【 Weak current College 】 fighting alcohol fires in several effective ways---Power By 【 China power house network 】

1. alcohol fire should use anti foam suppression. Methanol (CH3OH) is a colorless, flammable liquid clarified can dissolve in water, the freezing point of-97.8 ° c, the boiling point 64.8 ° c, flash point 11.11 ℃, spontaneous combustion point 385 degrees centigrade, explosive limit 6.7% ~ 36%, 715.5kJ/mol heat of combustion, maximum explosion pressure 72.6N/cm2. Methanol, mainly used for formaldehyde, flavor, medicine, fuel, gunpowder, antifreeze.

Alcohol-soluble substances, flammable substances are because of their molecular polarity strong, can absorb the moisture in the foam, foam will soon be destroyed and lost, so you cannot use protein foam and foam-water "," to fight alcohol fire. While anti foam added anti-soluble substances, such as "zinc soap bubble, because" metal SOAP increased foam liquid resistant, resistant to destruction of water-soluble combustible liquids; gel-coated foam, formation of foam mixed fluid in produced neither dissolve in water, insoluble in polar solution of glue film, foam stability and resistance to liquid of better, and better coverage than polar solution level, to achieve the effect of extinguishing fire.

2. water diluted with ordinary foam suppression. Anti foam is mainly used for Suppression of methanol, ethanol, acetone, acetic acid ethyl ester, General water-soluble combustible liquid fire, fire extinguishing General oil and solid fire, but fire suppression costs high, generally not used. However, most of the fire brigade is generally not available on foam, in this case, cooling wall to make it stable combustion, reduced alcohol liquid quantity, large amounts of water to the tank, the strength of the combustion of the diluted significantly lower, then to the tank of spray foam to extinguish the fire. Note that the tank filling foam front, to increase the strength to make wall cooling wall temperature gradually declining; filling foam extinguishing time to break the 5min, extended opposite theory (10min ~ 15min); fire stopped spraying foam, still want to continue cooling wall cooling 0.5h ~ 1h so that fire not easily seen.

3. water method. According to the alcohol substance soluble in water, alcohol, free flowering, fire fog nozzle used water extinguishing suffocation method. Use this method of fire, keep the following issues: (1) you want multiple branches of flowering, the formation of spray nozzles, really powerful water mist, the burning surface covered, at the same time, the water mist mission to try to spray to almost burning liquid surface, such as the tank level is too low, while at the same time, first note the dilution and elevation level close to the wall along the top, and then implement the seal is not untouched; (2) seal time to relative long (20min ~ 30min), so that both can be diluted lower combustion, and can gradually lower the temperature, harmful to water smothering; (3) in the implementation of the water and smothering, on the wall to implement continuous uniform cooling and fire still continue to be on the wall over time, to prevent recurrence of cooling; (4) fire-fighting, to timely processing of methanol aqueous solutions, such as inverted pot, emission and safety service, prevent volatilization incineration causing secondary explosion.