JP2004033862A - Oil separating apparatus - Google Patents

Oil separating apparatus Download PDF

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Publication number
JP2004033862A
JP2004033862A JP2002192583A JP2002192583A JP2004033862A JP 2004033862 A JP2004033862 A JP 2004033862A JP 2002192583 A JP2002192583 A JP 2002192583A JP 2002192583 A JP2002192583 A JP 2002192583A JP 2004033862 A JP2004033862 A JP 2004033862A
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JP
Japan
Prior art keywords
oil
separation tank
waste liquid
opening
separation
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JP2002192583A
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Japanese (ja)
Inventor
Makoto Fukahori
深堀 誠
Seiji Sudo
須藤 征治
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FUKABORI TEKKOSHO KK
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FUKABORI TEKKOSHO KK
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Priority to JP2002192583A priority Critical patent/JP2004033862A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple oil separating apparatus which, even when oil flows out through a drainage channel from a facility such as a filling station, recognizes it quickly and can surely prevent the outflow of the oil to the outside. <P>SOLUTION: Separation tanks 1A, 1B, and 1C are arranged in series through partitions 2A and 2B, and waste liquid supply ports a<SB>1</SB>, b<SB>1</SB>, and c<SB>1</SB>having height differences and waste liquid discharge openings a<SB>2</SB>, b<SB>2</SB>, and c<SB>2</SB>are formed in the separation tanks 1A-1C, respectively. Each separation tank 1A-1C is formed from a stainless steel plate, and a corrosion-proof layer 3 of an epoxy resin is formed on its outer surface. An opening/closing lid 11A-11C is set on the upper end opening part of each separation tank 1A-1C, and an inspection hole 13 is formed in the lid 11A of the separation tank located most upstream. A suspended frame 16 for keeping an oil adsorbent 15 in the liquid surface part of in the separation tank 1A is formed on the back of the lid 11A, and the oil adsorbent 15 kept in the liquid surface part by the frame 16 is made visible from the inspection hole 13. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、河川などへの油の流出を防止するべく、主として工場や給油所などの排水系に介在される油水分離装置に関する。
【0002】
【従来の技術】
一般に、各種油類を取り扱う施設では、油の外部流出による環境汚染を防止するべく、水と油の比重差を利用して廃液中から油分を回収することが行われている。
【0003】
