Easily-decomposed high-performance fire extinguishing coolant for aerosol fire extinguishing agent

Abstract

In the present invention, an organic acid potassium salt and a forming aid are used as raw materials to develop a novel coolant. When used in combination with an aerosol, compared with conventional chemical coolants and physical coolants, the novel coolant has remarkably improved fire extinguishing capability and electrical insulation performance, the fire extinguishing capability is improved from 65 g / m3-100 g / m3 to 35 g / m3-47 g / m3, and the electrical insulation performance is improved from 0-20 MΩ to 200-2200 MΩ.

Description

An easily decomposable high-performance fire extinguishing coolant for aerosol fire extinguishing agents Technical Field

[0001] The invention belongs to the technical field of fire fighting and extinguishing, and in particular relates to an easily decomposable high-performance fire extinguishing coolant for an aerosol fire extinguishing agent. Background Art

[0002] Aerosol fire extinguishing agents generate intense, high-temperature impingement flames when sprayed. To ensure the safe use of aerosol fire extinguishing devices or fire extinguishers, an external coolant is required to cool the flame. Current methods for cooling the flame during aerosol spraying primarily employ physical or chemical methods. While physical coolants, such as ceramic balls, offer good flame-suppression and cooling effects, their high adsorption of the sprayed aerosol significantly reduces the aerosol's fire-extinguishing capacity. Currently used chemical coolants primarily suppress flames and reduce temperature. While this impact is less pronounced than with physical coolants like ceramic balls, they still weaken the aerosol's fire-extinguishing capacity overall. This is primarily because the coolant first melts at high temperatures and then decomposes under continued high temperatures, producing a large amount of residue. This molten residue blocks the released aerosol fire extinguishing agent, reducing its fire-extinguishing capacity. Furthermore, current coolants either suppress flames or improve electrical insulation, failing to address both parameters simultaneously.

[0003] The present invention adopts organic acid potassium salt as the coolant of the aerosol fire extinguishing agent, which greatly improves the decomposition efficiency of the coolant compared with inorganic salt formulas, fully absorbs the heat released by the aerosol fire extinguishing agent, effectively reduces the product spraying temperature, fully releases the fire extinguishing particles, and greatly improves the fire extinguishing ability of the product. In addition, the organic particles produced by the decomposition have the characteristic of weak hygroscopicity, which effectively improves the electrical insulation of the sprayed material.

[0004] Summary of the Invention

[0005] The invention provides an easily decomposable high-performance fire extinguishing coolant for an aerosol fire extinguishing agent, comprising the following components in parts by mass: 90 to 100 parts of an organic acid potassium salt and 1 to 10 parts of a molding aid.

[0006] The organic acid potassium salt is a combination of two or more of potassium hydrogen tartrate, potassium formate, potassium cinnamate, potassium benzoate, potassium methylmalonate, potassium ethyl oxalate, potassium lactate, potassium ethylmalonate, and potassium hydroxycitrate.

[0007] The molding aid is any one of hydroxypropyl methylcellulose, ethyl cellulose, polyvinyl alcohol, phenolic resin, urea-formaldehyde resin, melamine formaldehyde resin, polyurethane, epoxy resin, and carboxymethyl cellulose.

[0008] The present invention also relates to a method for preparing the easily decomposable high-performance fire extinguishing coolant for the aerosol fire extinguishing agent, comprising the following steps:

[0009] S1. Mix the organic acid potassium salt and the molding aid;

[0010] S2. Add solvent to S1 and mix well;

[0011] S3. Granulate, dry and tablet the material obtained in S2 to obtain 6 mm × 6 mm coolant tablets.

[0012] The mixing time in S1 is 5 min to 20 min.

[0013] The solvent in S2 is one or more of water or ethanol; the mass of the added solvent is 5% to 30% of the material obtained in S1.

[0014] The mixing time in S2 is 2 min to 10 min.

[0015] The granulation size of S3 is 10 mesh to 30 mesh.

[0016] The drying temperature in S3 is 40° C. to 70° C., and the drying time is 6 h to 48 h.

[0017] The present invention has the following beneficial effects:

[0018] (1) By introducing an organic potassium salt containing a fire extinguishing element, the coolant decomposes under the action of an aerosol generator to produce K· fire extinguishing free radicals, thereby further improving the fire extinguishing ability of the fire extinguishing device or fire extinguisher.

[0019] (2) When the coolant decomposes, it absorbs the heat released by the combustion of the aerosol generating agent, effectively reducing the temperature of the aerosol fire extinguishing agent when it is sprayed.

[0020] (3) The present invention uses all-organic components. After the coolant decomposes and settles, it still exists in the form of small molecular organic salts, which reduces the hygroscopicity of the aerosol products potassium bicarbonate, potassium carbonate and potassium hydroxide, effectively improves the electrical insulation of the sediment, and broadens the application scenarios. DETAILED DESCRIPTION

[0021] 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 used to illustrate the present invention and should not be regarded as limiting the scope of the present invention.

