固液两相流对管式膜超滤过程强化的研究

发布时间：2018-04-16 15:07

本文选题：固液两相流 + 管式膜　；参考：《水处理技术》2017年12期

【摘要】：采用PVDF管式膜对牛血清蛋白溶液进行错流超滤实验,加入活性炭、陶瓷、PVC等固体粉末形成固液两相流,考察在固液两相流下粉末种类、跨膜压差、膜面流速、料液蛋白浓度及粉末投加量等参数对管式膜超滤过程的影响。实验结果表明,陶瓷粉末因其硬度大,易造成膜面磨损,不适宜作为固相介质。活性炭粉末硬度适宜、廉价易得且较PVC粉末强化效果明显,当牛血清蛋白浓度为100 mg/L时,活性炭粉末(饱和)投加量为2.5 g/L左右效果最佳;跨膜压差越大、料液蛋白浓度越高,固液两相流对超滤过程的强化效果越明显,0.5 MPa时渗透通量可提高84%;增大膜面流速利于提高渗透通量。可见,引入固液两相流能有效减缓浓差极化和膜污染,对管式膜超滤过程强化效果明显,有利于提高膜过滤效率。
[Abstract]:The cross-flow ultrafiltration experiment of bovine serum protein solution was carried out with PVDF tube membrane. Solid liquid two-phase flow was formed by adding solid powder such as activated carbon and ceramic PVDF. The type of powder under solid-liquid two-phase flow, the transmembrane pressure difference, and the flow rate of membrane surface were investigated.The effects of the concentration of protein and the dosage of powder on the ultrafiltration process of tubular membrane.The experimental results show that the ceramic powder is not suitable for solid phase because of its high hardness and easy to cause wear on the film surface.When the concentration of bovine serum protein was 100 mg/L, the dosage of activated carbon powder (saturation) was about 2.5 g / L, and the bigger the pressure difference was, the higher the concentration of protein was.The enhancement effect of solid-liquid two-phase flow on ultrafiltration process is more obvious, the permeation flux can be increased by 84% at 0.5 MPa, and the permeation flux can be increased by increasing the flow rate of membrane surface.It can be seen that the introduction of solid-liquid two-phase flow can effectively reduce the concentration polarization and membrane fouling, strengthen the process of tubular membrane ultrafiltration obviously, and improve the efficiency of membrane filtration.
【作者单位】：河北工业大学;海水资源高效利用化工技术部教育部工程研究中心;兴业皮革科技股份有限公司;泉州师范学院;
【基金】：泉州科技计划项目(2015Z111)
【分类号】：TQ028.8

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