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燃烧优化调整对NOx排放和锅炉效率的影响 预览

Effect of combustion optimization adjustment on NOx emission and boiler efficiency
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摘要 为研究燃烧调整对NOx排放和锅炉效率的影响,在330 MW煤粉炉机组满负荷运行工况下,通过调整过量空气系数、SOFA风开度、二次风配风方式、周界风开度以及燃烧器摆角,测定了尾部烟道SCR入口A、B两侧的NOx排放浓度及其相关数据,并计算得到锅炉效率,研究了各因素对NOx排放浓度和锅炉效率的影响。结果表明,运行氧含量较低时能降低NOx浓度并保证较高的锅炉效率;倒塔配风的NOx排放浓度比正塔配风和均等配风分别低约9.1%和7.8%,倒塔配风最低,正塔配风最高;锅炉效率随着SOFA风开度的减小呈先上升后下降趋势,而NOx浓度呈递增趋势;随着周界风开度的逐渐增大,锅炉效率先减小后增加,而NOx排放逐渐增大,周界风开度变化7%,锅炉效率变化1%左右;随着燃烧器摆角的增加锅炉效率先呈上升后呈下降趋势,而NOx浓度呈下降趋势。 In order to study the effect of combustion optimization adjustment on NOx emission and boiler efficiency,the NOx emission concentration of tail flue in A and B sides was measured by adjusting the excess air coefficient,SOFA wind opening,secondary air distribution mode,surrounding air opening and burner swing angle.Besides,the boiler efficiency was calculated by recording the related data of DCS and collecting samples.Effect of combustion optimization adjustment on NOx emission and boiler efficiency was researched.The results show that NOx concentration can be reduced and higher boiler efficiency can be guaranteed by decreasing oxygen contents.The NOx emission concentration of inverted tower is 9.1% and 7.8% lower than the normal tower and equal distribution wind,respectively.The inverted tower is the lowest and normal tower is the highest.The boiler efficiency increases with the increase of SOFA wind opening and later slightly decreases,while the concentration of NOx increases with the increase of SOFA wind opening.With the increase of surrounding air opening,boiler efficiency firstly decreases and then increases,while the NOx emissions increases gradually.The boiler efficiency changes about 1% with surrounding air opening increasing 7%.The boiler efficiency firstly increases and then decreases with the increase of burner swing angle.
作者 蔡培 葛荣存 葛铭 陈辉 陈国庆 王秀军 戴维葆 CAI Pei, GE Rongcun, GE Ming, CHEN Hui, CHEN Guoqing, WANG Xiujun, DAI Weibao(Key Laboratory for Clean and Efficient Coal-Fired Power Generation and Pollution Control, Guodian Science and Technology Research Institute ,Nanjing 210023, China)
出处 《洁净煤技术》 CAS 2018年第5期77-83,共7页 Clean Coal Technology
基金 中国国电集团公司科技项目(D2017Y006)
关键词 NOX排放 燃烧优化调整 锅炉效率 电站锅炉 过量空气系数 配风方式 NOx emission combustion optimization adjustment boiler efficiency plant boiler excess air coefficient air distribution mode
作者简介 蔡培(1963-),男,安徽合肥人,高级工程师,硕士,主要从事电力试验检测研究。E-mail: caipei3514@ 126. com
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