JP2004025026A - Defoaming apparatus - Google Patents

Defoaming apparatus Download PDF

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Publication number
JP2004025026A
JP2004025026A JP2002184438A JP2002184438A JP2004025026A JP 2004025026 A JP2004025026 A JP 2004025026A JP 2002184438 A JP2002184438 A JP 2002184438A JP 2002184438 A JP2002184438 A JP 2002184438A JP 2004025026 A JP2004025026 A JP 2004025026A
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JP
Japan
Prior art keywords
tank
foam
casing
liquid
defoaming
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Pending
Application number
JP2002184438A
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Japanese (ja)
Inventor
Setsuo Hotani
穂谷 節男
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Hotani Co Ltd
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Hotani Co Ltd
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Publication date
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Priority to JP2002184438A priority Critical patent/JP2004025026A/en
Priority to KR1020020037392A priority patent/KR20040002045A/en
Publication of JP2004025026A publication Critical patent/JP2004025026A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D19/00Degasification of liquids
    • B01D19/02Foam dispersion or prevention
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D19/00Degasification of liquids
    • B01D19/0068General arrangements, e.g. flowsheets

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Degasification And Air Bubble Elimination (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently defoam a foaming liquid in such a specification that foams of the foaming liquid are sucked through a sucking port of a casing by rotation of vanes in a casing and the foams are scattered by centrifugal force to the inner wall of the casing to defoam. <P>SOLUTION: The apparatus is equipped with a first closed tank 1 housing a foamed liquid, and a second tank 2 recovering the liquid produced by defoaming. The second tank 2 is provided with a defoaming unit 3 in which vanes 32 are rotated in a casing 31 to suck the foams in the foamed liquid through the sucking port 33 of the casing and to collide the foam to the inner face of the casing to defoam by centrifugal force. The portion of the first tank 1 corresponding to the foam phase region is connected by a pipe 4 to the sucking port 33 of the defoaming unit 3. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、泡立った液、例えばストリップを洗浄したアルカリ液の消泡装置、より詳しくはケーシング内の羽根車の回転で、同ケーシングの吸引口から泡立ち液の泡を吸引し、これを当該ケーシング内周面に遠心力で飛散させて、消泡する消泡装置に関する。
【0002】
【従来の技術】
従来、このような仕様で泡立ち液を消泡するものとしては、特開平11−9903号が知られている。
【0003】
この従来技術は、泡立った液を開放型のタンクに収容し、その泡立った液の泡を当該タンクに備えた泡消し器で消泡するものである。その消泡仕様の概要を図解すると、図6に示す如くである。図6でAが泡消し器、Bが泡立ち液収容タンクである。泡消し器AはケーシングC及び羽根車Dを具備する。Eが泡消し器AにおけるケーシングCの吸引管、Fが羽根車Dのモータ、GがケーシングCの排出口である。
【0004】
前記泡消し器Aの羽根車Dが駆動されると、吸引管Eより空気をケーシングCに吸引し、排出口Gを経て排出する。これに伴い、タンクB内の泡立ち液の液面上の泡を吸引管Eを通じケーシングCに吸い込む。吸い込まれた泡は、羽根車Dの回転による遠心力で、ケーシングCの内周面に衝突されて消泡される。この消泡で生じた液滴は、排出口GからタンクBに落下する。
【0005】
泡立ち液を収容するタンクBは開放型であり、タンクB内の泡立ち液液面上の泡相中に、吸引管Eの入り口が開口されている。
【0006】
【発明が解決しようとする課題】
この従来技術よると、泡消し器Aの羽根車Dの回転によって生じる気流は、図6中に矢符で示すような、比較的小さな領域を環流するに過ぎず、十分な泡吸引効率、換言すれば十分に良好な消泡効率は望めない。このことは、泡消し器Aの吸引管Eを複数本にしたり、タンクBの液面上を移動し得るようにしたり、吸引管Eの吸引口にタンクB液面上の泡を掻き寄せ片で掻き寄せるようにしたりするという、改変を付加していることによっても明らかである。
【0007】
本発明は上記従来技術による問題を解消し、前述した仕様で泡立ち液の消泡を効率よく行えるようにしようというものである。
【0008】
【課題を解決するための手段】
上記課題解決のため本発明は、泡立った液を収容する閉鎖型の第1のタンクと、消泡で生じた液を回収する第2のタンクとを併設し、吸引口及び吐出口を持つケーシング内で羽根車が回転して、該ケーシングの吸引口から泡立ち液の泡を吸い込み、これを遠心力で該ケーシング内周面に衝突させて消泡する泡消し器を前記第2のタンクに設け、第1のタンクの泡相領域の部位と、第2のタンクの泡消し器の吸引口とを管によって接続している。
【0009】
ここに明らかなように本発明では、泡立った液の泡相を、泡立ち液収容タンクから泡消し器の吸引口までの全域につき、閉鎖経路に封じ込めている。このため泡消し器の吸引口には、実質上、外気が吸引されることはなく、泡消しされる泡相のみが吸引される。従って、消泡されるべき泡は効率よく泡消される。
【0010】
第1のタンクが、該タンクから泡立ち液の泡相を抽出する管の入り口と離隔した箇所において、当該タンクの泡相領域部位に狭隘なスリットを持つているときは、消泡効率は更によくなる。
【0011】
泡立った液の泡相を、泡立ち液収容タンクから泡消し器の吸引口までの全域につき、閉鎖経路に封じ込めることの構想は、泡立ち液を処理するシステムを、泡立った液を収容する第1のタンクの系と、泡消し器を備えて消泡する第2のタンクの系との合成構成としたことにより、体現されている。
【0012】
泡消し器の羽根車が、モータにより増速伝動機構を介して駆動されるようにするときは、泡消し器の羽根車の増速回転により、泡相の吸い込み効果、消泡効果がより良化される。また第2のタンクを複数設置し、それら第2のタンクそれぞれの泡消し器の羽根車を、一基のモータで増速伝動機構を介し駆動させるようにできる。
【0013】
【発明の実施の形態】
本発明の実施形態を図面を参照して、実施例と共に説明する。図で1が第1のタンク、2が第2のタンクである。第1のタンク1は閉鎖型、第2のタンク2は開放型である。第1のタンク1には、例えばストリップを洗浄したアルカリ液のような、泡立った液が収容される。第2のタンク2には、消泡で生じた液が回収される。これら第1のタンク1及び第2のタンク2は、併設される。
【0014】
第2のタンク2には、泡消し器3が装備される。泡消し器3は、ケーシング31、該ケーシング31内に設けられた羽根車32、吸引口33及び吐出口36を具備する。
【0015】
泡消し器3は、羽根車32がケーシング31内で回転して、同ケーシング31の吸引口33から泡立ち液の泡を吸い込み、これを遠心力で同ケーシング31内周面に衝突させて消泡する。羽根車32は、モータMで駆動される。羽根車32のモータ駆動は、図3に示すような直結型の様式でもよいし、図4に示すような伝動機構34を介しての間接型様式でもよい。当該伝動機構34には、エンドレスベルト形式やエンドレスチェーン形式のものを用いることができる。
【0016】
泡消し器3は、第2のタンク2一基につき、一つを装備してもよいし、複数を備えてもよい。複数装備の場合、それら複数の泡消し器3は、一基のモータMで、エンドレスベルトまたはエンドレスチェーンによる伝動機構35を介して、駆動するようにするとよい(図5参照)。
【0017】
羽根車32のモータ駆動を間接型様式とする場合、その伝動機構には増速伝動機構を充てるとよい。
【0018】