ここに、図4は水と油の分離に供する従来装置の一例を示す。図4において、Rは地中に埋設されるプレキャストコンクリート製の枠体であり、その内側には隔壁Wで仕切られる分離槽Tが形成される。その各分離槽Tの底部には枠体Rの埋設後にコンクリートの打設による床版Fが形成され、上端開口部にはそれぞれ開閉蓋Cが設けられる。特に、枠体Rの一端側の外壁には最上流に位置する分離槽の廃液取込口を成す入口管Pが接続され、その上流端に下水管Dが接続されるようにしてある。一方、隔壁にはエルボ状の連通管Pが取り付けられ、その各上端が上流側から廃液を受け入れるための廃液取込口とされると共に、連通管Pの各下端は廃液を下流側に流出せしめるための廃液排出口とされる。又、最下流に位置する分離槽の外壁にはエルボ状の出口管Pが取り付けられ、その下端が廃液排出口とされると共に、その上端には河川などに通じる下水管Dが接続されるようにしてある。
【0004】
そして、以上のような油水分離装置によれば、各分離槽Tに油分を含んだ廃液を順に送り、油分を各分離槽Tの上部に浮上させながら、その下方より油分が分離した廃液を排出し、各分離槽Tの上部に浮上した油分を杓やポンプで汲み取って回収することができる。
【0005】
【発明が解決しようとする課題】
然し乍ら、上記従来の油水分離装置によれば、各分離槽の上端開口部が開閉蓋にて密閉され、その開閉蓋を開放しないと内部を視認できないので、定期点検を行うのも煩わしく重労働であり、しかも内部点検を短周期で緻密に行うことが難しいことから不測の事態に早急に対処できず、外部に油を流出させてしまう虞れがあった。又、従来装置はコンクリート製であるから、その搬送や設置が極めて難しく、しかも地震などにより外壁や床版に亀裂を生じて地下水を汚染する虞れがあった。
【0006】
本発明は以上のような事情に鑑みて成されたものであり、その目的は給油所などの施設から油が流出した場合でも、これをいち早く確認して外部への油流出を確実に防止することのできる軽便な油水分離装置を提供することにある。
【0007】
【課題を解決するための手段】
本発明は上記目的を達成するため、高低差を有する廃液取込口と廃液排出口とを備えた分離槽の上端開口部に開閉蓋を設けて成る油水分離装置において、前記開閉蓋にその下の分離槽内を視認し得る覗き窓を設け、好ましくは開閉蓋の裏面に油吸着材を分離槽の液面部分に留置するための保持手段を設け、その保持手段で液面部分に留置せしめた油吸着材を覗き窓より視認可能にしたことを特徴とする。
【0008】
又、高低差を有する廃液取込口と廃液排出口とを備えた複数の分離槽を隔壁を介して直列状に連ね、その各分離槽の上端開口部に開閉蓋を設けて成る油水分離装置において、前記分離槽の上端開口部を塞ぐ開閉蓋の少なくとも一つに覗き窓を設けると共に、その開閉蓋の裏面には油吸着材を分離槽内の液面部分に留置するための保持手段を設け、その保持手段で液面部分に留置せしめた油吸着材を前記覗き窓より視認可能にしたことを特徴とする。
【0009】
特に、最上流の分離槽から最下流の分離槽に向かってその内容積が段階的に小さく設定され、しかも分離槽の底面に対する廃液排出口の位置が下流のものほど低く、且つ下流の分離槽ほど液面から廃液排出口までの距離が大きくなるよう設定されることを特徴とする。又、分離槽がステンレス鋼板から成り、その外面に電気絶縁性を有する防食層を形成したことを特徴とする。
【0010】
【発明の実施の形態】
以下、本発明の適用例を図面に基づいて詳細に説明する。図1は係る油水分離装置の平面図であり、図2には図1におけるX−X線断面を示す。これらの図において、1A,1B,1Cは地中に埋設される分離槽であり、その各分離槽1A〜1Cは隔壁2A,2Bを介して直列状に連ねられる。特に、それら分離槽は耐食性に優れるステンレス鋼板を溶接するなどして形成され、その外面には電気絶縁性を有するエポキシ樹脂その他の樹脂による防食層3が全面的に形成される。この防食層3は水密性を保つシール機能を発揮するが、その主たる機能は地中に流れる迷走電流による分離槽1A〜1Cの電食を防止するためのものである。
【0011】
又、図2から明らかなように、最上流と成す分離槽1Aの外壁には廃液取込口aを形成する入口管4が貫通状態で固定され、その上流端に給油所などの施設内から延びる下水管5が接続されるようにしてある。尚、入口管4に油水吸引ポンプなどを接続して使用することもできる。
一方、隔壁2A,2Bにはエルボ状の連通管6,7が貫通状態で固定され、該連通管6,7の各下端が廃液排出口a,bとして分離槽1A,1Bの内部下方に向けて開口されると共に、その各上端は下流側の分離槽1B,1Cの内部上方に突出して廃液取込口b,cを形成する。
【0012】
更に、最下流と成す分離槽1Cの外壁には、エルボ状の出口管8が貫通状態で固定される。その下端は廃液排出口c2として分離槽の内部下方に向けて開口され、その上端は外部に突出して該下流端に河川や排水処理場などに通じる下水管9が接続されるようにしてある。
【0013】
ここで、分離槽1A〜1Cは上流から下流に向かって容積が段階的に小さく設定され、最上流の分離槽1Aはその容積が最大とされる。尚、各分離槽1A〜1Cは深さを一定にしてそれぞれ容積が隔壁2A,2Bの取付位置により変えられる。又、各分離槽1A〜1Cにおける廃液排出口a,b,cの位置は、底面からの距離h,h,hが上流のものほど大きく、下流に向かってその高さが順に低く設定される(h>h>h)。しかも、連通管6,7及び出口管8の長さを下流のものほど大きくして各分離槽内における液面から廃液排出口までの距離h,h,hが下流の分離槽ほど大きくなるよう設定される(h<h<h)。このため、最上流の分離槽1Aを通過した油分も下流の分離槽1B,1Cにより確実に捕らえることができる。
【0014】
