维普中文期刊产品整合服务

Experimental Study on Structural Optimization of a Supercritical Circulating Fluidized Bed Boiler with an Annular Furnace and Six Cyclones

查看全文 作　　者：WANG [1,2]Xiaofang;SHUAI [1,2]Daping;LYU [1,2]Qinggang 高影响力作者 机构地区：[1]Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;[2]University of Chinese Academy of Sciences, Beijing 100049, China高影响力机构 出　　处：《Journal of Thermal Science》索引2017年第26卷第5期,共11页高影响力期刊 基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences,Grant No.XDA07030100 摘　　要：Annular furnace CFBs with six cyclones represent new designs for large capacity CFB boilers over 660 MW. To investigate the gas-solid flow non-uniformity and its main influencing factors, an experimental study was carried out in the cold-test rig of an annular furnace CFB with six cyclones. The influence of furnace structure and cyclone arrangement on the non-uniformity of gas-solid flow was obtained. On the basis of these findings, the structure of the annular furnace CFB with six cyclones was optimized, and an optimal structure was obtained. The results show that for newly designed annular furnace CFBs, the non-uniformity of gas-solid flow among loops is no greater than that of traditional CFBs. In terms of uniformity, side cyclones rotating inward are superior to those rotating outward. The position of the side cyclones determines the basic solid circulating rate distribution trend and can dramatically improve flow non-uniformity. The middle cyclone positions and the symmetric modes of the cyclones do not determine the solid circulating rate distribution trend and have less effect on DEVGs. Forty-five degree chamfers of outer ring walls can reduce wall erosion and the non-uniformity of gas-solid flow in the circulating fluidized bed. Regarding the operating and structural conditions in this work, the optimal structure of annular furnace CFBs is Type 6: side cyclones rotating inward and b = a/2, d = 0.1c; the center of the middle cyclone inlet located at the centerline of the furnace cross-section; cyclones on the two sides of the furnace in an axisymmetric arrangement; and a furnace corner shape of 45° chamfers. Under the given operating conditions, the DEV_(Gs) for the optimal structure are approximately 4.0%~10.3%. 关 键 词：循环流化床锅炉 优化试验 锅炉结构 环形炉 旋流器 气固两相流动 超临界 固体循环速率
相关文献

参考文献(20)

引证文献(2)

耦合文献(47)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费