Structure and selection of multi-media filters

The meaning of a filter is that in the water treatment process, filtration generally refers to the process of using filter media layers such as quartz sand and anthracite to intercept suspended impurities in water, thereby clarifying the water. The porous material used for filtration is called filter material, and quartz sand is the most common filter material. There are various types of filter media, including granular, powdery, and fibrous. Common filter media include quartz sand, anthracite, activated carbon, magnetite, garnet, ceramics, plastic balls, etc.The main filter product names of China Strainer Network include:Flange-connection Y Fype Strainer,Hand-Operated Brush Type Strainer,Oxygen Strainer,P Type Automatic Sewage Disposal Strainer,SRB Series Basket Type Strainer

Multi media filter (filter bed), which uses two or more media as the filter layer, is used in industrial circulating water treatment systems to remove impurities, adsorbed oil, etc. in sewage, so that the water quality meets the requirements of recycling. The function of filtration is mainly to remove suspended or colloidal impurities in water, especially to effectively remove small particles and bacteria that cannot be removed by sedimentation technology. BOD5 and COD also have a certain degree of removal effect

Multi media filter compositionA multi-media filter is mainly composed of a filter body, supporting pipelines, and valves.The filter body mainly includes the following components: simplified Chinese; Water distribution components; Supporting components; Backwash the trachea; Filter material; Exhaust valve (external), etc.Selection criteria for filter media(1) Must have sufficient mechanical strength to prevent rapid wear and breakage during backwashing process;(2) Good chemical stability;(3) Does not contain harmful or toxic substances to human health, and does not contain substances that are harmful or affect production;The selection of filter materials should preferably use those with high adsorption capacity, high interception capacity, high water production, and good effluent quality. In the filter material, pebbles mainly play a supporting role. During the filtration process, due to their high strength, stable spacing and large pores, they facilitate the smooth passage of filtered water in the washing process; Similarly, in the backwashing process, backwashing water and backwashing air can pass smoothly.In the conventional configuration, pebbles are divided into four specifications, and the paving method is from bottom to top, with the first being large and the second being small.The relationship between the particle size of the filter material and the filling heightThe ratio of the height of the filter bed to the average particle size of the filter material is 800 to 1000 (design specifications).The particle size of the filter material is related to the filtration accuracy.

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