Experimental Study on Methane Explosion Characteristics in Different Atmospheres
Today, with the rapid development of petrochemical industry, petrochemical products are more and more indispensable in our life, and chemical fiber products have entered thousands of households. With the construction of a large number of gas storage facilities, the probability of gas and oil tank accidents is also increased, and once an explosion accident occurs, the consequences are often very serious. To prevent its explosion and reduce its explosion risk, the key is to deeply study and master its explosion characteristics. At present, many scholars at home and abroad have studied the explosion characteristics, but most of them are the explosion instrument, explosion suppression gas, single gas and so on. In this paper, the explosion limits of methane, ethane and propane were measured by hy12474b combustible gas explosion limit experimental device; Then, the premixed gas was measured by pairwise combination; Through the experimental measurement of the explosion characteristics of binary premixed gas and ternary premixed gas formed by three kinds of gases, the explosion limit, explosion pressure diagram and maximum explosion pressure image are obtained; Different concentrations of nitrogen and oxygen were added into the premixed gas, and the explosion characteristics experiment was continued. The experimental results were analyzed, and the influence degree of non combustible gas on methane premixed gas was obtained; Finally, the differences of explosion characteristics of methane in different atmospheres and the reasons for the differences are summarized as follows. (1) In binary and ternary premixed gases, the explosion limit and the width of explosion range have certain rules. Basically, with the increase of the content of C atom, the explosion limit decreases, and the proportion of C atom is higher, The lower the explosion limit is; The width of explosion domain also decreases with the increase of the proportion of C atom. (2) By comparing the explosion pressure and maximum explosion pressure of single alkanes, binary gaseous alkanes and ternary gaseous alkanes, it is concluded that when different alkanes and methane form premixed gas, the influence ability on the explosion risk of methane premixed gas is C2H6 + C3H8>C3H8>C2H6>CH4. With the decrease of the proportion of C component in the premixed gas, the explosion pressure also decreases to a certain extent. (3) The influence ability of non combustible gas on CH4 premixed gas has the same relationship with the content of C atom, but the addition of O2 can release the explosion risk of C atom. After the addition of O2, the maximum explosion pressure of premixed gas with high content of C atom is higher than that of other gases, and the maximum explosion pressure is the largest; N2and other explosion suppression gases can inhibit the explosion ability of premixed gas and reduce the explosion limit and explosion pressure of premixed gas as a whole.
