JP2003334533A - Method and apparatus for soil washing, and water suction-air supply apparatus - Google Patents

Method and apparatus for soil washing, and water suction-air supply apparatus

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Publication number
JP2003334533A
JP2003334533A JP2002140611A JP2002140611A JP2003334533A JP 2003334533 A JP2003334533 A JP 2003334533A JP 2002140611 A JP2002140611 A JP 2002140611A JP 2002140611 A JP2002140611 A JP 2002140611A JP 2003334533 A JP2003334533 A JP 2003334533A
Authority
JP
Japan
Prior art keywords
tank
water
sediment
sand
soil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002140611A
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Japanese (ja)
Inventor
Yosuke Shikata
洋介 志方
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Etl Kk
Original Assignee
Etl Kk
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Filing date
Publication date
Application filed by Etl Kk filed Critical Etl Kk
Priority to JP2002140611A priority Critical patent/JP2003334533A/en
Publication of JP2003334533A publication Critical patent/JP2003334533A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly

Landscapes

  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Filtration Of Liquid (AREA)
  • Processing Of Solid Wastes (AREA)
  • Physical Water Treatments (AREA)
  • Removal Of Floating Material (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soil washing method which minimizes the discharge of contaminated soil and wash water to the outside of a treatment plant, reduces energy consumption required for soil transport, and the like, and further, reutilizes the wash water in the treatment plant to reduce the amount of water used to the minimum necessary one, thereby realizing energy saving. <P>SOLUTION: The soil washing method includes a treatment process in which, before the transfer of earth and sand to earth-and-sand separation tanks 3, 4, 5, the contaminated earth and sand are washed by an ejector 8, a treatment process in which the washed earth and sand are settled in the earth-and-sand separation tanks 3, 4, 5 followed by classification into grain diameter groups, a treatment process in which stored water in the earth-and-sand separation tanks 3, 4, 5 is sucked by a pipe 16 provided with a filter, a treatment process in which fine air bubbles are generated through the pipe 16 to eliminate clogging of the filter, and at the same time, to separate contaminants contained in the stored water, a treatment process in which the stored water is filtered in a sand filtration tank 6, a treatment process in which filtered water from the sand filtration tank 6 is received in a water supply tank 7 and is reutilized as wash water, and a treatment process in which the earth and sand settled in the earth-and-sand separation tanks 3, 4, 5 are discharged. <P>COPYRIGHT: (C)2004,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、エジェクターによ
る土壌洗浄装置及び土壌洗浄方法に関し、特に、深層、
浅層、高濃度汚染、低濃度汚染、複合汚染、或いは汚染
土壌の粒径を問わず、低コストかつ効率的に汚染土壌を
浄化することが可能な土壌洗浄装置及び土壌洗浄方法並
びに取水送気兼用装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil cleaning device and a soil cleaning method using an ejector, and particularly to a deep layer,
Soil cleaning device, soil cleaning method, and intake air supply capable of efficiently cleaning contaminated soil at low cost regardless of shallow layer, high-concentration pollution, low-concentration pollution, complex pollution, or particle size of contaminated soil The combined use device.

【０００２】[0002]

【従来の技術】近年では、地球規模で環境問題が議論さ
れており、環境汚染の一つである土壌汚染についても関
心が高まっている。土壌や地下水を汚染する物質として
は、例えば、揮発性有機化合物（例えば、トリクロロエ
チレン、ベンゼン、テトラクロロエチレン等）、石油系
の炭化水素、六価クロム、油分（ベンゼン）等が知られ
ている。2. Description of the Related Art In recent years, environmental problems have been discussed on a global scale, and there is a growing interest in soil pollution, which is one of the environmental pollutions. Known substances that contaminate soil and groundwater include, for example, volatile organic compounds (eg, trichloroethylene, benzene, tetrachloroethylene, etc.), petroleum hydrocarbons, hexavalent chromium, oil (benzene), and the like.

【０００３】汚染された土壌を浄化する手段として、例
えば、ウェルポイント或いはディープウェルを地盤内の
汚染土壌部分に打設し、地下水を揚水して地下水位を低
減させる一方で、揚水した地下水を地上の浄化設備によ
り浄化した後で、別の場所から注水を行う浄化工法が提
案されている。この工法は、汚染土壌内に広く水流を形
成して、浸透循環を促進し、土壌中に含まれる汚染物質
を除去するものである。As a means for purifying contaminated soil, for example, a well point or a deep well is placed in a contaminated soil portion in the ground, and groundwater is pumped to reduce the groundwater level, while pumped groundwater is grounded. A purification method has been proposed in which water is injected from another location after having been purified by the purification equipment of. This construction method forms a wide water stream in the contaminated soil, promotes infiltration circulation, and removes pollutants contained in the soil.

【０００４】[0004]

【発明が解決しようとする課題】しかし、高度に汚染さ
れた土壌は、土粒子間隙に汚染物質が存在しており、土
粒子間隙に水や空気が浸入し得ない透水性の悪い状況に
ある。このため、揚水，注水作業を実施したとしても、
地層の層境等において水が行き渡らず、土壌中に含まれ
る汚染物質を十分に除去することができないという問題
があった。特に、シルト質の土壌のように、透水係数が
低い土壌にあっては、上記工法では満足な結果を得るこ
とは困難であった。However, in highly polluted soil, contaminants are present in the pores of soil particles, and water or air cannot enter the pores of the soil particles, resulting in poor water permeability. . Therefore, even if pumping and water injection work is performed,
There has been a problem that water is not spread around the boundary of the strata and the like, and pollutants contained in the soil cannot be sufficiently removed. In particular, it is difficult to obtain a satisfactory result by the above-mentioned construction method in a soil having a low hydraulic conductivity such as silty soil.

【０００５】或いは、タールや重金属による汚染土壌等
を、効果的に浄化する方法として、汚染土壌を非汚染土
壌に入れ替える土壌置換工法が知られている。この土地
置換工法では、確実に汚染土壌の浄化を行うことが可能
であるが、大量の土壌を運搬する際に多量の運搬エネル
ギー等を消費し、ＣＯ２発生を結局は助長するという問
題があった。また、埋め戻し用の土壌を購入するのに多
大なコストがかかるという問題があった。さらに、その
汚染土壌の最終処理も社会的な大問題となっている。[0005] Alternatively, as a method for effectively purifying contaminated soil with tar and heavy metals, a soil replacement method for replacing contaminated soil with non-contaminated soil is known. With this land replacement method, it is possible to surely purify contaminated soil, but there is a problem that a large amount of transportation energy is consumed when a large amount of soil is transported, which eventually promotes CO 2 generation. It was Further, there is a problem that it costs a lot of money to purchase the soil for backfilling. Furthermore, the final treatment of the contaminated soil has become a major social problem.

【０００６】さらにまた、汚染土壌を掘削して取り出
し、プラントに設置した回転ドラムに投入して、洗浄処
理を施し、再度地盤に埋め戻す土壌洗浄法が知られてい
る。しかし、この工法によれば、装置システムが複雑及
び高価であり、また、大量の土砂を処理するためにプラ
ント設備が大規模となり、設置のための広いスペースが
必要となり、設置場所が制限されてしまうという問題が
あった。また、洗浄された土壌の排出や脱水，埋め戻し
を行うために種々の装置が必要とされ、手間とコストが
かかるという問題があった。Further, there is known a soil cleaning method in which contaminated soil is excavated and taken out, put into a rotary drum installed in a plant, subjected to a cleaning treatment, and then buried in the ground again. However, according to this construction method, the equipment system is complicated and expensive, the plant equipment is large in scale for treating a large amount of earth and sand, a large space for installation is required, and the installation place is limited. There was a problem of being lost. In addition, various devices are required for discharging, dewatering and backfilling the washed soil, which causes a problem of labor and cost.

【０００７】また、上記工法において、土壌洗浄を行っ
た洗浄水については、粒径が一定の範囲にある凝集剤を
用いて浄化処理される。つまり、洗浄水に微粒状カーボ
ン等からなる凝集剤を混入して撹拌し、その後、酸性化
剤や高分子凝集剤を添加し、凝集剤に洗浄水中の不純物
を吸着させ、シックナー等で連続的に沈降固液分離する
ものである。洗浄水の浄化処理では、不純物が吸着され
た凝集剤がスラッジとして発生するため、このスラッジ
の処理も行わなければならないという不都合があった。Further, in the above-mentioned construction method, the washing water which has been subjected to the soil washing is purified by using a coagulant having a particle size within a certain range. That is, aggregating agent such as fine carbon particles is mixed into the washing water and stirred, and then an acidifying agent or a polymer aggregating agent is added so that impurities in the washing water are adsorbed to the aggregating agent and continuously applied with a thickener. It is for solid-liquid separation by sedimentation. In the cleaning treatment of the cleaning water, the coagulant in which the impurities are adsorbed is generated as sludge, so that there is an inconvenience that the sludge must also be treated.

【０００８】本発明の目的は、安価な構造でありなが
ら、効率良く土壌洗浄を行うことができる土壌洗浄装置
を提供することにある。また、本発明の他の目的は、省
スペースであり、汚染土壌の浄化処理を現地で行うこと
ができる土壌洗浄装置を提供することにある。さらに、
本発明の目的は、極力、汚染土壌，洗浄水を場外に出す
ことを少なくし、土壌運搬等に要されるエネルギー消費
を低減し、さらに洗浄水を場内で再利用することにより
水の使用量を必要最小限にして、省エネルギー化を実現
した土壌洗浄方法を提供することにある。さらにまた、
本発明の目的は、大きな面積を有する水槽を使用しなく
ても、水槽内に流入する汚濁水に含まれる土粒子等の沈
降を促進することができる取水送気兼用装置を提供する
ことにある。[0008] An object of the present invention is to provide a soil cleaning apparatus which can efficiently perform soil cleaning while having an inexpensive structure. Another object of the present invention is to provide a soil cleaning apparatus that is space-saving and can perform contaminated soil purification treatment on site. further,
The object of the present invention is to minimize the amount of contaminated soil and washing water to be sent out of the site, to reduce the energy consumption required for soil transportation, and to reuse the washing water in the site to reduce the amount of water used. It is to provide a soil cleaning method that realizes energy saving by minimizing the above. Furthermore,
An object of the present invention is to provide an intake and air supply / combined device that can promote the sedimentation of soil particles and the like contained in polluted water flowing into the water tank without using a water tank having a large area. .

【０００９】[0009]

【課題を解決するための手段】上記課題は、本発明の請
求項１に係る土壌洗浄方法によれば、汚染土砂を洗浄す
るエジェクターと、洗浄された土砂を粒径別に分級する
複数の土砂分離槽と、該土砂分離槽の貯留水を濾過する
砂濾過槽と、該砂濾過槽からの濾過水を受け入れる給水
槽と、を少なくとも用いて土壌の洗浄を行う方法であっ
て、前記土砂分離槽に土砂を移送する前に前記エジェク
ターにより汚染土砂を洗浄する処理と、該洗浄された土
砂を土砂分離槽にて沈殿させ粒径別に分級する処理と、
前記土砂分離槽の貯留水をフィルターを備えた管で吸水
する処理と、前記管より微細気泡を発生させて前記フィ
ルターの目詰まりを解消するとともに、前記貯留水に含
まれる汚染物質を分離させる処理と、前記貯留水を前記
砂濾過槽にて濾過する処理と、該砂濾過槽からの濾過水
を給水槽で受け入れて洗浄水として再利用する処理と、
前記土砂分離槽に沈殿した土砂を排出する処理と、を備
えたことにより解決される。According to the soil cleaning method of the first aspect of the present invention, the above-mentioned problems can be solved by: an ejector for cleaning contaminated soil and a plurality of soil separations for classifying the washed soil by particle size. A method for cleaning soil using at least a tank, a sand filtration tank for filtering stored water in the sediment separation tank, and a water supply tank for receiving filtered water from the sand filtration tank, wherein the sediment separation tank A process of cleaning the contaminated earth and sand by the ejector before transferring the earth and sand, and a process of precipitating the washed earth and sand in a sediment separation tank and classifying the particles by particle size,
A process of absorbing the stored water of the sediment separating tank with a pipe provided with a filter, and a process of eliminating clogging of the filter by generating fine bubbles from the pipe and separating pollutants contained in the stored water. A process of filtering the stored water in the sand filter tank, and a process of receiving filtered water from the sand filter tank in a water supply tank and reusing it as wash water,
It is solved by providing the processing which discharges the sediment which settled in the said sediment separation tank.

【００１０】なお、汚染濃度が高い場合は、前記洗浄さ
れた土砂を土砂分離槽にて沈殿させ粒径別に分級する処
理の前に、前記汚染土砂を再洗浄槽に移送し、前記汚染
土砂から汚染物質を分離させる処理を行うと良い。この
とき、再洗浄槽または土砂分離槽にエジェクターを介し
て土砂を移送することにより、汚染土砂から汚染物質を
分離或いは分離されやすい状態とすることができる。そ
して、エジェクター内での吸引空気により微細気泡が発
生され、その気泡により土砂に付着した汚染物質が浮上
される。When the pollutant concentration is high, the polluted sediment is transferred to the rewash tank before the washed sediment is settled in the sediment separation tank and classified according to the particle size. It is advisable to carry out a treatment to separate contaminants. At this time, by transferring the earth and sand to the rewashing tank or the earth and sand separating tank via the ejector, it is possible to separate or easily separate the pollutants from the contaminated earth and sand. Then, fine air bubbles are generated by the suctioned air in the ejector, and the air bubbles cause contaminants adhering to the soil to float.

【００１１】また、本発明の請求項４に係る土壌洗浄方
法によれば、採取された汚染土砂をエジェクターにより
洗浄する処理と、洗浄された土砂を第１の土砂分離槽へ
移送して粗粒土を分級する処理と、前記第１の土砂分離
槽の貯留水を吸水送気兼用フィルター管で吸水する処理
と、前記吸水送気兼用フィルター管より微細気泡を発生
させて前記フィルターの目詰まりを解消するとともに、
前記貯留水に含まれる汚染物質を分離させる処理と、洗
浄された土砂を第２の土砂分離槽へ移送して細粒土を分
級する処理と、前記第２の土砂分離槽の貯留水を吸水送
気兼用フィルター管で吸水する処理と、前記吸水送気兼
用フィルター管より微細気泡を発生させて前記フィルタ
ーの目詰まりを解消するとともに、前記貯留水に含まれ
る汚染物質を分離させる処理と、洗浄された土砂を第３
の土砂分離槽へ移送して微細粒土を分級する処理と、前
記第３の土砂分離槽の貯留水を吸水送気兼用フィルター
管で吸水する処理と、前記吸水送気兼用フィルター管よ
り微細気泡を発生させて前記フィルターの目詰まりを解
消するとともに、前記貯留水に含まれる汚染物質を分離
させる処理と、前記第１の土砂分離槽，第２の土砂分離
槽，第３の土砂分離槽の貯留水を砂濾過槽に移送して濾
過する処理と、濾過水を給水槽に移送し洗浄水として再
利用する処理と、各土砂分離槽に沈殿した土砂を排出す
る処理と、を備えたことにより解決される。According to the soil cleaning method of the fourth aspect of the present invention, a treatment for cleaning the collected contaminated soil with an ejector, and transferring the washed soil to the first sediment separating tank to obtain coarse particles. A process of classifying the soil, a process of absorbing the stored water of the first sediment-separating tank with a filter tube for both water and air supply and suction, and generation of fine bubbles from the filter tube for both water and air supply and suction to clog the filter. With the cancellation
A process for separating pollutants contained in the stored water, a process for transferring the washed earth and sand to a second earth and sand separation tank to classify fine-grained soil, and a water absorption for the water stored in the second earth and sand separation tank. A process of absorbing water with a filter tube that also serves as an air supply, a process of removing clogging of the filter by generating fine bubbles from the filter tube that also serves as an air supply and washing, and a process of separating contaminants contained in the stored water, and washing. 3rd
Of the fine sand particles transferred to the sediment separation tank of No. 3, a process of absorbing the stored water of the third sediment separation tank with a filter tube for both suction and air supply, and fine bubbles from the filter tube for both suction and air supply. To remove the clogging of the filter and to separate the pollutants contained in the stored water, and the first sediment-separation tank, the second sediment-separation tank, and the third sediment-separation tank. A process for transferring the stored water to a sand filter tank for filtration, a process for transferring the filtered water to a water supply tank for reuse as cleaning water, and a process for discharging sediment deposited in each sediment separation tank were provided. Will be solved by.

