(School of Chemical Engineering and Environment, North University of China, Taiyuan 030051, China)
Abstract： To evaluate the explosion hazard of wood dust cloud and ensure safety in production, Godbert -Greenwald furnace apparatus was used to study the influence of dust concentration, particle size and diffusing pressure on the minimum ignition temperature of wood powders. The experimental results show that the sensitive mass concentration of wood powders is 424 g/m3, the minimum ignition temperature at this concentration is 402 ℃ . When the dust particle size changes from 38 to 45 μm, the minimum ignition temperature increase from 474 to 541℃. When the dust mass is 100 mg, diffusing pressure changes from 20 to 50 kPa, the minimum ignition temperature increases from 402 to 440 ℃.
Keywords: dust explosion; wood powders; minimum ignition temperature; diffusing pressure
中图分类号：X932 文献标志码：A
文章编号：1008-5548（2014）05-0045-03
DOI:10.13732/j.issn.1008-5548.2014.05.011
收稿日期：2014-04-18， 修回日期：2014-05-07，在线出版时间：2014-10-11。
基金项目：中北大学研究生科技基金项目，编号：20141137。
第一作者简介：任瑞娥 （1989—），女，硕士研究生，研究方向为粉尘爆炸。 E-mail: 1017819964@qq.com。
