JP3938913B2 - Oil / water separation and removal equipment - Google Patents

Oil / water separation and removal equipment Download PDF

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JP3938913B2
JP3938913B2 JP2003275045A JP2003275045A JP3938913B2 JP 3938913 B2 JP3938913 B2 JP 3938913B2 JP 2003275045 A JP2003275045 A JP 2003275045A JP 2003275045 A JP2003275045 A JP 2003275045A JP 3938913 B2 JP3938913 B2 JP 3938913B2
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英春 阿部
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日本クリーンオイル株式会社
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本発明は、例えば工場やガソリンスタンド等における一般的な油水分離槽の後段に設置して最終放流時における油分の流出を防止する目的や、変電所等における雨水雑排水の一時的な貯留と排水を目的等として設置されている集水槽等からの排水の際に、排水中の油分の分離、回収、除去を行い、水質汚濁防止法の排水基準値を満たす基準まで油水中の油分を浄化するため等の主として混入油分の少ない排水における法定の油分の漏洩を防止する策として使用される油水分離除去装置に関する。   The purpose of the present invention is to prevent the outflow of oil at the time of final discharge by installing it at the latter stage of a general oil / water separation tank in a factory or a gas station, for example, and to temporarily store and drain rainwater wastewater at substations, etc. When draining from a water collection tank, etc. installed for the purpose, etc., the oil in the drainage is separated, recovered and removed, and the oil in the oil is purified to the standard that meets the drainage standard value of the Water Pollution Control Law. In particular, the present invention relates to an oil-water separation and removal device used as a measure for preventing leakage of legal oil in wastewater mainly containing little oil.

従来、大なる混入油分の油水中の油を水から分離して回収する方法としては、何らかの薬品その他の分離剤等を使用して油分の捕集回収を行っている。例えば、油分含有排水に凝集剤を添加して凝集処理を行う方法において、油分含有排水に油膨潤性の粉末状有機高分子からなる油吸着剤を添加すると共に、凝集剤を添加して凝集処理を行う方法がある（特許文献１参照）。油分含有水中の油分を酵素分解して得られる脂肪酸の水不溶性塩を、油分含有水に添加して油分を吸着させた後、固液分離する処理方法がある（特許文献２参照）。また、粗リンターを必須成分として含有する油吸着剤を使用して含有廃水を清浄化する処理方法もある（特許文献３参照）。   Conventionally, as a method of separating and recovering oil in water containing a large amount of mixed oil from water, collection and recovery of the oil has been performed using some kind of chemicals or other separating agents. For example, in a method in which a flocculant is added to an oil-containing wastewater, an oil adsorbent composed of an oil-swellable powdered organic polymer is added to the oil-containing wastewater, and a flocculant is added to the flocculant. There is a method of performing (see Patent Document 1). There is a processing method in which a water-insoluble salt of a fatty acid obtained by enzymatic decomposition of an oil in oil-containing water is added to the oil-containing water to adsorb the oil, followed by solid-liquid separation (see Patent Document 2). In addition, there is a processing method for purifying contained wastewater using an oil adsorbent containing crude linter as an essential component (see Patent Document 3).

一方、混入油分の少ない場合の処理としては、ガソリンスタンドのように油を取り扱う事業所における消防等で規制している油分の漏洩防止策として、水と油の比重差によってサイホンを利用して浮上分離させる油水分離槽の設置が一般的である。本出願人自身も、油分の多いものもしくは乳化状態に成ったものの処理に適したものとして油分凝集分離回収装置を提供した。この中で特に混入油分の少ないものの処理として、水と油の比重差利用の浮上分離方式を提案した（特許文献４参照）。これは自然流入およびポンプ等による強制流入させた油分混入の水をサイホン効果による浮上を利用した分離プロセスである。
特開平７−９６２８４号公報 特開平６−６３６４４号公報 特公昭５９−９２３４号公報 特開２００３−１２６８５１号公報 On the other hand, when the amount of mixed oil is low, as a measure to prevent oil leakage that is regulated by firefighting etc. at establishments that handle oil like a gas station, it floats using siphons due to the difference in specific gravity between water and oil. An oil / water separation tank is generally installed. The present applicant himself also provided an oil agglomeration separation and recovery apparatus as suitable for the treatment of those having a large amount of oil or in an emulsified state. Among these, a floating separation method using a difference in specific gravity between water and oil has been proposed as a treatment for a particularly small amount of mixed oil (see Patent Document 4). This is a separation process using floating by the siphon effect of natural inflow and oil mixed water forced to flow in by a pump or the like.
JP-A-7-96284 JP-A-6-63644 Japanese Patent Publication No.59-9234 JP 2003-125851 A

