JP2004223418A - Method and apparatus for treating contaminant - Google Patents

Method and apparatus for treating contaminant Download PDF

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Publication number
JP2004223418A
JP2004223418A JP2003014779A JP2003014779A JP2004223418A JP 2004223418 A JP2004223418 A JP 2004223418A JP 2003014779 A JP2003014779 A JP 2003014779A JP 2003014779 A JP2003014779 A JP 2003014779A JP 2004223418 A JP2004223418 A JP 2004223418A
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JP
Japan
Prior art keywords
heat storage
organic volatile
combustion chamber
contaminants
combustion
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JP2003014779A
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Japanese (ja)
Inventor
Toshio Shimada
利生 嶋田
Morihiko Imada
守彦 今田
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Chugai Ro Co Ltd
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Chugai Ro Co Ltd
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Priority to JP2003014779A priority Critical patent/JP2004223418A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent dioxins from being produced in the case of treating contaminants such as soil containing organic volatile materials such as oils, and to efficiently treat the contaminants. <P>SOLUTION: In two heat storage combustion chambers 10a and 10b equipped with heat storage sections 12a and 12b packed with heat storage materials 11a and 11b and combustion gas devices 13a and 13b, water is supplied to one heat storage combustion chamber in which the heat storage materials are heated to obtain steam. The steam is supplied to a treating vessel 20, into which the contaminants containing the volatile materials are supplied, to liberate organic materials from the contaminants. The contaminants are separated to the organic materials O and the water W in a separator 22, and the separated organic materials are introduced into the other heat storage combustion chambers and are burned. The waste combustion gas is brought into direct contact with the heat storage material in the heat storage section and is cooled by a heat exchange and is then discharged. The above operations are alternately carried out in the two heat storage combustion chambers. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
この発明は、油等の有機揮発物質を含む土壌等の汚染物を処理する汚染物の処理方法及び処理装置に係り、特に、ダイオキシンの発生を防止すると共に、汚染物を効率よく処理できるようにした点に特徴を有するものである。
【0002】
【従来の技術】
