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Valmet debuts online ash analyzer to improve boiler availability


April 13, 2021
By P&PC Staff

Valmet has developed a new solution to reduce forced boiler shutdowns caused by superheater corrosion or boiler plugging.

The solution provides guidance for ash treatment and sootblowing needs.

The new Valmet Recovery Ash Analyzer measures the ash composition at the electrostatic precipitator (ESP) and determines the ash melting temperatures that describe the corrosiveness and stickiness of ash.

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A new Valmet Industrial Internet (VII) application, Valmet Ash Balance Advisor, is an additional option to add to the analyzer to optimize ash treatment.

Operators are provided with an online view of ash balance and boiler operation with real-time indicators of fouling and corrosion risks.

Ash treatment has typically been a batch operation based on infrequent laboratory tests with no standard criteria of when to start treating or dumping ash.

The Valmet Recovery Ash Analyzer measures the complete chemical balance including ESP ash pH, carbonate (CO3), sulfate (SO4), chloride (Cl), potassium (K) and sodium (Na) concentrations as well as calculating ash melting temperatures T0, T15 and T70.

The ESP ash sample is taken from the ash drop shoot after the ash conveyor by a robust stainless-steel sampler, dissolved in water, and transferred to the analyzer where chemical analyses and ash melting temperature calculations are made.

Comprehensive diagnostics and secure Valmet Industrial Internet (VII) ready capabilities ensure reliable and dependable results with intuitive access to measurement operation and remote services from Valmet.


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