焚烧飞灰水泥窑煅烧资源化水洗预处理实验研究  

Experimental Study on Washing Pretreatment Process for Calcinations of Incinerator Fly Ash in Cement Kiln for Reuse

作　　者：凌永生[1] 金宜英[2] 聂永丰[2] 

机构地区：[1]南京航空航天大学材料学院,江苏南京210016 [2]清华大学环境学院,北京100084

出　　处：《环境保护科学》2012年第4期1-5,共5页Environmental Protection Science

基　　金："十一五"国家科技支撑计划(2006BAC02A18)

摘　　要：以苏州某公司生活垃圾焚烧飞灰为对象,采用水洗和CO2曝气等方法,通过考察飞灰中Cl的去除率、水洗液的pH值和其中重金属的浓度的变化,对飞灰水泥窑煅烧资源化预处理中的工艺参数和处理效果进行了实验研究。结果表明：水灰比是影响氯盐洗脱效果的最主要因素,水洗比应控制在5：1到10：1左右,而CO2通气量是飞灰水洗上清液中重金属去除过程的主要影响因素,通气量在1.4~1.5 L（CO2）/L（HO2）左右可以有效降低上清液pH值及重金属浓度,使出水达到国家污水排放标准。Taking municipal solid waste incinerator （MSWI） fly ash of a company in Suzhou as example, the paper presents an experimental study on the washing pretreatment process for calcinations of MSWI fly ash in cement kiln for reuse by the investigation of dechlorination, pH value and heavy metal removal . The results show that, as the most important factor for dechlorination, the solid-liquid ratio should be controlled in the range of 5：1 to 10：1. And the gas flow rate of CO2 has the most important effect on the heavy metal removal after washing fly ash. It should be controlled in the range of 1.4-1.5 L（CO2）/L（H2O）, while pH value and the concentrations of heavy metals in waste water can be decreased effectively to meet the national wastewater discharge standard.

关 键 词：生活垃圾焚烧飞灰 水泥窑煅烧 水洗预处理 

分 类 号：X701[环境科学与工程—环境工程]