- Tytuł:
- Prediction of coking dynamics for wet coal charge
- Autorzy:
-
Kardaś, D.
Polesek-Karczewska, S.
Ciżmiński, P.
Stelmach, S. - Powiązania:
- https://bibliotekanauki.pl/articles/185719.pdf
- Data publikacji:
- 2015
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
pyrolysis
devolatilisation
vaporisation
internal gas pressure
piroliza
odparowanie
wewnętrzne ciśnienie gazu - Opis:
- A one-dimensional transient mathematical model describing thermal and flow phenomena during coal coking in an oven chamber was studied in the paper. It also accounts for heat conduction in the ceramic oven wall when assuming a constant temperature at the heating channel side. The model was solved numerically using partly implicit methods for gas flow and heat transfer problems. The histories of temperature, gas evolution and internal pressure were presented and analysed. The theoretical predictions of temperature change in the centre plane of the coke oven were compared with industrialscale measurements. Both, the experimental data and obtained numerical results show that moisture content determines the coking process dynamics, lagging the temperature increase above the water steam evaporation temperature and in consequence the total coking time. The phenomenon of internal pressure generation in the context of overlapping effects of simultaneously occurring coal transitions – devolatilisation and coal permeability decrease under plastic stage – was also discussed.
- Źródło:
-
Chemical and Process Engineering; 2015, 36, 3; 291-303
0208-6425
2300-1925 - Pojawia się w:
- Chemical and Process Engineering
- Dostawca treści:
- Biblioteka Nauki
Artykuł