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Application Of Membrane Separation Technology In Chemical Water Treatment Of Power Plants
- Sep 05, 2018 -


      At present, in the chemical water treatment of power plants, the application of membrane separation technology is mainly used for the filtration and purification of boiler feed water. There are three ways of application: ultrafiltration, reverse osmosis and electric desalting, commonly known as the three membrane process. After the whole membrane separation technology is used to treat the boiler feed water, the purity of the water obtained is high, and the treatment effect of the mixed bed of Yin and Yang can be achieved. Moreover, the acid and alkali regeneration is not needed, which greatly simplifies the water treatment process, and does not produce waste liquid pollution. It has great environmental protection significance, and the degree of automation is relatively higher.

Ultrafiltration technology (UF)

      Ultrafiltration membranes are used to remove macromolecules from water. Ultrafiltration membranes have relatively large pore sizes and can only intercept colloids, viruses, particles and other macromolecules in water, but can not intercept dissolved salts and other molecules in water. Therefore, Ultrafiltration membranes are often used as the first water treatment technology in power plants. In a process.

Reverse osmosis technology (RO)

      This is a technical method of water treatment using reverse osmosis membranes. Most of the reverse osmosis membranes are made of macromolecule materials. The selective permeability of reverse osmosis membranes is mainly for water molecules, that is, only water molecules can pass through, and other substances are intercepted in the membranes. The pore size of reverse osmosis membrane is very small, about 1 nm, so it can remove salt, microorganism or organic matter from water to a large extent, and the removal rate can generally reach 97%.