CN107029377A - One kind concentration high-efficiency fire-extinguishant and preparation method thereof - Google Patents
One kind concentration high-efficiency fire-extinguishant and preparation method thereof Download PDFInfo
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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
- A62D1/0071—Foams
- A62D1/0078—Foams containing proteins or protein derivatives
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Abstract
High-efficiency fire-extinguishant and preparation method thereof is concentrated the invention belongs to chemical material field, more particularly to one kind.The concentration high-efficiency fire-extinguishant that the present invention is provided, its raw material is as follows：Urea, ammonium chloride, ammonium sulfate, sodium acid carbonate, potassium carbonate, sodium metasilicate gel solution, ethylene glycol, APP, surfactant, foaming agent, water.Extinguishing chemical raw material is few, cost is low, fire extinguishing grade is high, applied widely, anti-resume combustion excellent performance；The extinguishing chemical freezing point is low, is adapted to the low temperature environment of the Northeast.Because the extinguishing chemical is enrichment stage, preceding and water is being used with 1:16 ratio mixes can go out 2A and 89B fire, so routine preservation occupies little space, and it is miscible with water, the state of homogeneous solution can be reached after mixing immediately.
Description
Technical field
High-efficiency fire-extinguishant and preparation method thereof is concentrated the invention belongs to chemical material field, more particularly to one kind.
Background technology
Fire is the calamity of today's society one, and almost there is fire in the whole nation daily, often results in the huge of lives and properties
Big loss.How to stamp out a fire rapidly, life is saved as far as possible, reduce economic loss, be all the common people and attention from government all the time
Focus.With developing rapidly for industry, countries in the world are increasing to the degree of dependence of crude oil and fuel oil, various oil product storage tanks
Also more and more, the accident of fire occurs for crude oil, fuel oil and flammable liquid chemicals on year-on-year basis also in increase.Once flammable liquid
Generation fire, the intensity of a fire is difficult control.
At present, relatively effective extinguishing method is exactly liquid surface one layer of barrier film of formation in burning.Existing extinguishing chemical
Species mainly have water, fire foam, carbon dioxide extinguishing agent, powder extinguishing agent and fire-fighting sand etc., these extinguishing chemicals for
The fire that flammable liquid of putting out a fire to save life and property triggers all has deficiency.Wherein, water is conventional extinguishing chemical, but the density that cannot be used for putting out a fire to save life and property is small
The fire triggered in water or water insoluble the flammable liquid such as oil product such as gasoline, kerosene, diesel oil, is more than the flammable of water for density
Liquid, although water can float on its surface, the surface tension of water is small and without viscosity, and evaporation rate is fast in high temperature environments,
It is difficult to form separation layer on flammable liquid surface, although also have developed the low-tension that can be swum on flammable liquid surface
Water, but it is not stabilising system, it is impossible to float, and evaporate soon in high temperature environments totally, remaining one for a long time
Divide water to be deposited to bottom, do not have the effect of fire extinguishing；Fire foam can form froth bed on combustion of liquid surface, will fire
Liquid-to-air isolation is burnt, but its intermolecular interaction force is small, froth bed is easy to rupture in high temperature environments,
So that flame, which is scurried out, causes resume combustion, while fire foam is not easily cleaned after being unsuitable for conventional a large amount of storages, calamity；Carbon dioxide
Extinguishing chemical needs to be stored in steel cylinder after compressing and liquefying, and is limited by storage container capacity, carbon dioxide extinguishing agent is not suitable for greatly
Amount storage, is only used for the initial stage of fire or small-sized fire；Fire-fighting sand should not be carried and store the substantial amounts of ground space of needs,
So being adapted only to the initial stage of fire or small-sized fire, while fire-fighting sand is not easily cleaned after calamity；Existing BC powder extinguishing agents
Fire extinguishing base-material is mainly sodium acid carbonate, and it is fire extinguishing base-material also to have with saleratus, potassium chloride, sodium chloride, potassium sulfate, ammonium sulfate etc.
