JP2010227733A - Method and system for cleaning contaminated soil in situ - Google Patents

Method and system for cleaning contaminated soil in situ Download PDF

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JP2010227733A
JP2010227733A JP2009074987A JP2009074987A JP2010227733A JP 2010227733 A JP2010227733 A JP 2010227733A JP 2009074987 A JP2009074987 A JP 2009074987A JP 2009074987 A JP2009074987 A JP 2009074987A JP 2010227733 A JP2010227733 A JP 2010227733A
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contaminated soil
pipe
contaminated
situ purification
air injection
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Hiroshi Kubo
博 久保
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Obayashi Corp
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Obayashi Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/20—Waste processing or separation

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a system excellent in thermal efficiency for cleaning contaminated soil in situ capable of sufficiently removing VOC from a wide area of contaminated soil. <P>SOLUTION: The system 100 for cleaning contaminated soil in situ including an air ejection pipe 1 disposed in contaminated soil with a heater 10 attached to an air ejection port thereof, and a gas recovery pipe 2 and a horizontal heater band 3 each disposed on the ground surface side of the contaminated soil, is constructed in such a manner that VOC is separated from the contaminated soil by ejecting heated air from the air ejection pipe 1 into the contaminated soil, and the separated VOC is recovered by the gas recovery pipe 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、汚染土壌の原位置浄化方法及び汚染土壌の原位置浄化システムに関する。   The present invention relates to an in-situ purification method for contaminated soil and an in-situ purification system for contaminated soil.

従来より、揮発性有機化合物（volatile organic compounds；以下「ＶＯＣ」という。）で汚染された汚染土壌を浄化する技術として、当該汚染土壌を原位置で浄化する技術が知られている（特許文献１，２参照）。   Conventionally, as a technique for purifying contaminated soil contaminated with volatile organic compounds (hereinafter referred to as “VOC”), a technique for purifying the contaminated soil in situ is known (Patent Document 1). , 2).

例えば、特許文献１には、配管を用いて、ＶＯＣで汚染された汚染土壌に高圧蒸気を供給し、この高圧蒸気によって当該汚染土壌からＶＯＣを除去することにより、汚染土壌を原位置で浄化するという発明が開示されている。   For example, Patent Document 1 uses a pipe to supply high-pressure steam to contaminated soil contaminated with VOC, and removes VOC from the contaminated soil with this high-pressure steam, thereby purifying the contaminated soil in situ. The invention is disclosed.

また、特許文献２には、ＶＯＣで汚染された汚染土壌中に発熱体を設置するとともに、発熱体の上方の土壌中に汚染物質捕捉体を設置し、その発熱体を発熱させて周囲の土壌を加熱し、土壌からＶＯＣを分離させて、土壌中を移動してきたＶＯＣを汚染物質捕捉体に捕捉させることにより、汚染土壌を原位置で浄化するという発明が開示されている。   Further, in Patent Document 2, a heating element is installed in contaminated soil contaminated with VOC, a pollutant capturing body is installed in the soil above the heating element, and the heating element is heated so that the surrounding soil is heated. , The VOC is separated from the soil, and the pollutant trapping body captures the VOC that has moved through the soil, thereby purifying the contaminated soil in situ.

特表平４−５０１２３１号公報Japanese National Patent Publication No. 4-501231 特開２００２−１１９９５３号公報Japanese Patent Laid-Open No. 2002-119953

しかしながら、従来の技術にあっては、熱効率が良くないという問題がある。また、浄化対象となる汚染土壌の範囲が狭く、浄化対象となる汚染土壌からＶＯＣを十分に除去することができないという問題もある。   However, the conventional technique has a problem that the thermal efficiency is not good. There is also a problem that the range of contaminated soil to be purified is narrow and VOC cannot be sufficiently removed from the contaminated soil to be purified.

