Ħidma prinċipju ta ' filtru (2)

Il- likwidu tgħaddi through the filter residue layer and filter medium must overcome resistance, so there must be a pressure difference on both sides the filter medium, li is-sewqan force for achieveing filtrazzjoni. Increasing the pressure differences can accelerat filtrazzjoni, but particles that deform under pressure are prone to clogging the pores of the filtering medium at large pressure differences, resulting in slower Filtrazzjoni.
Hemm tliet metodi għal sospensjoni filtrazzjoni: gagazza saff filtrazzjoni, fond filtrazzjoni, u għarbiel filtrazzjoni.
① Filter residue layer filtrazzjoni: In the initial stage of filtrazzjoni, the filtrazzjoni the filtering medium can only retain large solid particles, filwaqt li żgħar partiċelli pass through the filtrazzjoni medium with the filtrate. After the formation of the filteration of the initial filter residue layer, the filter residue layer plays a major role in filtrazzjoni, fejn it-tnejn kbar u żgħar partiċelli huma interċettati, tali bħal in il-filtrazzjoni tal-pjanċa u qafas Iffiltra Preses.
② Deep filtrazzjoni: The filtering medium is thick, the suspension contains less solid particles, and the particles are smaller than the pores of the filtering medium. When filtering, particles are adsorbit in the pores after entering, such as in porous plastic pipe filters and sand filtri.
③ Għarbiel filtrazzjoni: The solid partiċelli interċettat by filtrazzjoni huma akbar minn il-pori tal-filtrazzjoni tali il filtrazzjoni medju, u il solidu partiċelli huma mhux adsorbit ġewwa il filtrazzjoni medju. Pereżempju, the rotary drum filter filter screen filtri filtri out coarse impuritajiet in drenaġġ. In the actual filtrazzjoni process, the three methods often appear simultaneously or sequentially.