JP2021133302A - Oil recovery system and recovery method of oil - Google Patents
Oil recovery system and recovery method of oil Download PDFInfo
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- JP2021133302A JP2021133302A JP2020031318A JP2020031318A JP2021133302A JP 2021133302 A JP2021133302 A JP 2021133302A JP 2020031318 A JP2020031318 A JP 2020031318A JP 2020031318 A JP2020031318 A JP 2020031318A JP 2021133302 A JP2021133302 A JP 2021133302A
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- 238000011084 recovery Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 204
- 239000003673 groundwater Substances 0.000 claims abstract description 49
- 239000012530 fluid Substances 0.000 claims abstract description 39
- 239000012466 permeate Substances 0.000 claims description 21
- 239000003921 oil Substances 0.000 description 113
- 238000010586 diagram Methods 0.000 description 15
- 239000003566 sealing material Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000011162 core material Substances 0.000 description 6
- 238000005553 drilling Methods 0.000 description 5
- 239000004745 nonwoven fabric Substances 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/204—Keeping clear the surface of open water from oil spills
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- Processing Of Solid Wastes (AREA)
Abstract
Description
本発明は、油回収システムおよび油の回収方法に関するものである。 The present invention relates to an oil recovery system and an oil recovery method.
油類や廃棄物などの貯蔵施設や工場などの敷地では、油や汚染物が地盤へ浸透し、地下水面上を移動して公共水域等へ拡散していくリスクがある。
廃棄物の貯蔵施設では、敷地境界近傍に揚水井戸を設置しておき、貯留槽の漏水を検知した後、揚水井戸から汚染物質を含む地下水を揚水することにより、敷地境界外への汚染物の拡散を防止する方法が提案されている（例えば、特許文献１参照）。
At sites such as storage facilities for oils and wastes and factories, there is a risk that oils and pollutants will permeate the ground, move on the groundwater surface, and spread to public water areas.
In the waste storage facility, a pumping well is installed near the boundary of the site, and after detecting a leak in the storage tank, groundwater containing pollutants is pumped from the pumping well to remove contaminants outside the boundary of the site. A method for preventing diffusion has been proposed (see, for example, Patent Document 1).
しかしながら、従来の方法では、揚水井戸で回収しきれなかった汚染物が、揚水井戸同士の間の地盤から境界外へ流出する可能性がある。 However, contaminants that could not be recovered by the conventional methods may flow out of the boundary from the ground between the pumping wells.
本発明は、前述した問題点に鑑みてなされたものであり、その目的とすることは、油類を含む流体の敷地境界外への流出を防止できる油回収システムおよび油の回収方法を提供することである。 The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an oil recovery system and an oil recovery method capable of preventing a fluid containing oils from flowing out of the site boundary. That is.
前述した目的を達成するための第１の発明は、施設の敷地境界の内側に、地盤の地下水位変動範囲付近において水平方向に延伸するように設置されたドレーン材と、一端が前記ドレーン材に連結され、他端が延伸している吸引ホースと、前記吸引ホースの他端に連結された真空吸引部と、を具備し、前記ドレーン材は、一方の面から他方の面に流体を透過させず、前記他方の面が前記敷地境界側となるように設置されることを特徴とする油回収システムである。 The first invention for achieving the above-mentioned object is a drain material installed so as to extend in the horizontal direction in the vicinity of the ground level fluctuation range of the ground inside the site boundary of the facility, and one end of the drain material. A suction hose that is connected and has an extended other end and a vacuum suction portion that is connected to the other end of the suction hose are provided, and the drain material allows fluid to permeate from one surface to the other surface. The oil recovery system is characterized in that the other surface is installed so as to be on the boundary side of the site.
第１の発明によれば、施設の敷地境界の内側に水平方向に延伸するように設置されたドレーン材が、一方の面から他方の面に流体を透過させないので、ドレーン材付近へ移動してきた油類を含む流体の敷地境界外への流出を防止することができる。また、真空吸引部で吸引することにより、油類を含む流体をドレーン材で吸引して回収することができる。 According to the first invention, the drain material installed so as to extend horizontally inside the site boundary of the facility has moved to the vicinity of the drain material because the fluid does not permeate from one surface to the other surface. It is possible to prevent the outflow of fluid containing oils to the outside of the site boundary. Further, by sucking with the vacuum suction unit, the fluid containing oils can be sucked with the drain material and recovered.
単体の前記ドレーン材が上下に複数段に区分され、各段に前記吸引ホースの一端が連結されてもよい。
また、複数の前記ドレーン材が上下方向に併設され、それぞれの前記ドレーン材に前記吸引ホースの一端が連結されてもよい。
このようなドレーン材を用いれば、地盤の地下水位の変動に伴って油層の位置が上下した場合に、ドレーン材のうち油層のある部分のみを限定して吸引を実施することができるので、余分な空気や水の吸引量が減り、効率的に油類を回収できる。
The single drain material may be vertically divided into a plurality of stages, and one end of the suction hose may be connected to each stage.
Further, a plurality of the drain materials may be provided in the vertical direction, and one end of the suction hose may be connected to each of the drain materials.
If such a drain material is used, when the position of the oil layer moves up and down due to fluctuations in the groundwater level of the ground, suction can be performed by limiting only the part of the drain material having the oil layer. The amount of air and water sucked is reduced, and oils can be recovered efficiently.
前記施設は例えば油貯蔵施設であり、前記ドレーン材が平面視で前記油貯蔵施設を囲むように設置される。
これにより、油貯蔵施設が地震や事故等に見舞われた場合の敷地外への油の流出リスクを、遮水壁で囲む場合よりも少ない費用で低減できる。
The facility is, for example, an oil storage facility, and the drain material is installed so as to surround the oil storage facility in a plan view.
As a result, the risk of oil spilling out of the site when the oil storage facility is hit by an earthquake or accident can be reduced at a lower cost than when it is surrounded by an impermeable wall.
前記他方の面に遮蔽材が設けられることが望ましい。
これにより、遮蔽材が設けられた他方の面からドレーン材に流体が流れ込まないので、ドレーン材の敷地境界側の地盤からの水や空気の吸引を防止できる。
It is desirable that a shielding material is provided on the other surface.
As a result, the fluid does not flow into the drain material from the other surface provided with the shielding material, so that it is possible to prevent the suction of water and air from the ground on the boundary side of the site of the drain material.
第２の発明は、施設の敷地境界の内側に、一方の面から他方の面に流体を透過させないドレーン材を、地盤の地下水位変動範囲付近において水平方向に延伸し、前記他方の面が前記敷地境界側となるように設置する工程ａと、一端が前記ドレーン材に連結された吸引ホースの他端を真空吸引部に連結する工程ｂと、前記真空吸引部を作動させて前記ドレーン材から油を吸引する工程ｃと、を具備することを特徴とする油の回収方法である。 In the second invention, a drain material that does not allow fluid to permeate from one surface to the other is stretched horizontally in the vicinity of the ground level fluctuation range of the ground inside the site boundary of the facility, and the other surface is said. The step a of installing so as to be on the site boundary side, the step b of connecting the other end of the suction hose whose one end is connected to the drain material to the vacuum suction portion, and the step b of operating the vacuum suction portion to start from the drain material. A method for recovering oil, which comprises the step c of sucking oil.
