JPH05208181A - Facility for gas removal from waste buried reclaimed ground - Google Patents
Facility for gas removal from waste buried reclaimed groundInfo
- Publication number
- JPH05208181A JPH05208181A JP1537492A JP1537492A JPH05208181A JP H05208181 A JPH05208181 A JP H05208181A JP 1537492 A JP1537492 A JP 1537492A JP 1537492 A JP1537492 A JP 1537492A JP H05208181 A JPH05208181 A JP H05208181A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- waste
- gas
- pipe
- water
- 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.)
- Granted
Links
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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
-
- 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
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、廃棄物が埋め立てられ
た地盤において、廃棄物層で発生するガスを除去するた
めの設備に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility for removing gas generated in a waste layer in the ground where waste is landfilled.
【０００２】[0002]
【従来の技術】近年、土地有効利用の一環として、廃棄
物が埋め立てられた地盤を構造物の建築地や公園，ゴル
フ場などに利用することが検討されている。しかし、前
記地盤が廃棄物層を有していることから、経時的に廃棄
物が圧縮されて地盤沈下をもたらすことや、廃棄物の分
解により、爆発の危険性があるメタン等の有機ガスが発
生するという問題があり、その対策が必要とされてい
た。2. Description of the Related Art In recent years, as part of effective land use, it has been considered to use the ground filled with waste materials for construction sites of structures, parks, golf courses and the like. However, since the ground has a waste layer, the waste is compressed over time, resulting in ground subsidence, and decomposition of the waste may cause an organic gas such as methane that has a risk of explosion. There was a problem that it occurred, and it was necessary to take measures against it.
【０００３】このうち、前記地盤沈下については、動圧
密工法や注入工法など既存の改良工法により対応するこ
とができる。一方、前記有機ガス発生については、以下
の二つの方法が検討されている。 （１）地盤の表層部または構造物直下の水平方向に、砕
石層を設けて通気層とし、ここにガス抜き用の排気管ま
たは排気塔を接続して、廃棄物層から通気層に上昇して
きたガスのみを、地上に自然排気または強制排気する。 （２）廃棄物層から地表付近まで鉛直方向に、砕石パイ
ルまたは配管からなる通気管を設けるとともに、砕石層
からなる水平方向の通気層を地盤の表層付近に設けて、
前記通気管をこの通気層に連結する。そして、この通気
層にガス抜き用の排気管または排気塔を接続して、廃棄
物層から通気層に上昇してきたガスのみを、地上に自然
排気または強制排気する。Of these, the ground subsidence can be dealt with by the existing improved construction methods such as the dynamic consolidation construction method and the injection construction method. On the other hand, the following two methods have been studied for the generation of the organic gas. (1) A crushed stone layer is provided in the horizontal direction of the surface layer of the ground or directly below the structure to form a ventilation layer, and an exhaust pipe or exhaust tower for degassing is connected to this to rise from the waste layer to the ventilation layer. Only natural gas or natural gas is forcedly exhausted to the ground. (2) A ventilation pipe consisting of crushed stone piles or pipes is provided vertically from the waste layer to near the surface of the earth, and a horizontal ventilation layer made of crushed stone is provided near the surface layer of the ground,
The vent tube is connected to the vent layer. Then, an exhaust pipe or an exhaust tower for degassing is connected to the ventilation layer, and only the gas rising from the waste layer to the ventilation layer is naturally or forcedly exhausted to the ground.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前記従
来の方法では、通気層に上昇してきたガスを吸引ポンプ
等で強制排気すると、地盤中の間隙圧が低下して地盤沈
下の原因となるため、いずれの方法においても自然排気
を採用することになる。そのため、ガスの除去効率が悪
く、有害ガスを完全に除去するまで長期間を要する。ま
た、廃棄物や土砂の間隙に気泡として付着しているガス
を、完全に除去することはできない。However, in the above-mentioned conventional method, when the gas rising in the ventilation layer is forcibly discharged by a suction pump or the like, the pore pressure in the ground is lowered, which causes ground subsidence. In either method, natural exhaust will be adopted. Therefore, the efficiency of removing the gas is poor, and it takes a long time to completely remove the harmful gas. Moreover, the gas adhering to the gap between the waste and the sand as air bubbles cannot be completely removed.
