JP2004195342A - Detoxication method of incineration ash and the like - Google Patents

Detoxication method of incineration ash and the like Download PDF

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Publication number
JP2004195342A
JP2004195342A JP2002365959A JP2002365959A JP2004195342A JP 2004195342 A JP2004195342 A JP 2004195342A JP 2002365959 A JP2002365959 A JP 2002365959A JP 2002365959 A JP2002365959 A JP 2002365959A JP 2004195342 A JP2004195342 A JP 2004195342A
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Japan
Prior art keywords
ash
rpf
waste
rdf
incineration
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JP2002365959A
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Japanese (ja)
Inventor
Yuji Mizukoshi
裕治 水越
Yoshiyuki Takii
芳幸 滝井
Kazuyuki Ueda
和幸 上田
Kenji Ikeda
健二 池田
Nobuyoshi Sakai
信好 界
Osamu Nishio
修 西尾
Jun Nakakoshi
純 中越
Yumiko Yoshimitsu
由美子 吉光
Keiko Kawanishi
景子 川西
Toshio Yamaguchi
俊雄 山口
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ACTREE Corp
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ACTREE Corp
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

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  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Fire-Extinguishing Compositions (AREA)
  • Gasification And Melting Of Waste (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circulation type recycling technique capable of securely detoxicating not only an organic chlorine compound such as dioxin but also incineration ash as a combined pollutant containing heavy metal with a simple method and, moreover, utilizing RDF and RPF which are produced from waste, or waste plastics as auxiliary fuel. <P>SOLUTION: The refuse derived fuel (RDF), the refuse plastic fuel (RPF) or the waste plastic is mixed singly or in combination to incineration bottom ash or fly ash containing harmful organic chlorine compound and is heated to 600°C or more, and the incineration ash is detoxicated. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
この発明は、ダイオキシン類等の有害な有機塩素化合物及び重金属の含有した、一般廃棄物焼却炉及び産業廃棄物焼却炉から発生する主灰又は飛灰を、廃棄物燃料であるRDF、RPF、廃プラスチック類等を混合して加熱焼成することにより、ダイオキシン類等の有機塩素化合物においては分解無害化、重金属においては揮発させ、後段に設置したバグフィルターで回収し、再資源化のための原料とし、かつ、焼成物については有機分が無いため、セメント原料やコンクリート骨材等に再利用することができる技術に関する。
【0002】
【従来の技術】
一般廃棄物焼却炉及び産業廃棄物焼却炉から発生する主灰(ボトム灰)は、特別管理産業廃棄物として最終処分場で埋立処理されていたが、近年は埋立場不足が著しく、年々その埋立場の確保は難しくなってきている。