すなわち、特許文献１に開示された発明の如く、配管を用いて、汚染土壌に高圧蒸気を供給する場合には、例えば、配管に破裂などの不具合が生じると、当該配管から高圧蒸気が漏れてしまうことが懸念される。そのため、日本のように国土が狭く人工密集地で施工を行うときには、安全対策上の制約があり、当該発明を実施することは困難である。また、配管を用いて、汚染土壌に高圧蒸気を供給する場合には、配管による熱ロスが避けられないことから、特許文献１に開示された発明では、土中加熱の方法としては熱効率が良くないという問題がある。   That is, as in the invention disclosed in Patent Document 1, when high-pressure steam is supplied to contaminated soil using a pipe, for example, when a fault such as a rupture occurs in the pipe, the high-pressure steam leaks from the pipe. There is a concern that For this reason, when construction is carried out in an artificially dense place where the land is small like Japan, there are restrictions on safety measures, and it is difficult to implement the invention. In addition, when high pressure steam is supplied to contaminated soil using piping, heat loss due to piping is inevitable. Therefore, in the invention disclosed in Patent Document 1, thermal efficiency is good as a method for heating in the soil. There is no problem.

また、特許文献２に開示された発明の如く、ＶＯＣで汚染された汚染土壌中に発熱体を設置するとともに、発熱体の上方の土壌中に汚染物質捕捉体を設置するだけでは、浄化対象となる汚染土壌の範囲が狭く、しかも、浄化対象となる汚染土壌からＶＯＣを十分に除去することができないという問題がある。   In addition, as in the invention disclosed in Patent Document 2, when a heating element is installed in contaminated soil contaminated with VOC and a contaminant trapping body is installed in the soil above the heating element, There is a problem that the range of the contaminated soil is narrow and VOC cannot be sufficiently removed from the contaminated soil to be purified.

本発明は、このような従来の技術の問題に鑑みてなされたものであり、熱効率に優れており、広範囲の汚染土壌からＶＯＣを十分に除去することが可能な汚染土壌の原位置浄化方法及び汚染土壌の原位置浄化システムを提供することを目的とする。   The present invention has been made in view of such problems of the conventional technology, has excellent thermal efficiency, and is capable of sufficiently removing VOC from a wide range of contaminated soil. An object is to provide an in-situ purification system for contaminated soil.

上記課題を解決するために、本発明は、揮発性有機化合物で汚染された汚染土壌を原位置で浄化するための汚染土壌の原位置浄化方法であって、前記汚染土壌中に、エア噴射口に加熱体が設けられたエア噴射管を配設するとともに、当該汚染土壌中の地表側にガス回収管を配設し、前記エア噴射管によって前記汚染土壌へ加熱されたエアを噴射することにより、前記汚染土壌から前記揮発性有機化合物を分離させ、分離した前記揮発性有機化合物を前記ガス回収管によって回収することを特徴とする。   In order to solve the above-mentioned problems, the present invention provides an in-situ purification method for contaminated soil for purifying contaminated soil contaminated with a volatile organic compound in-situ. An air injection pipe provided with a heating body is provided, a gas recovery pipe is provided on the ground surface side in the contaminated soil, and heated air is injected into the contaminated soil by the air injection pipe. The volatile organic compound is separated from the contaminated soil, and the separated volatile organic compound is recovered by the gas recovery pipe.

また、本発明は、揮発性有機化合物で汚染された汚染土壌を原位置で浄化するための汚染土壌の原位置浄化方法であって、前記汚染土壌中にエア噴射管を配設するとともに、当該エア噴射管の周囲に加熱帯を配設する一方で、当該汚染土壌中の地表側にガス回収管を配設し、前記エア噴射管によって前記汚染土壌へエアを噴射することにより、前記加熱帯によって加熱された前記汚染土壌から前記揮発性有機化合物を分離させ、分離した前記揮発性有機化合物を前記ガス回収管によって回収することを特徴とする。   Further, the present invention is an in-situ purification method for contaminated soil for purifying contaminated soil contaminated with a volatile organic compound in situ, wherein an air jet pipe is disposed in the contaminated soil, and While disposing a heating zone around the air injection tube, disposing a gas recovery tube on the ground surface side in the contaminated soil, and injecting air to the contaminated soil through the air injection tube, the heating zone The volatile organic compound is separated from the contaminated soil heated by the gas, and the separated volatile organic compound is recovered by the gas recovery pipe.

