主管:中华人民共和国应急管理部
主办:应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU

Fire Science and Technology ›› 2022, Vol. 41 ›› Issue (7): 954-958.

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Experimental study on carbon dioxide gas fire extinguishing technology in large buried cable tunnel

LI Kun-sheng, XIONG Gang, HUANG Zhao-yun, FU Qiang-lin   

  1. (State Grid Chongqing Electric Power Company Maintenance Branch,Chongqing 400039, China)
  • Online:2022-07-15 Published:2022-07-15

Abstract: Abstract: In order to study the feasibility and effect of carbon dioxide fire extinguishing in large-buried cable tunnel, this paper conducts experimental study on a 220 kV large-buried cable tunnel. Three working conditions and five fire sources were set up in the experiment. The fire extinguishing time at different working conditions and fire source points, the change of carbon dioxide and oxygen concentration during extinguishing, the change of ambient temperature and humidity, the pressure attenuation of pipeline network system, and the freezing of pipelines were compared. Research shows that carbon dioxide gas can quickly extinguish cable tunnel fire, and fixed pipeline network system is especially suitable for large buried cable tunnels.

Key words: Key words: large buried depth, cable tunnel, fire, carbon dioxide gas, fire extinguishing, fixed pipeline network system