JP2003117521A - Method for treating incineration flying ash - Google Patents
Method for treating incineration flying ashInfo
- Publication number
- JP2003117521A JP2003117521A JP2001319128A JP2001319128A JP2003117521A JP 2003117521 A JP2003117521 A JP 2003117521A JP 2001319128 A JP2001319128 A JP 2001319128A JP 2001319128 A JP2001319128 A JP 2001319128A JP 2003117521 A JP2003117521 A JP 2003117521A
- Authority
- JP
- Japan
- Prior art keywords
- group
- fly ash
- chelating agent
- incineration fly
- salt
- 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.)
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Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ごみ焼却炉等の各
種燃焼炉から排出される飛灰及び焼却灰（以下、これら
を併せて「焼却飛灰」と称する）の処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating fly ash and incinerated ash (hereinafter collectively referred to as "incinerated fly ash") discharged from various combustion furnaces such as a refuse incinerator.
【０００２】[0002]
【従来の技術】ごみ焼却炉などから排出される焼却飛灰
の中には、鉛、カドミウム、クロム、水銀、亜鉛、銅等
の人体に有害な重金属類が高濃度に含有されている。こ
のような焼却飛灰が雨水等の環境水と接触すると、重金
属類の溶出が起こり、土壌や地下水、河川、海水等を汚
染する。2. Description of the Prior Art Incinerator fly ash discharged from refuse incinerators contains heavy metals such as lead, cadmium, chromium, mercury, zinc and copper, which are harmful to the human body in high concentrations. When such incinerated fly ash comes into contact with environmental water such as rainwater, heavy metals are eluted and pollute soil, groundwater, rivers, seawater and the like.
【０００３】従来、焼却炉などから排出される焼却飛灰
中の重金属類の処理方法としては、焼却飛灰をジチオカ
ルバミン酸等の液体キレート剤で処理する方法などが採
用されている。このような液体キレート剤による焼却飛
灰の処理は、上水やプラント内再利用水（工程水）によ
って液体キレート剤を所定の濃度に希釈して、希釈液を
混練処理機に導き、そこで焼却飛灰と混練することによ
って行われている。このような処理によって、重金属類
がキレート剤と反応して水に不溶性の化合物を生成する
ことにより、重金属類の溶出が防止される。Conventionally, as a method of treating heavy metals in incineration fly ash discharged from an incinerator, a method of treating incineration fly ash with a liquid chelating agent such as dithiocarbamic acid has been adopted. The treatment of incineration fly ash with such liquid chelating agent dilutes the liquid chelating agent to a predetermined concentration with tap water or recycled water (process water) in the plant and guides the diluted liquid to a kneading processor where it is incinerated. It is done by kneading with fly ash. By such a treatment, the heavy metals react with the chelating agent to form a compound insoluble in water, whereby the elution of the heavy metals is prevented.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、近年、
焼却炉などからダイオキシン類が放出されるのを防ぐた
めに、活性炭類を焼却炉の煙道に添加してダイオキシン
類を除去することが行われ始めている。このように、活
性炭類を添加された焼却飛灰に、モノアミンをベースと
するジチオカルバミン酸を重金属類処理用のキレート剤
として加えると、キレート剤化合物の分子が小さいため
に活性炭中の細孔内に吸着されてしまって、重金属類と
反応しなくなり、重金属類の溶出防止が図れなくなると
いう問題が発生した。However, in recent years,
In order to prevent the emission of dioxins from incinerators, etc., it has been started to remove activated dioxins by adding activated carbon to the flue of the incinerator. Thus, when incineration fly ash to which activated carbons have been added, diaminecarbamine acid based on monoamine is added as a chelating agent for treating heavy metals, the molecules of the chelating agent compound are small, so that the pores in the activated carbon are Since it has been adsorbed, it no longer reacts with heavy metals, and it is impossible to prevent the elution of heavy metals.