[0022] The organic acid potassium salt is a combination of two or more of potassium hydrogen tartrate, potassium formate, potassium cinnamate, potassium benzoate, potassium methylmalonate, potassium ethyl oxalate, potassium lactate, potassium ethylmalonate, and potassium hydroxycitrate.

[0023] The molding aid is any one of hydroxypropyl methylcellulose, ethyl cellulose, polyvinyl alcohol, phenolic resin, urea-formaldehyde resin, melamine formaldehyde resin, polyurethane, epoxy resin, and carboxymethyl cellulose.

[0024] Example 1

[0025] 70 parts of potassium cinnamate, 20 parts of potassium methylmalonate, 10 parts of potassium ethylmalonate, and 5 parts of polyvinyl alcohol.

[0026] Weigh the components according to the above proportions, mix them in a mixer for 15 minutes, then add 10% water by weight of the total material as a solvent, continue mixing for 5 minutes, and after mixing, granulate into 20-mesh particles in a granulator, dry in a drying room at 40-70°C for 6-48 hours, and then form 6mm×6mm coolant tablets.

[0027] 70g of coolant and 35g of K-type aerosol charge were assembled in the fire extinguishing device, and the fire extinguishing test and fallout electrical insulation test were carried out in accordance with the XF499.1-2010 standard.

[0028] Example 2

[0029] 60 parts of potassium hydroxycitrate, 30 parts of potassium cinnamate, 10 parts of potassium methylmalonate, and 5 parts of phenolic resin.

[0030] Weigh the components according to the above proportions, mix in a mixer for 20 to 30 minutes, then add ethanol as a solvent and continue mixing for 4 to 7 minutes. After mixing, granulate into 20-mesh granules in a granulator, dry in a drying room at 40 to 60°C for 48 to 72 hours, and then punch into 6×6 mm tablets.

[0031] 70g of coolant and 43g of K-type aerosol charge were assembled in the fire extinguishing device, and the fire extinguishing test and fallout electrical insulation test were carried out in accordance with the XF499.1-2010 standard.

[0032] Example 3

[0033] 50 parts of potassium ethylmalonate, 40 parts of potassium ethyl oxalate, 10 parts of potassium methylmalonate, and 5 parts of hydroxypropyl methylcellulose.

[0034] Weigh the components according to the above proportions, mix in a mixer for 20 to 30 minutes, then add water as a solvent and continue mixing for 4 to 7 minutes. After mixing, granulate into 20-mesh granules in a granulator, dry in a drying room at 40 to 60°C for 48 to 72 hours, and then punch into 6×6 mm tablets.

[0035] 70g of coolant and 45g of K-type aerosol charge were assembled in the fire extinguishing device, and the fire extinguishing test and the electrical insulation test of the fallout were carried out in accordance with the XF499.1-2010 standard.

[0036] Example 4

[0037] 50 parts of potassium methylmalonate, 40 parts of potassium hydroxycitrate, 10 parts of potassium ethyl oxalate, and 5 parts of hydroxypropyl methylcellulose.

[0038] Weigh the components according to the above proportions, mix in a mixer for 20 to 30 minutes, then add water as a solvent and continue mixing for 4 to 7 minutes. After mixing, granulate into 20-mesh granules in a granulator, dry in a drying room at 40 to 60°C for 48 to 72 hours, and then punch into 6×6 mm tablets.

[0039] 70g of coolant and 43g of K-type aerosol charge were assembled in the fire extinguishing device, and the fire extinguishing test and fallout electrical insulation test were carried out in accordance with the XF499.1-2010 standard.

[0040] Example 5

[0041] 50 parts of potassium cinnamate, 40 parts of potassium formate, 10 parts of potassium methylmalonate, 5 parts of hydroxypropyl methylcellulose.

[0042] Weigh the components according to the above proportions, mix in a mixer for 20 to 30 minutes, then add water as a solvent and continue mixing for 4 to 7 minutes. After mixing, granulate into 20-mesh granules in a granulator, dry in a drying room at 40 to 60°C for 48 to 72 hours, and then punch into 6×6 mm tablets.

[0043] 70g of coolant and 47g of K-type aerosol charge were assembled in the fire extinguishing device, and the fire extinguishing test and the electrical insulation test of the fallout were carried out in accordance with the XF499.1-2010 standard.

[0044] Example 6

[0045] 50 parts of potassium lactate, 40 parts of potassium ethyl oxalate, 10 parts of potassium methylmalonate, 5 parts of hydroxypropyl methylcellulose.

