Buildup of high particle flux and high solid density circulating conveying flow
文献类型：会议论文
| 作者 | Liu, Xinhua1; Sun, Guang1,3; Sun, Guogang3; Suda, Toshiyuki2; Xu, Guangwen1 |
| 出版日期 | 1905-06-30 |
| 会议日期 | May 13, 2008 - May 16, 2008 |
| 会议地点 | Hamburg, Germany |
| 关键词 | Air - Silica - Silica sand - Conveying - Proven reserves - Fluidized beds - Fluidized bed process |
| 英文摘要 | Gasification of coal and biomass is in pursuit of the technologies based on dual bed combination and high-density transport bed. Dual fluidized bed gasification (DFBG) relies on rapidly circulating sufficiently more particles between the combustor and the gasifier to provide the gasification reaction endothermic heat. High-density transport bed gasification (HTBG) has to work with high density of particles inside the transport bed gasifier in order to increase the bed heat reserve and to suppress tar evolution with gasification. By coupling a moving bed to the bottom section of the riser (i.e., conveying column), the present article built and managed a high particle flux and a high solid density in the riser of a newly designed circulating fluidized bed. Tests in the 12 m tall, 90 mm diameter riser utilizing silica sand of 378 渭m as the fluidizing material showed that the new bed configuration allowed solids circulation rate of up to 400 kg/(m2s), which corresponds to a mass ratio of solid to gas of about 35, and the explicit local solid holdup of up to 0.3 at the riser bottom to be realized simultaneously at the superficial gas velocity of about 9.0 m/s in the riser. The results demonstrated also that the particle circulation rate and local solid holdup in the riser were highly dependent on moving bed aeration and primary gas velocity in the riser, while the secondary air injection had only a slight effect on the circulation rate. |
| 资助机构 | TuTech Innovation GmbH, Harburger Schlosstrabe 6-12, D-21079 Hamburg, D-21079, Germany |
| 会议录 | 9th International Conference on Circulating Fluidized Beds, CFB 2008, in Conjunction with the 4th International VGB Workshop on Operating Experience with Fluidized Bed Firing Systems
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| 学科主题 | Gasification |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/59581]  |
| 作者单位 | 1.National Key Laboratory of Multi-Phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China 2.IHI Corporation, Ltd., Shin-Nakahara-Cho 1, Isogo-ku, Yokohama 235-8501, Japan 3.Faculty of Chemical Engineering, China University of Petroleum (Beijing), Beijing 102249, China |
| 推荐引用方式 GB/T 7714 | Liu, Xinhua,Sun, Guang,Sun, Guogang,et al. Buildup of high particle flux and high solid density circulating conveying flow[C]. 见:. Hamburg, Germany. May 13, 2008 - May 16, 2008. |
入库方式： OAI收割
来源：过程工程研究所
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