【０００５】本発明は、このような従来技術の問題を解
決し、活性炭を添加した焼却飛灰に対しても、重金属類
溶出防止処理を効果的に行うことのできる焼却飛灰の処
理方法を提供することを目的とする。The present invention solves the above problems of the prior art and provides a method for treating incineration fly ash which can effectively prevent heavy metal elution from incineration fly ash to which activated carbon is added. The purpose is to provide.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明者らは、鋭意研究を重ねた結果、液体キレ
ート剤としてある程度の分子量以上のものを用いること
により、活性炭を添加された焼却飛灰に関しても、それ
からの重金属類の溶出を効果的に防止することができる
ことを見出し、本発明を完成するに至った。即ち、本発
明の一態様は、燃焼炉からの焼却飛灰に活性炭を加え、
更に液体キレート剤を加えて混練することによって焼却
飛灰を処理する方法において、液体キレート剤化合物と
して、硫黄原子を含む塩形成性若しくは錯体形成性の官
能基を有する分子量２００以上の化合物を用いることを
特徴とする方法に関する。In order to achieve the above object, the inventors of the present invention have conducted extensive studies and as a result, as a result, by using a liquid chelating agent having a certain molecular weight or more, activated carbon was added. Also with respect to incineration fly ash, it was found that the elution of heavy metals from it can be effectively prevented, and the present invention has been completed. That is, one aspect of the present invention, activated carbon is added to the incineration fly ash from the combustion furnace,
Further, in the method of treating incineration fly ash by adding a liquid chelating agent and kneading, using a compound having a molecular weight of 200 or more having a salt-forming or complex-forming functional group containing a sulfur atom as a liquid chelating agent compound. To a method characterized by.
【０００７】[0007]
【発明の実施の形態】本発明方法において、重金属類捕
捉剤として用いられる液体キレート剤化合物としては、
硫黄原子を含む塩形成性若しくは錯体形成性の官能基を
有する分子量２００以上の化合物が用いられる。かかる
液体キレート剤化合物の具体例としては、例えば、炭素
数３〜１６の鎖状又はシクロアルキルジスルホン酸；１
〜４個の水素原子が水酸基又はアルキルエーテル基で置
換されていてもよいベンゼンジスルホン酸；更に好まし
いものとして、炭素数１〜８の鎖状又はシクロアルキル
ジキサントゲン酸；炭素数１〜１６の鎖状又はシクロア
ルキルトリキサントゲン酸；１〜４個の水素原子が水酸
基又はアルキルエーテル基で置換されていてもよいフェ
ニルジキサントゲン酸；炭素数２〜３２の鎖状又はシク
ロアルキルビスチオカルバミン酸；炭素数１〜３２の鎖
状又はシクロアルキルトリスチオカルバミン酸；１〜４
個の水素原子が水酸基又はアルキルエーテル基で置換さ
れていてもよいフェニルビスチオカルバミン酸；炭素数
１０〜１６のアルキルジチオール；炭素数８〜１６のア
ルキルトリチオール；１〜５個の水素原子が水酸基又は
アルキルエーテル基で置換されていてもよいジチオフェ
ノール；炭素数１０〜１６のアルキルジチオエーテル；
炭素数９〜１６の鎖状又はシクロアルキルジチオエステ
ル；炭素数６〜１６の鎖状又はシクロアルキルジチオウ
レイド；炭素数１〜１６の鎖状又はシクロアルキルトリ
チオウレイド；１〜５個の水素原子が水酸基又はアルキ
ルエーテル基で置換されていてもよいフェニルジチオウ
レイド；ポリアミン類と二硫化炭素との反応物；分子量
４０００以下のポリエチレンイミンと二硫化炭素との反
応物；ポリアミン類とエピハロヒドリンとが重縮合した
分子量４５００以下の重縮合物ポリアミンと二硫化炭素
との反応物；分子量４０００以下のポリビニルアミンと
二硫化炭素との反応物；などを挙げることができる。な
お、上記に示した化合物のうち、スルホン酸基、硫酸
基、キサントゲン酸基、チオカルバミン酸基、ジチオカ
ルバミン酸基、チオフェノール基を含む化合物は、リチ
ウム塩、ナトリウム塩、カリウム塩、アンモニウム塩、
炭素数１〜８のモノアルキルアミン塩、炭素数１〜８の
ジアルキルアミン塩、炭素数１〜８のトリアルキルアミ
ン塩、炭素数１〜８の４級アンモニウム塩となっていて
もよい。BEST MODE FOR CARRYING OUT THE INVENTION In the method of the present invention, examples of the liquid chelating agent compound used as a heavy metal scavenger include:
A compound having a salt-forming or complex-forming functional group containing a sulfur atom and having a molecular weight of 200 or more is used. Specific examples of such a liquid chelating agent compound include, for example, a chain or cycloalkyldisulfonic acid having 3 to 16 carbon atoms; 1
Benzenedisulfonic acid in which 4 hydrogen atoms may be substituted with a hydroxyl group or an alkyl ether group; more preferred is a chain or cycloalkyl dixanthogenic acid having 1 to 8 carbon atoms; a chain having 1 to 16 carbon atoms Or cycloalkyltrixanthogenic acid; phenyldixanthogenic acid in which 1 to 4 hydrogen atoms may be substituted with a hydroxyl group or an alkyl ether group; linear or cycloalkylbisthiocarbamic acid having 2 to 32 carbon atoms; carbon Number 1 to 32 chain or cycloalkyl tristhiocarbamic acid; 1 to 4
