An overview of the supply of oral liquid filter principle 

 Outline 
 Filter principle: the role of pressure difference, the suspensions through porous media (filter media), so that solid particles 
 Grain retention in the filter media surface, the formation of filter cake, while the liquid is filtered out to achieve the purpose of solid-liquid separation. 
 The driving force of filtration and separation for the filter media on both sides of the pressure difference (pressure difference). 
 Filter mode: 
 (1) Constant Pressure Filtration: Keep the filtration pressure constant filtration rate with the filter cake thickening and less diffuse. 
 (2) constant speed filter: to keep the filtration rate was unchanged, feeding pumps and dosing, feeding pressure rising. 
 Swing speed filtering: in the entire filter, pressure, and rate changes. 
 (4) after the first constant voltage constant speed: the cake thin, low pressure, maintain a constant rate; cake thickness and pressure 
 Increased, reaching a specified pressure, constant pressure filtration. 
 (2). Filter media 
 Used to block the material of the solid particles, called the filter media. 
 Category: 
 (A) of the action principle: 
 (1) the surface of filter media: the solid particles are retained in the media surface to form a filter cake. 
 Such as: filter paper, filter cloth, filter, blankets and so on. 
 ⑵ deep filter media: the solid particles are retained within the media. 
 Such as: sand filtration layer, filter coatings, filter, porous metal, porous plastics, ceramics, 
 Molecular sieves. 
 (B) by the structure: 
 Non-metallic type: cotton, wool, silk, asbestos, paper, carpet, woven materials. 
 ⑴ flexible filter media metal: steel wire, steel mesh and so on. 
 Metal and nonmetal mixed braid. 

 Filter bodies 
 Filtration institutions filter plate, filter box, cloth, squeeze the diaphragm composed of coated filter plates on both sides of the cloth must be configured to squeeze the diaphragm, a set of filter plate by the diaphragm plate and sides. The substrate on both sides of the diaphragm plate covered with rubber diaphragm, the diaphragm outside covered with cloth, side ordinary filter plate. Material from the thrust panel material hole into the filter chamber, solid particles because the particle size larger than the aperture of the filter media (cloth) are retained in the filter chamber, the filtrate from the filter plate below the outflow of fluid holes. Addition to membrane squeeze-cake need to drain can also use compressed air or steam, from washing the mouth pass into the cake moisture, air rushed in order to reduce the moisture content of the cake. 


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