Features of reverse osmosis technology and introduction to the composition of reverse osmosis water treatment system

Features of reverse osmosis technology

  • Under the condition of no phase change at room temperature, it can separate solute and water. It is suitable for the separation and concentration of heat-sensitive substances. Compared with the separation method with phase change, the energy consumption is lower.
  • Reverse osmosis membrane separation technology has a wide range of impurity removal.
  • High desalination rate and water reuse rate, which can intercept solutes with a particle size of several nanometers or more.
  • Use low pressure as the membrane separation power, so the separation device is simple, operation, maintenance and automatic control are simple, and the site is safe and hygienic.

Therefore, reverse osmosis water treatment technology is used in power plant boiler feed water treatment, ultrapure water treatment in the electronics and semiconductor industries, pure water treatment in the chemical and pharmaceutical industries, food, beverage, drinking water treatment, seawater, brackish water desalination, metallurgy, and light industry. It has been widely used in wastewater treatment industries such as electroplating and leather industries.

Composition of reverse osmosis water treatment system

Reverse osmosis equipment is a set of water treatment system organized around reverse osmosis membrane. A complete reverse osmosis system is composed of pretreatment part, reverse osmosis host (membrane filtration part), post treatment part and system cleaning part.

  1. Pretreatment is often composed of quartz sand filter device, activated carbon filter device, and precision filter device. The main purpose is to remove the sediment, rust, colloidal matter, suspended matter, pigment, peculiar smell, biochemical organic matter contained in the raw water, and reduce the water content. Hazardous substances such as residual ammonia value and pesticide pollution. If the content of calcium and magnesium ions in the raw water is high, it is necessary to add a water softener. The main purpose is to protect the reverse osmosis membrane of the subsequent stage from damage by large particles, thereby prolonging the service life of the reverse osmosis membrane.
  2. the reverse osmosis host is mainly composed of a booster pump, a membrane shell, a reverse osmosis membrane, a control circuit, etc. It is the core part of the entire water treatment system, and the quality of the produced water mainly depends on this part. As long as the membrane model and booster pump model are selected properly, the reverse osmosis host can achieve more than 99% of the salt in the water, and the conductivity of the effluent can be guaranteed within 10us/cm (25 degrees).
  3. The post-treatment part is mainly for the further treatment of pure water taken from the main mechanism of reverse osmosis. If the subsequent process is connected to ion exchange or electrodeionization (EDI) equipment, industrial ultrapure water can be produced, if it is used in In the process of direct drinking water for civilian use, it is often connected to a post-sterilization device, such as a paper-outline sterilization lamp or an ozone generator, so that the water can be directly drunk.
  4. In order to ensure the normal operation of the reverse osmosis system and prolong the service life of the reverse osmosis membrane elements, when the reverse osmosis system runs for a period of time, it will remove calcium carbonate scale, metal oxide scale in water, and biological growth (bacteria, fungi, molds, etc.) Wait for the material to clean the system.
RO-water Filtration with CIP system

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