WO2024254961A1 - Agent d'extinction d'incendie en aérosol condensé sans flamme et son procédé de préparation - Google Patents

Agent d'extinction d'incendie en aérosol condensé sans flamme et son procédé de préparation Download PDF

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Publication number
WO2024254961A1
WO2024254961A1 PCT/CN2023/110973 CN2023110973W WO2024254961A1 WO 2024254961 A1 WO2024254961 A1 WO 2024254961A1 CN 2023110973 W CN2023110973 W CN 2023110973W WO 2024254961 A1 WO2024254961 A1 WO 2024254961A1
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WO
WIPO (PCT)
Prior art keywords
fire extinguishing
extinguishing agent
aerosol fire
flameless
additive
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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.)
Ceased
Application number
PCT/CN2023/110973
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English (en)
Chinese (zh)
Inventor
刘心宇
黄瑞
卢发贵
邹蓓蓓
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.)
Hubei Jiandun Fire Technology Co Ltd
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Hubei Jiandun Fire Technology Co Ltd
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Publication of WO2024254961A1 publication Critical patent/WO2024254961A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • A62D1/06—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires containing gas-producing, chemically-reactive components

Definitions

  • the invention belongs to the technical field of fire fighting and extinguishing, and in particular relates to a flameless hot aerosol fire extinguishing agent and a preparation method thereof.
  • Thermal aerosol fire extinguishing technology has been maturely used in the fire protection field and has realized its value in a variety of fire extinguishing products.
  • Existing thermal aerosol fire extinguishing devices are mainly composed of aerosol fire extinguishing agents and coolants. It is difficult to extinguish the flame and cool down the device during use. Some products still have flames, which is not conducive to the use of thermal aerosol fire extinguishing technology in flame-sensitive scenes.
  • the existing technology mainly uses the method of adding external coolants to reduce the intensity of the flames, but it cannot fundamentally solve the problem of flame ejection.
  • the volume of the existing device is also larger due to the large amount of coolant added, which also puts higher requirements on its installation, maintenance and use.
  • the present invention provides a flameless hot aerosol fire extinguishing agent and a preparation method thereof.
  • the fire extinguishing agent can realize the combustion of the agent without generating flames, completely avoid the use of coolants, help to reduce the structure and volume of the fire extinguishing device, reduce the cost of the device, and also promote the application of the device in flame-sensitive scenes.
  • the technical solution of the present invention is a flameless hot aerosol fire extinguishing agent, which comprises the following components in percentage by mass: 50-70% oxidant, 5-30% reductant, 5-20% adhesive and 0.5-5% additive; wherein the additive is one or more of phenolic resin, potassium oxalate, potassium hydrogen phthalate and potassium tartrate.
  • the oxidant is one or more of potassium nitrate, strontium nitrate, sodium nitrate or magnesium nitrate.
  • the reducing agent is one or more of starch, wood powder, charcoal, cellulose, urea, nitroguanidine, melamine, dicyandiamide and 5-aminotetrazole.
  • the binder is one or more of kaolin, clay, bentonite and diatomaceous earth.
  • the additive is phenolic resin, and the added amount is 0.5-2%.
  • the present invention also relates to a method for preparing the flameless thermal aerosol fire extinguishing agent, comprising the following steps:
  • the sieve in S1 is a 100-120 mesh sieve.
  • the amount of ethanol solution added to S2 is 15-30% of the total mass of the mixture; the mass concentration of the ethanol solution is 40-60%.
  • sieve granulation is adopted during granulation in S3, and the sieve aperture is 14-20 mesh.
  • drying temperature is 40-60°C.
  • the adhesive added in the present invention plays the role of bonding each component, and also has the effect of cooling and stable combustion; but after the adhesive is added, in the combustion process of the hot aerosol fire extinguishing agent, it is easy to gather, which will cause the flameless effect to be achieved due to the excessively high local temperature when the agent burns, and will also form a hard layer that hinders the ejection of the fire extinguishing medium, affecting the performance of the fire extinguishing effect of the hot aerosol fire extinguishing agent.
  • the inventor has found that using phenolic resin, potassium oxalate, potassium hydrogen phthalate and/or potassium tartrate as additives, a small amount of which is added to the fire extinguishing agent, helps to accelerate the combustion reaction, so that the adhesive component is not easy to gather quickly, so that the internal temperature distribution is more uniform when the agent burns, and the flameless effect of combustion is achieved, and the uniform release of the fire extinguishing medium is also guaranteed.
  • phenolic resin although it can be used as a refractory material, when it exists with a large amount of oxidants, it can burn, and the combustion is an exothermic reaction, which is conducive to raising the reaction temperature of the agent, so that the burning rate of the agent is accelerated.
  • the hot aerosol fire extinguishing agents reported so far mainly use resin, shellac, cellulose derivatives and other combustible polymer compounds containing carbon, hydrogen and oxygen as adhesives, which are easy to produce combustible gases such as carbon monoxide and hydrogen when burned.
  • combustible gases such as carbon monoxide and hydrogen when burned.
  • the present invention uses non-combustible substances as adhesives, which not only reduces the amount of adhesives that can produce combustible gases, but also hinders the combustible gases produced by combustion during the escape process, preventing the flames from emitting, thereby achieving a flameless combustion effect.
  • a small amount of phenolic resin can ensure the flameless combustion effect of the agent and the uniform release of the fire extinguishing medium.
  • FIG. 1 is a photograph of the combustion process of the hot aerosol fire extinguishing agent in Example 1.
  • FIG. 2 is a photograph of the hot aerosol fire extinguishing agent in Comparative Example 2 after combustion.
