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Water treatment EDI

  • Water treatment EDI

Basic Information

Ultra pure water EDI equipment

EDI (also known as continuous electric desalination technology it is scientific integration of electrodialysis technology and ion exchange technology through the yang, anion membrane on the cation, anion through the role of the role of ion exchange resin and water exchange of ions in the electric field To achieve the directional migration of ions in water, so as to achieve the depth of water purification desalination, and water electrolysis generated by hydrogen ions and hydroxide ions on the continuous regeneration of the loading resin, so the process of EDI water does not require acid, alkali chemistry It has the advantages of advanced technology, compact structure and simple operation. It can be widely used in electric power, electronics, medicine, chemical industry, food and laboratory field, and it is the green of water treatment technology revolution.

EDI working principle

EDI is an advanced technology of electrodialysis technology and ion exchange technology. The system can exchange the ions through the anion and cation exchange membrane on the selective interaction of the cathode and the cation with the ion exchange resin. In the DC electric field The system can achieve the continuous regeneration of the resin, the need for downtime to use acid-base recycled resin, which can continuously prepare high-quality pure water.

Mixed bed, is the yin and yang resin according to a certain proportion of equipment to fill in the same switch, run it before he mix evenly. At this time, the treated water passes through the mixed ion exchange bed, and the generated hydrogen ions and the hydroxide ions immediately generate water with a low solubility. As a process terminal ultra-purification device, the terminal effluent resistivity can be increased to 15MΩ.cm above, to meet the needs of users of high quality water.

 

1, The water quality has the best stability.
2, Can continue to produce in line with user requirements of ultra-pure water.
3, Modular production, and can achieve automatic control.
4, No acid and alkali regeneration, no sewage discharge.
5, Will not be shut down due to regeneration.
6, No renewable equipment and chemical storage and transportation.
7, Equipment with compact structure, small footprint.
8, Low operating costs and maintenance costs.
9,Operation is simple, low labor intensity.


Application areas:

1,Electronics industry water
2,Pharmaceutical industry water
3,Chemical industry process water
4,Food industry water
5,Electric Power industry water

Performance feature

1, reverse osmosis device small size, simple operation, wide range of applications.
2, the choice of DOW film, a single desalination rate ≧ 99%, machine desalination rate ≧ 97%, you can remove 98% of organic matter, colloid, bacteria, etc..
3, water conductivity, one stage reverse osmosis ≦ 10μs / cm, two stage reverse osmosis ≦ 2.5μs / cm, EDI ≦ 0.5μs / cm.
4, IC program automatically run, automatic water, cleaning, conductivity online display, memory storage printing.
5,90% of the components using internationally renowned brands, the overall performance.

Process design:

1, Raw water conductivity ≤ 300μS / cm, at water temperature 25 º C case, the water quality ≤ 2μS / cm
2, TOC ≤ 500 ppb
3, Nitrate (%) ≤ 0.000006
4, Heavy metals (%) ≤ 0.00001
5, Operation mode of operation: manual / automatic operation, stainless steel pipe;
(RO membrane shell, water tank, valve, water pump, instrument) with the health level 304 stainless steel, the inner surface of the material, the use of 304 stainless steel, After mechanical polishing Ra 0.6μm or so;
6, All stainless steel pipes in direct contact with purified water are welded or connected to TC according to ISO 2852. No larger than 3D blind pipe is available in pipe. Pipe connection is carried out according to approved standard operating procedures for cutting, welding, slope mounting, , Degreasing, pickling, passivation.

Technical Parameters

Model

Capacity(T/H)

Power (KW)

Recovery rate (%)

One stage finished water conductivity (μs/cm)

Two stage finished water conductivity (μs/cm)

EDI system finished water conductivity (μs/cm)

Raw water conductivity (μs/cm)

RO-500

0.5

0.75

55-75

 

 

 

 

≤10

 

 

 

 

2-3

 

 

 

 

≤0.5

 

 

 

 

≤300

RO-1000

1.0

2.2

55-75

RO-2000

2.0

4.0

55-75

RO-3000

3.0

5.5

55-75

RO-5000

5.0

7.5

55-75

RO-6000

6.0

7.5

55-75

RO-10000

10.0

11

55-75

RO-20000

20.0

15

55-75

 

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