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NOx Reduction in a 130 t/h Biomass-Fired Circulating Fluid Bed Boiler Using Coupled Ozonation and Wet Absorption Technology
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-09-18 , DOI: 10.1021/acs.iecr.9b03355 Jiaming Shao 1 , Chaoqun Xu 1 , Zhihua Wang 1 , Jianping Zhang 2 , Rongtao Wang 2 , Yong He 1 , Kefa Cen 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-09-18 , DOI: 10.1021/acs.iecr.9b03355 Jiaming Shao 1 , Chaoqun Xu 1 , Zhihua Wang 1 , Jianping Zhang 2 , Rongtao Wang 2 , Yong He 1 , Kefa Cen 1
Affiliation
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Low temperature, high alkali metal, and water content flue gas in biomass boilers restrict the application of traditional NOx treatment technology (i.e., selective noncatalytic reduction and selective catalytic reduction). In this paper, the coupled ozonation and wet absorption technology was used in a 130 t/h biomass circulating fluid bed boiler. Key parameters, that is, O3/NO molar ratio, mixing uniformity, liquid/gas ratio, and O3 residual, were investigated with the industrial real case. The higher O3/NO molar ratio achieved better denitration efficiency, and the O3 residual started to increase once the O3/NO molar ratio exceeded 2.1. Mixing uniformity is a key factor for the diffusion of ozone in flue gas, and it would directly influence N2O5 formation and O3 decomposition process. In the slurry, NO3– and SO42– were the major byproducts after NOx and SO2 absorption. With the optimization of key parameters, the NOx emission was controlled below 50 mg/Nm3 under 34.8 kg/h O3 dosage.
中文翻译：
NO X减少130吨/小时生物质直燃循环流化床锅炉使用耦合臭氧和湿吸收技术
低温，高碱金属，并在生物质的锅炉水含量的烟道气限制传统NO的应用X处理技术（即，选择性的非催化还原和选择性催化还原）。在本文中，将臭氧氧化和湿吸收耦合技术用于130 t / h的生物质循环流化床锅炉。结合工业实际情况，研究了关键参数，即O 3 / NO摩尔比，混合均匀性，液/气比和O 3残留量。较高Ô 3 / NO摩尔比取得了较好的脱硝效率，和O 3残留开始增加一旦Ò 3/ NO摩尔比超过2.1。混合均匀性是影响臭氧在烟气中扩散的关键因素，它会直接影响N 2 O 5的形成和O 3的分解过程。在浆料中，NO 3 -和SO 4 2-是主要的副产物NO后X和SO 2的吸收。与关键参数的优化，NO X排放物低于50mg / Nm的受控3下34.8公斤/ H 2 O 3的用量。
更新日期：2019-09-18
中文翻译：
NO X减少130吨/小时生物质直燃循环流化床锅炉使用耦合臭氧和湿吸收技术
低温，高碱金属，并在生物质的锅炉水含量的烟道气限制传统NO的应用X处理技术（即，选择性的非催化还原和选择性催化还原）。在本文中，将臭氧氧化和湿吸收耦合技术用于130 t / h的生物质循环流化床锅炉。结合工业实际情况，研究了关键参数，即O 3 / NO摩尔比，混合均匀性，液/气比和O 3残留量。较高Ô 3 / NO摩尔比取得了较好的脱硝效率，和O 3残留开始增加一旦Ò 3/ NO摩尔比超过2.1。混合均匀性是影响臭氧在烟气中扩散的关键因素，它会直接影响N 2 O 5的形成和O 3的分解过程。在浆料中，NO 3 -和SO 4 2-是主要的副产物NO后X和SO 2的吸收。与关键参数的优化，NO X排放物低于50mg / Nm的受控3下34.8公斤/ H 2 O 3的用量。
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