  • the invention discloses a preparation method of a flameless hot aerosol fire extinguishing agent.
  • the method comprises the following steps: preliminarily mixing 60% potassium nitrate, 29% starch, 10% kaolin and 1% phenolic resin through a 100-mesh sieve according to mass percentage; further stirring and mixing the mixture, adding a 15% ethanol solution (the mass fraction of ethanol is 40%) thereto, stirring the mixture sufficiently to make the mixture uniform; finally, granulating the mixture through a 20-mesh sieve, and drying the mixture at 50°C to obtain the hot aerosol fire extinguishing agent.
  • the invention discloses a preparation method of a flameless hot aerosol fire extinguishing agent.
  • the method comprises the following steps: preliminarily mixing 65% strontium nitrate, 18% melamine, 15% clay and 2% potassium hydrogen phthalate through a 100-mesh sieve according to mass percentage; further stirring and mixing the mixture, adding a 20% ethanol solution (the mass fraction of ethanol is 40%) thereto, stirring the mixture sufficiently to make the mixture uniform; finally, granulating the mixture through a 20-mesh sieve, and drying the mixture at 50°C to obtain the hot aerosol fire extinguishing agent.
  • the invention discloses a preparation method of a flameless hot aerosol fire extinguishing agent.
  • 55% magnesium nitrate, 25% 5-aminotetrazole, 17% bentonite and 3% potassium tartrate are preliminarily mixed through a 100-mesh sieve, the mixture is further stirred and mixed, a 20% ethanol solution (the mass fraction of ethanol is 50%) is added thereto, the mixture is fully stirred to be uniformly mixed, and finally the mixture is granulated through a 20-mesh sieve, and dried at 50°C to obtain the hot aerosol fire extinguishing agent.
  • the invention discloses a preparation method of a flameless hot aerosol fire extinguishing agent.
  • the method comprises the following steps: preliminarily mixing 50% sodium nitrate, 30% dicyandiamide, 15% clay and 5% potassium oxalate through a 100-mesh sieve according to mass percentage; further stirring and mixing the mixture, adding a 30% ethanol solution (the mass fraction of ethanol is 50%) thereto, stirring the mixture sufficiently to make the mixture uniform; finally, granulating the mixture through a 20-mesh sieve, and drying the mixture at 50°C to obtain the hot aerosol fire extinguishing agent.
  • the invention discloses a preparation method of a flameless hot aerosol fire extinguishing agent.
  • 70% strontium nitrate, 5% charcoal, 20% kaolin and 5% phenolic resin are preliminarily mixed through a 100-mesh sieve, the mixture is further stirred and mixed, a 20% ethanol solution (the mass fraction of ethanol is 60%) is added thereto, the mixture is fully stirred to make the mixture uniform, and finally the mixture is granulated through a 20-mesh sieve, and dried at 50°C to obtain the hot aerosol fire extinguishing agent.
  • the invention discloses a preparation method of a flameless hot aerosol fire extinguishing agent.
  • the method comprises the following steps: preliminarily mixing 50% sodium nitrate, 30% dicyandiamide, 15% bentonite and 5% phenolic resin through a 100-mesh sieve according to mass percentage; further stirring and mixing the mixture, adding a 20% ethanol solution (the mass fraction of ethanol is 60%) thereto, stirring the mixture sufficiently to make the mixture uniform; finally, granulating the mixture through a 20-mesh sieve, and drying the mixture at 50°C to obtain the hot aerosol fire extinguishing agent.
  • Example 7-1 Based on Example 1, the only difference is that the starch is 25% and the phenolic resin is 5%.
  • Example 7-2 Based on Example 1, the only difference is that the starch is 27% and the phenolic resin is 3%.
  • Example 7-3 Based on Example 1, the only difference is that the phenolic resin is replaced by potassium hydrogen phthalate.
  • the invention discloses a preparation method of a flameless hot aerosol fire extinguishing agent.
  • the method comprises the following steps: preliminarily mixing 30% sodium nitrate, 30% potassium nitrate, 10% charcoal, 15% urea, 5% clay, 8% kaolin and 2% phenolic resin through a 100-mesh sieve according to mass percentage; further stirring and mixing the mixture, adding a 20% ethanol solution (the mass fraction of ethanol is 60%) thereto, stirring the mixture sufficiently to make the mixture uniform; finally, granulating the mixture through a 20-mesh sieve, and drying the mixture at 50°C to obtain the hot aerosol fire extinguishing agent.
  • Example 1 Based on Example 1, the only difference is that the raw materials are 60% potassium nitrate, 29% starch, 10% epoxy resin, and 1% phenolic resin.
  • Example 1 Based on Example 1, the only difference is that the raw materials are 60% potassium nitrate, 30% starch, and 10% kaolin, and no phenolic resin is added.
  • Example 1 Based on Example 1, the only difference is that the raw materials are 60% potassium nitrate, 29.9% starch, 10% kaolin, and 0.1% phenolic resin.
  • Example 1 Based on Example 1, the only difference is that the raw materials are 58% potassium nitrate, 28% starch, 8% kaolin, and 6% phenolic resin.
  • the hot aerosol fire extinguishing agents obtained in the above examples and comparative examples were pressed into cylindrical charge columns with a diameter of 32 mm at a pressure of 5 MPa for combustion testing.
  • the test results are shown in Table 1 below.
  • the above table shows the combustion conditions of the hot aerosol fire extinguishing agents prepared in various embodiments.
  • the hot aerosol fire extinguishing agent prepared by the present invention exhibits a combustion temperature below 400°C and no obvious flame phenomenon during combustion.
  • FIG. 1 The photo of the hot aerosol fire extinguishing agent during combustion in Example 1 is shown in Figure 1, and Figure 2 is a photo of the hot aerosol fire extinguishing agent after combustion in Comparative Example 2.
  • Figure 1 The photo of the hot aerosol fire extinguishing agent during combustion in Example 1 is shown in Figure 1, and Figure 2 is a photo of the hot aerosol fire extinguishing agent after combustion in Comparative Example 2.
  • the aggregation phenomenon of the residue after adding additives in the present invention is significantly improved, which is conducive to the uniform release of the fire extinguishing medium and plays an important role in improving the fire extinguishing ability.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing Compositions (AREA)