因に、最上流の分離槽1Aの廃液排出口aを底面近くに設ければ、それだけ下流側への油分の流出を防止できるが、廃液は油分のみならず土砂などを含み、その多くが最上流の分離槽1Aに堆積するので、廃液排出口aの位置を下げ過ぎると堆積物により廃液排出口aが塞がれて廃液が分離槽1Aの上方から溢れる虞れがある。このため、本例に係る油水分離装置では、廃液排出口aが堆積物で塞がれぬよう其の位置を高くしながら、最上流に位置する分離槽1Aの容積(横断面積)を最も大きく設定して下流側への油分の流出が可及的少なくなるようにしているのである。
【0015】
一方、各分離槽1A〜1Cの上部内周面には角パイプを固着するなどして成る蓋受け10が設けられ、その蓋受け10上に分離槽の上端開口部を塞ぐ開閉自在な開閉蓋11A,11B,11Cが設けられる。12は各開閉蓋に出入り自在に設けたコ字形の把手であり、各開閉蓋11A〜11Cを開放するときにはその把手12を引き出して開閉蓋11A〜11Cを持ち上げることができる。特に、最上流と成す分離槽の開閉蓋11Aには分離槽1A内を目視検査するための覗き窓13が設けられる。この覗き窓13は開閉蓋11Aに穿孔を施すだけでもよいが、好ましくは図2のようにアクリル板や繊維強化プラスチックなどで成る透明乃至は半透明な透光板14を取り付け、覗き窓13から土石などが入り込まぬようこれを密閉する。
【0016】
又、覗き窓13を設けた開閉蓋11Aで覆われる分離槽1A内には、ポリエステルやガラス繊維といった不織布、又は木綿その他の織布などから成る油吸着材15を覗き窓13から視認できる状態に内蔵する。その油吸着材15は、分離槽1A内の液面L上に浮上した油分を吸着して除去するほか、これは油の吸着による変色によって分離槽1A内の油汚染度を知らしめる働きをする。よって、油吸着材15は浮上した油分に浸るよう分離槽1A内に流入した廃液の液面L部分に留置される。
【0017】
特に、本例では油吸着材15を液面部分に留置する保持手段として、覗き窓13を設けた開閉蓋11Aの裏面に、油吸着材15を収納する吊枠16が設けられる。この吊枠16は開閉蓋11Aの裏面に取り付けられる数本の支軸17と、この各支軸17の下端に取り付けられる底板18とから成り、その底板18が分離槽1A内の廃液に浸る位置、つまり連通管6の上端(下流側の廃液取込口b)より稍低い位置で覗き窓13に対向する状態に固定されるようにしてある。そして、油吸着材15はパンチングメタルなどの穴開き板から成る底板18上に載せられ、その一部が図3に示すよう固定金具19で底板18に固定される。尚、固定金具19を使用せずして油吸着材15を底板18上に載せるだけでもよいが、この場合には油吸着材15が吊枠16内から流れ出ぬよう支軸17の下部に金網などを張り巡らすことが望ましい。
【0018】
ここで、以上のように構成される油水分離装置の作用を説明する。先ず、給油所その他の施設などから排出された油分を含んだ汚水(廃液)は、下水管5を通じて外部に送られ、これが入口管4の一端廃液取込口aより最上流の分離槽1A内に流入する。
そして、その液面が連通管6の上端位置(下流の廃液取込口b)まで上昇すると、分離槽1A内の廃液は連通管6を通じて下流の分離槽1Bに流入し、次いで連通管7を通じて最下流の分離槽1Cに順次流入し、最終的には出口管8から下水管9を通じて下水処理場や河川などに送られる。尚、廃液の流量やこれに含まれる油分が多い場合、下流の分離槽1B,1Cまで油分が流入することもあるが、その大部分は水との比重差により廃液排出口aより上部に浮上して分離槽1Aに残存する。
【0019】
これにより、油吸着材15が分離槽1A内の液面部分で油層に浸り、その油分を吸着する。このため、廃液に油分が含まれていた場合でも、その多くを最上流の分離槽1Aで食い止めることができる。しかも、油吸着材15は油分を含んで黒く変色するので、管理者は開閉蓋11Aを開けることなく覗き窓13から油吸着材15の変色具合を時々観察するだけで施設内から油が流出したか否かを確認することができる。そして、覗き窓13を通して分離槽1A内に油分を確認したら、開閉蓋11Aを開け、浮遊している油分をポンプや杓で汲み取って回収し、同時に油吸着材15の交換を行う。
【0020】
このように、係る油水分離装置によれば、開閉蓋11Aを開けての定期検査以外にも、内部検査を労せず極短周期で緻密に行って外部への油流出事故を確実に防止することができる。
【0021】
以上、本発明について詳しく説明したが、係る油水分離装置は3つの分離槽を連結した3連構成とするほか、これを単槽式としたり、これに別の分離槽を連結して4連式乃至はそれ以上の多連式とすることもできる。又、各分離槽の配列として直列連結ほか、円形や方形状の連結形態を採用することもできる。一方、上記例のように、覗き窓を最上流の分離槽の開閉蓋に設けると、油の流出をいち早く確認できるので好ましいが、その覗き窓を最上流以外の開閉蓋に設けたり、全ての開閉蓋に設けるなどしてもよい。更に、油吸着材を液面部分に留置する保持手段としてロープを用い、そのロープで開閉蓋の裏面に油吸着材を係留するようにしてもよい。尚、その種の保持手段を開閉蓋に設けず、油吸着材として廃液に沈下しないものを使用したり、これにフロートを取り付けて液面上に浮遊させるようにするなどしてもよい。
【0022】
【発明の効果】
以上の説明で明らかなように、本発明によれば分離槽の開閉蓋に覗き窓を設けたことから、開閉蓋を開けずに分離槽内の油の有無を確認できる。このため、緻密な管理を労せず行うことができ、これによって分離槽内への油の流出を早期に発見して外部への油流出を確実に防止することができる。
【0023】
又、分離槽内の液面部分に油吸着材が留置されるようにしていることから、油流出の発見が遅れた場合でも、その油を分離槽内で食い止めることができ、しかも油吸着材を覗き窓から視認できることから、その変色度合いにより油の有無を容易に確認できる。
【0024】
