文献类型：期刊文献

中文题名：基于加速碳酸化法稳固化垃圾焚烧飞灰中重金属实验研究

英文题名：Experimental study on stabilization and solidification of heavy metals in municipal solid waste incineration fly ash based on accelerated carbonation technology

作者：王义刚[1] 聂小安[1,2]

第一作者：王义刚

机构：[1]中国林业科学研究院林产化学工业研究所,江苏南京210042;[2]中国林业科学研究院林业新技术研究所,北京100091;

年份：2016

卷号：46

期号：4

起止页码：794-800

中文期刊名：东南大学学报：自然科学版

外文期刊名：Journal of Southeast University（Natural Science Edition）

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：“十二五”国家科技支撑计划资助项目（2012BAA02B01-02）

语种：中文

中文关键词：垃圾焚烧飞灰;燃煤流化床飞灰;加速碳酸化;稳固化;二氧化碳固定

外文关键词：municipal solid waste incineration fly ash; coal-fired fluidized bed boiler fly ash; accelerated carbonation; stabilization and solidification; CO2 sequestration

分类号：X705

摘要：对垃圾焚烧飞灰（MSWI飞灰）与燃煤流化床锅炉飞灰（CFB飞灰）混合而成的混合飞灰中重金属进行加速碳酸化处理.研究不同碳酸化反应温度、碳酸化反应时间和初始液固比对混合飞灰中重金属铅（Pb）和镉（Cd）浸出特性的影响,考察不同加速碳酸化参数对CO_2的固定规律.结果表明：通过调节在混合飞灰碳酸化处理中的飞灰p H值及合成一定量的Friedel相、Ettringite相等自净化矿物可以降低重金属浸出浓度.在飞灰混合比为1∶1、碳酸化温度为20℃、碳酸化时间为0.5 h的条件下,当初始液固比为0.3 m L/g时,重金属Pb的浸出浓度为0.20 mg/L;当初始液固比为0.1 m L/g时,重金属Cd浸出浓度为0.11 mg/L,Pb和Cd的浸出浓度均达到了40 CFR261.24标准.在飞灰混合比为1∶1、反应温度为20℃、碳酸化时间为24 h、初始液固比为0.5 m L/g的条件下,单位质量飞灰可固定CO_2为43.6 mg/g.
Accelerated carbonation technology was developed for treating heavy metals in mixed fly ash consisting of municipal solid waste incineration（ MSWI） fly ash and coal-fired fluidized bed boiler（ CFB） fly ash. The effects of different carbonation temperatures,carbonation time,and initial water-to-solid ratios on the leaching of critical heavy metals（ Pb,Cd） were studied,and the CO_2 sequestration lawunder different carbonation conditions was also investigated. The results showthat the leaching concentrations of Pb and Cd in carbonated mixture are reduced by adjusting the p H of fly ash reasonably（ based on accelerated carbonated treatment on mixed fly ash） and composing self-purification minerals such as Friedel and Ettringite. When the initial water-to-solids ratio is 0. 3m L / g,the leaching concentration of Pb is 0. 20 mg / L with mixing ratio of fly ash as 1∶ 1,carbonation temperature as 20 ℃,and carbonation time as 0. 5 h,while the leaching concentration of Cd is decreased to 0. 11 mg / L when the water-to-solids ratio is 0. 1 m L / g,thus the leading concentration of both meet the standard of 40 CFR 261. 24. The sequstration of CO_2 can be as high as 43. 6 mg / g mixed ash sample under the conditions： mixing ratio of fly ash is 1∶ 1,carbonation temperature is 20℃,carbonation time is 24 h,and initial water-to-solids ratio is 0. 5 m L / g.