文献类型：期刊文献

英文题名：Particle fragmentation behavior in a bench scale entrained-flow coal-water slurry gasifier

作者：Guo, Qinghua[1]; Yu, Guangsuo[1]; Wang, Yifei[1]; Gong, Xin[1]

机构：[1] Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai, 200237, China

年份：2016

卷号：2016-August

外文期刊名：33rd Annual International Pittsburgh Coal Conference: Coal - Energy, Environment and Sustainable Development, PCC 2016

收录：EI(收录号：20182105233193)

语种：英文

外文关键词：Slags - Coal - High speed cameras - Coal gasification - Particle size - Size distribution - Planning - Sustainable development - Video cameras

摘要：Fragmentation behavior of coal char particles in an entrained-flow coal-water slurry gasifier is essential for the gasifier slag discharging process and the downstream syngas primary clean-up system. The phenomenon of particle fragmentation process occurring in the gasifier captured by a high speed video camera on a bench scale opposed multi-burner (OMB) gasifier illustrated that the secondary fragmentation behavior exists in the entrained-flow gasifier after the particles moving from high temperature impinging flame region to the gasification chamber outlet region. Particles larger than 200 μm in the impinging flame region have porosity structures with fragile shapes, while most of the particles smaller than 100 μm have spherical shapes. As long as the coal char particles move from the impinging flame region toward the gasification chamber outlet region, the primary fragmentation is almost finished in the impinging flame region and the secondary fragmentation is probably taken place as a result of percolative fragmentation and undergoing gasification reactions. The particle size distributions under different oxygen to carbon ratios (O/C) also indicate that there has a significant fragmentation when the particle size is larger than 200 μm. ? 2016 International Pittsburgh Coal Conference. All rights reserved.