扩散渗析法回收钢铁酸洗废液中盐酸  

Hydrochloric Acid Recovery from Steel Pickling Waste Acid by Diffusion Dialysis

作　　者：周越 陈乾 葛亮 徐铜文[1] ZHOU Yue;CHEN Qian;GE Liang;XU Tongwen(Institude of Advance Technology,University of Science and Technology of China,Hefei 230031,China;School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学技术大学先进技术研究院,合肥230031 [2]中国科学技术大学化学与材料科学学院,合肥230026

出　　处：《离子交换与吸附》2023年第5期409-418,共10页Ion Exchange and Adsorption

基　　金：国家重点研发计划项目(No.2022YFB3805100);国家自然科学基金(No.22222812)。

摘　　要：在钢铁铸造行业的表面酸洗工艺中,会产生含有大量亚铁离子的高浓度废盐酸。扩散渗析法作为一种低能耗、处理效率高的分离方法,可用于废酸的资源化分离和回收。本文考察了料液流量、流量比、初始酸浓度和初始亚铁离子浓度对酸回收性能的影响。结果表明,当初始酸浓度为3mol/L,初始亚铁离子浓度为2mol/L时,料液流量为3mL/min,流量比为1:1时为最佳条件,酸回收率为81.31%,亚铁离子截留率为95.27%。综上,基于阴离子交换膜的扩散渗析过程对钢铁酸洗废液的酸回收应用表现出良好的酸回收效果,具有广阔的应用前景。In the iron and steel casting industry,a significant amount of waste hydrochloric acid with a high concentration of ferrous ions is generated during the surface pickling process.Diffusion dialysis is a highly eficient and low energy consumption method that can be employed for the recovery and separation of this waste acid.This study aimed to investigate the impact of various factors,including the flow rate of the feed solution,flow rate ratio,initial acid concentration of the feed solution,and initial concentration of ferrous ions in the feed solution,on the performance of acid recovery.The results indicated that the optimal conditions for acid recovery were achieved when the initial acid concentration was 3mol/L and the initial ferrous ions concentration was 2mol/L,with a feed flow rate of 3mL/min and a flow rate ratio of 1:1.Under these conditions,the acid recovery was found to be 81.31%,and the rejection of ferrous ions was 95.27%.Overall,the diffusion dialysis process utilizing an anion exchange membrane demonstrated excellent acid recovery performance,making it a promising method for recycling acid from waste acid in the iron and steel casting industry.

关 键 词：酸洗废液 阴离子交换膜 扩散渗析 酸回收 

分 类 号：X703[环境科学与工程—环境工程]