中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (4): 41-46.doi: 10.16265/j.cnki.issn1003-3033.2020.04.007

• 安全工程技术 • 上一篇    下一篇

NH4H2PO4对蔗糖粉尘爆炸的抑制作用试验研究

覃小玲, 李晓泉** 副教授   

  1. 广西大学 资源环境与材料学院, 广西 南宁 530004
  • 收稿日期:2020-01-05 修回日期:2020-03-12 出版日期:2020-04-28 发布日期:2021-01-27
  • 通讯作者: **李晓泉(1972―),男,黑龙江七台河人,博士,副教授,硕士生导师,主要从事粉尘爆炸、数值模拟等研究。E-mail:lxq0927@gxu.edu.cn。
  • 作者简介:覃小玲(1991—),女,广西贵港人,硕士研究生,研究方向为粉尘爆炸的预防和控制。E-mail:741364896@qq.com。
  • 基金资助:
    广西安全生产科技项目(gxaj2016001,gxajsk2015)。

Experimental research on suppression of NH4H2PO4 on sucrose dust explosion

QIN Xiaoling, LI Xiaoquan   

  1. School of Resources, Environment and Materials, Guangxi University, Nanning Guangxi 530004, China
  • Received:2020-01-05 Revised:2020-03-12 Online:2020-04-28 Published:2021-01-27

摘要: 为研究NH4H2PO4粉尘对蔗糖粉尘爆炸的抑制作用,利用20 L球形爆炸试验装置分析NH4H2PO4-蔗糖混合粉尘的最大爆炸压力pmax和最大压力上升速率(dp/dt)max。结果表明:NH4H2PO4能够降低蔗糖粉尘的pmax和(dp/dt)max,并延迟其到达峰值的时间,从而降低蔗糖粉尘的爆炸强度;质量浓度分别为200、350、500、750 g/m3的蔗糖粉尘中NH4H2PO4的质量分数分别达到8%、14%、14%、13%时,蔗糖粉尘被完全惰化;质量浓度为350 g/m3的蔗糖粉尘在不同粒径(48~74、38~47、25~37 μm),NH4H2PO4质量分数分别达到14%、13%、11%时被完全惰化;添加NH4H2PO4能有效减轻蔗糖粉尘的爆炸危害,且在一定粒径范围内,粒径越小,对蔗糖粉尘爆炸的抑爆效果越好。

关键词: NH4H2PO4, 蔗糖粉尘爆炸, 最大爆炸压力, 抑制作用, 爆炸特性

Abstract: In order to study suppression effects of NH4H2PO4 on sucrose dust explosion, the maximum explosion pressure pmax and maximum rate of pressure rise(dp/dt max) of NH4H2PO4-sucrose mixed dust were analyzed through experiment with a 20 L spherical explosion device. The results show that NH4H2PO4can reduce pmax and (dp/dt) max of sucrose dust and delay the time they take to reach peaks, thus weakening intensity of sucrose dust explosion. For sucrose dust whose mass concentration are 200, 350, 500 and 750 g/m3, they would be completely inert when mass fraction of NH4H2PO4 is 8%, 14%, 14% and 13% respectively. That of NH4H2PO4 at different particle sizes (48-74, 38-47, 25-37 μm) which makes 350 g/m3 sucrose dust completely inert is 14%, 13% and 11% respectively. Adding NH4H2PO4 can effectively reduce damage of sucrose dust explosion, and within a certain range of particle size, the smaller it is, the better suppression effect there will be.

Key words: sucrose dust explosion, maximum explosion pressure, NH4H2PO4, suppression effect, explosion characteristic

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