CN1268448C - Treatment method for stabilizing flying ash in burning garbage - Google Patents
Treatment method for stabilizing flying ash in burning garbage Download PDFInfo
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- CN1268448C CN1268448C CN 200410067071 CN200410067071A CN1268448C CN 1268448 C CN1268448 C CN 1268448C CN 200410067071 CN200410067071 CN 200410067071 CN 200410067071 A CN200410067071 A CN 200410067071A CN 1268448 C CN1268448 C CN 1268448C
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Abstract
本发明涉及垃圾焚烧飞灰稳定化处理方法,系环境化学技术领域。本发明方法的特征是采用有机多聚磷酸及其盐类化合物作为稳定剂。稳定化处理方法的步骤如下:取一定量的上述稳定剂溶于适量水中,配成溶液,然后将该稳定剂水溶液加入到一定量的焚烧飞灰中,均匀搅拌,配成稳定的基质固体;稳定剂与垃圾焚烧飞灰的配合比例为1∶100~5∶100;采用的有机多聚磷酸及其盐类化合物为羟基亚乙基二膦酸、氨基三甲叉膦酸、乙二胺四甲叉膦酸钠、二乙烯三胺五甲叉膦酸或多元醇磷酸脂。本发明方法的优点是所采用的稳定剂水溶性好、络合能力强、价格低廉;最终形成的稳定化基质固体可直接埋入填埋厂,有利于环境保护。The invention relates to a method for stabilizing waste incineration fly ash, and belongs to the technical field of environmental chemistry. The method of the invention is characterized in that organic polyphosphoric acid and its salt compounds are used as stabilizers. The steps of the stabilization treatment method are as follows: take a certain amount of the above-mentioned stabilizer and dissolve it in an appropriate amount of water to make a solution, then add the aqueous stabilizer solution to a certain amount of incineration fly ash, stir evenly, and make a stable matrix solid; The mixing ratio of stabilizer and waste incineration fly ash is 1:100~5:100; the organic polyphosphoric acid and its salt compounds used are hydroxyethylene diphosphonic acid, aminotrimethylene phosphonic acid, ethylenediaminetetramethyl sodium phosphonate, diethylenetriaminepentamethylenephosphonate or polyol phosphates. The method of the invention has the advantages that the adopted stabilizer has good water solubility, strong complexing ability and low price; the finally formed stabilized matrix solid can be directly buried in a landfill plant, which is beneficial to environmental protection.
Description
技术领域technical field
本发明涉及垃圾焚烧飞灰的稳定化处理方法,属于环境化学技术领域。The invention relates to a method for stabilizing waste incineration fly ash, and belongs to the technical field of environmental chemistry.
背景技术Background technique
危险有害废物的处理是环境保护的重要课题。城市垃圾焚烧是城市生活垃圾处置的一个重要手段,焚烧过程将产生大量的飞灰。垃圾焚烧飞灰中富集了铅、镉、锌等许多重金属、还有少量的二噁英和呋喃等有机污染物。国内外现有的环境法规已将它归类为危险废物,强调必须予以安全处置。利用化学药剂对飞灰进行稳定化处理是目前国内外环境工作者研究的热点。Hazardous waste disposal is an important issue in environmental protection. Municipal waste incineration is an important means of municipal solid waste disposal, and the incineration process will produce a large amount of fly ash. Many heavy metals such as lead, cadmium and zinc are enriched in the fly ash of waste incineration, as well as a small amount of organic pollutants such as dioxin and furan. Existing environmental regulations at home and abroad have classified it as hazardous waste, emphasizing that it must be disposed of safely. The use of chemical agents to stabilize fly ash is currently a research hotspot for environmental workers at home and abroad.
一般来说,用化学药剂稳定固化方法是安全处理危险废物的基本方法。该方法主要是在水溶液中,使大量浸出的重金属离子被螯合剂螯合,形成高分子螯合剂,从而稳定了危险废物。In general, stabilizing the solidification method with chemicals is the basic method for safe disposal of hazardous waste. The method is mainly to make a large amount of leached heavy metal ions be chelated by a chelating agent in an aqueous solution to form a polymer chelating agent, thereby stabilizing the hazardous waste.
