A low-boiling-point slow-release cooling fire extinguishing agent and its preparation method and application

Abstract

The present invention discloses a low-boiling-point slow-release cooling fire extinguishing agent, a preparation method thereof, and an application thereof, belonging to the technical field of fire extinguishing materials. The fire extinguishing agent is formed by combining and compounding a low-boiling-point gas fire extinguishing agent having a boiling point below 0°C under standard atmospheric pressure, a hydrophobic porous adsorption powder, and an adsorption improver; wherein the mass ratio of the low-boiling-point gas fire extinguishing agent, the porous adsorption powder, and the adsorption improver is 60-90:10-40:0.1-6. The present invention delays the vaporization of the low-boiling-point gas fire extinguishing agent by adding a porous adsorption powder material to the liquid low-boiling-point gas fire extinguishing agent, thereby effectively solving the problem of the low-boiling-point gas fire extinguishing agent being completely vaporized in the fire extinguisher bottle or pipeline when released; by adding the adsorption improver, the polarity and surface tension of the liquid low-boiling-point gas fire extinguishing agent are regulated to enhance the adsorption effect; the hydrophobic porous adsorption powder can significantly reduce the agglomeration of the solid powder and enhance its flow properties.

Description

Technical Field

[0001] The present invention relates to the field of fire fighting technology, and more particularly to a low-boiling-point slow-release cooling fire extinguishing agent, a preparation method thereof, and an application thereof. Background Art

[0002] In recent years, fires caused by lithium batteries in electric vehicles and energy storage power plants have become frequent. Efficient fire extinguishing technology is a key measure to ensure the safe use of lithium batteries. However, due to the complexity of lithium battery fires, they are difficult to extinguish. Lithium batteries are particularly prone to reignition, which can easily lead to secondary fires, posing a significant challenge to firefighting. Existing research has shown that rapidly cooling lithium batteries is an effective method to prevent re-ignition.

[0003] Patent (CN202310605248.X) discloses a method for preparing a cooling-type dry powder fire extinguishing agent based on a dry water fire extinguishing agent. The dry water fire extinguishing agent prepared by this method has the advantages of good cooling effect and non-conductivity; Patent (CN202111393988.9) discloses a method for preparing a composite fire extinguishing agent with a cooling function based on a hydrated salt. This fire extinguishing agent also has good cooling and fire extinguishing performance. Although the above-mentioned cooling-type fire extinguishing agent has good cooling performance, its cooling mechanism is mainly based on the heat absorption of water vaporization and the heat absorption of the solid-liquid phase change of the hydrated salt material. Its minimum cooling temperature is usually higher than the boiling point of water or the phase change temperature of the hydrated salt material (above 50°C). However, as the size of lithium batteries continues to increase, due to the temperature difference decreasing effect, even if the surface temperature of the battery reaches 50°C, its internal center temperature can still reach a higher lithium battery thermal runaway temperature.

[0004] Therefore, an ultra-low temperature cooling refrigerant is developed to reduce the surface temperature of the battery to below 0°C or even lower, which can effectively control the internal center temperature of the battery to below its thermal runaway temperature. Summary of the Invention

[0005] To address these issues, the present invention provides a low-boiling-point, slow-release, cooling fire extinguishing agent that can be used to extinguish battery fires. The main principle of this fire extinguishing agent is that it utilizes the low boiling point of low-boiling-point gas fire extinguishing agents, which can reduce the temperature of the object to be cooled to around its boiling point when vaporized.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A low-boiling-point slow-release cooling fire extinguishing agent, which is prepared by combining a low-boiling-point gas fire extinguishing agent with a boiling point below 0°C under standard atmospheric pressure, a porous adsorption powder, and an adsorption improving agent;

[0008] The mass ratio of the low-boiling-point gas fire extinguishing agent, the porous adsorption powder and the adsorption improving agent is 60-90:10-40:0.1-6.

[0009] The beneficial effects of adopting the above technical solution are as follows: low-boiling-point gas fire extinguishing agents are very easy to vaporize. In actual use, the vaporization process is usually completely vaporized in the fire extinguisher bottle or pipeline, and it is difficult to reach the surface of the object to be cooled to vaporize and cool down, thus failing to achieve the purpose of cooling. By adding porous adsorption powder material, the micropores are used to adsorb liquid low-boiling-point gas fire extinguishing agents, thereby delaying the vaporization of low-boiling-point gas fire extinguishing agents. This can effectively solve the problem that low-boiling-point gas fire extinguishing agents are completely vaporized in the fire extinguisher bottle or pipeline when released, and achieve the goal of low-boiling-point gas fire extinguishing agents reaching the fire extinguishing object. In addition, in order to solve the problems of non-wetting and poor adsorption effect of low-boiling-point gas fire extinguishing agents and porous adsorption powder materials, adsorption improvers are added to regulate the polarity and surface tension of the liquid low-boiling-point gas fire extinguishing agent, and the adsorption effect of the liquid low-boiling-point gas fire extinguishing agent in the porous adsorption material is improved, thereby ensuring the cooling effect; in order to solve the problems of agglomeration and poor fluidity of solid powder in liquid low-boiling-point gas fire extinguishing agent, the hydrophobic treatment of the porous adsorption powder can significantly reduce the agglomeration of the solid powder and improve its fluidity.

[0010] Preferably, the low-boiling-point gas fire extinguishing agent is a composite of one or more components of carbon dioxide and halogenated hydrocarbon low-boiling-point gas fire extinguishing agents.

[0011] Preferably, the halogenated hydrocarbon low-boiling point gas fire extinguishing agent includes at least one of octafluoropropane, heptafluoropropane, hexafluoropropane, pentafluoroethane, tetrafluoroethane, trifluoroiodomethane, and trifluoromethane.

[0012] Preferably, the porous adsorption powder is a composite of one or more components selected from metal organic framework materials, co-bonded organic framework materials, hydrogen bonded organic framework materials, porous silica, porous zeolite, porous fluorinated carbon, porous activated carbon, and aerogel powder.

[0013] Preferably, the metal organic framework material includes at least one of MOF-5, MOF-69C, MOF-74, HKUST-1, POST-1, ZIF-2, ZIF-3, ZIF-4, ZIF-5, ZIF-6, ZIF-8, ZIF-10, ZIF-11, ZIF-67, MIL-100 (Cr), MIL-101 (Cr), MIL-100 (Fe), MIL-125, UiO-66, NOTT-300, and NU-110;

[0014] The co-bonded organic framework material includes at least one of COF-1, COF-102, COF-103, PPy-COF, COF-5, COF-105, COF-108, COF-6, COF-8, COF-10, TP-COF, Pc-PBBA COF, BTP-COF, HHTP-DPB COF, COF-66, CTC-COF, COF-202, CTF-1, CTF-2, COF-300, COF-LZU1, COF-366, COF-42, and COF-43;

[0015] The hydrogen-bonded organic framework material includes at least one of HOF-1, HOF-2, HOF-3, HOF-4, HOF-5, HOF-6, HOF-8, HOF-11, HOF-BTB, HOF-TCBP, TCF-1, TCF-2, TCF-3, PFC-1, and HOF-101;

[0016] The porous fluorinated carbon includes at least one of fluorinated activated carbon, fluorinated expanded graphite, fluorinated spherical graphite, and fluorinated carbon nanotubes.

[0017] Preferably, the adsorption improver is a complex of one or more components of polyoxyethylene oleate, polyoxyethylene stearate, polyoxyethylene rosin acid, sorbitan fatty acid ester, diglycerol polypropylene glycol ether, polyvinyl alcohol, alkyl glucoside, fatty acid glyceride, fatty acid sorbitan, and polysorbate.

[0018] Preferably, the specific surface area of the porous adsorption powder is not less than 200m 2 / g, particle size not greater than 40mm.

[0019] The method for preparing the low-boiling-point slow-release cooling fire extinguishing agent as described above comprises the following steps:

[0020] (1) hydrophobizing the porous adsorption powder;

[0021] (2) Add the hydrophobic porous adsorption powder and adsorption improver into the fire extinguisher bottle, then evacuate the fire extinguisher bottle, and then use a booster pump to inject low-boiling point gas fire extinguishing agent, and add nitrogen to the required pressure according to the fire extinguisher pressure. Finally, use vibration or ultrasound to fuse the mixed liquid.

