Hoog rendement van ontzilting van brak water, minder landbezetting en gemakkelijke bediening

The basic principle and characteristics of reverse osmosis method use a selective permeability membrane to divide a container into two halves, and add pure water and salt water to both sides of the membrane at the same time, so that the liquid level on both sides of the membrane is the same, and after a certain Over time, the liquid level on the salt water side will rise, and the liquid level on the pure water side will fall, which is the result of the migration of water molecules to the salt water side through the semipermeable membrane. This phenomenon is called osmosis. Membranes that are selectively permeable to water or solutions are called semipermeable membranes. Permeation can be stopped if appropriate pressure is applied to the concentrated solution. The pressure at which the permeation of a dilute solution to a concentrated solution stops is called the osmotic pressure. Reverse osmosis is to add a higher pressure than natural osmosis on one side of the concentrated solution, reverse the direction of natural osmosis, and press the ions in the solution to the other side of the semipermeable membrane, which is contrary to the normal osmosis process in nature, so it is called "Reverse osmosis", such a device is called a reverse osmosis device. The reverse osmosis method can remove more than 90 percent of soluble salts and more than 99 percent of colloidal microorganisms and organic matter from water. Compared with other water treatment methods, it has the advantages of no phase change, normal temperature operation, simple equipment, high efficiency, less land occupation, convenient operation, less energy consumption, wide adaptability, high degree of automation and good water quality. In particular, the reverse osmosis purification device powered by wind and solar energy is an economical and reliable way to solve the problem of people's domestic water in areas without electricity and conventional energy shortage. Reverse osmosis desalination is not only suitable for seawater desalination, but also for brackish water desalination. Among the existing desalination methods, the reverse osmosis desalination method is the most economical, and it has even surpassed the electrodialysis desalination method. Since the driving force of the reverse osmosis process is pressure, there is no phase change in the process, and the membrane only plays the role of "screening", so the energy consumption of the reverse osmosis separation process is low. Among existing seawater and brackish water desalination, reverse osmosis is the most energy-efficient. The characteristic of reverse osmosis membrane separation is its "broad-spectrum" separation, that is, it can not only remove various ions in water, but also remove particles larger than ions, such as most organics, colloids, viruses, bacteria, suspensions, etc. Therefore, the reverse osmosis separation method is also known as a broad-spectrum separation method.