JPH10128155A - Screw type decanter - Google Patents
Screw type decanterInfo
- Publication number
- JPH10128155A JPH10128155A JP30390096A JP30390096A JPH10128155A JP H10128155 A JPH10128155 A JP H10128155A JP 30390096 A JP30390096 A JP 30390096A JP 30390096 A JP30390096 A JP 30390096A JP H10128155 A JPH10128155 A JP H10128155A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- liquid
- screw shaft
- screw
- stock solution
- 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.)
- Granted
Links
Landscapes
- Centrifugal Separators (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、スクリュー型デカ
ンタに関し、更に詳しくはスクリュー型デカンタの原液
供給管の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw type decanter, and more particularly, to a structure of a stock solution supply pipe of the screw type decanter.
【０００２】[0002]
【従来の技術】この種のスクリュー型デカンタは、固形
成分を含む原液スラリーを連続処理して固液分離するの
に適しているため、従来から化学工業、食品工業、廃水
処理等多くの分野で使用されている。そこで、従来のス
クリュー型デカンタについて概説する。従来のスクリュ
ー型デカンタは、図２に示すように、横置き型の筒状ケ
ーシング１と、このケーシング１の両端面の中心に合わ
せて配設された左右の主軸受２、２に軸支され且つケー
シング１内に収納されたシリンダー３と、このシリンダ
ー３に内接し且つシリンダー３とは若干の差速をもって
回転するスクリューコンベヤ４と、このスクリューコン
ベヤ４が螺旋状に巻着された中空状のスクリュー軸５
と、このスクリュー軸５内にこれと同軸に挿着された原
液供給管６とを備え、原液供給管６から供給された原液
スラリーがシリンダー３側に供給され、シリンダー３の
内周面で遠心力により液層Ｌを形成すると共に原液スラ
リー中の粒状物質等の固形成分を液体との比重差により
遠心分離するように構成されている。2. Description of the Related Art A screw type decanter of this type is suitable for continuous processing of a stock slurry containing solid components and for solid-liquid separation. Therefore, it has been conventionally used in many fields such as chemical industry, food industry, waste water treatment and the like. It is used. Therefore, a conventional screw type decanter will be outlined. As shown in FIG. 2, the conventional screw type decanter is supported by a horizontal cylindrical casing 1 and left and right main bearings 2 arranged at the centers of both end surfaces of the casing 1. A cylinder 3 housed in the casing 1; a screw conveyor 4 inscribed in the cylinder 3 and rotating at a slightly different speed from the cylinder 3; Screw shaft 5
And a stock solution supply pipe 6 coaxially inserted into the screw shaft 5. The stock solution slurry supplied from the stock solution supply pipe 6 is supplied to the cylinder 3 side, and centrifuged on the inner peripheral surface of the cylinder 3. The liquid layer L is formed by force, and a solid component such as particulate matter in the stock slurry is centrifuged by a specific gravity difference from the liquid.
【０００３】上記シリンダー３は、図２に示すように、
右端が大径端部３１として形成され、左端が小径端部３
２として形成されている。大径端部３１には軸支部３３
を囲む複数の軽液口３４が周方向等間隔に穿設され、シ
リンダー３内で固形成分が遠心分離されて比重の小さな
上澄液（以下、「軽液」と称す。）が矢印Ｃで示すよう
に軽液口３４から排出する。また、シリンダー３の左端
部には複数の重液口３５が周方向等間隔に穿設され、シ
リンダー３内で固形成分の沈澱物を含む比重の大きなス
ラリー（以下、「重液」と称す。）がスクリューコンベ
ヤ４によってシリンダー３の傾斜部を掻き上げられて矢
印Ｄで示すように重液口３５から排出する。また、スク
リュー軸５はシリンダー３内で副軸受７、７によってそ
れぞれ軸支され、左端のスプライン軸８を介して減速機
９に連結され、シリンダー３とは若干の差速をもってス
クリューコンベヤ４と一体に同方向へ回転する。[0003] As shown in FIG.
The right end is formed as a large-diameter end 31 and the left end is a small-diameter end 3.
