JP2704488B2 - Stirring method - Google Patents

Stirring method

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Publication number
JP2704488B2
JP2704488B2 JP5347775A JP34777593A JP2704488B2 JP 2704488 B2 JP2704488 B2 JP 2704488B2 JP 5347775 A JP5347775 A JP 5347775A JP 34777593 A JP34777593 A JP 34777593A JP 2704488 B2 JP2704488 B2 JP 2704488B2
Authority
JP
Japan
Prior art keywords
stirring
liquid
blade
tank
paddle
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
Application number
JP5347775A
Other languages
Japanese (ja)
Other versions
JPH06312122A (en
Inventor
清 岡下
守 三島
誠治 吉木
正文 倉津
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Heavy Industries Ltd
Original Assignee
Sumitomo Heavy Industries Ltd
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Filing date
Publication date
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Priority to JP5347775A priority Critical patent/JP2704488B2/en
Publication of JPH06312122A publication Critical patent/JPH06312122A/en
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Publication of JP2704488B2 publication Critical patent/JP2704488B2/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
    • B01F27/906—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms  with fixed axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 

Description

【発明の詳細な説明】 【０００１】 【産業上の利用分野】本発明は、混合、溶解、晶析、反
応等を目的とした処理液の攪拌方法に関するものであ
る。 【０００２】 【従来の技術】従来、攪拌機の攪拌翼として、（Ａ）パ
ドル翼（平羽根翼）、傾斜羽根翼、直角タービン翼を一
段又は多段の形で使用することが多い。これらの攪拌翼
を使用する攪拌機では、翼回転数を高くして翼の外端か
ら半径方向に吐出される液の流量を多くすることによ
り、図１０に示す如く液が槽壁に衝突して上方及び下方
に回り再び翼のところに戻る循環流を発生させ、槽内の
混合を行う。（Ｂ）高粘度液には螺旋翼、螺旋状リボン
翼を多く使用している。また、（Ｃ）高粘度液や槽底部
に沈降し易い固体を含む液体には馬蹄型翼、アンカー型
翼を使用している。 【０００３】更に、（Ｃ）液体に対する固体の溶解には
糸巻翼を使用することが多い。上記（Ｂ），（Ｃ），
（Ｄ）の攪拌翼を使用する攪拌機では、翼の外端と槽と
の隙間を小さくして槽壁への付着防止、液体の移動、翼
による液体の剪断及び掻取りを行うことにより槽内の混
合、その他の目的を達成する。なお、これらの攪拌機
は、比較的低い翼回転数で使用されている。 【０００４】 【発明が解決しようとする課題】前記従来の（Ａ）の攪
拌翼のを図１０に示す如く一段の形で使用した場合、仮
に循環流の発生を促進するために槽壁面に下部から上部
に至る複数本の邪魔板を間隔をおき配設しても、大きい
攪拌所要動力を必要としながら混合時間がかなり長く、
動力特性及び混合特性が悪い。低速回転攪拌時の混合特
性はさらに悪い。 【０００５】（Ａ）の攪拌翼を多段の形で使用しても、
各段間での液体の交換が少なく、混合特性を改善するこ
とができないという不都合があった。また、前記従来の
（Ｂ），（Ｃ）の攪拌機では、その構造から低粘度液に
は有効ではないという不都合があった。更に、前記従来
の（Ｄ）の攪拌翼では、翼外端からの液の吐出力が非常
に弱く、液の循環・移動という現象が発生しにくいた
め、短時間に完全混合状態にできないという不都合があ
った。 【０００６】本発明は前記従来の課題を解決するために
なしたもので、殊に中粘度領域での攪拌の所要動力を低
減すると共に、低速回転での攪拌時（低所要動力時）の
混合性能を向上させることを目的とする。 【０００７】 【課題を解決するための手段】本発明の攪拌機は、処理
