JP5875614B2

JP5875614B2 - Emulsion demulsification device and demulsification method

Info

Publication number: JP5875614B2
Application number: JP2014045664A
Authority: JP
Inventors: 恵一神原; 浩智櫻田
Original assignee: 関西オートメ機器株式会社
Priority date: 2014-02-19
Filing date: 2014-02-19
Publication date: 2016-03-02
Anticipated expiration: 2034-02-19
Also published as: JP2015155092A

Description

本発明は、例えば洗浄液と油が混ざり合ったエマルジョン（乳化液）を洗浄液と油に分離する場合等に用いることができるエマルジョン解乳化装置及び解乳化方法に関するものである。 The present invention relates to an emulsion demulsifying apparatus and a demulsifying method that can be used when, for example, an emulsion (emulsified liquid) in which a cleaning liquid and oil are mixed is separated into a cleaning liquid and oil.

金属の板等を曲げ加工したり、切削加工したりして製品を作る過程で製品に付着している油を取り除くために、洗浄槽に製品を入れて、洗浄液を流動させて、製品を洗浄することが行われる。製品の洗浄が繰り返されると、洗浄液と油が混ざり合ってエマルジョン化し、洗浄液としての能力が劣化してくる。 Or by bending a metal plate or the like, and interest was machined to remove oil adhering to the product in the process of making the product, putting the product into the cleaning tank, by flow of cleaning fluid, the product Washing is done. When the product is repeatedly washed, the washing liquid and oil mix to become an emulsion, and the ability as a washing liquid deteriorates.

廃液からの浮上油回収方法及び装置として、特開２００７−３８１９５号公報（特許文献１）に示されるように、エマルジョン化したものを含め油を中心とする異物を含んだ廃液にマイクロバブルを送り込み、マイクロバブルが水面に上昇するまでの間にマイクロバブルの表面に油を中心とする異物を付着させて浮上油とし、この浮上油を回収することが知られている。 As a method and apparatus for recovering floating oil from waste liquid, as shown in Japanese Patent Application Laid-Open No. 2007-38195 (Patent Document 1), microbubbles are fed into waste liquid containing foreign matters, mainly oil, including emulsion. It has been known that foreign matter, mainly oil, adheres to the surface of the microbubble until the microbubble rises to the surface of the water to make it floating oil, and this floating oil is recovered.

特開２００７−３８１９５号公報 JP 2007-38195 A

上記特許文献１に記載のものは、廃液からの浮上油回収方法及び装置であり、油を回収するためにマイクロバブルを利用しているが、エマルジョンを解乳化することに関する記載はない。
本発明は、例えば洗浄液と油が混ざり合ったエマルジョン（乳化液）を油と洗浄液に連続的に且つ効率的に分離することができるエマルジョン解乳化装置及び解乳化方法を提供することを目的とする。The one described in Patent Document 1 is a method and apparatus for recovering floating oil from waste liquid and uses microbubbles to recover the oil, but there is no description about demulsifying the emulsion.
An object of the present invention is to provide an emulsion demulsification apparatus and a demulsification method capable of continuously and efficiently separating, for example, an emulsion (emulsion liquid) in which a cleaning liquid and an oil are mixed into an oil and a cleaning liquid. .

本発明のエマルジョン解乳化装置は、槽と、この槽内に設置されたマイクロバブル発生体と、外部に存在するエマルジョンを含む液又は前記槽内の液或いはその両方を前記マイクロバブル発生体に供給する液供給装置と、前記マイクロバブル発生体に空気等のガス体を供給するガス供給装置とを備え、前記マイクロバブル発生体を旋回剪断型のマイクロバブル発生体とし、さらに、前記マイクロバブル発生体を円筒体とし、前記マイクロバブル発生体を一対設け、前記一対のマイクロバブル発生体の先端を対向状態で近接して設置し、前記液供給装置と前記ガス供給装置とから供給された液とガスとを前記円筒体内で高速旋回流とし、前記円筒体の先端部内壁に前記旋回流が通って来た通路の径を部分的に拡大した径拡大部を設け、当該マイクロバブル発生体からマイクロバブルが発生するときの剪断力によって前記マイクロバブル発生体の出口付近で前記マイクロバブル発生体に供給された液中のエマルジョンを解乳化し、相互に親和性のない少なくとも２種類の液に分離することを特徴とする。 The emulsion demulsification apparatus of the present invention supplies a tank, a microbubble generator installed in the tank, a liquid containing an emulsion existing outside, a liquid in the tank, or both to the microbubble generator. And a gas supply device that supplies a gas body such as air to the microbubble generator, wherein the microbubble generator is a swirling shear type microbubble generator, and the microbubble generator The liquid and gas supplied from the liquid supply device and the gas supply device are provided with a pair of microbubble generators, the tips of the pair of microbubble generators are placed close to each other in an opposed state. A high-speed swirling flow in the cylindrical body, and a diameter-enlarging portion that partially enlarges the diameter of the passage through which the swirling flow has passed is provided on the inner wall of the tip of the cylindrical body. At least two types having no affinity to each other by demulsifying the emulsion in the liquid supplied to the microbubble generator near the outlet of the microbubble generator by the shearing force when microbubbles are generated from the bubble generator It is characterized by being separated into a liquid.

