JP5340703B2 - Heat generation and combustion prevention methods at waste landfills - Google Patents

Heat generation and combustion prevention methods at waste landfills Download PDF

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JP5340703B2
JP5340703B2 JP2008296454A JP2008296454A JP5340703B2 JP 5340703 B2 JP5340703 B2 JP 5340703B2 JP 2008296454 A JP2008296454 A JP 2008296454A JP 2008296454 A JP2008296454 A JP 2008296454A JP 5340703 B2 JP5340703 B2 JP 5340703B2
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JP2010119961A (en
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良平 西村
靖訓 田中
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株式会社鴻池組
リマテック株式会社
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本発明は、廃棄物埋立地における発熱・燃焼防止方法に関し、特に、埋め立てられた廃棄物に含まれる無機及び有機成分の酸化による発熱・燃焼を抑制して、火災やダイオキシン類等の有害物質の発生を防止するようにした廃棄物埋立地における発熱・燃焼防止方法に関するものである。   The present invention relates to a method for preventing heat generation and combustion at a landfill site, and in particular, suppresses heat generation and combustion due to oxidation of inorganic and organic components contained in landfilled waste, thereby preventing harmful substances such as fire and dioxins. The present invention relates to a method for preventing heat generation and combustion in a landfill where waste is prevented.

従来、生活系のゴミは一般廃棄物として自治体が中間処理や最終埋立処分し、一方、事業活動から発生する廃棄物は産業廃棄物として原則的に民間の処分業者が中間処理や最終埋立処分を行うようにしている。このため、一般廃棄物の最終処分場及び産業廃棄物の管理型最終処分場には、多種多様な廃棄物が埋め立てられる。これらの埋め立てられた廃棄物は、廃棄物に含まれる無機及び有機成分の酸化により発熱し、廃棄物の種類(例えば、埋め立てる際に十分な中間処理を行わずに不法投棄された廃棄物等)や環境条件によっては温度がさらに上昇して燃焼し、火災やダイオキシン類等の有害物質が発生するという問題があった。   Traditionally, municipal wastes are treated as general waste by intermediate treatment and final landfill, while waste generated from business activities is treated as industrial waste by private disposal companies in principle by intermediate treatment and final landfill. Like to do. For this reason, a wide variety of waste is landfilled in the final disposal site for general waste and the managed final disposal site for industrial waste. These landfill wastes generate heat due to the oxidation of inorganic and organic components contained in the waste, and the type of waste (for example, waste illegally dumped without sufficient intermediate treatment when landfilling) Depending on the environmental conditions, there is a problem that the temperature further rises and burns, generating harmful substances such as fires and dioxins.

ところで、このような廃棄物埋立地(本明細書において、一般廃棄物の最終処分場及び産業廃棄物の管理型最終処分場のほか、廃棄物が不法投棄された場所を含む。)における廃棄物の発熱や燃焼を防止する手段として、地表面から水を散布したり、埋め立てられた廃棄物層に注水管を配設し、この注水管から廃棄物層に対して水を注入することが考えられるが、十分な廃棄物の発熱・燃焼防止効果を得るためには、水の浸透性能を考慮して、多量の水を散布又は注入する必要や、さらに、廃棄物層に対して高密度に注水管を配設する必要があり、このため、コスト上の問題に加え、注入した水の後処理(浸透水の処理)の問題が新たに生じるという問題があった。   By the way, the waste in such a waste landfill (in this specification, including the final disposal site for general waste and the managed final disposal site for industrial waste, as well as the place where waste was illegally dumped). As a means to prevent heat generation and combustion of water, it is considered that water is sprayed from the ground surface, or a water injection pipe is disposed in the landfilled waste layer, and water is injected from this water injection pipe into the waste layer. However, in order to obtain a sufficient heat generation / combustion prevention effect, it is necessary to spray or inject a large amount of water in consideration of the water penetration performance, and to increase the density of the waste layer. In addition to the problem of cost, there was a problem that a new problem of post-treatment of injected water (treatment of permeated water) occurred.

