导流板对喷雾流化床内颗粒生长过程影响的模拟  

Simulation of effect of draft plate on particle growth process in spray fluidized beds

作　　者：邓爱明 何玉荣[1,2,3] 唐天琪 胡彦伟 DENG Aiming;HE Yurong;TANG Tianqi;HU Yanwei(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China;Heilongjiang Key Laboratory of New Energy Storage Materials and Processes,Harbin 150001,Heilongjiang,China;Zhengzhou Research Institute,Harbin Institute of Technology,Zhengzhou 450000,Henan,China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [2]黑龙江省新型储能材料与储能过程研究重点实验室,黑龙江哈尔滨150001 [3]哈工大郑州研究院,河南郑州450000

出　　处：《化工学报》2024年第8期2787-2799,共13页CIESC Journal

基　　金：国家自然科学基金面上项目(52076059)。

摘　　要：喷雾流化床内湿法造粒过程已广泛应用于能源、制药、食品和化工等各种工业领域,然而流化床中的颗粒生长过程涉及到复杂的气-液-固三相相互作用,进而难以实现造粒过程的精确控制。基于离散单元模型,通过添加液桥力模型和颗粒生长模型开展喷雾流化床内导流板结构对床内颗粒流动和生长特性影响的研究,分析颗粒流化状态对颗粒生长均匀性的影响。研究发现,在本文工况内,随着床内导流板长度的增加、导流板间距和高度的降低,颗粒流化状态得到改善,颗粒生长区域进一步扩大,颗粒循环时间增加,单次颗粒涂层增长量降低,颗粒生长得更均匀。The wet granulation process in the spray fluidized bed is widely used in various industrial sectors,such as energy,pharmaceutical,food,and chemical industries.However,the granular growth process in the fluidized bed involves the interaction of complex gas-liquid-solids,and it is difficult to achieve precise control of the granular process.Therefore,based on the discrete element model,the influence of the draft plate structure in the spray fluidized bed on the flow and growth characteristics of particles in the bed was studied by adding the liquid bridge force model and the particle growth model.The influence of the particle fluidization state on the uniformity of particle growth was analyzed.The results indicate that increasing the lengths of the draft plates in the fluidized bed or decreasing the gaps and heights of the draft plates enhances the fluidization state of the particles,extends the particle growth area,lengthens the particle cycle times,inhibits the growth of a single particle coating,and improves the uniformity of particle growth.

关 键 词：流化床 造粒 数值模拟 导流板 

分 类 号：TQ051.13[化学工程]