液を装入した攪拌槽１の中心部に槽外から挿入された回
転可能な攪拌軸２を配設し、該軸２に、攪拌槽１の底壁
面に下端部を摺接させて槽底部に配設される幅広平板か
らなるボトムパドル７を装着し前記攪拌軸２のボトムパ
ドル７より上位部分に、アーム部分８と該アーム部分８
と直角方向に延びるストリップ９から構成される格子翼
６を装着すると共に攪拌槽１の側壁面に 攪拌軸の軸方向
に延びる邪魔板１０を配設しｎ×ｄ ２ ×ρ／μで表され
るレイノルズ数Ｒ ｅ が３００＜Ｒ ｅ ＜５０００の範囲で
攪拌することにある。 但し、ｎ：翼回転数（１／ｓｅｃ），ｄ：翼径（ｍ），
ρ：液密度（ｋｇ／ｍ ３ ），μ：液粘度（ｋｇ／ｍ・ｓ
ｅｃ）。 【０００８】 【実施例】以下、その詳細を図１〜図９に示す実施例に
より説明する。図中１は円筒形攪拌槽で、該槽１内中心
部には攪拌軸２が配設されている。攪拌軸２は、一端を
槽底部に軸受３を介して支持され、かつ、他端を槽頂部
上の駆動装置４に攪拌槽内に、後述する格子翼６より上
部に設けたカップリング５を介て接続されている。【０００９】 ７は２枚パドルのボトムパドルで、攪拌軸
２の下端部に装着されており、その下端部は攪拌槽１の
底壁面に摺接している。このため、このボトムパドル７
は、従来公知のパドル翼と馬蹄型翼、アンカー型翼の両
特性（吐出、剪断掻取り）、つまりパドル翼の液を半径
方向に吐出する特性と、馬蹄型翼、アンカー型翼の壁面
付着物を掻取り、飛散、浮遊させる特性とを併せ備えて
いる。【００１０】 ６は格子翼で、攪拌軸２のボトムパドル７
より上位部分に装着されている。この格子翼６は、アー
ム部分８とストリップ９とから構成され、アーム部分８
は槽径方向に延びる板棒状の２枚パドルであり、ストリ
ップ９はアーム部分８と直角方向に延びる板棒状のもの
である。このため、格子翼６は、回転時、各構成部材端
で液を剪断し細分化すると共に、各構成部材の後側で発
生する微小の渦により前記細分化された液を混合する特
性を備えている。前記ストリップ９は、アーム部分８の
全部に跨がって（図１、図４）組み合わされて格子状に
形成されている。【００１１】 １０は平板型の邪魔板で、攪拌槽１の側壁
面に前記ボトムパドル７の側部上端部から格子翼６の側
部上端部まで延びる連続した１枚の平板で形成されてお
り、攪拌槽１の側壁面に一本、或は、円周方向に略等間
隔に複数本配設されている。即ち、この邪魔板１０は、
攪拌槽１の側壁面のボトムパドルの側部上端部から格子
翼６の側部上端部まで連続して攪拌軸２の軸方向に連続
しており、ボトムパドル７から吐出された液を円運動か
ら軸方向流に変えて攪拌槽１上部まで上昇させる特性を
備えている。【００１２】 尚、攪拌軸２を槽外から駆動するための駆
動装置４を槽頂部側に設けた例につき説明したが、該装
置４を槽底部側に設けてよい。この攪拌機では、攪拌操
作の中で注目操作（混合、溶解、各種反応等）により、
また所要容量によりその構成部材比が設定されるが、そ
の主な作用は次に述べる通りである。【００１３】 格子翼６とボトムパドル７を回転させる
と、攪拌槽１内に満たされて液は、ボトムパドル７によ
り槽底壁面への付着を防止されつつ半径方向に吐出され
て槽側壁面に衝突すると共に、邪魔板１０により円運動
を直線運動（攪拌軸の軸方向流）に変えられて槽上部へ
と上昇させられ、槽上部では側壁側から中心側へ移動し
て攪拌軸２及び格子翼６の最上段アーム部分８の近傍か
ら下方へ移動（流れ込み）し、ボトムパドル７のところ
に戻る。かかる大きな循環流の中で、ボトムパドル７よ
り上位に配置された格子翼６のアーム部分８とストリッ
プ９により下隆中の液が剪断細分化され、この細分化さ
れた液は、アーム部分８とストリップ９の後側に発生す
る微細渦に巻込まれて混合される。上記の作用を図解し
たのが図５，図６である。【００１４】 図５に示される如く、ボトムパドル７が、
従来のパドル翼と異なり攪拌槽１の底部に摺接配置され
ることにより、パドル翼と馬蹄型翼、アンカー型翼とし
ての両作用を併有する。また、図６に示される如く、邪
魔板１０が、ボトムパドル７により槽側壁側に吐出され
た液が円運動しないで上昇流となるように、その発生を
促進する作用を有する。また、格子翼６のアーム部分８
及びストリップ９は、ボトムパドル７及び邪魔板１０の
働きで槽内を循環する液をその下降過程で細分化、混合
する作用を有する。【００１５】 一般に、攪拌槽での翼の特性と性能を表わ
す係数として、混合開始後、翼外端から吐出された液が
攪拌槽内を何回循環すれば混合を完成させられるかとい
う循環回数があるが、比較テスト結果は、パドル翼（邪
魔板なし）が４〜７回、螺旋状リボン翼が２回であるの
に対して、本発明のもの（邪魔板付き）はその構成部材
比により少し幅があるものの１〜１．３回であった。【００１６】 攪拌槽での翼の混合特性を表すものとして
図７に示すｎ．θＭ〜Ｒｅ曲線がある。同図中ｎ．θＭ
は完全混合時間θＭ（ｓｅｃ）と翼の回転数ｎ（１／ｓ
ｅｃ）を乗じた翼に特有な値で、無次元混合時間といわ
れ、翼（槽条件も含む。）による液の混合性能を表す指
標である。Ｒｅは翼（槽条件を含む。）による液の乱れ
状態を示す指標で、レイノルズ数といわれ、ｎ・ｄ２・
ρ／μで表される。ここで、ｎ：翼回転数（１／ｓｅ
ｃ）、ｄ：翼径（ｍ）、ρ：液密度（ｋｇ／ｍ３）、