また、本発明は、揮発性有機化合物で汚染された汚染土壌を原位置で浄化するための汚染土壌の原位置浄化方法であって、前記汚染土壌中に、エア噴射口に加熱体が設けられたエア噴射管を配設するとともに、当該エア噴射管の周囲に加熱帯を配設する一方で、当該汚染土壌中の地表側にガス回収管を配設し、前記エア噴射管によって前記汚染土壌へ加熱されたエアを噴射することにより、前記加熱帯によって加熱された前記汚染土壌から前記揮発性有機化合物を分離させ、分離した前記揮発性有機化合物を前記ガス回収管によって回収することを特徴とする。   The present invention also provides an in-situ purification method for contaminated soil for purifying contaminated soil contaminated with a volatile organic compound in-situ, wherein a heating body is provided at an air injection port in the contaminated soil. In addition to disposing an air injection pipe, a heating zone is disposed around the air injection pipe, while a gas recovery pipe is disposed on the ground surface side in the contaminated soil, and the contaminated soil is disposed by the air injection pipe. The volatile organic compound is separated from the contaminated soil heated by the heating zone by spraying heated air to the heated zone, and the separated volatile organic compound is recovered by the gas recovery pipe. To do.

また、本発明は、揮発性有機化合物で汚染された汚染土壌を原位置で浄化するための汚染土壌の原位置浄化システムであって、前記汚染土壌中に配設されたエア噴射管と、前記エア噴射管のエア噴射口に設けられた加熱体と、前記汚染土壌中の地表側に配設されたガス回収管と、を有することを特徴とする。   Further, the present invention is an in-situ purification system for contaminated soil for purifying in-situ contaminated soil contaminated with volatile organic compounds, the air jet pipe disposed in the contaminated soil, It has the heating body provided in the air injection port of the air injection pipe, and the gas recovery pipe arrange | positioned by the ground surface side in the said contaminated soil.

また、本発明は、揮発性有機化合物で汚染された汚染土壌を原位置で浄化するための汚染土壌の原位置浄化システムであって、前記汚染土壌中に配設されたエア噴射管と、前記汚染土壌中のうち前記エア噴射管の周囲に配設された加熱帯と、前記汚染土壌中の地表側に配設されたガス回収管と、を有することを特徴とする。   The present invention also provides an in-situ purification system for contaminated soil for purifying contaminated soil contaminated with volatile organic compounds in-situ, and an air jet pipe disposed in the contaminated soil; It has the heating zone arrange | positioned around the said air injection pipe among contaminated soil, and the gas recovery pipe arrange | positioned at the surface side in the said contaminated soil.

また、本発明は、揮発性有機化合物で汚染された汚染土壌を原位置で浄化するための汚染土壌の原位置浄化システムであって、前記汚染土壌中に配設されたエア噴射管と、前記エア噴射管のエア噴射口に設けられた加熱体と、前記汚染土壌中のうち前記エア噴射管の周囲に配設された加熱帯と、前記汚染土壌中の地表側に配設されたガス回収管と、を有することを特徴とする。   The present invention also provides an in-situ purification system for contaminated soil for purifying contaminated soil contaminated with volatile organic compounds in-situ, and an air jet pipe disposed in the contaminated soil; A heating element provided at an air injection port of the air injection pipe, a heating zone provided around the air injection pipe in the contaminated soil, and a gas recovery provided on the surface side in the contaminated soil And a tube.

本発明によれば、熱効率に優れており、広範囲の汚染土壌からＶＯＣを十分に除去することが可能な汚染土壌の原位置浄化方法及び汚染土壌の原位置浄化システムを提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, it is excellent in thermal efficiency and can provide the in-situ purification method and in-situ purification system of contaminated soil which can fully remove VOC from a wide range of contaminated soil.

本発明の第１実施形態に係る汚染土壌の原位置浄化システム１００を示す概略図である。It is the schematic which shows the in-situ purification system 100 of the contaminated soil which concerns on 1st Embodiment of this invention. 本発明の第２実施形態に係る汚染土壌の原位置浄化システム２００を示す概略図である。It is the schematic which shows the in-situ purification system 200 of the contaminated soil which concerns on 2nd Embodiment of this invention. 本発明の第３実施形態に係る汚染土壌の原位置浄化システム３００を示す概略図である。It is the schematic which shows the in-situ purification system 300 of the contaminated soil which concerns on 3rd Embodiment of this invention. 本発明のその他の実施形態に係る汚染土壌の原位置浄化システムにおける中央部の断面図である。It is sectional drawing of the center part in the in-situ purification system of the contaminated soil which concerns on other embodiment of this invention.

