Reconstruction of Pollutant Gel and Analysis of Its Heat and Mass Transfer and Pollution Characteristics
Gel fouling is a key problem in membrane desalination.In this study,gel contaminants generated under the actual operating conditions of seawater desalination were reconstructed by a chemical crosslinking method,and the various physical and chemical properties of the gel were tested and characterized.The reconstruction not only solves the disadvantage of requiring long operation in real seawater experiments,but also optimizes the problem that the real characteristics of gel contamination cannot be effectively explained in experiments with simple synthetic seawater.The results show that the mass transfer resistance of the water-producing system was not only caused by the dense structure of gel,but also the decrease of the temperature difference on both sides of the membrane caused by the low heat conduction of the gel layer.The gel contaminant exhibited hydrophilic and viscoelastic properties,which confer strong tensile strength,compressive stress,and anti-scouring ability.The characteristics of gel make it easy to adhere to the membrane surface.The model constructed by coarse-grained simulation can reflect some real parameters of gel and could be used for subsequent calculation.
contaminant gelreconstructionheat and mass transferviscoelasticdissipative par-ticle dynamics(DPD)simulation
万方数据
维普
