王建朋,段璐,王乃继,李杰
WANG Jianpeng,DUAN Lu,WANG Naiji,LI Jie

• 1:煤科院节能技术有限公司
• 2:煤炭科学技术研究院有限公司
• 3:国家能源煤炭高效利用与节能减排技术装备重点实验室
• 4:山东济南热力集团有限公司

摘要(Abstract)：

随着环境问题的日益严峻及燃煤锅炉超低排放工作的实施,由燃煤引起的大气污染问题及脱硫和除尘设备协同脱除污染物的作用逐渐受到关注。由燃煤释放的SO_2和颗粒物对人类健康及自然环境造成严重危害,因此对SO_2和颗粒物的治理至关重要。笔者综述了湿法烟气脱硫技术如石灰石-石膏法、氨法等,半干法烟气脱硫技术如循环流化床烟气脱硫技术(CFB)、高倍率灰钙循环烟气脱硫(NGD)等以及干法烟气脱硫技术如电子射线辐射法脱硫技术、活性炭(活性焦、活性半焦)吸附脱硫技术等的发展历史、技术特点及适用范围,并对比分析了各脱硫技术对颗粒物排放特性的影响。结果表明,湿法烟气脱硫技术SO_2脱除效率最高,尤其是石灰石-石膏法烟气脱硫技术,总效率可达99%以上。入口颗粒物浓度高于5 mg/m3时,此技术能够协同脱除烟气中的颗粒物,除尘效率可达50%～80%,脱硫前后粒径分布都为典型的双峰分布,且脱硫后粒径峰值向小粒径偏移,硫酸盐成分增加;入口颗粒物质量浓度低于5 mg/m3时,出口颗粒物浓度可能出现不降反增的现象,另外,由于其投资和运行成本高,多应用于大型燃煤机组和脱硫剂来源丰富的地区,同时湿法烟气脱硫产物还具有一定的经济效益;半干法和干法烟气脱硫技术SO_2脱除效率在60%～90%,与湿法脱硫技术相比具有投资和运行成本低,占地面积小和节约水资源等优点,在中小型锅炉领域如燃煤工业锅炉具有较好的应用前景,但大量脱硫产物和脱硫剂随烟气进入除尘设备,浓度高达1 000 g/m3以上,为除尘设备造成极大的运行压力,加大了投资和运行成本。目前半干法烟气脱硫技术及干法烟气脱硫技术对颗粒物排放特性的影响研究较少,还需在脱硫系统对颗粒物粒径、成分及形貌特性等方面的影响规律做进一步研究。
During the increasingly serious environmental problems and the ultra-low emission implementation of coal-fired boiler,the air pollution problems caused by coal combustion and the combined effect of the flue gas desulfurization( FGD) and dust removal equipment to remove pollutants gradually has been drown great attention. The SO_2 and particulate matter released from coal combustion cause serious harm to human health and the natural environment,and it is of vital importance to control the SO_2 and particulate matter.In this paper,the development history,technical characteristics and scope of application of the wet FGD technology such as Limestone-gypsum method,ammonia method and so on,semi-dry FGD technology such as circulating fluidized bed flue gas desulfurization technology,No Gap Desulphurization technology and so on,and dry FGD technology such as Electron ray radiation desulfurization technology,activated carbon( active coke,active semi coke) adsorption desulfurization technology and so on were reviewed.The effect of the FGD system on the emission characteristics of particle was analyzed.the results show that the wet flue gas desulfurization technology has the highest SO_2 removal efficiency,especially the limestone-gypsum flue gas desulfurization technology,and the total efficiency is more than 99%.When the inlet particulate matter concentration is higher than 5 mg/m3,the technology can synergistically remove particulate matter in the flue gas,and the dust removal efficiency can reach 50%-80%.The particle size distribution before and after desulfurization is a typical bimodal distribution,and the peak value of particle size shifts to a small particle size after desulfurization,and the sulfate content increases.When the mass concentration of particulate matter at the inlet is less than 5 mg/m3,the particle concentration at the outlet may increase instead of decreasing.However,due to the disadvantages of high investment and operating cost,it is mostly used in large coal-fired units and areas with rich sources of desulfurizer,and the products of wet flue gas desulfurization also have certain economic benefits.The desulfurization efficiency of the semi-dry and dry FGD is about 60%-90%.Compared with FGD,the semi-dry and dry FGD may have a good prospect in the field of small and medium boilers such as coal-fired industrial boilers due to its low investment and operating costs,small size and water conservation.Thus,a large amount of desulfurization products and desulfurizers enter into the dedusting equipment along with the flue gas,the particle concentration at the inlet of dust removal equipment is higher than 1 000 g/m3,which causes great operating pressure for the dedusting equipment and increases the investment and operating cost.At present,there are few studies on the effects of semi-dry flue gas desulfurization technology and dry flue gas desulfurization technology on the emission characteristics of particulate matter. It is necessary to further study the influence of the desulfurization system on the particle size,composition,and morphology of particulate matter.

