The iron pollution in the operation of EDI ultra pure water system is also a key reason for the decrease in the characteristic of its water producing resistor ˉ。

In the raw water and pre-treatment system software, most of the outlet pipelines of the original centrifugal water pump and the inlet and outlet pipelines without valve filtration are made of ordinary seamless steel pipes, without implementing internal anti-corrosion solutions. This leads to an increase in the iron content in the system software. After the iron is corroded, most of the iron dissolved in water is stored in the form of ferrous hydroxide, which is further oxidized by air to become Fe (OH) 3. Fe (QH) 2 is a colloidal chemical substance, while Fe (OH) 3 is a floating state. Due to the strong affinity of epoxy resin for iron, it can lead to irreversible reactions when adsorbed by epoxy resin. In the treatment of anion and cation exchange water, the anion and cation beds will pass through H α Reconstruction or cleaning can remove the vast majority of iron from the epoxy resin. But in the operation of EDI devices, there is no H α Reconstruction and cleaning, a small amount of iron in the water will adhere to the anion and cation epoxy resin and anion and cation films. Moreover, because iron exists in a colloidal state as a chemical substance, its conductivity is strong and it cannot react with cationic resins in time. Therefore, it is placed close to the negative membrane water in the EDI component, and iron is transferred to the positive membrane under the effect of high electrical flow rate. Simple ferrous ions are easy to penetrate, while the iron chemical substances in transparent liquids are not easy to penetrate the positive membrane and are adsorbed on the surface of the positive membrane, polluting the negative and positive membranes in the environment, resulting in a decrease in the working characteristics of EDI components, poor water production quality, and a significant decrease in resistance.

专业水处理的疑难问题，产品选型问题，可以单击下面的微信二维码电话联系贺工在线指导，长按微信二维码可自动识别添加贺工微信沟通解决您的疑难问题