Efficient filter tow fiber filter using polymer fiber material. The material from the Chinese Academy of Preventive Medicine and Environmental Hygiene monitoring on polyacrylamide resin acute oral toxicity test, accumulative toxicity test, Ames test, CHL cell chromosome aberration test and harmful content, and the results for the non-toxic, non-obvious accumulation, no mutagenicity, in line with China on food hygiene standards. Diameter of the filament is um level (2.5dtex, 18dtex), its large filter surface area than the rigid, easily adsorbed colloids suspended in water turbidity and impurities. Fiber surface adsorption of colloidal suspension turbidity and impurities. First, the fiber bundle filtration media works, the use of filters or filter the water level in a top-down gravity filter layer compression filter fibers in the dense state, improve the effectiveness of the filter layer trapped impurities to ensure the filtered water quality. When flushing, gas and water from the bottom up to the impact of the disturbance, so that the filter is suspended wispy loose state, the filter layer adsorption trapped material to be eluted. In order to achieve the optimum fiber filter filtration and filling disorderly orderly filling backwash. When using water from the upper and lower water. At this time, the water under the action of gravity and the fiber density of the fibers to promote the adjustment means run down the filter bed, the fiber filter layer is compressed, its bulk density is gradually increased along the flow direction of the filter layer along the water flow direction porosity becomes smaller by a large, corresponding filter pore diameter and pore decreases, thus forming a particularly desirable variable void deep filter status. The filtration process both lateral depth filtration, depth filtration are also longitudinally, thereby effectively improving the filtering accuracy. When the filter needs cleaning contaminated layer of renewable, clean water in the opposite direction through the fiber filter bed, in the backwash water and cleaning air role, the fiber density adjustment device driven by the upward movement of the fiber filter bed, the fiber filter upward, reaching loose state, by mixing air and water cleaning technology, and everything in bubbles and water washing process, fiber filter vertical jitter in a constant state, thereby making fiber filter cleaning is very thorough, so as to achieve the desired cleaning effect. Second, the scope for: treatment of drinking water (tap water, drinking water, pure water, high pure water) Industrial Water Treatment (electricity, chemicals, printing and dyeing, electroplating and other industries efficient filter) circulating water (swimming pool water, aquarium water cycle, Waterpark, artificial landscape, freshwater aquaculture) cooling water treatment (industrial cooling water, air conditioning cooling water, cooling systems add water, cooling water treatment purification system next) directly treated sewage treatment (sewage or industrial waste physicochemical / biological treatment of effluent ) Water (miscellaneous water reuse, hotel water treatment, water treatment residential area) III filter tow technical parameters: Material: fiber filter using polymer modified fiber materials. Chemical stability, water treatment process without harmful ingredients dissolution, no significant accumulation, and no mutagenicity, filament diameter is 2.5dtex, 18dtex. 2: the effective length of the fiber bundle: a filter press design size. 3, the working environment 1) Water pressure 0.2Mpa; 2) filtration rate is 60 ~ 80m / h; 3: backwash water intensity ≥ 6L / m s; 4:? Backwash gas intensity ≥ 50L / m S; 5?: backwash water pressure 0.1 ~ O.15Mpa; 6; backwash air pressure /> o.05Mpa; 7: Maximum working pressure 0.4Mpa; 8: Operating temperature O ~ 50 ℃; 9: backwash time of 25 to 35 minutes; 10 : Final head loss is generally 0.05Mpa, shall not exceed 0.1M pa; Fourth, it uses the advantages of fiber filter as filter material of polymer fibers, filament diameter of up to several tens of microns to a few microns, are micron filter material (sand filters are millimeter), with a huge surface area and adsorption capacity for retention of particles in the water have greatly improved. When removal of suspended solids in water close to 100% by good coagulation treatment of water, suspended solids content of 20mg / L, filtered effluent suspended solids up to 1mg / L or less. Bacteria, viruses, organic molecules, colloids, iron and other impurities are removed obvious effect. Diameter larger than 5um suspended solids removal rate of 90-95%. Solve the granular media filtration accuracy by filter size restrictions and other issues. Quartz sand and other granular material filtration equipment replacements. Mechanical adjustment device according to the water quality and filtration rate requirements, quickly adjust the bulk density filter media bundle. Higher quality fiber filter has the following advantages: ⑴ chemical stability, water treatment process without harmful ingredients dissolution; ⑵ anti-friction high-intensity gas-water Sin, collision, shear force and the loss of damage does not occur to run material; ⑶ durable for many years immersed in water does not rot, life in general up to 5 to 10 years; (4) filtration resistance, fast filter in the 25-35m / h speed range of the filter can be guaranteed a good filtering effect. (5) Automatic tow filter layer is formed along the flow direction of the filter bed porosity of the filter is gradually reduced gap-variable filter layer, without the need for manual such as the particle filter gradation (6) filter layer order: fiber bundle Hanging in the filter media or filter, impact resistance, do not mess layer, not lost, can withstand high intensity cleaning, including the large flow of gas - water combined cleaning. (7) interception capacity, usually 5 ~ 15kg/m3 medium is 2 to 3 times the conventional filter. Small (8) covers an area of ??manufacturing the same amount of water, covering only the traditional filter 1/3 to 1/8. (9) tons of low cost, the system take the same amount of water, cost less than conventional filters. (10) backwash water consumption is low, only 1-3% of the cycle the water system, the backwash generally available raw water.