Phenylbisthiocarbamic acid in which one hydrogen atom may be substituted with a hydroxyl group or an alkyl ether group; an alkyldithiol having 10 to 16 carbon atoms; an alkyltrithiol having 8 to 16 carbon atoms; Dithiophenol optionally substituted with a hydroxyl group or an alkyl ether group; an alkyl dithioether having 10 to 16 carbon atoms;
C9-C16 chain or cycloalkyldithioester; C6-C16 chain or cycloalkyldithioureide; C1-C16 chain or cycloalkyltrithioureide; 1-5 hydrogen atoms Phenyldithioureido optionally substituted with a hydroxyl group or an alkyl ether group; a reaction product of polyamines with carbon disulfide; a reaction product of polyethyleneimine having a molecular weight of 4000 or less with carbon disulfide; polyamines with epihalohydrin Examples thereof include a condensed polycondensate having a molecular weight of 4500 or less and a reaction product of carbon disulfide; a reaction product of polyvinylamine having a molecular weight of 4000 or less and carbon disulfide; Note that among the compounds shown above, compounds containing a sulfonic acid group, a sulfuric acid group, a xanthogenic acid group, a thiocarbamic acid group, a dithiocarbamic acid group, and a thiophenol group are lithium salts, sodium salts, potassium salts, ammonium salts,
It may be a monoalkylamine salt having 1 to 8 carbon atoms, a dialkylamine salt having 1 to 8 carbon atoms, a trialkylamine salt having 1 to 8 carbon atoms, or a quaternary ammonium salt having 1 to 8 carbon atoms.
【０００８】上記に示した化合物の中で特に好ましいも
のは、炭素数１〜３２の鎖状又はシクロアルキルトリス
ジチオカルバミン酸；炭素数１〜３２の鎖状又はシクロ
アルキルテトラキスジチオカルバミン酸；１〜４個の水
素原子が水酸基又はアルキルエーテル基で置換されてい
てもよいフェニルビスジチオカルバミン酸；ポリアミン
類と二硫化炭素との反応物；分子量４０００以下のポリ
エチレンイミンと二硫化炭素との反応物；のアルカリ金
属塩及びジアルキルアミン塩である。Among the compounds shown above, particularly preferred are linear or cycloalkyl trisdithiocarbamic acid having 1 to 32 carbon atoms; linear or cycloalkyl tetrakisdithiocarbamic acid having 1 to 32 carbon atoms; 1 to 4 Alkali metal of phenylbisdithiocarbamic acid, in which hydrogen atom of which may be substituted with hydroxyl group or alkyl ether group; reaction product of polyamines and carbon disulfide; reaction product of polyethyleneimine having a molecular weight of 4000 or less and carbon disulfide; Salts and dialkylamine salts.
【０００９】本発明方法において好ましく用いることの
できる液体キレート剤化合物の幾つかを製造するための
好ましい出発原料として用いられるポリアミン類として
は、窒素原子に１個又は２個の活性水素原子が結合して
なるイミノ基又はアミノ基を２個以上有する化合物が挙
げられ、例えば、エチレンジアミン、プロピレンジアミ
ン、ブチレンジアミン、ヘキサメチレンジアミン、ジエ
チレントリアミン、ジプロピレントリアミン、ジブチレ
ントリアミン、トリエチレンテトラミン、トリプロピレ
ンテトラミン、トリブチレンテトラミン、テトラエチレ
ンペンタミン、テトラプロピレンペンタミン、テトラブ
チレンペンタミン、ペンタエチレンヘキサミン等のポリ
アルキレンポリアミン；フェニレンジアミン、キシレン
ジアミン、イミノビスプロピルアミン、モノメチルアミ
ノプロピルアミン、メチルイミノビスプロピルアミン、
１，３−ビス（アミノメチル）シクロヘキサン、メラミ
ン、ピペラジン、１−アミノエチルピペラジン、ジアミ
ノフェニルエーテルなどが挙げられる。The polyamines used as preferred starting materials for preparing some of the liquid chelating agent compounds that can be preferably used in the process of the present invention include nitrogen atoms to which one or two active hydrogen atoms are bonded. And a compound having two or more imino groups or amino groups. Polyalkylenepolyamines such as butylenetetramine, tetraethylenepentamine, tetrapropylenepentamine, tetrabutylenepentamine, pentaethylenehexamine; phenylenediamine, xylenediamine, imino Scan propylamine, monomethyl aminopropyl amine, methyl iminobispropylamine,
1,3-bis (aminomethyl) cyclohexane, melamine, piperazine, 1-aminoethylpiperazine, diaminophenyl ether and the like can be mentioned.
