Prediction of coking dynamics for wet coal charge

• Authors: Dariusz Kardaś , Sylwia Polesek-Karczewska , Przemysław Ciżmiński , Sławomir Stelmach
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

pyrolysis; devolatilisation; vaporisation; internal gas pressure

• Publisher: De Gruyter Open
• Journal: Chemical and Process Engineering
• Year: 2015
• Volume: 36
• Issue: 3
• Pages: 291-303

Dates

published

1 - 9 - 2015

received

16 - 9 - 2014

revised

3 - 5 - 2015

accepted

30 - 7 - 2015

online

5 - 11 - 2015

Contributors

author

Dariusz Kardaś

• Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk

author

Sylwia Polesek-Karczewska

• Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk

author

Przemysław Ciżmiński

• Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk
• Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk

author

Sławomir Stelmach

• Institute for Chemical Processing of Coal, Zamkowa 1, 41-803 Zabrze

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Identifiers

DOI

10.1515/cpe-2015-0020