...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy & fuels >Mass Flow Analysis of Mercury Transformation and Effect of Seawater Flue Gas Desulfurization on Mercury Removal in a Full-Scale Coal-Fired Power Plant
【24h】

Mass Flow Analysis of Mercury Transformation and Effect of Seawater Flue Gas Desulfurization on Mercury Removal in a Full-Scale Coal-Fired Power Plant

机译：大型火力发电厂汞转化的质量流量分析和海水烟气脱硫对脱汞的影响

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To understand the mercury speciation and mass flow in a full-scale bituminous coal-fired power plant equipped with a selective catalytic reduction (SCR) unit, an electrostatic precipitator (ESP), and a seawater flue gas desulfurization (SWFGD) scrubber, the evolution and emission of mercury was systematically measured and analyzed. The results showed that the elemental mercury (Hg-0) was oxidized mainly through heterogeneous oxidation, especially in SCR, which transformed 57-64% of elemental mercury (Hg-0) to oxidized mercury (Hg2+). It changed the concentrations of different mercury species and then increased the Hg2+ removal efficiencies of SWFGD, which ranged from 67 to 82%. A total of 8.24-11.54% of mercury was adsorbed by fly ash to form particulate-bound mercury (Hg-P) and subsequently removed by the ESP. Mass flow and mass distribution of mercury indicated that most mercury was removed and retained in the SWFGD. The heterogeneous oxidation of Hg-0 in SCR and then absorption of Hg2+ by SWFGD significantly enhanced the mercury removal in the studied coal-fired power plant, although a part of Hg2+ absorbed in SWFGD was reduced and released back to the flue gas. Hg2+ was a little more than Hg-0 in the flue gas emitted to the atmosphere. In addition, the SWFGD system without limestone addition may be beneficial for decreasing the re-emission of Hg-0. The mercury emission factor at the power plant is 4.098 g/TJ, which is lower than that at other power plants without SCR. The configuration of SCR + ESP + SWFGD enhances the co-benefit mercury control.
机译：要了解配备了选择性催化还原（SCR）单元，静电除尘器（ESP）和海水烟气脱硫（SWFGD）洗涤塔的大型烟煤电厂的汞形态和质量流量，对汞的排放进行了系统的测量和分析。结果表明，元素汞（Hg-0）主要通过非均相氧化被氧化，特别是在SCR中，该元素将57-64％的元素汞（Hg-0）转化为氧化汞（Hg2 +）。它改变了不同汞物种的浓度，然后提高了SWFGD的Hg2 +去除效率，范围从67％到82％。粉煤灰吸附了总共8.24-11.54％的汞，形成了结合颗粒的汞（Hg-P），随后被ESP去除。汞的质量流量和质量分布表明，大多数汞已被除去并保留在SWFGD中。在研究的燃煤电厂中，SCR中Hg-0的异质氧化然后被SWFGD吸收Hg2 +显着提高了除汞能力，尽管SWFGD中吸收的一部分Hg2 +被还原并释放回烟道气中。在排放到大气中的烟道气中，Hg2 +略高于Hg-0。此外，不添加石灰石的SWFGD系统可能有利于减少Hg-0的再排放。电厂的汞排放因子为4.098 g / TJ，低于其他没有SCR的电厂的汞排放因子。 SCR + ESP + SWFGD的配置可增强对汞的协同效益控制。

著录项

  • 来源
    《Energy & fuels》 |2017年第10期|11109-11116|共8页
  • 作者

    Su Sheng; Liu Lijun; Wang Lele; Syed-Hassan Syed. Shatir A.; Kong Fanhai; Hu Song; Wang Yi; Jiang Long; Xu Kai; Zhang Anchao; Xiang Jun;

  • 作者单位

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China|Xian Thermal Power Res Inst Co, Suzhou Branch, Suzhou 215153, Jiangsu, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China|Univ Teknol MARA, Fac Chem Engn, Shah Alam 40450, Selangor, Malaysia;

    Xian Thermal Power Res Inst Co, Suzhou Branch, Suzhou 215153, Jiangsu, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China;

    Henan Polytech Univ, Sch Mech & Power Engn, Jiaozuo 454003, Henan, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号