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Electrodeionization Device (EDI)
Both ends of the EDI are equipped with positive and negative electrode plates, which generate an electric field when powered. The electric field causes water molecules in the incoming water to dissociate into H+ and OH- at the ion exchange resin interface, continuously regenerating the cation and anion exchange resins in the fresh water chamber.
Dirty water enters from the filter inlet, first passing through the coarse filter screen to remove larger particles, then reaching the fine filter screen. During filtration, the fine filter screen gradually accumulates dirt and impurities from the water, forming a filter impurity layer. Because the impurity layer accumulates on the inside of the fine filter screen, a pressure difference forms on the inside and outside of the fine filter screen. When the pressure difference of the self-cleaning filter reaches the preset value, a switch signal is sent to the control box PLC system to start a cleaning cycle. Cleaning process: The cleaning mechanism of the fully automatic negative pressure suction filter is a stainless steel spiral up-and-down moving suction scanner. It is hollow in structure, with several suction nozzles vertically distributed at certain distances along its axis. The inside of the suction scanner communicates with the 3” drain valve. When the drain valve opens, the pressure difference between the internal water pressure of the filter and the external atmospheric pressure generates strong suction at each suction nozzle. At each suction nozzle, water flows rapidly from outside to inside in reverse, washing impurities attached to the inner wall of the filter screen into the suction nozzle, through the hollow shaft of the suction scanner, then discharged through the drain valve, completing the cleaning process which takes about 30-60 seconds. At this time, the pressure difference returns to normal, the cleaning process ends, and filtration resumes. During cleaning, the system continues to flow.
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Electrodeionization Device (EDI)
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EDI (electrodeionization) technology is a new method for producing pure and ultrapure water. This technology combines electrodialysis and ion exchange techniques. Through the selective permeability of cation and anion exchange membranes to cations and anions, and the ion exchange action of ion exchange resins, ions are directionally migrated under the action of a direct current electric field, thereby achieving deep desalination of water, with water quality reaching above 15 MΩ·cm. During desalination, the hydrogen ions and hydroxide ions generated by water electrolysis regenerate the ion exchange resins, so no chemical acid-base regeneration is needed, allowing continuous production of ultrapure water. It features advanced technology, simple operation, and excellent environmental characteristics, representing a green revolution in pure water preparation technology.
At both ends of the EDI unit, positive and negative electrode plates are installed. When powered, an electric field is generated, causing water molecules in the feed water to dissociate into H+ and OH- ions at the interface of the ion exchange resin, continuously regenerating the cation and anion exchange resins in the dilute water chamber. During regeneration, the cations and anions in the ion exchange resin are attracted by the corresponding positive and negative electrodes and migrate through the cation and anion exchange resins toward the corresponding ion exchange membranes. When these ions pass through the exchange membranes into the concentrate chamber, H+ and OH- recombine to form water. The generation and recombination of H+ and OH- and the migration of cations and anions are the mechanisms that enable continuous regeneration of the ion exchange resins.
Dirty water enters from the filter inlet, first passing through the coarse filter screen to remove larger particles, then reaching the fine filter screen. During filtration, the fine filter screen gradually accumulates dirt and impurities from the water, forming a filter impurity layer. Because the impurity layer accumulates on the inside of the fine filter screen, a pressure difference forms on the inside and outside of the fine filter screen. When the pressure difference of the self-cleaning filter reaches the preset value, a switch signal is sent to the control box PLC system to start a cleaning cycle. Cleaning process: The cleaning mechanism of the fully automatic negative pressure suction filter is a stainless steel spiral up-and-down moving suction scanner. It is hollow in structure, with several suction nozzles vertically distributed at certain distances along its axis. The inside of the suction scanner communicates with the 3” drain valve. When the drain valve opens, the pressure difference between the internal water pressure of the filter and the external atmospheric pressure generates strong suction at each suction nozzle. At each suction nozzle, water flows rapidly from outside to inside in reverse, washing impurities attached to the inner wall of the filter screen into the suction nozzle, through the hollow shaft of the suction scanner, then discharged through the drain valve, completing the cleaning process which takes about 30-60 seconds. At this time, the pressure difference returns to normal, the cleaning process ends, and filtration resumes. During cleaning, the system continues to flow.
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International Trade Department:+8613210553256
Address: Room 1512-1, Building 7, Rongsheng Times International Plaza, No. 9 Beiyuan Street, Licheng District, Jinan City, Shandong Province
