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ISBN 9783843903561

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978-3-8439-0356-1, Reihe Energietechnik

Elisa Alonso Herranz
Short-term measurement of high-temperature chlorine-induced corrosion and agglomeration during biomass and waste combustion

180 Seiten, Dissertation Technische Universität München (2011), Softcover, A5

Zusammenfassung / Abstract

The combustion of biomass is one of the most important ways of harnessing renewable energies. However, the operational availability and efficiency of biomass and waste-fired facilities are relatively low due to problems such as high-temperature chlorine-induced corrosion and agglomeration on the fire-side. These issues have been investigated in laboratories, small-scale research facilities and power plants by methods that are generally expensive and time-consuming. This work aims to evaluate the feasibility of short-term tests (< 1 day) for quantifying corrosion and agglomeration. Short-term tests (8 to 30 h) were carried out in a small-scale facility and in a power plant using three different corrosion monitoring techniques: two offline (metallography and iron loss measurement) and one online (linear polarisation resistance – LPR). The duration of the tests did not suffice to quantify corrosion by means of offline techniques. However, a significant correlation between fuel composition and corrosion signal could be established online by means of LPR measurements. The results of this research show that slightly longer tests (~ 50 h) and minor changes to the LPR sensor provide a promising basis for the short-term measurement of this kind of corrosion.