JP3120430B2 - Treatment method for highly alkaline dust ash - Google Patents
Treatment method for highly alkaline dust ashInfo
- Publication number
- JP3120430B2 JP3120430B2 JP01249744A JP24974489A JP3120430B2 JP 3120430 B2 JP3120430 B2 JP 3120430B2 JP 01249744 A JP01249744 A JP 01249744A JP 24974489 A JP24974489 A JP 24974489A JP 3120430 B2 JP3120430 B2 JP 3120430B2
- Authority
- JP
- Japan
- Prior art keywords
- ash
- lead
- highly alkaline
- dust ash
- amount
- 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、鉛分を高濃度で含有する高アルカリ性集塵
灰、特に都市ゴミ焼却用の機械炉から発生する排ガスに
乾式又は半乾式で消石灰を吹き込み、これを電気集塵し
て得られる灰（以下、EP灰という）を固化処理して、鉛
溶出量を抑制させる方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a high-alkaline dust collection ash containing a high concentration of lead, in particular, a dry or semi-dry type exhaust gas generated from a mechanical furnace for incineration of municipal waste. The present invention relates to a method of blowing slaked lime and solidifying an ash (hereinafter referred to as EP ash) obtained by electrostatically collecting the slaked lime to suppress the amount of lead eluted.
〔従来の技術及び発明が解決しようとする課題〕 都市ゴミ焼却炉は、機械炉と流動床炉とに大別され、
発生する飛灰の性状も大きく異なっているが、機械炉よ
り生じるEP灰、特に発生する排ガスに塩化水素ガスを除
去するため、乾式又は半乾式で消石灰を吹き込む方式の
機械炉EP灰は、pH値が12以上の高アルカリ性を示し、ま
たCaCl2,NaCl,KCl等の塩類も大量に含有しているダスト
であり、通常このEP灰中には鉛分が500〜4000ppm程度の
高濃度で含有されている。このEP灰中の鉛分がどのよう
な形態で存在しているかは不明であり、塩化物、炭酸化
物、酸素酸化合物の形ではないかと推定されるが、いず
れにしてもこの鉛分の溶出量は高く、通常15〜80ppmで
あるため、EP灰からの鉛の溶出が公害防止上問題とな
る。この場合、EP灰を単にセメント類を用いて固化して
も、ある程度鉛溶出を抑制することはできるが、なお十
分でなく、このためEP灰からの鉛溶出を有効に防止する
手段が要望される。[Problems to be solved by conventional technology and invention] Municipal refuse incinerators are roughly classified into mechanical furnaces and fluidized bed furnaces,
The properties of fly ash generated are also very different, but EP ash generated from a mechanical furnace, especially a mechanical furnace EP ash that blows slaked lime dry or semi-dry to remove hydrogen chloride gas from the generated exhaust gas, It is highly alkaline with a value of 12 or more, and also contains a large amount of salts such as CaCl 2 , NaCl, and KCl.Typically, this EP ash contains lead at a high concentration of about 500 to 4000 ppm. Have been. It is unknown what form the lead in the EP ash is in, and it is presumed that it is in the form of chlorides, carbonates, and oxyacid compounds. Since the amount is high, usually 15 to 80 ppm, elution of lead from EP ash is a problem in pollution prevention. In this case, lead leaching can be suppressed to some extent by simply solidifying the EP ash using cements, but it is still not sufficient, and a means for effectively preventing lead leaching from the EP ash is required. You.
本発明は上記要望に応えるためになされたもので、機
械炉EP灰の如き鉛分を含有する高アルカリ性集塵灰を処
理して鉛溶出を効果的に抑制する方法を提供することを
目的とする。The present invention has been made to meet the above-mentioned demands, and an object of the present invention is to provide a method for treating lead-containing highly alkaline dust ash, such as a mechanical furnace EP ash, to effectively suppress lead elution. I do.