しかしながら、従来における油分離回収方法では、薬品その他の分離剤等を使用する頻度が多く、環境汚染の原因にもつながる虞れがある。特に電力会社等の公共性を持つ企業は特に環境汚染には留意する必要がある。そして、最終放流時の段階での混入油分の少ないものの処理として有効な浮上分離方式による油分凝集分離回収装置（サイホン）にあっては、油分を水の抵抗に繰り返しさらすことで、浮上分離除去させようとするものであるが、浮上油分離槽を幾槽も設けてあるため装置全体が大嵩となり、メンテナンスが容易でないものとなると共に、コスト高となる虞れがある。根本的には、複数回の繰り返しでも必ず浮上し切れない油分の残溜が起こり、確実に安心出来る完全除去は非現実的な処理である。   However, in conventional oil separation and recovery methods, chemicals and other separating agents are frequently used, which may cause environmental pollution. In particular, public companies such as electric power companies need to pay attention to environmental pollution. And in the oil agglomeration separation and recovery device (siphon) by the flotation separation method that is effective as a treatment of the one with a small amount of mixed oil at the stage of final discharge, the oil content is repeatedly exposed to the resistance of the water, and the flotation separation is removed. However, since many floating oil separation tanks are provided, the entire apparatus becomes bulky, which makes maintenance difficult and may increase costs. Fundamentally, there is a residue of oil that cannot be lifted up even after multiple iterations, and complete removal that is reliable and reliable is an unrealistic process.

そこで本発明は叙上のような従来存した諸事情に鑑み創出されたもので、装置全体をコンパクト化でき、しかもメンテナンスの簡素化が図れ、またコスト安ともなる完全な油分除去を保証し得る最終放流段階での油水分離除去装置を提供することを目的とする。   Therefore, the present invention was created in view of the conventional circumstances as described above, and the entire apparatus can be made compact, maintenance can be simplified, and complete oil removal can be ensured at a low cost. An object of the present invention is to provide a device for separating and removing oil and water at the final discharge stage.

本発明にあっては、前槽８の前段に配した油水中の分散油・乳化油の捕捉工程、微小油滴の凝集工程、比重差を利用した油滴の浮上分離工程それぞれから成る油粗粒化装置４と、次位に配する槽８内の水平方向または垂直方向に対し４５度傾斜した複数の板材を平行スリット状に離隔配置して成る平行板装置５と、最終段に配したサイホンと、当該サイホンからここまでの処理で浮上し切れなかった油分のみを受取る後槽６に、密嵌装着にて上、下に水流分散板６ｂを配した多孔性網状繊維に適度の親油性と親水性を付与したフェルト状の油吸着剤６ａから成る吸収した油分を流出させない油吸着フィルター装置を備えた油水分離除去装置であって、前記油粗粒化装置４は、油分の捕捉・凝集・粗大化を可能とする超極細繊維膜式フィルターによって形成されて成る。
油吸着フィルター装置は、処理水を均等分散する前後の多孔性の水流分散板６ｂと、これに挟まれた多孔性網状繊維に適度の親油性と親水性を付与したフェルト状の油吸着材６ａから成る油分を吸着し、かつ、これを流出させないとしたものである。 In the present invention, the crude oil comprising the steps of capturing the dispersed oil / emulsified oil in the oil water disposed in the preceding stage of the front tank 8, the agglomeration process of fine oil droplets, and the floating separation process of oil droplets utilizing the difference in specific gravity. A granulating device 4, a parallel plate device 5 in which a plurality of plate materials inclined at 45 degrees with respect to the horizontal or vertical direction in the tank 8 arranged in the next order are arranged in parallel slits, and arranged in the final stage. A moderate amount of lipophilicity is applied to a porous mesh fiber in which a water flow dispersion plate 6b is disposed on the bottom of the rear tank 6 which receives only the siphon and the oil which has not been lifted up from the siphon in the process so far. And an oil / water separation / removal device having an oil adsorbing filter device that does not allow the absorbed oil component to flow out of the felt-like oil adsorbent 6a imparted with hydrophilicity, and the oil coarsening device 4 captures and agglomerates the oil component.・ Ultra-fine fiber membrane filter that enables coarsening Thus made is formed.
The oil adsorption filter device includes a porous water dispersion plate 6b before and after the treated water is uniformly dispersed, and a felt-like oil adsorbent 6a that imparts appropriate lipophilicity and hydrophilicity to the porous network fibers sandwiched therebetween. It is assumed that the oil component consisting of is adsorbed and is not allowed to flow out.

