东北大学学报(自然科学版) ›› 2024, Vol. 45 ›› Issue (2): 276-281.DOI: 10.12068/j.issn.1005-3026.2024.02.016

• 资源与土木工程 • 上一篇    

连通设备粉尘爆炸泄压面积确定方法

李刚, 周雷, 张晓宇, 张凯   

  1. 东北大学 资源与土木工程学院,辽宁 沈阳 110819
  • 收稿日期:2022-09-19 出版日期:2024-02-15 发布日期:2024-05-14
  • 作者简介:李 刚(1969-),男,河南信阳人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(52274180);中央高校基本科研业务费专项资金资助项目(N180701011)

Determination Method of Pressure Relief Area for Dust Explosion of Connected Equipment

Gang LI, Lei ZHOU, Xiao-yu ZHANG, Kai ZHANG   

  1. School of Resources & Civil Engineering,Northeastern University,Shenyang 110819,China. Corresponding author: LI Gang,E-mail: ligang@ mail. neu. edu. cn
  • Received:2022-09-19 Online:2024-02-15 Published:2024-05-14

摘要:

国内外相关标准提供了单体设备的泄压面积计算方法,但连通设备的准则尚属空白.通过FLACS数值模拟,以玉米淀粉为爆炸介质,探究了连通设备内的泄爆压力和压力上升速率.结果表明:当管道长度一定时,传爆容器内最大泄爆压力随泄压面积增加而降低;在设置相同泄压面积时,传爆容器内的最大泄爆压力随管道长度的增长而增大,且达到最大泄爆压力的时间也随之延后;传爆容器所需最小安全泄压面积大于同等大小单体设备的泄压面积,说明现有单体设备的泄压面积计算方法对于连通设备不适用.通过数值拟合,对标准中单体设备的泄压面积计算公式进行修正,使其满足连通设备安全泄压要求. 研究结果为连通系统的防爆设计提供参考和依据.

关键词: 连通设备, 粉尘爆炸, 数值模拟, 泄爆压力, 泄压面积

Abstract:

The relevant standards at home and abroad offer the calculation method for explosion venting area(EVA) of individual equipment,but there is a notable absence of guidelines for interconnected equipment. By means of FLACS numerical simulation,taking corn starch as the explosion medium,the reduced explosion pressure(REP) and rate of pressure rise in the connected equipment are simulated and explored. The results show that when the length of the pipe is fixed,the maximum REP in the booster vessel decreases with the increasement of the EVA. When the same EVA is set,the maximum REP in the booster vessel increases with the increase of the pipe length,and the time to reach the maximum REP value also delays. The minimum safe EVA required for the booster vessel is larger than that of the single equipment with same size, indicating that the calculation formula of the EVA of the single equipment is unreliable for the connected equipment. Through numerical fitting, the EVA calculation formula for single equipment in the standard was modified to meet the requirement of connected equipment. The research results provide reference for explosion-proof design for connected system.

Key words: connected equipment, dust explosion, numerical simulation, reduced explosion pressure(REP), explosion venting area(EVA)

中图分类号: