The reverse osmosis equipment system is composed of high-pressure pumps, reverse osmosis membranes, pressure vessels, as well as corresponding instruments, surfaces, valves, frames, pipes and pipe fittings, etc. Reverse osmosis membranes are a new type of separation membrane driven by pressure. Under the push of pressure, water molecules in the solution pass through the membrane, while other molecules, ions, viruses, etc. are retained, thus achieving the purpose of purifying water. The pore size of the reverse osmosis membrane is less than1nmIt can effectively remove divalent ions, and the removal rate of monovalent ions can reach95-99%; The removal rate of low-molecular-weight organic substances can reach100%; It can effectively remove pathogenic microorganisms, various viruses and viruses. Make the water flow outAmesThe mutagenicity activity test was negative. The two-stage reverse osmosis system can remove water from the raw water99%The above-mentioned minerals, viruses, pyrogens and toxins, etc. Compared with cation and anion exchange beds, reverse osmosis equipment is simple to operate, has no acid or alkali regeneration pollution, and has lower working costs. These advantages have made reverse osmosis equipment gradually replace cation exchange beds nowadays.

　　Food·Beverage·Dairy products·Water systems for industries such as wine-making, hospitals, and electronics

　　I.Cleaning methods for reverse osmosis equipment

　　Reverse osmosis technology has been increasingly widely applied due to its exceptional superiority. The cleaning issues of reverse osmosis clear water equipment may cause many users with weak technical strength to suffer losses. Therefore, by doing a good job in the management of reverse osmosis equipment, serious problems can be avoided.

　　1.Low-pressure flushing of reverse osmosis equipment

　　Regularly perform high flow, low pressure and low pressure on the reverse osmosis equipmentＰｈThe flushing of the value is conducive to peeling off the dirt adhering to the membrane surface, maintaining the membrane function, or when the reverse osmosis equipment feeds waterＳＤＩSuddenly add transcendence5.5At the above times, low-pressure flushing should be carried out and waitＳＤＩTurn on the machine only after the value adjustment is qualified.

　　2.Reverse osmosis equipment shutdown protection

　　Due to the unstable production, reverse osmosis equipment is inevitably shut down frequently. When it is out of use for a short or long time, protective measures must be taken. Improper handling can lead to a decrease in membrane performance that cannot be restored.

　　Short-term retention applies to shutdown15ｄThe following systems can be selected from each1～3ｄThe method of low-pressure flushing is used to protect reverse osmosis equipment. During the internship, I found that the water temperature20℃At the above times, water is stored in the reverse osmosis equipment3ｄIt will stink and transform, and there will be many rebirths. Therefore, it is advocated that the water temperature is higher than20℃Every hour, every2ｄor1ｄLow-pressure flushing once, the water temperature is lower than20℃At that time, you can do it every time3ｄLow-pressure flushing should be carried out once. After each flushing, all inlet and outlet valves on the reverse osmosis equipment of the clear water equipment should be closed.

　　Long-term shutdown protection applies to shutdown15ｄFor the above-mentioned systems, it is necessary to use protective solution at this time(agent)Fill the clear water equipment and reverse osmosis equipment for protection. Common agent formulas(Composite film)For formaldehyde10(Mass fraction)Isothiazolinone20ｍｇ/ＬSodium bisulfite1(Mass fraction).

　　3.Chemical cleaning of reverse osmosis membranes

　　Under normal working conditions, reverse osmosis membranes may also be contaminated by inorganic scale, colloids, microorganisms, metal oxides, etc. The deposition of these substances on the membrane surface can cause a decrease in the output or desalination rate of the reverse osmosis equipment, as well as an increase in pressure difference, which can cause irreparable damage to the membrane. Therefore, in order to restore excellent water permeability and desalination performance, chemical cleaning of the membrane is required.

　　"General3～12It should be cleaned once a month. Assuming that it has to be cleaned once a month, this indicates that the pretreatment system should be improved and the working parameters adjusted. Hypothesis1～3If the equipment needs to be cleaned once a month, it is necessary to improve its working level. It is difficult to distinguish whether the pretreatment system needs to be improved.

　　Ii.Reverse osmosis water treatment technology basically belongs to physical desalination methods. It has many excellent features that traditional water treatment methods do not have:

　　1Reverse osmosis is a physical method that desalinates and purifies brine without phase change at room temperature. Nowadays, the desalination rate of ultra-thin composite membrane elements can be achieved99.5%The above can also be used to remove colloids, organic matter, viruses, etc. from water at the same time.

　　2The treatment of water relies solely on water pressure as the driving force, and its energy consumption is relatively low among many water treatment methods.

　　3Reverse osmosis can continuously produce water, has a simple system, is easy to operate, and the product water quality is stable.

　　4The reverse osmosis equipment has a high degree of automation, and the workload for operation protection and equipment protection is very small.

　　5The equipment occupies a small area and requires little space.

　　6It is suitable not only for the treatment of brackish water and seawater, but also for the treatment of fresh water with low salt content. Our company, drawing on years of experience in the technical design, equipment manufacturing, system integration and membrane application of industrial water treatment systems, selects reasonable technical Settings and design parameters to ensure the long-term stable operation of the equipment.

　　Iii.·The filtration principle of pure water production equipment: source water→ Source water pump→ Mechanical filter → Activated carbon filter → Precision filter →Reverse osmosis membrane

　　Mechanical filters used in pure water production equipment , Activated carbon filter , Precision filter , Selection of reverse osmosis membrane housing 304 Made of stainless steel , Stainless steel flange connection for membrane housing , Durable , Reliable quality .

　　The low-pressure switch protects the high-pressure pump from damage due to the interruption of water supply.

　　The high-pressure pump with high efficiency and low noise reduces working noise and power consumption.

　　The high desalination rate and low working pressure of the spiral wound composite membrane improve the quality of the produced water, reduce working costs, and have a long service life.

　　Flow meters are installed for both the product water and concentrated water to monitor and regulate the working water output and system recovery rate.

　　The product water conductivity meter continuously monitors the quality of the product water.

　　FourWorking parameters of reverse osmosis membranes

　　Desalination rate97%-99%

　　Organic matter removal rate>150MW

　　Rejection rate>99%

　　Pyrogen removal rate>99%

　　Particle removal rate>99%

　　Plea for water:

　　Pollution index SDI "<5

　　Residual chlorine<0.1mg/L

　　PH :5-8

　　Water temperature4° -40 ℃

　　It is applicable to pure water plants, water for company canteens and drinking water for employees. Domestic water supply and direct drinking water for mountain villas, villas and apartment buildings; Direct drinking water in residential areas and restaurants.

　　Single set Water production capacity 0.25m3/h---100m3/h