Foam extinguishing agent composition, application thereof and submerged jet extinguishing method

Abstract

The invention relates to the technical field of fixed top storage tank submerged jet fire extinguishing, and discloses a foam extinguishing agent composition, application thereof and a submerged jet fire extinguishing method. The foam extinguishing agent composition comprises a component A and a component B, the component A and the component B are independently stored, and the component A contains a polyhydroxy polymer, a fluorocarbon surfactant, a hydrocarbon surfactant, an anti-solvent, an anti-freezing agent and an optional preservative; and the component B contains a cross-linking agent. The foam extinguishing agent composition is high in stability and good in solubility resistance, can be applied to fire fighting of water-soluble and water-insoluble fixed top storage tanks at the same time, and also has excellent fire extinguishing performance and burning resistance.

Description

Technical Field

[0001] The invention relates to the technical field of underwater jetting fire extinguishing in fixed-roof storage tanks, and in particular to a foam fire extinguishing agent composition and application thereof, and an underwater jetting fire extinguishing method. Background Art

[0002] When extinguishing fires in large storage tanks, the underwater injection system has the following advantages over the currently commonly used above-the-liquid injection system: (1) The amount of foam liquid lost is small. The foam liquid passes through the oil layer from the bottom of the tank to the burning oil surface to extinguish the fire. It does not need to pass through the flame to enter the oil surface, which greatly reduces the destructive effects of thermal radiation and hot air flow on the foam and effectively improves the utilization rate of the foam liquid; (2) The foam system is basically not damaged by the explosion in the tank and can play a normal fire extinguishing role in most cases; (3) The foam liquid passes through the oil layer from the bottom of the tank and can bring the low-temperature oil at the bottom of the tank to the burning oil surface at the top. By continuously stirring the oil layer, the oil surface is cooled down, which to a certain extent weakens the volatilization of oil and gas on the oil surface and inhibits combustion.

[0003] According to the technical standards for foam fire extinguishing systems, submerged spray systems cannot be used for fixed-roof storage tanks for water-soluble Class A, B, and C liquids. This is because the foam fire extinguishing agents used in existing submerged spray systems are mostly water-based fire extinguishing agents such as protein foam and fluoroprotein foam. When passing through water-soluble liquids or destructive liquids from the bottom of the tank, they will lose their foam structure, greatly reducing the fire extinguishing effect. For non-water-soluble liquids, although existing foam fire extinguishing agents will not dissolve with them, they often have problems with foam rupture when passing through the liquid surface due to low foam stability, thus affecting the fire extinguishing effect. Therefore, improving the foam stability and solubility resistance of the fire extinguishing agent is the key to improving the fire extinguishing ability of the submerged foam fire extinguishing system. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem that the existing foam fire extinguishing agent is easily soluble in water-soluble liquids, resulting in the fire extinguishing agent losing its foam structure, or the existing foam fire extinguishing agent has low foam stability in non-water-soluble liquids and the foam is easy to break when passing through the liquid surface. A foam fire extinguishing agent composition and its application and an underwater spray fire extinguishing method are provided. The foam fire extinguishing agent composition has high stability and good solubility resistance. It can not only be used for extinguishing water-soluble and non-water-soluble fixed-roof storage tank fires at the same time, but also has excellent fire extinguishing performance and burning resistance.

[0005] In order to achieve the above-mentioned object, the present invention provides a foam fire extinguishing agent composition on one hand, which comprises component A and component B, wherein component A and component B are stored separately, wherein component A contains a polyhydroxy polymer, a fluorocarbon surfactant, a hydrocarbon surfactant, an antisolvent, an antifreeze agent and an optional preservative; and component B contains a cross-linking agent.

[0006] Preferably, the foam fire extinguishing agent composition further contains water.

[0007] Preferably, based on the total weight of the foam fire extinguishing agent composition, the polyhydroxy polymer is 1-5% by weight, the cross-linking agent is 1-4% by weight, the fluorocarbon surfactant is 3-8% by weight, the hydrocarbon surfactant is 5-15% by weight, the antisolvent is 0.02-1% by weight, the antifreeze agent is 5-15% by weight, the preservative is 0-0.5% by weight, and water is 51.5-84.98% by weight.

[0008] Preferably, the polyhydroxy polymer is polyvinyl alcohol.

[0009] Preferably, the fluorocarbon surfactant has 3-6 carbon atoms.

[0010] Preferably, the fluorocarbon surfactant is a perfluorobutyl surfactant.

[0011] Preferably, the perfluorobutyl surfactant is selected from one or more of N'-3-(dimethyl)-propyl-(N-perfluorobutylsulfonyl-N-octylsulfonyl)-imidecarboxylic acid type betaine, N'-3-(dimethyl)-propyl-(N-perfluorobutylsulfonyl-N-octylsulfonyl)-amine oxide, N-aminoethyl perfluorobutylsulfonamide and N'-3-(dimethyl)-propyl-(N-perfluorohexylsulfonyl)-imidecarboxylic acid type betaine.