近年、ガソリンスタンド跡地における土壌のように、油等の有機揮発物質を含む汚染物を処理して、油等の有機揮発物質を除去させることが行われるようになった。
【0003】
ここで、上記のような油等の有機揮発物質を含む土壌等の汚染物を処理するにあたり、従来においては、図1に示すように、汚染物(図示せず)をロータリーキルン1内に供給し、このロータリーキルン1内において上記の汚染物を加熱させて、この汚染物中に含まれる油等の有機揮発物質を気化させ、このように気化された有機揮発物質のガスを、案内管2を通して燃焼室3内に導くようにしている。
【0004】
そして、上記の有機揮発物質のガスをこの燃焼室3内においてバーナ等の燃焼装置4により燃焼させると共に、水供給管5を通して燃焼室3内に水を導き、この水を燃焼室3内に設けられた配管(図示せず)を通して上記の燃焼後の排ガスと熱交換させ、上記の排ガスを冷却させて煙突6から排出させる一方、熱交換されて加熱された水蒸気や水を燃焼室3から排出管7を通して外部に取り出し、これを発電や給湯に利用するようにしていた。
【0005】
ここで、上記のように汚染物を処理する場合において、汚染物に含まれる油等の有機揮発物質は汚染物に含まれる塩素と反応してダイオキシンが発生し、このダイオキシンは800℃以上の温度で2秒以上保持させると分解されるが、冷却時に200℃以上の温度域に0.2秒以上保持されると再合成されるという特性がある。
【0006】
そして、上記のように有機揮発物質のガスを燃焼室3内においてバーナ等の燃焼装置4により燃焼させると、発生したダイオキシンが一度は分解されるが、上記のように水を燃焼室3内に設けられた配管を通して燃焼後の排ガスと熱交換させる場合、熱交換効率が悪くなって、排ガスを十分に冷却させるのに時間がかかり、分解されたダイオキシンの一部が再合成されて、排ガスと一緒に煙突6から排出されるおそれがあり、ダイオキシンの排出規制が厳しくなった近年において大きな問題となっていた。
【0007】
【発明が解決しようとする課題】
この発明は、油等の有機揮発物質を含む土壌等の汚染物を処理する場合における上記のような問題を解決することを課題とするものであり、油等の有機揮発物質を含む土壌等の汚染物を処理する場合において、ダイオキシンが発生するのを防止すると共に、汚染物を効率よく処理できるようにすることを課題とするものである。
【0008】
【課題を解決するための手段】
この発明における汚染物の処理方法においては、上記のような課題を解決するため、蓄熱材が充填された蓄熱部と燃焼装置とを備えた蓄熱燃焼室を2つ設け、蓄熱部における蓄熱材が加熱された状態にある一方の蓄熱燃焼室に水を供給して、この水を上記の加熱された蓄熱材により水蒸気にし、この水蒸気を有機揮発物質を含む汚染物が供給された処理槽に供給して汚染物から有機揮発物質を遊離させ、遊離された有機揮発物質と水蒸気とをセパレータに導いて有機揮発物質と水とに分離し、分離された有機揮発物質を他方の蓄熱燃焼室に導いて燃焼装置により燃焼させ、この燃焼排ガスをこの蓄熱燃焼室における蓄熱部を通し、この蓄熱部における蓄熱材との間で熱交換を行って排出させるようにし、一方の蓄熱燃焼室と他方の蓄熱燃焼室とにおいて上記の操作を交互に行うようにしたのである。
【0009】
また、この発明における汚染物の処理装置においては、上記のような課題を解決するため、蓄熱材が充填された蓄熱部と燃焼装置とを備えた2つの蓄熱燃焼室と、蓄熱材が加熱状態にある一方の蓄熱燃焼室に選択的に水を供給する水供給装置と、有機揮発物質を含む汚染物が供給される処理槽と、上記の蓄熱燃焼室において発生した水蒸気を処理槽に導く水蒸気案内管と、上記の処理槽内において水蒸気により汚染物から遊離された有機揮発物質と水とを分離させるセパレータと、セパレータによって分離された有機揮発物質を他方の蓄熱燃焼室に供給する有機揮発物質供給装置とを備え、有機揮発物質が供給された他方の蓄熱燃焼室における燃焼装置により有機揮発物質を燃焼させ、この燃焼排ガスをこの燃焼排ガスをこの蓄熱燃焼室における蓄熱部を通し、この蓄熱部における蓄熱材との間で熱交換を行って排出させるようにし、一方の蓄熱燃焼室と他方の蓄熱燃焼室とにおいて上記の操作を交互に行うようにしたのである。
【0010】
ここで、この発明における汚染物の処理方法及び汚染物の処理装置のように、セパレータによって分離された有機揮発物質を他方の蓄熱燃焼室に導き、この蓄熱燃焼室における燃焼装置により有機揮発物質を燃焼させ、この燃焼排ガスをこの蓄熱燃焼室における蓄熱部を通して排出させるようにすると、上記の有機揮発物質中にダイオキシンが含まれていても、上記の燃焼によりダイオキシンが分解されると共に、燃焼排ガスが上記の蓄熱部に充填された蓄熱材と直接接触して急冷されるようになり、分解されたダイオキシンが再合成されるのも抑制され、ダイオキシンが排ガスと一緒に排出されるのが防止される。
【0011】
また、この発明における汚染物の処理方法及び汚染物の処理装置においては、上記のように有機揮発物質を燃焼させた燃焼排ガスを蓄熱部に充填された蓄熱材に直接接触させるため、熱交換が効率よく行われて、蓄熱材が適切に加熱されるようになると共に、このように蓄熱材が加熱された蓄熱燃焼室に次に水が供給されて、2つの蓄熱燃焼室において上記の操作が交互に行われるようになり、熱が有効に利用されて、汚染物を効率よく処理できるようになる。
【0012】
ここで、この発明における汚染物の処理方法及び汚染物の処理装置においては、蓄熱部に充填させる上記の蓄熱材として、耐熱性に優れたセラミックス材料を用いることが好ましく、例えば、ボール状やハニカム状になったセラミックス材料を用いることかできる。
