JP2005074402A - Pump for solvent extraction - Google Patents

Pump for solvent extraction Download PDF

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JP2005074402A
JP2005074402A JP2003311613A JP2003311613A JP2005074402A JP 2005074402 A JP2005074402 A JP 2005074402A JP 2003311613 A JP2003311613 A JP 2003311613A JP 2003311613 A JP2003311613 A JP 2003311613A JP 2005074402 A JP2005074402 A JP 2005074402A
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solvent extraction
pump
extraction pump
aqueous solution
solvent
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Etsuki Noda
悦希 野田
Nobuhiro Matsumoto
伸弘 松本
Nobumasa Iemori
伸正 家守
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Sumitomo Metal Mining Co Ltd
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Sumitomo Metal Mining Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2250/00—Geometry
    • F04C2250/20—Geometry of the rotor
    • F04C2250/201—Geometry of the rotor conical shape

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  • Extraction Or Liquid Replacement (AREA)
  • Accessories For Mixers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Rotary Pumps (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact pump for solvent extraction having a distinct dimension range of main parts that is equivalent to a conventional pump for solvent extraction in capacities of mixing by agitation and transferring liquid to the next step. <P>SOLUTION: The pump for solvent extraction 11 having functions of mixing and agitating an organic solvent and an aqueous solution in a liquid mixture 18 as well as transferring the liquid mixture 18 to the next step in a solvent extraction apparatus 1 where an object element is separated and purified from the liquid mixture 18, comprises a spiral screw blade 13 attached to the outer periphery of a rotary shaft 15, a cylindrical casing 17 surrounding the outside of the screw blade 13 and a driving device 16 for driving the rotary shaft 15. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、混合液中の有機溶媒と水溶液との間における着目元素の分配比を利用して、目的元素の分離精製を行う溶媒抽出設備において、混合液中の有機溶媒と水溶液とを混合混合攪拌するとともに次工程へ移送する役目を担う溶媒抽出用ポンプに関する。   The present invention relates to a solvent extraction facility for separating and purifying a target element by utilizing a distribution ratio of an element of interest between an organic solvent and an aqueous solution in a mixed solution, and mixing and mixing the organic solvent and the aqueous solution in the mixed solution The present invention relates to a solvent extraction pump that performs the role of stirring and transferring to the next process.

図１は、混合液中の有機溶媒と水溶液との間における着目元素の分配比を利用して、目的元素の分離精製や不純物除去を行う一般的な溶媒抽出設備１を示している。溶媒抽出設備１は、混合槽２内で溶媒抽出用ポンプ３を有している。溶媒抽出用ポンプ３は、混合槽２内で攪拌した有機溶媒と水溶液の混合物１８を流路４の高さまでくみ上げる。くみ上げられた混合物１８は、流路４を流れて前分離され、次工程の分離槽５に移送され、分離槽５の内部でさらに分離され、上相の有機溶媒と下相の水溶液とに分かれて溜まり、別々に回収される。このように、溶媒抽出用ポンプ３は、混合液１８中の有機溶媒と水溶液とを混合撹拌し、調整された混合液１８を適当な水位までくみ上げ、次工程へ移送する装置として用いられている。   FIG. 1 shows a general solvent extraction facility 1 that performs separation and purification of a target element and removal of impurities by using a distribution ratio of a target element between an organic solvent and an aqueous solution in a mixed solution. The solvent extraction facility 1 has a solvent extraction pump 3 in the mixing tank 2. The solvent extraction pump 3 pumps up the mixture 18 of the organic solvent and the aqueous solution stirred in the mixing tank 2 to the height of the flow path 4. The pumped mixture 18 is pre-separated by flowing through the flow path 4, transferred to the separation tank 5 of the next step, further separated inside the separation tank 5, and separated into an upper-phase organic solvent and a lower-phase aqueous solution. Collected and collected separately. Thus, the solvent extraction pump 3 is used as a device for mixing and stirring the organic solvent and the aqueous solution in the mixed solution 18, pumping the adjusted mixed solution 18 to an appropriate water level, and transferring it to the next step. .