また、本発明のエマルジョン解乳化装置は、槽と、この槽内に設置されたマイクロバブル発生体と、外部に存在するエマルジョンを含む液又は前記槽内の液或いはその両方を前記マイクロバブル発生体に供給する液供給装置と、前記マイクロバブル発生体に空気等のガス体を供給するガス供給装置とを備え、前記マイクロバブル発生体を旋回剪断型のマイクロバブル発生体とし、さらに、前記マイクロバブル発生体を円筒体とし、前記マイクロバブル発生体を一対設け、前記一対のマイクロバブル発生体の先端を対向状態で近接して設置し、前記液供給装置と前記ガス供給装置とから供給された液とガスとを前記円筒体内で高速旋回流とし、前記円筒体の出口に、この出口の径を部分的に拡大した径拡大部を設けたリングを取付け、当該マイクロバブル発生体からマイクロバブルが発生するときの剪断力によって前記マイクロバブル発生体の出口付近で前記マイクロバブル発生体に供給された液中のエマルジョンを解乳化し、相互に親和性のない少なくとも２種類の液に分離することを特徴とする。 Further, the emulsion demulsifying device of the present invention comprises a tank, a microbubble generator installed in the tank, a liquid containing an emulsion existing outside, a liquid in the tank, or both, and the microbubble generator. And a gas supply device for supplying a gas body such as air to the microbubble generator, wherein the microbubble generator is a swirling shear type microbubble generator, and the microbubble A liquid is supplied from the liquid supply device and the gas supply device, wherein the generator is a cylindrical body, a pair of the microbubble generators are provided, and the tips of the pair of microbubble generators are placed close to each other in an opposing state. And a gas having a high-speed swirling flow in the cylindrical body, and a ring provided with a diameter-enlarged portion that partially enlarges the diameter of the outlet is attached to the outlet of the cylindrical body. At least two types having no affinity to each other by demulsifying the emulsion in the liquid supplied to the microbubble generator near the outlet of the microbubble generator by the shearing force when microbubbles are generated from the bubble generator It is characterized by being separated into a liquid.

また、前記円筒体の内部の径を途中から先端に行くほど小さくしたことを特徴とする。 Also, characterized by being reduced toward the leading end from the middle of the diameter of the interior of the cylindrical body.

また、本発明の洗浄液再生装置は、槽と、この槽内に設置されたマイクロバブル発生体と、外部に存在する油と洗浄液とによるエマルジョンを含む製品洗浄後の廃液又は前記槽内の液或いはその両方を前記マイクロバブル発生体に供給する液供給装置と、前記マイクロバブル発生体に空気等のガス体を供給するガス供給装置とを備え、前記マイクロバブル発生体を旋回剪断型のマイクロバブル発生体とし、さらに、前記マイクロバブル発生体を円筒体とし、前記マイクロバブル発生体を一対設け、前記一対のマイクロバブル発生体の先端を対向状態で近接して設置し、前記液供給装置と前記ガス供給装置とから供給された液とガスとを前記円筒体内で高速旋回流とし、前記円筒体の先端部内壁に前記旋回流が通って来た通路の径を部分的に拡大した径拡大部を設け、当該マイクロバブル発生体からマイクロバブルが発生するときの剪断力によって前記マイクロバブル発生体の出口付近で前記マイクロバブル発生体に供給された液中のエマルジョンを解乳化し、分離された油を発生したマイクロバブルとともに浮上させて除去し、残りの液を洗浄液として再生することを特徴とする。
また、本発明の洗浄液再生装置は、槽と、この槽内に設置されたマイクロバブル発生体と、外部に存在する油と洗浄液とによるエマルジョンを含む製品洗浄後の廃液又は前記槽内の液或いはその両方を前記マイクロバブル発生体に供給する液供給装置と、前記マイクロバブル発生体に空気等のガス体を供給するガス供給装置とを備え、前記マイクロバブル発生体を旋回剪断型のマイクロバブル発生体とし、さらに、前記マイクロバブル発生体を円筒体とし、前記マイクロバブル発生体を一対設け、前記一対のマイクロバブル発生体の先端を対向状態で近接して設置し、前記液供給装置と前記ガス供給装置とから供給された液とガスとを前記円筒体内で高速旋回流とし、前記円筒体の出口に、この出口の径を部分的に拡大した径拡大部を設けたリングを取付け、当該マイクロバブル発生体からマイクロバブルが発生するときの剪断力によって前記マイクロバブル発生体の出口付近で前記マイクロバブル発生体に供給された液中のエマルジョンを解乳化し、分離された油を発生したマイクロバブルとともに浮上させて除去し、残りの液を洗浄液として再生することを特徴とする。 Further, the cleaning liquid regenerating apparatus of the present invention comprises a tank, a microbubble generator installed in the tank, a waste liquid after product cleaning containing an emulsion of oil and cleaning liquid existing outside, a liquid in the tank or A liquid supply device that supplies both of them to the microbubble generator; and a gas supply device that supplies a gas body such as air to the microbubble generator. The microbubble generator is a cylindrical body, a pair of the microbubble generators are provided, and the ends of the pair of microbubble generators are placed close to each other in an opposing state, and the liquid supply device and the gas The liquid and gas supplied from the supply device are converted into a high-speed swirling flow in the cylindrical body, and the diameter of the passage through which the swirling flow has passed through the inner wall of the tip of the cylindrical body is partially expanded. Providing a diameter-enlarged portion, and demulsifying the emulsion in the liquid supplied to the microbubble generator near the outlet of the microbubble generator by the shearing force when microbubbles are generated from the microbubble generator, The separated oil is floated and removed together with the generated microbubbles, and the remaining liquid is regenerated as a cleaning liquid.
Further, the cleaning liquid regenerating apparatus of the present invention comprises a tank, a microbubble generator installed in the tank, a waste liquid after product cleaning containing an emulsion of oil and cleaning liquid existing outside, a liquid in the tank or A liquid supply device that supplies both of them to the microbubble generator; and a gas supply device that supplies a gas body such as air to the microbubble generator. The microbubble generator is a cylindrical body, a pair of the microbubble generators are provided, and the ends of the pair of microbubble generators are placed close to each other in an opposing state, and the liquid supply device and the gas The liquid and the gas supplied from the supply device are turned into a high-speed swirl flow in the cylindrical body, and a diameter enlarged portion in which the diameter of the outlet is partially enlarged is provided at the outlet of the cylindrical body. Attached to the microbubble generator, the emulsion in the liquid supplied to the microbubble generator near the outlet of the microbubble generator by the shearing force when microbubbles are generated from the microbubble generator, and separated. The oil is floated and removed together with the generated microbubbles, and the remaining liquid is regenerated as a cleaning liquid.

