Quenching Methane-Air Ignitions with Water Sprays

Details

• Personal Author:
  Furno, Aldo L. ; Kuchta, Joseph M. ; Sapko, Michael J. ; Furno, Aldo L. ; Kuchta, Joseph M. ; Sapko, Michael J.
• Description:
  The Bureau of Mines conducted laboratory-scale flammability experiments to investigate the possible use of water spray systems for inerting or quenching mine-gas ignitions, such as those encountered at the working face of a coal mine. The inerting results for premixed methane-air-water mixtures indicated that water droplets of less than 10 um tend to be as effective as the vapor. Water requirements for inerting such mixtures were much smaller than those for quenching the sustained flame propagation by the application of water sprays. The minimum water mass concentration for quenching methane-air flames increased linearly with increasing droplet diameter (surface weighted mean) and decreased with increasing spray temperature, whereas the droplet surface area required per unit volume was essentially constant for a given gas mixture composition. Data extrapolations indicated that a quenching system may be feasible for the longwall mining application. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications   ; Mining Publications  
• Subseries:
  Report of Investigations ; Report of Investigations
• Document Type:
  Text
• Genre:
  Conference Publications ; Case Report ; Conference Publications ; Case Report
• CIO:
  National Institute for Occupational Safety and Health (NIOSH) ; National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center ; PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health ; Workplace Safety & Health
• Location:
  North America ; North America
• Pages in Document:
  1-13
• NIOSHTIC Number:
  nn:10000487
• NTIS Accession Number:
  PB-266727
• Citation:
  NTIS#: PB 266 727; :1-13
• Federal Fiscal Year:
  1977
• Peer Reviewed:
  False
• Source Full Name:
  NTIS#: PB 266 727
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:0b485b8b4fd4491b41fc4bcc384e7c0ed3272089d812e19c3bb69ad7984f85dff8284800ef49a31555bdff5863c158deec58c955934b9c227fae050d38463109
• Download URL:
  https://stacks.cdc.gov/view/cdc/237685/cdc_237685_DS1.pdf
• File Type:
  [PDF - 1.10 MB ]