μ：液粘度（ｋｇ／ｍ・ｓｅｃ）。【００１７】 また、攪拌槽での翼の動力性能を表すもの
として図８に示すＮｐ〜Ｒｅ曲線がある。同図中Ｎｐは
翼（槽条件も含む。）による液の動力性能を表す指標
で、動力数といわれ、Ｐ・ｇｃ／ρ・ｎ３・ｄ５で表さ
れる。ここでＰ：動力（ｋｇｍ／ｓｅｃ、ｇｃ：単位換
算係数、ρ：液密度（ｋｇ／ｍ３）、ｎ：翼回転数（１
／ｓｅｃ）、ｄ：翼径（ｍ）。【００１８】 前記ｎ・θＭ〜Ｒｅ曲線とＮｐ〜Ｒｅ曲線
は、Ｄ（槽径）＝１ｍ、ｄ＝０．５ｍ、ρ＝１０００ｋ
ｇ／ｍ３のときに得られたものである。これらの曲線を
使用して、μ＝０．５ｋｇ／ｍ・ｓｅｃ（＝５００ｃ．
ｐ．）、ｎ＝１ｒ．ｐ．ｓとしたＲｅ＝５００の状態で
比較すると、混合時間ｎ・θＭは、本発明（Ｈ／Ｄ＝
１．０のとき）ではＡ点の値ａ＝１６、従来ではＣ点の
値ｃ＝８０であるから、本発明は従来に比して１／５の
混合時間で済み、ｎ＝１でも高い混合能力があることが
分かる。また、動力数Ｎｐは、本発明（Ｈ／Ｄ＝１．０
のとき）ではＥ点の値ｅ＝５、従来ではＧ点の値ｇ＝８
であるから、そのＲｅ＝５００の状態を作り出すのに必
要な動力値をＰ＝Ｎｐ・（ρ・ｎ３・ｄ５）／ｇｃで求
めると、本発明では１５．９４、従来では２５．５１と
なり、本発明は従来に比して１／１．６の攪拌所要動力
で済むことが分かる。【００１９】 また、混合前の液を同様のμ＝１／１００
０ｋｇ／ｍ・ｓｅｃ（１ｃ．ｐ．）、混合液の液をμ＝
０．５ｋｇ／ｍ・ｓｅｃ（５００ｃ．ｐ．）とすると、
混合時間ｎ・θＭは、粘度が高くなるに従って従来では
Ｃｏ点からＣ点へと変化し、その値の変化量Ｃ−Ｃｏは
大きくなって混合性能が悪くなるのに対して、本発明
（Ｈ／Ｄ＝１．３のとき）ではＢｏ点からＢ点へと変化
し、その値の変化量ｂ−ｂｏは殆ど零となるから、反応
液を攪拌する場合にも、攪拌開始時（低粘度液）から混
合終了時（高粘度液）まで殊に中粘度域での安定した混
合特性が得られ、反応液攪拌方法として効率良く製品の
歩留まりも良いことが分かる。【００２０】 さらには、図９に同じ安全混合時間θ
Ｍ（ｓｅｃ）に対応する所要動力について従来例と本発
明の例との比較を示す。これによれば、２０００ｃ．
ｐ．の混合液、１ｃ．ｐ．の混合液とも本発明のものは
従来のものに比べ大幅に小さいことが分かる。換言すれ
ば、本発明は小さい動力で従来と同等の性能を得ること
ができる。【００２１】 【発明の効果】本発明は以上の構成よりなり、次の効果
を奏するものである。 （１）翼回転数が低い値でも良い混合能力があるからレ
イノルズ数Ｒｅに対して広範囲に亘り、殊に、レイノル
ズ数Ｒ ｅ ：３００〜５０００の中粘度域での混合特性が
良い。 （２）循環回数が非常に小さいから、完全混合状態にな
るまでの時間（混合時間）が短い。 （３）低速回転攪拌時の混合特性が高いから、マイルド
な攪拌ができる。 （４）攪拌所要動力が小さくて済み、それでいて従来と
同等の性能が得られる。 （５）低粘度液から高粘度液まで、殊に中粘度域での安
定した混合特性を有するから、反応液の攪拌方法として
有効である。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of stirring a processing solution for the purpose of mixing, dissolving, crystallizing, reacting and the like. 2. Description of the Related Art Conventionally, (A) paddle blades (flat blade blades), inclined blade blades, and right-angle turbine blades are often used as stirring blades of a stirrer in one or more stages. In the stirrer using these stirring blades, by increasing the blade rotation speed and increasing the flow rate of the liquid discharged radially from the outer end of the blade, the liquid collides with the tank wall as shown in FIG. A circulating flow that goes up and down and returns back to the wings is generated to mix in the vessel. (B) Spiral blades and spiral ribbon blades are often used for high viscosity liquids. In addition, a horseshoe wing or an anchor wing is used for (C) a liquid containing a high-viscosity liquid or a solid that tends to settle at the bottom of the tank. Furthermore, (C) a wound blade is often used for dissolving a solid in a liquid. (B), (C),