本発明は以上のように構成されているために、在来方式の如く、繰り返しの非能率な浮上分離のみで処理するのではなく、最初の段階で微小油滴を凝集粗粒化してしまうものとなるために、以後の浮上方式での分離工程が簡易・高能率化してしまう。さらに、この工程で浮上し切れなかった油分については、ほぼ完璧に吸着処理してしまう。しかして、構成をコンパクト化でき、しかもメンテナンスの簡素化が図れ、またコスト安ともなり、さらに油分離のための環境汚染の問題となる薬品等を使用する必要の無い油水分離除去装置を提供することができる。混入油分の少ないものの処理に最適である。例えば工場やガソリンスタンド等における一般的な油水分離槽の後段に設置して最終放流時における油分の流出を防止する目的や、変電所等における雨水雑排水の一時的な貯留と排水を目的等として設置されている例えば３０平方メートル程度の部屋に相当する大型規模の集水槽等からの排水の際に、本発明の油水分離除去装置を通して排水することで排水中の油分の除去を効率良く行うことができ、水質汚濁防止法の排水基準値である例えば鉱物油５ｐｐｍ、動植物油３０ｐｐｍを簡易にクリアーすることができるものとして意義がある。   Since the present invention is configured as described above, it does not process only by repeated inefficient flotation separation as in the conventional system, but agglomerates and coarsens fine oil droplets in the first stage. Therefore, the subsequent separation process by the floating method is simplified and highly efficient. Further, the oil that has not been lifted up in this step is almost completely adsorbed. Thus, an oil / water separation / removal device that can reduce the size of the structure, simplify maintenance, reduce costs, and does not need to use chemicals that cause environmental pollution for oil separation is provided. be able to. Optimal for processing oils with low oil content. For example, for the purpose of preventing the oil outflow at the time of final discharge by installing it at the latter stage of a general oil / water separation tank in a factory or a gas station, or for the purpose of temporarily storing and draining stormwater wastewater at substations, etc. For example, when draining from a large-scale water tank corresponding to a room of, for example, about 30 square meters, the oil content in the drainage can be efficiently removed by draining through the oil-water separation and removal device of the present invention. It can be easily cleared, for example, 5 ppm of mineral oil and 30 ppm of animal and vegetable oil, which are drainage standard values of the Water Pollution Control Law.

尚、上記の課題を解決するための手段、発明の効果の項夫々において付記した符号は、図面中に記載した構成各部を示す部分との参照を容易にするために付したもので、図面中の符号によって示された構造・形状に本発明が限定されるものではない。   Note that the reference numerals added in the means for solving the above-described problems and the effects of the invention are given for easy reference to the parts showing the components shown in the drawings. The present invention is not limited to the structure / shape indicated by the reference numeral.

以下、本発明を実施する最良の形態を図面を参照して説明すると、図に示す符号１は、、主として混入油分の少ないものの処理として使用される油水分離除去装置（以下に装置本体と略称する）であり、この装置本体１は、図１に示すように、吸水ポンプ２、ゴミ除去用フィルター３、油粗粒化装置４、平行板装置５、前、後槽８、６、油吸着フィルター装置、排水ポンプ７等から構成されている。このうち油粗粒化装置４、平行板装置５それぞれは、あらかじめ水道水等のきれいな水を張り込んでおいたボックス状の槽８内に収容され、平行板装置５を通ってからサイホンを経てオーバーフローしてくる流水を排出口８ａを通って油吸着フィルター装置内部へ導入させるようにしてある。   BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. As shown in FIG. 1, the apparatus main body 1 includes a water absorption pump 2, a dust removal filter 3, an oil coarsening apparatus 4, a parallel plate apparatus 5, front and rear tanks 8, 6, and an oil adsorption filter. It consists of a device, a drainage pump 7 and the like. Of these, each of the oil coarsening device 4 and the parallel plate device 5 is accommodated in a box-shaped tank 8 in which clean water such as tap water is previously filled, and after passing through the parallel plate device 5, passes through a siphon. The overflowing flowing water is introduced into the oil adsorption filter device through the discharge port 8a.