目前,国内外稳定飞灰的研究所采用化学药剂主要集中二个方面:(1)采用有机螯合剂,例如乙二胺四乙酸盐、柠檬酸盐、葡萄糖酸或天然有机酸等;(2)无机化学药剂,例如磷酸盐、硫化钠或石灰等。但是这些药剂的应用存在许多不足之处,主要缺点是选用螯合剂的水溶性较差;螯合能力低,形成的重金属离子螯合产物稳定性差;另外就是螯合剂的价格昂贵,不适合于实际工程应用。因此选用合适的化学药剂来稳定处理飞灰已成为当务之急的问题。At present, domestic and foreign research institutes for stabilizing fly ash mainly focus on two aspects of chemical agents: (1) using organic chelating agents, such as ethylenediamine tetraacetate, citrate, gluconic acid or natural organic acids, etc.; (2) ) Inorganic chemicals such as phosphate, sodium sulfide or lime etc. But there are many weak points in the application of these medicaments, and major shortcoming is that the water solubility of selected chelating agent is relatively poor; Chelating ability is low, and the heavy metal ion chelated product stability of formation is poor; Be exactly the price of chelating agent expensive in addition, be not suitable for actual Engineering Applications. Therefore, it has become an urgent task to select suitable chemical agents to stabilize the fly ash.
发明内容Contents of the invention
本发明的目的是提供一种理想的稳定螯合剂来稳定固化垃圾焚烧飞灰。本发明的又一目的是提供一种垃圾焚烧飞灰稳定化处理方法,有效地稳定飞灰中有害重金属。The purpose of the present invention is to provide an ideal stable chelating agent to stabilize and solidify waste incineration fly ash. Another object of the present invention is to provide a method for stabilizing waste incineration fly ash, which can effectively stabilize harmful heavy metals in fly ash.
本发明的一种垃圾焚烧飞灰的稳定化处理方法,其特征是采用有机多聚磷酸及其盐类化合物作为稳定剂,该处理方法具体步骤如下:取一定量的有机多聚磷酸及其盐类化合物溶于适量的水中,配制成溶液,作为稳定剂,然后将该稳定剂水溶液加入到一定量的焚烧飞灰中,均匀搅拌,形成稳定化基质固体;稳定剂有机多聚磷酸及其盐类化合物与垃圾焚烧飞灰的体积-重量配合比例为1∶100~5∶100;采用的有机多聚磷酸及其盐类化合物为羟基亚乙基二膦酸、氨基三甲叉膦酸、二乙烯三胺五甲叉膦胺四甲叉膦酸钠或多元醇磷酸脂。A method for stabilizing waste incineration fly ash of the present invention is characterized in that organic polyphosphoric acid and its salt compounds are used as stabilizers, and the specific steps of the treatment method are as follows: take a certain amount of organic polyphosphoric acid and its salts The compound is dissolved in an appropriate amount of water and prepared into a solution as a stabilizer, and then the aqueous solution of the stabilizer is added to a certain amount of incineration fly ash, and stirred evenly to form a stabilized matrix solid; the stabilizer organic polyphosphoric acid and its salt The volume-weight ratio of compound and waste incineration fly ash is 1:100~5:100; the organic polyphosphoric acid and its salt compounds used are hydroxyethylene diphosphonic acid, aminotrimethylene phosphonic acid, diethylene Sodium Triamine Pentaphosphonium Tetramethylene Phosphonate or Polyol Phosphate.
本发明方法的原理可叙述如下:垃圾焚烧飞灰富集了大量的重金属离子,在水溶液中,重金属离子将会大量浸出,从而污染周围环境。采用的有机多聚磷酸及其盐类化合物,因其分子中含有多个磷酸结构,利用在水溶液中飞灰中重金属离子浸出的特性,将重金属离子进行捕捉,并形成高分子络合物。这样就可稳定固化飞灰中的重金属离子。据测试,稳定固化处理后的飞灰重金属离子浸出浓度远低于美国EPA所设标准。The principle of the method of the present invention can be described as follows: the waste incineration fly ash is enriched with a large amount of heavy metal ions, and in the aqueous solution, the heavy metal ions will be leached in large quantities, thereby polluting the surrounding environment. The organic polyphosphoric acid and its salt compounds used, because their molecules contain multiple phosphoric acid structures, use the characteristics of leaching heavy metal ions in fly ash in aqueous solution to capture heavy metal ions and form polymer complexes. This stabilizes the heavy metal ions in the fly ash. According to the test, the leaching concentration of heavy metal ions in the fly ash after stable curing treatment is far lower than the standard set by the US EPA.
本发明方法用有机多聚磷酸及其盐类化合物来处理垃圾焚烧飞灰,其优点是该稳定剂水溶性好、络合能力强、且价格低廉,具有实际使用效果;经处理后的焚烧飞灰形成稳定化基质固体,可直接埋入填埋厂或作其他用途。The method of the present invention uses organic polyphosphoric acid and its salt compounds to treat waste incineration fly ash, which has the advantages of good water solubility, strong complexing ability, low price, and practical use effect; the treated incineration fly ash The ash forms a stabilized matrix solid that can be buried directly in a landfill or used for other purposes.
具体实施方式Detailed ways
现将本发明的实施例叙述于后。Embodiments of the present invention will now be described below.