【0013】
【発明の実施の形態】
以下、この発明の一実施形態に係る汚染物の処理方法及び処理装置を添付図面に基づいて具体的に説明する。なお、この発明に係る汚染物の処理方法及び処理装置は下記の実施形態に示すものに限定されず、発明の要旨を変更しない範囲において、適宜変更して実施できるものである。
【0014】
この実施形態においては、図2及び図3に示すように、2つの蓄熱燃焼室10a,10bを備えており、各蓄熱燃焼室10a,10bには、それぞれセラミック材料で構成された蓄熱材11a,11bが充填された蓄熱部12a,12bと、バーナー等の燃焼装置13a,13bとが設けられている。
【0015】
また、上記の各蓄熱燃焼室10a,10bに対して、それぞれ水供給切換弁14a,14bを介して水供給管15a,15bから水を供給させるようにしている。
【0016】
ここで、この実施形態において、一方の蓄熱燃焼室10aにおける蓄熱部12aに充填された蓄熱材11aが加熱された状態にある場合、図2に示すように、一方の蓄熱燃焼室10aへの水供給切換弁14aを開き、上記の水供給管15aからこの蓄熱燃焼室10aに水を供給し、この水を蓄熱部12aに充填されて加熱された状態にある蓄熱材11aにより加熱させて、1000℃程度の水蒸気にする。なお、この場合、他方の水供給切換弁14bを閉じて、他方の蓄熱燃焼室10bに水が供給されないようにする。
【0017】
そして、この蓄熱燃焼室10aにおいて発生した水蒸気を、水蒸気案内管16を通して有機揮発物質を含む土壌等の汚染物(図示せず)が供給された処理槽20に導くようにする。
【0018】
このように水蒸気を処理槽20内に供給すると、この水蒸気により処理槽20内における上記の汚染物が約200℃程度に加熱されて、汚染物に含まれる有機揮発物質が汚染物から遊離される。
【0019】
そして、このように汚染物から遊離された有機揮発物質と水蒸気とを排出管21を通してセパレータ22に導き、このセパレータ22において、上記の有機揮発物質Oと水Wとを分離させ、分離された水Wを戻し管23aを通して上記の水供給管15aに戻すようにする。なお、このように水Wの状態にすると、ガスの場合よりも戻し管23aを細くすることができる。
【0020】
一方、セパレータ22において分離された有機揮発物質ついては、有機揮発物質案内管24により吸引ファン25を通して、各蓄熱燃焼室10a,10bに対する有機揮発物質の供給の切換を行う有機揮発物質供給切換弁26a,26bに導くようにする。
【0021】
ここで、上記の状態においては、一方の蓄熱燃焼室10aに有機揮発物質の供給する有機揮発物質供給切換弁26aを閉じる一方、他方の蓄熱燃焼室10bに有機揮発物質を供給する有機揮発物質供給切換弁26bを開けると共に、この他方の蓄熱燃焼室10bに助燃料を供給する助燃料供給切換弁27b及び燃焼用空気を供給する空気供給切換弁28bを開けるようにする。
【0022】
そして、上記のように有機揮発物質供給切換弁26bを通して導かれる上記の有機揮発物質と、助燃料供給切換弁27bを通して導かれる助燃料とを混合させて他方の蓄熱燃焼室10bにおける燃焼装置13bに供給すると共に、上記の空気供給切換弁28bを通してこの燃焼装置13bに供給される燃焼用空気と混合させて、この蓄熱燃焼室10b内においてこれらを燃焼装置13bにより燃焼させる。なお、この場合、一方の蓄熱燃焼室10aに助燃料を供給する助燃料供給切換弁27a及び燃焼用空気を供給する空気供給切換弁28aは閉じた状態にする。
【0023】
ここで、上記のように蓄熱燃焼室10b内において有機揮発物質を燃焼させると、この有機揮発物質中にダイオキシンが含まれていても、この燃焼によりダイオキシンが分解される。
【0024】
そして、上記の燃焼により生じた燃焼排ガスをこの蓄熱燃焼室10b内における蓄熱部12bを通して煙道29bから外部に排出させるようにする。このようにすると、燃焼排ガスが蓄熱部12bに充填された蓄熱材11bと直接接触して急冷されるようになり、分解されたダイオキシンが再合成されるのも抑制され、ダイオキシンが排ガスと一緒に排出されるのが防止されると共に、燃焼排ガスと蓄熱材11bとの間で熱交換が効率よく行われるようになる。
【0025】
そして、上記の操作を所定時間行い、他方の蓄熱燃焼室10bにおける蓄熱材11bが十分に加熱された後は、図3に示すように、上記の各切換弁14a,14b、26a,26b、27a,27b、28a,28bの開閉を切り換え、上記のように蓄熱材11bが加熱された状態にある他方の蓄熱燃焼室10bに水供給管15bから水を供給し、この水を上記の蓄熱部12aに充填されて加熱された状態にある蓄熱材11bにより加熱させて水蒸気にし、この水蒸気を水蒸気案内管16を通して有機揮発物質を含む土壌等の汚染物が供給された処理槽20に導くようにする。
【0026】
そして、この処理槽20内において、上記のように汚染物に含まれる有機揮発物質を汚染物から遊離させ、遊離された有機揮発物質と水蒸気とを排出管21を通してセパレータ22に導き、このセパレータ22において有機揮発物質Oと水Wとを分離させ、分離された水Wを戻し管23bを通して上記の水供給管15bに戻すようにする。
【0027】
一方、分離された有機揮発物質を、上記の有機揮発物質案内管24により一方の蓄熱燃焼室10aに有機揮発物質を供給する有機揮発物質供給切換弁26aを通して導き、この蓄熱燃焼室10aに助燃料を供給する助燃料供給切換弁27aを通して供給される助燃料とを混合させて、この蓄熱燃焼室10aにおける燃焼装置13aに導き、空気供給切換弁28aを通して供給される燃焼用空気と混合させて、この蓄熱燃焼室10a内においてこれらを燃焼装置13aにより燃焼させる。