また、本発明のエマルジョン解乳化方法は、旋回剪断型のマイクロバブル発生体を円筒体とし、前記マイクロバブル発生体を一対設け、前記一対のマイクロバブル発生体の先端を対向状態で近接して設置し、供給された液とガスとを前記円筒体内で高速旋回流とし、前記円筒体の先端部に前記旋回流が通って来た通路の径を部分的に拡大した径拡大部を設け、前記マイクロバブル発生体に供給された液は相互に親和性のない少なくとも２種類の液により構成されているエマルジョンを含み、マイクロバブル発生時に生じる剪断力によって前記マイクロバブル発生体に供給された液中のエマルジョンを前記マイクロバブル発生体の出口付近で解乳化することを特徴とする。 In the emulsion demulsification method of the present invention, the swirl shear type microbubble generator is a cylindrical body, a pair of the microbubble generators are provided, and the tips of the pair of microbubble generators are placed close to each other in an opposing state. And the liquid and gas supplied are set to be a high-speed swirl flow in the cylindrical body, and a diameter-enlarged portion that partially enlarges the diameter of the passage through which the swirl flow has passed is provided at the tip of the cylindrical body, The liquid supplied to the microbubble generator contains an emulsion composed of at least two kinds of liquids having no affinity for each other, and the liquid in the liquid supplied to the microbubble generator is generated by a shearing force generated when the microbubbles are generated. The emulsion is demulsified in the vicinity of the outlet of the microbubble generator .

また、本発明の洗浄液再生方法は、旋回剪断型のマイクロバブル発生体を円筒体とし、前記マイクロバブル発生体を一対設け、前記一対のマイクロバブル発生体の先端を対向状態で近接して設置し、供給された液とガスとを前記円筒体内で高速旋回流とし、前記円筒体の先端部に前記旋回流が通って来た通路の径を部分的に拡大した径拡大部を設け、前記マイクロバブル発生体に供給された液は少なくとも洗浄液と油とで構成されているエマルジョンを含み、マイクロバブル発生時に生じる剪断力によって前記マイクロバブル発生体に供給された液中のエマルジョンを前記マイクロバブル発生体の出口付近で解乳化し、前記油を除去して洗浄液を再生することを特徴とする。 Further, in the cleaning liquid regeneration method of the present invention, the swirl shear type microbubble generator is a cylindrical body, a pair of the microbubble generators are provided, and the tips of the pair of microbubble generators are placed close to each other in an opposed state. The supplied liquid and gas are turned into a high-speed swirling flow in the cylindrical body, and a diameter-enlarging portion is provided at a tip portion of the cylindrical body to partially enlarge the diameter of the passage through which the swirling flow has passed. The liquid supplied to the bubble generator includes an emulsion composed of at least a cleaning liquid and oil, and the emulsion in the liquid supplied to the microbubble generator is generated by the shearing force generated when microbubbles are generated. The emulsion is de-emulsified in the vicinity of the outlet, and the cleaning liquid is regenerated by removing the oil.

