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A fire extinguishing composition and the technology of the composition, applied in the direction of fire prevention equipment, etc., can solve the problems of fire extinguishing device product cost increase, fire extinguishing ability, volume and weight increase, etc., and achieve the effect of low price, high oxidation performance and wide source
Inactive Publication Date: 2009-03-04
SHAANXI J&R FIRE FIGHTING CO LTD
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However, the comparative experiment with potassium salt type thermal aerosol fire extinguishing ability shows that, after using strontium nitrate as the main oxidant, the fire extinguishing ability of the same composition is not as good as that of the same formula with potassium nitrate as the main oxidant, and the product cost of the fire extinguishing device has increased simultaneously. Increased size and weight
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Embodiment 1
[0051] This embodiment is the enlargement and extension of Test No. 2 in Table 1. Composition and mass percentage thereof are in this embodiment:
[0052] Magnesium nitrate 50%~60%
[0053] Potassium ferricyanide 7%~10%
[0054] Dicyandiamide 20%~30%
[0055] Magnesium carbonate 5%~20%
[0056] Phenolic resin 2%~5%
[0057] Compared with the performance of the test No. 1 composition in Table 1, the performance of the No. 2 composition is obviously superior to that of Composition 1, with high fire extinguishing efficiency and no corrosion.
Embodiment 2
[0059] Embodiment 2 is the enlargement and expansion of No. 4 in Table 1. Composition and mass percentage thereof are in this embodiment:
[0060] Magnesium nitrate 40%~55%
[0061] Guanidine nitrate 40%~45%
[0062] Magnesium carbonate 5%~15%
[0063] Phenolic resin 2%~5%
[0064] This embodiment is obviously better than the comparative example of No. 3: the burning rate is not increased, and the combustion deposits have no corrosion; the fire extinguishing ability is equivalent to that of No. 3.
Embodiment 3
[0066] This embodiment is the enlargement and expansion of No. 6 in Table 1. Composition and mass percentage thereof are in this embodiment:
[0067] Potassium nitrate 10%~30%
[0068] Magnesium nitrate 30%~40%
[0069] Guanidine nitrate 20%~40%
[0070] Magnesium carbonate 10%~20%
[0071] Aluminum powder 2%~8%
[0072] Toner 0%~5%
[0073] Phenolic resin 2%~5%
[0074] Compared with the comparative example of No. 5, the composition shows that the same formulation of magnesium nitrate and potassium nitrate has similar corrosion damage and toxicity; but the burning rate is accelerated, and the fire extinguishing ability is improved.
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Abstract
The invention provides ''a hot aerosol fire-extinguishing composition'' and relates to an oxidative magnesium salt hot aerosol fire-extinguishing composition represented by anhydrous magnesium nitrate. The composition is characterized in that the composition can be magnesium nitrate, magnesium carbonate, or other magnesium salt, and can also be a compound of magnesium nitrate, or other magnesium salt with potassium nitrate, strontium nitrate, or other potassium salt or strontium salt; a reducer can be one of or the combination of a plurality of ammonium carbamidine, dicyandiamide, red prussiate of potash, formamine, triazole, and tetrazole; a capability improver can be magnesium carbonate, manganous carbonate, aluminium powder, powdered carbon, magnesium hydrate, metal oxide, etc.; and the bond adopts phenolic resin, etc. The preparation of the magnesium salt comprises the continuous steps: medium temperature and low pressure dehydration, spray under the protection of nitrogen-oxygen flow or ultrafine grinding of grinded colloid, and microencapsulated hydrophobic treatment, etc. Compared with the prior art, the fire-extinguishing composition has the advantages of low price, extensive source, fire-extinguishing capability of K-type composition, and low causticity and toxicity of the ultimate product of combustion.
Description
technical field [0001] The invention belongs to the technical field of fire extinguishing compositions, and relates to a thermal aerosol fire extinguishing composition, in particular to a thermal aerosol fire extinguishing composition with an oxidizing magnesium salt represented by anhydrous magnesium nitrate as an oxidant. technical background [0002] Since pyrotechnic aerosols began to be used in the field of fire suppression and explosion suppression in the 1990s, the research and application of fire extinguishing compositions has gone through two stages of development: namely, potassium salts with oxidizing potassium salts such as potassium nitrate, potassium chlorate, and potassium perchlorate as oxidants. 盐型热气溶胶灭火组合物阶段,如专利UA7773;WO2005023370;US20020121622;US20010011567;DE19915352;US5881209;RU2230726;RU2184587;US2214848;RU2157271;RU2156310;RU2121857;RU2108124;RU2105756(KClO3);RU2107524;RU2091106等报导的钾盐 CN1166996A; CN1739820A; CN13865541 reported strontium salt type hot ae...
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