図２は、特許文献１における溶媒抽出用ポンプ３を示している。その溶媒抽出用ポンプ３は、低乱流性液体汲み上げポンプであり、垂直な回転軸８の下端に取り付けられた攪拌手段１０と、攪拌手段１０の上部にあって上下で開口し上向きに広口の円錐筒形状のケーシング６と、回転軸８に取り付けられた逆台形状の台形羽根７と、回転軸８を回転させるモータ９とを備えている。   FIG. 2 shows a solvent extraction pump 3 in Patent Document 1. The solvent extraction pump 3 is a low turbulent liquid pumping pump, and has a stirring means 10 attached to the lower end of the vertical rotating shaft 8 and a top opening of the stirring means 10 that opens up and down and has a wide opening upward. A conical cylinder-shaped casing 6, an inverted trapezoidal trapezoidal blade 7 attached to a rotating shaft 8, and a motor 9 that rotates the rotating shaft 8 are provided.

前記溶媒抽出用ポンプ３は、攪拌手段１０としての攪拌羽根により混合槽２内の混合液１８を攪拌し、かつケーシング６内で混合液１８に対して遠心力を作用させて、混合物１８を流路４まで汲み上げる。なお、ケーシング６の内径は、上にいくにつれて大きくなっているから、混合液１８に作用する遠心力も上方に向かっていくほど大きくなり、これにより溶媒抽出用ポンプ３の出口水位と混合槽２の水位とのレベル差、すなわちくみ上げ高さが確保できる。   The solvent extraction pump 3 stirs the mixed liquid 18 in the mixing tank 2 by a stirring blade as the stirring means 10 and applies a centrifugal force to the mixed liquid 18 in the casing 6 to flow the mixture 18. Pump up to Road 4. Since the inner diameter of the casing 6 increases as it goes upward, the centrifugal force acting on the mixed liquid 18 also increases as it goes upward, whereby the outlet water level of the solvent extraction pump 3 and the mixing tank 2 The level difference from the water level, that is, the pumping height can be secured.

このくみ上げ工程で、混合液１８に必要以上の攪拌が与えられないが、乱流のない円錐型の流れに対して遠心力が作用して、溶媒抽出用ポンプ３内部で、混合物１８には一定量以上の会合が生じるため、くみ上げ中に混合液１８を構成する二種類の液体、ここでは有機溶媒と水溶液とは前分離を開始する。   In this pumping process, the liquid mixture 18 is not stirred more than necessary, but centrifugal force acts on the conical flow without turbulent flow, and the mixture 18 is constant in the solvent extraction pump 3. Since more than an amount of association occurs, pre-separation of the two types of liquids, that is, the organic solvent and the aqueous solution in this case, that constitute the mixed liquid 18 starts during the pumping.

しかしながら、前記溶媒抽出用ポンプ３では、ケーシング６の形状が上向きに広口でかつ円錐台形であることから、溶媒抽出用ポンプ３は、比較的大きな装置となる。また、各部の形状についてはに定められているものの、回転軸８の台形羽根７とケーシング６とのクリアランスを始めとする装置の最適な寸法範囲についてはこれまで定められておらず、その設定が難しい。
特表２０００−５０００６２号公報 米国特許４２３５６０２号公報 However, in the solvent extraction pump 3, since the casing 6 has a wide opening and a truncated cone shape, the solvent extraction pump 3 is a relatively large device. In addition, although the shape of each part is determined, the optimum dimension range of the device including the clearance between the trapezoidal blade 7 of the rotating shaft 8 and the casing 6 has not been determined so far, and the setting is not difficult.
Special Table 2000-500062 U.S. Pat. No. 4,235,602

本発明の課題は、混合液中の有機溶媒と水溶液との間における着目元素の分配比を利用して、目的元素の分離精製を行う溶媒抽出設備において、従来の溶媒抽出用ポンプよりもコンパクトで、主要部の寸法範囲が明確で、有機溶媒と水溶液との混合攪拌能力および次工程への移送の能力の点でも従来の溶媒抽出用ポンプと同等である溶媒抽出用ポンプを提供することである。   An object of the present invention is to provide a solvent extraction facility for separating and purifying a target element by utilizing a distribution ratio of an element of interest between an organic solvent and an aqueous solution in a mixed solution, and is more compact than a conventional solvent extraction pump. The present invention is to provide a solvent extraction pump that has a clear dimensional range of the main part, and that is equivalent to a conventional solvent extraction pump in terms of mixing and stirring ability of an organic solvent and an aqueous solution and transfer ability to the next process. .

