18.25 megaohm polishing resin mixed bed anion and cation exchange resin

18.25 megaohm polishing resin mixed bed anion and cation exchange resin




Professional production: anion and cation exchange resin, macroporous adsorption resin, softened water resin, mixed bed MB resin, 18 megaohm ultra pure water polishing resin, wire cutting slow wire resin, sewage decolorization resin, electroplating wastewater nickel and chromium removal resin, iron, copper, phosphorus, boron, and heavy metal removal resin, acid recovery resin, chelating resin, food grade resin, alum extraction resin, gold absorption resin, silver extraction resin, strong acid, strong alkali, weak acid, weak alkali, with dozens of models including 001 × 7, 001 × 8, 732, 717, 201 × 7, 201 × 4, D001, D201, D301, D113, D101, H103, D403, D408, etc

The polishing resin produced by our company is divided into18Zhaohe15A box of trillions5Package, one package5riseWe can customize packaging according to customers (drum, woven bag)

Specializing in the production and sales of ultra pure water resin, mainly used forDIThe post mixed bed of water and ultrapure water system, which is used for nuclear grade mixed bed, ensures high quality and low price. Polishing resin when water enters5Ms/cmThe resistance of the effluent quality is ≥15MΩ/cm-18MΩ/cm.

Note: Polishing resin is a mixture of cationic and anionic resins. We mix them in proportion before leaving the factory, and customers can directly load and use them without regeneration. It is convenient, fast, and effective to use!

Polishing mixed bed resin is a regenerated high conversion rate cation anion mixed resin, and the cation resin isHType, Yin resin isOHAt this time, the cation and anion resins are bound together by the force of positive and negative charges, forming an infinite number of layers of composite beds. The water flows through the mixed bed resin and undergoes countless layers of exchange filtration, resulting in high-purity water quality. Yang resinH+Ions and WaterCa2+TheMg2+TheNa+When the cation undergoes a displacement reaction, the anion resinOH-It undergoes displacement reaction with anions such as sulfate and chloride in water, resulting in the displacement of cation resinH+Replaced with anionsOH-Formation of ion bindingH2OHowever, as the usage time increases, the exchange capacity of the resin will gradually decrease (i.eH+andOH-Gradually being exchanged by corresponding ions, the static electricity between the cation and anion resins will also weaken, leading to delamination after resin failure.

In addition, the reason for delamination is also caused by some unreasonable processes during use and filling, such as adding too much water to the tank before resin loading, which leads to delamination of the mixed resin; For example, in the process of using a mixed resin, various reasons such as water flow backwashing (similar to backwashing the mixed resin) caused by stopping use can lead to delamination of the mixed resin.

After the mixed resin is layered, there are no multiple layers of double beds, and the lighter weight of the anion resin will be in the upper layer, while the heavier weight of the cation resin will sink downwards. At this time, due to the asynchronous ion exchange, the effluent of the mixed bed resin will be unqualified, and the periodic water production will also be greatly affected.

At present, domestic high and ultra pure water users are not very familiar with the application of this product, so there is a widespread blind pursuit of expensive imported polishing mixed bed resins. Some small resin production enterprises in China, in order to obtain *, participate in vicious low price competition in the market with unqualified and low-priced products, which has also led to some users not recognizing domestic polishing resins. It is hoped that through communication, end users can understand the physical and chemical properties and application methods of the products.

Polishing resin product usage and precautions

　　1.polishing resin(It is highly purified and transformedHType Yang Resin andOHPre mixed with type negative resin, if loaded and operated properly, a resistivity greater than can be prepared in the initial cycle18.0MΩ.cmandTOCless than10ppbUltra pure water.

　　2.After opening, resin exposed to air for a long time will absorb carbon dioxide, so it should be used as soon as possible when unpacking. The unused parts must be carefully sealed and stored in a cool and dark place, with an ambient temperature of5-40℃It is appropriate.

