超超临界循环流化床锅炉主燃料跳闸及锅炉跳闸动态特性仿真

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中图分类号：TK227.7 文献标志码：A 文章编号：1000-582X（2025）07-094-10

Dynamic simulation of a ultra-supercritical circulating fluidized bed boiler during main fuel trip and boiler trip

LI Guo¹³，TAO Xiangyu²， ZHANG Zonglong²， YANG Chen²，DENG Qigang 1，3 ，NIE Li1，3 HE Wei³，LI Weichen'³，LU Jiayi'³，GONG Liming13 Clean Combustion and Flue Gas Purification Key Laboratory of Sichuan Province，Chengdu 611731， ： R.China; 2.School of Energy and Power Engineering，Chongqing University，Chongqing 40044，P.R. China; 3. Dongfang Electric Corporation， Dongfang Boiler Group Co.，Ltd.， Zigong， Sichuan 6430o1，P.R. China）

Abstract：To investigate the dynamic characteristics ofan ultra-supercritical circulating fluidized bed （CFB）boiler during main fuel trip （MFT） and boiler trip （BT） events， a mathematical model of a 660MW ultra-supercritical CFB boiler was established using the Apros simulation platform.The model dynamically simulates MFT and BT scenarios under coal conbustion conditions at 100% BMCR （boiler maximum continuous rating）， 75% THA （turbine heat acceptance） and 50% THA operating loads. Numerical results show that under 50% THA operating conditions，the steam-water separator rapidly transitions from dry to wet operation folowing MFT and BT activationand gradually returns to dry operation after system reset.These frequent dry-wet transitions increase thermal stress on the steam-water separator， potentially reducing its service life and compromising equipment safety.Therefore，triggering MFT and BT under low-load conditions should be avoided to ensure system reliability.

Keywords： ultra-supercritical; circulating fluidized bed boiler; main fuel trip; boiler trip; dynamic simulation

循环流化床燃烧技术得益于良好的燃料适应性和环保性能，在国内得到了快速发展，容量更大、参数更高、环保性能更好是循环流化床锅炉的主要发展方向[]。（剩余9424字）