上記課題のもとに、本発明は、混合液中の有機溶媒と水溶液との間における着目元素の分配比を利用して、目的元素の分離精製を行う溶媒抽出設備において、混合液中の有機溶媒と水溶液とを混合攪拌するとともに、混合液を次工程へ移送する役目を担う溶媒抽出用ポンプであって、この溶媒抽出用ポンプは、回転軸の周りに螺旋状に取り付けたスクリュー羽根と、スクリュー羽根の外側を覆う円筒状のケーシングと、回転軸の回転用駆動装置とからなることを特徴とする（請求項１）。   Based on the above problems, the present invention provides a solvent extraction facility for separating and purifying a target element using a distribution ratio of a target element between an organic solvent and an aqueous solution in a mixed solution. The solvent extraction pump is responsible for mixing and stirring the solvent and the aqueous solution and transferring the mixed solution to the next process, and the solvent extraction pump includes a screw blade spirally attached around the rotation shaft, It comprises a cylindrical casing that covers the outside of the screw blades, and a drive device for rotating the rotary shaft (claim 1).

スクリュー羽根のピッチは、上方に向かっていくほど大きくなっており、有機溶媒と水溶液との混合液の上昇スピードが上方に向かって速くなるようにしたことを特徴とする（請求項２）。   The pitch of the screw blades increases toward the upper side, and the rising speed of the mixed liquid of the organic solvent and the aqueous solution is increased upward (Claim 2).

本発明は、回転軸の周りに螺旋状に取り付けたスクリュー羽根と、スクリュー羽根の外側を覆う円筒状のケーシングと、回転軸の回転用駆動装置とで溶媒抽出用ポンプを構成している。この構成によれば、溶媒抽出設備において、有機溶媒と水溶液の混合撹拌にて調整された前記混合液を適当な水位までくみ上げ、この出口から次工程へ移送するとき、従来技術と同等の前分離を行い、必要なくみ上げ量および汲み上げ高さを維持したまま、溶媒抽出用ポンプをコンパクトに構成することができ、しかも主要部の寸法が必要な機能の観点から容易に設定できる。   In the present invention, a solvent extraction pump is constituted by a screw blade spirally attached around a rotation shaft, a cylindrical casing that covers the outside of the screw blade, and a rotation drive device for the rotation shaft. According to this configuration, in the solvent extraction facility, when the mixed liquid prepared by mixing and stirring the organic solvent and the aqueous solution is pumped up to an appropriate water level and transferred from this outlet to the next process, a pre-separation equivalent to the conventional technique is performed. The solvent extraction pump can be configured in a compact manner while maintaining the necessary pumping amount and pumping height, and the dimensions of the main part can be easily set from the viewpoint of the required function.

図３は、本発明の溶媒抽出用ポンプ１１を示している。本発明の溶媒抽出用ポンプ１１は、図１と同様に、混合液１８中の有機溶媒と水溶液との間における着目元素の分配比を利用して、目的元素の分離精製を行う溶媒抽出設備１に組み込まれ、混合液１８中の有機溶媒と水溶液とを混合攪拌するとともに、混合液１８を次工程へ移送する役目を担う。   FIG. 3 shows the solvent extraction pump 11 of the present invention. As in FIG. 1, the solvent extraction pump 11 of the present invention uses the distribution ratio of the element of interest between the organic solvent in the mixed solution 18 and the aqueous solution to perform the solvent extraction facility 1 that separates and purifies the target element. The organic solvent and the aqueous solution in the mixed solution 18 are mixed and stirred, and the mixed solution 18 is transferred to the next step.