本発明者は上記目的を達成するため種々検討を行なっ
た結果、鉛分を含有する高アリカリ性集塵灰に対し硫酸
第一鉄、硫酸アルミニウム等の水可溶性硫酸塩とブレー
ン値が5000cm2/g以上のセメント類を特定割合で添加
し、更に水を加えて固化することにより、加水量が少な
くとも取り扱い易い緻密な固化物が得られると共に、該
固化物からの鉛溶出量が十分に抑制されることを知見
し、本発明をなすに至ったものである。The present inventor has conducted various studies to achieve the above object, and as a result, it has been found that water-soluble sulfates such as ferrous sulfate and aluminum sulfate and a Blaine value of 5000 cm 2 / g or more cements are added at a specific ratio, and further solidified by adding water, thereby obtaining a dense solidified substance having an amount of water of at least easy to handle, and the amount of lead eluted from the solidified substance is sufficiently suppressed. This led to the achievement of the present invention.
従って、本発明は、鉛分を含有する高アルカリ集塵灰
に水可溶性硫酸塩とブレーン値が5000cm2/g以上のセメ
ント類とをこれらの総量が上記集塵灰に対して10〜30重
量％であり、かつセメント類と硫酸塩とが硫酸塩を内割
で20〜60重量％とする比率で配合し、これに水を加えて
固化することを特徴とする高アルカリ性集塵灰の処理方
法を提供する。Therefore, the present invention provides a highly alkaline dust-containing ash containing lead and a water-soluble sulfate and a cement having a Blaine value of 5000 cm 2 / g or more, the total amount of which is 10 to 30 wt. %, And a mixture of cements and sulfates in a proportion of 20 to 60% by weight of the sulfates, and water is added to the mixture to solidify it, thereby treating the highly alkaline dust ash. Provide a way.
以下、本発明につき更に詳述する。 Hereinafter, the present invention will be described in more detail.
本発明で処理される集塵灰は、鉛分を含有し、高アル
カリ性のものであり、特に乾式又は半乾式で消石灰を吹
き込んで塩化水素ガスを除去する方式の機械炉からのEP
灰が有効に処理される。このEP灰は、上述したようにpH
が通常12以上で、鉛分を500〜4000ppm程度含有し、その
溶出量が15〜80ppm程度のものであり、またCa分をCaOと
して通常25〜50％（重量％、以下同じ）程度含み、平均
粒度が74μｍ以下のものである。The dust ash treated in the present invention contains a lead component and is highly alkaline.Especially, EP from a mechanical furnace of a system in which slaked lime is blown in a dry or semi-dry system to remove hydrogen chloride gas is used.
Ash is effectively treated. This EP ash has a pH as described above.
Is usually 12 or more, contains about 500 to 4000 ppm of lead, and the elution amount is about 15 to 80 ppm, and usually contains about 25 to 50% (wt%, the same applies hereinafter) of Ca as CaO, The average particle size is 74 μm or less.
本発明は、上記集塵灰を処理するに当り、水可溶性硫
酸塩を配合するものであるが、水可溶性硫酸塩として
は、水に溶解して酸性を示す硫酸第一鉄、硫酸アルミニ
ウム等が用いられる。In the present invention, in treating the dust ash, a water-soluble sulfate is blended. Examples of the water-soluble sulfate include ferrous sulfate, aluminum sulfate, and the like, which are acidic when dissolved in water. Used.
セメント類としては、ブレーン値5000cm2/g以上のも
のを用いるもので、例えば超早強セメント、ジェットセ
メント、ジェットセメントクリンカー粉砕物などが使用
される。上記セメント類としては、ジェットセメント等
の特殊セメントのブレーン値5000cm2/g以上のものの効
果が高く、とりわけジェットセメントクリンカー粉砕物
はその崇高な微粉による効果が非常に優れている。As the cements, those having a Blaine value of 5,000 cm 2 / g or more, for example, ultra-high strength cement, jet cement, pulverized jet cement clinker and the like are used. As the above cements, special cements having a Blaine value of 5000 cm 2 / g or more of jet cement or the like have a high effect, and in particular, pulverized jet cement clinker is very excellent in the effect of the fine powder.
上記硫酸塩とセメント類とからなる抑制材の使用量
は、集塵灰に対して10〜30％、特に15〜30％とする。ま
た、セメント類と硫酸塩との比率は硫酸塩を内割で20〜
60％、特に25〜60％とする。The amount of the suppressant composed of the above-mentioned sulfate and cement is 10 to 30%, particularly 15 to 30%, based on the dust ash. In addition, the ratio of cement to sulfate is 20-
60%, especially 25-60%.