また、埋立規制基準を上回るダイオキシン類や重金属を含有する焼却灰は、その溶出を防止するためにコンクリート固化処理が一般的であるが、コンクリートに混合できる焼却灰は約10%程度が限界である。
従って、埋立てられる容量及び重量は原灰の10倍近くになり、それがさらに埋立場の不足を加速させる原因となっている。
そこで、含有有機物や重金属が無害化できれば、その組成が似通っているセメント原料やコンクリート骨材に有効利用することが期待できるだけでなく、埋立処分量を減少させるのに有効である。
しかし、かかる従来技術によるときは、有害なダイオキシン類の分解が大変なだけでなく、重金属が十分に除去できることは不可能であった。
【0003】
一方、廃棄物を固形化燃料としたものとして、RDF、RPF等が知られている。
詳細については後述するが、これらは主に燃料に使用されている。
しかし、生産量に対して消費量が追従せず、その処理に苦慮しているのが現状である。
また、単に燃料として焼却した場合、ばいじん、硫黄酸化物、窒素酸化物、塩化水素、ダイオキシン類が通常の廃棄物焼却工程と同じく発生することも分かっている。
【0004】
【発明が解決しようとする課題】
この発明は、かかる従来技術の問題に鑑み、ダイオキシン類などの有害な有機塩素化合物のみならず、重金属含有などの複合汚染物である焼却灰を簡単な方法で確実に無害化出来、しかも、廃棄物から製造されたRDF、RPF又は廃プラスチック類を補助燃料として使用し、循環型のリサイクル技術の提供を目的とする。
【0005】
【課題を解決するための手段】
かかる目的を達成するため、請求項1記載に係る発明の要旨は、有害な有機塩素化合物を含有する焼却主灰又は飛灰に、廃棄物固形化燃料(RDF)又は廃プラスチック類燃料(RPF)あるいは、廃プラスチック類のいずれかを単独又は組み合わせて混合して600℃以上に加熱し、好ましくは800℃以上に加熱し、無害化処理することにある。
なお、有機塩素化合物は請求項2記載の発明のようにダイオキシン類であってもよい。
ここで、焼却主灰及び飛灰とは、「廃棄物の処理及び清掃に関する法律」に指定される一般廃棄物焼却炉及び産業廃棄物焼却炉から排出される主灰及び焼却飛灰のことである。(以下、焼却灰等という)
ここでRDF(Refuse Derived Fuel)とは、「ごみ固形化燃料」のことであり、可燃廃棄物を分別し乾燥させ石灰等の固化剤でペレット状に固形化したものである。
ここでRPF(Refuse Plastic Fuel)とは、「廃プラスチック類燃料」のことであり、カロリーの高い廃プラスチック類を廃棄物から分別し、破砕加熱させペレット状に固形化したものである。
ここで廃プラスチック類とは、「廃棄物の処理及び清掃に関する法律」に指定される廃プラスチック類のことである。
【0006】
請求項3記載に係る発明の要旨は、有害な重金属を含有する焼却主成又は飛灰に、RDF、又はRPF、あるいは廃プラスチック類のいずれかを単独又は組み合わせて混合して、600℃以上に加熱し、好ましくは800℃以上で加熱処理し、重金属を除去することにある。
【0007】
請求項4記載に係る発明の要旨は、有害な有機塩素化合物、及び有害な重金属の両方を含む複合汚染した焼却灰等にRDF、RPF、もしくは廃プラスチック類又はそれらを組み合わせて混合し、600℃以上に加熱処理、好ましくは800℃以上で加熱処理し、有機塩素化合物、及び重金属を同時に除去することにある。
【0008】
本発明においては、ダイオキシン類をはじめとして、ジクロロメタン、四塩化炭素、12−ジクロロエタン、1.1−ジクロロエチレン、シス−1.2−ジクロロエチレン、1.1.1−トリクロロエタン、1.1.2−トリクロロエチレン、テトラクロロエチレン、1.3−ジクロロプロペンなどの有機塩素化合物を含有する焼却灰等に、RDF、RPF、もしくは廃プラスチック類を添加し、600℃以上、好ましくは800℃以上に加熱することで、これら有機塩素化合物が揮発、分解し、無害化される。
ダイオキシン類の分解生成物であり、生成時の前躯体ともなる塩素化合物もRDF、RPF、もしくは廃プラスチック類に含有するアルカリ金属と反応し、高温時においても安定な塩の形で固定される。
【0009】
また、カドミウム、鉛、クロム、ヒ素、水銀、銅、セレンなどの有害な重金属を含有する焼却灰にRDF、RPF、もしくは廃プラスチック類を添加し、600℃以上、好ましくは800℃以上に加熱することで、重金属はRDF、RPF、もしくは廃プラスチック類に含まれる塩素分によって、蒸気圧の高い塩化物となり、排ガスとともに焼却炉から排出される。
排出された重金属を含むガスは、急速冷却塔で200℃以下に冷却され、バグフィルターに代表される高度な集塵機で重金属は捕集される。
捕集された重金属は製錬等の手法で原材料にリサイクルすることが出来る。
【0010】
次に重金属の挙動を調査すべく以下のような比較試験をした。
本発明に係る添加物を加えず、単に焼却灰を600℃以上に加熱した場合、その多くはpHが12以上に上がることが確認された。
その結果、鉛においてはpHが12を超えると両性金属であるが故、溶出量は急に増える。
ここでの溶出は、環境庁告示13号試験による。
よって、加熱処理せず単に溶出試験した場合と比較すると、添加物を加えず焼却灰を加熱処理した方が鉛の溶出量は増えることが明らかになった。
【0011】
カドミウム・銅については、強酸領域では溶出は認められるが、アルカリ領域での溶出は認められなかった。
よって、添加物を加えず加熱した場合と、加熱せずに単に溶出試験した場合とを比較するとその溶出量に変化は無かった。
