JP3846870B2

JP3846870B2 - Contaminated groundwater recovery method and its equipment

Info

Publication number: JP3846870B2
Application number: JP2002176507A
Authority: JP
Inventors: 孝夫佐久間; 潔薮本
Original assignee: Estech Corp
Current assignee: Estech Corp
Priority date: 2002-06-18
Filing date: 2002-06-18
Publication date: 2006-11-15
Anticipated expiration: 2022-06-18
Also published as: JP2004024924A

Description

【０００１】
【産業上の利用分野】
本発明は工場廃棄物の杜撰な管理、排水設備の破損等によって地中に浸透したトリファロメロン等の揮発性有機化合物で汚染され、地中に滞留する汚染地下水の浄化回復を行うための汚染地下水回収工法とその装置に関するものである。
【０００２】
【発明が解決しようとする課題】
従来、化学物質に汚染された地下水が地盤内に滞留する場合、汚染箇所周辺に遮水壁を築造して内部に井戸を堀って地下水を汲み上げ、浄化後に復水することによって行われてきた。
【０００３】
しかしながら、この方法によると汚染された地下水と健全な地下水が区別なく汲み上げられるため、地下水の洗浄に長期間が必要となり必要以上に多量な地下水の処理を行わなければならなかった。
【０００４】
【課題を解決するための手段】
本発明は上記した課題に対応しようとするものであり、側壁に設けた吐出ノズルから所定間隔を置いた部位に吸入孔を設け、吸入孔を吸引機構を備えた排出経路に連通させた吸引ロッドを、対象地盤の汚染地下水滞留層に挿入し、吐出ノズルから清水を吐出しながら吸引ロッドを回動して清水と汚染地下水とを攪拌混合すると共に汚染地下水を希釈化して吸入孔から吸引し、ロッド内の排出経路を通じて汚染物質の分離、気化を促進する回収槽に排出回収するようにしたものである。
【０００５】
また、吐出ノズルから吐出する清水の代わりに、炭酸水（H₂CO₃）を噴射吐出し、炭酸水によって汚染物質を吸着分離するようにし、回収後の浄化処理を効率化するようにした。
【０００６】
また、排出経路の吸引機構を、排出経路の底部に設けたジェット噴射孔から吸引水排出方向にジェット流を噴射すると共に、その外側に排出経路内を旋回する旋回流を噴射する構成とし、ジェット流にエアーを添加するようにし、吸引回収中の汚染地下水にエアーを混入させ、地下水に溶け込んだ汚染物質の気化作用を助長し、併せて吸引ロッド自体に吸引力と搬送力が備えられるようにした。
【０００７】
また、排出方向へのジェット流による推進のみでなく、旋回流噴射を加えて排出経路内壁面を均沾する強力な旋回推進流を用い、これを排出経路の中間位置にも出力地点を配置出来るようにして全経路無理のない推進力を確保した。
【０００８】
なお、破砕吸引除去する汚染土壌の形態によっては、排出経路の底部中央に設定されるジェット噴射孔には、気体ジェットのみでなく清水等の液体ジェットを使用することにより、高い質量による強力な推進エネルギーを発生できる。
【０００９】
ジェット噴射による排出方向への直線的エネルギーは、旋回流噴射ノズルからの旋回流と合流して旋回流の核を構成する。ジェット噴射を所定長さインナーチューブによって囲障するとジェット流はインナーチューブによって集束された後、拡散するので更に効果を高めることができる。
【００１０】
旋回流は吸引ポンプだけによっては確保できない吸引搬送力を増強して質量のある汚染地下水を押し出す支持力として働き、ジェット噴射がこれと合体して排出方向への推進力を増幅する。ジェット流、旋回流を構成する流体は、それぞれ液体気体等の気相や質量を選択調整することにより、状況に応じた排出効果を構成することができる。
【００１１】
【実施例】
以下図面に従って本発明の実施例を説明する。１は吸引ロッドで操作機構（目的に応じて水平方向への前進、後退など形態が異なる）２によって支持され、下降、上昇、回転若しくは３６０度往復回動等の作動を与えられる。
【００１２】
吸引ロッド１の先端部側壁には核ノズル31、囲周ノズル32によって構成される重合吐出ノズル３が設けられ、吸引ロツド内部には吐出ノズル３や吸入孔５の各開口部に開口する多重経路を有している。
【００１３】
重合吐出ノズル３は、スイベル４を介して各供給経路により供給される清水、エアー、炭酸水等を、各別の経路から開口する核ノズル31或いは囲周ノズル32を通じて地中に吐出する。
【００１４】
５は吸入孔で、重合吐出ノズル３の上部（必要に応じて下部でも勿論良い）に所定の間隔を置いて開口し、排出経路６に形成された吸引機構と吸引ポンプの作動によって汚染地下水を吸入し、地上の汚染土壌処理機構10に揚送する。51は核ノズル31に清水を供給する清水供給管、52は囲周ノズル32、傾斜噴射ノズル81等に圧縮空気を供給するエア供給管、53はジェット供給管である。
【００１５】
吸入孔５が開口する排出経路６の底部には、中央にスライム排出方向にジェット流を噴射するジェット噴射孔７、その外側に排出経路内を旋回する旋回流を噴射する旋回流噴射ノズル８が複数の傾斜噴射ノズル81によって構成されている。
【００１６】
更に、排出経路６の内壁には所定間隔毎にジェット噴射孔もしくは旋回流噴射ノズルによる中継ノズル９が必要に応じて配置される。
【００１７】
ジェット噴射孔７は周囲をインナーチューブ71によって所定長さ囲障され、ジェット流が所定長さ収束されるようになっている。なお、インナーチューブ71は設置を省略しても良い。
【００１８】
以上のような装置システムにより、注入ロッド１は回転等の適宣手段によって対象地盤の汚染地下水滞留層に推進挿入される。
【００１９】
汚染地下水滞留層において、重合吐出ノズル３の核ノズル３１から清水若しくは炭酸水を、囲周ノズル３２からエアーを吐出しながら吸引ロッド１を回動させ、汚染水と清水若しくは炭酸水を攪拌混合すると共にエアー添加を行いながら吸引ポンプを作動させてポンプの吸引力と排出経路６の吸引負圧によってエアー添加した滞留汚染水を吸入孔５から吸入する。
【００２０】
吸入された汚染水は、排出経路６の底部に開口するジェット噴射孔７、その外側に配置された旋回流噴射ノズル８からの噴射によって構成されるスパイラル搬送流に乗り中継ノズル９により加速されて、排出経路６を通じて汚染地下水回収槽10に送入される。
【００２１】
以上のように、炭酸水によって攪拌混合され、エアー添加された汚染地下水は、炭酸水の分離作用によって揮発性有機化合物が分離され、揮発性物質がエアー添加によって気化促進されて無害化処理されながら回収槽10に送入され、回収後、更に、無害化処理施設において処理されて行くものである。
【００２２】
汚染地下水の回収された対象地盤には、吐出ノズル３を通じて清水と浄化材が注入され、環境基準の回復が行われるものである。
【００２３】
本発明は以上のように構成したので、従来、大掛かりな開削工事や土留め壁の構築等が必要であった汚染地下水の除去回収を吸引ロッドの挿入によって簡易、迅速に行なうことを可能とした。
【００２４】
【図面の簡単な説明】
【図１】本発明の実施例を示すもので、汚染地下水滞留層への吸引ロッドの挿入と汚染地下水吸入施工の状況を示す全体説明図
【図２】注入ロッド先端の汚染地下水吸入孔及び吐出ノズル部分の拡大縦断面図
【図３】排出経路を横断面として示したジェット噴射孔及び旋回流噴射ノズルの平面図
【符号の説明】
１吸引ロッド
２操作機構
３重合吐出ノズル
31 核ノズル
32 囲周ノズル
４スイベル
５吸入孔
51 清水供給管
52 エア供給管
53 ジェット供給管
６排出経路
61 吸引ポンプ
７ジェット噴射孔
71 インナーチューブ
８旋回流噴射ノズル
81 傾斜噴射ノズル
９中継ノズル
10 汚染地下水回収槽
Ａ汚染地下水滞留層[0001]
[Industrial application fields]
The present invention is contaminated with volatile organic compounds such as trifalomeron that have penetrated into the ground due to careful management of factory waste, damage to drainage facilities, etc., and pollution for purifying and recovering contaminated groundwater that remains in the ground It relates to groundwater recovery method and its equipment.
[0002]
[Problems to be solved by the invention]
Conventionally, when groundwater contaminated with chemical substances stays in the ground, it has been done by constructing a barrier wall around the contaminated area, digging a well inside, pumping up the groundwater, and condensing it after purification. .
