Verfahrenstechnische Untersuchungen zur Schnellpyrolyse von Lignocellulose im Doppelschnecken-Mischreaktor

Kornmayer, C.

doi:10.5445/ir/1000015334

Cited by 1 publication

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“…The frequencies that were simulated ranged from 0.75 to 12 Hz. The parameters for the bulk material derived from earlier works and are listed in Table . , Most of the experiments were done with steel spheres only because the computation times when biomass was included were much longer than without. In general, it is expected that the particle size should not have a big influence on the axial speed of the individual particles, but at least for powders, different levels of compressibility seem to have one on the mass flow .…”

Section: Methodsmentioning

confidence: 99%

Numerical Validation of a Screw Conveyor Design Method

Aschenbrenner,

Funke

2024

Energy Fuels

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Screw conveyors and feeders are a common way to transport a variety of granular bulk material. There is also the possibility of using them as reactors themselves, where they represent an interesting alternative to other common reactor types, for example, the pyrolysis of biomass or plastics. However, the scale-up and design of screw conveyors remains a challenging topic. Even though the fundamental design has been applied for several decades, things like granular mixing and transport are still not fully understood. A lot of the research on the transport of screw conveyors is focused on single-screw setups. This leads to the reliance on empirical data or in-house experience for conveyor design. For that reason, it is important to develop reasonable guidelines and design tools that are based on scientific principles, which can be further validated by experiments and simulations. In this work, findings from a dimensional analysis are combined with auger reactor design criteria that were developed in the 1960s based on extensive experimental work and that were only available in the German literature up until now, and the resulting assumptions are then tested with the help of discrete element method simulations.

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