|本期目录/Table of Contents|

[1]刘振国,于海,李晓光,等.流量和管径对地下狭长受限空间内液氮灭火效能的影响研究[J].中国安全生产科学技术,2023,19(8):66-72.[doi:10.11731/j.issn.1673-193x.2023.08.010]
　LIU Zhenguo,YU Hai,LI Xiaoguang,et al.Study on influence of flow rate and pipe diameter on fire extinguishing efficiency of liquid nitrogen in underground narrow and long confined space[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2023,19(8):66-72.[doi:10.11731/j.issn.1673-193x.2023.08.010]
点击复制

流量和管径对地下狭长受限空间内液氮灭火效能的影响研究
分享到：

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
19
期数:
2023年8期
页码:
66-72
栏目:
职业安全卫生管理与技术
出版日期:
2023-08-31

文章信息/Info

Title:
Study on influence of flow rate and pipe diameter on fire extinguishing efficiency of liquid nitrogen in underground narrow and long confined space
文章编号:
1673-193X(2023)-08-0066-07
作者:
刘振国1; 2; 于海1; 2; 李晓光1; 2; 秦志敏1; 2; 张志伟3
（1.国网新疆电力有限公司 电力科学研究院，新疆 乌鲁木齐 830011；
2.国网新疆电力有限公司 新疆输变电设备极端环境运行与检测技术实验室，新疆 乌鲁木齐 830011；
3.中国矿业大学 安全工程学院，江苏 徐州 221116)
Author(s):
LIU Zhenguo1; 2;  YU Hai1; 2;  LI Xiaoguang1; 2;  QIN Zhimin1; 2;  ZHANG Zhiwei3
(1.Electric Power Science Research Institute State Grid Xinjiang Electric Power Co.Ltd.,Urumqi Xinjiang 830011,China;
2.Xinjiang Key Laboratory of Extreme Environment Operation and Testing Technology for Power Transmission & Transformation Equipment,State Grid Xinjiang Electric Power Co.Ltd.,Urumqi Xinjiang 830011,China;
3.School of Safety Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China)
关键词:
地下狭长受限空间; 液氮灭火; 灭火效能; 流量; 管径
Keywords:
underground narrow and long confined space;  liquid nitrogen fire extinguishing;  fire extinguishing efficiency;  flow rate;  pipe diameter
分类号:
X932
DOI:
10.11731/j.issn.1673-193x.2023.08.010
文献标志码:
A
摘要:
为研究不同注氮流量和管径对地下狭长受限空间内液氮灭火效能的影响，搭建缩尺寸地下狭长受限空间液氮灭火试验平台，提出液氮的抑火、降温及窒息3个效能指标，分析评价液氮流量和管径对液氮灭火效能的影响。研究结果表明：液氮能够有效扑灭地下狭长受限空间内火灾，管径为25 mm、流量约为315 kg/h时，灭火时间约为11 s，较未注氮自熄情况下的灭火时间缩短了约95.5%；液氮流量、管径越大，整体灭火效能越强；过高的流量会减少氮气在火源处的堆积，进而削弱注氮的窒息效能；改变管径会对抑火效能和窒息效能产生较高的敏感度，而降温效能对其敏感度较低。研究结果可为地下狭长受限空间灭火中液氮灭火技术的应用提供一定参考。
Abstract:
In order to study the influence of nitrogen injection flow rate and pipe diameter on the fire extinguishing efficiency of liquid nitrogen in underground narrow and long confined space,a reduced-size liquid nitrogen fire extinguishing test system for underground narrow and long confined space was built,and the influence of flow rate and pipe diameter on the fire extinguishing efficiency of liquid nitrogen was evaluated by using three efficiency indexes including fire suppression,cooling and asphyxiation.The results show that the liquid nitrogen can effectively extinguish the fire in the underground narrow and long confined space,and when the pipe diameter is 25 mm and the flow rate is about 315 kg/h,the fire extinguishing time is 11 s,compared to the self extinguishing without nitrogen injection,the fire extinguishing time is shortened by about 95.5%.The larger the flow rate of liquid nitrogen and pipe diameter,the stronger the overall fire extinguishing efficiency.The higher flow rate will reduce the accumulation of nitrogen at the fire source,thereby weakening the asphyxiation efficiency of nitrogen injection.The fire suppression efficiency and asphyxiation efficiency are highly sensitive to the change of pipe diameter,and the sensitivity of cooling efficiency is lower.The research results can provide a reference for the application of liquid nitrogen fire extinguishing technology in the underground narrow and long confined space.

