A method for reducing the amount of hydrogen fluoride generated during a fire involving a fluorine-containing fire extinguishing agent

Abstract

The present application relates to the field of gas fire extinguishing agent, especially to a fluorine-containing gas fire extinguishing composition, the composition of the fluorine-containing gas fire extinguishing composition includes perfluoroketone fire extinguishing agent and hydrogen fluoride inhibitor.The fluorine-containing compound fire extinguishing composition of the present application is transparent, has no stratification during storage, has good compatibility of mixed liquid system, is friendly to environment, has good fire extinguishing effect, and can effectively reduce the generation of toxic product hydrogen fluoride during the fire process, and reduce the danger of fire extinguishing agent after fire extinguishing.

Description

Technical Field

[0001] This invention relates to the field of gaseous fire extinguishing agents, and in particular to a fluorine-containing gaseous fire extinguishing agent composition and its application. Background Technology

[0002] Hydrogen fluoride (HF) is a gas with an irritating odor. Inhalation or exposure to certain concentrations of HF gas over a given period of time can harm animals and humans. The higher the concentration of hydrogen fluoride in the air, the shorter the permissible time for humans and animals to remain in the atmosphere.

[0003] Hydrogen fluoride is a thermal decomposition product of HFCs (hydrofluorocarbons) and a major toxic product of fluorinated gas extinguishing agents during the extinguishing process. In fluorinated clean gas extinguishing agents, hydrogen fluoride is the main toxic product during cracking. The generated hydrogen fluoride not only corrodes experimental equipment, but also, if the concentration is too high, may endanger the lives of experimental personnel.

[0004] Chen Tao et al. from the Tianjin Fire Research Institute of the Ministry of Emergency Management (Document No.: 1009-6094(2011)03-0157-04) used semiconductor laser absorption spectroscopy to test in real time that hydrofluorocarbon extinguishing agents such as heptafluoropropane, trifluoromethane, and hexafluoropropane all produce hydrogen fluoride during their interaction with flames. The results showed that when the extinguishing time exceeded 10 seconds, the mass concentration of hydrogen fluoride produced by heptafluoropropane reached as high as 4000 mg / m³. 3 .

[0005] Similar to heptafluoropropane, the main hazardous substance produced by the thermal decomposition of perfluorohexanone in a fire is HF, which is the primary source of its toxicity and corrosiveness. Compared to hydrofluorocarbon extinguishing agents such as heptafluoropropane, perfluorohexanone produces a higher proportion of HF when in prolonged contact with fire.

[0006] Chen Peiyao et al. from the Tianjin Fire Research Institute of the Ministry of Emergency Management (Document No.: 1009-0029(2020)09-1277-03) simulated the behavior of perfluorohexanone (PFH) pyrolysis at high temperatures and the conditions affecting hydrogen fluoride (HF) production using a tubular pyrolysis furnace. The results showed that the HF production behavior of PFH extinguishing agents is not significantly affected by the production process and is determined by its own chemical structure. PFH extinguishing agents begin to thermally decompose at 500℃, producing hydrogen fluoride. When the temperature rises to 550–600℃, the amount of hydrogen fluoride produced increases rapidly. When the temperature exceeds 700℃, the pyrolysis reaction is inhibited, but a certain amount of hydrogen fluoride is still produced, accounting for 20%–30% of the original extinguishing agent.

[0007] Currently, domestic and international standards and specifications for clean gas fire suppression systems, such as ISO 14520, NFPA 2001, and GB50370, all incorporate measures to control hydrogen fluoride gas production in system design, such as increasing the design concentration of the extinguishing agent (e.g., increasing it to 1.3 times the extinguishing concentration) or controlling the release time. Existing technologies do not disclose designs that utilize extinguishing agent formulation optimization to control hydrogen fluoride generation. Summary of the Invention

[0008] To address the aforementioned technical problems, this invention proposes a method for suppressing the generation of hydrogen fluoride during the fire process of fluorine-containing fire extinguishing agents, a fire extinguishing composition, and its application. This fire extinguishing composition is simple to prepare, has good fire extinguishing effect, effectively suppresses the generation of the toxic product hydrogen fluoride, reduces the fire extinguishing hazard of the fire extinguishing agent, and is relatively environmentally friendly. The objective of this invention is achieved through the following technical solutions:

[0009] A method for reducing the amount of hydrogen fluoride generated during the fire process of fluorine-containing fire extinguishing agents involves using a composition containing perfluoroketone compounds and hydrogen fluoride inhibitors for fire extinguishing.

