The continuous sand filter is used to clean and produce water for drinking, industrial processes, waste water recycling and waste water treatment before the water is discharged into a recipient.
The continuous sand filter is a high-efficiency filter integrating coagulation, clarification and filtration. The filter is based on the counter-flow principle. The raw water enters the filter through the water distributor through the water inlet pipe at the bottom.
The water flows from the bottom upwards through the sand filter bed. The filtered liquid after sand filtration gathers at the top of the filter and flows out through the counterflow port. The contaminated filter material at the bottom of the filter is lifted to the sand washer at the top of the filter by compressed air, and the contaminants are separated from the continuous flowing sand by turbulent action. Bed to achieve continuous filtration.
1. The complete set of equipment has a simple structure, completely eliminating the traditional backwashing device, eliminating the need for backwashing pumps, greatly reducing the system’s auxiliary valve management system, and greatly simplifying operation and maintenance.
2. The operator can directly observe the cleaning process of the quartz sand filter material and adjust it according to the operating conditions to achieve the best filtration effect.
3. No need to replace quartz sand filter material regularly, the filter material has a long service life.
4. Strong ability to resist impact load, adapt to a wide range of water quality, not easy to block.
5. The coagulation reflection effect is obvious: the coagulation reaction mechanism and the sedimentation mechanism are used to effectively remove suspended solids and colloidal substances in the water, and the treatment effect is continuously good.
6. Homogeneous filter material, the filtering effect is stable and good.
Active sand filters are widely used in various water treatment occasions that need to be filtered, especially for the purification of industrial process water, sewage and industrial wastewater, and can remove suspended solids and colloidal substances in water.
Continuous sand filter system consists of sand filter tank, water inlet pipe, water distributor, sand pump, sand washing device, quartz sand (homogenization coefficient 1.4), filtrate outlet pipe, rinse water outlet pipe, air compressor and control System and so on. The equipment has a low operating cost and does not require a high-lift and large-flow backwash pump. High efficiency, 24 hours of continuous work, no need to stop backwash, no need to backwash valves and spare filters. The active sand filter has no rotating parts other than quartz sand filter material during operation, which has low failure rate and low maintenance cost. The water head loss is small. Because the single-stage filter material is used and the filter material is clean and timely, the water head loss of the active sand filter is very small, about 0.6m. The influent water quality requirements are loose, the filtering effect is good, and the effluent water quality is stable. The filter material is clean and timely, which can ensure high-quality and stable water outlet effect without periodic water quality fluctuations.