更に、上流の分離槽ほど容積を大きくしていることから、上流側の分離槽で多くの油分を捕捉でき、しかも分離槽の底面に対する廃液排出口の位置が下流のものほど低く、且つ下流の分離槽ほど液面から廃液排出口までの距離が大きくなるよう設定されることから、上流側の分離槽では土砂などの堆積物による流路詰まりが発生し難く、下流側の分離槽に油分が流入した場合もこれが外部に流出する虞れを少なくできる。
【0025】
又、分離槽がステンレス鋼板から成り、その外面に電気絶縁性を有する防食層を形成したことから、地中に流れる迷走電流による分離槽の電食を防止できる。
【図面の簡単な説明】
【図1】本発明に係る油水分離装置の平面図
【図2】図1におけるX−X線断面図
【図3】保持手段の一例を示した斜視図
【図4】従来装置の断面図
【符号の説明】
1A,1B,1C 分離槽
,b,c 廃液取込口
,b,c 廃液排出口
3 防食層
11A,11B,11C 開閉蓋
13 覗き窓
15 油吸着材
16 吊枠(油吸着材の保持手段)
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an oil / water separator mainly interposed in a drainage system such as a factory or a gas station to prevent oil from flowing out to a river or the like.
[0002]
[Prior art]
2. Description of the Related Art In general, in a facility that handles various types of oils, in order to prevent environmental pollution due to external outflow of oil, oil is recovered from waste liquid by utilizing a specific gravity difference between water and oil.
[0003]
FIG. 4 shows an example of a conventional apparatus for separating water and oil. In FIG. 4, R is a precast concrete frame buried in the ground, inside which a separation tank T partitioned by a partition wall W is formed. At the bottom of each separation tank T, a floor slab F is formed by casting concrete after embedding the frame R, and an opening / closing lid C is provided at the upper end opening. In particular, at one end of the outer wall of the frame R is connected an inlet pipe P i that forms the waste inlet of the separation tank located at the most upstream, is as sewer D 1 is connected to the upstream end . On the other hand, an elbow-shaped communication pipe Pc is attached to the partition wall, each upper end of which is used as a waste liquid inlet for receiving waste liquid from the upstream side, and each lower end of the communication pipe Pc transfers waste liquid to the downstream side. It is used as a waste liquid discharge port to make it flow out. Further, the outer wall of the separation tank located downstream mounted elbow-shaped outlet pipe P o, together with its lower end is a waste liquid discharge port, sewer pipe D 2 leading into rivers is connected at its upper end It is so.
[0004]
According to the above-described oil-water separator, the waste liquid containing oil is sequentially sent to each separation tank T, and while the oil is floated on the upper part of each separation tank T, the waste liquid from which the oil is separated is discharged from below. Then, the oil floating on the upper part of each separation tank T can be collected by scooping with a ladle or a pump.
