JP5548412B2 - Oil / water separator - Google Patents

Oil / water separator Download PDF

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JP5548412B2
JP5548412B2 JP2009205438A JP2009205438A JP5548412B2 JP 5548412 B2 JP5548412 B2 JP 5548412B2 JP 2009205438 A JP2009205438 A JP 2009205438A JP 2009205438 A JP2009205438 A JP 2009205438A JP 5548412 B2 JP5548412 B2 JP 5548412B2
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oil
liquid
water separator
floating
treatment tank
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JP2011056332A (en
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二郎 江原
亮 野澤
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Hitachi Industrial Equipment Systems Co Ltd
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Description

本発明は油と水の混合された液体から油と水を分離するための油水分離装置に関し、特に、微細気泡による浮上分離法を用いた油水分離装置に関するものである。   The present invention relates to an oil / water separator for separating oil and water from a mixed liquid of oil and water, and more particularly to an oil / water separator using a floating separation method using fine bubbles.

微細気泡による浮上分離法による分離装置として、下記の特許文献１に記載されるように、複数の槽を経由して処理する方法、および特許文献２に記載されるように、一つの槽で処理する方法がある。   As a separation apparatus based on a floating separation method using fine bubbles, a method of processing via a plurality of tanks as described in Patent Document 1 below, and a single tank as described in Patent Document 2 There is a way to do it.

特許第３０９２０１３号公報Japanese Patent No. 3092013 特許第４１１７１６５号公報Japanese Patent No. 4117165

上記特許文献１においては、複雑な制御を不要とするために複数の槽を用いることが必要になる。   In the said patent document 1, in order to make complicated control unnecessary, it is necessary to use a some tank.

特許文献２においては、一つの槽で処理するために被処理液を吸引する工程、油水分離する工程、処理済液を排水する工程を電磁弁とポンプの制御によって行っている。   In Patent Document 2, the process of sucking the liquid to be processed, the process of separating oil and water, and the process of draining the processed liquid are performed by controlling the solenoid valve and the pump for processing in one tank.

これら従来技術では、被処理液の投入から処理済液の排水、浮上油分の排出までを行うには、大規模な装置や複雑な制御が必要になる。   In these prior arts, a large-scale apparatus and complicated control are required to perform from the input of the liquid to be processed to the drainage of the processed liquid and the discharge of the floating oil.

それゆえ本発明の目的は、一つの槽で複雑な制御なしに被処理液の投入から処理済液の排水、浮上油の排出までを行う油水分離装置を提供することにある。   Therefore, an object of the present invention is to provide an oil / water separation apparatus that performs from the input of the liquid to be processed to the drainage of the processed liquid and the discharge of the floating oil in one tank without complicated control.

また、本発明の別の目的として、浮上油の回収を簡素な構成で可能とし、コンパクトな油水分離装置を提供することにある。   Another object of the present invention is to provide a compact oil-water separator that enables the recovery of floating oil with a simple configuration.

上記の目的のいずれかを達成するための手段を以下、説明する。   Means for achieving any of the above objects will be described below.

上記目的を達成するために、被処理液に空気を供給し、ポンプで加圧して被処理液に空気を溶解させ、溶解させた空気を気泡として被処理液とともに吹き出させることによって、該処理槽において被処理液に含まれる油分を気泡とともに浮上させ該被処理液を水と油分とに分離させる油水分離装置において、本発明では、該処理槽の上方から被処理液を供給する供給口と、該供給口より下部に設けられ、供給口からの被処理液の供給方向に対し、概略水平方向に前記気泡と被処理液を放射状に吹き出すノズルと、該ノズル位置よりも下部に設けられる排水口と、該排水口より高い位置であって該処理槽上端よりも低い位置に設けられる外部排水口と、該排水口と該外部排水口とを連結する排水管とを備える構成とした。 To achieve the above object, by supplying air, pressurized by the pump by dissolving air into the liquid to be treated, then blowing with the liquid to be treated air was dissolve as bubbles in the liquid to be treated, the processing In the oil-water separator that floats the oil contained in the liquid to be treated together with bubbles in the tank and separates the liquid to be treated into water and oil, in the present invention, in the present invention, , provided at a lower portion than said supply port, to the feed direction of the liquid to be treated from the supply port, a nozzle for blowing radially the bubble and the liquid to be treated in general horizontal direction, it is provided on the lower than 該No nozzle position A drain outlet, an external drain outlet provided at a position higher than the drain outlet and lower than the upper end of the treatment tank, and a drain pipe connecting the drain outlet and the external drain outlet are provided.