本発明は、上記の廃棄物埋立地における廃棄物の発熱・燃焼の問題点に鑑み、コスト上の問題や水の後処理(浸透水の処理)の問題を解消しながら、埋め立てられた廃棄物に含まれる無機及び有機成分の酸化による発熱・燃焼を抑制して、火災やダイオキシン類等の有害物質の発生を防止することができるようにした廃棄物埋立地における発熱・燃焼防止方法を提供することを目的とする。   In view of the problem of waste heat generation and combustion in the above-mentioned waste landfill, the present invention solves the problem of cost and the problem of water aftertreatment (treatment of permeate), To prevent heat and combustion caused by oxidation of inorganic and organic components contained in, and prevent generation of harmful substances such as fires and dioxins, etc. For the purpose.

上記目的を達成するため、本発明の廃棄物埋立地における発熱・燃焼防止方法は、埋め立てられた廃棄物層の発熱部位に、削孔を行い、注水管及び注気管を配設し、該注水管及び注気管から廃棄物層に対して水及び水蒸気の注入を併用して行う廃棄物埋立地における発熱・燃焼防止方法であって、前記注水管の削孔をインナーロッドにて送水しながら、削孔水及び噴出ガスをインナーロッドとアウターロッドの間隙を通って削孔機排出口へ誘導する二重管削孔方式で行い、誘導した削孔水及び噴出ガスを処理施設で処理するようにするとともに、前記水蒸気の注入を、ボイラで発生させた0.2〜1.0MPaの加圧水蒸気を前記注気管に供給して行うことを特徴とする。 In order to achieve the above object, the heat generation / combustion prevention method in the waste landfill of the present invention performs drilling in the heat generation site of the landfilled waste layer, and arranges the water injection pipe and the air injection pipe, A heat generation / combustion prevention method in a waste landfill that uses water and water vapor injection from a water pipe and an air intake pipe to a waste layer in combination, while watering the hole in the water injection pipe with an inner rod, It performed a double pipe drilling system the drilling water and the gas injected through the gap of the inner rod and outer rod guiding the drilling machine outlet, induced the boring water and gas discharged to process in the process facility In addition, the steam is injected by supplying pressurized steam of 0.2 to 1.0 MPa generated by a boiler to the air inlet tube .

この場合において、前記注気管の削孔を廃棄物層の発熱部位に対する側方の法面より行うことができる。   In this case, drilling of the air inlet tube can be performed from a lateral slope with respect to the heat generation portion of the waste layer.

本発明の廃棄物埋立地における発熱・燃焼防止方法によれば、水による直接的な消火(注入した水による廃棄物層の温度を低下させる作用及び廃棄物層に含まれる空気(酸素)を水と置換することによる消火)と水蒸気による間接的な消火(廃棄物層に含まれる空気(酸素)を水蒸気と置換することによる消火)によって、埋め立てられた廃棄物に含まれる無機及び有機成分の酸化による発熱・燃焼を抑制して、火災やダイオキシン類等の有害物質の発生を防止することができる。
この場合、浸透性能の高い水蒸気の作用によって、埋め立てられた廃棄物の発熱・燃焼を効率的かつ広範囲に抑制することができるため、廃棄物層に対する注水管の配設密度や水の注入量を低減することができ、コストを低廉にできることに加え、注入した水の後処理(浸透水の処理)の問題を解消することができる。
According to the heat generation / combustion prevention method in the waste landfill of the present invention, direct fire extinguishing with water (the action of lowering the temperature of the waste layer by the injected water and the air (oxygen) contained in the waste layer as water) Oxidation of inorganic and organic components in landfilled waste by fire extinguishing by substituting for water and indirect fire extinguishing by water vapor (extinguishing by replacing air (oxygen) contained in the waste layer with water vapor) The generation of harmful substances such as fires and dioxins can be prevented by suppressing the heat generation and combustion caused by.
In this case, heat generation and combustion of the landfilled waste can be efficiently and widely suppressed by the action of water vapor having high permeation performance. In addition to being able to reduce the cost, the problem of post-treatment of the injected water (treatment of permeated water) can be solved.

