SCI和EI收录∣中国化工学会会刊

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 Lü1,2, Liyan Liu1, Guorui Zhu1, Nan Jiang2   

  1. 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 Lü1,2, Liyan Liu1, Guorui Zhu1, Nan Jiang2   

  1. 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: 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