One of the ultrafiltration devices is a vertical reverse force with the membrane surface, under its function, water is separated from the intercepted molecular structure through the membrane surface. The existence of two types of forces makes it less likely to cause concentration polarization on the surface of the membrane and less likely to produce adsorbed sediment. Therefore, throughout the entire process of ultrafiltration membrane, the decrease in permeability rate is relatively slow, and its operating cycle time increases relatively. However, after a certain operating time of the ultrafiltration membrane, the increase in intercepted material or the gradual thickening of the concentration polarization layer will still significantly reduce the permeability rate.

At this point, the radial water flow rate of the aqueous solution can be increased, the reverse working pressure on the membrane surface can be reduced, and short-term flushing can be carried out to achieve good repair of the permeability rate. This practical operation can flexibly utilize the characteristics of ultrafiltration membranes until such flushing methods are ineffective, and then remove the ultrafiltration membrane for organic chemical flushing. These two flushing methods are called isobaric flushing, which means flushing without pressure difference on both sides of the membrane. The use of backwashing (flushing with pressure difference on both sides of the membrane) in ultrafiltration systems has a stronger actual flushing effect, but the equipment structure is cumbersome and the project investment is large.

专业水处理的疑难问题，产品选型问题，可以单击下面的微信二维码电话联系贺工在线指导，长按微信二维码可自动识别添加贺工微信沟通解决您的疑难问题