【0028】
そして、上記の燃焼により生じた燃焼排ガスをこの蓄熱燃焼室10a内における蓄熱部12aを通して煙道29aから外部に排出させると共に、この燃焼排ガスと蓄熱部12aに充填された蓄熱材11aとの間で熱交換を行い、蓄熱部12aに充填された蓄熱材11aを加熱させるようにする。
【0029】
そして、上記のような操作を交互に行い、処理槽20に供給された有機揮発物質を含む土壌等の汚染物を順々に処理させるようにする。
【0030】
【発明の効果】
以上詳述したように、この発明における汚染物の処理方法及び汚染物の処理装置においては、蓄熱材が充填された蓄熱部と燃焼装置とを備えた2つの蓄熱燃焼室において、蓄熱部における蓄熱材が加熱された状態にある一方の蓄熱燃焼室に水を供給して蓄熱材により水蒸気にし、この水蒸気を有機揮発物質を含む汚染物が供給された処理槽に供給して汚染物から有機揮発物質を遊離させ、遊離された有機揮発物質と水蒸気とをセパレータにより有機揮発物質と水とに分離し、分離された有機揮発物質を他方の蓄熱燃焼室に導いて燃焼装置により燃焼させ、この燃焼排ガスをこの蓄熱燃焼室における蓄熱部を通し、この蓄熱部における蓄熱材との間で熱交換を行って排出させるようにしたため、有機揮発物質中にダイオキシンが含まれていても、上記の燃焼によりダイオキシンが分解されると共に、燃焼排ガスが蓄熱部に充填された蓄熱材に直接接触して急冷され、分解されたダイオキシンが再合成されるのが抑制され、ダイオキシンが排ガスと一緒に排出されるのが防止されるようになった。
【0031】
また、この発明における汚染物の処理方法及び汚染物の処理装置においては、上記のように有機揮発物質を燃焼させた燃焼排ガスを蓄熱部に充填された蓄熱材に直接接触させるため、熱交換が効率よく行われて、蓄熱材が適切に加熱されるようになると共に、このように蓄熱材が加熱された蓄熱燃焼室に次に水が供給されて、2つの蓄熱燃焼室において上記の操作が交互に行われるようになり、熱が有効に利用されて、汚染物を効率よく処理できるようになった。
【図面の簡単な説明】
【図1】有機揮発物質を含む汚染物を処理する従来の装置の概略説明図である。
【図2】この発明の一実施形態に係る汚染物の処理装置において、蓄熱材11aが加熱された状態にある一方の蓄熱燃焼室10aに水を供給する一方、他方の蓄熱燃焼室10bにおいて汚染物から分離された有機揮発物質を燃焼させる状態を示した概略説明図である。
【図3】上記の実施形態における汚染物の処理装置において、蓄熱材11bが加熱された状態にある他方の蓄熱燃焼室10bに水を供給する一方、一方の蓄熱燃焼室10aにおいて汚染物から分離された有機揮発物質を燃焼させる状態を示した概略説明図である。
【符号の説明】
10a,10b 蓄熱燃焼室
11a,11b 蓄熱材
12a,12b 蓄熱部
13a,13b 燃焼装置
14a,14b 水供給切換弁
15a,15b 水供給管
16 水蒸気案内管
20 処理槽
22 セパレータ
24 有機揮発物質案内管
26a,26b 有機揮発物質供給切換弁
27a,27b 助燃料供給切換弁
28a,28b 空気供給切換弁
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and an apparatus for treating contaminants for treating contaminants such as soil containing organic volatile substances such as oil, and in particular, to prevent the generation of dioxins and to treat the contaminants efficiently. It is characterized by the following points.
[0002]
[Prior art]
2. Description of the Related Art In recent years, contaminants containing organic volatile substances such as oil have been treated to remove organic volatile substances such as oil, such as soil at a gas station site.
[0003]
Here, when treating contaminants such as soil containing organic volatile substances such as oil as described above, contaminants (not shown) are conventionally supplied into the rotary kiln 1 as shown in FIG. The contaminants are heated in the rotary kiln 1 to vaporize organic volatile substances such as oil contained in the contaminants, and the organic volatile substance gas thus vaporized is burned through the guide pipe 2. It is led into the room 3.