[0003]
However, according to this method, polluted groundwater and healthy groundwater are pumped without distinction, so it was necessary to clean the groundwater for a long time, and it was necessary to treat more groundwater than necessary.
[0004]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention is intended to address the above-described problem, and a suction rod in which a suction hole is provided at a portion spaced from a discharge nozzle provided on a side wall and the suction hole is communicated with a discharge path having a suction mechanism. Is inserted into the contaminated groundwater retention layer of the target ground, the suction rod is rotated while discharging fresh water from the discharge nozzle, the fresh water and contaminated groundwater are stirred and mixed, and the contaminated groundwater is diluted and sucked from the suction hole, It is designed to be discharged and collected in a collection tank that promotes separation and vaporization of pollutants through the discharge path in the rod.
[0005]
Also, instead of fresh water discharged from the discharge nozzle, carbonated water (H ₂ CO ₃ ) was jetted and discharged to adsorb and separate contaminants with carbonated water, so that the purification process after recovery was made more efficient.
[0006]
In addition, the suction mechanism of the discharge path is configured to inject a jet flow in a suction water discharge direction from a jet injection hole provided at the bottom of the discharge path and to inject a swirl flow that swirls in the discharge path to the outside. Air is added to the flow, air is mixed into the contaminated groundwater during suction collection, promoting the vaporization action of the contaminants dissolved in the groundwater, and the suction rod itself is equipped with suction and transport forces did.
[0007]
In addition to propulsion by jet flow in the discharge direction, a powerful swirl propulsion flow that equalizes the inner wall of the discharge path by adding swirl flow injection can be used to place the output point at an intermediate position of the discharge path. In this way, the propulsive power without overwhelming all the routes was secured.
[0008]
Depending on the form of the contaminated soil to be crushed and removed, powerful propulsion with a high mass can be achieved by using not only a gas jet but also a liquid jet such as fresh water for the jet injection hole set at the bottom center of the discharge path. Can generate energy.
[0009]
The linear energy in the discharge direction by jet injection merges with the swirl flow from the swirl flow injection nozzle to form the core of the swirl flow. If the jet injection is obstructed by the inner tube for a predetermined length, the jet flow is focused by the inner tube and then diffused, so that the effect can be further enhanced.
[0010]
The swirling flow increases the suction conveyance force that cannot be ensured only by the suction pump and acts as a supporting force to push out the contaminated groundwater with mass, and jet jets combine with this to amplify the propulsive force in the discharge direction. The fluid constituting the jet flow and the swirl flow can constitute a discharge effect corresponding to the situation by selectively adjusting the gas phase and mass of liquid gas or the like.
[0011]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a suction rod which is supported by an operation mechanism 2 (different in form such as moving forward and backward in the horizontal direction depending on the purpose) 2 and is provided with operations such as lowering, raising, rotating or reciprocating 360 degrees.
[0012]
A superposition discharge nozzle 3 composed of a core nozzle 31 and a peripheral nozzle 32 is provided on the side wall of the tip of the suction rod 1, and multiple paths open to the openings of the discharge nozzle 3 and the suction hole 5 inside the suction rod. have.
[0013]
The superposition discharge nozzle 3 discharges fresh water, air, carbonated water or the like supplied through each supply path via the swivel 4 into the ground through the core nozzle 31 or the surrounding nozzle 32 opened from each other path.
[0014]
