Ion exchange bed equipment system is through the anion, cation exchange resin for water yam, cation replacement of a traditional water treatment process, anion, cation exchange resin can be formed according to different proportion with ion exchange cation bed system, ion exchange bed system and ion exchange bed ( double bed ) system, and the mixed bed ( double bed ) system and is usually used in reverse osmosis water treatment process used for producing ultra pure water, ultrapure water terminal technology, he is currently used in the preparation of super pure water, high pure water irreplaceable means of. The conductivity of water from below the 1uS/cm, effluent resistivity reached 1M Ω.Cm above, according to the different water quality and requirement, the water resistivity can be controlled in 1~18.2M Ω.Cm. Ion exchange technology in the field of water treatment has been widely used in electronic, chemical, electroplating power ultra pure water, ultrapure water, boiler water supply and medical use of ultrapure water, industrial ultra-pure water, high pure water preparation. And in recent years the introduction of reverse osmosis device to compare, with removal of ionic impurities thoroughly; for pretreatment of water requirement is low; equipment the advantages of lower cost. In the preparation of high pure water, ion exchange technology in the no alternative equipment. Water salinity below 400mg/l, according to the different requirements of users, the effluent quality in 1.0-0.2us/cm. If the inlet total salt content in 500mg/l above, with electrodialysis combined desalination, water quality can be improved.

Ion exchange resin in mixed bed equipment working principle

Using ion exchange method, can make the water in ion cation, anion removal, with sodium chloride ( NaCl ) represents the water quality in salt of inorganic salts, basic can be reacted with the following formula:

1, cation exchange resin: R - H+Na+ R - Na+H+

2, anion exchange resin: R - OH+Cl- R - Cl+OH-

In 3, Yang, anion exchange resin total reaction can be written: RH+ROH+NaCl -- RNa+RCL+H2O

From this may see, NaCl in water have been separately resin H+ and OH- replaced, and the reaction product is H2O, it reached the removal of salt effect.

Ion exchange mixed bed resin pretreatment equipment

Cation exchange resin pretreatment

First use of water on resin wash, and then use the 4~5% HCl and NaOH in exchange columns alternately soaked 2~4 hours, in pH between with plenty of water to water close to neutral leaching, so repeat 2~3 times, each time the amount of resin acid volume 2 times. The last processing applications 4~5% HCl solution was put out, acid, water washing to neutral can be used.

Anion exchange resin pretreatment

First use of water on resin flush, then with 4 ~5% of NaOH and HCl in exchange columns alternately for 2 ~4 hours in between, alkali and acid leaching with large amounts of water to the water outlet close to neutral, so repeat 2~3 times, each time the amount of resin acid volume 2 times. The last processing application 4~5% NaOH solution, with all the alkali, water washing to neutral can be used.

Regeneration of ion exchange resin process

Ion exchange resin in use after a period of time, adsorption of impurities close to saturated condition, will be regenerated, so as to restore the original composition and properties. At present, the domestic resin regeneration chemical insecticides used acid-base method so that failure of restorative resin exchange capacity, acid use usually adopt HCl or H2SO4, the deployment of concentration of about 3-5%; alkaline use generally use NaOH, concentration of about 3-5% deployment.

A stratified, backwashing:

Backwash velocity of 10 m /, backwashing time of 15 minutes, with the settlement after the Yang, Yin resin layer interface is clear discriminant effect of stratification.

Two, in the regenerated liquid:

Take about 20 minutes after the pump required regeneration fluid, soak 2-3 hours after the wash method, anion resin flush to the alkalinity of about PH=8-9, cation resin flush water acidity to about PH=5-6.

Three mixed:

From the bottom of the nitrogen (also used compressed air, vacuum pumping and mixing ), into the pressure 0.1~0.15MPa, 2.5~3.0 m 3/ intake (M 2 points), the mixing time is generally 5 to 10 minutes, to the column resin mixing for the end.

Ion exchange resin ultra pure water production process characteristics and application field

Ion exchange bed equipment is the traditional deionized water equipment, the produced water quality is stable, relatively low cost. In the power plant boiler water with cation bed + anion bed + mixed bed treatment process. In recent years, with the reverse osmosis, EDI technology development, ion exchange equipment of complicated operation, not easy to realize automation, waste acid and alkali, high running cost disadvantages become more prominent, more current is applied to the reverse osmosis treatment.

Small ion exchange bed device usually adopts the organic glass column, facilitates the observation of resin operation. Such as ion exchange regeneration hierarchical adequacy, cation is " poisoning ", resin loss situation.

Large ion exchange bed equipment adopts carbon steel lined with epoxy resin or rubber lining, middle reserved visual device, in order to facilitate ion regeneration online observation regenerating liquid level condition.