[0004]
The gas of the organic volatile substance is burned in the combustion chamber 3 by a combustion device 4 such as a burner, and water is introduced into the combustion chamber 3 through a water supply pipe 5, and the water is provided in the combustion chamber 3. The exhaust gas after the combustion is exchanged with heat through the pipe (not shown) provided, and the exhaust gas is cooled and discharged from the chimney 6, while the heat-exchanged and heated steam and water are discharged from the combustion chamber 3. It was taken out through a pipe 7 and used for power generation and hot water supply.
[0005]
Here, in the case of treating contaminants as described above, organic volatile substances such as oil contained in the contaminants react with chlorine contained in the contaminants to generate dioxin, and this dioxin has a temperature of 800 ° C. or more. Decomposed when held for 2 seconds or more, but recombined when held for at least 0.2 seconds in a temperature range of 200 ° C. or more during cooling.
[0006]
When the organic volatile substance gas is burned in the combustion chamber 3 by the combustion device 4 such as a burner as described above, the generated dioxin is once decomposed, but water is introduced into the combustion chamber 3 as described above. When exchanging heat with the exhaust gas after combustion through the provided pipe, the heat exchange efficiency deteriorates, it takes time to sufficiently cool the exhaust gas, and a part of the decomposed dioxin is re-synthesized, and There is a possibility that the dioxin is discharged from the chimney 6 together, and this has been a major problem in recent years in which dioxin emission regulations have become strict.
[0007]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems in treating contaminants such as soil containing organic volatile substances such as oil. It is an object of the present invention to prevent the generation of dioxin and to treat pollutants efficiently when treating pollutants.
[0008]
[Means for Solving the Problems]
In the method for treating contaminants according to the present invention, in order to solve the above-described problems, two heat storage combustion chambers each including a heat storage unit filled with a heat storage material and a combustion device are provided. Water is supplied to one of the heat storage combustion chambers in a heated state, and the water is converted into steam by the heated heat storage material, and the water vapor is supplied to a processing tank to which contaminants including organic volatile substances are supplied. To release organic volatiles from the contaminants, guide the separated organic volatiles and water vapor to a separator to separate the organic volatiles and water, and guide the separated organic volatiles to the other heat storage combustion chamber. The combustion exhaust gas is passed through a heat storage section in the heat storage combustion chamber, and heat is exchanged with a heat storage material in the heat storage section to be discharged. Combustion chamber In it was to perform alternately above operations.
[0009]
Further, in the contaminant treatment apparatus according to the present invention, in order to solve the above-described problem, two heat storage combustion chambers each including a heat storage unit filled with a heat storage material and a combustion device, and the heat storage material is in a heated state. A water supply device for selectively supplying water to one of the heat storage combustion chambers, a processing tank to which contaminants including organic volatile substances are supplied, and steam that guides steam generated in the heat storage combustion chamber to the processing tank. A guide tube, a separator that separates water and organic volatile substances released from contaminants by water vapor in the processing tank, and an organic volatile substance that supplies the organic volatile substances separated by the separator to the other heat storage combustion chamber A combustion apparatus in the other regenerative combustion chamber to which the organic volatile substance is supplied, and burns the organic volatile substance, and transfers the flue gas to the regenerative combustion chamber. Through the heat storage section, heat is exchanged with the heat storage material in the heat storage section to discharge the heat, and the above operation is alternately performed in one heat storage combustion chamber and the other heat storage combustion chamber. is there.
[0010]
Here, like the contaminant treatment method and the contaminant treatment apparatus according to the present invention, the organic volatile matter separated by the separator is led to the other heat storage combustion chamber, and the organic volatile matter is separated by the combustion apparatus in the heat storage combustion chamber. When the combustion is performed and the combustion exhaust gas is discharged through the heat storage section in the heat storage combustion chamber, even if dioxin is contained in the organic volatile substance, the combustion decomposes the dioxin and reduces the combustion exhaust gas. It becomes quenched by direct contact with the heat storage material filled in the above heat storage part, so that recomposition of decomposed dioxin is suppressed, and dioxin is prevented from being discharged together with exhaust gas. .
[0011]
In the method and apparatus for treating contaminants according to the present invention, since the combustion exhaust gas obtained by burning the organic volatile substances is brought into direct contact with the heat storage material filled in the heat storage section as described above, heat exchange is not performed. Efficiently, the heat storage material is appropriately heated, and water is then supplied to the heat storage combustion chamber in which the heat storage material is heated, and the above operation is performed in the two heat storage combustion chambers. The alternation is performed so that the heat is effectively used and the contaminants can be efficiently treated.
