Inception criteria for entrainment of molten slag droplet in an entrained flow coal gasifier

Jun Inumaru, Hiroaki Watanabe, Maromu Ohtaka, Masami Ashizawa, Kazuyoshi Ichikawa

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Experimental studies using 2 t/d and 200 t/d coal gasifier were carried out to investigate the inception criteria for entrainment of molten slag droplet in an entrained flow coal gasifier. It was clarified that average gas dynamic pressure Pd and liquid film Reynolds number Ref influenced strongly the phenomenon of entrainment of molten slag. The formula of the critical gas dynamic pressure Pdc and the critical Weber number Wec=1.73, which could be applied to the large-scale gasifier, were obtained as inception criteria for the phenomenon. It was clearly shown that the flow pattern in the large-scale gasifier could be different from the smaller gasifier by means of numerical simulation analysis and that the critical velocity Ugc decreases relatively along with the scaling - up of the gasifier.

Original languageEnglish
Pages (from-to)1576-1583
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume75
Issue number756
DOIs
Publication statusPublished - Aug 2009

Fingerprint

dynamic pressure
Gas dynamics
slags
gas dynamics
entrainment
coal
Slags
gas pressure
Molten materials
Coal
critical velocity
Liquid films
Flow patterns
Reynolds number
flow distribution
scaling
Computer simulation
liquids
simulation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Inception criteria for entrainment of molten slag droplet in an entrained flow coal gasifier. / Inumaru, Jun; Watanabe, Hiroaki; Ohtaka, Maromu; Ashizawa, Masami; Ichikawa, Kazuyoshi.

In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 75, No. 756, 08.2009, p. 1576-1583.

Research output: Contribution to journalArticle

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