【0012】
クロムについては、蒸気圧が非常に低いので加熱処理による変化は少ないと思われたが、本発明に係る添加物を加えずに加熱し、溶出試験をしてみると六価クロムの溶出量が増えることが確認された。
これは添加物を加えずに加熱すると、加熱雰囲気中の酸素が三価クロムを六価クロムに酸化したものと考えられ、蒸気圧の低いクロムは、有害な六価の形で焼却灰に留まることが確認された。
【0013】
上記に対して本発明に係る方法で、RDF、RPF、もしくは廃プラスチック類のいずれかを単独又は組み合わせて混合し、600℃以上に加熱処理したところ、無害な三価クロムは存在するが、六価クロムは溶出しないことが明らかになった。
ここで、無害な三価クロムはセメントにも含まれており、環境に与える影響は非常に少ない。
これは、RDF、RPF、廃プラスチック類に含まれる炭素分が反応炉内で環流し、残留炭素として一定時間存在する。
その残留炭素が徐々に酸化される際に還元剤として働き、三価クロムの酸化を防止すると推測される。
【0014】
【発明の実施の形態】
ごみ焼却炉から排出された焼却灰を複数サンプリングし、RDF、RPF、もしくは廃プラスチック類をそれぞれ単独又は組み合わせて5質量%から30質量%混合し、約800℃で、約1時間加熱処理後の重金属の溶出試験結果を図1に示す。
上記添加物を混合せずに、単に焼却灰だけを加熱した場合には、六価クロムの溶出量が0.46mg/Lであったのに対して、例えばRPF10質量%混合したものは0.044mg/L、RPF20質量%混合したものは0.033mg/Lに減少していた。
【0015】
他の重金属も減少した。
なお、表にてNDとは検出限界未満であったことを示す。
【0016】
ダイオキシン類及び有害有機塩素化合物は、800℃以上で分解した。
【0017】
図2に本発明に係る焼却灰等の無害化処理手順の一例を示す。
汚染した焼却灰の処理設備を焼却工場内に併設すると、これまで焼却灰搬送時の飛散対策についても解決することができる。
処理設備はバッチ式でもキルン炉であってもよい。
【0018】
「浄化手順」
焼却灰の篩い分けを行い、別に再利用可能な金属クズを磁選別等の手法で分離する。
選別された金属類は直接金属回収の原料になる。
【0019】
焼却灰にRDF、RPF、もしくは廃プラスチック類のいずれかを単独又は組み合わせて2〜30質量%混合し、飛散を防止した送り込み装置にて焼成炉に導入する。
焼成炉は乾燥ゾーン、昇温ゾーン、塩化揮発ゾーン、焼成ゾーンを考慮した構造とする。
乾燥ゾーンの長さは、投入された焼却灰の水分をほぼ、蒸発出来る長さとする。
昇温ゾーンは、乾燥した焼却灰を約600℃付近まで昇温出来る長さとする。
塩化揮発ゾーンは、添加したRDF、RPF、廃プラスチック類が乾留化し、残留炭素として存在する時間、及び重金属が塩化揮発する時間の両方を考慮した長さとする。
焼成ゾーンは、残留有機分がすべて酸化する長さとする。
この工程により、クロムを除く重金属は、RDF、RPF、又は廃プラスチック類に含まれる塩素分により塩化揮発が起こる。
クロムは、RDF、RPF、又は廃プラスチック類に含まれる未燃炭素により還元され、三価の状態で留まり、六価クロムにはならない。
【0020】
焼成が終了し無害化された焼却灰は、飛散を防止した搬送装置でコンテナ等に保管される。
無害化処理された焼却灰を入れたコンテナはそのまま原料として、新たな資材化工場に搬送される。
【0021】
塩化揮発した重金属は排ガスとともに、減温塔にて温度を200℃前後まで降下し、ごく微量のダイオキシン類の再合成を防止する。
燃料から放出される酸性ガスを中和するために消石灰等の中和薬剤をガスと混合し、バグフィルター等の高度な集塵機で集塵する。
集塵されたダストは、高濃度の重金属が含有されているため、製錬手法や山元還元等の手法にて金属回収を行う原料として利用される。
【0022】
【発明の効果】
本発明によれば、ダイオキシン類をはじめとする有害有機塩素化合物や重金属に汚染された焼却灰をRDF、RPF、もしくは廃プラスチック類を一定の割合で添加して加熱処理することにより、無害化することができる。
特に、有害有機塩素化合物や重金属による汚染を同時に処理できるという優れた効果があると同時に、廃棄物を燃料とし製造された固形化燃料及び廃棄物である廃プラスチックを熱エネルギーとして利用することが出来る。
また、処理物は各種原料として再利用することができるという循環型社会に貢献するという優れた特徴を有する。
【図面の簡単な説明】
【図1】重金属の溶出試験結果を示す。
【図2】本発明に係る焼却灰等の無害化処理手順を示す。
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention converts main ash or fly ash generated from general waste incinerators and industrial waste incinerators containing harmful organochlorine compounds such as dioxins and heavy metals into waste fuel RDF, RPF, waste fuel. By mixing and firing plastics and the like, organic chlorine compounds such as dioxins are decomposed and made harmless, heavy metals are volatilized, and collected with a bag filter installed at the later stage to be used as raw materials for recycling. In addition, the present invention relates to a technique that can be reused as a raw material for cement, concrete aggregate, and the like because the fired product has no organic component.
