Industrial EDI ultrapure water equipment

Pure water production utilizes a combination of EDI modules and membrane separation technology. These two technologies have specific requirements for the incoming water quality during equipment operation. Membrane elements have extremely small pores. If the water entering the reverse osmosis unit contains a high concentration of large particles and impurities, it can directly clog the membrane elements, impacting the operation of the entire system.The EDI module is the core technology in the current ultrapure water production device. It purifies water through electrodeionization. If the module is accumulated with contaminants, it will not only affect the normal operation of the ion exchange process, but also directly damage the EDI module. The EDI module is the most advanced technology in ultrapure water production, so its price is more expensive than other accessories. If the raw water is not pretreated, the service life of the equipment will be shortened, which will bring financial burden to the user.

Analysis of pretreatment process in EDI ultrapure water preparation
The main function of pretreatment is to remove or reduce the amount of large particle impurities such as suspended matter and colloids in the raw water. Currently, the commonly used methods of pretreatment are:

1. Sedimentation: Utilizing natural sedimentation or chemical softening, sedimentation is performed to remove impurities from the water, resulting in sedimentation of silt, large suspended solids, or hardness.

2. Coagulation and Clarification: Coagulants are used to cause solid particles in the water to adhere to each other, changing their size, shape, and density, thereby separating them from the water.

3. Filtration: This is a widely used pretreatment technology. Combined with resin materials, impurities are trapped by the filter media, resulting in clarified water quality.

Using scientific and rational methods to pretreat raw water ensures the continuous and stable operation of the EDI water purification system. The application of pretreatment technology lays the foundation for pure water production.

EDI ultrapure water treatment

1. No need for acid or alkali regeneration: In a mixed bed, resin regeneration requires chemicals, while EDI eliminates the handling of these hazardous substances and the laborious process. This protects the environment.

2. Continuous and simple operation: In a mixed bed, the operation process becomes complicated due to each regeneration and fluctuations in water quality. However, EDI's water production process is stable and continuous, with consistent water quality. There are no complex operating procedures, greatly simplifying operation.

3. Reduced installation requirements: Compared with a mixed bed of similar water capacity, the EDI system is smaller in size. Its modular design allows for flexible configuration based on site height and layout. This modular design makes the EDI system easy to maintain during production.