第２の発明によれば、施設の敷地境界の内側にドレーン材を水平方向に延伸するように設置するので、ドレーン材付近へ移動してきた油類を含む流体が敷地境界外に流出するのを防止できる。また、真空吸引部で吸引することにより、油類を含む流体をドレーン材で吸引して回収することができる。 According to the second invention, since the drain material is installed so as to extend horizontally inside the site boundary of the facility, the fluid containing oils that has moved to the vicinity of the drain material flows out of the site boundary. Can be prevented. Further, by sucking with the vacuum suction unit, the fluid containing oils can be sucked with the drain material and recovered.
地下水位変動範囲が地盤の浅い部分に位置する場合には、前記工程ａで、前記地下水位変動範囲より深い位置まで溝を掘削し、前記溝に前記ドレーン材を設置し、前記溝を埋め戻すことが望ましい。
この方法でドレーン材を設置する場合、単体の前記ドレーン材が上下に複数段に区分され、各段に前記吸引ホースの一端が連結されてもよい。
地下水位変動範囲が地盤の浅い部分に位置する場合、溝を掘削することによってドレーン材を容易に設置することができる。また、単体のドレーン材を上下に複数段に区分して吸引ホースを連結すれば、ドレーン材の一部の区画のみから吸引できる。
When the groundwater level fluctuation range is located in a shallow part of the ground, in the step a, a groove is excavated to a position deeper than the groundwater level fluctuation range, the drain material is installed in the groove, and the groove is backfilled. Is desirable.
When the drain material is installed by this method, the single drain material may be divided into a plurality of upper and lower stages, and one end of the suction hose may be connected to each stage.
When the groundwater level fluctuation range is located in a shallow part of the ground, the drain material can be easily installed by excavating a ditch. Further, if a single drain material is divided into a plurality of stages vertically and the suction hoses are connected, suction can be performed from only a part of the drain material.
地下水位変動範囲が地盤の深い部分に位置する場合には、例えば、前記工程ａで、前記敷地境界の内側に鉛直方向の基幹ボーリング孔を削孔し、前記基幹ボーリング孔から前記地下水位変動範囲付近に削孔した複数段の水平方向のボーリング孔内に前記ドレーン材をそれぞれ設置し、各段の前記ドレーン材に前記吸引ホースが連結される。
または、前記工程ａで、前記敷地境界の内側に前記地下水位変動範囲付近に向けて曲がりボーリング孔を削孔し、前記曲がりボーリング孔に連続して前記地下水位変動範囲付近に削孔した複数段の水平方向のボーリング孔に前記ドレーン材をそれぞれ設置し、各段の前記ドレーン材に前記吸引ホースが連結されてもよい。
地下水位変動範囲が地盤の深い部分に位置する場合、基幹ボーリング孔や曲がりボーリング孔から水平方向のボーリング孔を掘削することによって、ドレーン材を地下水位変動範囲付近に容易に設置することができる。また、複数段の水平方向のボーリング孔内にドレーン材をそれぞれ設置して吸引ホースを連結すれば、一部のドレーン材のみから吸引できる。
When the groundwater level fluctuation range is located in a deep part of the ground, for example, in the step a, a vertical trunk boring hole is drilled inside the site boundary, and the groundwater level fluctuation range is formed from the trunk boring hole. The drain material is installed in each of a plurality of stages of horizontal boring holes drilled in the vicinity, and the suction hose is connected to the drain material in each stage.
Alternatively, in the step a, a plurality of stages in which a curved boring hole is drilled inside the site boundary toward the vicinity of the groundwater level fluctuation range, and a hole is drilled in the vicinity of the groundwater level fluctuation range continuously to the curved boring hole. The drain material may be installed in each of the horizontal boreholes, and the suction hose may be connected to the drain material in each stage.
When the groundwater level fluctuation range is located in a deep part of the ground, the drain material can be easily installed near the groundwater level fluctuation range by excavating a horizontal boring hole from a trunk boring hole or a curved boring hole. Further, if drain materials are installed in each of a plurality of stages of horizontal boring holes and a suction hose is connected, suction can be performed from only a part of the drain materials.
ドレーン材を上下に複数段に区分した場合や、複数段の水平方向のボーリング孔にドレーン材を設置した場合には、前記工程ｃで、前記各段のうち、油層の存在する段に設置された前記ドレーン材から油を回収することが望ましい。
これにより、地盤の地下水位の変動に伴って油層の位置が上下した場合に、ドレーン材のうち油層のある部分のみを限定して吸引を実施することができる。
When the drain material is divided into a plurality of upper and lower stages, or when the drain material is installed in the horizontal boring holes of the plurality of stages, it is installed in the stage in which the oil layer exists in the step c. It is desirable to recover the oil from the drain material.
As a result, when the position of the oil layer moves up and down due to fluctuations in the groundwater level of the ground, suction can be performed by limiting only the portion of the drain material having the oil layer.
本発明によれば、油類を含む流体の敷地境界外への流出を防止できる油回収システムおよび油の回収方法を提供できる。 According to the present invention, it is possible to provide an oil recovery system and an oil recovery method capable of preventing a fluid containing oils from flowing out of the site boundary.
以下、図面に基づいて本発明の好適な実施形態について詳細に説明する。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
［第１の実施形態］
図１は本発明の第１の実施形態に係る油回収システム３３を示す図である。図１（ａ）は、油回収システム３３の鉛直方向の断面図、図１（ｂ）は、図１（ａ）に示す線Ａ−Ａによる断面図である。図２は、ドレーン材４を示す図である。図２（ａ）は、図１（ｂ）に示す線Ｂ−Ｂによる断面図、図２（ｂ）は、図１（ｂ）に示すドレーン材４を敷地の中心側から見た図である。
[First Embodiment]
FIG. 1 is a diagram showing an oil recovery system 33 according to the first embodiment of the present invention. FIG. 1A is a cross-sectional view of the oil recovery system 33 in the vertical direction, and FIG. 1B is a cross-sectional view taken along the line AA shown in FIG. 1A. FIG. 2 is a diagram showing the drain material 4. FIG. 2A is a cross-sectional view taken along the line BB shown in FIG. 1B, and FIG. 2B is a view of the drain material 4 shown in FIG. 1B as viewed from the center side of the site. ..
図１に示すように、油回収システム３３は、ドレーン材４、吸引ホース５、真空吸引部６等からなる。 As shown in FIG. 1, the oil recovery system 33 includes a drain material 4, a suction hose 5, a vacuum suction unit 6, and the like.
