第4期 杨泽伦:SCR烟气脱硝工程设计原则和关键设计技术 可达92.5%;(2)NH3逃逸率为2x 10一 (体积分 数);(3)SO2向SO3的转化率为0.5%;(4)催化剂 DONG Chen,WANG Xiaobing,NIU Guoping.Application of economizer bypass on selective catalyst reduction system[JJ _Thermal Power Generation,2014,43(3):96—100. [5】张波,牛国平,王月明,等.SCR系统急转烟道均流装置的数值 模拟【J].热力发电,2014,43(4):87—94. 寿命为32 000 h/4年;(5)烟气温度最高为453 qC, 最低为322℃。 4结语 本文在借鉴国内外SCR烟气脱硝系统设计和 ZHANG Bo,NIU Guoping,WANG Yueming,et o1.Numerical simulation on a new type sharp flue equalizing device in SCR system[JJ_Thermal Power Generation,2014,43(4):87—94. 运行经验的基础上.结合国内实际应用状况.提 出了SCR脱硝系统的工程设计原则和关键设计技 【6】杨松,丁皓姝,黄越.SCR脱销系统流场数值模拟及优化fJ1.热 力发电,2014,43(9):71—75. YANG Song,DING Haoshu,HUANG Yue.Numerical simulation 术,同时.针对出现的催化剂使用寿命短、磨损 严重、氨逃逸率高、S02/S0 转换率不易控制等实 际问题,提出了具体的解决方案。实践表明.运 用这些工程设计原则和关键设计技术.有益于提 高脱硝能力 and optimization of flow field in an SCR[J].Thermal Power Generation,2014,43(9):71-75. [7]FORZATYI P.Present status and perspectives in De—NO SCR catlaysis[J].Applied Catlysais A:Generl,2a001(222):221—236. [8]FREY H C.Engineering—economic evaluation of SCR NO control 参考文献: 【1]杨青山,廖永进.降低SCR脱销装置最低投运负荷的策略研究 【J].中国电力,2014,47(9):153—155. YANG Qingshan.LIAO Yongjin.The strategy on reduction of SCR minimum operation load[J】.Electirc Power,2014,47(9): 153—155. system for coal—ifred power plants[J1_Proceedings of the American Power Conference,1995(57):1583—1588. [9]BOSCH H,JANSSEN F.Catalytic reduction of nitrogen oxides:A review on the fundmentals and technology[J1.Catalysis Today, 1998(2):369. [10】HEALY E C.Popcom lfyash experience,Presentation at the 2004 PCUG NO roundtable workshop[C】.Akron,OH,January 27, 2004. [2】刘红辉,刘伟,黄锐,等.燃煤电厂SCR脱销催化剂失活及其 再生性能研究[J】.中国电力,2014,47(4):139—143. LIU Honghui,LIU Wei,HUANG Rui,et 01.Study on performance [1 1]IDELCHICK I E.Handbook of hydraulic resistance[R].Hemisphere Publishing Co.,Second Edition,1986. of deactivated and regenerated catalysts for coal—irfed power plant [12】欧洲经济委员会,电力部环境保护办公室.氮氧化物排放控制 技术经验总结rRI.1994. SCR denitration[J】_Electirc Power,2014,47(4):139—143. [31孟小然,于艳科,陈进生,等.平板式SCR催化剂的性能检测[J】 _中国电力,2014,47(12):14_4—147. MENG Xiaoran,YU Yanke,CHEN Jinsheng,et 01.Performance [13]李德波,廖永进,徐齐胜,等.燃煤电站SCR脱销催化剂更换 策略研究[JJ.中国电力,2014,47(3):155—159. LI Debo,LIAO Yongjin,XU Qisheng,et o1.Study on SCR catalyst replacing strategy in coal—ifred power plants[JJ_EleetHc Power,2014,47(3):155-159. testing of plate SCR catalyst fJ].Electirc Power,2014,47(12): 144—147. [4】董陈,王晓冰,牛国平.省煤器烟气旁路在SCR脱销系统中的 应用【J].热力发电,2014,43(3):96—100. (责任编辑李秀平) Principles and Key Techniques for SCR De—NOx Engineering Design YANG Zelun (FosterWheelerEnergyManagement(Shanghai)Co.,Ltd.,Pudong,Shanghai200122,China) Abstract:Aiming at the existing problems in SCR system due to the lack of SCR engineering design experience in the countrysuch as ,short lifeeycle of SCR catalyst,high equipment erosion,high ammonia slip and SOJSO3 transforming ratios,the principles and key techniques for SCR engineering design are introduced based on the foreign and domestic experiences as well as the summaries of continuous research and development practices.In particular,the effects and applications of the techniques are presented in details. Meanwhile,the analysis on the problems arising from the current SCR design and operation is conductedand the technical precautions or f,the design are proposed to improve the application level of the SCR technology so that SCR can reach higher eficiencybettfer economic ,performance and higher reliability. Keywords:thermal power plant;NO emission;SCR denitriifcation;design principle;improvement