[0010] The perfluoroketone compound in the fire extinguishing composition is the fire extinguishing agent, and the perfluoroketone compound accounts for 80% to 98% of the composition by mass. The amount of hydrogen fluoride inhibitor in the composition does not exceed 20% by mass, preferably, the amount of hydrogen fluoride inhibitor in the composition is 2% to 20% by mass.

[0011] The present invention has found that when the amount of hydrogen fluoride inhibitor added is greater than 20%, the fluorine-containing compound fire extinguishing agent will precipitate crystals under low temperature conditions, affecting the inhibitory effect of the hydrogen fluoride inhibitor; when the amount of hydrogen fluoride inhibitor added is less than 2%, the hydrogen fluoride inhibitory effect is not obvious.

[0012] The perfluoroketone compound is selected from one or more low-boiling-point perfluoroketone compounds, preferably at least one of perfluoropentanone, perfluorohexanone, and perfluoroheptanone.

[0013] The hydrogen fluoride inhibitor is selected from at least one of phosphorus nitrogen compounds, fluorosulfate compounds, and fluorosulfonyl diamine compounds; preferably, the hydrogen fluoride inhibitor is selected from at least one of phosphorus nitrogen compounds and fluorosulfonyl diamine compounds.

[0014] Preferably, the phosphorus-nitrogen compound is selected from at least one of hexachlorocyclotriphosphazene, hexafluorocyclotriphosphazene, pentafluoromonochlorocyclotriphosphazene, tetrafluorodichlorocyclotriphosphazene, ethoxypentafluorocyclotriphosphazene, trifluoroethoxypentafluorocyclotriphosphazene, or pentafluorophenoxycyclotriphosphazene.

[0015] The fluorosulfate compound is selected from at least one of hexafluoroisopropyl fluorosulfate, trifluoroethyl fluorosulfate, perfluoroisobutyl fluorosulfate or perfluoron-butyl fluorosulfate;

[0016] The fluorosulfonyl diamine compound is selected from at least one of bis(trifluoromethyl)sulfonyl diamine, trifluoromethyl(hexafluoroisopropyl)sulfonyl diamine, or bis(hexafluoroisopropyl)sulfonyl diamine.

[0017] More preferably, the hydrogen fluoride inhibitor is selected from at least one of hexachlorocyclotriphosphazene, hexafluorocyclotriphosphazene, ethoxypentafluorocyclotriphosphazene, bis(trifluoromethyl)sulfonyldiamine, and bis(hexafluoroisopropyl)sulfonyldiamine.

[0018] This invention has found that the hydrogen fluoride inhibitor used in this invention can, through the interaction between the additive and the extinguishing agent during the extinguishing process of fluorine-containing gas extinguishing agents, change the thermal decomposition path of the extinguishing agent, making the breaking of C-C bonds the dominant method of extinguishing, thereby reducing the defluorination reaction and the generation of toxic products during the extinguishing process.

[0019] A fire extinguishing composition for reducing the amount of HF generated during the fire process of fluorine-containing fire extinguishing agents, said composition being the above-mentioned composition containing perfluoroketone compounds and hydrogen fluoride inhibitors.

[0020] A fire suppression system using the aforementioned composition of a fluorinated ketone compound and a hydrogen fluoride inhibitor. Preferably, the fire suppression system is selected from total flooding fire suppression systems.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] (1) The fluorine-containing fire extinguishing composition of the present invention does not separate into layers during storage, has good compatibility with the mixed liquid system, is environmentally friendly, and has a good fire extinguishing effect;

[0023] (2) The fluorine-containing fire extinguishing composition of the present invention can effectively inhibit the generation of toxic hydrogen fluoride during the fire process and reduce the fire extinguishing hazard of the fire extinguishing agent.

[0024] (3) The method for preparing the fluorine-containing fire extinguishing composition of the present invention is simple and easy to operate. Specific implementation methods

[0025] The present invention will be further described below with reference to specific embodiments, but the invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all alternatives, improvements, and equivalents that may be included within the scope of the claims.

