The physical function is mainly to cool down. As far as chemical action is concerned, the free radical radius of fluorine is the smallest among the active groups of halogen atoms, and its ability to capture active groups H+ and OH- in combustion is low. In addition, the generated HF is stable (which is also one of the reasons for generating a large amount of HF). Unlike HBr and HI, which have the function of re-capturing OH- active groups, they have little effect on the fracture of combustion chain. Therefore, the chemical fire extinguishing effect of heptafluoropropane is lower than that of halon 130 1,121.
The main negative effect of heptafluoropropane is the decomposition product HF produced by chemical fire fighting. HF is toxic and corrosive under humid conditions, and reaching a certain concentration will do harm to human body and equipment.
Extended data
Protective zone of heptafluoropropane:
Common protected areas include: computer room, data processing center, telecommunication facilities, process control center, expensive medical facilities, valuable industrial equipment, archives, libraries, museums and art galleries, clean rooms, anechoic rooms, emergency power facilities, flammable liquid storage areas, etc. , and can also be used in the production and operation of places with fire danger.
Such as painting production line, electrical aging room, rolling mill, printing machine, oil switch, oil-immersed transformer, dipping tank, melting tank, large generator, drying equipment, pulverized coal bunker in cement production process, ship engine room, cargo hold, etc. People often work here and need to set up gas protection.
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