Everyone knows that reverse osmosis membranes need to be cleaned or replaced after a period of use, so how long does the old reverse osmosis membrane last, and how often is it appropriate to replace it?
Reverse osmosis membrane is one of the commonly used membrane types in water treatment. Due to the influence of water quality and other factors, the replacement cycle of reverse osmosis membrane in current water treatment is generally 3-5 years. The specific replacement time depends on the daily maintenance and maintenance of the reverse osmosis membrane. Whether the cleaning is timely and the quality of the water will also determine how long the membrane can be used.
How long is the replacement cycle for reverse osmosis membranes?
How long is the replacement cycle for reverse osmosis membranes? This mainly depends on your actual situation. How you use it, influent water quality, operation, maintenance, maintenance and other factors will affect the replacement cycle of the reverse osmosis membrane. According to the survey, there are good users for 4-5 years, and some for 2-3 years. Generally speaking, reverse osmosis can be used for 3-5 years with a little attention. The quality of the film is also the key. For inferior products, although the price of the refurbished film is cheap, the quality is not good. No matter how you maintain it, it will not take long for problems to occur. Therefore, it is recommended to purchase from a large-scale genuine company.
Depending on the water pollution and water consumption in different regions, the replacement time will also vary. In addition, because the combination of the reverse osmosis water purifier filter element is different, the replacement time of the old reverse osmosis membrane will also be affected to a certain extent. You can judge according to the taste of the water from the water purifier and the size of the water output. If it is found that the water output of the water purifier is greatly reduced, the waste water volume is increased, and the taste of the water is obviously different, the reverse osmosis membrane can be replaced.
Therefore, the replacement time of the old reverse osmosis membrane is not certain. It needs to be replaced in a short half year, and the long one can reach 3-5 years. The key is whether it can meet the water purification requirements. If it can meet the requirements, it does not need to be replaced. It should be replaced in time.
How Reverse Osmosis Membrane Works
The reverse osmosis membrane is the main component of the water purifier and has a good water purification effect, but many people do not understand how it works. The following second-hand reverse osmosis membrane manufacturers will briefly introduce its working principle.
When the same volume of dilute solution and concentrated solution are placed on both sides of the semipermeable membrane, the solvent in the dilute solution will naturally pass through the semipermeable membrane and flow to the concentrated solution side spontaneously, a phenomenon called permeation. When the osmosis reaches equilibrium, the liquid level on the concentrated solution side will be higher than that of the dilute solution by a certain height, that is, a pressure difference is formed, and this pressure difference is the osmotic pressure. The size of the osmotic pressure depends on the inherent properties of the solution, that is, it is related to the type, concentration and temperature of the concentrated solution and has nothing to do with the properties of the semipermeable membrane.
If a pressure greater than the osmotic pressure is applied to the concentrated solution side, the flow direction of the solvent will be opposite to the original permeation direction, and it will begin to flow from the concentrated solution to the dilute solution side. This process is called reverse osmosis. Reverse osmosis is a reverse migration movement of osmosis. It is a separation method that separates solutes and solvents in solution by means of selective interception of semipermeable membranes under pressure driving. It has been widely used in various liquids. Purification and concentration, one of the more common application examples is in the water treatment process, the use of reverse osmosis technology to remove impurities such as inorganic ions, bacteria, viruses, organic matter and colloids in raw water to obtain high-quality pure water.