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Factors of selecting large flow filter element in pretreatment of reverse osmosis system

As the name suggests, the large flow filter element is larger than other filter elements, so it is called large flow filter element, large flux filter element.

In general wastewater treatment, filter elements are used in seawater desalination, industrial wastewater and reclaimed water reuse and pretreatment of reverse osmosis system. The filter elements include large flow filter elements (Pall pall large flow filter element, Parker Parker large flow filter element, 3M large flow filter element), microporous folding filter element, PP cotton filter element, wire wound filter element and other forms. I don’t know how to choose, but I can judge from the system design, flow and pressure.

Large flow filter element is generally used in filters with large flow and high pressure. Why does this filter have a large flow?

Firstly, from the process structure of his production: the large flow filter element adopts the structural form of folding membrane filter element according to its filtration principle. At the same time, according to different on-site process requirements, such as flow, pollutant carrying capacity and temperature resistance, vertical pleating and horizontal pleating can be selected.

Vertical discount design and process: generally, as the core component of large flow filter, its discount process increases its filtering area in a limited space. Folding technology can ensure that fluid passes through each unit area of filter medium. The foldable design increases the effective filtering area and makes the filter element more efficient, compact and strong pollution holding capacity.

The high flow filter element is mainly used as the pre security filter of the reverse osmosis system. Generally, the high flow filter element 5um is used. Under the same flow, only a smaller number of filter elements need to be installed, which brings great convenience to the system maintenance and filter element replacement; With absolute precision filtration characteristics, it can effectively remove trace suspended solids in water, prevent solid impurities and particles from entering RO reverse osmosis system, prolong the service life of expensive reverse osmosis membrane elements, and ensure the operation of reverse osmosis pure water system and the stability of water production.

Horizontal discount large flow filter element: it is an external pressure (from outside to inside) flow direction. The filter medium is made of polypropylene, with loose fiber structure. The high air gap rate increases the capacity of impurities, which has a deep three-dimensional filtering effect. It belongs to compound deep interception, and its filtering area is larger than that of vertical discount. That is, larger particle impurities are trapped on the fiber surface, while fine particles are captured in the deep layer of the filter material.

The high flow filter element has a wide range of accuracy. It can be selected between 0.1 micron and 100 micron. Generally, 5 micron is commonly used.