The multi-media filter is a typical multi-media filter with layered anthracite, sand, fine garnet or other materials as the bed.

設備是壓力式的，其原理是當原水自上而下通過濾料時，水中懸浮物由於吸附和機械阻流作用被濾層表麵截留下來；當水流進濾層中間時，由於濾料層中的砂粒排列的更緊密，使水中微粒有更多的機會與砂粒碰撞，於是水中凝絮物、懸浮物和砂粒表麵相互粘附，水中雜質截留在濾料層中，從而得到澄清的水質。經過濾後的出水懸浮物可在5毫克/升以下。

The equipment is pressure type, and its principle is that when the raw water passes through the filter material from top to bottom, the suspended solids in the water are intercepted by the surface of the filter layer due to adsorption and mechanical blocking; When the water flows into the middle of the filter layer, because the sand particles in the filter material layer are arranged more closely, the particles in the water have more opportunities to collide with the sand particles, so the flocs, suspended solids and sand surfaces in the water adhere to each other, and the impurities in the water are intercepted in the filter material layer, so as to obtain clear water quality. The suspended solids in the filtered effluent can be less than 5 mg / L.

1、多孔介質過濾器廣泛用於水處理的工藝中，可以單獨使用，但多數是作為水質深度處理的預過濾。

1. Porous media filters are widely used in water treatment processes and can be used alone, but most of them are used as pre filtration for advanced water quality treatment.

2、多介質過濾器是常用的水質深度淨化的預處理裝置，可根據工藝要求填加不同的濾料。

2. Multi media filter is a common pretreatment device for deep purification of water quality. Different filter materials can be added according to the process requirements.

3、多介質過濾器材質可采用玻璃鋼、A3鋼防腐或襯膠、全不鏽鋼。操作方式有全自動和手動兩種形式，自動控製是采用美國進口的自動控製器及氣、液動閥控製，操作簡便易於維護保養，在各行各業水處理工藝的前處理裝置得到廣泛的應用。

3. The material of multi-media filter can be FRP, A3 steel anti-corrosion or rubber lining, all stainless steel. The operation modes are fully automatic and manual. The automatic control adopts the automatic controller and pneumatic and hydraulic valve control imported from the United States. It is easy to operate and easy to maintain. It is widely used in the pretreatment devices of water treatment processes in all walks of life.

4、多介質過濾器的過濾材料應有足夠的化學穩定性，各介質的相對密度和粒徑應有一定差別，由無煙煤與石英砂組成的雙層濾料過濾器所用的無煙煤相對密度為1.4—1.6，粒徑為0.8—1.8mm，石英砂相對密度為2.6—2.65，粒徑為0.5—1.2mm;3層濾料過濾器除了以上兩種濾料外還可以用錳砂、磁鐵礦之類的重質礦石，其相對密度為4.7—5.0，粒徑為0.5—4mm。

4. The filter material of the multi-media filter shall have sufficient chemical stability, and the relative density and particle size of each medium shall be different. The relative density of anthracite used in the double-layer filter composed of anthracite and quartz sand is 1.4-1.6, the particle size is 0.8-1.8mm, the relative density of quartz sand is 2.6-2.65, and the particle size is 0.5-1.2mm; In addition to the above two filter materials, the three-layer filter can also use heavy ores such as manganese sand and magnetite, with a relative density of 4.7-5.0 and a particle size of 0.5-4mm.