[0012] Preferably, the hydrocarbon surfactant is sodium lauryl sulfate and / or cocamidopropyl betaine.

[0013] Preferably, the hydrocarbon surfactant is sodium lauryl sulfate and cocamidopropyl betaine, and the weight ratio of sodium lauryl sulfate to cocamidopropyl betaine is 1-2:1.

[0014] Preferably, the antisolvent is selected from one or more of xanthan gum, sodium alginate and carboxymethyl cellulose.

[0015] Preferably, the antifreeze agent is sodium chloride and urea, and the weight ratio of sodium chloride to urea is 0.5-2:1, preferably 0.5-1.5:1.

[0016] Preferably, the crosslinking agent is an organic boron crosslinking agent.

[0017] Preferably, the method for preparing the organic boron crosslinking agent comprises: a first reaction of a boron compound, a base and water, and then a second reaction of the boron compound, a base and water with a polyhydroxy organic ligand, an organic solvent and optionally water.

[0018] Preferably, the weight ratio of the boron compound, the base, the polyhydroxy organic ligand and the organic solvent is 1.5-12:1:3.75-25:8.75-45, preferably 1.5-12:1:3.75-25:8.75-45.

[0019] Preferably, the conditions of the first reaction include: temperature of 55-65° C. and time of 20-50 min.

[0020] Preferably, the conditions of the second reaction include: temperature of 65-75° C. and time of 3-6 h.

[0021] Preferably, the polyhydroxy organic ligand is selected from one or more of sodium gluconate, glycerol and xylitol.

[0022] Preferably, the boron compound is sodium tetraborate.

[0023] Preferably, the base is sodium hydroxide.

[0024] Preferably, the organic solvent is glycerol.

[0025] Preferably, the preservative is sodium benzoate.

[0026] A second aspect of the present invention provides a use of the foam fire extinguishing agent composition described above in underwater spraying fire extinguishing.

[0027] The third aspect of the present invention provides a method for underwater jet fire extinguishing, which is implemented using the foam fire extinguishing agent composition described above, and the method comprises the following steps:

[0028] (1) mixing the component A described above with water to obtain a solution A;

[0029] (2) mixing the component B described above with water to obtain a B solution;

[0030] (3) Mix solution A and solution B, generate foam, and then let foam enter the tank from the bottom to extinguish the fire.

[0031] Preferably, the weight ratio of the water in step (1) to the water in step (2) is 2-4.5:1, preferably 3-4:1.

[0032] Compared with the prior art, the present invention has at least the following advantages:

[0033] (1) The foam fire extinguishing agent composition of the present invention contains a polyhydroxy polymer, which can make the foam fire extinguishing agent exist stably in the non-water-soluble liquid without breaking, thereby improving the foam stability, thereby improving the fire extinguishing performance and anti-burning performance of the foam fire extinguishing agent;

[0034] (2) The foam fire extinguishing agent composition of the present invention contains both a fluorocarbon surfactant and an antisolvent, which can make the foam fire extinguishing agent insoluble in a water-soluble liquid, thereby improving the antisolubility and stability of the foam fire extinguishing agent, thereby improving the fire extinguishing performance and anti-burning performance of the foam fire extinguishing agent.

[0035] (3) The foam fire extinguishing agent composition of the present invention contains an antifreeze agent, which can reduce the freezing point of the foam fire extinguishing agent, so that the foam fire extinguishing agent can be used at low temperatures; at the same time, the addition of the antifreeze agent can delay the cross-linking speed of the polyhydroxy polymer, and can prevent the polyhydroxy polymer from cross-linking before reaching the liquid surface of the storage tank without additionally adjusting the pH value of the system, thereby blocking the pipeline or failing to spread completely on the liquid surface, thereby improving the fire extinguishing performance and anti-burning performance of the foam fire extinguishing agent.

[0036] (4) The foam fire extinguishing agent composition of the present invention has high foam stability, is not easy to break, has good oleophobicity, and has stronger water retention performance through the synergistic effect of various components. Therefore, when used in underwater jet fire extinguishing scenes, it can play a longer isolation, cooling and suffocation role, thereby having higher fire extinguishing efficiency and less usage; it can be used for both water-soluble and water-insoluble A, B, and C liquids. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 The invention relates to an underwater jet fire extinguishing system.

[0038] Description of Reference Numerals

[0039] 1 air compressor; 2 electric pump; 3A liquid tank; 4B liquid tank; 5 static mixer; 6 oil tank; 7 pipeline; 8 liquid outlet; 9 first valve; 10 second valve; 11 check valve; 12 bracket; 13 liquid discharge port. DETAILED DESCRIPTION

[0040] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0041] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0042] A first aspect of the present invention provides a foam fire extinguishing agent composition, which comprises component A and component B, wherein component A and component B are stored separately, wherein component A contains a polyhydroxy polymer, a fluorocarbon surfactant, a hydrocarbon surfactant, an antisolvent, an antifreeze agent and an optional preservative; and component B contains a crosslinking agent.