[0026] In the following examples, the preparation of the fluorine-containing gas compound fire extinguishing agent was carried out according to the mass percentage.

[0027] Example 1

[0028] In a dry environment, 2% hexachlorocyclotriphosphazene is added to 98% perfluorohexanone, and the mixture is shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix it evenly, thus obtaining the fluorine-containing compound fire extinguishing agent.

[0029] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluorohexanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 15% and decreased the amount of hydrogen fluoride generated after fire extinguishing by 25.11%.

[0030] Example 2

[0031] In a dry environment, 5% hexachlorocyclotriphosphazene is added to 95% perfluorohexanone, and the mixture is shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix it evenly, thus obtaining the fluorine-containing compound fire extinguishing agent.

[0032] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluorohexanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 25% and decreased the amount of hydrogen fluoride generated after extinguishing by 46.36%.

[0033] Example 3

[0034] In a dry environment, 10% hexafluorocyclotriphosphazene is added to 90% perfluorohexanone, and the mixture is shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix it evenly, thus obtaining the fluorine-containing compound fire extinguishing agent.

[0035] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluorohexanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 30% and decreased the amount of hydrogen fluoride generated after fire extinguishing by 49.78%.

[0036] Example 4

[0037] In a dry environment, 20% ethoxypentafluorocyclotriphosphazene is added to 80% perfluorohexanone, and the mixture is shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix it evenly, thus obtaining the fluorine-containing compound fire extinguishing agent.

[0038] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluorohexanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 32% and the amount of hydrogen fluoride generated after extinguishing by 53.44%.

[0039] Example 5

[0040] In a dry environment, 10% ethoxypentafluorocyclotriphosphazene is added to 90% perfluorohexanone, and the mixture is shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix it evenly, thus obtaining the fluorine-containing compound fire extinguishing agent.

[0041] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluorohexanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 29% and decreased the amount of hydrogen fluoride generated after fire extinguishing by 48.72%.

[0042] Example 6

[0043] In a dry environment, 10% ethoxypentafluorocyclotriphosphazene and 10% bis(trifluoromethyl)sulfonyl diamine are added to 80% perfluorohexanone. The mixture is then shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix the mixture evenly. This process yields the fluorine-containing compound fire extinguishing agent.

[0044] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluorohexanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 30% and decreased the amount of hydrogen fluoride generated after fire extinguishing by 50.21%.

[0045] Example 7

[0046] In a dry environment, 20% hexafluoroisopropyl sulfate is added to 80% perfluorohexanone, and the mixture is shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix it evenly, thus obtaining the fluorine-containing compound fire extinguishing agent.

[0047] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluorohexanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 28% and the amount of hydrogen fluoride generated after extinguishing by 47.25%.

[0048] Example 8

[0049] In a dry environment, 10% ethoxypentafluorocyclotriphosphazene and 10% hexafluoroisopropyl sulfate are added to 80% perfluorohexanone. The mixture is then shaken for 5 minutes at a frequency of 200 times / min, an amplitude of 20 mm, and a temperature of 20°C to disperse and mix the mixture evenly. This process yields the fluorine-containing compound fire extinguishing agent.

[0050] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluorohexanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 29% and the amount of hydrogen fluoride generated after extinguishing by 48.19%.

[0051] Example 9

[0052] In a dry environment, 10% bis(trifluoromethyl)sulfonyl diamine is added to 90% perfluoroheptanone, and the mixture is shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix it evenly, thus obtaining the fluorine-containing compound fire extinguishing agent.

[0053] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluoroheptanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 28% and decreased the amount of hydrogen fluoride generated after fire extinguishing by 47.74%.

[0054] Example 10

[0055] In a dry environment, 20% hexafluorocyclotriphosphazene is added to 80% perfluoroheptanone, and the mixture is shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix it evenly, thus obtaining the fluorine-containing compound fire extinguishing agent.

[0056] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluoroheptanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 31% and decreased the amount of hydrogen fluoride generated after fire extinguishing by 52.67%.

[0057] Example 11

[0058] In a dry environment, 10% ethoxypentafluorocyclotriphosphazene and 10% hexafluorocyclotriphosphazene are added to 80% perfluoroheptanone. The mixture is then shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix the mixture evenly. This process yields the fluorine-containing compound fire extinguishing agent.

