EP1512435A2 - Verfahren und Gerät zum Löschen von Metallbränden - Google Patents
Verfahren und Gerät zum Löschen von Metallbränden Download PDFInfo
- Publication number
- EP1512435A2 EP1512435A2 EP04018219A EP04018219A EP1512435A2 EP 1512435 A2 EP1512435 A2 EP 1512435A2 EP 04018219 A EP04018219 A EP 04018219A EP 04018219 A EP04018219 A EP 04018219A EP 1512435 A2 EP1512435 A2 EP 1512435A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- extinguishing
- extinguishing agent
- liquid
- fire
- metal
- 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.)
- Granted
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C17/00—Hand fire-extinguishers essentially in the form of pistols or rifles
-
- 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
- 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
- A62D1/0028—Liquid extinguishing substances
Definitions
- Metal fires namely fire class D fires (magnesium alloys, aluminum alloys, Lithium alloys, sodium, etc.) make a great deal to this day Problem in firefighting. The reason for this is the violent reaction these metals (especially if they are alkali metals) with even the smallest Amounts of water. To accelerate the combustion process enough already in the surrounding high humidity.
- Metals which are suitable for metal fires are in detail the alkali metals sodium, Potassium, lithium and cesium, further the metals magnesium, calcium and barium, all of which also react violently with water, as well as the metals aluminum, cerium, iridium, Niobium and palladium and also magnesium oxide.
- Extinguishing media are salt (sodium chloride-potassium chloride), extinguishing powder fire class D, sand and gray cast chips. This can only be done covering the burning metal become. A deletion process as such is not present with all these extinguishing agents possible. If the burning metal but only covered by the extinguishing agent, the Delete process for several hours, even days. This poses for metal processors an untenable condition.
- the invention is therefore based on the object, a method for extinguishing metal fires at least to a considerable extent with the identified problems can be avoided.
- the invention operates in contrast to the prior art with a liquid extinguishing agent, which is completely anhydrous and therefore not the risk of fire acceleration is subject to water-reactive metals.
- the liquid extinguishing agent also has no components caused by dissociation or other reactions during the deletion process contain a potential danger.
- the liquid extinguishing agent used in the process according to the invention consists in essentially of polydimethyl siloxane with solids and perfluoro-polyether. It So it is constructed so that it contains no water components. This makes it possible to extinguish the metal fires described above without causing the dissociation of Water or dangerous reactions occurs during the extinguishing process.
- the example of sodium gives, for example, the following reaction formula: R - [(CH 3 ) 2 Si- O- Si (CH) 3 ) 2 ] n + 2n Na + 1 / 2n O 2 -> 2n R- (CH 3 ) 2 Si- O 2 (-) + 2n Na (+) where R denotes the radical and n denotes the length of the polymer chain.
- reaction formula Polydimethylsiloxane + alkali metal + oxygen ⁇ dimethylsilicate of the alkali metal
- the first two effects namely the consumption of oxygen and the Consumption of alkali metal, minimize the available amount of combustible or oxidizing Substance, and the latter effect, namely the formation of a glazing-like Layer above the source of fire, at the same time insulates the entry of new atmospheric oxygen one. Furthermore, the forming glass-like layer due to the relative Good heat conduction for rapid cooling of the fire.
- the abovementioned solids fractions for polydimethyl siloxane can be, for example Melanin or boron and should not exceed 10% of the volume. These solids are helpful in covering the source of the fire to stop unwanted reactions.
- the liquid extinguishing agent may also contain perfluoro-polyether. This is not involved in the silicate formation reaction described above, but has a strong Cooling effect, which is known to be extremely important for firefighting.
- the liquid extinguishing agent it is also essential to apply the liquid extinguishing agent carefully metered onto the burning metal. If the liquid extinguishing agent applied too vigorously, for example in surge form or full jet form, for example, on burning or liquid sodium, it may possibly lead to a reaction with the liquid metal, with the result that the fire is no longer manageable. It is also essential that when applying the liquid extinguishing agent to the burning metal, such as magnesium, the amount of extinguishing agent supplied is in a certain proportion to the mass of the metal, so that no unwanted reactions of the burning metal can be caused.
- liquid extinguishing agent described above has a relatively high viscosity of 100 to 350 mPa.s, this requires the application of a correspondingly high pressure for generating the fine extinguishing agent jets, if this one should have good throw.
- the extinguishing device according to the invention for carrying out the method according to the invention works with an operating pressure of at least 10 bar. This can be done with the liquid Extinguishing agent a throw of about 4 m can be achieved, which is a larger for the user Safety during the deletion process means.
