Singh, Gulab, Deng, Tong ORCID: 0000-0003-4117-4317 , Bradley, Michael and Ellis, Richard (2023) Evaluation and calibration of wood pellets degradation using a rotary impact tester against single-bend attrition tester. In: 14th International Conference on Bulk Materials Storage, Handling and Transportation, 11th - 13th July 2023, Wollongong, New South Wales, Australia.

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Abstract

Wood pellets are an alternative fuel for sustainable heat and power generation. For domestic-scale heat applications, pellets are often unloaded from supply trucks using pneumatic conveying. Pellet degradation in the conveying pipeline is an unfavourable phenomenon that has both operational and health effects. The bends installed for the conveying pipeline routing are mostly to blame for the degradation. The many different multibend conveying systems and various operating conditions make it challenging to predict the overall level of pellet deterioration likely in a system. In this study, a rotary impact tester was utilised for the evaluation of wood pellet degradation. This provides a straightforward testing approach utilising a small quantity of pellets. However, for the degradation analysis, the test conditions used in the bench-scale tester must match to the real conveying conditions in the pipe bend. To calibrate the test conditions for the degradation analysis in the bench-scale tester, a pilot-scale single bend pneumatic conveyor was used, which simulates one conveying pipe bend in an industrial conveying system. It was found that the original design of rotary impact tester overpredicts the degradation due to disagreement of testing conditions against single-bend attrition tester. However, the rotary impact tester exhibits a close prediction of the degradation in the single bend pneumatic conveyor when used with a specifically designed impact target having closely set impact angle, impact velocity and particle concentration. This work thus illustrates that, if the impact conditions can be matched, the bench-scale rotary impact tester can be employed for the degradation analysis of particulate materials in pneumatic conveying systems.

Item Type:	Conference or Conference Paper (Paper)
Uncontrolled Keywords:	particle breakage; comminution; pneumatic conveying; wood pellets; biomass
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Engineering (ENG) Faculty of Engineering & Science > Wolfson Centre for Bulk Solids Handling Technology
Related URLs:	Publisher
Last Modified:	08 Dec 2023 16:40
URI:	http://gala.gre.ac.uk/id/eprint/43695

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