In the stirrer using the stirring blade of (D), the gap between the outer end of the blade and the tank is reduced to prevent adhesion to the tank wall, to move the liquid, and to shear and scrape the liquid by the blade so that the inside of the tank is reduced. To achieve other purposes. In addition, these stirrers are used at a relatively low blade rotation speed. [0004] When the above-mentioned conventional stirring blade (A) is used in a single-stage form as shown in FIG. 10, a lower portion is provided on the wall of the tank in order to promote the generation of a circulating flow. Even if multiple baffles from the upper part to the upper part are arranged at intervals, the mixing time is considerably long while requiring large stirring power,
Poor power and mixing characteristics. The mixing characteristics during low-speed rotation stirring are even worse. [0005] Even if the stirring blade of (A) is used in a multi-stage form,
There is a disadvantage that the liquid exchange between the stages is small and the mixing characteristics cannot be improved. Further, the conventional stirrers (B) and (C) have a disadvantage that they are not effective for low-viscosity liquids due to their structure. Further, in the conventional stirring blade of (D), since the discharge force of the liquid from the outer end of the blade is very weak and the phenomenon of liquid circulation and movement is unlikely to occur, it is not possible to achieve a complete mixing state in a short time. was there. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. In particular, it is possible to reduce the power required for stirring in a medium viscosity region and to mix at low speed rotation (at low power). The purpose is to improve performance. [0007] Means for Solving the Problems] agitator of the present invention, the processing
A rotatable stirring shaft 2 inserted from the outside of the tank is disposed at the center of the stirring tank 1 in which the liquid is charged, and the lower end of the stirring tank 2 is slidably contacted with the bottom wall of the stirring tank 1 on the shaft 2. A bottom paddle 7 made of a wide flat plate is mounted on the stirrer shaft 2, and an arm portion 8 and the arm portion 8 are provided above the bottom paddle 7 of the stirring shaft 2.