図１（ａ）に示すように、ドレーン材４は、油貯蔵施設２の敷地境界３の内側の地盤１に、地下水位変動範囲３１の全高に亘って設置される。ドレーン材４は、幅方向が略鉛直方向に沿い、水平方向に延伸するように設置される。図１（ｂ）に示すように、ドレーン材４は油貯蔵施設２の全体の外周を覆うように複数枚を並べて配置され、隣り合うドレーン材４同士は端部を重ね合わせたり接合したりして隙間なく配置される。吸引ホース５は、一端がドレーン材４に連結され、他端が地上に延伸して真空吸引部６に連結される。 As shown in FIG. 1A, the drain material 4 is installed on the ground 1 inside the site boundary 3 of the oil storage facility 2 over the entire height of the groundwater level fluctuation range 31. The drain material 4 is installed so as to extend in the horizontal direction along the substantially vertical direction in the width direction. As shown in FIG. 1 (b), a plurality of drain materials 4 are arranged side by side so as to cover the entire outer circumference of the oil storage facility 2, and adjacent drain materials 4 are superposed or joined at their ends. It is arranged without any gaps. One end of the suction hose 5 is connected to the drain material 4, and the other end extends to the ground and is connected to the vacuum suction portion 6.
図２（ａ）に示すように、ドレーン材４は、板状の芯材８と、芯材８の両面を被覆する不織布部９と、芯材８の片面の不織布部９に重ねて設けられたフィルム状の遮蔽材３２からなる。芯材８は樹脂製であり、ドレーン材４の両面の不織布部９同士を繋ぐ帯状材８ａと、帯状材８ａ同士を繋ぐ帯状材８ｂとからなる。不織布部９、遮蔽材３２は例えばポリエステル製である。遮蔽材３２は例えばドレーン材４の製造時に貼付される。ドレーン材４は、地盤１中に、遮蔽材３２が設けられた面が敷地境界３側となるように設置される。 As shown in FIG. 2A, the drain material 4 is provided so as to be overlapped with the plate-shaped core material 8, the non-woven fabric portion 9 covering both sides of the core material 8, and the non-woven fabric portion 9 on one side of the core material 8. It is made of a film-like shielding material 32. The core material 8 is made of resin, and is composed of a strip-shaped material 8a that connects the non-woven fabric portions 9 on both sides of the drain material 4 and a strip-shaped material 8b that connects the strip-shaped materials 8a to each other. The non-woven fabric portion 9 and the shielding material 32 are made of, for example, polyester. The shielding material 32 is attached, for example, at the time of manufacturing the drain material 4. The drain material 4 is installed in the ground 1 so that the surface provided with the shielding material 32 is on the site boundary 3 side.
ドレーン材４の内部には芯材８と不織布部９とに囲まれた複数の空間１０が形成される。ドレーン材４では、遮蔽材３２が設けられた面から空間１０ｂには流体が流れ込まない。また、図２（ａ）に示す左側の空間１０ａと右側の空間１０ｂとの間に帯状材８ｂが存在するため、左面から空間１０ａに流れ込んだ流体は右面側に透過しない。 A plurality of spaces 10 surrounded by the core material 8 and the non-woven fabric portion 9 are formed inside the drain material 4. In the drain material 4, the fluid does not flow into the space 10b from the surface provided with the shielding material 32. Further, since the band-shaped member 8b exists between the space 10a on the left side and the space 10b on the right side shown in FIG. 2A, the fluid flowing into the space 10a from the left surface does not permeate to the right surface side.
ドレーン材４は流体の流路である空間１０が水平方向に延伸するように設置され、図２（ｂ）に示すように、ドレーン材４の一方の端部には吸引パイプ１２が接続される。ドレーン材４と吸引パイプ１２との接続部には、隙間からの空気等の流入を防ぐためのシール材７ａが設けられる。ドレーン材４の他方の端部には、空気等の流入を防ぐためのシール材７ｂが設けられる。吸引パイプ１２には吸引ホース５が連結される。 The drain material 4 is installed so that the space 10 which is a flow path of the fluid extends in the horizontal direction, and as shown in FIG. 2B, a suction pipe 12 is connected to one end of the drain material 4. .. A sealing material 7a for preventing the inflow of air or the like from the gap is provided at the connection portion between the drain material 4 and the suction pipe 12. A sealing material 7b for preventing the inflow of air or the like is provided at the other end of the drain material 4. A suction hose 5 is connected to the suction pipe 12.
図３は、ドレーン材４を設置する方法を示す図である。図３（ａ）は地盤１に溝１１を掘削する工程を示す図、図３（ｂ）は溝１１にドレーン材４を設置する工程を示す図である。 FIG. 3 is a diagram showing a method of installing the drain material 4. FIG. 3A is a diagram showing a process of excavating a groove 11 in the ground 1, and FIG. 3B is a diagram showing a process of installing a drain material 4 in the groove 11.
図１に示す油回収システム３３を構築する際には、まず、図３（ａ）に示すように、油貯蔵施設２の敷地境界３の内側の地盤１に筒状の溝１１を地下水位変動範囲３１より深い位置まで掘削する。溝１１は例えばバックホウなどを用いて掘削される。そして、ドレーン材４を地上から溝１１内に吊り降ろして、図３（ｂ）に示すようにドレーン材４およびドレーン材４に連結された吸引ホース５を溝１１内に設置する。次に、溝１１を埋戻す。このとき、ドレーン材４を地上から吊り下げて支持した状態のまま溝１１に土砂を投入すれば、土砂によってドレーン材４が潰れることがない。溝１１を埋め戻したら、吸引ホース５の地上側の端部を地上に設けられた真空吸引部６に連結する。 When constructing the oil recovery system 33 shown in FIG. 1, first, as shown in FIG. 3A, the groundwater level fluctuates by forming a tubular groove 11 in the ground 1 inside the site boundary 3 of the oil storage facility 2. Excavate deeper than range 31. The groove 11 is excavated using, for example, a backhoe. Then, the drain material 4 is suspended from the ground into the groove 11, and the drain material 4 and the suction hose 5 connected to the drain material 4 are installed in the groove 11 as shown in FIG. 3 (b). Next, the groove 11 is backfilled. At this time, if the earth and sand are thrown into the groove 11 while the drain material 4 is suspended from the ground and supported, the drain material 4 will not be crushed by the earth and sand. After the groove 11 is backfilled, the end portion of the suction hose 5 on the ground side is connected to the vacuum suction portion 6 provided on the ground.
なお、真空吸引部６は、地上に常時設置してもよいし、事故発生時に設置してもよい。真空吸引部６を常時設置して定期的に吸引を実施し、揚液の有無や揚液中の油分の含有量を確認すれば、油の漏洩を検知することができる。また、油の漏洩を検知したら連続吸引に切り替えることで、迅速に油を回収できる。 The vacuum suction unit 6 may be installed on the ground at all times, or may be installed when an accident occurs. Oil leakage can be detected by constantly installing the vacuum suction unit 6 and periodically performing suction to check the presence or absence of the pumped liquid and the content of the oil content in the pumped liquid. In addition, when oil leakage is detected, the oil can be recovered quickly by switching to continuous suction.