【００１２】汚染濃度が高い場合は、前記洗浄された土
砂を第１の土砂分離槽へ移送して粗粒土を分級する処理
の前に、前記汚染土砂をエジェクターを介して再洗浄槽
に移送し、前記汚染土砂から汚染物質を分離させる処理
を行うと良い。このように、エジェクターを介して汚染
土砂を移送することにより、土粒子より汚染物質を分離
させ、また、エジェクター内での吸引空気により槽内に
微細気泡が発生し、その気泡により土砂に付着した汚染
物質が浮上される。When the pollutant concentration is high, the contaminated earth and sand is transferred to the re-cleaning tank through an ejector before the treatment of transferring the washed earth and sand to the first earth and sand separating tank to classify coarse-grained soil. However, it is preferable to perform a process of separating pollutants from the contaminated soil. In this way, by transferring the contaminated soil through the ejector, the contaminants are separated from the soil particles, and fine air bubbles are generated in the tank by the suction air in the ejector, and the air bubbles adhere to the soil. Pollutants are surfaced.

【００１３】本発明の土壌洗浄方法によれば、汚染土砂
をエジェクターで洗浄することにより、特に従来では汚
染物質の分離が困難であった粘度，シルト等の粒径の微
細な土砂についても効率的且つ確実に浄化することが可
能であり、汚染された微細粒子の発生量を極めて少なく
することが可能となる。According to the soil cleaning method of the present invention, by cleaning the contaminated earth and sand with an ejector, it is possible to efficiently remove even fine earth and sand having a particle size such as viscosity and silt, which has conventionally been difficult to separate contaminants. Moreover, it is possible to surely purify, and it is possible to extremely reduce the generation amount of contaminated fine particles.

【００１４】また、吸水送気兼用フィルター管で、土砂
分離槽の貯留水を吸水し砂濾過槽に移送するように構成
されているので、土砂分離槽が大きな表面積を有してい
なくても、土砂分離槽への流入量を確保することがで
き、微細土粒子の沈降を促進することが可能である。Further, since the filter tube which is also used for water absorption and air supply is constructed so as to absorb the stored water of the earth and sand separation tank and transfer it to the sand filtration tank, even if the earth and sand separation tank does not have a large surface area, It is possible to secure the amount of inflow to the sediment separation tank, and it is possible to promote the sedimentation of fine soil particles.

【００１５】さらに、吸水送気兼用フィルター管から送
気することにより、フィルターの目詰まりを解消すると
ともに、土砂分離槽に微細気泡を発生させて、土砂分離
槽内の汚染物質を分離することが可能となる。Further, by supplying air from the filter tube that also serves as a water absorption and air supply, it is possible to eliminate the clogging of the filter and to generate fine bubbles in the earth and sand separation tank to separate contaminants in the earth and sand separation tank. It will be possible.

【００１６】また、エジェクターにより土粒子等のＳＳ
成分が流送過程で単粒子化されるので、排土の脱水工程
を大幅に短縮することができ、土砂の埋め戻しを効率的
に行うことが可能となる。さらに、複数の土砂分離槽に
て土砂を分級するので、各土砂分離槽より粒径の揃った
状態の土砂を排出することが可能となる。このため、排
土後に行うシャワーリングや脱水処理を効率的に行うこ
とが可能となる。[0016] In addition, an SS ejects soil particles etc.
Since the components are made into single particles during the flow-through process, the dehydration process of soil discharge can be greatly shortened, and the backfilling of earth and sand can be efficiently performed. Further, since the sediment is classified in the plurality of sedimentation tanks, it is possible to discharge the sediment having a uniform particle size from each sedimentation tank. Therefore, it is possible to efficiently perform the showering and the dehydration treatment performed after soil removal.

【００１７】さらにまた、エジェクターによる流送過程
で土砂の洗浄を行うので、従来の回転ドラム内にて土壌
洗浄する構成等に比して、広いスペースを要することな
く土壌洗浄を行うことが可能となる。また、前記したよ
うに土砂分離槽においても広い表面積を確保する必要が
ないため、汚染土壌の発生した土地や工場敷地内で土壌
洗浄を行うことが可能であり、土壌等の運搬に伴う環境
汚染や、エネルギーの多消費が発生することなく好適で
ある。Furthermore, since the soil is washed in the process of sending by the ejector, the soil can be washed without requiring a large space as compared with the conventional structure in which the soil is washed in the rotating drum. Become. Further, as mentioned above, it is not necessary to secure a large surface area even in the sediment separation tank, so it is possible to wash the soil on the land where the contaminated soil has been generated or on the factory premises, and the environmental pollution caused by the transportation of soil etc. In addition, it is suitable because it does not consume much energy.

【００１８】そして、一連の工程で洗浄に使用した水
を、砂濾過槽で浄化してから給水槽に移送し、各工程に
循環供給して再利用するようにしているので、洗浄水が
場外に出ることがなく、また、水の使用量を必要最小限
にし、コストの増加を防ぐことが可能となる。The water used for cleaning in a series of steps is purified by a sand filter tank, transferred to a water tank, and circulated and supplied to each step for reuse. In addition, the amount of water used can be minimized to prevent an increase in cost.

【００１９】なお、前記再洗浄槽または土砂分離槽での
分離処理がなされた後で、前記再洗浄槽または土砂分離
槽の汚染浮上物質をオーバーフローさせる処理がなされ
る構成とすると、分離された汚染物質を確実に除去する
ことができ好適である。In addition, if the treatment for overflowing the contaminant floating material in the re-cleaning tank or the sediment separating tank is performed after the separation treatment in the re-cleaning tank or the sediment separating tank is performed, the separated pollution It is preferable because the substance can be surely removed.

【００２０】また、前記再洗浄槽での分離処理がなされ
た後で、前記再洗浄槽の貯留水を砂濾過槽に移送して濾
過する処理を行うようにしても良い。After the separation treatment in the recleaning tank, the stored water in the recleaning tank may be transferred to the sand filter tank and filtered.

【００２１】さらに、前記再洗浄槽での分離処理がなさ
れた後で、前記再洗浄槽に圧縮空気にて微細気泡を発生
させて汚染物質を浮上させる処理を行うことにより、再
洗浄槽内の微細土粒子に付着した汚染物質を確実に分離
させることができ好適である。Further, after the separation treatment in the re-cleaning tank is performed, the re-cleaning tank is subjected to a process of generating fine bubbles with the compressed air so as to float up the contaminants. It is preferable because the contaminants attached to the fine soil particles can be reliably separated.

【００２２】また、前記排出された土砂を脱水して埋め
戻す処理において、前記土砂分離槽から排出された土砂
が粒径別に処理されるようにすると、排土後に行うシャ
ワーリングや脱水処理を効率的に行うことができ好適で
ある。In the process of dehydrating and backfilling the discharged earth and sand, if the earth and sand discharged from the sediment separating tank are processed according to the particle size, the showering and the dehydration processing performed after the earth discharging are efficiently performed. Can be carried out in a suitable manner, which is preferable.

【００２３】本発明の土壌洗浄装置は、スラリー化され
た汚染土砂が収納されたスラリー槽と、汚染土砂を粒径
別に沈殿させる複数の土砂分離槽と、前記スラリー槽と
土砂分離槽との間に介在するエジェクターと、前記複数
の土砂分離槽を連結する通水管と、前記複数の土砂分離
槽に配設される吸水送気兼用フィルター管と、前記複数
の土砂分離槽の貯留水を濾過する砂濾過槽と、該砂濾過
槽で濾過された水を洗浄水として循環させる給水槽と、
を備え、前記吸水送気兼用フィルター管により、前記土
砂分離槽内の貯留水が直接吸水されて前記砂濾過槽へ移
送され、前記吸水送気兼用フィルター管より気泡が発生
されてフィルターの目詰まりが解消されるとともに前記
土砂分離槽内の土粒子の汚染物質が分離されることを特
徴とする。The soil cleaning apparatus of the present invention comprises a slurry tank containing contaminated soil which has been slurried, a plurality of sediment separating tanks for precipitating contaminated soil according to particle size, and between the slurry tank and the sediment separating tank. An ejector, a water pipe connecting the plurality of sediment-separating tanks, a filter tube for absorbing and supplying air, which is disposed in the plurality of sediment-separating tanks, and filtering the stored water of the plurality of sediment-separating tanks A sand filtration tank, and a water supply tank for circulating the water filtered by the sand filtration tank as wash water,
The water absorption and air supply / filter filter tube directly absorbs the stored water in the sediment separation tank and is transferred to the sand filtration tank, and bubbles are generated from the water / air supply / air supply filter tube to clog the filter. And the contaminants of the soil particles in the sediment separating tank are separated.

【００２４】上記土壌洗浄装置において、前記吸水送気
兼用フィルター管にはポンプ及びコンプレッサーが接続
され、これらを切り換えることにより、土砂分離槽内の
貯留水を吸水して砂濾過槽へ送水したり、或いは土砂分
離槽内に気泡を発生させ、フィルターの目詰まりを解消
したり、土砂分離槽の貯留水中に含まれる汚染物質を分
離させることが可能となる。In the soil cleaning apparatus, a pump and a compressor are connected to the water absorption and air supply filter tube, and by switching these, the stored water in the sediment separation tank is absorbed and sent to the sand filtration tank, Alternatively, it becomes possible to generate air bubbles in the sediment separating tank to eliminate the clogging of the filter and to separate the pollutants contained in the stored water of the sediment separating tank.

【００２５】また、前記スラリー槽と土砂分離槽との間
には、前記汚染土砂から汚染物質を分離する再洗浄槽を
設けた構成としても良い。さらに、前記スラリー槽と前
記再洗浄槽との間、または前記再洗浄槽と前記土砂分離
槽との間、または前記複数の土砂分離槽間にエジェクタ
ーを設けた構成としても良い。A recleaning tank for separating contaminants from the contaminated earth and sand may be provided between the slurry tank and the earth and sand separation tank. Further, an ejector may be provided between the slurry tank and the recleaning tank, between the recleaning tank and the earth and sand separating tank, or between the plurality of earth and sand separating tanks.

【００２６】さらに、前記土砂分離槽または前記再洗浄
槽に、前記土砂分離槽または再洗浄槽を所定角度で傾斜
可能なエアージャッキを配設することにより、エアージ
ャッキで土砂分離槽または再洗浄槽を傾斜させ、土砂分
離槽または再洗浄槽の水面に浮上した汚染物質をオーバ
ーフローさせて確実に取り除くことが可能となる。Further, an air jack capable of inclining the earth / sand separation tank or the re-cleaning tank at a predetermined angle is arranged in the earth / sand separation tank or the re-cleaning tank, so that the earth-sand separation tank or the re-cleaning tank can be used as an air jack. It is possible to remove the pollutants floating on the water surface of the earth and sand separation tank or the re-cleaning tank by overflowing, and to surely remove them.

【００２７】また、土砂分離槽の下部に、土砂排出用の
開口と、該開口を密閉可能な蓋部材を設けることによ
り、エアージャッキで土砂分離槽を傾斜させ、開口から
各土砂分離槽に沈降した土砂を容易に排出することが可
能となる。Further, by providing an opening for discharging sediment and a lid member capable of sealing the opening at the bottom of the sediment separating tank, the sediment separating tank is tilted by an air jack and settles into each sediment separating tank from the opening. It becomes possible to easily discharge the accumulated sediment.

【００２８】本発明の取水送気兼用装置は、水槽に配設
される取水送気兼用装置であって、ポンプ及びコンプレ
ッサーに接続された切替装置と、該切替装置に接続され
た管部と、該管部に接続された取水送気部と、該取水送
気部に取着されたフィルターと、を有する取水送気兼用
フィルター管を備え、該取水送気兼用フィルター管を配
設することにより所定の取水量を確保し、前記ポンプの
駆動により前記水槽内の水が前記フィルターを介して吸
水されるとともに、前記コンプレッサーの駆動により前
記取水送気部から前記フィルターを介して微細気泡が発
生されることを特徴とするものである。The water intake / air supply / combined device of the present invention is a water intake / air supply / combined device disposed in a water tank, and includes a switching device connected to a pump and a compressor, and a pipe portion connected to the switching device. A water intake and air supply filter tube having an air intake and air supply section connected to the pipe section and a filter attached to the water intake and air supply section is provided, and by providing the water intake and air supply filter tube A predetermined amount of water intake is secured, the water in the water tank is absorbed through the filter by the drive of the pump, and fine bubbles are generated from the intake air supply unit through the filter by the drive of the compressor. It is characterized by that.

【００２９】本発明の取水送気兼用装置を使用すること
により、大きな面積を有する水槽を使用しなくても、水
槽内に流入する汚濁水に含まれる土粒子等の沈降を促進
することが可能となる。すなわち、本発明の取水送気兼
用装置で水槽内の水を槽外に流出させることにより、水
槽への流入量を確保することができる。そして、水槽に
汚濁水が流入されたとき、汚濁水に含まれる土粒子等
は、取水送気兼用装置のフィルターにより槽外への流出
を禁止され、槽内に沈降する。このようにして、槽内に
次々に汚濁水を流入させ、この汚濁水からフィルターに
より土粒子を取り分けて沈降させ、効率的に浄化処理を
行うことが可能となる。By using the water intake and air supply / drainage device of the present invention, it is possible to promote the sedimentation of soil particles contained in the polluted water flowing into the water tank without using a water tank having a large area. Becomes That is, it is possible to secure the amount of inflow into the water tank by causing the water in the water tank to flow out of the tank with the device for combined intake and air supply of the present invention. Then, when polluted water flows into the water tank, soil particles and the like contained in the polluted water are prohibited from flowing out of the tank by the filter of the intake and air feeding / combining device, and settle in the tank. In this way, it becomes possible to carry out the purification treatment efficiently by causing the polluted water to flow into the tank one after another, separating the soil particles from the polluted water by the filter and causing the sediment particles to settle.

【００３０】フィルターに土粒子等が詰まり、通水量が
確保できなくなったときには、吸水送気兼用装置をコン
プレッサーに接続し、取水兼用送気部から微細気泡を発
生させる。このようにして、フィルターの細孔に詰まっ
た土粒子等を除去することができる。また、水槽内に微
細気泡を発生させることにより、水槽内の汚染物質を気
泡に付着させて浮上させ、分離することが可能となる。When the filter is clogged with soil particles or the like and the amount of water flow cannot be ensured, a device for combined use of water intake and air supply is connected to the compressor, and fine air bubbles are generated from the air intake part also serving as water intake. In this way, soil particles and the like clogged in the pores of the filter can be removed. Further, by generating fine bubbles in the water tank, it becomes possible to cause contaminants in the water tank to adhere to the bubbles, float, and be separated.