关键词(KeyWords)： 烟气脱硫;颗粒物;超低排放;协同脱除;燃煤锅炉
flue gas desulfurization;particulate matter;ultra low emission;synergistic removal;coal-fired boiler

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金青年基金资助项目(51906095);; 中国煤炭科工集团有限公司国际合作项目(2019-TD-2-CXY003)

作者(Author): 王建朋,段璐,王乃继,李杰
WANG Jianpeng,DUAN Lu,WANG Naiji,LI Jie

DOI: 10.13226/j.issn.1006-6772.20022804

参考文献(References)：

• [1]中华人民共和国国家统计局．中国统计年鉴2019[M]．北京:中国统计出版社，2019.National Bureau of Statistics of People's Republic of China. China statistical yearbook 2019[M].Beijing:China Statistics Press,2019.
• [2]李瑞萍，王高尚，王安建，等．典型工业化国家SO2排放影响因素分析及其对中国的启示[J]．地球学报，2010,31(5):749-758.LI Ruiping,WANG Gaoshang,WANG Anjian,et al.Factor analysis of SO2emission trend in typical industrialized countries and its revelation to China[J]. Acta Geoscientica Sinica,2010,31(5):749-758.
• [3] III P,ARDEN C. Lung cancer,cardiopulmonary mortality,and long-term exposure to fine particulate air pollution[J].Journal of the American Medical Association,2002,287(9):1132-1141.
• [4]杜鹏瑞，杜睿，任伟珊．城市大气颗粒物毒性效应及机制的研究进展[J]．中国环境科学，2016,36(9):2815-2827.DU Pengrui,DU Rui,REN Weishan. Research progress on toxicological characteristics and mechanisms of urban atmospheric particulate matters[J]. China Environmental Science,2016,36(9):2815-2827.
• [5]贺克斌．大气颗粒物与区域复合污染[M]．北京:科学出版社，2011.HE Kebin. Atmospheric particulate matter and regional composite pollution[M].Beijing:Science Press,2011.
• [6] TWOMEY S.Pollution and the planetary albedo[J]. Atmospheric Environment,1974,41(12):1251-1256.
• [7]环保部、国家发改委、国家能源局．关于印发《全面实施燃煤电厂超低排放和节能改造工作方案》的通知[EB/OL].(2015-12-11). http://www. mee. gov. cn/gkml/hbb/bwj/201512/t20151215_319170.htm.
• [8]国务院关于印发打赢蓝天保卫战三年行动计划的通知[EB/OL].(2018-07-03). http://www. gov. cn/zhengce/content/2018-07/03/content_5303158.htm.
• [9]朗林茂，张子敬．国内外脱硫技术现状与对比[J]．内蒙古科技与经济，2015(10):66-68.LANG Linmao,ZHANG Zijing.Current situation and comparison of desulfurization technology at home and abroad[J]. Inner Mongolia Science Technology&Economy,2015(10):66-68.
• [10]王小明，薛建明，颜俭，等．国内外烟气脱硫技术的发展与现状:燃煤电厂烟气脱硫技术及经验专述之一[J]．电力环境保护，2000(1):31-34.WANG Xiaoming,XUE Jianming,YAN Jian,et al. Development and current situation of flue gas desulfurization technology at home and abroad:One of the special reports on flue gas desulfurization technology and experience of coal-fired power plants[J].Electric Power Technology and Environmental Protection,2000(1):31-34.
• [11]陈欢哲，何海霞，万亚萌，等．燃煤烟气脱硫技术研究进展[J]．无机盐工业，2019,51(5):6-11.CHEN Huanzhe,HE Haixia,WAN Yameng,et al. Research progress of coal-fired flue gas desulfurization technology[J].Inorganic Chemicals Industry,2019,51(5):6-11.
• [12] SHI W,LIN C,CHEN W,et al. Environmental effect of current desulfurization technology on fly dust emission in China[J]. Renewable&Sustainable Energy Reviews,2017,72:1-9.
• [13]周军英，汪云岗，钱谊．日本的二氧化硫污染控制对策[J]．污染防治技术，1999(1):42-45.ZHOU Junying,WANG Yungang,QIAN Yi. Countermeasure of sulfur dioxide pollution control in Japan[J]. Pollution Control Technology,1999(1):42-45.
• [14]张慧，齐庆杰，孟璐．石灰石-石膏湿法烟气脱硫在我国电厂的应用[J]．能源技术与管理，2007(4):47-49.ZHANG Hui, QI Qingjie, MENG Lu. Application of limestone-gypsum wet flue gas desulfurization in China's power plants[J]. Energy Technology and Management,2007(4):47-49.
• [15]姜正雄，魏宇．燃煤电厂石灰石-石膏湿法烟气脱硫技术概述[J]．装备机械，2012(2):60-65.JIANG Zhengxiong,WEI Yu.Limestone-gypsum wet flue gas desulfurization technology for coal-fired power plants[J].The Magazine on Equipment Machinery,2012(2):60-65.
• [16]曹冬梅．我国SO2污染、危害及控制技术[J]．环境科学导刊，2013,32(2):73-74.CAO Dongmei.Pollution,hazard and control technology of SO2in China[J].Environmental Science Survey,2013,32(2):73-74.
• [17]郑毓涵．燃煤电厂石灰石-石膏湿法烟气脱硫技术概述[J]．化学工程与装备，2015(1):179-181.ZHENG Yuhan.Overview of limestone gypsum wet flue gas desulfurization technology in coal-fired power plant[J]. Chemical Engineering&Equipment,2015(1):179-181.
• [18] NIELSEN M T,LIVBJERG H,FOGH C L,et al.Formation and emission of fine particles from two coal-fired power plants[J].Combustion Science and Technology,2002,174(2):79-113.
• [19] MEIJ R,WINKEL B H T. The emissions and environmental impact of PM10and trace elements from a modern coal-fired power plant equipped with ESP and wet FGD[J]. Fuel Processing Technology,2004,85(6):641-656.
• [20] DU Q,DONG H,LYU D,et al.Field measurements on the generation and emission characteristics of PM2.5generated by utility pulverized coal boiler[J]. Journal of the Energy Institute,2017,91(6):1009-1020.
• [21]魏宏鸽，叶伟平，柴磊，等．湿法脱硫系统除尘效果分析与提效措施[J]．中国电力，2015,48(8):33-36.WEI Hongge,YE Weiping,CHAI Lei,et al. Analysis of dust removal effect and efficiency improvement measures of wet desulfurization system[J].Electric Power,2015,48(8):33-36.
• [22]王珲，宋蔷，姚强，等．电厂湿法脱硫系统对烟气中细颗粒物脱除作用的实验研究[J]．中国电机工程学报，2008,28(5):1-7.WANG Yan,SONG Qiang,YAO Qiang,et al. Experimental study on removal of fine particles in flue gas by wet desulfurization system in power plant[J]. Proceedings of the CSEE,2008,28(5):1-7.
