Reagents for circulating water systems
Natural water used in water circuit systems requires purification and treatment. Necessary parameters of fresh water quality with minimal financial cost can be achieved through its corrective processing by chemical agents.
Chemicals for this type of treatment should include scale and corrosion inhibitors, oxygen and hydrogen sulfide scavengers and defoamers.
The greatest danger in water circuit systems lies in salt sediments, which lead to the corrosion of equipment and other negative effects (oxygen corrosion, multiplication of aerobic microorganisms and sulfate-reducing bacteria). Scale inhibitors of DIREX S series prevent carbonate, sulfate, silicon and iron sediments, as well as biological and organic pollution. Antiscalants shifts the concentration threshold, at which the deposition of salts begins and also impedes the growth of the crystals. DIREX S are excellent inhibitors for sediment control.
The presence of sulfate-reducing bacteria, which oxidize organic compounds and restore sulfur compounds to hydrogen sulfide, causes corrosion of the inner surface of the tubes and contamination of the water. They transform elemental sulfur (can be contained in natural water or be formed during oxidation of hydrogen sulfide) into sulfuric acid that destroys the metal surface. To reduce the corrosion of equipment, it is possible to apply protective coverings on the surface from various materials. The use of DIREX C or DIREX CS will provide a high degree of protection for the entire surface at lower labour and financial costs. These reagents do not have a negative impact on heat exchange and do not react with microbicides.
There are many different solutions to control microorganisms and algae: ultraviolet radiation (energy-intensive), chlorinating agent (increases corrosion); it is much more efficient and economical to use biocides DIREX B and algaecides DIREX A , that overwhelm viability of fungi, bacteria, algae, and biofilm. The addition of dispersants amplify the effects of biocides, contributing to the rapid extinction of biofilms.
The presence of oxygen in a corrosive environment usually has a technogenic origin due to a variety of factors: seal failure of pumps, closures or regulators, and other reasons. The chemical removal of oxygen is based on the metering of substances, capable of entering into a chemical reaction with dissolved oxygen.
Oxygen scavengers DIREX OX link dissolved oxygen in the boiler and feed water (chemical deaeration) to ensure the anticorrosive properties of the equipment and to improve the protective behavior of corrosion inhibitors against carbon and hydrogen sulfide. DIREX OX is not a carcinogen, it is not toxic and nonexplosive. As a result, the oxygen content is reduced to the minimum values in a short period of time.
Specialists of Alfahimprom JSC also developed a reagent brand DIREX N - an absorber (neutralizer) of hydrogen sulfide and mercaptans, which also has bactericidal properties. It can be used both in wastewater treatment plants and in water circulation systems as a hydrogen sulfide absorber.
The suppression of foam formation in water circuit systems is regulated by defoamer DIREX F. DIREX F is a versatile and active reagent for achieving desired results in different systems: wastewater systems, cooling systems, sewage treatment plants, etc. The reagent is environmentally friendly as it decomposes into safe constituents.
The treatment with reagents is the least costly and most profitable for water circuit systems. Our company's specialists select reagents suitable for specific conditions, conduct laboratory and pilot tests, develop technology for metering, give recommendations on the application of reagents based on the technological characteristics of the system, and organize the development of reconstruction schemes for the water circuit systems.
We will consult and help you to select the suitable reagents.
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