A filter media classification
First of all, a wide range of industrial filter media, according to their structure is divided into flexible media, rigid media and loose.
So we say that any fluid can pass through the filter, the solid particles contained therein are intercepted, in order to achieve the purpose of solid-liquid separation of porous materials are collectively referred to as filter media, filter cloth is one of them. It is a key component of the filter press, which determines the separation accuracy and efficiency of the filtration operation, but also directly affects the production strength and power consumption of the filter.
Media three categories:
<< Flexible Filtration Media: Metal Filtration Media Non-Metallic Filtration Media: Cotton, Woven, Silk, Synthetic Fibers (Polyester, Polypropylene, etc.), Fiberglass Fabrics, Nonwoven Fabrics: Nonwoven Cloth (filter paper, filter mat, filter pad) Metal, non-metallic mixed media
<< Rigid filter media: sintered metal mesh, metal fiber sintered felt, sintered powder material, porous ceramic, sintered porous plastic, sintered aluminum oxide, glass filter media
<< loose filter media diatomaceous earth, expanded perlite powder, cellulose, sand, charcoal powder, smokeless
The principle of the filter media is related to the filtration operating mechanism. The technical characteristics of the filter media used for filter cake filtration must meet the special requirements of such filtration: the structure of the media ensures that particles begin to "bridge" the surface of the media quickly when filtration is started, and the fine particles are not lost (ie, filtered) The medium has a low rate of pinch particles in the cell walls and minimal media blockage; the filter cake can be easily and completely removed; and the media structure facilitates cleaning and regeneration. Commonly used filter cake filter media are mainly filter cloth, filter paper, filter, filter and so on, for the depth of the media used for filtration, the structure required to meet the specified retention accuracy, can block the required blocking particles; bed to There is enough capacity to slow the process of getting clogged with particles to extend the operating cycle.
The common requirements for various filter media are: excellent filtration characteristics (small specific resistance, higher rejection, etc .; good physical and mechanical properties (high strength, creep, rigid flexible, high wear resistance), in a certain process Operating conditions and the environment, good chemical stability (corrosion-resistant, high temperature and microorganisms, etc.), cleaning, regeneration, cheap, reliable sources. So, in summary, the market price of cloth is also promising!
(Addtime：2017-12-29)
