High-efficiency flame-eliminating aerosol coolant and preparation method thereof

Abstract

The invention relates to the technical field of fire extinguishing agents, and discloses an efficient flame-eliminating aerosol coolant and a preparation method, the coolant comprises a stable solid component, an auxiliary fire extinguishing component and an additive, the mass ratio of the stable solid component to the auxiliary fire extinguishing component to the additive is (20-50): (20-80): (2-20), the stable solid component is a solid component which is not decomposed at a high temperature or is still a solid component after being decomposed, and the proportion of the stable solid component in the coolant is 20% or above. According to the invention, a stable solid component is adopted to replace a traditional physical coolant, a stable physical form can be maintained in a high-temperature environment, and a physical barrier is formed to block flame propagation. And meanwhile, the auxiliary fire extinguishing components are easily subjected to chemical decomposition reaction under a high-temperature condition, so that the core fire extinguishing capacity of the coolant is not influenced. Therefore, the coolant has better cooling effect and flame suppression capability, is safe to use and is easy to prepare and form.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing agent technology, specifically to a high-efficiency flame-extinguishing aerosol coolant and its preparation method. Background Technology

[0002] In the field of aerosol fire suppression technology, coolants are extremely important for fire suppression effectiveness and equipment safety. Currently, there are three main types of coolants: chemical, physical, and a mixture of both, but each has certain limitations in its application scenarios.

[0003] CN105238366A discloses a chemical coolant composed of sodium silicate, polyvinyl alcohol, basic magnesium carbonate, and basic manganese carbonate, which decomposes upon heating and absorbs heat through the decomposition reaction to achieve cooling. After the fire extinguishing device is activated, the initiator activates the aerosol generator, and the generated heat promotes the decomposition of the chemical coolant. However, this type of coolant rapidly decomposes into gaseous compounds when released by the aerosol device, resulting in poor effectiveness in blocking flame propagation and making effective flame suppression difficult.

[0004] CN102872557A discloses physical coolants as alternatives to chemical coolants in aerosol fire extinguishing devices, such as using ceramic Raschig rings or hollow metal bodies as coolants, cooling through heat exchange. However, this method cannot quickly reduce the temperature of the extinguishing medium to the effective extinguishing range. More seriously, physical coolants like ceramic balls have a strong aerosol adsorption capacity, with a large amount of aerosol being adsorbed onto their surface, greatly weakening the aerosol's fire extinguishing ability.

[0005] CN116515466A discloses an aerosol composite coolant, in which a chemical coolant is impregnated and loaded onto a molecular sieve of a physical coolant. The aim is to suppress combustion by generating free radicals through the decomposition of the chemical coolant, while the molecular sieve adsorbs the flame, thus achieving cooling and flame suppression. However, in this composite coolant, the chemical coolant gradually melts during thermal decomposition. Driven by a large amount of gas, this molten chemical coolant adheres to the surface of the physical coolant particles, causing them to press and stick together. As the local temperature decreases, the adhered parts gradually solidify, blocking the originally gapped channels of the physical coolant. This leads to a sharp increase in internal pressure, potentially causing serious safety accidents such as explosions. Summary of the Invention

[0006] This invention provides a high-efficiency flame-extinguishing aerosol coolant and its preparation method. By using stable solid components and ensuring a certain proportion, combined with auxiliary fire-extinguishing components, the prepared coolant has good cooling effect and flame-extinguishing ability, is safe to use, and is easy to prepare and mold.

[0007] The technical solution of the present invention is to provide an easily formable, high-efficiency flame-extinguishing aerosol coolant, comprising a stable solid component, an auxiliary fire-extinguishing component, and an additive, wherein the mass ratio of the three components is 20~50:20~80:2~20, wherein the stable solid component is a component that does not decompose at 1200-1600℃ or remains solid after decomposition, and its proportion in the coolant is more than 20%.

[0008] Optionally, the stable solid component is one or a combination of several of the following: silicon dioxide, aluminum oxide, titanium dioxide, iron tetroxide, zirconium oxide, sodium silicate, white corundum, cerium oxide, yttrium oxide, silicon carbide, boron nitride, silicon nitride, aluminum nitride, boron carbide, kaolin, zeolite, bentonite, sepiolite, mica, talc, borax, ceramic fiber, barium sulfate, and titanium carbide.