【００３１】[0031]

【発明の実施の形態】以下、本発明の一実施の形態を図
面に基づいて説明する。なお、以下に説明する部材，配
置等は本発明を限定するものでなく、本発明の趣旨の範
囲内で種々改変することができるものである。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. The members, arrangements, and the like described below do not limit the present invention and can be variously modified within the scope of the gist of the present invention.

【００３２】図１乃至図１０は本発明の一実施例を示す
ものであり、図１は本発明の土壌洗浄装置の全体を示す
概略図、図２はエジェクターの説明図、図３はエアージ
ャッキの説明図、図４は再洗浄槽から油分等の汚染物質
をオーバーフローさせた状態を示す説明図、図５は土砂
分離槽から土砂を排出した状態を示す説明図、図６は土
砂分離槽に吸水送気兼用フィルター管を設けた構成を示
す説明図、図７は吸水送気兼用フィルター管の取水送気
部を示す説明図、図８は吸水送気兼用フィルター管の取
水口を示す拡大説明図、図９は吸水送気兼用フィルター
管による吸水状態及び空気導入状態を示す説明図、図１
０は土壌洗浄方法の工程を示すブロック図である。1 to 10 show one embodiment of the present invention. FIG. 1 is a schematic view showing the entire soil cleaning apparatus of the present invention, FIG. 2 is an explanatory view of an ejector, and FIG. 3 is an air jack. FIG. 4, FIG. 4 is an explanatory view showing a state in which contaminants such as oil have overflowed from the rewashing tank, FIG. 5 is an explanatory view showing a state in which sediment is discharged from the sediment separating tank, and FIG. 6 is a sediment separating tank. FIG. 7 is an explanatory view showing a configuration provided with a filter tube for both water and air supply and absorption, FIG. 7 is an explanatory diagram showing a water intake and air supply portion of the water and air supply filter tube, and FIG. FIG. 9 is an explanatory view showing a water absorption state and an air introduction state by a filter tube that also serves as a water absorption and air supply, FIG.
0 is a block diagram showing the steps of the soil cleaning method.

【００３３】本例では、採取された汚染土壌について、
次の方法により浄化するものである。すなわち、本例の
土壌処理方法は、採取された汚染土砂をエジェクター８
により洗浄し土粒子等ＳＳ成分を単粒子化する処理と、
洗浄された土砂を第１の土砂分離槽３へ移送して粗粒土
を分級する処理と、第１の土砂分離槽３の貯留水を吸水
送気兼用フィルター管１６で吸水する処理と、吸水送気
兼用フィルター管１６より微細気泡を発生させてフィル
ター１６ｄの目詰まりを解消するとともに、第１の土砂
分離槽３の貯留水に含まれる汚染物質を分離させる処理
と、洗浄された土砂を第２の土砂分離槽４へ移送して細
粒土を分級する処理と、第２の土砂分離槽４の貯留水を
吸水送気兼用フィルター管１６で吸水する処理と、吸水
送気兼用フィルター管１６より微細気泡を発生させてフ
ィルター１６ｄの目詰まりを解消するとともに、第２の
土砂分離槽４の貯留水に含まれる汚染物質を分離させる
処理と、洗浄された土砂を第３の土砂分離槽５へ移送し
て微細粒土を分級する処理と、第３の土砂分離槽５の貯
留水を吸水送気兼用フィルター管１６で吸水する処理
と、吸水送気兼用フィルター管１６より微細気泡を発生
させてフィルター１６ｄの目詰まりを解消するととも
に、第３の土砂分離槽５の貯留水に含まれる汚染物質を
分離させる処理と、第１の土砂分離槽３，第２の土砂分
離槽４，第３の土砂分離槽５の貯留水を砂濾過槽６に移
送して濾過する処理と、濾過水を給水槽７に移送し洗浄
水として再利用する処理と、各土砂分離槽３，４，５に
沈殿した土砂を排出する処理と、排出された土砂を脱水
して埋め戻す処理と、を行うものである。これら全ての
処理を１サイクルとし、１サイクルは約３０〜６０分間
で行われる。なお、本例では、排出された土砂を埋め戻
す処理を行っているが、他の用途に使用しても良い。In this example, regarding the collected contaminated soil,
It is purified by the following method. That is, in the soil treatment method of this example, the ejected 8
And the treatment to make the SS component such as soil particles into single particles,
A process of transferring the washed sediment to the first sediment separation tank 3 to classify the coarse-grained soil, a treatment of absorbing the stored water of the first sediment separation tank 3 by the water absorption and air supply filter pipe 16, and a water absorption The fine air bubbles are generated from the air-supply / filter pipe 16 to eliminate the clogging of the filter 16d and to separate the pollutants contained in the stored water of the first sediment-separation tank 3 and the washed soil. 2 to the sediment separation tank 4 to classify fine-grained soil, to absorb the stored water of the second sediment separation tank 4 with the water-intake and air-supply / filter pipe 16, and to perform the water-intake and air-supply / filter pipe 16 A process of generating finer bubbles to eliminate the clogging of the filter 16d and separating contaminants contained in the stored water of the second sediment separating tank 4, and the washed sediment to the third sediment separating tank 5 Transfer to and classify fine grain soil Treatment, the treatment of absorbing the stored water of the third sediment separation tank 5 with the filter tube 16 for both suction and air supply, and the generation of fine air bubbles from the filter tube 16 for both suction and air supply to eliminate clogging of the filter 16d. At the same time, the treatment for separating the pollutants contained in the stored water of the third sediment separating tank 5 and the stored water of the first sediment separating tank 3, the second sediment separating tank 4, and the third sediment separating tank 5 are performed. A process of transferring to the sand filter tank 6 for filtration, a process of transferring the filtered water to the water supply tank 7 for reuse as washing water, and a process of discharging the sediment deposited in each of the sediment separation tanks 3, 4, 5. A process of dehydrating the discharged soil and backfilling is performed. All these processes are set as one cycle, and one cycle is performed for about 30 to 60 minutes. In this example, the discharged soil is backfilled, but it may be used for other purposes.

【００３４】上記土壌洗浄を行うための土壌洗浄装置Ｓ
は、図１に示すように、汚染土壌が収納されたスラリー
槽１と、汚染土壌を吸引し汚染土壌を単粒子化するとと
もに、染物質を分離するエジェクター８と、エジェクタ
ー８から排出された土砂から汚染物質を分離する再洗浄
槽２と、洗浄された土砂を沈殿させる第１の土砂分離槽
３，第２の土砂分離槽４，第３の土砂分離槽５と、これ
ら土砂分離槽３，４，５の貯留水を吸水するとともに、
土砂分離槽３，４，５へ送気し微細気泡を発生させる吸
水送気兼用フィルター管１６と、土砂分離槽３，４，５
から送水された貯留水を濾過する砂濾過槽６と、砂濾過
槽６で濾過された水を受け入れる給水槽７と、再洗浄槽
１及び土砂分離槽３，４，５に配設されたエアージャッ
キ１０と、から構成されている。Soil cleaning device S for performing the above-mentioned soil cleaning
1, as shown in FIG. 1, a slurry tank 1 in which contaminated soil is stored, an ejector 8 that sucks the contaminated soil to convert the contaminated soil into single particles, and separates dye substances, and the soil and sand discharged from the ejector 8. Re-cleaning tank 2 for separating pollutants from the above, first sediment separating tank 3 for precipitating washed sediment, second sediment separating tank 4, third sediment separating tank 5, and these sediment separating tanks 3, While absorbing the stored water of 4 and 5,
A filter tube 16 that also serves as a water-absorbing and air-supplying device that supplies air to the sediment-separation tanks 3, 4, and 5 to generate fine bubbles, and the sediment-separation tanks 3, 4, and 5
The sand filter tank 6 for filtering the stored water sent from the water supply tank, the water supply tank 7 for receiving the water filtered by the sand filter tank 6, the re-cleaning tank 1 and the air provided in the sediment separating tanks 3, 4, and 5. It is composed of a jack 10.

【００３５】第１の土砂分離槽３，第２の土砂分離槽
４，第３の土砂分離槽５は通水管９にて連結されてい
る。土砂分離槽３，４，５の貯留水は、上記吸水送気兼
用フィルター管１６により吸水される他、通水管９も流
通し、最終的に砂濾過槽６にて濾過される。The first earth-sand separation tank 3, the second earth-sand separation tank 4, and the third earth-sand separation tank 5 are connected by a water pipe 9. The stored water in the sediment separating tanks 3, 4, and 5 is absorbed by the filter tube 16 that also serves as water absorption and air supply, and also flows through the water passage tube 9 to be finally filtered by the sand filter tank 6.

【００３６】スラリー槽１には、敷地内でユンボ等によ
り掘削され、ホイールローダー１１により運搬された汚
染土１２が投入され、給水槽７から循環されてきた洗浄
水７ａが適量加えられる。スラリー槽１に汚染土１２を
投入する際には、スラリー槽１の後段で汚染土１２を洗
浄するエジェクター８の管径を考慮して、所定粒径以上
の礫，ガラが投入されないようにする。To the slurry tank 1, the polluted soil 12 excavated by a Yumbo or the like on the site and transported by the wheel loader 11 is put, and an appropriate amount of cleaning water 7a circulated from the water supply tank 7 is added. When introducing the contaminated soil 12 into the slurry tank 1, in consideration of the pipe diameter of the ejector 8 that cleans the contaminated soil 12 in the subsequent stage of the slurry tank 1, prevent gravel and debris having a predetermined particle size or more from being introduced. .

【００３７】このため、本例では、スラリー槽１の上部
に孔が穿設されたスクリーン１ａを設け、所定粒径以上
の礫，ガラを除去するように構成されている。なお、汚
染土１２の性質によっては、スラリー槽１内に適量の反
応剤を添加し、エジェクター８での吸引，流送過程での
汚染物質との分離が促進されるようにする。Therefore, in this example, a screen 1a having holes formed in the upper portion of the slurry tank 1 is provided to remove gravel and debris having a predetermined particle size or more. Depending on the nature of the contaminated soil 12, an appropriate amount of the reaction agent is added to the slurry tank 1 so that the ejector 8 can promote the suction and the separation of the contaminant from the pollutant during the process of sending.

【００３８】エジェクター８は、図１に示すように、ス
ラリー槽１と再洗浄槽２との間、再洗浄槽２と第１の土
砂分離槽３との間に配設されている。エジェクター８
は、図２に示すように、吸引側の管体８ａと、排出側の
管体８ｂと、排出側の管体８ｂに連続して設けられた排
出管８ｃと、吸引側の管体８ａと排出側の管体８ｂの間
に設けられた圧力水管８ｄと、圧力水管に連通した気体
導入管８ｅと、圧力水管内８ｄに駆動高圧水を供給する
圧力水供給源８ｆとを備えて構成されている。As shown in FIG. 1, the ejector 8 is arranged between the slurry tank 1 and the recleaning tank 2, and between the recleaning tank 2 and the first sediment separating tank 3. Ejector 8
2, the suction side pipe body 8a, the discharge side pipe body 8b, the discharge pipe 8c provided continuously to the discharge side pipe body 8b, and the suction side pipe body 8a. A pressure water pipe 8d provided between the discharge side pipe bodies 8b, a gas introduction pipe 8e communicating with the pressure water pipe, and a pressure water supply source 8f for supplying driving high-pressure water into the pressure water pipe 8d are configured. ing.

【００３９】圧力水管８ｄからは、圧力水供給源８ｆか
ら圧送される駆動高圧水が、排出側の管体８ｂへ向けて
送出される。駆動高圧水は、例えば５〜２５０ｋｇ／ｃ
ｍ２の圧力で噴出される。本例では、駆動高圧水として
給水槽７からの洗浄水を再利用している。From the pressure water pipe 8d, the driving high pressure water pressure-fed from the pressure water supply source 8f is delivered toward the discharge side pipe body 8b. Driving high pressure water is, for example, 5 to 250 kg / c
It is jetted at a pressure of m 2 . In this example, the wash water from the water supply tank 7 is reused as the driving high pressure water.

【００４０】駆動高圧水の初速は３０〜６０ｍ／ｓｅｃ
であり、駆動高圧水の境界面には負圧が発生する。した
がって、駆動高圧水が圧力水管８ｄのノズルから噴射さ
れると、噴出した駆動高圧水のエジェクター作用によ
り、気体導入管８ｅから大気が吸入されて、気体混入状
態の圧力水となる。The initial velocity of the driving high pressure water is 30 to 60 m / sec.
Therefore, negative pressure is generated at the boundary surface of the driving high-pressure water. Therefore, when the driving high-pressure water is jetted from the nozzle of the pressure water pipe 8d, the ejected action of the driving high-pressure water sucks the atmosphere from the gas introduction pipe 8e and becomes the pressure-mixed gas.

【００４１】そして、気体混入状態の圧力水が、排出側
の管体８ｂに噴出することにより、吸引側の管体８ａの
内部が真空に近い状態となり、これにより、スラリー槽
１より、スラリー化された汚染土砂１２が吸い上げられ
て、排出側の管体８ｂへ圧送される。汚染土砂１２の吸
引及び圧送は、駆動高圧水の噴出が続く限り継続して行
われる。Then, the pressurized water in a gas mixed state is jetted to the discharge side pipe body 8b to bring the inside of the suction side pipe body 8a into a state close to a vacuum, whereby the slurry tank 1 is made into a slurry. The polluted earth and sand 12 thus taken up is sucked up and is sent under pressure to the pipe body 8b on the discharge side. Suction and pumping of the contaminated earth and sand 12 are continuously performed as long as the driving high-pressure water continues to be ejected.

【００４２】エジェクター８により、スラリー化された
汚染土砂１２が吸引されると、管体内のＡ点において、
吸引された汚染土砂１２と駆動高圧水とが衝突する。こ
れにより、気体，固体，液体の三相状態の衝突が持続さ
れ、その結果、汚染土砂１２に付着していた汚染物質が
分離、或いは分離されやすい状態となる。When the ejector 8 sucks the slurried contaminated earth and sand 12, at the point A in the pipe body,
The polluted soil 12 that has been sucked and the driving high-pressure water collide with each other. As a result, the collision of the three-phase state of gas, solid, and liquid is maintained, and as a result, the contaminants adhering to the contaminated soil 12 are separated or easily separated.

【００４３】エジェクター８による洗浄では、気体混入
状態の圧力水が噴出することにより、土砂、特にシル
ト，粘土等の微細土粒子が単粒子化し、管内で洗浄水と
接しやすくなり、又管内の断面変化により気泡が様々に
変化することにより超音波が発生し、且つ空気の曝気作
用により、汚染物質と土粒子の分離が瞬時に行われる。
このため、従来では、洗浄が困難であった微細土粒子に
ついても好適に洗浄することが可能である。In the cleaning by the ejector 8, the pressure water in the gas mixed state is jetted out, and the fine sand particles such as soil and sand, especially silt and clay are made into single particles, which easily come into contact with the cleaning water in the pipe, and the cross section in the pipe. Ultrasonic waves are generated due to various changes in the bubbles due to the changes, and the aeration action of air causes the contaminants and soil particles to be separated instantaneously.
Therefore, it is possible to preferably wash fine soil particles that have been difficult to wash in the past.