[0043] The foam fire extinguishing agent composition of the present invention has high foam stability, is not easy to break, has good oleophobicity, and has stronger water retention performance through the synergistic effect of various components. Therefore, when applied to underwater spray fire extinguishing scenes, it can play a longer isolation, cooling and suffocation role, thereby having higher fire extinguishing efficiency and less usage; and can simultaneously perform underwater spray system fire extinguishing on water-soluble and water-insoluble A, B, and C class liquid fires.

[0044] In a specific embodiment, the fire extinguishing foam composition further contains water.

[0045] In a preferred embodiment, based on the total weight of the foam fire extinguishing agent composition, the polyhydroxy polymer is 1-5% by weight, the cross-linking agent is 1-4% by weight, the fluorocarbon surfactant is 3-8% by weight, the hydrocarbon surfactant is 5-15% by weight, the antisolvent is 0.02-1% by weight, the antifreeze agent is 5-15% by weight, the preservative is 0-0.5% by weight, and water is 51.5-84.98% by weight.

[0046] Component A of the present invention contains a polyhydroxy polymer (gelling agent) capable of undergoing a cross-linking reaction. The presence of the polyhydroxy polymer can prevent the foam fire extinguishing agent from breaking in a non-water-soluble liquid, thereby improving the stability of the foam and having excellent fire extinguishing performance when applied to a non-water-soluble solution.

[0047] In a preferred embodiment, the polyhydroxy polymer is polyvinyl alcohol. Further preferably, the polyvinyl alcohol is at least one of PVA088-20, PVA088-35 and PVA100-27.

[0048] The component A of the present invention contains both fluorocarbon surfactant and antisolvent, which can make the foam fire extinguishing agent insoluble in water-soluble liquid, improve the antisolubility and stability of the foam fire extinguishing agent in water-soluble liquid, thereby improving the fire extinguishing performance and anti-burning performance of the foam fire extinguishing agent. At the same time, the fire extinguishing agent of the present invention uses fluorocarbon surfactant, which has high environmental protection and low dosage under the premise of ensuring the oleophobic performance and fire extinguishing anti-burning performance of the fire extinguishing agent.

[0049] In some embodiments, the fluorocarbon surfactant can be a short-chain fluorocarbon surfactant, preferably a fluorocarbon surfactant with a carbon number of 3-6, specifically, for example, a fluorocarbon surfactant with a carbon number of 3, a fluorocarbon surfactant with a carbon number of 4, a fluorocarbon surfactant with a carbon number of 5, or a fluorocarbon surfactant with a carbon number of 6.

[0050] In a preferred embodiment, the fluorocarbon surfactant is a perfluorobutyl surfactant. In a further preferred embodiment, the perfluorobutyl surfactant is selected from one or more of N'-3-(dimethyl)-propyl-(N-perfluorobutylsulfonyl-N-octylsulfonyl)-imide carboxylic acid type betaine, N'-3-(dimethyl)-propyl-(N-perfluorobutylsulfonyl-N-octylsulfonyl)-amine oxide, N-aminoethyl perfluorobutylsulfonamide and N'-3-(dimethyl)-propyl-(N-perfluorohexylsulfonyl)-imide carboxylic acid type betaine.

[0051] In some preferred embodiments, the antisolvent is selected from one or more of xanthan gum, sodium alginate and carboxymethyl cellulose, preferably xanthan gum.

[0052] In the present invention, the component A contains a fluorocarbon surfactant and a hydrocarbon surfactant, which can effectively reduce the interfacial tension between the foam liquid and the flammable liquid, promote the complete spreading of the foam liquid on the surface of the flammable liquid, and thus improve the fire extinguishing performance of the foam fire extinguishing agent.

[0053] In some embodiments, the hydrocarbon surfactant may be a conventional choice in the art. Specifically, the hydrocarbon surfactant is sodium lauryl sulfate and / or cocamidopropyl betaine.

[0054] In a preferred embodiment, the hydrocarbon surfactant is sodium lauryl sulfate and cocamidopropyl betaine, and the weight ratio of sodium lauryl sulfate to cocamidopropyl betaine is 1-2:1.

[0055] In the present invention, if component A and component B are crosslinked immediately after mixing or the crosslinking time is short, gel may have formed on the pipeline, blocking the pipeline or failing to completely spread on the liquid surface, thereby reducing the fire extinguishing performance. The present invention can not only reduce the freezing point of the fire extinguishing agent by adding an antifreeze agent, but also delay the crosslinking speed of component A and component B, thereby eliminating the need to delay the crosslinking speed by additionally adjusting the pH value of the system.

[0056] In some embodiments, the antifreeze agent can be a conventional choice in the art, such as polyethylene glycol, etc. In a specific embodiment, the antifreeze agent is sodium chloride and urea, and the weight ratio of sodium chloride to urea is 0.5-2:1, preferably 0.5-1.5:1. The inventors found that when the antifreeze agent is a combination of sodium chloride and urea, the fire extinguishing performance is significantly improved.

[0057] In the present invention, component B containing a cross-linking agent needs to be stored separately from component A to prevent premature cross-linking. When fire extinguishing is required, component B and component A are mixed and foamed for use.

