JP4915574B2 - Soil purification system - Google Patents

Soil purification system Download PDF

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JP4915574B2
JP4915574B2 JP2007130294A JP2007130294A JP4915574B2 JP 4915574 B2 JP4915574 B2 JP 4915574B2 JP 2007130294 A JP2007130294 A JP 2007130294A JP 2007130294 A JP2007130294 A JP 2007130294A JP 4915574 B2 JP4915574 B2 JP 4915574B2
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well
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JP2008284436A (en
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雅晴 田崎
和夫 岡村
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Shimizu Corp
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本発明は、地下水位上部の土壌中の揮発性有機化合物、揮発性有機塩素化合物、油分等の汚染物質を除去する土壌浄化システムに関する。   The present invention relates to a soil purification system that removes contaminants such as volatile organic compounds, volatile organic chlorine compounds, and oils in the soil above the groundwater level.

従来、揮発性有機化合物や揮発性有機塩素化合物等の土壌汚染物質を除去するために、地表から地中の汚染領域まで井戸を掘削し、この井戸にガス抽出用のパイプを配置し、地上に配置した真空ポンプによってパイプ内を吸引して負圧にし、土壌中の揮発性の汚染物質をガスとして吸引して回収、分解処理する真空抽出法が実施されている。また、特開平８−３２３３３９号公報には、汚染部を含む領域に地表から地中の汚染領域に達する複数の井戸を掘削し、前記複数の井戸の一部を地中にコンプレッサからの高圧気体を送り込む送気井戸とし、残る井戸を吸引ポンプにより地中の気体を吸引する吸引井戸とし、地中に気体流通通路を形成して地中の汚染物質を除去する土壌浄化方法が開示されている。
特開平８−３２３３３９号公報 Conventionally, in order to remove soil pollutants such as volatile organic compounds and volatile organic chlorine compounds, a well was excavated from the surface of the earth to the contaminated area in the ground, and a pipe for gas extraction was placed in this well. A vacuum extraction method in which the inside of a pipe is sucked into a negative pressure by an arranged vacuum pump, and volatile pollutants in the soil are sucked as a gas to be collected and decomposed has been implemented. Japanese Patent Laid-Open No. 8-323339 discloses excavating a plurality of wells that reach a contaminated area in the ground from the surface in a region including a contaminated portion, and a part of the plurality of wells is discharged from a compressor into the ground. A soil remediation method is disclosed in which an air supply well that feeds water is used, a remaining well is a suction well that sucks underground gas by a suction pump, and a gas passage is formed in the ground to remove underground contaminants. .
JP-A-8-323339

しかしながら、従来の土壌浄化方法においては、コンプレッサ、吸引ポンプ、配管等の大がかりな地上設備と電力又はエンジン動力を必要とし、コストも高価なものとなる。また、人家が隣接する区域では騒音の問題も発生する。そのため、浄化を急がない区域や、地上部分に余裕がない区域、人家が隣接する区域では適応が難しく、さらに、浄化範囲が狭い区域で従来の土壌浄化方法を適用すると過剰スペックとなるという問題を有するものであった。   However, the conventional soil purification method requires large ground facilities such as a compressor, a suction pump, and piping, and electric power or engine power, and is expensive. In addition, noise problems also occur in areas where people are adjacent. Therefore, it is difficult to adapt to areas where there is no urgent purification, areas where there is not enough space on the ground, and areas where people are adjacent to each other. It was what had.

本発明は、前記課題を解決する、浄化を急がない区域、地表部分に余裕がない区域、浄化範囲が狭い区域、人家が隣接する区域での土壌浄化に適した自然エネルギーを利用した簡易な土壌浄化システムを提供することを目的とする。
以上 The present invention solves the above-mentioned problems, and uses simple energy utilizing natural energy suitable for soil purification in areas where there is no urgent purification, areas where the surface area is not sufficient, areas where the purification range is narrow, and areas where people are adjacent. The purpose is to provide a soil purification system.
more than