[0009] Optionally, the stable solid component is one or a combination of several of the following: silicon dioxide, sodium silicate, silicon carbide, boron nitride, aluminum nitride, boron carbide, kaolin, zeolite, bentonite, sepiolite, mica, talc, borax, ceramic fiber, barium sulfate, and titanium carbide.

[0010] Optionally, the auxiliary fire extinguishing components are one or more combinations of potassium bicarbonate, sodium bicarbonate, ammonium dihydrogen phosphate, tricalcium phosphate, potassium nitrate, nitroguanidine, ammonium sulfate, zinc borate, ammonium molybdate, aluminum hypophosphite, citric acid, terephthalic acid, phthalic acid, cinnamic acid, benzoic acid, sodium lauryl sulfate, potassium hydrogen tartrate, dicyandiamide, melamine, dicyandiamide, nitroguanidine, urea, magnesium hydroxide, and red phosphorus. Preferably, they are one or more combinations of tricalcium phosphate, potassium nitrate, nitroguanidine, ammonium sulfate, zinc borate, ammonium molybdate, aluminum hypophosphite, sodium lauryl sulfate, potassium hydrogen tartrate, dicyandiamide, melamine, dicyandiamide, nitroguanidine, urea, magnesium hydroxide, and red phosphorus.

[0011] Optionally, the additive is one or more combinations of hydroxypropyl methylcellulose, methylcellulose, ethylcellulose, hydroxyethylcellulose, sodium carboxymethylcellulose, polyvinylpyrrolidone, starch, pregelatinized starch, epoxy resin, phenolic resin, shellac, magnesium stearate, ethylene bis-stearamide, calcium stearate, polyethylene glycol, glycerin, and dibutyl phthalate. Preferably, it is one or more combinations of hydroxypropyl methylcellulose, methylcellulose, hydroxyethylcellulose, sodium carboxymethylcellulose, polyvinylpyrrolidone, starch, pregelatinized starch, shellac, magnesium stearate, ethylene bis-stearamide, calcium stearate, polyethylene glycol, glycerin, and dibutyl phthalate.

[0012] Optionally, the stabilized solid component, the auxiliary fire extinguishing component, and the additives are in a mass ratio of 20-40:40-75:2-20.

[0013] This invention also relates to a method for preparing the aforementioned coolant, the specific steps of which are as follows: Weigh each raw material according to the proportion, add alcohol and mix well, then granulate with a sieve, dry, and mix evenly. After mixing evenly, granulate with a sieve, dry, and press the dried material through a tablet press to obtain chemical coolant tablets for aerosol fire extinguishing agents.

[0014] Optionally, the amount of alcohol added is 5%-15% of the material mass, and the mixing time is 10-30 minutes; a 20-40 mesh screen is used for granulation; the mold of the tablet press is made of wear-resistant material or has a wear-resistant coating.

[0015] The present invention has the following beneficial effects: This invention uses stable solid components to replace traditional physical coolants. During the aerosol fire extinguishing agent release process, the stable solid components are not prone to decomposition or remain solid after decomposition, maintaining a stable physical form. By controlling a certain content, a large amount of stable solid components accumulate around the flame, forming a robust solid physical barrier that directly blocks the flame propagation path. This physically severs the heat transfer chain and chain reaction propagation channel of the flame, completely solving the problem of weak flame-suppressing ability in existing technologies and achieving a significant improvement in flame-suppressing effect. The introduction of a high proportion of stable solid components effectively reduces the melting and adhesion of auxiliary fire extinguishing components at high temperatures. Furthermore, the stable solid components are not porous, significantly reducing the risk of coolant channels being blocked due to particle adhesion.

[0016] In the coolant formulation of this invention, since a certain amount of stable solid components are added, the cooling effect is generally poor. Therefore, highly efficient auxiliary fire extinguishing components are added, which decompose rapidly in high-temperature flames. The decomposition reaction absorbs heat energy to improve its cooling capacity and produces gaseous or easily collapsible particulate components, which play a chemical fire extinguishing role and ensure that the core fire extinguishing capacity of the coolant is not affected.