• [23]陈浩，骆仲泱，江建平，等．电厂湿法烟气脱硫颗粒物排放特性的实验研究[J]．动力工程学报，2017,37(11):925-930,937.CHEN Hao,LUO Zhongyang,JIANG Jianping,et al.Experimental study on particulate matter emission characteristics of wet flue gas desulfurization in power plants[J]. Journal of Chinese Society of Power Engineering,2017,37(11):925-930,937.
• [24]鲍静静，刘杭，潘京，等．石灰石-石膏法脱硫烟气PM2.5排放特性[J]．热力发电，2014,43(10):1-7.BAO Jingjing,LIU Hang,PAN Jing,et al.PM2.5emission characteristics of limestone-gypsum desulfurization flue gas[J].Thermal Power Generation,2014,43(10):1-7.
• [25]潘丹萍，吴昊，鲍静静，等．电厂湿法脱硫系统对烟气中细颗粒物及SO3酸雾脱除作用研究[J]．中国电机工程学报，2016,36(16):4356-4362,4519.PAN Danping,WU Hao,BAO Jingjing,et al.Removal effect of wet flue gas desulfurization system on fine particles and SO3acid mist from coal-fired power plants[J].Proceedings of the CSEE,2016,36(16):4356-4362,4519.
• [26]周科，聂剑平，张广才，等．湿法烟气脱硫燃煤锅炉烟气颗粒物的排放特性研究[J]．热力发电，2013,42(8):81-85,89.ZHOU Ke,NIE Jianping,ZHANG Guangcai,et al. Emission characteristics of particulate matter from coal-fired plant equipped with WFGD[J]. Thermal Power Generation,2013,42(8):81-85,89.
• [27]邓建国，马子轸，李振，等．不同湿法脱硫工艺对燃煤电厂PM2.5排放的影响[J]．环境科学，2019,40(8):3457-3462.DENG Jianguo,MA Zizhen,LI Zhen,et al. Effect of a wet flue gas desulphurization system on the emission of PM2.5from coal-fired power plants[J]. Environmental Science,2019,40(8):3457-3462.
• [28]王东歌，朱法华，易玉萍，等．基于实测的湿法脱硫系统对颗粒物去除效果的研究[J]．环境监测管理与技术，2015,27(5):21-24.WANG Dongge,ZHU Fahua,YI Yuping,et al. Removal efficiency of WFGD system to particles based on field tests[J].The Administration and Technique of Environmental Monitoring,2015,27(5):21-24.
• [29]潘丹萍．石灰石-石膏湿法脱硫过程中细颗粒物转化机制研究[D]．南京:东南大学，2017.PAN Danping.Study on the conversion mechanism of fine particles in limestone gypsum wet desulfurization process[D].Nanjing:Southeast University,2017.
• [30]王翱，宋蔷，姚强．脱硫塔内单液滴捕集颗粒物的数值模拟[J]．工程热物理学报，2014,35(9):1889-1893.WANG Ao,SONG Qiang,YAO Qiang. Numerical simulation of particle capture by single drop in desulfurization tower[J].Journal of Engineering Thermophysics,2014,35(9):1889-1893.
• [31]王翱．单液滴捕集细颗粒物的行为与机制研究[D]．北京:清华大学，2016.WANG Ao.Study on the behavior and mechanism of single droplet trapping fine particles[D].Beijing:Tsinghua University,2016.
• [32]岳焕玲，原永涛，宏哲．石灰石-石膏湿法烟气脱硫喷淋塔除尘机理分析[J]．电力环境保护，2006,22(6):13-15.YUE Huanling,YUAN Yongtao,HONG Zhe. Analysis of dust removal mechanism of limestone gypsum wet FGD spray tower[J].Electric Power Technology and Environmental Protection,2006,22(6):13-15.
• [33]郝润龙，赵毅，郭天祥．燃煤烟气湿法脱硫系统模型及优化运行[J]．动力工程学报，2016,36(10):822-826,841.HAO Ruilong,ZHAO Yi,GUO Tianxiang.Modeling and operation optimization of wet flue gas desulfu-rization system[J].Journal of Chinese Society of Power Engineering,2016,36(10):822-826,841.
