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[1]原奇鑫,赵立正,翟 刚,等.NH3选择性非催化还原脱硝影响因素[J].燃烧科学与技术,2017,(04):378-382.[doi:DOI 10.11715/rskxjs.R201605034]
 Yuan Qixin,Zhao Lizheng,Zhai Gang,et al.Impact Factors of Selective Non-CatalyticReduction Denitration by NH3[J].Journal of Combustion Science and Technology,2017,(04):378-382.[doi:DOI 10.11715/rskxjs.R201605034]
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NH3选择性非催化还原脱硝影响因素()
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《燃烧科学与技术》[ISSN:1006-8740/CN:12-1240/TK]

卷:
期数:
2017年04
页码:
378-382
栏目:
出版日期:
2017-08-15

文章信息/Info

Title:
Impact Factors of Selective Non-Catalytic Reduction Denitration by NH3
作者:
原奇鑫赵立正翟 刚孙保民
华北电力大学电站设备状态监测与控制教育部重点实验室,北京 102206
Author(s):
Yuan QixinZhao LizhengZhai GangSun Baomin
Key Laboratory of Condition Monitoring and Control for Power Plant Equipment,Ministry of Education, North China Electric Power University,Beijing 102206,China
关键词:
选择性非催化还原脱硝影响因素循环灰NH3
Keywords:
selective non-catalytic reduction(SNCR)NO reductionimpact factorscirculating ashNH3
分类号:
O6-3
DOI:
DOI 10.11715/rskxjs.R201605034
文献标志码:
A
摘要:
为达到超低排放标准,某电厂筹备660,WM 超临界循环流化床机组时在旋风分离器处安装SNCR脱硝设 备.通过实验方法研究温度、氨氮摩尔比(RNS)、氧含量和循环灰对SNCR 脱硝的影响.结果表明,温度从800, ℃提升到950,℃,脱硝率不断提高且在950,℃达到峰值,再继续升温由于NH3氧化作用脱硝率下降;在温度低于 850,℃时,温度是反应的控制因素,提升RNS 影响不大,在温度超过850,℃时,提升RNS 会明显提高脱硝率,但 RNS大于1.5 后,脱硝率增幅放缓;不含氧时,OH 等活性基团很少导致SNCR 反应进行缓慢,含氧时,氧含量增 加会加强NH3氧化减小脱硝率;循环灰含有Fe2O3、CaO 金属氧化物可以起到催化作用,加强NH3的氧化反应从 而降低脱硝率.
Abstract:
In order to meet ultra-low emission standards,a power plant,when preparing a 660,WM supercritical circulating fluidized bed unit,installs a SNCR denitration device in the cyclone separator.The influence of temperature,ammonia nitrogen molar ratio(RNS),oxygen content and circulating ash on SNCR is studied experimentally.It is found that the temperature rises from 800,℃ to 950,℃,the denitrification rate increases and reaches the peak value at 950,℃,when the temperature continues to rise,the denitrification rate decreases due to NH3 oxidation.When the temperature is lower than 850,℃,temperature is the controlling factor of the reaction, and RNS has little influence.When the temperature is more than 850,℃,RNS will significantly improve the denitrification rate,but when RNS is greater than 1.5,the rise of denitrification rate will slow down.Without O2,,there are few OH and other active group and SNCR reaction is slow.When oxygen is in the presence,the increase of oxygen content will increase the NH3 oxidation and decrease the denitrification rate.Circulating ash containing Fe2O3 and CaO can play a catalytic role and enhance the oxidation reaction of NH3 to reduce denitrification rate.

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[1]郑守忠,印建朴,熊源泉,等. 尿素、铵根离子溶液/添加剂的湿法脱硝[J].燃烧科学与技术,2011,(01):17.
 ZHENG Shou-zhong,YIN Jian-pu,XIONG Yuan-quan,et al. Removal of NOx by Solutions of Urea and Ammonium Ion/Additives[J].Journal of Combustion Science and Technology,2011,(04):17.
[2]雷 达,金保升. 基于复相催化反应动力学的电站SCR系统三维数值模型[J].燃烧科学与技术,2010,(03):236.
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[3]杨 梅,张忠孝,于 娟,等.循环流化床烟气SNCR 脱硝机理与实验[J].燃烧科学与技术,2014,(02):101.[doi:10.11715/rskxjs.R201309025]
 Yang Mei,Zhang Zhongxiao,Yu Juan,et al.Denitrification Mechanism Analysis and Experiment of SelectiveNon-Catalytic Reduction of Flue Gas ofCirculating Fluidized Bed[J].Journal of Combustion Science and Technology,2014,(04):101.[doi:10.11715/rskxjs.R201309025]

备注/Memo

备注/Memo:
收稿日期:2016-06-26. 基金项目:国家科技支撑计划资助项目(2015BAA04B02). 作者简介:原奇鑫(1991— ),男,硕士研究生,yuanqx1991@163.com. 通讯作者:孙保民,男,博士,教授,sbm@ncepu.edu.cn.
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