文献类型：会议论文

英文题名：Furnace firing control: The key to extending your run length

作者：Vervust, Alexander J.[1]; Zhang, Yu[1,2]; Qian, Feng[2]; Reyniers, Pieter A.[1]; Schietekat, Carl M.[1]; Van Geem, Kevin M.[1]; Marin, Guy B.[1]

机构：[1] Laboratory for Chemical Technology, Ghent University, Belgium; [2] Key Laboratory of Advanced Control and Optimization, East China University of Science and Technology, China

会议论文集：27th Ethylene Producers Conference 2015 - Topical Conference at the 2015 AIChE Spring Meeting and 11th Global Congress on Process Safety

会议日期：April 26, 2015 - April 30, 2015

会议地点：Austin, TX, United states

语种：英文

外文关键词：Computational fluid dynamics - Heat flux

摘要：Control and regulation of furnace firing is essential to extend the runiength of new and existing furnaces. Accurate Computational Fluid Dynamic simulations of the furnace are essential for this purpose. This requires among others accounting for the detailed geometry of the burners. Also the so-called "shadow effect" 6 arising from the projected shadows between adjacent reactors leads to significant heat flux non-uniformities. This phenomenon is important but its effect on product yields is often ignored as only a single reactor is simulated. For the USC furnace simulated in this work, shadow effects cause a maximum difference in COT of 29 K and a difference in P/E-ratioof 0.1 between two different U-coils in the furnace. In order to obtain more uniform TMT's, COTs and olefin yields for the individual reactors, different furnace optimization methods were compared and their results are discussed. Full furnace CFD simulations prove to be essential in design and during debottlenecking, when aiming for a more uniform COT distribution to the reactors by fuel distribution.