[0022] Preferably, the hydrophobic treatment method in step (1) comprises: adding the porous adsorption powder to an n-octane solvent, heating to 60-90° C., sequentially adding hydrogenated silicone oil and tetraethyl titanate under stirring, stirring for 5 minutes, adding 1-3 drops of deionized water, continuing to stir for 1-3 hours, and finally evaporating the n-octane solvent and vacuum drying to obtain a hydrophobic porous adsorption powder; wherein the mass ratio of the porous adsorption powder to hydrogenated silicone oil and tetraethyl titanate is: 97-99:1-3:0.01-0.05.

[0023] Preferably, the fire extinguisher bottle adopts a fire extinguisher bottle with a nozzle at the bottom or a nozzle at the top but with a built-in siphon.

[0024] The use of the low-boiling-point slow-release cooling fire extinguishing agent as described above or prepared by the above preparation method in extinguishing battery fires is characterized in that the battery includes: a lithium battery, a zinc-manganese battery, a nickel-hydrogen battery, a fuel cell, a zinc-air battery or a cadmium-nickel battery.

[0025] Beneficial effects of the present invention:

[0026] (1) The low-boiling-point slow-release cooling fire extinguishing agent of the present invention has a slow-release cooling fire extinguishing effect, which can achieve a cooling effect of reducing the battery surface temperature to below 0°C, achieve ultra-low temperature cooling, and has a good cooling effect, which can effectively suppress the thermal runaway and re-ignition problems of lithium batteries;

[0027] (2) The low-boiling-point slow-release cooling fire extinguishing agent of the present invention solves the problem that traditional low-boiling-point gas fire extinguishing agents are extremely volatile and cannot reach the surface of lithium batteries to vaporize and absorb heat. The porous adsorption powder adsorbs the liquid low-boiling-point gas fire extinguishing agent and delays the vaporization process of the liquid low-boiling-point gas fire extinguishing agent during the release process, thereby achieving the function of the liquid low-boiling-point gas fire extinguishing agent reaching the battery surface for ultra-low temperature cooling;

[0028] (3) Adding a small amount of adsorption improving agent to the low-boiling-point slow-release cooling fire extinguishing agent of the present invention can solve the problem of poor adsorption effect between the liquid low-boiling-point gas fire extinguishing agent and the porous adsorption powder, and achieve the maximum adsorption of the liquid low-boiling-point gas fire extinguishing agent by the porous adsorption powder;

[0029] (4) The low-boiling-point slow-release cooling fire extinguishing agent of the present invention adopts hydrophobization technology to treat porous adsorption powder, which can significantly improve the fluidity of porous adsorption powder, prevent the solid powder from agglomerating and having poor fluidity under high-pressure conditions, and reduce the residual amount of the agent in the bottle after the fire extinguisher is released; at the same time, the hydrophobization technology of the present invention adopts a high-boiling-point solvent and introduces a small amount of deionized water, which can significantly shorten the hydrophobization time under medium and high temperature conditions and improve the hydrophobization efficiency.

[0030] (5) The low-boiling-point slow-release cooling fire extinguishing agent of the present invention adopts a powder fire extinguisher device, which does not change the structure and use method of the existing powder fire extinguisher, is easy to use, and is convenient for promotion. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0032] The present invention adds porous adsorption powder material to liquid low-boiling point gas fire extinguishing agent, utilizes micropores to adsorb liquid low-boiling point gas fire extinguishing agent, thereby playing the role of delaying the vaporization of low-boiling point gas fire extinguishing agent, can effectively solve the problem that low-boiling point gas fire extinguishing agent is completely vaporized in the fire extinguisher bottle or pipeline when released, and realizes the vaporization and cooling function of low-boiling point gas fire extinguishing agent when it reaches the fire extinguishing target; in addition, in order to solve the problem that low-boiling point gas fire extinguishing agent and porous adsorption powder material may have non-wetting and poor adsorption effect, by adding adsorption improving agent, the polarity and surface tension of liquid low-boiling point gas fire extinguishing agent are regulated, and the adsorption effect of liquid low-boiling point gas fire extinguishing agent in porous adsorption material is improved, thereby ensuring the cooling effect; in order to solve the problem that solid powder may have agglomeration and poor fluidity in liquid low-boiling point gas fire extinguishing agent, by hydrophobic treatment of porous adsorption powder, the agglomeration phenomenon of solid powder can be significantly reduced, and its fluidity is improved.