[0017] In this invention, due to the increased content of stable solid components, the hardness is higher, which can easily cause wear on the mold surface and deformation of the cavity during the coolant sheet forming process. Therefore, during the production process, the mold is preferably made of wear-resistant substrate or a material with a wear-resistant layer coated on the substrate surface to reduce mold wear and deformation and ensure sheet forming efficiency and quality. Attached Figure Description

[0018] Figure 1 This is a product photo of Example 4.

[0019] Figure 2 This is a product photo from Example 9. Detailed Implementation

[0020] Unless otherwise specified, the experimental methods used in the following examples are conventional methods. Unless otherwise specified, the materials used in the following examples are commercially available products.

[0021] The high-efficiency flame-extinguishing aerosol coolant of the present invention comprises a stable solid component, an auxiliary fire-extinguishing component, and an additive, wherein the mass ratio of the three is 20~50:20~80:2~20, preferably 20-40:40-75:2-20, wherein the stable solid component is a component that does not decompose at 1200-1600℃ or remains a solid component after decomposition, and its proportion in the coolant is more than 20%.

[0022] In some embodiments, the stable solid component may be one or a combination of several of the following: silicon dioxide, aluminum oxide, titanium dioxide, iron oxide, zirconium oxide, sodium silicate, white corundum, cerium oxide, yttrium oxide, silicon carbide, boron nitride, silicon nitride, aluminum nitride, boron carbide, kaolin, zeolite, bentonite, sepiolite, mica, talc, borax, ceramic fiber, barium sulfate, and titanium carbide. Preferably, one or a combination of several of the following are selected: silicon dioxide, silicon carbide, boron nitride, silicon nitride, aluminum nitride, boron carbide, kaolin, zeolite, bentonite, sepiolite, mica, talc, borax, ceramic fiber, barium sulfate, and titanium carbide.

[0023] In some embodiments, the auxiliary fire extinguishing components may be one or a combination of several selected from potassium bicarbonate, sodium bicarbonate, ammonium dihydrogen phosphate, tricalcium phosphate, potassium nitrate, nitroguanidine, ammonium sulfate, zinc borate, ammonium molybdate, aluminum hypophosphite, citric acid, terephthalic acid, phthalic acid, cinnamic acid, benzoic acid, sodium lauryl sulfate, potassium hydrogen tartrate, dicyandiamide, melamine, dicyandiamide, nitroguanidine, urea, magnesium hydroxide, and red phosphorus. Preferably, one or a combination of several selected from tricalcium phosphate, potassium nitrate, nitroguanidine, ammonium sulfate, zinc borate, ammonium molybdate, aluminum hypophosphite, sodium lauryl sulfate, potassium hydrogen tartrate, dicyandiamide, melamine, dicyandiamide, nitroguanidine, urea, magnesium hydroxide, and red phosphorus are used.

[0024] In some embodiments, the additive is one or more combinations of hydroxypropyl methylcellulose, methylcellulose, ethylcellulose, hydroxyethylcellulose, sodium carboxymethylcellulose, polyvinylpyrrolidone, starch, pregelatinized starch, epoxy resin, phenolic resin, shellac, magnesium stearate, ethylene bis-stearamide, calcium stearate, polyethylene glycol, glycerin, and dibutyl phthalate. Preferably, it is one or more combinations of hydroxypropyl methylcellulose, methylcellulose, hydroxyethylcellulose, sodium carboxymethylcellulose, polyvinylpyrrolidone, starch, pregelatinized starch, shellac, magnesium stearate, ethylene bis-stearamide, calcium stearate, polyethylene glycol, glycerin, and dibutyl phthalate.

[0025] The embodiments of the present invention will be described in detail below with reference to examples. However, those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be regarded as limiting the scope of the present invention.

