Journal Home Online First Current Issue Archive For Authors Journal Information 中文版

Strategic Study of CAE >> 2021, Volume 23, Issue 3 doi: 10.15302/J-SSCAE-2021.03.009

Prospects for the Low Pollutant Emission Control of Circulating Fluidized Bed Combustion Technology

1. Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China;

2. Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China
 

Funding project:中国工程院咨询项目“循环流化床燃烧技术的发展前景” (2020-XY-10) Received: 2021-01-11 Revised: 2021-03-21 Available online: 2021-06-01

Next Previous

Abstract

 With the pollutant emission standards becoming increasingly stringent and considering the pressure of carbon neutral by 2060, the low pollutant emission potential of circulating fluidized bed (CFB) combustion technology needs to be further exploited, thus to promote the market competitiveness of CFB boilers; this is critical for the clean and efficient utilization of coal as well as for the energy transformation in China. In this article, we summarize the pollutant emission characteristics of CFB combustion, and review the development of major technologies for CFB boiler emission control. Based on the energy development strategies and corresponding policies in China, development suggestions are proposed for reducing pollutant emission of the CFB combustion technology. The most significant approach is to push the limits of original pollutant emission for CFB combustion by re-specifying the fluidization state and through in-furnace combustion adjustment, while the boiler thermal efficiency should be ensured. For the long-term development of coal energy, the new-generation CFB combustion technology with ultra-low emission should be researched and developed while combining with technologies such as  supercritical/ultra-supercritical, intelligent operation, carbon capture/utilization/storage, and energy storage technologies. The existing CFB boilers with small or medium capacity should also be upgraded. Considering the fuel flexibility of CFB combustion, biomass power generation should be promoted to realize low-cost and high-efficiency consumption of low-heat value fuels, urban refuse, industrial wastes, etc. The peak load regulation capacity and low pollutant emission property of the CFB boilers should be promoted to improve operation flexibility and renewable energy consumption. Moreover, the desulphurization ash produced in CFB combustion should be comprehensively utilized, and the N2O emission problem is also significant. The pollutant emission standards and related policies need to be formulated from an overall perspective to guide the healthy development of the energy industry.

Figures

图 1

图 2

References

[ 1 ] 国家统计局. 中国统计年鉴—2020 [M]. 北京: 中国统计出版社, 2020. National Bureau of Statistics of China. China statistical yearbook–2020 [M]. Beijing: China Statistics Press, 2020.

[ 2 ] BP Group. BP statistical review of world energy 2020 [R]. London: BP Group, 2020.

[ 3 ] 孙旭东, 张博, 彭苏萍. 我国洁净煤技术2035发展趋势与战略对 策研究 [J]. 中国工程科学, 2020, 22(3): 132–140. Sun X D, Zhang B, Peng S P. Development trend and strategic countermeasures of clean coal technology in China toward 2035 [J]. Strategic Study of CAE, 2020, 22(3): 132–140. link1

[ 4 ] Lyu J F, Yang H R, Ling W, et al. Development of a supercritical and an ultra-supercritical circulating fluidized bed boiler [J]. Frontiers in Energy, 2017, 13(1): 114–119. link1

[ 5 ] Huang Z, Deng L, Che D F. Development and technical progress in large-scale circulating fluidized bed boiler in China [J]. Frontiers in Energy, 2020, 14(4): 699–714.

[ 6 ] Leckner B. Fluidized bed combustion: Mixing and pollutant limitation [J]. Progress in Energy and Combustion Science, 1998, 24(1): 31–61. link1

[ 7 ] Johnsson J E. Formation and reduction of nitrogen oxides in fluidized-bed combustion [J]. Fuel, 1994, 73(9): 1398–1415. link1

[ 8 ] 柯希玮, 蔡润夏, 吕俊复, 等. 钙基脱硫剂对循环流化床NOx排放 影响研究进展 [J]. 洁净煤技术, 2019, 25(1): 1–11. Ke X W, Cai R X, Lyu J F, et al. Research progress of the effects of Ca-based sorbents on the NOx reaction in circulating fluidized bed boilers [J]. Clean Coal Technology, 2019, 25(1): 1–11. link1

[ 9 ] 周浩生, 陆继东, 周琥. 燃煤流化床加入氧化钙的氮转化机理 [J]. 工程热物理学报, 2000, 21(5): 647–651. Zhou H S, Lu J D, Zhou H. Nitrogen conversion in fluidized bed combustion of coal with limestone addition [J]. Journal of Engineering Thermophysics, 2000, 21(5): 647–651. link1

[10] Ke X W, Li D F, Li Y R, et al. 1-dimensional modelling of in-situ desulphurization performance of a 550 MWe ultra-supercritical CFB boiler [J]. Fuel, 2021, 290(1): 1–12. link1

[11] Ke X W, Cai R X, Zhang M, et al. Application of ultra-low NOx emission control for CFB boilers based on theoretical analysis and industrial practices [J]. Fuel Processing Technology, 2018, 181(1): 252–258. link1

[12] Cai R, Ke X W, Huang Y, et al. Applications of ultrafine limestone sorbents for the desulfurization process in CFB boilers [J]. Environental Science and Technology, 2019, 53(22): 13514– 13523. link1

