城市垃圾焚烧飞灰预处理技术研究  

Research on Pretreatment Technology of Municipal Solid Wastes Incineration Fly Ash

作　　者：马保国[1] 苏华伟[1] 李相国[1] 吕阳[2] 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [2]比利时根特大学Magnel混凝土研究实验室

出　　处：《武汉理工大学学报》2013年第4期22-26,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(51002110);中央高校基本科研业务费专项资金(2012-IV-025)

摘　　要：城市垃圾焚烧飞灰富含钙质与硅质,可以作为生产水泥熟料的一种原料,但是飞灰中含有较高含量的Cl、S等不利于水泥熟料烧成的有害杂质,需要对飞灰采取相应的预处理手段。对比研究了水洗及不同酸洗等预处理手段,发现水洗预处理方式可以有效去除飞灰中Cl元素且不造成钙质流失。此外,研究不同液固比及水洗时间对飞灰预处理效果的影响。结果表明,液固比为10∶1及水洗时间为10min为最佳条件,增加处理时间和液固比对预处理效果的提高不明显。Municipal solid waste incineration （MSWI） fly ash can be utilized as raw materials in the production of clinker,with large amounts of calcium and silica contained in MSWI-fly ash. An experimental pretreatment work about water and acid washing showed that water washing method can effectively dislodge chlorine and avoid the calcium washing away. The effect of different processing time and liquid-solid ratio on the properties of MSWI-fly ash was also studied. Research results showed that the best processing time and solid-liquid ratio were 10 min and 10 ： 1,respectively. Increas- ing processing time and liquid-solid ratio did not bring an obvious improvement in efficiency of pretreatment.

关 键 词：垃圾焚烧飞灰 预处理 钙质 重金属 

分 类 号：TQ09[化学工程]