The main types and characteristics of Slow release bactericidal and scale inhibitor

Slow release bactericidal and scale inhibitor is a type of scale inhibitor with the function of "slowly releasing effective ingredients". Through structural design or formulation treatment, the scale inhibiting active ingredients are gradually released in the water body, rather than being rapidly dissolved in one go.

（1） Solid slow-release scale inhibitor
It exists in solid form (such as block, particle, tablet), and the core components are fixed by carriers (such as soluble resins, inorganic minerals). After being put into water, the carrier slowly dissolves or decomposes, gradually releasing anti scaling active substances.
Features: Easy to operate, no need for complex dissolution equipment, single dosing can maintain effects for weeks to months; Suitable for small circulating water systems (such as household wall mounted boilers, solar water heaters) and decentralized water treatment equipment (such as small water purifiers).
Common ingredients: Polycarboxylic acids and organic phosphonates are often used as active ingredients, combined with slow-release carriers (such as calcium sulfate and soluble starch) to ensure controllable release rates.
（2） Coated slow-release scale inhibitor
Wrap ordinary scale inhibitors (liquid or solid powders) in slowly degradable coating materials (such as polylactic acid, cellulose derivatives) to form microspheres or granular products. In water, the coating material gradually degrades or swells, releasing internal scale inhibitors.
Features: Controllable release rate (achieved by adjusting the thickness of the coating and material degradation rate), suitable for systems sensitive to fluctuations in scale inhibitor concentration (such as precision heat exchangers and cooling water systems in the electronics industry); Reduce the risk of equipment corrosion caused by excessive local concentration of chemicals.

Applicable scenarios: Industrial small and medium-sized circulating water systems, process water systems that require stable concentration of chemicals.

（3） Gel type slow release scale inhibitor
With high molecular gel as carrier (such as polyacrylamide gel, agar gel), the scale inhibiting active ingredients are evenly dispersed in the gel network. In water, the gel slowly swells, and the active ingredients are gradually released through the diffusion of the gel network.
Features: Strong compatibility, can be compounded with various scale inhibitors (such as adding corrosion inhibitors at the same time), achieving the dual function of "scale inhibition+corrosion inhibition"; The gel itself has adsorbability, which can assist in the removal of small suspended solids in water.
Applicable scenarios: household central water treatment system, swimming pool water circulation system, small industrial cooling water tank.
Slow release bactericidal and scale inhibitor is a water treatment agent that combines the dual functions of slow-release scale inhibition and bactericidal and algae killing. It is mainly used in industrial circulating water systems, reverse osmosis (RO) systems, cooling towers, boilers and other scenarios that require high water quality stability. Its core advantage lies in the ability to slowly and continuously release effective ingredients, while inhibiting scale formation and microbial growth during long-term operation, reducing dosing frequency, and improving system stability.
Slow-release bactericidal and scale inhibitor