[0033] Example 1

[0034] Porous silica powder (1.6 kg) was added to n-octane solvent (4.0 kg), the temperature was raised to 60°C, and hydrogenated silicone oil (16.4 g) and tetraethyl titanate (0.2 g) were added in sequence under stirring. After stirring for 5 minutes, 3 drops of deionized water were added dropwise, and stirring was continued for 0.5 hours. Finally, the n-octane solvent was evaporated and vacuum dried to obtain hydrophobic porous silica powder.

[0035] Choose a hanging fire extinguisher bottle with a nozzle at the bottom, first add hydrophobic porous silica powder

[0036] (1.6kg) and adsorption improver polysorbate (4.0g) were added to the fire extinguisher bottle, and then the fire extinguisher bottle (volume 8L) was vacuumed to a vacuum degree of 5Pa. Subsequently, a low-boiling point gas fire extinguishing agent carbon dioxide (2.4kg) was injected using a booster pump. The fire extinguisher pressure was about 5.5Mpa. Finally, the mixed liquid was fused by ultrasound (ultrasonic frequency of 20kHz, ultrasonic time of 80min).

[0037] Example 2

[0038] MOF-5 powder (0.8 kg) was added to n-octane solvent (1.6 kg), the temperature was raised to 60 ° C, and hydrogenated silicone oil (8.2 g) and tetraethyl titanate (0.22 g) were added in sequence under stirring. After stirring for 5 minutes, 1 drop of deionized water was added dropwise, and stirring was continued for 0.5 hours. Finally, the n-octane solvent was evaporated and vacuum dried to obtain hydrophobized MOF-5 powder.

[0039] A hanging fire extinguisher bottle with a nozzle at the bottom was selected. First, the hydrophobized MOF-5 powder (0.8 kg) and the adsorption improver polyoxyethylene oleate (8.0 g) were added to the fire extinguisher bottle. Then, the fire extinguisher bottle (volume 8 L) was vacuumed to a vacuum degree of 5 Pa. Subsequently, a low-boiling point gas fire extinguishing agent heptafluoropropane (3.2 kg) was injected using a booster pump. According to the pressure of the fire extinguisher, nitrogen was added to the required pressure of 1.6 MPa. Finally, the mixed liquid was fused by ultrasound (ultrasonic frequency of 20 kHz, ultrasonic time of 80 min).

[0040] Example 3

[0041] HOF-1 powder (0.8 kg) was added to n-octane solvent (1.6 kg), and the temperature was raised to 70°C. Hydrogenated silicone oil (8.9 g) and tetraethyl titanate (0.39 g) were added in sequence under stirring. After stirring for 5 minutes, 1 drop of deionized water was added dropwise, and stirring was continued for 0.5 hours. Finally, the n-octane solvent was evaporated and the mixture was vacuum dried to obtain hydrophobized HOF-1 powder.

[0042] A portable fire extinguisher bottle with a built-in siphon was selected. First, hydrophobized HOF-1 powder (0.8 kg) and adsorption improver polyoxyethylene rosin acid ester (8.0 g) were added to the fire extinguisher bottle. Then, the fire extinguisher bottle (volume 8 L) was vacuumed to a vacuum degree of 5 Pa. Subsequently, a low-boiling point gas fire extinguishing agent heptafluoropropane (3.2 kg) was injected using a booster pump. According to the pressure of the fire extinguisher, nitrogen was added to the required pressure of 1.6 MPa. Finally, the mixed liquid was fused by shaking (shaking frequency of 800 times / min, shaking time of 1 h).

[0043] Example 4

[0044] COF-1 powder (0.8 kg) was added to n-octane solvent (1.6 kg), the temperature was raised to 90 ° C, and hydrogenated silicone oil (10.0 g) and tetraethyl titanate (0.2 g) were added in sequence under stirring. After stirring for 5 minutes, 2 drops of deionized water were added, and stirring was continued for 1 hour. Finally, the n-octane solvent was evaporated and vacuum dried to obtain hydrophobized COF-1 powder.

