SIMULATION STUDY ON THE CHARACTERISTICS OF TWO-STAGE ENTRAINED FLOW GASIFIERS VIA TWO-FLUID HYDRODYNAMIC MODELS
IntroductionThe gasification industry has identified improved performance of entrained flow gasifiers as a requirement for Integrated Gasification Combined Cycle (IGCC) power plants to be commercially viable. Review papers by Ni 1 and Elseviers 2 identified several items that could lead to improved reliability,availability and maintainability of solid fuel gasifiers. Gasifiers involve complex physical and chemical phenomena including fluid flow, heat and mass transfer, and chemical reactions. Through gasification, coal is reacted to form CO/II2 rich syngas that undergoes processing before entering gas turbines or fuel cells.Better understanding of how these are impacted by operational changes such as fuel type, slurry content and oxidizer flow would be highly beneficial. As described below, a brief overview of the basic CFD model is provided, being followed by the analysis of the model tool,which is being enhanced in order to account for high pressure effects on the reaction kinetics, high particle loading, and slagging walls. Although the focus is placed on oxygen blown pressurized systems, the same model could be used for air blown and/or atmospheric systems. At last, the gasifier models will provide a tool that can be used to address a broad range of gasifier issues, including syngas composition, quality, carbon content in the raw-gas and slag, temperature distribution and pressure scaling in the gasifier.
Hongyue Wang Lingling Zhao Lihua Xu Hyunmin Shim Zhigao Xu Hyungtaek Kim
Division of Energy System Research Ajou University Suwon 443749, Korea College of Energy and Environment,Southeast University,Nanjing 210096, China
国际会议
The 7th China-Korea Workshop on Clean Energy Technology(第七届中韩清洁能源技术研讨会)
太原
英文
11-12
2008-06-25（万方平台首次上网日期，不代表论文的发表时间）