连通容器甲烷-空气混合物抑爆影响因素

为了研究连通器甲烷-空气混合物抑爆的影响因素,利用小球容器、管道、大球容器建立了5种结构的连通容器气体爆炸测试系统,在40目丝网结构条件下,研究了管道长度、丝网层数、传爆容器、抑爆位置等对连通容器甲烷-空气混合物爆炸强度的影响。结果表明:小球容器与管道连通时,随着丝网层数和接管长度的增加,管道末端的压力逐渐降低;当增加传爆容器时,球形容器与管道内气体爆炸强度增加;小球容器与1段管道以及大球容器连通时,丝网层数越多,抑爆效果越明显;小球容器与2段管道以及大球容器连通时,丝网结构能够产生一定的抑爆效果,但抑爆效果不明显;小球容器与3段管道连通时,抑爆位置对连通容器抑爆效果产生较大影响。抑爆位置对连通容器抑爆效果与丝网结构的层数有关。因此,在实际生产应用中,应综合考虑多种因素的影响,以达到最佳的抑爆效果。

Suppressive effect of methane-air mixture explosion in linked vessels

Five experiment test systems with different structures which consist of small spherical vessel, pipe and big spherical vessel were established to study the suppressive effect of methane-air mixture explosion in linked vessels. The factors of methane-air explosion intensity in linked vessels were studied under the condition of different layers of 40 mesh, such as pipe length, mesh layer, secondary vessel and explosion suppression position. The main conclusions are as follows:(1) With the increase of the layer number and the pipe length, the pressure at the end of the pipe is gradually reduced when small spherical vessel is connected with pipes. (2) For the structure of small spherical vessel connected with pipes, the gas explosion intensity increases in linked vessels when the secondary vessel is added. (3) For the linked vessels with two spherical vessels and one pipe, the more the layer number, the better the explosion suppression effect. (4) For the linked vessels with two spherical vessels and two pipes, the explosion suppression effect of mesh exists but is not obvious. (5) For the linked vessels with a small spherical vessel and three pipes, explosion suppression position has a large impact on methane-air mixture explosion. For the linked vessels, the impact of explosion suppression position has something to do with the layer number. In actual production application,different factors should be comprehensively considered in order to choose the best explosion suppression device.