Characteristics of pressure with respect to heterogeneous flow structure in fluidized beds
文献类型：期刊论文
| 作者 | Xu, GW; Nomura, K; Bai, YR; Sun, GG; Nakagawa, N; Li, JH; Kato, K |
| 刊名 | JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
 |
| 出版日期 | 1998-04-01 |
| 卷号 | 31期号:2页码:236-243 |
| 关键词 | pressure heterogeneous flow structure fluidized bed hydrodynamics lateral movements |
| ISSN号 | 0021-9592 |
| 其他题名 | J. Chem. Eng. Jpn. |
| 中文摘要 | The characteristics of pressure in gas/solids fluidization is measured with respect to the heterogeneous structure typified as lateral core/annulus segregation and local two-phase coexistence. Experiments are carried out in two circulating fluidized bed risers with bed diameters of 0.09 m and 0.15 m, respectively. Particles FCC (Geldart A) and silica sand (Geldart B) are used in the experiment, and are fluidized by air. It is found that the dynamic changes of the particle-rich dense phase (clusters or emulsion) and the fluid-rich dilute phase (broth or bubbles), as well as the alternations between these two distinct phases, can create a serious imbalance of instantaneous pressures among different radial locations at a same bed height. However, only a subtle time-mean pressure difference can be detected between the bed wall and the bed center with the higher pressure residing on the bed wall. It is observed that this wall-to-axis pressure difference is less than 30 Pa in a typical fast fluidized bed, while it reaches at most about 150 Pa for usual bubbling fluidization, The intra-phase pressures in both the dense phase and the dilute phase are also demonstrated to be subject to a dynamic variation other than a particular relation. |
| 英文摘要 | The characteristics of pressure in gas/solids fluidization is measured with respect to the heterogeneous structure typified as lateral core/annulus segregation and local two-phase coexistence. Experiments are carried out in two circulating fluidized bed risers with bed diameters of 0.09 m and 0.15 m, respectively. Particles FCC (Geldart A) and silica sand (Geldart B) are used in the experiment, and are fluidized by air. It is found that the dynamic changes of the particle-rich dense phase (clusters or emulsion) and the fluid-rich dilute phase (broth or bubbles), as well as the alternations between these two distinct phases, can create a serious imbalance of instantaneous pressures among different radial locations at a same bed height. However, only a subtle time-mean pressure difference can be detected between the bed wall and the bed center with the higher pressure residing on the bed wall. It is observed that this wall-to-axis pressure difference is less than 30 Pa in a typical fast fluidized bed, while it reaches at most about 150 Pa for usual bubbling fluidization, The intra-phase pressures in both the dense phase and the dilute phase are also demonstrated to be subject to a dynamic variation other than a particular relation. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | REGIMES ; MODEL |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000073735000010 |
| 公开日期 | 2013-11-15 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/5874]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Gunma Univ, Dept Biol & Chem Engn, Kiryu, Gumma 376, Japan 2.Acad Sinica, Inst Chem Met, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, GW,Nomura, K,Bai, YR,et al. Characteristics of pressure with respect to heterogeneous flow structure in fluidized beds[J]. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN,1998,31(2):236-243. |
| APA | Xu, GW.,Nomura, K.,Bai, YR.,Sun, GG.,Nakagawa, N.,...&Kato, K.(1998).Characteristics of pressure with respect to heterogeneous flow structure in fluidized beds.JOURNAL OF CHEMICAL ENGINEERING OF JAPAN,31(2),236-243. |
| MLA | Xu, GW,et al."Characteristics of pressure with respect to heterogeneous flow structure in fluidized beds".JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 31.2(1998):236-243. |
入库方式： OAI收割
来源：过程工程研究所
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