JP6912550B2 - Liquid treatment equipment and liquid treatment method - Google Patents

Liquid treatment equipment and liquid treatment method Download PDF

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Publication number
JP6912550B2
JP6912550B2 JP2019215987A JP2019215987A JP6912550B2 JP 6912550 B2 JP6912550 B2 JP 6912550B2 JP 2019215987 A JP2019215987 A JP 2019215987A JP 2019215987 A JP2019215987 A JP 2019215987A JP 6912550 B2 JP6912550 B2 JP 6912550B2
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tank
liquid
bubble
treatment
outlet
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JP2020185565A (en
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章寛 谷井
章寛 谷井
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Sugino Machine Ltd
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Sugino Machine Ltd
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Priority to US16/779,445 priority Critical patent/US20200354241A1/en
Priority to CN202010097601.4A priority patent/CN111905412B/en
Priority to KR1020200020304A priority patent/KR102405527B1/en
Priority to EP20162035.8A priority patent/EP3736031B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0205—Separation of non-miscible liquids by gas bubbles or moving solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/04—Breaking emulsions
    • B01D17/045—Breaking emulsions with coalescers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23121—Diffusers having injection means, e.g. nozzles with circumferential outlet
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Description

本発明は、液処理装置および液処理方法に関する。 The present invention relates to a liquid treatment apparatus and a liquid treatment method.

槽と、槽内に設置されたマイクロバブル発生体と、液体をマイクロバブル発生体に供給する供給装置と、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、を有するエマルジョン解乳化装置が提案されている（特開２０１５−１５５０９２号公報）。従来のエマルジョン解乳化装置では、マイクロバブル発生体から出たマイクロバブルによって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種類の液に分離し、一方の液体をマイクロバブルとともに浮上させる。 An emulsion solution having a tank, a micro-bubble generator installed in the tank, a supply device for supplying liquid to the micro-bubble generator, and a gas supply device for supplying a gas body such as air to the micro-bubble generator. An emulsifying device has been proposed (Japanese Unexamined Patent Publication No. 2015-155092). In the conventional emulsion demulsifying device, the emulsion in the liquid is emulsified by the microbubbles emitted from the microbubble generator, separated into at least two kinds of liquids having no affinity for each other, and one liquid floats together with the microbubbles. Let me.

従来のエマルジョン解乳化装置では、除去する低比重液と共に高比重液が廃棄される。
本発明は、高比重液の廃棄量を減少する液処理装置および液処理方法を提供する。 In a conventional emulsion demulsifying device, a high density liquid is discarded together with a low density liquid to be removed.
The present invention provides a liquid treatment apparatus and a liquid treatment method for reducing the amount of waste of a high-density liquid.

本発明の第１の側面は、
タンクに貯留された処理液を送る給液ポンプと、
前記処理液が流入する気泡槽であって、
前記処理液の液面の近傍に配置され、前記処理液上に浮上した浮上物を排出する浮上物排出口を有する、気泡槽と、
前記気泡槽の外部に配置される微細気泡発生器であって、前記給液ポンプから送られた前記処理液に空気を混入させて微細気泡を発生する微細気泡発生器と、
前記気泡槽と下部で接続する分離槽と、
前記分離槽の液面から溢れ出す前記処理液を前記タンクへ戻す循環管と、
を有する液処理装置である。 The first aspect of the present invention is
A liquid supply pump that sends the processing liquid stored in the tank,
A bubble tank into which the treatment liquid flows.
A bubble tank, which is arranged in the vicinity of the liquid surface of the treatment liquid and has a floating material discharge port for discharging the floating material floating on the treatment liquid.
A fine bubble generator arranged outside the bubble tank, which is a fine bubble generator that generates fine bubbles by mixing air into the processing liquid sent from the liquid supply pump.
A separation tank connected to the bubble tank at the bottom,
A circulation pipe that returns the treatment liquid that overflows from the liquid surface of the separation tank to the tank,
It is a liquid treatment apparatus having.

本発明の第２の側面は、
タンクに貯留された、異物や油分を含む処理液に、気泡槽の外部で空気の微細気泡を混入し、
前記微細気泡が混入した前記処理液が前記気泡槽に流入し、
前記微細気泡が、前記異物や前記油分に付着して前記気泡槽内を浮上し、
前記処理液が前記気泡槽の下方から分離槽へ流入し、
前記分離槽から前記処理液を前記タンクへ循環させ、
前記気泡槽の液面の上方から前記浮上物を排出する、
液処理方法である。 The second aspect of the present invention is
Fine air bubbles are mixed outside the bubble tank into the treatment liquid containing foreign matter and oil stored in the tank.
The treatment liquid mixed with the fine bubbles flows into the bubble tank and
The fine bubbles adhere to the foreign matter and the oil and float in the bubble tank.
The treatment liquid flows into the separation tank from below the bubble tank,
The treatment liquid is circulated from the separation tank to the tank, and the treatment liquid is circulated to the tank.
The floating object is discharged from above the liquid level of the bubble tank.
This is a liquid treatment method.