Formula, sprayed into sodium acid carbonate etc. for the existing BC powder extinguishing agents of fire extinguishing base-material behind the scene of a fire mainly by combustible and sky
Oxygen in gas is kept apart to realize the purpose of fire extinguishing, and this fire-fighting principle needs to use more extinguishing chemical to put out a fire,
Therefore, existing BC powder extinguishing agents generally existing fire extinguishing effectiveness is low, seriously polluted problem.
In summary, being badly in need of a kind of fire extinguishing of research, grade is high, applied widely, anti-resume combustion excellent performance concentration high-effect fire-extinguishing
Agent.
The content of the invention
For above-mentioned purpose, the invention provides one kind concentration high-efficiency fire-extinguishant and preparation method thereof, prepared by this method
Extinguishing chemical raw material is few, cost is low, fire extinguishing grade is high, applied widely, anti-resume combustion excellent performance；The extinguishing chemical freezing point is low, is adapted to
The low temperature environment of the Northeast.Because the extinguishing chemical is enrichment stage, preceding and water is being used with 1:16 ratio mixes the 2A that can go out
With 89B fire, so routine preservation occupies little space, and miscible with water, the state of homogeneous solution can be reached after mixing immediately.This
Invention mainly makes up the fire foam that current fire fighting truck is used, can be with the unconditional foam for replacing using on existing fire fighting truck
Extinguishing chemical.
To achieve these goals, the concentration high-efficiency fire-extinguishant that the present invention is provided, its raw material is as follows：Urea, ammonium chloride, sulphur
Sour ammonium, sodium acid carbonate, potassium carbonate, silicic acid sodium gel, ethylene glycol, APP, surfactant, foaming agent, water.
The weight of the urea is the 30%-60% of the weight of the water；The weight of the ammonium chloride is the weight of the water
15%-40%；The weight of the ammonium sulfate is the 5%-25% of the weight of the water；The weight of the sodium acid carbonate is the water
The 2%-7% of weight；The weight of the potassium carbonate is the 3%-5% of the weight of the water；The weight of the silicic acid sodium gel is described
The 1%-3.5% of the weight of water；The weight of the APP is the 1%-5% of the weight of the water；The weight of the ethylene glycol is
The 20%-40% of the weight of the water；The weight of the surfactant is the 1%-15% of the weight of the water；The foaming agent
Weight is the 1%-15% of the weight of the water.
To achieve these goals, the preparation method for the concentration high-efficiency fire-extinguishant that the present invention is provided, specifically includes following step
Suddenly：Water is carried out to be heated to 60 DEG C -70 DEG C；Urea, ammonium chloride, ammonium sulfate are added into the water, and carries out first time stirring；
Above-mentioned solution is cooled to 30 DEG C -40 DEG C；Add sodium acid carbonate, potassium carbonate, silicic acid sodium gel, APP and carry out second
Stirring；Add ethylene glycol and carry out third time stirring；Add surfactant and foaming agent carries out the 4th stirring.
Described surfactant is fluorine-containing surfactant, is specially purchased in the production of Shanghai Hui Ping Chemical Co., Ltd.s
Capstone1157 surfactants；Described foaming agent is purchased from the Fchj-50 of Yangzhou Chenhua New Materials Co., Ltd.
The foaming agent of type.
The time of the first time stirring is not less than 20min；The time of second of stirring is not less than 40min；It is described
The time of third time stirring is not less than 40min；The time of the 4th time described stirring is not less than 40min.
Described speed of agitator is 60r/min.
Compared with prior art, remarkable result of the invention.
The raw material sources of the present invention enrich, and are adapted to industrialized production；And blow-off velocity is fast, not resume combustion after fire extinguishing, to people
Body and environment are without destruction.Most of water-based extinguishing agent applied on the market at present is developed for a kind of fire type, and
Our this concentrated type water-based extinguishing agent is developed for A classes fire, B classes fire, C classes fire and E classes fire, can be with general；This public affairs
The concentration high-efficiency fire-extinguishant of department's research and development belongs to water-based extinguishing agent, and the water-based extinguishing agent that the country is used at present depend on it is pure enter
Mouthful, price control in 200 yuan/kg, and our cost be its 1/10th；From extinguishing property, existing Kazakhstan dragon is gone out
The extinguishing property of fiery agent is undoubtedly extraordinary, is even better than most of substitutes in the market, but right just because of it
The heavy damage of environment, and by eliminating, and our this concentration high-efficiency fire-extinguishants to environment and personnel without any injury,
On the basis of equal extinguishing effect it is more environmentally-friendly with it is safe.Therefore, extinguishing chemical security of the invention and environmental-protecting performance be excellent, same to state
The extinguishing chemical that international standard integrates with, meets the development trend of extinguishing chemical.
The present invention enables comburant to cool rapidly, and reduce resume combustion probability using above can be good because of its water-retaining property.So
Fatal poison gas can be reduced and high-temperature expansion produces thick smoke, burning area is reduced, lower damage to property.Can not be substituted three are big excellent
Point：First, 100% is environment-protecting and non-poisonous, without subsequently in process problem, using nontoxic raw material as base material, for natural, ecological and people
Body does not all result in any destruction with poisoning.All kinds of water system fire-extinguishing apparatus are applicable to, and are not limited by special installation；2nd, wink
Between be dissolved in water, be not in isolation, layering, the phenomenon of precipitation without the water-soluble process of power-assisted；3rd, instantaneous temperature reduction not resume combustion,
It is that comburant is able to cool rapidly and recrudescence rate is minimized because its water-retaining property is good.
Put out a fire during dilution agent use, fresh water or seawater can be used, no matter soft, hard water quality neither influences dense
The performance of contracting liquid.This concentration high-efficiency fire-extinguishant is applied to solid matter fire, liquid substance and fusible solid matter fire
Calamity.
Contain a large amount of ammonium salts in the concentration high-efficiency fire-extinguishant that the present invention is provided, ammonium salt discharges a large amount of ammonias when running into high temperature,
It can reach the purpose of rapid reduction temperature；In addition, sodium acid carbonate in water-based extinguishing agent can discharge carbon dioxide when heated
（CO2）, the oxygen in air and ignition point are isolated, the effect of fire extinguishing has fundamentally been reached；Surface is added in water to live
Property agent can reduce the surface tension of water, improve water in the adhesiveness on hydrophobicity object (such as plastics) surface, gone out so as to improve
Fiery effect；Sodium metasilicate gel solution is injected into media, crack in flame range temperature, closure coal is reduced, prevents from leaking out, receive very
Good extinguishing effect；The ethylene glycol of addition reduces the freezing point of extinguishing chemical, makes its suitable environment more extensive.In addition, the concentration
High-efficiency fire-extinguishant fire extinguishing grade is high（It can reach 2A, 89B grades）, anti-resume combustion excellent performance, and human body and environment are not caused damage.
The concentration high-efficiency fire-extinguishant that the present invention is provided can be widely applied to that fire extinguisher is filling, fire fighting truck is filling, forest fire protection, Building Fire Protection
Deng fire-fighting domain.
At present, the extinguishing chemical used on fire fighting truck has certain penetrating odor in itself, and has different degrees of to pipeline
Corrosion, easy resume combustion after fire extinguishing.And the concentration high-efficiency fire-extinguishant main component in the present invention is water, the above can be solved very well and asked
Topic.And can be with water with 1:After 16 ratio mixing, nontoxic water-based extinguishing agent is formed, heat can be absorbed rapidly when meeting fire
Amount, starvation, while preventing resume combustion, can substitute the extinguishing chemical used on present fire fighting truck with unconditional.
Embodiment
The application is further described with reference to specific embodiment.
Embodiment 1.
