Chemical Industry and Engineering Progree ›› 2017, Vol. 36 ›› Issue (01): 372-377.DOI: 10.16085/j.issn.1000-6613.2017.01.048

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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   

  1. 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

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   

  1. 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
  • 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。

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

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

CLC Number: 

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