【００４４】なお、本例のエジェクターは、図２に示す
ように、排出側の管体８ｂの管径が、一部で狭くなった
箇所８ｇが形成されている。また、排出側の管体８ｂと
排出管８ｃとの間に凹部８ｈが設けられている。In the ejector of this example, as shown in FIG. 2, a portion 8g where the pipe diameter of the discharge side pipe 8b is partially narrowed is formed. Further, a recess 8h is provided between the discharge-side tube body 8b and the discharge pipe 8c.

【００４５】上記構成により、排出側の管体８ｂを通過
するスラリー化された土砂流は、管径の狭くなった箇所
８ｇでさらに高圧になり、勢いよく流れながら凹部８ｈ
に流れ込み、その後、排出管８ｃへと流出する。With the above-described structure, the slurried earth and sand flow passing through the discharge side pipe body 8b becomes even higher in pressure at the narrowed portion 8g of the pipe diameter, and flows vigorously to form the concave portion 8h.
To the discharge pipe 8c.

【００４６】したがって、エジェクター８のＢ点でも、
凹部８ｈへ向かう土砂流と、排出管８ｃ側へ流下する土
砂流とが衝突し、土砂に付着していた汚染物質が、さら
に分離、或いは分離されやすい状態となる。Therefore, even at the point B of the ejector 8,
The sediment flow toward the recess 8h and the sediment flow down to the discharge pipe 8c collide with each other, and the contaminants attached to the sediment are further separated or easily separated.

【００４７】なお、本例では、スラリー槽１と再洗浄槽
２、及び再洗浄槽２と第１の土砂分離槽３との間にエジ
ェクター８が配設されているが、第１の土砂分離槽３と
第２の土砂分離槽４、第２の土砂分離槽４と第３の土砂
分離槽５との間にエジェクター８を設けた構成としても
良い。In this example, the ejector 8 is arranged between the slurry tank 1 and the re-cleaning tank 2, and between the re-cleaning tank 2 and the first earth and sand separating tank 3. An ejector 8 may be provided between the tank 3 and the second sediment separating tank 4, and between the second sediment separating tank 4 and the third sediment separating tank 5.

【００４８】エジェクター８により洗浄された土砂は、
排出管８ｃから、再洗浄槽２へ移送される。再洗浄槽２
には水道水等の洗浄水が満たされている。この再洗浄槽
２に、スラリー化した洗浄済みの土砂と、土砂から分離
された汚染物質、泡状の気体が排出される。The soil washed by the ejector 8 is
It is transferred to the recleaning tank 2 from the discharge pipe 8c. Rewashing tank 2
Is filled with wash water such as tap water. Slurryed and washed soil, pollutants separated from the soil and foamy gas are discharged to the re-cleaning tank 2.

【００４９】再洗浄槽２では、汚染物質のうち、比重の
軽い油分等の汚染物質が、同時に排出される気体による
エアレーションによって撹拌分離されて水面に浮上す
る。水面に浮上した油分等の汚染物質について、本例で
は、再洗浄槽２の外にオーバーフローさせて除去するこ
とができるように構成されている。In the recleaning tank 2, contaminants such as oil having a low specific gravity among the contaminants are agitated and separated by aeration by the gas discharged at the same time and float on the water surface. In this example, contaminants such as oil floating on the water surface can be removed by overflowing them to the outside of the recleaning tank 2.

【００５０】すなわち、本例の土壌洗浄装置Ｓでは、図
４に示すように、再洗浄槽２の底部側にエアージャッキ
１０が配設されており、このエアージャッキ１０で再洗
浄槽２を傾斜させることにより、水面に浮上した油分等
の汚染物質１３を除去できるように構成されている。That is, in the soil cleaning apparatus S of this example, as shown in FIG. 4, the air jack 10 is arranged on the bottom side of the recleaning tank 2, and the recleaning tank 2 is tilted by this air jack 10. By doing so, the contaminants 13 such as oil floating on the water surface can be removed.

【００５１】再洗浄槽２の上部開口縁部には、再洗浄槽
２よりオーバーフローされた汚染物質を受ける受トレー
２ａが設けられている。受トレー２ａは、再洗浄槽２の
傾斜側の開口縁部に設けられている。受トレー２ａに流
入された汚染物質が、高濃度油分スラッジである場合
は、ストックされ場外処分される。At the upper opening edge of the recleaning tank 2, a receiving tray 2a for receiving the contaminants overflowed from the recleaning tank 2 is provided. The receiving tray 2a is provided at an opening edge portion of the recleaning tank 2 on the inclined side. When the pollutant that has flowed into the receiving tray 2a is high-concentration oil sludge, it is stocked and disposed of outside the site.

【００５２】エアージャッキ１０は、図３に示すよう
に、ガイド１０ａと、空気袋１０ｂと、空気注入口１０
ｃとから構成されており、空気袋１０ｂの外周側辺は、
上下方向に伸縮可能な蛇腹となっている。そして、空気
注入口１０ｃから空気が供給されると、空気袋１０ｂの
蛇腹部分がガイド１０ａに沿って広がるように構成され
ている。エアージャッキ１０は、空気が導入されていな
いときには２２ｍｍ程度であり、再洗浄槽２の設置状態
に影響を与えない程度の薄さとされている。As shown in FIG. 3, the air jack 10 includes a guide 10a, an air bag 10b, and an air inlet 10.
and the outer peripheral side of the air bladder 10b is
It is a bellows that can be expanded and contracted in the vertical direction. Then, when air is supplied from the air inlet 10c, the bellows portion of the air bag 10b is configured to spread along the guide 10a. The air jack 10 has a thickness of about 22 mm when air is not introduced, and is thin enough not to affect the installation state of the recleaning tank 2.

【００５３】したがって、空気注入口１０ｃから空気が
供給されると、空気袋１０ｂの蛇腹の部分が上方へ広が
り、再洗浄槽２のエアージャッキ１０が配設された側が
上方に持ち上げられる。なお、汚染物質１３をオーバー
フローするときには、エアージャッキ１０は１０〜５０
ｍｍ程度の幅で膨張される。Therefore, when air is supplied from the air inlet 10c, the bellows portion of the air bag 10b spreads upward, and the side of the recleaning tank 2 where the air jack 10 is arranged is lifted upward. When the contaminant 13 is overflowed, the air jack 10 is
It is expanded with a width of about mm.

【００５４】このようにして、再洗浄槽２が傾斜し、再
洗浄槽２の水面に浮上した油分等の汚染物質１３が受ト
レー２ａへ移送され、汚染物質１３が除去される。この
ように、土壌洗浄の工程のはじめに、先ず再洗浄槽２に
おいて油分等の汚染物質を除去することにより、次工程
での浄化処理への負荷を軽減することが可能となる。な
お、汚染濃度が比較的低い場合には、再洗浄槽２を設け
ない構成としても良い。In this way, the recleaning tank 2 is inclined, and the contaminants 13 such as oil floating on the water surface of the recleaning tank 2 are transferred to the receiving tray 2a, and the contaminants 13 are removed. In this way, by first removing contaminants such as oil in the rewashing tank 2 at the beginning of the step of soil washing, it is possible to reduce the load on the purification process in the next step. If the contamination concentration is relatively low, the recleaning tank 2 may not be provided.

【００５５】再洗浄槽２で油分等の汚染物質が分離され
た土砂は、エジェクター８を介して第１の土砂分離槽３
へ移送される。本例では、第１の土砂分離槽３，第２の
土砂分離槽４，第３の土砂分離槽５からなる３つの土砂
分離槽を用いて、土砂の分級を行う。The earth and sand from which contaminants such as oil have been separated in the re-cleaning tank 2 are passed through the ejector 8 to the first earth and sand separating tank 3
Be transferred to. In the present example, the classification of the soil is carried out using three sediment separating tanks including the first sediment separating tank 3, the second sediment separating tank 4 and the third sediment separating tank 5.

【００５６】本例の土砂分離槽３，４，５は、設置に広
いスペースを必要とせず、またトラックで運搬可能な大
きさに形成されている。すなわち、本例の土砂洗浄装置
Ｓでは、各土砂分離槽３，４，５に、取水送気兼用装置
としての吸水送気兼用フィルター管１６が配設されてお
り、この吸水送気兼用フィルター管１６にて、土砂分離
槽内の貯留水を吸水することにより、大型の土砂分離槽
３，４，５を用いなくても、土砂の沈降が促進されるよ
うに構成されている。The earth and sand separation tanks 3, 4, and 5 of this example do not require a large space for installation and are formed in a size that can be transported by a truck. That is, in the earth and sand cleaning device S of the present example, the water absorption and air supply / combined filter pipe 16 as the water intake and air supply / combined device is arranged in each of the sediment / separation tanks 3, 4 and 5. By absorbing the stored water in the sediment separation tank at 16, the sedimentation is promoted without using the large sediment separation tanks 3, 4, and 5.

【００５７】一般に、土砂沈降は、水槽の面積と、水槽
への流入量で決定される。粒子の沈降速度は、粒子の粒
径と比重により求められるが（ストークスの理論）、水
槽の面積をＡ、流入量をＱとしたとき、ｖ＝Ｑ／Ａで求
められるｖ値が、土粒子の沈降速度以下であるとき、土
粒子はこの槽内で沈降する。Generally, sedimentation is determined by the area of the water tank and the amount of inflow into the water tank. The sedimentation velocity of particles is obtained by the particle diameter and specific gravity of particles (Stokes' theory), but when the area of the water tank is A and the inflow is Q, the v value obtained by v = Q / A is The soil particles settle in this tank when the sedimentation velocity is less than or equal to.

【００５８】したがって、微細な粒径の土粒子を沈降さ
せるためには、広い面積を有する水槽が必要であった。
しかし、本例の土砂洗浄装置Ｓでは、土砂分離槽３，
４，５に吸水送気兼用フィルター管１６が配設されてお
り、この吸水送気兼用フィルター管１６で土砂分離槽
３，４，５内の貯留水を吸水することにより、土砂分離
槽３，４，５への流入量を確保することができる。吸水
送気兼用フィルター管１６にはフィルター１６ｄが設け
られており、このフィルター１６ｄにより、所定径以上
の土粒子の通過が禁止され、槽内に土粒子が沈降され
る。Therefore, in order to settle the soil particles having a fine particle size, a water tank having a large area was required.
However, in the earth and sand cleaning device S of this example, the earth and sand separation tanks 3,
The water absorption and air supply / filter pipes 16 are disposed in the water suction and air supply / filter pipes 16, and the water absorption / air supply and filter pipes 16 absorb the stored water in the earth and sand separation tanks 3, 4 and 5, respectively. It is possible to secure the inflow amount to 4,5. A filter 16d is provided in the filter tube 16 that also serves as a suction and water supply, and this filter 16d prohibits the passage of soil particles having a predetermined diameter or more, and causes the soil particles to settle in the tank.

【００５９】すなわち、吸水送気兼用フィルター管１６
による吸水量をＱ´とすると、水槽への見かけの流入量
は（Ｑ−Ｑ´）となり、流入量Ｑに吸水量Ｑ´を近づけ
ることにより、槽への流入量を確保することができる。
流入する汚濁水に含まれる土粒子はフィルター１６ｄで
取り分けられ、順次沈降する。このようにして、水槽の
面積が小さくても土粒子の槽内での沈降が促進される。That is, the filter tube 16 which also serves as water absorption and air supply
If the water absorption amount by Q is Q ', the apparent inflow amount into the water tank is (Q-Q'), and by bringing the water absorption amount Q'to the inflow amount Q, the inflow amount into the tank can be secured.
The soil particles contained in the inflowing polluted water are separated by the filter 16d and sequentially settled. In this way, sedimentation of soil particles in the tank is promoted even if the area of the water tank is small.

【００６０】本例の土砂洗浄装置Ｓの土砂分離槽３，
４，５は、より具体的には、開口面積が２．４ｍ×２．
４ｍ＝５．７６ｍ２程度の大きさとなるように形成され
ている。なお、土砂分離槽３，４，５の深さは適宜設定
される。The earth and sand separation tank 3 of the earth and sand cleaning apparatus S of this example
More specifically, the openings 4 and 5 have an opening area of 2.4 m × 2.
It is formed to have a size of about 4 m = 5.76 m 2 . The depths of the sediment separating tanks 3, 4, 5 are set appropriately.

【００６１】ここで、第１の土砂分離槽３，第２の土砂
分離槽４，第３の土砂分離槽５に配設される吸水送気兼
用フィルター管１６について説明する。吸水送気兼用フ
ィルター管１６は、各土砂分離槽３，４，５の大きさに
応じて、適切に吸水及び送気できる本数が配設されてい
る。吸水送気兼用フィルター管１６は、管部１６ａと取
水送気部１６ｂを備え、取水送気部１６ｂから取水した
水を、管部１６ａを介して砂濾過槽６へ移送するように
構成されている。Here, the filter tube 16 for absorbing and supplying air and water, which is arranged in the first earth-sand separation tank 3, the second earth-sand separation tank 4 and the third earth-sand separation tank 5, will be described. The water absorption / air supply filter tube 16 is provided with a number capable of appropriately absorbing and supplying water according to the sizes of the sediment separating tanks 3, 4, and 5. The filter tube 16 that also serves as an air intake / air supply unit is provided with a pipe section 16a and an intake air supply section 16b, and is configured to transfer the water taken from the intake air supply section 16b to the sand filtration tank 6 through the pipe section 16a. There is.

【００６２】図７は、取水送気部１６ｂを示すものであ
る。図示されているように、取水送気部１６ｂには取水
及び送気を行う取水送気口として、複数本の多孔管１６
ｃがクシ型に並列して設けられている。そして、それぞ
れの多孔管１６ｃには、図８に示すようにフィルター１
６ｄが取着され、所定の粒径以上の土粒子が通過できな
いように構成されている。FIG. 7 shows the intake air supply section 16b. As shown in the figure, a plurality of perforated pipes 16 are provided in the intake air supply unit 16b as intake water intake ports for intake and air supply.
c is provided in parallel with the comb type. Then, as shown in FIG. 8, each of the perforated pipes 16c has a filter 1
6d is attached so that soil particles of a predetermined size or larger cannot pass through.

【００６３】フィルター１６ｄは、１〜５μｍ程度の細
孔が設けられ、汚染物質と一部の微細粒土以外は通過で
きないように構成されている。したがって、貯留水中の
汚染物質は極めて粒径が小さいか、或いはイオン化して
いるため、フィルター１６ｄを通過するが、土粒子は通
過を遮断される。なお、各土砂分離槽の沈降土の粒径
は、フィルター１６ｄの細孔の大きさを変えることによ
り調整することができる。このようにして、多孔管１６
ｃに配設されたフィルター１６ｄにより、土砂と汚染物
質の分離が確実に図られる。The filter 16d is provided with pores of about 1 to 5 μm, and is constructed so that only contaminants and a part of fine grain soil can pass through. Therefore, the pollutants in the stored water have an extremely small particle size or are ionized, and thus pass through the filter 16d, but the soil particles are blocked. The particle size of the settled soil in each sediment separating tank can be adjusted by changing the size of the pores of the filter 16d. In this way, the perforated pipe 16
The filter 16d arranged at c ensures the separation of soil and pollutants.