Reference numeral 5 denotes a suction hole, which opens at a predetermined interval above the superposition discharge nozzle 3 (of course, the lower part may be lower if necessary). Contaminated groundwater is removed by operating a suction mechanism and a suction pump formed in the discharge path 6. Inhaled and pumped to ground contaminated soil treatment mechanism 10. 51 is a fresh water supply pipe for supplying fresh water to the nuclear nozzle 31, 52 is an air supply pipe for supplying compressed air to the peripheral nozzle 32, the inclined injection nozzle 81, etc., and 53 is a jet supply pipe.
[0015]
At the bottom of the discharge path 6 where the suction hole 5 is opened, there is a jet injection hole 7 for injecting a jet flow in the slime discharge direction at the center, and a swirl flow injection nozzle 8 for injecting a swirl flow swirling in the discharge path on the outside. A plurality of inclined spray nozzles 81 are used.
[0016]
Further, relay nozzles 9 using jet injection holes or swirling flow injection nozzles are arranged on the inner wall of the discharge path 6 at predetermined intervals as needed.
[0017]
The jet injection hole 7 is surrounded by an inner tube 71 for a predetermined length so that the jet flow is converged for a predetermined length. The inner tube 71 may be omitted.
[0018]
By the apparatus system as described above, the injection rod 1 is propelled and inserted into the contaminated groundwater retention layer of the target ground by appropriate means such as rotation.
[0019]
In the contaminated groundwater retention layer, the suction rod 1 is rotated while discharging fresh water or carbonated water from the core nozzle 31 of the polymerization discharge nozzle 3 and air from the surrounding nozzle 32, and the contaminated water and fresh water or carbonated water are stirred and mixed. At the same time, the suction pump is operated while air is added, and the accumulated contaminated water added with air by the suction force of the pump and the suction negative pressure of the discharge path 6 is sucked from the suction hole 5.
[0020]
The sucked contaminated water is accelerated by the relay nozzle 9 in a spiral conveying flow formed by jetting from the jet injection hole 7 opening at the bottom of the discharge path 6 and the swirling flow injection nozzle 8 arranged outside the jet injection hole 7. The contaminated groundwater recovery tank 10 is sent through the discharge path 6.
[0021]
As described above, in contaminated groundwater that is stirred and mixed with carbonated water and added with air, volatile organic compounds are separated by the separation action of carbonated water, while volatile substances are promoted to be vaporized by air addition and detoxified. It is sent to the collection tank 10, and after the collection, it is further processed in the detoxification treatment facility.
[0022]
The target ground from which the contaminated groundwater has been collected is injected with fresh water and a purification material through the discharge nozzle 3 to restore the environmental standards.
[0023]
Since the present invention is configured as described above, it has been possible to easily and quickly remove and collect contaminated groundwater, which conventionally required large-scale excavation work and construction of retaining walls, by inserting a suction rod. .
[0024]
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention, and is an overall explanatory view showing the state of insertion of a suction rod into a contaminated groundwater retention layer and a construction procedure for sucking contaminated groundwater. FIG. Enlarged longitudinal sectional view of the nozzle part [Fig. 3] Plan view of the jet injection hole and swirl flow injection nozzle showing the discharge path as a transverse section [Explanation of symbols]
1 Suction rod 2 Operating mechanism 3 Superposition discharge nozzle
31 Nuclear nozzle
32 Surrounding nozzle 4 Swivel 5 Suction hole
51 Fresh water supply pipe
52 Air supply pipe
53 Jet supply pipe 6 Discharge route
61 Suction pump 7 Jet injection hole
71 Inner tube 8 Swirl nozzle
81 Inclined spray nozzle 9 Relay nozzle
10 Contaminated groundwater recovery tank A Contaminated groundwater retention layer

