摘要本文研究了Fe-Mn尖晶石作为新型吸附剂应用于燃煤电厂模拟烟气中零价汞的处理和深度脱硫。Fe-Mn尖晶石在低温低硫的环境下表现出优异的脱汞性能，并能深度脱硫，其吸附烟气中零价汞的性能与烟气组分、温度及烟气中SO2的浓度有关。烟气中H2O和SO2的存在会抑制吸附剂的活性，SO2浓度越高，Fe-Mn尖晶石的脱汞性能越差。Fe-Mn尖晶石具有超顺磁性，可通过磁分离方法把Fe-Mn尖晶石与飞灰和液体分离。本文中利用盐酸/次氯酸钠混合液进行吸附剂再生，再生后的Fe-Mn尖晶石保持良好的吸附性能。将Fe-Mn尖晶石置于燃煤电厂现有脱硫装置的下游，并与湿式电除尘器联用，可有效去除零价汞及协同脱硫，具有很高的实际应用潜能。25826
关键词　Fe-Mn尖晶石　零价汞　深度脱硫　吸附剂再生
毕业论文设计说明书外文摘要
Title   A Study of Fe-Mn Spinel for Controlling Hg0 and SO2 Simultaneously
Abstract
Fe-Mn spinel was used as a novel sorbent for Hg0 removal and deep desulfurization in simulative coal-fired power plants flue gas in this study. Fe-Mn spinel showed an excellent performance for Hg0 removal and deep desulfurization under low-temperature and low-sulfur circumstance. The composition of flue gas, adsorbent temperature and concentration of SO2 can significantly influence the performance of Fe-Mn spinel for adsorbing elemental mercury. The adsorption activities were suppressed in the presence of H2O and SO2. Higher SO2 concentration induces lower mercury removal efficiency. Fe-Mn spinel can be readily magnetically separated from fly ash and liquid due to its excellent super paramagnetism. The used sorbent can be regenerated by hydrochloric acid washing, and it remains high mercury removal and sulfur removal efficiency after regeneration. Due to its high efficiency of removing elemental mercury and sulfur dioxide, it is very promising for the practical application of Fe-Mn spinel in combination with wet electrostatic precipitator in the downstream of the existing desulfurization device in coal-fired power plants.
Keywords　Fe-Mn spinel　 Hg0 removal　deep desulfurization　sorbent regeneration
目　次
1　引言    1
1.1　汞的危害与来源    1
1.2　汞污染的治理技术    1
1.3　SO2对烟气脱汞的影响    3
1.4　烟气脱硫技术与湿式静电除尘器的应用    3
1.5　研究目的和意义    4
2　实验部分    6
2.1　实验药品及仪器    6
2.2　Fe-Mn尖晶石样品制备    7
2.3　Fe-Mn尖晶石表征    7
2.4　模拟烟气协同脱汞除硫实验    7
3　实验结果    10
3.1　Fe-Mn尖晶石表征    10
3.2　Fe-Mn尖晶石在不同条件下的脱汞除硫性能研究    12
3.3　Fe2.5Mn0.5O4表面汞平衡探究    19
3.4　Fe2.5Mn0.5O4协同脱汞除硫循环应用研究    21
结　论    26
致　谢    27
参考文献28
1　引言
1.1　汞的危害与来源
汞在环境中具有易挥发性、持久性、生物蓄积性和高度的毒性，是空气中有毒金属的重要组分[1,2]，可在湿地、湖泊、河流和海水中的微生物的作用下形成甲基汞，并随着食物链在生物体内聚积。接触不同剂量的汞，可严重影响人类的神经系统和发育，甚至造成人的死亡[3]。为控制汞对人体健康和环境造成的危害，美国环保署于2005年3月l5日颁布了汞排放控制标准(Clean Air Mercury Rule, CAMR)，规定了燃煤电厂烟气的汞排放限值，旨在2018年实现燃煤电厂汞排放量较1999年降低70%。我国新实施的《火电厂大气污染物排放标准》（GB 13223-2011）规定，火电厂的汞排放限值为0.03 mg/m3。 Fe-Mn尖晶石协同控制零价汞和SO2的研究:http://www.751com.cn/huaxue/lunwen_19786.html