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Mathematical modelling of heat transfer in dedusting plants and comparison to off-gas measurements at electric arc furnaces

Title data

Kirschen, Marcus ; Velikorodov, Viktor ; Pfeifer, Herbert:
Mathematical modelling of heat transfer in dedusting plants and comparison to off-gas measurements at electric arc furnaces.
In: Energy. Vol. 31 (2006) Issue 14 . - pp. 2926-2939.
ISSN 0360-5442
DOI: https://doi.org/10.1016/j.energy.2005.12.006

Abstract in another language

A mathematical simulation tool is presented in order to model enthalpy flow rates of off-gas and heat transfer of cooling systems at dedusting plants in electric steel making sites. The flexibility of the simulation tool is based on a user-defined series of modular units that describe elementary units of industrial dedusting systems, e.g. water-cooled hot gas duct, air injector, drop-out box, mixing chamber, post-combustion chamber, filter, etc. Results of simulation were checked with measurements at industrial electric steel making plants in order to validate the models for turbulence, heat transfer and chemical reaction kinetics. Comparison between computed and measured gas temperature and composition yield excellent agreement. The simulation tool is used to calculate off-gas temperature and volume flow rate, where off-gas measurements are very difficult to apply due to high gas temperatures and high dust load. Heat transfer from the off-gas to the cooling system was calculated in detail for a pressurised hot water EAF cooling system in order to investigate the impact of the cooling system and the dedusting plant operation on the energy sinks of the electric arc furnace. It is shown that optimum efficiency of post-combustion of EAF off-gas in the water-cooled hot gas duct requires continuous off-gas analysis. Common operation parameters of EAF dedusting systems do not consider the non-steady-state of the EAF off-gas emission efficiently.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Steel making; Electric arc furnace; Dedusting plant; Mathematical simulation; Heat transfer
Institutions of the University: Faculties > Faculty of Engineering Science
Research Institutions > Affiliated Institutes > Fraunhofer Center for High Temperature Materials and Design (HTL)
Result of work at the UBT: No
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 14 Jun 2019 08:17
Last Modified: 14 Jun 2019 08:17
URI: https://eref.uni-bayreuth.de/id/eprint/49530