The key feature of a multi-media filter is its graded filtration capability.From top to bottom,the media size progresses from coarse to fine,and density from small to large,creating an ideal pore distribution for high-efficiency particle removal.It offers long service cycles and high dirt holding capacity,tolerating some influent water quality fluctuations.Employing air-water combined backwash technology,it thoroughly cleanses captured impurities from the filter bed,restoring media performance.Automated controls enable unattended operation.The robust structural design ensures even water distribution and collection,preventing short-circuiting and channeling for consistent effluent quality.
Typical flow rates range from 5 to over 100 cubic meters per hour.Vessel materials are typically carbon steel(rubber-lined),304 stainless steel,or 316 stainless steel for corrosion resistance and longevity.A common media configuration is anthracite(0.8-1.2mm)on top,quartz sand(0.5-0.8mm)in the middle,and a garnet or coarse gravel support layer at the bottom.Standard operating pressure is 0.35-0.6 MPa,with a maximum design temperature of 50°C.Port sizes range from DN50 to DN250 flanges based on flow rate.Control options include manual,semi-automatic,or fully automatic PLC control.
Widely used for pre-treatment of circulating cooling water in power,chemical,steel,and electronics industries;turbidity removal in municipal water supply and reclaimed water systems;pre-filtration for protecting membrane systems like Reverse Osmosis(RO)and Ultrafiltration(UF);and preliminary purification for process water in textiles,paper,and other industries.It plays a critical role in seawater desalination pre-treatment,effectively reducing turbidity to ensure the safety and stability of downstream membrane elements.
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