【０００５】本発明は、このような不具合を解決するた
めのものであり、地盤沈下を起こさずに廃棄物層内で発
生したガスを強制的に排気して、効率良くガスを除去す
ることを目的とする。The present invention is intended to solve such a problem, and to forcibly exhaust the gas generated in the waste layer without causing ground subsidence to efficiently remove the gas. To aim.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、請求項１の廃棄物埋め立て地盤からのガス除去設備
は、廃棄物埋め立て地盤内の地表近傍に、廃棄物層内の
ガスが水と共に導入される通気層を設け、この通気層に
揚水ポンプ付きの揚水配管を施すとともに、この揚水配
管にガス回収装置を接続し、このガス回収装置の下流
に、廃棄物層に達する復水配管を設けたことを特徴とす
る。In order to achieve the above object, the equipment for removing gas from waste landfill ground according to claim 1 is such that the gas in the waste layer is water near the ground surface in the waste landfill ground. A ventilation layer to be introduced together with is provided, and a pumping pipe with a pumping pump is applied to this ventilation layer, and a gas recovery device is connected to this pumping pipe, and a condensate pipe reaching the waste layer downstream of this gas recovery device. Is provided.
【０００７】また、請求項２の廃棄物埋め立て地盤から
のガス除去設備は、廃棄物埋め立て地盤内の地表近傍
に、廃棄物層内のガスが導入される通気層を設け、この
通気層に吸気ポンプ付きのガス取出し配管を設けるとと
もに、廃棄物層に達する空気取入れ配管を施し、この空
気取入れ配管に送気ポンプを設けたことを特徴とする。Further, in the facility for removing gas from waste landfill according to a second aspect, a ventilation layer for introducing gas in the waste layer is provided near the surface of the landfill in the waste land, and the gas is sucked into the ventilation layer. A gas extraction pipe with a pump is provided, an air intake pipe reaching the waste layer is provided, and an air supply pump is provided in the air intake pipe.
【０００８】[0008]
【作用】請求項１のガス回収装置は、廃棄物層内に地下
水がある場合に適用され、揚水ポンプの作動により廃棄
物層内のガスが水と共に通気層に導入され、ここから揚
水配管を通って前記ガスが水と共にガス回収装置に向か
う。このガス回収装置によりガスが分離されて、水だけ
が復水配管を通って廃棄物層に戻る。このようにして水
を循環させ、水圧により廃棄物層中の間隙圧を保持しな
がら、廃棄物層内のガスをガス回収装置から回収する。
これにより、地盤沈下を生じさせずに、廃棄物層で発生
する有害ガスを除去することができる。The gas recovery device of claim 1 is applied when there is groundwater in the waste layer, and the gas in the waste layer is introduced into the aeration layer together with water by the operation of the pump, and the pumping pipe is connected from here. Through it the gas goes with the water to the gas recovery device. Gas is separated by this gas recovery device, and only water returns to the waste layer through the condensate pipe. In this way, water is circulated and the gas in the waste layer is recovered from the gas recovery device while maintaining the pore pressure in the waste layer by the water pressure.
Thereby, the harmful gas generated in the waste layer can be removed without causing subsidence.
【０００９】請求項２のガス回収装置は、廃棄物層内に
地下水がない場合に適用され、送気ポンプと吸気ポンプ
との作動により、空気取入れ配管から廃棄物層内に空気
が導入されるとともに、導入された空気と共に廃棄物層
内のガスが通気層に導入され、ここからガス取出し配管
に向かい排出される。このようにして空気を循環させ、
この空気圧により廃棄物層中の間隙圧を保持しながら、
廃棄物層内のガスを回収する。これにより、地盤沈下を
生じさせずに、廃棄物層で発生する有害ガスを除去する
ことができる。The gas recovery apparatus according to claim 2 is applied when there is no groundwater in the waste layer, and air is introduced into the waste layer from the air intake pipe by the operation of the air supply pump and the intake pump. At the same time, the gas in the waste layer is introduced into the aeration layer together with the introduced air, and is discharged toward the gas extraction pipe from here. Circulating the air in this way,
While maintaining the pore pressure in the waste layer with this air pressure,
Collect the gas in the waste layer. Thereby, the harmful gas generated in the waste layer can be removed without causing subsidence.
