JPH06246105A - Defoaming device - Google Patents
Defoaming deviceInfo
- Publication number
- JPH06246105A JPH06246105A JP50A JP5807393A JPH06246105A JP H06246105 A JPH06246105 A JP H06246105A JP 50 A JP50 A JP 50A JP 5807393 A JP5807393 A JP 5807393A JP H06246105 A JPH06246105 A JP H06246105A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- suction mouth
- bubbles
- funnel
- device body
- 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
- Degasification And Air Bubble Elimination (AREA)
- Physical Water Treatments (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はコータ（紙仕上機械）の
塗工液内の気泡分離、塗料、ワニス、インキ、接着剤、
ミルク、ラテックス、油圧作動油など各種液体における
気泡分離に利用できる脱泡装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to separation of bubbles in a coating liquid of a coater (paper finishing machine), paint, varnish, ink, adhesive,
The present invention relates to a defoaming device that can be used for air bubble separation in various liquids such as milk, latex and hydraulic oil.
【０００２】[0002]
【従来の技術】各種液体中に気泡が含まれている場合に
は、この気泡が機器の損傷、エアレーション及びキャビ
テーションによるエロージョン、騒音、製品不良、流体
流量計測誤差等を引き起こす原因となるため、気泡を液
体中より分離除去することが必要である。従来より液体
中に混入する気泡を除去するための試みは種々なされて
おり、また脱泡の方式は、遠心力式と重力式に大きく分
けられる。2. Description of the Related Art When air bubbles are contained in various liquids, the air bubbles cause damage to equipment, erosion due to aeration and cavitation, noise, product defects, fluid flow measurement error, etc. Need to be separated and removed from the liquid. Conventionally, various attempts have been made to remove bubbles mixed in a liquid, and defoaming methods are roughly classified into a centrifugal force method and a gravity method.
【０００３】次に前記遠心力式と重力式の夫々について
従来例を説明すると、図４は遠心力を利用した脱泡装置
の例であり、円筒状容器ａの軸心部に内筒ｆを設け、同
容器ａの上部の一側に流入口ｂを、また容器ａの下部の
一側に流出口ｄをそれぞれ設ける。そして容器ａの内面
と内筒ｆの外面とで形成される環状空間で、液体を流入
口ｂから内筒ｆの接線方向に流すことによって液体が旋
回し、その遠心力で比重の軽い気泡を中央に集め、浮上
分離させるようにしたものである。Next, the conventional examples of the centrifugal force type and the gravity type will be explained respectively. FIG. 4 shows an example of a defoaming device utilizing centrifugal force. An inner cylinder f is provided at the axial center of a cylindrical container a. An inlet b is provided on one side of the upper part of the container a, and an outlet d is provided on one side of the lower part of the container a. Then, in the annular space formed by the inner surface of the container a and the outer surface of the inner cylinder f, the liquid is swirled by flowing the liquid in the tangential direction of the inner cylinder f from the inflow port b, and the centrifugal force generates bubbles having a low specific gravity. It was collected in the center and floated and separated.
【０００４】また図５は重力式の脱泡装置の例で、容器
ａの下部に流体流入口ｂを設け、同流入口ｂから流入し
た気液二相流を一旦斜め下方へ移行させるよう、下面を
傾斜させたバケットｃを前記容器ａ内に収納し、同バケ
ットｃに取付けた流出口ｄを容器ａ外へ突出させ、かつ
容器ａ内に入れた液体の液面にフロートバルブｅを浮か
せた構成としてあり、流入口ｂから流入した気泡を含む
液体は、バケットｃの底部に衝突して上向きに方向を変
え、バケットｃ内に反転して流れ込み、気泡は浮上して
液体のみが流出口ｄより流出するようにしてある。FIG. 5 shows an example of a gravity type defoaming device, in which a fluid inlet b is provided in the lower part of a container a, and a gas-liquid two-phase flow flowing in from the inlet b is temporarily moved downward. A bucket c whose lower surface is inclined is housed in the container a, an outlet d attached to the bucket c is projected to the outside of the container a, and a float valve e is floated on the liquid surface of the liquid contained in the container a. The liquid containing bubbles that has flowed in from the inflow port b collides with the bottom of the bucket c, changes its direction upwards, and reverses and flows into the bucket c, and the bubbles float and only the liquid flows out. It is designed to flow out from d.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら図４の遠
心力式の脱泡装置は流体を旋回させることにより発生す
る遠心力を利用して、気泡を中央に集めて分離させるも