[0026] Example 1 (1) Weigh the stable solid components (25 parts silicon dioxide, 10 parts aluminum oxide), auxiliary fire extinguishing components (20 parts potassium bicarbonate, 30 parts potassium hydrogen tartrate), and additives (10 parts hydroxypropyl methylcellulose, 5 parts magnesium stearate) and place them in a mixing container; (2) Add alcohol (8% of the total material mass) to the container and stir for 15 minutes until homogeneous; (3) Granulate the mixture by passing it through a 30-mesh sieve; (4) After granulation, the material is dried at 50°C for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press, and the mold material is high-speed steel.

[0027] The extinguishing time for Class B fires and the presence of open flames at the nozzle were tested according to the XF 499.1-2010 standard model. The mold wear and tablet hardness of the coolant were also measured. The aerosol generator used in the tests was a 62% potassium nitrate, 18% guanidine nitrate, and 14% phenolic resin compressed into a column with dimensions of Φ60×180mm.

[0028] Example 2 (1) Weigh out the stable solid components (15 parts silicon carbide, 10 parts boron nitride), auxiliary fire extinguishing components (30 parts zinc borate, 30 parts melamine), and additives (10 parts polyvinylpyrrolidone, 5 parts ethylene bis-stearamide) and place them in a mixing container; (2) Add alcohol (12% of the total material mass) to the container and stir for 20 minutes until homogeneous; (3) Granulate the mixture by passing it through a 20-mesh sieve; (4) After granulation, the material is dried at 45°C for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press, and the mold material is hard alloy.

[0029] The test was conducted in the same manner as in Example 1.

[0030] Example 3 (1) Weigh out the stable solid components (20 parts zirconium oxide, 10 parts silicon carbide), auxiliary fire extinguishing components (40 parts potassium hydrogen tartrate, 10 parts guanidine nitrate, 5 parts red phosphorus), and additives (10 parts starch, 5 parts calcium stearate), and place them in a mixing container; (2) Add alcohol (7% of the total material mass) to the container and stir for 10 minutes until homogeneous; (3) Granulate the mixture by passing it through a 20-mesh sieve; (4) After granulation, the material is dried at 55°C for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press, and the mold material is zirconium oxide ceramic.

[0031] The test was conducted in the same manner as in Example 1.

[0032] Example 4 (1) Weigh out the stable solid components (20 parts sodium silicate, 20 parts white corundum), auxiliary fire extinguishing components (20 parts silicon carbide, 20 parts ammonium molybdate, 10 parts potassium hydrogen tartrate), and additives (8 parts epoxy resin, 2 parts ethylene bis-stearamide), and place them in a mixing container; (2) Add alcohol (10% of the total material mass) to the container and stir for 25 minutes until homogeneous; (3) Granulate the mixture by passing it through a 40-mesh sieve; (4) After granulation, the material is dried at 45°C for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press. The mold material is high-speed steel with a titanium nitride coating on the surface.

[0033] The test was conducted in the same manner as in Example 1.

[0034] Example 5 (1) Weigh out the stable solid components (10 parts cerium oxide, 10 parts yttrium oxide, 5 parts talc), auxiliary fire extinguishing components (25 parts sodium bicarbonate, 40 parts ammonium sulfate), and additives (8 parts phenolic resin, 2 parts magnesium stearate) and place them in a mixing container; (2) Add alcohol (10% of the total material mass) to the container and stir for 30 minutes until homogeneous; (3) Granulate the mixture by passing it through a 20-mesh sieve; (4) After granulation, the material is dried at 60°C for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press, and the mold material is silicon nitride ceramic.

[0035] The test was conducted in the same manner as in Example 1.

[0036] Example 6 (1) Weigh out the stable solid components (10 parts aluminum nitride, 15 parts boron carbide), auxiliary fire extinguishing components (30 parts nitroguanidine, 30 parts potassium nitrate), and additives (10 parts hydroxypropyl methylcellulose, 5 parts magnesium stearate) and place them in a mixing container; (2) Add alcohol (10% of the total material mass) to the container and stir for 18 minutes until homogeneous; (3) Granulate the mixture by passing it through a 20-mesh sieve; (4) After granulation, the material is dried at 50°C for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press, and the mold material is cubic boron nitride.

[0037] The test was conducted in the same manner as in Example 1.