第1のタンク1の泡相領域の部位と、第2のタンク2の泡消し器3の吸引口33とが、これらの間に亘って延びる管4で接続される。この接続は、泡立った液の泡を、第1のタンク1から泡消し器3の吸引口33に至る全域につき、閉鎖経路に封じ込めることをもたらす。このため、泡消し器3の吸引口33には、実質上、外気が吸引されることなく、泡消しされる泡が効率よく吸引され、十分に高い消泡効率が得られる。
【0019】
泡消し器3で消泡されて生じた液滴は、泡消し器3の吐出口36から吐出されて、第2のタンク2に回収される。
【0020】
第1のタンク1には、該タンク1から泡立ち液の泡を抽出する管4の入り口と離隔した箇所において、当該タンク1の泡相領域部位に狭隘なスリットSを形成しておく(図2参照)ことが好ましい。これによると、タンク1内の泡相が泡消し器3の吸引口33に羽根車32で管4を通じ吸引される際、前記の狭隘なスリットSから外気を吸い込んで、前記泡相の吸引抵抗を軽減させ、泡相の吸引効率が高まるので、消泡効率が更によくなる。
【0021】
第2のタンク2内の液は、ポンプ5により管6を通じ第1のタンク1に回送される。
【0022】
【発明の効果】
本発明は以上に述べたような形態で実施され、次に示すような効果を奏する。冒頭に述べた仕様の泡立ち液の泡消を効率よく行える。
【図面の簡単な説明】
【図1】本発明に係る消泡装置の一例を示す立面図である。
【図2】本発明に係る消泡装置の変更例を示す立面図である。
【図3】本発明に係る泡消し器のモータ駆動の一例を示す立面図である。
【図4】本発明に係る泡消し器のモータ駆動の他例を示す立面図である。
【図5】本発明に係る泡消し器のモータ駆動の別の他例を示す平面図である。
【図6】従来技術の消泡装置の立面図を示す。
【符号の説明】
1   第1のタンク
2   第2のタンク
3   泡消し器
31  ケーシング
32  羽根車
33  吸引口
36  吐出口
4   管
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a defoaming device for bubbling liquid, for example, an alkaline solution that has washed a strip, and more specifically, to rotate bubbles of a bubbling liquid from a suction port of the casing by rotation of an impeller in the casing, and to remove the foam from the casing. The present invention relates to a defoaming device for defoaming by scattered on an inner peripheral surface by centrifugal force.
[0002]
[Prior art]
Conventionally, Japanese Patent Application Laid-Open No. H11-9903 discloses a method for defoaming a foaming liquid with such specifications.
[0003]
In this prior art, a foamed liquid is stored in an open tank, and the foam of the foamed liquid is defoamed by a foam eraser provided in the tank. FIG. 6 shows the outline of the defoaming specification. In FIG. 6, A is a foam eraser, and B is a foaming liquid storage tank. The defoamer A includes a casing C and an impeller D. E is a suction pipe of the casing C in the bubble eliminator A, F is a motor of the impeller D, and G is an outlet of the casing C.
[0004]
When the impeller D of the bubble eliminator A is driven, air is sucked into the casing C from the suction pipe E and discharged through the discharge port G. Along with this, bubbles on the liquid surface of the foaming liquid in the tank B are sucked into the casing C through the suction pipe E. The sucked foam collides with the inner peripheral surface of the casing C and is defoamed by the centrifugal force generated by the rotation of the impeller D. The droplet generated by this defoaming falls from the discharge port G to the tank B.
[0005]
The tank B for storing the foaming liquid is of an open type, and an inlet of the suction pipe E is opened in a foam phase on the surface of the foaming liquid in the tank B.
[0006]
[Problems to be solved by the invention]
According to this conventional technique, the airflow generated by the rotation of the impeller D of the bubble eliminator A only recirculates in a relatively small area as indicated by an arrow in FIG. If this is the case, a sufficiently good defoaming efficiency cannot be expected. This means that a plurality of suction tubes E of the bubble eliminator A can be used, the bubble can be moved on the liquid surface of the tank B, and bubbles on the liquid surface of the tank B can be scraped by the suction port of the suction tube E. It is also evident from the fact that a modification has been added, such as to make it rush.
[0007]
An object of the present invention is to solve the above-mentioned problems of the prior art and to efficiently defoam a foaming liquid in the above-mentioned specification.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a casing having a closed first tank for storing a foamed liquid and a second tank for collecting the liquid generated by defoaming, and having a suction port and a discharge port. In the second tank, the impeller rotates to suck in the foam of the foaming liquid from the suction port of the casing, and collides the foam with the inner peripheral surface of the casing by centrifugal force to defoam the foam. The portion of the foam phase region of the first tank is connected to the suction port of the foam remover of the second tank by a pipe.
[0009]
As is apparent here, in the present invention, the foam phase of the foamed liquid is confined in a closed path over the entire area from the foaming liquid storage tank to the suction port of the foam eraser. Therefore, substantially no outside air is sucked into the suction port of the bubble eliminator, and only the foam phase to be defoamed is sucked. Therefore, the foam to be defoamed is efficiently defoamed.
[0010]
The defoaming efficiency is further improved when the first tank has a narrow slit in the foam phase region of the tank at a position separated from the inlet of the tube for extracting the foam phase of the foaming liquid from the tank. .
[0011]
The concept of enclosing the foam phase of the foamed liquid in a closed path, from the foaming liquid storage tank to the suction port of the defoamer, is to provide a system for treating the foamed liquid with the first foamed liquid containing system. This is embodied by a composite structure of a tank system and a second tank system that includes a foam eraser and defoams.
[0012]
When the defoamer impeller is driven by a motor via a speed-enhancing transmission mechanism, the speed of rotation of the defoamer impeller increases the suction and defoaming effects of the foam phase. Be converted to Also, a plurality of second tanks can be installed, and the impeller of the bubble eliminator in each of the second tanks can be driven by a single motor via a speed increasing transmission mechanism.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described together with examples with reference to the drawings. In the figure, 1 is a first tank and 2 is a second tank. The first tank 1 is closed and the second tank 2 is open. The first tank 1 contains a foamed liquid, for example an alkaline liquid from which the strip has been washed. The liquid generated by the defoaming is collected in the second tank 2. The first tank 1 and the second tank 2 are provided side by side.
[0014]
The second tank 2 is equipped with a defoamer 3. The bubble eliminator 3 includes a casing 31, an impeller 32 provided in the casing 31, a suction port 33, and a discharge port 36.
[0015]
In the defoamer 3, the impeller 32 rotates in the casing 31, sucks the foam of the bubbling liquid from the suction port 33 of the casing 31, and collides the foam with the inner peripheral surface of the casing 31 by centrifugal force to defoam. I do. The impeller 32 is driven by a motor M. The motor drive of the impeller 32 may be a direct connection type as shown in FIG. 3 or an indirect type via a transmission mechanism 34 as shown in FIG. The transmission mechanism 34 may be of an endless belt type or an endless chain type.
[0016]
One defoaming device 3 may be provided for one second tank 2, or a plurality of defoaming devices may be provided. In the case of a plurality of devices, the plurality of bubble eliminators 3 may be driven by a single motor M via a transmission mechanism 35 using an endless belt or an endless chain (see FIG. 5).
[0017]
When the motor drive of the impeller 32 is of the indirect type, it is preferable to use a speed increasing transmission mechanism for the transmission mechanism.
[0018]
The portion of the foam phase region of the first tank 1 and the suction port 33 of the defoamer 3 of the second tank 2 are connected by a pipe 4 extending therebetween. This connection results in the foaming of the liquid foam being confined in a closed path over the entire area from the first tank 1 to the suction opening 33 of the defoamer 3. For this reason, the bubble to be defoamed is efficiently sucked into the suction port 33 of the defoamer 3 substantially without suction of outside air, and a sufficiently high defoaming efficiency is obtained.
[0019]
The liquid droplets generated by the defoaming by the defoamer 3 are discharged from the discharge port 36 of the defoamer 3 and collected in the second tank 2.
[0020]
In the first tank 1, a narrow slit S is formed in the foam phase region of the tank 1 at a position separated from the entrance of the pipe 4 for extracting the foam of the foaming liquid from the tank 1 (FIG. 2). See also preferred). According to this, when the foam phase in the tank 1 is sucked into the suction port 33 of the foam eraser 3 through the pipe 4 by the impeller 32, the outside air is sucked from the narrow slit S and the suction resistance of the foam phase is reduced. And the suction efficiency of the foam phase is increased, so that the defoaming efficiency is further improved.
[0021]
The liquid in the second tank 2 is sent to the first tank 1 by the pump 5 through the pipe 6.
[0022]
【The invention's effect】
The present invention is implemented in the form described above, and has the following effects. The defoaming of the foaming liquid having the specifications described at the beginning can be efficiently performed.
[Brief description of the drawings]
FIG. 1 is an elevation view showing an example of a defoaming device according to the present invention.
FIG. 2 is an elevation view showing a modified example of the defoaming device according to the present invention.
FIG. 3 is an elevation view showing an example of motor driving of the bubble eliminator according to the present invention.
FIG. 4 is an elevation view showing another example of the motor drive of the bubble eliminator according to the present invention.
FIG. 5 is a plan view showing another example of the motor drive of the bubble eliminator according to the present invention.
FIG. 6 shows an elevation view of a prior art defoamer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st tank 2 2nd tank 3 Defoamer 31 Casing 32 Impeller 33 Suction port 36 Discharge port 4 Pipe

Claims (4)

泡立った液を収容する閉鎖型の第1のタンクと、消泡で生じた液を回収する第2のタンクとを併設し、吸引口及び吐出口を持つケーシング内で羽根車が回転して、該ケーシングの吸引口から泡立ち液の泡を吸い込み、これを遠心力で該ケーシング内周面に衝突させて消泡する泡消し器を前記第2のタンクに設け、第1のタンクの泡相領域の部位と、泡消し器の吸引口とを管によって接続したことを特徴とする消泡装置。A closed first tank for storing the foamed liquid and a second tank for collecting the liquid generated by the defoaming are provided, and the impeller rotates in a casing having a suction port and a discharge port, The second tank is provided with a foam eraser for sucking foam of the foaming liquid from the suction port of the casing and colliding the foam with the inner peripheral surface of the casing by centrifugal force to eliminate the foam. A defoaming device characterized in that a part of (1) and a suction port of the defoamer were connected by a pipe. 第1のタンクが、該タンクから泡立ち液の泡を抽出する管の入り口と離隔した箇所において、当該タンクの泡相領域部位に狭隘なスリットを持つものである請求項1記載の消泡装置。2. The defoaming apparatus according to claim 1, wherein the first tank has a narrow slit in a foam phase region portion of the tank at a position separated from an inlet of a tube for extracting foam of a foaming liquid from the tank. 泡消し器の羽根車が、モータにより増速伝動機構を介して駆動されるようになっている請求項1記載の消泡装置。The defoaming device according to claim 1, wherein the impeller of the foam defoamer is driven by a motor via a speed increasing transmission mechanism. 第1のタンクが、該タンクから泡立ち液の泡を抽出する管の入り口と離隔した箇所において、当該タンクの泡相領域部位に狭隘なスリットを持つものであり、泡消し器の羽根車が、モータにより増速伝動機構を介して駆動されるようになっている請求項1記載の消泡装置。The first tank has a narrow slit in a foam phase region portion of the tank at a position separated from an inlet of a pipe for extracting foam of a foaming liquid from the tank, and an impeller of the foam eraser includes: The defoaming device according to claim 1, wherein the defoaming device is driven by a motor via a speed increasing transmission mechanism.
JP2002184438A 2002-06-25 2002-06-25 Defoaming apparatus Pending JP2004025026A (en)

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JP2002184438A JP2004025026A (en) 2002-06-25 2002-06-25 Defoaming apparatus
KR1020020037392A KR20040002045A (en) 2002-06-25 2002-06-29 Foam removing apparatus

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Cited By (4)

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US7238284B2 (en) * 2004-10-28 2007-07-03 Hotani Co., Ltd. Apparatus for processing alkaline solution
JP2008212868A (en) * 2007-03-06 2008-09-18 Mitsubishi Electric Corp Sludge treatment apparatus
WO2008155037A1 (en) 2007-06-21 2008-12-24 Hexion Specialty Chemicals Research Belgium S.A. Thermosetting polyester coatings for dye ink sublimation
JP2018149483A (en) * 2017-03-13 2018-09-27 豊興工業株式会社 Defoaming device

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KR100725324B1 (en) * 2005-12-23 2007-06-07 주식회사 포스코 Apparatus for foam removal in alkaline cleaning process of metal strip and its method

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US7238284B2 (en) * 2004-10-28 2007-07-03 Hotani Co., Ltd. Apparatus for processing alkaline solution
JP2008212868A (en) * 2007-03-06 2008-09-18 Mitsubishi Electric Corp Sludge treatment apparatus
WO2008155037A1 (en) 2007-06-21 2008-12-24 Hexion Specialty Chemicals Research Belgium S.A. Thermosetting polyester coatings for dye ink sublimation
JP2018149483A (en) * 2017-03-13 2018-09-27 豊興工業株式会社 Defoaming device

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