Advantages of water production by EDI equipment for pure water equipment

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Electrodeionization (EDI) is a pure water manufacturing technology that combines ion exchange technology, ion exchange membrane technology and ion electromigration technology. It is a high-tech green technology. The EDI device is used after the reverse osmosis system to replace the traditional mixed ion exchange technology (MB-DI) to produce stable deionized water. It is promoted in industries such as electronics, power, chemicals, and especially medicine.

As a new technology, EDI pure water equipment can gradually replace the traditional mixed bed technology, and it has its unique advantages.

1. The pure water equipment of the EDI device occupies a small space, the installation requirements are simple, and the operation is easy because it does not require a mixed bed and a raw device;

2. The water produced by the pure water equipment of the EDI unit is continuously stable and the effluent quality is high, and the water quality of the mixed bed will deteriorate when the resin approaches failure. EDI equipment pure water equipment is a continuous water purification process, so its product water quality is stable, the electrical resistivity is generally 15MΩ·cm, up to 18MΩ·cm, reaching the index of ultrapure water, which is the highest requirement for pure water at present. . The water purification process of the mixed bed ion exchange facility is intermittent. After just being regenerated, the water quality of the product is relatively high, and the water quality of the product is relatively poor before the next regeneration.

3, EDI equipment pure water equipment operating costs are low, regeneration only consumes electricity, no acid and alkali, saving material costs: EDI equipment pure water equipment operating costs including electricity consumption, water consumption, pharmaceutical costs and equipment depreciation costs, eliminating the need for acid Alkali consumption, recycled water, wastewater treatment and sewage discharge. In terms of power consumption, the EDI pure water equipment is about 0.5 kWh/t water, and the mixed bed process is about 0.35 kWh/t water. The cost of electricity consumption is relatively economical in power plants, and can be calculated at the price of the plant electricity. In terms of water consumption, the EDI unit has a high water production rate and does not require reclaimed water, so the operating cost in this respect is lower than that of the mixed bed unit. The cost of the EDI device investment can be fully recovered within a few years.

4, EDI equipment pure water equipment environmental benefits are significant, increased operational safety: EDI is an environmentally friendly technology, ion exchange resin does not require acid, alkali chemical regeneration, saving a lot of acid, alkali and cleaning water, greatly reducing labor intensity. More importantly, there is no waste acid and waste alkali discharge. It is a non-chemical water treatment equipment. It does not require acid and alkali storage, treatment and no waste water discharge, so it is particularly attractive to new users.