【００１０】[0010]
【実施例】以下、本発明の実施例について図面に基づき
説明する。図１および図２は、請求項１の実施例を示す
説明図であり、共に、廃棄物埋め立て地盤１に構造物２
を建設する際における、本発明の適用例を示している。
通常、廃棄物埋め立て地盤１は、地表３側から、表土層
４、廃棄物層５の順に構成され、表土層４と廃棄物層５
との境には、廃棄物層５の蓋となるシート６を介在させ
ている。Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are explanatory views showing an embodiment of claim 1, both of which show a structure 2 on a waste landfill ground 1.
The example of application of the present invention at the time of constructing is shown.
Usually, the waste landfill ground 1 is composed of the surface soil layer 4 and the waste layer 5 in this order from the ground surface 3 side.
A sheet 6 serving as a lid for the waste layer 5 is interposed between the sheet and the boundary.
【００１１】図１の例では、構造物２に対応させて、廃
棄物層５より下の層まで杭７を打ち込んだ後、周面に無
数の細かい孔８ａを有する複数の有孔パイプ８を、廃棄
物層５の下部に達するまで打ち込んである。この孔８ａ
から、廃棄物層５内のガスと水とが有孔パイプ８内に導
入される。そして、表土層４における、構造物２の基礎
下部に相当する位置に、砕石を厚さ３０〜５０cm程度に
敷き詰めることにより、通気層９を形成してある。この
通気層９は、構造物２の基礎スラブ面積よりひとまわり
ほど大きな面積を占め、これの下部に前記有孔パイプ８
の頭部が挿入されており、有孔パイプ８内に入った廃棄
物層５内の水とガスとが、ここから通気層９に導入され
る。また、通気層９の上面は、ガス抜け防止のためにシ
ートなどにより覆われている。そして、通気層９の上部
に向けて、地上から揚水配管１０が施してある。In the example shown in FIG. 1, after the piles 7 have been driven to the layer below the waste layer 5 corresponding to the structure 2, a plurality of perforated pipes 8 having innumerable fine holes 8a on the peripheral surface thereof are provided. It is driven in until it reaches the bottom of the waste layer 5. This hole 8a
From, the gas and water in the waste layer 5 are introduced into the perforated pipe 8. Then, in the topsoil layer 4, a ventilation layer 9 is formed by laying crushed stones in a thickness of about 30 to 50 cm at a position corresponding to the lower part of the foundation of the structure 2. The ventilation layer 9 occupies an area larger than the area of the basic slab of the structure 2, and the perforated pipe 8 is provided under the area.
The water and gas in the waste layer 5 that has entered the perforated pipe 8 are introduced into the aeration layer 9 from here. Further, the upper surface of the ventilation layer 9 is covered with a sheet or the like to prevent gas escape. A pumping pipe 10 is provided from the ground toward the upper part of the ventilation layer 9.
【００１２】この揚水配管１０には揚水ポンプ１１が接
続してあり、その下流にガス回収装置１２が接続してあ
る。このガス回収装置１２は、水と共に導入されたガス
を水から分離して回収するためのものであり、例えば、
ここにしばらく滞留させて、水分が蒸発しにくい程度に
加熱することにより、ガスの分離を促進するものであ
る。そして、取り出したガスは、排気管１２ａから回収
される。A pumping pump 11 is connected to the pumping pipe 10, and a gas recovery device 12 is connected downstream thereof. The gas recovery device 12 is for separating the gas introduced with water from the water and recovering it.
By allowing it to stay here for a while and heating it to such an extent that water does not easily evaporate, gas separation is promoted. Then, the taken out gas is recovered from the exhaust pipe 12a.
【００１３】ガス回収装置１２の下流には、浄化装置１
３を介して、廃棄物層５に達する復水配管１４が接続さ
れている。この復水配管１４においては、地上部分およ
び表土層４部分には通常の水道管を配してあるが、廃棄
物層５部分には前述と同様の有孔パイプ１４ａを用いて
いる。そして、この有孔パイプ１４ａの孔１４ｂから、
廃棄物層５内に水が戻される。Downstream of the gas recovery device 12, the purification device 1
A condensate pipe 14 that reaches the waste layer 5 is connected via 3. In this condensate pipe 14, normal water pipes are arranged in the above-ground portion and the topsoil layer 4 portion, but the same perforated pipe 14a as described above is used in the waste layer 5 portion. Then, from the hole 14b of the perforated pipe 14a,
Water is returned to the waste layer 5.