以上のように、本発明のエマルジョンの解乳化装置及び解乳化方法によればマイクロバブル発生体内で発生していた旋回流に急ブレーキがかけられることにより、マイクロバブル発生時に大きな剪断力が生じ、エマルジョン中の相互に親和性のない少なくとも２種類の液体が引き離され連続して、しかも効率よく解乳状態とすることができる。 As described above, by the sudden braking is applied to the swirling flow which occurs in the microbubble generating body according to the demulsification apparatus and demulsification method of the emulsion of the present invention, large pruning shear force when the microbubble generation occurs In this way, at least two kinds of liquids having no affinity for each other in the emulsion can be separated and continuously, and the milk can be released efficiently.

また、本発明の解乳化装置、解乳化方法を用いると廃液中のエマルジョンを解乳化することができ、その結果廃液を洗浄液として再利用することができ洗浄剤の再生装置、再生方法を提供することができる。 In addition, when the demulsification apparatus and the demulsification method of the present invention are used, the emulsion in the waste liquid can be de-emulsified, and as a result, the waste liquid can be reused as a cleaning liquid, and a cleaning agent regeneration apparatus and a regeneration method are provided. be able to.

本発明の実施の形態に係るエマルジョン解乳化装置の原理図である。 1 is a principle diagram of an emulsion demulsifying apparatus according to an embodiment of the present invention. 同エマルジョン解乳化装置に用いるマイクロバブル発生体の断側面図である。 It is a sectional side view of the microbubble generating body used for the emulsion demulsification device. 同マイクロバブル発生体の正面図である。 It is a front view of the microbubble generating body. 同エマルジョン解乳化装置の一部分の断側面図である。 It is a section side view of a part of the emulsion demulsification device. 同エマルジョン解乳化装置の一部分の断側面図である。 It is a section side view of a part of the emulsion demulsification device. 同マイクロバブル発生体説明のための原理図である。 It is a principle figure for description of the microbubble generating body. 同マイクロバブル発生体説明のための図である。 It is a figure for description of the same microbubble generating body. 同マイクロバブル発生体の他の実施形態の断側面図である。 It is a sectional side view of other embodiments of the microbubble generating object. 図８のＣ−Ｃ’断面図である。 It is C-C 'sectional drawing of FIG. 同マイクロバブル発生体のさらに他の実施形態の断側面図である。 It is a cutaway side view of further another embodiment of the microbubble generating body. 図１０のマイクロバブル発生体の一部分正面図である。 It is a partial front view of the microbubble generator of FIG. 同マイクロバブル発生体のさらに他の実施形態の断側面図である。 It is a cutaway side view of further another embodiment of the microbubble generating body.

以下、本発明の実施の形態について図面とともに説明する。
図１に於いて、１はエマルジョン解乳化装置の槽である。この槽は仕切り壁２ａ，２ｂにより三個の部屋３ａ，３ｂ，３ｃに分離されている。部屋３ａ，３ｂ，３ｃは完全に分離されておらず、部屋３ａと３ｂは上方で，部屋３ｂと３ｃは下方で繋がっている。部屋３ａの下方にはマイクロバブル発生体４が設置されている。このマイクロバブル発生体４にはエアーポンプ５から空気５ａが供給されている。実施例では空気を用いたが窒素ガスなどの気体を用いてもよい。Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, 1 is a tank of an emulsion demulsifier. This tank is divided into three rooms 3a, 3b, 3c by partition walls 2a, 2b. The rooms 3a, 3b, 3c are not completely separated, the rooms 3a and 3b are connected at the upper side, and the rooms 3b and 3c are connected at the lower side. A microbubble generator 4 is installed below the room 3a. The microbubble generator 4 is supplied with air 5 a from an air pump 5. In the embodiment, air is used, but a gas such as nitrogen gas may be used.

マイクロバブル発生体４にはさらに、槽６に貯められた廃液７がポンプ８を介して供給されている。廃液７は洗浄液で加工された製品を洗浄した液であり基本的には洗浄液（水と界面活性剤を含む）と油できたエマルジョンを含んでおり、このエマルジョンが増加してくると洗浄液としての効果が劣化する。
同時に部屋３ｃに設置された取出口９から槽１の液１０がポンプ１１で吸い出されマイクロバブル発生体４に供給されている。この液２１の供給は廃液７と液１０の両方、廃液７のみ、液１０のみの三通りが考えられる。図１はエマルジョンを解乳化し、相互に親和性のない少なくとも２種類の液Ａ，Ｂに分離した状態を示している。例えば液Ａは油、液Ｂは洗浄液であるが、液Ｂは完全に洗浄液だけではなく、油を含んだエマルジョンを含んでいる。The microbubble generator 4 is further supplied with a waste liquid 7 stored in a tank 6 via a pump 8. The waste liquid 7 is a liquid obtained by cleaning a product processed with the cleaning liquid, and basically includes a cleaning liquid (including water and a surfactant) and an oily emulsion, and when this emulsion increases, The effect is degraded.
At the same time, the liquid 10 in the tank 1 is sucked out by the pump 11 from the outlet 9 installed in the room 3 c and supplied to the microbubble generator 4. The liquid 21 can be supplied in three ways: both the waste liquid 7 and the liquid 10, only the waste liquid 7, and only the liquid 10. FIG. 1 shows a state where the emulsion is de-emulsified and separated into at least two liquids A and B having no affinity for each other. For example, the liquid A is an oil and the liquid B is a cleaning liquid, but the liquid B contains not only the cleaning liquid but also an emulsion containing oil.

