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The specific features and water treatment applications of EDI pure water equipment and EDI modules

Released Date: Sep 22,2016 Article Source: Yuanlai Water Treatment
The EDI equipment fills ion-exchange resin between the anion/cation exchange membranes to form an EDI unit. In the EDI component, a certain number of EDI units are separated by a mesh to form a concentrated water chamber. Positive and negative electrodes are also set at both ends of the unit group. Under the drive of direct current, the cations and anions in the fresh water flow pass through the cation and anion communication membranes respectively and enter the concentrated water chamber, where they are removed in the fresh water chamber. The water passing through the concentrated water chamber carries ions out of the system and turns them into concentrated water. EDI equipment generally uses reverse osmosis (RO) pure water as the feed water for EDI. The resistivity of RO pure water is generally 40-2μS/cm (at 25℃). The resistivity of EDI pure water can be as high as 18 MΩ.cm(at 25℃), but depending on the application of deionized water and the system equipment Settings, EDI pure water is suitable for preparing pure water with a resistivity requirement of 1-18.2MΩ.cm(at 25℃).

  EDIEquipmentAlso known as continuous electrodialysis technology, it scientifically integrates electrodialysis technology and ion communication technology. Through the selective permeation effect of cation and anion membranes on cations and anions and the communication effect of ion communication resins on ions in water, it completes the directional migration of ions in water under the effect of an electric field, and then achieves deep purification and desalination of water. And the filled resin is continuously regenerated through the hydrogen ions and hydroxide ions produced by water electrolysis, thusEDIThe water production process of the equipment can continuously produce high-quality water without the need for acid or alkali chemical regenerationUltra-pure waterIt has the advantages of advanced technology, compact structure and simple operation, and can be widely used in the fields of power, electronics, medicine, chemical engineering, food and laboratoriesWater treatmentThe green revolution of technology. This new technology can replace traditional ion communication devices and produce products with a resistivity as high as16-18MΩ·CMUltra-pure water.

  EDIIt is a new desalination technology that links electrodialysis and ion communication together. This technology employs electro-regenerating ion communication desalination technology to replace the traditional mixed ion communication desalination technologyDI. High desalination effect is achieved through ion-exchange resins and selective ion-exchange membranes. The combined technology with reverse osmosis enables the quality of the produced water to reach10~15MΩHigh desalination effect.EDIThe selection of standard component plans can be combined into different standard systems according to requirements.

  EDIThe equipment fills the ion communication resin in the cathode/The composition between cationic communication membranesEDIUnit.EDIThere will be a certain quantity in the componentEDIThe units are separated by a mesh to form concentrated water chambers. Negative cells were set up at both ends of the unit group again/Positive electrode. Under the drive of direct current, the cations and anions in the fresh water flow pass through the cation and anion communication membranes respectively and enter the concentrated water chamber, where they are removed in the fresh water chamber. The water passing through the concentrated water chamber carries ions out of the system and turns them into concentrated water.EDIThe equipment is generallyReverse osmosisRO"Pure water"AsEDIWater supply.ROThe resistivity of pure water is generally40-2μS/cm(25℃).EDIThe resistivity of pure water can be as high as18 MΩ.cm(25℃)However, depending on the application of deionized water and the system equipment Settings,EDIPure water is suitable for preparing resistivity requirements1-18.2MΩ.cm(25℃)Pure water.

  EDI A membrane stack is composed of a certain number of units sandwished between two electrodes. In each unit, there are two different types of chambers: the fresh water chamber for desalination and the concentrated water chamber for collecting the removed impurity ions. The fresh water chamber ceiling is filled with mixed cation and anion communication resins, which are located between two membranes: a cation communication membrane that only allows cations to pass through and an anion communication membrane that only allows anions to pass through.

  Therefore,EDIThe technology is widely adopted by the pharmaceutical industry, microelectronics industry, power generation industry and laboratories. The application of high-purity water equipment in surface cleaning, surface coating, electrolytic industry and chemical industry is also becoming increasingly widespread.

   EDIStructural features of the pure water equipment module

  1The fresh water separator is selected as the cleaning gradePEMaterial

  2,EDIThe membrane sheets are made of imported homogeneous membranes and domestic heterogeneous ion-exchange membranes

  3Select imported productsEDISpecialized uniform particle resin and domestic productsEDISpecialized uniform particle resin

  4,EDIThe electrode plate is made of titanium with ruthenium plating technology

  5The compression plate is made by rolling and casting alloy aluminum with hardness.

  6The fixing screws are selected from national standard standard parts

  7The membrane stack undergoes a high pressure test before leaving the factory7barNo leakage

  8The membrane stack has low resistance and low power consumption

  9The exterior decorative panels are beautiful and robust in shape

  10The water treatment capacity of the large membrane stack3T/HThe water treatment capacity of the small mold pile75L/H

  11The planning of pure water, concentrated water and extreme water channels is reasonable, not easy to clog, and the water flow is evenly distributed without dead corners.

  EDIThe advantages of pure water equipment are as follows:

  1, Continuously produce ultrapure water, with excellent stability of the effluent quality, and generate ultrapure water at a high rate(The yield can be as high as95%);

  2, No acid or alkali regeneration is required, and the machine will not shut down due to regeneration;

  3, The equipment has a compact structure, small volume and occupies little space;

  4, It saves backwashing and cleaning water, generates no regenerative wastewater, and does not require sewage treatment equipment;

  5, The equipment is simple and convenient, and the cost is low;Reduce the operating costs and maintenance costs of the equipment;

  6, The equipment is easy to operate and has a relatively low labor intensity;

  EDIThe requirements of the equipment for the inlet water parameters:

  1It is generally the osmotic water from single-stage reverse osmosis or two-stage reverse osmosis

  2,TEAIt is always possible to communicate anionsCaCO3(Calculated)<25ppm

  3Electrical conductivity:<40μS/cm

  4,PH:6.0~9.0. When the total hardness is lower than0.1ppmAt that timeEDIGood jobpHThe scope is8.0~9.0

  5Temperature 5~35℃

  6Inlet water pressure<4bar(60psi)

  7Hardness: (in)CaCO3(Calculated)<1.0ppm

  8Organic matter TOC"<0.5ppm

  9,SDI 15min:<1.0

      Beijing Yuanlai produces and sells KanpurEDIModule and assembly productionEDIThe complete pure water equipment, with the Kampur module operating stably, produces water that meets the water quality standards and satisfies the needs of customers in various industries, thus being widely accepted by users. All after-sales issues of Kanpur modules can be consulted and handled by calling our company. We truly consider the customers' needs!


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