Author：Huamo Water treatment materials FROM：Water filter membrane manufacturer TIME：2021-12-02
Correctly grasping and implementing the main parameters of actual operation is the key to long-term stable operation of uf filter membrane. The main parameters of actual operation generally include: flow rate, pressure, pressure drop, concentrated water consumption, recovery ratio and temperature.
The flow rate refers to the flow angular velocity of the raw water on the membrane surface, and is the key practical operating parameter of uf membrane module in the ultrafiltration system. When the flow rate is large, it will not only cause kinetic energy consumption and excessive pressure, but also accelerate the decline of the collapse characteristics of uf membrane module. On the contrary, if the flow rate is small, the thickness of the additional surface layer produced by the interceptor on the surface of the membrane will expand, leading to the polarization of the concentration value, which will not only damage the water permeability, but also damage the water permeability.
The water permeability of the ultrafiltration membrane increases with the increase of temperature. Generally, the viscosity of the solution decreases with the temperature, thereby reducing the frictional resistance of fluidity and correspondingly increasing the water permeability. The specific temperature of the on-site liquid supply should be considered in the design of the construction project. Especially in seasonal changes, temperature adjustment should be considered when the temperature is too low, otherwise the permeability coefficient may change by about 50% with temperature changes. In addition, excessively high temperatures can also compromise the characteristics of the film. Generally speaking, the working temperature of the ultrafiltration membrane 3 should be 25±5°C, and the heat-resistant membrane raw materials and shell raw materials can be used for work at higher temperatures.