[0046] Weigh the components according to the above proportions, mix in a mixer for 20 to 30 minutes, then add water as a solvent and continue mixing for 4 to 7 minutes. After mixing, granulate into 20-mesh granules in a granulator, dry in a drying room at 40 to 60°C for 48 to 72 hours, and then punch into 6×6 mm tablets.

[0047] 70g of coolant and 42g of K-type aerosol charge were assembled in the fire extinguishing device, and the fire extinguishing test and the electrical insulation test of the fallout were carried out in accordance with the XF499.1-2010 standard.

[0048] Comparative Example 1

[0049] A 70g diameter 6mm aluminosilicate ceramic ball and a 100g K-type aerosol charge were assembled in the fire extinguishing device, and the fire extinguishing test and the fallout electrical insulation test were carried out in accordance with the XF499.1-2010 standard.

[0050] Comparative Example 2

[0051] 70g of existing 6mm×6mm L2 coolant and 65g of K-type aerosol charge were assembled in the fire extinguishing device, and the fire extinguishing test and the fallout electrical insulation test were carried out in accordance with the XF499.1-2010 standard.

[0052] Comparative Example 3

[0053] 60 parts of potassium benzoate, 20 parts of potassium dihydrogen phosphate, 20 parts of potassium bicarbonate, and 5 parts of polyvinyl alcohol.

[0054] Weigh the components according to the above proportions, mix in a mixer for 20 to 30 minutes, then add water as a solvent and continue mixing for 4 to 7 minutes. After mixing, granulate into 20-mesh granules in a granulator, dry in a drying room at 40 to 60°C for 48 to 72 hours, and then punch into 6×6 mm tablets.

[0055] 70g of coolant and 70g of K-type aerosol charge were assembled in the fire extinguishing device, and the fire extinguishing test and the fallout electrical insulation test were carried out in accordance with the XF499.1-2010 standard.

[0056] The characterization data and effect data of the products obtained in the above examples and comparative examples are shown in Table 1 below.

[0057] Table 1 Fire extinguishing performance characterization data of coolants with different formulations

[0058] The new coolant prepared by the present invention, when used in combination with aerosol, has significantly improved fire extinguishing ability and electrical insulation compared to traditional chemical coolants and physical coolants. The fire extinguishing ability is increased from 65-100g / m 3 , rising to 35-47g / m 3 , electrical insulation is improved from 0-20MΩ to 200-2200MΩ.

Claims

1. An easily decomposable high-performance fire extinguishing coolant for aerosol fire extinguishing agent, characterized in that: The invention comprises the following components in parts by mass: 90 to 100 parts of organic acid potassium salt and 1 to 10 parts of molding auxiliary agent.

2. The easily decomposable high-performance fire extinguishing coolant for aerosol fire extinguishing agent according to claim 1, characterized in that: The organic acid potassium salt is a combination of two or more of potassium hydrogen tartrate, potassium formate, potassium cinnamate, potassium benzoate, potassium methylmalonate, potassium ethyl oxalate, potassium lactate, potassium ethylmalonate, and potassium hydroxycitrate.

3. The easily decomposable high-performance fire extinguishing coolant for aerosol fire extinguishing agent according to claim 1, characterized in that: The molding aid is any one of hydroxypropyl methylcellulose, ethyl cellulose, polyvinyl alcohol, phenolic resin, urea-formaldehyde resin, melamine formaldehyde resin, polyurethane, epoxy resin, and carboxymethyl cellulose.

4. A method for preparing an easily decomposable high-performance fire extinguishing coolant for aerosol fire extinguishing agent, characterized in that: The following steps are involved: S1. Mix the organic acid potassium salt and the molding aid; S2. Add solvent to S1 and mix well; S3. Granulate, dry and tablet the material obtained in S2 to obtain coolant tablets.

5. The method for preparing the easily decomposable high-performance fire extinguishing coolant for aerosol fire extinguishing agent according to claim 4, characterized in that: The mixing time in S1 is 5 min to 20 min.

6. The method for preparing the easily decomposable high-performance fire extinguishing coolant for aerosol fire extinguishing agent according to claim 4, characterized in that: The solvent in S2 is one or more of water or ethanol; the mass of the added solvent is 5% to 30% of the material obtained in S1.

7. The method for preparing the easily decomposable high-performance fire extinguishing coolant for aerosol fire extinguishing agent according to claim 4, characterized in that: The mixing time in S2 is 2 min to 10 min.

8. The method for preparing the easily decomposable high-performance fire extinguishing coolant for aerosol fire extinguishing agent according to claim 4, characterized in that: The granulation size of S3 is 10 mesh to 30 mesh.

9. The method for preparing the easily decomposable high-performance fire extinguishing coolant for aerosol fire extinguishing agent according to claim 4, characterized in that: The drying temperature in S3 is 40° C. to 70° C., and the drying time is 6 h to 48 h.

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