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The paper presents slagging and fouling properties of ashes when hard coal was fired in a pulverized coal-fired boiler (230 t/h capacity) and the change of fouling indices of resulting fly ash when halloysite fireside additive was used. During reported full-scale study the pulverized coal-fired boiler was fired with hard coal with the addition of pulverized halloysite injected directly into furnace...
This paper presents a comparison of the degree of fouling in a hot water stoker-fired boiler after it has been fired with two types of coal with different characteristics for an extended period of time. The extent at which indices that characterise the tendency to cause slagging and fouling on boiler heating surfaces found in the literature correspond to the actual state of ash deposits in the boiler...
Particulate fouling of convective heat-transfer surfaces is usually assessed by empirical correlations. Nevertheless, constant progress in numerical calculation methods allows for prediction of deposition. This paper presents results of 2D modeling of powdery, medium-temperature deposit formation on superheater tubes. In contrast to other studies, presented approach results in shape prediction of...
The article deals with results of full-scale investigations on fouling in convective bundles of chosen types of coal-fired boilers. The boilers tested were: conventional pulverized-coal fired two-pass boilers (two types), a single-pass subcritical (a tower shape) boiler and CFB boiler. Mechanisms of deposit formation and basics of deposit modeling are shortly discussed. An own approach to predict...
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