【００１０】ポリアミン類を出発物質とする液体キレー
ト剤化合物のうちで、本発明方法において特に好ましく
用いることのできるものは、ピペラジン、エチレンジア
ミン、Ｎ，Ｎ’−ジメチルエチレンジアミンと二硫化炭
素との反応物のアルカリ金属塩及びアミン塩である。特
に好ましいものの具体例としては、ピペラジンと二硫化
炭素との反応物のナトリウム塩（ピペラジンビスジチオ
カルバミン酸ナトリウム）、ピペラジンと二硫化炭素と
の反応物のカリウム塩（ピペラジンビスジチオカルバミ
ン酸カリウム）、エチレンジアミンと二硫化炭素との反
応物のカリウム塩、Ｎ，Ｎ’−ジメチルエチレンジアミ
ンと二硫化炭素との反応物のナトリウム塩、ジエチレン
トリアミンと二硫化炭素との反応物のカリウム塩、ピペ
ラジンと二硫化炭素との反応物のジエチルアミン塩、ピ
ペラジンと二硫化炭素との反応物のジ−ｎ−ブチルアミ
ン塩、エチレンジアミンと二硫化炭素との反応物のジメ
チルアミン塩、Ｎ，Ｎ’−ジメチルエチレンジアミンと
二硫化炭素との反応物のジイソプロピルアミン塩、ジエ
チレントリアミンと二硫化炭素との反応物のジ−ｎ−プ
ロピルアミン塩などが挙げられる。最も好ましいのは、
ピペラジンと二硫化炭素との反応物のジエチルアミン
塩、ピペラジンと二硫化炭素との反応物のジ−ｎ−ブチ
ルアミン塩である。Among the liquid chelating agent compounds starting from polyamines, those which can be particularly preferably used in the method of the present invention are piperazine, ethylenediamine, N, N'-dimethylethylenediamine and a reaction product of carbon disulfide. Alkali metal salts and amine salts of Specific examples of particularly preferable ones include sodium salt of a reaction product of piperazine and carbon disulfide (sodium piperazine bisdithiocarbamate), potassium salt of a reaction product of piperazine and carbon disulfide (potassium piperazine bisdithiocarbamate), ethylenediamine and A potassium salt of a reaction product of carbon disulfide, a sodium salt of a reaction product of N, N′-dimethylethylenediamine and carbon disulfide, a potassium salt of a reaction product of diethylenetriamine and carbon disulfide, and a piperazine product of carbon disulfide. Reaction product diethylamine salt, piperazine and carbon disulfide reaction product di-n-butylamine salt, ethylenediamine and carbon disulfide reaction product dimethylamine salt, N, N'-dimethylethylenediamine and carbon disulfide Diisopropylamine salt of reaction product, diethylenetriamine And di -n- propylamine salt of the reaction product of carbon disulfide and the like. Most preferred is
It is a diethylamine salt of a reaction product of piperazine and carbon disulfide, and a di-n-butylamine salt of a reaction product of piperazine and carbon disulfide.
【００１１】本発明方法においては、上記の液体キレー
ト剤化合物を水で希釈して用いるが、その際、液体キレ
ート剤化合物が１〜２５重量％の濃度となるように希釈
することが好ましい。In the method of the present invention, the above liquid chelating agent compound is diluted with water before use. At that time, it is preferable to dilute the liquid chelating agent compound to a concentration of 1 to 25% by weight.
【００１２】本発明方法において、活性炭を含む焼却飛
灰に対する液体キレート剤化合物の好ましい添加率は、
液体キレート剤化合物の重量として、０．５〜４０重量
％、より好ましくは１〜１５重量％である。In the method of the present invention, the preferable addition rate of the liquid chelating agent compound to the incineration fly ash containing activated carbon is
The weight of the liquid chelating agent compound is 0.5 to 40% by weight, more preferably 1 to 15% by weight.