A kind of preparation method for concentrating high-efficiency fire-extinguishant, specifically includes following steps：1kg water is carried out to be heated to 70 DEG C；
0.6kg urea, 0.15kg ammonium chlorides, 0.2kg ammonium sulfate are added into the water, and carries out stirring 30min for the first time；Will be above-mentioned
Solution is cooled to 40 DEG C；0.05kg sodium acid carbonates, 0.03kg potassium carbonate, 0.02kg sodium metasilicate gel solution, 0.05kg is added to gather
Ammonium phosphate simultaneously carries out second of stirring 55min；Add 0.2kg ethylene glycol and carry out third time stirring 50min；Add 0.01kg's
Capstone1157 surfactants and 0.1kg foaming agents carry out the 4th stirring 40min.
Embodiment 2.
A kind of preparation method for concentrating high-efficiency fire-extinguishant, specifically includes following steps：1kg water is carried out to be heated to 70 DEG C；
0.3kg urea, 0.3kg ammonium chlorides, 0.05kg ammonium sulfate are added into the water, and carries out stirring 35min for the first time；Will be above-mentioned
Solution is cooled to 30 DEG C；0.02kg sodium acid carbonates, 0.05kg potassium carbonate, 0.01kg sodium metasilicate gel solution, 0.02kg is added to gather
Ammonium phosphate simultaneously carries out second of stirring 48min；Add 0.4kg ethylene glycol and carry out third time stirring 45min；Add 0.03kg's
Capstone1157 surfactants and 0.01kg foaming agents carry out the 4th stirring 40min.
Embodiment 3.
A kind of preparation method for concentrating high-efficiency fire-extinguishant, specifically includes following steps：1kg water is carried out to be heated to 60 DEG C；
0.45kg urea, 0.4kg ammonium chlorides, 0.25kg ammonium sulfate are added into the water, and carries out stirring 30min for the first time；Will be upper
State solution and be cooled to 30 DEG C；Add 0.07kg sodium acid carbonates, 0.04kg potassium carbonate, 0.035kg sodium metasilicate gel solution, 0.01kg
APP simultaneously carries out second of stirring 55min；Add 0.3kg ethylene glycol and carry out third time stirring 60min；Add 0.15kg
Capstone1157 surfactants and 0.1kg foaming agents carry out the 4th time stirring 40min.
Comparative example 1.
The selection of surfactant：Different hydrocarbon class surfactants and fluorine have successively been screened in the formula of extinguishing chemical
Carbon surface active agent, test data shows effect of the extinguishing effect than hydrocarbon class surfactant of fluorocarbon surfactant
It is good, but because the cost of fluorine-containing surfactant is higher, so controlling its addition within 15%.
A kind of preparation method of extinguishing chemical, specifically includes following steps：1kg water is carried out to be heated to 70 DEG C；To the water
Middle addition 0.6kg urea, 0.15kg ammonium chlorides, 0.2kg ammonium sulfate, and carry out stirring 30min for the first time；Above-mentioned solution is cooled
To 40 DEG C；Add 0.05kg sodium acid carbonates, 0.03kg potassium carbonate, 0.02kg sodium metasilicate gel solution, 0.05kg APPs simultaneously
Carry out second of stirring 55min；Add 0.2kg ethylene glycol and carry out third time stirring 50min；Add 0.01kg hydrocarbon surface
Activating agent and 0.1kg foaming agents carry out the 4th stirring 40min.
Comparative example 2.
The selection of foaming agent：5 kinds of commercially available foaming agents, extinguishing effect otherness have been selected in the formula of extinguishing chemical simultaneously
The very big therefore preferred foaming agent of Yangzhou Chenhua New Materials Co., Ltd., amount and the extinguishing effect of foaming agent have directly
Relation, but, on the basis of identical extinguishing effect is reached, so controlling its addition within 15%. with surfactant similarly.