【００６４】土砂分離槽３，４，５に吸水送気兼用フィ
ルター管１６を配設する場合は、吸水送気兼用フィルタ
ー管１６の取水送気部１６ｂが、土砂分離槽３，４，５
の上下方向に重なるように配設する。このとき、吸水及
び送気を偏りなく効果的に行うために、多孔管１６ｃが
互い違いになるように配設する。In the case where the filter tube 16 for absorbing and sending air is also installed in the sediment separating tanks 3, 4, and 5, the intake and air feeding section 16b of the filter tube 16 for absorbing and sending water also serves as the sediment separating tanks 3, 4, and 5.
Are arranged so as to overlap each other in the vertical direction. At this time, the perforated pipes 16c are arranged so as to be staggered in order to effectively and effectively absorb water and supply air.

【００６５】図９に示すように、吸水送気兼用フィルタ
ー管１６には、駆動源としてポンプ１６ｅが接続されて
いる。そして、ポンプ１６ｅが作動しているときには、
吸水送気兼用フィルター管１６は土砂分離槽３，４，５
中の貯留水を吸水し、砂濾過槽６へと移送する。As shown in FIG. 9, a pump 16e as a drive source is connected to the filter tube 16 that also serves as a suction and air supply. Then, when the pump 16e is operating,
The filter tube 16 that also serves as an air intake and water intake is used as a sediment separating tank 3, 4, 5
The stored water inside is absorbed and transferred to the sand filtration tank 6.

【００６６】なお、吸水送気兼用フィルター管１６のフ
ィルター１６ｄに目詰まりが発生したときには、吸水送
気兼用フィルター管１６に圧縮空気を送り、目詰まりを
解消するように構成されている。このため、本例の吸水
送気兼用フィルター管１６には、上記したポンプ１６ｅ
の他、圧縮空気を送付するコンプレッサー１６ｆが接続
されている。そして、切替装置としての切替バルブ１６
ｇを介して、吸水送気兼用フィルター管１６にて貯留水
を吸水することも、或いは、吸水送気兼用フィルター管
１６へ圧縮空気を送付することも、両方できるように構
成されている。When clogging occurs in the filter 16d of the water absorption / air supply filter tube 16, compressed air is sent to the water suction / air supply filter tube 16 to eliminate the clogging. For this reason, the above-mentioned pump 16e is provided in the filter tube 16 for water absorption and air supply of this example.
Besides, a compressor 16f for sending compressed air is connected. And the switching valve 16 as the switching device
It is configured such that the stored water can be absorbed by the water absorption / air supply / filter pipe 16 as well as the compressed air can be sent to the water absorption / air supply / filter pipe 16 via g.

【００６７】すなわち、吸水送気兼用フィルター管１６
に目詰まりが発生した場合は、吸水送気兼用フィルター
管１６を駆動していたポンプ１６ｅから、コンプレッサ
ー１６ｆへ接続を切り替え、コンプレッサー１６ｆから
吸水送気兼用フィルター管１６へ圧縮空気を送り込む。
吸水送気兼用フィルター管１６へ圧縮空気が送り込まれ
ると、フィルター１６ｄに付着していた礫，ガラ，土粒
子等が吹き飛ばされ、フィルター１６ｄの目詰まりが解
消される。That is, the filter tube 16 also serving as water absorption and air supply
If clogging occurs, the connection is switched from the pump 16e that was driving the water / air supply / filter pipe 16 to the compressor 16f, and compressed air is sent from the compressor 16f to the water / air supply / filter pipe 16.
When the compressed air is sent to the filter tube 16 that also serves as the water intake and air supply, the gravel, debris, soil particles, etc. adhering to the filter 16d are blown away, and the clogging of the filter 16d is eliminated.

【００６８】また、吸水送気兼用フィルター管１６へ圧
縮空気が送り込まれ、フィルター１６ｄを通して気泡を
発生させることにより、汚染物質を気泡に付着させて浮
上させることが可能となる。このようにして、貯留水に
おける汚染物質の濃度低下を図ることができる。Further, the compressed air is sent to the filter tube 16 which also serves as a suction and water supply, and bubbles are generated through the filter 16d, whereby contaminants can be attached to the bubbles and floated. In this way, the concentration of pollutants in the stored water can be reduced.

【００６９】そして、吸水送気兼用フィルター管１６が
複数本配設されている場合は、一部の吸水送気兼用フィ
ルター管１６について、圧縮空気を送り込む用途のみと
して使用し、槽内に連続して圧縮空気を送り込むように
すると好適である。When a plurality of filter tubes 16 for both water absorption and air supply are provided, some of the water absorption and air supply filter tubes 16 are used only for the purpose of feeding compressed air, and are continuously used in the tank. It is preferable to send compressed air.

【００７０】なお、第３の土砂分離槽５には、微細粒土
５ａが沈殿しており、圧縮空気が送り込まれたときに微
細粒土５ａが貯留水中に拡散して、吸水送気兼用フィル
ター管１６のフィルター１６ｄに目詰まりが発生しやす
くなる。In the third earth and sand separation tank 5, fine-grained soil 5a is settled, and when compressed air is fed, the fine-grained soil 5a diffuses in the stored water, and the filter also serves as a water absorption and air supply filter. The filter 16d of the tube 16 is likely to be clogged.

【００７１】このため、図６に示すように、第３の土砂
分離槽５内に、土砂分離槽５の底部側から水面上に達す
るまでの範囲で槽内を被覆し、被覆された部分への微細
粒土５ａの浸入を防止するフィルター５ｂを設置し、フ
ィルターで被覆された範囲で、吸水送気兼用フィルター
管１６にて上澄を吸水するようにすると好適である。フ
ィルター５ｂには、１〜５μｍ程度の細孔が設けられて
いると好適である。For this reason, as shown in FIG. 6, the third soil-separation tank 5 is covered within the range from the bottom side of the soil-separation tank 5 to reach the surface of the water. It is preferable to install the filter 5b for preventing the infiltration of the fine grained soil 5a, and to absorb the supernatant in the filter tube 16 which also serves as a water-absorbing and air-feeding area in the range covered by the filter. It is preferable that the filter 5b be provided with pores of about 1 to 5 μm.

【００７２】フィルター５ｂが目詰まりした場合は、吸
水送気兼用フィルター管１６よりエアーを吹き付けた
り、フィルター５ｂを振動させたり、或いは、フィルタ
ー５ｂに囲まれている側から圧力水を流通させることに
より解消する。When the filter 5b is clogged, air may be blown from the filter tube 16 that also serves as a water absorption and air supply, the filter 5b may be vibrated, or pressure water may be circulated from the side surrounded by the filter 5b. Resolve.

【００７３】なお、第１の土砂分離槽３，第２の土砂分
離槽４，第３の土砂分離槽５に、汚染物質ガスの大気へ
の蒸発を防止する蓋を設けた構成としても良い。また、
気泡発生及び吸水を行う吸水送気兼用フィルター管１６
を、再洗浄槽２に設けた構成としても良い。The first earth-sand separation tank 3, the second earth-sand separation tank 4 and the third earth-separation tank 5 may be provided with a lid for preventing evaporation of pollutant gas into the atmosphere. Also,
Filter tube 16 for both water absorption and air supply for generating bubbles and absorbing water
May be provided in the recleaning tank 2.

【００７４】第１の土砂分離槽３，第２の土砂分離槽
４，第３の土砂分離槽５は通水管９で連結され、それぞ
れの土砂分離槽３，４，５の貯留水が、通水管９を通っ
て次の工程へ移動するように構成されている。The first sediment-separation tank 3, the second sediment-separation tank 4, and the third sediment-separation tank 5 are connected by a water pipe 9, and the stored water in the sediment-separation tanks 3, 4, and 5 is connected to each other. It is configured to move to the next step through the water pipe 9.

【００７５】通水管９の取水口には、フィルター９ａが
設けられている。フィルター９ａには５〜１０μｍ程度
の細孔が設けられ、所定の粒径以上の礫，ガラ，土粒子
が通過できないように構成されている。A filter 9a is provided at the water intake of the water pipe 9. The filter 9a is provided with pores of about 5 to 10 μm and is configured so that gravel, debris, and soil particles having a predetermined particle size or more cannot pass through.

【００７６】通水管９に設けられるフィルター９ａの細
孔は、第１の土砂分離槽３に設けられているフィルター
９ａの孔が最も大きく、次に、第２の土砂分離槽４に設
けられているフィルター９ａの孔が大きく、第３の土砂
分離槽５に設けられているフィルター９ａの孔が最も小
さくなるように構成されている。The pores of the filter 9a provided in the water pipe 9 are the largest in the filter 9a provided in the first earth-sand separation tank 3, and next in the second earth-sand separation tank 4. The filter 9a has a large hole, and the filter 9a provided in the third sediment separating tank 5 has the smallest hole.

【００７７】なお、土砂分離槽３，４，５には、吸水送
気兼用フィルター管１６より微細な気泡が導入されてい
るので、フィルター９ａへの目詰まりは発生しにくくな
っているが、次第に目詰まりが発生した場合は、フィル
ター９ａに振動を与え、フィルター９ａに付着した土粒
子をふるい落として、フィルター９ａの目詰まりを解消
する。Since fine air bubbles are introduced into the sediment separating tanks 3, 4 and 5 from the filter tube 16 which also serves as a suction and air supply, the filter 9a is less likely to be clogged, but gradually. When clogging occurs, the filter 9a is vibrated to remove the dirt particles adhering to the filter 9a and eliminate the clogging of the filter 9a.

【００７８】また、それぞれの土砂分離槽３，４，５の
下部には、図５に示すように、土砂分離槽３，４，５内
で沈殿した土砂を排出するための土砂排出口１４が設け
られている。土砂排出口１４は、土砂分離槽３，４，５
の周壁に設けられた開口１４ａと、この開口１４ａを被
覆する蓋体１４ｂとから構成されている。Further, as shown in FIG. 5, a sediment discharge port 14 for discharging sediment deposited in the sediment separation tanks 3, 4 and 5 is provided at the bottom of each sediment separation tank 3, 4 and 5. It is provided. The earth and sand discharge port 14 is used for the earth and sand separation tanks 3, 4, and 5.
It is composed of an opening 14a provided in the peripheral wall and a lid 14b covering the opening 14a.

【００７９】蓋体１４ｂは、上部側が土砂分離槽３，
４，５に固着され、下部側が開閉可能とされている。蓋
体１４ｂは、土砂排出時以外は、パッキング体等により
土砂分離槽３，４，５の開口に密着して配設されるよう
に構成されている。The lid 14b has an upper part on the upper side of the sediment separating tank 3,
It is fixed to 4, 5 and the lower side can be opened and closed. The lid 14b is configured to be closely attached to the openings of the sediment separating tanks 3, 4 and 5 by a packing body or the like except when discharging the sediment.

【００８０】各土砂分離槽３，４，５には、水道水等の
洗浄水が満たされている。この土砂分離槽３，４，５
に、洗浄済みの土砂と、土砂から分離された汚染物質、
泡状の気体が排出される。Each of the sediment separating tanks 3, 4 and 5 is filled with washing water such as tap water. This sediment separation tank 3,4,5
The washed soil and pollutants separated from the sediment,
Bubble-like gas is discharged.

【００８１】また、各土砂分離槽３，４，５には、エア
ージャッキ１０が設けられている。土砂分離槽３，４，
５に配設されたエアージャッキ１０は、後述するよう
に、土砂分離槽３，４，５内に沈降した土砂を排出する
際に、土砂分離槽３，４，５を傾斜させるために設けら
れている。An air jack 10 is provided in each of the sediment separating tanks 3, 4 and 5. Sediment separation tank 3, 4,
As will be described later, the air jack 10 arranged in 5 is provided to incline the sediment separating tanks 3, 4, 5 when discharging the sediment settled in the sediment separating tanks 3, 4, 5. ing.

【００８２】第１の土砂分離槽３には、再洗浄槽２から
移送されてきた洗浄済みの土砂と、土砂から分離された
汚染物質、泡状の気体が流れ込む。そして、流入した土
砂のうち、粗粒土３ａ等の比重の大きいものが沈殿す
る。なお、比重の軽いシルト分等は水中に浮遊して濁水
を形成する。The cleaned earth and sand transferred from the re-cleaning tank 2, the pollutants separated from the earth and sand, and the foamy gas flow into the first earth and sand separating tank 3. Then, of the inflowing sediment, those having a large specific gravity, such as the coarse-grained soil 3a, are precipitated. In addition, silt and the like with a low specific gravity float in water to form turbid water.

【００８３】第１の土砂分離槽３の濁水は、通水管９を
介して第２の土砂分離槽４へ移送される。また、第１の
土砂分離槽３の濁水の一部は、吸水送気兼用フィルター
管１６により、砂濾過槽６へ移送される。The turbid water in the first sediment separating tank 3 is transferred to the second sediment separating tank 4 through the water pipe 9. Further, a part of the turbid water in the first earth and sand separation tank 3 is transferred to the sand filtration tank 6 by the filter tube 16 that also serves as a suction and air supply.

【００８４】第２の土砂分離槽４では、第１の土砂分離
槽３から移送されてきた土砂のうち、細粒土４ａ等が沈
殿する。そして、第２の土砂分離槽４でも、比重の軽い
シルト分等は水中に浮遊して濁水を形成する。In the second earth-and-sand separation tank 4, the fine-grained soil 4a and the like precipitate out of the earth and sand transferred from the first earth-and-sand separation tank 3. Then, also in the second sediment separating tank 4, silt components having a low specific gravity are suspended in water to form muddy water.

【００８５】第２の土砂分離槽４の濁水は、通水管９を
介して、第３の土砂分離槽５に移送される。また、第２
の土砂分離槽４の濁水の一部は、吸水送気兼用フィルタ
ー管１６により、砂濾過槽６へ移送される。Turbid water in the second sediment separating tank 4 is transferred to the third sediment separating tank 5 through the water pipe 9. Also, the second
Part of the turbid water in the earth and sand separation tank 4 is transferred to the sand filtration tank 6 by the filter tube 16 that also serves as a suction and air supply.

【００８６】第３の土砂分離槽５では、第２の土砂分離
槽４から移送されてきた土砂のうち、微細粒土５ａ等が
沈殿する。第３の土砂分離槽５の貯留水は、通水管９及
び吸水送気兼用フィルター管１６により、砂濾過槽６へ
移送される。In the third soil-separation tank 5, the fine-grained soil 5a and the like of the earth and sand transferred from the second soil-separation tank 4 settle. The stored water in the third earth and sand separation tank 5 is transferred to the sand filtration tank 6 by the water pipe 9 and the filter tube 16 that also serves as a suction and air supply.

【００８７】砂濾過槽６には、粒径の異なる砂濾材が層
状に重ねて配設されており、この砂濾材を汚水が流通し
ていく間に、汚水に含まれる汚染物質が砂濾材に付着し
て除去されるように構成されている。Sand filter media having different particle diameters are arranged in layers in the sand filter tank 6. While the waste water is flowing through the sand filter material, contaminants contained in the waste water are converted to the sand filter material. It is configured to be attached and removed.

