CN116515465A - Chemical coolant for aerosol fire extinguishing agent and preparation method thereof - Google Patents
Chemical coolant for aerosol fire extinguishing agent and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0092—Gaseous extinguishing substances, e.g. liquefied gases, carbon dioxide snow
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/06—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires containing gas-producing, chemically-reactive components
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Abstract
The invention discloses a chemical coolant for aerosol fire extinguishing agent and a preparation method thereof, which is a coolant applicable to K-type aerosol fire extinguishing agent prepared by mixing organic acid, carbonate or basic carbonate, a binder and a release agent by utilizing a neutralization reaction principle; the coolant which is prepared by mixing organic acid, carbonate or basic carbonate, alkaline organic matters, a binder and a release agent and is suitable for the S-type aerosol fire extinguishing agent can effectively neutralize strong alkaline matters generated when different types of aerosol fire extinguishing agents extinguish fire, so that potassium salt with neutral pH and weak hygroscopicity is generated, the corrosiveness of the aerosol fire extinguishing agent is effectively reduced, and the potassium salt with low hygroscopicity is not ionized, thereby presenting strong electrical insulation. The invention not only effectively reduces the temperature of the nozzle of the fire extinguishing device, but also realizes the effects of high insulation and low corrosion of sediment and expands the application range by using the coolant on the premise of not changing the raw material components and the fire extinguishing performance of the aerosol fire extinguishing agent.
Description
Technical Field
The invention belongs to the technical field of hot aerosol fire extinguishing coolants, and particularly relates to a chemical coolant for an aerosol fire extinguishing agent and a preparation method thereof.
Background
Aerosol fire extinguishing agents are a new type of fire extinguishing agent developed in the last forty years, and are a solid mixture of an oxidizing agent, a reducing agent, a combustion rate control and a binder. The aerosol fire extinguishing agents commonly used at present are mainly classified into K type and S type, the K type aerosol fire extinguishing agents are also called potassium salt fire extinguishing agents, and the K type aerosol fire extinguishing agents are the second stage of the aerosol fire extinguishing agent technology development, and mainly utilize nitrate, chlorate and perchlorate of potassium as main oxidants. The S-type aerosol is a fire extinguishing agent of a novel composite oxidant taking strontium salt as a main oxidant and potassium nitrate as an auxiliary oxidant.
The K-type aerosol fire extinguishing agent has the advantage of high fire extinguishing efficiency, the K-type aerosol fire extinguishing agent mainly captures free radicals through potassium active particles, the potassium can easily react with HO, H, O and other free radicals to reduce the concentration of active free radicals in a fire scene, but the fire extinguishing product mainly comprises CO 2 、N 2 And K 2 O and K 2 CO 3 Etc., wherein K 2 O has strong hygroscopicity and reacts with water to generate strong alkali KOH; in addition, K 2 CO 3 Also has strong hydroscopic property, and the KOH and K after hydroscopic property 2 CO 3 Will ionize to form OH - 、CO 3 2- And K + The plasma has stronger conductivity and corrosiveness. In the use process, firstly, potassium salt is taken as oxidant, the thermal aerosol release product has stronger conductivity and can damage charged equipment, and secondly, KOH and K 2 CO 3 The strong corrosiveness has a corrosiveness on metal parts, so that the insulativity of a circuit board of a precise instrument is damaged, certain corrosiveness is caused on cultural relics and paper documents, application places are greatly limited, and market share is gradually reduced. The S-type aerosol fire extinguishing agent spraying material is mainly formed by decomposing strontium nitrate into SrO, sr (OH) 2 、SrCO 3 Etc., release the productThe corrosiveness and electrical insulation of the product are greatly improved relative to K-type aerosol, but the release product still has certain corrosiveness and electrical conductivity. Therefore, there is a strong need for a substance or method that can solve the corrosiveness and conductivity of aerosol fire extinguishing agents, and the current thought is mainly to conduct high-insulation and low-corrosion research based on aerosol fire extinguishing agents or based on matched used coolants.