2 is formed. The large diameter end 31 has a shaft support 33
Are formed at equal intervals in the circumferential direction, and the solid component is centrifuged in the cylinder 3 and a supernatant liquid having a low specific gravity (hereinafter, referred to as “light liquid”) is indicated by an arrow C. The liquid is discharged from the light liquid port 34 as shown. A plurality of heavy liquid ports 35 are formed at the left end of the cylinder 3 at equal intervals in the circumferential direction, and a slurry having a high specific gravity containing a solid component precipitate in the cylinder 3 (hereinafter, referred to as “heavy liquid”). ) Is scraped up by the screw conveyor 4 on the inclined portion of the cylinder 3 and discharged from the heavy liquid port 35 as shown by the arrow D. The screw shaft 5 is supported by sub bearings 7 and 7 in the cylinder 3 and connected to a speed reducer 9 via a spline shaft 8 at the left end. In the same direction.
【０００４】また、原液供給管６は入口端部がホルダー
１０で固定され、出口端部がスクリュー軸５の略中間ま
で延設されている。この原液供給管６は図示しない接続
管路を介して矢印Ａ方向から流入した原液スラリーを出
口端からスクリュー軸５へ供給する。スクリュー軸５内
の原液スラリーは遠心力によりスクリュー軸５に穿設さ
れた複数の分配孔５１から矢印Ｂで示すようにシリンダ
ー３側へ噴出し、シリンダー３内では原料スラリーが上
述のように軽液と重液に遠心分離される。The stock solution supply pipe 6 has an inlet end fixed by a holder 10 and an outlet end extending almost to the middle of the screw shaft 5. The stock solution supply pipe 6 supplies the stock solution slurry that has flowed in the direction of arrow A through a connection pipe (not shown) to the screw shaft 5 from the outlet end. The undiluted slurry in the screw shaft 5 is ejected toward the cylinder 3 by a centrifugal force from a plurality of distribution holes 51 formed in the screw shaft 5 as shown by an arrow B, and the raw slurry is lightened in the cylinder 3 as described above. Centrifuged into liquid and heavy liquid.
【０００５】[0005]
【発明が解決しようとする課題】以上概説したように、
従来のスクリュー型デカンタには以下のような課題があ
った。即ち、シリンダー３の回転数が高く、遠心力が大
きい場合には、原液供給管６の先端から流出する原液ス
ラリーには強い遠心力が作用するため、スクリュー軸５
内の原液スラリーは複数の分配孔５１を速い速度で通過
して飛散し、シリンダー３の内周面に形成されている液
層Ｌと激しく衝突し、液層Ｌを攪乱して混合し、原液ス
ラリーの遠心分離効率を低下させる。SUMMARY OF THE INVENTION As outlined above,
The conventional screw type decanter has the following problems. That is, when the rotation speed of the cylinder 3 is high and the centrifugal force is large, a strong centrifugal force acts on the stock slurry flowing out from the tip of the stock solution supply pipe 6.
The undiluted slurry in the inside passes through the plurality of distribution holes 51 at a high speed and scatters, collides violently with the liquid layer L formed on the inner peripheral surface of the cylinder 3, disturbs and mixes the liquid layer L, and Decrease the efficiency of centrifuging the slurry.
【０００６】また、従来のスクリュー型デカンタを分級
器として用いる場合には、シリンダー３の回転数を低く
する必要があるが、この場合には、原液供給管６から流
出する原液にかかる遠心力が小さいため、原液供給管６
から流出した原液スラリーがスクリュー軸５内に滞留
し、スクリュー軸５側から分配孔５１を介してスクリュ
ーコンベヤ４側へ連続して安定的に供給されず、安定し
た分級を行うことができなかった。When a conventional screw type decanter is used as a classifier, the rotation speed of the cylinder 3 must be reduced. In this case, the centrifugal force applied to the stock solution flowing out of the stock solution supply pipe 6 is reduced. Because it is small, the stock solution supply pipe 6
Of the stock solution flowing out of the screw shaft 5 stays in the screw shaft 5, and is not continuously and stably supplied from the screw shaft 5 side to the screw conveyor 4 side via the distribution hole 51, so that stable classification cannot be performed. .
