热力发电2025，Vol.54Issue(7)：54-62,9.DOI:10.19666/j.rlfd.202410262
700MW高效超超临界CFB锅炉中部全隔墙振动安全性评估
Vibration safety assessment for central full partition wall in a 700 MW high-efficiency ultra-supercritical CFB boiler
摘要
Abstract
In order to evaluate the vibration safety of the central full partition wall of the world's first lignite-fired 700 MW high-efficiency ultra-supercritical CFB boiler,a three-dimensional non-constant hydrodynamic model of the boiler is constructed,and the distribution of the gas-solid flow field within the furnace chamber is simulated.Furthermore,the pressure distribution and its fluctuation law of the gas-solid flow acting on the surface of the central full diaphragm wall within the furnace are solved.The vibration signals of the furnace wall of a supercritical 350 MW CFB boiler with a similar furnace structure are measured and analyzed spectrally to assess the frequency of pressure fluctuations in the furnace.The dynamic stress on the central diaphragm wall under fluctuating pressure in the furnace is calculated using the pressure fluctuations in the furnace obtained from simulation calculations and experimental tests as the excitation.The results demonstrate that the dynamic stress level of the central full diaphragm wall is below the permissible stress of the material,indicating that the central full diaphragm wall is safe.关键词
超超临界/CFB锅炉/全隔墙/振动安全Key words
ultra-supercritical/CFB boiler/full partition wall/vibration safety引用本文复制引用
吕卓,鲁佳易,邓启刚,周旭,邱彬彬,董晨昊,蹇开林,程乐鸣..700MW高效超超临界CFB锅炉中部全隔墙振动安全性评估[J].热力发电,2025,54(7):54-62,9.基金项目
云南省科技计划项目(202403AA080020) Science and Technology Program of Yunnan Province(202403AA080020) （202403AA080020）
