WSEAS Transactions on Systems
Print ISSN: 1109-2777, E-ISSN: 2224-2678
Volume 19, 2020
A Mathematical Model for Control and Optimization of Industrial Rotary Alumina Kiln Process
Authors: ,
Abstract: Temperature is a crucial factor for clinker quality in the Industrial Rotary Alumina Kiln Process (IRAKP). However, the characteristic of the high temperature, complex kinetics, multivariable, non-linear reaction kinetics, long-time delayed reaction and various raw materials make it difficult to accurately control the temperature in IRAKP through an existing control technology. This paper proposes a dual-response-surface-based process control (DRSPC) system for the IRAKP in a novel manner. In the DRSPC, instead of the more precise and complicated nonlinear equations, the dual response surface models are fitted to describe the reaction kinetics in the IRAKP and track their standard deviations for stable operation purpose. Because a simultaneous consideration of multiple control targets could address the problem of unstable operation in kilns; the objectives of the DRSPC study are designed as optimizing product quality, minimizing energy consumption and temperature fluctuations. Therefore, the proposed DRSPC goals are to achieve a uniform quality clinker, a high fuel efficiency, and a long refractory life. A weight optimization approach is used to handle these multiple objective functions. The proposed DRSPC can estimate the working conditions of a kiln and predict some optimal manipulated variables to the control system in each control time interval for improving the efficiency of IRAKP. The DRSPC is applied to a real IRAKP for demonstrating its applicability and advantages.
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Pages: 198-211
DOI: 10.37394/23202.2020.19.26