负压差立管插板阀调节颗粒质量流率的实验分析

doi:10.3969/j.issn.0438-1157.2012.11.004

化工学报 ›› 2012, Vol. 63 ›› Issue (11): 3402-3406.DOI: 10.3969/j.issn.0438-1157.2012.11.004

负压差立管插板阀调节颗粒质量流率的实验分析

陈勇, 汪贵磊, 徐俊, 严超宇, 陈建义, 魏耀东

中国石油大学(北京)重质油国家重点实验室, 北京 102249

收稿日期:2012-04-11 修回日期:2012-06-07 出版日期:2012-11-05 发布日期:2012-11-05
通讯作者: 魏耀东
作者简介:陈勇(1984-),男,博士研究生。
基金资助:
国家自然科学基金项目(20876170,21176250)。

Solids circulating rate regulation by plate valve installed in standpipe under negative pressure gradient

CHEN Yong, WANG Guilei, XU Jun, YAN Chaoyu, CHEN Jianyi, WEI Yaodong

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China

Received:2012-04-11 Revised:2012-06-07 Online:2012-11-05 Published:2012-11-05
Supported by:
supported by the National Natural Science Foundation of China(20876170,21176250).

摘要/Abstract

摘要： 在大型循环流化床装置上,通过改变负压差立管上的插板阀的开度,测定不同颗粒质量流率条件下插板阀上下的流态和脉动压力,以此分析插板阀对下料过程颗粒质量流率的调控机制。实验结果表明,对于立管的下料过程插板阀的开度存在一个临界开度,将插板阀的开度范围划分为非可控制区和可控制区。当插板阀的开度大于临界开度时,处于非可控制区,不能进行颗粒质量流率的调节,此时插板阀上下的流态一致,脉动压力曲线相似;当插板阀的开度小于临界开度时,处于可控制区,可以进行颗粒质量流率的调节,此时插板阀上的流态是移动床,阀下的流态是雨状下落流,上下的脉动压力曲线不同。

关键词: 循环流化床, 负压差立管, 插板阀, 颗粒质量流率, 调节

Abstract: In a large scale circulating fluidized bed(CFB)device,an experimental study was conducted on the relationship between solids circulating rate and opening rate of plate valve installed in the standpipe under negative pressure gradient.The fluidized patterns and pressure fluctuations above and below the plate valve were measured for analyzing the plate valve operation process.Experimental results showed that there was a critical opening rate of plate valve,which divided the opening of the plate valve into uncontrolled range and controlled range for solids circulating rate regulation.When opening rate was greater than the critical value,the plate valve had no action on solids circulating rate regulation.The fluidized patterns above and below the plate valve were the same,and the pressure fluctuation profiles were similar.When open rate was smaller than the critical value,the plate valve had the function of solids circulating rate regulation.The fluidized pattern above the plate valve was moving bed,and the fluidized pattern was like raining flow below the plate valve.The pressure fluctuation profile above the plate valve was different from that below the plate valve.

Key words: CFB, standpipe under negative pressure gradient, plate valve, solids circulating rate, regulation

中图分类号:

TB61

陈勇, 汪贵磊, 徐俊, 严超宇, 陈建义, 魏耀东. 负压差立管插板阀调节颗粒质量流率的实验分析[J]. 化工学报, 2012, 63(11): 3402-3406.

CHEN Yong, WANG Guilei, XU Jun, YAN Chaoyu, CHEN Jianyi, WEI Yaodong. Solids circulating rate regulation by plate valve installed in standpipe under negative pressure gradient[J]. CIESC Journal, 2012, 63(11): 3402-3406.

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负压差立管插板阀调节颗粒质量流率的实验分析

Solids circulating rate regulation by plate valve installed in standpipe under negative pressure gradient

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