[0002]
[Prior art]
Main ash (bottom ash) generated from general waste incinerators and industrial waste incinerators has been landfilled at final disposal sites as specially managed industrial waste. Securing space is becoming more difficult.
Also, incineration ash containing dioxins and heavy metals exceeding the landfill regulation standards is generally subjected to concrete solidification treatment to prevent its elution, but the limit of incineration ash that can be mixed with concrete is about 10%. .
Thus, the volume and weight of landfills is nearly 10 times that of raw ash, which further accelerates the shortage of landfills.
Therefore, if the contained organic matter and heavy metals can be rendered harmless, it can be expected to be effectively used for cement raw materials and concrete aggregates having similar compositions, and is also effective for reducing the amount of landfill disposal.
However, according to such a conventional technique, it is not only difficult to decompose harmful dioxins, but also it is impossible to sufficiently remove heavy metals.
[0003]
On the other hand, RDF, RPF, and the like are known as waste solidified fuel.
Although details will be described later, these are mainly used for fuel.
However, at present, consumption does not follow production, and it is difficult to deal with it.
It has also been found that when simply incinerated as fuel, soot, sulfur oxides, nitrogen oxides, hydrogen chloride, and dioxins are generated in the same manner as in a normal waste incineration process.
[0004]
[Problems to be solved by the invention]
In view of the above problems of the prior art, the present invention can reliably detoxify not only harmful organic chlorine compounds such as dioxins, but also incineration ash, which is a complex contaminant containing heavy metals, by a simple method, and furthermore, dispose of it. An object of the present invention is to provide a recycling-type recycling technology using RDF, RPF or waste plastics manufactured from products as auxiliary fuel.
