Multimedia filter

The multi-media filter is a process in which one or several filter media are used. The Yingkou dust removal equipment passes water with higher turbidity through a certain thickness of granular or non-granular materials under a certain pressure, thereby effectively removing suspended impurities and clarifying the water. , Commonly used filter materials are quartz sand, anthracite, manganese sand, etc., which are mainly used for water treatment to remove turbidity, softened water, and pretreatment of pure water. The turbidity of the effluent can reach below 3 degrees.

Multi-media filter (filter bed) is a media filter that uses more than two media as the filter layer. It is used in industrial circulating water treatment systems to remove impurities and adsorb oil 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 tiny particles and bacteria that cannot be removed by precipitation technology. BOD5 and COD also have a certain degree of removal effect.

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 treatment (exchange resin, electrodialysis, reverse osmosis).

2. Multi-media filter is a commonly used pretreatment device for deep water purification. Different filter materials can be added according to process requirements.

3. The material of the multi-media filter can be made of glass fiber reinforced plastic, A3 steel anti-corrosion or rubber lining, all stainless steel. There are two modes of operation: automatic and manual. The automatic control adopts the automatic controller imported from the United States and the control of gas and hydraulic valves. The operation is simple and easy to maintain. It is widely used in the pretreatment devices of water treatment processes in various industries. .

4. The filter material of the multi-media filter (including the double filter material filter) should have sufficient chemical stability, the relative density and particle size of each medium should be different, and the double-layer filter material composed of anthracite and quartz sand should be filtered. The relative density of anthracite used in the filter 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; the three-layer filter is in addition to the above two filter materials. Heavy ore such as manganese sand and magnetite can be used, with a relative density of 4.7-5.0 and a particle size of 0.5-4mm.