Röntgenographische Untersuchungen rauchgasseitiger Verschlackungs‐ und Korrosionsprodukte in Dampferzeuger‐Anlagen

Abstract

dungsphase, bei der der fixe Kohlenstoff der Adsorptionskokse zu Oberflachenoxiden oxidiert wird. Die katalytische Aktivitat kann aufierdem durch die in unterschiedlichen Mengen an der Oberflache anwesenden katalytisch wirksamen Metallionen beeinflufit werden, worauf Impragnierungsversuche hindeuten.Die Arbeit ist rnit Mitteln der Hohen Behorde der Montanunion finanziell unterstutzt worden.

Mineralogical composition of boiler fouling and slagging deposits and their relation to fly ashes: The case of Kardia power plant

“…3), formed also alternated zones consisting mainly of anhydrite and hematite and had a similar qualitative composition. Alternating zones of tube deposits, consisting mainly of anhydrite as adhesive mass between various iron rich phases, were already observed by Pollmann [4], while typical tube slags of a similar macroscopic view are described by Heap et al [30], Benson et al [14] and others. The particles were usually covered with a glass layer, which obviously held them cemented contributing thus to a high consistence of the slag deposits.…”

“…Such parameters are burning temperature, temperature gradient in the boiler system, air/coal ratio, gas velocity and others [1,2]. Gumz et al [3] summed up investigations concerning structure, chemical and phase composition of slags of brown coal burning boilers; Pollmann [4] studied the chemical and mineralogical composition of deposits from several temperature zones of a coal burning power plant boiler; Watt [5] in a survey of thermal behaviour of coal minerals summarised several investigations; Beising et al [6] and Hein [7] described slags formed in the furnace of brown coal burning boilers and presented their detailed mineralogical composition, while Reid [8] studied the relation of mineral composition to slagging, fouling and erosion during and after combustion. Sondreal et al [9], Hein [10], and Wall and Lindner [11] described the structure of typical deposits; Alfonso and Molino [12] described the physical nature of deposits; Walsh et al [13] and Benson et al [14] described processes contributing to the formation of ash deposits and increase of their thickness.…”