500LPH Frist Stage RO Filter System Drinking Water Treatment Plant
 
Reverse Osmosis (Reverse Osmosis, short for RO) is a high membrane separation technology with pressure difference as driving force, which has the characteristics of high separation degree, no phase change, simple and efficient. The "pore size" of the RO membrane has been as small as nanometers (1nm=10-9m), and no "filter" holes on the surface can be seen under SEM. Under the operating pressure higher than the osmotic pressure of raw water, water molecules can reverse osmosis through the RO semi-permeable membrane to produce pure water, and a large number of inorganic ions, organic matter, colloids, microorganisms, pyrogen in the raw water are intercepted by the RO membrane.
 
Technical Specifications of RO Water Treatment System

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Usually, when the conductivity of raw water is less than 200μS/cm, the conductivity of primary RO pure water is less than 5μs/cm, which is in line with the laboratory grade 3 water standard. For areas with high raw water conductivity, in order to save the subsequent replacement cost of mixed bed ion exchange resin and improve the quality of pure water, customers can consider choosing the two-stage reverse osmosis purification system. The two-stage RO pure water conductivity is about 1-5 μS/cm, which is related to the raw water quality. The principle of reverse osmosis: The same volume of dilute solution (such as fresh water) and concentrated solution (such as sea water or salt water) are placed on both sides of a container, with semi-permeable membrane barrier in the middle. The solvent in dilute solution will naturally pass through the semi-permeable membrane and flow to the concentrated solution side. The liquid level of the concentrated solution side will be higher than that of the dilute solution, forming a pressure difference and reaching the osmotic equilibrium state. The pressure difference is the osmotic pressure. The osmotic pressure depends on the type of the concentrated liquid. The concentration and temperature are independent of the properties of the semi-permeable film. If a pressure greater than the osmotic pressure is applied on the side of the concentrated solution, the solvent in the concentrated solution will flow to the dilute solution, the direction of flow of the solvent and the original direction of penetration, this process is called reverse osmosis.
 
A positively charged reverse osmosis membrane
 
Now widely used low pressure, ultra-low pressure composite film material are aromatic polyamide, the membrane surface are negative charge, there are membrane manufacturers have developed a surface with positive charge low pressure composite film, this film is mainly used in the preparation of high resistivity high pure water system, in Japan, The positive charge film ES10C produced by Nitto Denko has achieved high pure water resistivity of 10 ~ 15 megohm in the three-stage reverse osmosis system in the semiconductor industry, and the final water resistivity of the three-stage reverse osmosis system produced by Hyundai Electronics in Korea is 8 ~ 9 megohm. A 170 t/h three-stage reverse osmosis system in a semiconductor factory in Shanghai also reached the above targets. In addition, the resistivity of water produced by reverse osmosis is 1 ~ 4 megohm in the two-stage reverse osmosis system of the scale of 5 ~ 20 tons/hour in some domestic pharmaceutical factories. In 2000, the domestic pharmaceutical industry will put into production 20 sets of such reverse osmosis systems.
 
Process flow of RO Water Treatment System
Raw water → Raw water tank → Raw water pump → Multi-media filter (quartz sand filter) → Activated carbon filter → Soft water processor → Precision filter → High pressure pump → Primary reverse osmosis (RO) device → Purified water tank → High pressure pump → Two Stage reverse osmosis → ultraviolet sterilization device → water point.
 

 
Photos of reverse osmosis water treatment system

 

FAQ:
 
1. What is the design water yield of ro membrane element? (except anti-pollution membrane and seawater desalination membrane)
 
Model 4040 is designed by 0.25m3/h
 
Model 8040 is designed by 1-1.2m3/h
 
2. What is the material of mechanical filter?
 
Carbon steel, stainless steel, fiberglass
 
3.What are the multi-way control valves?
 
Manual control valve, automatic control valve
 
Multi - way control valve is divided into: filter valve and softening valve
 
Automatic control valve is divided into: time type and flow type.
 
Multi-way control valve brands are: FLECK, AUTOTROL, Runxin, clean source, etc.