Three conditions that must be possessed by the explosion
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Three conditions that must be possessed by the explosion
1. Three conditions that must be possessed by the explosion: ( 1 ) flammable air flammable dust : A substance that reacts with oxygen (air), including gases, liquids, and solids. (Gas: hydrogen, acetylene, methane, etc.; liquid: alcohol, gasoline; solid: dust, fiber dust, etc.) ( 2 ) Air or oxygen ( air or oxygen ). ( 3 ) Source of ignition : including open flame, electrical spark, mechanical spark, static spark, high temperature, chemical reaction, light energy, etc. Explosive substances: Some flammable substances are produced in many production sites. About two-thirds of the mines in the coal mine have explosive substances. In the chemical industry, about 80% of the production workshops have explosive substances. Oxygen: Oxygen in the air is ubiquitous. Ignition source: A large number of electrical instruments are used in the production process. Various kinds of friction sparks, mechanical wear sparks, static sparks, high temperature, etc. are inevitable, especially when the instrument or electrical fails. Objectively, many industrial sites meet the explosion conditions. When the mixed concentration of explosive substances and oxygen is within the explosion limit, if there is a source of explosion, an explosion will occur. Therefore, it is necessary to take explosion protection. 　　 2 , explosion-proof: to prevent the occurrence of explosion must be considered from three necessary conditions, limiting one of the necessary conditions, which limits the occurrence of the explosion. In industrial processes, inflammable and explosive places are usually dealt with from the following three aspects: ( 1 ) Preventing or minimizing the possibility of leakage of flammable substances; ( 2 ) Do not use or minimize the use of electrical components that are prone to sparking; ( 3 ) Maintain inertness by means of nitrogen filling. 