【０００７】本発明は、上記課題を解決するためになさ
れたもので、シリンダーの内周面で形成される液層を攪
乱することなく原液をスクリュー軸内部からシリンダー
側へ供給し、原液の分離効率を高めて効率良く遠心分離
することができ、しかも、低い回転速度でも原液をスク
リュー軸内部からシリンダー側へ連続的且つ安定的に供
給することができるスクリュー型デカンタを提供するこ
とを目的としている。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and supplies a stock solution from the inside of a screw shaft to the cylinder side without disturbing a liquid layer formed on the inner peripheral surface of the cylinder to separate the stock solution. It is an object of the present invention to provide a screw type decanter that can efficiently perform centrifugal separation with high efficiency and can supply a stock solution continuously and stably from the inside of a screw shaft to a cylinder side even at a low rotation speed. .
【０００８】[0008]
【課題を解決するための手段】本発明の請求項１に記載
のスクリュー型デカンタは、一端部が大径に形成され且
つ他端部が小径に形成された回転シリンダーと、このシ
リンダーと同軸に若干の差速をもって回転し且つ外周面
にスクリューコンベヤが巻着された中空状のスクリュー
軸と、このスクリュー軸内に同軸に挿着された原液供給
管とを備え、上記原液供給管から供給された原液スラリ
ーを遠心分離して上記シリンダーの大径端部に穿設され
た軽液口から軽液を排出すると共に、上記シリンダーの
小径端部に穿設された重液口から重液を排出するスクリ
ュー型デカンタにおいて、上記原液供給管の出口端にこ
れと同軸に先端が閉じた給液筒を延設すると共に、上記
給液筒に上記スクリュー軸の周壁を貫通し上記シリンダ
ー側の液層内へ原液を供給する給液ノズルを設けたこと
を特徴とするものである。According to a first aspect of the present invention, there is provided a screw type decanter comprising: a rotary cylinder having one end formed with a large diameter and the other end formed with a small diameter; A hollow screw shaft that rotates at a slight speed difference and has a screw conveyor wound around the outer peripheral surface thereof, and a stock solution supply pipe coaxially inserted into the screw shaft, is supplied from the stock solution supply pipe. The centrifugal separation of the undiluted liquid slurry discharges the light liquid from the light liquid port formed at the large-diameter end of the cylinder, and discharges the heavy liquid from the heavy liquid port formed at the small-diameter end of the cylinder. In the screw type decanter, a liquid supply tube having a closed end is coaxially extended with the outlet end of the stock solution supply pipe, and the liquid layer on the cylinder side is formed by penetrating the peripheral wall of the screw shaft into the liquid supply tube. Into Hara In which it characterized in that a liquid supply nozzle for supplying a.
【０００９】[0009]
【発明の実施の形態】以下、図１に示す実施形態に基づ
いて本発明を説明する。尚、図１は本発明のスクリュー
型デカンタの一実施形態を示す軸方向の要部縦断面図で
ある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in FIG. FIG. 1 is a longitudinal sectional view of a main part in an axial direction showing an embodiment of the screw type decanter of the present invention.
【００１０】本実施形態のスクリュー型デカンタは、図
１に示すように、原液供給管及びスクリュー軸の構造を
異にする以外は基本的には図２に示すものに準じて構成
されている。そのため、以下では、図１に示すスクリュ
ー型デカンタと同一または相当部分には同一符号を附し
てそれぞれの説明を省略し、本発明の特徴を中心に説明
する。As shown in FIG. 1, the screw type decanter of this embodiment is basically configured in accordance with the one shown in FIG. 2 except that the structures of the stock solution supply pipe and the screw shaft are different. Therefore, hereinafter, the same or corresponding parts as those of the screw type decanter shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted, and the description will focus on the features of the present invention.
