Hochiki FirePro Xtinguish, Инструкция по установке и эксплуатации

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FirePro Xtinguish I&O Manual V1.05 UL
5.1 FirePro Xtinguish Condensed Aerosol Fire Extinguishing Reaction Sequence
Oxidation of hydrogen in the flames:
H
2
+ O
2
→ 2 OH -
OH - + H
2
→ H
2
O + H +
H + + O
2
→ OH - + H +
O - - + H
2
→ OH - + H +
Oxidation of carbon monoxide in the flame:
H
2
+ O
2
→ 2 OH
-
OH - + CO + + → CO
2
+ H +
H + + O
2
→ OH - + O - -
Therefore, in the flame, during combustion, further to water and carbon dioxide (stable), only
unstable hydroxyl radicals are formed which allow the reaction to continue (phenomenon of auto
catalysis).
The chain reaction is interrupted by the
Potassium atoms, which react with the unstable
hydroxyl as follows:
OH - + K + → KOH (and flames are thus
extinguished)
Notice that the potassium hydroxide (KOH) is
formed in quantities smaller than micrograms.
The KOH reacts further in the presence of CO
2
and form K
2
CO
3
.
During this process we can verify that the
extinguishing action of potassium compounds is
not achieved either through smothering or
quenching but through a reaction in presence of
flame with consequent termination of the chain
reaction.
Legend:
H
2
Hydrogen stable
O
2
Oxygen stable
OH - Hydroxyl radicals unstable
H
2
O Water stable
H + Hydrogen atoms unstable
O
—
Oxygen atoms unstable
CO + + Carbon monoxide unstable
CO
2
Carbon dioxide stable