应用于循环流化床锅炉气固流动和燃烧的CPFD数值模拟.pdfVIP

第 33 卷 第 23 期 中 国 电 机 工 程 学 报 Vol.33 No.23 Aug.15, 2013 2013 年 8 月 15 日 Proceedings of the CSEE ©2013 Chin.Soc.for Elec.Eng. 75 文章编号：0258-8013 (2013) 23-0075-09 中图分类号：TK 224 文献标志码：A 学科分类号：470·20 应用于循环流化床锅炉气固流动和燃烧的 CPFD 数值模拟 张瑞卿，杨海瑞，吕俊复 (清华大学热科学与动力工程教育部重点实验室，北京市 海淀区 100084) Application of CPFD Approach on Gas-solid Flow and Combustion in Industrial CFB Boilers ZHANG Ruiqing, YANG Hairui, LÜ Junfu (Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Haidian District, Beijing 100084, China) ABSTRACT: This paper performed a systematic simulation 0 引言 research on gas-solid flow and coal combustion in an industrial 循环流化床(circulating fluidized bed，CFB)锅炉 circulating fluidized bed (CFB) boiler using a commercial CPFD package BarracudaTM. Then, dynamic process including 技术作为清洁煤燃烧技术的核心方向之一，近年来 qualitative fluidization patterns and quantitative data in the 受到持续的关注。相比煤粉炉，循环流化床锅炉在 furnace from start-up to stabilization was obtained. General and 燃料适应性和环保性能方面具有显著的优势。而从 some unique characteristics of CFB gas-solid flow was well 运行特点方面，循环流化床内部物料浓度较高，剧 captured while detailed wear-intensive location in furnace was 烈的气固流动和热交换对维持循环流化床的低床 identified. The calculation results prove that application of a simplified combustion mechanism is efficient, and furnace 温运行至关重要。已有大量学者利用冷态或者热态 temperature profile and gas concentration distribution are 实验台对循环流化床中的气固流动特性进行了详 consistent with actual measurement data. This research presents 细的研究[1-2]，同时一些在