【００１１】本実施形態のスクリュー型デカンタは、図
１に示すように、右端部が大径に形成された且つ左端部
が小径に形成されたシリンダー３と、このシリンダー３
と同軸に若干の差速をもって回転し且つ外周面にスクリ
ューコンベヤ４が巻着された中空状のスクリュー軸５
と、このスクリュー軸５内に同軸に挿着された原液供給
管１１とを備え、減速機（図２参照）によりスクリュー
コンベヤ４及びスクリュー軸５がシリンダー３とは若干
の差速をもって回転し、原液供給管１１からシリンダー
３内に供給された原液スラリーが遠心力を受けて軽液と
重液に分離され、シリンダー３の大径端部３１に穿設さ
れた軽液口３４から比重の小さい軽液を排出すると共
に、シリンダー３の小径端部に穿設された重液口（共に
図２参照）から比重の大きい重液を排出する。As shown in FIG. 1, a screw type decanter according to the present embodiment comprises a cylinder 3 having a large diameter at the right end and a small diameter at the left end.
A hollow screw shaft 5 rotating coaxially with a slight differential speed and having a screw conveyor 4 wound around its outer peripheral surface
And a stock solution supply pipe 11 coaxially inserted into the screw shaft 5. The screw conveyor 4 and the screw shaft 5 are rotated by a speed reducer (see FIG. 2) at a slightly different speed from the cylinder 3, The undiluted liquid slurry supplied from the undiluted liquid supply pipe 11 into the cylinder 3 is subjected to centrifugal force and separated into a light liquid and a heavy liquid, and has a small specific gravity from a light liquid port 34 formed in the large-diameter end 31 of the cylinder 3. While discharging the light liquid, a heavy liquid having a large specific gravity is discharged from a heavy liquid port (both shown in FIG. 2) formed in the small diameter end of the cylinder 3.
【００１２】上記シリンダー３は、図１に示すように、
右側に分離ゾーンとして形成された直胴部３７と、直胴
部３７の左側に截頭円錐状の濃縮ゾーンとして形成され
たコーン部３６とからなり、液層Ｌ内で遠心分離された
軽液は大径端部３１の軽液口３４から溢流し、沈澱物は
スクリューコンベヤ４によって濃縮ゾーンへ移送され、
ここで更に濃縮され、重液として小径端部３２の重液口
（図２参照）から排出される。The cylinder 3 is, as shown in FIG.
The light liquid which is formed of a straight body portion 37 formed as a separation zone on the right side and a cone portion 36 formed as a truncated conical concentration zone on the left side of the straight body portion 37, and is centrifuged in the liquid layer L. Overflows from the light liquid port 34 of the large-diameter end portion 31, and the precipitate is transferred to the concentration zone by the screw conveyor 4,
Here, it is further concentrated and discharged from the heavy liquid port (see FIG. 2) of the small-diameter end portion 32 as a heavy liquid.
【００１３】上記スクリューコンベヤ４は、上記直胴部
３７の内周面に内接するように螺旋状に形成され、スク
リュー軸５に固定されている。このスクリュー軸５内に
は原液供給管１１が同軸に挿入され、この原液供給管１
１を介して直胴部３７内へ原液スラリーを供給する。こ
の原液供給管１１は固定リング１６を介してスクリュー
軸５内に固定され、スクリュー軸５と一体的に回転す
る。原液供給管１１の先端には給液筒１２が基端部で連
結され、先端が直胴部３７とコーン部３６の境界近傍ま
で伸びている。この給液筒１２は、先端が閉じ、その基
端にフランジ部１２Ａを有し、このフランジ部１２Ａを
介してスクリュー軸５に対して固定されている。The screw conveyor 4 is formed in a spiral shape so as to be inscribed in the inner peripheral surface of the straight body portion 37, and is fixed to the screw shaft 5. A stock solution supply pipe 11 is coaxially inserted into the screw shaft 5, and the stock solution supply pipe 1
The undiluted slurry is supplied to the inside of the straight body portion 37 through the line 1. The stock solution supply pipe 11 is fixed in the screw shaft 5 via a fixing ring 16 and rotates integrally with the screw shaft 5. The liquid supply tube 12 is connected to the distal end of the undiluted liquid supply pipe 11 at the base end, and the distal end extends to near the boundary between the straight body portion 37 and the cone portion 36. The liquid supply cylinder 12 has a flange 12A at the base end and a base end, and is fixed to the screw shaft 5 via the flange 12A.