のであるため、以下のような問題があった。先ず流体に
旋回流を与える必要があるため、装置の構造が複雑にな
ると共に、大流量の場合は、旋回半径を小にすることが
できず、与え得る遠心力に限界があって、気泡集結機能
が十分でなかった。また大流量の場合に遠心力を大きく
するために、装置への供給速度を大きくとると、供給ポ
ンプの動力が大きくなる欠点があった。更に遠心力を与
えるのが供給ポンプ動力のみであったため、装置内で遠
心力の働いている範囲は狭く、装置が有効に稼動してい
ない等の問題があった。一方図５の重力式の脱泡装置は
気泡の浮上性を利用したものであるが、図５の例では分
離に多大な時間がかかって能率が悪く、かつ容器、槽が
大型になると共に、流体粘度が上昇すると、分離効率が
悪くなる等の問題があった。本発明は前記従来の問題を
解決するために提案されたものである。However, since the centrifugal force type defoaming device of FIG. 4 uses centrifugal force generated by swirling a fluid to collect and separate bubbles in the center, There was such a problem. First, since it is necessary to give a swirling flow to the fluid, the structure of the device becomes complicated, and in the case of a large flow rate, the swirling radius cannot be made small, and the centrifugal force that can be given is limited, and the air bubble condensing Function was not enough. Further, if the supply speed to the apparatus is increased in order to increase the centrifugal force when the flow rate is large, there is a drawback that the power of the supply pump increases. Further, since the centrifugal force is applied only by the power of the supply pump, the range in which the centrifugal force is working in the device is narrow, and there is a problem that the device is not operating effectively. On the other hand, the gravity type defoaming device of FIG. 5 utilizes the floating property of bubbles, but in the example of FIG. 5, it takes a lot of time to separate and is inefficient, and the container and tank become large, When the fluid viscosity increases, there is a problem that the separation efficiency deteriorates. The present invention has been proposed to solve the above conventional problems.
【０００６】[0006]
【課題を解決するための手段】このため本発明は、下部
に液体供給口、上部に気泡除去手段、側部に液体循環手
段を備えた脱泡装置本体の内部に、上面が液体中に開口
し、側面の上部が前記装置本体内面と狭隘部を形成し、
同狭隘部に続く下部は前記狭隘部が徐々に拡大する漏斗
状に形成されると共に、下部に前記本体外部に連通する
液排出口を有するサクションマウスを備えてなるもので
あり、また前記サクションマウスの上部に、除去する気
泡径以下のメッシュを持った金網を設置してなるもの
で、これを課題解決のための手段とするものである。Therefore, according to the present invention, the upper surface is opened into the liquid inside the defoaming apparatus main body provided with the liquid supply port in the lower portion, the bubble removing means in the upper portion, and the liquid circulating means in the side portion. Then, the upper part of the side surface forms a narrow part with the inner surface of the apparatus main body,
The lower part following the narrow part is formed in a funnel shape in which the narrow part gradually expands, and the lower part is provided with a suction mouth having a liquid outlet communicating with the outside of the main body, and the suction mouth. A wire mesh having a mesh with a diameter of bubbles to be removed is installed on the upper part of the above, and this is used as a means for solving the problem.
【０００７】[0007]
【作用】装置本体内を上昇する気泡を含む液体は、サク
ションマウス外側と装置本体内壁との狭隘部で流速が急
速に速くなり、その間で加速された気泡は、慣性力によ
り上昇方向の運動量成分を持ち、サクションマウスには
極めて入り難くなる。しかし或る程度以上の気泡は、サ
クションマウス部には殆ど巻き込まれないが、それ以下
の気泡は巻き込まれる可能性がある。またサクションマ
ウス上部に、除去する気泡径以下のメッシュをもった金
網を設置した請求項２の場合は、更に微細な気泡も除去
できる。[Function] The liquid containing bubbles rising in the main body of the device has a rapid flow velocity at the narrow part between the outer side of the suction mouth and the inner wall of the main body of the device, and the bubbles accelerated in the meantime have a momentum component in the upward direction due to inertial force. It is very difficult to enter the suction mouse. However, bubbles above a certain level are hardly caught in the suction mouth portion, but bubbles below that may be caught. Further, in the case of claim 2 in which a wire net having a mesh with a diameter of bubbles to be removed is installed above the suction mouth, finer bubbles can be removed.
