Product quality constraints and logistics dictate that very limited action can
be taken Once pile overheating is suspected. Water cannot be used to reduce pile
temperatures. The dismantling for cooling and rebuilding of a pile are time eonsuming, expensive and possibly dangerous. Where possible compressed air injection can be used for cooling but the dangers of accelerated heating remain.
Monitoring of bagasse stockpile behaviour is most conveniently undertaken
by thermocouple temperature probing. In the absence of any confirmed critical
temperatures in the pile heating sequence, periodic monitoring should occur at
the zone of maximum temperature until this temperature exceeded 80 °C. From
this time, more frequent monitoring should occur at several depths in the one
location (0.5, 1.0, 1.5 m). When the position of the maximum temperature begins
moving toward the pile surface, consideration should be given to undertaking
detailed temperature measurements and bagasse sampling. However the time
scale of the maximum temperature displacement toward the pile surface is
unknown. Results of the Mourilyan stockpile investigations (Figure 2) show that
thermal runaway leading to flaming combustion is imminent once the maximum
pile temperature approaches 90 °C at a depth of 1.0 m.
Product quality constraints and logistics dictate that very limited action canbe taken Once pile overheating is suspected. Water cannot be used to reduce piletemperatures. The dismantling for cooling and rebuilding of a pile are time eonsuming, expensive and possibly dangerous. Where possible compressed air injection can be used for cooling but the dangers of accelerated heating remain.Monitoring of bagasse stockpile behaviour is most conveniently undertakenby thermocouple temperature probing. In the absence of any confirmed criticaltemperatures in the pile heating sequence, periodic monitoring should occur atthe zone of maximum temperature until this temperature exceeded 80 °C. Fromthis time, more frequent monitoring should occur at several depths in the onelocation (0.5, 1.0, 1.5 m). When the position of the maximum temperature beginsmoving toward the pile surface, consideration should be given to undertakingdetailed temperature measurements and bagasse sampling. However the timescale of the maximum temperature displacement toward the pile surface isunknown. Results of the Mourilyan stockpile investigations (Figure 2) show thatthermal runaway leading to flaming combustion is imminent once the maximumpile temperature approaches 90 °C at a depth of 1.0 m.
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