摘要
为量化表征生活垃圾料层在机械炉排上焚烧时出现的料层混合和分层现象,提出包含3种不同尺寸颗粒的垃圾料层离散单元模型,引入混合系数和分层系数表征料层整体混合强度和分层强度,基于离散单元法分析可动炉排工艺参数(运动幅度和往复频率)对料层混合强度和分层速度的影响.结果表明,料层内部组分混合主要发生在料层推进方向和高度方向,其混合强度与炉排工艺参数呈二元线性关系;料层内部组分分层区域与其组分尺寸相关,大颗粒趋于集中在料层顶部区域而小颗粒趋于集中在底部,其分层速度与炉排工艺参数呈二元非线性关系.研究结果为生活垃圾的高效焚烧与焚烧设备的工艺改进提供了有效设计参考.
In order to quantitatively characterize the mixing and segregation phenomenon of municipal solid waste(MSW) layer incinerated on a mechanical grate, an MSW layer model containing three different sizes of particles is established based on the discrete element method, and the mixing index and segregation index are introduced to characterize the mixing intensity and segregation intensity. Furthermore, the influence of movable grate process parameters(movement amplitude and reciprocating frequency) on the mixing intensity and segregation speed is analyzed based on the discrete element method. The results show that the mixing of the MSW layer mainly occurs along the layer’s advancing direction as well as the height of the layer, and a binary linear relationship between mixing intensity and process parameters is found. The segregation of the MSW layer is related to the component size. The larger the size of the component, the more concentrated in the top area of the material layer;and a binary nonlinear relationship between segregation speed and process parameters is found. The conclusion above provides an effective design reference for the efficient incineration of MSW and the optimization of incineration equipment.
作者
姜涛
王洁华
刘海洋
张智
JIANG Tao;WANG Jiehua;LIU Haiyang;ZHANG Zhi(School of Mechanical Engineering,Tongji University,Shanghai 201804,China;Shanghai Environmental Sanitation Engineering Design Institute Co.,Ltd,Shanghai 200232,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2022年第6期1-8,共8页
Journal of Hunan University:Natural Sciences
基金
国家重点研发计划资助项目(2018YFC1901200)
上海市科研计划项目(18DZ1202601)
上海市青年科技英才扬帆计划(19YF1420800)。
关键词
城市生活垃圾
离散单元法
混合
分层
municipal solid waste
discrete element method
mixing
segregation
作者简介
姜涛(1969-),男,同济大学副教授,博士生导师,博士;通信联系人:王洁华,E-mail:18201956230@163.com。
