The development of seawater desalination began in the 1960s. After decades of development, seawater desalination technology has been relatively mature. Among them, distillation and membrane methods have become mainstream technologies. At present, the distillation method still dominates the entire desalination market internationally, but its development speed lags behind the reverse osmosis method. Distillation method refers to the method of seawater desalination using heat energy, including multi-stage flash evaporation (MSF), multi-effect evaporation (MED), pressure vapor distillation (VC), etc. The membrane method mainly uses the selective permeability of the membrane to separate salt water to achieve the purpose of seawater desalination, mainly including reverse osmosis (RO) and electrodialysis (ED). The industrial operation of desalination is generally higher than the cost of conventional water resources development and utilization. The cost of seawater desalination includes energy costs, reagent costs, equipment costs, management fees, etc. In the future, as the share of seawater desalination in human production and domestic water gradually increases, the demand for water treatment agents in the field of seawater desalination will continue to increase.
Quick answer: A practical additive decision starts with the exact defect: foam, poor wetting, craters, haze, or instability. The best product is usually the one that solves that defect with the safest compatibility window.
For the membrane method, during the seawater desalination operation, due to changes in seawater temperature, pH, ion concentration, etc., calcium and magnesium ions in the seawater may generate carbonate, acid salt, and hydroxide precipitates, which block the membrane pores and reduce the membrane. Therefore, it is necessary to add scale inhibitors, detergents, flocculants, scale inhibitors and dispersants to the water to reduce the impact of scale deposition on the reverse osmosis membrane. For the distillation method, it is easy to produce scales and reduce the evaporation efficiency. The pretreatment of seawater can be used to reduce the impact. Adding polyacid salt, organic acid, phosphonic polycarboxylic acid, etc. to the raw water to soften the water quality, and to the calcium and magnesium ions And other metal ions chelate to make it difficult to precipitate and prevent the formation of scale.
Chlorine dioxide tablets are our company’s superior products, Disinfection of living, drinking and tap water in various occasions. Disinfection, sterilization, deodorization and anti mildew treatment of medical, health and clinical instruments. Sterilization and deodorization in reclaimed water reuse.
Reverse osmosis seawater desalination uses high pressure to separate the fresh water through a reverse osmosis membrane, and the remaining part will form concentrated water with a high salt content, which will inevitably cause scaling and foaming, which will affect the normal operation of the equipment. Operation and service life. This requires adding corresponding water treatment chemicals to the water for treatment to prevent scaling and eliminate bacteria, so as to ensure the quality of the water and extend the service life of the equipment.
There are clear regulations and strict operating specifications for the dosing methods of special agents for seawater desalination. Ordinary water treatment agents cannot meet the normal operation of seawater desalination equipment, and the special agents for seawater desalination equipment are not used in accordance with the prescribed ratio. After the equipment has been in operation for a period of time , There will be consequences such as substandard water quality.
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A practical selection checklist for wetting, leveling, and defoaming additives
Additive selection is usually most effective when the team defines the defect first and then screens compatibility, dosage range, and process stage. That is often much more reliable than choosing only by chemistry family or by a single dramatic lab result.
- Start from the defect, not the additive name: wetting loss, crater, microfoam, and instability often need different solutions even inside the same formula.
- Check compatibility at the intended dosage: the strongest additive can still be the wrong commercial choice if it narrows the process window too much.
- Review the stage of use: some products are most useful during grind, while others matter more during let-down, filling, or final application.
- Balance cure or film quality with defect control: the right additive fixes the problem without sacrificing adhesion, gloss, or appearance.
Recommended product references
- CHLUMIAF 094: A balanced defoamer reference for waterborne coatings and many general foam-control screens.
- CHLUMIAF 3062: Useful when printing-ink and UV-ink compatibility matter in the defoaming screen.
- CHLUMIAF 3037: A stronger process-defoaming option when persistent foam survives harsher conditions.
- CHLUMIWE 3280: A strong wetting-agent reference for inks, coatings, and difficult substrate wetting.
FAQ for buyers and formulators
Why does an additive that looks powerful in a beaker sometimes fail in production?
Because shear, temperature, substrate, and the full formula can all change the way the additive performs under real process conditions.
Should the most aggressive additive always be preferred?
Not usually. The best additive is the one that solves the real defect while preserving the broadest safe operating window.
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