上記の本発明の構成において、より好適な具体的態様は下記の通りである。
（１）該処理槽に上方から被処理液を供給する供給口を有すること。
（２）該処理槽内に浮上油回収機構を備え、該浮上油回収機構の浮上油回収開口の上端を該外部排水口よりも高く位置させたこと。
（３）該浮上油回収開口を上下可動としたこと。
（４）該浮上油回収開口から下方に延伸する排油管と、該排油管を流下した油を排出する油排出口とを備え、該排油管は該処理槽に対して固定され、該排油管と該浮上油回収開口との間が可動体の仕切り部材で連結されること。
（５）該浮上油回収開口は該処理槽の液面に、水よりも比重が小さく油より比重の大きいフロートを有し，該浮上油回収機構の浮上油回収開口として用いること。
（６）比重が小さく油より比重の大きいフロートと、該浮上油回収機構によって回収された油の流通路となる排油管とを有し、該処理槽内の被処理液と該排油管とを仕切る仕切り部材を該フロートと連結すること。
（７）該排水管は、上端を該処理槽より低くするとともに、該処理槽に隣り合わせて配置すること。 In the above-described configuration of the present invention, more preferable specific embodiments are as follows.
(1) It has a supply port for supplying the liquid to be processed to the processing tank from above.
(2) A floating oil recovery mechanism is provided in the treatment tank, and the upper end of the floating oil recovery opening of the floating oil recovery mechanism is positioned higher than the external drainage port.
(3) The floating oil recovery opening is movable up and down.
(4) An oil drain pipe extending downward from the floating oil recovery opening and an oil exhaust port for discharging oil flowing down the oil drain pipe, the oil drain pipe being fixed to the treatment tank, and the oil drain pipe And the floating oil recovery opening are connected by a partition member of the movable body.
(5) The floating oil recovery opening has a float having a specific gravity smaller than that of water and greater than that of oil on the liquid surface of the treatment tank, and is used as a floating oil recovery opening of the floating oil recovery mechanism.
(6) A float having a specific gravity smaller than that of oil and a specific gravity greater than that of the oil, and an oil drain pipe serving as a flow passage for the oil recovered by the floating oil recovery mechanism, and the liquid to be processed in the processing tank and the oil exhaust pipe Connecting a partition member to the float;
(7) The drain pipe has an upper end lower than the treatment tank and is disposed adjacent to the treatment tank.

本発明によれば、複雑な制御なしに被処理液の投入から処理済液の排水、浮上油の排出までを行う油水分離方法および油水分離装置を提供することができる。または、浮上油の回収を簡素な構成で可能とし、コンパクトな油水分離装置を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the oil-water separation method and oil-water separation apparatus which perform from the injection of a to-be-processed liquid to the drainage of a processed liquid, and discharge | emission of floating oil without complicated control can be provided. Alternatively, the floating oil can be collected with a simple configuration, and a compact oil-water separator can be provided.

本発明の一実施形態を示す油水分離装置の全体系統図である。1 is an overall system diagram of an oil / water separator according to an embodiment of the present invention. 油水分離装置を圧縮機ドレンへ適用した例を示す図である。It is a figure which shows the example which applied the oil-water separator to the compressor drain.

以下、図面を用いて本発明の実施形態を説明する。図１は、本実施形態の油水分離装置の要部を示す全体系統図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall system diagram showing a main part of the oil / water separator according to the present embodiment.

本実施形態の油水分離装置は、油水分離の対象となる被処理液（ドレン）が溜められる処理槽１を備えており、処理槽１内に溜められたドレンに微細気泡を供給することによって、油分を浮上させる構成となっている。   The oil / water separator of this embodiment includes a treatment tank 1 in which a liquid to be treated (drain) to be subjected to oil / water separation is stored, and by supplying fine bubbles to the drain stored in the treatment tank 1, It is configured to float oil.