集塵灰に硫酸塩とセメント類を添加し、これに水を加
えて混練成形する場合、コンティンアスニーダータイプ
の混練成形機等を使用して固化成形することができる
が、この場合水の添加量は集塵灰に対して25〜30％、特
に30〜40％とすることが好ましく、本発明によれば最小
の加水量で鉛溶出量の抑制された緻密な成形体を形成す
ることができる。When sulfate and cement are added to the dust ash and water is added to the mixture for kneading and molding, solidification and molding can be performed using a continuous asneader-type kneading and molding machine. The addition amount is preferably 25 to 30%, particularly preferably 30 to 40%, based on the collected ash. According to the present invention, it is possible to form a dense compact with a minimum amount of water and a suppressed amount of lead elution. Can be.
以下、実施例と比較例を示し、本発明を具体的に説明
するが、本発明は下記の実施例に制限されるものではな
い。Hereinafter, the present invention will be described specifically with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples.
〔実施例１〕 都市ゴミ焼却機械炉より発生した排ガスに塩化水素ガ
スを除去するために乾式で消石灰を吹き込み、この排ガ
スを電気集塵機で処理することによって得られたEP灰に
対し、第１表に示す抑制材を添加し、更に水を添加して
固化し、成形物を得た。Example 1 Slaked lime was blown dry to remove hydrogen chloride gas from flue gas generated from a municipal garbage incinerator furnace, and EP ash obtained by treating the flue gas with an electric dust collector is shown in Table 1. Was added, and water was further added to solidify to obtain a molded product.
次に、この成形物の鉛溶出量を測定した。結果を第１
表に示す。Next, the lead elution amount of this molded product was measured. First result
It is shown in the table.
なお、上記EP灰の性状は下記の通りである。 The properties of the EP ash are as follows.
pH :12.5 鉛含有量:1300mg/kg 鉛溶出量:72.7mg/ 〔実施例２〕 下記性状のEP灰を使用し、実施例１と同様に処理した
後、成形物の鉛溶出量を測定した。結果を第２表に示
す。pH: 12.5 Lead content: 1300 mg / kg Lead elution amount: 72.7 mg / kg Example 2 Using EP ash having the following properties and treating it in the same manner as in Example 1, the amount of lead eluted from the molded product was measured. The results are shown in Table 2.
EP灰の性状 pH :12.8 軽装溶重:0.36 重装溶重:0.48 鉛溶出量:54.0mg/ 〔実施例３〕 pH12.8で、鉛が有量3800mg/kg、鉛溶出量43.2mg/の
EP灰を使用し、実施例１と同様に処理した後、成形物の
鉛溶出量を測定した。結果を第３表に示す。EP ash properties pH: 12.8 Light weight: 0.36 Heavy weight: 0.48 Lead elution: 54.0 mg / [Example 3] pH of 12.8, lead content of 3800 mg / kg, lead elution amount of 43.2 mg / kg
After treating in the same manner as in Example 1 using EP ash, the lead elution amount of the molded product was measured. The results are shown in Table 3.
〔発明の効果〕 本発明によれば、鉛を含有する高アルカリ性集塵灰を
処理して、鉛溶出量の抑制された固化物を確実に得るこ
とができる。 [Effects of the Invention] According to the present invention, a highly alkaline dust-containing ash containing lead can be treated to reliably obtain a solidified product in which the amount of lead eluted is suppressed.