【００１３】本発明方法においては、活性炭を添加され
た焼却飛灰に液体キレート剤を加えて混練するのである
が、その際に好ましく使用することのできる混練機とし
ては、押出し造粒機、転動造粒機などを用いることがで
きる。混練りは、常温〜８０℃程度の温度で、混合物が
均一な状態で混合されるまで行うことが望ましい。な
お、混練りによって発熱が起こるので、一般に、混練機
に加熱手段を設ける必要はない。In the method of the present invention, a liquid chelating agent is added to incineration fly ash to which activated carbon is added, and the mixture is kneaded. As a kneading machine that can be preferably used in this case, an extrusion granulator, A dynamic granulator or the like can be used. The kneading is preferably performed at a temperature of room temperature to 80 ° C. until the mixture is mixed in a uniform state. Since heat is generated by kneading, it is generally unnecessary to provide a heating means in the kneader.
【００１４】本発明方法によって液体キレート剤と混練
されて重金属類が水に不溶性の化合物に転化された焼却
飛灰は、そのまま外部に廃棄するか、或いは、一定時間
養生させた後、外部に廃棄することができる。The incineration fly ash in which the heavy metals are converted into water-insoluble compounds by kneading with the liquid chelating agent according to the method of the present invention is either disposed of outside as it is, or after curing for a certain period of time, it is disposed outside. can do.
【００１５】更に、本発明は、上記に説明した液体キレ
ート剤にも関する。即ち、本発明の他の態様は、硫黄原
子を含む塩形成性若しくは錯体形成性の官能基を有する
分子量２００以上の化合物を含む、燃焼炉からの焼却飛
灰の重金属溶出防止剤に関する。本発明に係る液体キレ
ート剤は、活性炭を添加された燃焼炉からの焼却飛灰の
重金属溶出防止処理を行うのに特に好適に用いることが
できる。The present invention also relates to the liquid chelating agents described above. That is, another embodiment of the present invention relates to a heavy metal elution inhibitor for incineration fly ash from a combustion furnace, which contains a compound having a salt-forming or complex-forming functional group containing a sulfur atom and having a molecular weight of 200 or more. The liquid chelating agent according to the present invention can be particularly preferably used for the heavy metal elution prevention treatment of incineration fly ash from a combustion furnace to which activated carbon is added.
【００１６】[0016]
【実施例】以下の実施例によって本発明をより具体的に
説明するが、これらは本発明を限定するものではない。The present invention will be described more specifically by the following examples, but these do not limit the present invention.
【００１７】実施例１，比較例１
焼却飛灰に活性炭を１０ｗ／ｗ％添加してダイオキシン
類の除去処理を行った焼却飛灰に、セメントを１５ｗ／
ｗ％加えてよく混合し、次に水及び液体キレート剤を焼
却飛灰に加え、十分混練して一日間養生した。その後、
焼却飛灰サンプルを５ｍｍ以下に粉砕し、環境庁告示１
３号法の溶出試験の手法にしたがって溶出液を調製し、
重金属類の溶出濃度の分析を行った。液体キレート剤と
しては、N1,N2,N3,N4-テトラジチオカルボキシテトラエ
チレンペンタミンナトリウム塩（分子量５８２）の５７
％溶液（実施例１）及びジエチルアミノカルバミン酸
（分子量１８７）の４４％溶液（比較例１）を用いた。
また、液体キレート剤を添加せずに同様の重金属類溶出
実験を行った。これらの結果を表１及び図１に示す。な
お、表１中、液体キレート剤の添加量（ｗ／ｗ％）は、
液体キレート剤化合物の重量換算である。Example 1 and Comparative Example 1 10 w / w% of activated carbon was added to incineration fly ash to remove dioxins, and 15 w / cement of cement was added to the incineration fly ash.
w% was added and mixed well, then water and liquid chelating agent were added to the incineration fly ash, and the mixture was thoroughly kneaded and cured for one day. afterwards,
The incineration fly ash sample was crushed to 5 mm or less and notified by the Environmental Agency
Prepare the eluate according to the method of elution test of Method 3,
The elution concentration of heavy metals was analyzed. As the liquid chelating agent, 57 of N 1 , N 2 , N 3 , N 4 -tetradithiocarboxytetraethylenepentamine sodium salt (molecular weight 582) is used.