[0005]
[Means for Solving the Problems]
In order to achieve such an object, the gist of the invention according to claim 1 is that a waste solidified fuel (RDF) or a waste plastics fuel (RPF) is added to incinerated main ash or fly ash containing a harmful organic chlorine compound. Alternatively, any of the waste plastics may be used alone or in combination and heated to 600 ° C. or more, preferably to 800 ° C. or more, for detoxification treatment.
The organic chlorine compound may be a dioxin as in the second aspect of the present invention.
Here, incineration main ash and fly ash are the main ash and incineration fly ash discharged from municipal solid waste incinerators and industrial waste incinerators specified in the "Law on the Treatment and Cleaning of Waste". is there. (Hereinafter referred to as incineration ash)
Here, RDF (Refuse Derived Fuel) is "garbage solidified fuel", which is obtained by separating combustible waste, drying it, and solidifying it into pellets with a solidifying agent such as lime.
Here, RPF (Refuse Plastic Fuel) is "waste plastic fuel", and is obtained by separating waste plastics having high calories from waste, crushing and heating, and solidifying them into pellets.
Here, the waste plastics are waste plastics specified in the “Waste Treatment and Cleaning Law”.
[0006]
The gist of the invention according to claim 3 is that RDF, RPF, or waste plastics are mixed alone or in combination with incineration materials or fly ash containing harmful heavy metals, and heated to 600 ° C. or more. Heating, preferably at 800 ° C. or higher, to remove heavy metals.
[0007]
The gist of the invention according to claim 4 is that RDF, RPF, or waste plastics or a combination thereof is mixed with incinerated ash or the like contaminated with compound containing both harmful organic chlorine compounds and harmful heavy metals, and mixed at 600 ° C. As described above, the heat treatment is performed, preferably at 800 ° C. or more, to remove the organic chlorine compound and the heavy metal at the same time.
[0008]
In the present invention, in addition to dioxins, dichloromethane, carbon tetrachloride, 12-dichloroethane, 1.1-dichloroethylene, cis-1.2-dichloroethylene, 1.1.1-trichloroethane, 1.1.2-trichloroethylene By adding RDF, RPF, or waste plastics to incinerated ash containing organic chlorine compounds such as tetrachloroethylene, 1.3-dichloropropene, etc., and heating them to 600 ° C. or more, preferably 800 ° C. or more, Organic chlorine compounds are volatilized and decomposed to make them harmless.
Chlorine compounds, which are decomposition products of dioxins and also serve as precursors at the time of formation, also react with RDF, RPF, or alkali metals contained in waste plastics, and are fixed in a stable salt form even at high temperatures.
[0009]
In addition, RDF, RPF, or waste plastics are added to incineration ash containing harmful heavy metals such as cadmium, lead, chromium, arsenic, mercury, copper, and selenium, and heated to 600 ° C. or higher, preferably 800 ° C. or higher. As a result, heavy metals become chlorides having a high vapor pressure due to chlorine contained in RDF, RPF, or waste plastics, and are discharged from the incinerator together with exhaust gas.
The discharged gas containing heavy metal is cooled to 200 ° C. or lower in a rapid cooling tower, and the heavy metal is collected by an advanced dust collector represented by a bag filter.
The collected heavy metals can be recycled into raw materials by a method such as smelting.
[0010]
Next, the following comparative tests were conducted to investigate the behavior of heavy metals.
When the incinerated ash was simply heated to 600 ° C. or higher without adding the additive according to the present invention, it was confirmed that in many cases, the pH increased to 12 or higher.
As a result, when the pH exceeds 12, lead is an amphoteric metal, so that the amount of elution rapidly increases.
The elution here is based on the Environment Agency Notification No. 13 test.
