针对酸液中盐酸的脱除与回收,提出以中空纤维疏水微孔膜为核心环节的膜脱气工艺,并考察了脱气组件的膜面积、原液流速、原液中盐酸浓度等因素对HCl脱除效率的影响.研究结果表明:该工艺可行,随着膜面积的增大、原液流速的升高,HCl的脱除率均有所上升;随着原液盐酸浓度的降低HCl的脱除率下降.在膜面积为1.0 m^2,流速为0.12 m/min,真空度为0.090 MPa的条件下,从浓度为6mol/L的盐酸溶液中脱除HCl,其脱除率最高可达85%.
Experiments study was carried out using the membrane degassing technology for HCl separation from hydrochloric acid solution.The effects of membrane area,the velocity of feed flow through the fiber lumen,and hydrochloric acid concentration on HCl removal efficiency were investigated,respectively.The results showed that HCl separation efficiency can be enhanced by increasing the membrane area and the feed velocity.Furthermore,lower hydrochloric acid concentration led to declined separation efficiency.Using the module with membrane area of 1.0 m^2,the separation efficiency of HCl from 6 mol/L hydrochloric acid solution achieved 85%,at a feed velocity of 0.12m/min and a vacuum pressure of 0.090 MPa.