[0045] A hanging fire extinguisher bottle with a nozzle at the bottom was selected. Hydrophobized COF-1 powder (0.7 kg) and adsorption improver polyoxyethylene stearate (10 g) were first added to the fire extinguisher bottle. Then, the fire extinguisher bottle (volume 8 L) was vacuumed to a vacuum degree of 5 Pa. Subsequently, a low-boiling point gas fire extinguishing agent trifluoroiodomethane (3.3 kg) was introduced using a booster pump. According to the pressure of the fire extinguisher, nitrogen was supplemented to the required pressure of 1.6 MPa. Finally, the mixed liquid was fused by shaking (shaking frequency of 800 times / min and shaking time of 1 h).

[0046] Example 5

[0047] Porous activated carbon powder (0.7 kg) was added to n-octane solvent (1.6 kg), the temperature was raised to 60 ° C, and hydrogenated silicone oil (10.0 g) and tetraethyl titanate (0.31 g) were added in sequence under stirring. After stirring for 5 minutes, 1 drop of deionized water was added, and stirring was continued for 1 hour. Finally, the n-octane solvent was evaporated and vacuum dried to obtain hydrophobic porous activated carbon powder.

[0048] A portable fire extinguisher bottle with a built-in siphon was selected. First, hydrophobic porous activated carbon powder (0.7 kg) and adsorption improver diglycerol polypropylene glycol ether (10 kg) were added to the fire extinguisher bottle. Then, the fire extinguishing agent bottle (volume 8 L) was vacuumed to a vacuum degree of 5 Pa. Subsequently, a low-boiling point gas fire extinguishing agent tetrafluoroethane (3.3 kg) was introduced using a booster pump. According to the pressure of the fire extinguisher, nitrogen was supplemented to the required pressure of 1.6 MPa. Finally, the mixed liquid was fused by ultrasound (ultrasonic frequency of 20 kHz, ultrasonic time of 80 min).

[0049] Example 6

[0050] Porous zeolite powder (0.9 kg) was added to n-octane solvent (2.0 kg), the temperature was raised to 70°C, and hydrogenated silicone oil (11.0 g) and tetraethyl titanate (0.39 g) were added in sequence under stirring. After stirring for 5 minutes, 1 drop of deionized water was added dropwise, and stirring was continued for 1 hour. Finally, the n-octane solvent was evaporated and vacuum dried to obtain a hydrophobized porous zeolite powder.

[0051] A portable fire extinguisher bottle with a built-in siphon tube was selected. First, hydrophobized porous zeolite powder (0.9 kg) and adsorption improver alkyl glucoside (15 kg) were added to the fire extinguisher bottle. Then, the fire extinguisher bottle (volume 8 L) was vacuumed to a vacuum degree of 5 Pa. Subsequently, a low-boiling point gas fire extinguishing agent trifluoromethane (3.1 kg) was injected using a booster pump. The fire extinguisher pressure was about 4.4 MPa. Finally, the mixed liquid was fused by ultrasound (ultrasonic frequency of 20 kHz, ultrasonic time of 80 min).

[0052] Comparative Example 1

[0053] First, the empty fire extinguishing agent tank (volume is 8L) is vacuumed to a vacuum degree of 5Pa, and then a low-boiling point gas fire extinguishing agent carbon dioxide is pumped into it using a booster pump to a pressure of 5.5Mpa (the carbon dioxide in the fire extinguisher tank is about 2.4kg).

[0054] Comparative Example 2

[0055] First, the empty fire extinguishing agent tank (volume 8L) is evacuated to a vacuum degree of 5Pa, and then a low-boiling point gas fire extinguishing agent heptafluoropropane (3.2kg) is injected using a booster pump, and nitrogen is added to the required pressure of 1.6Mpa.

[0056] Comparative Example 3

[0057] First, the empty fire extinguishing agent tank (volume 8L) was evacuated to a vacuum degree of 5Pa, and then a low-boiling point gas fire extinguishing agent trifluoroiodomethane (3.3kg) was injected using a booster pump, and nitrogen was added to the required pressure of 1.6Mpa.

[0058] Comparative Example 4

[0059] First, the empty fire extinguishing agent tank (volume 8L) is evacuated to a vacuum degree of 5Pa, and then a low-boiling point gas fire extinguishing agent tetrafluoroethane (3.3kg) is injected using a booster pump, and nitrogen is added to the required pressure of 1.6Mpa.