[0058] In some embodiments, the cross-linking agent may be a conventional choice in the art, and specifically, the cross-linking agent is an organic boron cross-linking agent.

[0059] Preferably, the organic boron crosslinking agent prepared by the method provided by the present invention is used in combination with a polyhydroxy polymer to improve the underwater injection fire extinguishing performance of the foam fire extinguishing agent. Specifically, the preparation method of the organic boron crosslinking agent comprises: a first reaction of a boron compound, a base and water, and then a second reaction with a polyhydroxy organic ligand, an organic solvent and optionally water.

[0060] In the preparation method of the organic boron crosslinking agent of the present invention, there is no particular requirement for the amount of water added, as long as the boron compound and the base can form a solution. After the product obtained by the first reaction is mixed with the polyhydroxy organic ligand and the organic solvent, it can be selected whether to add water according to the specific situation.

[0061] In a preferred embodiment, the weight ratio of the boron compound, the base, the polyhydroxy organic ligand and the organic solvent is 1.5-12:1:3.75-25:8.75-45, more preferably 2-8:1:5-15:10-30.

[0062] In a further preferred embodiment, the weight ratio of the boron compound, the base, the polyhydroxy organic ligand, the organic solvent and water is 2-8:1:5-15:10-30:10-20.

[0063] Preferably, the temperature of the first reaction is 55-65°C, and the time of the first reaction is 20-50 min. Preferably, the temperature of the second reaction is 65-75°C, and the time of the second reaction is 3-6 h.

[0064] In the method for preparing the organic boron cross-linking agent of the present invention, the polyhydroxy organic ligand can be selected from one or more of sodium gluconate, glycerol and xylitol, preferably sodium gluconate.

[0065] In the method for preparing the organic boron crosslinking agent of the present invention, the boron compound may be sodium tetraborate.

[0066] In the method for preparing the organic boron crosslinking agent of the present invention, the base may be sodium hydroxide.

[0067] In the method for preparing the organoboron crosslinking agent of the present invention, the organic solvent may be glycerol.

[0068] In a more preferred embodiment, the preparation method of the organic boron crosslinker comprises: stirring the boron compound, base and water at 55-65°C and a rotation speed of 150-300r / min for 20-50min, and then adding a polyhydroxy organic ligand, an organic solvent and optional water to react at 65-75°C for 3-6h.

[0069] In a further preferred embodiment, the preparation method of the organic boron crosslinker comprises: stirring sodium tetraborate, sodium hydroxide and water at 55-65°C and a rotation speed of 150-300r / min for 20-50min, and then adding sodium gluconate, glycerol and optional water for reaction at 65-75°C for 3-6h.

[0070] In the present invention, the preservative can be a conventional choice in the art. Preferably, the preservative is sodium benzoate.

[0071] A second aspect of the present invention provides a use of the foam fire extinguishing agent composition described above in underwater spraying fire extinguishing.

[0072] In a preferred embodiment, the foam fire extinguishing agent composition can be used for underwater spraying to extinguish water-soluble and water-insoluble Class A, B, and C ignition liquids in fixed-roof storage tanks.

[0073] The third aspect of the present invention provides a method for underwater jet fire extinguishing, which is implemented using the foam fire extinguishing agent composition described above, and the method comprises the following steps:

[0074] (1) mixing the component A described above with water to obtain a solution A;

[0075] (2) mixing the component B described above with water to obtain a B solution;

[0076] (3) Mix solution A and solution B, generate foam, and then let foam enter the tank from the bottom to extinguish the fire.

[0077] In a specific embodiment, step (1) specifically includes: 1) heating and stirring to dissolve polyvinyl alcohol in water to obtain a polyvinyl alcohol solution; 2) adding a short-chain fluorocarbon surfactant, a hydrocarbon surfactant, an antisolvent, an antifreeze agent and a preservative to the polyvinyl alcohol solution, stirring and dissolving evenly to obtain a component A solution.

[0078] In the underwater spray fire extinguishing method, the components of component A and component B are first prepared into solution A and solution B respectively according to the proportions described above, and then solution A and solution B are mixed and foamed, and then enter the storage tank from the bottom of the water-soluble storage tank or the non-water-soluble storage tank and spread to the liquid surface, and then become a gel foam state for fire extinguishing.

[0079] In some embodiments, the weight ratio of the water in step (1) to the water in step (2) is 2-4.5:1, for example, 2:1, 2.2:1, 2.5:1, 2.8:1, 3:1, 3.2:1, 3.5:1, 3.8:1 or 4:1, preferably 3-4:1.

[0080] Furthermore, in order to implement the underwater jet fire extinguishing method and test the underwater jet fire extinguishing performance of the foam fire extinguishing agent, the present invention provides an underwater jet fire extinguishing system.

