东南大学学报（自然科学版）2012，Vol.42Issue(2)：308-312,5.DOI:10.3969/j.issn.1001-0505.2012.02.022
加压循环流化床气固流动特性实验研究Ⅰ:颗粒体积分数分布特性
Experimental research of gas-solid flow behaviors in pressurized circulating fluidized bed-Ⅰ :solid holdup distribution
摘要
Abstract
According to the development requirement of pressurized coal gasification and chemical looping combustion, a cold-model experimental facility of a pressurized circulating fluidized bed is built. The pressure drop and the solid holdup distribution of Geldart group B particles with the mean diameter of 137 μm and the density of 2 490 kg/m3 are investigated under different operating pressure (0. 1 to 0. 5 Mpa). The experimental results show that the total pressure drop across the riser increases linearly with the increase of the solid-to-air mass flow ratio. The increasing slope increases gradually with the increase of the operating pressure and is hardly affected by the superficial gas velocity and the solid mass flux. At the elevated pressure, the apparent solid holdup is lower at the upper part and higher at the bottom part of the riser. It increases with the increase of the solid mass flux and decreases with the increase of the standard state superficial gas velocity. When the solid mass flux and the standard state superficial gas velocity are certain, with the increase of the operating pressure , the apparent solid holdup in the riser increases and the corresponding axial distribution becomes more uniform.关键词
气固两相流/循环流化床/加压/流动特性/颗粒体积分数Key words
gas-solid two-phase flow/ circulating fluidized bed/ pressurized/ flow characteristics/solid holdup分类
能源科技引用本文复制引用
殷上轶,金保昇,钟文琪,陆勇,邵应娟,刘浩..加压循环流化床气固流动特性实验研究Ⅰ:颗粒体积分数分布特性[J].东南大学学报（自然科学版）,2012,42(2):308-312,5.基金项目
国家自然科学基金资助项目(51076029)、国际科技合作资助项目(2010DFA61960). （51076029）
