What are the differences between seawater desalination, softening and desalination-Ocpuritech-img

What are the differences between seawater desalination, softening and desalination?

by:Ocpuritech     2021-03-30
What are the differences between seawater desalination, softening and desalination? Author: seawater salinity means all dissolved solids to water ratio by weight of, usually expressed in grams per kilogram of seawater contained. The carbonate hardness of natural seawater is between 70 and 90dH, but the hardness of the surface water we use must not exceed 25dH, so the seawater must be softened and desalinated before it can be used by us. So what are the differences between seawater desalination, softening and desalination? Seawater desalination Seawater desalination equipment is simply salt water desalination. The most intuitive appearance is that it reduces the conductivity of water quality, mainly to reduce the salinity of the water. Seawater desalination is the use of seawater desalination to produce fresh water. It is an open source incremental technology to realize the utilization of water resources. It can increase the total amount of fresh water and is not affected by time, space and climate. It can ensure stable water supply such as drinking water for coastal residents and industrial boiler water supply. Commonly used seawater desalination methods include seawater freezing, electrodialysis, distillation, and reverse osmosis. At present, the reverse osmosis method using reverse osmosis membranes quickly occupy the market due to its simple equipment, easy maintenance and modular equipment, and gradually replace distillation Law has become the most widely used method. Seawater softening Seawater softening, as the name implies, is hard water softening, and has no direct relationship with electrical conductivity. The main purpose is to reduce the hardness of water. Sea water contains a large amount of calcium, magnesium, bicarbonate and sulfate ions, which causes the formation of hard scale CaSO4 and soft scale (CaCO3 and Mg(OH2) on the surface of the heat exchange tube or membrane of the desalination unit during the desalination process. , Resulting in reduced heat transfer efficiency or membrane flux, affecting the normal operation of the equipment. Therefore, in the pretreatment stage, soft water equipment is needed to soften the seawater and remove the calcium and magnesium ions. This will save energy and reduce the long-term stable operation of the equipment. Economic costs are of great significance. Seawater desalination Seawater desalination is a method or process for removing 'chemical salt'. Desalination is a method or process for removing 'salt' in a broad sense. This 'salt' is broader. 'Chemical salt' is not only commonly used edible 'saltThe environmental protection desalination company specializes in the production of warships, islands, and mobile and portable desalination equipment for many years. It has extremely rich experience. Currently, there are successful cases in Venezuela, Cambodia and other countries. For more information, please refer to this website.
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