不同粒径PMMA粉尘云火焰温度特性研究

甘波; 高伟; 张新燕; 姜海鹏; 毕明树

doi:10.11883/bzycj-2017-0244

不同粒径PMMA粉尘云火焰温度特性研究

doi: 10.11883/bzycj-2017-0244

甘波¹,
高伟^1, ,,
张新燕^{1, 2},
姜海鹏¹,
毕明树¹

1.
大连理工大学化工机械与安全学院, 辽宁大连 116024
2.
山东科技大学矿业与安全工程学院, 山东青岛 271019

基金项目:

国家自然科学基金 51406023

国家自然科学基金 51674059

中央高校基本科研业务费专项 DUT16QY05

详细信息

作者简介:
甘波(1994-), 男, 硕士研究生

通讯作者:
高伟, gaoweidlut@dlut.edu.cn

中图分类号: O383;X932
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- 被引次数: 0
出版历程
- 收稿日期: 2017-07-10
- 修回日期: 2017-10-02
- 刊出日期: 2019-01-05

Flame temperatures of PMMA dust clouds with different particle size distributions

GAN Bo¹,
GAO Wei^{1
, ,},
ZHANG Xinyan^{1, 2},
JIANG Haipeng¹,
BI Mingshu¹

1.
School of Chemical Machinery and Safety Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
2.
School of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 271019, Shandong, China

摘要

摘要: 为揭示粒径分布对聚甲基丙烯酸甲酯（polymethyl methacrylate，PMMA）粉尘云火焰温度的影响，本文分别采用热电偶和高速比色测温法测量了开敞空间不同粒径PMMA粉尘云的火焰温度特性。结果表明：相比30 μm粉尘粒子，100 nm粉尘粒子热解/挥发速率较快，燃烧更加充分，粉尘云火焰的最高温度可达1 551℃，而30 μm粉尘云火焰最高温度仅为1 108℃；在微米尺度，随着PMMA粉尘粒径的增大，火焰最高温度和高温火焰区面积先增大后减小；20 μm粉尘粒子由于其分散性较好，裂解气化特征时间尺度与燃烧反应特征时间尺度较接近，燃烧反应充分，火焰最高温度和高温火焰区面积均最大。
- PMMA /
- 粉尘爆炸 /
- 粒径分布 /
- 火焰温度
Abstract: In the present study, to find out about the effects of particle size distributions on the flame temperatures of polymethyl methacrylate (PMMA) dust clouds, we measured the flame temperatures of PMMA dust clouds with different particle size distributions using the thermocouple and high-speed colorimetric method. The results show that, due to the faster pyrolysis/volatilization rate of 100 nm dust particle, the temperature was able to reach 1 551℃ while the maximum temperature of 30 μm dust cloud was only 1 108℃. The maximum flame temperature and high temperature flame area increased and then decreased with the increase of PMMA dust particle size for micron-scale. The pyrolysis/volatilization time scale of 20 μm dust particles was close to the combustion reaction time scale because of their good dispersibility. As a result, the maximum temperature and high temperature flame area were the largest among the particles with different particle size distributions.
- PMMA /
- dust explosion /
- particle size distribution /
- flame temperature

HTML全文

图 1 开放式粉尘爆炸火焰传播实验系统示意图

Figure 1. Illustration of experimental setup for open-space dust flame propagation

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图 2 时序控制示意图

Figure 2. Schematic diagram of timing control

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图 3 R型热电偶示意图

Figure 3. Type R thermocouple

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图 4 比色温度测量方法

Figure 4. Colorime temperature measurement

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图 5 PMMA粉尘云火焰温度时程曲线

Figure 5. Flame temperature histories of PMMA dust cloud

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图 6 3 μm的PMMA粉尘云火焰形态和火焰温度分布

Figure 6. Flame configuration and temperature distribution of 3 μm PMMA dust cloud

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图 7 10 μm的PMMA粉尘云火焰形态和火焰温度分布

Figure 7. Flame configuration and temperature distribution of 10 μm PMMA dust cloud

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图 8 20 μm的PMMA粉尘云火焰形态和火焰温度分布

Figure 8. Flame configuration and temperature distribution of 20 μm PMMA dust cloud

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图 9 30 μm的PMMA粉尘云火焰形态和火焰温度分布

Figure 9. Flame configuration and temperature distribution of 30 μm PMMA dust cloud

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图 10 不同粒径PMMA粉尘粒子扫描电镜图

Figure 10. SEM images of PMMA dust particles of different particle sizes

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