気泡槽は、閉じられたタンクである。微細気泡発生器は、気泡槽の外部に設置される。微細気泡発生器は、タンクと気泡槽を接続する経路に配置される。気泡出口の下端は、処理液の液面から離間する。好ましくは、気泡出口の上端は、天板よりも低い。気泡槽の液面よりも上方に広がる空間を、気泡浮上槽と呼ぶ。排出口は、気泡槽に配置される。排出口の高さは、液面高さの近傍である。排出口の高さは、液面よりも上方でも良い。消泡ポンプは、減圧ポンプである。コアレッサは、処理液の液面下に配置される。 The bubble tank is a closed tank. The fine bubble generator is installed outside the bubble tank. The fine bubble generator is arranged in the path connecting the tank and the bubble tank. The lower end of the bubble outlet is separated from the liquid level of the treatment liquid. Preferably, the upper end of the bubble outlet is lower than the top plate. The space that extends above the liquid level of the bubble tank is called the bubble levitation tank. The outlet is arranged in a bubble tank. The height of the discharge port is near the liquid level. The height of the discharge port may be above the liquid level. The defoaming pump is a decompression pump. The corelesser is placed below the surface of the treatment liquid.

本発明の液処理装置および液処理方法によれば、高比重液の廃棄量を減少できる。 According to the liquid treatment apparatus and the liquid treatment method of the present invention, the amount of waste of high-density liquid can be reduced.

第１実施形態の液処理装置Liquid treatment apparatus of the first embodiment 第１実施形態の処理槽の一部を切断した斜視図Perspective view of a part of the treatment tank of the first embodiment cut out. 図２のＩＩＩ面による断面図Sectional view taken along the line III of FIG. 第１実施形態の液処理方法を示すフローチャートFlow chart showing the liquid treatment method of the first embodiment 第２実施形態の液処理装置Liquid treatment apparatus of the second embodiment 第２実施形態の処理槽の一部を切断した斜視図Perspective view of a part of the treatment tank of the second embodiment cut out.

（第１実施形態）
図１に示すように、本実施形態の液処理装置１０は、給液ポンプ１５、発生器（微細気泡発生器）１７、処理槽２２を有する。液処理装置１０は、逆止弁１９、絞り２１、排出弁（浮上物排出弁）４７、消泡ポンプ４５及びドレンタンク４９を有しても良い。
液処理装置１０は、タンク１１に貯留された処理液１３に含まれる異物や油分を除去する。タンク１１は、例えば、工作機械や洗浄機のタンクである。処理液１３は、例えば、水系クーラントや水系洗浄液である。異物は、例えば、切りくず、繊維くずや砥粒である。油分は、例えば、オイル、グリースである。異物や油分は、処理液１３中に混濁している。 (First Embodiment)
As shown in FIG. 1, the liquid treatment apparatus 10 of the present embodiment includes a liquid supply pump 15, a generator (fine bubble generator) 17, and a treatment tank 22. The liquid treatment device 10 may include a check valve 19, a throttle 21, a discharge valve (floating material discharge valve) 47, a defoaming pump 45, and a drain tank 49.
The liquid treatment device 10 removes foreign substances and oils contained in the treatment liquid 13 stored in the tank 11. The tank 11 is, for example, a tank for a machine tool or a washing machine. The treatment liquid 13 is, for example, a water-based coolant or a water-based cleaning liquid. Foreign matter is, for example, chips, fiber chips and abrasive grains. The oil content is, for example, oil or grease. Foreign substances and oils are turbid in the treatment liquid 13.

図２に示すように、処理槽２２は、気泡槽２３、分離槽２９、循環口３１ａ及び排出口（浮上物排出口）２３ｂを有する。処理槽２２は、天板３６、側壁３９、下方仕切り板２５、上方仕切り板２７、循環管３１、雄ねじ３１ｂ、流入口（第２の流入口）２３ａ、気泡出口４１、回収樋４３、戻し口４６及びコアレッサ２６を有しても良い。 As shown in FIG. 2, the processing tank 22 has a bubble tank 23, a separation tank 29, a circulation port 31a, and a discharge port (floating material discharge port) 23b. The treatment tank 22 includes a top plate 36, a side wall 39, a lower partition plate 25, an upper partition plate 27, a circulation pipe 31, a male screw 31b, an inflow port (second inflow port) 23a, a bubble outlet 41, a recovery gutter 43, and a return port. It may have 46 and a corelesser 26.

処理槽２２は、略直方体であり、底面２２ａを有する。例えば、処理槽２２は、タンク１１の上方に設置される。底面２２ａは、気泡槽２３と分離槽２９が共有する。底面２２ａは、水平で良い。 The treatment tank 22 is a substantially rectangular parallelepiped and has a bottom surface 22a. For example, the processing tank 22 is installed above the tank 11. The bottom surface 22a is shared by the bubble tank 23 and the separation tank 29. The bottom surface 22a may be horizontal.

分離槽２９は、上方から見て、処理槽２２の一隅に配置される。分離槽２９は、上方から見て、Ｌ字状の分離壁２９ａで気泡槽２３と分けられる。分離壁２９ａの下方は開口し、分離槽２９と気泡槽２３を接続する。 The separation tank 29 is arranged in one corner of the treatment tank 22 when viewed from above. The separation tank 29 is separated from the bubble tank 23 by an L-shaped separation wall 29a when viewed from above. The lower part of the separation wall 29a is opened to connect the separation tank 29 and the bubble tank 23.

平面ＩＩＩは、循環管３１の中心線を含む。図３に示すように、循環管３１は、分離槽２９の中央に立てて配置される。循環管３１の上方の開口が、循環口３１ａとなる。処理槽２２内に流入した処理液１３は、循環口３１ａへ溢れ出して、タンク１１へ戻る。処理液１３の液面１４の高さは、循環口３１ａによって定まる。
循環管３１は、固定管３１ｅ、雄ねじ３１ｂ、調整口３１ｃを有しても良い。固定管３１ｅは、底面２２ａから立てて配置される。雄ねじ３１ｂは、固定管３１ｅの上端部に設けられる。調整口３１ｃは、内面に雌ねじ３１ｄを有する。雄ねじ３１ｂに調整口３１ｃがねじ込まれる。循環管３１は、タンク１１と接続する。液面調整口３１ｃは、ねじ込み量によって、分離槽２９内の液面１４の高さを調整する。 Plane III includes the centerline of the circulation tube 31. As shown in FIG. 3, the circulation pipe 31 is arranged upright in the center of the separation tank 29. The opening above the circulation pipe 31 becomes the circulation port 31a. The treatment liquid 13 that has flowed into the treatment tank 22 overflows into the circulation port 31a and returns to the tank 11. The height of the liquid level 14 of the treatment liquid 13 is determined by the circulation port 31a.
The circulation pipe 31 may have a fixed pipe 31e, a male screw 31b, and an adjusting port 31c. The fixed pipe 31e is arranged upright from the bottom surface 22a. The male screw 31b is provided at the upper end of the fixed pipe 31e. The adjusting port 31c has a female screw 31d on the inner surface. The adjustment port 31c is screwed into the male screw 31b. The circulation pipe 31 is connected to the tank 11. The liquid level adjusting port 31c adjusts the height of the liquid level 14 in the separation tank 29 according to the screwing amount.

図２に示すように、気泡槽２３は、側板２３ｃ、２３ｄ、天板３６及び側壁３９を有する。側板２３ｃの上端は、天板３７より高くて良い。側板２３ｃの上端は、分離壁２９ａの上端より高くて良い。側壁３９の上端は、側板２３ｃの上端よりも低い。側壁３９は、気泡槽２３と、回収樋４３とを分離する。天板３６は、水平でも良い。天板３６の高さは、液面１４よりも確実に高い。気泡槽２３は、側板２３ｃ、側壁３９及び天板３６によって閉じられる。気泡槽２３は、液面１４の上方に、閉じられた空間である浮上室３３を有する。 As shown in FIG. 2, the bubble tank 23 has side plates 23c and 23d, a top plate 36, and a side wall 39. The upper end of the side plate 23c may be higher than the top plate 37. The upper end of the side plate 23c may be higher than the upper end of the separation wall 29a. The upper end of the side wall 39 is lower than the upper end of the side plate 23c. The side wall 39 separates the bubble tank 23 and the recovery gutter 43. The top plate 36 may be horizontal. The height of the top plate 36 is definitely higher than that of the liquid level 14. The bubble tank 23 is closed by the side plate 23c, the side wall 39, and the top plate 36. The bubble tank 23 has a levitation chamber 33, which is a closed space, above the liquid level 14.

気泡出口４１は、側壁３９の上部に配置される。気泡出口４１の下端は、液面１４より確実に上方に位置する。好ましくは、気泡出口４１の上端は、天板３６と離れている。１つ又は複数の気泡出口４１が配置されて良い。気泡出口４１は、上方から見て、分離槽２９から遠い一側面に配置されて良い。 The bubble outlet 41 is arranged above the side wall 39. The lower end of the bubble outlet 41 is reliably located above the liquid level 14. Preferably, the upper end of the bubble outlet 41 is separated from the top plate 36. One or more bubble outlets 41 may be arranged. The bubble outlet 41 may be arranged on one side surface far from the separation tank 29 when viewed from above.

上方仕切り板２７は、底面２２ａと隙間を開けて、気泡槽２３の内部に立てられる。上方仕切り板２７は、側板２３ｄと平行である。上方仕切り板２７の上端は、循環口３１ａより高い。上方仕切り板２７は、液面１４よりも上方まで延びる。
下方仕切り板２５は、底面２２ａに接して、気泡槽２３に立てられる。下方仕切り板２５は、側板２３ｄと上方仕切り板２７との間に、側板２３ｄと平行に配置される。下方仕切り板２５の上端は、循環口３１ａより低い。下方仕切り板２５の上端は、液面１４の下方に位置する。
一つ又は複数の上方仕切り板２７や一つ又は複数の下方仕切り板２５が配置されて良い。例えば、一つの下方仕切り板２５のみ配置されても良い。上方仕切り板２７と下方仕切り板２５は、交互に配置される。 The upper partition plate 27 is erected inside the bubble tank 23 with a gap from the bottom surface 22a. The upper partition plate 27 is parallel to the side plate 23d. The upper end of the upper partition plate 27 is higher than the circulation port 31a. The upper partition plate 27 extends above the liquid level 14.
The lower partition plate 25 is in contact with the bottom surface 22a and is erected in the bubble tank 23. The lower partition plate 25 is arranged between the side plate 23d and the upper partition plate 27 in parallel with the side plate 23d. The upper end of the lower partition plate 25 is lower than the circulation port 31a. The upper end of the lower partition plate 25 is located below the liquid level 14.
One or more upper partition plates 27 and one or more lower partition plates 25 may be arranged. For example, only one lower partition plate 25 may be arranged. The upper partition plate 27 and the lower partition plate 25 are arranged alternately.

回収樋４３は、側板２３ｄの上方端に接続し、気泡槽２３の外側に配置される。回収樋４３は、気泡出口４１に面して配置される。回収樋４３は、側板４３ｃ、底板４３ｂ及び回収口４３ａを有する。側板４３ｃは、側板２３ｃと連続する。側板４３ｃの上端は、側板２３ｃの上端と同じ高さでも良い。好ましくは、底板４３ｂは、回収口４３ａに向かって下方に傾斜する。回収口４３ａは、回収樋４３の底部に配置される。 The recovery gutter 43 is connected to the upper end of the side plate 23d and is arranged outside the bubble tank 23. The recovery gutter 43 is arranged so as to face the bubble outlet 41. The recovery gutter 43 has a side plate 43c, a bottom plate 43b, and a recovery port 43a. The side plate 43c is continuous with the side plate 23c. The upper end of the side plate 43c may be at the same height as the upper end of the side plate 23c. Preferably, the bottom plate 43b inclines downward toward the collection port 43a. The collection port 43a is arranged at the bottom of the collection gutter 43.

排出口２３ｂは、循環口３１ａと実質的に同じ高さに配置される。排出口２３ｂは、循環口３１ａより若干高く配置されても良い。排出弁４７は、２方弁である。排出弁４７は、例えば、手動弁、ソレノイド弁である。排出口２３ｂは、排出弁４７の一方の口と接続する。排出弁４７の他方の口は、ドレンタンク４９と接続する。 The discharge port 23b is arranged at substantially the same height as the circulation port 31a. The discharge port 23b may be arranged slightly higher than the circulation port 31a. The discharge valve 47 is a two-way valve. The discharge valve 47 is, for example, a manual valve or a solenoid valve. The discharge port 23b is connected to one port of the discharge valve 47. The other port of the discharge valve 47 is connected to the drain tank 49.

流入口２３ａは、側板２３ｄの下方端部に設置される。流入口２３ａは、底面２２ａに配置されても良い。望ましくは、流入口２３ａは、上方から見て、分離槽２９から遠い位置に配置される。例えば、流入口２３ａは、下方仕切り板２５や上方仕切り板２７よりも分離槽２９から遠い位置に配置される。 The inflow port 23a is installed at the lower end of the side plate 23d. The inflow port 23a may be arranged on the bottom surface 22a. Desirably, the inflow port 23a is arranged at a position far from the separation tank 29 when viewed from above. For example, the inflow port 23a is arranged at a position farther from the separation tank 29 than the lower partition plate 25 and the upper partition plate 27.

戻し口４６は、天板３６に設置されても良い。戻し口４６は、上下方向に延びる。戻し口４６の下端は、循環口３１ａより下方に配置されても良い。望ましくは、上方から見て、戻し口４６は、分離槽２９から遠い位置に配置される。例えば、戻し口４６は、上方から見て、下方仕切り板２５や上方仕切り板２７よりも分離槽２９から遠い位置に配置される。 The return port 46 may be installed on the top plate 36. The return port 46 extends in the vertical direction. The lower end of the return port 46 may be arranged below the circulation port 31a. Desirably, the return port 46 is arranged at a position far from the separation tank 29 when viewed from above. For example, the return port 46 is arranged at a position farther from the separation tank 29 than the lower partition plate 25 and the upper partition plate 27 when viewed from above.

コアレッサ２６は、側板２３ｄ、上方仕切り板２７、下方仕切り板２５に沿って配置される。コアレッサ２６は、複数の小板２６ａ及び連結棒２６ｂを有する。小板２６ａは、例えば、細長い長方形であり、水平方向に延びる。小板２６ａの２つの長辺は、例えば、下方に向けて折り曲げられる。小板２６ａの断面は、Ｖ字状又はＵ字状でも良い。小板２６ａは、例えば、等間隔に上下方向に並ぶ。複数の小板は、連結棒２６ｂで連結される。 The corelesser 26 is arranged along the side plate 23d, the upper partition plate 27, and the lower partition plate 25. The corelesser 26 has a plurality of small plates 26a and connecting rods 26b. The plaque 26a is, for example, an elongated rectangle that extends in the horizontal direction. The two long sides of the small plate 26a are bent downward, for example. The cross section of the small plate 26a may be V-shaped or U-shaped. The small plates 26a are arranged in the vertical direction at equal intervals, for example. The plurality of small plates are connected by a connecting rod 26b.

給液ポンプ１５は、給液口１５ａ及び吐出口１５ｂを有する。給液ポンプ１５は、例えば、渦巻きポンプ、空気圧駆動式のダイヤフラムポンプである。給液ポンプ１５は、タンク１１に配置されても良い。吐出口１５ｂは、発生器１７を介して、流入口２３ａに接続される。給液口１５ａは、タンク１１に接続する。 The liquid supply pump 15 has a liquid supply port 15a and a discharge port 15b. The liquid supply pump 15 is, for example, a centrifugal pump or a pneumatically driven diaphragm pump. The liquid supply pump 15 may be arranged in the tank 11. The discharge port 15b is connected to the inflow port 23a via the generator 17. The liquid supply port 15a is connected to the tank 11.

発生器１７は、例えば、既知の微細気泡発生器である。発生器１７は、例えば、空気せん断型である。望ましくは、発生器１７は、２０μｍないし５０μｍの気泡を生成する。発生器１７は、気泡槽２３の外部に配置される。発生器１７は、空気流入口１７ｅ、処理液流入口１７ｆ及び流出口（第２の流出口）１７ｇを有する。好ましくは、空気流入口１７ｅは、逆止弁１９及び絞り２１を介して、外気と接続する。逆止弁１９は、流入口（第１の流入口）１９ａ及び流出口（第１の流出口）１９ｂを有する。流入口１９ａは、絞り２１と接続する。流出口１９ｂは、空気流入口１７ｅと接続する。逆止弁１９は、空気流入口１７ｅから処理液が外気へ排出されないようにする。処理液流入口１７ｆは、吐出口１５ｂと接続する。流出口１７ｇは、流入口２３ａと接続する。 The generator 17 is, for example, a known fine bubble generator. The generator 17 is, for example, an air shear type. Desirably, the generator 17 produces bubbles of 20 μm to 50 μm. The generator 17 is arranged outside the bubble tank 23. The generator 17 has an air inlet 17e, a treatment liquid inlet 17f, and an outlet (second outlet) 17g. Preferably, the air inlet 17e is connected to the outside air via the check valve 19 and the throttle 21. The check valve 19 has an inflow port (first inflow port) 19a and an outflow port (first outflow port) 19b. The inflow port 19a is connected to the throttle 21. The outflow port 19b is connected to the air inflow port 17e. The check valve 19 prevents the treatment liquid from being discharged to the outside air from the air inlet 17e. The treatment liquid inflow port 17f is connected to the discharge port 15b. The outflow port 17g is connected to the inflow port 23a.

消泡ポンプ４５は、吸入口４５ａ及び吐出口４５ｂを有する。消泡ポンプ４５は、例えば、エジェクターポンプ、ダイヤフラムポンプ、ロータリーポンプである。吸入口４５ａは、回収口４３ａと接続する。吐出口４５ｂは、戻し口４６と接続する。
なお、気泡出口４１、回収樋４３、消泡ポンプ４５及び戻し口４６は、省いても良い。 The defoaming pump 45 has a suction port 45a and a discharge port 45b. The defoaming pump 45 is, for example, an ejector pump, a diaphragm pump, or a rotary pump. The suction port 45a is connected to the collection port 43a. The discharge port 45b is connected to the return port 46.
The bubble outlet 41, the recovery gutter 43, the defoaming pump 45, and the return port 46 may be omitted.

図１及び図４に従って、液処理方法を説明する。
給液ポンプ１５は、タンク１１から処理液１３を発生器１７へ送る。発生器１７は、空気流入口１７ｅから空気を吸い込み、処理液１３に空気を微細気泡として混入する（Ｓ１）。
微細気泡が混入した処理液１３は、流入口２３ａから気泡槽２３に流入する（Ｓ２）。
微細気泡が処理液１３中の油分や異物に付着する（Ｓ３）。
処理液１３は、下方仕切り板２５の上方や上方仕切り板２７の下方をくぐりながら気泡槽２３を流れる。微細気泡が付着した油分や異物が、気泡槽２３内を浮上する（Ｓ４）。 The liquid treatment method will be described with reference to FIGS. 1 and 4.
The liquid supply pump 15 sends the processing liquid 13 from the tank 11 to the generator 17. The generator 17 sucks air from the air inlet 17e and mixes the air into the processing liquid 13 as fine bubbles (S1).
The treatment liquid 13 mixed with fine bubbles flows into the bubble tank 23 from the inflow port 23a (S2).
Fine bubbles adhere to oil and foreign matter in the treatment liquid 13 (S3).
The treatment liquid 13 flows through the bubble tank 23 while passing above the lower partition plate 25 and below the upper partition plate 27. Oil and foreign matter to which fine bubbles are attached float in the bubble tank 23 (S4).

気泡が付着した油分や異物が、互いに結合する（Ｓ５）。処理液１３がコアレッサ２６を通過するときに、処理液１３の流れが乱れる。気泡が付着した油分や異物が小板２６ａに衝突し、又は気泡が付着した油分や異物が互いに接触し、油分や異物の結合が促進される。
油分や異物は、気泡と共に浮上室３３に浮上物として浮遊する。浮上物が浮上室３３を満たすと、浮上物は気泡出口４１から溢れ出す。溢れた浮上物は、回収樋４３に回収される（Ｓ６）。
消泡ポンプ４５は、回収された浮上物を吸い込む。浮上物中の気泡は、減圧によって潰れ、消滅する。消泡された浮上物は、戻し口４６から気泡槽２３に流入する（Ｓ７）。 Oil and foreign matter to which air bubbles are attached bind to each other (S5). When the treatment liquid 13 passes through the corelesser 26, the flow of the treatment liquid 13 is disturbed. The oil or foreign matter with air bubbles collides with the small plate 26a, or the oil or foreign matter with air bubbles comes into contact with each other, and the binding of oil or foreign matter is promoted.
Oil and foreign matter float together with air bubbles in the floating chamber 33 as floating objects. When the floating object fills the floating chamber 33, the floating object overflows from the bubble outlet 41. The overflowing floating matter is collected in the collection gutter 43 (S6).
The defoaming pump 45 sucks in the collected floating material. Bubbles in the floating object are crushed and disappear by decompression. The defoamed floating material flows into the bubble tank 23 from the return port 46 (S7).

処理液１３は、分離壁２９ａの下方から分離槽２９へ流入する（Ｓ１１）。
処理液１３は、循環口３１ａへ溢れ出し、循環管３１を通ってタンク１１へ循環する（Ｓ１２）。
排出弁４７が開弁し、浮上物は排出口２３ｂから排出される（Ｓ２１）。排出弁４７は、例えば、５００時間毎に開弁し、浮上物を排出する。
ステップＳ１〜Ｓ７、Ｓ１１及びＳ１２は、連続して実行される。また、ステップＳ６、Ｓ７は、省略しても良い。 The treatment liquid 13 flows into the separation tank 29 from below the separation wall 29a (S11).
The treatment liquid 13 overflows to the circulation port 31a and circulates to the tank 11 through the circulation pipe 31 (S12).
The discharge valve 47 opens, and the floating material is discharged from the discharge port 23b (S21). The discharge valve 47 opens, for example, every 500 hours to discharge the floating object.
Steps S1 to S7, S11 and S12 are executed consecutively. Further, steps S6 and S7 may be omitted.

気泡出口４１から溢れ出した浮上物は、回収樋４３に回収され、消泡されて気泡槽２３に戻される。そのため、排出口２３ｂから排出される浮上物に含まれる処理液１３が減少する。
気泡槽２３が閉じられているため、気泡の消滅が促進される。側板２３ｃが天板３６より上方まで延びるため、気泡出口４１からあふれ出た気泡が処理槽２２から溢れ出すことが抑制される。 The floating material overflowing from the bubble outlet 41 is collected in the recovery gutter 43, defoamed, and returned to the bubble tank 23. Therefore, the treatment liquid 13 contained in the floating material discharged from the discharge port 23b is reduced.
Since the bubble tank 23 is closed, the disappearance of bubbles is promoted. Since the side plate 23c extends above the top plate 36, it is possible to prevent the bubbles overflowing from the bubble outlet 41 from overflowing from the processing tank 22.

（第２実施形態）
図５及び６に示すように、本実施形態の液処理装置１００は、処理槽１２２を有する。処理槽１２２は、第１天板３５、第２天板３７、側板２３ｅ及び側壁１３９を有する。 (Second Embodiment)
As shown in FIGS. 5 and 6, the liquid treatment apparatus 100 of the present embodiment has a treatment tank 122. The processing tank 122 has a first top plate 35, a second top plate 37, a side plate 23e, and a side wall 139.

側板２３ｅは、気泡槽２３と回収樋４３とを区画する。側板２３ｅの上端は、側板２３ｃの上端よりも低い。 The side plate 23e partitions the bubble tank 23 and the recovery gutter 43. The upper end of the side plate 23e is lower than the upper end of the side plate 23c.

第１天板３５と第２天板３７は、気泡槽２３の上方を覆う。
第１天板３５は、側板２３ｅの上端から、処理槽１２２の中央に向かって高くなるように傾斜する。第１天板３５は、側板２３ｅと接続する。
第２天板３７は、処理槽１２２の中央部において、第１天板３５よりも高く配置される。第２天板３７は、側板２３ｄから遠い地点が下方になるように傾斜して良い。第２天板３７は、分離壁２９ａと接続する。第２天板３７は、確実に液面１４と離間している。 The first top plate 35 and the second top plate 37 cover the upper part of the bubble tank 23.
The first top plate 35 is inclined so as to be higher from the upper end of the side plate 23e toward the center of the processing tank 122. The first top plate 35 is connected to the side plate 23e.
The second top plate 37 is arranged higher than the first top plate 35 in the central portion of the processing tank 122. The second top plate 37 may be inclined so that the point far from the side plate 23d is downward. The second top plate 37 is connected to the separation wall 29a. The second top plate 37 is surely separated from the liquid level 14.

気泡出口４１は、第１天板３５の上方、かつ、第２天板３７の下方に配置される。気泡出口４１は、循環口３１ａよりも上方に位置する。第１天板３５と第２天板の間に、側壁１３９が配置されてよい。気泡出口４１は、側壁１３９に配置されてよい。例えば、第１天板３５と第２天板３７の間に、上下に幅の狭い側壁１３９が配置され、側壁１３９に水平方向に長く延びる複数の気泡出口４１が配置される。側壁１３９は、第１天板３５と第２天板３７を保持する。
戻し口４６は、第１天板３５に設置されても良い。 The bubble outlet 41 is arranged above the first top plate 35 and below the second top plate 37. The bubble outlet 41 is located above the circulation port 31a. A side wall 139 may be arranged between the first top plate 35 and the second top plate. The bubble outlet 41 may be arranged on the side wall 139. For example, between the first top plate 35 and the second top plate 37, side walls 139 having a narrow width are arranged vertically, and a plurality of bubble outlets 41 extending in the horizontal direction are arranged on the side wall 139. The side wall 139 holds the first top plate 35 and the second top plate 37.
The return port 46 may be installed on the first top plate 35.

図４を参照して、液処理方法を説明する。浮上した油分や異物は、気泡と共に液面１４の上方に浮上物として浮遊する。浮上物が浮上室３３を満たすと、浮上物は気泡出口４１から溢れ出す。溢れた浮遊物は、第１天板３５の上面を流れ落ち、回収樋４３に回収される（Ｓ６）。
その他のステップは、第１実施形態と同様である。 The liquid treatment method will be described with reference to FIG. The floating oil and foreign matter float above the liquid surface 14 as floating objects together with air bubbles. When the floating object fills the floating chamber 33, the floating object overflows from the bubble outlet 41. The overflowing suspended matter flows down the upper surface of the first top plate 35 and is collected in the collection gutter 43 (S6).
The other steps are the same as in the first embodiment.

なお、本発明は前述した実施形態に限定されず、本発明の要旨を逸脱しない範囲で種々の変形が可能であり、特許請求の範囲に記載された技術思想に含まれる技術的事項の全てが本発明の対象となる。前記実施形態は、好適な例を示したものであるが、当業者ならば、本明細書に開示の内容から、各種の代替例、修正例、変形例あるいは改良例を実現することができ、これらは添付の特許請求の範囲に記載された技術的範囲に含まれる。 The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention, and all the technical matters included in the technical idea described in the claims are all. It is the subject of the present invention. Although the above-described embodiment shows a suitable example, those skilled in the art can realize various alternative examples, modified examples, modified examples, or improved examples from the contents disclosed in the present specification. These are included in the technical scope described in the appended claims.

１０ 液処理装置
１１ タンク
１３ 処理液
１７ 発生器（気泡発生器）
２３ 気泡槽
２３ｂ 排出口（浮上物排出口）
２９ 分離槽
４３ 回収樋
４５ 消泡ポンプ
３１ａ 循環口 10 Liquid treatment equipment 11 Tank 13 Treatment liquid 17 Generator (air bubble generator)
23 Bubble tank 23b Discharge port (floating object discharge port)
29 Separation tank 43 Recovery gutter 45 Defoaming pump 31a Circulation port

Claims (11)

タンクに貯留された処理液を送る給液ポンプと、
前記処理液が流入する気泡槽であって、
前記処理液の液面の近傍に配置され、前記処理液上に浮上した浮上物を排出する浮上物排出口と、
上部に配置された気泡出口と、を有する、気泡槽と、
前記気泡槽の外部に配置される微細気泡発生器であって、前記給液ポンプから送られた前記処理液に空気を混入させて微細気泡を発生する微細気泡発生器と、
前記気泡槽と下部で接続する分離槽と、
前記分離槽の前記液面から溢れ出す前記処理液を前記タンクへ戻す循環管と、
前記気泡出口の下方に配置され、前記気泡出口から排出した前記浮上物を回収する回収樋と、
前記回収樋に接続される吸入口と、前記気泡槽に接続される吐出口を有する消泡ポンプと、
を有する液処理装置。 A liquid supply pump that sends the processing liquid stored in the tank,
A bubble tank into which the treatment liquid flows.
A floating material discharge port that is arranged near the liquid surface of the treatment liquid and discharges a floating material that has floated on the treatment liquid.
With a bubble tank , which has a bubble outlet located at the top,
A fine bubble generator arranged outside the bubble tank, which is a fine bubble generator that generates fine bubbles by mixing air into the processing liquid sent from the liquid supply pump.
A separation tank connected to the bubble tank at the bottom,
A circulation pipe that returns the treatment liquid that overflows from the liquid surface of the separation tank to the tank,
A recovery gutter that is placed below the bubble outlet and collects the floating material discharged from the bubble outlet.
A defoaming pump having a suction port connected to the recovery gutter and a discharge port connected to the bubble tank.
Liquid treatment equipment with. 大気に解放される第１の流入口と、第１の流出口とを有する逆止弁を更に有し、
前記気泡槽は、下部に配置された第２の流入口を有し、
前記微細気泡発生器は、
前記給液ポンプと接続される処理液流入口と、
前記第１の流出口と接続される空気流入口と、
空気流入口及び前記第２の流入口と接続される第２の流出口と、を有する、
請求項１に記載の液処理装置。 It further has a check valve with a first inlet and a first outlet that are open to the atmosphere.
The bubble tank has a second inlet located at the bottom and has a second inlet.
The fine bubble generator
The processing liquid inflow port connected to the liquid supply pump and
An air inlet connected to the first outlet,
It has an air inlet and a second outlet connected to the second inlet.
The liquid treatment apparatus according to claim 1. 前記浮上物排出口に接続する浮上物排出弁を更に有する、
請求項１又は２に記載の液処理装置。 Further having a levitation discharge valve connected to the levitation discharge port.
The liquid treatment apparatus according to claim 1 or 2. 前記気泡槽に配置される下方仕切り板であって、
前記気泡槽の底面と接する下端と、
前記気泡槽の前記液面の近傍で前記液面の下方に位置する上端と、
を有する下方仕切り板と、
前記気泡槽に配置される上方仕切り板であって、
前記液面の上方に位置する上端と、
前記底面の近傍で前記底面の上方に位置する下端と、
を有する上方仕切り板と、を更に有する、
請求項１〜３のいずれかに記載の液処理装置。 A lower partition plate arranged in the bubble tank.
The lower end in contact with the bottom surface of the bubble tank and
An upper end located below the liquid level in the vicinity of the liquid level in the bubble tank, and
With a lower partition plate,
An upper partition plate arranged in the bubble tank.
The upper end located above the liquid level and
A lower end located near the bottom surface and above the bottom surface,
With an upper partition plate, and further
The liquid treatment apparatus according to any one of claims 1 to 3. 前記気泡槽に配置されるコアレッサであって、水平方向に延びて、互いに隙間を設けて上下方向に配置された複数の小板を有するコアレッサを更に有する、
請求項１〜４のいずれかに記載の液処理装置。 A corelesser arranged in the bubble tank, further comprising a corelesser extending in the horizontal direction and having a plurality of small plates arranged in the vertical direction with a gap between them.
The liquid treatment apparatus according to any one of claims 1 to 4. 前記気泡槽は、側壁を有し、
前記気泡出口は、前記側壁上に配置される、
請求項１〜５のいずれかに記載の液処理装置。 The bubble tank has a side wall and has a side wall.
The bubble outlet is located on the side wall.
The liquid treatment apparatus according to any one of claims 1 to 5. 前記気泡出口は、前記液面から離間するように、前記気泡槽の上部に配置される、
請求項１〜６のいずれかに記載の液処理装置。 The bubble outlet is arranged at the top of the bubble tank so as to be separated from the liquid surface.
The liquid treatment apparatus according to any one of claims 1 to 6. 前記回収樋は、前記回収樋の下方に配置され、前記吸入口と接続する回収口を有する、
請求項１〜７のいずれかに記載の液処理装置。 The recovery gutter is arranged below the recovery gutter and has a recovery port connected to the suction port.
The liquid treatment apparatus according to any one of claims 1 to 7. 前記気泡槽は、
前記回収樋から前記気泡槽の中央に向かってせり上がる第１天板と、
前記回収樋の反対側に配置され、前記気泡槽の中央部で前記第１天板の上方に位置する第２天板と、を有し、
前記気泡出口は、前記第１天板と前記第２天板の間に配置される、
請求項１〜８のいずれかに記載の液処理装置。 The bubble tank
A first top plate that rises from the recovery gutter toward the center of the bubble tank,
It has a second top plate located on the opposite side of the recovery gutter and located above the first top plate in the central portion of the bubble tank.
The bubble outlet is arranged between the first top plate and the second top plate.
The liquid treatment apparatus according to any one of claims 1 to 8. タンクに貯留された、異物や油分を含む処理液に、気泡槽の外部で空気の微細気泡を混入し、
前記微細気泡が混入した前記処理液が前記気泡槽に流入し、
前記微細気泡が、前記異物や前記油分に付着して前記気泡槽内を浮上し、
前記処理液が前記気泡槽の下方から分離槽へ流入し、
前記分離槽から前記処理液を前記タンクへ循環させ、
前記気泡槽の液面の上方から浮上物を排出する、
浮上した前記微細気泡と、前記異物や前記油分と、前記処理液を含む前記浮上物が前記気泡槽を満たし、気泡出口から溢れ出し、
前記浮上物が回収樋に回収され、
前記回収樋で回収された前記浮上物の気泡が潰されて、前記気泡槽に戻される、
液処理方法。 Fine air bubbles are mixed outside the bubble tank into the treatment liquid containing foreign matter and oil stored in the tank.
The treatment liquid mixed with the fine bubbles flows into the bubble tank and
The fine bubbles adhere to the foreign matter and the oil and float in the bubble tank.
The treatment liquid flows into the separation tank from below the bubble tank,
The treatment liquid is circulated from the separation tank to the tank, and the treatment liquid is circulated to the tank.
Floating material is discharged from above the liquid level of the bubble tank.
The floating fine bubbles, the foreign matter and the oil, and the floating substance containing the treatment liquid fill the bubble tank and overflow from the bubble outlet.
The floating object is collected in the collection gutter,
The bubbles of the floating material collected by the recovery gutter are crushed and returned to the bubble tank.
Liquid treatment method. 前記微細気泡が付着した前記異物や前記油分が小板に衝突して結合する、
請求項１０に記載の液処理方法。 The foreign matter and the oil to which the fine bubbles are attached collide with the small plate and bond with each other.
The liquid treatment method according to claim 10.
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