• [34]陈俊峰，黄振仁，廖传华．烟气脱硫在我国的发展现状及研究进展[J]．电站系统工程，2008,24(4):4-6.CHEN Junfeng,HUANG Zhenren,LIAO Chuanhua. Development status and research progress of flue gas desulfurization in China[J].Power System Engineering,2008,24(4):4-6.
• [35]崔名双，周建明，张鑫，等．半干法脱硫剂的性能及脱硫机理[J]．煤炭转化，2019,42(3):55-61.CUI Mingshuang, ZHOU Jianming, ZHANG Xin, et al.Performance and desulfurization mechanism of semi-dry desulfurizer[J].Coal Conversion,2019,42(3):55-61.
• [36]蒋振华，杨林军，鲍静静，等半干法脱硫中应用蒸汽相变机理协同脱除PM2.5的技术分析[J]．现代化工，2008,28(10):68-70.JIANG Zhenhua,YANG Linjun,BAO Jingjing,et al. Technical analysis of synergistic removal of PM2.5using steam phase change mechanism in semi-dry desulfurization[J]. Modern Chemical Industry,2008,28(10):68-70.
• [37]刘锦辉，宋士娟，辛成运，等．半干法脱硫中应用蒸汽相变促进细颗粒脱除[J]．热能动力工程，2010,25(3):330-334,360-361.LIU Jinhui,SONG Shijuan,XIN Chengyun,et al. Application of steam phase change in semi-dry desulfurization to promote fine particle removal[J]. Journal of Engineering for Thermal Energy and Power,2010,25(3):330-334,360-361.
• [38]赵旭东，项光明，姚强，等．干法烟气脱硫固体颗粒物循环特性及微观机理研究[J]．中国电机工程学报，2006,26(1):70-76.ZHAO Xudong,XIANG Guangming,YAO Qiang,et al. Cycling characteristics and micro-mechanism of solid particles in dry flue gas desulfurization[J]. Proceedings of the CSEE,2006,26(1):70-76.
• [39]赵健飞．含湿脱硫灰对超细颗粒物团聚效应的研究[J]．中国电业(技术版)，2015(11):139-141.ZHAO Jianfei. Study on agglomeration effect of wet desulphurization ash on ultrafine particles[J]. China Electric Power(Technology Edition),2015(11):139-141.
• [40]高志平．气体悬浮吸收干法脱硫工艺[J]．电力环境保护，2001,17(3):54-56.GAO Zhiping. Dry desulfurization pocess by gas suspension absorption[J]. Electric Power Technology and Environmental Protection,2001,17(3):54-56.
• [41]于军玲，李守信，马双忱．电子束脱硫技术在我国的应用前景[J]．电力情报，2001(2):14-16.YU Junling,LI Shouxin,MA Shuangchen.Application prospects of electron beam desulfurization technology in China[J].Information on Electric Power,2001(2):14-16.
• [42]邱炜，周刚，付英杰．干法烟气脱硫综述[J]．电站系统工程，2005,21(3):19-20.QIU Wei,ZHOU Gang,FU Yingjie.Summary of dry flue gas desulfurization[J].Power System Engineering,2005,21(3):19-20.
• [43]陈亚非．烟气脱硫技术综述(续一)[J]．制冷空调与电力机械，2002,23(1):35-37,34.CHEN Yafei.Overview of flue gas desulfurization technology(Continued 1)[J].Power Generation&Air Condition,2002,23(1):35-37,34.
• [44]翁卫国，张军，李存杰．湿法脱硫系统“石膏雨”问题的成因及解决对策[J]．化工进展，2015,34(1):239-244.WENG Weiguo,ZHANG Jun,LI Cunjie.Origin and solution of the"gypsumrain"problem of limestone-gypsum WFGD system[J].Chemcal Industry and Engineering Progress,2015,34(1):239-244.