【００１４】また、上記給液筒１２には複数の給液ノズ
ル１３が取り付けられている。即ち、図１に示すように
給液筒１２には長手方向に２個の孔が形成され、また、
２個の孔から例えば周方向へ１８０°偏倚した位置に２
個の孔が同様に形成されている。更に、給液筒１２には
２個の孔の中間位置で周方向へ例えば±９０°偏倚した
位置に１個の孔が形成されている。また、スクリュー軸
５には給液筒１２の各孔に対向させた貫通孔１７が形成
されている。そして、給液筒１２の各孔には給液ノズル
１３が基端で固定されて半径方向外方へ伸び、その先端
がスクリュー軸５の各貫通孔１７を貫通している。しか
も、各給液ノズル１３はシリンダー３内周面で形成され
る液層Ｌ内に浸漬する長さに形成されている。A plurality of liquid supply nozzles 13 are attached to the liquid supply cylinder 12. That is, as shown in FIG. 1, two holes are formed in the liquid supply cylinder 12 in the longitudinal direction.
At a position deviated from the two holes by 180 ° in the circumferential direction, for example,
Individual holes are similarly formed. Furthermore, one hole is formed in the liquid supply cylinder 12 at a position deviated in the circumferential direction by, for example, ± 90 ° at an intermediate position between the two holes. Further, a through hole 17 is formed in the screw shaft 5 so as to face each hole of the liquid supply cylinder 12. A liquid supply nozzle 13 is fixed to a base end of each hole of the liquid supply cylinder 12 and extends radially outward, and a distal end of each nozzle penetrates each through hole 17 of the screw shaft 5. In addition, each liquid supply nozzle 13 is formed to have a length immersed in a liquid layer L formed on the inner peripheral surface of the cylinder 3.
【００１５】従って、スクリュー型デカンタにより原液
スラリーを遠心分離している時には、給液ノズル１３の
先端がシリンダー３内の液層Ｌ内に確実に浸漬され、液
層Ｌ内へ原液スラリーを層流で供給し、液層Ｌを極力撹
乱せず、遠心分離を効率良く行うことができる。給液ノ
ズル１３の個数は、原液スラリーの供給量に即して流速
が最適になるように設定し、また、給液ノズル１３の長
さは、液層Ｌの攪乱をより少なくなるように設定する。Therefore, when the undiluted slurry is centrifuged by the screw type decanter, the tip of the feed nozzle 13 is surely immersed in the liquid layer L in the cylinder 3 and the undiluted slurry is flowed into the liquid layer L. And centrifugal separation can be performed efficiently without disturbing the liquid layer L as much as possible. The number of the liquid supply nozzles 13 is set so that the flow rate is optimized in accordance with the supply amount of the undiluted slurry, and the length of the liquid supply nozzle 13 is set so that the disturbance of the liquid layer L is reduced. I do.
【００１６】また、原液供給管１１は、入口端部の外周
面にシール部材１４が装着され、シール押さえ部材１５
によって回転自在に支持されている。原液供給管１１の
外周面とシリンダー３の軸支部３３の内周面との間には
両者が回転自在になるように僅かな隙間がある。The stock solution supply pipe 11 is provided with a seal member 14 on the outer peripheral surface of the inlet end, and a seal holding member 15.
It is rotatably supported by. There is a slight gap between the outer peripheral surface of the stock solution supply pipe 11 and the inner peripheral surface of the shaft support 33 of the cylinder 3 so that both can freely rotate.
【００１７】次に、動作について説明する。減速機が始
動すると、シリンダー３が高速回転すると共にスクリュ
ーコンベヤ４及びスクリュー軸５がシリンダー３より若
干遅い速度で回転する。この時、原液供給管１１へ原液
スラリーを図１の矢印Ａ方向から連続的に供給すると、
原液スラリーは原液供給管１１から給液筒１２へ到達す
る。給液筒１２はスクリュー軸５と一体に回転してるた
め、給液筒１２内に到達した原液スラリーは図１の矢印
Ｂで示すように遠心力により複数箇所の給液ノズル１３
を経由してシリンダー３の内周面に向けて流出する。給
液ノズル１３内では原液スラリーは層流を作って流れ、
シリンダー３の内周面へ案内される。Next, the operation will be described. When the speed reducer is started, the cylinder 3 rotates at a high speed, and the screw conveyor 4 and the screw shaft 5 rotate at a slightly lower speed than the cylinder 3. At this time, when the stock slurry is continuously supplied to the stock solution supply pipe 11 from the direction of arrow A in FIG.
The stock solution slurry reaches the stock tube 12 from the stock solution supply pipe 11. Since the liquid supply cylinder 12 rotates integrally with the screw shaft 5, the undiluted slurry that has reached the liquid supply cylinder 12 is subjected to centrifugal force as shown by an arrow B in FIG.
And flows out toward the inner peripheral surface of the cylinder 3. In the liquid supply nozzle 13, the stock slurry flows in a laminar flow,
It is guided to the inner peripheral surface of the cylinder 3.
【００１８】シリンダー３側へ供給された原液スラリー
はシリンダー３の遠心力によりその内周面で液層Ｌを形
成すると共に原液スラリー中の固形成分は液体との比重
差により液体より大きな遠心力を受けて液層Ｌ内で沈澱
して重液層を作り、液層Ｌの表層部で比重が小さくなっ
た軽液層を作る。そして、原液スラリーの連続供給によ
り、シリンダー３内の液層Ｌの深さが徐々に深くなり、
遂には液層Ｌが給液ノズル１３に達し、給液ノズル１３
の先端が液層Ｌ内に浸漬される。The stock slurry supplied to the cylinder 3 forms a liquid layer L on its inner peripheral surface due to the centrifugal force of the cylinder 3, and the solid component in the stock slurry has a greater centrifugal force than the liquid due to the difference in specific gravity from the liquid. Upon receipt, the liquid layer L precipitates to form a heavy liquid layer, and a light liquid layer having a lower specific gravity is formed at the surface of the liquid layer L. Then, by continuous supply of the stock solution slurry, the depth of the liquid layer L in the cylinder 3 gradually increases,
Finally, the liquid layer L reaches the liquid supply nozzle 13 and the liquid supply nozzle 13
Is immersed in the liquid layer L.
【００１９】給液ノズル１３の先端が液層Ｌ内に浸漬さ
れると、原液スラリーは給液ノズル１３から層流で液層
Ｌ内に流れ込み、従来のように液層Ｌを攪乱することな
く静かに液層Ｌ内へ供給される。このように本実施形態
の場合には原液スラリーが層流で液層Ｌ内へ静かに注が
れるため、液層Ｌ内で遠心分離された軽液層と重液層の
乱れが少なく、周囲への影響を最小限に抑制することが
でき、遠心分離効果を高めることができ、より清澄な軽
液がシリンダー３の軽液口３４から矢印Ｃで示すように
溢流して排出され、より比重の高い重液がスクリューコ
ンベヤ４により濃縮ゾーンへ移送されてより高濃度に濃
縮されて重液口から排出される。ところが、従来構造の
スクリュー型デカンタの場合には、原液スラリーが分配
孔から液層Ｌの清澄な軽液層に直接流出し、広い範囲に
渡って軽液層と重液層を攪乱してスラリーに戻し、この
スラリーをスクリューコンベア４で重液口側へ移送する
と共に懸濁した軽液を軽液口側へ移送するので遠心分離
効果が低減する。When the tip of the liquid supply nozzle 13 is immersed in the liquid layer L, the undiluted slurry flows from the liquid supply nozzle 13 into the liquid layer L in a laminar flow, without disturbing the liquid layer L as in the prior art. It is gently supplied into the liquid layer L. As described above, in the case of the present embodiment, since the undiluted liquid slurry is gently poured into the liquid layer L in a laminar flow, the light liquid layer and the heavy liquid layer centrifuged in the liquid layer L are less disturbed, and The effect on the liquid can be minimized, the centrifugal effect can be enhanced, and the more clear light liquid overflows from the light liquid port 34 of the cylinder 3 as shown by the arrow C and is discharged. The heavy liquid having a high concentration is transferred to the concentration zone by the screw conveyor 4 to be concentrated to a higher concentration and discharged from the heavy liquid port. However, in the case of the conventional screw type decanter, the undiluted slurry directly flows out of the distribution hole into the clear light liquid layer of the liquid layer L, and disturbs the light liquid layer and the heavy liquid layer over a wide range. The slurry is transferred to the heavy liquid port side by the screw conveyor 4 and the suspended light liquid is transferred to the light liquid port side, so that the centrifugal separation effect is reduced.