[0059] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluoroheptanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 29% and the amount of hydrogen fluoride generated after extinguishing by 49.25%.

[0060] Example 12

[0061] In a dry environment, 20% hexafluoroisopropyl fluorosulfate is added to 80% perfluoroheptanone, and the mixture is shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix it evenly, thus obtaining the fluorine-containing compound fire extinguishing agent.

[0062] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluoropentanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 27% and decreased the amount of hydrogen fluoride generated after fire extinguishing by 45.30%.

[0063] Example 13

[0064] In a dry environment, 10% ethoxypentafluorocyclotriphosphazene and 10% hexafluoroisopropyl sulfate are added to 80% perfluoroheptanone. The mixture is then shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix the mixture evenly. This process yields the fluorine-containing compound fire extinguishing agent.

[0065] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluorohexanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 28% and decreased the amount of hydrogen fluoride generated after fire extinguishing by 46.86%.

[0066] Example 14

[0067] In a dry environment, 5% pentafluorochlorocyclotriphosphazene and 5% bis(hexafluoroisopropyl)sulfonyl diamine are added to 90% perfluoropentanone. The mixture is then shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix the mixture evenly. This process yields the fluorine-containing compound fire extinguishing agent.

[0068] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluoropentanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 28% and decreased the amount of hydrogen fluoride generated after fire extinguishing by 46.78%.

[0069] Example 15

[0070] In a dry environment, first mix 45% perfluoropentanone and 45% perfluorohexanone in controlled amounts, then add 10% hexafluorocyclotriphosphazene, and use a shaker to shake for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20mm, and a temperature of 20℃ to disperse and mix them evenly, and the fluorine-containing compound fire extinguishing agent can be obtained.

[0071] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluoropentanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 26% and the amount of hydrogen fluoride generated after extinguishing by 43.28%; compared to pure perfluorohexanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 29% and the amount of hydrogen fluoride generated after extinguishing by 48.62%.

[0072] Example 16

[0073] In a dry environment, 15% hexafluorocyclotriphosphazene is added to 85% perfluorohexanone, and the mixture is shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix it evenly, thus obtaining the fluorine-containing compound fire extinguishing agent.

[0074] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluorohexanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 36% and decreased the amount of hydrogen fluoride generated after extinguishing by 60.26%.

[0075] Example 17

[0076] In a dry environment, 15% bis(trifluoromethyl)sulfonyl diamine is added to 85% perfluoroheptanone, and the mixture is shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix it evenly, thus obtaining the fluorine-containing compound fire extinguishing agent.

[0077] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluoroheptanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 33% and decreased the amount of hydrogen fluoride generated after fire extinguishing by 58.19%.

[0078] Comparative Example 1

[0079] In a dry environment, 25% hexafluorocyclotriphosphazene is added to 75% perfluorohexanone, and the mixture is shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix it evenly, thus obtaining the fluorine-containing compound fire extinguishing agent.

[0080] However, this compound extinguishing agent showed crystal precipitation after being left at 5°C for 24 hours. With the precipitation of hydrogen fluoride inhibitors, it was unable to effectively suppress the formation of hydrogen fluoride during the fire process.

[0081] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluorohexanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 3% and decreased the amount of hydrogen fluoride generated after extinguishing by 6.74%.

[0082] Comparative Example 2

[0083] In a dry environment, 1% hexachlorocyclotriphosphazene is added to 99% perfluorohexanone, and the mixture is shaken for 5 minutes at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 20°C to disperse and mix it evenly, thus obtaining the fluorine-containing compound fire extinguishing agent.

[0084] Fire extinguishing tests were conducted using a cup burner. Under conditions of an air velocity of 20 L / min and a compound extinguishing agent dosage of 13 g / min, the amount of hydrogen fluoride generated after fire extinguishing was analyzed online using a laser gas analyzer. Compared to pure perfluorohexanone extinguishing agent at the same flow rate, this compound extinguishing agent reduced the extinguishing time by 4% and decreased the amount of hydrogen fluoride generated after extinguishing by 3.77%.