[0081] like Figure 1 As shown, the underwater jet fire extinguishing system includes an air compressor 1, an electric pump 2, an A liquid tank 3, a B liquid tank 4, a static mixer 5, an oil tank 6 and a foam outlet pipe 7, wherein the A liquid tank 3 and the B liquid tank 4 are both connected to one end of the static mixer 5, the other end of the static mixer 5 is connected to the starting end of the foam outlet pipe 7 and the foam outlet pipe 7 passes through the bottom of the oil tank 6 and enters the inner cavity of the oil tank 6, and the end of the foam outlet pipe 7 located in the inner cavity of the oil tank 6 has a liquid outlet 8.

[0082] In a specific embodiment, Figure 1 As shown, the air compressor 1 is used to deliver the A solution in the A liquid tank 3 into the static mixer 5 and provide gas for foaming the solution.

[0083] In a specific embodiment, Figure 1 As shown, the electric pump 2 is used to pump the B solution in the B liquid tank 4 into the static mixer 5 .

[0084] In a preferred embodiment, the A liquid tank 3 is connected to the static mixer 5 through a first pipeline, and a first valve 9 is provided on one end of the first pipeline close to the A liquid tank 3 for controlling the outflow of the A solution in the A liquid tank 3 .

[0085] In a preferred embodiment, the B liquid tank 4 is connected to the static mixer 5 through a second pipeline, and a second valve 10 is provided on one end of the second pipeline close to the B liquid tank 4 for controlling the outflow of the B solution in the B liquid tank 4 .

[0086] In a preferred embodiment, a check valve 11 is provided on the foam liquid outlet pipe 7 between the static mixer 5 and the bottom of the oil tank 6 to prevent the liquid entering the inner cavity of the oil tank 6 from the static mixer 5 from flowing back into the static mixer 5 .

[0087] In specific operations, the A solution from the A liquid tank 3 and the B solution from the B liquid tank 4 are mixed and foamed in the static mixer 5, and the obtained foam fire extinguishing agent enters the oil tank 6 through the foam outlet pipe 7, and is sprayed into the liquid in the oil tank 6 through the liquid outlet 8. The foam fire extinguishing agent moves upward in the liquid to the liquid surface to extinguish the fire.

[0088] Furthermore, if Figure 1 As shown, the underwater jet fire extinguishing system further includes a bracket, and the bracket is used to place the oil tank 6. In a specific embodiment, whether the bracket 12 is needed can be selected according to the design and actual needs of the underwater jet fire extinguishing system.

[0089] In a more specific embodiment, the bottom of the oil tank 6 has a drain port 13 for draining the liquid in the oil tank 6 .

[0090] The present invention will be described in detail below through examples, but the protection scope of the present invention is not limited thereto. In the following examples and comparative examples, unless otherwise specified, the raw materials used are common commercial products.

[0091] Example 1

[0092] In this embodiment, the contents of each component are as follows by weight percentage: 1% polyhydroxy polymer, 1% crosslinking agent, 3% fluorocarbon surfactant, 5% hydrocarbon surfactant, 0.02% antisolvent, 5% antifreeze agent, 0.1% preservative, and 84.88% water. The polyhydroxy polymer is polyvinyl alcohol 088-20 (model PVA088-20, alcoholysis degree 87%-89%), the crosslinking agent is an organic boron crosslinking agent, the fluorocarbon surfactant is N'-3-(dimethyl)-propyl-(N-perfluorobutylsulfonyl-N-octylsulfonyl)-imide carboxylic acid type betaine, the hydrocarbon surfactant is sodium lauryl sulfate and cocamidopropyl betaine (the weight ratio of the two is 1:1), the antisolvent is xanthan gum, the antifreeze agent is sodium chloride and urea (the weight ratio of the two is 0.5:1), and the preservative is sodium benzoate.

[0093] The preparation method of solution A is as follows: water and polyvinyl alcohol 088-20 are mixed, and the polyvinyl alcohol is dissolved by heating and stirring at 80°C and 60 r / min for 1 hour. After the solution is cooled, xanthan gum is added in small amounts and multiple times under stirring. After xanthan gum is completely dissolved, N'-3-(dimethyl)-propyl-(N-perfluorobutylsulfonyl-N-octylsulfonyl)-iminocarboxylic acid type betaine, sodium dodecyl sulfate, cocamidopropyl betaine, sodium chloride and urea are added to obtain solution A.

[0094] The preparation method of the organic boron crosslinking agent is as follows: sodium tetraborate, sodium hydroxide and part of water are stirred and reacted at 55° C. and a rotation speed of 200 r / min for 30 minutes, and then sodium gluconate, glycerol and the remaining part of water are added and reacted at 65° C. and a rotation speed of 200 r / min for 4 hours to obtain the organic boron crosslinking agent, wherein the weight ratio of sodium tetraborate, sodium hydroxide, sodium gluconate, glycerol and water (the sum of part of the water and the remaining water) is 6:1:15:35:43.

[0095] The preparation method of solution B is as follows: the organic boron cross-linking agent is fully mixed with water to obtain solution B.

[0096] The weight ratio of water used in the preparation process of solution A and the preparation process of solution B is 3:1.