Claims

A suction hole is provided at a position spaced from the discharge nozzle provided on the side wall at a predetermined interval, and a suction rod in which the suction hole is connected to a discharge path equipped with a suction mechanism is inserted into the contaminated groundwater retention layer of the target ground, and the discharge nozzle Rotating the suction rod while discharging fresh water from the water , stirring and mixing the fresh water and contaminated groundwater , diluting the contaminated groundwater and sucking it from the suction hole, promoting the separation and vaporization of pollutants through the discharge path in the rod Contaminated groundwater collection method characterized by discharging and collecting in a collection tank

The discharge nozzle on the side wall of the suction rod is configured as a superposition discharge nozzle consisting of a core nozzle and a surrounding nozzle, and the suction rod is rotated while discharging fresh water from the core nozzle 31 and air from the surrounding nozzle in the contaminated groundwater retention layer. In addition to stirring and mixing contaminated water and fresh water, the air discharged from the surrounding nozzle is added to the contaminated water, and the suction pump is activated to add the air by the suction force of the pump and the suction negative pressure of the discharge path. The method for recovering contaminated groundwater according to claim 1, wherein the groundwater is sucked from the suction hole.

The method for recovering contaminated groundwater according to claim 1 or 2 , wherein the fresh water discharged from the discharge nozzle is carbonated water that adsorbs contaminants.

The suction mechanism of the discharge path is configured to inject a jet flow in the suction water discharge direction from the jet injection hole provided in the bottom portion of the suction rod of the discharge path, and to rotate the jet flow by the swirl flow injection nozzle provided outside the jet injection hole . The method for recovering contaminated groundwater according to claim 1, claim 2 or claim 3, wherein a swirl flow swirling outside the discharge path is jetted to the outside.

A suction rod provided with a discharge path provided with a jet injection hole for jetting jet flow in the suction direction in the rod, and a suction hole for sucking contaminated groundwater into the discharge path from the contaminated groundwater retention layer of the target ground, and the suction rod Contaminated groundwater recovery device, characterized in that it comprises a drive mechanism that provides propulsion, rotation, etc.

6. A relay nozzle by jet injection holes or a swirl flow injection nozzle is provided on an inner wall at an appropriate intermediate position of the discharge path, and a jet flow or a swirl flow enhancement flow is injected from the relay point toward the discharge direction . Contaminated groundwater recovery equipment