[0060] Comparative Example 5

[0061] HOF-1 powder (0.8 kg) was added to n-octane solvent (1.6 kg), and the temperature was raised to 70°C. Hydrogenated silicone oil (8.9 g) and tetraethyl titanate (0.39 g) were added in sequence under stirring. After stirring for 5 minutes, 1 drop of deionized water was added dropwise, and stirring was continued for 0.5 hours. Finally, the n-octane solvent was evaporated and the mixture was vacuum dried to obtain hydrophobized HOF-1 powder.

[0062] A portable fire extinguisher bottle with a built-in siphon tube was selected. First, hydrophobized HOF-1 powder (0.8 kg) was added to the fire extinguisher bottle. Then, the fire extinguisher bottle (volume 8 L) was vacuumed to a vacuum degree of 5 Pa. Subsequently, a low-boiling point gas fire extinguishing agent heptafluoropropane (3.2 kg) was injected using a booster pump. Nitrogen was added to the required pressure of 1.6 MPa according to the pressure of the fire extinguisher. Finally, the mixed liquid was fused by shaking (shaking frequency of 800 times / minute, shaking time of 1 hour).

[0063] Comparative Example 6

[0064] A portable fire extinguisher bottle with a built-in siphon tube was selected. HOF-1 powder (0.8 kg) and adsorption improver polyoxyethylene rosin acid ester (8.0 g) were first added to the fire extinguisher bottle. Then, the fire extinguisher bottle (volume 8 L) was evacuated to a vacuum degree of 5 Pa. Subsequently, a low-boiling point gas fire extinguishing agent heptafluoropropane (3.2 kg) was injected using a booster pump. Nitrogen was added to the required pressure of 1.6 MPa according to the pressure of the fire extinguisher. Finally, the mixed liquid was fused by shaking (shaking frequency of 800 times / min, shaking time of 1 h).

[0065] Effect verification experiment:

[0066] A 129Ah ternary lithium-ion battery was heated to 260°C using a heating plate. When the lithium-ion battery began to thermally runaway, the fire extinguishing agent described in the embodiment or comparative example was released. The battery surface temperature was measured using a thermocouple on the battery surface at the start and after the fire was extinguished.

[0067] The experimental results are shown in Table 1 below. It can be seen that for the same fire extinguishing agent, a low-boiling-point slow-release cooling fire extinguishing agent can achieve a greater cooling effect. For example, for the same weight of carbon dioxide fire extinguishing agent in Example 1 and Comparative Example 1, Example 1 can reduce the battery surface temperature to -23°C, while Comparative Example 1 only reduces it to 245°C; from the experimental results of Example 3 and Comparative Example 5, it can be seen that under the same conditions, the addition of an adsorption improver can reduce the battery surface temperature to -4°C, while not using an adsorption improver can only reduce the battery surface temperature to 106°C; from the experimental results of Example 3 and Comparative Example 6, it can be seen that under the same conditions, hydrophobic treatment of the porous powder can reduce the battery surface temperature to -4°C, while not hydrophobic treatment of the porous powder can only reduce the battery surface temperature to 131°C, indicating that the present invention has significant use effect.

[0068] Table 1. Results of effect verification experiments

[0069] Experiment number Battery maximum temperature / ℃ Battery minimum temperature / ℃ Battery temperature drop / ℃ Example 1 678 -23 701 Example 2 669 -5 674 Example 3 653 -4 657 Example 4 670 -7 677 Example 5 674 -8 682 Example 6 680 -19 699 Comparative Example 1 672 240 432 Comparative Example 2 675 310 365 Comparative Example 3 676 297 379 Comparative Example 4 668 273 395 Comparative Example 5 677 106 571 Comparative Example 6 683 131 552