[0005]
[Problems to be solved by the invention]
However, according to the conventional oil-water separation device, the upper end opening of each separation tank is sealed by an opening / closing lid, and the inside cannot be visually recognized unless the opening / closing lid is opened. In addition, since it is difficult to carry out the internal inspection in a short period of time and precisely, it is not possible to quickly cope with an unexpected situation, and there is a possibility that oil may flow out to the outside. Further, since the conventional apparatus is made of concrete, it is extremely difficult to transport and install the apparatus, and there is a possibility that the outer wall or the floor slab may be cracked due to an earthquake or the like to contaminate groundwater.
[0006]
The present invention has been made in view of the above circumstances, and its purpose is to promptly confirm the oil spill from a facility such as a gas station and prevent the oil spill to the outside. It is an object of the present invention to provide a simple oil-water separation device capable of performing the above operations.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an oil-water separation device comprising an opening / closing lid provided at an upper end opening of a separation tank having a waste liquid intake port having a height difference and a waste liquid discharging port. A viewing window through which the inside of the separation tank can be viewed, and preferably a holding means for holding the oil adsorbent on the liquid surface of the separation tank is provided on the back surface of the opening / closing lid, and the holding means holds the oil absorbent at the liquid surface. The oil absorbent is made visible from the viewing window.
[0008]
Further, an oil / water separator comprising a plurality of separation tanks having a waste liquid intake port having a height difference and a waste liquid discharge port connected in series via a partition, and an opening / closing lid provided at an upper end opening of each separation tank. In the above, a viewing window is provided on at least one of the open / close lids closing the upper end opening of the separation tank, and holding means for retaining the oil adsorbent on the liquid surface portion in the separation tank is provided on the back surface of the open / close lid. And an oil adsorbent retained at the liquid level by the holding means is made visible from the viewing window.
[0009]
In particular, the inner volume is gradually set smaller from the most upstream separation tank to the most downstream separation tank, and the position of the waste liquid discharge port with respect to the bottom surface of the separation tank is lower as the downstream one, and the downstream separation tank The distance from the liquid surface to the waste liquid discharge port is set to be larger as the liquid level increases. Further, the separation tank is made of a stainless steel plate, and an anticorrosion layer having electrical insulation is formed on an outer surface thereof.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, application examples of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of the oil-water separation device, and FIG. 2 is a cross-sectional view taken along line XX in FIG. In these figures, reference numerals 1A, 1B, and 1C denote separation tanks buried underground, and the separation tanks 1A to 1C are connected in series via partition walls 2A and 2B. In particular, these separation tanks are formed by welding a stainless steel plate having excellent corrosion resistance, and the outer surface thereof is entirely formed with an anticorrosion layer 3 made of an epoxy resin or another resin having electrical insulation. The anticorrosion layer 3 has a sealing function of maintaining watertightness, but its main function is to prevent electrolytic corrosion of the separation tanks 1A to 1C due to stray current flowing underground.
[0011]
Also, as is clear from FIG. 2, the inlet tube 4 to the outer wall of the separation tank 1A formed between the most upstream to form a waste fluid inlet a 1 is fixed in the through state, in facilities such as service stations at its upstream end A sewage pipe 5 extending therefrom is connected. Incidentally, an oil / water suction pump or the like may be connected to the inlet pipe 4 for use.
On the other hand, elbow-shaped communication pipes 6 and 7 are fixed to the partition walls 2A and 2B in a penetrating state, and the lower ends of the communication pipes 6 and 7 are used as waste liquid discharge ports a 2 and b 2 inside the separation tanks 1A and 1B. in toward while being opened, its respective upper end to form a waste fluid inlet b 1, c 1 protrudes downstream side of the separation tank 1B, the interior upper 1C.
[0012]
Further, an elbow-shaped outlet pipe 8 is fixed to the outer wall of the separation tank 1C formed at the most downstream in a penetrating state. The lower end is opened as a waste liquid discharge port c2 toward the lower inside of the separation tank, and the upper end protrudes outside, and the downstream end is connected to a sewage pipe 9 leading to a river or a wastewater treatment plant.