吸水ポンプ２は、例えば排水ピットＰまたは油水分離槽の最終槽内部等に貯留された油水を汲み上げて、ゴミ等の異物の混入を防止するための２０μのフィルター３を介して油粗粒化装置４内に流入させるもので、例えば毎分１００リットルの油水を揚程できるようにしてある。   The water absorption pump 2 pumps up oil water stored in, for example, the drain pit P or the inside of the final tank of the oil / water separation tank, and the oil coarsening device through a 20 μ filter 3 for preventing foreign matter such as dust from entering. 4, for example, 100 liters of oil water per minute can be lifted.

油粗粒化装置４は、油水中の分散油・乳化油の捕捉工程、微小油滴の凝集工程、比重差を利用した油滴の浮上分離工程それぞれから成る。すなわち、フィルター３を通過した油水は次に並列に配した油粗粒化装置４のコアレッサー（油粗粒化材の一般名称）を通過して粗粒化作用によって大きな油滴となって浮上させるものとしてある。この並列に配したコアレッサーには水量が均一に流入するよう下部にそれぞれ不図示のフローコントロールを取り付ける。この際に各々のコアレッサーを通過する水量は一個当たり毎分６リットル位とし、吸水ポンプ２の容量に合わせて数を調整できるようにしてある。例えば毎分１００リットルの吸水ポンプ２であれば１６個から１７個のコアレッサーを並列に配する。このように槽８内における平行板装置５の前段に油粗粒化装置４のコアレッサーを配置したものが本発明の特徴である。   The oil coarsening device 4 includes a capturing step of a dispersed oil / emulsified oil in oil water, an agglomeration step of fine oil droplets, and a floating separation step of oil droplets using a difference in specific gravity. That is, the oil water that has passed through the filter 3 then passes through the coalescer (generic name of the oil coarsening material) of the oil coarsening device 4 arranged in parallel and floats as large oil droplets by the coarsening action. There is something to let you. The coalescers arranged in parallel are each provided with a flow control (not shown) at the bottom so that the amount of water can flow uniformly. At this time, the amount of water passing through each coalescer is about 6 liters per minute so that the number can be adjusted according to the capacity of the water absorption pump 2. For example, if the water absorption pump 2 is 100 liters per minute, 16 to 17 coalescers are arranged in parallel. As described above, the arrangement of the coalescer of the oil coarsening device 4 in the preceding stage of the parallel plate device 5 in the tank 8 is a feature of the present invention.

