Research On Methane Explosion Characteristics And Explosion Suppression Technology

Gas explosion in coal mine is the most common and most serious accident. Filled withinert gas to inhibit the gas explosion is an effective technique to solve this problem. The studyof the explosive characteristics of methane and the explosion suppression mechanism of inertgas filling and explosion suppression effect for the prevention of gas explosions is with a veryimportant practical significance.This article studied the mechanism of the inert gas supressed the methane explosion byresearching home and abroad explosion suppression technology. By using the 20Lcombustible gas explosion characteristics of test equipment for experiments that the securitycenter construced by their own, the explosion of methane properties and inert explosionsuppression agents nitrogen methane explosion pressure in-depth research, and by contrastingthe influence of explosion limit of methane which filled with inert explosion suppressionagents nitrogen and carbon dioxide. Experimental results show that:1. Reduced explosion pressure with the accession to the increase of nitrogen amount ofmethane in the nitrogen environment of different volume fractions of the explosive tube.Nitrogen may play an inhibitory effect on methane explosion, Increase the relative security ofthe system. the methane explosion pressure was slowly reduced at first with the increase ofnitrogen amount when selected 7%, 9% and 10% of that. When nitrogen reached 30%, 25%and 20%, the pressure suddenly drops to zero,Methane explosion was completely inhibited by.Visible methane explosion pressure by inert explosion suppression agent is more significant.2. After adding the inert gas, Explosive limit of methane in the air changed significantly,Increase in the lower explosion limit, Explosive upper limit decreased, And the upperexplosive limit than the lower explosion limit is more significant. Decreased due to the explosion limit of methane, the lower limit rise, leading to its explosion range decreases,explosion range is gradually reduced with the increasing charging in the amount of inert gas,inert gas filling the intake to a certain concentration of methane explosion on the lower limitof coincidence, the explosion range does not exist.3. The device under the experimental conditions, the amount of carbon dioxide intomethane explosion suppression charge of 22% nitrogen 30%. That is to say, under roomtemperature, when the gas mixture is greater than or equal to 22 percent carbon dioxide, ornitrogen content greater than or equal to 30%, the explosion won’t happen regardless of thecontent of methane gas.4. There is a huge difference with the influence of methane explosion limit because ofthe different inert gas explosion suppression agent, Carbon dioxide to methane explosionlimit the impact of nitrogen, Explosion suppression effects of carbon dioxide better thannitrogen.