摘要：采用实验研究与理论分析相结合的方法研究机械摩擦和过热表面对粉尘层着火温度的影响, 并探究粉尘层的最低着火温度。结果表明:面粉、聚酰胺粉尘、兽药粉因机械摩擦热而点燃的温度分别为310.5、308.5、400.3℃;其粉尘层最低着火温度分别为298℃、288℃、389℃;在企业生产粉尘的过程中, 上述粉尘因机械摩擦造成热积累一直蓄积, 摩擦热如导出不及时, 就会引发火灾与爆炸事故。

关键词：机械摩擦；摩擦热；粉尘；红外热像仪

Abstract：For the study of mechanical friction and heat surface of ignition temperature of dust layer, the experimental study and theoretical analysis method was studied. The results show that the flour dust, polyamide, veterinary medicine powder by mechanical friction heat and light temperature are 310.5, 308.5, 400.3 ℃. The minimum ignition temp erature of dust layer at 298 ℃, 288 ℃and 288 ℃ respectively. Therefore, in the process of production of related companies, the above several dust caused by mechanical friction dust layer on fire accident risk is bigger, need to improve the production process of van measures to prevent dust explosion.

Keywords： mechanical friction； friction heat； dust； infrared thermal imag