Table In disposed baffles 10 extending in the axial direction of the 攪拌軸 n × d 2 × ρ / μ on the side wall surface of the stirring vessel 1 with attaching the lattice blade 6 consists of a strip 9 which extends in a direction perpendicular Is
Reynolds number Re is in the range of 300 < Re <5000
Is to stir. Where n: blade rotation speed (1 / sec), d: blade diameter (m),
ρ: liquid density (kg / m 3 ) , μ: liquid viscosity (kg / m · s)
ec). [0008] BRIEF DESCRIPTION by the examples shown in detail in FIGS. 1-9. In the figure, reference numeral 1 denotes a cylindrical stirring tank, and a stirring shaft 2 is provided in the center of the tank 1. The stirring shaft 2 has a coupling 5 having one end supported at the bottom of the tank via a bearing 3 and the other end provided to a drive unit 4 on the top of the tank, which is provided above a lattice blade 6 described later in the stirring tank. Connected through. Reference numeral 7 denotes a two-paddle bottom paddle, which is attached to the lower end of the stirring shaft 2, and the lower end of which is in sliding contact with the bottom wall surface of the stirring tank 1. Therefore, this bottom paddle 7
The characteristics of both the conventionally known paddle wing, horseshoe-shaped wing, and anchor-type wing (discharge and shearing), that is, the characteristic of discharging the paddle wing in the radial direction, and the characteristics of the horseshoe-type wing and the anchor-type wing It has the characteristics of scraping, scattering and floating kimono. Reference numeral 6 denotes a lattice blade, and a bottom paddle 7 of the stirring shaft 2
It is attached to a higher part. The lattice wing 6 is composed of an arm portion 8 and a strip 9, and the arm portion 8
Is a plate-shaped two paddle extending in the tank radial direction, and the strip 9 is a plate-rod extending in a direction perpendicular to the arm portion 8. For this reason, the lattice blade 6 has a characteristic that, when rotating, the liquid is sheared and fragmented at the end of each component, and the fragmented liquid is mixed by a minute vortex generated on the rear side of each component. ing. The strips 9 are formed so as to span the entire arm portion 8 (FIGS. 1 and 4) and are combined in a lattice shape. Reference numeral 10 denotes a flat baffle, which is formed of a single continuous plate extending from the upper end of the side of the bottom paddle 7 to the upper end of the side of the lattice blade 6 on the side wall of the stirring tank 1. One or a plurality of these are arranged on the side wall surface of the stirring tank 1 or at substantially equal intervals in the circumferential direction. That is, this baffle plate 10
The liquid discharged from the bottom paddle 7 is circularly moved continuously from the upper end of the side of the bottom paddle on the side wall surface of the stirring tank 1 to the upper end of the side of the lattice blade 6 in the axial direction of the stirring shaft 2. And a characteristic of changing the flow to an axial flow and ascending to the upper portion of the stirring tank 1. Although the description has been given of the example in which the driving device 4 for driving the stirring shaft 2 from outside the tank is provided at the top of the tank, the driving device 4 may be provided at the bottom of the tank. With this stirrer, attention operations (mixing, dissolution, various reactions, etc.) are performed during the stirring operation.
