Page 761 - Dust Explosions in the Process Industries

714 Index

Minimum ignition temperature (continued) Ogle/BeddowNetter theory. 287-288, 299-301
industrial situation, 499 Ohmic energy dissipation, 404406
laboratory tests, 499-504 Oil shale, 140
research, 641 Open flame hazards, 13,61
theories for predicting, 424426 Open-circuit systems (for dust cloud generation),
Moisture content 244246
data, 681 Optical flame detectordsensors, 102
influence of, 28 Organic materials. See also under spec@ names
role of, 28-29, 336,485487 burning velocity, 277-280
Molding, encapsulation by. 567 combustion of, 7,29
Monosized particles theory, flame studies, 277-282
288-290.294 particle size, 29
rates of pressure rise. 26-27
self-ignition, 403
Nagy and Verakis venting theory, 463 thermal behavior, 403
NagylConnNerakis theories, 294-297 Oxidation reaction, cooling of, 59-60
National Fire Protection Association (NFPA) Oxidizer gas, oxygen content of, 39-44
dust explosions in United States (1900-1956) Oxygen concentration
per, 21-22 data, maximum, 703
gases versus dusts, 558 for inerting, 599
nomograph method, 43 1,446 Oxygen content influence in oxidizing gas,
standards, 141, 553 540-542
vent scaling procedure, 455456,627 Oxygen detectors/sensors, 69
vent sizing, 453, 455
vented dust explosions and, 461
Nature of dust explosions, 1-20 Partial inerting, 69, 625-626
ignition sources, 10, 11-20 Particle dislodgment/entrainment
materials that can cause, 5-7 in parallel airflow, 221-229
phenomenon, 1-5 in upwards airflow, 230-232
range of dust concentrations, 7-10 Particle size, 2-3, 29-34
Nomograph analysis, 479480
maximum experimental safe gap and, 351 data, 68 1, 682
self-ignition, 390 distribution, determining, 232, 233, 234
vent sizing method, 431433,437,446,453 dust clouds and, 199
vented dust explosions and, 461,462 Particles. flow pattern of, 584
Nomura and Tanaka laminar burning in closed Particles movement and inertial forces influence,
vessels, 298-299, 318 557-558
Nomura and Tanaka monosized particles theory. Particles suspended in a gas, 213-221
288-290 drag on, 215-218
Nomura and Tanaka venting theory, 462463 movement of, 218-219
Nordtest Fire 011 method, 3 10, 3 11 propagation of large-amplitude pressure waves
MEC results, 522-523, 524 in dust clouds, 221
Nordtest Fire 016 method, 505-508 speed of sound in dust cloud, 219-220
Norwegian vent sizing method, 434, 438 terminal settling velocity, 2 13-2 15
Nozzle(s) Passive devices, explosion isolation, 75,77-78
cyclone experiments and, 445 Peat dust
Dahoe, circular, 585 bag filters experiments, 448451
dispersal of agglomerates by, 232-234, 241, computer model, 364-366
242,333 literature survey, 135-136
Mache-Hebra type, 270 Personal motivation (in explosion prevention),
nomograph method and, 432 118-120
perforated annular, 585 Perspex
rebound design, 531,532,585 cylinder, 541
turbulence intensity experiment and, 457 glass tube, 488, 542
Nusselt number, 258, 261 window. 3 13
Nusselt type flames, 268, 290 Pipelines, experiments in, 443444, 604