液Ａは液Ｂよりも比重が軽いので上方に位置する。この液Ａは壁２ａの上を越えて部屋３ａから部屋３ｂに入る。そして、取出口１２ａから外部に取出される。取出された液Ａは槽１３に貯められる。また、部屋３ｃにも取出口１２ｂが設けられ、ここから取出された液Ｂは槽１４に貯められる。取出口１２ａ，１２ｂは図４、図５に示すように取出口１２ａ，１２ｂは液Ａ，液Ｂがオーバーフローするように構成されている。液の取出手段は他の手段でも良い。槽１で減少した液は廃液７が供給されていることで補われる。 Since liquid A has a lower specific gravity than liquid B, liquid A is positioned above. This liquid A passes over the wall 2a and enters the room 3b from the room 3a. And it is taken out from the take-out port 12a. The extracted liquid A is stored in the tank 13. The room 3c is also provided with an outlet 12b, and the liquid B taken out therefrom is stored in the tank 14. As shown in FIGS. 4 and 5, the outlets 12a and 12b are configured such that the liquids A and B overflow the outlets 12a and 12b. Other means may be used as the liquid take-out means. The liquid reduced in the tank 1 is compensated by the waste liquid 7 being supplied.

次に、マイクロバブル発生体４について説明する。
マイクロバブルを発生させる手段として一般的に知られている方式として加圧圧縮方式と旋回剪断方式がある。本発明はマイクロバブル発生体４として旋回剪断方式を用いていることに特徴がある。
この実施例では気液二相流旋回剪断方式を用いている。図２にマイクロバブル発生体４の構造を示す。円筒体１５が設けられ、その内壁面に沿うように廃液７と液１０（両方合わせて液２１）が供給口１６より供給される。円筒体１５は途中から先端に行くほど径が小さくなっている。そして、先端部１７は通路の径が大きくなっている部分（径拡大部）を含む複雑な形状になっている。例えば図３に示すよう構成されている。円筒体１５の後端部には空気２０の供給口１８が設けられている。 Next, the microbubble generator 4 will be described.
There are a pressure compression method and a swirl shear method as methods generally known as means for generating microbubbles. The present invention is characterized in that the swirl shear method is used as the microbubble generator 4.
In this embodiment, a gas-liquid two-phase swirl shear method is used. FIG. 2 shows the structure of the microbubble generator 4. A cylindrical body 15 is provided, and the waste liquid 7 and the liquid 10 (both liquid 21 together) are supplied from the supply port 16 along the inner wall surface. The diameter of the cylindrical body 15 decreases from the middle toward the tip. And the front-end | tip part 17 has a complicated shape including the part (diameter enlarged part) where the diameter of the channel | path is large. For example, it is configured as shown in FIG. A supply port 18 for air 20 is provided at the rear end of the cylindrical body 15.

供給口１６より入った液２１は円筒体１５の内壁面に沿って旋回し、図６に示すように高速の旋回流１９となる。円筒体１５の内径は途中から先端に行くほど径が小さくなっているので、旋回流１９は円筒体１５の先端に行くほど高速になる。そして遠心力により、円筒体１５の円筒中心部に負圧が発生する。図７に示すように供給口１８から供給された空気２０は主にこの円筒中心部を通過する。円筒体１５の内壁近くは、液２１の中の主に水２２が通過し、この水２２と円筒中心部を通過する空気２０の間を水２２と廃液７中の油とのエマルジョン２３が通過する。旋回流１９を作る手段は、上述のように液２１を円筒体１５の内壁面に沿って供給する手段と、円筒体１５の後部（液２１を供給する方）に捩じれた仕切板を設けて、この仕切板で旋回流を作る手段がある。 The liquid 21 entering from the supply port 16 swirls along the inner wall surface of the cylindrical body 15 and becomes a high-speed swirling flow 19 as shown in FIG. Since the inner diameter of the cylindrical body 15 decreases from the middle toward the tip, the swirling flow 19 becomes faster as it goes to the tip of the cylindrical body 15. Then, a negative pressure is generated in the central part of the cylindrical body 15 by the centrifugal force. As shown in FIG. 7, the air 20 supplied from the supply port 18 mainly passes through the central part of the cylinder. Near the inner wall of the cylindrical body 15, mainly water 22 in the liquid 21 passes, and an emulsion 23 of the water 22 and oil in the waste liquid 7 passes between the water 22 and the air 20 passing through the center of the cylinder. To do. The means for creating the swirl flow 19 includes means for supplying the liquid 21 along the inner wall surface of the cylindrical body 15 as described above, and a partition plate twisted at the rear part (the one for supplying the liquid 21) of the cylindrical body 15. There is a means to make a swirl flow with this partition plate.

