Research Progress on the Dynamic Characteristics of Circulating Fluidized Bed Boilers While Processing Rapid Variable Loads

Huanzhou Wei, Shahong Zhu (), Yulin Mao, Junjie Gao, Zifan Shen, Jiaxing Li and Hairui Yang ()
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Huanzhou Wei: College of Energy Environment and Safety Engineering, China Jiliang University, Hangzhou 310018, China
Shahong Zhu: College of Energy Environment and Safety Engineering, China Jiliang University, Hangzhou 310018, China
Yulin Mao: College of Energy Environment and Safety Engineering, China Jiliang University, Hangzhou 310018, China
Junjie Gao: College of Energy Environment and Safety Engineering, China Jiliang University, Hangzhou 310018, China
Zifan Shen: College of Energy Environment and Safety Engineering, China Jiliang University, Hangzhou 310018, China
Jiaxing Li: College of Energy Environment and Safety Engineering, China Jiliang University, Hangzhou 310018, China
Hairui Yang: State Key Laboratory of Power Systems, Department of Energy and Power Engineering, Tsinghua University, Beijing 100124, China

Energies, 2024, vol. 17, issue 14, 1-26

Abstract: In order to achieve the “dual-carbon” goal, China’s energy sector is rapidly evolving towards a green and low-carbon future, with the integration of large-scale new energy into the power grid. However, due to the fluctuating characteristics of new energy generation, the difficulty of grid peaking has gradually increased. Consequently, enhancing flexibility and achieving wide and rapid peak shaving have emerged as the primary development directions for thermal power units. Circulating fluidized bed (CFB) boilers have been widely developed due to their excellent coal adaptability, large load regulation range, and low-cost pollutant removal ability. However, the flexibility of load variations in most CFB units is not high, limited by the substantial inertia of the furnace side and fluctuating pollutant emissions. This review is conducted with respect to the boiler side to analyze inertia sources and effects on the system while processing rapid variable loads, including gas–solid flow inertia, fuel combustion inertia, and heat transfer inertia. It discusses the development of numerical simulation models for CFB boilers and points out corresponding applications and limitations in simulating dynamic characteristics during load changes. Through experimental bench tests and numerical simulation, it investigates the dynamic characteristics of pivotal parameters in the variable load process. Moreover, the pivotal elements influencing the variable load performance and viable regulatory techniques are revealed, thereby furnishing theoretical guidance for enhancing the unit flexibility and peak shifting rates of China’s CFB boilers.

Keywords: circulating fluidized bed; rapid variable load; dynamic characteristics; flow inertia; combustion inertia; heat transfer inertia; numerical simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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