即将水中的导电介质几乎完全去除，又将水中不离解的胶体物质、气体及有机物均去除至很低程度的水。电阻率大于10～18.3MΩ*cm极限值。超纯水,是一般纯水设备很难达到的程度，通常采用预处理、反渗透技术、超纯化处理以及后级处理四大步骤，多级过滤、高性能离子交换（抛光）、超滤过滤器、紫外灯、除TOC装置等多种处理方法，电阻率方可达18.25MΩ*cm。

Industrial reverse osmosis device

      Nearly complete removal of the conductive medium in the water, and the water does not dissociation of colloidal substances, gases and organic matter are removed to a very low degree of water. The resistivity is greater than 10 ~ *cm 18.3M limit value. Ultra pure water, pure water machines and equipment in general difficult to achieve, usually by pre treatment, reverse osmosis technology, ultra purification treatment and after treatment of four steps, multi-stage filtration, high performance ion exchange (polished), ultrafiltration filter and UV lamp, in addition to the TOC device, such as a variety of treatment methods, the resistivity up to 18.25M Omega column with a。

制备工业超纯水的工艺流程大致分成以下几种：

      （1）采用离子交换树脂制备超纯水的传统水处理方式，其基本工艺流程为：原水→沙炭过滤器→精密过滤器→阳床→阴床→混床（复床）→纯水箱→纯水泵→后置精密过滤器→用水点 。

      （2）采用反渗透水处理设备与离子交换设备进行组合的方式，其基本工艺流程为：原水→沙炭过滤器→精密过滤器→反渗透设备→纯水箱→混床（复床）→超纯水箱→超纯水泵→后置精密过滤器→用水点 。

      （3）采用反渗透水处理设备与电去离子（EDI）设备进行搭配的的方式，这是一种制取超纯水的最新工艺，也是一种环保，经济，发展潜力巨大的超纯水制备工艺，其基本工艺流程为：原水→沙炭过滤器→精密过滤器→反渗透设备→纯水箱→电去离子（EDI）→超纯水箱→超纯水泵→后置精密过滤器→用水点 。

      三种制备工业用超纯水的工艺比较目前制备电子工业用超纯水的工艺基本上是以上三种，其余的工艺流程大都是在以上三种基本工艺流程的基础上进行不同组合搭配衍生而来。

The process of preparing industrial ultra pure water is roughly divided into the following:

      （1）Traditional water by ion exchange resins in the preparation of ultra pure water treatment, the main process: raw water, sand carbon filter, precision filter, Yang bed, anion bed, mixed bed (double bed), pure water tank, water pump, post precision filter, water 。

      （2）By use of reverse osmosis water treatment equipment and ion exchange equipment combination way and the main process: raw water, sand carbon filter, precision filter, reverse osmosis equipment, pure water tank, the mixed bed (double bed), ultra pure water, ultra pure water pump, post precision filter, water。

      （3）Preparation technology of reverse osmosis water treatment equipment and electrodeionization (EDI) equipment to match the way, which is a preparation of ultra pure water of the latest technology and environmental protection, economic, development potential huge super ultrapure water and the main process: raw water, sand carbon filter, precision filter, anti penetration equipment, pure water tank, electrodeionization (EDI), ultra pure water, ultra pure water pump, post precision filter, water。

      Three preparation industry with ultra pure water process is the preparation of electronic industry with ultra pure water technology is more than three, the rest of the process is mostly on the basis of the above three kinds of basic process of different combination collocation derivative。

现将他们的优缺点分别列于下面：

      （1）第一种采用离子交换树脂其优点在于初投资少，占用的地方少，但缺点就是需要经常进行离子再生，耗费大量酸碱，而且对环境有一定的破坏。

      （2）第二种采用反渗透作为预处理再配上离子交换设备，其特点为初投次比采用离子交换树脂方式要高，但离子设备再生周期相对要长，耗费的酸碱比单纯采用离子树脂的方式要少很多。但对环境还是有一定的破坏性。

      （3）第三种采用反渗透作预处理再配上电去离子（EDI）装置，这是目前制取超纯水最经济，最环保用来制取超纯水的工艺，不需要用酸碱进行再生便可连续制取超纯水，对环境没什么破坏性。其缺点在于初投资相对以上两种方式过于昂贵。

The advantages and disadvantages of them are listed below：

      （1）The first ion exchange resin has the advantages of less initial investment, less occupied place, but the drawback is that the need to often carry out ion regeneration, consuming a large amount of acid and alkali, and the environment has a certain damage。

      （2）Second using reverse osmosis as pretreatment with ion exchange equipment and its characteristics for early investment than by ion exchange resin is higher, but equipment ion regeneration cycle is relatively long, the consumption of acid and alkali than simply using ion exchange resin to a lot less. But there is a certain damage to the environment.。

      （3）The third kind of the reverse osmosis pretreatment and then with electrodeionization (EDI) device, which is currently producing ultra pure water the most economical, most environmental protection for the production of ultra pure water process, do not need to regenerated with acid and alkali can be continuously producing ultra pure water, not what destructive to the environment. The disadvantage is that the initial investment is too expensive in two ways。