RO reverse osmosis water treatment technology standard process process

RO reverse osmosis water treatment technology standard process process

Reverse osmosis is also known as reverse osmosis. A membrane separation operation that is separated from the pressure difference and isolated from the solution from the solution. Because it is opposite to the direction of natural penetration, it is called reverse osmosis. According to the different osmotic pressure of various materials, the reverse osmosis pressure greater than the osmotic pressure can be used, that is, the reverse osmosis method, to achieve the purpose of separation, extraction, purification and concentration.


Preparation principle

Reverse osmosis water treatment equipment is usually composed of three parts: raw water treatment system, reverse osmosis purification system, and super purification treatment system. The purpose of the pre -treatment is mainly to enable the water inlet requirements of the raw water to the reverse osmosis membrane separation component to ensure the stable operation of the reverse osmosis and purification system. The reverse osmosis membrane system is the most economical and efficient way to remove more than 98%of ions, organic matter and 100%microorganisms (theoretically) in one -time removal of raw water. The hyper -purified processing system further removes trace ions and organic substances such as trace ions and organic substances in the reverse osmosis pure water through a variety of integrated technologies to meet the final water quality index requirements of different purposes.

working principle

Reverse osmosis is the most precise membrane liquid separation technology. Applying operation pressure on the side of the water (thick solution) side to overcome natural osmotic pressure. When the operating pressure of the natural penetration pressure is added to the side of the thick solution The direction will be reversed, and the water molecules in the water inlet (thick solution) will become a purified water on the side of the dilute solution through the reverse osmosis membrane; the reverse osmosis equipment can prevent all the dissolved salt and the amount of molecular weight greater than 100, but allow water molecules to allow water molecules Through, the dehydration rate of reverse osmosis composite membrane is generally greater than 98%. They are widely used in industrial pure water and electronic ultra -pure water preparation, drinking pure water production, boiler to water, etc. The volume of water and waste water.

Pre -processing

The pre -processing system of reverse osmosis water treatment equipment is usually composed of polypropylene fiber (PP) filters and activated carbon (AC) filters. For raw water with high hardness, a soft resin filter is also needed. PP filter element can efficiently remove pollutants such as mechanical particles impurities, rust and large colloidal substances in raw water to protect the subsequent filters. It is characterized by a large amount of pollution and low price. AC activated carbon filter element can efficiently adsorb the residual chlorine and part of the organic matter and colloid in raw water to protect the polyamide reverse osmosis composite membrane from oxidation. Sofele resin can remove most of the calcium and magnesium ions in raw water, prevent subsequent RO membrane surfaces from blocking and blocking, and improve the recovery rate of water.

Reverse osmosis


Reverse OSMOSIS (RO) is a high -tech film separation technology that uses pressure difference as a driving force, which has a highly separated, non -phase change, and simple and efficient feature. The reverse osmosis membrane “Pole diameter” is as small as nano (1 nm = 10-9m), and no “filter” small hole can be seen under the scan electron microscope. Under the pressure of the operation of the raw water osmotic pressure, the water molecules can reverse osmosis through the RO semi -permeable membrane and produce pure water, and a large amount of inorganic ions, organic matter, colloidity, microorganisms, and thermal originals in the raw water are cut off.

Generally, when the original hydration is <200 μs/cm, the guidance rate of the first -level RO pure water and electricity is ≤5 μs/cm, which meets the laboratory three -level water standard. For areas with high water and electricity guidance rates, in order to save follow -up costs for subsequent mixed -bed ion exchange resin replacement costs and improve pure water quality, customers can consider choosing a secondary reverse osmosis and purification system. The original water quality is related. The principle of reverse osmosis: Put the scarcity solution of the same volume (such as freshwater) and thick liquid (such as seawater or saline) on both sides of the container, and use a semi -transmitting membrane block in the middle. Excessive diaphragm and flow to the side of the thick solution. The liquid surface of the thick solution side will be higher than the liquid surface of the dilute solution to form a pressure difference to achieve a state of penetration. This pressure difference is The type, concentration and temperature of the thick liquid have nothing to do with the nature of the semi -diaphragm. If a pressure greater than the penetration pressure is applied on the side of the thick solution, the solvent in the thick solution flows to the dilute solution. The flow direction of this solvent is opposite to the original penetration direction. This process is called reverse osmosis.

