CIESC Journal ›› 2016, Vol. 67 ›› Issue (6): 2598-2604.DOI: 10.11949/j.issn.0438-1157.20151675

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Hg2+ removal from FGD system by thiol polystyrene resin

FU Kangli1, YAO Mingyu1, QIN Chuanguang2, CHENG Guangwen1, NIE Jianping1   

  1. 1. National Energy R & D Center of Clean and High-efficiency Fossil-fired Power Generation Technology, Xi'an Thermal Power Research Institute Limited Company, Xi'an 710054, Shaanxi, China;
    2. School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China
  • Received:2015-11-06 Revised:2015-11-23 Online:2016-06-05 Published:2016-06-05
  • Supported by:

    supported by the China Postdoctoral Science Foundation (2015M570849) and the National Key Technology Research and Development Program of China (2014BAA07B04).

巯基聚苯乙烯树脂对FGD系统中Hg2+的脱除性能

付康丽1, 姚明宇1, 钦传光2, 程广文1, 聂剑平1   

  1. 1. 西安热工研究院有限公司国家能源清洁高效火力发电技术研发中心, 陕西 西安 710054;
    2. 西北工业大学理学院, 陕西 西安 710072
  • 通讯作者: 付康丽, 钦传光
  • 基金资助:

    中国博士后科学基金项目(2015M570849);国家科技支撑计划项目(2014BAA07B04)。

Abstract:

Thiol polystyrene resin was prepared by two-step reaction with chloromethyl polystyrene resin as material, and then it was characterized by Fourier transform infrared spectroscopy, Brunauer-Emmett-teller, elemental and thermogravimetric analyses. The Hg2+ removal performance of thiol polystyrene resin was also investigated in simulated flue gas containing Hg2+, desulfurization effluent and desulfurization slurry. It was found that thiol polystyrene resin possessed high thermal stability and could be used as an absorbent for Hg2+ removal from flue gas, desulfurization effluent and desulfurization slurry. The thiol polystyrene resin showed Hg2+ removal efficiencies above 90%, 100% and 100% in flue gas, desulfurization effluent and desulfurization slurry, respectively. The placation of thiol polystyrene resin in the wet flue gas desulfurization system could capture Hg2+ in this system and avoid its entering to desulfurization gypsum, which could bring the mercury reemission. Moreover, thiol polystyrene resin captured Hg2+ was regenerated successfully by 6 mol·L-1 HCl and its regeneration rate with three times regeneration reached up 90.2%.

Key words: flue gas, coal combustion, waste water, mercury, thiol resin

摘要:

以氯甲基化聚苯乙烯微球为原料,经过两步反应制得巯基聚苯乙烯树脂,用红外光谱测试、比表面分析、元素分析及热重分析表征了该巯基聚苯乙烯树脂,测试了此巯基聚苯乙烯树脂对含Hg2+烟气、脱硫废水及脱硫浆液的脱汞性能。分析测试表明:巯基聚苯乙烯树脂热稳定性好,能有效脱除烟气、脱硫废水及脱硫浆液中的Hg2+。巯基聚苯乙烯树脂对烟气中Hg2+的脱除效率大于90%,对脱硫废水及脱硫浆液的脱汞率接近100%。将此树脂置于脱硫系统内,能捕捉脱硫系统内的Hg2+,避免Hg2+进入脱硫石膏而造成脱硫石膏中汞的再释放。用6mol·L-1盐酸洗脱捕捉了Hg2+的巯基聚苯乙烯树脂,再生3次后,巯基聚苯乙烯树脂的再生率仍高达90.2%。

关键词: 烟道气, 煤燃烧, 废水, 汞, 巯基树脂

CLC Number: