (20) is divided into an outer gap (21) and an inner gap (22) inside the processing gap, and the outer side gap (21) and the inner gap (22) are communicated at the tip side. -Tur (23) is inserted from the opening side of the processing gap. The rotor (23) is connected to a substantially frustoconical rotor end surface portion (24) attached to the lower end of the drive shaft (14) and the rotor end surface portion (24). A cylindrical rotor main body (25) is rotated in the processing gap (20) by the drive shaft. The width of the processing gap (20), especially the width of the outer gap (21), is formed to be the same as that of a normal annular type medium disperser, and the shearing force of the dispersion medium acts on the processing material efficiently. The width is made possible.
[0016]
When the rotor (23) rotates, the processing material and the dispersion medium (10) flow through the processing gap (20) by the rotor, and at this time, the outer gap (21) flows through the rotor (23). A circulation port (26) is formed in the rotor (23) so that the dispersion medium flowing through the inner gap (22) passes through the inner gap (22) to the outer gap (21).
[0017]
Note that a medium separator (27) having small holes, slits, mesh holes and the like is provided at the outlet of the inner periphery stator (19) to separate the dispersion medium (10) from the processing material. Is formed. In the figure, for the sake of explanation, the screen formed in a cylindrical shape with a mesh body is shown, but the screen can be attached to the outlet or can be formed in another appropriate medium separation structure. . In addition, the lower end of the inner surface of the rotor and the inner peripheral stirrer provided with an outlet at the upper end of the rotor are combined to form a gap that prevents the passage of the dispersion medium between the two members. A so-called gap separator may be formed (not shown).
[0018]
The processing gap (20) is filled with about 60 to 90% of the dispersion medium (10), and sent from the upstream pipe (L) to the dispersion chamber through the material supply port (3). The treatment material enters the outer gap (21) of the treatment gap (20) from the inlet (16) of the dispersion chamber (1) and flows into the inner gap (22). During this time, the dispersion medium (10) which is given a motion by the rotor (23) loosens the secondary aggregates in the treatment material or dissolves the solid particles by the impact force and grinding force generated between the dispersion media. The processing material is preliminarily dispersed into fine particles, and only the predispersed processing material flows from the material discharge port (4) to the downstream pipe (L) through a medium separation device (27) such as a screen. . In addition, you may make it adjust temperature by providing a jacket in appropriate parts, such as the circumference | surroundings of a dispersion chamber, a rotor.
[0019]
In the case of an immersion type disperser, the inlet side member (5) is removed, the dispersion chamber is immersed in the processing material stored in the tank, and the processing material is directly dispersed into the dispersion chamber using the inlet (16) as a supply port. After the above processing is performed, the processing material flowing out into the tank is circulated again from the inlet into the dispersion chamber, and the above processing is repeated to perform a desired dispersion processing.
[0020]
And Thus, as shown in FIG. 1, the b - data - (23), the inner peripheral stearyl - data - provided coaxially with the (19), but the horizontal cross-sectional shape of the inner is formed in a circular On the outer side surface of the inner peripheral stator (19), a projecting piece (close to the inner side surface of the rotor (23) and extending along the central axis of the rotor (23) ( 28) is projected. The projecting piece (28) has a polygonal shape such as a triangular or quadrangular cross section as shown in FIGS. 2 (A) and 2 (B), or a circular or elliptical outer periphery as shown in FIG. 2 (C). Is made into a rod-shaped body having a cross-sectional shape formed in a curved surface, and is attached to the support plate (29). In the case of a polygonal shape, the corner (30) is opposed to the flow so that the processing material flows obliquely with respect to the inner surface of the rotor (FIG. 2A). As shown in (B), the plane (31) may be made to face the flow so as to generate turbulent flow, or an auxiliary member (32) may be provided on the back side as shown in FIG. 2 (D).
[0021]
The length of the projecting piece (28) is an appropriate length within the axial length of the inner surface of the rotor (23), and the inner surface of the projecting piece (28) and the rotor (23). The gap between them is preferably at least about 4 times the particle size (bead diameter) of the used dispersion medium so as not to hinder the rotation of the rotor.
[0022]
With the above configuration, when the rotor (23) rotates, the processing material flowing along the inner surface of the rotor receives resistance at the projecting piece (28) and changes its flow. , Adhesion to the inner surface of the rotor is prevented.
[0023]
