Preventing Dust Explosions - PowerPoint PPT Presentation

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Preventing Dust Explosions

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  1. Preventing Dust Explosions Agenda • Program overview • Explosion statistics • Dust explosion properties • Ignition sources • Dust explosion locations • Preventing explosions • Deadly Dust II - video

  2. Safety program changes Safety inspections Safety training Safety audits Grain handling practices Housekeeping Preventive maintenance Program Overview

  3. CompanyLocation Date Damage Butterball TurkeySherwin, KS2/99 $50-$500 Farmers Coop Co. Craig, IA 4/99 $50-$500K, 1 hurt Amick FarmsMonetta, SC 8/99 $50-$500K, 10 hurt Reedsville CoopReedsville, WI 10/99$500K+ 7 hurt 1999Explosion Statistics

  4. Fuel (grain dust) Dust Explosion Properties How an explosion occurs 1) Dust has to be combustible 2) Particles form a cloud exceeding min. explosion concentrations 3) Dust is confined 4) Ignition source is present Confined Space (equipment, building) Oxygen Ignition Source

  5. Ignition Sources Welding 17.2% Friction Sparks 2.8% Electrical Failure 4% Tramp Metal 4% Hot Bearings 2.8% Feed Mills Fire Besides Welding 4% Choked Leg Friction 3.2% FOD 3.6%

  6. Bucket elevators Roller mills Storage bins or tanks Headhouse Dust collector Dust Explosion Locations

  7. Good housekeeping Floor areas within 35 ft of inside bucket elevators Floors of enclosed areas having grinding equipment Floors of enclosed areas having grain dryers Preventing Dust Explosions

  8. Preventive maintenance Looking at all mechanical and safety control equipment associated with preventing fires Examples: dryers, dust collection equipment, bucket elevators Preventing Dust Explosions

  9. Blowdown operations Shut down machinery which presents an ignition source Remove all other potential ignition sources Preventing Dust Explosions • Employee participation