Product Introduction
The automatic back washing sand filter for agricultural irrigation is key equipment to ensure the quality of irrigation water. It can effectively remove impurities such as sediment, suspended solids and algae in natural water sources, prevent the blockage of sprinkler nozzles and the wear of drip irrigation emitters, ensure the healthy growth of crop roots and improve the planting efficiency.
Working Principle
The water flow enters the filter from the top and passes through the filter tank filled with homogeneous quartz sand from top to bottom under the action of gravity and pressure. The impurities in the water are intercepted by the pores between the quartz sand particles, and the clean water flows out from the bottom of the tank. When the pressure difference between the inlet and outlet of the filter reaches the preset threshold (usually 0.05 – 0.1MPa), the back-washing program is automatically started. At this time, the inlet and outlet water valves are closed, and the back-washing valve is opened. The water flow enters the tank from the bottom in the opposite direction, fluidizing the quartz sand filter media, peeling off the impurities and discharging them through the sewage outlet with the waste water.
Product Advantages
- Efficient Filtration: Adopting the “multi – layer gradient filter media + deep – filtration process”, it can precisely intercept various impurities with a particle size of 20 – 80μm, and the filtration efficiency is as high as over 98%, and the effluent turbidity is ≤5NTU.
- Intelligent Back – washing: Equipped with a differential pressure sensing automatic back – washing system, it can monitor the accumulation of impurities in the filter layer in real – time and automatically start the back – washing program. The filter media can be regenerated within 3 – 5 minutes, and the back – washing water consumption only accounts for 1.5% – 2% of the total treated water volume.
- Excellent Material: The shell is made of high-quality materials such as anti-corrosion carbon steel and 304 stainless steel, which is acid and alkali resistant, aging resistant and sandstorm resistant. The compressive strength reaches 0.6 – 1.2MPa, and the service life is as long as 10 – 15 years.
- Wide Adaptability: It provides a variety of models and specifications. The single – unit treatment capacity covers 5 – 150m³/h, and it supports single – tank independent operation or multi – tank parallel combination, which can adapt to different planting scales and irrigation modes.
Application Scenarios
It is suitable for scenarios with high water quality requirements and long-term stable operation, such as large-scale farms, golf courses and municipal greening. It can also be used for the filtration of open-water bodies such as rivers and lakes, and can effectively protect the water pumps, valves and other equipment in the irrigation system.
Technical Parameters
- Filtration Precision: 50 – 200um
- Working Pressure: 0.2 – 0.6MPa
- Material: Carbon steel, stainless steel