The Core Principle of Screening and Retention in Membrane Separation Equipment

The screening and retention in membrane separation equipment relies on the microporous structure of the functional membrane layer. Uniformly sized micropores distributed on the membrane surface form the basic barrier for media screening. Different substances have different molecular particle sizes and aggregate masses. Under fluid-driven action, substances smaller than the membrane pores can freely penetrate the membrane layer, while substances larger than the pores are blocked on one side, achieving stratified separation.

This screening process is a physical separation mode, not changing the chemical composition of the medium itself, but relying solely on physical size differences to achieve retention and permeability differentiation. The membrane pores have a fixed screening scale, accurately distinguishing different volumes of solute and solvent in the mixed medium. Large molecular impurities, colloids, and particulate matter in the fluid are intercepted, while small molecular effective components permeate the membrane with the solvent, forming a separate flow state of purified and concentrated liquids.

The uniform pore distribution of the membrane layer maintains a stable screening benchmark throughout the process, preventing screening scale deviations and ensuring a continuous and stable separation process. Relying on a precise microporous sieving mechanism, it achieves fine separation, purification, and concentration of mixed media, achieving a trace component separation effect that conventional filtration equipment cannot achieve.