処理槽１の底部には吸引口６が設けられ、この吸引口６には配管７ａが接続されている。配管７ａはポンプ２に接続され、ポンプ２の下流側は配管７ｂを介して処理槽１に連結されている。すなわち、配管７ａ、７ｂは循環配管を構成する部分配管となっている。   A suction port 6 is provided at the bottom of the processing tank 1, and a pipe 7 a is connected to the suction port 6. The pipe 7a is connected to the pump 2, and the downstream side of the pump 2 is connected to the processing tank 1 through the pipe 7b. That is, the pipes 7a and 7b are partial pipes constituting the circulation pipe.

配管７ａには、外部より空気が供給される吸気配管４が連結されている。吸気配管４は、ポンプ２の上流側である部分配管７ａに一端が接続される一方、その他端側、すなわち、空気を取り込む開口端は、微細な気泡を発生させるのに必要な空気量に調整するための空気量調整弁３を設け、処理槽１に溜められる被処理液の最上位液面より高い位置において開放させるように設けられている。   An intake pipe 4 to which air is supplied from the outside is connected to the pipe 7a. One end of the intake pipe 4 is connected to the partial pipe 7a on the upstream side of the pump 2, while the other end side, that is, the opening end for taking in air is adjusted to the amount of air necessary for generating fine bubbles. An air amount adjusting valve 3 is provided for opening the liquid at a position higher than the uppermost liquid level of the liquid to be processed stored in the processing tank 1.

また、配管７ｂの下流側端部には、処理槽１に気泡を供給するためのノズル５が設けられている。ノズル５は開口の絞りによって配管７ｂ内を加圧するとともに被処理液を放射状に噴射する型式のものを用いる。   A nozzle 5 for supplying bubbles to the processing tank 1 is provided at the downstream end of the pipe 7b. The nozzle 5 is of a type that pressurizes the inside of the pipe 7b with an aperture stop and injects the liquid to be treated radially.

上記の構成を備えたことにより、ポンプ２が駆動されると、空気量調整弁３、吸気配管４を経て、配管７ａに適量の空気が吸引され、配管７ｂで加圧されることにより被処理液中に溶け込んだ空気が、ノズル５から噴射される。このとき、大気圧に減圧されることで微細な気泡が処理槽１内に供給される。その結果、処理槽１内のドレンの油水分離が行われる。   With the above configuration, when the pump 2 is driven, an appropriate amount of air is sucked into the pipe 7a through the air amount adjusting valve 3 and the intake pipe 4, and pressurized by the pipe 7b. Air dissolved in the liquid is ejected from the nozzle 5. At this time, fine bubbles are supplied into the processing tank 1 by reducing the pressure to atmospheric pressure. As a result, oil / water separation of the drain in the processing tank 1 is performed.

被処理液は、処理槽１の上部に設けられる供給口１１から処理槽１内に供給される。処理槽１内にドレンが溜められた後、ポンプ２を駆動する油水分離運転が行われると、ドレン中の油分が被処理液の上方に浮上する。油水分離運転によって浮上した油分の回収は、浮上油回収機構（符号１２、１３、１４、１６で示される。）によって行われる。   The liquid to be processed is supplied into the processing tank 1 from a supply port 11 provided in the upper part of the processing tank 1. When drainage is stored in the treatment tank 1 and an oil-water separation operation for driving the pump 2 is performed, the oil in the drain floats above the liquid to be treated. Recovery of the oil component that has floated by the oil-water separation operation is performed by a floating oil recovery mechanism (indicated by reference numerals 12, 13, 14, and 16).