つまり、比重の軽いものが、円筒中心部に集まり、竜巻状の旋回流１９が形成される。旋回流は円筒体１５の先端部１７に移動する。この先端部１７は内径が大きくなっている部分を含んでいるため、ここで旋回流１９の旋回速度が急速に低下する。この状態で旋回流１９は円筒体１５の先端から噴出されるが、このとき円筒体１５の先端周囲の液１０により、回転速度はさらに減衰する。このため、円筒体１５内部の旋回流１９の高速回転数と液１０に出るときの回転数に大きな回転速度差が発生する。この回転速度差により、剪断力が発生し、渦流が連続的に剪断される。 That is, light specific gravity gathers at the center of the cylinder, and a tornado-shaped swirling flow 19 is formed. The swirling flow moves to the tip portion 17 of the cylindrical body 15. Since the tip portion 17 includes a portion having an increased inner diameter, the swirling speed of the swirling flow 19 rapidly decreases here. In this state, the swirling flow 19 is ejected from the tip of the cylindrical body 15. At this time, the rotational speed is further attenuated by the liquid 10 around the tip of the cylindrical body 15. Therefore, a large rotational speed difference out when Kino rotational speed faster speed and liquid 10 of the cylindrical body 15 inside of the swirling flow 19 is generated. Due to this rotational speed difference, a shearing force is generated, and the vortex is continuously sheared.

エマルジョン２３中の油に界面活性剤が吸着し水と親和する状態になっている。この状態で上記の剪断力がエマルジョンに働くと、油から界面活性剤が離された状態になり、同時に微小な気泡つまりマイクロバブル２４が発生する。つまりマイクロバブルが発生するときに大きな剪断力が発生する。分離した油はこのマイクロバブル２４の表面に吸着してマイクロバブルとともに浮上し図１の状態になる。マイクロバブル２４は外気と混じり合って消滅する。 Surfactant is ready to be a parent sum and water adsorbed to the oil in the emulsion 23. When the above-described shearing force acts on the emulsion in this state, the surfactant is separated from the oil, and at the same time, fine bubbles, that is, microbubbles 24 are generated. That is, a large shearing force is generated when microbubbles are generated. The separated oil is adsorbed on the surface of the microbubble 24 and floats together with the microbubble to be in the state shown in FIG. The microbubbles 24 are mixed with outside air and disappear.

マイクロバブル発生体４の他の実施例を図８，図９により説明する。図２と同一名称については同一番号を付して説明する。円筒体１５に供給口１６，１８が設けられている。円筒体１５の中間に中央孔２５を持つ仕切壁２６が設けられ、中央孔２５と円筒体１５の出口孔２７との間に円筒体１５の中央孔２５を通ってきた高速の旋回流を急速減衰させる複数の減衰板２８が設けられている。この減衰板２８により旋回流の速度は減衰し、図２の場合と同様の状態が起こる。 Another embodiment of the microbubble generator 4 will be described with reference to FIGS. The same names as those in FIG. 2 will be described with the same numbers. The cylindrical body 15 is provided with supply ports 16 and 18. A partition wall 26 having a central hole 25 is provided in the middle of the cylindrical body 15, and a high-speed swirling flow that passes through the central hole 25 of the cylindrical body 15 between the central hole 25 and the outlet hole 27 of the cylindrical body 15 is rapidly generated. A plurality of attenuation plates 28 for attenuation are provided. The speed of the swirling flow is attenuated by the damping plate 28, and the same state as in FIG.

マイクロバブル発生体４のさらに他の実施例を図１０，図１１により説明する。この実施例は円筒体１５の先端部１７を複雑な形状に加工する替わりに先端にリング３１を設けたものである。このリング３１の形状は図１１に示すように
中央に出口孔２９、とその周囲に複数の連通孔３０を設けたものであり、この特殊な形状により、この部分で旋回流の速度は減衰し、図２の場合と同様の状態が起こる。Still another embodiment of the microbubble generator 4 will be described with reference to FIGS. In this embodiment, a ring 31 is provided at the tip instead of processing the tip 17 of the cylindrical body 15 into a complicated shape. As shown in FIG. 11, the ring 31 is formed with an outlet hole 29 in the center and a plurality of communication holes 30 around the ring hole. Due to this special shape, the speed of the swirling flow is attenuated in this portion. The same situation as in FIG. 2 occurs.