参考文献/References:

［1］LIANG K,HAO X F,AN W G,et al.Study on cable fire spread and smoke temperature distribution in T-shaped utility tunnel［J］.Case Studies in Thermal Engineering,2019,14:100433.
［2］高云升，刘连喜，廖荣华，等.干粉灭火装置在综合管廊内应用分析［J］.消防科学与技术，2018，37（12），1682-1684.GAO Yunsheng,LIU Lianxi,LIAO Ronghua,et al.Application analysis of dry powder fire extinguishing equipment used in utility tunnel［J］.Fire Science and Technology,2018,37(12):1682-1684.
［3］刘秀云，吴超，陈玉琼.细水雾灭火影响因素研究进展［J］.消防科学与技术，2010，29（4），269-272.LIU Xiuyun,WU Chao,CHEN Yuqiong.Progress in the research of factors affecting the extinguishing property of water mist［J］.Fire Science and Technology,2010,29(4):269-272.
［4］MARKE P.Cable tunnels—an integrated fire detection suppression system for rapid extinguishment［J］.Fire Technology,1991,27(3):219-233.
［5］许云骅，邹丽，倪杨，等.综合管廊自动灭火系统选型分析及全生命周期成本核算［J］.中国市政工程，2020（5）:62-65,117.XU Yunhua,ZOU Li,NI Yang,et al.Selection analysis of automatic fire extinguishing system for utility tunnel ＆ full life cycle cost accounting［J］.China Municipal Engineering,2020(5):62-65,117.
［6］胡广扬，高广伟.大型受限空间内火灾的惰气灭火［J］.消防科学与技术，1988（3）:38-39,44.HU Guangyang,GAO Guangwei.Inert gas fire extinguishing in large confined space ［J］.Fire Science and Technology,1988(3):38-39,44.
［7］LEVENDIS Y,ERGUT A,DELICHATSIOS M.Cryogenic extinguishment of liquid pool fires［J］.Process Safety Progress,2010,29(1):79-86.
［8］丁香香.采空区注入低温氮气防灭火数值模拟［D］.徐州：中国矿业大学，2014.
［9］AN D,SUNDERLAND P B,LATHROP D P.Suppression of sodium fires with liquid nitrogen［J］.Fire Safety Journal,2013,58:204-207.
［10］张洪，付萍，马克辛，等.液氮灭火装置灭火性能实验分析［J］.消防科学与技术，2003（4）:303-304.ZHANG Hong,FU Ping,MA Kexin,et al.The liquid nitrogen extinguishes fire the device and extinguishes fore thd function experiment analysis［J］.Fire Science and Technology,2003(4):303-304.
［11］杨松柳.储油罐火灾氮气灭火技术的研究［D］.沈阳：东北大学，2011.
［12］LI H X,ZHANG G W,JIA B Y,et al.Experimental investigation on extinguishing characteristics of liquid nitrogen in underground long and narrow space［J］.Tunnelling and Underground Space Technology,2021,114:104009.
［13］ZHANG G W,GUO D,ZHU G Q,et al.Influence of injection method on the fire extinguishing efficiency of liquid nitrogen in urban underground utility tunnel［J］.Case Studies in Thermal Engineering,2021,28:101427.
［14］GUO D,ZHANG G W,ZHU G Q,et al.Applicability of liquid nitrogen fire extinguishing in urban underground utility tunnel［J］.Case Studies in Thermal Engineering,2020，21:100657.
［15］蓝美娟，冯涛，涂嘉庆，等.液氮及排烟共同作用扑灭电缆火灾有效性研究［J］.消防科学与技术，2021，40（9）:1269-1275.LAN Meijuan,FENG Tao,TU Jiaqing,et al.Study on the effectiveness of extinguishing cable fires under the combined action of liquid nitrogen and smoke［J］.Fire Science and Technology,2021,40(9):1269-1275.
［16］康建宏，张欣雨，邬锦华，等.计算机数据中心液氮防灭火数值模拟［J］.消防科学与技术，2020，39（7）:904-907.KANG Jianhong,ZAHNG Xinyu,WU Jinhua,et al.Numerical simulation of liquid nitrogen fire prevention in computer data center［J］.Fire Science and Technology,2020,39(7):904-907.
［17］CHEN J A,HE Y P,WANG J.Multi-feature fusion based fast video flame detection［J］.Building and Environment,2010,45(5),1113-1122.

相似文献/References:

备注/Memo

备注/Memo:
收稿日期： 2023-01-31
作者简介： 刘振国，硕士，工程师，主要研究方向为电力安全技术及电力安全性评价。
更新日期/Last Update: 2023-09-07