Process Modeling for dynamic particle separation processes

动态颗粒分离过程的过程建模

• 批准号: 238732694
• 负责人: Professor Dr.-Ing. Udo Fritsching
• 金额: --
• 依托单位: Abteilung Verfahrenstechnik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/238732694?language=en
• 关键词: Process; Modeling; dynamic; particle; separation

Modules for flow sheet simulation (FSS) of separation and precipitation inside electrostatic precipitators are implemented into the framework developed within the SPP1679. Hereby, numerical and experimental particle analysis derive precipitation and redispersion functions, that allow scaling based on process parameters, geometry variation and material properties.In the first and second phases of the project, application of model materials (Ulmer Weiß and Pural NF) demonstrated material dependent dynamic precipitation. Microscope analysis of representative samples extracted from the separation wall of the precipitator revealed unequal surface structures for these materials. Ulmer Weiß builds a time independent smooth surface while Pural NF layers roughen continuously throughout the process. Simulative results display the particle reliant effective electric field and its influence on the separation curve. These fields change their amplitude and form according to the electrode design. The macroscopic FSS model matches the CFD separation curves by including an effective field parameter for each geometry.In the projects third period in focus are facility dynamics and scaling to industrial facility sizes, material systems and climatic conditions. The flow sheet process model is extended, whereby internal process dynamics are represented by particle re-entrainment from layers.The derived process modules are implemented into the frame work developed in the course of the SPP 1679 (Z project). The model should show that dynamic separation processes are representable in FSS by functions of facility, process conditions and material.

静电除尘器内部分离和沉淀的流程模拟 (FSS) 模块已实施到 SPP1679 内开发的框架中，因此，数值和实验颗粒分析得出沉淀和再分散函数，从而可以根据工艺参数、几何变化和材料进行缩放。在该项目的第一和第二阶段，模型材料（Ulmer Weiß 和 Pural NF）的应用证明了对从除尘器的分隔壁提取的代表性样品的材料依赖性动态沉淀。 Ulmer Weiß 揭示了这些材料的不均匀表面结构，而 Pural NF 层在整个过程中不断变粗糙，显示了粒子依赖的有效电场及其对分离曲线的影响。根据电极设计，宏观 FSS 模型通过包含每个几何形状的有效场参数来匹配 CFD 分离曲线。该项目第三阶段的重点是设施动态和工业设施规模、材料系统和气候条件的缩放。流程图过程模型得到扩展，内部过程动态由层中的颗粒再夹带来表示。派生的过程模块被实施到 SPP 1679（Z 项目）过程中开发的框架中。该模型应显示动态。分离过程在 FSS 中通过设施、过程条件和材料的功能来表示。