热力发电2024，Vol.53Issue(1)：53-63,11.DOI:10.19666/j.rlfd.202307108
旋风炉空气动力学和烟气再循环数值模拟
Numerical investigations on the aerodynamics and flue gas recirculation optimization of cyclone-fired coal boiler
秦世泰 1杜俊硕 2李驰 2周永清3
作者信息
- 1. 国家能源蓬莱发电有限公司,山东 烟台 265600
- 2. 烟台龙源电力技术股份有限公司,山东 烟台 264006
- 3. 天津大学机械工程学院,天津 300350
- 折叠
摘要
Abstract
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 temnerature zones and the resulting severe fouling problems were effectively mitigated.关键词
旋风炉/灰渣层/计算流体动力学/烟气再循环/结渣Key words
cyclone boiler/slag layer/CFD/flue gas recirculation/slagging引用本文复制引用
秦世泰,杜俊硕,李驰,周永清..旋风炉空气动力学和烟气再循环数值模拟[J].热力发电,2024,53(1):53-63,11.
