摘要
国内某1 000 MW超超临界参数变压直流电站锅炉布袋除尘器入口烟气流场均匀性差,导致喷水减温系统启动,进而影响布袋除尘器安全、高效运行。基于现场测试及烟道结构进行数值模拟,确定了导流板加装方案。改造后,布袋除尘器入口烟气温度和烟气速度分布均匀性得到明显改善。
The large deviation of the flue gas flow field uniformity at bag filter entrance in a domestic 1 000 MW ultra-supercritical once-through boiler leaded to the start-up of its water spraying desuperheating system and affected its safe and efficient operation. The deflector was installed based on the numerical simulation and on-site test. After installation,the uniformity of the flue gas velocity and temperature at the bag filters entrances is improved obviously.
引文
[1]徐妍,李文彦.SCR脱硝反应器导流板的结构设计[J].热力发电,2008,37(10):49-52,54.
[2]朱天宇,李德波,方庆艳,等.燃煤锅炉SCR烟气脱硝系统流场优化的数值模拟[J].动力工程学报,2015,35(6):481-488,508.
[3]陈冬林,刘欢,邹婵,等.300 MW燃煤锅炉烟气SCR脱硝系统流场的数值模拟与优化设计[J].电力科学与技术学报,2013,28(1):103-108.
[4]张波,张伟,牛国平.300 MW机组锅炉SCR装置流场研究[J].热力发电,2012,41(7):22-24,48.
[5]周健.SCR反应器入口段流场均匀性的数值模拟研究[D].保定:华北电力大学,2008.
[6]张波,张伟,朱国平.300 MW机组锅炉SCR装置流场研究[J].热力发电,2012,41(7):22-24,48.
[7]蒋新伟,施平平,钟毅,等.电站锅炉SCR系统流场的冷态试验与数值模拟的研究[J].能源工程,2010(3):51-55.
[8]杨超,张杰群,郭婷婷.SCR烟气脱硝装置烟气流场数值模拟[J].东北电力大学学报,2012,32(1):66-70.
[9]刘建全,孙保民,白涛,等.600 MW超临界旋流燃烧锅炉炉内温度场数值模拟及优化[J].中国电机工程学报,2011,31(2):15-21.
[10]王超,程乐鸣,周星龙,等.600 MW超临界循环流化床锅炉炉膛气固流场的数值模拟[J].中国电机工程学报,2011,31(14):1-7.
[11]夏钧,钱力庚,樊建人,等.330 MW对冲锅炉炉内流场模拟及实验研究[J].动力工程,2002,22(3):1772-1775,1811.
[12]CHAE H J,CHOO S T,CHOI H,et al.Direct use of kinetic parameters for modeling and simulation of a selective catalytic reduction process[J].Industrial&Engineering Chemistry Research,2000,39(5):1159-1170.
[13]XU Y Y,ZHANG Y,WANG J C,et al.Application of CFDin the optimal design of a SCR-DeNOxsystem for a 300 MWcoal-fired power plant[J].Computers&Chemical Engineering,2013,49:50-60.
[14]陈太平.300 MW煤粉锅炉SCR烟气脱硝装置数值模拟及结构优化[D].哈尔滨:哈尔滨工业大学,2015.
[15]PILLIER L,IDIR M,MOLET J,et al.Experimental study and modellingn of NOxformation in high pressure counterflow premixed CH4/air flames[J].Fuel,2015,150(1):394-407.