図１に示すように事故等によって油貯蔵施設２から油３４が漏洩すると、油３４が地盤１に浸透して地下水面に到達して油層３５が形成される。油層３５は地下水とともに流れてドレーン材４付近に到達する。ドレーン材４は上記したように図２（ａ）に示す左面から右面に流体を透過させないので、筒状のドレーン材４の内側に到達した油層３５は、ドレーン材４の外側に透過せず、図１（ｂ）に示すようにドレーン材４に沿ってゆっくり広がる。 As shown in FIG. 1, when the oil 34 leaks from the oil storage facility 2 due to an accident or the like, the oil 34 permeates the ground 1 and reaches the groundwater surface to form an oil layer 35. The oil layer 35 flows together with the groundwater and reaches the vicinity of the drain material 4. Since the drain material 4 does not allow the fluid to permeate from the left surface to the right surface shown in FIG. 2A as described above, the oil layer 35 reaching the inside of the tubular drain material 4 does not permeate to the outside of the drain material 4. As shown in FIG. 1 (b), it slowly spreads along the drain material 4.
油回収システム３３では、真空吸引部６を作動させると、吸引ホース５および吸引パイプ１２を介してドレーン材４中の空気が図１（ｂ）や図２（ｂ）の白矢印に示す方向に引かれる。すると、筒状のドレーン材４の内側の地盤１の油層３５を含む流体がドレーン材４内に流入し、図１（ｂ）の白矢印に示す方向に移動して吸引パイプ１２および吸引ホース５を介して地上に回収される。 In the oil recovery system 33, when the vacuum suction unit 6 is operated, the air in the drain material 4 passes through the suction hose 5 and the suction pipe 12 in the directions indicated by the white arrows in FIGS. 1 (b) and 2 (b). Be drawn. Then, the fluid containing the oil layer 35 of the ground 1 inside the tubular drain material 4 flows into the drain material 4 and moves in the direction indicated by the white arrow in FIG. 1 (b), and the suction pipe 12 and the suction hose 5 It is recovered on the ground via.
なお、ドレーン材４は、上記したように図２（ａ）に示す遮蔽材３２側が敷地境界３側となるように地盤１中に設置されている。そのため、真空吸引部６を作動させた時にドレーン材４の敷地境界３側から空気や水が吸引されることはない。 The drain material 4 is installed in the ground 1 so that the shielding material 32 side shown in FIG. 2A is the site boundary 3 side as described above. Therefore, when the vacuum suction unit 6 is operated, air or water is not sucked from the site boundary 3 side of the drain material 4.
このように、第１の実施形態の油回収システム３３によれば、施設の敷地境界３の内側に水平方向に延伸するように筒状に設置されたドレーン材４が、油層３５を含む流体を外側に透過させないので、油の敷地境界３外への流出を防止することができる。また、真空吸引部６で吸引することにより、油層３５を含む流体をドレーン材４で吸引して回収することができる。 As described above, according to the oil recovery system 33 of the first embodiment, the drain material 4 installed in a tubular shape so as to extend horizontally inside the site boundary 3 of the facility contains the fluid containing the oil layer 35. Since it does not permeate to the outside, it is possible to prevent the oil from flowing out of the site boundary 3. Further, by sucking with the vacuum suction unit 6, the fluid including the oil layer 35 can be sucked with the drain material 4 and recovered.
第１の実施形態では、ドレーン材４を平面視で油貯蔵施設２を囲むように設置することにより、遮水壁で囲む場合よりも少ない費用で敷地境界３の外側への油３４の流出リスクを低減できる。
また、地盤１に溝１１を掘削することにより、地下水位変動範囲３１が地盤１の比較的浅い部分に位置する場合に、ドレーン材４を容易に設置できる。
In the first embodiment, by installing the drain material 4 so as to surround the oil storage facility 2 in a plan view, there is a risk of oil 34 spilling out of the site boundary 3 at a lower cost than when the drain material 4 is surrounded by an impermeable wall. Can be reduced.
Further, by excavating the groove 11 in the ground 1, the drain material 4 can be easily installed when the groundwater level fluctuation range 31 is located in a relatively shallow portion of the ground 1.
なお、第１の実施形態ではドレーン材４の全幅を用いて吸引を実施したが、ドレーン材４を上下に複数段に区分してもよい。図４は、単体のドレーン材４が上下２段に区分された例を示す図である。 In the first embodiment, the suction is performed using the entire width of the drain material 4, but the drain material 4 may be divided into a plurality of stages vertically. FIG. 4 is a diagram showing an example in which a single drain material 4 is divided into upper and lower two stages.
図４に示すドレーン材４は、上段４ａと下段４ｂとに区分される。上段４ａではドレーン材４の一方の端部に設けられた吸引パイプ１２ａに吸引ホース５ａが連結され、下段４ｂではドレーン材４の他方の端部に設けられた吸引パイプ１２ｂに吸引ホース５ｂが連結される。上段４ａでは、シール材７ａが吸引パイプ１２ａと上段４ａとの接続部からの空気等の流入を防ぎ、シール材７ｂが上段４ａの端部からの空気等の流入を防ぐ。下段４ｂでは、シール材７ａが下段４ｂの端部からの空気等の流入を防ぎ、シール材７ｂが吸引パイプ１２ｂと下段４ｂとの接続部からの空気等の流入を防ぐ。 The drain material 4 shown in FIG. 4 is divided into an upper stage 4a and a lower stage 4b. In the upper 4a, the suction hose 5a is connected to the suction pipe 12a provided at one end of the drain material 4, and in the lower 4b, the suction hose 5b is connected to the suction pipe 12b provided at the other end of the drain material 4. Will be done. In the upper 4a, the sealing material 7a prevents the inflow of air or the like from the connection portion between the suction pipe 12a and the upper 4a, and the sealing material 7b prevents the inflow of air or the like from the end of the upper 4a. In the lower 4b, the sealing material 7a prevents the inflow of air or the like from the end of the lower 4b, and the sealing material 7b prevents the inflow of air or the like from the connection portion between the suction pipe 12b and the lower 4b.
図４に示す例では、地盤１の地下水位の変動に伴って油層３５の位置が上下した場合に、上段４ａと下段４ｂのうち油層３５のある段のみを限定して吸引することができる。そのため、余分な空気や水の吸引量が減り、効率的に油類を回収できる。 In the example shown in FIG. 4, when the position of the oil layer 35 moves up and down due to the fluctuation of the groundwater level of the ground 1, only the upper stage 4a and the lower stage 4b with the oil layer 35 can be sucked. Therefore, the amount of excess air and water sucked is reduced, and oils can be efficiently recovered.
また、第１の実施形態ではドレーン材４を溝１１内に直接設置して埋め戻したが、溝１１に壁を設けてドレーン材４を設置してもよい。図５は、壁１３の間にドレーン材４を設置した例を示す図である。 Further, in the first embodiment, the drain material 4 is directly installed in the groove 11 and backfilled, but the drain material 4 may be installed by providing a wall in the groove 11. FIG. 5 is a diagram showing an example in which the drain material 4 is installed between the walls 13.