浮上油回収機構について説明する。本実施形態の浮上油回収機構は、処理槽１内に設けられ、回収される油の排出路となる排油管１２と、排油管１２へ浮上油を導く開口として機能するフロート１４と、排油管１２とフロート１４とを連結するとともに処理槽１内の被処理液と油の排出路とを仕切る仕切り部材１３と、排油管１２に導かれた回収油を外部に排出する油排出口１６とを備えて構成される。これらの回収機構により、分離された油が外部へと排出される。   The floating oil recovery mechanism will be described. The floating oil recovery mechanism according to the present embodiment is provided in the processing tank 1 and includes a drain pipe 12 that serves as a discharge path for recovered oil, a float 14 that functions as an opening that guides the floating oil to the drain pipe 12, and a drain pipe. 12 and the float 14, and a partition member 13 that partitions the liquid to be treated and the oil discharge path in the processing tank 1, and an oil discharge port 16 that discharges the recovered oil led to the oil drain pipe 12 to the outside. It is prepared for. By these recovery mechanisms, the separated oil is discharged to the outside.

一方、油分が分離された処理済液は処理槽１の下部に設けられた排水口８より配水管９を経て、外部排水口１０から外部に排水される。排水口８、排水管９、外部排水口１０の構造、特に位置関係に関しては後に説明を加えるが、本実施形態の油水分離装置は処理槽１内の被処理液の水位を一定に保つことを目的としているため、これを満たす高さに外部排出口１０を設定している。   On the other hand, the treated liquid from which the oil component has been separated is drained from the external drainage port 10 to the outside through the water distribution pipe 9 from the drainage port 8 provided in the lower part of the treatment tank 1. The structure of the drain port 8, drain pipe 9, and external drain port 10, especially the positional relationship will be described later, but the oil / water separator according to this embodiment maintains the water level of the liquid to be treated in the treatment tank 1 constant. Since it is the purpose, the external discharge port 10 is set to a height that satisfies this.

当該構成を備えることで、次のように油が回収される。分離されて浮上した油（図１の符号１５は浮上油を示す。）は、フロート１４より排油管１２へと導かれる。本実施形態の排油管１２は処理槽１の底部から上方に立ち上って形成されているため、排油路の始端となるフロート１４の開口よりも浮上油の油面が高い場合、浮上油が排油管１２へと流下していくことになる。   By providing the said structure, oil is collect | recovered as follows. The separated and floated oil (reference numeral 15 in FIG. 1 indicates the floated oil) is guided from the float 14 to the oil drain pipe 12. The oil drain pipe 12 of the present embodiment is formed so as to rise upward from the bottom of the treatment tank 1. Therefore, when the oil level of the floating oil is higher than the opening of the float 14 that is the starting end of the oil drain passage, the floating oil is discharged. It will flow down to the oil pipe 12.

浮上油は比重が水よりも軽いため、処理槽１内の油面は、基準となる外部排出口１０の高さ（図１に破線で表示）よりも高くなる。したがって、フロート１４の上端の開口部高さは図１破線よりも高く設定しておくことで、分離された浮上油を効率よく回収することができる。   Since the specific gravity of the floating oil is lighter than that of water, the oil level in the treatment tank 1 is higher than the height of the reference external discharge port 10 (indicated by a broken line in FIG. 1). Therefore, by setting the opening height at the upper end of the float 14 higher than the broken line in FIG. 1, the separated floating oil can be efficiently recovered.

被処理液が供給口１１から処理槽１に供給されても、その供給分だけ水が外部排出口１０から排出されるので、処理槽１内の液位はほぼ一定に保持されるが、一時的な変動は生じ得るため、短期的には必ずしも一定にはならない。そこで、本実施形態では次の構成を採用している。   Even if the liquid to be treated is supplied from the supply port 11 to the treatment tank 1, water is discharged from the external discharge port 10 by the amount of supply, so that the liquid level in the treatment tank 1 is kept almost constant, but temporarily Fluctuations can occur and are not necessarily constant in the short term. Therefore, the following configuration is employed in the present embodiment.