% Solution (Example 1) and a 44% solution of diethylaminocarbamic acid (molecular weight 187) (Comparative Example 1) were used.
In addition, the same heavy metal elution experiment was conducted without adding the liquid chelating agent. The results are shown in Table 1 and FIG. In Table 1, the addition amount (w / w%) of the liquid chelating agent is
It is the weight conversion of the liquid chelating agent compound.
【００１８】本発明による処理前の焼却飛灰の鉛の含有
量は４，０００ｍｇ／ｋｇであった。The lead content of the incineration fly ash before treatment according to the present invention was 4,000 mg / kg.
【００１９】[0019]
【表１】 [Table 1]
【００２０】表１及び図１に示す結果から、分子量が低
い液体キレート剤（分子量１８７）を用いた比較例１の
場合、焼却飛灰からの鉛の溶出量を埋立基準値である
０．３ｍｇ／Ｌ以下にするのに液体キレート剤の添加率
を７％以上にする必要があったが、分子量が高い本発明
に係る液体キレート剤（分子量５８２）を用いた実施例
１の場合には、半分以下の３．５％の添加率で鉛の溶出
量を０．３ｍｇ／Ｌ以下にすることができたことが分か
る。即ち、実施例１では、液体キレート剤の濃度が低い
にも拘わらず、添加率が半分以下で鉛の溶出量を比較例
１と同等以上に抑えることができる。From the results shown in Table 1 and FIG. 1, in the case of Comparative Example 1 using a liquid chelating agent having a low molecular weight (molecular weight 187), the lead elution amount from the incineration fly ash was 0.3 mg, which is a landfill standard value. Although it was necessary to make the addition rate of the liquid chelating agent 7% or more in order to reduce the amount to / L or less, in the case of Example 1 using the liquid chelating agent (molecular weight 582) according to the present invention having a high molecular weight, It can be seen that the lead elution amount could be reduced to 0.3 mg / L or less at the addition rate of 3.5%, which is less than half. That is, in Example 1, although the concentration of the liquid chelating agent is low, the amount of lead elution can be suppressed to be equal to or more than that in Comparative Example 1 when the addition rate is half or less.
【００２１】実施例２，比較例２
液体キレート剤として、ピペラジン−Ｎ，Ｎ’−ビスカ
ルボチオ酸カリウム塩（分子量３１４）の４０％溶液
（実施例２）及びジエチルアミノカルバミン酸カリウム
塩（分子量１８７）の５７％溶液を用いた他は、実施例
１／比較例１と同様の実験を行った。結果を表２及び図
２に示す。なお、実施例２／比較例２において用いた処
理前の焼却飛灰の鉛の含有量は３，０００ｍｇ／ｋｇで
あった。Examples 2 and Comparative Example 2 As liquid chelating agents, 40% solution of piperazine-N, N'-biscarbothioic acid potassium salt (molecular weight 314) (Example 2) and diethylaminocarbamic acid potassium salt (molecular weight 187) were used. The same experiment as in Example 1 / Comparative example 1 was performed except that a 57% solution was used. The results are shown in Table 2 and FIG. The lead content of the incineration fly ash before treatment used in Example 2 / Comparative Example 2 was 3,000 mg / kg.
【００２２】[0022]
【表２】 [Table 2]
【００２３】表２及び図２に示す結果から、分子量が低
い液体キレート剤（分子量１８７）を用いた比較例２の
場合、焼却飛灰からの鉛の溶出量を埋立基準値である
０．３ｍｇ／Ｌ以下にするのに液体キレート剤の添加率
を６．１％以上にする必要があったが、分子量が高い本
発明に係る液体キレート剤（分子量３１４）を用いた実
施例２の場合には、４．２％の添加率で鉛の溶出量を
０．３ｍｇ／Ｌ以下にすることができたことが分かる。
即ち、実施例２では、液体キレート剤の濃度が低いにも
拘わらず、添加率が２／３程度で鉛の溶出量を比較例２
と同等以上に抑えることができる。From the results shown in Table 2 and FIG. 2, in the case of Comparative Example 2 in which the liquid chelating agent having a low molecular weight (molecular weight 187) was used, the lead elution amount from the incineration fly ash was 0.3 mg, which is a landfill standard value. It was necessary to make the addition rate of the liquid chelating agent 6.1% or more in order to reduce the amount to / L or less. It can be seen that the lead elution amount could be reduced to 0.3 mg / L or less at the addition rate of 4.2%.