[0012]
Here, in the method for treating contaminants and the apparatus for treating contaminants according to the present invention, it is preferable to use a ceramic material having excellent heat resistance as the heat storage material to be filled in the heat storage unit, such as a ball-shaped or honeycomb-shaped material. A shaped ceramic material can be used.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a method and an apparatus for treating contaminants according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. It should be noted that the method and apparatus for treating contaminants according to the present invention are not limited to those described in the following embodiments, and can be appropriately modified and implemented without departing from the spirit of the invention.
[0014]
In this embodiment, as shown in FIGS. 2 and 3, two heat storage combustion chambers 10a and 10b are provided, and each of the heat storage combustion chambers 10a and 10b has a heat storage material 11a and a heat storage material 11a made of a ceramic material. Heat storage units 12a and 12b filled with 11b and combustion devices 13a and 13b such as burners are provided.
[0015]
Further, water is supplied to the heat storage combustion chambers 10a and 10b from the water supply pipes 15a and 15b via the water supply switching valves 14a and 14b, respectively.
[0016]
Here, in this embodiment, when the heat storage material 11a filled in the heat storage unit 12a in the one heat storage combustion chamber 10a is in a heated state, as shown in FIG. The supply switching valve 14a is opened, water is supplied to the heat storage combustion chamber 10a from the water supply pipe 15a, and the water is heated by the heat storage material 11a which is filled in the heat storage unit 12a and is heated. Convert to steam of about ° C. In this case, the other water supply switching valve 14b is closed so that water is not supplied to the other heat storage combustion chamber 10b.
[0017]
Then, the steam generated in the heat storage combustion chamber 10a is guided through the steam guide pipe 16 to the processing tank 20 to which contaminants (not shown) such as soil containing organic volatile substances are supplied.
[0018]
When the water vapor is supplied into the processing tank 20, the contaminants in the processing tank 20 are heated to about 200 ° C. by the water vapor, and the organic volatile substances contained in the contaminants are released from the contaminants. .
[0019]
Then, the organic volatile substances and water vapor thus released from the contaminants are led to the separator 22 through the discharge pipe 21. In the separator 22, the organic volatile substances O and the water W are separated from each other. W is returned to the water supply pipe 15a through the return pipe 23a. In this case, when the state of the water W is set, the return pipe 23a can be made thinner than in the case of the gas.
[0020]
On the other hand, with respect to the organic volatile matter separated in the separator 22, the organic volatile matter supply switching valve 26a, which switches the supply of the organic volatile substance to each of the heat storage combustion chambers 10a and 10b through the suction fan 25 through the organic volatile matter guide tube 24. 26b.
[0021]
Here, in the above state, the organic volatile substance supply switching valve 26a for supplying the organic volatile substance to one of the thermal storage combustion chambers 10a is closed, and the organic volatile substance supply for supplying the organic volatile substance to the other thermal storage combustion chamber 10b is closed. The switching valve 26b is opened, and the auxiliary fuel supply switching valve 27b for supplying auxiliary fuel to the other heat storage combustion chamber 10b and the air supply switching valve 28b for supplying combustion air are opened.
[0022]
Then, as described above, the above-mentioned organic volatile substance guided through the organic volatile substance supply switching valve 26b and the auxiliary fuel guided through the auxiliary fuel supply switching valve 27b are mixed and supplied to the combustion device 13b in the other heat storage combustion chamber 10b. While being supplied, the air is mixed with the combustion air supplied to the combustion device 13b through the air supply switching valve 28b, and is burned by the combustion device 13b in the heat storage combustion chamber 10b. In this case, the auxiliary fuel supply switching valve 27a for supplying auxiliary fuel to the one heat storage combustion chamber 10a and the air supply switching valve 28a for supplying combustion air are closed.
[0023]
Here, when the organic volatile substance is burned in the heat storage combustion chamber 10b as described above, the dioxin is decomposed by the combustion even if the organic volatile substance contains dioxin.
[0024]
Then, the flue gas generated by the combustion is discharged from the flue 29b to the outside through the heat storage section 12b in the heat storage combustion chamber 10b. By doing so, the combustion exhaust gas comes into direct contact with the heat storage material 11b filled in the heat storage portion 12b and is rapidly cooled, so that recomposition of the decomposed dioxin is suppressed, and the dioxin is removed together with the exhaust gas. The exhaust gas is prevented from being discharged, and the heat exchange between the combustion exhaust gas and the heat storage material 11b is efficiently performed.