[0097] Example 2

[0098] In this embodiment, the contents of each component are as follows by weight percentage: 3% polyhydroxy polymer, 2.5% crosslinking agent, 5.5% fluorocarbon surfactant, 10% hydrocarbon surfactant, 0.05% antisolvent, 10% antifreeze agent, 0.3% preservative, and 68.65% water. The polyhydroxy polymer is polyvinyl alcohol 088-20 (model PVA088-20, alcoholysis degree 87%-89%), the crosslinking agent is an organic boron crosslinking agent, the fluorocarbon surfactant is N'-3-(dimethyl)-propyl-(N-perfluorobutylsulfonyl-N-octylsulfonyl)-amine oxide, the hydrocarbon surfactant is sodium lauryl sulfate and cocamidopropyl betaine (the weight ratio of the two is 1.5:1), the antisolvent is xanthan gum, the antifreeze agent is sodium chloride and urea (the weight ratio of the two is 1:1), and the preservative is sodium benzoate.

[0099] The preparation method of solution A is the same as that of Example 1.

[0100] The preparation method of the organic boron crosslinking agent is as follows: sodium tetraborate, sodium hydroxide and part of water are stirred and reacted at 60° C. and a rotation speed of 200 r / min for 30 minutes, and then sodium gluconate, glycerol and the remaining part of water are added and reacted at 70° C. and a rotation speed of 200 r / min for 4 hours to obtain the organic boron crosslinking agent, wherein the weight ratio of sodium tetraborate, sodium hydroxide, sodium gluconate, glycerol and water (the sum of part of the water and the remaining water) is 3.6:1:8:16:11.4.

[0101] The preparation method of solution B is as follows: the organic boron cross-linking agent is fully mixed with water to obtain solution B.

[0102] The weight ratio of water used in the preparation process of solution A and the preparation process of solution B is 3.5:1.

[0103] Example 3

[0104] In this embodiment, the contents of each component are as follows by weight percentage: 5% polyhydroxy polymer, 4% crosslinking agent, 8% fluorocarbon surfactant, 15% hydrocarbon surfactant, 1% antisolvent, 15% antifreeze agent, 0.5% preservative, and 51.5% water. The polyhydroxy polymer is polyvinyl alcohol 088-20 (alcoholysis degree 87%-89%), the crosslinking agent is an organic boron crosslinking agent, the fluorocarbon surfactant is N-aminoethyl perfluorobutyl sulfonamide and N'-3-(dimethyl)-propyl-(N-perfluorohexyl sulfonyl)-imide carboxylic acid type betaine, the hydrocarbon surfactant is sodium lauryl sulfate and cocamidopropyl betaine (the weight ratio of the two is 2:1), the antisolvent is xanthan gum, the antifreeze agent is sodium chloride and urea (the weight ratio of the two is 1.5:1), and the preservative is sodium benzoate.

[0105] The preparation method of solution A is the same as that of Example 1.

[0106] The preparation method of the organic boron crosslinking agent is as follows: sodium tetraborate, sodium hydroxide and part of water are stirred and reacted at 60° C. and a rotation speed of 200 r / min for 30 minutes, and then sodium gluconate, glycerol and the remaining part of water are added and reacted at 70° C. and a rotation speed of 200 r / min for 4 hours to obtain the organic boron crosslinking agent, wherein the weight ratio of sodium tetraborate, sodium hydroxide, sodium gluconate, glycerol and water (the sum of part of the water and the remaining water) is 3.6:1:8:16:11.4.

[0107] The preparation method of solution B is as follows: the organic boron cross-linking agent is fully mixed with water to obtain solution B.

[0108] The weight ratio of water used in the preparation process of solution A and the preparation process of solution B is 4:1.

[0109] Example 4

[0110] The method of Example 2 was followed, except that the antifreeze agent (sodium chloride and urea) was replaced with an equal amount of diammonium phosphate. Compared with Example 2, the antifreeze performance of the fire extinguishing agent was reduced and the cross-linking time was shortened.

[0111] Example 5

[0112] The method of Example 2 was followed, except that the organic boron crosslinking agent was replaced with a commercially available organic boron crosslinking agent (model HKJ-106) purchased from Hengju Technology.

[0113] Example 6

[0114] The method of Example 2 was followed, except that the anti-solvent xanthan gum was replaced by sodium alginate.

[0115] The specific operations are:

[0116] In this embodiment, the contents of each component are as follows by weight percentage: 3% polyhydroxy polymer, 2.5% crosslinking agent, 5.5% fluorocarbon surfactant, 10% hydrocarbon surfactant, 0.05% antisolvent, 10% antifreeze agent, 0.3% preservative, and 68.65% water. The polyhydroxy polymer is polyvinyl alcohol 088-20 (model PVA088-20, alcoholysis degree 87%-89%), the crosslinking agent is an organic boron crosslinking agent, the fluorocarbon surfactant is N'-3-(dimethyl)-propyl-(N-perfluorobutylsulfonyl-N-octylsulfonyl)-amine oxide, the hydrocarbon surfactant is sodium lauryl sulfate and cocamidopropyl betaine (the weight ratio of the two is 1.5:1), the antisolvent is sodium alginate, the antifreeze agent is sodium chloride and urea (the weight ratio of the two is 1:1), and the preservative is sodium benzoate.

