Filtration Principle
Quartz sand filter is a kind of special filter that takes quartz sand as the filter media to remove impurities in water. Quartz sand has the advantages of low filtration resistance, large specific surface area, strong acid and alkali resistance and good pollution resistance, etc. can be used to intercept and adsorb sediment, colloidal particles, metal ions and organic matters in water. lt has the advantages of no pollution, low price and low operating cost, which is widely used in water treatment and wastewater treatment.The unique advantage of quartz sand filter is that it realizes the self-adaption operation of filter by optimizing the filter media and filter design. The filter media has strong self-adaption to the concentration, operation condition, and pre-treatment process of the raw water. That is to say, the filter bed automatically shows the state that the upper part is sparse and lower part is dense in the process of filtration, which is conducive to ensuring the quality of the outlet water under various operating conditions. The filter media is fully dispersed and the cleaning effect is good when back washing. lt has the advantages of fast filtration speed. high filtration precision and great sludge interception capacity.
Main Characteristics
Quartz sand filter has simple structure and easy operation and convenient backwashing process, which mainly change the running direction of water by adjusting 4 valves; When it works normally, the water enters into this filter from the top and flows out from the bottom;When it conducts the backwashing process, the water enters into this filter from the bottom and flows out from the top. The wastewater is conventionally. The two processes will be repeated til the water is clean.discharged by the wastewater discharge valve, and then clean it Gradation when loading the quartz sand: Sand size for the wastewater interception layer is 0.5-1.0mm, with the height of above 700mm; by cobblestone with the diameter of 1-2mm and placed on the height of Two load-bearing layers are made by cobblestones: One layer is ma150-200mm, the other layer is made by cobblestone with the diameter of 2-3mm and placed on the height of 150-200mm.water is 0.5-1.0Kg/m3, the sludge interception capacity for the water The sludge interception capacity of this device for the water treat by lime is 1.5-2.0 Kg/m3, and the sludge interception capacity for the water after coagulation treatment is 2.5-3.0 kg/m3.
