Scale inhibitors are a class of agents that maintain good operation of water treatment equipment. Such agents can disperse poorly soluble inorganic salts in water. It is also possible to prevent or interfere with the precipitation of poorly soluble inorganic salts on the metal surface. And it also has the function of decomposing scale.
Reverse osmosis scale inhibitors and circulating water scale inhibitors work in different places. What is the difference between them? Read on The Guide to the difference of scale inhibitors between circulating water and RO’s.
1. How to choose scale inhibitors
To choose a scale inhibitor, the first thing to consider is the water quality it handles. If the water quality changes are relatively large, it should be based on the worst water quality. Especially wastewater. The water quality changes even more.
This requires proper diversion of the water from the discharged wastewater system upstream of it. Avoid particularly harsh water entering the wastewater recovery system.
For the choice of scale inhibitors. For relatively stable water quality, those scale inhibitors that meet the scale inhibition requirements can be used. At the same time, try to choose products with high purity. This will help to extend the cleaning cycle.
For wastewater systems. Due to the complicated water quality, the water quality fluctuates greatly. The scaled components are more and the fouling tendency is obvious. When selecting a water treatment chemical, consider a compound scale inhibitor. To take advantage of the synergy of the ingredients. Improve overall scale inhibition performance.
2. What is the difference between reverse osmosis scale inhibitor and circulating water scale inhibitor
Because of the different situations faced by the two, the requirements for them are different.
The operating environment of circulating water requires long-term and bacteria-tolerant. Therefore, a large amount of polymer dispersant can be used. The scale inhibition effect can be increased by providing the dispersion of the suspended matter. The circulating water system is bulky and runs mostly in the open air. Therefore, it does not require high purity of the medicament.
3. Advantages and disadvantages of the concentration of scale inhibitor
High concentrations of scale inhibitors can reduce transportation costs. This is a significant advantage of it. The proportion of transportation costs has become higher and higher. This has already attracted the attention of various suppliers.
For a single type of scale inhibitor. The higher the concentration, the narrower the stable interval.
For the compound type scale inhibitor, the stability intervals of the individual agents are different. The difficulty is even greater to increase the concentration of the product.
In addition, the higher the concentration of the scale inhibitor, the faster the rate of change will occur during storage. The content of impurities will also increase.
4. The development history of reverse osmosis scale inhibitor
The development history of reverse osmosis scale inhibitors is consistent with the application history of reverse osmosis technology. Reverse osmosis technology was first used in desalination and brackish water treatment.
With the increase in environmental requirements and the decline in membrane costs. The application of reverse osmosis technology is common in all areas of water desalination.
In recent years, China’s industry has developed rapidly. The disorder of industrial enterprises is very common. This chaos caused the water quality of the natural water system to deteriorate. The phenomenon of contamination in the use of membranes is also becoming more common. It is getting more and more attention from everyone.
5. The important role of the determination of membrane surface pollutants
In recent years, China’s industry has developed rapidly. The disorder of industrial enterprises is very common. It causes the deterioration of water quality in natural water systems. At present, almost all water desalination uses reverse osmosis technology. The phenomenon of contamination in the use of membranes is also becoming more common. It is getting more and more attention from everyone.
The determination of the contamination of the membrane remains at the empirical stage. How to qualitatively quantify the application of reverse osmosis technology to determine the contamination of the membrane surface has been affected.
IRO conducts a qualitative and quantitative analysis of membrane surface contamination, in conjunction with Dequest’s laboratory and China National Key Laboratory of Water Chemistry. This escorts the application of reverse osmosis technology.
6. Can organic phosphine scale inhibitors cause eutrophication of water systems?
The eutrophication of water bodies means that the nutrients such as nitrogen and phosphorus required by living organisms enter the slow-flowing water bodies such as lakes, estuaries, and bays under the influence of human activities. This causes algae and other plankton to rapidly multiply on the surface of the water. The amount of dissolved oxygen in the water is reduced and the water quality is deteriorated. This can lead to a large number of deaths of fish and other organisms.
Inorganic phosphorus is soluble in natural waters. This is conducive to the reproduction of algae and other plankton. This has led to eutrophication of the water body.
Organic phosphines usually react with the calcium in the sludge. Therefore, organic phosphine is often deposited and attached to the bottom sludge. Its slow natural degradation turns into a nutrient for underwater plants. It does not become a nutrient for algae and other plankton. So it will not cause eutrophication of the water!