【０００８】[0008]
【実施例】以下本発明を図面の実施例について説明する
と、図１及び図２は本発明の実施例を示す。先ず図１の
第１実施例について説明すると、円筒形の装置本体１の
中に上部が漏斗状のサクションマウス２を内蔵してい
る。サクションマウス２は装置本体１の内面との間に、
上部の漏斗状部が狭隘部を形成し、同狭隘部に続く下部
は徐々に間隔が拡大し、下部は出口７に連通している。
また気泡を含む液体は、供給口３より供給され、サクシ
ョンマウス２の外側で流速が速くなるため気液が分離さ
れ、大きな気泡はサクションマウス２の上部へ浮上して
装置本体１上部の空気層４を形成する。また液体の一部
は循環パイプ５を通って装置本体１へ戻り、液体の大部
分はサクションマウス２を通って分離装置外へ排出さ
れ、所定の目的のために利用される。８は液体を循環さ
せるために循環パイプ５上に設けられた循環ポンプで、
装置本体１内で上昇流を生じさせる役割を持っている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments of the drawings. FIGS. 1 and 2 show the embodiments of the present invention. First, the first embodiment of FIG. 1 will be described. A suction mouse 2 having a funnel-shaped upper part is built in a cylindrical device body 1. Between the suction mouse 2 and the inner surface of the device body 1,
The funnel-shaped portion of the upper portion forms a narrow portion, the lower portion following the narrow portion has a gradually increasing distance, and the lower portion communicates with the outlet 7.
Further, the liquid containing bubbles is supplied from the supply port 3 and the flow velocity is increased outside the suction mouth 2, so that the gas-liquid is separated, and the large bubbles float to the upper part of the suction mouth 2 and the air layer above the main body 1 of the apparatus. 4 is formed. A part of the liquid returns to the apparatus main body 1 through the circulation pipe 5, and most of the liquid is discharged to the outside of the separation apparatus through the suction mouth 2 and used for a predetermined purpose. 8 is a circulation pump provided on the circulation pipe 5 for circulating the liquid,
It has a role to generate an upward flow in the apparatus body 1.
【０００９】さて図１において気泡を含む塗工液は、供
給口３より気液分離装置本体１に導入され、サクション
マウス２部で大きな気泡（直径３ｍｍ以上のもの）は上
昇し、それ以下の径の気泡を含む塗工液は、サクション
マウス２の内側を通って下降する。また装置本体１の上
部に浮上して溜まった気泡層４は、空気抜きパイプ６よ
り真空ポンプ９で抜き出す。一方塗工液の一部は、常に
循環パイプ５により装置本体１内を循環している。本実
施例で点Ｐ1 の位置の流速は、５ｃｍ／ｓｅｃである。
ここで点Ｐ1 は装置１のマウス２を取り外したときの空
塔速度を示す。また点Ｐ2 の流速は、２０ｃｍ／ｓｅｃ
とした。一方全供給流量は900 l/min であり、装置内の
循環パイプ５を循環している量は、全供給流量の５％
（45 l/min）とした。また供 給塗工液は、８ｖｏｌ％
で平均気泡径が２．５ｍｍであったものが、装置本体の
出口７では５ｖｏｌ％で平均気泡径は０．８ｍｍであっ
た。気泡層４の気圧はパイプ６より真空ポンプ９で空気
を抜き出すことにより若干（７００ｍｍＨｇ）減圧状態
にした。なお、コータ（紙仕上機械）の塗工液は、気泡
としては直径１ｍｍ以下で、４〜５ｖｏｌ％以下の気泡
率であれば、紙質上は全く問題がない。特に直径５ｍｍ
以上の気泡があれば、スキップという塗工液が紙に塗工
されていない箇所が存在するケースがある。Now, in FIG. 1, the coating liquid containing bubbles is introduced into the gas-liquid separating apparatus main body 1 through the supply port 3, and large bubbles (having a diameter of 3 mm or more) rise in the suction mouth 2 part, and below. The coating liquid containing bubbles of a diameter descends through the inside of the suction mouth 2. Further, the air bubble layer 4 floating and accumulated on the upper part of the apparatus main body 1 is extracted from the air vent pipe 6 by the vacuum pump 9. On the other hand, a part of the coating liquid is constantly circulated in the apparatus main body 1 by the circulation pipe 5. In this embodiment, the flow velocity at the point P 1 is 5 cm / sec.
