Study on Large Flare Stacks (Part 1)

DOI Web Site
  • Honda Tooru
    Maruzen Petrochemical Co., Ltd., Chiba Plant
  • Makihata Toshiaki
    Hitachi Shipbuilding & Engineering Co., Ltd., Technical Research Laboratory
  • Yoguchi Masatoshi
    Hitachi Shipbuilding & Engineering Co., Ltd., Technical Research Laboratory
  • Hori Hiroharu
    Hitachi Shipbuilding & Engineering Co., Ltd., Steel Structure Design Department
  • Ito Takuzen
    Hitachi Shipbuilding & Engineering Co., Ltd., Process Equipment Design Department

Bibliographic Information

Other Title
  • 大型フレアースタックに関する研究 (第1報)
  • On Dynamic Response of the Structures
  • フレアースタックの振動特性について

Description

This paper reports on dynamic response of a large size flare stack supported by tower for a 300, 000ton/year ethylene plant. Oscillations of the structure due to wind, at Strouhal number from 0.1 to 0.4, are measured. The aerodynamic stability of this structure is better than that of a circular cylinder type stack. Earthquake responses of the large size flare stack are computed by means of the modal analysis for multi-degree mass-spring system. Oscillation due to gas discharges through the stack may be increased in proportion to rate of gas, and a small whipping is observed between burner part and top of the tower. However, the oscillation is not large as compared with that caused by the wind or the earthquake.

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