【００１４】揚水ポンプ１１を作動させれば、廃棄物層
５内のガスは水と共に孔８ａから有孔パイプ８に入り、
ここから通気層９に導入される。この通気層９内に溜ま
ったガスと水とが、揚水配管１０を通ってガス回収装置
１２に向かう。ガス回収装置１２において、廃棄物層５
内で発生したメタンガスなどのガスを水から分離し、水
を浄化装置１３に向かわせ、ガスは排気管１２ａから回
収する。When the pumping pump 11 is operated, the gas in the waste layer 5 enters the perforated pipe 8 through the hole 8a together with water,
From here, it is introduced into the ventilation layer 9. The gas and water accumulated in the ventilation layer 9 pass through the pumping pipe 10 toward the gas recovery device 12. In the gas recovery device 12, the waste layer 5
A gas such as methane gas generated inside is separated from water, the water is directed to the purification device 13, and the gas is recovered from the exhaust pipe 12a.
【００１５】ガスが分離された水は、浄化装置１３にお
いて、水中にイオンとして含有する有害物質が除去され
た後、復水配管１４を通って、有孔パイプ１４の孔１４
ｂから廃棄物層５に戻される。戻された水は、再び廃棄
物層５内のガスと共に、孔８ａから有孔パイプ８内に入
り込んで通気層９に導入される。請求項１では、このよ
うに、廃棄物層５内に存在する水を循環させて、水圧に
より廃棄物層５内で発生するガスを強制的に取り出すも
のであり、ガスと共に廃棄物層５から水が出ていくが、
その分だけ復水により補給されて、廃棄物層５の間隙圧
を保持できる。これにより、廃棄物層５で地盤沈下を生
じさせずに、廃棄物層５内の有害ガスを効率良く除去す
ることができる。また、このような水の流れにより、廃
棄物層５内で廃棄物や土砂の間隙に気泡として付着して
いるガスを通気層９へ導入し易くなるため、有害ガスの
除去効率が高くなる。加えて、ガス回収装置１２により
回収されたメタンガス等を、揚水ポンプ１１を稼働させ
るエネルギー源に利用することもできる。The water from which the gas has been separated, after the harmful substances contained as ions in the water are removed in the purifying device 13, passes through the condensate pipe 14 and the hole 14 of the perforated pipe 14.
It is returned from b to the waste layer 5. The returned water, together with the gas in the waste layer 5, enters the perforated pipe 8 through the hole 8a and is introduced into the aeration layer 9. According to the first aspect, the water existing in the waste layer 5 is circulated in this way to forcibly take out the gas generated in the waste layer 5 due to the water pressure. The water goes out,
The corresponding amount is replenished by condensate, and the pore pressure of the waste layer 5 can be maintained. As a result, the harmful gas in the waste layer 5 can be efficiently removed without causing subsidence in the waste layer 5. Further, such a flow of water facilitates the introduction of the gas adhering as bubbles in the gaps between the waste and the soil in the waste layer 5 into the aeration layer 9, so that the harmful gas removal efficiency is increased. In addition, the methane gas or the like recovered by the gas recovery device 12 can be used as an energy source for operating the pumping pump 11.
【００１６】さらに、この例では、浄化装置１３を設け
ているため、水中に溶けている有害物質を除去すること
もでき、例えばゴルフ場などでは農薬の除去ができると
いう利点もある。この浄化装置１３の設置により、廃棄
物層５内にきれいな水が送り込まれるため、廃棄物の分
解速度が速められて、ガスの発生を早期に終了させるこ
ともできる。なお、復水配管１４に外部から水を導入し
て、復水以上の水量を廃棄物層５内に供給してもよい。Further, in this example, since the purifying device 13 is provided, it is possible to remove harmful substances dissolved in water, and there is an advantage that pesticides can be removed, for example, at a golf course. By installing the purifying device 13, clean water is sent into the waste layer 5, so that the decomposition rate of the waste can be increased and the generation of gas can be terminated early. Note that water may be introduced from the outside into the condensate pipe 14 to supply an amount of water equal to or greater than the condensate into the waste layer 5.
【００１７】図２に示した例では、廃棄物層５の上部に
構造物２の基礎を置いているため、図１の場合のような
有孔パイプ８を配置しなくとも、シート６に多数の孔を
形成するか、通気層９に相当する部分だけシート６を取
り去れば、廃棄物層５内の水とガスとを通気層９に導入
することができる。この場合には、復水配管１４の廃棄
物層５部分をなす有孔パイプ１４ａを、図のように通気
層９と平行に設けるとよい。In the example shown in FIG. 2, since the foundation of the structure 2 is placed on the waste layer 5, a large number of sheets 6 can be formed on the sheet 6 without disposing the perforated pipe 8 as in the case of FIG. By forming the holes or removing the sheet 6 only in the portion corresponding to the ventilation layer 9, the water and gas in the waste layer 5 can be introduced into the ventilation layer 9. In this case, the perforated pipe 14a forming the waste layer 5 portion of the condensate pipe 14 may be provided in parallel with the ventilation layer 9 as shown in the figure.
【００１８】なお、揚水配管１０および復水配管１４
は、構造物２の敷地内に、例えば図３に平面図で示すよ
うに複数カ所に配置される。図４は、請求項１のガス除
去設備を公園やゴルフ場などに適用した例を示す説明図
である。その場合には、広さに応じて複数カ所に前記と
同様の通気層９を設け、各通気層９に揚水配管１０およ
び復水配管１４を対応させて設ける。The pumping pipe 10 and the condensate pipe 14
Are disposed in the site of the structure 2, for example, at a plurality of locations as shown in the plan view of FIG. FIG. 4 is an explanatory diagram showing an example in which the gas removal equipment of claim 1 is applied to a park, a golf course, or the like. In that case, the same ventilation layer 9 as described above is provided at a plurality of locations depending on the size, and a pumping pipe 10 and a condensate pipe 14 are provided corresponding to each ventilation layer 9.
【００１９】一方、請求項２のガス除去設備の一例を、
図５に示す。この例では、図１と同様に、表土層４に通
気層９が設けてあり、通気層９と廃棄物層５とを有孔パ
イプ８で連結しているが、通気層９の上部に向けて、地
上からガス取出し配管１５が施してある。このガス取出
し配管１５には吸気ポンプ１６が接続してあり、その下
流に、メタンガス等の有害ガスを濾過して回収するガス
回収装置２２が接続してある。On the other hand, an example of the gas removal equipment of claim 2 is as follows:
As shown in FIG. In this example, as in FIG. 1, a ventilation layer 9 is provided on the topsoil layer 4, and the ventilation layer 9 and the waste layer 5 are connected by a perforated pipe 8. Therefore, a pipe 15 for extracting gas from the ground is provided. An intake pump 16 is connected to the gas extraction pipe 15, and a gas recovery device 22 for filtering and recovering harmful gas such as methane gas is connected downstream of the intake pump 16.
【００２０】また、地上から廃棄物層５に向けて空気取
入れ配管１７が施され、ここに空気を送り込むための送
気ポンプ１８が接続してある。空気取入れ配管１７の廃
棄物層５内の部分には、図１と同様に、孔１７ｂを有す
る有孔パイプ１７ａを配している。吸気ポンプ１６およ
び送気ポンプ１８を作動させれば、空気取入れ配管１７
の孔１７ｂから廃棄物層５内に空気が導入され、導入さ
れた空気と共に廃棄物層５内の有害ガスが、有孔パイプ
８を通って通気層９に導入される。この通気層９内に溜
まった気体が、ガス取出し配管１５を通ってガス回収装
置２２に向かう。このガス回収装置２２において、廃棄
物層５内で発生したメタンガスなどの有害ガスを濾過し
て排気管２２ａから回収する。Further, an air intake pipe 17 is provided from the ground toward the waste layer 5, and an air supply pump 18 for supplying air is connected to the air intake pipe 17. At a portion of the air intake pipe 17 inside the waste layer 5, a perforated pipe 17a having a hole 17b is arranged as in FIG. When the intake pump 16 and the air supply pump 18 are operated, the air intake pipe 17
The air is introduced into the waste layer 5 through the hole 17b of the above, and the harmful gas in the waste layer 5 is introduced into the ventilation layer 9 through the perforated pipe 8 together with the introduced air. The gas accumulated in the ventilation layer 9 is directed to the gas recovery device 22 through the gas extraction pipe 15. In this gas recovery device 22, harmful gas such as methane gas generated in the waste layer 5 is filtered and recovered from the exhaust pipe 22a.
