Ultra-pure water is a kind of water that normally pure water equipment generally difficult to achieve the degree, usually using pre-treatment, reverse osmosis machine, ultra-pure water treatment equipment as well as post-processing step total 4 steps, multi-stages of filtration, high-performance ion exchange (polished), super filer machine, UV lamp, in addition to a variety of processing methods such as TOC vice or other something likes, the resistivity reachability 18.25MΩ*cm. These are steps of reverse osmosis plant.
Reverse osmosis plant technical processes roughly divided into the following:
1, Using the traditional methods of water treatment ion exchange resin manufacturing ultra-pure water, the basic process:
Raw water → Sand charcoal filter → Precision filter → Anode bed → Cathode bed → Mixing bed (Duplicated) → Pure water tank → Pure water pump → Rear set precision filter pure water pump → Water outlet.
2, By way of a reverse osmosis plant water treatment equipment combined with ion exchange equipment, the basic process:
Raw water → Sand charcoal filter → Precision filter → Reverse osmosis plant → Pure water tank → Mixing bed (Duplicated) → Super pure water tank → Super pure water pump → Rear set precision filter pure water pump → Water outlet.
3, Using reverse osmosis water treatment equipment together with electrodeionization (EDI) device, which is a preparation of ultra-pure water the latest technology, also is an environmentally, economical, potential development of ultra-pure water process, the basic process as following:
Raw water → Sand charcoal filter → Precision filter → Reverse osmosis machine → Electrodeionization (EDI) → Ultra-Pure water tank → Ultra-Pure water pump → Rear set precision filter pure water pump → Water outlet.
All these three industry use pure water treatment machine is currently basically used for electrical industrial and plating area. The rest of pure water treatment process, mostly based on the basis of the above three basic processes with different combinations of derivatives from.
Ultrapure water treatment equipment technology advantages and disadvantages are listed below:
1, The first method of an ion exchange resin has the advantage that a small initial investment, less space occupied, but the disadvantage is the need for frequent regeneration of ions, acid alkaline consuming a lot, and there is some damage to the environment.
2, The second on a pre-matched of reverse osmosis plant, ion exchange equipment, which is characterized by initial investment higher than ion exchanging method, but the ion exchanging device regeneration cycle is relatively longer than the 1th method, acid-consuming much less than simply using ion resin exchanging. But also there are still some destructive to environment.
3, The third method of reverse osmosis machine for pre-treatment then together with electrodeionization (EDI) system, which is currently the most economical system for producing ultra-pure water, and also the most environmentally friendly ultra-pure water technology, without using acid regeneration still can continuous preparation of ultra-pure water, nothing damaging to the environment.