循环流化床锅炉气固两相流换热研究进展

doi:10.3969/j.issn.1674-1951.2021.10.007

华电技术 ›› 2021, Vol. 43 ›› Issue (10): 61-67.doi: 10.3969/j.issn.1674-1951.2021.10.007

循环流化床锅炉气固两相流换热研究进展

谭雪梅¹(), 刘世杰¹(), 赵冰²(), 巩太义²(), 王家林²(), 胡南¹()

1.长春工程学院吉林省水利电力工程物理级仿真与安全科技创新中心,长春 130012
2.华电国际电力股份有限公司天津开发区分公司,天津 300270

收稿日期:2021-08-23 修回日期:2021-09-23 出版日期:2021-10-25 发布日期:2021-10-11
作者简介:谭雪梅（1998—）,女,湖北天门人,在读硕士研究生,从事循环流化床锅炉燃烧技术研究工作（E-mail： 1757085005@qq.com）。
刘世杰（1996—）,男,安徽铜陵人,在读硕士研究生,从事循环流化床锅炉理论与技术研究工作（E-mail： 1297594014@qq.com）。
赵冰（1981—）,男,山东平原人,工程师,从事火力发电工程管理研究工作（E-mail： 15392305@qq.com）。
巩太义（1972—）,男,山东蓬莱人,工程师,从事热能与动力工程研究工作（E-mail： 38916011@qq.com）。
王家林（1974—）,男,山西山阴人,工程师,从事热能与动力工程研究工作（E-mail： 3111940059@qq.com）。
胡南（1985—）,男,江苏泗阳人,教授,硕士生导师,工学博士,从事循环流化床锅炉理论与技术研究工作（E-mail： hn04@tsinghua.org.cn）。
基金资助:
吉林省自然科学基金项目(YDZJ202101ZYTS180);中国华电集团科技项目(CHDKJ19-01-88)

Research on heat transfer of gas-solid two-phase flow in CFB boilers

TAN Xuemei¹(), LIU Shijie¹(), ZHAO Bing²(), GONG Taiyi²(), WANG Jialin²(), HU Nan¹()

1. Jilin Province S&T Innovation Center for Physical Simulation and Security of Water Resources and Electric Power Engineering,Changchun Institute of Technology,Changchun 130012,China
2. TEDA Branch,Huadian Power International Company Limited,Tianjin 300270, China

Received:2021-08-23 Revised:2021-09-23 Online:2021-10-25 Published:2021-10-11

摘要/Abstract

摘要：

循环流化床锅炉炉内床料粒度分布较宽,气固流动属于多流态复合流动,传热过程更加复杂。分析了气固两相流在不同流态下对流换热的共性机理,总结了气固两相流动换热的影响因素、机理模型及数值模拟工作,归纳了固相对流换热、气相对流换热和辐射换热3种气固两相流传热机理的计算方法。气流速度、颗粒粒径、床层压力和温度等是影响传热的重要因素,颗粒运动特性和颗粒浓度分布对循环流化床锅炉炉内换热至关重要。在今后研究中,应针对宽筛分颗粒进一步完善现有计算模型。优化循环流化床锅炉气固两相流动换热效率,提高能源利用率,对实现碳达峰、碳中和战略目标具有重大意义。

关键词: 碳达峰, 碳中和, 循环流化床锅炉, 气固两相流, 传热机理, 换热系数, 宽筛分颗粒

Abstract:

The particle size distribution of bed materials in circulating fluidized bed （CFB） boilers is wide.Gas-solid flow,a kind of multi-fluid composite flows,is of a complicated heat-transfer process.The common heat transfer mechanism of the two-phase flow in different states is analyzed,and its influencing factors,mechanism models and numerical simulation are investigated.The calculation methods for the heat transfer mechanisms of three gas-solid two-phase flows are summarized：solid-phase flow heat transfer,gas-phase flow heat transfer and radiation heat transfer.The important influencing factors of heat transfer are air velocity,particle size,bed pressure and temperature.The particle movement characteristics and concentration distribution are crucial for the heat transfer in CFB boilers.The improvement of the current calculation model should focus on wide particle size distribution.Optimizing the heat transfer efficiency of gas-solid two-phase flow in CFB boilers can boost the energy utilization rate and facilitate the achievement of carbon peaking and carbon neutrality.

Key words: carbon peaking, carbon neutrality, CFB boiler, gas-solid two-phase flow, heat transfer mechanism, heat transfer coefficient, wide particle size distribution

中图分类号:

TK124

谭雪梅, 刘世杰, 赵冰, 巩太义, 王家林, 胡南. 循环流化床锅炉气固两相流换热研究进展[J]. 华电技术, 2021, 43(10): 61-67.

TAN Xuemei, LIU Shijie, ZHAO Bing, GONG Taiyi, WANG Jialin, HU Nan. Research on heat transfer of gas-solid two-phase flow in CFB boilers[J]. Huadian Technology, 2021, 43(10): 61-67.

图/表 2

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循环流化床锅炉气固两相流换热研究进展

Research on heat transfer of gas-solid two-phase flow in CFB boilers

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