发电技术2026，Vol.47Issue(4)：877-885,9.DOI:10.12096/j.2096-4528.pgt.260418
循环流化床锅炉脉冲风帽的流化特性研究
Study on Fluidization Characteristics of Pulse-Type Hood in Circulating Fluidized Bed Boilers
摘要
Abstract
[Objectives]When large-scale circulating fluidized bed(CFB)boilers are involved in deep peak regulation,the fluidization quality inside the furnace deteriorates.To enhance the fluidization effect of particles in CFB boilers during peak regulation,the concept of pulse-type hood is proposed.[Methods]By adding a Helmholtz oscillation chamber to the inlet pipe of the hood,the outlet airflow exhibits pulse variations at certain frequencies,thereby forming the designed pulse-type hood.Based on a visualized test platform,cold-state tests on a single pulse-type hood are conducted.By analyzing the time-domain and frequency-domain variations of pressure at different positions of the hood,the pulse characteristics are obtained.The resistance characteristics are determined by examining the pressure drop between the inlet and outlet of the hood.The fluidization characteristics are obtained by analyzing the disturbance range and the gas-solid flow of particles around the hood.[Results]The pulse frequency predominantly concentrates within the 18 to 24 Hz range,and the pulse intensity remains notable even at loads below 40%.The pressure drop at both ends of the pulse-type hood increases with increasing load,reaching 2.2 kPa at full load.Compared with bell-type hood,at 40%,70%,and 100%loads,the pulse-type hood increases the disturbance range of particles by 8.0%,11.1%,and 15.7%,respectively,while reducing the accumulation height of large particles by 2.1%,2.5%,and 2.9%,respectively.[Conclusions]The integration of a Helmholtz oscillation chamber allows the pulse airflow to be generated at the hood outlet,enhancing gas-solid contact.This increases the disturbance to the bed particles,reduces the accumulation height of large particles,and significantly improves the fluidization quality of the particles.关键词
循环流化床(CFB)锅炉/深度调峰/脉冲风帽/阻力特性/流化特性/气固流动Key words
circulating fluidized bed(CFB)boiler/deep peak regulation/pulse-type hood/resistance characteristics/fluidization characteristics/gas-solid flow分类
能源科技引用本文复制引用
刘志村,王泉海,卢啸风,王瀛丘,阮雄伟..循环流化床锅炉脉冲风帽的流化特性研究[J].发电技术,2026,47(4):877-885,9.基金项目
国家重点研发计划项目(2022YFB4100301). Project Supported by National Key R&D Program of China(2022YFB4100301). （2022YFB4100301）
