COMPOSITION AND MELTING CHARACTERISTICS OF FLY ASH FROM 14 MSWI PLANTS IN CHINA
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摘要: 对我国东北、华北、华东和华南地区14座城市生活垃圾焚烧厂的飞灰进行了组分、热灼减率和熔融特性分析。结果表明:我国炉排炉飞灰中CaO含量最高,其质量分数达到40%~60%;Cl含量次之,质量分数为20%~30%;同时富集大量易气化的重金属。飞灰的热灼减率随温度升高而显著增加,当温度达到1200℃以上时趋于稳定,最高可达40%以上。飞灰的流动温度受SiO2的含量影响最显著,流动温度分布在1100~1500℃内。Abstract: In this paper, the physicochemical properties of fly ash from 14 municipal solid waste incinerators located in Northeast, North, East and South China were analysed, including their composition, loss on ignition and melting characteristics. The results showed that the content of CaO in fly ash of grate furnace was the highest in China, and the mass fraction of CaO was 40%~60%. The content of Cl was in the range of 20%~30%. At the same time, considerable contents of heavy metals which are easy to gasify were enriched in the fly ash. The loss on ignition of fly ash increased significantly with the increase of incineration temperature. When the temperature was 1200℃ above, it tended to be stable, and the highest loss on ignition was 40% above. The flow temperature of fly ash was most significantly affected by the content of SiO2, distributed in the range of 1100~1500℃.
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Key words:
- MSW /
- fly ash /
- components /
- heavy metals /
- loss on ignition /
- melting
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[1] 李清毅,宋凯,何亮等. 生活垃圾填埋场中飞灰固化体动态半动态浸出行为[J]. 环境工程,2019,37(11):149-154. [2] 饶荣,罗超,刘青. 生活垃圾焚烧飞灰无害化及资源化研究进展[J]. 有色金属冶金设计与研究,2018,39(5):29-34. [3] 栾敬德,姚鹏飞,李润东. MSW焚烧飞灰熔融技术研究进展[J]. 环境工程,2014,32(4):92-94. [4] 卢欢亮,王中慧,汪永红,等. 等离子体熔融技术处理垃圾焚烧飞灰的中试研究[J]. 环境卫生工程,2017,25(4):51-57. [5] OKADA T, TOMIKAWA H. Efficiencies of metal separation and recovery in ash-melting of municipal solid waste under non-oxidative atmospheres with different reducing abilities[J]. Journal of Environmental Management, 2016, 166:147-155. [6] 常威,蒋旭光,邱琪丽,等. 全烧垃圾流化床炉飞灰制备免烧砖的性能研究[J]. 环境科学学报,2015,35(7):2224-2232. [7] 李润东,聂永丰,王雷,等. 成分对垃圾飞灰熔融过程重金属迁移的影响[J]. 清华大学学报,2004,36(8):1180-1183. [8] 白晶晶,张增强,闫大海,等. 水洗对焚烧飞灰中氯及重金属元素的脱除研究[J]. 环境工程,2012,30(2):104-108. [9] 王小波,阎常峰,赵增立,等. 垃圾焚烧飞灰熔融污染物排放研究[J]. 燃料化学学报,2008,36(6):748-752. [10] CLARKE L B,SLOSS. Trace Elements Emissions From Coal Combustion and Gasification[R]. London:IEA Coal Research Report,1992:356-367. [11] 付建英,李晓东,詹明秀,等. 生活垃圾循环流化床焚烧锅炉飞灰中二噁英热解析特性研究[J]. 环境科学学报,2015,35(6):1833-1841. [12] 林祖苍,刘云根,庞云平. 城市垃圾焚烧飞灰熔融过程中物质蒸发的研究[J]. 环境科学导刊,2008,27(增刊):107-110. [13] 张楚,王爽. 城市垃圾焚烧飞灰高温熔融处理实验研究[J]. 辽宁石油化工大学学报,2019,39(16):31-35. [14] 陈冬梅. 等离子体熔融垃圾焚烧飞灰制备玻璃体的实验研究[D]. 天津:天津大学,2018. [15] 魏国侠,王承智,刘汉桥,等.垃圾焚烧飞灰熔融制备微晶玻璃的研究进展[J]. 中国陶瓷,2014,50(11):7-10. [16] 郭志,刘志敏. 垃圾焚烧飞灰悬浮预热等离子体熔融系统热力学计算及能耗费用研究[J]. 热力发电,2020,40(4):12-17. [17] 章骅,于思源,邵立明,等. 烟气净化工艺和焚烧炉类型对生活垃圾焚烧飞灰性质的影响[J]. 环境科学,2018,39(1):467-475. [18] 陶应翔. 添加剂对垃圾焚烧飞灰高温熔融的影响研究[D].哈尔滨:哈尔滨工业大学,2019.
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