当前位置: X-MOL 学术Combust. Sci. Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Spurting NH4H2PO4 Powder to Prevent the Propagation of Gas Explosion along the Duct
Combustion Science and Technology ( IF 1.7 ) Pub Date : 2020-04-16 , DOI: 10.1080/00102202.2020.1748607
Chang Lu 1, 2 , Yunpeng Zhang 1 , Han Zhu 1 , Qi Meng 1 , Rongkun Pan 1 , Minggao Yu 3
Affiliation  

ABSTRACT

An active system was designed to detect the flame automatically and spurting out the extinguishing agent to prevent the propagation of flame after gas explosion. The effects of both nitrogen and ABC powder (NH4H2PO4) on explosion prevention were examined. The extinguishant was continually spurted into the duct through the nozzles. At the same time, it was blown downstream by the blast wave. The suppression zone was formed both near and downstream of the nozzles, where distributed the nitrogen and ABC powder with high concentration. By increasing the amount of ABC powder and nitrogen pressure, the flame was quenched and the propagation of explosion was prevented in this region. The influences of upward venting and different nozzle positions were also studied. It is more conducive to explosion prevention with the condition of upward venting than that of without upward venting. The critical amount of ABC powder needed to prevent the flame was proportional to the flame speed at the position of the nozzle. Less ABC powder was required to successfully prevent the explosion when the nozzles were set to the position where the flame speed was lower.



中文翻译:

喷射 NH4H2PO4 粉末以防止气体爆炸沿管道传播

摘要

设计了主动系统,自动检测火焰并喷出灭火剂,防止气体爆炸后火焰蔓延。氮气和 ABC 粉末 (NH 4 H 2 PO 4) 对防爆进行了检查。灭火剂通过喷嘴不断喷入管道。与此同时,它被冲击波吹向下游。喷嘴附近和下游都形成了抑制区,其中分布着高浓度的氮气和ABC粉末。通过增加 ABC 粉末的量和氮气压力,火焰被淬灭并阻止了该区域的爆炸传播。还研究了向上排气和不同喷嘴位置的影响。有向上排气的条件比不向上排气更有利于防爆。防止火焰所需的 ABC 粉末临界量与喷嘴位置处的火焰速度成正比。

更新日期:2020-04-16
down
wechat
bug