含氯化钠稀盐酸蒸馏浓缩工艺优化及应用研究  

Process Optimization and Application Study of Distillation Concentration for Sodium Chloride Containing Dilute Hydrochloric Acid

作　　者：王晓光 Wang Xiaoguang(WTE Management Co.,Ltd.,Shanghai Environment Group,Shanghai,601200)

机构地区：[1]上海环境集团再生能源运营管理有限公司,上海601200

出　　处：《当代化工研究》2024年第24期185-187,共3页Modern Chemical Research

摘　　要：针对含氯化钠稀盐酸的处理与资源化利用问题,提出了通过蒸馏技术浓缩氯化氢的方法,并对其工艺条件进行优化研究。实验采用蒸馏法,分别考察了蒸馏温度、氯化钠质量分数及蒸馏时间对稀盐酸浓缩效果的影响。在蒸馏温度方面,结果表明:随着温度从100℃升至130℃,盐酸质量分数显著增加,其中120℃~130℃区间浓缩效率最佳;在氯化钠质量分数方面,溶液中NaCl含量的升高会显著抑制盐酸浓缩效率,NaCl质量分数由0%增加至15%时,盐酸质量分数下降了约30%;在蒸馏时间方面,浓缩过程表现出非线性特征,分为初期缓慢阶段和后期快速提升阶段,延长蒸馏时间至3.5h可实现最佳浓缩效果,盐酸质量分数达到16.79%。此外,对现场采集的废盐酸浓缩进行了验证,在优化条件下同样具有良好的稀盐酸浓缩效果,为工业废酸的绿色处理提供了重要参考。This study addresses the treatment and resource utilization of dilute hydrochloric acid containing sodium chloride,proposing a method to concentrate hydrogen chloride through distillation technology and optimizing its process conditions.The distillation method was employed to investigate the effects of distillation temperature,sodium chloride mass fraction,and distillation time on the concentration efficiency of dilute hydrochloric acid.For distillation temperature,results showed that as the temperature increased from 100℃ to 130℃,the mass fraction of hydrochloric acid significantly increased,with the highest concentration efficiency observed in the range of 120℃ to 130℃.Regarding the sodium chloride mass fraction,an increase in NaCl content in the solution markedly inhibited the concentration efficiency.When the NaCl mass fraction increased from 0%to 15%,the hydrochloric acid mass fraction decreased by approximately 30%.As for distillation time,the concentration process exhibited a nonlinear trend,consisting of an initial slow phase followed by a rapid increase phase.Extending the distillation time to 3.5 hours achieved the best concentration effect,with the hydrochloric acid mass fraction reaching 16.79%.Additionally,validation was conducted using waste hydrochloric acid collected on-site.Under optimized conditions,the method also demonstrated effective concentration of dilute hydrochloric acid,providing valuable insights for the green treatment of industrial waste acid.

关 键 词：废盐酸 氯化钠 蒸馏法 资源回收 

分 类 号：X7[环境科学与工程—环境工程]