The component ratio is set according to the required capacity. The main operation is as follows. When the lattice blade 6 and the bottom paddle 7 are rotated, the liquid filled in the stirring tank 1 is discharged in the radial direction while being prevented from adhering to the bottom wall of the tank by the bottom paddle 7, and is discharged onto the side wall of the tank. At the same time as the collision, the circular motion is changed to a linear motion (axial flow of the stirring shaft) by the baffle plate 10 and is raised to the upper part of the tank. The wing 6 moves (flows) downward from near the uppermost arm portion 8 of the wing 6 and returns to the bottom paddle 7. In such a large circulating flow, the liquid in the lower ridge is sheared and fragmented by the arm portion 8 and the strip 9 of the lattice wing 6 disposed above the bottom paddle 7, and the fragmented liquid is divided into the arm portion 8 And the fine vortex generated behind the strip 9 and mixed. 5 and 6 illustrate the above operation. As shown in FIG . 5, the bottom paddle 7 is
Unlike the conventional paddle blades, the paddle blades are slidably disposed on the bottom of the stirring tank 1 to have both functions as a paddle blade, a horseshoe blade, and an anchor blade. Further, as shown in FIG. 6, the baffle plate 10 has an effect of promoting the generation so that the liquid discharged to the tank side wall by the bottom paddle 7 does not move circularly but flows upward. Also, the arm portion 8 of the lattice wing 6
The strip 9 has a function of subdividing and mixing the liquid circulating in the tank by the action of the bottom paddle 7 and the baffle plate 10 in the descending process. In general, as a coefficient representing the characteristics and performance of the blade in the stirring tank, the number of circulations of the number of circulations of the liquid discharged from the outer end of the blade after the start of mixing in the stirring tank to complete the mixing is described. Although the comparison test results show that the paddle wings (without baffle plate) are 4 to 7 times and the spiral ribbon wings are 2 times, whereas the one of the present invention (with baffle plate) has a component ratio of Although there was a little width, the number was 1 to 1.3 times. [0016] n shown in FIG. 7 as representing mixing characteristics of the wing of a stirring vessel. there is a θ M ~R e curve. In the figure, n. θ M
Is the complete mixing time θ M (sec) and the blade rotation speed n (1 / s)
ec) is a value peculiar to the blade multiplied by ec, and is referred to as a dimensionless mixing time, and is an index indicating the mixing performance of the liquid by the blade (including the tank conditions). R e is a measure of how disordered state of the liquid by the blades (including the bath conditions.), Is said to Reino Le's number, n · d 2 ·
It is represented by ρ / μ. Here, n: blade rotation speed (1 / se
c), d: blade diameter (m), ρ: liquid density (kg / m 3 ),
μ: liquid viscosity (kg / m · sec). Further, there is a N p to R e curve shown in FIG. 8 as representing power performance of the blade in the stirring vessel. N p in the figure is a indicator of the power performance of the liquid by the blades (bath conditions including.), Is said power number, represented by P · gc / ρ · n 3 · d 5. Here, P: power (kgm / sec, gc: unit conversion coefficient, ρ: liquid density (kg / m 3 ), n: blade rotation speed (1
/ Sec), d: blade diameter (m). [0018] The n · θ M ~R e curve and N p to R e curve, D (So径) = 1m, d = 0.5m, ρ = 1000k
g / m 3 . Using these curves, μ = 0.5 kg / m · sec (= 500 c.
p. ), N = 1r. p. s and R e = 500, the mixing time n · θ M is less than that of the present invention (H / D =
(At 1.0), the value a at point A = 16 and the value c at point C in the prior art are c = 80. Therefore, the present invention requires only 1/5 of the mixing time compared to the prior art, and is high even when n = 1 It can be seen that there is mixing ability. The power number N p, the present invention (H / D = 1.0
), The value e at the point E = 5, and the value g at the point G = 8 in the related art.
Since it is, when obtaining the power value required to produce the state of the R e = 500 by P = N p · (ρ · n 3 · d 5) / gc, in the present invention 15.94, in the conventional 25 .51, which indicates that the present invention requires only 1 / 1.6 power required for stirring as compared with the conventional art. Further , the liquid before mixing is mixed with the same μ = 1/100
0 kg / m · sec (1 cp), and the mixed solution was μ =
0.5 kg / m · sec (500 cp)
Conventionally, the mixing time n · θ M changes from the Co point to the C point as the viscosity increases, and the change amount C- Co of the value increases to deteriorate the mixing performance. invention change from (H / D = 1.3 when) the B o point to B point, because the amount of change b-bo values becomes almost zero, the reaction
Even when the liquid is stirred , stable mixing characteristics are obtained from the start of stirring (low viscosity liquid) to the end of mixing (high viscosity liquid), especially in the medium viscosity range, and the product is efficiently stirred as a reaction liquid stirring method. It can be seen that the yield is also good. [0020] Furthermore, the same safety mixing time in Figure 9 θ
A comparison between the conventional example and the example of the present invention for the required power corresponding to M (sec) is shown. According to this, 2000 c.