そして、埋め立てられた廃棄物層の発熱部位に、削孔を行い、注水管及び注気管を配設することにより、埋め立てられた廃棄物層の発熱部位を重点的に消火することができる。   Then, by drilling holes in the heat generation part of the landfilled waste layer and disposing the water injection pipe and the air injection pipe, the heat generation part of the landfilled waste layer can be intensively extinguished.

以下、本発明の廃棄物埋立地における発熱・燃焼防止方法の実施の形態を、図面に基づいて説明する。   Embodiments of the heat generation / combustion prevention method in the waste landfill of the present invention will be described below with reference to the drawings.

図1〜図4に、本発明の廃棄物埋立地における発熱・燃焼防止方法の一実施例を示す。   1 to 4 show an embodiment of the heat generation / combustion prevention method in the waste landfill of the present invention.

図1に、この廃棄物埋立地における発熱・燃焼防止方法の基本フローを示す。
発熱・燃焼防止方法の具体的な工程は以下のとおりである。
(1)埋め立てられた廃棄物層の発熱部位を調査し、当該発熱部位に地表面から削孔を行い、注水管を配設する。
この場合、埋め立てられた廃棄物層の発熱部位の調査は、例えば、観測孔の削孔を行い、観測孔に挿入した熱電対で測定する等、任意の方法で測定することができる。
(2)同様に、発熱部位に側方の法面より削孔を行い、注気管を配設する。
(3)注水管及び注気管を介して、廃棄物層に対して水及び水蒸気の注入を行う。
(4)発熱部位の温度低下及び燃焼ガスの圧力・濃度の低下の確認を行う。
(5)必要に応じて、(1)〜(4)の工程を繰り返す。
(6)温度再上昇の有無の確認を行う。
(7)再燃焼による温度の再上昇がある場合は、(1)〜(4)の工程を繰り返し、温度の再上昇がない場合は、消火と認定とする。
(8)消火認定後はモニタリングを継続的に実施する。
(9)再燃焼による温度の再上昇がある場合は、(1)〜(4)の工程を繰り返す。
FIG. 1 shows a basic flow of a heat generation / combustion prevention method in this waste landfill.
The specific steps of the heat generation / combustion prevention method are as follows.
(1) Examine the heat generation part of the landfilled waste layer, drill a hole in the heat generation part from the ground surface, and install a water injection pipe.
In this case, the investigation of the heat generation site of the landfilled waste layer can be performed by any method, for example, drilling the observation hole and measuring with a thermocouple inserted into the observation hole.
(2) Similarly, a hole is drilled in the heat generating portion from the side slope, and an air supply tube is disposed.
(3) Water and water vapor are injected into the waste layer through the water injection pipe and the air injection pipe.
(4) Confirm the temperature drop of the heat generation part and the pressure / concentration drop of the combustion gas.
(5) The steps (1) to (4) are repeated as necessary.
(6) Check for temperature rise.
(7) When there is a temperature rise due to recombustion, the steps (1) to (4) are repeated.
(8) Continue monitoring after certification for fire fighting.
(9) When there is a temperature rise due to recombustion, the steps (1) to (4) are repeated.