＝＝＝第１実施形態（加熱体１０が設けられた構成）＝＝＝
図１は、本発明の第１実施形態に係る汚染土壌の原位置浄化システム１００を示す概略図である。図１に示す汚染土壌の原位置浄化システム１００は、エア噴射管１、ガス回収管２、及び水平加熱帯３を備えている。 === 1st Embodiment (structure provided with the heating body 10) ===
FIG. 1 is a schematic view showing an in-situ purification system 100 for contaminated soil according to the first embodiment of the present invention. A contaminated soil in-situ purification system 100 shown in FIG. 1 includes an air injection pipe 1, a gas recovery pipe 2, and a horizontal heating zone 3.

エア噴射管１は、ＶＯＣに汚染された汚染土壌中に鉛直方向に配設されており、その先端部にはエア噴射口が設けられ、当該先端が地下水面付近まで到達している。エア噴射管１の先端部には、加熱体１０が設けられている。ガス回収管２は、有孔管であり、ポンプなどでガス吸引するように構成されており、土壌中の地表側において水平方向に配設されている。また、水平加熱帯３は、土壌中のガス回収管２の下方において当該ガス回収管２と平行に配設されている。   The air injection pipe 1 is arranged in the vertical direction in the contaminated soil contaminated with VOC, and an air injection port is provided at the tip thereof, and the tip reaches the vicinity of the groundwater surface. A heating body 10 is provided at the tip of the air injection tube 1. The gas recovery pipe 2 is a perforated pipe, is configured to suck gas with a pump or the like, and is disposed in the horizontal direction on the ground surface side in the soil. The horizontal heating zone 3 is arranged in parallel with the gas recovery pipe 2 below the gas recovery pipe 2 in the soil.

なお、エア噴射管１は、例えば、特許第３７１１８１９号の「汚染地盤や廃棄物埋立地盤の浄化装置」などであり、具体的には、汚染地盤や廃棄物埋立地盤に挿入される注入井と、この注入井の上端部に取り付けられて超高圧（０．２〜０．７ＭＰａ程度）の圧搾空気を短時間の間隔でパルス状にして間欠的に該注入井に供給する高圧間欠注入装置と、該圧搾空気の供給経路に接続され浄化促進成分を圧搾空気に添加する浄化促進成分供給設備とを備えて、上記注入井の噴出口から圧搾空気とともに浄化促進成分を汚染地盤や廃棄物埋立地盤中に吹き込む汚染地盤や廃棄物埋立地盤の浄化装置であり、高圧間欠注入装置は、エアコンプレッサで発生される高圧の圧搾空気が供給管を介して導入されるタンクと、タンク内の圧力が所定圧以上になると瞬時に開弁して圧搾空気を排出するとともに、この排出によってタンク内圧力が低下すると瞬時に閉弁して、圧搾空気を短い間欠タイミングでパルス状に排出する間欠バルブとを備えている。   The air injection pipe 1 is, for example, “Purification device for contaminated ground or waste landfill” in Japanese Patent No. 3711819, specifically, an injection well inserted into the contaminated ground or waste landfill A high-pressure intermittent injection device that is attached to the upper end of the injection well and supplies intermittently pulsed compressed air of ultrahigh pressure (about 0.2 to 0.7 MPa) at short intervals to the injection well And a purification promoting component supply facility connected to the compressed air supply path for adding the purification promoting component to the compressed air, and the compressed promoting component together with the compressed air from the injection port of the injection well is contaminated ground and waste landfill It is a purification device for contaminated ground and waste landfill that blows into it, and the high-pressure intermittent injection device has a tank in which high-pressure compressed air generated by an air compressor is introduced via a supply pipe, and the pressure in the tank is predetermined. More than pressure Then, the valve is instantaneously opened and the compressed air is discharged, and when the pressure in the tank is reduced by this discharge, the valve is instantaneously closed, and an intermittent valve that discharges the compressed air in a pulse form at a short intermittent timing is provided. .

このような汚染土壌の原位置浄化システム１００にあっては、汚染土壌中に、噴射口に加熱体１０が設けられたエア噴射管１が配設されるとともに、土壌中の地表側にガス回収管２が配設されている。そのため、エア噴射管１によって加熱されたエアが広範囲の汚染土壌に噴射され、汚染土壌からＶＯＣがほぼ完全に分離することとなる。そして、分離したＶＯＣは上方へ移動し、ガス回収管２によって分離したＶＯＣがほぼ完全に回収される。   In the in-situ purification system 100 for such contaminated soil, the air injection pipe 1 having the heating body 10 provided at the injection port is disposed in the contaminated soil, and gas recovery is performed on the ground surface side in the soil. A tube 2 is provided. Therefore, the air heated by the air injection pipe 1 is injected into a wide range of contaminated soil, and the VOC is almost completely separated from the contaminated soil. The separated VOC moves upward, and the separated VOC is recovered almost completely by the gas recovery pipe 2.

このようにして、汚染土壌の原位置浄化システム１００によれば、広範囲の汚染土壌からＶＯＣを十分に除去することが可能となるのである。なお、ガス回収管２の下方には、水平加熱帯３が配設されているので、ＶＯＣを連行するエアが水平加熱帯３によって加熱されることになり、ＶＯＣは揮発性を維持することとなる。そのため、汚染土壌から分離したＶＯＣは、ガス回収管２によって確実に回収される。   Thus, according to the in-situ purification system 100 of contaminated soil, it becomes possible to fully remove VOC from a wide range of contaminated soil. Since the horizontal heating zone 3 is disposed below the gas recovery pipe 2, the air entrained by the VOC is heated by the horizontal heating zone 3, and the VOC maintains volatility. Become. Therefore, the VOC separated from the contaminated soil is reliably recovered by the gas recovery pipe 2.

しかも、汚染土壌の原位置浄化システム１００にあっては、地表側に、高温高圧の液体や蒸気が流れる配管を配設する必要がないので、配管漏れなどのおそれがない。また、汚染土壌の原位置浄化システム１００にあっては、蒸気噴射法と異なり、土中に発熱体若しくは発熱帯が設けられているため、これらによる発熱エネルギーは、ほぼすべて土中加熱に消費されることから、熱効率の点でも優れている。   In addition, in the in-situ purification system 100 for contaminated soil, it is not necessary to arrange a pipe through which high-temperature and high-pressure liquid or steam flows on the ground surface side, so there is no possibility of pipe leakage or the like. Further, in the in-situ purification system 100 for contaminated soil, unlike the steam injection method, since a heating element or a tropical zone is provided in the soil, almost all of the generated heat energy is consumed for heating in the soil. Therefore, it is excellent also in terms of thermal efficiency.

＝＝＝第２実施形態（鉛直加熱帯２０が設けられた構成）＝＝＝
図２（ａ）は、本発明の第２実施形態に係る汚染土壌の原位置浄化システム２００を示す概略図であり、図２（ｂ）は、図２（ａ）の中央部付近の断面図である。 === Second Embodiment (Configuration with Vertical Heating Zone 20) ===
Fig. 2 (a) is a schematic view showing an in-situ purification system 200 for contaminated soil according to the second embodiment of the present invention, and Fig. 2 (b) is a cross-sectional view in the vicinity of the center of Fig. 2 (a). It is.

図２（ａ）に示す汚染土壌の原位置浄化システム２００は、エア噴射管１、ガス回収管２、及び水平加熱帯３を備えるとともに、鉛直加熱帯２０を備えている。   The contaminated soil in-situ purification system 200 shown in FIG. 2A includes an air injection pipe 1, a gas recovery pipe 2, and a horizontal heating zone 3, and a vertical heating zone 20.

エア噴射管１、ガス回収管２、及び水平加熱帯３は、それぞれ、図１に示したものとほぼ同様のものであるが、図２（ａ）に示すエア噴射管１は、図１に示したエア噴射管１と異なり、その先端部には、加熱体１０が設けられていない。   The air injection pipe 1, the gas recovery pipe 2, and the horizontal heating zone 3 are substantially the same as those shown in FIG. 1, but the air injection pipe 1 shown in FIG. Unlike the air injection pipe 1 shown, the heating body 10 is not provided at the tip thereof.

鉛直加熱帯２０は、複数の加熱帯からなるフレキシブル加熱帯（例えば、夢現テクノ株式会社製のアグリヒータ４０若しくはアグリヒータ６０など）であり、汚染土壌に対して鉛直方向に配設され、より具体的には、図２（ｂ）に示すように、エア噴射管１を中心として、その同心円上に配設されている。フレキシブル加熱帯は、帯状の薄い金属体からなり、その両端が電気配線された電熱方式の加熱帯である。このフレキシブル加熱帯は、フレキシブルで容易にロール状に巻き取ることが可能であり、しかも、土木用のペーパードレーン打設機械などにより地中に打設することも可能である。   The vertical heating zone 20 is a flexible heating zone composed of a plurality of heating zones (for example, Aguriheater 40 or Aguriheater 60 made by Yume Techno Co., Ltd.) and is arranged in a vertical direction with respect to the contaminated soil, and more specifically. As shown in FIG. 2 (b), the air injection pipe 1 is arranged on the concentric circle with the air injection tube 1 as the center. The flexible heating zone is an electric heating type heating zone made of a thin metal strip and electrically wired at both ends. This flexible heating zone is flexible and can be easily wound into a roll, and can also be placed in the ground by a paper drain placing machine for civil engineering.

このような汚染土壌の原位置浄化システム２００にあっては、汚染土壌中にエア噴射管１が配設されるとともに、エア噴射管１の周囲に鉛直加熱帯２０が配設され、土壌中の地表側にガス回収管２が配設されている。そのため、エア噴射管１によって汚染土壌にエアが噴射され、鉛直加熱帯２０によって加熱された汚染土壌からが分離し、分離したＶＯＣがガス回収管２によって回収されることとなる。また、汚染土壌の原位置浄化システム２００にあっては、汚染土壌の原位置浄化システム１００と同様の構成を有するため、熱効率の点でも優れている。   In such an in-situ purification system 200 for contaminated soil, the air injection pipe 1 is provided in the contaminated soil, and the vertical heating zone 20 is provided around the air injection pipe 1 so that the A gas recovery pipe 2 is disposed on the surface side. Therefore, air is injected into the contaminated soil by the air injection tube 1 and separated from the contaminated soil heated by the vertical heating zone 20, and the separated VOC is recovered by the gas recovery tube 2. In addition, the contaminated soil in-situ purification system 200 has the same configuration as the contaminated soil in-situ purification system 100, and thus is excellent in terms of thermal efficiency.

＝＝＝第３実施形態（加熱体１０及び鉛直加熱帯２０が設けられた構成）＝＝＝
図３は、本発明の第３実施形態に係る汚染土壌の原位置浄化システム３００を示す概略図である。 === Third Embodiment (Configuration with Heating Body 10 and Vertical Heating Zone 20) ===
FIG. 3 is a schematic diagram showing an in-situ purification system 300 for contaminated soil according to the third embodiment of the present invention.

図３に示す汚染土壌の原位置浄化システム３００は、図１に示した汚染土壌の原位置浄化システム１００と、図２（ｂ）に示した汚染土壌の原位置浄化システム２００とを組み合わせたものであり、エア噴射管１、ガス回収管２、水平加熱帯３及び鉛直加熱帯２０を備え、エア噴射管１の先端部には、加熱体１０が設けられている。   The contaminated soil in-situ purification system 300 shown in FIG. 3 is a combination of the contaminated soil in-situ purification system 100 shown in FIG. 1 and the contaminated soil in-situ purification system 200 shown in FIG. The air injection pipe 1, the gas recovery pipe 2, the horizontal heating zone 3 and the vertical heating zone 20 are provided, and a heating body 10 is provided at the tip of the air injection pipe 1.

このような汚染土壌の原位置浄化システム３００にあっては、汚染土壌中に、噴射口に加熱体１０が設けられたエア噴射管１が配設されるとともに、エア噴射管１の周囲に鉛直加熱帯２０が配設され、土壌中の地表側にはガス回収管２が配設されている。そのため、エア噴射管１によって汚染土壌に加熱されたエアが噴射され、加熱されたエア及び鉛直加熱帯２０の双方の作用によって汚染土壌が加熱される。その結果、汚染土壌からＶＯＣが分離し易くなり、分離したＶＯＣがガス回収管２によって回収されることとなる。また、汚染土壌の原位置浄化システム３００にあっては、汚染土壌の原位置浄化システム１００、２００と同様の構成を有するため、熱効率の点でも優れている。   In the contaminated soil in-situ purification system 300, the air injection pipe 1 provided with the heating body 10 at the injection port is disposed in the contaminated soil, and the air injection pipe 1 is vertically disposed around the air injection pipe 1. A heating zone 20 is disposed, and a gas recovery pipe 2 is disposed on the ground surface side in the soil. Therefore, heated air is sprayed onto the contaminated soil by the air jet tube 1, and the contaminated soil is heated by the action of both the heated air and the vertical heating zone 20. As a result, the VOC is easily separated from the contaminated soil, and the separated VOC is recovered by the gas recovery pipe 2. In addition, the contaminated soil in-situ purification system 300 has the same configuration as the contaminated soil in-situ purification systems 100 and 200, and thus is excellent in terms of thermal efficiency.

