1, coarse filter

Coarse filtration: refers to mechanical filtration, removal of suspended solids, colloid, turbidity, color, odor, etc. The main filtration methods are clarifier, fast filter, sand filter, sand filter, multi-media filter, activated carbon filter, disc filter, fiber filter and so on.

2, fine filter

Precision filter: filter film made of special materials, high precision filter. Common for microfiltration membrane and filter element filtration.

3, over filtration

Overfiltration: is a membrane filtration to remove macromolecules and colloid, bacteria, etc. High filtration accuracy, common is ultrafiltration membrane. Ultrafiltration membranes do not remove ions from water, that is, they have no desalting function. For reverse osmosis pretreatment or reverse osmosis after the fine treatment, can also be used alone. Ultrafiltration is a fluid tangential flow and pressure-driven filtration process that separates particles by molecular weight. Ultrafiltration membranes have pore sizes in the range of about 0.002-0.1 micron. Dissolved substances and substances smaller than membrane pore size can be used as permeable filtration membrane, and substances that cannot permeable filtration membrane can be concentrated in the discharge liquid. Thus the produced water contains water, dissolved solids and small molecular weight substances, while colloids, suspended particles, high molecular weight organic matter, bacteria, viruses and protozoa will be filtered out.

4. Reverse osmosis

Reverse osmosis: reverse osmosis RO for short, is the '60 s developed a kind of membrane separation technology, its principle is under the action of raw water under high pressure through the reverse osmosis membrane, the solvent diffusion from high to low concentration in the water so as to achieve the purpose of the separation, purification, concentration, due to its penetration in the opposite direction with nature, so it is called reverse osmosis. Reverse osmosis can remove bacteria, viruses, colloid, organic matter and more than 98 percent of dissolved salts from water. This method has the characteristics of low operation cost, simple operation, high degree of automation and stable effluent quality. Compared with other traditional water treatment methods, it has obvious advantages and is widely used in all walks of life related to water treatment. Reverse osmosis water treatment process basically belongs to the physical desalination method, which has many excellent characteristics that the traditional water treatment method does not have:
A, reverse osmosis is at room temperature, the use of no phase change physical method to salt water for desalination, purification. At present, the salt removal rate of ultra-thin composite membrane element can reach more than 99.5%, and can simultaneously remove colloids, organic matter, bacteria, viruses and so on.
B. Water treatment relies only on water pressure as a driving force, and its energy consumption is low among many treatment methods.
C, without a lot of chemical agents and acid, alkali regeneration treatment, no chemical waste liquid discharge, no environmental pollution.
D, reverse osmosis device can be continuously operated to make water, the system is simple, easy to operate, the product water quality is stable.
E. The reverse osmosis device has a high degree of automation, with little workload of operation and maintenance.
F. The equipment occupies a small area and requires small space.
G, suitable for a large range of raw water quality, not only suitable for brackish water, sea water and sewage treatment, but also suitable for low salt content of fresh water treatment. Our company has many years of experience in process design, equipment manufacturing, complete system and membrane application technology of industrial water treatment system, and selects reasonable process setting and design parameters to ensure long-term stable operation of equipment.

5. Ion exchange

All kinds of inorganic salts in water ionize to generate Yang and anion, through the hydrogen ion exchanger layer, the cation in water is replaced by hydrogen ion, which is the principle of removing salt from the Yang bed.
All kinds of inorganic salts in water ionize to generate positive and anion, through OH- type ion exchanger layer, the anion in water is replaced by OH- ion, which is the principle of Yin bed salt removal.
Mixed bed is an ion exchange device in which positive anion exchange resin and anion exchange resin are mixed and filled in the same exchange column in a certain proportion. Uniformly mixed resin layer, positive resin and negative resin closely staggered arrangement, each pair of positive resin and negative resin particles similar to a group of compound bed, so the mixed bed can be regarded as countless groups of compound bed in series operation. Because after ion exchange in the water by mixing hydrogen ion and hydroxide ion immediately generates low degree of ionization of water molecules, less likely to form the cation or anion exchange of ions, can make the exchange reaction very thoroughly, and mixed bed effluent water quality is better than that of Yang, anion exchange series of double bed can achieve water quality, It can produce water with high purity.

6, EDI

EDI: EDI technology is the combination of electrodialysis and ion exchange in desalting new process, the equipment take the electrodialysis and mixed bed ion exchange of both long, make up for the short of the other side, can use ion exchange to do in-depth treatment, and no reagent for regeneration, using ionization produced by H+ and OH-, to achieve the purpose of resin regeneration. EDI has higher requirements for inlet water, which must be reverse osmosis or equivalent to reverse osmosis water quality. It has the following characteristics:
It can continuously produce qualified ultrapure water that meets the requirements of users, with stable water production.
No chemicals for regeneration, no chemical emissions, a green product.
Compact structure, small footprint, low cost of water production.
Device debugging is completed before delivery, simple installation and debugging on site.
Simple operation, low labor intensity, easy training.