Chinese patent CN114350326a discloses a coolant and its preparation method, temperature-sensitive flocculation gel, aerosol fire extinguisher, comprising organic acid, organic polyol, and adhesive, wherein the coolant can absorb heat to reduce the nozzle temperature of the aerosol fire extinguisher in the process of decomposition or sublimation, and can decompose or sublimate by heating to generate temperature-sensitive flocculation gel, when the temperature of the temperature-sensitive flocculation gel is lower than the temperature-sensitive response temperature, the fire extinguishing particles are coated to avoid secondary damage to the protecting object caused by strong electrolyte generated by contact of the fire extinguishing particles with water in the air; when the temperature of the temperature-sensitive flocculation gel is higher than the temperature-sensitive response temperature, the fire extinguishing particles can be released to realize fire extinguishment. Chinese patent CN108992827a discloses a preparation method of insulating and corrosion-resistant aerosol fire extinguishing agent, which uses nano cellulose, sodium lignosulfonate, ethylenediamine and other substances to react and mix with potassium nitrate, strontium nitrate and other substances to prepare the insulating and corrosion-resistant aerosol fire extinguishing agent, so as to ensure high heat transfer efficiency between aerosols and effectively reduce corrosion of solid particles to metal equipment after fire extinguishment. Chinese patent CN106621165B discloses a low-temperature S-type aerosol fire extinguishing agent, wherein the regulator adopts potassium oxalate, magnesium powder and hexamethylenetetramine, which ensures corrosiveness of the co-fired product and has excellent insulating property.
However, when the aerosol fire extinguishing agent is improved on the basis of the formula, the high insulation and low corrosion performance of the aerosol fire extinguishing agent are obtained, the fire extinguishing efficiency is ensured to be unchanged, and the difficulty that the fire extinguishing efficiency is not affected is also overcome by adopting the coating concept to treat the aerosol fire extinguishing particles, so that the purpose of realizing the high insulation and low corrosion is achieved by preparing the agent independent of the aerosol fire extinguishing agent and the spraying product thereof, the application range of the aerosol fire extinguishing agent is widened, and the aerosol fire extinguishing agent is a problem to be solved in the field of aerosol fire extinguishing agents.
Disclosure of Invention
In order to solve the technical problems, the invention provides a coolant for aerosol fire extinguishing agent and a preparation method thereof, which are characterized in that organic acid, carbonate or basic carbonate, a binder and a release agent are used in combination, and the neutralization reaction principle is utilized to neutralize the sprayed strong alkaline substance of the aerosol fire extinguishing agent, so that the cooling effect of an aerosol nozzle is ensured, the corrosiveness is reduced, and the insulativity is improved.
The technical scheme adopted by the invention is as follows:
a chemical coolant for aerosol fire-extinguishing agent is prepared from organic acid (30-70 wt.%), carbonate or basic carbonate (30-70), adhesive (1-10) and demoulding agent (1-10).
Preferably, the chemical coolant further comprises 10% -20% basic organics.
Further preferably, the basic organic substance is any one of dicyandiamide, melamine, o-phenylenediamine, m-phenylenediamine, and p-phenylenediamine.
Preferably, the organic acid is any one of cinnamic acid, benzoic acid, terephthalic acid, phthalic acid, citric acid, oxalic acid, tartaric acid, ethylenediamine tetraacetic acid, lauric acid, salicylic acid, and sorbic acid.
Preferably, the carbonate is any one of copper carbonate, manganese carbonate, magnesium carbonate, zinc carbonate, calcium carbonate, strontium carbonate and barium carbonate; the basic carbonate is any one of basic copper carbonate, basic zinc carbonate and basic magnesium carbonate.
Preferably, the binder is any one of ethyl cellulose, phenolic resin, epoxy resin, hydroxypropyl methylcellulose, polyvinyl alcohol and dextrin.
Preferably, the release agent is any one of magnesium stearate, zinc stearate, molybdenum disulfide, tungsten disulfide and graphite.
The invention also provides a preparation method of the coolant for the aerosol fire extinguishing agent, which specifically comprises the following steps:
(1) (1) weighing the raw materials in the claims 1 or 2 according to a proportion, mixing the raw materials with a screen for 2-5 times, and uniformly mixing to obtain a solid mixture;
(2) Adding methanol into the solid mixture, mixing wet materials, and granulating by a screen to obtain wet coolant particles;
(3) Drying the wet coolant particles, and sieving the wet coolant particles for the second time to obtain dry coolant particles;
(4) The dry coolant particles were pressed into a sheet shape to obtain a coolant sheet finished product (coolant shape is a cylinder, diameter is 6mm, and height is 5.5 mm).
Preferably, the mesh diameter of the screen mesh in the step (1) is 100 meshes; the mesh diameter of the screen mesh in the step (2) and the step (3) is 20 meshes.