図2に、削孔方式の概念図を示す。
削孔及び注水管の配設は、より具体的には、以下の工程で行う。
(1)削孔は、クローラータイプのロータリーパーカッションドリルを使用し、二重管削孔方式で行う。
(2)二重管削孔方式は、インナーロッドにて送水し、削孔水はアウターロッドの内側を通って削孔機械に返水される内返し方式であり、廃棄物層内部の燃焼による熱水や噴出ガスはインナーロッドとアウターロッドの間隙を通って削孔機排出口へ誘導されることで削孔時の安全性が確保できる。
(3)誘導した熱水や噴出ガスは、排水気口より気液分離槽へ送致し、ガスは活性炭吸着槽を経て有害物を吸着処理した後、大気放出、液体は分離槽より浸出汚濁水処理施設へ排水する。
(4)気液分離槽の手前に切替バルブを設置し、ガス圧測定器(オリフィス)にて噴出ガスのガス圧力を測定し、安全確認を行いながら作業を実施する。
(5)可燃性ガス濃度が高い場合は、ロッドの継足し時の金属接触で着火のおそれがあるため、作業場所周辺にミストを噴霧しながら作業を実施する。
(6)1日の作業サイクルは「機械セット⇒削孔・水の注入⇒安全な所へ移動後終了」とし、途中で作業を終了しない。
(7)作業が終了しない場合は、ロッドの抑留や地盤の陥没などの危険回避のため、ロッドを切り離し、機械を安全な場所に移動し、翌日ジョイントし削孔を再開する。
(8)削孔作業は、回転トルク、フィード圧、削孔スピード、水の注入圧力などから地中の空洞を想定しながら実施することとし、陥没やガス噴出等によるリスクの低減に努める。
(9)削孔機械は、垂直から水平削孔まで自由に削孔角度を設定することが可能であり、地盤の陥没などの危険が想定される場合などは、消火注水範囲に向け安全な場所からの斜向削孔を行う。
(10)削孔水は、浸出汚濁水を浸出汚濁水処理設備及び消火水処理設備で浄化された「処理水」を、給水池まで揚水して循環使用することが好ましい。
FIG. 2 shows a conceptual diagram of the drilling method.
More specifically, the hole drilling and the water injection pipe are arranged in the following steps.
(1) Drilling is performed by a double tube drilling method using a crawler type rotary percussion drill.
(2) The double-pipe drilling system is an internal turning system in which water is fed by the inner rod, and the drilling water is returned to the drilling machine through the inner side of the outer rod. Hot water and jet gas are guided to the drilling machine outlet through the gap between the inner rod and the outer rod, thereby ensuring safety during drilling.
(3) The induced hot water and jet gas are sent to the gas-liquid separation tank through the drainage vent, the gas is adsorbed to harmful substances through the activated carbon adsorption tank, and then released into the atmosphere, and the liquid is leached from the separation tank. Drain to treatment facility.
(4) Install a switching valve in front of the gas-liquid separation tank, measure the gas pressure of the jet gas with a gas pressure measuring device (orifice), and carry out the work while confirming safety.
(5) If the flammable gas concentration is high, there is a risk of ignition due to metal contact when the rod is added, so work is performed while spraying mist around the work place.
(6) The daily work cycle is “machine set ⇒ drilling / water injection ⇒ finished after moving to a safe place” and the work is not finished halfway.
(7) If the work does not end, cut the rod, move the machine to a safe place, and resume the drilling the next day to avoid dangers such as rod detention and ground collapse.
(8) The drilling operation will be carried out assuming a hollow in the ground based on the rotational torque, feed pressure, drilling speed, water injection pressure, etc., and efforts will be made to reduce the risk of depression and gas ejection.
(9) The drilling machine can set the drilling angle freely from vertical to horizontal drilling, and when there is a risk of ground collapse, etc., it is a safe place for fire extinguishing water injection range. Diagonal drilling from.
(10) As the drilling water, it is preferable to circulate and use the “treated water” purified by the leached polluted water treatment facility and the fire-extinguishing water treatment facility after leaching the polluted water.

