EDI（Electrodeionization）是一种具有革命性意义的水处理技术，它巧妙地将电渗析技术和离子交换技术相融合，无需酸碱，而能连续制取高品质的纯水。它具有技术先进、操作简单、良好的环保特性，代表着一种行业方向。它的出现是水处理技术的一次革命性的进步，标志着水处理工业最终全面跨入绿色产业的行列。EDI装置由增压泵、电去离子（EDI）模块、直流稳压电源、流量计、仪表等组成。合格的RO产水经增压泵增压进入EDI系统，EDI膜堆中混合离子交换树脂将不断的去除原水中的阴、阳离子。而通过膜堆电流将在阴膜和阳膜附近的水分子使之产生氢离子和氢氧根离子，电离的氢离子和氢氧根离子将再生混合离子交换树脂，同时交换下来的阴、阳离子经过反扩散分别由阴膜和阳膜进入浓水室排出。电再生过程使EDI系统既不需要停机也不需要传统的再生设备就能实现持续产生高质量的去离子水。 美国Hansens 拥有多年研发生产EDI的技术，按行业标准HY/120-2008、HG/H3982-2007,新推出无需浓水循环、无需加盐的全填充式EDI模块新产品。

EDI(Eletrodeionization), Based on merging ED and Ion Exchanger, an economical way to produce high-purity water continuously- no batch regenration, no hazardous chemicals. With the advanced technology, easy operation and enviromental advantage, it is represent the direction of this field. EDI caused a revolution in water treatment technology. And it is the symbol that water treatment industry exceeds in green standard. EDI equipment includes booster pump. EDI module, DC regulated power supply, flow meter and instrument. EDI equipment includes boost pumps. EDI modules, high voltage DC potentials, flow meters, pipe instruments, etc. Qualified RO produced water is forced into EDI system by boost pumps. Mixed ion exchange resin will continuously remove the impurities from the water by ion exchange. Meanwhile, the electrity to stream flows past the anode and cathode in series, the applied current also drives a water splitting reaction which products hydronium ions (protons) and hydroxylions. These ions continuously regenerate the ion exchange resin so that it will continue to remove impurities from the feed water. At the same time, re-displaced cation and anion from the feed water will permeate into concentrate chamber by some times reverse osmosis. As result, a portion of concentrated stream is recycled back to keep the conductivity, while the other portion of concentrated stream are drained continuously into the sewer tunnel. Electro-regeneration makes its possible to produce continuously de-ionized water without shutdown or conventional regeneration equipment. Hansens from America have years of EDI technology R&D, according to HY/120-2008, HG/H3982-2007 standard, we developed a new design EDI which there’s no concentrated recycle, no salt-added packed EDI module.