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Apparatus and method to control deflagration of gases

Patent 5495893 Issued on March 5, 1996. Estimated Expiration Date: Icon_subject May 10, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

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Inventors

Assignee

Application

No. 240271 filed on 05/10/1994

US Classes:

169/37, SPRINKLER HEADS137/896With means to promote mixing or combining of plural fluids

Examiners

Primary: Oberleitner, Robert J.
Assistant: Hoge, Gary C.

Attorney, Agent or Firm

International Class

A62C 035/68

Abstract

One aspect of the present invention discloses a deflagration suppression system, which is particularly applicable to deflagrations involving combustible gases. The deflagration suppressant in the system is typically water which is dispersed in the combustible gas as a stream of droplets having a Sauter mean Diameter of no more than about 80 microns. The system can include a combustible substance detector to detect potentially explosive concentrations of a combustible substance, such as the combustible gas, before the onset of a deflagration.Another aspect of the subject invention discloses a liquid atomizing device which is particularly applicable to the deflagration suppression system. The liquid atomizing device atomizes the liquid in a carrier gas and the liquid droplets are further decreased in size by increasing the velocity of the droplets to a supersonic velocity.

Other References

  • Joseph A. Senecal, et al., "Explosion Suppression in Occupied Spaces," Halon Options Technical Working Conference 1994, May 3-5, 1994, pp. 79-86
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  • Joseph A. Senecal, "Explosion Protection in Occupied Spaces: The Status of Suppression and Inertion Using Halon & Its Descendants," Fenwal Safety Systems, 1993, pp. 767-772
  • A. H. Lefebvre, et al., "Spray Characteristics of Aerated-Liquid Pressure Atomizers," J. Propulsion, vol. 4, No. 4, Jul.-Aug. 1988, pp. 293-298
  • Rolf H. Sabersky, et al., Fluid Flow A first Course in Fluid Mechanics, 2nd Ed., pp. 299-303 (1971)
  • D. J. Spring, et al., "Alkali Metal Salt Aerosols as Fire Extinguishants," Halon Alternatives Technical Conference 1993, May 11-13, 1993, pp. 413-419
  • Charles J. Kibert, et al., "Encapsulated Micron Aerosol Agents (EMMA)," Halon Alternatives Technical Conference 1993, May 11-13, 1993, pp. 421-435
  • Bernard Lewis, et al., Combustion, Flames and Explosions of Gases, 3rd Ed., Chapter V, "Combustion Waves in Laminar Flow," pp. 215-218 (1987)
  • James R. Butz, et al., "Application of Fine Water Mists to Fire Suppression," Halon Alternatives Technical Working Conference 1992, May 12-14, 1992, pp. 347-357
  • Arthur E. Cote, P. E., et al., Fire Protection Handbook, 17th Ed., Nov. 1992, pp. 4-42 through 4-67, 5-4 through 13 and 6-184 through 6-20
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