1. Introduction to reverse osmosis equipment:

Reverse osmosis equipment is used to filter raw water through fine filters, granular activated carbon filters, compressed activated carbon filters, etc., and then pressurize it through a pump. It uses a reverse osmosis membrane (RO membrane) with a pore size of 1/10000 μ m (equivalent to 1/6000 the size of Escherichia coli and 1/300 the size of a virus) to convert high concentration water into low concentration water. At the same time, it isolates industrial pollutants, heavy metals, bacteria, viruses, and other impurities mixed into the water, thereby achieving the physical and chemical indicators and hygiene standards specified for drinking. It is the choice for the human body to replenish water in a timely manner So people call this type of water production machine a reverse osmosis purified water machine.

Reverse osmosis is a modern and novel technology for treating pure water. By using reverse osmosis components to improve the purity of water and remove impurities and salts from the water. The purified water we drink in our daily lives is treated with reverse osmosis equipment, resulting in clear water quality.

The country in the world that uses reverse osmosis technology is the United States, which invented membrane separation technology powered by power difference. With the promotion of this technology, China has begun to use reverse osmosis technology. The purified water equipment on the market adopts reverse osmosis membrane treatment technology, and has undergone certain improvements and design innovations in China. The technology is already very mature.

A reverse osmosis membrane has been designed in the reverse osmosis purified water equipment. The pressure on both sides of the membrane is different. With the pressure on both sides as the driving force, the raw water is compressed through the reverse osmosis membrane. The salt with lower concentration will permeate towards the salt with higher concentration. The equilibrium state that can be achieved is the osmotic pressure of the liquid. When the pressure on one side of the saltwater is opposite to the osmotic pressure on the other side, a reverse flow occurs, resulting in a reverse osmosis process.

The reverse osmosis purified water equipment adopts this technology and adopts intelligent control of automatic water supply and cut-off, which is the purified water equipment

2. System composition:

Pre treatment: generally includes raw water pump, dosing device, quartz sand filter, activated carbon filter, precision filter, etc. Its main function is to reduce the pollution index of raw water and other impurities such as residual chlorine, in order to meet the inlet requirements of reverse osmosis. The equipment configuration of the pretreatment system should be determined according to the specific situation of the raw water.

Reverse osmosis: mainly composed of multi-stage high-pressure pumps, reverse osmosis membrane components, membrane shells (pressure vessels), brackets, etc. Its main function is to remove impurities from water and make the effluent meet the requirements for use.

Cleaning: It mainly consists of cleaning water tanks, cleaning water pumps, and precision filters. When the reverse osmosis system is contaminated and the effluent indicators cannot meet the requirements, it is necessary to clean the reverse osmosis system to restore its effectiveness.

Electrical control: It is used to control the normal operation of the entire reverse osmosis system. Including instrument panel, control panel, various electrical protections, electrical control cabinet, etc.

3. Process flow:

Raw water tank: stores raw water for settling large sediment particles and other precipitable substances in the water. Simultaneously buffering the impact of unstable water pressure in the original water pipe on the water treatment system. (such as pressure sensing reactions caused by low or high water pressure).

Raw water pump: Constant system water supply pressure, stable water supply volume.

Multi media filter: a filter that uses multiple filtration layers, mainly aimed at removing substances such as sediment, rust, colloidal substances, suspended solids, etc. with particles above 20um in raw water. It can be controlled by manual valves or fully automatic controllers for a series of operations such as backwashing and forward flushing. Ensure the quality of water produced by the equipment and extend its service life.

Activated carbon filter: The system uses a fruit shell activated carbon filter, which can not only adsorb electrolyte ions but also perform ion exchange adsorption. Activated carbon adsorption can also reduce the oxygen demand (COD) of potassium permanganate from 15mg/L (O2) to 2-7mg/L (O2). In addition, due to the adsorption effect, the concentration of adsorbed and replicated on the surface increases, thus playing a catalytic role, removing pigments, odors, a large amount of biochemical organic compounds, reducing the residual chlorine value and pesticide pollutants in water, and removing trihalides (THM) and other pollutants from water. At the same time, the equipment has a self maintenance system and low operating costs.