フロート１４は比重０．９の素材で作成されている。すなわち、油水分離前の被処理液（比重：約１．０）と浮上油（比重：約０．８５）の中間の比重を有する素材を用いている。したがって、フロート１４は、油水分離前の被処理液中では液上に浮いた状態となるが、浮上油中では沈む。このため、フロート１４の開口部よりも高い位置にある油分は、排油管１２を経て浮上油排油口１６から排出される。   The float 14 is made of a material having a specific gravity of 0.9. That is, a material having a specific gravity intermediate between the liquid to be treated (specific gravity: about 1.0) and the floating oil (specific gravity: about 0.85) before oil-water separation is used. Accordingly, the float 14 floats on the liquid in the liquid to be treated before oil-water separation, but sinks in the floating oil. For this reason, the oil in a position higher than the opening of the float 14 is discharged from the floating oil discharge port 16 through the oil discharge pipe 12.

また、フロート１４の上下動を可能とするため、仕切り部材１３を伸縮可能な構成としている。例えば、膜状の可動体、蛇腹状部材等が好適である。これにより、フロート１４は被処理液あるいは分離後の水には開口せず、開口部が液面内に位置しても、必ず浮上油１５の堆積範囲内となる。したがって、浮上油回収機構によって浮上油１５を確実に回収することができる。   Moreover, in order to enable the float 14 to move up and down, the partition member 13 is configured to be extendable and contractible. For example, a film-like movable body, a bellows-like member, and the like are suitable. As a result, the float 14 does not open to the liquid to be treated or the water after separation, and is always within the accumulation range of the floating oil 15 even if the opening is located within the liquid surface. Therefore, the floating oil 15 can be reliably recovered by the floating oil recovery mechanism.

次に、油分が分離された処理済液の経路（排水経路）について説明する。処理槽１の下部には排水口８が設けられている。排水口８の位置は、被処理液が供給される供給口１１及び浮上油が回収されるフロート１４より十分に離れた位置としている。また、油水分離運転によって浮上する油が排出されないように、少なくとも、ノズル５よりも低い位置としておく必要がある。本実施形態では処理槽１の底部に近い下方に配置させている。もちろん、処理槽１の底部に設けても差し支えない。   Next, the route (drainage route) of the treated liquid from which the oil component has been separated will be described. A drain port 8 is provided in the lower part of the treatment tank 1. The position of the drainage port 8 is a position sufficiently separated from the supply port 11 to which the liquid to be treated is supplied and the float 14 from which the floating oil is recovered. Moreover, it is necessary to set the position at least lower than the nozzle 5 so that the oil floating by the oil / water separation operation is not discharged. In this embodiment, it arrange | positions below the bottom part of the processing tank 1. FIG. Of course, it may be provided at the bottom of the treatment tank 1.

外部排水口１０の位置は、上述のように処理槽１の液位に関係するため、処理槽１の上端よりは低く、かつ、処理槽１内に十分に被処理液が溜められる程度の高さに設定されている。このため、排水口８と外部排水口１０とを連結する排水管９は上下に延伸する形状となっている。配水管９の大きさ（容積等）は特に問題とはならないが、処理槽１の下部から液面の基準となる外部排出口１０の高さまで延伸しているため、処理槽１に隣り合わせて配置することで、装置全体をコンパクトにすることができる。   Since the position of the external drain 10 is related to the liquid level of the processing tank 1 as described above, it is lower than the upper end of the processing tank 1 and high enough to store the liquid to be processed in the processing tank 1 sufficiently. Is set. For this reason, the drain pipe 9 which connects the drain port 8 and the external drain port 10 has a shape extending vertically. Although the size (volume, etc.) of the water distribution pipe 9 is not particularly problematic, it is arranged adjacent to the treatment tank 1 because it extends from the lower part of the treatment tank 1 to the height of the external discharge port 10 that serves as a liquid level reference. By doing so, the whole apparatus can be made compact.

次に、本実施形態の油水分離装置を適用した例について説明する。図２は、空気圧縮機のドレン浄化処理に適用した場合の実施例を示す図である。なお、図１と共通する構成が多く存在しているが、これについては同一符号を付し、説明は省略する。   Next, an example in which the oil / water separator according to this embodiment is applied will be described. FIG. 2 is a diagram showing an embodiment when applied to a drain purification process of an air compressor. Although there are many configurations common to those in FIG. 1, the same reference numerals are given to them and description thereof is omitted.