【００２０】以上説明したように本実施形態によれば、
原液供給管１１の出口端にこれと同軸に先端が閉じた給
液筒１２を延設すると共に、給液筒１２にスクリュー軸
５の周壁を貫通しシリンダ３側へ原液スラリーを案内す
る給液ノズル１３を設けたため、給液ノズル１３から流
出する原液スラリーは液層Ｌ内へ層流で注ぎ込まれ、液
層Ｌの乱れを極力抑制することができ、シリンダー３に
おける遠心分離効果を高めることができる。As described above, according to the present embodiment,
At the outlet end of the stock solution supply pipe 11, a stock solution supply tube 12 having a closed end is coaxially extended, and the solution supply tube 12 penetrates the peripheral wall of the screw shaft 5 to guide the stock solution slurry to the cylinder 3 side. Since the nozzle 13 is provided, the stock slurry flowing out of the liquid supply nozzle 13 is poured into the liquid layer L by laminar flow, the turbulence of the liquid layer L can be suppressed as much as possible, and the centrifugal separation effect in the cylinder 3 can be enhanced. it can.
【００２１】また、本実施形態によれば、給液筒１２の
全周に給液ノズル１３を分散配置したため、シリンダー
３の回転速度が遅く、給液筒１２内の原液スラリーに対
する遠心力が小さくても、給液筒１２内に原液スラリー
が滞留することなく、各給液ノズル１３から連続的に安
定して流出し、原液スラリーを連続的且つ確実に軽液と
重液とに分離することができる。Further, according to the present embodiment, since the liquid supply nozzles 13 are dispersedly arranged on the entire circumference of the liquid supply cylinder 12, the rotation speed of the cylinder 3 is low, and the centrifugal force on the stock slurry in the liquid supply cylinder 12 is small. Even if the stock solution slurry does not stay in the stock tube 12, it flows out of each stock nozzle 13 continuously and stably, and the stock solution slurry is continuously and reliably separated into the light solution and the heavy solution. Can be.
【００２２】尚、本発明は上記実施形態に何等制限され
るものではなく、特に給液ノズルの個数及び長さは原液
スラリーの供給流量等に即して適宜設定することができ
る。The present invention is not limited to the above-described embodiment, and the number and length of the liquid supply nozzles can be appropriately set in accordance with the supply flow rate of the stock slurry.
【００２３】[0023]
【発明の効果】本発明の請求項１に記載の発明によれ
ば、シリンダーの内周面で形成される液層を攪乱するこ
となく原液をスクリュー軸内部からシリンダー側へ供給
し、原液の分離効率を高めて効率良く遠心分離すること
ができ、しかも、低い回転速度でも原液をスクリュー軸
内部からシリンダー側へ連続的且つ安定的に供給するこ
とができるスクリュー型デカンタを提供することができ
る。According to the first aspect of the present invention, the undiluted solution is supplied from the inside of the screw shaft to the cylinder side without disturbing the liquid layer formed on the inner peripheral surface of the cylinder. It is possible to provide a screw type decanter capable of efficiently performing centrifugal separation with high efficiency and supplying a stock solution continuously and stably from the inside of the screw shaft to the cylinder side even at a low rotation speed.
