声波与相变耦合协同湿法烟气脱硫细颗粒脱除
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摘要
结合WFGD烟气的特性,对声波与相变耦合作用协同湿法烟气脱硫促进细颗粒脱除进行了实验研究。探讨不同操作参数对WFGD细颗粒脱除效果的影响特征。结果表明:在过饱和度S=1.15的蒸汽环境中,分级脱除效率较低,低于40%;声波单独作用下,细颗粒的脱除效率与相变单独作用相比有一定程度的提高;与单独声波团聚和相变作用相比,在声波和相变耦合作用下,细颗粒的脱除效率得到了极大的提升,最高分级脱除效率达到80%以上。当烟气过饱和度大于1.0时,细颗粒脱除效率随过饱和度的增大而迅速提高,如过饱和度为1.15时,细颗粒的脱除效率达到了70%以上;细颗粒脱除效率随声压级的增大而提高,声波与相变耦合作用促进湿法脱硫细颗粒脱除的合理声压级在130-150dB之间。利用WFGD烟气水汽含量高的特性,可以有效降低耦合作用下,蒸汽的消耗量,并实现低声压级条件下,高效脱除WFGD排放细颗粒。
引文
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[19]Fletcher N.Size effect in heterogeneous nucleation[J].The Journal of Chemical Physics,1958,29(3):572-576.
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[21]颜金培,杨林军,张霞,孙露娟,张宇,沈湘林.应用蒸汽相变机理脱除燃煤可吸入颗粒物实验研究[J].中国电机工程学报,2007,27(35):12-16.Yan Jin-pei,Yang Lin-jun,Zhang Xia,Sun Lu-juan,Zhang Yu,Shen Xiang-lin.Experimental study on separation of inhalable particles from coal combustion by heterogeneous condensation enlargement[J].Proceedings of the CSEE,2007,27(35):12-16.
[22]Jinpei Yan,Liqi Chen,Zhong Li,Removal of fine particles from coal combustion in the combined effect of acoustic agglomeration and seed droplets with wetting agent,Fuel,Volume 165,1 February 2016,Pages 316-323.
[2]Garcia-Nieto P.Study of the evolution of aerosol emissions from coal-fired power plants due to coagulation,condensation,and gravitational settling and health impact[J].Journal of Environmental Management,2006,79(4):372-382.
[3]张小曳,孙俊英,王亚强,李卫军,张蔷,王炜罡,权建农,曹国良,王继志,杨元琴,张养梅.我国雾-霾成因及其治理的思考[J].科学通报,2013,58(13):1178-1187.ZHANG Xiao-ye,SUN Jun-ying,WANG Ya-qiang,LI Wei-jun,ZHANG Qiang,WANG Wei-gang,QUAN Jian-nong,CAO Guo-Hang,WANG Ji-zhi,YANG Yuan-qin,ZHANG Yang-mei.Factors contributing to haze and fog inChina[J].China science Bull,2013,58(13):1178-1187(in Chinese).
[4]杨林军,颜金培,沈湘林.蒸汽相变促进燃烧源PM_(2.5)凝并长大的研究现状及展望[J].现代化工,2005,25(11):22-26.Yang Linjun,Yan Jinpei,Shen Xianglin.Prospect and advances in growth of PM_(2.5)from combustion by vapor condensation[J].Modern Chemical Industry,2005,25(11):22-26(in Chinese).
[5]颜金培,杨林军,张霞,孙露娟,张宇,沈湘林.应用蒸汽相变机理脱除燃煤可吸入颗粒物实验研究[J].中国电机工程学报,2007,35(27):12-16.YAN Jin-pei,YANG Lin-jun,ZHANG Xia,SUN Lu-juan,ZHANG Yu,SHEN Xiang-lin.Experiment study on separation of inhalable particles from coal combustion by heterogeneous condensation enlargement[J].Proceedings of the CSEE,2007,35(27):12-16(in Chinese).
[6]Meij R,Winekl H.The emissions and environmental impact of PM10 and trace elements from a modern coal-fired power plant equipped with ESP and wet FGD[J].Fuel Processing Technology,2004,85(6/7):641-656.
[7]Linjun Yang,Jingjing Bao,Jinpei Yan,Jinhui Liu,Shijuan Song,Fengxian Fan,Removal of fine particles in wet flue gas desulfurization system by heterogeneous condensation[J].Chemical Engineering Journal,2010,156(1)1:25-32.
