| 王宇,丁炯,杨遂军,王志宇,叶魏涛,叶树亮.气液共存工况下蒸气最小点火能微量测试方法研究[J].火灾科学,2023,32(2):77-84. |
| 气液共存工况下蒸气最小点火能微量测试方法研究 |
| Study on the test method of minimum ignition energy of vapor under the gas-liquid coexistence condition with trace liquid |
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| DOI：10.3969/j.issn.1004-5309.2023.02.01 |
| 基金项目:浙江省属高校基本科研业务费专项资金(2021YW15) |
| 作者 | 单位 | | 王宇 | 中国计量大学工业与商贸计量技术研究所, 杭州,310018 | | 丁炯 | 中国计量大学工业与商贸计量技术研究所,杭州,310018
浙江省化工产品安全测试技术与仪器工程实验室,杭州,310018 | | 杨遂军 | 中国计量大学工业与商贸计量技术研究所,杭州,310018
浙江省化工产品安全测试技术与仪器工程实验室,杭州,310018 | | 王志宇 | 中国计量大学工业与商贸计量技术研究所,杭州,310018
浙江省化工产品安全测试技术与仪器工程实验室,杭州,310018 | | 叶魏涛 | 中国计量大学工业与商贸计量技术研究所,杭州,310018
浙江省化工产品安全测试技术与仪器工程实验室,杭州,310018 | | 叶树亮*0 | 中国计量大学工业与商贸计量技术研究所,杭州,310018
浙江省化工产品安全测试技术与仪器工程实验室,杭州,310018 |
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| 中文关键词: 液体蒸气 最小点火能 气液共存 测试方法 微量液体 |
| 英文关键词:Liquid vapor Minimum ignition energy Gas-liquid coexistence Test method Trace liquid |
| 摘要点击次数: 615 |
| 全文下载次数: 66 |
| 中文摘要: |
| 针对传统最小点火能测试方法不适用于液体化学品气液共存工况的问题,提出了一种微量液体的蒸气最小点火能测试方法。首先设计了小容积实验装置及对应测试流程,通过样品实验确定了敏感电极间隙,并研究了样品量与搅拌对最小点火能测试的影响;测试了样品在不同温度条件下的最小点火能,结合电火花点火机理分析了样品温度与蒸气最小点火能的内在联系,为最小点火能最低值测定提供了指导;最后验证了微量方法的准确性及重复性。实验结果表明: 微量测试方法能够有效测试气液共存工况下液体蒸气的最小点火能,且最小点火能测试值略高于高温蒸气工况,样品最小点火能的相对标准差小于6.0%,重复性良好,为液体化学品的静电燃爆危险性评估提供了技术支撑。 |
| 英文摘要: |
| Aiming at the problem that the traditional test method of minimum ignition energy is not suitable for liquid chemicals under the gas-liquid coexistence condition, a method for measuring the minimum ignition energy of vapor with trace liquid was proposed. Firstly, a small-volume experimental device and the corresponding test flow were designed. The sensitive electrode gap was determined by sample experiment, and the influence of sample volume and stirring on the minimum ignition energy test was studied. The minimum ignition energy of samples at different temperatures was measured, and the internal relationship between sample temperature and the minimum ignition energy of vapor was analyzed in combination with the spark ignition mechanism, which provided guidance for determining the lowest value of the minimum ignition energy. Finally, the accuracy and repeatability of the method of trace liquid were verified. The results show that the method of trace liquid can effectively test the minimum ignition energy of liquid vapor under the condition of gas-liquid coexistence. And the test value of the minimum ignition energy is slightly higher than that under the condition of high-temperature vapor. The relative standard deviation of the minimum ignition energy of samples is less than 6.0%, with good repeatability. This method provides technical support for the electrostatic explosion risk assessment of liquid chemicals. |
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