圧縮機３０から吐き出された圧縮空気はドライヤー３１で冷却されるため、凝結した水分が発生する。これがすなわちドレンになる。ドレンはドレン排出器３２から圧縮空気の圧力によって外部へ排出され、ドレンが除去された圧縮空気は圧縮機使用者の設備へと供給される。   Since the compressed air discharged from the compressor 30 is cooled by the dryer 31, condensed moisture is generated. This is the drain. The drain is discharged to the outside by the pressure of the compressed air from the drain discharger 32, and the compressed air from which the drain has been removed is supplied to the equipment of the compressor user.

特に給油式の空気圧縮機では、圧縮空気内に混入された油を分離しているが、完全に取り除くことはできないため、ドレン排出器３２から排出されるドレンにも油が混入されている。そこで、ドレン排出器３２からの排出配管を本実施形態の油水分離装置の供給口１１へ接続することで、ドレンの回収が可能となる。   In particular, in the oil supply type air compressor, the oil mixed in the compressed air is separated, but cannot be completely removed. Therefore, the oil discharged from the drain discharger 32 is also mixed. Therefore, the drain can be collected by connecting the discharge pipe from the drain discharger 32 to the supply port 11 of the oil / water separator according to the present embodiment.

ドレン排出器３２は一定量のドレンが貯まってから排出するような間歇運転が一般的であり、排水口８、排水管９の抵抗によって処理槽１内の液位は一時的に上昇する。このとき、上述のように、フロート１４は上下動が可能となっているため、可動式の仕切り部材１３によってフロート１４が液位の変動に追従する。したがって、供給されたドレンが排油管１２へ流出することはない。   The drain discharger 32 is generally operated intermittently so that a certain amount of drain is stored and then discharged, and the liquid level in the treatment tank 1 temporarily rises due to the resistance of the drain port 8 and drain pipe 9. At this time, since the float 14 can move up and down as described above, the float 14 follows the fluctuation of the liquid level by the movable partition member 13. Therefore, the supplied drain does not flow out to the oil drain pipe 12.

処理槽１の容量は供給されるドレンの量によって決定され、一時間あたりの処理量すなわちドレン発生量の１〜２倍が適当である。ポンプ２の能力、空気流量も一時間あたりの処理量を基準に算出することができる。   The capacity of the processing tank 1 is determined by the amount of drain supplied, and is appropriately 1 to 2 times the processing amount per hour, that is, the amount of drain generation. The capacity of the pump 2 and the air flow rate can also be calculated based on the throughput per hour.

ドレン排出器３２からドレンが排出される際、制御盤１７は入力信号１８を受信し、ポンプ２に対して出力信号１９を発し、ポンプ２の運転を制御して油水分離運転を行う。油水分離運転によって処理槽１の液面上に溜まった浮上油１５は、フロート１４、仕切り部材１３、排油管１２を経て自動的に排出されるので、油排出口１６に浮上油回収タンク２０を設置することで回収することができる。   When drain is discharged from the drain discharger 32, the control panel 17 receives the input signal 18, issues an output signal 19 to the pump 2, and controls the operation of the pump 2 to perform the oil-water separation operation. The floating oil 15 collected on the liquid surface of the treatment tank 1 by the oil / water separation operation is automatically discharged through the float 14, the partition member 13, and the oil drain pipe 12, so that the floating oil recovery tank 20 is provided at the oil discharge port 16. It can be collected by installing.

