Deionized water equipment
Working principle:
Using ion exchange method, the water can be To remove ionic cations and anions, sodium chloride represents inorganic salts in water. The basic reaction of water desalination can be expressed by the following equation:
Deionized water equipment
< r>Cation exchange resin
：++ ++
< r>Anion exchange resin
：+ +
The total reaction formula of cation and anion exchange resin can be written as:
R+R+R+R+
It can be seen from this that the + and + in the water have been replaced by the + and + on the resin, and the reaction products are only, so the effect of removing salt from the water is achieved.
The main processes of electroplating deionized water equipment
:
< r>The process of deionized water
can be roughly divided into four types:
The first one: using cations and anions Generally, after passing through the deionized water obtained by the exchange resin, the conductivity of the effluent water can be reduced to / or below, and then it can reach / or below after passing through the mixed bed. However, the cost of water produced by this method is extremely high, and there are too many particle impurities, which cannot meet the ideal requirements. It is rarely used now.
The second type: pretreatment (i.e. sand carbon filter + precision filter) + reverse osmosis + mixed bed process
This method is currently the most used, because the investment cost of reverse osmosis is not high. , can remove more than % of the ions in the water, and the remaining ions are removed through mixed bed exchange, so that the conductivity of the effluent water can be: about. This is currently the most popular method.
The third type: using< r> two-stage reverse osmosis
method
The process is as follows:
Tap water rr multi-media filter rr activated carbon filter rr water softener rr intermediate water tank rr low pressure pump rr precision filter rr one-stage reverse osmosis rr adjustment rr mixer rr two-stage reverse osmosis (reverse osmosis membrane surface is positively charged) rr pure water tank rr pure water pump rr microporous filter rr water point
The fourth method: Pretreatment uses reverse osmosis like the second method, except that the mixed bed used later is replaced by a continuous desalination membrane block, so that acid and alkali regeneration of the resin is not needed, but electricity regeneration is used. This completely makes the entire process pollution-free, and the water quality after treatment can reach: above. However, this method requires relatively large initial investment and low operating costs. Make appropriate investments based on the circumstances of each company. Nothing could be better. The process is as follows:
Raw water rr multi-media filter rr activated carbon filter rr water softener rr intermediate water tank rr low-pressure pump rr value adjustment system rr high-efficiency mixer rr precision filter rr high-efficiency reverse osmosis rr intermediate water tank rr water pump rr System rr microporous filter rr water point
< Large pure water equipment
New deionized water equipment preparation process:
Depending on the application industry, the application of deionized water equipment The process is also different. Here we take the production process of ultrapure water for cleaning coated glass lenses as an example:
Pretreatment rr reverse osmosis rr intermediate water tank rr water pump rr device rr purified water tank rr pure water pump rr Ultraviolet sterilizer rr polishing mixed bed rr precision filter rr water object () (latest technology)
Pretreatment rr one-stage reverse osmosis rr dosing machine (adjustment) rr intermediate water tank rr second-stage reverse osmosis (positive charge) Reverse osmosis membrane) rr pure water tank rr pure water pump rr device rr ultraviolet sterilizer rr precision filter rr water object () (latest technology)
Pretreatment rr reverse osmosis rr intermediate water tank rr water pump rr device rr pure water tank rrPure water pumprrUltraviolet sterilizerrrPrecision filterrrWater use object()(latest technology)
First rinse the resin with clean water, and then use ~% The and are alternately soaked in the exchange column for ~ hours, and rinsed with a large amount of clean water between the acid and alkali until the effluent is close to neutral. Repeat ~ times, and the amount of acid and alkali used each time is times the volume of the resin. The last treatment should be carried out with ~% solution, drain out the acid, rinse with water until neutral and set aside.
The process characteristics and application fields of electroplating deionized water equipment:
< r>Ion exchange equipment
It is a traditional deionized water equipment with stable water quality and relatively low cost. In the past, power plant boiler feed water used the positive bed + negative bed + mixed bed treatment process.
In recent years, with the development of reverse osmosis and other processes, the disadvantages of ion exchange equipment such as complex operation, difficulty in automation, waste of acid and alkali, and high operating costs have become more prominent. Currently, ion exchange equipment is more used in deep treatment of reverse osmosis.
Small ion exchange equipment often uses organic glass exchange columns, which is helpful for observing the operation of the resin. For example, whether the regeneration stratification of the mixed ion exchanger is sufficient, whether the cations are poisoned, etc., and the resin loss, etc.
Large-scale ion exchange equipment uses carbon steel lined with epoxy resin or rubber, with a visual device reserved in the middle to facilitate online observation of the regeneration liquid level during ion regeneration.
The industrial ultrapure water treatment process is currently one of the most widely used processes in the preparation of industrial ultrapure water.
< r>Food industry ion exchange resin
Can be used in industrial equipment such as sugar, monosodium glutamate, alcohol, and refined biological products.
Ion exchange resins in the pharmaceutical industry play an important role in developing a new generation of antibiotics and improving the quality of existing antibiotics. The successful development of streptomycin is a prominent example.
In the synthetic chemistry and petrochemical industries, acids and bases are commonly used as catalysts in organic synthesis to carry out reactions such as esterification, hydrolysis, transesterification, and hydration.
< r>Metal ions in electroplating waste liquid
Recover useful substances in film production waste liquid, etc.
Hydrometallurgy and other ion exchange resins can separate, enrich and purify uranium from depleted uranium ores and extract rare earth elements and precious metals
After-sales service:
Our company is responsible for every product we provide. Each set of equipment has a one-year warranty and a lifetime warranty. It has a complete parts library, provides all spare parts, and provides users with suppliers/manufacturers of related equipment and consumable materials
Equipment debugging is completed and delivered for use Before the installation, complete operation and maintenance procedures are provided to customers, free operation and maintenance training is provided, and a service engineer is stationed on site to follow the operation service day
Within one year from the date of acceptance of the equipment, unless there is a man-made or natural disaster In addition to force majeure factors such as sudden change, if the water output fails due to quality problems of the equipment itself, our company will be responsible for free repair or replacement. Maintenance services after the free maintenance service period will only be charged a reasonable cost.
Provide users with relevant technical consultation and rational suggestions for reducing operating costs
During the one-year warranty period, service engineers will be dispatched monthly to check the operating status of the equipment on site, and from time to time. Telephone visits to equipment operating conditions. Outside the warranty period, after-sales service technicians will make regular visits to equipment users, regularly check operation records, collect feedback information and provide guidance to assist users in solving related problems.
Depending on the condition of the equipment, if our company receives a repair notification, it can be solved by phone within hours.
Contact person: Wang Peng