[0038] Example 7 (1) Weigh out the stable solid components (20 parts kaolin, 15 parts boron nitride), auxiliary fire extinguishing components (20 parts aluminum hypophosphite, 30 parts nitroguanidine), and additives (5 parts polyethylene glycol, 10 parts phenolic resin) and place them in a mixing container; (2) Add alcohol (6% of the total material mass) to the container and stir for 22 minutes until homogeneous; (3) Granulate the mixture by passing it through a 30-mesh sieve; (4) After granulation, the material is dried at 48°C for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press. The mold material is mold steel with aluminum titanium nitride coating on the surface.

[0039] The test was conducted in the same manner as in Example 1.

[0040] Example 8 (1) Weigh out the stable solid components (10 parts bentonite, 10 parts sepiolite, 10 parts mica), auxiliary fire extinguishing components (potassium hydrogen tartrate, 15 parts urea, 5 parts melamine), and additives (7 parts pregelatinized starch, 3 parts glycerin), and place them in a mixing container. (2) Add alcohol (12% of the total material mass) to the container and stir for 18 minutes until homogeneous; (3) Granulate the mixture by passing it through a 40-mesh sieve; (4) After granulation, the material is dried at 52°C for 24 hours until the volatile matter content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press, and the mold material is alumina ceramic.

[0041] The test was conducted in the same manner as in Example 1.

[0042] Example 9 (1) Weigh out the stable solid components (15 parts borax, 20 parts ceramic fiber), auxiliary fire extinguishing components (25 parts phthalic acid, 30 parts zinc borate), and additives (7 parts hydroxypropyl methylcellulose, 3 parts dibutyl phthalate) and place them in a mixing container; (2) Add alcohol (10% of the total material mass) to the container and stir for 28 minutes until homogeneous; (3) Granulate the mixture by passing it through a 20-mesh sieve; (4) After granulation, the material is dried at 42℃ for 24 hours until the volatile matter content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press, and the mold material is a diamond insert mold.

[0043] The test was conducted in the same manner as in Example 1.

[0044] Example 10 (1) Weigh out the stable solid components (10 parts barium sulfate, 10 parts titanium carbide, 10 parts talc), auxiliary fire extinguishing components (45 parts magnesium hydroxide, 10 parts red phosphorus), and additives (10 parts polyvinylpyrrolidone, 5 parts ethylene bis-stearamide) and place them in a mixing container; (2) Add alcohol (10% of the total material mass) to the container and stir for 16 minutes until homogeneous; (3) Granulate the mixture by passing it through a 20-mesh sieve; (4) After granulation, the material is dried at 58°C for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press. The mold material is high-speed steel with a diamond-like coating on the surface.

[0045] The test was conducted in the same manner as in Example 1.

[0046] Example 11 (1) Weigh out the stable solid components (5 parts titanium dioxide, 10 parts iron oxide, 10 parts silicon dioxide), auxiliary fire extinguishing components (10 parts potassium bicarbonate, 15 parts nitroguanidine, 40 parts potassium hydrogen tartrate), and additives (7 parts starch, 3 parts magnesium stearate), and place them in a mixing container; (2) Add alcohol (10% of the total material mass) to the container and stir for 24 minutes until homogeneous; (3) Granulate the mixture by passing it through a 20-mesh sieve; (4) After granulation, the material is dried at 46°C for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press, and the mold material is hard alloy.

[0047] The test was conducted in the same manner as in Example 1.

[0048] Example 12 (1) Weigh out the stable solid components (15 parts silicon nitride, 15 parts aluminum nitride), auxiliary fire extinguishing components (30 parts ammonium molybdate, 30 parts ammonium sulfate), and additives (3 parts epoxy resin, 7 parts polyethylene glycol) and place them in a mixing container; (2) Add alcohol (10% of the total material mass) to the container and stir for 14 minutes until homogeneous; (3) Granulate the mixture by passing it through a 20-mesh sieve; (4) After granulation, the material is dried at 54℃ for 24 hours until the volatile matter content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press, and the mold material is silicon nitride ceramic.

[0049] The test was conducted in the same manner as in Example 1.