Ionic softening system/dosing system: In order to dissolve solid substances in concentrated discharge and utilize fresh water, the R/O device should prevent the concentration product of CaCO3, MgCO3, MgSO4, CaSO4, BaSO4, SrSO4, SiSO4 on the concentrated water side, especially the last membrane component of the RO device, from exceeding its equilibrium solubility constant and crystallizing, damaging the proper characteristics of the membrane components. Before entering the reverse osmosis membrane component, an ion softening device or an appropriate amount of scale inhibitor should be used to prevent carbonate from forming, SiO2， The precipitation of sulfate crystals

Precision filter: A precision filter is used to remove suspended solids, non straight particles, colloids, and other substances remaining in the inlet water, making subsequent equipment such as the RO system operate more safely and reliably. The filter element is a 5um melt blown filter element, which aims to remove impurities larger than 5um that are missed by the upper filtration unit. Prevent it from entering the reverse osmosis device and damaging the surface of the membrane, thereby damaging the desalination performance of the membrane.

Reverse osmosis system: The reverse osmosis device uses sufficient pressure to separate the solvent (usually water) in the solution through a reverse osmosis membrane (or semi permeable membrane), which is called reverse osmosis because this process is opposite to the direction of natural osmosis. The reverse osmosis method can adapt to various types of raw water with high salt content, especially in water treatment projects with high salt content, and can achieve good technical and economic benefits. The desalination rate of reverse osmosis is improved, the recovery rate is high, the operation is stable, the footprint is small, and the operation is simple. The reverse osmosis equipment not only removes salt, but also removes most bacteria, colloids, and high molecular weight organic matter.

Ozone sterilizer/UV sterilizer (optional): kills bacteria generated by secondary pollution thoroughly to ensure the hygiene indicators of finished water

Raw water → Raw water tank → Raw water pump → Multi medium filter (quartz sand filter) → Activated carbon filter → Soft water processor (with scale inhibitor device added) → Precision filter → High pressure pump → Primary reverse osmosis (RO) device → Ultraviolet sterilization device (ozone sterilization device) → Water point

4. Main purpose

1. Manufacturing electronic industrial products such as cathode ray tube glass shells, cathode ray tubes, liquid crystal displays, circuit boards, computer hard drives, and integrated circuits? Pure water and high-purity water required for processes such as chips and monocrystalline silicon semiconductors;

2. To produce softened water and desalinated pure water required for heating and thermal power generation boilers, as well as for low-pressure boiler feedwater in factories and mining enterprises;

3. Prepare medical infusion solutions, injections, pharmaceuticals, biochemical products, sterile water for medical use, and pure water for artificial kidney dialysis required by the pharmaceutical industry;

4. To produce pure drinking water, distilled water, mineral water, alcohol brewing water, and pure water for blending in the beverage (including alcoholic beverages) industry;

5. Producing domestic and drinking water from seawater and brackish water;

⒍ Preparation of deionized water for electroplating process; Pure water for battery production process; Automobiles, household appliances, building materials products

Surface coating and cleaning with turbid water; Pure water is used for coated glass; Dehydration and desalination water required for textile printing and dyeing processes;

7. Petrochemical industry such as chemical reaction cooling water; Is the manufacturing process of chemical agents, fertilizers, fine chemicals, and cosmetics pure? Water;

High quality water supply network systems for hotels, buildings, community airports, real estate properties, and water purification for swimming pools;

9. Treatment and reuse of wastewater from circuit boards, electroplating, and electronic industries;

Treatment of wastewater and leachate from domestic, hospital, leather, printing and dyeing, and paper industries;

5. Application areas:

Reverse osmosis membrane technology has been widely used in industries such as boiler feedwater for power plants, ultra pure water treatment in the electronics and semiconductor industries, pure water treatment in the chemical and pharmaceutical industries, wastewater treatment in food, beverage, drinking water treatment, seawater and brackish water desalination, metallurgy, light industry, electroplating, and leather industries.