[13] 张缦, 张素花, 郭学茂, 等. 流态对CFB燃烧气体污染物排放的 影响及其应用 [J]. 工业锅炉, 2020 (3): 11–17. Zhang M, Zhang S H, Guo X M, et al. The effect and application of solid-gas two-phase flow pattern on the emission in the circulating fluidized bed combustion [J]. Industrial Boilers, 2020 (3): 11–17. link1

[14] 程晓磊. 低氮燃烧及炉内脱硫技术在75 t/h循环流化床锅炉上 的应用 [J]. 工业锅炉, 2018 (5): 28–31. Cheng X L. Application of low-NOx combustion technology and desulphurization technology on 75 t/h circulating fluidized bed boiler [J]. Industrial Boilers, 2018 (5): 28–31. link1

[15] 张思海, 张双铭, 张俊杰, 等. 330 MW亚临界CFB锅炉烟气 再循环深度调峰运行性能研究 [J]. 洁净煤技术, 2021, 27(1): 291–298. Zhang S H, Zhang S M, Zhang J J, et al. Performance research on deep peak regulation with flue gas recirculation in a 330 MW CFB boiler [J]. Clean Coal Technology, 2021, 27(1): 291–298. link1

[16] 李博, 赵锦洋, 吕俊复. 燃煤烟气超低排放技术路线选择建议 [J]. 电力科技与环保, 2016, 32(5): 13–15. Li B, Zhao J Y, Lyu J F. Suggestions on the ultra-low emission technical routes of coal-fired flue gas [J]. Electric Power Technology and Environmental Protection, 2016, 32(5): 13–15. link1

[17] 杜玉颖, 孙永斌, 詹扬, 等. 燃煤电站超低排放控制技术设计方 法与图谱 [J]. 环境工程, 2018, 36(3): 92–97. Du Y Y, Sun Y B, Zhan Y, et al. Design method and map of ultralow emission control technology for coal-fired power plants [J]. Environmental Engineering, 2018, 36(3): 92–97. link1

[18] Shimizu T, Satoh M, Fujikawa T, et al. Simultaneous reduction of SO2, NOx and N2O emissions from a two-stage bubbling fluidized bed combustor [J]. Energy Fuels, 2000, 14(4): 862–868. link1

[19] Zhang Y, Zhu J G, Lyu Q G, et al. The ultra-low NOx emission characteristics of pulverized coal combustion after high temperature preheating [J]. Fuel, 2020, 277(1): 1–12. link1

[20] 中华人民共和国国家质量监督检验检疫总局, 中国国家标准 化管理委员会. 用于水泥和混凝土中的粉煤灰 (GB/T 1596— 2017) [S]. 北京: 中国质量标准出版传媒有限公司, 2018. General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China, Standardization Administration. Fly ash used for cement and concrete (GB/T 1596—2017) [S]. Beijing: China Quality and Standards Publishing & Media Co., Ltd., 2018.

[21] Kramlich J C, Linak W P. Nitrous oxide behavior in the atmosphere, and in combustion and industrial systems [J]. Progress in Energy and Combustion Science, 1994, 20(2): 149–202. link1

[22] The International Renewable Energy Agency. Renewable energy statistics 2020 [R]. Abu Dhabi: The International Renewable Energy Agency, 2020.

[23] 于浩洋, 高明明, 张缦, 等. 循环流化床机组深度调峰性能分析 与评价 [J]. 热力发电, 2020, 49(5): 65–72. Yu H Y, Gao M M, Zhang M, et al. Performance analysis and evaluation of deep peak-regulating for circulating fluidized bed units [J]. Thermal Power Generation, 2020, 49(5): 65–72. link1

[24] 蔡晋, 单露, 王志宁, 等. 超临界350 MW循环流化床锅炉变负荷 特性 [J]. 热力发电, 2020, 49(9): 98–103. Cai J, Shan L, Wang Z N, et al. Variable load characteristics of a supercritical 350 MW circulating fluidized bed boiler [J]. Thermal Power Generation, 2020, 49(9): 98–103. link1

[25] 杜佳军, 张鹏, 韩新建. 循环流化床机组环保参数异常原因分析 与对策 [J]. 洁净煤技术, 2020, 26(6): 237–242. Du J J, Zhang P, Han X J. Cause analysis and countermeasure research on environmental protection parameter abnormity of CFB unit [J]. Clean Coal Technology, 2020, 26(6): 237–242. link1

[26] 柯希玮, 张缦, 杨海瑞, 等. 循环流化床锅炉NOx生成和排放特性 研究进展 [J]. 中国电机工程学报, 2021, 41(8): 2757–2771. Ke X W, Zhang M, Yang H R, et al. Research progress on the characteristics of NOx emission in circulating fluidized bed boiler [J]. Proceedings of the CSEE, 2021, 41(8): 2757–2771. link1

[27] 李博, 王卫良, 姚宣, 等. 煤电减排对中国大气污染物排放控制 的影响研究 [J]. 中国电力, 2019, 52(1): 110–117. Li B, Wang W L, Yao X, et al. Study on the effects of emission reduction in coal-fired power industry on china’s air pollutant emission control [J]. Electric Power, 2019, 52(1): 110–117. link1

Related Research