Therefore, it became clear that the amount of lead eluted increases when the incineration ash is heat-treated without adding any additive, as compared with the case where the dissolution test is simply performed without heat treatment.
[0011]
For cadmium and copper, elution was observed in the strong acid region, but no elution was observed in the alkaline region.
Therefore, comparing the case where heating was performed without adding an additive and the case where the dissolution test was simply performed without heating, there was no change in the amount of dissolution.
[0012]
Regarding chromium, the change due to the heat treatment was considered to be small because the vapor pressure was very low, but heating was performed without adding the additive according to the present invention. It was confirmed that it would increase.
It is thought that when heated without adding additives, oxygen in the heated atmosphere oxidized trivalent chromium to hexavalent chromium, and chromium with a low vapor pressure remained in the incinerated ash in a harmful hexavalent form It was confirmed that.
[0013]
In contrast to the above, according to the method of the present invention, any one of RDF, RPF, and waste plastics is used alone or in combination and heat-treated at 600 ° C. or higher. It was found that chromium (VI) did not elute.
Here, harmless trivalent chromium is also contained in cement, and has very little effect on the environment.
This is because the carbon content contained in RDF, RPF, and waste plastics circulates in the reaction furnace and remains for a certain period of time as residual carbon.
It is presumed that when the residual carbon is gradually oxidized, it acts as a reducing agent and prevents oxidation of trivalent chromium.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
After sampling a plurality of incineration ash discharged from the refuse incinerator, mixing RDF, RPF, or waste plastics individually or in combination with each other in an amount of 5% by mass to 30% by mass, and heating at about 800 ° C. for about 1 hour. FIG. 1 shows the results of the dissolution test of heavy metals.
When only the incineration ash was heated without mixing the above additives, the elution amount of hexavalent chromium was 0.46 mg / L, whereas, for example, RPF 10% by mass was mixed with 0.1%. A mixture of 044 mg / L and 20% by mass of RPF was reduced to 0.033 mg / L.
[0015]
Other heavy metals also decreased.
In the table, ND indicates that it was below the detection limit.
[0016]
Dioxins and harmful organic chlorine compounds decomposed at 800 ° C. or higher.
[0017]
FIG. 2 shows an example of the procedure for detoxifying incineration ash and the like according to the present invention.
If a facility for treating contaminated incinerated ash is installed in the incineration plant, it is possible to solve the measures against scattering when transporting incinerated ash.
The processing equipment may be a batch type or a kiln furnace.
[0018]
"Purification procedure"
The incineration ash is sieved, and separately reusable metal waste is separated by a technique such as magnetic separation.
The selected metals are directly used as raw materials for metal recovery.
[0019]
Any one of RDF, RPF, and waste plastics is used alone or in combination with the incinerated ash in an amount of 2 to 30% by mass, and the mixture is introduced into a baking furnace by a feeding device that prevents scattering.
The firing furnace has a structure in consideration of a drying zone, a temperature raising zone, a chloride volatilization zone, and a firing zone.
The length of the drying zone should be long enough to evaporate the water content of the incinerated ash.
The heating zone has a length capable of heating the dried incinerated ash to about 600 ° C.
The chloride volatilization zone has a length that takes into account both the time during which the added RDF, RPF, and waste plastics are carbonized and present as residual carbon, and the time during which heavy metals are chlorinated and volatilized.
The sintering zone has such a length that all residual organic components are oxidized.
By this step, heavy metals other than chromium are chlorinated and volatilized by chlorine contained in RDF, RPF, or waste plastics.
Chromium is reduced by unburned carbon contained in RDF, RPF, or waste plastics, stays in a trivalent state, and does not become hexavalent chromium.
[0020]
The incinerated ash that has been burned and rendered harmless is stored in a container or the like by a transport device that prevents scattering.
The container containing the detoxified incinerated ash is transported as it is to a new material conversion plant.