【図１】本発明のスクリュー型デカンタの一実施形態を
示す軸方向の要部縦断面図である。FIG. 1 is a longitudinal sectional view of an essential part in an axial direction showing an embodiment of a screw type decanter of the present invention.
【図２】従来のスクリュー型デカンタを示す軸方向の縦
断面図である。FIG. 2 is an axial longitudinal sectional view showing a conventional screw type decanter.
３ シリンダー ４ スクリューコンベヤ ５ スクリュー軸 １１ 原液供給管 １２ 給液筒 １３ 給液ノズル ３１ 大径端部 ３２ 小径端部 ３４ 軽液口 ３５ 重液口 Reference Signs List 3 cylinder 4 screw conveyor 5 screw shaft 11 stock solution supply pipe 12 supply cylinder 13 supply nozzle 31 large-diameter end 32 small-diameter end 34 light liquid port 35 heavy liquid port
Claims (1)
径に形成された回転シリンダーと、このシリンダーと同
軸に若干の差速をもって回転し且つ外周面にスクリュー
コンベヤが巻着された中空状のスクリュー軸と、このス
クリュー軸内に同軸に挿着された原液供給管とを備え、
上記原液供給管から供給された原液スラリーを遠心分離
して上記シリンダーの大径端部に穿設された軽液口から
軽液を排出すると共に、上記シリンダーの小径端部に穿
設された重液口から重液を排出するスクリュー型デカン
タにおいて、上記原液供給管の出口端にこれと同軸に先
端が閉じた給液筒を延設すると共に、上記給液筒に上記
スクリュー軸の周壁を貫通し上記シリンダ側の液層内へ
原液を供給する給液ノズルを設けたことを特徴とするス
クリュー型デカンタ。1. A rotary cylinder having one end formed to have a large diameter and the other end formed to have a small diameter, a screw conveyor being rotated coaxially with the cylinder at a slightly different speed, and wound around an outer peripheral surface. A hollow screw shaft and a stock solution supply pipe coaxially inserted into the screw shaft,
The undiluted solution slurry supplied from the undiluted solution supply pipe is centrifuged to discharge the light liquid from the light liquid port formed in the large-diameter end of the cylinder, and the weight formed in the small-diameter end of the cylinder. In a screw type decanter that discharges heavy liquid from the liquid port, a liquid supply cylinder having a closed end is extended coaxially with the outlet end of the stock solution supply pipe, and the peripheral wall of the screw shaft is penetrated through the liquid supply cylinder. And a liquid supply nozzle for supplying a stock solution into the liquid layer on the cylinder side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30390096A JP3884514B2 (en) | 1996-10-29 | 1996-10-29 | Screw type decanter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30390096A JP3884514B2 (en) | 1996-10-29 | 1996-10-29 | Screw type decanter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10128155A true JPH10128155A (en) | 1998-05-19 |
| JP3884514B2 JP3884514B2 (en) | 2007-02-21 |
Family
ID=17926625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30390096A Expired - Lifetime JP3884514B2 (en) | 1996-10-29 | 1996-10-29 | Screw type decanter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3884514B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009149373A3 (en) * | 2008-06-06 | 2010-03-11 | M-I L.L.C. | Dual feed centrifuge |
| JP2018143939A (en) * | 2017-03-03 | 2018-09-20 | 俊治 角野 | Centrifugal separator |
-
1996
- 1996-10-29 JP JP30390096A patent/JP3884514B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009149373A3 (en) * | 2008-06-06 | 2010-03-11 | M-I L.L.C. | Dual feed centrifuge |
| CN102186595A (en) * | 2008-06-06 | 2011-09-14 | M-I有限公司 | Dual feed centrifuge |
| EA017792B1 (en) * | 2008-06-06 | 2013-03-29 | Эм-Ай Эл. Эл. Си. | Dual feed centrifuge |
| US8961381B2 (en) | 2008-06-06 | 2015-02-24 | M-I L.L.C. | Dual feed centrifuge |
| JP2018143939A (en) * | 2017-03-03 | 2018-09-20 | 俊治 角野 | Centrifugal separator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3884514B2 (en) | 2007-02-21 |
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