NF Nanofiltration Equipment

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Shandong Shekesaisi Water Treatment Technology Co., Ltd

Shandong, China

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Between reverse osmosis and ultrafiltration, there is a membrane separation method called nanofiltration that is pressure-driven. Nanofiltration membranes have pores with pore sizes ranging from a few nanometers. It emerged later than other pressure-driven membrane separation techniques. Its emergence can be linked to studies conducted in the late 1970s on JE Cadotte's NS-300 membrane. Following that, nanofiltration advanced quickly, and in the middle of the 1980s, the membrane module was put on the market. Reverse osmosis membranes, such as CA, CTA, aramid composite, and sulfonated polyethersulfone membranes, are the primary source of nanofiltration membranes.
Small organic molecules like glucose and sucrose, as well as inorganic salts with relatively low molecular weights, can be separated from solvents using a process called nanofiltration (NF). Low-pressure reverse osmosis, or nanofiltration, is a relatively new area of membrane separation technology that produces separation effects by allowing certain solvents and inorganic salts to pass through the membrane.
Fundamental of NF Nanofiltration Equipment

Membranes for electrical adsorption that are charged are used in nanofiltration. The pressure needed by the nanofiltration membrane is lower than that of the reverse osmosis membrane in order to generate water in the same conditions and with the same quality. Thus, there are some similarities and some differences between reverse osmosis and nanofiltration in terms of separation principles.
The nanofiltration membrane's unique performance is determined by its pore size and surface properties. It has distinct Donann potentials for ions with varying charges and valences; its separation mechanism consists of the coexistence of sieving, dissolution, and diffusion, as well as charge repulsion. In comparison to ultrafiltration and microfiltration, the separation performance of nanofiltration membrane is significantly better.
It can effectively remove divalent and multivalent ions, various substances with a molecular weight greater than 200, and partially remove monovalent ions and substances with a molecular weight less than 200. Its benefits over reverse osmosis membranes include energy savings, low process osmotic pressure, low operating pressure, and partial removal of monovalent ions.

Characteristics of NF Nanofiltration Equipment
1. The system has excellent filtration precision, consistent processing results, ease of maintenance, elegant equipment design, and precise production.
2. According to customer requirements, complete automatic control can be realized, the automatic control design is flawless, and the system parameters are precisely regulated.
3. Depth of knowledge in system design, with the ability to build anything from big industrial systems that can move hundreds of tons per hour to laboratory apparatus that can move tens of liters per hour.
4. The design is rigorous and standardized, and the system process design is carefully tested.

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