流体机械2025，Vol.53Issue(10)：19-26,8.DOI:10.3969/j.issn.1005-0329.2025.10.003
循环流化床立管-阀门系统压力脉动特性的试验研究
Experimental study of pressure pulsation characteristics of standpipe-valve system in a circulating fluidized bed
摘要
Abstract
To address the issue of uncertain pressure pulsation characteristics during the cyclic downward movement of particles in a standpipe-valve system and the lack of quantitative characterization,an experimental study on pressure pulsation characteristics was conducted.By varying the particle mass flow rate,the dynamic pressure of the gas-solid two-phase flow before and after the valve(at measuring points P1 and P2)was measured.Through analytical methods including dynamic pressure,static pressure,standard deviation,and power spectral density,the pressure fluctuation characteristics within the standpipe-valve system were thoroughly investigated.The results indicate that as the particle mass flow rate Gs increases from 0 to 117.72 kg/(m²⋅s),significant low-frequency,high-amplitude pressure fluctuations occur in the system,primarily due to particle clustering,gas-solid interactions,and bubble disturbances.The standard deviation of the dynamic pressure at point P2 shows a linear relationship with the particle mass flow rate,suggesting that the standard deviation can be used for real-time monitoring of the particle mass flow rate in circulating fluidized beds.When the particle mass flow rate Gs=0,both points P1 and P2 on the standpipe exhibit a single dominant frequency with relatively low power spectral density.As the particle mass flow rate increases to 6.28 kg/(m²⋅s),both P1 and P2 display dual-frequency characteristics,comprising a primary frequency and a secondary frequency.The power spectral density at P1 initially increases and then decreases with increasing particle mass flow rate,while at P2,it increases with increasing particle mass flow rate.The pressure pulsations within the standpipe are all low-frequency(<0.41 Hz)and act as the excitation force causing standpipe vibration.This study provides a theoretical basis and experimental support for the optimal design and safe operation of particle circulation systems in circulating fluidized beds.关键词
循环流化床/立管-阀门系统/动态压力/标准偏差/功率谱密度Key words
circulating fluidized bed/standpipe-valve system/dynamic pressure/standard deviation/power spectral density分类
能源科技引用本文复制引用
巴英达拉,贺娇,陈晓玲,刘梦溪,魏耀东,张玉明..循环流化床立管-阀门系统压力脉动特性的试验研究[J].流体机械,2025,53(10):19-26,8.基金项目
国家自然科学基金面上项目(22278432) （22278432）
国家重点研发计划项目(2021YFA1501304) （2021YFA1501304）
中国石油大学(北京)科研基金项目(2462024XKQY001) （北京）
中国石油大学(北京)科学基金项目(2462022QZDX003) （北京）
中国石油大学(北京)克拉玛依校区教育教学研究与改革项目(JG2024036) （北京）