【００２１】請求項２では、このようにして空気を循環
させ、この空気圧により廃棄物層５中の間隙圧を保持し
ながら、地盤沈下を生じさせずに、廃棄物層で発生する
有害ガスを除去することができる。また、廃棄物層５内
にきれいな空気が送り込まれるため、廃棄物の分解速度
が速められて、ガスの発生を早期に終了させることもで
きる。In the second aspect of the present invention, the air is circulated in this way, and the air pressure keeps the pore pressure in the waste layer 5, while preventing the subsidence of the ground and removing the harmful gas generated in the waste layer. It can be removed. Moreover, since clean air is sent into the waste layer 5, the decomposition rate of the waste can be increased, and the generation of gas can be terminated early.
【００２２】なお、この例では、ガス取出し配管１５に
ガス回収装置２２を接続してあるため、廃棄物層５内の
メタンガス等を回収し、これをポンプ稼働等のエネルギ
ー源として利用することができる。また、吸気ポンプ１
６と送気ポンプ１８とを、共通の動力源で稼働させても
よい。さらに、ガス回収装置２で瀘過された後の空気
を、空気取入れ配管１７に導入してもよい。この時に
は、ガス回収装置２と空気取入れ配管１７との間を配管
で連結して、吸気ポンプ１６の排気圧により空気取入れ
配管１７への送気を行うようにすれば、吸気ポンプ１６
が送気ポンプをも兼ねるため、別個に送気ポンプ１８を
設ける必要はない。In this example, since the gas recovery device 22 is connected to the gas extraction pipe 15, it is possible to recover methane gas or the like in the waste layer 5 and use it as an energy source for pump operation or the like. it can. In addition, the intake pump 1
6 and the air supply pump 18 may be operated by a common power source. Further, the air after being filtered by the gas recovery device 2 may be introduced into the air intake pipe 17. At this time, if the gas recovery device 2 and the air intake pipe 17 are connected by a pipe and air is sent to the air intake pipe 17 by the exhaust pressure of the intake pump 16, the intake pump 16
Since it also serves as an air supply pump, it is not necessary to separately provide the air supply pump 18.
【００２３】[0023]
【発明の効果】以上説明してきたように、本発明によれ
ば、廃棄物層内に地下水が存在する場合には水を、存在
しない場合には送気ポンプにより廃棄物層内に導入され
る空気をそれぞれ循環媒体として、廃棄物層内で発生す
る有害ガスを強制的に除去することができる。この時、
廃棄物層内には水圧または空気圧が加えられるため、地
盤沈下に結びつく間隙圧の低下が生じない。また、廃棄
物層内の廃棄物や土砂の間隙に気泡として付着している
ガスを、通気層内に導入しやすくなるため、従来と比べ
て廃棄物層内のガスを効率良く除去できる。As described above, according to the present invention, when groundwater exists in the waste layer, water is introduced into the waste layer by the air pump when it does not exist. The harmful gas generated in the waste layer can be forcibly removed by using each air as a circulation medium. At this time,
Since water pressure or air pressure is applied to the waste layer, there is no decrease in the pore pressure that is associated with ground subsidence. Further, the gas adhering as bubbles in the gap between the waste material and the earth and sand in the waste layer can be easily introduced into the aeration layer, so that the gas in the waste layer can be removed more efficiently than in the conventional case.
【００２４】その結果、廃棄物埋め立て地盤を、早期に
安全なものとすることができ、土地有効利用に著しい効
果が期待できる。As a result, the waste landfill ground can be made safe at an early stage, and a significant effect can be expected for effective land use.
【図１】請求項１の一実施例を示す説明図である。FIG. 1 is an explanatory diagram showing an embodiment of claim 1;
【図２】請求項１の一実施例を示す説明図である。FIG. 2 is an explanatory diagram showing an embodiment of claim 1;
【図３】図１および図２の例における、揚水配管および
復水配管の配置の一例を示す平面図である。FIG. 3 is a plan view showing an example of arrangement of pumping pipes and condensing pipes in the examples of FIGS. 1 and 2.