[0013]
Here, the volumes of the separation tanks 1A to 1C are set to gradually decrease from upstream to downstream, and the volume of the most upstream separation tank 1A is maximized. The depth of each of the separation tanks 1A to 1C is kept constant, and the volume of each of the separation tanks 1A to 1C can be changed depending on the mounting position of the partition walls 2A and 2B. The positions of the waste liquid outlets a 2 , b 2 , and c 2 in each of the separation tanks 1A to 1C are larger as the distances h 2 , h 4 , and h 6 from the bottom surface are more upstream, and the height thereof is lower toward the downstream. Are sequentially set lower (h 2 > h 4 > h 6 ). Moreover, the distance h 1, h 3, h 5 of the length of the communicating tube 6, 7 and outlet pipe 8 by increasing toward the downstream one from the liquid surface in each separation tank to the waste liquid discharge port toward the downstream of the separation vessel It is set to be larger (h 1 <h 3 <h 5). Therefore, the oil passing through the uppermost separation tank 1A can be reliably captured by the separation tanks 1B and 1C located downstream.
[0014]
In this connection, by providing the waste liquid discharge port a 2 of the most upstream of the separation tank 1A near the bottom, but much can be prevented outflow of oil to the downstream side, effluent and the like sediment not oil only, many since deposit on the most upstream of the separation tank 1A, there is blocked the waste liquid discharge port a 2 waste liquid is a possibility that overflow from the upper separation tank 1A by the deposit excessively lowered position of the waste liquid discharge port a 2. Therefore, in the oil-water separator according to the present embodiment, while a higher its position as not blocked by the waste liquid discharge port a 2 sediment volume of the separation tank 1A located most upstream (the cross-sectional area) most It is set to be large so that the outflow of oil to the downstream side is minimized.
[0015]
On the other hand, a lid receiver 10 formed by fixing a square pipe or the like is provided on the upper inner peripheral surface of each of the separation tanks 1A to 1C, and an openable and closable lid for closing the upper end opening of the separation tank is provided on the lid receiver 10. 11A, 11B and 11C are provided. Reference numeral 12 denotes a U-shaped handle provided on each of the openable and closable lids so that each of the openable and closable lids 11A to 11C can be opened to lift the openable and closable lids 11A to 11C. In particular, an opening window 13 for visually inspecting the inside of the separation tank 1A is provided on the opening / closing lid 11A of the separation tank formed at the uppermost stream. The viewing window 13 may be formed by merely perforating the opening / closing lid 11A. However, as shown in FIG. 2, a transparent or translucent translucent plate 14 made of an acrylic plate or fiber-reinforced plastic is preferably attached. This is sealed so that debris etc. do not enter.
[0016]
In addition, in the separation tank 1A covered with the opening / closing lid 11A provided with the viewing window 13, an oil absorbent 15 made of a nonwoven fabric such as polyester or glass fiber, or a cotton or other woven fabric is visible from the viewing window 13. Built in. The oil adsorbent 15 adsorbs and removes the oil floating on the liquid level L in the separation tank 1A, and serves to inform the degree of oil contamination in the separation tank 1A by discoloration due to oil adsorption. . Therefore, the oil adsorbent 15 is retained at the liquid level L of the waste liquid flowing into the separation tank 1A so as to be immersed in the floating oil.
[0017]
In particular, in the present embodiment, a suspension frame 16 for storing the oil absorbent 15 is provided on the back surface of the opening / closing lid 11A provided with the viewing window 13 as a holding means for retaining the oil absorbent 15 at the liquid surface portion. The suspension frame 16 is composed of several spindles 17 attached to the back surface of the opening / closing lid 11A and a bottom plate 18 attached to the lower end of each of the spindles 17, and the bottom plate 18 is immersed in the waste liquid in the separation tank 1A. In other words, it is fixed at a position slightly lower than the upper end of the communication pipe 6 (the waste liquid intake port b 1 on the downstream side) so as to face the viewing window 13. The oil adsorbent 15 is placed on a bottom plate 18 made of a perforated plate such as a punched metal, and a part of the oil adsorbent 15 is fixed to the bottom plate 18 by a fixing bracket 19 as shown in FIG. Note that the oil adsorbent 15 may be simply placed on the bottom plate 18 without using the fixing bracket 19, but in this case, a wire mesh is provided below the support shaft 17 so that the oil adsorbent 15 does not flow out of the suspension frame 16. It is desirable to stretch around.
[0018]
Here, the operation of the oil-water separator configured as described above will be described. First, sewage (waste liquid) containing oil discharged from a gas station or other facilities is sent to the outside through a sewage pipe 5, and this is the separation tank 1A which is the most upstream from a waste liquid intake a1 at one end of an inlet pipe 4. Flows into.
