Quartz sand filtration is one of the most effective means to remove suspended solids in water. It is an important unit in advanced sewage treatment, sewage reuse and water supply treatment. Its function is to further remove the flocculated pollutants in the water. It achieves the purpose of water purification through the interception, sedimentation and adsorption of filter materials.
　　Working principle
　　Quartz sand filter uses quartz sand as filter medium. The filter material has the remarkable advantages of high strength, long service life, large treatment flow and stable and reliable effluent quality. The function of quartz sand is mainly to remove suspended solids, colloids, sediment and rust in water. Pump pressure is used to remove suspended solids from raw water through filter media, so as to achieve the purpose of filtration.
　　technical parameter
　　1. Treatment effect
　　(1) Influent turbidity: < 20FTU, effluent turbidity: < 3FTU;
　　2. Interception capacity: 5-15Kg/m (filter material).
　　2. Working environment parameters
　　(1) Working temperature: 5 - 60 C (special temperature can be customized);
　　2. Work pressure: <0.6 MPa;
　　3. Influent water pressure: > 0.04 MPa;
　　4. Backwash water pressure: > 0.15 MPa;
　　5. Import and export pressure difference: 0.01-0.015 MPa.
　　3. Operating parameters
　　(1) Working mode: pressure mode;
　　2. Operation mode: water flow from top to bottom;
　　3. Filtration speed: 15-20m/h;
　　4. Operation cycle: 2-7 days;
　　5. Backwashing method: water washing, or air-water combined backwashing;
　　6. Backwashing water consumption: 1-3%;
　　. Backwashing strength: 4-15L/s.m.
　　It is. The backwashing time was 5-7 min.
　　It is. The swelling rate of backwashing is 40-50%.
　　Application scope
　　1. For industrial water, domestic water and municipal water supply systems requiring effluent turbidity less than 5 mg/L to meet drinking water quality standards; 2. Removal of suspended solids and solids from industrial sewage;
　　3. It can be used as pretreatment equipment in ion exchange softening and desalination system, coarse filtration equipment for industrial feed water with low water quality requirement, as well as in swimming pool circulating treatment system and cooling circulating water purification system.