平行板装置５は、槽８内の水平方向または垂直方向に対し４５度傾斜したステンレス製の複数の板材を平行スリット状に離隔配置して成るもので、この平行板装置５を通過させることで、抵抗を受けさせ、油水中に含まれる油粒子の浮上速度を速めて油と水との分離効率を上げる構成としてある。すなわち、水流は斜めに配したステンレス製の板を通って下方へと流れ、その際の沈降する抵抗によって油分は浮上させられるものと考えられる。さらに、その斜めに配したステンレス製の板を通って上昇してくる油水はこの上昇の際の抵抗によっても油分は浮上させられるものと考えられる。同様にここから再度下方へと流れ、その際の沈降する抵抗によっても油分は浮上させられるものと考えられる。そしてここでも浮上させきれなかった油分のみが次の槽６へと導かれ、この油分は次記する油吸着フィルター装置によって完全に吸着され、ポンプ７より排出される排水中の油分０を達成する。前記の槽８内の油粗粒化装置４部、平行板装置５部、サイホン部の上部夫々は隔壁で区画されていて、夫々の区画での浮上油分は滞溜し、予じめ張った吸着シート等で定期的に除去される。   The parallel plate device 5 is formed by arranging a plurality of stainless steel plate materials inclined at 45 degrees with respect to the horizontal direction or the vertical direction in the tank 8 in a parallel slit shape. In this configuration, resistance is applied and the floating speed of oil particles contained in the oil water is increased to increase the separation efficiency between oil and water. That is, it is considered that the water flow flows downward through a stainless steel plate arranged obliquely, and the oil component is caused to float by the resistance to sink at that time. Further, it is considered that the oil component rising through the stainless steel plate arranged obliquely can be floated by the resistance at the time of the increase. Similarly, it is considered that the oil component is caused to rise by the resistance that flows downward again from here and settles at that time. Then, only the oil component that could not be lifted up here is guided to the next tank 6, and this oil component is completely adsorbed by the oil adsorption filter device described below to achieve oil content 0 in the drainage discharged from the pump 7. . The oil coarsening device 4 parts, the parallel plate device 5 parts, and the upper part of the siphon part in the tank 8 are each partitioned by a partition wall, and the floating oil content in each section is stagnated and pre-tensioned. It is periodically removed with an adsorption sheet.

すなわち、油吸着フィルター装置は、多孔性網状繊維に親油性と親水性を付与して成る乳化油廃水処理用の油吸着材６ａを使用して成り、平行板装置５を通ってからオーバーフローして排出口８ａを通ってくる流水中の浮上し切れなかった油分を油吸着フィルター装置内に導入させ、ここで繊維表面で油の微粒子を粗粒化し、吸着するものである。この油吸着フィルター装置は、水流を均等分散する上、下の多孔性の水流分散板６ｂと、前記油吸着材６ａとから構成されている。尚、水量が均一に流入するよう上部、下部それぞれにフローコントロールとして例えばフロートスイッチを取り付けるか、あるいは排水ポンプ７自体をインバーター方式とするかのいずれかに構成してある。上記の排出口８ａからの流水を確実に油吸着材６ａに通過させるためである。なお、槽６内にも予め水道水等のきれいな水が張られている。   In other words, the oil adsorption filter device uses an oil adsorbent 6a for emulsified oil wastewater treatment obtained by imparting lipophilicity and hydrophilicity to porous network fibers, and overflows after passing through the parallel plate device 5. Oil that has not floated up in the running water passing through the discharge port 8a is introduced into the oil adsorption filter device, where oil fine particles are coarsened and adsorbed on the fiber surface. This oil adsorption filter device is composed of a porous water flow dispersion plate 6b and an oil adsorbing material 6a, which are dispersed evenly in the water flow. For example, a float switch is attached to each of the upper part and the lower part as a flow control so that the water amount flows uniformly, or the drain pump 7 itself is configured as an inverter system. This is because the flowing water from the discharge port 8a is surely passed through the oil adsorbent 6a. It should be noted that clean water such as tap water is filled in the tank 6 in advance.

油吸着フィルター装置の具体的な構成としては、水量を均一に流入させる四角に作った水流分散板６ｂを上部に配置し、さらに脇からの漏れのないように留意するために油吸着材６ａを槽内壁に対し密嵌配置する。またこの油吸着材６ａには、例えばテイジンのユニセル（株）で開発したオルソーブＢＦ−ＯＬ０１等を使用する。具体的には、５０ｃｍ×５０ｃｍ×０．４ｃｍの規格サイズのオルソーブＢＦ−ＯＬ０１を、毎分１００リットルの吸水ポンプ２であればおおよそ５０枚重ねて使用すれば良い。但しこの場合の能力として一時間当たり６０００リットルの油水が流入排出されるものとして、この原水油分濃度の設定により、油粗粒化装置４、および油吸着フィルター装置の油吸着材６ａそれぞれの交換頻度が決定される。このオルソーブＢＦ−ＯＬ０１の油分吸着能力は自重の１〜３倍程度と考えられるが安全率を見込んで自重と同重量の油分吸着能力として考える。   As a specific configuration of the oil adsorption filter device, a water flow dispersion plate 6b made in a square for uniformly flowing water is arranged at the top, and the oil adsorbent 6a is used in order not to leak from the side. Closely fit the inner wall of the tank. The oil adsorbent 6a is, for example, Orthosorb BF-OL01 developed by Unicell Corporation of Teijin. More specifically, approximately 50 sheets of the sorbate BF-OL01 having a standard size of 50 cm × 50 cm × 0.4 cm may be used if the water absorption pump 2 is 100 liters per minute. However, as the capacity in this case, it is assumed that 6000 liters of oil water flows in and out per hour, and depending on the setting of the raw water oil content concentration, the replacement frequency of each of the oil coarsening device 4 and the oil adsorbent 6a of the oil adsorption filter device is changed. Is determined. The oil adsorption capacity of this orthosorb BF-OL01 is considered to be about 1 to 3 times its own weight, but considering the safety factor, the oil adsorption capacity of the same weight as its own weight is considered.