【００８８】砂濾過槽６では、汚水が砂濾材を通過する
過程で、汚染物質の大半が砂濾材によって吸着捕捉され
る。よって、汚水が砂濾過槽６の底部に達して濾過水と
なった時点では、濾過水は洗浄が完了した状態となって
いる。濾過水は、ポンプ６ｂに接続された吸引用配管６
ａにより吸引され、給水槽７に移送される。そして、給
水槽７に蓄積された濾過水は、洗浄水として再利用され
る。In the sand filter tank 6, most of the pollutants are adsorbed and captured by the sand filter medium in the process of the sewage passing through the sand filter medium. Therefore, when the dirty water reaches the bottom of the sand filter tank 6 and becomes the filtered water, the filtered water is in a state where the cleaning is completed. The filtered water is the suction pipe 6 connected to the pump 6b.
It is sucked by a and transferred to the water supply tank 7. Then, the filtered water accumulated in the water supply tank 7 is reused as washing water.

【００８９】なお、砂濾過槽６の他にゼオライト槽（図
示せず）を設け、重金属イオンや、エマルジョン化した
油を除去する構成としても良い。また、給水槽７に移送
された濾過水について、さらに浄化が必要である場合
は、水処理装置１５に移送され化学的処理を行う構成と
しても良い。In addition to the sand filter tank 6, a zeolite tank (not shown) may be provided to remove heavy metal ions and oil emulsified. Further, when the filtered water transferred to the water supply tank 7 needs to be further purified, it may be transferred to the water treatment device 15 for chemical treatment.

【００９０】例えば、濾過水に水銀化合物が含有されて
いる場合は、濾過水は中和処理槽１５ａに移され、硫化
ソーダもしくは水硫化ソーダが添加され、不溶性の硫化
水銀が生成される。For example, when the filtered water contains a mercury compound, the filtered water is transferred to the neutralization treatment tank 15a, and sodium sulfide or sodium hydrosulfide is added to produce insoluble mercury sulfide.

【００９１】また、濾過水にヒ素が含有されている場合
は、過剰の第二鉄塩が添加され、不溶性の砒酸鉄とされ
た後、凝集沈殿槽１５ｂにおいて水酸化鉄と共に凝集分
解される。或いは、濾過水に鉛が含まれている場合は、
アルカリ剤が投入されてｐＨ＝９〜１０に調整され、凝
集沈殿して分離される。When the filtered water contains arsenic, excess ferric salt is added to form insoluble iron arsenate, which is then coagulated and decomposed together with iron hydroxide in the coagulating sedimentation tank 15b. Or, if the filtered water contains lead,
The pH is adjusted to 9 to 10 by adding an alkaline agent, and the particles are aggregated and separated for separation.

【００９２】その他、汚染物質に応じた水処理がなされ
る。化学的処理がなされた濾過水は、フィルタープレス
１５ｃを通過させることによりスラッジが取り除かれ、
清水槽へ移送される。スラッジは脱水された後、場外処
理される。In addition, water treatment is performed according to the pollutants. Sludge is removed from the chemically treated filtered water by passing it through a filter press 15c,
Transferred to a fresh water tank. The sludge is dehydrated and then treated outside the plant.

【００９３】以上のようにして、汚染土１２から汚染物
質が分離され、汚染物質は、エジェクター８による洗浄
処理、再洗浄槽２からのオーバーフロー処理、吸水送気
兼用フィルター管１６による砂濾過槽６への送水、及び
微細気泡による汚染物質の浮上処理、砂濾過槽６での濾
過処理により除去され、各土砂分離槽３，４，５内には
洗浄済みの土砂が沈降する。As described above, the pollutants are separated from the polluted soil 12, and the pollutants are cleaned by the ejector 8, overflow from the recleaning tank 2, and the sand filter tank 6 using the filter tube 16 for absorbing and supplying air and water. To the soil, the contaminants are removed by the floating process of the contaminants by the fine bubbles and the filtering process in the sand filter tank 6, and the washed sediments settle in the sediment separation tanks 3, 4 and 5.

【００９４】洗浄済みの土砂は、土砂分離槽３，４，５
内の残留水が全て排水された後、土砂分離槽３，４，５
の外に排出される。なお、土砂分離槽３，４，５内の排
水は、吸水送気兼用フィルター管１６により吸水して行
っても良い。このとき、第３の土砂分離槽５，第２の土
砂分離槽４，第１の土砂分離槽３の順で吸水を行うと良
い。The washed earth and sand are collected in the earth and sand separating tanks 3, 4, and 5.
After all the residual water inside is drained, the sediment separation tank 3, 4, 5
Is discharged to the outside. The drainage in the sediment separating tanks 3, 4 and 5 may be carried out by absorbing water with the filter tube 16 which also serves as a water absorption and air supply. At this time, water may be absorbed in the order of the third earth-sand separation tank 5, the second earth-sand separation tank 4, and the first earth-sand separation tank 3.

【００９５】すなわち、この順番で吸水を行うことによ
り、砂濾過槽６で吸着される汚染物質の量が次第に増加
することになるので、特に、はじめの段階で砂濾過槽６
による浄化処理がスムーズに行われ、効率的に濾過処理
を行うことができる。That is, since water is absorbed in this order, the amount of contaminants adsorbed in the sand filter tank 6 gradually increases.
The purification process by means of is smoothly performed, and the filtration process can be efficiently performed.

【００９６】排土を行う際は、各土砂分離槽３，４，５
の下面に配設されたエアージャッキ１０を用いて土砂分
離槽３，４，５を傾け、土砂分離槽３，４，５内の土砂
を排出する。土砂を排出する場合は、エアージャッキ１
０が３００ｍｍ程度膨張し、再洗浄槽２にて汚染物質１
３をオーバーフローさせるときよりも、より急な角度で
傾斜するようにする。At the time of discharging the soil, each of the sediment separating tanks 3, 4, 5
The earth and sand separating tanks 3, 4, and 5 are tilted by using the air jack 10 arranged on the lower surface of the above, and the earth and sand in the earth and sand separating tanks 3, 4, and 5 are discharged. When discharging dirt, air jack 1
0 expands about 300 mm and pollutants 1 in the re-cleaning tank 2
Make a steeper angle than when overflowing 3.

【００９７】エアージャッキ１０が膨張すると、土砂分
離槽３，４，５の、エアージャッキ１０が配設された側
が上方に持ち上げられる。土砂分離槽３，４，５が傾斜
することにより、土砂分離槽３，４，５の下方に設けら
れた土砂排出口１４より、土砂分離槽３，４，５内の土
砂がスムーズに排出される。When the air jack 10 expands, the side of the earth and sand separating tanks 3, 4, 5 on which the air jack 10 is arranged is lifted upward. As the sediment separation tanks 3, 4, 5 are inclined, the sediments in the sediment separation tanks 3, 4, 5 are smoothly discharged from the sediment discharge port 14 provided below the sediment separation tanks 3, 4, 5. It

【００９８】本例の土壌洗浄装置Ｓでは、第１の土砂分
離槽３で粗粒土３ａが分離され，第２の土砂分離槽４で
細粒土４ａが分離され，第３の土砂分離槽５で微細粒土
５ａが分離されるように構成されているので、それぞれ
の土砂分離槽３，４，５からは粒径の揃った土砂が排出
される。In the soil cleaning apparatus S of this example, the coarse-grained soil 3a is separated in the first sediment-separation tank 3, the fine-grained soil 4a is separated in the second sediment-separation tank 4, and the third sediment-separation tank. Since the fine-grained soil 5a is separated at 5, the sediments having uniform particle diameters are discharged from the sediment separation tanks 3, 4, and 5, respectively.

【００９９】したがって、排土処理としてシャワーリン
グを行う際には、各粒径に適正な水圧で行うことができ
る。また、本例の土壌洗浄装置Ｓによれば、エジェクタ
ーにより土粒子等のＳＳ成分が流送過程で単粒子化され
ているので、排土の脱水工程を大幅に短縮することがで
きる。脱水を行う際には、各粒径の土砂毎に、最適な水
切り孔が形成された脱水用ネットや脱水用トレイ等の脱
水装置１７を用い、効率的に水切りすることが可能とな
る。Therefore, when the shower ring is used as the earth unloading treatment, the water pressure can be adjusted appropriately for each particle size. Further, according to the soil cleaning apparatus S of the present example, since the SS component such as soil particles is made into single particles by the ejector in the process of sending, it is possible to significantly shorten the dehydration step of soil discharge. When performing dewatering, it is possible to efficiently drain water by using a dewatering device 17 such as a dewatering net or a dewatering tray in which optimum draining holes are formed for each soil having each particle size.

【０１００】脱水処理がなされた土砂は、クレーンによ
り土砂受トレイ１８に移送され、ここで、汚染物質が十
分に除去されているかどうか簡易分析がなされる。その
後、土砂は粒径別にストックヤードに一時的にストック
され、最終的に検査した後、埋め戻し処理がなされる。The dehydrated earth and sand is transferred to the earth and sand receiving tray 18 by a crane, and a simple analysis is performed here whether pollutants are sufficiently removed. After that, the earth and sand are temporarily stocked in a stockyard according to the particle size, finally inspected, and then backfilled.

【０１０１】本例の土壌洗浄装置Ｓから排出される土砂
は、排土の粒径が揃っているので、再利用も容易であ
る。粗粒土３ａや細粒土４ａは脱水が好適に行われるた
め、そのまま埋め戻したり、建築用の下地材としての再
利用が可能である。微細粒土５ａは脱水性能が低いが、
発生量も少量であり、生石灰にて処理後、埋め戻しが可
能であり、またセメント等とともにコンクリートの材料
として使用することが可能である。The earth and sand discharged from the soil cleaning apparatus S of this example have a uniform particle size for discharge, and therefore can be easily reused. Since the coarse-grained soil 3a and the fine-grained soil 4a are suitably dehydrated, they can be backfilled as they are or reused as a base material for construction. The fine-grained soil 5a has low dehydration performance,
The generated amount is also small, and it can be backfilled after being treated with quicklime, and can be used as a material for concrete together with cement or the like.

【０１０２】ここで、本例の土壌洗浄方法の工程につい
て、図１０のブロック図にて説明する。先ず、汚染土が
スラリー槽１に投入され、給水槽７から洗浄水が供給さ
れ、スラリー化された汚染土が得られる（ステップＳ
１）。次いで、スラリー槽１の汚染土がエジェクター８
により吸引される。汚染土は、エジェクター８による流
送過程で汚染物質が分離または分離されやすい状態とさ
れ、洗浄済みの土砂、土砂から分離された汚染物質が再
洗浄槽２に移送される（ステップＳ２）。Here, the steps of the soil cleaning method of this example will be described with reference to the block diagram of FIG. First, the polluted soil is put into the slurry tank 1, the cleaning water is supplied from the water supply tank 7, and the polluted soil made into a slurry is obtained (step S).
1). Then, the contaminated soil in the slurry tank 1 is ejected by the ejector 8.
Is aspirated by. The polluted soil is brought into a state where pollutants are separated or easily separated in the process of being sent by the ejector 8, and the washed soil and the pollutants separated from the soil are transferred to the rewashing tank 2 (step S2).

【０１０３】エジェクター８から排出される微細気泡に
より、再洗浄槽２の水面には汚染物質が浮上され、この
汚染浮上物質は、エアージャッキ１０で再洗浄槽２を傾
けることによりオーバーフローされる（ステップＳ
３）。再洗浄槽２内の土砂は、エジェクター８を介して
第１の土砂分離槽３に移送される（ステップＳ４）。The fine bubbles discharged from the ejector 8 cause contaminants to float on the water surface of the recleaning tank 2, and the contaminant floating material is overflowed by tilting the recleaning tank 2 with the air jack 10 (step). S
3). The sediment in the rewashing tank 2 is transferred to the first sediment separating tank 3 via the ejector 8 (step S4).

【０１０４】第１の土砂分離槽３では、粗粒土が沈殿し
分離される（ステップＳ５）。第１の土砂分離槽３の貯
留水は、通水管９を介して第２の土砂分離槽４へ移送さ
れる（ステップＳ６）。さらに、第１の土砂分離槽３の
貯留水は、吸水送気兼用フィルター管１６を介して砂濾
過槽６へ移送される（ステップＳ７）。Coarse-grained soil is precipitated and separated in the first sediment separating tank 3 (step S5). The stored water in the first earth and sand separation tank 3 is transferred to the second earth and sand separation tank 4 via the water pipe 9 (step S6). Further, the stored water in the first earth and sand separation tank 3 is transferred to the sand filtration tank 6 via the filter tube 16 that also serves as a suction and air supply (step S7).

【０１０５】第２の土砂分離槽４では、細粒土が沈殿し
分離される（ステップＳ８）。第２の土砂分離槽４の貯
留水は、通水管９を介して第３の土砂分離槽５へ移送さ
れる（ステップＳ９）。さらに、第２の土砂分離槽４の
貯留水は、吸水送気兼用フィルター管１６を介して砂濾
過槽６へ移送される（ステップＳ１０）。In the second sediment separating tank 4, fine soil is precipitated and separated (step S8). The stored water in the second sediment separating tank 4 is transferred to the third sediment separating tank 5 through the water pipe 9 (step S9). Further, the stored water in the second earth and sand separation tank 4 is transferred to the sand filtration tank 6 via the filter tube 16 that also serves as a suction and air supply (step S10).

【０１０６】第３の土砂分離槽５では、微細粒土が沈殿
し分離される（ステップＳ１１）。第３の土砂分離槽５
の貯留水は、通水管９及び吸水送気兼用フィルター管１
６を介して砂濾過槽６へ移送される（ステップＳ１
２）。In the third sediment separating tank 5, fine-grained soil is precipitated and separated (step S11). Third sediment separating tank 5
The stored water is the water pipe 9 and the filter pipe 1 that also serves as a suction and air supply.
It is transferred to the sand filtration tank 6 via 6 (step S1
2).

【０１０７】砂濾過槽６では汚染水が濾過され、その濾
過水は吸引用配管により吸引され、給水槽７に移送され
る（ステップＳ１３）。また、各土砂分離槽３，４，５
のほぼ全ての貯留水が、砂濾過槽６に移送されたことが
確認されたら、エアージャッキ１０で各土砂分離槽３，
４，５を傾斜させ、土砂分離槽３，４，５に沈殿した土
砂を排出する（ステップＳ１４）。Contaminated water is filtered in the sand filter tank 6, and the filtered water is sucked by the suction pipe and transferred to the water supply tank 7 (step S13). In addition, each sediment separation tank 3, 4, 5
When it is confirmed that almost all of the stored water in the sand filtration tank 6 has been transferred to the sand filtration tank 6, the air jack 10 is used to separate the sediment separation tanks 3,
Slopes 4 and 5 are discharged, and the sediment deposited in the sediment separating tanks 3, 4 and 5 is discharged (step S14).

【０１０８】排出された土砂は、粒径別にシャワーリン
グされ、脱水用トレイに載置されて脱水処理が行われ
（ステップＳ１５）、検査後、用途別に埋め戻しがなさ
れる（ステップＳ１６）。The discharged earth and sand are showered according to the particle size, placed on a dewatering tray for dewatering treatment (step S15), and after inspection, they are backfilled for each purpose (step S16).

【０１０９】なお、上記実施例において、連続して土壌
洗浄処理を行う場合は、スラリー槽を二槽用意し、交互
に土壌を充填しながら、洗浄処理を行うと良い。また、
採取箇所によって異なる汚染物質が付着している場合に
ついても、スラリー槽を複数用意し、汚染物質の種類に
よって土壌を分類し、別々のスラリー槽に収納するよう
にすると良い。In the above embodiment, when the soil cleaning treatment is continuously performed, it is preferable to prepare two slurry tanks and perform the cleaning treatment while alternately filling the soil. Also,
Even when different pollutants are attached depending on the sampling location, it is advisable to prepare a plurality of slurry tanks, classify the soil according to the types of pollutants, and store them in separate slurry tanks.