Preferably, the drying conditions in step (3) are 55-65deg.C for 10-15h.
The invention has the beneficial effects that: the invention is based on that the release product of aerosol fire extinguishing agent is easy to absorb moisture to form K with strong corrosiveness 2 O and K 2 CO 3 The substances are added with a coolant containing acidic substances in an outlet channel of the aerosol fire extinguishing agent through an acid-base neutralization reaction principle to enable the coolant to react with the sprayed product to generate neutral potassium salt substances, and the neutral potassium salt substances have very weak hygroscopicity, so that ionization does not occur and very strong electrical insulation is shown; and the neutral potassium salt with very weak hygroscopicity is difficult to electrochemically corrode on the metal surface, so that the corrosiveness of the aerosol fire extinguishing agent is reduced. The invention only changes the type of potassium salt, does not change the concentration of potassium and reduces the fire extinguishing capability of aerosol, and additionally adds the cooling agent, thereby not only realizing the reduction of the temperature of the nozzle of the fire extinguishing device, but also expanding the application range of the aerosol fire extinguishing agent.
Drawings
Fig. 1 is a graph of copper plates with different corrosion degrees, wherein a is a graph of copper plate with slight corrosion of the coolant prepared in example 1 after the spraying experiment, B is a graph of copper plate with moderate corrosion of the coolant prepared in comparative example 2 after the spraying experiment, and C is a graph of copper plate with severe corrosion of the coolant prepared in comparative example 3 after the spraying experiment.
Detailed Description
The technical solution of the present invention will be further explained below with reference to the accompanying drawings and specific embodiments, and it should be noted that the following embodiments are only preferred embodiments of the present invention, and not further limiting the present invention, and the scope of the present invention is defined by the claims. Modifications and equivalents of the claims to be within the scope of the invention may be made by those skilled in the art without making any inventive effort.
Example 1 Coolant suitable for use in K-type aerosol fire suppressant
(1) Mixing 50% of cinnamic acid, 41% of basic copper carbonate, 4% of magnesium stearate and 5% of phenolic resin, sieving and dry-mixing for three times by using a 100-mesh screen, and uniformly mixing to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles;
(4) Finally, the dry coolant particles were added to a tablet press and pressed at 10MPa to obtain coolant tablets having a diameter of 6mm and a thickness of 5.5 mm.
Example 2 Coolant suitable for use in K-type aerosol fire suppressants
(1) Mixing 50% of salicylic acid, 41% of basic magnesium carbonate, 4% of zinc stearate and 5% of ethyl cellulose, sieving and dry-mixing for three times by using a 100-mesh screen, and uniformly mixing to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles;
(4) Finally, the dry coolant particles were added to a tablet press and pressed at 10MPa to obtain coolant tablets having a diameter of 6mm and a thickness of 5.5 mm.
Example 3 Coolant suitable for use in K-type aerosol fire suppressants
(1) Mixing 40% of phthalic acid, 51% of basic zinc carbonate, 4% of molybdenum disulfide and 5% of epoxy resin, sieving and dry-mixing for three times by using a 100-mesh screen, and uniformly mixing to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles;
(4) Finally, the dry coolant particles were added to a tablet press and pressed at 10MPa to obtain coolant tablets having a diameter of 6mm and a thickness of 5.5 mm.
Example 4 Coolant suitable for use in K-type aerosol fire suppressants
(1) Mixing 60% of benzoic acid, 31% of basic magnesium carbonate, 4% of tungsten disulfide and 5% of hydroxypropyl methyl cellulose, sieving and dry-mixing the mixture for three times by using a 100-mesh screen, and uniformly mixing the mixture to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles (the volatile content is lower than 1%);
(4) Finally, the dry coolant particles were added to a tablet press and pressed at 10MPa to obtain coolant tablets having a diameter of 6mm and a thickness of 5.5 mm.
Example 5 Coolant suitable for use in K-type aerosol fire suppressants
(1) Mixing 60% of citric acid, 31% of manganese carbonate, 4% of graphite and 5% of polyvinyl alcohol, sieving and dry-mixing for three times by using a 100-mesh screen, and uniformly mixing to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles (the volatile content is lower than 1%);
(4) Finally, the dry coolant particles were added to a tablet press and pressed at 10MPa to obtain coolant tablets having a diameter of 6mm and a thickness of 5.5 mm.
