生物法烟气脱硝工艺研究进展  

Research advances of bioprocesses for NOx removal from flue gas:a critical review

作　　者：徐梦蝶 王建芳[1,2,3] 葛璟麟 薛瑢 陈佳琦 XU Mengdie;WANG Jianfang;GE Jinglin;XUE Rong;CHEN Jiaqi(School of Environmental Science and Engineering,Suzhou University of Science and Technology;College of Tianping,Suzhou University of Science and Technology;National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology)

机构地区：[1]苏州科技大学环境科学与工程学院 [2]苏州科技大学天平学院 [3]城市生活污水资源化利用技术国家地方联合工程实验室

出　　处：《环境工程技术学报》2022年第6期2049-2056,共8页Journal of Environmental Engineering Technology

基　　金：国家自然科学基金项目(51878430);江苏省高校优势学科建设工程项目。

摘　　要：氮氧化物(NO_(x))作为PM_(2.5)和O_(3)的前驱物,是重要的大气污染控制指标。选择性催化还原(SCR)、选择性非催化还原(SNCR)等是目前燃煤工业锅炉烟气脱硝的主流技术,但存在投资成本高、运行条件苛刻等问题,在中小型烟气脱硝工程应用中受到限制。生物法烟气脱硝技术因其高效、低耗、可持续特征在中小规模烟气脱硝中得到青睐,近年来许多学者对其开展了较广泛的研究。综述了生物法烟气脱硝技术的研究进展,概述相关工艺的脱硝原理及技术特征。论述了化学吸收-生物降解法(BioDeNO_(x))的最新研究方向,重点阐述了络合吸收-生物还原(CABR)反应器的运行原理、还原机制、反应器开发、运行参数和影响因素等,讨论了CABR体系存在的问题及解决措施,并对生物法烟气脱硝技术今后的研究方向进行了展望。Nitrogen oxides(NO_(x)),the precursors of PM_(2.5) and O_(3),are important air pollution control indices.Selective catalytic reduction(SCR)and selective non-catalytic reduction(SNCR)are mature technologies for NO_(x) removal from coal-fired industrial boiler flue gas.However,the application of the two technologies in small-and-medium denitrification engineering is limited because of their high investment costs,harsh operating conditions and other factors.In recent years,biological denitrification technologies have been used increasingly in small-and-medium flue-gas denitration projects.Many scholars have carried out extensive research on them.The advances of bioprocesses for NO_(x) removal from flue gas were critically reviewed,and the denitrification principles and technical characteristics of related processes were summarized.The latest research directions of chemical absorption-biological denitrification(BioDeNO_(x))were reviewed,and the operational principles,reduction mechanism,reactor developments,operational parameters and influencing factors of complexation absorption-biological reduction(CABR)were emphatically elucidated.The obstacles of the CABR system and its solutions were systematically discussed,and the future trends of bioprocesses for NO_(x) removal were prospected.

关 键 词：氮氧化物 BioDeNOx 化学吸收 生物过程 Fe(Ⅱ)EDTA 烟气脱硝 

分 类 号：X703[环境科学与工程—环境工程]