双侧分支结构管道内粉尘爆炸传播规律

doi:10.12068/j.issn.1005-3026.2021.05.019

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (5): 734-740.DOI: 10.12068/j.issn.1005-3026.2021.05.019

双侧分支结构管道内粉尘爆炸传播规律

李刚，崔震，胡朋，倪磊

(东北大学资源与土木工程学院，辽宁沈阳110819)

修回日期:2020-11-10 接受日期:2020-11-10 发布日期:2021-05-20
通讯作者: 李刚
作者简介:李刚(1969-)，男，河南信阳人，东北大学教授，博士生导师．
基金资助:
基金项目；(半空) 基金项目.国家自然科学基金资助项目(51774068，51874070); 国家重点研发计划项目(2017YFC0804703); 中央高校基本科研业务费专项资金资助项目(N180701011)．

Propagation Law of Dust Explosion in Double-Sided Branch Structure Pipes

LI Gang， CUI Zhen， HU Peng， NI Lei

School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China.

Revised:2020-11-10 Accepted:2020-11-10 Published:2021-05-20
Contact: LI Gang
About author:-
Supported by:
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摘要/Abstract

摘要： 为探究粉尘爆炸在工业除尘管网中的传播规律，基于1m³粉尘爆炸测试系统和自主设计的双侧分支结构管道，对双侧分支结构管道内玉米淀粉爆炸火焰传播速度和超压峰值的变化规律展开研究.实验结果表明:三种粉尘质量浓度下，火焰在主管道内的传播速度随传播距离增加均呈持续上升趋势，双侧分支结构对火焰传播具有弱化作用，且距离点火端越近，弱化作用越显著;双侧分支结构的安装位置会影响管道内超压峰值，其在距离点火端较近时呈持续衰减趋势，距离点火端较远时呈先快速下降后上升再缓慢衰减趋势.以上研究为除尘系统的防爆设计提供参考和依据.

关键词: 双侧分支结构管道;粉尘爆炸;火焰传播速度;爆炸超压峰值;玉米淀粉

Abstract: To investigate the propagation law of dust explosion in pipe network of industrial dust removal system， the experiments based on standard 1m³ dust explosion test system and self-designed double-sided branch structure pipes were conducted. The flame propagation velocity and overpressure of cornstarch explosion in pipes with double-sided branch structure were studied. The results show that the flame front propagation velocity in primary pipe shows a continuous acceleration trend with the increase of the propagation distance under three dust concentration conditions. The double-sided branch structure has a weakening effect on the flame propagation， and the decreased distance to the ignition end leads to an enhanced weakening effect.The installation positions of the branch structure will affect the overpressure in the pipe. The decreased distance to the ignition end leads to a continuous attenuation trend， while the far distance from the ignition end shows a trend of rapid decline followed by a rising and then decays slowly. The studies provide reference and practical value for the explosion prevention design of the dust removal system.

Key words: double-sided branch structure pipes; dust explosion; flame propagation velocity; explosion overpressure; cornstarch

中图分类号:

X932

李刚，崔震，胡朋，倪磊. 双侧分支结构管道内粉尘爆炸传播规律[J]. 东北大学学报（自然科学版）, 2021, 42(5): 734-740.

LI Gang， CUI Zhen， HU Peng， NI Lei. Propagation Law of Dust Explosion in Double-Sided Branch Structure Pipes[J]. Journal of Northeastern University(Natural Science), 2021, 42(5): 734-740.

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双侧分支结构管道内粉尘爆炸传播规律

Propagation Law of Dust Explosion in Double-Sided Branch Structure Pipes

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