LC PURE Industrial General-Purpose LC-300 EDI Membrane Stack An Efficient Choice for Ultra-pure Water Preparation in Small and Medium-sized Industries

In small and medium-sized industrial production, a stable and reliable supply of ultra-pure water is crucial for ensuring product quality and production efficiency. The LC PURE industrial general-purpose LC-300 EDI membrane stack, with its suitable water production capacity and excellent performance, has become an ideal solution for such scenarios.

Working Principle

The core operating mechanism of the LC-300 EDI membrane stack is the synergy of electrodialysis and ion exchange technologies. The internal 4 pairs of mixed ion exchange resins are responsible for adsorbing cations and anions in water. The electrodes at both ends of the membrane stack provide a transverse DC electric field, driving the adsorbed ions through the corresponding anion and cation exchange membranes.

A fresh water chamber is formed between the anion exchange membrane facing the positive electrode and the cation exchange membrane facing the negative electrode, and a concentrated water chamber is formed between the anion membrane facing the negative electrode and the cation membrane facing the positive electrode. When water flows through these chambers, ions in the fresh water chamber are continuously removed, gradually improving water purity, while the concentrated water chamber collects and discharges the removed ions, thus realizing the continuous production of ultra-pure water to meet the water demand of small and medium-sized industrial scenarios.

Detailed Parameter Table

Inlet Water Quality Requirements

To ensure the stable operation and prolong the service life of the LC-300, the inlet water must meet the following conditions:

• It must be reverse osmosis (RO) product water, with an inlet conductivity of less than 10μs/cm (including CO₂ and silicon). Controlling it within 5μs/cm can further reduce losses.

• The temperature should be maintained at 5-30℃, and the inlet water pressure should be kept at 0.1-0.3MPa.

• The maximum total chlorine content (Cl₂) is <0.02ppm, and iron (Fe), manganese (Mn), and sulfide (S⁻) are all <0.01ppm.

• The pH value is between 7-8, and the total hardness (calculated as CaCO₃), dissolved organic matter (TOC, calculated as C), and silicon (calculated as SiSO₂) are all <0.5ppm.

• Oxidizing substances and oil/grease must not be detected.

Practical Application Case

The cleaning process of an electronic component processing factory requires about 0.25m³ of ultra-pure water per day, with a water quality requirement of resistivity ≥15MΩ·cm. The previously used pure water equipment had unstable water production, often with water quality fluctuations, resulting in a pass rate of only 92% after component cleaning. Moreover, it needed to be shut down twice a month for acid-base regeneration, affecting the production schedule.

After introducing the LC-300, the factory has achieved:

1. A stable daily water production of 0.3m³, fully meeting the water demand of the cleaning process, even ensuring supply during peak production periods.

2. The water resistivity is stable at 16-18MΩ·cm, and the pass rate of electronic components after cleaning has increased to 99%, with the scrap rate reduced by 7 percentage points.

3. No manual acid-base regeneration is needed, only 1 simple inspection per month, saving the workload of 2 maintenance personnel and avoiding the environmental pressure of waste acid-base treatment.

4. The concentrated water is recycled for workshop floor cleaning and equipment cooling, saving about 3 tons of water per month and reducing production costs.

Product Advantages

1. Stable and adaptive water production: The standard water production flow of 0.3m³/h accurately matches the water demand of small and medium-sized industrial scenarios, and can be maximally increased to 0.4m³/h to cope with temporary water peaks.

2. High efficiency and energy saving: With a maximum power of only 1.2KW/H, the energy consumption is reduced by more than 15% compared with similar equipment, which can significantly save electricity expenses in long-term use.

3. Convenient installation and maintenance: The 300mm width design occupies small space and can be flexibly integrated into the existing production line layout; maintenance only requires a short shutdown, with little impact on production.

4. Environmental protection and economy: No need to treat waste acid and alkali, meeting environmental protection requirements, and concentrated water can be reused, reducing water waste and operating costs.

With its stable performance, suitable water production capacity, and economical and environmental protection features, the LC PURE industrial general-purpose LC-300 EDI membrane stack provides an efficient and reliable ultra-pure water solution for small and medium-sized industrial scenarios, helping enterprises improve product quality and production efficiency.