- Previously known metal fire extinguishers (Pulverlöschella) have a throw of only a maximum of about 0.5 m, so that the User is at risk because of the immediate proximity to the fire to a high degree.
- the serving for carrying out the method extinguishing device according to the invention may be a with Charging pressure working fire extinguisher with an extinguishing agent tank in which the liquid Extinguishing agent is subjected to the appropriate operating pressure, an extinguishing agent hose and an extinguishing agent head having a nozzle assembly through a plurality of fine extinguishing agent jets are generated, which are preferably somewhat perpendicular be focused on the fire surface.
- the working pressure of the extinguisher should, as already mentioned, preferably at least 10 bar to preferably about 34 lie bar.
- the extinguishing pistol 1 has a nozzle head 2 in the form of a projecting from the extinguishing gun longer tubular body.
- Whose front end portion 3 can, as seen in the drawing, angled slightly upwards be, for example, about 30 °, and know on its underside a variety of fine discharge nozzles for generating thin extinguishing agent jets, which substantially emerge perpendicular to the erase head end piece 3.
- the extinguishing pistol held so be that the extinguishing agent impinges approximately vertically from above the fire. This applies both when the firing pistol is essentially directly above the source of the fire held, even if the extinguishing pistol is held so obliquely upwards, that a throw of the extinguishing agent beam of a few meters is achieved and the Extinguishing agent jet runs in the arc and then turn about vertically from above on the burning metal impinges.
- the nozzle configuration of the extinguishing device according to the invention also allows an effective Extinguishing metalworking machines in which metal fires occur because the Extinguishing agent can also be effectively placed in the narrowest column of machinery, in which can be burning metal chips.
- the erase device is designed so that it quickly by the operator himself is refillable and ready for use immediately.
- the invention described above thus brings significant advantages in the fight against Metal fires.
- the extinguishing agent for the fire class D can the extinguisher be very simple and operate.
- the fire is going through The special nozzle configuration carefully dosed with extinguishing liquid applied. Thereby wetting of the surface takes place, ie a deletion process in the true sense, and, in addition, the combustible material as well as adjacent areas are affected by the liquid Extinguishing agent cooled.
- liquid extinguishing agent By using the liquid extinguishing agent also eliminates the previously when using extinguishing powder very problematic heavy contamination of production machines and plants, thus reducing the hitherto large downtime and cleaning of production machines can be largely avoided.
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Fire-Extinguishing Compositions (AREA)
- Cookers (AREA)
Abstract
Description
- Verbrauch des verbrennungsfördernden Sauerstoffs,
- Verbrauch des brennenden Alkalimetalls, und
- Ausbildung einer verglasungsähnlichen Schicht über dem Brandherd.
Claims (9)
- Verfahren zum Löschen von Metallbränden durch Aufbringen eines Löschmittels auf den Brandherd, dadurch gekennzeichnet, daß ein vollkommen wasserfreies flüssiges Löschmittel verwendet wird, das mit dem brennenden Metall unter Bindung von Luftsauerstoff und Bildung einer nicht brennbaren Verbindung reagiert, und daß das flüssige Löschmittel in Gestalt einer Vielzahl feiner Löschmittelstrahlen im wesentlichen von oben auf den Brandherd aufgebracht wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als flüssiges Löschmittel Polydimethyl-Siloxan eingesetzt wird.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß das flüssige Löschmittel auch Feststoffanteile wie Melamin und/oder Bor mit einem Mengenanteil bis zu etwa 10% enthält.
- Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß das flüssige Löschmittel außerdem Perfluorpolyäther enthält.
- Löschgerät zur Ausführung des Verfahrens nach einem der Ansprüche 1 bis 4, welches eine Löschpistole (1) mit einem Düsenkopf (2, 3) aufweist, der eine Vielzahl nebeneinander angeordneter feiner Durchtrittsdüsen aufweist, die im wesentlichen parallele feine Löschmittelstrahlen erzeugen.
- Löschgerät nach Anspruch 5, wobei der Löschkopf (2) ein von der Löschpistole (1) wegragender Rohrkörper mit einem etwa flachen Endstück (3) ist, in welchem die Düsen an einer Seite so angeordnet sind, daß die Löschmittelstrahlen etwa senkrecht zur Orientierung des Endstücks austreten.