図５に示す例では、地盤１に掘削した溝１１内に２枚の壁１３を設置し、壁１３の間にドレーン材４を設置する。筒状のドレーン材４の内側の壁１３ａにはドレーン材４と略同等の高さのスリット１４が設けられ、真空吸引部を作動させると油層３５を含む流体がスリット１４を介してドレーン材４に流入する。図５に示す例では、壁１３の間に土が充填されないので、壁１３の間からドレーン材４を引き上げることによりドレーン材４を容易に交換することができる。また、ドレーン材４の深さ方向の位置調整が容易にできるため、油層の位置に合わせて、ドレーン材４の設置深さを調整することで、効率的に油を吸引することができる。 In the example shown in FIG. 5, two walls 13 are installed in the groove 11 excavated in the ground 1, and the drain material 4 is installed between the walls 13. A slit 14 having a height substantially equal to that of the drain material 4 is provided on the inner wall 13a of the tubular drain material 4, and when the vacuum suction portion is operated, the fluid including the oil layer 35 flows through the slit 14 through the drain material 4. Inflow to. In the example shown in FIG. 5, since the soil is not filled between the walls 13, the drain material 4 can be easily replaced by pulling up the drain material 4 from between the walls 13. Further, since the position of the drain material 4 in the depth direction can be easily adjusted, the oil can be efficiently sucked by adjusting the installation depth of the drain material 4 according to the position of the oil layer.
ドレーン材４の構成は、図２（ａ）に示すものに限らない。ドレーン材４は、一方の面から他方の面に流体が透過せず、他方の面から流体が流れ込まないものであればよく、流体が流れ込まない側の面が敷地境界３側となるように設置される。 The structure of the drain material 4 is not limited to that shown in FIG. 2 (a). The drain material 4 may be installed so that the fluid does not permeate from one surface to the other surface and the fluid does not flow from the other surface, and the surface on the side where the fluid does not flow is the site boundary 3 side. Will be done.
以下、本発明の別の例について、第２、第３の実施形態として説明する。各実施形態では、第１の実施形態と異なる点について説明し、同様の点については図等で同じ符号を付すなどして説明を省略する。 Hereinafter, another example of the present invention will be described as a second and third embodiment. In each embodiment, the points different from those in the first embodiment will be described, and the same points will be omitted by adding the same reference numerals in the drawings and the like.
［第２の実施形態］
図６は本発明の第２の実施形態に係る油回収システム３３ａを示す図である。図７は、油回収システム３３ａの構築方法を示す図である。図７（ａ）は地盤１にボーリング孔１７を削孔する工程を示す図であり、図６に示す線Ｃ１−Ｃ１による断面に対応している。図７（ｂ）はボーリング孔１７にドレーン材１６を設置する工程を示す図であり、図６に示す線Ｃ２−Ｃ２による断面に対応している。図８は、ドレーン材１６の延伸方向に直交する断面を示す図である。
[Second Embodiment]
FIG. 6 is a diagram showing an oil recovery system 33a according to a second embodiment of the present invention. FIG. 7 is a diagram showing a method of constructing the oil recovery system 33a. FIG. 7A is a diagram showing a step of drilling a boring hole 17 in the ground 1, and corresponds to a cross section taken along line C1-C1 shown in FIG. FIG. 7B is a diagram showing a process of installing the drain material 16 in the boring hole 17, and corresponds to the cross section taken along the line C2-C2 shown in FIG. FIG. 8 is a view showing a cross section orthogonal to the stretching direction of the drain material 16.
図６、図７に示すように、油回収システム３３ａは、ドレーン材１６、吸引ホース２１、真空吸引部６等からなる。 As shown in FIGS. 6 and 7, the oil recovery system 33a includes a drain material 16, a suction hose 21, a vacuum suction unit 6, and the like.
図６に示す地盤１では地下水が矢印Ｄに示すように図の左から右に向かって流れている。このとき、ドレーン材１６は地盤１の地下水の流れの下流側の敷地境界３の内側に水平方向に延伸するように設置される。図７（ｂ）に示すように、ドレーン材１６は、地盤１の地下水位変動範囲３１付近に複数段に設置される。吸引ホース２１は、一端がドレーン材１６に連結され、他端が地上に延伸して真空吸引部６に連結される。 In the ground 1 shown in FIG. 6, groundwater flows from the left to the right in the figure as shown by the arrow D. At this time, the drain material 16 is installed so as to extend in the horizontal direction inside the site boundary 3 on the downstream side of the flow of groundwater in the ground 1. As shown in FIG. 7B, the drain material 16 is installed in a plurality of stages in the vicinity of the groundwater level fluctuation range 31 of the ground 1. One end of the suction hose 21 is connected to the drain material 16, and the other end extends to the ground and is connected to the vacuum suction portion 6.
ドレーン材１６は、例えば図２（ａ）に示すドレーン材４と同様の構成であり、一方の面から他方の面に流体が透過せず、他方の面から流体が流れ込まない。また、ドレーン材１６の幅方向の断面は、図８（ａ）（ｂ）に示すように直線状や円弧状であり、流体が流れ込まない面が敷地境界３側となるように配置される。 The drain material 16 has the same configuration as the drain material 4 shown in FIG. 2A, for example, and the fluid does not permeate from one surface to the other surface, and the fluid does not flow from the other surface. Further, the cross section of the drain material 16 in the width direction is a straight line or an arc shape as shown in FIGS. 8A and 8B, and is arranged so that the surface through which the fluid does not flow is on the site boundary 3 side.
ドレーン材１６は流体の流路である空間１０（図２（ａ））が水平方向に延伸するように設置され、図７（ｂ）に示すように、ドレーン材１６の一方の端部にはキャップ２０が接続される。ドレーン材１６とキャップ２０との接続部には、隙間からの空気等の流入を防ぐためのシール材１９が設けられる。キャップ２０には吸引ホース２１が連結される。ドレーン材１６の他方の端部には、空気等の流入を防ぐための図示しないシール材が設けられる。 The drain material 16 is installed so that the space 10 (FIG. 2 (a)), which is a flow path of the fluid, extends in the horizontal direction, and as shown in FIG. 7 (b), the drain material 16 is provided at one end of the drain material 16. The cap 20 is connected. A sealing material 19 for preventing the inflow of air or the like from the gap is provided at the connection portion between the drain material 16 and the cap 20. A suction hose 21 is connected to the cap 20. A sealing material (not shown) for preventing the inflow of air or the like is provided at the other end of the drain material 16.
