Prescription for use of vapor explosion retardant into salt water

Masahiro Furuya*, Takahiro Arai

*この研究の対応する著者

研究成果: Conference article査読

3 被引用数 (Scopus)

抄録

Vapor explosion has been causing disasters in many industries such as metalwork and paper industries. One of the countermeasures is retardant additives into water to stabilize the vapor film which separates two liquids. A spontaneous vapor explosion of a molten tin jet at 700 oC was suppressed with only 0.03 wt% polyethylene glycol aqueous solution for molecular weight of 4×106 g/mol. This is because the solute deposited near the vapor-liquid interface due to the cloud-point phenomenon, that stabilizes vapor film and prevents the solution from mixing finely. Salts are known additives to act as vapor-explosion promoter. Increasing salt concentration requires denser PEG solution to suppress vapor explosion: e.g. 0.03 wt% PEG for water, while 0.07 wt% PEG for sea water and 3 wt% sodium chloride aqueous solution. These salt solutions were selected for practical relevance in industrial disasters. A solid sphere quenching experiment indicates that this threshold concentration of PEG can be determined by the quenching temperature of the solid sphere: the contact temperature of the solid sphere with solution must be sufficiently low (e.g. spontaneous-bubble nucleation temperature of the solution) to suppress the vapor explosion.

本文言語English
ページ(範囲)2439-2446
ページ数8
ジャーナルInternational Heat Transfer Conference
2018-August
DOI
出版ステータスPublished - 2018
外部発表はい
イベント16th International Heat Transfer Conference, IHTC 2018 - Beijing, China
継続期間: 2018 8月 102018 8月 15

ASJC Scopus subject areas

  • 凝縮系物理学
  • 機械工学
  • 流体および伝熱

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