- Löschgerät nach Anspruch 6, dadurch gekennzeichnet, daß das Endstück (3) des rohrförmigen Löschkopfs (2) mit Bezug auf den übrigen Rohrkörper des Löschkopfs (2) etwas nach oben abgewinkelt ist.
- Löschgerät nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß der Arbeitsdruck etwa 10 bis 34 bar beträgt.
- Löschgerät nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, daß es ein Aufladedruckgerät mit einem Behälter für das flüssige Löschmittel ist, der eine separate, druckdicht verschließbare Einfüllöffnung für das flüssige Löschmittel hat.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10341382A DE10341382A1 (de) | 2003-09-08 | 2003-09-08 | Verfahren und Gerät zum Löschen von Metallbränden |
DE10341382 | 2003-09-08 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1512435A2 true EP1512435A2 (de) | 2005-03-09 |
EP1512435A3 EP1512435A3 (de) | 2005-04-27 |
EP1512435B1 EP1512435B1 (de) | 2008-01-02 |
Family
ID=34129695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04018219A Expired - Lifetime EP1512435B1 (de) | 2003-09-08 | 2004-07-31 | Verfahren und Gerät zum Löschen von Metallbränden |
Country Status (6)
Country | Link |
---|---|
US (1) | US7604065B2 (de) |
EP (1) | EP1512435B1 (de) |
AT (1) | ATE382400T1 (de) |
AU (1) | AU2004210505B2 (de) |
DE (2) | DE10341382A1 (de) |
ES (1) | ES2298653T3 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009015137A1 (de) * | 2009-03-31 | 2010-10-14 | First Value Holdings Ltd. | Verfahren zum Löschen von pyrotechnischen Stoffen |
RU190725U1 (ru) * | 2019-04-26 | 2019-07-10 | Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" (ФГАОУ ВО "ЮУрГУ (НИУ)") | Противопожарное устройство |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013226945A1 (de) * | 2013-12-20 | 2015-06-25 | Continental Teves Ag & Co. Ohg | Löschmittel für Metallbrände und Feuerlöscher |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB278004A (en) * | 1926-09-25 | 1928-01-12 | Excelsior Feuerloschgerate A G | Improvements in or relating to foam fire-extinguishing apparatus |
GB1435617A (en) * | 1972-10-26 | 1976-05-12 | Shinetsu Chemical Co | Silicone rubber compositions |
GB1476241A (en) * | 1973-05-29 | 1977-06-10 | Square D Co | Arc-extinguishing materials |
GB2013215A (en) * | 1977-12-23 | 1979-08-08 | Statni Vyzkumny Ustav Material | Intumescent Composition |
US4272414A (en) * | 1978-05-26 | 1981-06-09 | Monsanto Company | Chemical retardants for forest fires |
US4756839A (en) * | 1986-03-26 | 1988-07-12 | Curzon Jon L | Fire extinguishing composition |
WO1994006517A1 (en) * | 1992-09-15 | 1994-03-31 | Sundholm Goeran | Method and device for fire extinguishing by alternating a liquid fog and a liquid jet |
JPH07238178A (ja) * | 1994-02-25 | 1995-09-12 | Sekisui Chem Co Ltd | 難燃性ポリオレフィン系樹脂発泡用組成物 |
WO1999037365A1 (en) * | 1998-01-23 | 1999-07-29 | Fire Armour Pte Ltd. | Nozzle with axially and perpendicularly directed apertures |
WO2001005468A2 (en) * | 1999-07-20 | 2001-01-25 | 3M Innovative Properties Company | Use of fluorinated ketones in fire extinguishing compositions |
DE10249386B3 (de) * | 2002-10-23 | 2004-07-08 | Pingo Erzeugnisse Gmbh | Mittel zur präventiven und abwehrenden Bekämpfung von Metallbränden |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE722749C (de) * | 1938-06-19 | 1942-07-20 | Messerschmitt Boelkow Blohm | Verfahren und Vorrichtung zum Loeschen von Braenden hochmagnesiumhaltiger und aehnlicher Stoffe |
DE756889C (de) * | 1939-07-09 | 1954-10-04 | Messerschmitt Boelkow Blohm | Vorrichtung zum Loeschen von Braenden hochmagnesiumhaltiger und aehnlicher Stoffe |
NL7110261A (de) * | 1970-07-30 | 1972-02-01 | ||