溶媒抽出用ポンプ１１は、回転軸１５の周りに螺旋状に取り付けたスクリュー羽根１３と、スクリュー羽根１３の外側を覆う円筒状のケーシング１７と、回転軸１５を回転させるモータなどの回転用駆動装置１６とから構成されている。なお、スクリュー羽根１３、攪拌羽根１４およびこれらに共通な回転軸１５は、回転子１２を構成している。   The solvent extraction pump 11 includes a screw blade 13 spirally mounted around a rotation shaft 15, a cylindrical casing 17 that covers the outside of the screw blade 13, and a rotation drive device such as a motor that rotates the rotation shaft 15. 16. Note that the screw blade 13, the stirring blade 14, and the rotation shaft 15 common to them constitute the rotor 12.

スクリュー羽根１３のピッチは、所定ピッチ値の範囲での等ピッチでもよいが、回転軸１５にそって上方に向かっていくほど大きくなっている。この構成は、溶媒抽出用ポンプ１１において、有機溶媒と水溶液との混合液１８の上昇スピードを上方に向かって速くすることによって、必要なくみ上げ量および汲み上げ高さを確保するために有効である。   The pitch of the screw blades 13 may be an equal pitch within a range of a predetermined pitch value, but increases as it goes upward along the rotary shaft 15. This configuration is effective in securing the necessary pumping amount and pumping height by increasing the rising speed of the mixed liquid 18 of the organic solvent and the aqueous solution upward in the solvent extraction pump 11.

モータなどの回転用駆動装置１６が回転軸１５を上から見て時計方向に回転させると、攪拌羽根１４は、混合槽２中の混合液１８を攪拌し、その上の螺旋状のスクリュー羽根１３は、混合液１８中の有機溶媒と水溶液とを前分離しながら、必要な汲み上げ量のもとにポンプ出口の高さまで汲み上げる。   When the rotation driving device 16 such as a motor rotates the rotating shaft 15 in the clockwise direction when viewed from above, the stirring blade 14 stirs the mixed liquid 18 in the mixing tank 2 and the spiral screw blade 13 on the stirring blade 14. Pumps up to the height of the pump outlet based on the required pumping amount while pre-separating the organic solvent and the aqueous solution in the mixed solution 18.

特許出願人は、図３の本発明の溶媒抽出用ポンプ１１を用い、主要部の寸法や寸法範囲を明確に設定しながら、混合液１８中の有機溶媒と水溶液との混合攪拌、および混合液１８のくみ上げの試験を行った。この試験に当たって、スクリュー羽根１３の外径をｄ、ケーシング１７内径をＤ、スクリュー羽根１３とケーシング１７とのクリアランスをａ、スクリュー羽根１３のピッチをＰとおき、ｄ＝４２０ｍｍ、Ｄ＝４２６ｍｍ、最大Ｐ＝２８３ｍｍ、Ｐ／ｄ＝０．３３〜０．６７、回転子１２の回転数３９７ｒｐｍとなるように調整し、またケーシング１７の長さを１１３２ｍｍ、混合槽２内の水位を槽底から８４０ｍｍ、くみ上げ高さを混合槽２の水面から８７２ｍｍとなるように調整した。このように主要部の寸法は、必要な機能の観点から容易に設定できる。なお、主要部の寸法の範囲は、ａ≦３ｍｍ、Ｐ／ｄ＝０．１〜２．０、また回転子１２の回転数は、５０〜５００ｒｐｍ程度が好ましい。   The patent applicant uses the solvent extraction pump 11 of the present invention shown in FIG. 3 while mixing and stirring the organic solvent and the aqueous solution in the mixed solution 18 while clearly setting the dimensions and size range of the main part. Eighteen pumping tests were performed. In this test, the outer diameter of the screw blade 13 is d, the inner diameter of the casing 17 is D, the clearance between the screw blade 13 and the casing 17 is a, the pitch of the screw blade 13 is P, d = 420 mm, D = 426 mm, maximum P = 283 mm, P / d = 0.33 to 0.67, adjusted so that the rotational speed of the rotor 12 is 397 rpm, the length of the casing 17 is 1132 mm, and the water level in the mixing tank 2 is 840 mm from the bottom of the tank The pumping height was adjusted to 872 mm from the water surface of the mixing tank 2. In this way, the dimensions of the main part can be easily set from the viewpoint of necessary functions. In addition, the range of the dimension of the main part is preferably a ≦ 3 mm, P / d = 0.1 to 2.0, and the rotation speed of the rotor 12 is preferably about 50 to 500 rpm.