Example 6 Coolant suitable for use in S-aerosol fire suppressant
(1) Mixing 50% of cinnamic acid, 31% of basic copper carbonate, 10% of dicyandiamide, 4% of magnesium stearate and 5% of phenolic resin, sieving and dry-mixing for three times by using a 100-mesh screen, and uniformly mixing to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles;
(4) Finally, the dry coolant particles were added to a tablet press and pressed at 10MPa to obtain coolant tablets having a diameter of 6mm and a thickness of 5.5 mm.
Example 7 Coolant suitable for use in S-aerosol fire suppressant
(1) Mixing 35% of phthalic acid, 46% of basic zinc carbonate, 10% of melamine, 4% of magnesium stearate and 5% of ethyl cellulose, sieving and dry mixing for three times by using a 100-mesh screen, and uniformly mixing to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles;
(4) Finally, the dry coolant particles were added to a tablet press and pressed at 10MPa to obtain coolant tablets having a diameter of 6mm and a thickness of 5.5 mm.
Example 8 Coolant suitable for use with S-type aerosol fire suppressant
(1) Mixing 50% of salicylic acid, 31% of basic magnesium carbonate, 10% of dicyandiamide, 4% of magnesium stearate and 5% of ethyl cellulose, sieving and dry mixing for three times by using a 100-mesh screen, and uniformly mixing to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles;
(4) Finally, the dry coolant particles were added to a tablet press and pressed at 10MPa to give coolant tablets having a diameter of 6mm and a thickness of 5.5 mm.
Example 9 Coolant suitable for use with S-type aerosol fire suppressant
(1) Mixing 45% of ethylenediamine tetraacetic acid, 31% of copper carbonate, 15% of o-phenylenediamine, 4% of zinc stearate and 5% of dextrin, sieving with a 100-mesh screen for three times, and dry mixing, and uniformly mixing to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles;
(4) Finally, the dry coolant particles were added to a tablet press and pressed at 10MPa to obtain coolant tablets having a diameter of 6mm and a thickness of 5.5 mm.
Example 10 Coolant suitable for use with S-type aerosol fire suppressant
(1) Mixing 51% of lauric acid, 30% of strontium carbonate, 10% of m-phenylenediamine, 4% of molybdenum disulfide and 5% of ethyl cellulose, sieving and dry mixing for three times by using a 100-mesh screen, and uniformly mixing to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles;
(4) Finally, the dry coolant particles were added to a tablet press and pressed at 10MPa to obtain coolant tablets having a diameter of 6mm and a thickness of 5.5 mm.
Example 11 Coolant suitable for use with S-type aerosol fire suppressant
(1) Mixing 41% of tartaric acid, 40% of barium carbonate, 10% of p-phenylenediamine, 4% of tungsten disulfide and 5% of ethyl cellulose, sieving and dry mixing the mixture for three times by using a 100-mesh screen, and uniformly mixing to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles (the volatile content is lower than 1%);
(4) Finally, the dry coolant granules were fed into a tablet press and pressed at 10MPa to obtain coolant tablets (cylindrical granules) having a diameter of 6mm and a thickness of 5.5 mm.
Comparative example 1
(1) Mixing 91% of salicylic acid, 4% of magnesium stearate and 5% of ethyl cellulose, sieving with a 100-mesh screen for three times, and dry-mixing to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles;
(4) Finally, the dry coolant particles were added to a tablet press and pressed at 10MPa to obtain coolant tablets having a diameter of 6mm and a thickness of 5.5 mm.
Comparative example 2
(1) Sieving 91% dicyandiamide, 4% magnesium stearate and 5% ethyl cellulose with a 100-mesh screen for three times, and dry mixing uniformly to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles (the volatile content is lower than 1%);
(4) Finally, the dry coolant particles were added to a tablet press and pressed at 10MPa to give coolant tablets (cylindrical particles) having a diameter of 6mm and a thickness of 5.5mm,
comparative example 3
(1) Mixing 91% of basic magnesium carbonate, 4% of magnesium stearate and 5% of ethyl cellulose, sieving with a 100-mesh screen for three times, and dry-mixing uniformly to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles;
(4) Finally, the dry coolant particles were added to a tablet press and pressed at 10MPa to obtain coolant tablets having a diameter of 6mm and a thickness of 5.5 mm.