p. Of 1c. p. It can be seen that the mixture of the present invention is significantly smaller than the conventional mixture. In other words, the present invention can obtain the same performance as the conventional one with small power. The present invention has the above-described structure and has the following effects. (1) blade speed over a wide range relative to the Reynolds number R e because it is also a good mixing ability at a low value, in particular, Reynolds
'S number R e: mixing characteristics in the viscosity range within the 300-5000 good. (2) Since the number of circulations is very small, the time (mixing time) until the mixture is completely mixed is short. (3) Since the mixing characteristics at the time of low-speed rotation stirring are high, mild stirring can be performed. (4) The power required for stirring is small, and performance equivalent to that of the related art can be obtained. (5) It has a stable mixing characteristic from a low-viscosity liquid to a high-viscosity liquid , particularly in a medium viscosity region, and is therefore effective as a method for stirring the reaction liquid .

【図面の簡単な説明】 【図１】本発明の第１実施例を示すもので、正断面図。 【図２】本発明の第１実施例を示すもので、ＩＩ−ＩＩ
線断面図。 【図３】本発明の第１実施例を示すもので、ＩＩＩ−Ｉ
ＩＩ線断面図。 【図４】本発明の第２実施例を部分破断で示す斜視図。 【図５】本発明の作用説明図。 【図６】本発明の作用説明図。 【図７】ｎ・θＭ〜Ｒｅ線図。 【図８】Ｎｐ〜Ｒｅ線図。 【図９】θＭ〜ＰＶ線図。 【図１０】従来のパドル翼を使用した攪拌機の概要図。 【符号の説明】 １ 攪拌槽 ２ 攪拌軸 ３ 軸受 ４ 駆動装置 ５ カップリング ６ 格子翼 ７ ボトムパドル ８ アーム部分 ９ ストリップ １０ 邪魔板BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front sectional view showing a first embodiment of the present invention. FIG. 2 shows a first embodiment of the present invention, in which II-II
Line sectional view. FIG. 3 shows a first embodiment of the present invention, and is similar to III-I.
II sectional drawing. FIG. 4 is a perspective view showing a second embodiment of the present invention by partially breaking it. FIG. 5 is a diagram illustrating the operation of the present invention. FIG. 6 is a diagram illustrating the operation of the present invention. [7] n · θ M ~R e diagram. FIG. 8 is an N p to R e diagram. [9] θ M ~P V diagram. FIG. 10 is a schematic diagram of a conventional stirrer using paddle blades. [Description of Signs] 1 Stirring tank 2 Stirring shaft 3 Bearing 4 Drive unit 5 Coupling 6 Lattice blade 7 Bottom paddle 8 Arm part 9 Strip 10 Baffle plate

フロントページの続き (72)発明者 吉木 誠治 愛媛県東予市今在家1501番地 住友重機 械工業株 式会社 東予製造所内 (72)発明者 倉津 正文 愛媛県東予市今在家1501番地 住友重機 械工業株 式会社 東予製造所内 (56)参考文献 特公 昭38−25342（ＪＰ，Ｂ１) 実公 昭46−34623（ＪＰ，Ｙ１) 西独特許1222261（ＤＥ，Ｂ) 「化学工学▲ＩＩ▼」 Ｐ．183−185 （1965．岩波書店) 「Ｃｈｅｍｉｃａｌ Ｅｎｇｉｎｅｅ ｒ’ｓ Ｈａｎｄｂｏｏｋ」 Ｐ．19− 11 （1963．ＭｃＧｒａｗＨｉｌｌ Ｂ ｏｏｋ)Continuation of front page    (72) Inventor Seiji Yoshiki               1501 Imaizaie, Toyo City, Ehime Prefecture Sumitomo Heavy Industries               Machinery Co., Ltd.Toyo Factory (72) Inventor Masafumi Kuratsu               1501 Imaizaie, Toyo City, Ehime Prefecture Sumitomo Heavy Industries               Machinery Co., Ltd.Toyo Factory                (56) References JP-B-38-25342 (JP, B1)                 Jiko 46-34623 (JP, Y1)                 West German Patent 1222261 (DE, B)                 “Chemical Engineering II” 183-185                 (1965. Iwanami Shoten)                 "Chemical Engineer               r's Handbook " 19−               11 (1963. McGrawHill B               OK)