【０１１０】また、上記実施例では、再洗浄槽２に浮上
した油分を、エアージャッキ１０を用いて再洗浄槽２を
傾斜させることによりオーバーフローさせる構成を示し
たが、これに限らず、第１の土砂分離槽３，第２の土砂
分離槽４，第３の土砂分離槽５について、浮上した汚染
物質をエアージャッキ１０を用いてオーバーフローさせ
るようにしても良い。In the above embodiment, the oil floating in the recleaning tank 2 is overflowed by inclining the recleaning tank 2 using the air jack 10, but the invention is not limited to this. In the earth and sand separation tank 3, the second earth and sand separation tank 4 and the third earth and sand separation tank 5, the floating contaminants may be overflowed using the air jack 10.

【０１１１】この場合、第１の土砂分離槽３，第２の土
砂分離槽４，第３の土砂分離槽５に配設された通水管９
のフィルター９ａについて、通常のフィルターと，水の
流通をストップ可能な蓋体とに切替可能としておき、汚
染物質をオーバーフローさせるときは、蓋体で通水管９
の流通をストップさせ、通水管９による土砂分離槽同士
の接続を解除してから行うようにすると良い。In this case, the water pipes 9 arranged in the first earth-sand separation tank 3, the second earth-sand separation tank 4, and the third earth-sand separation tank 5.
The filter 9a of No. 1 can be switched between a normal filter and a lid that can stop the flow of water. When overflowing contaminants, the water pipe 9
It is advisable to stop the flow of the water and to disconnect the earth and sand separation tanks from each other by the water pipe 9 before performing the operation.

【０１１２】また、上記実施例では、粗粒土，細粒土，
微細粒土を含む土壌の洗浄を行う例を示したが、これに
限らず、本例の土壌洗浄装置は、河川・湖沼の浄化、工
場やガソリンスタンド等から排出される汚染水の浄化、
簡易下水処理等、他の用途にも使用することが可能であ
る。In the above embodiment, coarse-grained soil, fine-grained soil,
Although an example of cleaning soil containing fine-grained soil has been shown, the soil cleaning apparatus of this example is not limited to this, and purification of rivers and lakes, purification of contaminated water discharged from factories, gas stations, etc.
It can also be used for other purposes such as simple sewage treatment.

【０１１３】さらに、上記実施例では、エジェクター８
と吸水送気兼用フィルター管１６を組み合わせて使用す
る構成を示したが、エジェクター８を使用せずに、汚染
水の浄化等の処理を行うようにしても良い。Further, in the above embodiment, the ejector 8 is used.
Although the configuration in which the filter tube 16 also used for water absorption and air supply is combined is shown, the treatment such as purification of contaminated water may be performed without using the ejector 8.

【０１１４】[0114]

【発明の効果】以上のように、本発明の土壌洗浄方法及
び土壌洗浄装置によれば、複数の土砂分離槽を用いて土
砂を分級するが、分級処理を行う前工程で、土砂をエジ
ェクターで洗浄するように構成されているので、油，タ
ール，重金属汚染等、汚染物質の種類に拘わらず、また
従来の洗浄技術では比較的困難であった透水性の低いシ
ルト粘土等の、微細な土粒子についても、確実に洗浄す
ることが可能となる。As described above, according to the soil cleaning method and the soil cleaning apparatus of the present invention, the earth and sand are classified by using a plurality of earth and sand separating tanks, but the earth and sand are ejected by the ejector in the step before the classification treatment. Since it is configured to be washed, it does not matter what kind of pollutants such as oil, tar, heavy metal contamination, etc., and fine soil such as silt clay with low water permeability, which was relatively difficult with conventional washing techniques. It is possible to reliably wash the particles.

【０１１５】さらに、エジェクターによる流送過程で土
砂の洗浄を行うので、従来の回転ドラム内にて土壌洗浄
する構成等に比して、広いスペースを要することなく土
壌洗浄を行うことが可能となる。また、各土砂分離槽に
吸水送気兼用フィルター管を配設し、槽内の水を槽外へ
流出させることにより、土砂分離槽を広い面積としなく
ても土砂分離槽への流入量を確保することができる。こ
のようにして、土砂分離槽に土粒子や汚染物質を含む汚
染水を次々に流入させ、この汚染水を吸水送気兼用フィ
ルター管で吸水するときにフィルターにより微細な土粒
子を取り分けて沈降させ、効率的に浄化処理を行うこと
が可能となる。Further, since the earth and sand are washed in the process of sending by the ejector, the soil can be washed without requiring a large space as compared with the conventional construction in which the soil is washed in the rotating drum. . In addition, a filter tube that also serves as a suction and air supply is installed in each sediment separation tank, and the water in the tank flows out to the outside of the tank, so that the amount of inflow to the sediment separation tank is secured without making the sediment separation tank a large area. can do. In this way, contaminated water containing soil particles and pollutants is successively flown into the sediment separation tank, and when this contaminated water is absorbed by the filter tube that also serves as a water absorption and air supply filter, fine soil particles are separated and settled. Therefore, it becomes possible to perform the purification process efficiently.

【０１１６】このため、狭隘な工場敷地内やガソリンス
タンドのように、限られたスペースを有効利用した洗浄
処理を行うことが可能となる。このように、本発明の土
壌洗浄装置によれば、広いスペースを要することなく土
壌洗浄を行うことができるので、汚染土壌の発生地が狭
い場所であっても、土壌浄化処理を現地で行うことがで
き、土壌運搬等に要されるエネルギー消費を抑制し、省
エネルギー化を実現することが可能となる。For this reason, it becomes possible to perform the cleaning process effectively utilizing the limited space such as in a narrow factory premises or a gas station. As described above, according to the soil cleaning apparatus of the present invention, it is possible to perform soil cleaning without requiring a large space. Therefore, even if the place where the contaminated soil is generated is a narrow place, the soil cleaning treatment can be performed locally. Therefore, it is possible to suppress energy consumption required for transportation of soil and realize energy saving.

【０１１７】また、吸水送気兼用フィルター管は、送気
が可能であるため、土砂分離槽内に微細気泡を発生させ
て、フィルターの目詰まりを解消することが可能であ
る。さらに、吸水送気兼用フィルター管による微細気泡
により、土砂分離槽内の貯留水に含まれる汚染物質を浮
上させることができ、汚染物質を確実に分離させること
が可能となる。[0117] Further, since the filter tube that also serves as the water supply and air supply is capable of air supply, it is possible to eliminate the clogging of the filter by generating fine bubbles in the sediment separating tank. Further, by the fine bubbles formed by the filter tube that also serves as the water supply and air supply, the pollutants contained in the stored water in the sediment separating tank can be floated, and the pollutants can be reliably separated.

【０１１８】また、土砂の分級は原則として沈殿による
ため、高価な水処理設備を極力排除することができる。
さらに、一連の工程で洗浄に使用した水を、砂濾過槽で
浄化してから給水槽に移送し、各工程に循環供給して再
利用するようにしているので、場外汚染を排除し、また
水の使用量を必要最小限にし、さらに環境保全に配慮し
つつ、コストの増加を防ぐことが可能となる。[0118] Further, since the classification of the sediment is based on sedimentation in principle, expensive water treatment equipment can be eliminated as much as possible.
In addition, the water used for washing in a series of steps is purified in a sand filter tank before being transferred to a water tank, and is circulated and supplied to each step for reuse, eliminating external pollution, and It is possible to minimize the amount of water used and to prevent an increase in costs while considering environmental protection.

【０１１９】さらに、エジェクターにより土粒子等のＳ
Ｓ成分が流送過程で単粒子化されるので、排土の脱水工
程を大幅に短縮することができる。また、土砂分離槽に
おいて土砂が粒径別に分級して堆積されるので、土砂分
離槽から土砂を排出したとき、粒径の揃った状態で排出
土砂を得ることができる。このため、排出後に行うシャ
ワーリング，脱水処理，埋め戻しなどの後処理を効率的
に行うことが可能となる。[0119] Further, the ejector is used to remove S such as soil particles.
Since the S component is made into single particles in the process of sending, it is possible to greatly shorten the dehydration process of soil discharge. Further, since the sediment is classified and deposited according to the particle size in the sediment separating tank, when the sediment is discharged from the sediment separating tank, the discharged sediment can be obtained in a state where the particle diameter is uniform. Therefore, it is possible to efficiently perform post-treatments such as showering, dehydration treatment, backfilling performed after discharge.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の土壌洗浄装置の全体を示す概略図であ
る。FIG. 1 is a schematic view showing the entire soil cleaning apparatus of the present invention.

【図２】エジェクターの説明図である。FIG. 2 is an explanatory diagram of an ejector.

【図３】エアージャッキの説明図である。FIG. 3 is an explanatory diagram of an air jack.

【図４】再洗浄槽から油分等の汚染物質をオーバーフロ
ーさせた状態を示す説明図である。FIG. 4 is an explanatory diagram showing a state in which contaminants such as oil have overflowed from the recleaning tank.

【図５】土砂分離槽から土砂を排出した状態を示す説明
図である。FIG. 5 is an explanatory diagram showing a state in which earth and sand are discharged from the earth and sand separation tank.

【図６】土砂分離槽に吸水管を設けた構成を示す説明図
である。FIG. 6 is an explanatory diagram showing a configuration in which a water absorption pipe is provided in the earth and sand separation tank.

【図７】吸水送気兼用フィルター管の取水送気部を示す
説明図である。FIG. 7 is an explanatory diagram showing a water intake / air supply section of a filter tube that also serves as water absorption / air supply.

【図８】吸水送気兼用フィルター管の取水口を示す拡大
説明図である。FIG. 8 is an enlarged explanatory view showing a water intake port of a filter tube that also serves as a suction / water supply filter.

【図９】吸水送気兼用フィルター管による吸水状態及び
空気導入状態を示す説明図である。FIG. 9 is an explanatory diagram showing a water absorption state and an air introduction state by a filter tube that also serves as a water absorption / air supply.

【図１０】土壌洗浄方法の工程を示すブロック図であ
る。FIG. 10 is a block diagram showing steps of a soil cleaning method.

【符号の説明】[Explanation of symbols]

１ スラリー槽 ２ 再洗浄槽 ３ 第１の土砂分離槽 ３ａ 粗粒土 ４ 第２の土砂分離槽 ４ａ 細粒土 ５ 第３の土砂分離槽 ５ａ 微細粒土 ６ 砂濾過槽 ７ 給水槽 ８ エジェクター ９ 通水管 ９ａ フィルター １０ エアージャッキ １１ ホイールローダー １２ 汚染土 １３ 汚染物質 １４ 土砂排出口 １５ 水処理装置 １６ 吸水送気兼用フィルター管 １７ 脱水装置 １８ 土砂受けトレイ Ｓ 土壌洗浄装置 1 slurry tank 2 re-cleaning tank 3 First sediment separation tank 3a coarse-grained soil 4 Second Sediment Separation Tank 4a Fine soil 5 Third sediment separation tank 5a Fine grain soil 6 sand filter tank 7 water tank 8 ejectors 9 water pipe 9a filter 10 air jack 11 wheel loader 12 contaminated soil 13 pollutants 14 Sediment discharge port 15 Water treatment equipment 16 Water absorption and air supply filter tube 17 Dehydrator 18 earth and sand tray S soil cleaning device

【手続補正書】[Procedure amendment]

【提出日】平成１５年６月１０日（２００３．６．１
０）[Submission Date] June 10, 2003 (2003.6.1)
0)

【手続補正１】[Procedure Amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】請求項６[Name of item to be corrected] Claim 6

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【手続補正２】[Procedure Amendment 2]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】００３６[Correction target item name] 0036

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【００３６】スラリー槽１には、敷地内で油圧ショベル
等により掘削され、ホイールローダー１１により運搬さ
れた汚染土１２が投入され、給水槽７から循環されてき
た洗浄水７ａが適量加えられる。スラリー槽１に汚染土
１２を投入する際には、スラリー槽１の後段で汚染土１
２を洗浄するエジェクター８の管径を考慮して、所定粒
径以上の礫，ガラが投入されないようにする。In the slurry tank 1, the polluted soil 12 excavated on the site by a hydraulic excavator or the like and transported by the wheel loader 11 is put, and an appropriate amount of cleaning water 7a circulated from the water supply tank 7 is introduced. Added. When the contaminated soil 12 is put into the slurry tank 1, the contaminated soil 1 is provided in the latter stage of the slurry tank 1.
Considering the pipe diameter of the ejector 8 for cleaning 2, the gravel and the debris having a predetermined particle size or more are prevented from being introduced.

【手続補正３】[Procedure 3]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】図１[Name of item to be corrected] Figure 1

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【図１】 [Figure 1]

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ０３Ｂ 5/28 Ｂ０３Ｂ 9/06 ４Ｄ０７１ 7/00 Ｃ０２Ｆ 1/24 Ｃ 9/06 1/40 Ｚ Ｂ０９Ｃ 1/04 ＺＡＢ Ｂ０９Ｂ 3/00 ３０４Ｋ 1/08 5/00 ＺＡＢＳ Ｃ０２Ｆ 1/24 Ｂ０１Ｄ 23/16 1/40 Ｆターム(参考） 4D004 AA41 AB02 AB03 AB06 AC05 AC07 BA02 BA10 CA10 CA13 CA40 CB43 CB45 CC03 4D037 AA11 AB06 AB08 AB14 AB16 BA03 BA05 BB05 CA02 CA06 CA08 CA14 4D041 BA01 BB04 BD16 CA01 CA07 4D051 BA01 BA07 4D066 AA01 AB06 4D071 AA02 AB03 AB04 AB13 AB23 AB32 AB42 AB61 CA05 DA03─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) B03B 5/28 B03B 9/06 4D071 7/00 C02F 1/24 C 9/06 1/40 Z B09C 1 / 04 ZAB B09B 3/00 304K 1/08 5/00 ZABS C02F 1/24 B01D 23/16 1/40 F term (reference) 4D004 AA41 AB02 AB03 AB06 AC05 AC07 BA02 BA10 CA10 CA13 CA40 CB43 CB45 CC03 4D037 AA11 AB06 AB08 AB14 AB16 BA03 BA05 BB05 CA02 CA06 CA08 CA14 4D041 BA01 BB04 BD16 CA01 CA07 4D051 BA01 BA07 4D066 AA01 AB06 4D071 AA02 AB03 AB04 AB13 AB23 AB32 AB42 AB61 CA05 DA03

Claims (16)

