| 焚烧飞灰水泥窑共处置过程As的迁移特征 |
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| 引用本文： | 王雷,金宜英,聂永丰,李润东.焚烧飞灰水泥窑共处置过程As的迁移特征[J].环境科学学报,2011,31(2):407-413. |
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| 作者姓名： | 王雷 金宜英 聂永丰 李润东 |
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| 作者单位： | 1. 沈阳航空航天大学,辽宁省清洁能源重点实验室,沈阳,110036
2. 清华大学,环境科学与工程系,北京,100084 |
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| 摘 要： | 为了明确焚烧飞灰水泥窑共处置过程中As的迁移特性,对大量国外工业水泥窑As的监测数据进行了统计分析,研究As或Cl输入总量对As迁移特性的影响.同时,采用CHEMKIN软件对水泥窑煅烧过程中As的物相进行热力学模拟,并使用水泥回转窑系统的简化模型讨论了窑灰循环对As迁移的影响.结果表明,焚烧飞灰中As的酸可提取态、可还...
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| 关 键 词： | 焚烧飞灰 水泥窑共处置 砷 迁移 热力学模拟 CHEMKIN 窑灰循环 |
| 收稿时间： | 6/1/2010 2:09:53 PM |
| 修稿时间： | 2010/7/13 0:00:00 |
Characteristics of arsenic migration in MSWI fly ash during co-processing with a cement kiln |
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| WANG Lei,JIN Yiying,NIE Yongfeng and LI Rundong.Characteristics of arsenic migration in MSWI fly ash during co-processing with a cement kiln[J].Acta Scientiae Circumstantiae,2011,31(2):407-413. |
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| Authors: | WANG Lei JIN Yiying NIE Yongfeng and LI Rundong |
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| Institution: | Shenyang Aerospace University, Liaoning Key Laboratory of Clean Energy, Shenyang 110036,Tsinghua University, Department of Environmental Science and Engineering, Beijing 100084,Tsinghua University, Department of Environmental Science and Engineering, Beijing 100084 and Shenyang Aerospace University, Liaoning Key Laboratory of Clean Energy, Shenyang 110036 |
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| Abstract: | The migration characteristics of arsenic during the co-processing of municipal solid waste incinerator (MSWI) fly ash in a cement kiln were investigated. Emission data of arsenic from the cement kilns which co-processed waste materials were analyzed statistically to investigate the effect of total arsenic input and total chloride input. An equilibrium analysis of arsenic was performed using the thermodynamic equilibrium software CHEMKIN. Asimplified model of cement kiln was used to investigate the effect of kiln dust circulation on the migration characteristics of arsenic. The results show the exchangeable,water and acid-soluble phase,the easily reduced phase and the oxidizable phase of arsenic in MSWIfly ash were 28.55%,20.72% and 65.33% respectively according to the BCRsequential extraction procedure. CaOhas a dramatic effect on the thermodynamic behavior of arsenic,while chloride has little effect. Because the main component of the cement raw meal is CaCO3,which generates a large amount of CaOafter decomposition,it reacts with arsenic to form stable Ca3(AsO4)2. The "single stabilization rate" of arsenic was approximately 65% during the sintering process. The model calculation show the As concentration increased in both kiln dust and clinker after the substitution of cement raw meal with MSWIfly ash at 1%. Kiln dust circulation increased the stabilization of As in clinker. |
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| Keywords: | MSWI fly ash co-processing As thermal analysis CHEMKON kiln dust circulation model |
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