WO1998028041A1 - Agent pour le refroidissement de gaz chauds - Google Patents

Agent pour le refroidissement de gaz chauds Download PDF

Info

Publication number
WO1998028041A1
WO1998028041A1 PCT/EP1997/007219 EP9707219W WO9828041A1 WO 1998028041 A1 WO1998028041 A1 WO 1998028041A1 EP 9707219 W EP9707219 W EP 9707219W WO 9828041 A1 WO9828041 A1 WO 9828041A1
Authority
WO
WIPO (PCT)
Prior art keywords
aerosol
agent according
containing gas
cooling
adsorbent
Prior art date
Application number
PCT/EP1997/007219
Other languages
German (de)
English (en)
Inventor
Michael Modigell
Hans-Peter Mackowiak
Original Assignee
Dynamit Nobel Gmbh Explosivstoff- Und Systemtechnik
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 Dynamit Nobel Gmbh Explosivstoff- Und Systemtechnik filed Critical Dynamit Nobel Gmbh Explosivstoff- Und Systemtechnik
Publication of WO1998028041A1 publication Critical patent/WO1998028041A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
    • C06D5/00—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets
    • 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
    • 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
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/006—Extinguishants produced by combustion

Definitions

  • the present invention relates to a means for cooling hot gases, its use for cooling a pyrotechnically produced aerosol-containing gas and a device for cooling hot gases
  • Patent EP 0 637 458 describes a method and a device for producing a fire-extinguishing mixture.
  • a pyrotechnic charge hereinafter referred to as a batch
  • an aerosol-containing gas being produced in the form of a reaction product a jet emerges from the hollow housing and acts as an extinguishing agent.
  • the temperature of the aerosol-containing gas is approximately 1,400 ° C.
  • the object of the present invention was to provide an agent with which hot gases, for example aerosol-containing gases which are used, inter alia, as extinguishing agents, can be cooled. Another object was then to provide a device which facilitates the practical use of the agent according to the invention
  • the high evaporation enthalpy of the water is used for cooling the hot gases, the water being adsorptively bound to a suitable solid.
  • the binding of the water to a solid leads to the coolant having a physically practical form
  • all solids are suitable that can bind water adsorptively and that lose practically no water under normal temperature and humidity conditions.
  • Solids are therefore used as water-carrying adsorbents according to the invention which have an adsorption isobar such that desorption of the water only takes place noticeably when the temperature is noticeably higher than the ambient temperature. This ensures the above condition.
  • Silica gels, silicas or zeolites are preferably used. These agents have a high water absorption capacity. It is an advantage of these adsorbents that they can additionally ensure the moisture content of the extinguishing charge in the optimal range when storing the extinguishing device by a suitable choice of the kink point of the isobars. It is particularly advantageous in the case of the agents mentioned that they are chemically inert and therefore no health-endangering substances are released when they are used for cooling.
  • the masses of agent according to the invention which are required for cooling the hot gases are small.
  • An extinguishing agent set for the pyrotechnic generation of aerosol-containing gas of 100 g releases about 50 I (i.N.) aerosol-containing gas.
  • I i.N.
  • aerosol-containing gas that is 1,400 ° C hot
  • 20 g of water is required, assuming complete conversion.
  • the above-mentioned preferred adsorbents have an absorption capacity of at least 30% by mass for water, so that only about 80 g of dry adsorbent material are required.
  • the agent according to the invention can be arranged in a first embodiment as a fixed bed before the hot gases exit.
  • the adsorbent is used in the form of particles with an average diameter of a few millimeters and with water load it. The diameter of the particles is chosen so large that discharge of solid particles with the gas is reliably prevented.
  • the geometric configuration of the particles and their size are adjusted so that on the one hand the pressure loss of the bed is as small as possible, but on the other hand sufficiently good mass and heat transfer effects between gas and the agent according to the invention are achieved. This is possible, for example, with cylindrical particles with a height-diameter ratio of 2 to 3.
  • Another embodiment provides that the water-laden adsorbent is mixed with the gas to be cooled and the cooling process is carried out along the flow path of the gas.
  • the adsorbent is used in a very fine form (grain diameter approx. ⁇ m) and loaded with water.
  • the advantage here is that it provides a very large specific surface area, thus ensuring optimal heat and mass transfer ratios and thus cooling conditions.
  • the water-laden adsorbent has a similar aerodynamic behavior as the aerosol. As a result, it is led to the extinguishing point with the aerosol-containing gas like the aerosol.
  • it can also act as an extinguishing agent, either through water evaporation or as a shock partner in the course of the combustion reaction to absorb thermal energy.
  • the agent according to the invention can advantageously be used in a device which contains a pyrotechnic charge in a hollow housing for generating an aerosol-containing gas and the agent according to the invention in an annular chamber which is arranged concentrically around the axis of the hollow housing.
  • This annular chamber thus forms an inner channel through which the aerosol-containing gas flows.
  • the inner channel has openings towards the annular chamber which are covered with a low-melting film.
  • the contour of the inner channel is designed so that the gas flowing through the channel has an injector effect.
  • the inner channel is preferably designed as an injector nozzle with a diameter ratio of approximately 3.
  • the openings to the annular chamber are at the narrowest point of the inner channel.
  • the initially flowing hot aerosol-containing gas initially melts the film, so that the subsequent aerosol-containing gas can draw in the agent according to the invention from the annular chamber. Due to the turbulence in the gas jet, the water-laden adsorbent is distributed over the jet cross section and can develop its cooling effect.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Organic Chemistry (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