That is, in Example 2, although the concentration of the liquid chelating agent was low, the amount of lead eluted was about 2/3 and the lead elution amount was compared.
Can be suppressed to the same level as or higher than.
【００２４】[0024]
【発明の効果】本発明方法によれば、活性炭を添加した
焼却飛灰に対しても、効果的に重金属類の溶出防止処理
を行うことができる。EFFECTS OF THE INVENTION According to the method of the present invention, heavy metal elution prevention treatment can be effectively performed on incineration fly ash to which activated carbon is added.
【図１】実施例１／比較例１の実験結果を示すグラフで
ある。FIG. 1 is a graph showing experimental results of Example 1 / Comparative example 1.
【図２】実施例２／比較例２の実験結果を示すグラフで
ある。FIG. 2 is a graph showing experimental results of Example 2 / Comparative example 2.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 柳澤 浩次郎 東京都大田区羽田旭町11番１号 株式会社 荏原製作所内 (72)発明者 池田 太 東京都大田区羽田旭町11番１号 株式会社 荏原製作所内 Ｆターム(参考） 4D004 AA36 AA37 AB03 AB07 CA34 CA47 CC06 CC11 DA00 DA10 DA20 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Kojiro Yanagisawa 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Co., Ltd. Inside the EBARA CORPORATION (72) Inventor Futa Ikeda 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Co., Ltd. Inside the EBARA CORPORATION F-term (reference) 4D004 AA36 AA37 AB03 AB07 CA34 CA47 CC06 CC11 DA00 DA10 DA20
Claims (6)
更に液体キレート剤を加えて混練することによって焼却
飛灰を処理する方法において、液体キレート剤化合物と
して、硫黄原子を含む塩形成性若しくは錯体形成性の官
能基を有する分子量２００以上の化合物を用いることを
特徴とする方法。1. Activated carbon is added to incineration fly ash from a combustion furnace,
Further, in the method of treating incineration fly ash by adding a liquid chelating agent and kneading, using a compound having a molecular weight of 200 or more having a salt-forming or complex-forming functional group containing a sulfur atom as a liquid chelating agent compound. A method characterized by.
が、ジチオカルバミン酸基、チオカルバミン酸基、チオ
アミド基、チオウレイド基、キサントゲン酸基、チオー
ル基、及びこれらのアルカリ金属塩、アンモニウム塩又
はアミン塩からなる群から選択される１種以上の官能基
である請求項１に記載の方法。2. A salt-forming or complex-forming functional group is a dithiocarbamic acid group, a thiocarbamic acid group, a thioamide group, a thioureido group, a xanthogenic acid group, a thiol group, or an alkali metal salt, ammonium salt or amine thereof. The method according to claim 1, which is one or more functional groups selected from the group consisting of salts.
量％となるように希釈して焼却飛灰に加える請求項１又
は２に記載の方法。3. The method according to claim 1, wherein the liquid chelating agent is diluted with water to a concentration of 1 to 25% by weight and added to the incineration fly ash.
焼却飛灰に対する添加率が、０．５〜４０重量％である
請求項１〜３のいずれかに記載の方法。4. The method according to claim 1, wherein the addition ratio of the liquid chelating agent compound to the incineration fly ash containing activated carbon is 0.5 to 40% by weight.
成性の官能基を有する分子量２００以上の化合物を含
む、燃焼炉からの焼却飛灰の重金属溶出防止剤。5. A heavy metal elution inhibitor for incineration fly ash from a combustion furnace, which comprises a compound having a salt-forming or complex-forming functional group containing a sulfur atom and having a molecular weight of 200 or more.
灰の重金属溶出防止処理を行うための請求項５に記載の
重金属溶出防止剤。6. The heavy metal elution preventing agent according to claim 5, which is used to prevent heavy metal elution from incineration fly ash from a combustion furnace to which activated carbon has been added.
