柴油机尾气Fe(Ⅱ)EDTA络合-铁屑还原脱硝中试研究  

Pilot-scale study on removal of NO from diesel exhaust with Fe(Ⅱ) EDTA complexation combined with iron filings reduction

作　　者：张国孟 石瑞 邓军 许文晋 张光旭 王逸 夏亮 ZHANG Guomeng;SHI Rui;DENG Jun;XU Wenjin;ZHANG Guangxu;WANG Yi;XIA Liang(Shanghai Hengyuan Marine Equipment Co.Ltd.,Shanghai 201709,China;School of Chemistry,Chemical Engineering and Life Sciences,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]上海亨远船舶设备有限公司,上海201709 [2]武汉理工大学化学化工与生命科学学院,武汉430070

出　　处：《环境工程学报》2018年第8期2258-2263,共6页Chinese Journal of Environmental Engineering

基　　金：工业和信息化部高技术船舶科研计划重大工程与专项(CDGC01-KT16)

摘　　要：采用Fe(Ⅱ)EDTA络合-铁屑还原脱硝工艺,针对功率175 k W的柴油机,搭建了处理量为640 m^3·h^(-1)的脱硫脱硝中试装置,系统研究了脱硝装置连续脱除柴油机尾气中NO的过程。结果表明:铁屑还原效果较好,连续运行时,Fe(Ⅱ)EDTA溶液对NO有很好的吸收效果;喷淋量、填料层高度及再生温度均会影响络合剂吸收NO的脱除效率,但功率的改变对络合剂吸收NO的脱除效率影响较小。长时间连续运行实验表明,系统的脱硝性能稳定,稳定运行时的脱硝效率连续7 d均保持在75%左右;系统运行过程中,络合液的pH逐渐上升,最终稳定在7.45左右。With the successful construction of desulfurization denitration pilot plant（640 m^3·h^-1） for the 175 k W diesel engine, the process of continuous removal of NO from diesel exhaust with the method of complexation with Fe（Ⅱ）EDTA and reduction with iron filings was systematically investigated. Results showed that iron filings was a desirable reductant and the Fe（Ⅱ）EDTA solution had highly continuous removal efficiency of NO in the exhaust gas.The spray rates, packing height and regeneration temperature all affected the removal efficiency of NO. There was no obvious change of removal efficiency with the studied working condition. In addition, the long-time continuous operation showed that the denitrification efficiency could maintain 75% for 7 days, demonstrating a desirable stability. In the continuous operation process, the complexing agent pH gradually increased and finally stabilized at pH=7.45.

关 键 词：柴油机尾气 Fe(Ⅱ)EDTA NO 铁屑还原 中试实验 

分 类 号：X701[环境科学与工程—环境工程]