摘要
为改善土壤一体机内破碎混拌设备的颗粒混匀效果,基于混合动力学原理和离散单元法(discrete element method,DEM)计算平台,开发了污染土壤与修复药剂粉末颗粒混合过程的数值计算模型。通过研究混合体系中离散颗粒和混合部件之间的相互作用、颗粒分布和碰撞次数,设计混合均匀度、混合质量评价公式进行混匀效率的定量分析。结果表明:土壤颗粒大小和刀辊转速对土壤与药剂的混合均匀度具有重要影响,并基于此提出改进建议,以期为改善土壤修复一体机性能提供技术指导。
In order to improve the particle mixing effect in the soil integrator system,a numerical model of the mixing process with contaminated soil and remediation chemicals powder particles was developed based on the mixing kinetics principle and the discrete element method(DEM).The interaction and number of collisions between discrete particles and mixing components in the system were analyzed;the mixing uniformity and quality evaluation formulae were designed to evaluate the mixing efficiency.The influence of soil particle size and knife roller speed on the mixing uniformity of soil and remediation chemicals was analyzed quantitatively,which can provide technical guidance for improving the performance of the next-generation soil remediation all-in-one machines.
作者
颜子涵
付融冰
吴志根
YAN Zihan;FU Rongbing;WU Zhigen(College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China;Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China)
出处
《环境工程》
CAS
CSCD
北大核心
2023年第4期131-136,共6页
Environmental Engineering
基金
国家重点研发计划“土壤混合动力学及破碎混匀一体化智能装备”(2019YFC1805204)。
关键词
矿区土壤修复
固化稳定化
一体机
离散单元法
混合均匀度
soil remediation in mining areas
curing and stabilisation
all-in-one machine
discrete element method
mixing uniformity