　　3.During transportation, storage, and loading, any contact with inorganic or organic substances can contaminate the resin, thereby reducing the quality of the effluent water;Affects operating conditions. Therefore, it is necessary to ensure that all equipment and water used for loading and operation do not contaminate the resin. All water in contact with resin must use high-purity water(The water mentioned in this article refers to'high-purity water', that is, the resistivity is greater than or equal to10MΩ.cmAt the same timeTOCAs low as possible below30ppbThe water)All equipment or appliances that come into contact with resin must be cleaned with high-purity water before use.

　　4.If replacing the resin, the old resin in the equipment must be removed from the resin container, and the interior of the resin container must be clean and free of impurities.

Polishing resin is generally used at the end of ultra pure water treatment systems to ensure that the effluent quality of the system maintains the water standard. The effluent quality can reach18Above megaohms, and forTOCTheSIO2They all have a certain level of control ability.

18.25 megaohm polishing resin mixed bed anion and cation exchange resin
Our company's products are sold throughout the country and have been exported to countries such as the United States, Russia, Japan, Southeast Asia, Europe, and Asia. Our company not only provides high-quality products for our customers, but also has an excellent after-sales team to provide satisfactory after-sales service for our customers! And through quality management system certification, the company's products have become recommended products by the China Fine Chemical Industry Association.
But if you see these things in daily life, you will feel so familiar. The steps and operating points of resin regeneration method/

1、 Layered:

Layering is the process of separating mixed ion exchange resins that have already become saturated, failed (or not regenerated), and are still in a mixed state for regeneration. Usually, backwashing is used. Before stratification, 5% NaOH with a flow rate of 1 to 2 times the resin volume can be introduced into the bed from bottom to top, and then backwashed. The backwash flow rate is about 4-10m/h and the time is about 20 minutes.

2、 Acid base pairing:

According to the requirement of 4 times the volume of resin in the bed, prepare 5% concentration HCl and 5% concentration NaOH for regeneration.

Mixed bed resin

3、 Synchronous transformation:

Synchronous transformation refers to the simultaneous transformation of M+type cation exchange resin and R-type anion exchange resin that have already saturated and failed into H+type cation exchange resin and OH - type anion exchange resin, restoring their ion exchange function. During synchronous transformation, introduce 3-4 times the volume of 5% concentration NaOH into the R-type anion exchange resin in the upper half of the mixed bed, and 3-4 times the volume of 5% concentration HCl into the M+type cation exchange resin in the lower half of the mixed bed. The synchronous transformation time is about 60 minutes. The key point is to adjust the middle drain valve and control the flow rate of the discharged water. The liquid level must always be maintained at the middle of the sight glass, about 5cm above the surface of the anion exchange resin.

4、 Synchronous displacement flushing:

After the synchronous transformation is completed, reverse osmosis fresh water is used to continue slowly injecting water into the mixed bed from top to bottom, replacing and flushing the anion and cation exchange resins to prolong the chemical reaction time and save the amount of chemical regenerant. The synchronous replacement flushing time is about 20 minutes.

Mixed bed resin

5、 Synchronous flushing:

After the replacement flushing is completed, switch to synchronous flushing to wash away excess regenerant. Continue to inject water into the mixed bed synchronously from top to bottom using reverse osmosis fresh water to flush the anion and cation exchange resins. The conductivity of the effluent from the middle discharge pipe is lower than that of the mixed bed inlet, and the pH of the effluent from the middle discharge pipe is close to neutral. The synchronous flushing time is about 20 minutes.

6、 Air jet mixing:

After synchronous flushing is completed, switch to air flushing mixing. When air is mixed, nitrogen or oil-free compressed air is introduced from the lower part of the mixed bed to stir the anion and cation exchange resins inside the mixed bed and mix them. The air mixing time is about 15 minutes.

Mixed bed resin

7、 Water injection:

After the air mixture is complete, quickly add water ^ fen ^ and open the exhaust valve to exhaust until the exhaust valve releases water. Drain for 1 minute and close the exhaust valve.

8、 Rinsing:

Water injection completed, switch to rinsing. The rinsing state is similar to the working state, except that during rinsing, if the effluent resistivity of the mixed bed is less than the rated value, it needs to be discharged. The rinsing time is about 30 minutes.

9、 Work:

After rinsing, the mixed bed is put into operation or standby.