EP1066857A1 - Stickstoff-Löschanlage mit einem Bevorratungsbehälter - Google Patents
Stickstoff-Löschanlage mit einem Bevorratungsbehälter Download PDFInfo
- Publication number
- EP1066857A1 EP1066857A1 EP99113003A EP99113003A EP1066857A1 EP 1066857 A1 EP1066857 A1 EP 1066857A1 EP 99113003 A EP99113003 A EP 99113003A EP 99113003 A EP99113003 A EP 99113003A EP 1066857 A1 EP1066857 A1 EP 1066857A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nitrogen
- extinguishing system
- storage
- storage container
- extinguishing
- 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.)
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Classifications
-
- 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
- A62C99/0018—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
Definitions
- the present invention relates to a nitrogen extinguishing system with a storage container for nitrogen with a tank valve and a piping system connected to the latter for supplying the nitrogen to the corresponding extinguishing nozzles.
- the invention is now to provide a nitrogen extinguishing system, the storage container From a useful volume of 1,000 l upwards, there are major advantages in price compared to gas cylinders offers.
- This object is achieved in that the storage container for Liquid gas storage of nitrogen is formed in a saturated state, and that storage occurs near the critical point of nitrogen.
- a first preferred embodiment of the extinguishing system according to the invention is characterized in that that storage at a temperature a few degrees below the critical Point.
- the critical temperature is -147 ° C and the critical pressure is 34 bar.
- the tank pressure must be so high that the supply pressure is sufficient Presses the extinguishing gas out of the nozzles quickly enough. The rule is observed that the Nozzle pressure is not less than 10 bar.
- a reservoir pressure of 20 to 30 bar is desired. If you have the supply pressure with 30 bar, then the saturation temperature is -150 ° C, which is a sufficiently high one Distance from the critical temperature of -147 ° C can be maintained.
- a third preferred embodiment of the extinguishing system according to the invention is thereby characterized in that the storage container by a metal tank with a cold insulation is formed, and that this is a refrigeration unit to compensate for the loss of cold to the environment having.
- a fourth preferred embodiment of the extinguishing system according to the invention is characterized in that that the cold insulation is formed by vacuum insulation.
- a further preferred embodiment of the extinguishing system according to the invention is thereby characterized that the refrigeration unit on the principle of direct evaporation of a liquid gas based, which is stored at normal pressure and a temperature below -150 ° C. is.
- the liquid gas intended for evaporation is preferably nitrogen or Air formed.
- the evaporator output is preferably controlled by means of a pressure measurement in the tank.
- the storage container 1 shown consists of a tank 2 and one of these outside surrounding cold insulation 3, which is preferably formed by vacuum insulation is.
- the tank 2 contains a nozzle 4 with a main valve arranged outside the tank 2 5, which is connected to a piping system 6 and with one in the tank 2 protruding dip tube 7.
- a filler neck 8 is provided on the tank 2.
- the tank 2 exists made of a suitable material, for example steel.
- the storage container 1 is used for storing liquid gas in a saturated state.
- This variant of gas storage is used because the standard gas bottles used today can only be used for relatively small extinguishing systems due to the high price and space requirement and the high installation costs, so that larger objects, such as warehouses with more than 5000 m 3, can be used , flooding with nitrogen is practically out of the question.
- Liquid gas storage in the saturated state is known in low-pressure CO 2 extinguishing systems in which CO 2 is stored in the saturated state at 20 bar and -20 ° C. This technology has proven itself for years and has great price advantages compared to gas cylinders from around 1,000 kg.
- the critical pressure of nitrogen is 34 bar and the critical temperature is -147 ° C.
- the Nitrogen must be stored in the storage container 1 under such a high pressure that the Supply pressure the extinguishing gas quickly enough from the nozzles to flood the concerned Room. The rule applies that the nozzle pressure should not be less than 10 bar. Around To be able to install the smallest possible line diameter, a supply pressure between 20 and 30 bar aimed.
- a supply pressure is preferred of 30 bar, which corresponds to a saturation temperature of -150 ° C, which is sufficient large distance from the critical temperature of -147 ° C can be maintained.
- the tank 2 is a steel structure with a design temperature of -200 ° C, the thickness the insulation layer 3 is about 10 to 20 cm.
- the valve 5, for example a ball valve corresponds to the type used for high pressure tanks.
- the tank 2 is through the insulation layer 3 only incompletely protected against loss of cold to the environment, so that a Refrigeration unit 9 with an evaporator 10 arranged in the tank 10 to compensate for this loss of cold must be used.
- a suitable refrigeration unit is that of the U.S. company Ferrofluidics offered system PFC 550, which is used in the production of anhydrous gases (Cold trap) is used.
- a preferred method for compensating for the loss of cold is that the tank 2 with liquid nitrogen with an additional, separately stored liquid gas via direct evaporation is stored. Nitrogen or is also available as an additional liquid gas Air.
