O2/CO2气氛下煤中汞的释放特性

doi:10.16085/j.issn.1000-6613.2017.01.048

化工进展 ›› 2017, Vol. 36 ›› Issue (01): 372-377.DOI: 10.16085/j.issn.1000-6613.2017.01.048

O₂/CO₂气氛下煤中汞的释放特性

李雅宁, 段钰锋, 王卉, 薛源, 朱纯, 周强, 张君, 佘敏, 刘猛

东南大学能源热转换及其过程测控教育部重点实验室, 江苏南京 210096

收稿日期:2016-05-09 修回日期:2016-07-10 出版日期:2017-01-05 发布日期:2017-01-05
通讯作者: 段钰锋,博士,教授,博士生导师。E-mail:yfduan@seu.edu.cn。
作者简介:李雅宁(1993-),女,硕士研究生。E-mail:1923461486@qq.com。
基金资助:
国家重点研发计划（2016YFC0201105，2016YFB0600604，2016YFB0600203）、国家自然科学基金（51376046，51576044）、江苏省环保科研课题（2016030）、中央高校基本科研业务费专项资金及江苏省普通高校研究生科研创新计划（CXZZ13_0093，KYLX_0115，KYLX_0184，KYLX15_0071）项目。

Release characteristics of mercury in coal under O₂/CO₂ atmosphere

LI Ya'ning, DUAN Yufeng, WANG Hui, XUE Yuan, ZHU Chun, ZHOU Qiang, ZHANG Jun, SHE Min, LIU Meng

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, Jiangsu, China

Received:2016-05-09 Revised:2016-07-10 Online:2017-01-05 Published:2017-01-05

摘要/Abstract

摘要： 在立式管式炉实验装置上研究了O₂/CO₂气氛下煤中汞释放特性，考察了21% O₂/79% N₂和21% O₂/79% CO₂两种气氛下Hg⁰（g）的释放特性、富氧气氛下O₂和CO₂浓度对Hg⁰（g）释放特性的影响。结果表明：汞质量平衡率为83.75%~114.1%，验证了实验结果的准确性。在250~400℃之间，O₂/N₂气氛中Hg⁰（g）的释放浓度高于O₂/CO₂气氛；在400~600℃范围内，O₂/CO₂气氛中Hg⁰（g）的释放浓度略高于O₂/N₂气氛；富氧气氛下O₂浓度越高，Hg⁰（g）的释放浓度越低，O₂对Hg⁰（g）的氧化具有促进作用；富氧气氛下CO₂浓度由0升至30%时，其浓度变化对Hg⁰（g）氧化的影响不大，而由30%升至50%时，Hg⁰（g）的释放浓度增加，高浓度的CO₂可能会抑制Hg⁰（g）的氧化。

关键词: O₂/CO₂气氛, 煤, 燃烧, 汞释放

Abstract: Experimental studies on the mercury release characteristics under O₂/CO₂ atmosphere were carried out in a vertical tube furnace device. The effects of 21%O₂/79%N₂ and 21%O₂/79%CO₂ atmospheres,different O₂ and CO₂ concentrations on the Hg⁰(g) release were investigated. The experimental results show that the mercury mass balance ratio is 83.75%-114.1%,verifying the accuracy of the experimental results. (g) concentration under O₂/N₂ atmosphere is higher than that under O₂/CO₂ atmosphere at 250-400℃. Under O₂/CO₂ atmosphere,Hg⁰(g) release amount is slightly higher than that under O₂/N₂ atmosphere at 400-600℃. With the O₂ concentration increasing,the release amount of the Hg⁰(g) reduces,which indicates that O₂ can enhance Hg⁰(g) oxidation. Hg⁰(g) concentration changes little when CO₂ increases from 0 to 30%. However,Hg⁰(g) release amount increases with the rise of CO₂ from 30% to 50%. This may be because high CO₂ concentration inhibits Hg⁰(g) oxidation.

Key words: O₂/CO₂ atmosphere, coal, combustion, mercury release

中图分类号:

X511

李雅宁, 段钰锋, 王卉, 薛源, 朱纯, 周强, 张君, 佘敏, 刘猛. O₂/CO₂气氛下煤中汞的释放特性[J]. 化工进展, 2017, 36(01): 372-377.

LI Ya'ning, DUAN Yufeng, WANG Hui, XUE Yuan, ZHU Chun, ZHOU Qiang, ZHANG Jun, SHE Min, LIU Meng. Release characteristics of mercury in coal under O₂/CO₂ atmosphere[J]. Chemical Industry and Engineering Progree, 2017, 36(01): 372-377.

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O₂/CO₂气氛下煤中汞的释放特性

Release characteristics of mercury in coal under O₂/CO₂ atmosphere

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