FIG. 3 shows another embodiment, and the basic configuration is the same as the embodiment shown in FIG. 1, but the cross-sectional shape of the inner surface of the rotor (23) is different. That is, the inner surface of the rotor is connected to the outer surface of the inner circumferential stator (19) and the rotor so that the processing material can be compressed and released when the rotor rotates. It is formed in an atypical cross-sectional shape in which the interval between the inner side surfaces changes in the circumferential direction. Examples of the irregular cross-sectional shape include polygonal shapes such as a square (33) and a hexagon (34) as shown in FIGS. 4 (A) and 4 (B), and an ellipse (35) to a circular shape as shown in FIG. 4 (C). As shown in FIG. 4D, an eccentric circle (36) in which the center of the circular shape of the inner surface of the rotor is shifted from the center of the inner circumference stirrer (19) can be formed.
[0024]
With the above configuration, when the rotor (23) rotates, the portion (37) where the distance between the outer surface of the inner peripheral stator (19) and the inner surface of the rotor (23) is wide is The treatment material is released and compressed in the narrow portion (38), and this release and compression are repeated to prevent the treatment material from adhering to the inner surface of the rotor (23). . In addition, you may make it use a protrusion piece as shown in the said Example together.
[0025]
According to experiments, Russia - data - (23) to form an inner transverse cross-section in a hexagonal inner peripheral stearyl - data - (19) subscription provided - made large the diameter of the medium separation device, such as down, The discharge flow rate can be increased, the number of times of compression and release is increased, and the treatment material can be reliably prevented from adhering to the inner surface of the rotor.
[0026]
The circulation port (26) formed in the rotor (23) may be opened radially as shown in FIG. 4 along the axial diameter direction of the rotor (23). As shown in FIG. 5A and FIG. 5, when the rotation direction of the rotor (23), an opening inclined backward with respect to the arrow (39) is provided as the circulation port (26a), the flow of the processing material and the dispersion medium Is performed smoothly and favorable results are obtained. In particular, as shown in FIG. 5, when the inner cross-sectional shape of the rotor (23) is formed into a polygonal cross-section, it is inclined backward on the extension line (tangential direction) of the side of the polygon. An open circulation port (26b) may be provided. As a result, the processing material and the dispersion medium flow out to the outer surface side (outer gap) of the rotor with less resistance in the tangential direction along the inner surface of the rotor when the compression is released. Such a flow is repeated, and adhesion of the processing material to the inner surface of the rotor is further prevented.
[0027]
【The invention's effect】
The present invention is configured as described above, and an annular processing gap is formed between the outer peripheral stator and the inner peripheral stator, and the rotor is inserted into the processing gap so that the processing gap becomes the outer gap. In the medium circulation type mill in which the processing material and the dispersion medium are circulated around the outer gap and the inner gap by the rotation of the rotor, the dispersion process is performed. Since the outer surface is provided with a projecting piece proximate to the inner surface of the rotor and extending along the axial direction of the rotor, the processing material flowing along the inner surface of the rotor The flow can be changed to prevent the processing material from adhering to the inner surface of the rotor.
[0028]
Further, in the above-mentioned medium circulation type mill, since the cross-sectional shape of the inner surface of the rotor is formed into a polygonal shape such as a quadrangle, a hexagon, an ellipse, a substantially ellipse, an eccentric circle, or the like, When the rotor rotates, the distance between the outer surface of the inner peripheral stator and the inner surface of the rotor changes widely in the circumferential direction, and the processing material is compressed in the narrow part and released in the wide part. By repeating the compression and release, the flow of the processing material is changed to prevent the processing material from adhering to the inner surface of the rotor.
[0029]
As described above, according to the present invention, the processing material can be prevented from adhering to the inner surface of the rotor, the dispersion efficiency can be improved, and the cleaning operation can be easily performed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of the present invention.
FIGS. 2A and 2B are explanatory views of an inner peripheral stator as viewed from above, wherein FIG. 2A is an explanatory view including a rotor, and FIGS. 2B to 2D are explanatory views showing other embodiments;
FIG. 3 is a partial cross-sectional view showing another embodiment of the present invention.
[4] an explanatory diagram showing a lateral cross-sectional shape of the inner side of the rotor, (A) is square, (B) hexagonal, (C) is oval, (D) Each description that the eccentric Figure.
Figure 5 is an explanatory diagram of another embodiment in which the cross-sectional shape of the inner side of the rotor to a hexagonal shape.
[Explanation of symbols]
1 Dispersion chamber 2 Main body 18 Outer periphery starter 19 Inner periphery starter
20 Processing gap 21 Outer gap 22 Inner gap 23 Rotor
26 Circulation port 28 Projection piece 33 Square 34 Hexagon 35 Oval
36 Eccentric circle