After the reverse osmosis is generally tap water or groundwater through the first -level reverse osmosis and water treatment equipment, the hydrophobic conductivity is <10μs/cm. After the second -level reverse osmosis water treatment equipment The water treatment equipment system is supplemented with ion exchange equipment or EDI equipment to prepare ultra -pure water to make the resistivity reach 18 trillion ohm (conductivity = 1/resistance) Frequent water) is separated by reverse osmosis membrane (a semi -diaphragm). It is opposite to the direction of the infiltration. It can be used to separate, purify and concentrate the solution of the reverse osmosis method greater than the osmotic pressure. The main separation object of reverse osmosis membrane is the ion range in the solution.


The standard process process is as follows:

Well water (tap water) → original water tank → raw pump → sand filter → activated carbon filtration → fully automatic soft water equipment → security filter → reverse osmosis host → pure water tank

1 original water tank

This device prevents the water from the pressure pump directly from extracting the pipe network due to insufficient flow and unstable pressure. The pressure increase pump or affects the normal operation of the system. Large devices must be set with water inlet dish valve.

1) The role of the floating ball valve is to control the amount of water in the water, which can be replenished in time when the system is running.

2)液位传感器有中水位和低水位,作用是控制增压泵的启动和停止;当水箱水位处于中水位以上时,增压泵才能自动启动;当水箱水位低于低水位时,增压The pump stops automatically.

2 Original pump

In order to ensure the constant water supply and pressure of the system, the system raw water pressure pressure pump can select imported brands, exempt machine sealing pumps, high efficiency, low noise, stable performance and reliable performance. Or choose a well-known domestic brand-Lingxiao Pump, New Jie Pump, etc. The original water pump is controlled by the original water tank water level.

3 Pre -processing (also known as previous processing)

At present, we often have three types: stainless steel filters, glass steel filters, and carbon steel lining filters. Pre -processing filtration is divided into three parts: multi -media filtration, iron -removing iron manganese device, activated carbon filtration and softening filtering; the American Abutu multi -road valve comes from the controller of the controller to perform the filter material in the filter tank at the set time. Counter -rushing and rinse; or use manual operation control.

Before refining the water, preliminary treatment is carried out in advance to achieve good results during water treatment and improve water quality. Because water in nature has a large amount of impurities, such as sediment, clay, organic matter, microorganisms, mechanical impurities, etc., the existence of these impurities seriously affects the water quality and treatment effect of refined water. Therefore Except, this requires pre -processing.

1) Multi -media filter (also known as mechanical filter)

The multi -media filter is mainly used to remove suspension, sediment and granular impurities in water.

The main fillers are: quartz sand, smoke -free coal, fiber ball, etc.


3) Active carbon filter

The active carbon filter is equipped with granular water purification active carbon, which mainly removes the macromolecular organic matter, colloid, odor, residual chlorine and other impurities in the water. Its corruption power is strong and can be removed by more than 90 %. Among them, residual chlorine is a strong oxidant, which must be limited to ≤ 0.1 mg/L.

Activated charcoal has three types: round charcoal, irregular fruit shell charcoal and coconut shell charcoal.

4) Cationu resin soft agent

The principle of sodium ion exchanges softening: The original water is exchanged through the sodium cation to exchange resin, so that the hardness component CA2+, MG2+in the water exchange with NA2+ions in the resin, thereby adsorbing the CA2+and MG2+in the water to soften the water.

Function: It has positive significance to prevent the surface of the reverse osmosis membrane, improve the life of the reverse osmosis, and the processing effect. Therefore, the softness is configured in the system. When the total hardness is less than 200 mg/LCACO3, there is no need for a soft agent. Its control method is best to use automatic control.

Quality product recommendation: RO Booster Water Pump Water Purifier Pump Water Filter Pump Diaphragm Pump 803-75

Author: ArticleManager