Reverse Osmosis Equipment
0102030405
Original Manufacturer of Deionized Water Equipment
Equipment introduction
Deionized water equipment is an ion exchange system. Ion exchange means that when water passes through the ion exchange column, the cation in water and the anion in water (HCO- plasma) exchange with the H+ of the positive resin and the OH- of the negative resin in the exchange column, so as to achieve the purpose of desalting. Different combinations of Yang and Yin mixed columns can make the water quality reach higher requirements. Ion exchangers are divided into cation exchangers (softeners), anion exchangers, mixed ion exchangers, etc. The disadvantage is that the resin needs to be regenerated with acid and alkali after saturation.
Industrial process
The process of deionized water can be roughly divided into four types:
The first kind: deionized water obtained by positive anion exchange resin, generally through, the water conductivity can be reduced to 10us/cm below, and then through the mixed bed can reach 1us/cm below. However, the cost of water made by this method is high, and the particle impurities are too much to meet the ideal requirements. It is less used.
The second: pretreatment (that is, sand carbon filter + precision filter)+ reverse osmosis + mixed-bed process
This method is currently used more, because the reverse osmosis investment cost is not high, more than 90% of the water ions can be removed, and the remaining ions can be removed by mixed bed exchange, so that the effluent conductivity can be about 0.06.
The third: the use of two-stage reverse osmosis
The process is as follows:
Tap water → multi-media filter → activated carbon filter → softened water device → intermediate water tank → low pressure pump → precision filter → primary reverse osmosis →PH regulation → Mixer → secondary reverse osmosis (positive charge on the surface of reverse osmosis membrane)→ pure water tank → pure water pump → microporous filter → water point
The fourth: the pre-treatment uses reverse osmosis as the second method, but the mixed bed used behind is replaced by EDI continuous desalt film block, so that the acid-base regeneration resin is not used, but the electricity regeneration. This completely makes the whole process pollution-free, and the water quality after treatment can reach :15M or more. However, this method has more upfront investment and low operating costs. Make appropriate investments according to the circumstances of each company.
The process is as follows:.
Raw water → multi-media filter → activated carbon filter → softened water device → intermediate water tank → low pressure pump →PH regulating system → high efficiency mixer → Precision filter → High efficiency reverse osmosis → Intermediate water tank →EDI pump →EDI system → Microporous filter → water point
Technical characteristics of equipment
Ion exchange equipment is a traditional deionized water equipment, its water quality is stable, the cost is relatively low. In the past power plant boiler recharge water is used in the positive bed + negative bed + mixed bed treatment process.
With the development of reverse osmosis, EDI and other processes, the operation of ion exchange equipment is complex, it is not easy to achieve automation, waste acid and base, and high operating costs are more prominent, and more applied to the deep treatment of reverse osmosis.
Small ion exchange equipment often uses plexiglass exchange column, which is conducive to observing the operation of resin. For example, whether the mixed ion exchanger regeneration stratification is sufficient, whether the cation is "poisoned", etc., and the loss of resin. Large ion exchange equipment uses carbon steel lined with epoxy resin or rubber lining, with a visual device reserved in the middle to facilitate online observation of the water level of the regenerated liquid during ion regeneration.
Application field
1, industrial ultra-pure water treatment process.
2, food industry ion exchange resin can be used in sugar, MSG, wine refining, biological products and other industrial equipment.
3, synthetic chemistry and petrochemical industry in organic synthesis commonly used acids and bases as catalysts for esterification, hydrolysis, transesterification, hydration and other reactions.
4, metal ions in electroplating waste liquid, recycling useful substances in film production waste liquid, etc.
5, hydrometallurgy and other ion exchange resins can separate, concentrate, purify uranium and extract rare earth elements and precious metals from depleted uranium ore.
Equipment classification
According to different process water requirements of various industries and different raw water quality, different industrial deionized water equipment can be customized to meet the water standard.