Edi stack: CP-3600S
Pure water resistivity: above 15
Feed water: RO product water
Feed water TEA: less than 35ppm
Feed water PH: 6.0-9.0
Brand Name: CHIWATEC
Power: 1.1KW, 380V,50HZ,3phase
Packing Material: Wooden Case, stainless steel
Applicable Industries: Manufacturing Plant, Food & Beverage Factory, Retail, Food Shop, Construction works , Energy & Mining, Food & Beverage Shops
EDI ultrapure water treatment
1. Brief introduction of EDI ultrapure water treatment
EDI ultrapure water treatment by cation ion exchange membrane for Pharmaceutical factory high pure fresh water treatment EDI module project for chemical making fresh water. Electrodeionization (EDI) is a process that uses ion exchange resins to absorb ions from a dilute water stream and then transports the absorbed ions through ion-exchange membranes into a concentrate water stream under the influence of an applied electro field. Further more, the ions are removed continually on the direction of water flow. The conductivity value is get lower and lower. H+ and OH- are formed under the direct current to maintain the system current and regenerate the ion-exchange membrane. Thus to realize the continues and deep salt rejection. EDI system water treatment of ultrapure water for electric industrial use
2. Application of EDI ultrapure water treatment
EDI typically may be used in any applications that require ultra pure water at a resistivity above 1 M9·cm. The typical industries that use ultra pure water include
1). Microelectronic and semiconductor production.
2). Pharmaceutical and biomedical industries.
3). Chemical production.
4). High pressure boiler such as the ones in power plants.
3. EDI module advatages
Feed water hardness can be 10mg/l
Does not consume salts in operating and need much lower operating expenses.
Does not need to recycle the concentrate, which makes the system much simpler.
The EDI systems require a little energy.
4. Running condition for EDI ultrapure water treatment
The product water quality of EDI is depended on the operation condition. Which including system designing data, feed water quality, feed water pressure. etc.
The EDI unit is adopted CP-2000S EDI module, 2 pcs.
Unit module voltage range: 50-120V
Unit module current range: 0.5-6A
System product water flow rate: 2.00-4.00m3/r
System concentrate flow rate: 0.30-0.60m3/h
System electrolyte flow rate: 0.12m3/h
4.2 running current and voltage
Warning: the heat produced when current pass through EDI module must be take away by water. Thus, once EDI product and concentrate stream is blocked or stopped, the power should be cut off. Otherwise, EDI module will be burned thoroughly.
4.3 feed water requirement
1)feed water: RO product water
3) pH : 6.0-9.0
5)Feed water pressure<0.4Mpa
6) hardness<10.0 ppm.
7) organic glass matter<0.5 ppm.
8) CL2<0.05 ppm , O3<0.02 ppm.
5. EDI module introduction
5.1 Dilute chamber
Dilute chamber is the space for the dilute stream (product water) to pass
through. It is formed by a frame, one piece of anionic ion exchange membrane on one side of the frame and a piece of cationic ion exchange membrane on the other side of the frame. Inside the frame there is tightly packed with mixed ion exchange resins.
5.2 Concentrate chamber
Concentrate chamber is the space for the concentrate to pass through. It is
created by layers of two dilute chambers. It is also formed by anionic ion
exchange membrane, cationic ion exchange membrane and ion exchange
5.3 Electrolyte chamber
Electrolyte chamber is next to an anode and a catholyte chamber next to a cathode.
Isolation board and reinforcing plates.
Power and connections.
6. Main parts for EDI ultrapure water treatment
|liquid level switch||KEY-5||2||set|
|2||EDI feed pump||CR5-7||1||set|
|8||product flow meter||Z3005||1||pc|
|11||feed water conductivity meter||CCT3320||1||pc|
|12||product resistivity meter||RCT3200||1||pc|
|13||product water solenoid valve/ unqualified product solenoid valve||DN25||2||pc|
|14||feed water solenoid valve/ unqualified feed water solenoid valve||DN25||2||pc|
|17||eletrical control board||1||set|