＝＝＝その他の実施形態＝＝＝
以上の各実施形態に関する説明は、本発明の理解を容易にするためのものであり、本発明を限定するものではない。本発明は、その趣旨、目的を逸脱することなく、変更、改良され得るとともに、本発明にはその等価物が含まれることは勿論である。 === Other Embodiments ===
The above description regarding each embodiment is for facilitating the understanding of the present invention, and does not limit the present invention. The present invention can be changed and improved without departing from the spirit and purpose of the present invention, and the present invention naturally includes equivalents thereof.

例えば、図２（ｂ）に示すように、本発明の第２実施形態では、エア噴射管１の同心円上に鉛直加熱帯２０を４枚配設することとしたが、本発明は、この第２実施形態の構成に限定されるものではなく、その枚数は任意であり、例えば、図４に示すように、エア噴射管１の同心円上に鉛直加熱帯２０を８枚配設することとしてもよい。   For example, as shown in FIG. 2 (b), in the second embodiment of the present invention, four vertical heating zones 20 are arranged on the concentric circle of the air injection tube 1. The configuration is not limited to the configuration of the second embodiment, and the number thereof is arbitrary. For example, as shown in FIG. 4, eight vertical heating zones 20 may be arranged on a concentric circle of the air injection pipe 1. Good.

また、本発明は、エア噴射及び土中加熱を主要な構成要件とするものであるが、エア噴射及び土中加熱の形態は、上記実施形態に示したものに限定されるものではない。例えば、エア噴射の形態は、連続式、間欠式を問わず、また、非加熱エア（常温のエア）を噴射する形態のみならず、加熱エアを噴射する形態であってもよい。さらに、エア噴射の形態は、乾燥したエアを噴射する形態に限定されるものではなく、蒸気が含まれるエアを噴射する形態であってもよい。   Moreover, although this invention makes air injection and submerged heating a main component, the form of air injection and submerged heating is not limited to what was shown to the said embodiment. For example, the form of air injection is not limited to a continuous type or an intermittent type, and may be a form of injecting heated air as well as a form of injecting non-heated air (normal temperature air). Furthermore, the form of air injection is not limited to the form of injecting dry air, and may be the form of injecting air containing steam.

１ エア噴射管
２ ガス回収管
３ 水平加熱帯
１０ 加熱体
２０ 鉛直加熱帯
１００、２００、３００ 汚染土壌の原位置浄化システム DESCRIPTION OF SYMBOLS 1 Air injection pipe 2 Gas recovery pipe 3 Horizontal heating zone 10 Heating body 20 Vertical heating zone 100, 200, 300 In-situ purification system of contaminated soil

Claims (6)