試験の結果によると、本実施例での溶媒抽出用ポンプ１１でのくみ上げ高さ（ポンプ出口水位と混合槽の水位とのレベル差）は、８７２ｍｍとなり、くみ上げ量は、３５４リットル／分を得られた。そして、本実施例での溶媒抽出用ポンプ１１でのくみ上げは、乱流のない上昇流にて行われていた。このくみ上げ中に内部で混合液１８の分離が開始していることが確認できた。   According to the test results, the pumping height (level difference between the pump outlet water level and the mixing tank water level) in the solvent extraction pump 11 in this example is 872 mm, and the pumping amount is 354 liters / min. It was. And the pumping-up by the solvent extraction pump 11 in the present embodiment was performed in an upflow without turbulent flow. During the pumping up, it was confirmed that the separation of the mixed liquid 18 started inside.

比較例Comparative example

従来の技術による図２の溶媒抽出用ポンプ３、すなわち拌攪手段１０の上部に上向きに広口でかつ円錐台形のケーシング６および台形羽根７を有する回転子８により構成される溶媒抽出用ポンプ３を用い、本発明による実施例の溶媒抽出用ポンプ１１と同等のくみ上げ能力（３５４リットル／分）とする試験を行った。ここで、本実施例の溶媒抽出用ポンプ１１と同様に、ケーシング長さは１１３２ｍｍ、混合槽２内の水位は槽底から８４０ｍｍ、汲み上げ高さは混合槽２の水面から８７２ｍｍとなるよう調整した。   The solvent extraction pump 3 of FIG. 2 according to the prior art, that is, the solvent extraction pump 3 constituted by a rotor 8 having a wide-mouthed and frustoconical casing 6 and a trapezoidal blade 7 on the upper part of the stirring means 10. The test was carried out to make the pumping capacity (354 liters / min) equivalent to the solvent extraction pump 11 of the example according to the present invention. Here, as with the solvent extraction pump 11 of this example, the casing length was adjusted to 1132 mm, the water level in the mixing tank 2 was adjusted to 840 mm from the tank bottom, and the pumping height was adjusted to 872 mm from the water surface of the mixing tank 2. .

このときの図２の溶媒抽出用ポンプ３での回転子８の回転数は１６７ｒｐｍ、各部の寸法は、ケーシング６の下部内径３２４ｍｍ、ケーシング６の上部内径８６０ｍｍと大型のものとなった。このことから、本発明の溶媒抽出用ポンプ１１の大きさの観点からの優位性が確認できた。   At this time, the rotational speed of the rotor 8 in the solvent extraction pump 3 of FIG. 2 was 167 rpm, and the dimensions of each part were large, such as the lower inner diameter of the casing 6 324 mm and the upper inner diameter of the casing 6 860 mm. From this, the superiority from the viewpoint of the size of the solvent extraction pump 11 of the present invention could be confirmed.

本発明は、混合液中の有機溶媒と水溶液との間における着目元素の分配比を利用して、目的元素の分離精製を行う溶媒抽出設備であれば、混合液中のあらゆる有機溶媒や水溶液に利用できる。   The present invention can be applied to any organic solvent or aqueous solution in the mixed solution as long as it is a solvent extraction facility that performs separation and purification of the target element using the distribution ratio of the element of interest between the organic solvent and the aqueous solution in the mixed solution. Available.