[0021]
The heavy metal that has been chlorinated and volatilized, together with the exhaust gas, is cooled to a temperature of about 200 ° C. in a cooling tower to prevent re-synthesis of a very small amount of dioxins.
A neutralizing agent such as slaked lime is mixed with the gas to neutralize the acid gas released from the fuel, and collected by an advanced dust collector such as a bag filter.
Since the collected dust contains a high concentration of heavy metals, it is used as a raw material for recovering metals by a smelting method or a yamamoto reduction method.
[0022]
【The invention's effect】
According to the present invention, incineration ash contaminated with harmful organic chlorine compounds and heavy metals including dioxins is made harmless by adding a certain ratio of RDF, RPF, or waste plastics and performing heat treatment. be able to.
In particular, it has an excellent effect of being able to simultaneously treat pollution caused by harmful organic chlorine compounds and heavy metals, and at the same time, can use solid fuel produced with waste as fuel and waste plastic as waste as thermal energy. .
In addition, the processed material has an excellent feature that it can be reused as various raw materials and contributes to a recycling-oriented society.
[Brief description of the drawings]
FIG. 1 shows the results of a dissolution test of heavy metals.
FIG. 2 shows a procedure for detoxifying incineration ash and the like according to the present invention.

Claims (4)

有害な有機塩素化合物を含有する焼却主灰又は飛灰に、廃棄物固形化燃料(RDF)又は廃プラスチック類燃料(RPF)あるいは、廃プラスチック類のいずれかを単独又は組み合わせて混合して、600℃以上に加熱処理することを特徴とする焼却灰等の無害化処理方法。Solid waste fuel (RDF), waste plastics fuel (RPF), or waste plastics, either alone or in combination with the incinerated main ash or fly ash containing harmful organic chlorine compounds, is used for 600 minutes. A method for detoxifying incinerated ash or the like, characterized by performing a heat treatment at a temperature of at least ℃. 有機塩素化合物がダイオキシン類である請求項1記載の焼却灰等の無害化処理方法。The method for detoxifying incinerated ash or the like according to claim 1, wherein the organic chlorine compound is a dioxin. 有害な重金属を含有する焼却主成又は飛灰に、RDF、又はRPF、あるいは廃プラスチック類のいずれかを単独又は組み合わせて混合して、600℃以上に加熱処理することを特徴とする焼却灰等の無害化処理方法。Incineration ash, etc., characterized in that RDF, RPF, or waste plastics are used alone or in combination with incineration materials or fly ash containing harmful heavy metals and heated to 600 ° C or higher. Detoxification method. 有害な有機塩素化合物及び有害な重金属を含有する焼却主灰又は飛灰に、RDF又はRPF、もしくは廃プラスチック類のいずれかを単独又は組み合わせて混合し、600℃以上に加熱して、同時に無害化することを特徴とする焼却灰等の無害化処理方法。RDF or RPF or waste plastics are used alone or in combination with incineration main ash or fly ash containing harmful organic chlorine compounds and harmful heavy metals, and heated to 600 ° C or higher to simultaneously detoxify A method for detoxifying incinerated ash etc.
JP2002365959A 2002-12-18 2002-12-18 Detoxication method of incineration ash and the like Pending JP2004195342A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006207909A (en) * 2005-01-27 2006-08-10 Actree Corp Waste and contaminant recycling device and method
JP2008275176A (en) * 2006-06-26 2008-11-13 Takuma Co Ltd Fluid bed-type combustion device using organic substance including chrome as fuel and detoxifying method of fly ash from fluid bed-type combustion device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006207909A (en) * 2005-01-27 2006-08-10 Actree Corp Waste and contaminant recycling device and method
JP2008275176A (en) * 2006-06-26 2008-11-13 Takuma Co Ltd Fluid bed-type combustion device using organic substance including chrome as fuel and detoxifying method of fly ash from fluid bed-type combustion device

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