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垃圾焚烧飞灰熔融固化处理过程特性分析
引用本文:姜永海,席北斗,李秀金,王琪,张晓萱.垃圾焚烧飞灰熔融固化处理过程特性分析[J].环境科学,2005,26(3):176-179.
作者姓名:姜永海  席北斗  李秀金  王琪  张晓萱
作者单位:1. 北京化工大学环境工程系,北京,100029;中国环境科学研究院,北京,100012
2. 中国环境科学研究院,北京,100012
3. 北京化工大学环境工程系,北京,100029
基金项目:国家高技术研究发展计划(863)项目(2002AA644010);国家科技攻关计划资助项目(2003BA614A)
摘    要:为研究熔融固化过程中飞灰主要成分的迁移转化规律,在有温控的高温实验熔融炉中对垃圾焚烧飞灰进行了动态熔融固化实验研究,对处理后的飞灰进行了XRF、XRD分析检测,分析了飞灰熔融过程中熔融渣的主要成分、物相组成、碱度、挥发率和减容率的变化规律.试验结果表明:①飞灰中主要成分CaO、Al2O3和SiO2的质量分数随着温度的升高而增加,而主要成分Cl元素和SO3则从原来的20.59%和10.74%分别降低到0.15%和0.22%,可见高含量Cl元素和S元素是引起飞灰熔融固化挥发率高的主要原因,并且可能主要以氯化物和硬石膏的形式分解挥发,XRD的测定结果也进一步证明了这一点.②飞灰熔融前,碱度随温度的升高而显著降低,但当温度达到流动温度后,碱度值随温度的变化很小,基本保持在0.95左右.③飞灰中盐类分解挥发主要发生在1150℃~1260℃之间,在飞灰熔融温度前约100℃的范围内.

关 键 词:垃圾焚烧飞灰  熔融/玻璃化  碱度  过程分析
文章编号:0250-3301(2005)03-0176-04
收稿时间:2004/5/29 0:00:00
修稿时间:2004/8/12 0:00:00

Characteristics of Melting and Solidification Process of Fly Ash from Refuse Incinerator
JIANG Yong-hai,XI Bei-dou,LI Xiu-jin,WANG Qi and ZHANG Xiao-xuan.Characteristics of Melting and Solidification Process of Fly Ash from Refuse Incinerator[J].Chinese Journal of Environmental Science,2005,26(3):176-179.
Authors:JIANG Yong-hai  XI Bei-dou  LI Xiu-jin  WANG Qi and ZHANG Xiao-xuan
Institution:College of Environmental Engineering, Beijing University of Chemical Technology, Beijing, China.
Abstract:This study was conducted to investigate the migration patterns of main compositions of the fly ash from refuse incinerator during melting and solidification process. The experiment was performed in a high temperature melting furnace with temperature controlled. X-ray fluorescence spectroscopy (XRF) and X-ray diffractometer (XRD) were used to analyzed the fly ash treated. The parameters investigated included main compositional contents, phase constituents, alkalinity, vaporation rate, volume reduction rate. The results show: (1) During the melting and solidification process, the contents of CaO, Al2O3, and SiO2 in fly ash increased as the temperature went up, but element Cl and S decreased from initial 20.59%, 10.74% to final 0.15%, 0.22%, respectively. This suggests that higher amount of Cl and S in original fly ash could lead to more vaporation in the form of chloride and calcium salfate in the process, which was further verified by XRD analyzing result. (2) The alkalinity decreased as melting temperature increased, but tended to be stable and maintained around 0.95 after temperature reached flowing temperature. (3) The decomposition and vaporation of the salts in the fly ash mainly occurred in the temperatures between 1150 degrees C and 1260 degrees C, which was approximately 100 degrees C lower than melting temperature.
Keywords:fly ash from MSWI  melting and solidification  alkalinity  process analysis
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