EP4161663A1 - Agent d'extinction sec pour éteindre des incendies provoqués par du magnésium - Google Patents

Agent d'extinction sec pour éteindre des incendies provoqués par du magnésium

Info

Publication number
EP4161663A1
EP4161663A1 EP20740163.9A EP20740163A EP4161663A1 EP 4161663 A1 EP4161663 A1 EP 4161663A1 EP 20740163 A EP20740163 A EP 20740163A EP 4161663 A1 EP4161663 A1 EP 4161663A1
Authority
EP
European Patent Office
Prior art keywords
extinguishing agent
dry
fire
extinguishing
fires
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20740163.9A
Other languages
German (de)
English (en)
Inventor
Ulrich MATLSCHWEIGER
Josef HAGAUER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hagauer & Matlschweiger Og
Original Assignee
Hagauer & Matlschweiger Og
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hagauer & Matlschweiger Og filed Critical Hagauer & Matlschweiger Og
Publication of EP4161663A1 publication Critical patent/EP4161663A1/fr
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/06—Fire prevention, containment or extinguishing specially adapted for particular objects or places of highly inflammable material, e.g. light metals, petroleum products
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C99/00—Subject matter not provided for in other groups of this subclass
    • A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
    • A62C99/0045—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using solid substances, e.g. sand, ashes; using substances forming a crust
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
    • A62D1/0007—Solid extinguishing substances
    • A62D1/0014—Powders; Granules
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways

Definitions

  • the invention relates to a dry extinguishing agent for suffocating magnesium fires.
  • Metal fires especially fires based on magnesium or similar reactive metals, can generally not be safely extinguished with conventional extinguishing liquids or gases such as water or carbon dioxide.
  • a water-based extinguishing agent would be split into its constituents, acidic and hydrogen, with the result that there is a risk of oxyhydrogen reactions.
  • carbon dioxide-based extinguishing agents on the other hand, a redox reaction would occur to maintain the metal fire, with carbon dioxide being reduced with the formation of metal oxides.
  • the invention is therefore based on the object of specifying a dry extinguishing agent which enables reliable fire fighting of metal fires, in particular magnesium fires, and which can be produced inexpensively and disposed of in a simple, environmentally friendly manner.
  • the dry extinguishing agent comprises cellulose fiber flakes as a flake extinguishing component, which has an average fiber length of 250 ⁇ m to 750 ⁇ m, preferably 350 ⁇ m to 550 ⁇ m, in particular 390 ⁇ m to 500 ⁇ m, and a mass-related moisture content of less than 10%, preferably less than 5%, in particular between 2 and 3%.
  • the cellulose fiber flakes in turn have a mass fraction of 50 to 100%, in particular from 85 to 100%, of the dry extinguishing agent.
  • cellulose fiber flakes are understood to mean agglomerates composed of cellulose fibers that are entangled with one another and have an average fiber length of 250 ⁇ m to 750 ⁇ m. Such cellulose fiber flakes can be obtained inexpensively, for example, by appropriately cutting waste paper. So far, loose, non-agglomerated cellulose fibers have only been added as an additive due to their binding, dispersing and swelling effects in conjunction with water.
  • cellulose fiber flakes according to the invention used as a dry extinguishing agent are particularly effective in the Fighting metal fires, especially magnesium fires, are because the cellulose fiber flakes can be easily applied to the source of the fire, for example with the help of an extinguishing agent fan, and the source of the fire due to the charring reaction of the cellulose fiber flakes themselves and due to the air-impermeable layer of carbon that is created over the source of the fire Oxygen supply is withdrawn and the seat of the fire is suffocated.
  • the low mass-related moisture content of the cellulose fiber flakes is decisive, since otherwise there is a risk of explosive evaporation of the water and, on the other hand, undesirable side reactions that compete with the charring reaction, such as an oxyhydrogen reaction, could occur, so that the extinguishing mechanism based on oxygen deprivation does not come into play.
  • a dry extinguishing agent according to the invention After a dry extinguishing agent according to the invention has been used, it can be disposed of in a simple manner, for example by sucking off or rinsing the degradation products of the cellulose fiber flakes that have arisen from the charring reaction. These degradation products can also be disposed of, composted or used as fertilizers without any problems.
  • dry extinguishing agent according to the invention is particularly suitable for fighting metal fires, in particular magnesium fires, it can of course also be used effectively to suffocate, for example, liquid fires, solid fuel fires, battery fires and various other types of fire.
  • the dry extinguishing agent contain salts, for example salts based on potassium or sodium chloride and based on borates or boric acid, with a mass fraction of 2 to 20 %, preferably from 10 to 15%, of the dry extinguishing agent.
  • salts for example salts based on potassium or sodium chloride and based on borates or boric acid
  • a mass fraction of 2 to 20 %, preferably from 10 to 15%, of the dry extinguishing agent a mass fraction of 2 to 20 %, preferably from 10 to 15%, of the dry extinguishing agent.
  • a corresponding salt solution can be mixed with the cellulose fiber flakes are mixed so that after the drying process the salt, which acts as a flame retardant, can accumulate on the flakes.
  • cellulose fiber flakes have a calorific value of 3 to 15 MJ / kg, preferably 7 to 12 MJ / kg.
  • the invention also relates to the use of a previously described dry extinguishing agent for fighting magnesium fires, the dry extinguishing agent being applied to a source of fire in such a way that, as a result of the charring reaction of the cellulose flakes, the oxygen supply to the source of the fire is interrupted.
  • a particularly good extinguishing effect can be achieved if the extinguishing agent is applied to the source of the fire from above and / or from the side.
  • the dry extinguishing agent can form a heat barrier, for example to protect the emergency services who apply the dry extinguishing agent to the source of the fire.
  • Application from above can improve the extinguishing effect insofar as this promotes the formation of a coating in the form of a carbon layer that prevents the oxygen supply to the source of the fire.
  • a cooling fluid for example water
  • a cooling fluid for example water
  • a dry protection agent according to the invention comprises cellulose fiber flakes based on waste paper with an average fiber length of 390 ⁇ m and a mass-related moisture content of 2.5%.
  • the cellulose fiber flakes have a mass fraction of 90% of the dry extinguishing agent.
  • the dry extinguishing agent includes boron salts with a mass fraction of 10% of the dry extinguishing agent.
  • a dry extinguishing agent according to the invention can be pressed into larger packages, which are stored on pallets, for example.
  • the cellulose fiber flakes can also be made available in big bags, as are known, for example, for the storage of pellets.
  • an extinguishing device which has an extinguishing agent fan.
  • the extinguishing agent fan comprising a compressed air generating unit, for example a compressor, can be supplied with the dry extinguishing agent via a receiving device, for example a bulk material hopper.
  • the extinguishing agent fan can suck in the flaky dry extinguishing agent and pass it on to a hose line.
  • a dispensing device can be provided, for example in the form of an extinguishing agent gun.
  • the extinguishing agent gun can also be connected to the hose line via a coupling.
  • the couplings can be Storz couplings, for example.
  • the hose line can also be connected to the extinguishing agent fan via a coupling.
  • the dry extinguishing agent is loosened up by the extinguishing agent fan and dosed in a quantity that is favorable for fire fighting, for example through a rotary valve, and conveyed on to the source of the fire and thus applied to it.
  • the dry extinguishing agent can preferably be provided in pressed packets, loosened in the extinguishing agent fan and in the Hose line can be blown in. However, a separate loosening unit can also be provided for the pressed packets.
  • An extinguishing device for a dry extinguishing agent according to the invention can also have a storage container for the dry extinguishing agent. Cellulose fiber particles, for example, can be stored in compressed form in the storage container.
  • the extinguishing agent fan serves as a delivery unit from the storage container.
  • the dry extinguishing agent applied to the source of the fire carbonizes on the surface and removes oxygen from the source of the fire through the carbonization reaction.
  • the carbon layer forms an air-impermeable coating over the material to be burned, so that the oxygen supply to it is also prevented.
  • a cooling fluid for example water
  • evaporating the water heat can be efficiently extracted from the fire, so that the fire residues can be disposed of more quickly and the overall duration of use can be significantly shorter.