- the additional liquid gas provided for cooling is at normal pressure and one Temperature from -190 ° to -210 ° C stored and in a cooling coil in tank 2 with the liquid Nitrogen evaporates. Since the liquid gas intended for evaporation at normal pressure The pressure-free container required for storage can be stored cheaply on the market be bought.
- the regulation of the evaporator power can be done via the pressure measurement provided in the Tank 2 take place, the outflow of the liquid gas intended for cooling from the pressure-free container via a temperature-resistant control valve according to the desired evaporator or cooling capacity is controlled.
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
Claims (9)
- Stickstoff-Löschanlage mit einem Bevorratungsbehälter (1) für Stickstoff mit einem Behälterventil (5) und mit einem an das letztere angeschlossenen Rohrleitungssystem (6) für die Zuführung des Stickstoffs zu entsprechenden Löschdüsen, dadurch gekennzeichnet, dass der Bevorratungsbehälter (1) zur Flüssiggaslagerung des Stickstoffs in gesättigtem Zustand ausgebildet ist, und dass die Lagerung in der Nähe des kritischen Punkts des Stickstoffs erfolgt.
- Löschanlage nach Anspruch 1, dadurch gekennzeichnet, dass die Lagerung bei einer Temperatur einige Grad unterhalb des kritischen Punkts erfolgt.
- Löschanlage nach Anspruch 2, dadurch gekennzeichnet, dass die Lagerung des Stickstoffs bei einem Druck im Bereich zwischen 25 und 33 bar, vorzugsweise bei 30 bar, und der entsprechenden Sättigungstemperatur erfolgt.
- Löschanlage nach Anspruch 3, dadurch gekennzeichnet, dass der Bevorratungsbehälter (1) durch einen Metalltank (2) mit einer Kälteisolation (3) gebildet ist, und dass dieser ein Kälteaggregat (9, 10) zum Ausgleich des Kälteverlusts an die Umgebung aufweist.
- Löschanlage nach Anspruch 4, dadurch gekennzeichnet, dass die Kälteisolation (3) durch eine Vakuumisolation gebildet ist.
- Löschanlage nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Behälterventil (5) aussen am Bevorratungsbehälter (1) angeordnet ist.
- Löschanlage nach Anspruch 4, dadurch gekennzeichnet, dass das Kälteaggregat (9, 10) auf dem Prinzip der Direktverdampfung eines Flüssiggases beruht, welches bei Normaldruck und einer Temperatur unterhalb von -150°C gelagert ist.
- Löschanlage nach Anspruch 7, dadurch gekennzeichnet, dass das zur Verdampfung vorgesehene Flüssiggas durch Stickstoff oder durch Luft gebildet ist.
- Löschanlage nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass die Regelung der Verdampferleistung über eine Druckmessung im Tank (2) erfolgt.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99113003A EP1066857A1 (de) | 1999-07-06 | 1999-07-06 | Stickstoff-Löschanlage mit einem Bevorratungsbehälter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99113003A EP1066857A1 (de) | 1999-07-06 | 1999-07-06 | Stickstoff-Löschanlage mit einem Bevorratungsbehälter |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1066857A1 true EP1066857A1 (de) | 2001-01-10 |
Family
ID=8238522
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99113003A Withdrawn EP1066857A1 (de) | 1999-07-06 | 1999-07-06 | Stickstoff-Löschanlage mit einem Bevorratungsbehälter |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1066857A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107726039A (zh) * | 2017-10-20 | 2018-02-23 | 广东锐捷安全技术股份有限公司 | 一种用于液态气体低温储存的容器组 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3486562A (en) * | 1968-03-08 | 1969-12-30 | David K Goodloe | Fire prevention,detection and extinguishing system |
US3830307A (en) * | 1970-05-11 | 1974-08-20 | Parker Hannifin Corp | Fire prevention and/or suppression system |
US5327732A (en) * | 1991-10-08 | 1994-07-12 | Fernando Martins da Silva | Apparatus for supplying cryogenic fluid, namely nitrogen, to extinguish fires |
FR2725776A1 (fr) * | 1994-10-14 | 1996-04-19 | Abc Protection Environnement S | Generateur de gaz comprime utilise notamment pour l'extinction d'incendie |
-
1999
- 1999-07-06 EP EP99113003A patent/EP1066857A1/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3486562A (en) * | 1968-03-08 | 1969-12-30 | David K Goodloe | Fire prevention,detection and extinguishing system |
US3830307A (en) * | 1970-05-11 | 1974-08-20 | Parker Hannifin Corp | Fire prevention and/or suppression system |
US5327732A (en) * | 1991-10-08 | 1994-07-12 | Fernando Martins da Silva | Apparatus for supplying cryogenic fluid, namely nitrogen, to extinguish fires |
FR2725776A1 (fr) * | 1994-10-14 | 1996-04-19 | Abc Protection Environnement S | Generateur de gaz comprime utilise notamment pour l'extinction d'incendie |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107726039A (zh) * | 2017-10-20 | 2018-02-23 | 广东锐捷安全技术股份有限公司 | 一种用于液态气体低温储存的容器组 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
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