本文主要研究内容
作者张冲冲（2019）在《循环流化床锅炉变负荷过程中污染物排放动态特性研究》一文中研究指出：燃煤烟气污染物超低排放是火力发电的重要技术指标之一。循环流化床（CFB）燃煤技术是洁净煤技术中污染物控制成本最低、同样煤种情况下适应性最好的技术,其具有炉内高效脱硫和低氮燃烧特性。近年来,各研究者对循环流化床锅炉炉内脱硫和抑制NOx生成的研究很多。随着循环流化床锅炉总装机容量的增加和燃煤烟气超低排放的环保要求,对循环流化床锅炉全工况运行范围内的燃烧污染物生成提出了更高的要求。本文以某350MW超临界循环流化床锅炉为研究对象,通过建立脱硫脱硝数学模型以及循环流化床锅炉流动、燃烧、传热整体数学模型,开展变负荷过程中循环流化床锅炉污染物排放动态特性研究,为炉内燃烧污染物控制提供技术支持。本文首先建立了循环流化床锅炉整体动态数学模型,模型集成了炉膛内流动、燃烧、传热以及污染物生成与脱除等各子模型。正确描述床内密相区和稀相区的流动特性、燃烧特性以及传热特性。其次,在循环流化床锅炉整体数学模型的基础上,建立了循环流化床锅炉动态数学模型。将炉膛沿高度划分为一系列的小室,在各个小室内分别建立物料动态平衡方程、碳质量动态平衡方程、各气体质量动态平衡方程以及能量动态平衡方程,计算各个小室内各参量的动态变化。最后,基于MATLAB/SIMULINK平台,建立了350MW循环流化床锅炉燃烧动态仿真模型。计算锅炉满负荷下各参量沿炉膛高度的变化;仿真分析给煤和二次风阶跃变化下污染物排放变化;分析钙硫摩尔比、一二次风配比以及上下二次风配比等参量变化对炉内原始SO2、NOx排放浓度的影响。仿真研究与结果表明:（1）增加钙硫摩尔比可以快速降低SO2排放。降负荷时,当钙硫摩尔比从2升高到2.2时,SO2排放浓度即可降低到降负荷之前的浓度水平;（2）降低一次风比可以有效降低SO2和NOx排放。升负荷时,当一次风比从48%降低到42%时,NOx排放浓度降低到低于升负荷之前的浓度水平。降负荷时,当一次风比从48%降低到45%时,SO2排放浓度降低了11.34%;（3）增加上下二次风配比可以降低NOx排放,但会导致SO2排放浓度升高,所以在增加上下二次风配比调节NOx排放的同时需增加钙硫摩尔比来控制SO2排放。升负荷时可通过降低一次风比或增加上下二次风配比来降低NOx排放浓度,NOx排放浓度每降低1mg/Nm3,一次风比需降低0.29%或者上下二次风配比升高1.36%。降负荷时可通过增加钙硫摩尔比来降低SO2排放浓度,SO2排放浓度每降低1mg/Nm3,钙硫摩尔比需增加0.23%。
Abstract
ran mei yan qi wu ran wu chao di pai fang shi huo li fa dian de chong yao ji shu zhi biao zhi yi 。xun huan liu hua chuang （CFB）ran mei ji shu shi jie jing mei ji shu zhong wu ran wu kong zhi cheng ben zui di 、tong yang mei chong qing kuang xia kuo ying xing zui hao de ji shu ,ji ju you lu nei gao xiao tuo liu he di dan ran shao te xing 。jin nian lai ,ge yan jiu zhe dui xun huan liu hua chuang guo lu lu nei tuo liu he yi zhi NOxsheng cheng de yan jiu hen duo 。sui zhao xun huan liu hua chuang guo lu zong zhuang ji rong liang de zeng jia he ran mei yan qi chao di pai fang de huan bao yao qiu ,dui xun huan liu hua chuang guo lu quan gong kuang yun hang fan wei nei de ran shao wu ran wu sheng cheng di chu le geng gao de yao qiu 。ben wen yi mou 350MWchao lin jie xun huan liu hua chuang guo lu wei yan jiu dui xiang ,tong guo jian li tuo liu tuo xiao shu xue mo xing yi ji xun huan liu hua chuang guo lu liu dong 、ran shao 、chuan re zheng ti shu xue mo xing ,kai zhan bian fu he guo cheng zhong xun huan liu hua chuang guo lu wu ran wu pai fang dong tai te xing yan jiu ,wei lu nei ran shao wu ran wu kong zhi di gong ji shu zhi chi 。ben wen shou xian jian li le xun huan liu hua chuang guo lu zheng ti dong tai shu xue mo xing ,mo xing ji cheng le lu tang nei liu dong 、ran shao 、chuan re yi ji wu ran wu sheng cheng yu tuo chu deng ge zi mo xing 。zheng que miao shu chuang nei mi xiang ou he xi xiang ou de liu dong te xing 、ran shao te xing yi ji chuan re te xing 。