摘要
在自行研制的试验台上对NOxOUT工艺进行了试验研究,结合化学反应动力学模拟研究了CO(NH2)2还原NO过程中的关键影响因素。试验中最佳的尿素溶液喷入温度为850～900℃,NO的还原率最高可达到83%。利用Chemkin 4.1均相反应模型,模拟NOxOUT工艺所得的最佳反应温度窗口及其在各温度下的NOx去除率与试验数据进行对比,结果基本吻合。NSR的增加和停留时间的加长都有利于NO的脱除;但随着NSR的增加,烟气中N2O的生成量也随之增加而影响脱硝效率。试验中检测到烟气尾气中的碱性随着NSR的增加而增大,随着温度的增大而降低,模拟结果与试验结果基本吻合。
The NOxOUT process has been investigated experimentally by using a laboratory reactor that approximates the well-stirred conditions.Simultaneously,the key influencing factors in the process of the NOxOUT process was studied by comprehensive chemical reaction kinetics model,the excessively high temperature,and the excessively low temperature will not favor NO production,the best temperature range for urea solution spraying in this test platform is 850~900 ℃,the highest NO reduction rate might reach 83%;The experimental results show,it might not only deduce some general trends of the NOxOUT process,but also to validate a detailed kinetic mechanism.By using the homogeneous phase reaction model of the software of Chemkin4.1,the simulation on the opti-mal reaction temperature for NOxOUT process and the comparison on the simulated NOx removal rate and experiment data was conducted,the results are approximately same.The effect of increas-ing the NSR ratio and lengthening resident time are more favorable for the NO removing,moreover,along with the increasing of NSR,the N2O production will also be increased,which will influence the denitrate efficiency.In the experiment,the flue alkalescence will be increased along with the increasing of the NSR,will be decreased along with the increasing of temperature,the simulation result is nearly same as the experimental result.
出处
《可再生能源》
CAS
北大核心
2010年第3期53-58,共6页
Renewable Energy Resources
基金
国家高新技术研究发展计划“863”项目(2008AA05Z303)
国家自然科学基金项目(50776019)
教育部新世纪优秀人才支持计划资助(NCET-05-0469)