処理槽１内で油水分離された処理水は外部排水口１０から排出されるが、排水口８、配水管９が処理槽１と完全には仕切られていないことから、若干量の油分の流出も考慮して内部に油分吸着材２２を設けた後部フィルタ２１を設置するとよい。 このように、上述の本発明の本実施形態では、微細気泡による浮上分離を行う処理槽１の上部に油と水の比重差を利用して、浮上油のみを回収する浮上油回収機構を設けた。また、処理槽１内に供給される被処理液は処理槽の上部から供給し，油水分離された処理済液は処理槽の下部に設けた処理水出口（排水口８）から処理槽１内の液面の高さまで立ち上げた排水管９を通って排水する構造とした。   The treated water separated in the treatment tank 1 is discharged from the external drain port 10, but since the drain port 8 and the water pipe 9 are not completely separated from the treatment tank 1, a small amount of oil is discharged. Considering the above, it is preferable to install the rear filter 21 provided with the oil adsorbent 22 inside. Thus, in the above-described embodiment of the present invention, a floating oil recovery mechanism that recovers only the floating oil using the difference in specific gravity of oil and water is provided in the upper part of the processing tank 1 that performs floating separation by fine bubbles. It was. Further, the liquid to be treated supplied into the treatment tank 1 is supplied from the upper part of the treatment tank, and the treated liquid separated from the oil and water is supplied into the treatment tank 1 from the treatment water outlet (drain port 8) provided at the lower part of the treatment tank. The water is drained through a drain pipe 9 raised to the level of the liquid.

これらの構成により、浮上分離によって生成された浮上油１５をポンプ等の動力無しに回収でき，構造も単純なために一つの槽で油水分離と浮上油回収が可能になる。また、被処理液の入口（供給口１１）と処理済液の出口（排水口８）を遠ざけ，さらに処理槽１の液面高さまで排水管９を立ち上げることにより，循環ポンプによる浮上分離動作を行いながら互いの液が混合しない状態で処理済液だけを排水することができる。   With these configurations, the floating oil 15 generated by the floating separation can be recovered without power from a pump or the like, and the oil / water separation and the floating oil recovery can be performed in one tank because the structure is simple. In addition, by separating the inlet of the liquid to be processed (supply port 11) and the outlet of the processed liquid (drainage port 8), and further raising the drainage pipe 9 to the liquid level of the treatment tank 1, the floating separation operation by the circulation pump Only the treated liquid can be drained in a state where the liquids are not mixed with each other.

１…処理槽、２…ポンプ、３…空気量調整弁、４…吸気配管、５…ノズル、６…吸引口、７…循環配管（７ａ…配管、７ｂ…配管）、８…排水口、９…排水管、１０…外部排水口、１１…供給口、１２…排油管、１３…仕切り部材、１４…フロート、１５…浮上油、１６…油排出口、１７…制御盤、１８…入力信号、 １９…出力信号、２０…浮上油回収タンク、２１…後部フィルタ、２２…油分吸着材、３０…圧縮機、３１…ドライヤー、３２…ドレン排出器。   DESCRIPTION OF SYMBOLS 1 ... Processing tank, 2 ... Pump, 3 ... Air quantity adjustment valve, 4 ... Intake piping, 5 ... Nozzle, 6 ... Suction port, 7 ... Circulation piping (7a ... Piping, 7b ... Piping), 8 ... Drain port, 9 DESCRIPTION OF SYMBOLS ... Drain pipe, 10 ... External drain port, 11 ... Supply port, 12 ... Oil drain pipe, 13 ... Partition member, 14 ... Float, 15 ... Floating oil, 16 ... Oil discharge port, 17 ... Control panel, 18 ... Input signal, DESCRIPTION OF SYMBOLS 19 ... Output signal, 20 ... Floating oil collection tank, 21 ... Rear filter, 22 ... Oil adsorption material, 30 ... Compressor, 31 ... Dryer, 32 ... Drain discharger.

Claims (9)

