基于离散元法的生物质热解螺旋抄板优化设计与试验

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中图分类号：S776 文献标识码：A DOI：10.7525/j.issn.1006-8023.2025.04.017

Abstract： Inrecent years，biomass pyrolysis equipment has emergedasafocal pointofresearch inthe globalenergy sector.To ackle challenges such asuneven material heating andaccumulation at the tail section commonlyobserved in fixed-bed pyrolysis systems，this study focuses onoptimizing andanalyzing theperformanceof spiral combined flights，a keycomponent in fixed-bedreactors.Anovel variable-pitch combinedflightsstructure was designed，anditscritical parameters were systematicallydetermined.Using Altair EDEM simulations，the effects of rotational speedand equipment inclination angleon the discharge rate were evaluated，and the simulationoutcomes were validated through experiments. Simulationresults demonstratedthatthe variable-pitchcombinedflightsstructure effctivelyliftedmaterialsandredirected tail-end accumulation towards the discharge outlet，enabling uniform heating andresolving the isue of particle buildupatthetail.Meanwhile，theinclinationangle exertedasignificantlystronger influenceonthedischargerate，with a between-group to within-group mean squareratioof 240.OO，farsurpassing theratioof 25.60 observedforrotational speed.Experimental results aligned closely with the simulations，yielding a correlation coeficientof 0.998 7.

Keywords：Biomass；spiralcombined flight；discrete elements；optimization design；correlation analysis

0引言

机问题，减少温室气体排放，并有助于减轻全球变暖和环境污染等问题[1]。（剩余10883字）