① Sieve Filter Filtration medium pore size is less than the diameter of solid particles, relying on the role of sieve solid particles removed from the suspension.
In this case,
Screening and filtration In the early stage of filtration, fine particles flow out, and the filtrate is turbid. As the cake layer is formed and thickened, the filtrate gradually becomes clear. As the sieve gradually blocked, the filtration rate showed a downward trend. Filtration process When the cake layer formation, the role of sieve analysis by the cake layer, filter media loss of sieve analysis, only play a role in supporting the cake layer, said cake layer filter.
In this case,
② Adsorption filtration (deep bed filtration): Filter mesh mesh size is greater than the diameter of solid particles, solid particles into the filter medium pore channel by the media surface adsorption.
In this case,
In actual production, sieve analysis and adsorption at the same time, adsorption filter medium retained larger particles; sieve filter cake layer can adsorb smaller particles.