Abstract

La présente invention concerne un agent d'extinction d'incendie en aérosol condensé sans flamme et son procédé de préparation. L'agent d'extinction d'incendie en aérosol condensé sans flamme comprend les composants suivants, en pourcentage massique : 50 à 70 % d'un agent oxydant, 5 à 30 % d'un agent réducteur, 5 à 20 % d'un adhésif, et 0,5 à 5 % d'un additif, l'additif comprenant un ou plusieurs éléments parmi la résine phénolique, l'oxalate de potassium, l'hydrogénophtalate de potassium et le tartrate de potassium. Dans la présente invention, l'adhésif ajouté a pour fonction de lier les composants et a également les effets de refroidissement et de stabilisation de la combustion. Cependant, après l'ajout de l'adhésif, une agrégation est susceptible de se produire dans le processus de combustion de l'agent d'extinction d'incendie en aérosol condensé. En utilisant une ou plusieurs parmi la résine phénolique, l'oxalate de potassium, l'hydrogène phtalate de potassium et le tartrate de potassium en tant qu'additif et en ajoutant une petite quantité de l'additif à l'agent d'extinction d'incendie, les composants de l'adhésif ne sont pas sujets à une agrégation rapide, de sorte que la distribution de température interne est plus uniforme pendant la combustion d'un agent chimique, ce qui permet d'obtenir un effet de combustion sans flamme et d'assurer également une libération uniforme d'un milieu d'extinction d'incendie.
PCT/CN2023/110973 2023-06-13 2023-08-03 Agent d'extinction d'incendie en aérosol condensé sans flamme et son procédé de préparation Ceased WO2024254961A1 (fr)

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CN202310697988.0A CN116943089B (zh) 2023-06-13 2023-06-13 无焰热气溶胶灭火剂及其制备方法
CN202310697988.0 2023-06-13

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CN118320360A (zh) * 2024-03-01 2024-07-12 湖北及安盾消防科技有限公司 一种气溶胶灭火剂用易分解高性能灭火冷却剂

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