Hybrid C2H2/dust/air explosion characteristics of CaC2 in the presence of water drops
Hybrid C2H2/dust/air explosion characteristics of CaC2 in the presence of water drops
复制标题
水滴存在下 CaC2 的混合 C2H2/粉尘/空气爆炸特性
DOI：
10.1016/j.powtec.2019.09.085
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发表时间：
2020
影响因子：
5.2
通讯作者：
Sun Shuai-Qi
中科院分区：
文献类型：
--
作者：
Song Shi-Xiang;Cheng Yang-Fan;Meng Xiang-Rui;Ma Hong-Hao;Wang Wen-Tao;Wang Wen-Yuan;Sun Shuai-Qi
在20 L球形容器中研究了悬浮电石粉尘的爆炸特性及其影响因素。乙炔（C2 H2）和氢氧化钙（Ca（OH）2）是CaC 2和水的反应产物。因此，实验中使用C2 H2/Ca（OH）2混合物作为参比样品。实验结果表明，环境中的含水量（空气相对湿度和外界水滴）对CaC 2粉尘爆炸有显著影响。CaC 2粉尘的爆炸性随空气相对湿度的增加而增强。随着混合CaC 2/干水浓度的增加，CaC 2/干水爆炸的Pex值先上升后稳定在0.74 MPa，（dP/dt）ex在达到最大值238.25 MPa s− 1后呈先上升后下降的趋势。2随着C2 H2含量的增加，混合气的爆发力先增大后减小，3种样品的Pexand（dP/dt）ex依次增大：混合气CaC 2/干水<混合气C2 H2/Ca（OH）2<纯C2 H2。干燥CaC 2粉尘不发生爆炸，但随着环境含水量的增加，其爆炸性显著增强，主要原因是C2 H2的存在。
The explosion characteristics and influential factors of suspended calcium carbide (CaC2) dust were studied using a 20-L spherical vessel. Acetylene (C2H2) and calcium hydroxide (Ca(OH)2) are the reaction products of CaC2and water. Therefore, C2H2/Ca(OH)2mixture was used as the reference sample in the experiment. Experimental results showed that the water content in the environment (air relative humidity and external water drops) had significant impacts on CaC2dust explosion. The explosibility of CaC2dust enhanced with the increasing air relative humidity In the experiments, CaC2dust and dry water were equally proportioned when the value of stoichiometric ratioRwas 1. When the concentration of hybrid CaC2/dry water increased, the value ofPexof CaC2/dry water explosion rose first and then stabilized at 0.74 MPa, and the value of (dP/dt)exshowed a trend of rising first and then declining after reaching the maximum value of 238.25 MPa s−1.Pexand (dP/dt)exof pure C2H2explosion and C2H2/Ca(OH)2hybrid explosion increased at the early stage and then decreased for the increasing C2H2content.Pexand (dP/dt)exof the three samples increased in the following order: hybrid CaC2/dry water < hybrid C2H2/Ca(OH)2< pure C2H2. Dry CaC2dust did not explode, but its explosibility was significantly enhanced for the increasing water content in the environment, and the main reason was the existence of C2H2.