図６に示す油回収システム３３ａを構築する際には、まず、図７（ａ）に示すように、油貯蔵施設２の敷地境界３の内側の地盤１に鉛直方向の基幹ボーリング孔１５を削孔する。基幹ボーリング孔１５は、地下水位変動範囲３１より深い位置まで掘削される。そして、基幹ボーリング孔１５から図示しない掘削機を発進させて地下水位変動範囲３１内に水平方向のボーリング孔１７−１、…、１７−ｎを削孔し、図７（ｂ）に示すように各ボーリング孔１７−１、…、１７−ｎにドレーン材１６−１、…、１６−ｎを設置する。ドレーン材１６に連結された吸引ホース２１は基幹ボーリング孔１５を通って地上に達する。ドレーン材１６を設置したら、吸引ホース２１の地上側の端部を地上に設けられた真空吸引部６に連結する。 When constructing the oil recovery system 33a shown in FIG. 6, first, as shown in FIG. 7A, a vertical trunk boring hole 15 is formed in the ground 1 inside the site boundary 3 of the oil storage facility 2. Make a hole. The trunk boring hole 15 is excavated to a position deeper than the groundwater level fluctuation range 31. Then, an excavator (not shown) is started from the main boring hole 15 to drill horizontal boring holes 17-1, ..., 17-n within the groundwater level fluctuation range 31, and as shown in FIG. 7 (b). Drain materials 16-1, ..., 16-n are installed in the boring holes 17-1, ..., 17-n. The suction hose 21 connected to the drain material 16 reaches the ground through the trunk boring hole 15. After installing the drain material 16, the end portion of the suction hose 21 on the ground side is connected to the vacuum suction portion 6 provided on the ground.
なお、ボーリング孔１７−１、…、１７−ｎは、上下方向になるべく間隔を空けずに削孔される。ドレーン材１６は例えばボーリング孔１７の削孔と同時に設置され、掘削機のケーシングを抜くとボーリング孔１７の孔壁が崩れてドレーン材１６が土砂に埋まる。 The boring holes 17-1, ..., 17-n are drilled in the vertical direction with as little space as possible. For example, the drain material 16 is installed at the same time as the drilling of the boring hole 17, and when the casing of the excavator is pulled out, the hole wall of the boring hole 17 collapses and the drain material 16 is buried in earth and sand.
図６に示すように事故等によって油貯蔵施設２から油３４が漏洩すると、油３４が地盤１に浸透して地下水面に到達し、地下水とともに流れてドレーン材１６の位置に到達する。上記したようにドレーン材１６は一方の面から他方の面に流体を透過させないので、ドレーン材１６に到達した油３４はドレーン材１６の油貯蔵施設２側の面から敷地境界３側の面に透過せず、ドレーン材１６に沿ってゆっくり広がる。 As shown in FIG. 6, when the oil 34 leaks from the oil storage facility 2 due to an accident or the like, the oil 34 permeates the ground 1 and reaches the groundwater surface, flows together with the groundwater, and reaches the position of the drain material 16. As described above, since the drain material 16 does not allow the fluid to permeate from one surface to the other surface, the oil 34 that has reached the drain material 16 is transferred from the surface of the drain material 16 on the oil storage facility 2 side to the surface on the site boundary 3 side. It does not penetrate and spreads slowly along the drain material 16.
油回収システム３３ａでは、真空吸引部６を作動させると、吸引ホース２１およびキャップ２０を介してドレーン材１６中の空気が図７（ｂ）の白矢印に示す方向に引かれる。すると、ドレーン材１６の内側の地盤１の地下水面を浮遊する油３４を含む流体がドレーン材１６内に流入し、キャップ２０および吸引ホース２１を介して地上に回収される。 In the oil recovery system 33a, when the vacuum suction unit 6 is operated, the air in the drain material 16 is drawn through the suction hose 21 and the cap 20 in the direction indicated by the white arrow in FIG. 7B. Then, the fluid containing the oil 34 floating on the groundwater surface of the ground 1 inside the drain material 16 flows into the drain material 16 and is collected on the ground via the cap 20 and the suction hose 21.
油回収システム３３ａでは、地盤１の地下水位の変動に伴って油３４の層の位置が上下した場合に、複数段のドレーン材１６−１、…、１６−ｎのうち油３４の層のある段のドレーン材１６のみを限定して吸引を実施する。 In the oil recovery system 33a, when the position of the layer of the oil 34 moves up and down due to the fluctuation of the groundwater level of the ground 1, there is a layer of the oil 34 among the multiple stages of drain materials 16-1, ..., 16-n. Suction is performed by limiting only the drain material 16 of the stage.
このように、第２の実施形態の油回収システム３３ａにおいても、ドレーン材１６が油３４を含む流体を透過させずに吸引して回収するので、汚染物質の敷地境界３外への流出を防止することができる。また、ドレーン材１６を平面視で地下水の下流側の敷地境界３の内側のみに設置することで、ドレーン材１６の設置範囲を必要最小限に抑えて敷地外への油の流出リスクを大幅に低減できる。 As described above, also in the oil recovery system 33a of the second embodiment, the drain material 16 sucks and recovers the fluid containing the oil 34 without allowing it to permeate, so that the outflow of pollutants to the outside of the site boundary 3 is prevented. can do. In addition, by installing the drain material 16 only inside the site boundary 3 on the downstream side of the groundwater in a plan view, the installation range of the drain material 16 is minimized and the risk of oil spilling out of the site is greatly increased. Can be reduced.
第２の実施形態では、基幹ボーリング孔１５を掘削し、基幹ボーリング孔１５から水平方向のボーリング孔１７を削孔することにより、地盤１の比較的深い部分に位置する地下水位変動範囲３１にドレーン材１６を容易に設置できる。
また、地下水位変動範囲３１に複数段のドレーン材１６を設置することにより、油３４の層の位置が上下した場合に油３４の層のある段のみを限定して吸引することができる。そのため、余分な空気や水の吸引量が減り、効率的に油類を回収できる。
In the second embodiment, the trunk boring hole 15 is excavated, and the boring hole 17 in the horizontal direction is drilled from the trunk boring hole 15 to drain into the groundwater level fluctuation range 31 located in a relatively deep part of the ground 1. The material 16 can be easily installed.
Further, by installing the drain material 16 in a plurality of stages in the groundwater level fluctuation range 31, when the position of the oil 34 layer is moved up and down, only the stage with the oil 34 layer can be sucked. Therefore, the amount of excess air and water sucked is reduced, and oils can be efficiently recovered.
［第３の実施形態］
図９は本発明の第３の実施形態に係る油回収システム３３ｂを示す図である。図１０は、油回収システム３３ｂの構築方法を示す図である。図１０（ａ）は地盤１にボーリング孔２４を削孔する工程を示す図、図１０（ｂ）はボーリング孔２４にドレーン材２２を設置する工程を示す図である。図１０（ａ）（ｂ）はいずれも図９に示す線Ｅ−Ｅによる断面に対応しているが、図９の上半部に示すドレーン材２２の端部付近の図示を省略している。
[Third Embodiment]
FIG. 9 is a diagram showing an oil recovery system 33b according to a third embodiment of the present invention. FIG. 10 is a diagram showing a method of constructing the oil recovery system 33b. FIG. 10A is a diagram showing a step of drilling a boring hole 24 in the ground 1, and FIG. 10B is a diagram showing a step of installing a drain material 22 in the boring hole 24. 10 (a) and 10 (b) all correspond to the cross sections taken along the lines EE shown in FIG. 9, but the illustration near the end of the drain material 22 shown in the upper half of FIG. 9 is omitted. ..