Comparative example 4
(1) Taking 71% salicylic acid, 20% dicyandiamide, 4% magnesium stearate and 5% ethyl cellulose, sieving and dry mixing the materials with a 100-mesh screen for three times, and uniformly mixing the materials to obtain a solid mixture;
(2) Adding 14% absolute methanol into the solid mixture obtained in the step (1), mixing wet materials, and granulating the mixed wet materials through a 20-mesh screen to obtain wet coolant particles;
(3) Drying the obtained wet coolant particles at 60 ℃ for 12 hours until the volatile content is lower than 1%, and secondarily sieving the wet coolant particles through a 20-mesh screen to obtain dry coolant particles;
(4) Finally, the dry coolant particles were added to a tablet press and pressed at 10MPa to obtain coolant tablets having a diameter of 6mm and a thickness of 5.5 mm.
Comparative example 5
Ceramic spheres of phi 6 (purchased from the chemical filler company of the middle school of the duckweed city) are directly used as the physical coolant of the K-type aerosol fire extinguishing agent.
Comparative example 6
Ceramic spheres of phi 6 (purchased from the chemical filler company of the middle school of the duckweed city) are directly used as the physical coolant of the S-type aerosol fire extinguishing agent.
Comparative example 6
Result verification
70g of the coolants prepared in examples 1 to 5, comparative example 1, example 2 and comparative example 5 were mixed with 50g K type aerosols (homemade, 73% KNO 3 The +27% reducing agent) coated grain (diameter 32mm, height) consisted of an aerosol fire extinguisher, the solid sediment insulation strength was measured according to the 7.30 test in XF 499.1-2010, the aqueous pH of the aerosol fire extinguisher was measured according to the 7.31 test, the solid sediment corrosiveness was measured according to the 7.32 test method, and the results are shown in table 1.
70g of the coolants prepared in examples 6-11, comparative example 2, comparative example 4 and comparative example 6 were mixed with 50g S type aerosols (homemade, 43% KNO 3 +30％Sr(NO 3 ) 2 +27% reducing agent) coated grain to form an aerosol fire extinguishing apparatus, and electrical insulation, corrosiveness and pH were tested according to the above-described experimental method, and the results are shown in table 1.
TABLE 1 influence of different coolants on the electrical insulation, corrosiveness, pH and discharge temperature of aerosol fire extinguishing agents
As can be seen from the table above: the K-type and S-type aerosol release products of comparative examples 5 and 6, in which ceramic balls were used as the coolant, were not ideal in electrical insulation and corrosiveness, and particularly the K-type aerosols were very strong in corrosiveness and conductivity, and the sediment solutions thereof were alkaline.
The sediment is more corrosive and has relatively better electrical insulation after the K-type aerosol is combined with an organic acid coolant (comparative example 1) and the S-type aerosol is combined with a basic carbonate coolant (comparative example 2). While the organic acid-carbonate coolant in combination with the K-type aerosol (examples 1-5) and the organic acid-organic amine-carbonate in combination with the S-type aerosol (examples 6-11) exhibited good electrical insulation and very weak corrosiveness of the emissions after use, and the acid-base of the sediment solution was nearly neutral. From the above results, it can be seen that the coolant can solve the corrosiveness and electrical insulation of the aerosol fire extinguishing agent. And the composition of the coolant can be adjusted according to the type of aerosol to satisfy the low corrosion and high insulation properties of the sediment. An appropriate amount of a basic organic amine is added to the K-type aerosol coolant to weaken the acidity of the coolant, so that it can be applied to S-type aerosols.
Claims (10)
1. A chemical coolant for an aerosol fire suppression agent, characterized by: the chemical coolant consists of 30-70% of organic acid, 30-70% of carbonate or basic carbonate, 1-10% of binder and 1-10% of release agent.
2. A chemical coolant for aerosol fire suppression agents as recited in claim 1, wherein: the chemical coolant also comprises 10-20% of alkaline organic matters.
3. A chemical coolant for aerosol fire suppression agents as recited in claim 2, wherein: the alkaline organic matter is any one of dicyandiamide, melamine, o-phenylenediamine, m-phenylenediamine and p-phenylenediamine.
4. A chemical coolant for aerosol fire suppression agents as recited in claim 1, wherein: the organic acid is any one of cinnamic acid, benzoic acid, terephthalic acid, phthalic acid, citric acid, oxalic acid, tartaric acid, ethylenediamine tetraacetic acid, lauric acid, salicylic acid and sorbic acid.