【特許請求の範囲】[Claims] 【請求項１】 汚染土砂を洗浄するエジェクターと、洗
浄された土砂を粒径別に分級する複数の土砂分離槽と、
該土砂分離槽の貯留水を濾過する砂濾過槽と、該砂濾過
槽からの濾過水を受け入れる給水槽と、を少なくとも用
いて土壌の洗浄を行う方法であって、 前記土砂分離槽に土砂を移送する前に前記エジェクター
により汚染土砂を洗浄する処理と、該洗浄された土砂を
土砂分離槽にて沈殿させ粒径別に分級する処理と、前記
土砂分離槽の貯留水をフィルターを備えた管で吸水する
処理と、前記管より微細気泡を発生させて前記フィルタ
ーの目詰まりを解消するとともに、前記貯留水に含まれ
る汚染物質を分離させる処理と、前記貯留水を前記砂濾
過槽にて濾過する処理と、該砂濾過槽からの濾過水を給
水槽で受け入れて洗浄水として再利用する処理と、前記
土砂分離槽に沈殿した土砂を排出する処理と、を備えた
ことを特徴とする土壌洗浄方法。1. An ejector for cleaning contaminated earth and sand, and a plurality of earth and sand separation tanks for classifying the washed earth and sand by particle size.
A method for cleaning soil using at least a sand filtration tank for filtering stored water in the sediment separation tank, and a water supply tank for receiving filtered water from the sand filtration tank, wherein the sediment separation tank is filled with soil. Before the transfer, the contaminated earth and sand are washed by the ejector, the washed earth and sand are precipitated in a sediment separation tank and classified according to particle size, and the water stored in the sediment separation tank is piped with a filter. A process of absorbing water, a process of generating fine bubbles from the tube to eliminate clogging of the filter, a process of separating contaminants contained in the stored water, and a process of filtering the stored water in the sand filter tank. Soil cleaning comprising: a treatment, a treatment of receiving filtered water from the sand filtration tank in a water supply tank and reusing it as cleaning water, and a treatment of discharging sediment deposited in the sediment separation tank. Method. 【請求項２】 前記洗浄された土砂を土砂分離槽にて沈
殿させ粒径別に分級する処理の前に、前記汚染土砂を再
洗浄槽に移送し、前記汚染土砂から汚染物質を分離させ
る処理を行うことを特徴とする請求項１記載の土壌洗浄
方法。2. A process of transferring the contaminated sediment to a re-cleaning tank to separate contaminants from the contaminated sediment before the treatment of precipitating the washed sediment in a sediment separating tank and classifying the contaminated sediment by particle size. The soil cleaning method according to claim 1, which is performed. 【請求項３】 前記再洗浄槽または土砂分離槽にはエジ
ェクターを介して土砂が移送されることを特徴とする請
求項２記載の土壌洗浄方法。3. The soil cleaning method according to claim 2, wherein the soil is transferred to the recleaning tank or the sediment separating tank through an ejector. 【請求項４】 採取された汚染土砂をエジェクターによ
り洗浄する処理と、洗浄された土砂を第１の土砂分離槽
へ移送して粗粒土を分級する処理と、前記第１の土砂分
離槽の貯留水を吸水送気兼用フィルター管で吸水する処
理と、前記吸水送気兼用フィルター管より微細気泡を発
生させて前記フィルターの目詰まりを解消するととも
に、前記貯留水に含まれる汚染物質を分離させる処理
と、洗浄された土砂を第２の土砂分離槽へ移送して細粒
土を分級する処理と、前記第２の土砂分離槽の貯留水を
吸水送気兼用フィルター管で吸水する処理と、前記吸水
送気兼用フィルター管より微細気泡を発生させて前記フ
ィルターの目詰まりを解消するとともに、前記貯留水に
含まれる汚染物質を分離させる処理と、洗浄された土砂
を第３の土砂分離槽へ移送して微細粒土を分級する処理
と、前記第３の土砂分離槽の貯留水を吸水送気兼用フィ
ルター管で吸水する処理と、前記吸水送気兼用フィルタ
ー管より微細気泡を発生させて前記フィルターの目詰ま
りを解消するとともに、前記貯留水に含まれる汚染物質
を分離させる処理と、前記第１の土砂分離槽，第２の土
砂分離槽，第３の土砂分離槽の貯留水を砂濾過槽に移送
して濾過する処理と、濾過水を給水槽に移送し洗浄水と
して再利用する処理と、各土砂分離槽に沈殿した土砂を
排出する処理と、を備えたことを特徴とする土壌洗浄方
法。4. A process of washing the collected contaminated soil with an ejector, a process of transferring the washed soil to a first sediment separating tank to classify coarse soil, and a treatment of the first sediment separating tank. A process of absorbing the stored water with a filter tube that also serves as a suction and air supply, and clears the clogging of the filter by generating fine bubbles from the filter tube that also serves as a suction and air supply, and separates contaminants contained in the stored water. A treatment, a treatment in which the washed sediment is transferred to a second sediment separation tank to classify fine-grained soil, and a treatment in which the stored water in the second sediment separation tank is absorbed by a filter tube that also serves as a water supply and air supply filter, A process for generating fine air bubbles from the filter tube that also serves as a suction and air supply to eliminate clogging of the filter and to separate contaminants contained in the stored water, and the washed sediment to the third sediment separation tank. Transfer A process of sending and classifying fine grained soil, a process of absorbing the stored water of the third earth and sand separation tank with a filter tube for both suction and air supply, and generating fine bubbles from the filter tube for both suction and air supply A process of removing clogging of the filter and separating pollutants contained in the stored water, and sand-filtering the stored water of the first sediment-separation tank, the second sediment-separation tank, and the third sediment-separation tank Soil characterized by having a process of transferring to a tank and filtering, a process of transferring filtered water to a water supply tank for reuse as wash water, and a process of discharging sediment deposited in each sediment separation tank Cleaning method. 【請求項５】 前記洗浄された土砂を第１の土砂分離槽
へ移送して粗粒土を分級する処理の前に、前記汚染土砂
をエジェクターを介して再洗浄槽に移送し、前記汚染土
砂から汚染物質を分離させる処理を行うことを特徴とす
る請求項３記載の土壌洗浄方法。5. The contaminated earth and sand is transferred to a re-cleaning tank via an ejector before the treatment of transferring the washed earth and sand to the first earth and sand separating tank to classify coarse-grained soil, The soil cleaning method according to claim 3, wherein a treatment for separating pollutants from the soil is performed. 【請求項６】 前記再洗浄槽または土砂分離槽での分離
処理がなされた後で、前記再洗浄槽または土砂分離槽の
汚染浮上物質をオーバーフローさせる処理がなされるこ
とを特徴とする請求項１または３記載の土壌洗浄装置。6. The process for overflowing contaminated floating substances in the recleaning tank or the sediment separating tank after the separation processing in the recleaning tank or the sediment separating tank is performed. Or the soil cleaning device according to 3. 【請求項７】 前記再洗浄槽での分離処理がなされた後
で、前記再洗浄槽の貯留水を砂濾過槽に移送して濾過す
る処理がなされることを特徴とする請求項２，３，５，
６いずれか記載の土壌洗浄方法。7. The process of transferring the stored water in the recleaning tank to a sand filter tank and filtering the water after the separation processing in the recleaning tank is performed. , 5,
6. The soil cleaning method according to any one of 6 above. 【請求項８】 前記再洗浄槽での分離処理がなされた後
で、前記再洗浄槽に圧縮空気にて微細気泡を発生させて
汚染物質を浮上させる処理がなされることを特徴とする
請求項２，３，５，６いずれか記載の土壌洗浄方法。8. The process of generating fine bubbles in the re-cleaning tank by using compressed air to levitate contaminants after the separation processing in the re-cleaning tank is performed. The soil cleaning method according to any one of 2, 3, 5, and 6. 【請求項９】 前記排出された土砂を脱水して埋め戻す
処理では、前記土砂分離槽から排出された土砂が粒径別
に処理されることを特徴とする請求項１または３記載の
土壌洗浄方法。9. The soil cleaning method according to claim 1, wherein in the process of dehydrating and backfilling the discharged sediment, the sediment discharged from the sediment separation tank is treated according to a particle size. . 【請求項１０】 スラリー化された汚染土砂が収納され
たスラリー槽と、 汚染土砂を粒径別に沈殿させる複数の土砂分離槽と、 前記スラリー槽と土砂分離槽との間に介在するエジェク
ターと、 前記複数の土砂分離槽を連結する通水管と、 前記複数の土砂分離槽に配設される吸水送気兼用フィル
ター管と、 前記複数の土砂分離槽の貯留水を濾過する砂濾過槽と、 該砂濾過槽で濾過された水を洗浄水として循環させる給
水槽と、を備え、 前記吸水送気兼用フィルター管により、前記土砂分離槽
内の貯留水が直接吸水されて前記砂濾過槽へ移送され、 前記吸水送気兼用フィルター管より気泡が発生されてフ
ィルターの目詰まりが解消されるとともに前記土砂分離
槽内の汚染物質が分離されることを特徴とする土壌洗浄
装置。10. A slurry tank in which the contaminated earth and sand made into a slurry is stored, a plurality of earth and sand separation tanks for precipitating the contaminated earth and sand by particle size, and an ejector interposed between the slurry tank and the earth and sand separation tank. A water passage pipe connecting the plurality of sediment-separation tanks, a filter tube that also serves as a suction and air supply disposed in the plurality of sediment-separation tanks, and a sand filtration tank that filters water stored in the plurality of sediment-separation tanks, A water supply tank that circulates the water filtered in the sand filtration tank as wash water, and the stored water in the sediment separation tank is directly absorbed by the water absorption and air supply filter pipe and transferred to the sand filtration tank. A soil cleaning apparatus, characterized in that air bubbles are generated from the filter tube that also serves as water absorption and air supply to eliminate clogging of the filter and to separate contaminants in the sediment separating tank. 【請求項１１】 前記吸水送気兼用フィルター管にはポ
ンプ及びコンプレッサーが接続されたことを特徴とする
請求項１０記載の土壌洗浄装置。11. The soil cleaning apparatus according to claim 10, wherein a pump and a compressor are connected to the filter tube that also serves as the water intake and air supply. 【請求項１２】 前記スラリー槽と土砂分離槽との間に
は、前記汚染土砂から汚染物質を分離する再洗浄槽が設
けられたことを特徴とする請求項１０記載の土壌洗浄装
置。12. The soil cleaning apparatus according to claim 10, wherein a recleaning tank for separating pollutants from the contaminated sediment is provided between the slurry tank and the sediment separating tank. 【請求項１３】 前記スラリー槽と前記再洗浄槽との
間、または前記再洗浄槽と前記土砂分離槽との間、また
は前記複数の土砂分離槽間にはエジェクターが設けられ
たことを特徴とする請求項１２記載の土壌洗浄装置。13. An ejector is provided between the slurry tank and the re-cleaning tank, between the re-cleaning tank and the sediment separating tank, or between the plurality of sediment separating tanks. The soil cleaning device according to claim 12. 【請求項１４】 前記土砂分離槽または前記再洗浄槽に
は、前記土砂分離槽または再洗浄槽を所定角度で傾斜可
能なエアージャッキが配設されていることを特徴とする
請求項１０または１２記載の土壌洗浄装置。14. The air jack capable of inclining the sediment separation tank or the recleaning tank at a predetermined angle is arranged in the sediment separation tank or the recleaning tank. The soil cleaning device described. 【請求項１５】 前記土砂分離槽の下部には、土砂排出
用の開口と、該開口を密閉可能な蓋部材が設けられたこ
とを特徴とする請求項１０または１４記載の土壌洗浄装
置。15. The soil cleaning apparatus according to claim 10, wherein an opening for discharging sediment and a lid member capable of sealing the opening are provided in a lower portion of the sediment separating tank. 【請求項１６】 水槽に配設される取水送気兼用装置で
あって、 ポンプ及びコンプレッサーに接続された切替装置と、該
切替装置に接続された管部と、該管部に接続された取水
送気部と、該取水送気部に取着されたフィルターと、を
有する取水送気兼用フィルター管を備え、 該取水送気兼用フィルター管を配設することにより所定
の取水量を確保し、 前記ポンプの駆動により前記水槽内の水が前記フィルタ
ーを介して吸水されるとともに、前記コンプレッサーの
駆動により前記取水送気部から前記フィルターを介して
微細気泡が発生されることを特徴とする取水送気兼用装
置。16. A combined intake and air supply device arranged in a water tank, comprising a switching device connected to a pump and a compressor, a pipe portion connected to the switching device, and intake water connected to the pipe portion. An intake / air supply filter tube having an air supply unit and a filter attached to the intake / air supply unit is provided, and a predetermined intake amount is secured by disposing the intake / air supply / filter pipe. The water in the water tank is absorbed through the filter by driving the pump, and fine bubbles are generated from the intake air feeding unit through the filter by driving the compressor. Dual-purpose device.
JP2002140611A 2002-05-15 2002-05-15 Method and apparatus for soil washing, and water suction-air supply apparatus Pending JP2003334533A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publication Number Publication Date
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ID=29701451

Family Applications (1)

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JP2006281080A (en) * 2005-03-31 2006-10-19 Sumitomo Osaka Cement Co Ltd Processing method of contaminated soil
JP2007175585A (en) * 2005-12-27 2007-07-12 Tokuyama Corp Treatment method of contaminated soil
JP2007237133A (en) * 2006-03-10 2007-09-20 Ohbayashi Corp Original position washing method of soil polluted with organic compound
JP2007237132A (en) * 2006-03-10 2007-09-20 Ohbayashi Corp Original position washing method of soil polluted with organic compound
JP2007268522A (en) * 2006-03-10 2007-10-18 Hamada:Kk Washing apparatus
JP2010284624A (en) * 2009-06-15 2010-12-24 Dojo Kankyo Process Kenkyusho:Kk Apparatus of producing mixture of soil and water using high pressure water
JP2012239937A (en) * 2011-05-16 2012-12-10 Daiwa House Industry Co Ltd System for processing contaminated soil and method for processing contaminated soil
JP2015073987A (en) * 2013-10-04 2015-04-20 コリア インスティチュート オブ ジオサイエンス アンド ミネラル リソースズ Simplified valuable mineral sorting apparatus and method of sorting valuable mineral using the same
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CN111167846A (en) * 2020-01-19 2020-05-19 北京建工环境修复股份有限公司 Soil leaching restoration and reduction system and construction method thereof
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006281080A (en) * 2005-03-31 2006-10-19 Sumitomo Osaka Cement Co Ltd Processing method of contaminated soil
JP2007175585A (en) * 2005-12-27 2007-07-12 Tokuyama Corp Treatment method of contaminated soil
JP2007237133A (en) * 2006-03-10 2007-09-20 Ohbayashi Corp Original position washing method of soil polluted with organic compound
JP2007237132A (en) * 2006-03-10 2007-09-20 Ohbayashi Corp Original position washing method of soil polluted with organic compound
JP2007268522A (en) * 2006-03-10 2007-10-18 Hamada:Kk Washing apparatus
JP2010284624A (en) * 2009-06-15 2010-12-24 Dojo Kankyo Process Kenkyusho:Kk Apparatus of producing mixture of soil and water using high pressure water
JP2012239937A (en) * 2011-05-16 2012-12-10 Daiwa House Industry Co Ltd System for processing contaminated soil and method for processing contaminated soil
JP2015073987A (en) * 2013-10-04 2015-04-20 コリア インスティチュート オブ ジオサイエンス アンド ミネラル リソースズ Simplified valuable mineral sorting apparatus and method of sorting valuable mineral using the same
CN105478466A (en) * 2016-01-15 2016-04-13 大连德联投资控股有限公司 Vehicle-mounted integrated soil washing and restoring device
CN111167846A (en) * 2020-01-19 2020-05-19 北京建工环境修复股份有限公司 Soil leaching restoration and reduction system and construction method thereof
CN117816352A (en) * 2024-01-04 2024-04-05 江门闽晖新型建材有限公司 Ferris wheel sand washer for building engineering
CN117816352B (en) * 2024-01-04 2024-05-28 江门闽晖新型建材有限公司 Ferris wheel sand washer for building engineering

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