La présente invention concerne un agent pour le refroidissement de gaz, l'utilisation de cet agent pour refroidir un gaz produit selon un procédé pyrotechnique, contenant un aérosol, ainsi qu'un dispositif pour le refroidissement de gaz chauds.
PCT/EP1997/007219 1996-12-20 1997-12-20 Agent pour le refroidissement de gaz chauds WO1998028041A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19653370.8 1996-12-20
DE19653370 1996-12-20

Publications (1)

Publication Number Publication Date
WO1998028041A1 true WO1998028041A1 (fr) 1998-07-02

Family

ID=7815591

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/007219 WO1998028041A1 (fr) 1996-12-20 1997-12-20 Agent pour le refroidissement de gaz chauds

Country Status (2)

Country Link
DE (1) DE19756779A1 (fr)
WO (1) WO1998028041A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000003765A2 (fr) * 1998-07-17 2000-01-27 R-Amtech International, Inc. Procede et appareil d'extinction d'incendies
WO2005023370A2 (fr) * 2003-09-05 2005-03-17 R-Amtech International, Inc. Composition pour le refroidissement et la filtration simultanee de melange aerosol gaz d'extinction d'incendie

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6251200B1 (en) 1999-06-29 2001-06-26 Uop Llc Process and apparatus for inflating airbags and remediating toxic waste gases
CN1321719C (zh) * 2004-11-08 2007-06-20 中国人民解放军91872部队 电气火灾用消烟剂

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199897A1 (fr) * 1985-05-03 1986-11-05 Hubert von Blücher Application d'un système aqueux contenant des macromolécules gonflées comme eau d'extinction
FR2615399A1 (fr) * 1987-05-22 1988-11-25 Lafarge Nouveaux Materiaux Procede de lutte contre le feu et produit pour la mise en oeuvre du procede
WO1993015793A1 (fr) * 1992-02-11 1993-08-19 Unipas, Inc. Extincteur et procede d'utilisation
WO1994019060A1 (fr) * 1993-02-16 1994-09-01 Spectronix Ltd. Procedes et systemes d'extinction d'incendies
EP0649669A1 (fr) * 1993-10-25 1995-04-26 ÖKO-TEC UMWELTSCHUTZSYSTEME GmbH Agent extincteur de feu et méthode pour sa préparation
WO1995025564A1 (fr) * 1994-03-23 1995-09-28 Pronova Technologie- Und Vertriebsgesellschaft Mbh Generateurs de gaz et leur utilisation dans des extincteurs d'incendie a poudre

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199897A1 (fr) * 1985-05-03 1986-11-05 Hubert von Blücher Application d'un système aqueux contenant des macromolécules gonflées comme eau d'extinction
FR2615399A1 (fr) * 1987-05-22 1988-11-25 Lafarge Nouveaux Materiaux Procede de lutte contre le feu et produit pour la mise en oeuvre du procede
WO1993015793A1 (fr) * 1992-02-11 1993-08-19 Unipas, Inc. Extincteur et procede d'utilisation
WO1994019060A1 (fr) * 1993-02-16 1994-09-01 Spectronix Ltd. Procedes et systemes d'extinction d'incendies
EP0649669A1 (fr) * 1993-10-25 1995-04-26 ÖKO-TEC UMWELTSCHUTZSYSTEME GmbH Agent extincteur de feu et méthode pour sa préparation
WO1995025564A1 (fr) * 1994-03-23 1995-09-28 Pronova Technologie- Und Vertriebsgesellschaft Mbh Generateurs de gaz et leur utilisation dans des extincteurs d'incendie a poudre

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; XP002900201 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000003765A2 (fr) * 1998-07-17 2000-01-27 R-Amtech International, Inc. Procede et appareil d'extinction d'incendies
WO2000003765A3 (fr) * 1998-07-17 2000-06-22 Amtech R Int Inc Procede et appareil d'extinction d'incendies
WO2005023370A2 (fr) * 2003-09-05 2005-03-17 R-Amtech International, Inc. Composition pour le refroidissement et la filtration simultanee de melange aerosol gaz d'extinction d'incendie
WO2005023370A3 (fr) * 2003-09-05 2005-06-02 Amtech R Int Inc Composition pour le refroidissement et la filtration simultanee de melange aerosol gaz d'extinction d'incendie

Also Published As

Publication number Publication date
DE19756779A1 (de) 1998-07-16

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