図3に、水の注入による消火作業の概念図を示す。
水の注入による消火作業手順は、より具体的には、以下の工程で行う。
(1)事前の消火試験結果に基づき、削孔機械の配置、水の注入間隔、注水管1の本数、進行順を再検討し、削孔深度のスピードや水の注入量等を管理する。
この場合、注水管1(1a)は、例えば、下端を開口した管部材のほか、周面に多数の注水孔を形成した管部材を使用することができ、平面視して数m間隔で千鳥配置とし、消火対象の廃棄物と同程度の量の水を注入するようにし、注入した水による廃棄物層の温度を低下させる作用及び廃棄物層に含まれる空気(酸素)を水と置換することにより消火を行うようにする。
(2)消火範囲の周辺の低温部から高温部へ水の注入による消火を行う。
(3)水の注入は、廃棄物層中にできるだけ均等に浸透するようにロッドを回転させながら行い、流量計にて水の注入量を確認しながら、削孔・水の注入を繰り返し行う。
(4)所定深度まで到達し、所定の水の注入量を確認した段階を水の注入を完了とする。
(5)温度再上昇時の再度の水の注入のため、100℃以上の高温部には再度注水管1aを挿入し、周囲を砂で埋め戻すこととする。
(6)再度配設する注水管1aの天端2.0mは、ガス噴出が発生しないように管外周をモルタルでキャッピングする。
(7)再度配設する注水管1aの本数については、消火試験結果とモニタリング孔の測定結果に基づいて決定することとし、再度注水管1aを挿入しない孔は、砂で埋め戻し同様にキャッピングを行う。
(8)注入した水の後処理(浸透水の処理)を、通常の浸透水の処理に準拠して行う。
In FIG. 3, the conceptual diagram of the fire extinguishing operation | work by injection | pouring of water is shown.
More specifically, the fire fighting operation procedure by water injection is performed in the following steps.
(1) Based on the results of the previous fire extinguishing test, review the layout of the drilling machine, the water injection interval, the number of water injection pipes 1 and the order of progress, and manage the speed of drilling depth, the amount of water injected, and the like.
In this case, for the water injection pipe 1 (1a), for example, a pipe member having a large number of water injection holes formed on the peripheral surface can be used in addition to a pipe member having an open lower end. Arrangement is made so that the same amount of water as the waste to be extinguished is injected, the temperature of the waste layer is lowered by the injected water, and the air (oxygen) contained in the waste layer is replaced with water. Extinguish the fire.
(2) Fire extinguishing is performed by injecting water from the low temperature part around the fire extinguishing range to the high temperature part.
(3) Water injection is performed while rotating the rod so as to penetrate into the waste layer as evenly as possible, and repeatedly injecting holes and water while checking the amount of water injected with a flow meter.
(4) Water injection is completed when a predetermined depth is reached and a predetermined amount of water is confirmed.
(5) In order to inject water again when the temperature rises again, the water injection pipe 1a is inserted again in the high temperature part of 100 ° C. or higher, and the surroundings are backfilled with sand.
(6) The top end 2.0m of the water injection pipe 1a to be disposed again is capped with a mortar on the outer periphery of the pipe so that no gas ejection occurs.
(7) The number of water injection pipes 1a to be re-installed shall be determined based on the results of the fire extinguishing test and the measurement results of the monitoring holes, and the holes where the water injection pipes 1a are not inserted again are capped similarly to the backfilling with sand. Do.
(8) Post-treatment of the injected water (treatment of osmotic water) is performed in accordance with normal osmotic water treatment.

図4に、水蒸気の注入による消火作業の概念図を示す。
水蒸気の注入による消火作業手順は、より具体的には、以下の工程で行う。
(1)廃棄物層の発熱部位に対して、側方の法面より削孔を行い、注気管2を配設し、発熱部位の下部よりボイラで発生させた水蒸気を注入する。
この場合、注気管2は、例えば、周面に多数の注気孔を形成した管部材を使用し、廃棄物層の発熱部位に対して、複数本ずつ挿入し、加圧水蒸気(例えば、0.2〜1.0MPa、より好ましくは、0.3〜0.5MPa程度の水蒸気)を、各注気管2に供給(例えば、0.2〜1.0t/h、より好ましくは、0.3〜0.5t/h程度の量を供給)して、廃棄物層に水蒸気を拡散させて廃棄物層に含まれる空気(酸素)を水蒸気と広範囲に亘って置換することにより消火を行うようにする。
In FIG. 4, the conceptual diagram of the fire extinguishing operation | work by injection | pouring of water vapor | steam is shown.
More specifically, the fire extinguishing work procedure by injecting water vapor is performed in the following steps.
(1) The heat generation part of the waste layer is drilled from the side slope, the air inlet tube 2 is disposed, and the steam generated by the boiler is injected from the lower part of the heat generation part.
In this case, the air inlet tube 2 uses, for example, a pipe member in which a large number of air inlet holes are formed on the peripheral surface, and a plurality of air inlets are inserted into the heat generation portion of the waste layer, and pressurized water vapor (for example, 0.2 To 1.0 MPa, more preferably about 0.3 to 0.5 MPa of water vapor) is supplied to each air inlet tube 2 (for example, 0.2 to 1.0 t / h, more preferably 0.3 to 0). The amount of water supplied is about 5 t / h), and the water vapor is diffused in the waste layer and the air (oxygen) contained in the waste layer is replaced with water vapor over a wide range so that the fire is extinguished.

