Dust Distribution Study at the Blast Furnace Top Based on k-Sε-up Model

• 作者: Zhipeng Chen Zhaohui Jiang Chunjie Yang Weihua Gui Youxian Sun
• 来源期刊: 自动化学报（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: PAPERS
• 页码范围: 121-135
• 页数: 15页
• 语种: 英文
• DOI: 10.1109/JAS.2020.1003468

摘要

The dust distribution law acting at the top of a blast furnace (BF) is of great significance for understanding gas flowdistribution and mitigating the negative influence of dust particleson the accuracy and service life of detection equipment. Theharsh environment inside a BF makes it difficult to describe thedust distribution. This paper addresses this problem by proposinga dust distribution k-Sε-u p model based on interphase (gas-powder) coupling. The proposed model is coupled with a k-Sεmodel (which describes gas flow movement) and a modelup(which depicts dust movement). First, the kinetic energy equationand turbulent dissipation rate equation in the k-Sε model areestablished based on the modeling theory and single-Green-function two-scale direct interaction approximation (SGF-TSDIA)theory. Second, a dust particle movement model is built basedupon a force analysis of the dust and Newton's laws of motion.Finally, a coupling factor that describes the interphase interactionis proposed, and the k-Sε-u p model, with clear physical meaning,rigorous mathematical logic, and adequate generality, isdeveloped. Simulation results and on-site verification show thatthe k-Sε-u p model not only has high precision, but also revealsthe aggregate distribution features of the dust, which are helpfulin optimizing the installation position of the detection equipmentand improving its accuracy and service life.