Why use sand filter in irrigation system?

In modern agricultural production, effective water resource management is key to improving efficiency and sustainability. Sand and gravel filters, as an efficient water treatment technology, play a crucial role in agricultural irrigation. These filters improve the efficiency and reliability of irrigation systems by removing impurities and particles from the water, ensuring the purity and uniformity of the water flow.

Firstly, sand and gravel filters significantly improve the quality of irrigation water. By filtering out sediments and other suspended particles, they reduce clogging and wear on irrigation equipment, extending the lifespan of the equipment. This not only reduces maintenance costs but also ensures the continuous operation of the irrigation system, avoiding production interruptions due to equipment failure.

Secondly, sand and gravel filters also play an important role in water conservation. By improving water use efficiency, they help farmers reduce their demand for water resources, especially in areas where water is scarce. This not only contributes to environmental protection but also brings direct economic benefits to agricultural producers.

Furthermore, sand and gravel filters have a positive impact on increasing crop yield and quality. With purer and more uniform water flow, crops can better absorb water and nutrients, thereby increasing yield and improving quality. This is crucial for enhancing the market competitiveness of agricultural products.

In summary, the application of sand and gravel filters in agricultural irrigation provides an efficient and economical solution for agricultural production. They not only optimize the performance of irrigation systems but also provide strong support for sustainable agricultural production. Learn more about sand and gravel filters, and let us help you achieve more efficient and environmentally friendly agricultural irrigation.

Sand Filter As Primary Filtration  

Model Selecting

The Working Principle

DMF automatic backwash sand filter

Using three-dimensional filtration of sand, as primary filtration to deal with organic and inorganic impurities in water. Sand filters should be selected once the contents of organic impurities in the water is over 10mg/h.

Features:

1.High flow rate with low pressure loss.

2.Modularized setting, compact, with less piping reducing the investment.

3.One or multi-parallel filtration units are available according to the requirement of irrigation project.

4.Automatic backwash

The Filtering Process

Filtering with media filters, also known as depth filtration, is done by filtering water through a thick layer of graded particles, called the filter bed. These particles can be sand, gravel or other granular materials. The filtration degree depends on the effective size of the bedding and the water velocity through the filter. 

Raw water enters from the filter inlet (1) and percolates through the filter bed (2). Suspended materials come into contact and attach to the media particles. Clean water flows through the filtration nozzles (3) and out of the filter via the outlet valve (4). 

The gradual dirt buildup in the filter bed causes an increase in the pressure differential across the filter and when it reaches its maximum design value, a cleaning process should be performed. In automatic media filter installations a pressure differential switch senses the pressure differential and when it reaches a preset value, the self cleaning process begins.  

The Cleaning Process

Cleaning is done by backwashing; pressurized water flows in reverse direction - from the nozzles upwards, causing suspension of the filter bed, thus releasing the suspended matter from the bedding. The dirt particles are then washed out of the filter through the back-flush valve. In automatic media filters installations the cleaning process is done by the system's controller. When the pressure differential switch senses that the differential pressure across the system reached a pre-set value, a signal is sent to the flushing controller and the self cleaning process begins.

The Components of Sand Filter  

Irrigation Filtration Solution  

To get the best filtration effect, improving water quality and protect irrigation systems, different types of filters should be combined according to different type of raw water.

Site Installation 

Sand filter and  screen filter

Sand filter and  disc filter

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