The company specializes in ion exchange bed equipment, can effectively remove the water of various ions, water quality control within 10US, excellent product quality, price, good customer service, and provide related equipment model project for reference . Warmly welcome new and old customers to inquire.

Ion exchange bed equipment application areas: power boiler, circuit, electroplating, electronic, optical, chemical, oil, surface treatment and other industries with process of softened water, pure water.

Ion exchange bed equipment system features: the initial investment saving, simple operation, but later maintenance cost is higher, need regular use of water recycling. The effluent water quality of operator dependent high, hazardous waste discharge.

Ion exchange bed equipment conventional configuration flow diagram: municipal tap water, raw water tank, water pumps, sand filter, activated carbon filter→→→cation bed bed pure water tank, water points

Process description of the process including pretreatment, ion exchange fine desalting part.

1, raw water pretreatment: raw water containing a variety of impurities, such as suspended substance, colloid, organic and inorganic compounds. In order to ensure the system pre salt portion of the normal work, must first remove suspended matter, colloid, such as organic matter, make the water reach the requirement, the system set up raw water pretreatment. Raw water pretreatment portion includes a mechanical filter, active carbon filter, a security filter.

( 1) mechanical filter: the equipment of water turbidity has certain requirements, water pollution index SDI value requirements of less than 4, the turbidity of less than 1NTU. Multi medium filter in the filter includes several specifications of quartz sand, used for removing water of suspended and colloidal destabilization after.

( 2) active carbon filter active carbon filter can further adsorption of organic matter in raw water. Active carbon filter filled with refined and shell activated carbon for adsorption of residual chlorine in water, organic matter, in part, pigment and harmful substances, reduce chemical oxygen demand COD. Activated carbon is widely used in living water and food industry, chemical industry, water purification, as activated carbon specific surface area is large, its surface is covered an average of 20 - 30 angstroms pore, therefore, activated carbon with high adsorption capacity. In addition, the activated carbon has large surface hydroxyl and carboxyl functional groups, can be of various properties of organic substances and chemical adsorption, electrostatic force, therefore, the activated carbon can remove humic acid in water, Fuwei acid, lignin sulfonic acid and other organic substances, but also to remove the residual chlorine as a kind of reverse osmosis membrane harmful substances, preventing reverse osmosis membrane oxidation. Usually able to remove 63% - 86% colloidal material, around 50% of iron, as well as 47 - 60% of the organic substances. Activated carbon from chlorine process is a simple redox process. This process has the potential to make activated carbon is broken, but broken charcoal does not affect the emergence of residual chlorine effect, thus activated carbon from residual effect is very strong.

In 2, double bed ion exchange desalination parts finishing:

( 1) cation bed: internal quality of strong acid cation exchange resin, resin type: 001*7, the quality of the whole exchange capacity is 4.5mmol/g, sulfonic polystyrene gel type resin, with excellent physical and chemical stability and good durable temperature performance, good selectivity, high exchange capacity. Reverse osmosis water into the anode bed, the remnants of the cations and cation resin exchange reaction occurs, the replacement of hydrogen ion, the cations are further removed, removal rate is above 90%.

( 2) anion bed: built-in strong basic anion exchange resin, resin type: 201*7, the quality of the whole exchange capacity is 3.8mmol/g, sulfonic polystyrene gel type resin, with excellent physical and chemical stability and good durable temperature performance, good selectivity, high exchange capacity. Cation bed effluent into the bed, the remnants of the anion and cation resin exchange reaction occurs, the replacement of hydroxyl ions and cation bed replacement from a hydrogen ion neutralization reaction, made of neutral water. Anions are further removed, to achieve fine desalting effect.

Ion exchange bed equipment parameters related to please call the Advisory, inform your water, your water requirement, water quality, we will always based on the forefront of technology, to the local water quality for the truth, to provide customers with innovative products and services. Company according to customer needs and design the most appropriate actual customer solutions, plus the value of the full range of technical services to meet the needs of different customer, special needs, so as to effectively assist customers to solve the problem, the maximum help customers reduce costs.

Ion exchange bed device applications

1, industrial ultra-pure water treatment technology, is currently the industrial preparation of ultrapure water for most applications in a process of.

In 2, the food industry of ion exchange resin can be used for sugar, MSG, liquor purification, biological products and other industrial equipment.

In 3, the pharmaceutical industry of ion exchange resin for the development of a new generation of antibiotics and to the original quality plays an important role in the improvement of antibiotics. Streptomycin development success is outstanding example.

4, synthesis of chemical and petrochemical industry in organic synthesis are commonly used in acid and alkali as catalyst for esterification, hydrolysis, transesterification, hydration reaction.

In 5, the metal ions in electroplating wastewater, waste recycling film producer in the useful substances.

6, metallurgy and other ion exchange resin from depleted uranium in separation, can be concentrated, purified uranium and extraction of rare earth elements and precious metals.

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