Then, when the liquid level rises to the upper end position of the communication pipe 6 (downstream waste liquid intake b 1 ), the waste liquid in the separation tank 1A flows into the downstream separation tank 1B through the communication pipe 6 and then to the communication pipe 7 , And sequentially flows into the lowermost separation tank 1C, and is finally sent from the outlet pipe 8 through the sewage pipe 9 to a sewage treatment plant or a river. Incidentally, if oil contained in the waste liquid flow rate and which is large, downstream of the separation tank 1B, but oil until 1C is sometimes flowing, most of the above the waste liquid discharge port a 2 specific gravity difference between water It floats and remains in the separation tank 1A.
[0019]
As a result, the oil adsorbent 15 is immersed in the oil layer at the liquid level in the separation tank 1A, and adsorbs the oil. Therefore, even if the waste liquid contains oil, most of the oil can be stopped by the uppermost separation tank 1A. In addition, since the oil adsorbent 15 changes color to black containing oil, the manager only occasionally observes the discoloration state of the oil adsorbent 15 from the viewing window 13 without opening the opening / closing lid 11A, and the oil leaks out of the facility. Can be confirmed. Then, when the oil content is confirmed in the separation tank 1A through the viewing window 13, the opening / closing lid 11A is opened, and the floating oil content is collected by a pump or a scoop, and the oil adsorbent 15 is replaced at the same time.
[0020]
As described above, according to the oil-water separation device, in addition to the periodic inspection with the opening / closing lid 11A opened, the internal inspection is performed in a very short cycle and without any effort, and the oil spill accident to the outside is reliably prevented. Can be.
[0021]
As described above, the present invention has been described in detail. In addition to the three-tank configuration in which three separation tanks are connected to each other, the oil-water separation device may be a single-tank type, or may be a four-tank type by connecting another separation tank to this. Alternatively, a multiple type can be used. The arrangement of the separation tanks may be a series connection or a circular or square connection. On the other hand, as in the above example, it is preferable to provide the viewing window on the opening / closing lid of the most upstream separation tank, because the outflow of oil can be quickly confirmed, but it is preferable to provide the viewing window on the opening / closing lid other than the most upstream, It may be provided on the opening / closing lid. Further, a rope may be used as a holding means for retaining the oil absorbent on the liquid surface portion, and the oil absorbent may be moored to the back surface of the opening / closing lid by the rope. It is to be noted that such a holding means may not be provided on the opening / closing lid, and an oil adsorbent which does not sink into the waste liquid may be used, or a float may be attached to the oil adsorbent so as to float on the liquid surface.
[0022]
【The invention's effect】
As is apparent from the above description, according to the present invention, since the viewing window is provided on the opening / closing lid of the separation tank, the presence or absence of oil in the separation tank can be confirmed without opening the opening / closing lid. For this reason, precise management can be performed without effort, and as a result, the outflow of oil into the separation tank can be found at an early stage, and the outflow of oil can be reliably prevented.
[0023]
In addition, since the oil adsorbent is placed on the liquid surface in the separation tank, even if the discovery of oil spill is delayed, the oil can be stopped in the separation tank and the oil adsorbent can be stopped. Can be visually confirmed from the viewing window, so that the presence or absence of oil can be easily confirmed based on the degree of discoloration.
[0024]
Furthermore, since the volume is larger in the upstream separation tank, a large amount of oil can be captured in the upstream separation tank, and the position of the waste liquid discharge port with respect to the bottom of the separation tank is lower as the downstream one, and the downstream one The separation tank is set so that the distance from the liquid surface to the waste liquid discharge port becomes larger in the separation tank.Therefore, it is difficult for the separation tank on the upstream side to clog the flow path due to sediment such as earth and sand, and the oil in the separation tank on the downstream side Even when the gas flows in, the risk of the gas flowing out can be reduced.
[0025]
In addition, since the separation tank is made of a stainless steel plate and an anticorrosion layer having electrical insulation is formed on its outer surface, electrolytic corrosion of the separation tank due to stray current flowing in the ground can be prevented.
