Agglomeration in Spray Drying Installations (The EDECAD Project): Stickiness Measurements and Simulation Results
Agglomeration in Spray Drying Installations (The EDECAD Project): Stickiness Measurements and Simulation Results
复制标题
喷雾干燥装置中的团聚（EDECAD 项目）：粘性测量和模拟结果
DOI：
10.1080/07373930600684973
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发表时间：
2006
影响因子：
3.3
通讯作者：
J. Straatsma
中科院分区：
文献类型：
--
作者：
R. Verdurmen;G. Houwelingen;M. Gunsing;M. Verschueren;J. Straatsma
喷雾干燥用于制造许多消费品和工业产品，如速溶乳制品和食品，洗衣洗涤剂，药品，陶瓷和农用化学品。在喷雾干燥过程中，粉末颗粒的结块形成，这决定了粉末的即时性能。喷雾干燥过程中的结块被认为是一个难以控制的过程。造成这种情况的主要原因是过程变量的复杂相互作用：雾化过程，喷雾和热空气的混合，悬浮液滴的干燥，以及颗粒的碰撞，这些都可能导致聚结或团聚。因此，喷雾干燥过程中的结块是通过反复试验来操作的。在欧洲委员会资助的EDECAD项目中，由NIZO食品研究中心协调，开发了一个工业验证的计算机模型，使用CFD技术来预测喷雾干燥机中的结块过程。欧拉-拉格朗日方法与适当的基本模型的干燥，碰撞，聚并，和团聚的分散相使用。EDECAD项目的主要成果是一个所谓的设计工具，它建立了干燥装置的配置（几何形状、喷嘴选择）、工艺条件、产品成分和最终粉末性能之间的关系。该设计工具已在中试工厂规模和工业规模上得到验证。本文介绍了动态粘性试验的设置和结果，以及一些CFD模拟和验证结果。
Spray drying is used for the manufacture of many consumer and industrial products such as instant dairy and food products, laundry detergents, pharmaceuticals, ceramics, and agrochemicals. During spray drying, agglomerates of powder particles are formed that determine the instant properties of the powder. Agglomeration during spray drying is considered to be a difficult process to control. The main cause of this is the complex interaction of the process variables: the atomization process, the mixing of spray and hot air, the drying of suspension droplets, and the collision of particles, which might lead to coalescence or agglomeration. As a consequence, agglomeration during spray drying is operated by trial and error. In an EC-sponsored project, named the EDECAD project and coordinated by NIZO food research, an industrially validated computer model, using CFD technology, to predict agglomeration processes in spray drying machines is developed. A Euler-Lagrange approach with appropriate elementary models for drying, collision, coalescence, and agglomeration of the dispersed phase is used. The main result of the EDECAD project is a so-called design tool, which establishes relations between the configuration of the drying installation (geometry, nozzle selection), process conditions, product composition, and final powder properties. The design tool has been validated on pilot plant scale and industrial scale. This article presents the setup and results of dynamic stickiness tests and some CFD simulation and validation results.