The Mathematical Simulation Of The Filter Type Distributed In UF Process

Membrane separation technology is a new efficient technology. It has many advantages, such as low costs of operation and management, high separate efficiency, relatively low energy consumption, simple and no secondary pollution, the temperature in the vicinity of room temperature. UF technology has entered into the practical stage of industrialization from the 20 century 90's and was wildly used in the biochemical field, food and so on. But the problems of the membrane fouling and concentration polarization leaded to severely low water flux and impeded the universal application of UF membrane. Therefore, such issues have become the focus which the experts and scholars concern.In the past study of UF, the description of UF fouling theory was always established on tubal membrane or plate membrane. Based on the theories which are Wang Jin's Model of UF dynamic membrane, Mathematical models of blocking filtration laws and Shi ZaiFeng's Mathematical simulation of the cross-flow filtration process, this paper established the models of blocking types distributing in UF process. Paper liquid was diluted to be used as raw water to simulated surface water or second effluent. This paper mainly researched on different pressure, different anti-wash conditions, different quick-wash conditions and raw water quality in constant pressure filtration process and flux, anti-wash condition in constant flux filtration process. Meantime, the model was amended and certificated. The main research results are as follow:(1)Based on blocking filtration laws, a mathematical model about filtration process of blocking types distributed was established. (2) The model detailed analyzed the distribution of the blocking types in filtration process. And compared simulation data the results of the comparison are very close.(3) Analyzed different pressure, different anti-wash conditions, different quick-wash conditions and raw water quality in constant pressure filtration process and compared simulation data the results of the comparison are very close.(4) Analyzed and flux, anti-wash condition in constant flux filtration process, i compared simulation data the results of the comparison are very close.(5) this paper studied the relationship between the model valueβorαand constant membrane area and unit volume of the accumulated water of the relationship betweenq,Values ofαandβwas amended and the correct value into the model, the experiment data and model fit the data very well with the extent that this shows the model revised in line with the actual, practical and relatively strong.