A kind of preparation method for concentrating high-efficiency fire-extinguishant, specifically includes following steps：1kg water is carried out to be heated to 70 DEG C；
0.6kg urea, 0.15kg ammonium chlorides, 0.2kg ammonium sulfate are added into the water, and carries out stirring 30min for the first time；Will be above-mentioned
Solution is cooled to 40 DEG C；0.05kg sodium acid carbonates, 0.03kg potassium carbonate, 0.02kg sodium metasilicate gel solution, 0.05kg is added to gather
Ammonium phosphate simultaneously carries out second of stirring 55min；Add 0.2kg ethylene glycol and carry out third time stirring 50min；Add 0.01kg's
Capstone1157 surfactants and 0.1kg foaming agents carry out the 4th stirring 40min；Wherein stone man is respectively adopted in foaming agent
The ADC production of low-temperature foaming agent of Zhuan Yun slopes Chemical Industry Science Co., Ltd..
Comparative example 3.
Sodium metasilicate gel solution injects media, reduces crack in flame range temperature, closure coal, prevents from leaking out, receive well
Extinguishing effect, but the injection rate of sodium metasilicate gel solution can not be too many, otherwise can influence the extinguishing effect of extinguishing chemical, plays opposite
Effect.
A kind of preparation method for concentrating high-efficiency fire-extinguishant, specifically includes following steps：1kg water is carried out to be heated to 70 DEG C；
0.6kg urea, 0.15kg ammonium chlorides, 0.2kg ammonium sulfate are added into the water, and carries out stirring 30min for the first time；Will be above-mentioned
Solution is cooled to 40 DEG C；0.05kg sodium acid carbonates, 0.03kg potassium carbonate, 0.04kg sodium metasilicate gel solution, 0.05kg is added to gather
Ammonium phosphate simultaneously carries out second of stirring 55min；Add 0.2kg ethylene glycol and carry out third time stirring 50min；Add 0.01kg's
Capstone1157 surfactants and 0.1kg foaming agents carry out the 4th stirring 40min.
2nd, major parameter test result, is shown in Table 1.
The performance test results of 1 above-mentioned 3 embodiment of table and 3 comparative examples.
In terms of result more than, embodiment 2 reduces the addition of urea than embodiment 1, reduces the addition of foaming agent
Amount, and both raw materials exactly influence the primary raw material of extinguishing property, as a result prove that the ratio effect of embodiment 1 becomes apparent from；
Embodiment 3 compares with embodiment 1, reduces the addition of urea, considerably increases the addition of surfactant, such
Extinguishing property is not so good as the raw material proportioning of embodiment 1 when as a result, and the increase of surfactant addition substantially increases product
Cost, and extinguishing effect is not improved, so taking one thing with another, the scheme of embodiment 1 is more suitable for industrialized production.
Comparative example 1 has attempted different surfactants, the surface of the effect mainly reduction product of surfactant
Contribution of the hc-surfactant selected in power, but comparative example 1 to reducing surface tension is little, so not using hydrocarbon surface
Activating agent；Comparative example 2 has attempted different foaming agents, and foaming agent mainly influences the quality of extinguishing effect, and result of the test is found not
Same foaming agent influences very big to extinguishing effect, the foaming agent of last preferably Yangzhou Chenhua New Materials Co., Ltd.；Contrast
The addition of sodium metasilicate gel solution is tested in example 3, result of the test shows, the addition of silicic acid gel solvent is not
It is the bigger the better, and selects an adequate value just to play reduction flame range temperature, improves extinguishing effect.