Claims (1)
可溶性硫酸塩とブレーン値が5000cm2/g以上のセメント
類とをこれらの総量が上記集塵灰に対して10〜30重量％
であり、かつセメント類と硫酸塩とが硫酸塩を内割で20
〜60重量％とする比率で配合し、これに水を加えて固化
することを特徴とする高アリカリ性集塵灰の処理方法。(1) A water-soluble sulfate and a cement having a Blaine value of 5,000 cm 2 / g or more are added to a lead-containing highly alkaline dust ash in a total amount of 10 to 30 to the dust ash. weight%
And the cements and sulfates are 20
A method for treating highly alkaline dust ash, wherein the ash is mixed at a ratio of up to 60% by weight and solidified by adding water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01249744A JP3120430B2 (en) | 1989-09-26 | 1989-09-26 | Treatment method for highly alkaline dust ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01249744A JP3120430B2 (en) | 1989-09-26 | 1989-09-26 | Treatment method for highly alkaline dust ash |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03109984A JPH03109984A (en) | 1991-05-09 |
| JP3120430B2 true JP3120430B2 (en) | 2000-12-25 |
Family
ID=17197569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01249744A Expired - Fee Related JP3120430B2 (en) | 1989-09-26 | 1989-09-26 | Treatment method for highly alkaline dust ash |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3120430B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3213054B2 (en) * | 1992-05-07 | 2001-09-25 | 同和鉱業株式会社 | Treatment method for incinerated ash containing heavy metals |
| JPH06343943A (en) * | 1993-06-04 | 1994-12-20 | Nippon Jiryoku Senko Kk | Treatment method of incineration ash of combustible dust |
| JP4840312B2 (en) * | 2007-09-25 | 2011-12-21 | 栗田工業株式会社 | Heavy metal fixing agent and ash treatment method using the same |
| JP4867879B2 (en) * | 2007-09-25 | 2012-02-01 | 栗田工業株式会社 | Heavy metal fixing agent and ash treatment method using the same |
| JP6594001B2 (en) * | 2015-02-27 | 2019-10-23 | 三菱日立パワーシステムズ株式会社 | Waste cement solidification processing equipment |
| PL3263238T3 (en) | 2015-02-27 | 2020-10-05 | Mitsubishi Hitachi Power Systems, Ltd. | Zero liquid discharge exhaust gas processing system and method. |
-
1989
- 1989-09-26 JP JP01249744A patent/JP3120430B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03109984A (en) | 1991-05-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100187307B1 (en) | Process for incinerating waste | |
| JP5159971B1 (en) | Method for removing radioactive cesium and method for producing fired product | |
| JP5896836B2 (en) | Method for producing fired product | |
| JP3244822B2 (en) | A method for stabilizing and solidifying products obtained by incineration of kitchen garbage, such as dross, fly ash and soot purification residues, products obtained by this method and substances for carrying out this method | |
| JP6628282B2 (en) | Method for removing radioactive cesium and method for producing fired product | |
| JP3120430B2 (en) | Treatment method for highly alkaline dust ash | |
| JPH10137716A (en) | Waste treating material and treatment of waste | |
| JP2004526555A (en) | Method for inactivating ash, artificial pozzolan obtained by the method | |
| JP3683025B2 (en) | Waste disposal method | |
| JPH09299905A (en) | Harmful waste treating agent and its treatment | |
| JP3867307B2 (en) | Dust disposal method | |
| JP2000274646A (en) | Melting method for coal ash and fly ash of refuse incineration | |
| JPH09122616A (en) | Treatment agent and treatment method for harmful waste | |
| JP2010051840A (en) | Agent for treating flue gas, and method for treating flue gas | |
| JPH11128876A (en) | Treatment of incineration fly ash containing used waste gas treating agent | |
| JP2695589B2 (en) | Exhaust gas and dust collection method | |
| JP2000042360A (en) | Blowing agent for flue and its use method | |
| JP3491712B2 (en) | Exhaust gas treatment material | |
| JPH0913032A (en) | Production of solidifying agent | |
| JP3234189B2 (en) | Method and apparatus for effective use of waste incineration fly ash | |
| JPH09248423A (en) | Processing agent for exhaust gas and treatment of exhaust gas and fly ash | |
| JP3214011B2 (en) | Method for treating highly alkaline dust ash and lead sequestering agent for highly alkaline dust ash | |
| JPH04358582A (en) | Material controlling lead elusion and treating method for high-alkaline collected dust | |
| JP2003245633A (en) | Heavy metal fixing agent for incineration fly ash or main ash comprising combination of metal dithiocarbamate and inorganic acid salt | |
| JP2003181243A (en) | Method of treating waste gas, soot and dust |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |