Development of a Dynamic Process Model for the Mechanical Fluid Separation in Decanter Centrifuges. Issue 1 (27th October 2017)

• Record Type: Journal Article
• Authors: Gleiss, Marco; Hammerich, Simon; Kespe, Michael; Nirschl, Hermann
• Is Part Of: Chemical engineering & technology. Volume 41:Issue 1(2018)
• Page Start: 19
• Page End: 26
• Publication Date: 2017-10-27
• Subjects: Decanter centrifuges -- Dynamic process model -- Model‐based control -- Real‐time simulations -- Solid‐liquid separation; Chemical engineering -- Periodicals; Chemical processes -- Periodicals; 660.05
• DOI: 10.1002/ceat.201700113
• Languages: English
• ISSNs: 0930-7516

Abstract

Abstract: A dynamic process model for the simulation of the separation process in countercurrent decanter centrifuges is presented. The numerical approach uses an interconnection of compartments to characterize the residence time distribution of the particles within the centrifuge. First, the theoretical basis of the numerical approach is described. Compared to the state‐of‐the‐art modeling of decanter centrifuges, the proposed approach allows the simulation of the temporal filling process. The short computing time results in further advantages of the dynamic process model. The so‐called real‐time simulation is an opportunity for a model‐based control of the separation process. An exemplary simulation with the product limestone demonstrates the main features of the numerical approach. Abstract : Dynamic flow sheet simulation is a common tool for design and optimization of particulate processes. State‐of‐the‐art models for numerical simulation do not reflect transient effects of the flow domain and sediment buildup. Considering the temporal filling process and residence time distribution makes the models also applicable to predict critical states which can occur during centrifuge operation.