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Numerical investigations on the aerodynamics and flue gas recirculation optimization of cyclone-fired coal boiler
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Shitai QIN1, Junshuo DU2, Chi LI2, Yongqing ZHOU3
Thermal Power Generation | 2024, 53(1) : 53 - 63
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Thermal Power Generation | 2024, 53(1): 53-63
• High proportion combustion technology for high-alkali coal •
Numerical investigations on the aerodynamics and flue gas recirculation optimization of cyclone-fired coal boiler
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Shitai QIN1, Junshuo DU2, Chi LI2, Yongqing ZHOU3
Affiliations
  • 1.CHN Energy Shandong Penglai Power Generation Co., Ltd., Yantai 265600, China
  • 2.Yantai Longyuan Power Technology Co., Ltd., Yantai 264006, China
  • 3.School of Mechanical Engineering, Tianjin University, Tianjin 300350, China
Published: 2024-01-25 doi: 10.19666/j.rlfd.202307108
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As a kind of slag-tap boiler, cyclone-fired boilers exhibit significantly different aerodynamics comparing with pulverized coal (PC) boilers. However, by far there are still lack of CFD models that are able to provide effective guidance to the design and operation of cyclone-fired boilers. A CFD model of cyclone-fired boilers was developed in which the capture of coal particles by the molten slag layer was considered through a slag layer coal particle capture model. This model was then employed to investigate the aerodynamics and flue gas recirculation (FGR) optimization design of a 550 MW cyclone-fired boiler. The results demonstrate the highly nonuniform characteristics of furnace aerodynamics of cyclone-fired boilers due to the strong swirling flows created by the cyclones leads to the formation of localized high temperature zones and severe boiler fouling problems at the entrance of boiler convection pass. Thus, it is critical to adapt the FGR design with the nonuniform furnace flow and temperature distributions. The simulation results show that, with the optimized FGR design, the high temperature zones and the resulting severe fouling problems were effectively mitigated.

cyclone boiler  /  slag layer  /  CFD  /  flue gas recirculation  /  slagging
Shitai QIN, Junshuo DU, Chi LI, Yongqing ZHOU. Numerical investigations on the aerodynamics and flue gas recirculation optimization of cyclone-fired coal boiler[J]. Thermal Power Generation, 2024 , 53 (1) : 53 -63 . DOI: 10.19666/j.rlfd.202307108
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Article Info
doi: 10.19666/j.rlfd.202307108
  • Receive Date：2023-07-01
  • Online Date：2025-12-25
  • Published：2024-01-25
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  • Received：2023-07-01
Affiliations
    1.CHN Energy Shandong Penglai Power Generation Co., Ltd., Yantai 265600, China
    2.Yantai Longyuan Power Technology Co., Ltd., Yantai 264006, China
    3.School of Mechanical Engineering, Tianjin University, Tianjin 300350, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202307108
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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Genus		 种数
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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