电站锅炉SCR系统改造前后数值模拟分析
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摘要
以某电站锅炉脱硝系统为例,对催化剂磨损、脱硝效率低等问题进行分析研究,通过数值模拟计算的方法,确定烟道内流场及灰场分布,对上述问题影响较大,最后提出对三角筋及导流板进行改造,极大地改善了气流和灰场的分布,减轻了催化剂的磨损,确保脱硝系统安全、可靠、经济运行。
Taking a denitrification system of utility boiler as an example to analyze and study the catalyst wearing, the low denitrification efficiency and some other problems. Using numerical simulation to ascertain the distribution of flow field and fly ash pond of the flue which has great influence on the above problems. As the result, it proposed that rebuilding the triangular reinforcement and the guide plate which greatly improves the distribution of flow field and ash pond that reducing the wear of catalyzer and ensuring the safe, reliable and economic operation of denitrification system.
Taking a denitrification system of utility boiler as an example to analyze and study the catalyst wearing, the low denitrification efficiency and some other problems. Using numerical simulation to ascertain the distribution of flow field and fly ash pond of the flue which has great influence on the above problems. As the result, it proposed that rebuilding the triangular reinforcement and the guide plate which greatly improves the distribution of flow field and ash pond that reducing the wear of catalyzer and ensuring the safe, reliable and economic operation of denitrification system.
引文
[1]朱法华,刘大钧,王圣.火电厂NOx排放及控制对策审视[J].环境保护, 2009,(21):40~41.
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[5]杨松,丁皓姝,黄越.SCR脱硝系统流场数值模拟及优化[J].热力发电, 2014,(9):71~75.
[6]张强,许世森,王志强.选择性催化还原烟气脱硝技术进展及工程应用[J].热力发电, 2004, 4(1):1~6.
[7]盛波,韦红旗,朱亚迪.脱硝系统横梁结构对催化剂磨损的影响[J].动力工程学报, 2015, 35(6):490~492.
[8]王东,罗祥,马国伟.660MW机组SCR脱硝系统流场优化试验研究[J].电站系统工程, 2017, 33(4):18~19.
[9]张洁,张杨.燃煤电站SCR烟气脱硝工程技术关键问题研究[J].电力科技与环保, 2011, 27(2):38~41.
[10]杨超,张杰群,郭婷婷,等.火电厂SCR烟气脱硝技术及其催化剂研究进展[J].热电技术, 2011,(3):11~13.
[11]孙艺心,韩强.SCR脱硝系统催化剂防磨措施的探讨[J].锅炉制造,2013,(4):39~41.
[2]王福军.计算流体动力学分析:CFD软件原理与应用[M].北京:清华大学出版社, 2004. 25~33.
[3]兰中秋.电站锅炉尾部烟道湍流气固两相流场的数值模拟[D].重庆:重庆大学, 2003.
[4]汤元强.燃煤电厂SCR烟气脱硝系统优化与飞灰颗粒运动的研究[D].上海:上海交通大学, 2012:33~36.
[5]杨松,丁皓姝,黄越.SCR脱硝系统流场数值模拟及优化[J].热力发电, 2014,(9):71~75.
[6]张强,许世森,王志强.选择性催化还原烟气脱硝技术进展及工程应用[J].热力发电, 2004, 4(1):1~6.
[7]盛波,韦红旗,朱亚迪.脱硝系统横梁结构对催化剂磨损的影响[J].动力工程学报, 2015, 35(6):490~492.
[8]王东,罗祥,马国伟.660MW机组SCR脱硝系统流场优化试验研究[J].电站系统工程, 2017, 33(4):18~19.
[9]张洁,张杨.燃煤电站SCR烟气脱硝工程技术关键问题研究[J].电力科技与环保, 2011, 27(2):38~41.
[10]杨超,张杰群,郭婷婷,等.火电厂SCR烟气脱硝技术及其催化剂研究进展[J].热电技术, 2011,(3):11~13.
[11]孙艺心,韩强.SCR脱硝系统催化剂防磨措施的探讨[J].锅炉制造,2013,(4):39~41.