| 富氧燃烧锅炉烟气CO2捕集中回收NO的研究 |
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| 引用本文： | 阎维平,鲁晓宇. 富氧燃烧锅炉烟气CO2捕集中回收NO的研究[J]. 动力工程, 2011, 31(4) |
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| 作者姓名： | 阎维平 鲁晓宇 |
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| 作者单位： | 华北电力大学能源动力与机械工程学院,教育部电站设备状态监测与控制重点实验室,保定071003 |
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| 基金项目： | 国家高技术研究发展863计划专项经费资助项目(2009AA05Z310) |
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| 摘 要： | 在富氧燃烧锅炉烟气CO2捕集的基础上,提出了一种利用CO2捕集时加压降温的特殊工艺流程资源化回收NO的新方法.分析了富氧燃烧锅炉烟气CO2的捕集流程,证明高压低温的工况条件十分有利于NO加速氧化为NO2及NO2液相吸收转化为稀硝酸产品.基于化学反应动力学基本原理与实验数据,对吸收过程发生的化学反应进行分析与计算,结果表明:在压力为3 MPa、温度为30℃时,NO的氧化转化率可达90%,反应时间仅需8.06 s,水吸收不构成控制环节,无需其他化学药剂.按300MW富氧燃煤锅炉的烟气量及NO和O2的质量浓度范围计算,富氧燃烧发电机组在捕集高浓度CO2的同时,每小时可回收浓度为20%的稀硝酸1974 kg,折合纯质硝酸395kg,一天能产生约4.7万元的产值.
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| 关 键 词： | 富氧燃烧 CO2捕集 NO回收 反应动力学 |
NO Recovery During CO_2 Capture from Flue Gas of an Oxygen-enriched Coal-fired Boiler |
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| YAN Wei-ping , LU Xiao-yu. NO Recovery During CO_2 Capture from Flue Gas of an Oxygen-enriched Coal-fired Boiler[J]. Power Engineering, 2011, 31(4) |
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| Authors: | YAN Wei-ping LU Xiao-yu |
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| Affiliation: | YAN Wei-ping,LU Xiao-yu(MOE's Key Lab of Condition Monitoring and Control for Power Plant Equipment,School of Energy,Power and Mechanical Engineering,North China Electric Power University,Baoding 071003,China) |
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| Abstract: | Based on CO_2 capture from flue gas of oxygen-enriched coal-fired boilers,a new method for NO recovery is proposed using the pressurizing and cooling technologies originally adopted for CO_2 capture.Analysis on the CO_2 capture process proves the high-pressure low-temperature condition to be favorable for accelerating the oxidation of NO to NO_2,during which the latter one is then absorbed by water to form dilute nitric acid.Analytical calculations have been performed to the absorption process based on basi... |
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| Keywords: | oxygen-enriched combustion CO_2 capture NO recovery reaction kinetics |
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