本発明の土壌浄化システムは、前記課題を解決するために、地中の汚染土壌領域に地表から井戸を掘削し、前記井戸を土壌ガス吸引用井戸とし、前記土壌ガス吸引用井戸に排気用パイプをその上部が地表から突き出すように設置し、前記排気用パイプの上部に風力で駆動する風車と前記風車の回転力を伝達する動力伝達機構と前記排気用パイプ内に上昇流を発生させるファンとを連結設置するか、前記排気用パイプの上部に風力で駆動され前記排気用パイプ内に上昇流を発生させるベンチレータを設置することを特徴とする。 In order to solve the above problems , the soil purification system of the present invention excavates a well from the ground surface in a contaminated soil region in the ground, the well is used as a soil gas suction well, and the exhaust pipe is connected to the soil gas suction well. A wind turbine driven by wind power to the upper portion of the exhaust pipe, a power transmission mechanism for transmitting the rotational force of the wind turbine, and a fan for generating an upward flow in the exhaust pipe Or a ventilator that is driven by wind power and generates an upward flow in the exhaust pipe .

また、本発明の土壌浄化システムは、前記土壌ガス吸引用井戸により吸引される汚染物質が揮発性有機化合物、硫化水素であることを特徴とする。 The soil purification system of the present invention is characterized in that the contaminant sucked by the soil gas suction well is a volatile organic compound, hydrogen sulfide.

また、本発明の土壌浄化システムは、前記土壌ガス吸引用井戸に汚染物質に応じて吸着物質を配置することを特徴とする。 The soil purification system of the present invention is characterized in that an adsorbing substance is arranged in the soil gas suction well according to a pollutant.

また、本発明の土壌浄化システムは、前記土壌ガス吸引用井戸と地表から汚染土壌領域に掘削され地中に空気を送り込む送気用井戸とを組み合わせて配置することを特徴とする。 Also, soil remediation system according to the present invention is characterized by arranging a combination of the air supply wells for feeding air into the ground excavated contaminated soil region from the soil gas suction wells and surface.

本発明の土壌浄化システムにおいて、地中の汚染土壌領域に地表から井戸を掘削し、前記井戸を土壌ガス吸引用井戸とし、前記土壌ガス吸引用井戸に排気用パイプをその上部が地表から突き出すように設置し、前記排気用パイプの上部に風力で駆動する風車と前記風車の回転力を伝達する動力伝達機構と前記排気用パイプ内に上昇流を発生させるファンとを連結設置するか、前記排気用パイプの上部に風力で駆動され前記排気用パイプ内に上昇流を発生させるベンチレータを設置する構成により、地表設備を必要とせず、コストが安価、騒音の発生も少なくので、処理を急がない区域、地上部分に余裕がない区域、人家が隣接する区域、浄化範囲が狭い区域での汚染土壌の処理に適した簡易な土壌浄化システムとすることができる。また、自然エネルギーとして風力を用いる構成により、風車、ベンチレータ等の安価に入手可能な部材を用いることができ、ピッチを変えることにより、送気用にも吸引用にも簡単に切換できる。
土壌ガス吸引用井戸により吸引される汚染物質が揮発性有機化合物、硫化水素とする構成により、汚染物質をガスとして除去できる。
土壌ガス吸引用井戸に汚染物質に応じて吸着物質を配置する構成により、土壌ガスを無害化して大気中に放出できる。
土壌ガス吸引用井戸と地表から汚染土壌領域に掘削され地中に空気を送り込む送気用井戸とを組み合わせて配置する構成により、土壌中に通気路を形成し効率良く浄化ができ、複数の汚染物質を効率良く除去することができる。 In the soil purification system of the present invention, a well is excavated from the ground surface in a contaminated soil region in the ground, the well is used as a soil gas suction well, and an exhaust pipe protrudes from the ground surface to the soil gas suction well. A windmill driven by wind power, a power transmission mechanism that transmits the rotational force of the windmill, and a fan that generates an upward flow in the exhaust pipe, or the exhaust pipe By installing a ventilator that is driven by wind power and generates an upward flow in the exhaust pipe at the top of the pipe, there is no need for surface equipment, low cost, low noise generation, and quick processing. It is possible to provide a simple soil purification system suitable for treating contaminated soil in an area, an area where there is no room on the ground, an area where a house is adjacent, or an area where the purification range is narrow. In addition, by using wind power as natural energy, inexpensively available members such as a windmill and a ventilator can be used, and by changing the pitch, it is possible to easily switch between air supply and suction.
The pollutant can be removed as a gas by the configuration in which the pollutant sucked by the soil gas suction well is a volatile organic compound or hydrogen sulfide.
By arranging the adsorbing substance in the soil gas suction well according to the pollutant, the soil gas can be rendered harmless and released into the atmosphere.
A structure that combines a soil gas suction well and an air supply well that is excavated from the surface of the soil into a contaminated soil area and sends air into the ground. Substances can be removed efficiently.