实施例一:Embodiment one:
取城市垃圾焚烧飞灰100g,另取2ml羟基亚乙基二膦酸溶于40ml水中;飞灰和羟基亚乙基二膦酸的配比为100∶2。将该稳定剂溶液加入于飞灰中,用搅拌机搅拌10min,形成稳定化基质固体,该固体可直接埋入填埋场或作其他用途。Take 100g of municipal waste incineration fly ash, and dissolve 2ml of hydroxyethylene diphosphonic acid in 40ml of water; the ratio of fly ash to hydroxyethylene diphosphonic acid is 100:2. Add the stabilizer solution into the fly ash and stir it with a mixer for 10 minutes to form a stabilized matrix solid, which can be directly buried in landfill or used for other purposes.
实施例二:Embodiment two:
取城市垃圾焚烧飞灰100g,另取1ml二乙烯三胺五甲叉膦酸溶于40ml水中:飞灰和二乙烯三胺五甲叉膦酸的配比为100∶1。将该稳定剂溶液加入于飞灰中,用搅拌机搅拌10min,形成稳定化基质固体,该固体可直接埋入填埋场或作其他用途。Take 100g of municipal waste incineration fly ash and another 1ml of diethylenetriaminepentamethylenephosphonic acid and dissolve it in 40ml of water: the ratio of fly ash to diethylenetriaminepentamethylenephosphonic acid is 100:1. Add the stabilizer solution into the fly ash and stir it with a mixer for 10 minutes to form a stabilized matrix solid, which can be directly buried in landfill or used for other purposes.
除了上述的稳定剂外,还有氨基三甲叉膦酸、乙二胺四甲叉膦酸钠和多元醇磷酸脂,都是按实施例一同样方法制成稳定化基质固体,并进行填埋处理。各种有机多聚磷酸或其盐类化合物的化学结构式如下所示:Except above-mentioned stabilizing agent, also have amino trimethylene phosphonic acid, sodium ethylenediamine tetramethylene phosphonate and polyhydric alcohol phosphate, all are to make stable matrix solid by the same method of embodiment one, and carry out landfill disposal . The chemical structural formulas of various organic polyphosphoric acid or its salt compounds are as follows:
1.羟基亚乙基二膦酸化学结构式1. Chemical structural formula of hydroxyethylene diphosphonic acid
2.氨基三甲叉膦酸化学结构式:2. The chemical structural formula of aminotrimethylene phosphonic acid:
3.乙二胺四甲叉膦酸钠化学结构式3. Chemical structural formula of sodium ethylenediamine tetramethylene phosphonate
:分子量:612(钠盐): Molecular weight: 612 (sodium salt)
4.二乙烯三胺五甲叉膦酸化学结构式:4. The chemical structural formula of diethylenetriaminepentamethylenephosphonic acid:
分子式和分子量:C9H28O15N3P5 573Molecular formula and molecular weight: C 9 H 28 O 15 N 3 P 5 573
5.多元醇磷酸脂化学结构式5. Polyol Phosphate Chemical Structural Formula
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| CN 200410067071 CN1268448C (en) | 2004-10-12 | 2004-10-12 | Treatment method for stabilizing flying ash in burning garbage |
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| CN 200410067071 CN1268448C (en) | 2004-10-12 | 2004-10-12 | Treatment method for stabilizing flying ash in burning garbage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2494000A1 (en) * | 2009-10-29 | 2012-09-05 | Halliburton Energy Services, Inc. | Scale inhibiting particulates and methods of using scale inhibiting particulates |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100566862C (en) * | 2006-04-11 | 2009-12-09 | 同济大学 | Heavy metal stabilization two-step method for treatment of fly ash from urban domestic refuse burning plant |
| CN101176815B (en) * | 2007-11-15 | 2011-12-21 | 河海大学 | Method for stabilization processing refuse incineration flying ash |
| CN102631761B (en) * | 2012-04-10 | 2014-12-24 | 重庆工商大学 | Application of using N-benzoyl-N-phenylhydroxylamine as stabilizing agent in domestic waste incineration fly ash treatment |
| CN103831281A (en) * | 2012-11-21 | 2014-06-04 | 上海环信环境工程有限公司 | Fly ash stabilizing method |
| CN103241969A (en) * | 2013-05-24 | 2013-08-14 | 南京工程学院 | Method for treating waste incineration fly ash |
| CN109091792A (en) * | 2018-10-10 | 2018-12-28 | 湖南凯涛环保科技有限公司 | A kind of preparation method of flying dust chelating agent and heavy metal chelating agent |
| CN112551975B (en) * | 2020-12-10 | 2022-02-15 | 北京科技大学 | A kind of wall insulation material using dangerous solid waste and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2494000A1 (en) * | 2009-10-29 | 2012-09-05 | Halliburton Energy Services, Inc. | Scale inhibiting particulates and methods of using scale inhibiting particulates |
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