【図４】請求項１の一実施例を示す説明図である。FIG. 4 is an explanatory diagram showing an embodiment of claim 1;
【図５】請求項２の一実施例を示す説明図である。FIG. 5 is an explanatory diagram showing an embodiment of claim 2;
１ 廃棄物埋め立て地盤 ３ 地表 ５ 廃棄物層 １０ 揚水配管 １１ 揚水ポンプ １２ ガス回収装置 １４ 復水配管 １５ ガス取出し配管 １６ 吸気ポンプ １７ 空気取入れ配管 １８ 送気ポンプ 1 Waste landfill ground 3 Ground surface 5 Waste layer 10 Pumping pipe 11 Pumping pump 12 Gas recovery device 14 Condensate pipe 15 Gas extraction pipe 16 Intake pump 17 Air intake pipe 18 Air pump
Claims (2)
棄物層内のガスが水と共に導入される通気層を設け、こ
の通気層に揚水ポンプ付きの揚水配管を施すとともに、
この揚水配管にガス回収装置を接続し、このガス回収装
置の下流に、廃棄物層に達する復水配管を設けたことを
特徴とする廃棄物埋め立て地盤からのガス除去設備。1. An aeration layer for introducing gas in a waste layer together with water is provided in the vicinity of the ground surface in the waste landfill ground, and a pumping pipe with a pumping pump is provided on the aeration layer,
A gas removal device from waste landfill ground, characterized in that a gas recovery device is connected to the pumping pipe, and a condensate pipe reaching the waste layer is provided downstream of the gas recovery device.
棄物層内のガスが導入される通気層を設け、この通気層
に吸気ポンプ付きのガス取出し配管を設ける一方、地上
から廃棄物層に達する空気取入れ配管を施し、この空気
取入れ配管に送気ポンプを設けたことを特徴とする廃棄
物埋め立て地盤からのガス除去設備。2. A ventilation layer for introducing gas in the waste layer is provided near the ground surface in the waste landfill ground, and a gas extraction pipe with an intake pump is provided in the ventilation layer, while the waste layer is disposed from the ground. A facility for removing gas from landfills of waste, which is characterized in that an air intake pipe reaching up to is installed and an air supply pump is provided in this air intake pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1537492A JP3216726B2 (en) | 1992-01-30 | 1992-01-30 | Gas removal equipment from waste landfill ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1537492A JP3216726B2 (en) | 1992-01-30 | 1992-01-30 | Gas removal equipment from waste landfill ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05208181A true JPH05208181A (en) | 1993-08-20 |
| JP3216726B2 JP3216726B2 (en) | 2001-10-09 |
Family
ID=11887004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1537492A Expired - Fee Related JP3216726B2 (en) | 1992-01-30 | 1992-01-30 | Gas removal equipment from waste landfill ground |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3216726B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100353301B1 (en) * | 2000-10-04 | 2002-09-18 | 한국철도기술연구원 | Switching system for remediation of contaminated soil |
| JP2013046896A (en) * | 2011-07-24 | 2013-03-07 | Kowatec Co Inc | Method for treating waste |
| CN103046535A (en) * | 2012-12-31 | 2013-04-17 | 中铁第四勘察设计院集团有限公司 | Underground harmful gas discharger |
| CN103541346A (en) * | 2013-11-06 | 2014-01-29 | 吉林大学 | Underground water artificial recharge suspended matter blocking treatment method based on air flow circulation |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001358578A (en) | 2000-06-15 | 2001-12-26 | Fujitsu Ltd | Pass transistor circuit, its designing method, logical circuit optimization unit, logical circuit optimization method and computer readable medium recording logical circuit optimization program |
-
1992
- 1992-01-30 JP JP1537492A patent/JP3216726B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100353301B1 (en) * | 2000-10-04 | 2002-09-18 | 한국철도기술연구원 | Switching system for remediation of contaminated soil |
| JP2013046896A (en) * | 2011-07-24 | 2013-03-07 | Kowatec Co Inc | Method for treating waste |
| CN103046535A (en) * | 2012-12-31 | 2013-04-17 | 中铁第四勘察设计院集团有限公司 | Underground harmful gas discharger |
| CN103046535B (en) * | 2012-12-31 | 2015-11-11 | 中铁第四勘察设计院集团有限公司 | Underground pernicious gas discharger |
| CN103541346A (en) * | 2013-11-06 | 2014-01-29 | 吉林大学 | Underground water artificial recharge suspended matter blocking treatment method based on air flow circulation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3216726B2 (en) | 2001-10-09 |
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