[1]籍晓洋,吴新,孙立,等.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[J].东南大学学报(自然科学版),2016,46(4):794-800.[doi:10.3969/j.issn.1001-0505.2016.04.020]
　Ji Xiaoyang,Wu Xin,Sun Li,et al.Experimental study on stabilization and solidification of heavy metals in municipal solid waste incineration fly ash based on accelerated carbonation technology[J].Journal of Southeast University (Natural Science Edition),2016,46(4):794-800.[doi:10.3969/j.issn.1001-0505.2016.04.020]
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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()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
46
期数:
2016年第4期
页码:
794-800
栏目:
环境科学与工程
出版日期:
2016-07-20

文章信息/Info

Title:
Experimental study on stabilization and solidification of heavy metals in municipal solid waste incineration fly ash based on accelerated carbonation technology
作者:
籍晓洋; 吴新; 孙立; 王帅; 刘宣义
东南大学能源热转换及其过程测控教育部重点实验室, 南京 210096
Author(s):
Ji Xiaoyang;  Wu Xin;  Sun Li;  Wang Shuai;  Liu Xuanyi
Key Laboratory of Energy Conversion and Process Control of Ministry of Education, Southeast University, Nanjing 210096, China
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
Keywords:
municipal solid waste incineration fly ash;  coal-fired fluidized bed boiler fly ash;  accelerated carbonation;  stabilization and solidification;  CO2 sequestration
分类号:
X705
DOI:
10.3969/j.issn.1001-0505.2016.04.020
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CO2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pH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 mL/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 mL/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 CFR 261.24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 mL/g的条件下,单位质量飞灰可固定CO2为43.6 mg/g.
Abstract:
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 CO2 sequestration law under different carbonation conditions was also investigated. The results show that the leaching concentrations of Pb and Cd in carbonated mixture are reduced by adjusting the pH 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 0.3 mL/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 mL/g, thus the leading concentration of both meet the standard of 40 CFR 261.24. The sequstration of CO2 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 mL/g.

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备注/Memo

备注/Memo:
收稿日期: 2015-11-08.
作者简介: 籍晓洋(1990—),男,硕士生;吴新(联系人),男,副教授,wuxin@seu.edu.cn.
基金项目: “十二五”国家科技支撑计划资助项目(2012BAA02B01-02).
引用本文: 籍晓洋,吴新,孙立,等.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[J].东南大学学报(自然科学版),2016,46(4):794-800. DOI:10.3969/j.issn.1001-0505.2016.04.020.
更新日期/Last Update: 2016-07-20