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Silica and silicates are added to water as conditioners, detergents and corrosion inhibitors. However, silica in water can cause significant prob-lems for industries, primarily in boiler and steam applications. High pressures and high temperatures cause silica deposits on boiler tubes and heat exchangers, which can cause a variety of problems including the following:
Measuring silica in water is useful when the efficiency of demineralizers is monitored. Testing for silica (one of the first impurities detected when the exchange capacity of a demineralizer is exhausted) provides a sensitivity check of demineralizer performance.
Hach offers a variety of testing kits, instruments, reagents and more you need to successfully monitor and manage silica levels in your specific process application.
Accurate and precise measurement for laboratory and industrial applications. Hach's benchtop silica meters offer advanced features and user-friendly interfaces.
Both lightweight and durable, Hach portable meters provide on-the-go silica testing that you can rely on in even the most challenging conditions.
Hach’s online analyzers for silica offer high precision and low maintenance for colorimetric analysis.
With the simplicity and accuracy of Hach test kits, you can effortlessly get fast results for silica testing in a variety of field applications.
Hach’s portable test kits and reagents save you time and money by providing fast, accurate results when and where you need them.
Boiler Water: Scale formation due to hardness, silica, and corrosion product deposits can decrease the heat exchange capacity and global efficiency of the boiler. Steam quality varies with the concentration of impurities in the boiler water and the potential mechanical carryover of contaminated water droplets into the steam. The higher the operating pressure of the boiler, the higher the purity requirements since contaminant carryover is promoted. Silica measurements (drum boiler blowdown): silica build-up in the boiler depends on the drum pressure, < 5 ppb.
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