核燃料后处理厂NOx吸收过程研究  

Research on the absorption process of NOx in nuclear fuel reprocessing plants

作　　者：徐琰 刘昱祺 武毓勇 范更新 李小萌 XU Yan;LIU Yuqi;WU Yuyong;FAN Gengxin;LI Xiaomeng(China Nuclear Power Engineering Co.,Ltd.,Beijing 100840,China)

机构地区：[1]中国核电工程有限公司,北京100840

出　　处：《武汉大学学报(工学版)》2024年第S2期272-274,共3页Engineering Journal of Wuhan University

摘　　要：核燃料后处理厂在废液处理过程中会产生大量含高浓度氮氧化物的尾气,为提高后处理厂的经济性及满足气态流出物环境排放要求,设置酸回收系统回收尾气中的氮氧化物,生产硝酸产品回收利用。酸回收系统采用常压(微负压)吸收和精馏工艺,吸收过程涉及多个反应较为复杂。对氮氧化物的常压(微负压)吸收过程进行研究,通过理论计算与试验验证结合的方式,得到单板吸收效率在77.56%~82.21%范围内(吸收剂硝酸浓度在7.14wt%~23.34wt%范围内),满足工程设计需求。In the liquid waste treatment process of nuclear fuel reprocessing plant,a large number of highly concentrated nitrogen oxide waste gas is generated.In order to improve the economy of nuclear fuel reprocessing plant and achieve standard discharge of gaseous effluent,an acid recovery system is set up to recover the nitrogen oxide in the waste gas,and produce nitric acid products for recycling.The acid recovery system adopts atmospheric(micro-negative pressure)absorption and rectification process.The absorption process is complicated,with multiple reactions.A study is made of atmospheric(micro-negative pressure)absorption of nitrogen oxide.By combining theoretical calculation and experimental verification,the absorption efficiency of the single plate is found to be in the range of 77.56%to 82.21%(the concentration of the absorbent nitric acid is in the range of 7.14wt%to 23.34wt%),which meets the requirements of engineering design.

关 键 词：氮氧化物 常压吸收 酸回收 吸收效率 

分 类 号：TL48[核科学技术—核技术及应用]