消火の確認は、より具体的には、以下のように行う。
(1)水及び水蒸気の注入後、ロッド内に孔内測定用温度計を孔底まで下げ、温度測定を実施する。周辺の70℃〜100℃域は注入完了時と1時間後の温度低下の確認を行い、100℃以上の高温域は、注入完了時と1時間毎に6時間後までと翌朝の測定を行い、温度低下の確認を行う。
(2)モニタリング孔の温度変化を監視し、温度上昇のないことを確認する。
(3)燃焼ガスの圧力・濃度を測定し、温度と燃焼ガスの圧力・濃度低下の確認を行う。(4)さらに、注気管2より圧縮空気を注入し、温度の再上昇がないかどうかを確認し、消火確認とする。
More specifically, fire extinguishing is confirmed as follows.
(1) After injecting water and water vapor, the thermometer for in-hole measurement is lowered to the bottom of the hole in the rod, and the temperature is measured. The surrounding temperature range of 70 ° C to 100 ° C is checked for temperature drop after completion of injection and 1 hour later, and the high temperature range of 100 ° C and higher is measured on the next morning until 6 hours after completion of injection and every hour. Confirm the temperature drop.
(2) Monitor the temperature change in the monitoring hole and confirm that there is no temperature rise.
(3) Measure the pressure / concentration of the combustion gas and confirm the temperature and pressure / concentration drop of the combustion gas. (4) Further, compressed air is injected from the air inlet tube 2 to check whether or not the temperature has risen again and fire extinction is confirmed.

温度再上昇時の対処は、より具体的には、以下のように行う。
(1)例えば、25×25mに1箇所の温度計測監視モニタリング孔を設置する。
(2)測定データは、携帯電話回線を利用して現場事務所の監視用パソコンへ送信し、現場事務所で受信したデータを解析し、地中温度の監視を行う。
(3)モニタリング孔で温度再上昇が感知された場合は、水の注入完了後に設置した注水管1aを介して再度水の注入を行うとともに、温度上昇地点に最も近い位置にある注気管2を介して水蒸気の注入を行う。
(4)温度低下及び燃焼ガスの圧力・濃度低下を確認するまで継続して水及び水蒸気の注入を行う。
(5)十分な温度低下が得られない場合は、近接する位置にて再度削孔を行い、注水管1及び注気管2を配設して水及び水蒸気の注入を行う。
More specifically, the countermeasure when the temperature rises again is performed as follows.
(1) For example, one temperature measurement monitoring monitoring hole is installed at 25 × 25 m.
(2) The measurement data is transmitted to a monitoring personal computer at the field office using a mobile phone line, the data received at the field office is analyzed, and the underground temperature is monitored.
(3) When temperature rise is detected in the monitoring hole, water is injected again through the water injection pipe 1a installed after the completion of water injection, and the air inlet pipe 2 located closest to the temperature rise point is connected. The steam is injected through.
(4) Water and water vapor are continuously injected until the temperature drop and the pressure / concentration drop of the combustion gas are confirmed.
(5) When a sufficient temperature drop cannot be obtained, drilling is performed again at a close position, and the water injection pipe 1 and the air injection pipe 2 are provided to inject water and water vapor.