図１２はさらに他の実施例である。この実施例は二つの円筒体１５の先端を対向させる。すると二つの円筒体１５内部の旋回流１９の渦巻き方向が逆になるので、先端から出た旋回流１９は打ち消され、原理的には旋回流はなくなる。つまり円筒体１５内で発生していた旋回流が急ブレーキをかけられて止まった状態になる。このことにより、大きな剪断力が生じ、エマルジョン２３中の油から界面活性剤が離され解乳状態となる。一対の円筒体１５の先端の対向間隔は、二つの円筒体１５の先端から出た旋回流１９が相殺されて旋回流１９がなくなる距離である。種々の条件にもよるが、１０ｍｍ程度が例としてあげられる。前記相殺は完全な相殺であれば良いが、完全な相殺を期待するものではない。この方式は円筒体１５から出た旋回流１９が無くなるので剪断力は大きなものが得られ、エマルジョンの解乳化ばかりでなく、種々のものに利用できる。 FIG. 12 shows still another embodiment. In this embodiment, the tips of two cylindrical bodies 15 are opposed to each other. Then, since the spiral direction of the swirl flow 19 inside the two cylindrical bodies 15 is reversed, the swirl flow 19 coming out from the tip is canceled, and in principle there is no swirl flow. In other words, the swirling flow generated in the cylindrical body 15 is stopped due to sudden braking. Thus, large pruning shear force is generated, the surfactant is separated from the oil in the emulsion 23 becomes a solution milk state. The facing distance between the tips of the pair of cylindrical bodies 15 is a distance at which the swirling flow 19 exiting from the tips of the two cylindrical bodies 15 is canceled and the swirling flow 19 disappears. Although it depends on various conditions, about 10 mm is given as an example. The cancellation may be complete cancellation, but is not expected to be complete. Since this method eliminates the swirling flow 19 from the cylindrical body 15, a large shearing force can be obtained, and it can be used not only for demulsification of emulsion but also for various types.

マイクロバブルを発生させる手段として、加圧圧縮法があるが、この方法ではマイクロバブル発生時に大きな剪断力が発生しないのでエマルジョン中の油から界面活性剤が切離されることが少なく、本発明の効果が期待できない。
一方、図１で説明したように、廃液７は洗浄液で加工された製品を洗浄した液であり基本的には水と油できたエマルジョンを含んでおり、このエマルジョンが増加してくると洗浄液としての効果が劣化する。本発明の解乳化装置、解乳化方法を用いると廃液７中のエマルジョン２３が解乳化され、その結果廃液７は洗浄液として復活し、再利用される。 As a means for generating microbubbles, there is a pressure compression method, but since this method does not generate a large shearing force when microbubbles are generated, the surfactant is less likely to be separated from the oil in the emulsion. I can not expect.
On the other hand, as described in FIG. 1, the waste liquid 7 is a liquid obtained by cleaning a product processed with a cleaning liquid, and basically includes an emulsion made of water and oil. The effect of. When the demulsification apparatus and the demulsification method of the present invention are used, the emulsion 23 in the waste liquid 7 is demulsified, and as a result, the waste liquid 7 is restored as a cleaning liquid and reused.

本発明のエマルジョン解乳化装置、解乳化方法は、廃液となった洗浄液を再生させて再利用させる場合等に用いて有用である。 The emulsion demulsification apparatus and the demulsification method of the present invention are useful when, for example, the cleaning liquid that has become waste liquid is regenerated and reused.

１，６，１３，１４：槽
２ａ，２ｂ：仕切り壁
３ａ，３ｂ，３ｃ：部屋
４：マイクロバブル発生体
５：エアーポンプ
５ａ：空気
６：槽
７：廃液
８，１１：ポンプ
９：取出口
１０：液
１２ａ，１２ｂ：取出口
１５：円筒体
１６，１８：供給口
１７：先端部
１９：旋回流
２０：空気
２１：液
２２：水分
２３：エマルジョン
２４：マイクロバブル
２５：中央孔
２６：仕切壁
２７：出口孔
２８：減衰板
２９：出口孔
３０：連通孔
３１：リング1, 6, 13, 14: Tanks 2a, 2b: Partition walls 3a, 3b, 3c: Room 4: Microbubble generator 5: Air pump 5a: Air 6: Tank 7: Waste liquid 8, 11: Pump 9: Extraction port 10: liquid 12a, 12b: outlet 15: cylindrical body 16, 18: supply port 17: tip 19: swirl flow 20: air 21: liquid 22: moisture 23: emulsion 24: micro bubble 25: central hole 26: partition Wall 27: Outlet hole 28: Damping plate 29: Outlet hole 30: Communication hole 31: Ring

Claims

A tank, a microbubble generator installed in the tank, a liquid supply apparatus that supplies liquid containing an emulsion existing outside or a liquid in the tank or both to the microbubble generator, and the microbubble A gas supply device for supplying a gas body such as air to the generator, wherein the microbubble generator is a swirling shear type microbubble generator, the microbubble generator is a cylindrical body, and the microbubbles are generated A pair of bodies are provided, the tips of the pair of microbubble generators are placed close to each other in an opposing state, and the liquid and gas supplied from the liquid supply device and the gas supply device are swirled at high speed in the cylindrical body. A diameter-enlarged portion that partially enlarges the diameter of the passage through which the swirl flow has passed is provided on the inner wall of the tip of the cylindrical body, and the microbubble generator The emulsion in the liquid supplied to the microbubble generator near the outlet of the microbubble generator is de-emulsified by a shearing force when generated, and separated into at least two types of liquids having no affinity for each other Emulsion demulsifying device characterized.

