Equipment introduction of pure water equipment

The EDI device is applied after the reverse osmosis system to replace the traditional mixed ion exchange technology (MB-DI) to produce stable deionized water. Compared with mixed ion exchange technology, EDI technology has the following advantages:

① Stable water quality; ② Easy to achieve fully automatic control; ③ No shutdown due to regeneration; ④ No chemical regeneration required; ⑤ Low operating costs; ⑥ Small footprint; ⑦ No sewage discharge.

EDI technology is a revolutionary water treatment technology. It is a continuous desalination process that organically combines electrodialysis and ion exchange. It is a high-tech green and environmentally friendly technology. EDI water purification equipment has the advantages of continuous water output, no need for acid and alkali regeneration, and unattended operation. It has gradually replaced mixed beds as fine treatment equipment in pure water preparation systems.

The EDI device is applied after the reverse osmosis system to replace the ion exchange resin and does not require acid-base regeneration. It has the characteristics of stable water quality, low operating costs, convenient operation and management, and small floor space. Project EDI Mixed bed water production properties 15~18MΩ·cm 2~10MΩ·cm Stability Water quality Stable water quality is greatly affected by resin exchange conditions and regeneration quality Operability is simple and does not require professional and skilled workers High requirements for operator operation during regeneration Environmental protection No need for acid and alkali, no chemical pollution, acid and alkali regeneration is required, and the problem of acid and alkali storage and discharge needs to be solved. There is no need to shut down during continuous operation for regeneration. Shutdown is required for regeneration while running. The operating cost of regeneration is low and high. The initial investment is high and low. ① Pretreatment

1. The traditional process consists of mechanical filters, activated carbon filters and security filters.

2. The latest technology consists of mechanical filter, security filter and ultrafiltration.

②Reverse osmosis system

1. Composed of high-pressure pump and reverse osmosis

2. It can be divided into primary reverse osmosis and secondary reverse osmosis

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③ Fine treatment system

1. Composed of ion exchange and microporous filter

2. Preparation process of ultrapure water equipment composed of EDI and microporous filter

1. Pretreatment system → reverse osmosis system → intermediate water tank → coarse mixing bed → fine mixing bed → pure water tank → pure water pump → ultraviolet sterilizer → polishing mixed bed → precision filter → water use object (≥18MΩ .CM) (traditional process)

2. Pretreatment → reverse osmosis → intermediate water tank → water pump → EDI device → purified water tank → pure water pump → ultraviolet sterilizer → polishing mixed bed → 0.2 or 0.5 μm precision filtration Device → water target (≥18MΩ.CM) (latest technology)

3. Pretreatment → first-level reverse osmosis → dosing machine (PH adjustment) → intermediate water tank → second-level reverse osmosis (positive charge Reverse osmosis membrane) → pure water tank → pure water pump → EDI device → ultraviolet sterilizer → 0.2 or 0.5μm precision filter → water use object (≥17MΩ.CM) (latest technology)

4. Pretreatment →Reverse osmosis→Intermediate water tank→Water pump→EDI device→Pure water tank→Pure water pump→UV sterilizer→0.2 or 0.5μm precision filter→Water use object (≥15MΩ.CM) (latest technology)

5. Pretreatment system → reverse osmosis system → intermediate water tank → pure water pump → rough mixing bed → fine mixing bed → ultraviolet sterilizer → precision filter → water target (≥15MΩ.CM) (traditional technology) Each of the above processes has its own The advantage is that you can choose a process that suits you according to your own situation. With the development of science, many new processes have replaced old processes. The reverse osmosis method for producing high-purity water has become popular and is the most current process.