Experimental Study Of The Characteristic Of Gas Explosion In 20 L Spherical Hermetic Device

For the worker in mine’s safety, the key point of mine safety is to prevent and controlthese disasters, which sat focus on effectively limiting the explosion area and the damages tothe least degree. The inert gas bringing explosion suppression will be the focus of studying.The damages caused by explosions are majorly appeared as the destruction from the explosionpressure. Starting from the point of gas explosion pressure and the changing regulation ofrelated parameters, a deep and systematic research will provide a further step of proofs forprobable explosion-proof measures.This article uses newly 20L spherical hermetic device which is multi-functional ofexperimenting with gas, liquid vapors and dust. In this device, the expereriment of controllingthe explosion of methane combustion by N₂、CO₂. Through changing the percentage of CH₄、N₂、CO₂, some explosive features such as explosion limits, explosion pressure and theexplosion rate of pressure rising can be studied in the comparison with the inert gas’influenceon the explosion to provide theoretical supports for the gas explosion-proof and controlling.Ranging from 5% to 14%, methane with different concentration are used in thisexperiment. Under this condition, when the explosive concentration of methane is 10%, thenumbers of explosive pressure and explosion rate of pressure rising are the biggest one. Theadding of CO₂ to the methane combustion influences more than that is influenced by theadding of N₂. when the concentration of CH₄ is fixed, the biggest explosive pressure and therate of the rising of the explosion pressure decrease for under the six kinds of densities alongwith the increasing of the N₂、CO₂. This shows that the N₂、CO₂ will indeed suppress theexplosion of the CH₄. when the concentration of N₂、CO₂ respectively reach to 32% and 22%, CH₄ will not explode any more. With the same concentration of the inert gas, the adding ofCO₂ will suppress CH₄more than adding N₂, which describes that CO₂ is more effective thanN₂ as an explosion suppression gas.