Experimental study on influence of pulse injection on membrane structure change and filtration characteristics of membrane filter materials
Xu Zhouhua1, Shen Henggen1, Yang Xuebin1, Yang Chun2, Luo Binyi2, Zhao Shoubin2
In order to solve the problem that the change of membrane pore size affects the filtration efficiency in the process of use, the breaking strength and filtration efficiency before and after injection of five kinds of filter materials with the same membrane covering are tested, and the membrane surface is observed by scanning electron microscope. The results show that the breaking strength of inorganic fiber membrane filter material is significantly greater than that of the organic polymer fiber membrane filter material, and its resistance to deformation of injection pressure during pulse injection is better, which can reduce the decrease of filtration efficiency. The inorganic fiber membrane filter material has higher initial filtration efficiency and the lowest decrease degree of filtration efficiency after multiple injections, and its filtration efficiency retention is better when it is used for a long time.