ji ci ,zai xun huan liu hua chuang guo lu zheng ti shu xue mo xing de ji chu shang ,jian li le xun huan liu hua chuang guo lu dong tai shu xue mo xing 。jiang lu tang yan gao du hua fen wei yi ji lie de xiao shi ,zai ge ge xiao shi nei fen bie jian li wu liao dong tai ping heng fang cheng 、tan zhi liang dong tai ping heng fang cheng 、ge qi ti zhi liang dong tai ping heng fang cheng yi ji neng liang dong tai ping heng fang cheng ,ji suan ge ge xiao shi nei ge can liang de dong tai bian hua 。zui hou ,ji yu MATLAB/SIMULINKping tai ,jian li le 350MWxun huan liu hua chuang guo lu ran shao dong tai fang zhen mo xing 。ji suan guo lu man fu he xia ge can liang yan lu tang gao du de bian hua ;fang zhen fen xi gei mei he er ci feng jie yue bian hua xia wu ran wu pai fang bian hua ;fen xi gai liu ma er bi 、yi er ci feng pei bi yi ji shang xia er ci feng pei bi deng can liang bian hua dui lu nei yuan shi SO2、NOxpai fang nong du de ying xiang 。fang zhen yan jiu yu jie guo biao ming :（1）zeng jia gai liu ma er bi ke yi kuai su jiang di SO2pai fang 。jiang fu he shi ,dang gai liu ma er bi cong 2sheng gao dao 2.2shi ,SO2pai fang nong du ji ke jiang di dao jiang fu he zhi qian de nong du shui ping ;（2）jiang di yi ci feng bi ke yi you xiao jiang di SO2he NOxpai fang 。sheng fu he shi ,dang yi ci feng bi cong 48%jiang di dao 42%shi ,NOxpai fang nong du jiang di dao di yu sheng fu he zhi qian de nong du shui ping 。jiang fu he shi ,dang yi ci feng bi cong 48%jiang di dao 45%shi ,SO2pai fang nong du jiang di le 11.34%;（3）zeng jia shang xia er ci feng pei bi ke yi jiang di NOxpai fang ,dan hui dao zhi SO2pai fang nong du sheng gao ,suo yi zai zeng jia shang xia er ci feng pei bi diao jie NOxpai fang de tong shi xu zeng jia gai liu ma er bi lai kong zhi SO2pai fang 。sheng fu he shi ke tong guo jiang di yi ci feng bi huo zeng jia shang xia er ci feng pei bi lai jiang di NOxpai fang nong du ,NOxpai fang nong du mei jiang di 1mg/Nm3,yi ci feng bi xu jiang di 0.29%huo zhe shang xia er ci feng pei bi sheng gao 1.36%。jiang fu he shi ke tong guo zeng jia gai liu ma er bi lai jiang di SO2pai fang nong du ,SO2pai fang nong du mei jiang di 1mg/Nm3,gai liu ma er bi xu zeng jia 0.23%。
论文参考文献
论文详细介绍
论文作者分别是来自太原理工大学的张冲冲，发表于刊物太原理工大学2019-07-26论文，是一篇关于循环流化床锅炉论文,变负荷论文,污染物排放论文,动态特性论文,仿真论文,太原理工大学2019-07-26论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自太原理工大学2019-07-26论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：循环流化床锅炉论文; 变负荷论文; 污染物排放论文; 动态特性论文; 仿真论文; 太原理工大学2019-07-26论文;