Brackish water is when the chloride in a water source exceeds the normal range. Brackish water is formed mainly due to excessive water use, or when the water level is below sea level due to changes in the earth’s crust, when seawater is backed up, or when surface water flows through saline areas. Since chloride is different from other substances, it can be removed by using some kind of filter media, and the process of removing chloride is generally treated by reverse osmosis technology, which is a water treatment technology developed in recent years, especially for the treatment of chloride in water, so that the salt water can be desalinated or treated to meet the drinking water standards. Brackish water contains many heavy metals and harmful impurities, bitter taste, it is difficult to drink directly, long-term consumption leads to gastrointestinal disorders, low immunity. Therefore, brackish water treatment is necessary.
At present, most of the brackish water desalination method uses distillation, reverse osmosis and electrodialysis method.
● Distillation method: Distillation is the process of heating brackish water or seawater to make it boil and evaporate, and then condensing the steam into fresh water. There are many kinds of distillation methods, such as multi-effect evaporation, multi-stage flash distillation, pressure vapor distillation, membrane distillation, etc.
● Electrodialysis: Electrodialysis is a separation technique that uses ion exchange membranes to separate anions and cations in brine under the action of an electric field, thereby reducing the concentration of salt in the freshwater chamber and obtaining fresh water.
● Reverse osmosis: Reverse osmosis is a widely popular water treatment method in the world today. Under the action of external force, the solute in the solution is forced to separate from the solvent with the help of the retention effect of semi-permeable membrane, thus achieving the purpose of concentration, purification or separation. Not only can remove various ions in water, but also particles larger than ions, such as most of organic matter, colloids, viruses, bacteria, suspended matter, etc. Therefore, reverse osmosis separation method is also known as broad-spectrum separation method. Reverse osmosis brackish water desalination method can remove more than 90 % of dissolved salts and more than 99 % of colloidal microorganisms and organic matter, etc. from water.
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Types Of Valves For Brackish Water Treatment
Regardless of the purification method, valves can help regulate the flow of water, thereby increasing project capacity.
Shut-off valves are valves that allow the flow of media or shut-off by opening or closing a shut-off part. Ball valves, butterfly valves, gate valves and globe valves are all shut-off valves. They are used in a wide variety of water treatment facilities and help regulate water flow. They are easy to operate, easy to maintain, and can effectively increase project capacity.
Can be used with electric or pneumatic actuators to achieve the purpose of remote control and reduce labor costs.
The Y-strainer contains a strainer for filtering impurities in the pipeline, making the medium purer and thus extending the service life of industrial fittings such as pipes, valves and pumps.
Check valve is a valve that relies on the pressure of the pipeline to start, to prevent the backflow of media. They are generally used next to pumps, water meters, or other electrical equipment to prevent backflow of media back into the electrical equipment and reduce maintenance costs.
Choosing the right valve for a brackish water treatment plant will allow the system to operate well and increase capacity. Any demand for valves, feel free to consult us for a free valve solution. email@example.com