[0085] The results of Examples 1-12 show that the fluorine-containing compound fire extinguishing agent of the present invention can effectively reduce the amount of hydrogen fluoride generated during the fire extinguishing process, by up to 50% or more. Comparative Example 1 shows that when the hydrogen fluoride inhibitor is greater than 20%, the inhibitory effect on hydrogen fluoride is significantly reduced. Comparative Example 2 shows that when the hydrogen fluoride inhibitor is less than 2%, the inhibitory effect on hydrogen fluoride is not obvious.

Claims

1. A method for reducing the amount of hydrogen fluoride generated during the fire process of fluorine-containing fire extinguishing agents, characterized in that, Fire extinguishing is performed using a composition comprising a perfluoroketone compound and a hydrogen fluoride inhibitor, wherein the hydrogen fluoride inhibitor is selected from at least one of phosphorus nitrogen compounds, fluorosulfate compounds, and fluorosulfonamide compounds.

2. The method for reducing the amount of hydrogen fluoride generated during the fire process of fluorine-containing fire extinguishing agents according to claim 1, characterized in that, The perfluoroketone compound is selected from at least one of perfluoropentanone, perfluorohexanone, and perfluoroheptanone.

3. The method for reducing the amount of hydrogen fluoride generated during the fire process of fluorine-containing fire extinguishing agents according to claim 1, characterized in that, The amount of the hydrogen fluoride inhibitor in the composition is not more than 20% by mass.

4. The method for reducing the amount of hydrogen fluoride generated during the fire process of fluorine-containing fire extinguishing agents according to claim 3, characterized in that, The amount of the hydrogen fluoride inhibitor in the composition is 2% to 20% by mass.

5. The method for reducing the amount of hydrogen fluoride generated during the fire process of fluorine-containing fire extinguishing agents according to claim 1, characterized in that, The perfluoroketone compound constitutes 80% to 98% of the composition by mass.

6. The method for reducing the amount of hydrogen fluoride generated during the fire process of fluorine-containing fire extinguishing agents according to claim 1, characterized in that, The hydrogen fluoride inhibitor is selected from at least one of phosphorus nitrogen compounds and fluorosulfonyl diamine compounds.

7. The method for reducing the amount of hydrogen fluoride generated during the fire process of fluorine-containing fire extinguishing agents according to claim 1, characterized in that, The phosphorus and nitrogen compounds are selected from at least one of hexachlorocyclotriphosphazene, hexafluorocyclotriphosphazene, pentafluoromonochlorocyclotriphosphazene, tetrafluorodichlorocyclotriphosphazene, ethoxypentafluorocyclotriphosphazene, trifluoroethoxypentafluorocyclotriphosphazene, or pentafluorophenoxycyclotriphosphazene.

8. The method for reducing the amount of hydrogen fluoride generated during the fire process of fluorine-containing fire extinguishing agents according to claim 1, characterized in that, The fluorosulfate compound is selected from at least one of hexafluoroisopropyl fluorosulfate, trifluoroethyl fluorosulfate, perfluoroisobutyl fluorosulfate, or perfluoron-butyl fluorosulfate.

9. The method for reducing the amount of hydrogen fluoride generated during the fire process of fluorine-containing fire extinguishing agents according to claim 1, characterized in that, The fluorosulfonyl diamine compound is selected from at least one of bis(trifluoromethyl)sulfonyl diamine, trifluoromethyl(hexafluoroisopropyl)sulfonyl diamine, or bis(hexafluoroisopropyl)sulfonyl diamine.

10. The method for reducing the amount of hydrogen fluoride generated during the fire process of fluorine-containing fire extinguishing agents according to any one of claims 6-9, characterized in that, The hydrogen fluoride inhibitor is selected from at least one of hexachlorocyclotriphosphazene, hexafluorocyclotriphosphazene, ethoxypentafluorocyclotriphosphazene, bis(trifluoromethyl)sulfonamide, and bis(hexafluoroisopropyl)sulfonamide.

11. A fire extinguishing composition for reducing the amount of HF generated during the fire process of fluorine-containing fire extinguishing agents, characterized in that: The composition is any one of the compositions according to claims 1-10 that contains a perfluoroketone compound and a hydrogen fluoride inhibitor.

12. A fire extinguishing system, characterized in that, The fire extinguishing system described herein uses the composition of claim 11, which comprises a perfluoroketone compound and a hydrogen fluoride inhibitor.

13. The fire extinguishing system according to claim 12, characterized in that, The fire suppression system is selected from total flooding fire suppression systems.