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Fire-Extinguishing Compositions (AREA)

Abstract

L'invention concerne un agent d'extinction sec pour éteindre des incendies provoqués par du magnésium. Afin d'obtenir un agent d'extinction sec qui permet de lutter de manière fiable contre les incendies provoqués par des métaux, plus particulièrement les incendies provoqués par du magnésium, qui est économique à produire et qui peut être éliminé d'une manière simple et respectueuse de l'environnement, l'invention propose un agent d'extinction sec qui possède, en tant que composant d'extinction principal, des flocons de fibre de cellulose ayant une longueur de fibre moyenne de 250 µm à 750 µm et ayant une concentration d'humidité inférieure à 10 % en masse.
EP20740163.9A 2020-06-08 2020-06-08 Agent d'extinction sec pour éteindre des incendies provoqués par du magnésium Pending EP4161663A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/AT2020/060232 WO2021248167A1 (fr) 2020-06-08 2020-06-08 Agent d'extinction sec pour éteindre des incendies provoqués par du magnésium

Publications (1)

Publication Number Publication Date
EP4161663A1 true EP4161663A1 (fr) 2023-04-12

Family

ID=71614600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20740163.9A Pending EP4161663A1 (fr) 2020-06-08 2020-06-08 Agent d'extinction sec pour éteindre des incendies provoqués par du magnésium

Country Status (2)

Country Link
EP (1) EP4161663A1 (fr)
WO (1) WO2021248167A1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL53397A0 (en) * 1976-11-22 1978-01-31 Ceca Sa Method and agents for extinguishing metal fires
CA2250339A1 (fr) * 1998-10-15 2000-04-15 D. Lee Manner Materiau absorbant a action retard

Also Published As

Publication number Publication date
WO2021248167A1 (fr) 2021-12-16
WO2021248167A8 (fr) 2022-02-10

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Owner name: HAGAUER & MATLSCHWEIGER OG