石英砂过滤(国外英文资料).docVIP

石英砂过滤(国外英文资料) Pretreatment system - sand filtration (quartz sand filtration) Orders to record 1, the introduction of sand filter 2, sand filter principle Sand filter structural characteristics Design parameters and technical parameters of sand filter The cleaning process of the sand filter system 1. Introduction of sand filter Sand filter, also known as mechanical filter, is known as Shallow medium filter. It is by using quartz sand as filter media, under the condition of constant pressure, higher turbidity of water body from top to bottom through a certain thickness of granular or granular quartz sand, part of suspended solids, organic matter, colloid particles in water, microorganism, chlorine, smell, and part of heavy metal ions trapped in sand body, eventually to reduce water turbidity, the purpose of purifying water quality. Quartz sand filtration is one of the most effective way to remove suspended solids in water, sewage water supply, wastewater recycling and processing is important in the unit, it is mainly used for water treatment in addition to the turbidity, demineralized water, ultrafiltration, nanofiltration, reverse osmosis pretreatment. The sand filtration system can be classified into two categories: regular quartz sand filters, also known as shallow dielectric filters. Another is a new filter called a continuous sand filter, also known as a flow sand filter. Its different from conventional sand filter is that it will ably filter and sand washing process in different parts of independently at the same time, do not need to configure the clear water reserviors and high power backwash water pump, the filtering operation to continuous and stable operation. The following is a general introduction to conventional quartz sand filters. 2, sand filter principle Mechanical filter adsorption is a kind of physical adsorption, according to the loading way of filter material is generally can be divided into loose area (coarse sand), close area (fine), suspended m