Here, the point P 1 indicates the superficial velocity when the mouse 2 of the device 1 is removed. The flow velocity at point P 2 is 20 cm / sec.
And On the other hand, the total supply flow rate is 900 l / min, and the amount circulating in the circulation pipe 5 in the device is 5% of the total supply flow rate.
(45 l / min). The supplied coating liquid is 8 vol%
Although the average bubble diameter was 2.5 mm, the average bubble diameter was 0.8 mm at 5 vol% at the outlet 7 of the apparatus main body. The air pressure of the bubble layer 4 was slightly reduced (700 mmHg) by depressurizing air from the pipe 6 with the vacuum pump 9. The coating liquid of the coater (paper finishing machine) has no problem in terms of paper quality as long as the bubbles have a diameter of 1 mm or less and a bubble percentage of 4 to 5 vol%. Especially 5 mm in diameter
If the above bubbles are present, there is a case where there is a portion called skip, where the coating liquid is not coated on the paper.
【００１０】図３にＰ1 の速度を５ｃｍ／ｓｅｃとした
場合と、４５ｃｍ／ｓｅｃとした場合にサクションマウ
ス２の径を変えた時のサクションマウス２の下部出口７
での気泡率を示す。なお、液体供給口３での条件は、前
述の通りで供給口３での気泡率は８ｖｏｌ％で、平均気
泡径は２．５ｍｍであった。また図２では、サクション
マウス２の漏斗状部の上面に、除去する気泡径以下のメ
ッシュを持った金網１０を設置したものであり、図１に
比べ更に微細な気泡を除去するようにしたものである。
次に図１を用いて行なった試験の結果、下記の点が判明
した。サクションマウスの径を大きくして、マウス外側
面の流速を上げると気液分離性は良くなる。またマウス
径を大きくすることにより循環液の吹込み流速が小さく
なり、気泡の吹込みが少なくなる。またサクションマウ
スの高さを高くすると、気泡の吹込みが少なくなる。In FIG. 3, the lower exit 7 of the suction mouth 2 when the diameter of the suction mouth 2 is changed when the speed of P 1 is 5 cm / sec and when it is 45 cm / sec.
Shows the bubble ratio at. The conditions at the liquid supply port 3 were as described above, and the bubble ratio at the supply port 3 was 8 vol% and the average bubble diameter was 2.5 mm. In addition, in FIG. 2, a wire net 10 having a mesh having a diameter equal to or smaller than the diameter of the bubble to be removed is installed on the upper surface of the funnel-shaped portion of the suction mouth 2, so that finer bubbles can be removed as compared with FIG. Is.
Next, as a result of the test conducted using FIG. 1, the following points were found. The gas-liquid separation is improved by increasing the diameter of the suction mouse and increasing the flow velocity on the outer surface of the mouse. Further, by increasing the diameter of the mouth, the flow velocity of the circulating liquid is reduced and the amount of bubbles is reduced. Further, when the height of the suction mouth is increased, air bubbles are less blown.
【００１１】[0011]
【発明の効果】以上詳細に説明した如く本発明による
と、装置本体内を上昇する気泡を含む液体は、サクショ
ンマウスの漏斗状部と装置本体内面との間の狭隘部での
流速が急速に速くなり、その間で加速された気泡は、慣
性力により上昇方向の運動量成分を持ち、大きな気泡は
上昇してサクションマウスには入り難くなり、それ以下
の気泡を含む液体がサクションマウスを通って下部より
排出される。従って本発明によると、気液分離性を高め
ることができる。As described in detail above, according to the present invention, the liquid containing bubbles rising in the apparatus main body has a rapid flow velocity in the narrow portion between the funnel-shaped portion of the suction mouth and the inner surface of the apparatus main body. The bubbles accelerated, and the bubbles accelerated in the meantime have a momentum component in the ascending direction due to inertial force, large bubbles rise and become difficult to enter the suction mouth, and liquid containing bubbles below it passes through the suction mouth to the lower part. More discharged. Therefore, according to the present invention, gas-liquid separability can be enhanced.
【図１】本発明の第１実施例を示す脱泡装置の縦断面図
である。FIG. 1 is a vertical cross-sectional view of a defoaming device showing a first embodiment of the present invention.
