- Tytuł:
- Dielectric properties of coal ash
- Autorzy:
-
González Valdes, Laura
Friis Aage, Valentin
Nowak-Woźny, Dorota - Powiązania:
- https://bibliotekanauki.pl/articles/1818164.pdf
- Data publikacji:
- 2018
- Wydawca:
- Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
- Tematy:
-
coal
mineral matter transformation
ash sintering
dielectrical properties - Opis:
- Mineral matter of coal causes serious operational problems related to ash de- position in coal fired power plants such slagging and fouling, and so it has become the main subject of study in terms of current utilization. Moreover, the standardized tests currently used as the preferred predictive tools for slagging properties of coal sources have been lately reproved in the literature and un- certainties arrive due to the poor repeatability and reproducibility. That is why, methods for determining the sintering temperatures are being extensively investigated across the industry. This study focuses on the electrical properties of coal ash and its relation to the ash sintering process, where physical and chemical processes take part inside the material. The following methodology is based upon the continuous registration of the changes of resistance measured as an AC and DC property. The proposed laboratory stand allows measuring ‘in situ’ a coal ash sample being heated to analyse its electrical properties. It was found that the values measured are temperature dependent and could reflect the chemico-physical changes in the material, which may directly suggest the transformation of the intrinsic properties, giving insight into the sintering process.
- Źródło:
-
Zeszyty Energetyczne; 2018, 5; 51--60
2658-0799 - Pojawia się w:
- Zeszyty Energetyczne
- Dostawca treści:
- Biblioteka Nauki
Artykuł