揮発性有機化合物で汚染された汚染土壌を原位置で浄化するための汚染土壌の原位置浄化方法であって、
前記汚染土壌中に、エア噴射口に加熱体が設けられたエア噴射管を配設するとともに、当該汚染土壌中の地表側にガス回収管を配設し、前記エア噴射管によって前記汚染土壌へ加熱されたエアを噴射することにより、前記汚染土壌から前記揮発性有機化合物を分離させ、分離した前記揮発性有機化合物を前記ガス回収管によって回収することを特徴とする汚染土壌の原位置浄化方法。 An in-situ purification method for contaminated soil for in-situ purification of contaminated soil contaminated with volatile organic compounds,
In the contaminated soil, an air injection pipe provided with a heating body at the air injection port is disposed, and a gas recovery pipe is disposed on the ground surface side in the contaminated soil. In-situ purification method of contaminated soil, wherein the volatile organic compound is separated from the contaminated soil by spraying heated air, and the separated volatile organic compound is recovered by the gas recovery pipe . 揮発性有機化合物で汚染された汚染土壌を原位置で浄化するための汚染土壌の原位置浄化方法であって、
前記汚染土壌中にエア噴射管を配設するとともに、当該エア噴射管の周囲に加熱帯を配設する一方で、当該汚染土壌中の地表側にガス回収管を配設し、前記エア噴射管によって前記汚染土壌へエアを噴射することにより、前記加熱帯によって加熱された前記汚染土壌から前記揮発性有機化合物を分離させ、分離した前記揮発性有機化合物を前記ガス回収管によって回収することを特徴とする汚染土壌の原位置浄化方法。 An in-situ purification method for contaminated soil for in-situ purification of contaminated soil contaminated with volatile organic compounds,
An air injection pipe is provided in the contaminated soil, and a heating zone is provided around the air injection pipe, while a gas recovery pipe is provided on the ground surface side in the contaminated soil, and the air injection pipe The volatile organic compound is separated from the contaminated soil heated by the heating zone by injecting air into the contaminated soil by, and the separated volatile organic compound is recovered by the gas recovery pipe. In-situ purification method for contaminated soil. 揮発性有機化合物で汚染された汚染土壌を原位置で浄化するための汚染土壌の原位置浄化方法であって、
前記汚染土壌中に、エア噴射口に加熱体が設けられたエア噴射管を配設するとともに、当該エア噴射管の周囲に加熱帯を配設する一方で、当該汚染土壌中の地表側にガス回収管を配設し、前記エア噴射管によって前記汚染土壌へ加熱されたエアを噴射することにより、前記加熱帯によって加熱された前記汚染土壌から前記揮発性有機化合物を分離させ、分離した前記揮発性有機化合物を前記ガス回収管によって回収することを特徴とする汚染土壌の原位置浄化方法。 An in-situ purification method for contaminated soil for in-situ purification of contaminated soil contaminated with volatile organic compounds,
In the contaminated soil, an air injection pipe having a heating body provided at the air injection port is disposed, and a heating zone is disposed around the air injection pipe, while a gas is disposed on the ground surface side in the contaminated soil. A recovery pipe is provided, and the volatile organic compound is separated from the contaminated soil heated by the heating zone by injecting air heated to the contaminated soil by the air injection pipe, and the separated volatilization A method for in-situ purification of contaminated soil, wherein the organic organic compound is recovered by the gas recovery pipe. 揮発性有機化合物で汚染された汚染土壌を原位置で浄化するための汚染土壌の原位置浄化システムであって、
前記汚染土壌中に配設されたエア噴射管と、
前記エア噴射管のエア噴射口に設けられた加熱体と、
前記汚染土壌中の地表側に配設されたガス回収管と、
を有することを特徴とする汚染土壌の原位置浄化システム。 An in situ purification system for contaminated soil for in situ purification of contaminated soil contaminated with volatile organic compounds,
An air jet pipe disposed in the contaminated soil;
A heating element provided at an air injection port of the air injection tube;
A gas recovery pipe disposed on the surface side in the contaminated soil;
An in-situ purification system for contaminated soil, comprising: 揮発性有機化合物で汚染された汚染土壌を原位置で浄化するための汚染土壌の原位置浄化システムであって、
前記汚染土壌中に配設されたエア噴射管と、
前記汚染土壌中のうち前記エア噴射管の周囲に配設された加熱帯と、
前記汚染土壌中の地表側に配設されたガス回収管と、
を有することを特徴とする汚染土壌の原位置浄化システム。 An in situ purification system for contaminated soil for in situ purification of contaminated soil contaminated with volatile organic compounds,
An air jet pipe disposed in the contaminated soil;
A heating zone disposed around the air jet pipe in the contaminated soil;
A gas recovery pipe disposed on the surface side in the contaminated soil;
An in-situ purification system for contaminated soil, comprising: 揮発性有機化合物で汚染された汚染土壌を原位置で浄化するための汚染土壌の原位置浄化システムであって、
前記汚染土壌中に配設されたエア噴射管と、
前記エア噴射管のエア噴射口に設けられた加熱体と、
前記汚染土壌中のうち前記エア噴射管の周囲に配設された加熱帯と、
前記汚染土壌中の地表側に配設されたガス回収管と、
を有することを特徴とする汚染土壌の原位置浄化システム。 An in situ purification system for contaminated soil for in situ purification of contaminated soil contaminated with volatile organic compounds,
An air jet pipe disposed in the contaminated soil;
A heating element provided at an air injection port of the air injection tube;
A heating zone disposed around the air jet pipe in the contaminated soil;
A gas recovery pipe disposed on the surface side in the contaminated soil;
An in-situ purification system for contaminated soil, comprising:
JP2009074987A 2009-03-25 2009-03-25 Method and system for cleaning contaminated soil in situ Pending JP2010227733A (en)

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