[0070] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0071] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A low boiling point slow-release cooling fire extinguishing agent, characterized in that: The fire extinguishing agent is prepared by combining a low-boiling-point gas fire extinguishing agent having a boiling point below 0°C under standard atmospheric pressure, a hydrophobic porous adsorption powder and an adsorption improving agent; Wherein, the mass ratio of the low boiling point gas fire extinguishing agent, the porous adsorption powder and the adsorption improving agent is 60-90:10-40:0.1-6; The low-boiling-point gas fire extinguishing agent is a compound of one or more components of carbon dioxide and halogenated hydrocarbon low-boiling-point gas fire extinguishing agents; The porous adsorption powder is a composite of one or more components selected from metal organic framework materials, co-bonded organic framework materials, hydrogen bonded organic framework materials, porous silicon oxide, porous zeolite, porous fluorinated carbon, and porous activated carbon; the specific surface area of the porous adsorption powder is not less than 200 m 2 / g, particle size not greater than 40mm; The adsorption improver is a complex of one or more components of polyoxyethylene oleate, polyoxyethylene stearate, polyoxyethylene rosin acid, sorbitan fatty acid ester, diglycerol polypropylene glycol ether, polyvinyl alcohol, alkyl glucoside, fatty acid glyceride, fatty acid sorbitan, and polysorbate.

2. A low boiling point slow-release cooling fire extinguishing agent according to claim 1, characterized in that: The halogenated hydrocarbon low-boiling point gas fire extinguishing agent includes at least one of octafluoropropane, heptafluoropropane, hexafluoropropane, pentafluoroethane, tetrafluoroethane, trifluoroiodomethane and trifluoromethane.

3. A low boiling point slow-release fire extinguishing agent according to claim 1, characterized in that: The metal organic framework materials include MOF-5, MOF-69C, MOF-74, HKUST-1, POST-1, ZIF-2, ZIF-3, ZIF-4, ZIF-5, ZIF-6, At least one of ZIF-8, ZIF-10, ZIF-11, ZIF-67, MIL-100(Cr), MIL-101(Cr), MIL-100(Fe), MIL-125, UiO-66, NOTT-300, and NU-110; The co-bonded organic framework material includes at least one of COF-1, COF-102, COF-103, PPy-COF, COF-5, COF-105, COF-108, COF-6, COF-8, COF-10, TP-COF, Pc-PBBA COF, BTP-COF, HHTP-DPB COF, COF-66, CTC-COF, COF-202, CTF-1, CTF-2, COF-300, COF-LZU1, COF-366, COF-42, and COF-43; The hydrogen-bonded organic framework material includes at least one of HOF-1, HOF-2, HOF-3, HOF-4, HOF-5, HOF-6, HOF-8, HOF-11, HOF-BTB, HOF-TCBP, TCF-1, TCF-2, TCF-3, PFC-1, and HOF-101; The porous fluorinated carbon includes at least one of fluorinated activated carbon, fluorinated expanded graphite, fluorinated spherical graphite, and fluorinated carbon nanotubes.

4. A method for preparing the low-boiling-point slow-release fire extinguishing agent according to any one of claims 1 to 3, characterized in that: The following steps are involved: (1) hydrophobizing the porous adsorption powder; (2) Add the hydrophobic porous adsorption powder and adsorption improver into the fire extinguisher bottle, then evacuate the fire extinguisher bottle, and then use a booster pump to inject low-boiling point gas fire extinguishing agent, and add nitrogen to the required pressure according to the fire extinguisher pressure. Finally, use vibration or ultrasound to fuse the mixed liquid.

5. The method for preparing a low-boiling-point slow-release temperature-reducing fire extinguishing agent according to claim 4, characterized in that: The hydrophobic treatment method in step (1) comprises: adding the porous adsorption powder to an n-octane solvent, heating to 60-90° C., sequentially adding hydrogenated silicone oil and tetraethyl titanate under stirring, stirring for 5 minutes, adding 1-3 drops of deionized water, continuing to stir for 1-3 hours, and finally evaporating the n-octane solvent and vacuum drying to obtain a hydrophobic porous adsorption powder; wherein the mass ratio of the porous adsorption powder to hydrogenated silicone oil and tetraethyl titanate is: 97-99:1-3:0.01-0.

05.

6. Use of the low-boiling-point slow-release cooling fire extinguishing agent according to any one of claims 1 to 3 or the low-boiling-point slow-release cooling fire extinguishing agent prepared by the preparation method according to any one of claims 4 to 5 in extinguishing battery fires, characterized in that: The battery includes: a lithium battery, a zinc-manganese battery, a nickel-hydrogen battery, a fuel cell, a zinc-air battery or a nickel-cadmium battery.