溶媒抽出設備の概略的な系統図である。It is a schematic systematic diagram of solvent extraction equipment. 従来技術の溶媒抽出用ポンプの要部の断面図である。It is sectional drawing of the principal part of the pump for solvent extraction of a prior art. 本発明の溶媒抽出用ポンプの要部の断面図である。It is sectional drawing of the principal part of the pump for solvent extraction of this invention.

符号の説明Explanation of symbols

１ 溶媒抽出設備
２ 混合槽
３ 溶媒抽出用ポンプ
４ 流路
５ 分離槽
６ ケーシング
７ 台形羽根
８ 回転軸
９ モータ
１０ 攪拌手段
１１ 溶媒抽出用ポンプ
１２ 回転子
１３ スクリュー羽根
１４ 攪拌羽根
１５ 回転軸
１６ 回転用駆動装置
１７ ケーシング
１８ 混合液 DESCRIPTION OF SYMBOLS 1 Solvent extraction equipment 2 Mixing tank 3 Solvent extraction pump 4 Flow path 5 Separation tank 6 Casing 7 Trapezoid blade 8 Rotating shaft 9 Motor 10 Stirring means 11 Solvent extracting pump 12 Rotor 13 Screw blade 14 Stirring blade 15 Rotating shaft 16 Rotation Drive device 17 casing 18 liquid mixture

Claims (2)

混合液（１８）中の有機溶媒と水溶液との間における着目元素の分配比を利用して、目的元素の分離精製を行う溶媒抽出設備（１）において、混合液（１８）中の有機溶媒と水溶液とを混合攪拌するとともに次工程へ移送する役目を担う溶媒抽出用ポンプ（１１）であって、
前記溶媒抽出用ポンプ（１１）は、回転軸（１５）の周りに螺旋状に取り付けたスクリュー羽根（１３）と、スクリュー羽根（１３）の外側を覆う円筒状のケーシング（１７）と、回転軸（１５）の回転用駆動装置（１６）とからなることを特徴とする溶媒抽出用ポンプ（１１）。 In the solvent extraction facility (1) for separating and purifying the target element using the distribution ratio of the element of interest between the organic solvent in the liquid mixture (18) and the aqueous solution, the organic solvent in the liquid mixture (18) A solvent extraction pump (11) responsible for mixing and stirring the aqueous solution and transferring it to the next step,
The solvent extraction pump (11) includes a screw blade (13) helically attached around a rotation shaft (15), a cylindrical casing (17) covering the outside of the screw blade (13), and a rotation shaft. A solvent extraction pump (11) comprising the rotation drive device (16) of (15). スクリュー羽根（１３）のピッチは、上方に向かっていくほど大きくなっており、有機溶媒と水溶液との混合液（１８）の上昇スピードが上方に向かって速くなるようにしたことを特徴とする請求項１記載の溶媒抽出用ポンプ（１１）。   The pitch of the screw blades (13) increases toward the upper side, and the rising speed of the mixed liquid (18) of the organic solvent and the aqueous solution is increased upward. Item 12. The solvent extraction pump (11) according to Item 1.
JP2003311613A 2003-09-03 2003-09-03 Pump for solvent extraction Pending JP2005074402A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014036925A (en) * 2012-08-15 2014-02-27 Denki Kagaku Kogyo Kk Agitator and manufacturing method of small size plate member
JP2018521838A (en) * 2015-06-04 2018-08-09 テクニップ フランス Equipment for mixing / separating immiscible liquids
CN116999901A (en) * 2023-10-07 2023-11-07 山东中科医药科技有限公司 Extraction device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014036925A (en) * 2012-08-15 2014-02-27 Denki Kagaku Kogyo Kk Agitator and manufacturing method of small size plate member
JP2018521838A (en) * 2015-06-04 2018-08-09 テクニップ フランス Equipment for mixing / separating immiscible liquids
CN116999901A (en) * 2023-10-07 2023-11-07 山东中科医药科技有限公司 Extraction device
CN116999901B (en) * 2023-10-07 2023-12-01 山东中科医药科技有限公司 Extraction device

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