[8]Jingjing Bao,Linjun Yang,Weidi Sun,Junfeng Geng,Jinpei Yan,Xianglin Shen,Removal of fine particles by heterogeneous condensation in the double-alkali desulfurization process[J].Chemical Engineering and Processing:Process Intensification,2011,50(8):828-835.
[9]Jinpei Yan,Jingjing Bao,Linjun Yang,Fengxian Fan,Xianglin Shen,The formation and removal characteristics of aerosols in ammonia-based wet flue gas desulfurization,Journal of Aerosol Science,Volume 42,Issue 9,September 2011,Pages 604-614,
[10]Bao Jingjing,Yang Linjun,Yan Jinpei,Xiong Guilong,Lu Bin,Xin Chengyun,Experimental study of fine particles removal in the desulfurated scrubbed flue gas,Fuel,Volume 108,June 2013,Pages 73-79,
[11]RIERA-FRANCO E S,GALLEGO-JUAREZ J A,RODRIGUEZ-CORRAL G L.Application of high-power ultrasound of enhances fluid/solid particle separation processes[J].Ultrasonics,2000,38(5):642-646.
[12]HOFFMANN T L,CHEN W,KOOPMANN G H.Experimental and numerical analysis of bimodal acoustic agglomeration[J].J.Vibration and Acoustics,1993,115(3):232-240.
[13]HOFFMANN T L,KOOPMANN G H.A new technique for visualization of acoustic particle agglomeration[J].Am.Ins.Phy.,1994,65(5):1527-1536.
[14]赵兵,陈厚涛,徐进,沈湘林.声波与种子颗粒联合作用下细颗粒脱除的实验研究[J].动力工程,2007,27(5):785-788.(ZHAO Bing,CHEN Huo-tao,XU Jin,SHEN Xiang-lin.Experimental study on precipitation of fine particles under the combined action of acoustic waves and seed particles[J].Journal of Power Engineering,2007,27(5):785-788.)
[15]陈厚涛,赵兵,章汝心,曹金祥,沈湘林.声波与雾化水滴联合作用增强燃煤PM_(2.5)脱除的实验研究[J].中国电机工程学报,2009,29(2):35-40.(CHEN Huo-tao,ZHAO Bing,ZHANG Ru-xin,CAO Jin-xiang,SHEN Xiang-lin.Experimental study on the enlargement of removing PM_(2.5)in coal-fired fumes under the combined effect of acoustic wave and atomized water drop[J].Proceedings of the CSEE,2009,29(2):35-40.)
[16]王洁,张光学,刘建忠,周俊虎,岑可法.种子颗粒对声波团聚效率的影响[J].化工学报,2011,62(2):355-361.(WANG Jie,ZHANG Guang-xue,LIU Jian-zhong,ZHOU Jun-hu,CEN Ke-fa.Effect of seed particles on acoustic agglomeration efficiency[J].Journal of Chemical Industry and Engineering,2011,62(2):355-361.
[17]Jinpei Yan,Liqi Chen,Linjun Yang,Combined effect of acoustic agglomeration and vapor condensation on fine particles removal,Chemical Engineering Journal,Volume 290,15 April 2016,Pages 319-327.
[18]颜金培,陈立奇,杨林军.燃煤细颗粒在过饱和氛围下声波团聚脱除的实验研究[J].化工学报,2014,65(8):3243-3249.Yan Jinpei,Chen Liqi,Yang Linjun.Agglomeration removal of fine particles at super-saturation steam by using acoustic wave[J].Journal of Chemical Industry and Engineering,2014,65(8):3243-3249.
[19]Fletcher N.Size effect in heterogeneous nucleation[J].The Journal of Chemical Physics,1958,29(3):572-576.
[20]Heidenreich S,Ebert F.Condensational droplet growth as a preconditioning technique for the separation of submicron particles from gases[J].Chemical Engineering and Processing,1995,34:235-244.
[21]颜金培,杨林军,张霞,孙露娟,张宇,沈湘林.应用蒸汽相变机理脱除燃煤可吸入颗粒物实验研究[J].中国电机工程学报,2007,27(35):12-16.Yan Jin-pei,Yang Lin-jun,Zhang Xia,Sun Lu-juan,Zhang Yu,Shen Xiang-lin.Experimental study on separation of inhalable particles from coal combustion by heterogeneous condensation enlargement[J].Proceedings of the CSEE,2007,27(35):12-16.
[22]Jinpei Yan,Liqi Chen,Zhong Li,Removal of fine particles from coal combustion in the combined effect of acoustic agglomeration and seed droplets with wetting agent,Fuel,Volume 165,1 February 2016,Pages 316-323.