电力科技与环保2025，Vol.41Issue(2)：183-193,11.DOI:10.19944/j.eptep.1674-8069.2025.02.002
循环流化床锅炉炉内脱硫技术研究进展
Research progress of desulfurization technology in circulating fluidized bed boiler
摘要
Abstract
[Objective]Circulating fluidized bed(CFB)boilers can achieve desulfurization during combustion by adding calcium-based desulfurizer to the furnace,and the original emission concentration of SO2 at the furnace outlet is low.However,in the face of increasingly stringent emission standards for air pollutants in thermal power plants,how to optimize the furnace desulfurization process and consolidate the advantages of low-cost pollutant emission control of CFB boilers is a very concerned issue in engineering.It is necessary to carry out a more in-depth understanding of the SO2 generation and furnace desulfurization characteristics of CFB boilers.[Methods]This paper summarizes the influence of various design or operation parameters on the desulfurization efficiency in the furnace by combing the relevant research on the desulfurization in the furnace of CFB boiler in recent years,and puts forward the corresponding control measures for the desulfurization in the furnace.[Results]The research shows that under the given desulfurizer and boiler load,improving the efficiency of the separator and the performance of the material circulation system,using ultra-fine limestone matching with the high-efficiency separator,reasonably designing and regulating the furnace temperature(800～850℃)and oxygen content,determining the appropriate limestone feeding position,and appropriately increasing the calcium-sulfur ratio but not higher than 3.3,can effectively improve the desulfurization efficiency in the furnace.Even under specific working conditions,it can directly meet the SO2 ultra-low emission standards without relying on the tail flue gas desulfurization system.However,in-furnace desulfurization usually leads to an increase in NOx emissions.When the calcium-sulfur ratio exceeds 2,the increase in boiler heat loss reduces the boiler efficiency.In addition,the increase in CaO and desulfurization products in fly ash also has a certain impact on the tail dust removal performance.[Conclusion]It is necessary to optimize the desulfurization performance of CFB boiler,and pay attention to the overall operation economy of the boiler..关键词
循环流化床/SO2/炉内脱硫/影响因素Key words
circulating fluidized bed/SO2/in-situ desulphurization/influencing factors分类
能源与动力引用本文复制引用
韩铠泽,刘方,张光学..循环流化床锅炉炉内脱硫技术研究进展[J].电力科技与环保,2025,41(2):183-193,11.基金项目
国家自然科学基金项目(52306029) （52306029）