[0117] The preparation method of solution A is as follows: water and polyvinyl alcohol 088-20 are mixed, and the polyvinyl alcohol is dissolved by heating and stirring at 80° C. and 60 r / min for 1 hour. After the solution is cooled, sodium alginate is added in small amounts and multiple times under stirring. After the sodium alginate is completely dissolved, N'-3-(dimethyl)-propyl-(N-perfluorobutylsulfonyl-N-octylsulfonyl)-imidecarboxylic acid type betaine, sodium dodecyl sulfate, cocamidopropyl betaine, sodium chloride and urea are added to obtain solution A.

[0118] The preparation method of the organic boron crosslinking agent is as follows: sodium tetraborate, sodium hydroxide and part of water are stirred and reacted at 60° C. and a rotation speed of 200 r / min for 30 minutes, and then sodium gluconate, glycerol and the remaining part of water are added and reacted at 70° C. and a rotation speed of 200 r / min for 4 hours to obtain the organic boron crosslinking agent, wherein the weight ratio of sodium tetraborate, sodium hydroxide, sodium gluconate, glycerol and water (the sum of part of the water and the remaining water) is 3.6:1:8:16:11.4.

[0119] The preparation method of solution B is as follows: the organic boron cross-linking agent is fully mixed with water to obtain solution B.

[0120] The weight ratio of water used in the preparation process of solution A and the preparation process of solution B is 3.5:1.

[0121] Example 7

[0122] The method of Example 2 was followed, except that the polyhydroxy organic ligand sodium gluconate in the cross-linking agent was replaced with glycerol and xylitol, and the weight ratio of glycerol to xylitol was 1:1.

[0123] Example 8

[0124] The method of Example 2 is followed, except that the polyhydroxy polymer polyvinyl alcohol 088-20 is replaced by polyvinyl alcohol 100-27 (model PVA100-27).

[0125] Example 9

[0126] The method of Example 2 was followed, except that the weight ratio of water used in the preparation of solution A and solution B was 2.5:1. Compared with Example 2, the viscosity of component A solution was higher, and the mixing and foaming of solution A and solution B was uneven.

[0127] Example 10

[0128] The method of Example 2 was followed, except that the weight ratio of sodium chloride to urea was 2: 1. Compared with Example 2, the crosslinking time after the A and B solutions were mixed was shortened.

[0129] Comparative Example 1

[0130] The method of Example 2 was followed, except that the polyhydroxy polymer (polyvinyl alcohol 088-20) was replaced by 0.5% hydroxypropyl guar gum.

[0131] Comparative Example 2

[0132] The method of Example 2 was followed, except that the polyhydroxy polymer (polyvinyl alcohol 088-20) and the crosslinking agent (organoboron crosslinking agent) were not added.

[0133] Comparative Example 3

[0134] The method of Example 2 was followed, except that no fluorocarbon surfactant was added, and all fluorocarbon surfactants were replaced with an equal amount of sodium dodecyl sulfate.

[0135] Comparative Example 4

[0136] Fluoroprotein foam fire extinguishing agent purchased from Jiangsu Jiangya was used and configured into foam liquid according to its fire extinguishing agent specifications.

[0137] Test Case

[0138] The fire extinguishing agents in the examples and comparative examples were tested for foaming multiple, 25% liquid separation time and fire extinguishing performance.

[0139] 1. Foaming multiple determination: Connect a 5L / min foam gun to the static mixer of the foam generating device, start the air compressor, and adjust the foam gun inlet pressure to 0.7Mpa. According to the foam fire extinguishing agent standard GB15308, the foaming multiple and liquid separation time are determined. The results are shown in Table 1.

[0140] 2. Fire extinguishing performance test: Since there is currently no evaluation test standard or corresponding standard or small-scale model for the submerged spray system fire extinguishing agent that can effectively evaluate the actual fire extinguishing performance of the foam fire extinguishing agent against oil tank fires, and the actual oil tank fire test requires a large amount of test fuel, the present invention also provides the following Figure 1 The underwater jet fire extinguishing system shown in the figure is subjected to the evaluation test of the underwater jet fire extinguishing agent. For Examples 1-10 and Comparative Examples 1-3, the A solution is placed in the tank, and the B solution is added to the B tank; for Comparative Example 4, the fluoroprotein foam liquid is added to the A tank 3. A 400mm high water cushion layer and a 250mm high oil layer are added to the oil tank, and 120# solvent oil is used as the test oil. The oil tank is pre-burned for 1 minute, and the foam supply strength is 3L / (min·m 2 ), the fire extinguishing time of each embodiment and comparative example is shown in Table 1.

