EP1066857A1 - Appareil d'extinction à azote avec réservoir de stockage - Google Patents

Appareil d'extinction à azote avec réservoir de stockage Download PDF

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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.)
Withdrawn
Application number
EP99113003A
Other languages
German (de)
English (en)
Inventor
Bruno Dr. Covelli
Markus Dr. Müller
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.)
Siemens AG
Original Assignee
Siemens Building Technologies AG
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 Siemens Building Technologies AG filed Critical Siemens Building Technologies AG
Priority to EP99113003A priority Critical patent/EP1066857A1/fr
Publication of EP1066857A1 publication Critical patent/EP1066857A1/fr
Withdrawn legal-status Critical Current

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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)
EP99113003A 1999-07-06 1999-07-06 Appareil d'extinction à azote avec réservoir de stockage Withdrawn EP1066857A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99113003A EP1066857A1 (fr) 1999-07-06 1999-07-06 Appareil d'extinction à azote avec réservoir de stockage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99113003A EP1066857A1 (fr) 1999-07-06 1999-07-06 Appareil d'extinction à azote avec réservoir de stockage

Publications (1)

Publication Number Publication Date
EP1066857A1 true EP1066857A1 (fr) 2001-01-10

Family

ID=8238522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99113003A Withdrawn EP1066857A1 (fr) 1999-07-06 1999-07-06 Appareil d'extinction à azote avec réservoir de stockage

Country Status (1)

Country Link
EP (1) EP1066857A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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