[0050] Example 13 (1) Weigh out the stable solid components (20 parts zirconium oxide, 10 parts white corundum), auxiliary fire extinguishing components (40 parts potassium nitrate, 20 parts urea), and additives (3 parts shellac, 7 parts phenolic resin) and place them in a mixing container; (2) Add alcohol (12% of the total material mass) to the container and stir for 26 minutes until homogeneous; (3) Granulate the mixture by passing it through a 20-mesh sieve; (4) After granulation, the material is dried at 44℃ for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press. The mold material is mold steel with a titanium nitride coating on the surface.

[0051] The test was conducted in the same manner as in Example 1.

[0052] Example 14 (1) Weigh out the stable solid components (10 parts silicon carbide, 10 parts kaolin, 5 parts bentonite), auxiliary fire extinguishing components (25 parts aluminum hypophosphite, 35 parts potassium hydrogen tartrate), and additives (8 parts pregelatinized starch, 7 parts calcium stearate), and place them in a mixing container. (2) Add alcohol (10% of the total material mass) to the container and stir for 19 minutes until homogeneous; (3) Granulate the mixture by passing it through a 20-mesh sieve; (4) After granulation, the material is dried at 56°C for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press, and the mold material is zirconium oxide ceramic.

[0053] The test was conducted in the same manner as in Example 1.

[0054] Example 15 (1) Weigh out the stable solid component (22 parts boron carbide), the auxiliary fire extinguishing component (30 parts melamine, 40 parts nitroguanidine), and the additives (6 parts phenolic resin, 2 parts glycerin) and place them in a mixing container; (2) Add alcohol (10% of the total material mass) to the container and stir for 21 minutes until homogeneous; (3) Granulate the mixture by passing it through a 20-mesh sieve; (4) After granulation, the material is dried at 50°C for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press, and the mold material is cubic boron nitride.

[0055] The test was conducted in the same manner as in Example 1.

[0056] Comparative Example 1 (1) Weigh out the stable solid component (12 parts boron carbide), the auxiliary fire extinguishing component (40 parts melamine, 40 parts nitroguanidine), and the additives (6 parts phenolic resin, 2 parts glycerin) and place them in a mixing container; (2) Add alcohol (10% of the total material mass) to the container and stir for 21 minutes until homogeneous; (3) Granulate the mixture by passing it through a 20-mesh sieve; (4) After granulation, the material is dried at 48°C for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press. The mold material is mold steel with aluminum titanium nitride coating on the surface.

[0057] The test was conducted in the same manner as in Example 1.

[0058] Comparative Example 2 (1) Weigh out the stable solid components (5 parts aluminum nitride, 5 parts boron carbide), auxiliary fire extinguishing components (35 parts nitroguanidine, 40 parts potassium nitrate), and additives (10 parts shellac, 5 parts magnesium stearate) and place them in a mixing container; (2) Add alcohol (10% of the total material mass) to the container and stir for 18 minutes until homogeneous; (3) Granulate the mixture by passing it through a 20-mesh sieve; (4) After granulation, the material is dried at 50°C for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press, and the mold material is cubic boron nitride.

[0059] The test was conducted in the same manner as in Example 1.

[0060] Comparative Example 3 (1) Weigh out the stable solid components (15 parts silicon dioxide, 15 parts aluminum oxide, 10 parts boron carbide), auxiliary fire extinguishing components (40 parts melamine, 10 parts nitroguanidine), and additives (3 parts phenolic resin, 7 parts glycerin) and place them in a mixing container; (2) Add alcohol (10% of the total material mass) to the container and stir for 19 minutes until homogeneous; (3) Granulate the mixture by passing it through a 20-mesh sieve; (4) After granulation, the material is dried at 56°C for 24 hours until the volatile content is less than 0.5%; (5) Force the dried material through a 20-mesh sieve; (6) Chemical coolant tablets for aerosol fire extinguishing agent are obtained by pressing with a tablet press, and the mold material is 316 stainless steel.

[0061] The test was conducted in the same manner as in Example 1.

[0062] Table 1

[0063] As can be seen from Table 1, compared with Comparative Example 2, Example 6 and Comparative Example 1, and Example 15 and Comparative Example 1, show that the flame extinguishing effect is significantly better when the fire extinguishing capacity is not much different. The solid stable component with a mass of more than 20% is significantly better.

