摘要
在热态燃煤试验炉上，利用OHM法、氢化物发生-电感耦合等离子体原子发射光谱（HG-ICP-AES）法，研究了原煤燃烧气态单质Hg（Hg0）、气态二价Hg（Hg2＋）及颗粒态Hg（Hgp）分布特性，废水中Cl与Na浓度、烟气中SO2与NO对Hg0的氧化影响。结果表明，试验燃煤F、Cl浓度低，1#和2#燃煤烟气中Hg0占输入总Hg（HgT）比例分别为68.3%和80.6%，而Hg2＋比例仅占22.2%和13.1%；在烟气中喷射丙烯酸钠和萘磺酸钠废水的液气比为0.028 L/m3时，1#和2#燃煤烟气Hg2＋所占比例分别达到80%和75%以上，而HgP的比例变化不显著；当喷射废水液气比为0.028 L/m3时，1#和2#燃煤的SO2浓度下降11.4%~15.7%和12.2%~17.7%，促进了Cl对Hg0的氧化；而NO对Hg0的氧化不显著。
The Hg0, Hg2＋ and Hgp distribution of coal-fired flue gas was investigated by the OHM and hydride generation-inductively coupled plasma atomic emission spectrometry （HG-ICP-AES） method. The impacts of chlorine and sodium content of wastewater and SO2 and NO concentration of flue gas on Hg0 oxidation were tested on the coal-fired test furnace in hot state. The results showed that the ferrous and chlorine content in the test coal was low and the ratio of Hg0 to HgT was 68.3% and 80.6% for coal-fired flue gas 1# and 2# respectively, while Hg2＋ ratio was only 22.2% and 13.1% respectively. When the sodium acrylate and naphthalene sulfonate wastewater liquid to flue gas ratio was 0.028 L/m3, the Hg2＋ ratio reached higher than 80% and 75% in coal-fired flue gas 1# and 2# respectively. While, there were no significance variations for Hgp ratio in flue gas. When the wastewater liquid to flue gas ratio was 0.028 L/m3, the SO2 concentration decreased by 11.4%-15.7% and 12.2%-17.7% for coal-fired flue gas 1# and 2# respectively, which accelerated Hg0 oxidation. There was no significant effect of NO in flue gas on Hg0 oxidation.
出处
《环境工程技术学报》
CAS
2014年第3期205-211,共7页
Journal of Environmental Engineering Technology
基金
中国环境科学研究院改革专项启动项目(2011GQ-21)
国家环境保护公益性行业科研专项(200909025
201009048)
国家高技术研究发展计划(863计划)项目(2013AA065001)
关键词
丙烯酸钠
萘磺酸钠
氯
钠
Hg^0
氧化
燃煤烟气
sodium acrylate
naphthalene sulfonate
chlorine
sodium
Hg0
oxidation
coal-fired flue gas
作者简介
石应杰（1972-），男，高级工程师，硕士，主要从事大气污染控制技术研究，shiaei@sina．com
责任作者：张凡（1959-），男，研究员，主要从事大气污染控制技术研究，zhangfan5188@vip．sina．com
