Infrasound Solution for Fouled SCR and the Economizer in World’s Largest Waste-to-Energy Boiler

Infrafone, with headquarters in Stockholm, Sweden, is using infrasound as a soot cleaning method and has plenty of experiences from various fuels and applications. The technical development has resulted in a product with much higher acoustic power than any other similar products on the market and acoustic modelling software that is unique. Infrasound cleaning increases the efficiency, the availability and the lifetime of industrial and marine boilers. In this text we start by describing the properties of infrasound and the product, while finishing by looking deeper into a couple of recent results obtained on waste to energy boilers.

In power plants and heating plants the infrasound technology is used for a cost-efficient cleaning method mainly for economizers, air preheaters, catalysts and ducts. Deposits on heat exchanging surfaces have very different characteristics for different fuels and in different parts of a boiler though. At high flue gas temperature, melted components such as alkali chlorides, lead chlorides and zinc chlorides result in sticky ash, reaching the heat exchanging surfaces and other surfaces. At flue gas temperature typical of economizers, air preheaters and catalysts, the stickiness of the ash is low, resulting inefficient cleaning using infrasound. For fuels with relatively dry deposits such as coal or
e.g. a mixture of wood chips and peat the infrasound can be efficient enough to be the only cleaning method required even for superheaters and temperatures up to approximately 800 °C.



Copyright: © TK Verlag - Fachverlag für Kreislaufwirtschaft
Quelle: Waste Management, Volume 6 (September 2016)
Seiten: 10
Preis: € 0,00
Autor: Martin Ellebro
Henrik Blom
 
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