本発明の実施の形態を図により説明する。図１、図２は、本発明の土壌浄化システムの土壌ガス吸引用井戸１の一実施形態を示す図である。   Embodiments of the present invention will be described with reference to the drawings. 1 and 2 are views showing an embodiment of a soil gas suction well 1 of the soil purification system of the present invention.

土壌ガス吸引用井戸１は、地中の汚染土壌領域に地表から井戸を掘削し、掘削された井戸にパイプ２を設置する。井戸は地下水位より上まで掘削する。地下水位の下まで井戸を掘削すると、井戸内に地下水が溜り、ブロワーや真空ポンプのように強力な吸引力がないため土壌ガスを吸引できないため、地下水位より上部に井戸を掘削する。吸引する土壌ガスとしては、テトラクロロエチレン、トリクロロエチレン、ベンゼン等の揮発性有機化合物や硫化水素である。   The soil gas suction well 1 excavates a well from the ground surface in a contaminated soil region in the ground, and installs a pipe 2 in the excavated well. The well is drilled above the groundwater level. When a well is drilled below the groundwater level, groundwater accumulates in the well and soil gas cannot be sucked because there is no strong suction like a blower or vacuum pump, so the well is drilled above the groundwater level. Soil gases to be sucked in are volatile organic compounds such as tetrachloroethylene, trichloroethylene, and benzene, and hydrogen sulfide.

パイプ２の下端開口が土壌ガスを吸引するための吸引口３となっており、この吸引口３にストレーナ４を連結する。ストレーナ４の内部には割石等を充填すると良い。パイプ２の上部は地表から所定高さ突き出すようにし、その上端部を閉じた状態とし、雨水がパイプ２内に浸入するのを防止する。パイプ２の上部付近に吸引した土壌ガスを大気に放出する放出口５が形成される。パイプ２の上端に自然エネルギーである風力により回転する風車６を設置する。   A lower end opening of the pipe 2 serves as a suction port 3 for sucking soil gas, and a strainer 4 is connected to the suction port 3. The inside of the strainer 4 is preferably filled with quarry stone or the like. The upper part of the pipe 2 protrudes from the ground surface at a predetermined height, and the upper end of the pipe 2 is closed to prevent rainwater from entering the pipe 2. A discharge port 5 is formed in the vicinity of the upper portion of the pipe 2 to discharge the sucked soil gas to the atmosphere. At the upper end of the pipe 2 is installed a windmill 6 that is rotated by wind power, which is natural energy.

風車６の回転力は動力伝達機構７を介してパイプ２の上部に配置したファン８を回転させ、パイプ３中に上昇流を発生させ、土壌中のガスを吸引し、吸引された土壌ガスをパイプ２の上部に形成した放出口５から大気中に放出する。   The rotational force of the windmill 6 rotates the fan 8 disposed on the upper part of the pipe 2 through the power transmission mechanism 7 to generate an upward flow in the pipe 3 and sucks the gas in the soil. It discharges into the atmosphere from the discharge port 5 formed in the upper part of the pipe 2.

図２に示されるように、パイプ２内のファン８の設置箇所の下部に吸引した土壌ガスを吸着する活性炭等の吸着材を充填した吸着材充填部９を形成しても良い。吸着材充填部９を形成することにより、有害な土壌ガスが吸着材に吸着され大気中への土壌ガスの放出量を低減できる。   As shown in FIG. 2, an adsorbent filling portion 9 filled with an adsorbent such as activated carbon that adsorbs the sucked soil gas may be formed at the lower portion of the installation location of the fan 8 in the pipe 2. By forming the adsorbent filling portion 9, harmful soil gas is adsorbed by the adsorbent, and the amount of released soil gas into the atmosphere can be reduced.

図３は、本発明の土壌浄化システムの土壌ガス吸引用井戸１の他の実施形態を示す図である。この実施形態では、パイプ２の上端にトイレの臭気放出用のベンチレータ１０を設置し、自然エネルギーである風力によりベンチレータ１０を回転させ、パイプ２中に上昇流を発生させ、土壌ガスを吸引し、大気中に放出する。吸着材充填部９を形成する構成は、図２に示される実施形態と同様である。   FIG. 3 is a diagram showing another embodiment of the soil gas suction well 1 of the soil purification system of the present invention. In this embodiment, the ventilator 10 for toilet odor release is installed at the upper end of the pipe 2, the ventilator 10 is rotated by wind power that is natural energy, an upward flow is generated in the pipe 2, and the soil gas is sucked. Release into the atmosphere. The configuration for forming the adsorbent filling portion 9 is the same as that of the embodiment shown in FIG.

図１〜３に示される土壌ガス吸引用井戸１の実施形態では、自然エネルギーとして風力を用いているが、パイプ２の上部外周に太陽電池を設置し、太陽電池により発電された電力をバッテリーに蓄電し、それを電源として駆動される小型モータにより、図１、２に示されるファン８や図３に示されるベンチレータ１０を回転させる自然エネルギーとして太陽エネルギーを用いても良い。さらに、風力と太陽エネルギーを併用して用いても良い。風力と太陽エネルギーを併用することで、天候条件の変化への対応性が向上する。土壌ガス吸引用井戸１は、処理する汚染土壌区域の広さ等に応じて複数は位置しても良い。複数の土壌ガス吸引用井戸１を配置する場合、パイプ２下端の吸引口３、ストレーナ４の配置深さ変えても良い。   In the embodiment of the soil gas suction well 1 shown in FIGS. 1 to 3, wind power is used as natural energy, but a solar cell is installed on the upper outer periphery of the pipe 2, and the electric power generated by the solar cell is used as the battery. Solar energy may be used as natural energy for rotating the fan 8 shown in FIGS. 1 and 2 and the ventilator 10 shown in FIG. Furthermore, wind power and solar energy may be used in combination. The combined use of wind power and solar energy improves the response to changes in weather conditions. A plurality of soil gas suction wells 1 may be positioned depending on the size of the contaminated soil area to be treated. When arranging a plurality of soil gas suction wells 1, the arrangement depth of the suction port 3 and the strainer 4 at the lower end of the pipe 2 may be changed.

図４、５は、本発明の土壌浄化システムの送気用井戸１１の一実施形態を示す図である。送気用井戸１１は、地表から地中の汚染土壌領域に地表から井戸を掘削し、掘削された井戸にパイプ２を設置する。井戸は、地下水位より上に掘削する。地下水位下部の地中に井戸を掘削すると、井戸内に地下水が溜り、ブロワーのように強力な送気力がなく土壌中に空気を注入できないため、地下水位より上部に井戸を掘削する。送気用井戸１は、土壌中に空気を注入し、空気により活性化する微生物により分解される油分や有機物等の汚染物質の浄化をする。   4 and 5 are diagrams showing an embodiment of the air supply well 11 of the soil purification system of the present invention. The air supply well 11 excavates a well from the surface to the contaminated soil region in the ground, and installs the pipe 2 in the excavated well. The well is drilled above the groundwater level. When a well is drilled in the ground below the groundwater level, groundwater accumulates in the well and there is no strong air supply like a blower and air cannot be injected into the soil, so the well is drilled above the groundwater level. The air supply well 1 injects air into the soil and purifies contaminants such as oil and organic matter that are decomposed by microorganisms activated by the air.

