Reverse Osmosis Drinking Water Treatment System RO Purification Plant

Technical description of Drinking Water RO System:

Drinking water ro system is a spiral-wound structure, referred to as a roll-type structure. It consists of multi-leaf film bags, each leaf film bag is composed of two film sheets with opposite sides of the film, a product water flow channel placed between the two film sheets and a turbulent grid-shaped water inlet flow channel placed on the membrane surface. The three sides of the film bag are sealed with adhesive, and the fourth side is opened on the perforated water collection pipe.

Characteristics of Drinking Water RO System:

Reverse osmosis method can remove more than 90 % of soluble salts and 99 % of colloidal microorganisms and organic matter from water. Especially the brackish water purification plant by reverse osmosis powered by wind and solar energy is an economical and reliable way to solve the water problem of people in areas without electricity and short of conventional energy. Reverse osmosis desalination is not only suitable for seawater desalination, but also for brackish water desalination. Of the existing desalination methods, reverse osmosis desalination is the most economical, it has even exceeded the electrodialysis desalination. As the driving force of 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 reverse osmosis separation process is low. In existing seawater and brackish water desalination, reverse osmosis is the most energy saving. Reverse osmosis membrane separation is characterized by its "broad spectrum" separation, that is, it can not only remove all kinds of ions in the water, but also can remove particles larger than the ions, such as most of the organic matter, colloid, virus, bacteria, suspended matter, so reverse osmosis separation method is also known as broad spectrum separation.

Technical specifications of Drinking Water RO System:

Drinking Water RO Systemwork flow chart:

raw water → pretreatment system → high-pressure pump → reverse osmosis membrane assembly → purified water.

The pretreatment system according to the condition of raw water quality and water requirements Can take the coarse filter, activated carbon adsorption, fine filtration, precision filtration is necessary, in order to protect the reverse osmosis membrane, prolong the service life of, in addition, the composite film is sensitive to the free chlorine in the water, and thus are usually equipped with activated carbon adsorption pretreatment system.

Composition of Drinking Water RO System:

Reverse osmosis water treatment system generally includes pretreatment system, reverse osmosis device, post-treatment system, cleaning system and electrical control system.

1, the pretreatment system generally includes the original 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 to meet the requirements of reverse osmosis inlet water.

2. Reverse osmosis device mainly consists of multistage high pressure pump, reverse osmosis membrane element, membrane shell (pressure vessel), bracket and so on. Its main function is to remove impurities in water, so that the water meets the requirements of use.

3. Post-treatment system is an additional configuration in the case that reverse osmosis cannot meet the requirements of outlet water. Mainly including negative bed, positive bed, mixed bed, sterilization, ultrafiltration and other one or more of the equipment.

4, cleaning system is mainly composed of cleaning water tank, cleaning water pump, precision filter. When the reverse osmosis system is polluted and the effluent index cannot meet the requirements, it is necessary to clean the reverse osmosis system to restore its efficacy.

5. Electrical control system is used to control the normal operation of the whole reverse osmosis system. Including instrument panel, control panel, all kinds of electrical protection, electrical control cabinet, etc.

Basic principle of Drinking Water RO System:

The same volume of dilute solution (e.g., water) and thick liquid (such as sea water or salt water), respectively, on both sides of the container, separated by a semipermeable membrane, dilute solution of the solvent nature through a semipermeable membrane, flowing the concentrated solution side, the side of the strong solution liquid level than the dilute solution of liquid level above a certain height, and form a pressure difference, achieve osmotic balance state, this pressure difference is the osmotic pressure, The osmotic pressure depends on the type, concentration and temperature of the concentrated solution, and is independent of the properties of the semi-permeable membrane. If a pressure greater than osmotic pressure is applied on the side of the concentrated solution, the solvent in the concentrated solution will flow to the dilute solution, and the flow direction of the solvent is opposite to the direction of the original infiltration. This process is called reverse osmosis.

Development history of Drinking Water RO System:

Reverse osmosis is a water purification system developed with U.S. government assistance in the 1950s. It was used for desalination in the 1960s. In 1981, the United States used pure water made by reverse osmosis as circulating drinking water for astronauts, so pure water treated by reverse osmosis is also called space water. The advantages of using reverse osmosis method to manufacture pure water are high desalination rate, large water yield, less consumption of chemical reagents, low labor intensity, stable water quality, long life of ion exchange resin, long life of terminal filter. Reverse osmosis technology will be the most effective and critical water treatment method in the next 20 years.

FAQ:

1, What are the inlet water quality requirements for ro water treatment system membrane components?

2. What is the material of ro water treatment system membrane?

Acetate membrane (CA) : mainly because of its resistance to chlorine, so it is still durable. But its suitable pH range is small, easy hydrolysis

Aromatic polyamide membrane (PA) : water almost can not have chlorine, only through a variety of pretreatment chlorine.

3. RO water treatment system configuration:

First-stage multi-stage process: if the recovery rate is not achieved in the first stage (50-65% in the first stage and 65-75% in the second stage), the multi-stage tandem filtration can be used. The effective cross-sectional area of each segment decreases. 2:2 and 2:3 and 4:2:1

Multi-stage process: when the first stage process cannot meet the effluent quality requirements (the first stage is generally ≤20μs/cm), the product water of the first stage process is sent to another reverse osmosis unit.

The arrangement of membrane components can be divided into series and parallel.