[0064] The above embodiments describe preferred embodiments of the present invention, but the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other way. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A high-efficiency flame-suppressing aerosol coolant, characterized in that: It includes a stabilized solid component, an auxiliary fire extinguishing component, and additives, with a mass ratio of 20~50:20~80:2~20. The stabilized solid component is a component that does not decompose at 1200-1600℃ or remains solid after decomposition, and its proportion in the coolant is more than 20%.

2. The coolant according to claim 1, characterized in that: The stable solid component is one or a combination of several of the following: silicon dioxide, aluminum oxide, titanium dioxide, iron tetroxide, zirconium oxide, sodium silicate, white corundum, cerium oxide, yttrium oxide, silicon carbide, boron nitride, silicon nitride, aluminum nitride, boron carbide, kaolin, zeolite, bentonite, sepiolite, mica, talc, borax, ceramic fiber, barium sulfate, and titanium carbide.

3. The coolant according to claim 2, characterized in that: The stable solid component is one or a combination of several of the following: silicon dioxide, silicon carbide, boron nitride, aluminum nitride, boron carbide, kaolin, zeolite, bentonite, sepiolite, mica, talc, borax, ceramic fiber, barium sulfate, and titanium carbide.

4. The coolant according to claim 1, characterized in that: The auxiliary fire extinguishing components are one or a combination of several of the following: potassium bicarbonate, sodium bicarbonate, ammonium dihydrogen phosphate, tricalcium phosphate, potassium nitrate, nitroguanidine, ammonium sulfate, zinc borate, ammonium molybdate, aluminum hypophosphite, citric acid, terephthalic acid, phthalic acid, cinnamic acid, benzoic acid, sodium dodecyl sulfate, potassium hydrogen tartrate, dicyandiamide, melamine, dicyandiamide, nitroguanidine, urea, magnesium hydroxide, and red phosphorus.

5. The coolant according to claim 4, characterized in that: The auxiliary fire extinguishing components are one or a combination of tricalcium phosphate, potassium nitrate, nitroguanidine, ammonium sulfate, zinc borate, ammonium molybdate, aluminum hypophosphite, sodium dodecyl sulfate, potassium hydrogen tartrate, dicyandiamide, melamine, nitroguanidine, urea, magnesium hydroxide, and red phosphorus.

6. The coolant according to claim 1, characterized in that: The additive is one or more of the following: hydroxypropyl methylcellulose, methylcellulose, ethylcellulose, hydroxyethylcellulose, sodium carboxymethylcellulose, polyvinylpyrrolidone, starch, pregelatinized starch, epoxy resin, phenolic resin, shellac, magnesium stearate, ethylene bis-stearamide, calcium stearate, polyethylene glycol, glycerol, and dibutyl phthalate.

7. The coolant according to any one of claims 1 to 6, characterized in that: The stabilized solid components, auxiliary fire extinguishing components, and additives are in a mass ratio of 20-40:40-75:2-20.

8. The method for preparing the coolant according to any one of claims 1 to 7, characterized in that, The specific steps are as follows: Weigh each raw material according to the proportion, add alcohol and mix well, then granulate with a sieve, dry, and mix evenly. After mixing evenly, granulate with a sieve, dry, and press the dried material through a tablet press to obtain chemical coolant tablets for aerosol fire extinguishing agents.

9. The preparation method according to claim 8, characterized in that: The die material for the die-cutting machine is selected from one of cemented carbide, zirconia ceramic, alumina ceramic, silicon nitride ceramic, cubic boron nitride, and diamond; or a die substrate with a surface coated with titanium nitride, aluminum titanium nitride, or diamond-like carbon coating, wherein the die substrate includes, but is not limited to, high-speed steel or die steel.

10. The preparation method according to claim 8, characterized in that: The amount of alcohol added is 5%-15% of the material mass, and the mixing time is 10-30 minutes; a 20-40 mesh screen is used for granulation; the mold of the tablet press is made of wear-resistant material or has a wear-resistant coating.

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