Abstract: Separation of synthetic titanium white waste liquor（H₂SO₄/FeSO₄ system）by a self-made spiral wound diffusion dialysis module has been studied. Effects of H₂SO₄ and FeSO₄ concentration，diffusion dialysis time，flow rate and flow rate ratio on the recovery of H₂SO₄ were investigated. The results showed that the spiral wound diffusion dialysis membrane module was an effective diffusion dialyzator. The acid recovery rate was more than 80% and the salt rejection rate was more than 90% when feed and water flow rate is 4.84 mL/(min?m²) and flow ratio of water to feed is 1. The recovered acid concentration was up to 70% of the acid concentration of titanium white waste liquor. Under the same operation condition，the spiral wound diffusion dialysis membrane module was more effective than the conventional plate-and-frame diffusion dialyzator.

Key words: diffusion dialysis, spiral wound membrane module, titanium white waste acid, acid recovery

摘要： 自制的卷式扩散渗析膜组件用于模拟钛白废酸液（H₂SO₄/FeSO₄体系）的回收处理，考察了废液中酸和盐的浓度、流速、流速比、时间等因素对酸回收率和铁离子截留率的影响。结果表明，卷式扩散渗析膜组件是回收钛白废酸液的有效设备，处理能力为4.84 mL/(min?m²)、流速比为1时，酸的回收率可以达到80%，Fe的截留率控制在90%以上，回收酸浓度可达原酸浓度的70%，相同处理效果下，其处理量大于小型板框式扩散渗析器。

关键词: 扩散渗析, 卷式膜组件, 钛白废酸, 酸回收