In the ultrafiltration process of ptfe ultrafiltration membrane, the aqueous solution flows through the membrane surface under pressure, and the solvent (water) and small molecule solutes that are smaller than the membrane pores permeate the membrane and become the purification liquid (filtrate), which is larger than the membrane pores. Solutes and solute groups with large pores are trapped and discharged with the water flow to become concentrated liquid.
The ultrafiltration process is dynamic filtration, and separation is completed under flow conditions.
The solute is only deposited to a limited extent on the membrane surface, and the ultrafiltration rate attenuates to a certain extent and tends to equilibrium, and can be restored through cleaning.
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