中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (4): 77-81.doi: 10.16265/j.cnki.issn1003-3033.2017.04.014

• 安全工程技术科学 • 上一篇    下一篇

谷物粉尘爆炸特性试验研究

王玉娇, 赵江平 副教授   

  1. 西安建筑科技大学 材料与矿资学院,陕西 西安 710055
  • 收稿日期:2016-11-14 修回日期:2017-01-25 发布日期:2020-11-22
  • 作者简介:王玉娇 (1991—),女,陕西西安人,硕士研究生,研究方向为风险控制理论及技术。E-mail:379274028@qq.com。

Experimental study on explosive characteristics of grain dust in beer enterprise

WANG Yujiao, ZHAO Jiangping   

  1. College of Material Science and Mineral Information,Xi'an University of Architecture & Technology,Xi'an Shaanxi 710055,China
  • Received:2016-11-14 Revised:2017-01-25 Published:2020-11-22

摘要: 为了解国内某啤酒企业平筛工艺过程除尘系统新鲜谷物粉尘爆炸特性,采用1.2 L哈特曼管式粉尘爆炸试验装置进行试验,以研究其粉尘粒径、质量浓度、含水率因素对谷物粉尘爆炸压力(P)及爆炸压力上升速率(dP/dt)的影响。结果表明,该谷物粉尘爆炸下限(LEL)质量浓度为125~166.67 g/m3,质量浓度为291.67g/m3时存在最大爆炸压力Pmax和最大爆炸压力上升速率(dP/dt)max,分别为1.81 MPa和10 MPa/s;dP/dt与P变化具有相似性。谷物粉尘粒径由98~105 μm增加至180~1 250 μm,其LEL质量浓度由50~58.33 g/m3增加至141.67~150 g/m3,且P由0.90 MPa降低至0.72 MPa;含水率由6.39%降低至0(绝对干燥)时,P由1.3 MPa增加至2.1 MPa。

关键词: 谷物粉尘, 爆炸下限(LEL), 爆炸压力, 爆炸压力上升速率, 粉尘粒径

Abstract: In order to learn explosion characteristics of the grain dust collected from the dust removal system for bolting procedure in beer enterprise in China,experiments were carried out by means of an 1.2 L Hartman dust explosion test facility. Influences of particle size, mass concentration, moisture content and on the explosion pressure (P) and the rate of pressure rise (dP/dt) were studied.The results show that grain dust LEL is between 125-166.67 g/m3, that the Pmax is 1.81 MPa and (dP/dt)max is 10 MPa/s when the concentration is 291.67 g/m3,that the change in P and dP/dt are similar, that the increase of the particle size from 98-105 μm to 180-1 250 μm makes the LEL increase from 50-58.33 g/m3 to 141.67-150 g/m3 and the explosion pressure drop from 0.9 MPa to 0.72 MPa,and that the decrease of moisture content from 6.39% to 0% (absolute dry condition) makes explosion pressure increase from 1.3 MPa to 2.1 MPa.

Key words: grain dust, lower explosion limit(LEL), explosion pressure, rate of pressure rise, particle size

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