EDI纯水设备系统，作为一种高效的水处理技术，其优点在于：①提供稳定的去离子水质；②实现全自动化控制，提高操作便利性；③不需停机进行再生维护，降低运行成本；④无需化学药品再生，大幅减少环境污染；⑤运行费用显著降低，提升经济性；⑥占地面积小巧，便于装置安装和管理空间利用；⑦无污水排放，对环境友好。ED pure water system, as a high-efficiency water treatment technology, its advantages include: ① providing stable deionized water quality; ② achieving fully automated control for enhanced operational convenience; ③ no need to shut down for regeneration maintenance, reducing operating costs; ④ eliminating the use of chemical regenerants to significantly reduce environmental pollution; ⑤ running costs are significantly lowered, improving economic efficiency; ⑥ occupying less space, facilitating device installation and management space utilization; and ⑦ producing no wastewater discharge that is friendly to the environment. The development history of high-purity water equipment can be traced back through three stages: (1) pre-treatment → bed filtration → mixed-bed filtration, (2) pre-treatment → reverse osmosis → mixed-bed filtration, and (3) pre-treatment → reverse osmosis → EDI system. Reverse osmosis technology uses membrane separation methods to remove ions from water but cannot meet industrial production requirements due to residual impurities. Therefore, subsequent processes must employ ion exchange devices. Traditional ion exchange techniques have long been the standard process in pure water production but have become increasingly insufficient due to their reliance on periodic regeneration with large amounts of chemicals such as acid-base solutions and purified water.
The emergence of EDI technology has addressed these issues by combining membranes with resins in a single device that applies electro-regeneration cationic deionization processes instead of traditional mixed-cationic anionic deionization processes. This combined technique utilizes both ion-exchange resins and selective ion membranes to achieve excellent desalination results when coupled with reverse osmosis systems. As a result, it produces high-quality output water at levels between 10~17MΩ·CM.
The working principle of an EDI pure-water system involves:
Water enters the system primarily flowing into resin/membrane interiors while another portion flows along exterior templates for washing away ions leaking out.
Ion-exchange resins within the device capture dissolved ions from incoming feedwater.
Electrodes drive negatively charged ions towards positive electrodes and positively charged ones towards negative electrodes.
4-6 Steps involve selectively allowing only non-ionized substances through specific membranes while concentrating removed ions in waste flow channels.
7 Finally, clean deionized product water emerges from resin/membrane interiors.
To ensure optimal performance under various conditions without compromising purity or effectiveness during operation or maintenance tasks involving cleaning parts like filters or replacing consumables like activated carbon cartridges etc., proper care should always be taken not only against contamination risks associated directly related activities themselves but also indirectly caused by improper handling practices which could lead unintentionally spread harmful bacteria throughout your entire purification setup thus rendering all efforts futile even if they were carried out meticulously beforehand since now there's nothing left worth saving anymore henceforth known as "the end".