[Brief description of the drawings]
FIG. 1 is a plan view of an oil-water separator according to the present invention. FIG. 2 is a cross-sectional view taken along line XX in FIG. 1. FIG. 3 is a perspective view showing an example of a holding unit. Explanation of code]
1A, 1B, 1C separation tank a 1, b 1, c 1 waste inlet a 2, b 2, c 2 waste liquid discharge port 3 anticorrosive layer 11A, 11B, 11C lid 13 observation window 15 oil sorbent 16 Tsuwaku (Means for holding oil adsorbent)

Claims (6)

高低差を有する廃液取込口と廃液排出口とを備えた分離槽の上端開口部に開閉蓋を設けて成る油水分離装置において、前記開閉蓋にその下の分離槽内を視認し得る覗き窓を設けたことを特徴とする油水分離装置。In an oil / water separation device having an opening / closing lid provided at an upper end opening of a separation tank provided with a waste liquid intake port and a waste liquid discharge port having a height difference, a viewing window through which the inside of the separation tank can be visually recognized. An oil-water separation device comprising: 開閉蓋の裏面に、油吸着材を分離槽の液面部分に留置するための保持手段を設け、その保持手段で液面部分に留置せしめた油吸着材を覗き窓より視認可能にしたことを特徴とする請求項1記載の油水分離装置。On the back side of the opening / closing lid, holding means for holding the oil adsorbent on the liquid surface of the separation tank was provided, and the oil adsorbent held on the liquid surface by the holding means was made visible from the viewing window. The oil-water separation device according to claim 1, wherein: 高低差を有する廃液取込口と廃液排出口とを備えた複数の分離槽を隔壁を介して直列状に連ね、その各分離槽の上端開口部に開閉蓋を設けて成る油水分離装置において、前記分離槽の上端開口部を塞ぐ開閉蓋の少なくとも一つに覗き窓を設けると共に、その開閉蓋の裏面には油吸着材を分離槽内の液面部分に留置するための保持手段を設け、その保持手段で液面部分に留置せしめた油吸着材を前記覗き窓より視認可能にしたことを特徴とする油水分離装置。A plurality of separation tanks having a waste liquid intake port and a waste liquid discharge port having a height difference are connected in series via a partition wall, and an oil / water separation device including an opening / closing lid provided at an upper end opening of each separation tank. A viewing window is provided on at least one of the opening / closing lids closing the upper end opening of the separation tank, and a holding means for retaining the oil adsorbent on the liquid surface portion in the separation tank is provided on the back surface of the opening / closing lid, An oil-water separator, wherein the oil adsorbent retained on the liquid surface by the holding means is visible from the viewing window. 最上流の分離槽から最下流の分離槽に向かってその内容積が段階的に小さく設定される請求項3記載の油水分離装置。4. The oil-water separation device according to claim 3, wherein the internal volume is set to gradually decrease from the uppermost separation tank to the lowermost separation tank. 分離槽の底面に対する廃液排出口の位置が下流のものほど低く、且つ下流の分離槽ほど液面から廃液排出口までの距離が大きくなるよう設定される請求項3記載の油水分離装置。4. The oil / water separator according to claim 3, wherein the position of the waste liquid outlet with respect to the bottom surface of the separation tank is set lower in a downstream side, and the distance from the liquid surface to the waste liquid outlet is set larger in a downstream separation tank. 分離槽がステンレス鋼板から成り、その外面に電気絶縁性を有する防食層を形成したことを特徴とする請求項1〜5の何れかに記載の油水分離装置。The oil / water separator according to any one of claims 1 to 5, wherein the separation tank is made of a stainless steel plate, and an anticorrosion layer having electrical insulation is formed on an outer surface thereof.
JP2002192583A 2002-07-01 2002-07-01 Oil separating apparatus Pending JP2004033862A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007090210A (en) * 2005-09-28 2007-04-12 Chugoku Electric Power Co Inc:The Oil separation method of oil-containing waste water and oil separator therefor
JP2010119910A (en) * 2008-11-17 2010-06-03 Chugoku Electric Power Co Inc:The Waste water treatment system
JP2014155896A (en) * 2013-02-15 2014-08-28 Tohoku Electric Power Co Inc Leaked oil recovery device
CN114307255A (en) * 2021-12-08 2022-04-12 中核内蒙古矿业有限公司 Continuous working oil-water separation device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007090210A (en) * 2005-09-28 2007-04-12 Chugoku Electric Power Co Inc:The Oil separation method of oil-containing waste water and oil separator therefor
JP2010119910A (en) * 2008-11-17 2010-06-03 Chugoku Electric Power Co Inc:The Waste water treatment system
JP2014155896A (en) * 2013-02-15 2014-08-28 Tohoku Electric Power Co Inc Leaked oil recovery device
CN114307255A (en) * 2021-12-08 2022-04-12 中核内蒙古矿业有限公司 Continuous working oil-water separation device

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