US3727841A (en) * | 1971-09-07 | 1973-04-17 | R Hengesbach | Multiple jet fluid sprinkling, spraying and diffusing device |
US3698482A (en) * | 1971-09-29 | 1972-10-17 | Factory Mutual Res Corp | Fire protection system utilizing high-capacity direct discharge nozzles |
GB9014766D0 (en) * | 1990-07-03 | 1990-08-22 | Ici Plc | Fire retardant compositions |
US5336847A (en) * | 1991-05-09 | 1994-08-09 | Fuji Electric Co., Ltd. | Stationary induction apparatus containing uninflammable insulating liquid |
GB2277830B (en) * | 1993-05-04 | 1996-10-23 | Programme 3 Patent Holdings | High temperature storage battery |
US6540163B1 (en) * | 2002-10-02 | 2003-04-01 | Dustin Huang | Water spray pistol |
US6719331B1 (en) * | 2003-01-30 | 2004-04-13 | Ming Jen Chen | Telescopic tube with water supply |
-
2003
- 2003-09-08 DE DE10341382A patent/DE10341382A1/de not_active Withdrawn
-
2004
- 2004-07-23 US US10/897,693 patent/US7604065B2/en not_active Expired - Fee Related
- 2004-07-31 EP EP04018219A patent/EP1512435B1/de not_active Expired - Lifetime
- 2004-07-31 ES ES04018219T patent/ES2298653T3/es not_active Expired - Lifetime
- 2004-07-31 AT AT04018219T patent/ATE382400T1/de not_active IP Right Cessation
- 2004-07-31 DE DE502004005808T patent/DE502004005808D1/de not_active Expired - Lifetime
- 2004-09-08 AU AU2004210505A patent/AU2004210505B2/en not_active Ceased
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB278004A (en) * | 1926-09-25 | 1928-01-12 | Excelsior Feuerloschgerate A G | Improvements in or relating to foam fire-extinguishing apparatus |
GB1435617A (en) * | 1972-10-26 | 1976-05-12 | Shinetsu Chemical Co | Silicone rubber compositions |
GB1476241A (en) * | 1973-05-29 | 1977-06-10 | Square D Co | Arc-extinguishing materials |
GB2013215A (en) * | 1977-12-23 | 1979-08-08 | Statni Vyzkumny Ustav Material | Intumescent Composition |
US4272414A (en) * | 1978-05-26 | 1981-06-09 | Monsanto Company | Chemical retardants for forest fires |
US4756839A (en) * | 1986-03-26 | 1988-07-12 | Curzon Jon L | Fire extinguishing composition |
WO1994006517A1 (en) * | 1992-09-15 | 1994-03-31 | Sundholm Goeran | Method and device for fire extinguishing by alternating a liquid fog and a liquid jet |
JPH07238178A (ja) * | 1994-02-25 | 1995-09-12 | Sekisui Chem Co Ltd | 難燃性ポリオレフィン系樹脂発泡用組成物 |
WO1999037365A1 (en) * | 1998-01-23 | 1999-07-29 | Fire Armour Pte Ltd. | Nozzle with axially and perpendicularly directed apertures |
WO2001005468A2 (en) * | 1999-07-20 | 2001-01-25 | 3M Innovative Properties Company | Use of fluorinated ketones in fire extinguishing compositions |
DE10249386B3 (de) * | 2002-10-23 | 2004-07-08 | Pingo Erzeugnisse Gmbh | Mittel zur präventiven und abwehrenden Bekämpfung von Metallbränden |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN Bd. 1996, Nr. 01, 31. Januar 1996 (1996-01-31) & JP 07 238178 A (SEKISUI CHEM CO LTD), 12. September 1995 (1995-09-12) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009015137A1 (de) * | 2009-03-31 | 2010-10-14 | First Value Holdings Ltd. | Verfahren zum Löschen von pyrotechnischen Stoffen |
RU190725U1 (ru) * | 2019-04-26 | 2019-07-10 | Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" (ФГАОУ ВО "ЮУрГУ (НИУ)") | Противопожарное устройство |
Also Published As
Publication number | Publication date |
---|---|
EP1512435A3 (de) | 2005-04-27 |
EP1512435B1 (de) | 2008-01-02 |
DE10341382A1 (de) | 2005-03-31 |
US7604065B2 (en) | 2009-10-20 |
DE502004005808D1 (de) | 2008-02-14 |
ES2298653T3 (es) | 2008-05-16 |
AU2004210505B2 (en) | 2009-01-22 |
AU2004210505A1 (en) | 2005-03-24 |
US20050077056A1 (en) | 2005-04-14 |
ATE382400T1 (de) | 2008-01-15 |
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