Towards Ideal NO Control Technology Using a Plasma-Chemical Hybrid Process
Towards Ideal NO Control Technology Using a Plasma-Chemical Hybrid Process
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使用等离子体化学混合工艺实现理想的 NO 控制技术
DOI：
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发表时间：
2001
期刊：
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通讯作者：
K. Kitaura
中科院分区：
文献类型：
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作者：
Toshiaki Yamamoto;M. Okubo;K. Hayakawa;K. Kitaura
与传统的选择性催化还原（SCR）系统和其他技术相比，所开发的等离子体-化学混合工艺在去除烟气排放中的NO方面非常有效和经济。通过一系列的实验对反应副产物NO、CO、HNO、HNO和NO进行了量化，并对NO的去除率进行了评价。以普通铁电填充床等离子体反应器和隔板填充床等离子体反应器为研究对象，研究了最佳等离子体反应器及其运行特性，考察了反应副产物和脱硝效率。在不降低NO浓度（即反应副产物最少）的情况下，以最少的功率消耗将NO氧化为NO是优化反应器运行条件的关键。通过Na - SO洗涤，生成的NO完全转化为N和Na - SO。采用直径为1.5 mm的电极和直径为3 mm的BaTiO球团的隔板式填充床等离子体反应器与常规填充床反应器相比，在不产生副产物的情况下具有更好的NO氧化效果。采用阻隔式填充床等离子体反应器，再采用化学反应器，运行成本极低（不到SCR工艺的1/6），在NO和CO浓度分别低于6 ppm和5 ppm的情况下，NO去除率接近100%。
The plasma-chemical hybrid process developed was extremely effective and economical in comparison with the conventional selective catalytic reduction (SCR) system and other technologies for NO removal from flue gas emissions. A series of experiments was performed to quantify all the reaction by-prod- ucts such as N O, CO, HNO , HNO , and NO and to evaluate NO removal efficiency. The optimum plasma reactor and its operating characteristics were investigated with regard to reaction by-products and NO removal efficiency using the ordinary ferroelectric packed-bed plasma reactor and the barrier-type packed-bed plasma reactor. The oxidation from NO to NO without decreasing NO concentration (i.e., minimum reaction by-products) and with least power consumption is the key for the optimum reactor operating condition. The produced NO was totally converted to N and Na SO with Na SO scrubbing. The barrier-type packed-bed plasma reactor having 1.5-mm-diameter electrode and 3-mm-diameter BaTiO pellets showed the superior NO oxidation without producing the by-products over the conven- tional packed-bed reactor. The barrier-type packed-bed plasma reactor followed by the chemical reactor showed extremely low operating costs (less than 1/6 of the SCR process) and achieved nearly 100% NO removal with less than 6 ppm of N O and 5 ppm of CO.