Claims (1)

(57)【特許請求の範囲】 １） 処理液を装入した攪拌槽（１）の中心部に槽外か
ら挿入された回転可能な攪拌軸（２）を配設し、該軸
（２）に、攪拌槽（１）の底壁面に下端部を摺接させて
槽底部に配設される幅広平板からなるボトムパドル
（７）を装着し前記攪拌軸（２）のボトムパドル（７）
より上位部分に、アーム部分（８）と該アーム部分
（８）と直角方向に延びるストリップ（９）から構成さ
れる格子翼（６）を装着すると共に攪拌槽（１）の側壁
面に攪拌軸の軸方向に延びる邪魔板（１０）を配設しｎ
×ｄ ２ ×ρ／μで表されるレイノルズ数Ｒ ｅ が３００＜
Ｒ ｅ ＜５０００の範囲で攪拌することを特徴とする処理
液の攪拌方法。 但し、ｎ：翼回転数（１／ｓｅｃ），ｄ：翼径（ｍ），
ρ：液密度（ｋｇ／ｍ ３ ），μ：液粘度（ｋｇ／ｍ・ｓ
ｅｃ）。 (57) [Claims] 1) A rotatable stirring shaft (2) inserted from outside the tank is disposed at the center of the stirring tank (1) in which the processing liquid is charged, and the shaft (2) The bottom paddle (7) made of a wide flat plate is mounted on the bottom wall of the stirring tank (1) by sliding the lower end of the bottom paddle (7). The bottom paddle (7) of the stirring shaft (2) is mounted on the bottom paddle (7).
Higher up portion, 攪拌the side wall surface of the stirring vessel (1) with mounting arm portion (8) and lattice blade (6) composed of strips (9) extending in a direction perpendicular the arm portion (8) disposed baffle plate (10) extending in the axial direction of the shaft and n
× Reynolds number R e 300 represented by d 2 × ρ / μ <
Processing characterized by stirring in the range of R e <5000
Liquid stirring method. Where n: blade rotation speed (1 / sec), d: blade diameter (m),
ρ: liquid density (kg / m 3 ), μ: liquid viscosity (kg / m · s)
ec).
JP5347775A 1993-12-24 1993-12-24 Stirring method Expired - Lifetime JP2704488B2 (en)

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US8466324B2 (en) 2008-11-17 2013-06-18 Sumitomo Seika Chemicals Co., Ltd. Sulfone compound
KR102030222B1 (en) 2012-06-29 2019-10-08 주식회사 쿠라레 Method for producing (meth)acrylic resin composition
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CN104209031A (en) * 2014-09-10 2014-12-17 南通密炼捏合机械有限公司 High-efficiency material mixing machine with weighing function
CN104923099A (en) * 2015-05-26 2015-09-23 孙美娜 Automatic stirring device for mixing chemical reagent
GB201514334D0 (en) * 2015-08-12 2015-09-23 Johnson Matthey Davy Technologies Ltd Apparatus
WO2018025508A1 (en) 2016-08-02 2018-02-08 株式会社トクヤマ Adhesive composition, laminate, and optical article including said laminate
CN106219087A (en) * 2016-08-26 2016-12-14 海洲环保集团有限公司 A kind of mother liquor tank

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Title
「Ｃｈｅｍｉｃａｌ Ｅｎｇｉｎｅｅｒ’ｓ Ｈａｎｄｂｏｏｋ」 Ｐ．１９−１１ （１９６３．ＭｃＧｒａｗＨｉｌｌ Ｂｏｏｋ）
「化学工学▲ＩＩ▼」 Ｐ．１８３−１８５ （１９６５．岩波書店）

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