Claims

A dispersion chamber having a processing material supply port and a discharge port is provided with a cylindrical outer peripheral stator and a cylindrical inner peripheral stator positioned inside thereof, thereby forming an annular processing gap into which the processing material flows. A rotatable rotor is inserted into the processing gap so as to divide the processing gap into an outer gap and an inner gap, and the processing material is dispersed in the processing gap by the rotation of the rotor. A circulation port is formed in the rotor so as to flow with the medium through the outer gap to the inner gap and return to the outer gap, and the dispersion medium is separated into the inner peripheral stirrer to treat only the processing material. In a medium circulation type mill provided with a medium separation device for discharging to a discharge port, the outer surface of the inner circumferential stator is close to the inner surface of the rotor and extends along the axial direction of the rotor. A medium circulation type mill characterized in that a projecting piece extending in a protruding manner is provided.

2. The medium circulation type mill according to claim 1, wherein a gap between the tip of the protruding piece and an inner side surface of the rotor is a gap of 4 times or more the particle diameter of the dispersion medium.

Medium circulation mill according to claim 1 or 2 horizontal sectional shape of the protrusion is polygonal.

Cross-sectional shape of the protrusion is medium circulation mill according to claim 1 or 2 outer periphery is a cross-sectional shape which is a curved surface.

5. The medium circulation type mill according to claim 1, wherein the circulation port is inclined and opened rearward with respect to the rotation direction of the rotor.

A dispersion chamber having a processing material supply port and a discharge port is provided with a cylindrical outer peripheral stator and a cylindrical inner peripheral stator positioned inside thereof to form an annular processing gap into which the processing material flows, and the processing gap A rotatable cylindrical rotor is inserted into the processing gap so as to divide the inside into an outer gap and an inner gap, and the processing material passes through the outer gap together with the dispersion medium in the processing gap by the rotation of the rotor. A medium circulation type in which a circulation port is formed in the rotor so as to flow into the gap and return to the outer gap, and a medium separation device is provided so that the dispersion medium is separated from the inner peripheral stator and only the processing material is discharged to the discharge port. in the mill, medium circulating Mi, characterized in that the inner oval or substantially elliptical shape or around the cross-sectional shape of the rotor is formed in an eccentric circular shifted from the center of the inner peripheral stator .

A dispersion chamber having a processing material supply port and a discharge port is provided with a cylindrical outer peripheral stator and a cylindrical inner peripheral stator positioned inside thereof to form an annular processing gap into which the processing material flows, and the processing gap A rotatable cylindrical rotor is inserted into the processing gap so as to divide the inside into an outer gap and an inner gap, and the processing material passes through the outer gap together with the dispersion medium in the processing gap by the rotation of the rotor. A medium circulation type in which a circulation port is formed in the rotor so as to flow into the gap and return to the outer gap, and a medium separation device is provided so that the dispersion medium is separated from the inner peripheral stator and only the processing material is discharged to the discharge port. In the mill, a medium circulation type mill characterized in that a cross-sectional shape inside the rotor is a polygonal shape, and the circulation port is provided at a corner of the polygonal shape.

The medium circulation type mill according to claim 6 or 7 , wherein the circulation port is inclined and opened rearward with respect to the rotation direction of the rotor.

The circulation port is provided on the extension of the inner lateral cross-section of polygonal shape of the sides of the rotor, the medium circulating mill according to claim 7 which is open inclined rearwardly with respect to the rotational direction of the rotor .

Horizontal cross-sectional shape of the inside of the rotor, the medium circulating mill according to claim 9 is hexagonal.