図９、図１０に示すように、油回収システム３３ｂは、ドレーン材２２、吸引ホース２８、真空吸引部６等からなる。 As shown in FIGS. 9 and 10, the oil recovery system 33b includes a drain material 22, a suction hose 28, a vacuum suction unit 6, and the like.
図９に示すように、ドレーン材２２は複数の油貯蔵施設２が存在する敷地の敷地境界３の内側に水平方向に延伸し、平面視で油貯蔵施設２の群の外側を囲むように設置される。図１０（ｂ）に示すように、ドレーン材２２は、地盤１の地下水位変動範囲３１付近に複数段に設置される。吸引ホース２８は、一端がドレーン材２２に連結され、他端が地上に延伸して真空吸引部６に連結される。 As shown in FIG. 9, the drain material 22 extends horizontally inside the site boundary 3 of the site where the plurality of oil storage facilities 2 exist, and is installed so as to surround the outside of the group of the oil storage facilities 2 in a plan view. Will be done. As shown in FIG. 10B, the drain material 22 is installed in a plurality of stages in the vicinity of the groundwater level fluctuation range 31 of the ground 1. One end of the suction hose 28 is connected to the drain material 22, and the other end extends to the ground and is connected to the vacuum suction portion 6.
ドレーン材２２は、例えば図２（ａ）に示すドレーン材４と同様の構成であり、一方の面から他方の面に流体が透過せず、他方の面から流体が流れ込まない。また、ドレーン材２２の幅方向の断面は、図８（ａ）（ｂ）に示すように直線状や円弧状であり、流体が流れ込まない面が敷地境界３側となるように配置される。 The drain material 22 has, for example, the same configuration as the drain material 4 shown in FIG. 2A, and the fluid does not permeate from one surface to the other surface, and the fluid does not flow from the other surface. Further, the cross section of the drain material 22 in the width direction is a straight line or an arc shape as shown in FIGS. 8A and 8B, and is arranged so that the surface through which the fluid does not flow is on the site boundary 3 side.
ドレーン材２２は流体の流路である空間１０（図２（ａ））が水平方向に延伸するように設置され、図１０（ｂ）に示すように、ドレーン材２２の一方の端部にはキャップ２７が接続される。ドレーン材２２とキャップ２７との接続部には、隙間からの空気等の流入を防ぐためのシール材２６が設けられる。キャップ２７には吸引ホース２８が連結される。ドレーン材２２の他方の端部には、空気等の流入を防ぐための図示しないシール材が設けられる。 The drain material 22 is installed so that the space 10 (FIG. 2 (a)), which is a flow path of the fluid, extends in the horizontal direction, and as shown in FIG. 10 (b), the drain material 22 is provided at one end of the drain material 22. The cap 27 is connected. A sealing material 26 for preventing the inflow of air or the like from the gap is provided at the connection portion between the drain material 22 and the cap 27. A suction hose 28 is connected to the cap 27. A sealing material (not shown) for preventing the inflow of air or the like is provided at the other end of the drain material 22.
図９に示す油回収システム３３ｂを構築する際には、図１０（ａ）に示すように、油貯蔵施設２の敷地境界３の内側の地盤１に地表から地下水位変動範囲３１に向けて曲がりボーリング孔２３を削孔する。そして、曲がりボーリング孔２３に連続して地下水位変動範囲３１内に水平方向のボーリング孔２４を削孔し、図１０（ｂ）に示すように各ボーリング孔２４にドレーン材２２を設置する。ドレーン材２２に連結された吸引ホース２８は曲がりボーリング孔２３を通って地上に達する。ドレーン材２２を設置したら、吸引ホース２８の地上側の端部を地上に設けられた真空吸引部６に連結する。 When constructing the oil recovery system 33b shown in FIG. 9, as shown in FIG. 10A, the ground 1 inside the site boundary 3 of the oil storage facility 2 bends from the ground surface toward the groundwater level fluctuation range 31. The boring hole 23 is drilled. Then, a horizontal boring hole 24 is drilled in the groundwater level fluctuation range 31 continuously in the curved boring hole 23, and a drain material 22 is installed in each boring hole 24 as shown in FIG. 10 (b). The suction hose 28 connected to the drain material 22 reaches the ground through the bent boring hole 23. After installing the drain material 22, the end portion of the suction hose 28 on the ground side is connected to the vacuum suction portion 6 provided on the ground.
なお、ボーリング孔２４−１、…、２４−ｎは、上下方向になるべく間隔を空けずに削孔される。ドレーン材２２は例えばボーリング孔２４の削孔と同時に設置され、掘削機のケーシングを抜くと曲がりボーリング孔２３およびボーリング孔２４の孔壁が崩れてドレーン材２２が土砂に埋まる。 The boring holes 24-1, ..., 24-n are drilled in the vertical direction with as little space as possible. For example, the drain material 22 is installed at the same time as the drilling of the boring hole 24, and when the casing of the excavator is pulled out, the curved boring hole 23 and the hole wall of the boring hole 24 collapse and the drain material 22 is buried in earth and sand.
図９に示すように事故等によって油貯蔵施設２から油３４が漏洩すると、油３４が地盤１に浸透して地下水面に到達し、地下水とともに流れてドレーン材２２の位置に到達する。上記したようにドレーン材２２は一方の面から他方の面に流体を透過させないので、ドレーン材２２の油貯蔵施設２側の面に到達した油３４は敷地境界３側の面に透過せず、ドレーン材２２に沿ってゆっくり広がる。 As shown in FIG. 9, when the oil 34 leaks from the oil storage facility 2 due to an accident or the like, the oil 34 permeates the ground 1 and reaches the groundwater surface, flows together with the groundwater, and reaches the position of the drain material 22. As described above, since the drain material 22 does not allow fluid to permeate from one surface to the other surface, the oil 34 that reaches the surface of the drain material 22 on the oil storage facility 2 side does not permeate through the surface on the site boundary 3 side. It spreads slowly along the drain material 22.
油回収システム３３ｂでは、真空吸引部６を作動させると、吸引ホース２８およびキャップ２７を介してドレーン材２２中の空気が図１０（ｂ）の白矢印に示す方向に引かれる。すると、ドレーン材２２の内側の地下水面を浮遊する油３４を含む流体がドレーン材２２内に流入し、キャップ２７および吸引ホース２８を介して地上に回収される。 In the oil recovery system 33b, when the vacuum suction unit 6 is operated, the air in the drain material 22 is drawn through the suction hose 28 and the cap 27 in the direction indicated by the white arrow in FIG. 10 (b). Then, the fluid containing the oil 34 floating on the groundwater surface inside the drain material 22 flows into the drain material 22 and is collected on the ground via the cap 27 and the suction hose 28.
