Elemental mercury removal from flue gas using modified tonstein: Performance of adsorbent injection at an entrained flow reactor system and 50-MW coal-fired power plant in China

Liu Huan; Chen Yu; Gao Tian; Yang Gangzhong; Wang Yi; Zhou Yuming; Yang Jianping; Zhao Yongchun; Guo Xin; Zhang Junying

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Elemental mercury removal from flue gas using modified tonstein: Performance of adsorbent injection at an entrained flow reactor system and 50-MW coal-fired power plant in China

机译：元素汞从烟道气中使用改良的Tonstein去除：在临床流动反应器系统和中国50 MW燃煤电厂的吸附注射液的性能

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The application of mercury removal technology in coal-fired power plants has attracted much attention. In this paper, performances of CuBr2-modified tonstein from coal seams (MTCS) injection at an entrained flow reactor system and a 50-MW coal-fired power plant and their corresponding mechanisms were studied. The results showed that the increase of the injection rate, the reduction of the particle size, the extension of the residence time, and the increase of the initial Hg-0 concentration were all conducive to mercury removal. At an entrained flow reactor, SO2 and H2O obviously inhibited mercury removal, but this inhibition could be reduced with the increase of the residence time or the participation of NO and HCl. Specifically, with the participation of 1200 ppm SO2, the Hg-0 removal efficiency was 56.9% and 82.8% at 0.6 s and 1.2 s, respectively. In the temperature range of 30-150 degrees C, the Hg-0 removal efficiency in the flue gas at the simulated flue exit was approximately 83-93%. In addition, at a 50-MW coal-fired power plant, the injection of MTCS was beneficial to Hg-0 removal. In this process, most Hg-0 was converted to Hg2+ by active substances, and then captured using fabric filter (FF) and wet flue gas desulfurization (WFGD) device. Injecting MTCS with a particle size of 300 mesh and concentration of 0.31 g/m(3) can result in a relative mercury removal efficiency of up to 82.9% in the flue gas at the WFGD outlet, indicating that the low-cost mineral adsorbent MTCS is a suitable choice for mercury control in coal-fired power plants. (C) 2020 Elsevier Ltd. All rights reserved.

机译：汞去除技术在燃煤发电厂的应用引起了很多关注。在本文中，研究了Cub级改性Tonstein在夹带的流量反应器系统和50mW燃煤发电厂中喷射的煤层（MTC）的性能及其相应的机制。结果表明，注射速率的增加，粒度的减少，停留时间的延伸，初始HG-0浓度的增加均有利于汞去除。在夹带的流动反应器中，SO2和H2O明显抑制汞去除，但随着停留时间的增加或NO和HCl的参与，可以降低这种抑制。具体地，随着1200ppm SO2的参与，Hg-0去除效率分别为0.6秒和1.2秒的56.9％和82.8％。在30-150℃的温度范围内，模拟烟道退出处的烟道气中的Hg-0去除效率约为83-93％。此外，在50兆瓦的燃煤发电厂，注射MTCs有益于HG-0去除。在该方法中，大多数HG-0通过活性物质转化为HG2 +，然后使用织物过滤器（FF）和湿烟气脱硫（WFGD）装置捕获。注入粒径为300目的MTC，浓度为0.31g / m（3），可导致WFGD出口的烟气中的相对汞去除效率高达82.9％，表明低成本的矿物吸附性MTCs is a suitable choice for mercury control in coal-fired power plants. （c）2020 elestvier有限公司保留所有权利。

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来源
《Journal of Cleaner Production》 |2021年第10期|124998.1-124998.10|共10页
作者
Liu Huan; Chen Yu; Gao Tian; Yang Gangzhong; Wang Yi; Zhou Yuming; Yang Jianping; Zhao Yongchun; Guo Xin; Zhang Junying;
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Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

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

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

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

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

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

Cent South Univ Sch Energy Sci & Engn Changsha 410083 Peoples R China;

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

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

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

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正文语种 eng
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Mercury; Removal; Tonstein; Injection; Coal combustion;

机译：汞;去除;TONSTEIN;注射;煤燃烧;

Elemental mercury removal from flue gas using modified tonstein: Performance of adsorbent injection at an entrained flow reactor system and 50-MW coal-fired power plant in China

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