パイプ２の下端開口が土壌中に空気を注入するため送気口１２となっており、この送気口１２にストレーナ４を連結する。パイプ２の上部は地表から所定高さ突き出すようにし、その上端を閉じ、雨水がパイプ２内に浸入するのを防止する。パイプ２の上部付近に空気を取り込む空気取込口１３が形成される。パイプ２の上端に自然エネルギーである風力により回転する風車６を設置する。   The lower end opening of the pipe 2 serves as an air inlet 12 for injecting air into the soil, and the strainer 4 is connected to the air inlet 12. The upper part of the pipe 2 protrudes from the ground surface at a predetermined height, and the upper end of the pipe 2 is closed to prevent rainwater from entering the pipe 2. An air intake port 13 for taking in air is formed near the upper portion of the pipe 2. At the upper end of the pipe 2 is installed a windmill 6 that is rotated by wind power, which is natural energy.

風車６の回転力は動力伝達機構７を介してパイプ２の上部に配置したファン８を回転させ、パイプ２中に下降流を発生させ、空気取込口１３から取り込んだ空気を送気口１２から土壌中に空気を注入する。ファン８のピッチを変えることにより、図１、２で示されるファン８とは逆にパイプ２中に下降流を発生させることができる。   The rotational force of the windmill 6 rotates the fan 8 disposed on the upper part of the pipe 2 via the power transmission mechanism 7 to generate a downward flow in the pipe 2, and the air taken in from the air intake port 13 is supplied to the air supply port 12. Inject air into the soil. By changing the pitch of the fans 8, it is possible to generate a downward flow in the pipe 2 as opposed to the fans 8 shown in FIGS.

図６は、本発明の土壌浄化システムの送気用井戸１１の他の実施形態を示す図である。この実施形態では、パイプ２の上端にトイレの臭気放出用のベンチレータ１０を設置し、自然エネルギーである風力によりベンチレータ１０を回転させ、パイプ２中に下降流を発生させ、空気取込口１３から取り込んだ空気を送気口１２から土壌中に空気を注入する。ベンチレータ１０のピッチを変えることにより、図３で示されるベンチレータ１０８とは逆にパイプ２中に下降流を発生させることができる。   FIG. 6 is a diagram showing another embodiment of the air supply well 11 of the soil purification system of the present invention. In this embodiment, a ventilator 10 for releasing toilet odors is installed at the upper end of the pipe 2, the ventilator 10 is rotated by wind power that is natural energy, and a downward flow is generated in the pipe 2, from the air intake port 13. The taken-in air is injected into the soil from the air inlet 12. By changing the pitch of the ventilator 10, it is possible to generate a downward flow in the pipe 2, contrary to the ventilator 108 shown in FIG. 3.

図４〜６に示される送気用井戸１１の実施形態では、自然エネルギーとして風力を用いているが、パイプ２の上部外周に太陽電池を設置し、太陽電池により発電された電力をバッテリーに蓄電し、それを電源として駆動される小型モータにより、図４、５に示されるファン８や図６に示されるベンチレータ１０を回転させる自然エネルギーとして太陽エネルギーを用いても良い。さらに、風力と太陽エネルギーを併用して用いても良い。送気用井戸１１は、処理する汚染土壌区域の広さ等に応じて複数は位置しても良い。複数の送気用井戸１１を配置する場合、パイプ２下端の送気口１２の位置の深さ変えて配置しても良い。   In the embodiment of the air supply well 11 shown in FIGS. 4 to 6, wind power is used as natural energy. However, a solar cell is installed on the upper outer periphery of the pipe 2, and the electric power generated by the solar cell is stored in the battery. However, solar energy may be used as natural energy for rotating the fan 8 shown in FIGS. 4 and 5 and the ventilator 10 shown in FIG. 6 by a small motor driven by using it as a power source. Furthermore, wind power and solar energy may be used in combination. A plurality of air supply wells 11 may be positioned depending on the size of the contaminated soil area to be treated. When arranging a plurality of air supply wells 11, the depth of the position of the air supply port 12 at the lower end of the pipe 2 may be changed.