油回収システム３３ｂでは、地盤１の地下水位の変動に伴って油３４の層の位置が上下した場合に、複数段のドレーン材２２−１、…、２２−ｎのうち油の層のある段のドレーン材２２のみを限定して吸引を実施する。 In the oil recovery system 33b, when the position of the layer of the oil 34 moves up and down due to the fluctuation of the groundwater level of the ground 1, the stage with the oil layer among the multiple stages of drain materials 22-1, ..., 22-n. Only the drain material 22 of No. 22 is limited to perform suction.
このように、第３の実施形態の油回収システム３３ｂにおいても、ドレーン材２２が油３４を含む流体を透過させずに吸引して回収するので、汚染物質の敷地境界３外への流出を防止することができる。また、ドレーン材２２を複数の油貯蔵施設２を平面視で囲むように敷地境界３の内側に設置することで、遮水壁で囲む場合よりも少ない費用で敷地外への油の流出リスクを大幅に低減できる。 As described above, also in the oil recovery system 33b of the third embodiment, the drain material 22 sucks and recovers the fluid containing the oil 34 without allowing it to permeate, so that the outflow of pollutants to the outside of the site boundary 3 is prevented. can do. In addition, by installing the drain material 22 inside the site boundary 3 so as to surround the plurality of oil storage facilities 2 in a plan view, there is a risk of oil spilling out of the site at a lower cost than when surrounding the drain material 22 with an impermeable wall. It can be significantly reduced.
第３の実施形態では、曲がりボーリング孔２３に連続して水平方向のボーリング孔２４を削孔することにより、地盤１の比較的深い部分に位置する地下水位変動範囲３１にドレーン材２２を容易に設置できる。
また、地下水位変動範囲３１に複数段のドレーン材２２を設置することにより、油層の位置が上下した場合に油層のある段のみを限定して吸引することができる。そのため、余分な空気や水の吸引量が減り、効率的に油類を回収できる。
In the third embodiment, the drain material 22 can be easily provided in the groundwater level fluctuation range 31 located in a relatively deep part of the ground 1 by drilling the horizontal boring holes 24 continuously in the curved boring holes 23. Can be installed.
Further, by installing the drain material 22 in a plurality of stages in the groundwater level fluctuation range 31, when the position of the oil layer moves up and down, only the stage with the oil layer can be sucked. Therefore, the amount of excess air and water sucked is reduced, and oils can be efficiently recovered.
以上、添付図面を参照しながら、本発明に係る好適な実施形態について説明したが、本発明はかかる例に限定されない。当業者であれば、本願で開示した技術的思想の範疇内において、各種の変更例又は修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。 Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the technical idea disclosed in the present application, and these also naturally belong to the technical scope of the present invention. Understood.
１………地盤
２………油貯蔵施設
３………敷地境界
４、１６、２２………ドレーン材
４ａ………上段
４ｂ………下段
５、５ａ、５ｂ、２１、２８………吸引ホース
６………真空吸引部
７ａ、７ｂ、１９、２６………シール材
８………芯材
８ａ、８ｂ………帯状材
９………不織布部
１０、１０ａ、１０ｂ………空間
１１………溝
１２、１２ａ、１２ｂ………吸引パイプ
１３………壁
１４………スリット
１５………基幹ボーリング孔
１７、２４………ボーリング孔
２０、２７………キャップ
２３………曲がりボーリング孔
３１………地下水位変動範囲
３３、３３ａ、３３ｂ………油回収システム
３４………油
３５………油層
1 ………… Ground 2 ………… Oil storage facility 3 ………… Site boundary 4, 16, 22 ………… Drain material 4a ………… Upper 4b ………… Lower 5, 5a, 5b, 21, 28 ………… Suction hose 6 ………… Vacuum suction part 7a, 7b, 19, 26 ………… Sealing material 8 ………… Core material 8a, 8b ………… Strip material 9 ………… Non-woven part 10, 10a, 10b ………… Space 11 ………… Grooves 12, 12a, 12b ………… Suction pipe 13 ………… Wall 14 ………… Slit 15 ………… Main boring holes 17, 24 ………… Boring holes 20, 27 ………… Cap 23 …… … Bent boring hole 31 ……… Groundwater level fluctuation range 33, 33a, 33b ……… Oil recovery system 34 ……… Oil 35 ……… Oil layer
Claims (11)
一端が前記ドレーン材に連結され、他端が延伸している吸引ホースと、
前記吸引ホースの他端に連結された真空吸引部と、
を具備し、
前記ドレーン材は、一方の面から他方の面に流体を透過させず、前記他方の面が前記敷地境界側となるように設置されることを特徴とする油回収システム。 Inside the boundary of the facility site, a drain material installed so as to extend horizontally near the groundwater level fluctuation range of the ground, and
A suction hose with one end connected to the drain material and the other end extended,
A vacuum suction unit connected to the other end of the suction hose,
Equipped with
An oil recovery system characterized in that the drain material is installed so that fluid does not permeate from one surface to the other surface and the other surface is on the site boundary side.
一端が前記ドレーン材に連結された吸引ホースの他端を真空吸引部に連結する工程ｂと、
前記真空吸引部を作動させて前記ドレーン材から油を吸引する工程ｃと、
を具備することを特徴とする油の回収方法。 Inside the site boundary of the facility, a drain material that does not allow fluid to permeate from one surface to the other surface is stretched horizontally in the vicinity of the groundwater level fluctuation range of the ground so that the other surface is on the site boundary side. Step a to install in
Step b of connecting the other end of the suction hose, one end of which is connected to the drain material, to the vacuum suction part,
Step c of operating the vacuum suction unit to suck oil from the drain material,
A method for recovering oil, which comprises.
各段の前記ドレーン材に前記吸引ホースが連結されることを特徴とする請求項６記載の油の回収方法。 In the step a, a vertical trunk boring hole is drilled inside the site boundary, and the drain material is drilled in a plurality of horizontal boreholes drilled from the trunk boring hole to the vicinity of the groundwater level fluctuation range. Install each
The method for recovering oil according to claim 6, wherein the suction hose is connected to the drain material in each stage.
各段の前記ドレーン材に前記吸引ホースが連結されることを特徴とする請求項６記載の油の回収方法。 In the step a, a plurality of horizontal stages in which a curved boring hole is drilled inside the site boundary toward the vicinity of the groundwater level fluctuation range and a hole is drilled in the vicinity of the groundwater level fluctuation range continuously to the curved boring hole. Install the drain material in each of the boreholes in the direction,
The method for recovering oil according to claim 6, wherein the suction hose is connected to the drain material in each stage.
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|---|---|---|---|---|
| JP2002301465A (en) * | 2001-04-09 | 2002-10-15 | Shimizu Corp | Cleaning system for soil and ground water polluted with volatile organic compound |
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| JP2002301465A (en) * | 2001-04-09 | 2002-10-15 | Shimizu Corp | Cleaning system for soil and ground water polluted with volatile organic compound |
| JP2003103247A (en) * | 2001-09-28 | 2003-04-08 | Sumitomo Metal Ind Ltd | Structure for preventing spread of pollutant |
| JP2007038175A (en) * | 2005-08-05 | 2007-02-15 | Ohbayashi Corp | Water-running washing structure for polluted soil, and water-running washing method using the same |
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