ところで、この実施例においては、埋め立てられた廃棄物層に、注水管1及び注気管2を配設し、該注水管1及び注気管2から廃棄物層に対して水及び水蒸気の注入を行うことにより、水による直接的な消火(注入した水による廃棄物層の温度を低下させる作用及び廃棄物層に含まれる空気(酸素)を水と置換することによる消火)と水蒸気による間接的な消火(廃棄物層に含まれる空気(酸素)を水蒸気と置換することによる消火)とを併用することによって、埋め立てられた廃棄物に含まれる無機及び有機成分の酸化による発熱・燃焼を抑制して、火災やダイオキシン類等の有害物質の発生を防止するようにしているが、廃棄物の種類や環境条件によっては、必要に応じて、いずれか一方の消火方法のみを採用すること(参考例)ができる。   By the way, in this embodiment, the water injection pipe 1 and the air injection pipe 2 are disposed in the landfilled waste layer, and water and water vapor are injected from the water injection pipe 1 and the air injection pipe 2 into the waste layer. Therefore, direct fire extinguishing with water (the action of lowering the temperature of the waste layer due to the injected water and fire extinguishing by replacing the air (oxygen) contained in the waste layer with water) and indirect fire extinguishing with water vapor By using together with (extinguishing by replacing air (oxygen) contained in the waste layer with water vapor), heat generation and combustion due to oxidation of inorganic and organic components contained in landfilled waste are suppressed, We try to prevent the generation of harmful substances such as fire and dioxins, but depending on the type of waste and the environmental conditions, it is possible to adopt only one of the fire extinguishing methods as necessary (reference example) Can .

また、この実施例においては、注水管1を鉛直方向に配設することにより、注水管1の周囲の廃棄物層の発熱部位を重点的に消火するとともに、注気管2を水平方向に(又は傾斜させて)配設することにより、注入した水蒸気に横方向への推力を与えることができ、埋め立てられた廃棄物の発熱・燃焼を効率的かつ広範囲に抑制することができるようにしているが、注水管1及び注気管2の配設方向は、これに限定されず、例えば、両者を、鉛直方向に配設したり、水平方向に配設するほか、傾斜させて(先端側を上方傾斜させたり、下方傾斜させる。)配設することもできる。   Further, in this embodiment, by arranging the water injection pipe 1 in the vertical direction, the exothermic part of the waste layer around the water injection pipe 1 is intensively extinguished and the air injection pipe 2 is set in the horizontal direction (or By arranging (inclined), it is possible to give a lateral thrust to the injected steam, and to efficiently and widely suppress the heat generation and combustion of the landfilled waste. The arrangement direction of the water injection pipe 1 and the air injection pipe 2 is not limited to this. For example, both the water injection pipe 1 and the air injection pipe 2 are arranged in the vertical direction, arranged in the horizontal direction, or inclined (the tip side is inclined upward). Or inclined downward).

また、この実施例においては、埋め立てられた廃棄物層の発熱部位を調査し、当該発熱部位に削孔を行い、注水管1及び注気管2を配設することにより、埋め立てられた廃棄物層の発熱部位を重点的に消火することができるようにしているが、注水管1及び注気管2の配設方法は、削孔による方法に限定されず、また、廃棄物の埋め立てに際して予め注水管1及び注気管2を配設するようにすることもできる。
さらに、注水管1及び注気管2を新たに配設することに代えて、廃棄物埋立地に既に配設されている既存の排気管路や集水管路を利用することができる。
Further, in this embodiment, the heat generation site of the landfilled waste layer is investigated, a hole is drilled in the heat generation site, and the water injection pipe 1 and the air injection pipe 2 are provided, so that the landfill waste layer is disposed. However, the arrangement method of the water injection pipe 1 and the air injection pipe 2 is not limited to the drilling method, and the water injection pipe is preliminarily used when the waste is landfilled. 1 and the air inlet tube 2 may be provided.
Furthermore, instead of newly arranging the water injection pipe 1 and the air injection pipe 2, it is possible to use existing exhaust pipes and water collection pipes that are already installed in the waste landfill.