A tank, a microbubble generator installed in the tank, a liquid supply apparatus that supplies liquid containing an emulsion existing outside or a liquid in the tank or both to the microbubble generator, and the microbubble A gas supply device for supplying a gas body such as air to the generator, wherein the microbubble generator is a swirling shear type microbubble generator, the microbubble generator is a cylindrical body, and the microbubbles are generated A pair of bodies are provided, the tips of the pair of microbubble generators are placed close to each other in an opposing state, and the liquid and gas supplied from the liquid supply device and the gas supply device are swirled at high speed in the cylindrical body. At the outlet of the cylindrical body, a ring provided with a diameter-enlarged portion that partially enlarges the diameter of the outlet is attached, and microbubbles are generated from the microbubble generator The emulsion in the liquid supplied to the microbubble generator near the outlet of the microbubble generator is de-emulsified by a shearing force at the time of separation, and separated into at least two types of liquids having no affinity for each other Emulsion demulsifier.

The emulsion demulsifying device according to claim 1 or 2, wherein the inside diameter of the cylindrical body is reduced from the middle toward the tip .

Supply to the microbubble generator the waste liquid after washing the product containing the emulsion by the tank, the microbubble generator installed in the tank, and the oil and the cleaning liquid present outside, or the liquid in the tank. And a gas supply device that supplies a gas body such as air to the microbubble generator, wherein the microbubble generator is a swirling shear type microbubble generator, and the microbubble generator The liquid and gas supplied from the liquid supply device and the gas supply device are provided with a pair of microbubble generators, the tips of the pair of microbubble generators are placed close to each other in an opposed state. Is provided with a diameter-enlarging portion in which the diameter of the passage through which the swirling flow has passed is partially enlarged on the inner wall of the tip of the cylindrical body. Microbubbles that generate separated oil by demulsifying the emulsion in the liquid supplied to the microbubble generator near the outlet of the microbubble generator by the shearing force when microbubbles are generated from the bubble generator A cleaning liquid regenerator that floats and removes the remaining liquid and regenerates the remaining liquid as a cleaning liquid.

Supply to the microbubble generator the waste liquid after washing the product containing the emulsion by the tank, the microbubble generator installed in the tank, and the oil and the cleaning liquid present outside, or the liquid in the tank. And a gas supply device that supplies a gas body such as air to the microbubble generator, wherein the microbubble generator is a swirling shear type microbubble generator, and the microbubble generator The liquid and gas supplied from the liquid supply device and the gas supply device are provided with a pair of microbubble generators, the tips of the pair of microbubble generators are placed close to each other in an opposed state. collected by a high speed swirling flow in the cylindrical body to an outlet of said cylindrical body, fitted with a ring having a diameter-most of enlarged diameter of the outlet part, the micro-bubble Along with the microbubbles that generate the separated oil by demulsifying the emulsion in the liquid supplied to the microbubble generator near the outlet of the microbubble generator by the shearing force when the microbubbles are generated from the generator A cleaning liquid regenerating apparatus, wherein the cleaning liquid floats and is removed, and the remaining liquid is regenerated as a cleaning liquid.

The swirl shear type microbubble generator is a cylindrical body, a pair of the microbubble generators are provided, and the tips of the pair of microbubble generators are placed close to each other in an opposing state, and the supplied liquid and gas are A high-speed swirling flow is provided in the cylindrical body, and a diameter-enlarging portion in which the diameter of the passage through which the swirling flow passes is provided at the tip of the cylindrical body, and the liquid supplied to the microbubble generator is mutually Including an emulsion composed of at least two kinds of liquids having no affinity for the liquid, and the emulsion in the liquid supplied to the microbubble generator by the shearing force generated when the microbubbles are generated is near the outlet of the microbubble generator. An emulsion demulsification method comprising demulsifying.

The swirl shear type microbubble generator is a cylindrical body, a pair of the microbubble generators are provided, and the tips of the pair of microbubble generators are placed close to each other in an opposing state, and the supplied liquid and gas are A high-speed swirl flow is provided in the cylindrical body, and a diameter-enlarged portion that partially expands the diameter of the passage through which the swirl flow passes is provided at the tip of the cylindrical body, and the liquid supplied to the microbubble generator is at least An emulsion composed of a cleaning liquid and oil, and demulsifying the emulsion in the liquid supplied to the microbubble generator by a shearing force generated when microbubbles are generated near the outlet of the microbubble generator; A method for regenerating a cleaning solution, wherein the cleaning solution is regenerated by removing water .