化工进展 ›› 2021, Vol. 40 ›› Issue (3): 1643-1652.DOI: 10.16085/j.issn.1000-6613.2020-0868

• 资源与环境化工 • 上一篇    下一篇

循环流化床锅炉外置换热器的研究现状及在垃圾焚烧炉中的应用

蒋旭光1(), 魏邦吉1, 胡林飞2, 王汝佩2, 宋菲菲2, 陈少卿2   

  1. 1.浙江大学能源清洁利用国家重点实验室,热能工程研究所,浙江 杭州 310027
    2.杭州锦江集团有限公司,浙江 杭州 310027
  • 收稿日期:2020-05-19 出版日期:2021-03-05 发布日期:2021-03-17
  • 通讯作者: 蒋旭光
  • 作者简介:蒋旭光(1965—),男,博士,教授,博士生导师,研究方向为废弃物能源化和资源化。E-mail:jiangxg@zju.edu.cn
  • 基金资助:
    国家重点研发计划(2018YFC1901302);国家自然科学基金创新群体(51621005);国家自然科学基金(51676172);浙江大学基本科研业务费专项资金(2018FZA4010)

Research status of external heat exchanger for circulating fluidized bed boiler and its application and development in garbage furnace

JIANG Xuguang1(), WEI Bangji1, HU Linfei2, WANG Rupei2, SONG Feifei2, CHEN Shaoqing2   

  1. 1.State Key Laboratory of Clean Energy Utilization, Institute of Thermal Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China
    2.Hangzhou Jinjiang Group Company Limited, Hangzhou 310027, Zhejiang, China
  • Received:2020-05-19 Online:2021-03-05 Published:2021-03-17
  • Contact: JIANG Xuguang

摘要:

循环流化床垃圾焚烧炉作为一种新型焚烧处理技术,具有适用范围广、燃烧稳定、排放低等优点。布置外置换热器可以在提高锅炉蒸汽的压力、温度参数及容量的同时避免过热器高温腐蚀,灵活调节床温。虽然目前国内外对外置换热器已有相关研究,但以电站燃煤锅炉为主。垃圾焚烧炉由于锅炉蒸汽的压力和温度参数较低,采用外置换热器还很少。本文综述了带外置换热器的循环流化床垃圾焚烧炉的研究现状,同时介绍了具有相同换热原理、极具参考价值的带外置床的循环流化床燃煤锅炉的国内外研究现状,分析了与床内传热系数、流化特性相关的影响因素,指出在试验和实炉运行时存在受热面出口壁温热偏差较大、边壁区域流化质量不佳的问题,并提出了改进措施。最后总结当前的研究重点,提出了针对试验台和实炉测试的改进措施,并针对垃圾流化床外置换热器的研发提出了研究思路,为今后建设高参数垃圾焚烧炉提供了合理建议。

关键词: 垃圾焚烧炉, 外置换热器, 传热系数, 流化特性, 热偏差

Abstract:

Circulating fluidized bed (CFB) incinerator is a new type of incineration technology. The benefits of circulating fluidized bed incinerator include wide application, stable combustion and low emission. High temperature corrosion of the superheater can be avoided and bed temperature can be adjusted flexibly if the boiler steam pressure, temperature parameters and capacity are increased by the arrangement of the external heat exchanger (EHE). Although related researches on external heat exchangers have been done at home and abroad at present, they are mainly focused on coal-fired boilers in power plants. The EHE is seldom used in municipal solid waste (MSW) because of the low boiler steam pressure and temperature parameters. In this paper,research status of CFB incinerator with external heat exchanger were reviewed. The current situation and technical problem of CFB coal-fired boiler with external bed at home and abroad which has same heat exchange principle and great reference value were also introduced. The influencing factors related to the heat transfer coefficient and fluidization characteristics inside EHE were analyzed, problems in experiment and EHE, such as large temperature deviation at the outlet of heating surface and poor fluidization quality in the side wall area were pointed out, the improvement measures were put forward, and the future research idea of external heat exchanger for MSW CFB incinerator was proposed. In the end, the current research emphases were summarized, and the improvement measures for the experiment and EHE test were put forward, which provides reasonable suggestions for the future manufacturing of the high-parameter waste incinerator.

Key words: waste incinerator, external heat exchanger, heat transfer coefficient, fluidization characteristics, thermal deviation

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