以上、本発明の廃棄物埋立地における発熱・燃焼防止方法について、その実施例に基づいて説明したが、本発明は上記実施例に記載した構成に限定されるものではなく、その趣旨を逸脱しない範囲において適宜その構成を変更することができるものである。   As mentioned above, although the heat_generation | fever / combustion prevention method in the waste landfill of this invention was demonstrated based on the Example, this invention is not limited to the structure described in the said Example, and does not deviate from the meaning. The configuration can be changed as appropriate within the range.

本発明の廃棄物埋立地における発熱・燃焼防止方法は、コスト上の問題や水の後処理(浸透水の処理)の問題を解消しながら、埋め立てられた廃棄物に含まれる無機及び有機成分の酸化による発熱・燃焼を抑制して、火災やダイオキシン類等の有害物質の発生を防止することができることから、不法投棄されて埋め立てられた廃棄物の発熱や燃焼を防止する用途に好適に用いることができるほか、例えば、一般廃棄物の最終処分場や産業廃棄物の管理型最終処分場における埋め立てられた廃棄物の発熱や燃焼を防止する用途にも用いることができる。   The heat generation / combustion prevention method in the waste landfill of the present invention eliminates the problem of cost and the problem of post-treatment of water (treatment of permeated water), while the inorganic and organic components contained in the landfill waste. Because it can prevent the generation of harmful substances such as fire and dioxins by suppressing heat generation and combustion due to oxidation, it should be used suitably for applications that prevent the heat and combustion of waste dumped illegally and landfilled In addition, for example, it can be used for the purpose of preventing heat generation and combustion of landfilled waste in a final disposal site for general waste and a managed final disposal site for industrial waste.

本発明の廃棄物埋立地における発熱・燃焼防止方法の一実施例を示す基本フローを示す図である。It is a figure which shows the basic flow which shows one Example of the heat_generation | fever / combustion prevention method in the waste landfill of this invention. 削孔方式の概念図である。It is a conceptual diagram of a drilling system. 水の注入による消火の概念図である。It is a conceptual diagram of fire extinguishing by water injection. 水蒸気の注入による消火の概念図である。It is a conceptual diagram of fire extinguishing by injection | pouring of water vapor | steam.

1 注水管
1a 注水管
2 注気管
1 Water supply pipe 1a Water supply pipe 2 Air supply pipe

Claims (2)

埋め立てられた廃棄物層の発熱部位に、削孔を行い、注水管及び注気管を配設し、該注水管及び注気管から廃棄物層に対して水及び水蒸気の注入を併用して行う廃棄物埋立地における発熱・燃焼防止方法であって、前記注水管の削孔をインナーロッドにて送水しながら、削孔水及び噴出ガスをインナーロッドとアウターロッドの間隙を通って削孔機排出口へ誘導する二重管削孔方式で行い、誘導した削孔水及び噴出ガスを処理施設で処理するようにするとともに、前記水蒸気の注入を、ボイラで発生させた0.2〜1.0MPaの加圧水蒸気を前記注気管に供給して行うことを特徴とする廃棄物埋立地における発熱・燃焼防止方法。 Disposal by drilling holes in the heat generation part of the landfilled waste layer, installing water injection pipes and air injection pipes, and injecting water and water vapor from the water injection pipes and air injection pipes into the waste layer together A heat generation / combustion prevention method in a landfill site, in which the water drilling water and the jet gas are passed through the gap between the inner rod and the outer rod while the water drilling hole is fed by the inner rod. The double-pipe drilling system that guides to the water, and the induced drilling water and the jet gas are processed in the treatment facility, and the steam injection is 0.2 to 1.0 MPa generated in the boiler. A method for preventing heat generation and combustion in a waste landfill , wherein pressurized steam is supplied to the air inlet pipe . 前記注気管の削孔を廃棄物層の発熱部位に対する側方の法面より行うことを特徴とする請求項1記載の廃棄物埋立地における発熱・燃焼防止方法。   2. A method for preventing heat generation and combustion in a waste landfill according to claim 1, wherein the air pipe is drilled from a side surface with respect to a heat generation portion of the waste layer.
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