[0025]
After the above operation is performed for a predetermined time and the heat storage material 11b in the other heat storage combustion chamber 10b is sufficiently heated, as shown in FIG. 3, each of the above-mentioned switching valves 14a, 14b, 26a, 26b, 27a , 27b, 28a, 28b are switched to supply water from the water supply pipe 15b to the other heat storage combustion chamber 10b in which the heat storage material 11b is heated as described above, and this water is stored in the heat storage unit 12a. The steam is heated by the heat storage material 11b filled and heated to form steam, and the steam is led through the steam guide pipe 16 to the treatment tank 20 to which contaminants such as soil containing organic volatile substances are supplied. .
[0026]
Then, in the processing tank 20, the organic volatile substances contained in the contaminants are released from the contaminants as described above, and the released organic volatile substances and water vapor are led to the separator 22 through the discharge pipe 21. In the above, the organic volatile matter O and the water W are separated, and the separated water W is returned to the water supply pipe 15b through the return pipe 23b.
[0027]
On the other hand, the separated organic volatile matter is guided through the organic volatile matter guide pipe 24 through the organic volatile matter supply switching valve 26a for supplying the organic volatile matter to one of the heat storage combustion chambers 10a. Is mixed with the auxiliary fuel supplied through the auxiliary fuel supply switching valve 27a that supplies the fuel to the combustion device 13a in the heat storage combustion chamber 10a, and mixed with the combustion air supplied through the air supply switching valve 28a. These are burned by the combustion device 13a in the heat storage combustion chamber 10a.
[0028]
Then, the flue gas generated by the above-described combustion is discharged to the outside from the flue 29a through the regenerator 12a in the regenerative combustion chamber 10a, and between the flue gas and the regenerator material 11a filled in the regenerator 12a. Heat exchange is performed to heat the heat storage material 11a filled in the heat storage unit 12a.
[0029]
Then, the above operations are alternately performed to sequentially treat contaminants such as soil containing organic volatile substances supplied to the treatment tank 20.
[0030]
【The invention's effect】
As described above in detail, in the method for treating contaminants and the apparatus for treating contaminants according to the present invention, the heat storage in the heat storage unit is performed in two heat storage combustion chambers each including the heat storage unit filled with the heat storage material and the combustion device. Water is supplied to one of the heat storage combustion chambers in which the material is heated and turned into steam by the heat storage material, and this water vapor is supplied to a treatment tank to which contaminants containing organic volatile substances have been supplied, and organic vaporization from the contaminants is performed. The substances are released, the separated organic volatile substances and water vapor are separated into organic volatile substances and water by a separator, and the separated organic volatile substances are led to the other heat storage combustion chamber and burned by a combustion device. Exhaust gas is passed through the heat storage section in the heat storage combustion chamber, and heat is exchanged with the heat storage material in the heat storage section to discharge the exhaust gas, so that even when dioxin is contained in the organic volatile substance, Dioxin is decomposed by the above-mentioned combustion, and the combustion exhaust gas is brought into direct contact with the heat storage material filled in the heat storage unit and quenched, so that the recombined decomposed dioxin is suppressed, and the dioxin is removed together with the exhaust gas. Emissions are now prevented.
[0031]
In the method for treating contaminants and the apparatus for treating contaminants according to the present invention, since the combustion exhaust gas obtained by burning the organic volatile substances is brought into direct contact with the heat storage material filled in the heat storage section as described above, heat exchange is not performed. Efficiently performed, the heat storage material is appropriately heated, and water is then supplied to the heat storage combustion chamber in which the heat storage material is heated, and the above operation is performed in the two heat storage combustion chambers. The alternation has been carried out, and the heat has been effectively used, so that the contaminants can be efficiently treated.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view of a conventional apparatus for treating contaminants containing organic volatile substances.
FIG. 2 is a diagram showing a configuration of a contaminant treating apparatus according to an embodiment of the present invention. It is the schematic explanatory drawing which showed the state which burns the organic volatile substance isolate | separated from the thing.
FIG. 3 is a diagram showing a configuration of a contaminant treatment apparatus according to the above embodiment, in which water is supplied to another heat storage combustion chamber 10b in which a heat storage material 11b is heated, while water is separated from contaminants in one heat storage combustion chamber 10a. FIG. 3 is a schematic explanatory view showing a state in which a burned organic volatile substance is burned.
