Quartz sand filter, the scientific name of shallow medium filter, it is the use of quartz sand as filter medium, under certain pressure, the high turbidity water by a certain thickness of granular or the grain of the quartz sand filter, effectively intercept to remove the suspended solids in the water, organic matter, colloid particles and microorganisms, chlorine, smelling and some heavy metal ions and so on, eventually to reduce water turbidity, water quality purification effect of a high efficiency filtration equipment.