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| JP2001319128A JP2003117521A (en) | 2001-10-17 | 2001-10-17 | Method for treating incineration flying ash |
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|---|---|---|---|
| JP2001319128A JP2003117521A (en) | 2001-10-17 | 2001-10-17 | Method for treating incineration flying ash |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005089565A (en) * | 2003-09-16 | 2005-04-07 | Miyoshi Oil & Fat Co Ltd | Heavy metal-immobilizing treatment agent and method for immobilizing heavy metal in solid substance |
| JP2007054769A (en) * | 2005-08-26 | 2007-03-08 | Miyoshi Oil & Fat Co Ltd | Metal immobilizing agent |
| JP2020044513A (en) * | 2018-09-20 | 2020-03-26 | ミヨシ油脂株式会社 | Treatment method of fly ashes containing carbon involving mercury |
| CN112375575A (en) * | 2020-11-24 | 2021-02-19 | 詹创雄 | Repairing agent for copper-cadmium polluted acid soil and preparation method thereof |
| CN114805153A (en) * | 2022-04-25 | 2022-07-29 | 重庆新离子环境科技有限公司 | Novel multi-chelating-site macromolecular fly ash chelating agent and preparation method and application thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08224560A (en) * | 1994-12-02 | 1996-09-03 | Tosoh Corp | Fixing of heavy metals in fly ash |
| JPH0966275A (en) * | 1995-09-01 | 1997-03-11 | Unitika Ltd | Treatment of fly ash |
| JPH0975892A (en) * | 1995-09-13 | 1997-03-25 | Tosoh Corp | Process of solidifying heavy metal in fly ash by low-molecular polyamine derivative |
| JPH10140132A (en) * | 1996-11-05 | 1998-05-26 | Nippon Soda Co Ltd | Heavy metal fixing agent |
| JPH10156308A (en) * | 1996-11-29 | 1998-06-16 | Ebara Corp | Treatment of alkaline fly ash |
| JPH10298533A (en) * | 1997-05-01 | 1998-11-10 | Mitsubishi Chem Corp | Heavy metal scavenger |
| JPH1133343A (en) * | 1997-07-24 | 1999-02-09 | Kanegafuchi Chem Ind Co Ltd | Blow agent for incinerator flue and flue gas treatment method |
| JP2001137663A (en) * | 1999-11-12 | 2001-05-22 | Mitsubishi Heavy Ind Ltd | Device and method of treating waste gas |
-
2001
- 2001-10-17 JP JP2001319128A patent/JP2003117521A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08224560A (en) * | 1994-12-02 | 1996-09-03 | Tosoh Corp | Fixing of heavy metals in fly ash |
| JPH0966275A (en) * | 1995-09-01 | 1997-03-11 | Unitika Ltd | Treatment of fly ash |
| JPH0975892A (en) * | 1995-09-13 | 1997-03-25 | Tosoh Corp | Process of solidifying heavy metal in fly ash by low-molecular polyamine derivative |
| JPH10140132A (en) * | 1996-11-05 | 1998-05-26 | Nippon Soda Co Ltd | Heavy metal fixing agent |
| JPH10156308A (en) * | 1996-11-29 | 1998-06-16 | Ebara Corp | Treatment of alkaline fly ash |
| JPH10298533A (en) * | 1997-05-01 | 1998-11-10 | Mitsubishi Chem Corp | Heavy metal scavenger |
| JPH1133343A (en) * | 1997-07-24 | 1999-02-09 | Kanegafuchi Chem Ind Co Ltd | Blow agent for incinerator flue and flue gas treatment method |
| JP2001137663A (en) * | 1999-11-12 | 2001-05-22 | Mitsubishi Heavy Ind Ltd | Device and method of treating waste gas |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005089565A (en) * | 2003-09-16 | 2005-04-07 | Miyoshi Oil & Fat Co Ltd | Heavy metal-immobilizing treatment agent and method for immobilizing heavy metal in solid substance |
| JP2007054769A (en) * | 2005-08-26 | 2007-03-08 | Miyoshi Oil & Fat Co Ltd | Metal immobilizing agent |
| JP2020044513A (en) * | 2018-09-20 | 2020-03-26 | ミヨシ油脂株式会社 | Treatment method of fly ashes containing carbon involving mercury |
| JP7046770B2 (en) | 2018-09-20 | 2022-04-04 | ミヨシ油脂株式会社 | Method for treating carbon-containing fly ash containing mercury |
| CN112375575A (en) * | 2020-11-24 | 2021-02-19 | 詹创雄 | Repairing agent for copper-cadmium polluted acid soil and preparation method thereof |
| CN114805153A (en) * | 2022-04-25 | 2022-07-29 | 重庆新离子环境科技有限公司 | Novel multi-chelating-site macromolecular fly ash chelating agent and preparation method and application thereof |
| CN114805153B (en) * | 2022-04-25 | 2024-01-23 | 重庆新离子环境科技有限公司 | Macromolecular fly ash chelating agent with multiple chelating sites and preparation method and application thereof |
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