【図２】本発明の第２実施例を示す脱泡装置の縦断面図
である。FIG. 2 is a vertical sectional view of a defoaming device showing a second embodiment of the present invention.
【図３】本発明における狭隘部の流速とサクションマウ
スの下部出口部での気泡率との関係を示す線図である。FIG. 3 is a diagram showing a relationship between a flow velocity at a narrow portion and a bubble rate at a lower outlet portion of a suction mouth in the present invention.
【図４】従来の気液分離装置の１例を示す縦断面図であ
る。FIG. 4 is a vertical cross-sectional view showing an example of a conventional gas-liquid separator.
【図５】従来の図４と異なる気液分離装置の縦断面図で
ある。FIG. 5 is a vertical cross-sectional view of a gas-liquid separator different from the conventional one shown in FIG.
１ 分離装置本体 ２ サクションマウス ３ 供給口 ４ 空気層 ５ 循環パイプ ６ 空気抜き用パイプ ７ 装置本体の出口 ８ 循環ポンプ ９ 真空ポンプ １０ 金網 1 Separation device body 2 Suction mouth 3 Supply port 4 Air layer 5 Circulation pipe 6 Air vent pipe 7 Device body outlet 8 Circulation pump 9 Vacuum pump 10 Wire mesh
Claims (2)
段、側部に液体循環手段を備えた脱泡装置本体の内部
に、上面が液体中に開口し、側面の上部が前記装置本体
内面と狭隘部を形成し、同狭隘部に続く下部は前記狭隘
部が徐々に拡大する漏斗状に形成されると共に、下部に
前記本体外部に連通する液排出口を有するサクションマ
ウスを備えてなることを特徴とする脱泡装置。1. An inside of a defoaming device body having a liquid supply port at a lower portion, a bubble removing means at an upper portion, and a liquid circulating means at a side portion, an upper surface is opened in the liquid, and an upper side surface is an inner surface of the apparatus body. And a lower part following the narrow part is formed in a funnel shape in which the narrow part gradually expands, and a suction mouth having a liquid outlet communicating with the outside of the main body is provided in the lower part. Defoaming device.
る気泡径以下のメッシュを持った金網を設置したことを
特徴とする請求項１記載の脱泡装置。2. The defoaming device according to claim 1, wherein a wire net having a mesh with a diameter of bubbles to be removed is installed above the suction mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05807393A JP3202391B2 (en) | 1993-02-24 | 1993-02-24 | Defoaming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05807393A JP3202391B2 (en) | 1993-02-24 | 1993-02-24 | Defoaming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06246105A true JPH06246105A (en) | 1994-09-06 |
| JP3202391B2 JP3202391B2 (en) | 2001-08-27 |
Family
ID=13073742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05807393A Expired - Fee Related JP3202391B2 (en) | 1993-02-24 | 1993-02-24 | Defoaming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3202391B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003086615A1 (en) * | 2002-04-01 | 2003-10-23 | Techno Network Shikoku Co., Ltd. | Submerged plasma generator, method of generating plasma in liquid and method of decomposing toxic substance with plasma in liquid |
| KR101964832B1 (en) * | 2018-08-23 | 2019-04-02 | 이에스피 주식회사 | Water treatment apparatus |
| KR101964830B1 (en) * | 2018-08-23 | 2019-08-07 | 이에스피 주식회사 | Water treatment apparatus |
-
1993
- 1993-02-24 JP JP05807393A patent/JP3202391B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003086615A1 (en) * | 2002-04-01 | 2003-10-23 | Techno Network Shikoku Co., Ltd. | Submerged plasma generator, method of generating plasma in liquid and method of decomposing toxic substance with plasma in liquid |
| US7067204B2 (en) | 2002-04-01 | 2006-06-27 | National University Corporation Ehime University | Submerged plasma generator, method of generating plasma in liquid and method of decomposing toxic substance with plasma in liquid |
| CN100336586C (en) * | 2002-04-01 | 2007-09-12 | 国立大学法人爱媛大学 | Submerged plasma generator, method of generating plasma in liquid and method of decomposing toxic substance with plasma in liquid |
| KR101964832B1 (en) * | 2018-08-23 | 2019-04-02 | 이에스피 주식회사 | Water treatment apparatus |
| KR101964830B1 (en) * | 2018-08-23 | 2019-08-07 | 이에스피 주식회사 | Water treatment apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3202391B2 (en) | 2001-08-27 |
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