Suppression of methane/air explosion by water mist with potassium halide additives driven by CO2

doi:10.1016/j.cjche.2019.03.020

中国化学工程学报 ›› 2019, Vol. 27 ›› Issue (11): 2742-2748.DOI: 10.1016/j.cjche.2019.03.020

• Process Systems Engineering and Process Safety • 上一篇下一篇

Suppression of methane/air explosion by water mist with potassium halide additives driven by CO₂

Wei Tan¹, Dong Lü^1,2, Liyan Liu¹, Guorui Zhu¹, Nan Jiang²

1 School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China;
2 Tianjin Fire Research Institute of MEM, Tianjin 300381, China

收稿日期:2018-12-19 修回日期:2019-03-04 出版日期:2019-11-28 发布日期:2020-01-19
通讯作者: Liyan Liu
基金资助:
Supported by the Key Technologies R&D Program of Tianjin (15ZCZDSF00550); the "Strengthen Police Force by Science and Technology" Special Foundation on Basic Research of Ministry of Public Security (2015GABJC28); and the Key Technical Research Plan of Ministry of Public Security (2017JSYJA13).

Suppression of methane/air explosion by water mist with potassium halide additives driven by CO₂

Wei Tan¹, Dong Lü^1,2, Liyan Liu¹, Guorui Zhu¹, Nan Jiang²

1 School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China;
2 Tianjin Fire Research Institute of MEM, Tianjin 300381, China

Received:2018-12-19 Revised:2019-03-04 Online:2019-11-28 Published:2020-01-19
Contact: Liyan Liu
Supported by:
Supported by the Key Technologies R&D Program of Tianjin (15ZCZDSF00550); the "Strengthen Police Force by Science and Technology" Special Foundation on Basic Research of Ministry of Public Security (2015GABJC28); and the Key Technical Research Plan of Ministry of Public Security (2017JSYJA13).

摘要/Abstract

摘要： To enhance the explosion suppression effects of water mist, various potassium halide additives were tested in a confined vessel filled with a 10% mixture of methane/air. Air and CO₂ (0.7 MPa) were used as driver gases. The results revealed that halide additives exhibit considerable suppression effects on explosion overpressure. A 30% KI mist decreased the explosion overpressure by 27.46% compared with the suppression by pure water mist under the same conditions. When CO₂ is used as the driver gas, it will dissolve in water under high pressure. The synergistic effect of a CO₂ solution with an effective additive afforded significant suppression. Under the same conditions, the overpressures suppressed by a mist of 30% KI + 0.7 MPa CO₂ solution decreased by 33.53% compared with those suppressed by pure water mist driven by air. The synergistic suppression effect is much better than that of a 0.7 MPa CO₂ solution mist or 30% KI mist alone. The multicomponent additives can be considered when suppressing methane/air explosions with pressure-formed water mist.

关键词: Methane, Explosion suppression, Water mist, Halide, CO₂

Abstract: To enhance the explosion suppression effects of water mist, various potassium halide additives were tested in a confined vessel filled with a 10% mixture of methane/air. Air and CO₂ (0.7 MPa) were used as driver gases. The results revealed that halide additives exhibit considerable suppression effects on explosion overpressure. A 30% KI mist decreased the explosion overpressure by 27.46% compared with the suppression by pure water mist under the same conditions. When CO₂ is used as the driver gas, it will dissolve in water under high pressure. The synergistic effect of a CO₂ solution with an effective additive afforded significant suppression. Under the same conditions, the overpressures suppressed by a mist of 30% KI + 0.7 MPa CO₂ solution decreased by 33.53% compared with those suppressed by pure water mist driven by air. The synergistic suppression effect is much better than that of a 0.7 MPa CO₂ solution mist or 30% KI mist alone. The multicomponent additives can be considered when suppressing methane/air explosions with pressure-formed water mist.

Key words: Methane, Explosion suppression, Water mist, Halide, CO₂

Wei Tan, Dong Lü, Liyan Liu, Guorui Zhu, Nan Jiang. Suppression of methane/air explosion by water mist with potassium halide additives driven by CO₂[J]. 中国化学工程学报, 2019, 27(11): 2742-2748.

Wei Tan, Dong Lü, Liyan Liu, Guorui Zhu, Nan Jiang. Suppression of methane/air explosion by water mist with potassium halide additives driven by CO₂[J]. Chinese Journal of Chemical Engineering, 2019, 27(11): 2742-2748.

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Suppression of methane/air explosion by water mist with potassium halide additives driven by CO₂

Suppression of methane/air explosion by water mist with potassium halide additives driven by CO₂

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