被処理液に空気を供給し、ポンプで加圧して被処理液に空気を溶解させ、溶解させた空気を気泡として被処理液とともに処理槽内部に吹き出させることによって、該処理槽において被処理液に含まれる油分を気泡とともに浮上させ該被処理液を水と油分とに分離させる油水分離装置において、
該処理槽の上方から被処理液を供給する供給口と、
該供給口より下部に設けられ、供給口からの被処理液の供給方向に対し、概略水平方向に前記気泡と被処理液を放射状に吹き出すノズルと、
該ノズル位置よりも下部に設けられる排水口と、該排水口より高い位置であって該処理槽上端よりも低い位置に設けられる外部排水口と、該排水口と該外部排水口とを連結する排水管とを備えた油水分離装置。 Supplying air to the liquid to be treated, pressurized by a pump by dissolving air into the liquid to be treated, by blown air was dissolve inside the processing tank along with the liquid to be treated as a bubble, to be processed in said processing tank In an oil-water separator that floats oil contained in the liquid together with air bubbles and separates the liquid to be treated into water and oil,
A supply port for supplying a liquid to be treated from above the treatment tank;
A nozzle that is provided below the supply port, and blows out the bubbles and the liquid to be processed radially in a substantially horizontal direction with respect to the supply direction of the liquid to be processed from the supply port;
Connecting a 該No nozzle position drain outlet provided in the lower portion than the external drain port a position higher than the exhaust water outlet is provided at a position lower than the processing tank upper, the exhaust water outlet and the external drainage port An oil-water separator having a drain pipe to perform. 請求項１に記載の油水分離装置において、該処理槽内に浮上油回収機構を備え、該浮上油回収機構の浮上油回収開口の上端を該外部排水口よりも高く位置させたことを特徴とする油水分離装置。 The oil-water separator according to claim 1, further comprising a floating oil recovery mechanism in the treatment tank, wherein an upper end of a floating oil recovery opening of the floating oil recovery mechanism is positioned higher than the external drainage port. Oil-water separator. 請求項２に記載の油水分離装置において、該浮上油回収開口を上下可動としたことを特徴とする油水分離装置。 3. The oil / water separator according to claim 2 , wherein the floating oil recovery opening is vertically movable. 請求項２又は３に記載の油水分離装置において、該浮上油回収開口から下方に延伸する排油管と、該排油管を流下した油を排出する油排出口とを備え、
該排油管は該処理槽に対して固定され、該排油管と該浮上油回収開口との間が可動体の仕切り部材で連結されることを特徴とする油水分離装置。 The oil-water separator according to claim 2 or 3, comprising an oil drain pipe extending downward from the floating oil recovery opening, and an oil outlet for discharging oil flowing down the oil drain pipe.
The oil / water separator is characterized in that the oil drain pipe is fixed to the treatment tank, and the oil drain pipe and the floating oil recovery opening are connected by a partition member of a movable body. 請求項２乃至４のいずれか一項に記載の油水分離装置において、該浮上油回収開口は該処理槽の液面に、水よりも比重が小さく油より比重の大きいフロートを有し，該浮上油回収機構の浮上油回収開口として用いることを特徴とする油水分離装置。 In the oil-water separator according to any one of claims 2 to 4, the該浮upper oil collecting apertures liquid level of the processing tank, it has a larger float specific gravity than the specific gravity is less oil than water, on該浮An oil-water separator characterized by being used as a floating oil recovery opening of an oil recovery mechanism. 請求項３に記載の油水分離装置において、
比重が小さく油より比重の大きいフロートと、該浮上油回収機構によって回収された油の流通路となる排油管とを有し、
該処理槽内の被処理液と該排油管とを仕切る仕切り部材を該フロートと連結された油水分離装置。 The oil-water separator according to claim 3 ,
A float having a small specific gravity and a larger specific gravity than oil, and an oil drain pipe serving as a flow passage for the oil recovered by the floating oil recovery mechanism,
An oil-water separator in which a partition member that partitions the liquid to be treated in the treatment tank and the oil drain pipe is connected to the float. 請求項１乃至６のいずれか一項に記載の油水分離装置において、
該排水管は、上端を該処理槽より低くするとともに、該処理槽に隣り合わせて配置されることを特徴とする油水分離装置。 In the oil-water separator according to any one of claims 1 to 6 ,
The drainage pipe has an upper end lower than the treatment tank and is disposed adjacent to the treatment tank. 請求項１乃至７のいずれか一項に記載の油水分離装置において、該排水管は、垂直方向に伸張することを特徴とする油水分離装置。The oil-water separator according to any one of claims 1 to 7, wherein the drain pipe extends in a vertical direction. 請求項１乃至８のいずれか一項に記載の油水分離装置において、該処理槽は、前記ノズルからの吹き出し方向の長さよりも高さが大である形状を有することを特徴とする油水分離装置。The oil / water separator according to any one of claims 1 to 8, wherein the treatment tank has a shape whose height is larger than a length in a blowing direction from the nozzle. .
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