図７は、本発明の土壌浄化システムの別の実施形態を示す図である。この実施形態では、浄化すべき汚染土壌区域が広い場合、地表から地下水位より上部に位置する地中の汚染土壌領域に複数の井戸を掘削し、前記複数の井戸を土壌ガス吸引用井戸１と送気用井戸１１として区分し、それぞれの土壌ガス吸引用井戸１と送気用井戸１１に自然エネルギーを利用した駆動手段を設置するものである。複数の機能の異なる井戸の配置は、汚染状況や土壌の通気性を考慮して決定される。   FIG. 7 is a diagram showing another embodiment of the soil purification system of the present invention. In this embodiment, when the contaminated soil area to be purified is wide, a plurality of wells are excavated from the ground surface to the contaminated soil area in the ground located above the groundwater level, and the plurality of wells are defined as the soil gas suction well 1. It classifies as the air supply well 11, and the drive means using natural energy is installed in each of the soil gas suction well 1 and the air supply well 11. The arrangement of the wells having different functions is determined in consideration of the pollution situation and the air permeability of the soil.

前記各実施形態では、風車６の回転が水平軸に伝達され、水平軸の回転が傘歯車により垂直回転軸に伝達されファン８を回転する動力伝達機構７のものを例示しているが、図８に示されるように、風車６の羽根の形状を変え、風車６の回転が直接垂直回転軸に伝達されファン８を回転する動力伝達機構７を前記各実施形態に用いても良い。   In the above embodiments, the rotation of the wind turbine 6 is transmitted to the horizontal axis, the rotation of the horizontal axis is transmitted to the vertical rotation axis by the bevel gear, and the power transmission mechanism 7 that rotates the fan 8 is exemplified. As shown in FIG. 8, the power transmission mechanism 7 that changes the shape of the blades of the wind turbine 6 and rotates the fan 8 by transmitting the rotation of the wind turbine 6 directly to the vertical rotation shaft may be used in each of the above embodiments.

本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention.

符号の説明Explanation of symbols

１：土壌ガス吸引用井戸、２：パイプ、３：吸引口、４：ストレーナ、５：放出口、６：風車、７：動力伝達機構、８：ファン、９：吸着材充填部、１０：ベンチレータ、１１：送気用井戸、１２：送気口、１３：空気取込口   1: soil gas suction well, 2: pipe, 3: suction port, 4: strainer, 5: discharge port, 6: windmill, 7: power transmission mechanism, 8: fan, 9: adsorbent filling unit, 10: ventilator 11: Well for air supply, 12: Air supply port, 13: Air intake port

Claims (4)

地中の汚染土壌領域に地表から井戸を掘削し、前記井戸を土壌ガス吸引用井戸とし、前記土壌ガス吸引用井戸に排気用パイプをその上部が地表から突き出すように設置し、前記排気用パイプの上部に風力で駆動する風車と前記風車の回転力を伝達する動力伝達機構と前記排気用パイプ内に上昇流を発生させるファンとを連結設置するか、前記排気用パイプの上部に風力で駆動され前記排気用パイプ内に上昇流を発生させるベンチレータを設置することを特徴とする土壌浄化システム。 A well is excavated from the ground surface in the contaminated soil region in the ground, the well is used as a soil gas suction well, and an exhaust pipe is installed in the soil gas suction well so that the upper part protrudes from the ground surface. A wind turbine driven by wind power, a power transmission mechanism that transmits the rotational force of the wind turbine, and a fan that generates an upward flow in the exhaust pipe are connected to the upper part of the exhaust pipe, or driven by wind power on the upper part of the exhaust pipe A soil remediation system comprising a ventilator for generating an upward flow in the exhaust pipe . 前記土壌ガス吸引用井戸により吸引される汚染物質が揮発性有機化合物、硫化水素であることを特徴とする請求項１に記載の土壌浄化システム。   The soil purification system according to claim 1, wherein the contaminant sucked by the soil gas suction well is a volatile organic compound or hydrogen sulfide. 前記土壌ガス吸引用井戸に汚染物質に応じて吸着物質を配置することを特徴とする請求項１又は２に記載の土壌浄化システム。   The soil purification system according to claim 1 or 2, wherein an adsorbing substance is arranged in the soil gas suction well according to a pollutant. 前記土壌ガス吸引用井戸と地表から汚染土壌領域に掘削され地中に空気を送り込む送気用井戸とを組み合わせて配置することを特徴とする請求項１ないし３のいずれか１項に記載の土壌浄化システム。 The soil according to any one of claims 1 to 3, wherein the soil gas suction well and the air supply well that is excavated from the ground surface into the contaminated soil region and sends air into the ground are disposed in combination. Purification system.
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