Porous media filters are widely used in the process of water treatment, which can be used alone, but most of them are prefiltration for water quality depth treatment (exchange resin, electrodialysis, reverse osmosis).
2. Multi-media filter is a pretreatment device for deep purification of water quality, which can be filled with different filter materials according to the process requirements.
3. The material of multi-media filter can be made of fiberglass steel, A3 steel anticorrosive or adhesive, all stainless steel.
Operating mode is fully automatic and manual two kinds of forms, automatic control is to use the imported automatic controller and gas, hydraulic control valve, operation simple and easy to maintenance, water treatment technology in all walks of life of the former treatment plant has been widely used.
4, many media filters (including double filter material filter) of filtering material should have enough chemical stability, relative density and particle size of each medium should have certain difference, double layer composed of anthracite coal and quartz sand filter material filter used anthracite relative density of 1.4-1.6, particle size 0.8 1.8 mm, quartz sand relative density is 2.6 2.65, particle size of 0.5-1.2 mm;
In addition to the above two kinds of filter materials, the three-layer filter filter can also use heavy mineral ores such as manganese sand and magnetite, whose relative density is 4.7-5.0 and the particle size is 0.5-4mm.