[Explanation of symbols]
10a, 10b Thermal storage combustion chamber 11a, 11b Thermal storage material 12a, 12b Thermal storage section 13a, 13b Combustion device 14a, 14b Water supply switching valve 15a, 15b Water supply pipe 16 Steam guide pipe 20 Treatment tank 22 Separator 24 Organic volatile matter guide pipe 26a , 26b Organic volatile substance supply switching valve 27a, 27b Auxiliary fuel supply switching valve 28a, 28b Air supply switching valve

Claims (3)

蓄熱材が充填された蓄熱部と燃焼装置とを備えた蓄熱燃焼室を2つ設け、蓄熱部における蓄熱材が加熱された状態にある一方の蓄熱燃焼室に水を供給して、この水を上記の加熱された蓄熱材により水蒸気にし、この水蒸気を有機揮発物質を含む汚染物が供給された処理槽に供給して汚染物から有機揮発物質を遊離させ、遊離された有機揮発物質と水蒸気とをセパレータに導いて有機揮発物質と水とに分離し、分離された有機揮発物質を他方の蓄熱燃焼室に導いて燃焼装置により燃焼させ、この燃焼排ガスをこの蓄熱燃焼室における蓄熱部を通し、この蓄熱部における蓄熱材との間で熱交換を行って排出させるようにし、一方の蓄熱燃焼室と他方の蓄熱燃焼室とにおいて上記の操作を交互に行うことを特徴とする汚染物の処理方法。Two heat storage combustion chambers each including a heat storage unit filled with a heat storage material and a combustion device are provided, and water is supplied to one of the heat storage combustion chambers in a state where the heat storage material in the heat storage unit is heated. The heated heat storage material converts the water vapor into steam, and supplies the water vapor to the processing tank to which the contaminant containing the organic volatile substance is supplied to release the organic volatile substance from the contaminant. To the separator to separate the organic volatile matter and water, the separated organic volatile matter is guided to the other heat storage combustion chamber and burned by a combustion device, and the combustion exhaust gas passes through a heat storage unit in the heat storage combustion chamber, A method for treating contaminants, wherein heat is exchanged between the heat storage material in the heat storage unit and the heat storage material is discharged, and the above operation is alternately performed in one heat storage combustion chamber and the other heat storage combustion chamber. . 蓄熱材が充填された蓄熱部と燃焼装置とを備えた2つの蓄熱燃焼室と、蓄熱材が加熱状態にある一方の蓄熱燃焼室に選択的に水を供給する水供給装置と、有機揮発物質を含む汚染物が供給される処理槽と、上記の蓄熱燃焼室において発生した水蒸気を処理槽に導く水蒸気案内管と、上記の処理槽内において水蒸気により汚染物から遊離された有機揮発物質と水とを分離させるセパレータと、セパレータによって分離された有機揮発物質を他方の蓄熱燃焼室に供給する有機揮発物質供給装置とを備え、有機揮発物質が供給された他方の蓄熱燃焼室における燃焼装置により有機揮発物質を燃焼させ、この燃焼排ガスをこの蓄熱燃焼室における蓄熱部を通し、この蓄熱部における蓄熱材との間で熱交換を行って排出させ、一方の蓄熱燃焼室と他方の蓄熱燃焼室とにおいて上記の操作を交互に行うことを特徴とする汚染物の処理装置。Two heat storage combustion chambers having a heat storage unit filled with a heat storage material and a combustion device, a water supply device for selectively supplying water to one of the heat storage combustion chambers in which the heat storage material is in a heated state, and an organic volatile substance A treatment tank to which contaminants containing are supplied, a steam guide pipe for guiding steam generated in the heat storage combustion chamber to the treatment tank, and an organic volatile matter and water released from the contaminants by steam in the treatment tank. A separator for separating the organic volatile matter separated by the separator and an organic volatile matter supply device for supplying the organic volatile matter separated by the separator to the other heat storage combustion chamber, and the organic volatile matter is supplied to the other heat storage combustion chamber by the combustion device in the other heat storage combustion chamber. The volatile substances are burned, and the combustion exhaust gas passes through a heat storage section in the heat storage combustion chamber, and heat is exchanged with the heat storage material in the heat storage section to be discharged. Processing apparatus contaminants and performing alternately above operations in the thermal combustion chamber. 請求項2に記載した汚染物の処理装置において、上記の蓄熱材として、セラミックス材料を用いたことを特徴とする汚染物の処理装置。3. The apparatus for treating contaminants according to claim 2, wherein a ceramic material is used as the heat storage material.
JP2003014779A 2003-01-23 2003-01-23 Method and apparatus for treating contaminant Pending JP2004223418A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010253416A (en) * 2009-04-27 2010-11-11 Omega:Kk System for cleaning contaminated soil and sand

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010253416A (en) * 2009-04-27 2010-11-11 Omega:Kk System for cleaning contaminated soil and sand

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