排水ポンプ７は、油吸着フィルター装置の油吸着材６ａを通過させる際に受ける抵抗を考慮して前記吸水ポンプ２よりも若干多目の容量、例えば毎分１２０リットルのものを使用する。また装置本体１は屋外における使用が多いと考えられ、外部設置を基本としており、図示に示されるように防水仕様としてある。   The drainage pump 7 uses a slightly larger capacity than the water absorption pump 2, for example, 120 liters per minute in consideration of the resistance received when the oil adsorbent 6a of the oil adsorption filter device is passed. Further, the apparatus main body 1 is considered to be frequently used outdoors, and is based on external installation, and is waterproof as shown in the figure.

次に以上のように構成された最良の形態についての使用、動作の一例を説明するに、図１に示すように、例えば変電所等における雨水雑排水の一時的な貯留と排水を目的等として設置されている例えば３０平方メートル程度の部屋に相当する大型規模の集水槽である排水ピットＰの底部近傍に吸入パイプを設置し、吸水ポンプ２によって吸引させる。その際にゴミ等の異物の混入を防止する目的で２０μのフィルター３を通過させる。このフィルター３を通過した油水は次に並列に配した油粗粒化装置４のコアレッサーを通過して粗粒化作用によって大きな油滴となって浮上させる。このときフローコントロールによって、並列に配したコアレッサーへ流入する水量が均一となるように調整する。この際に各々のコアレッサーを通過する水量は一個当たり毎分６リットル位とし、ポンプ容量に合わせて数を調整する。   Next, to explain an example of use and operation of the best mode configured as described above, as shown in FIG. 1, for the purpose of temporary storage and drainage of rainwater miscellaneous drainage in a substation, for example, A suction pipe is installed in the vicinity of the bottom of the drainage pit P which is a large-scale water collecting tank corresponding to, for example, a room of about 30 square meters and is sucked by the water suction pump 2. At that time, a 20 μm filter 3 is passed through for the purpose of preventing contamination of foreign matters such as dust. The oil water that has passed through the filter 3 then passes through the coalescer of the oil coarsening device 4 arranged in parallel and floats as large oil droplets by the coarsening action. At this time, the flow control is performed so that the amount of water flowing into the coalescers arranged in parallel is uniform. At this time, the amount of water passing through each coalescer is about 6 liters per minute, and the number is adjusted according to the pump capacity.

しかして、本発明にあっては、油粗粒化装置４で粗粒化された油分は比重差によって浮上しやすいものとなり、槽８上部へと導かれる。水流はさらに斜めに配したステンレス製の平行板装置５を通って下方へと流れ、その際の沈降する抵抗によっても油分は浮上させられる。さらにその斜めに配したステンレス製の平行板装置５を通って上昇してくる油水はこの上昇の際の抵抗によっても油分は浮上させられる。同様にここから再度下方へと流れ、その際の沈降する抵抗によっても油分は浮上させられる。そしてここでも浮上させきれなかった油分のみがサイホンの上部より排出口８ａを通って次の槽６内へと導かれ、この油分は油吸着材６ａによって完全に吸着され、処理水を排水ポンプ７より排出されることで排水中の油分ゼロを達成するものとなっている。このポンプは油吸着材を通過させる際に受ける抵抗を考慮して入口のポンプより若干多目の容量のものを使用する。また本装置は屋外における使用が多いと考えられ、外部設置を基本としており防水仕様とするを良しとする。ここにコンパクトな油水分離装置が実現した。   Therefore, in the present invention, the oil component coarsened by the oil coarsening device 4 is likely to float due to the difference in specific gravity, and is guided to the upper part of the tank 8. The water flow further flows downward through the stainless steel parallel plate device 5 arranged obliquely, and the oil component is also levitated by the settling resistance at that time. Further, the oil and water rising through the stainless steel parallel plate device 5 arranged obliquely can be floated by the resistance of the rising. Similarly, it flows downward again from here, and the oil component is also levitated by the settling resistance. Only the oil that could not be lifted up here is guided from the upper part of the siphon into the next tank 6 through the discharge port 8a, and this oil is completely adsorbed by the oil adsorbent 6a, and the treated water is discharged into the drain pump 7 By discharging more, zero oil content in the wastewater is achieved. This pump uses a pump having a slightly larger capacity than the inlet pump in consideration of resistance received when the oil adsorbent is passed. In addition, it is considered that this device is often used outdoors, and is based on external installation and should be waterproof. A compact oil-water separator was realized here.

混入油分の少ない排水中の油分の分離、回収、除去を行い、水質汚濁防止法の排水基準値を満たす基準まで油水中の油分を浄化することを義務付けられている小工場やガソリンスタンド等において、この装置をコンパクトで、メンテナンスが容易で、コスト安に提供することが出来る。   In small factories and gas stations where it is obliged to separate, recover, and remove oil in wastewater that contains less oil, and to purify oil in oil water to a level that meets the wastewater standards of the Water Pollution Control Law, This device is compact, easy to maintain, and can be provided at low cost.

本発明を実施するための最良の形態における使用状態の断面図である。It is sectional drawing of the use condition in the best form for implementing this invention. 同じく槽と、油吸着フィルター装置との配置状態を示す平面図である。It is a top view which similarly shows the arrangement | positioning state of a tank and an oil adsorption filter apparatus.

符号の説明Explanation of symbols

Ｐ…排水ピット
１…装置本体
２…吸水ポンプ
３…フィルター
４…油粗粒化装置
５…平行板装置
６…槽
６ａ…油吸着材
６ｂ…水流分散板
７…排水ポンプ
８…槽 P ... Drainage pit 1 ... Main unit
2 ... Water absorption pump 3 ... Filter
4 ... Oil coarsening device 5 ... Parallel plate device
6 ... Tank 6a ... Oil adsorbent
6b ... Water flow dispersion plate 7 ... Drain pump 8 ... Tank

Claims (1)

前槽の前段に配した超極細繊維膜式フィルターによる油水中の分散油・乳化油の捕捉工程、微小油滴の凝集工程、比重差を利用した油滴の浮上分離工程それぞれから成る油粗粒化装置と、次段に配した槽内の水平方向または垂直方向に対し４５度傾斜した複数の板材を平行スリット状に離隔配置して成る平行板装置と、最終段に配したサイホンと、当該サイホンからここまでの処理で浮上し切れなかった油分のみを受取る後槽に、密嵌装着にて上、下に水流分散板を配した多孔性網状繊維に適度の親油性と親水性を付与したフェルト状の油吸着材から成る吸収した油分を流出させない油吸着フィルター装置とを備えたことを特徴とする油水分離除去装置。 Coarse oil particles consisting of a capture process of dispersed oil and emulsified oil in oil water, agglomeration process of fine oil droplets, and a floatation separation process of oil droplets using the difference in specific gravity, using an ultra-fine fiber membrane filter placed in the previous stage of the previous tank , A parallel plate device in which a plurality of plate materials inclined at 45 degrees with respect to the horizontal or vertical direction in the tank arranged in the next stage are arranged in parallel slits, a siphon arranged in the final stage, Appropriate oleophilicity and hydrophilicity were imparted to the porous netting fiber with a water flow dispersion plate placed under and tightly fitted in the rear tank that received only the oil that could not be lifted up from the siphon treatment so far An oil / water separation / removal device comprising an oil adsorption filter device made of felt-like oil adsorbent material that does not allow the absorbed oil component to flow out.
JP2003275045A 2003-07-16 2003-07-16 Oil / water separation and removal equipment Expired - Lifetime JP3938913B2 (en)

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