5. A chemical coolant for aerosol fire suppression agents as recited in claim 1, wherein: the carbonate is any one of copper carbonate, manganese carbonate, magnesium carbonate, zinc carbonate, calcium carbonate, strontium carbonate and barium carbonate; the basic carbonate is any one of basic copper carbonate, basic zinc carbonate and basic magnesium carbonate.
6. A chemical coolant for aerosol fire suppression agents as recited in claim 1, wherein: the binder is any one of ethyl cellulose, phenolic resin, epoxy resin, hydroxypropyl methyl cellulose, polyvinyl alcohol and dextrin.
7. A chemical coolant for aerosol fire suppression agents as recited in claim 1, wherein: the release agent is any one of magnesium stearate, zinc stearate, molybdenum disulfide, tungsten disulfide and graphite.
8. A preparation method of a chemical coolant for aerosol fire extinguishing agent is characterized in that: the method comprises the following steps:
(1) Weighing the raw materials in claim 1 or 2 according to a proportion, mixing with a screen for 2-5 times, and uniformly mixing to obtain a solid mixture;
(2) Adding methanol into the solid mixture, mixing wet materials, and granulating by a screen to obtain wet coolant particles;
(3) Drying the wet coolant particles, and sieving the wet coolant particles for the second time to obtain dry coolant particles;
(4) And pressing the dry coolant particles into a sheet shape to obtain a coolant sheet finished product.
9. The method of manufacturing according to claim 8, wherein: the mesh diameter of the screen mesh in the step (1) is 100 meshes; the mesh diameter of the screen mesh in the step (2) and the step (3) is 20 meshes.
10. The method of manufacturing according to claim 8, wherein: and (3) drying at 55-65 ℃ for 10-15h under the drying condition.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310381299.9A CN116515465A (en) | 2023-04-11 | 2023-04-11 | Chemical coolant for aerosol fire extinguishing agent and preparation method thereof |
| PCT/CN2023/092038 WO2024212282A1 (en) | 2023-04-11 | 2023-05-04 | Chemical coolant for aerosol fire-extinguishing agent and preparation method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310381299.9A CN116515465A (en) | 2023-04-11 | 2023-04-11 | Chemical coolant for aerosol fire extinguishing agent and preparation method thereof |
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| CN116515465A true CN116515465A (en) | 2023-08-01 |
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| CN202310381299.9A Pending CN116515465A (en) | 2023-04-11 | 2023-04-11 | Chemical coolant for aerosol fire extinguishing agent and preparation method thereof |
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| CN (1) | CN116515465A (en) |
| WO (1) | WO2024212282A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024212282A1 (en) * | 2023-04-11 | 2024-10-17 | 湖北及安盾消防科技有限公司 | Chemical coolant for aerosol fire-extinguishing agent and preparation method therefor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2120318C1 (en) * | 1996-06-04 | 1998-10-20 | Федеральный центр двойных технологий "Союз" | Composition for cooling fire-extinguishing aerosol and method of its production |
| CN1143698C (en) * | 1999-08-16 | 2004-03-31 | 西安坚瑞化工有限责任公司 | Formula and preparation process of cooling antiflame agent |
| US20120273714A1 (en) * | 2010-01-19 | 2012-11-01 | Shaanxi J & R Fire Fighting Co., Ltd. | Catalytic chemical coolant for thermal aerosol and a preparation method thereof |
| CN101757760B (en) * | 2010-01-19 | 2012-06-27 | 陕西坚瑞消防股份有限公司 | Catalytic chemical coolant for hot aerosol and preparation method thereof |
| KR100968883B1 (en) * | 2010-02-26 | 2010-07-09 | 고려화공 주식회사 | Refrigerant composition having high heat absorption capability and low water absorption capability |
| CN114350326B (en) * | 2022-01-14 | 2024-02-02 | 湖北及安盾消防科技有限公司 | Coolant and preparation method thereof, temperature-sensitive flocculation gel and aerosol fire extinguishing device |
| CN116515465A (en) * | 2023-04-11 | 2023-08-01 | 湖北及安盾消防科技有限公司 | Chemical coolant for aerosol fire extinguishing agent and preparation method thereof |
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2023
- 2023-04-11 CN CN202310381299.9A patent/CN116515465A/en active Pending
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024212282A1 (en) * | 2023-04-11 | 2024-10-17 | 湖北及安盾消防科技有限公司 | Chemical coolant for aerosol fire-extinguishing agent and preparation method therefor |
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| WO2024212282A1 (en) | 2024-10-17 |
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