Detailed explanation of reverse osmosis

Reverse osmosis equipment processes raw water through fine filters particles activated carbon filters and compressed activated carbon filters, etc., then pressurizes it with a pump, using a pore size of 1/10000μm (equivalent to 1/6000 the size of E. coli and 1/300 the size of a virus) reverse osmosis membrane ( RO membrane ), turning high-concentration water into low-concentration water, while isolating industrial pollutants, heavy metals bacteria, viruses, and other impurities that are mixed into the water, thus achieving the drinking water's physical and chemical indicators and hygiene standards, producing extremely pure water, which is the best choice for the human body to replenish high-quality water in a timely manner. Because the purity of water produced by RO reverse osmosis technology is the highest among all water production technologies currently mastered by mankind, and the cleanliness is almost 100%, people call this water production machine reverse osmosis pure water machine.

Reverse osmosis is a modern and novel pure water treatment technology. It uses reverse osmosis components to improve the purity of water and remove impurities and salts. The pure water we drink daily is treated by reverse osmosis equipment, and the water is clear.

The first country in the world to use reverse osmosis technology was the United States, which invented membrane separation technology . With the promotion of this technology, China began to use reverse osmosis technology. The pure water equipment on the market all uses reverse osmosis membrane processing technology, and has undergone certain improvements and design innovations in China. The technology is very mature.

Reverse osmosis pure water equipment has a reverse osmosis membrane design. The pressure on both sides of the membrane is different. Using the pressure difference as the driving force, the raw water is forced through the reverse osmosis membrane. Salt with low concentration will permeate towards the high-concentration salt side, and the equilibrium state is reached, which is the osmotic pressure of the liquid. When the pressure on the salt water side is greater than the osmotic pressure on the other side, reverse flow occurs, resulting in reverse osmosis the process.

reverse osmosis Pure water equipment all use this technology, with intelligent control of automatic water supply and water cut-off, which is pure water equipment.

Reverse osmosis technology has gained increasingly widespread application due to its special advantages. Reverse osmosis water purification equipment cleaning issues may cause losses for many users with weak technical capabilities, so good management of reverse osmosis equipment can avoid serious problems.

Low-pressure rinsing of reverse osmosis equipment

Regular high-flow, low-pressure, low-pH rinsing of reverse osmosis equipment helps remove fouling attached to the membrane surface, maintaining membrane performance. Or when the reverse osmosis equipment feed water SDI suddenly rises above 5.5, low-pressure rinsing should be performed, and the machine should be restarted after the SDI value is adjusted to the qualified level.

Reverse osmosis equipment shutdown protection

Due to production fluctuations, reverse osmosis equipment inevitably needs frequent shutdown. Protective measures must be taken during short-term or long-term shutdown; improper handling will lead to irreversible decline in membrane performance.

Short-term storage is suitable for systems shut down for less than 15 days. Low-pressure rinsing every 1-3 days can be used to protect the reverse osmosis equipment. Practice has shown that when the water temperature is above 20℃, the water in the reverse osmosis equipment will become smelly and deteriorate after 3 days, with a large number of bacteria breeding. Therefore, it is recommended to perform low-pressure rinsing every 2 or 1 day when the water temperature is above 20℃, and every 3 days when the water temperature is below 20℃. After each rinsing, the water purification equipment should be turned off. reverse osmosis device all inlet and outlet valves.

Long-term shutdown protection is suitable for systems shut down for more than 15 days. At this time, the protective solution ( bactericide ) must be filled into the water purification equipment reverse osmosis device for protection. Commonly used bactericide formula ( composite membrane ) is formaldehyde 10 (mass fraction), isothiazolinone 20mg/L, sodium bisulfite 1 (mass fraction).

Chemical cleaning of reverse osmosis membrane

Under normal operating conditions, reverse osmosis membrane it may also be polluted by inorganic scale, colloids, microorganisms, metal oxides etc. These substances deposited on the membrane surface will cause the water purification equipment reverse osmosis device output to decrease or salt rejection rate to decrease, pressure difference to increase, or even cause irreversible damage to the membrane. Therefore, in order to restore good water permeability and desalination performance, chemical cleaning of the membrane is required.

Generally, cleaning is required every 3 to 12 months. If monthly cleaning is necessary, it indicates a need to improve the pretreatment system and adjust operating parameters. If cleaning is needed every 1 to 3 months, the equipment's operating level needs improvement; whether the pretreatment system requires improvement is harder to determine.