[0141] Table 1

[0142]

[0143]

[0144] It can be seen from the results in Table 1 that the fire extinguishing agent prepared in the embodiment has a short fire extinguishing time, a long liquid separation time, a foaming multiple of about 8, and good performance. Compared with the existing foam fire extinguishing agent, the foam has high stability, is not easy to break, has good oleophobicity, and has stronger water retention performance. Therefore, when applied to underwater jet fire extinguishing scenes, it can play a longer isolation, cooling and suffocation effect, so it has a higher fire extinguishing efficiency and less dosage. In addition, the fire extinguishing agent of the present invention uses a short-chain fluorocarbon surfactant and is used in a low amount. On the premise of ensuring the oleophobicity and fire extinguishing and burning resistance of the fire extinguishing agent, it has high environmental protection.

[0145] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A foam fire extinguishing agent composition, characterized in that: The foam fire extinguishing agent composition comprises component A and component B, wherein component A and component B are stored independently. The component A contains a polyhydroxy polymer, a fluorocarbon surfactant, a hydrocarbon surfactant, an antisolvent, an antifreeze agent and an optional preservative; The component B contains a crosslinking agent. 2 . The foam fire extinguishing agent composition according to claim 1 , further comprising water.

3. The foam fire extinguishing agent composition according to claim 2, characterized in that: Based on the total weight of the foam fire extinguishing agent composition, the polyhydroxy polymer is 1-5% by weight, the cross-linking agent is 1-4% by weight, the fluorocarbon surfactant is 3-8% by weight, the hydrocarbon surfactant is 5-15% by weight, the antisolvent is 0.02-1% by weight, the antifreeze agent is 5-15% by weight, the preservative is 0-0.5% by weight, and water is 51.5-84.98% by weight.

4. The foam fire extinguishing agent composition according to any one of claims 1 to 3, characterized in that: The polyhydroxy polymer is polyvinyl alcohol.

5. The foam fire extinguishing agent composition according to any one of claims 1 to 4, characterized in that: The fluorocarbon surfactant has 3 to 6 carbon atoms; Preferably, the fluorocarbon surfactant is a perfluorobutyl surfactant; Preferably, the perfluorobutyl surfactant is selected from one or more of N'-3-(dimethyl)-propyl-(N-perfluorobutylsulfonyl-N-octylsulfonyl)-imidecarboxylic acid type betaine, N'-3-(dimethyl)-propyl-(N-perfluorobutylsulfonyl-N-octylsulfonyl)-amine oxide, N-aminoethyl perfluorobutylsulfonamide and N'-3-(dimethyl)-propyl-(N-perfluorohexylsulfonyl)-imidecarboxylic acid type betaine.

6. The foam fire extinguishing agent composition according to any one of claims 1 to 5, characterized in that: The hydrocarbon surfactant is sodium lauryl sulfate and / or cocamidopropyl betaine; Preferably, the hydrocarbon surfactant is sodium lauryl sulfate and cocamidopropyl betaine, and the weight ratio of sodium lauryl sulfate to cocamidopropyl betaine is 1-2:

1.

7. The foam fire extinguishing agent composition according to any one of claims 1 to 6, characterized in that: The antisolvent is selected from one or more of xanthan gum, sodium alginate and carboxymethyl cellulose.

8. The foam fire extinguishing agent composition according to any one of claims 1 to 7, characterized in that: The antifreeze agent is sodium chloride and urea, and the weight ratio of sodium chloride to urea is 0.5-2:1, preferably 0.5-1.5:

1.

9. The foam fire extinguishing agent composition according to any one of claims 1 to 8, characterized in that: The crosslinking agent is an organic boron crosslinking agent.

10. The foam fire extinguishing agent composition according to claim 9, characterized in that: The method for preparing the organic boron crosslinking agent comprises: a first reaction of a boron compound, a base and water, and then a second reaction of the boron compound, a base and water with a polyhydroxy organic ligand, an organic solvent and optionally water; Preferably, the weight ratio of the boron compound, the base, the polyhydroxy organic ligand and the organic solvent is 1.5-12:1:3.75-25:8.75-45, preferably 1.5-12:1:3.75-25:8.75-45; Preferably, the conditions of the first reaction include: temperature of 55-65°C, time of 20-50min; Preferably, the conditions of the second reaction include: temperature of 65-75° C. and time of 3-6 h.

11. The foam fire extinguishing agent composition according to claim 10, characterized in that: The polyhydroxy organic ligand is selected from one or more of sodium gluconate, glycerol and xylitol; Preferably, the boron compound is sodium tetraborate; Preferably, the base is sodium hydroxide; Preferably, the organic solvent is glycerol.

12. The foam fire extinguishing agent composition according to any one of claims 1 to 11, characterized in that: The preservative is sodium benzoate.

13. Use of the foam fire extinguishing agent composition according to any one of claims 1 to 12 in underwater jet fire extinguishing.

14. A method of underwater jet fire extinguishing, characterized in that: The method is implemented using the foam fire extinguishing agent composition according to any one of claims 1 to 12, and the method comprises the following steps: (1) mixing component A with water to obtain solution A; (2) mixing component B with water to obtain solution B; (3) Mix solution A and solution B, generate foam, and then let foam enter the tank from the bottom to extinguish the fire.

15. The method according to claim 14, characterized in that The weight ratio of the water in step (1) to the water in step (2) is 2-4.5:1, preferably 3-4:1.

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