Comparison of Two Coal-Gasifier-Designs with Moving-Bed and Internal-Circulating-Fluidized-Bed Configuration in One Reactor
Martin Schurz*, Alexander Laugwitz, Steffen Krzack, Bernd Meyer
Department of Energy Process Engineering and Chemical Engineering, TU Bergakademie Freiberg, Fuchsmühlenweg 9, Reiche Zeche, 09596 Freiberg, Germany
Coal gasification is the promising technology for syngas routes to produce
chemicals or transportation fuels. Additionally, it enables clean power generation from coal in
Integrated Gasification Combined Cycles (IGCC). So far, coal fines with high ash contents
could not be feasibly used in such routes.
In this regard, the Internal Circulation gasifier (INCI) is designed to gasify high-ash coal
fines efficiently. The staged system is combining a moving bed, a fluidized bed and a jetting
fluidized bed in one reaction chamber.
The present paper substantially describes the laboratory-scale prototype development in the
COORVED-project (“CO2-reduction by innovative gasifier design”) based on the INCI
gasification principle of about 50-125 kW thermal input. Information about the gasifiers
compounding, especially the reaction chamber, peripheral components and applied
measurement systems are given.
Experimental results are presented, confirming the targeted, typical flow pattern
inside the reaction chamber. Furthermore technical and operational limits of the COORVED
prefiguration are discussed. Based on these results a major design change of the reaction
chamber is required and explained in detail. Additionally, results of the feedstock variation
from coke to lignite are shown.
Finally, the operability of the INCI gasification principle is proven by a
stationary operating system with controlled ash agglomeration.
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* Address correspondence to this author at Department of Energy Process Engineering and Chemical Engineering, TU Bergakademie Freiberg, Fuchsmühlenweg 9, Reiche Zeche, 09596 Freiberg, Germany; Tel: +49-(0)3731-39 4483; E-mail: email@example.com