Claims (7)
1. one kind concentration high-efficiency fire-extinguishant, it is characterised in that its raw material is as follows：Urea, ammonium chloride, ammonium sulfate, sodium acid carbonate, carbon
Sour potassium, sodium metasilicate gel solution, ethylene glycol, APP, surfactant, foaming agent, water；The weight of the urea is described
The 30%-60% of the weight of water；The weight of the ammonium chloride is the 15%-40% of the weight of the water；The weight of the ammonium sulfate is
The 5%-25% of the weight of the water；The weight of the sodium acid carbonate is the 2%-7% of the weight of the water；The weight of affiliated potassium carbonate
For the 3%-5% of the weight of the water；The weight of the sodium metasilicate gel solution is the 1%-3.5% of the weight of the water；It is described poly-
The weight of ammonium phosphate is the 1%-5% of the weight of the water；The weight of the ethylene glycol is the 20%-40% of the weight of the water；Institute
State 1%-15% of the weight of surfactant for the weight of the water；The weight of the foaming agent is the 1%- of the weight of the water
15%。
2. the preparation method of high-efficiency fire-extinguishant is concentrated as claimed in claim 1, it is characterised in that specifically include following steps：
Water is carried out to be heated to 60 DEG C -70 DEG C；Urea, ammonium chloride, ammonium sulfate are added into the water, and carries out first time stirring；Will
Above-mentioned solution is cooled to 30 DEG C -40 DEG C；Add sodium acid carbonate, potassium carbonate, sodium metasilicate gel solution, APP and progress second
Secondary stirring；Add ethylene glycol and carry out third time stirring；Add surfactant and foaming agent carries out the 4th stirring.
3. the preparation method of concentration high-efficiency fire-extinguishant as claimed in claim 1, it is characterised in that first time stirring when
Between be not less than 20min；The time of second of stirring is not less than 40min；The time of the third time stirring is not less than
40min；The time of the 4th time described stirring is not less than 40min；Described speed of agitator is 60r/min.
4. the preparation method of high-efficiency fire-extinguishant is concentrated as claimed in claim 3, it is characterised in that specifically include following steps：
1kg water is carried out to be heated to 70 DEG C；0.6kg urea, 0.15kg ammonium chlorides, 0.2kg ammonium sulfate are added into the water, and is carried out
30min is stirred for the first time；Above-mentioned solution is cooled to 40 DEG C；Add 0.05kg sodium acid carbonates, 0.03kg potassium carbonate, 0.02kg silicon
Sour sodium gel solution, 0.05kg APPs simultaneously carry out second of stirring 55min；0.2kg ethylene glycol is added stir for the third time
Mix 50min；The Capstone1157 surfactants and 0.1kg foaming agents for adding 0.01kg carry out the 4th stirring 40min.
5. the preparation method of high-efficiency fire-extinguishant is concentrated as claimed in claim 3, it is characterised in that specifically include following steps：
1kg water is carried out to be heated to 70 DEG C；0.3kg urea, 0.3kg ammonium chlorides, 0.05kg ammonium sulfate are added into the water, and is carried out
35min is stirred for the first time；Above-mentioned solution is cooled to 30 DEG C；Add 0.02kg sodium acid carbonates, 0.05kg potassium carbonate, 0.01kg silicon
Sour sodium gel solution, 0.02kg APPs simultaneously carry out second of stirring 48min；0.4kg ethylene glycol is added stir for the third time
Mix 45min；The Capstone1157 surfactants and 0.01kg foaming agents for adding 0.03kg carry out the 4th stirring
40min。
6. the preparation method of high-efficiency fire-extinguishant is concentrated as claimed in claim 3, it is characterised in that specifically include following steps：
1kg water is carried out to be heated to 60 DEG C；0.45kg urea, 0.4kg ammonium chlorides, 0.25kg ammonium sulfate are added into the water, is gone forward side by side
Row stirs 30min for the first time；Above-mentioned solution is cooled to 30 DEG C；Add 0.07kg sodium acid carbonates, 0.04kg potassium carbonate,
0.035kg sodium metasilicate gel solution, 0.01kg APPs simultaneously carry out second of stirring 55min；0.3kg ethylene glycol is added to carry out
Third time stirring 60min；The Capstone1157 surfactants and 0.1kg foaming agents for adding 0.15kg carry out the 4th time and stirred
Mix 40min.
7. the concentration high-efficiency fire-extinguishant as described in claim 1-6 is with water with 1:16 part by weight is mixed for the 2A and 89B that goes out
The fire of rank.
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| CN107670216A (en) * | 2017-11-10 | 2018-02-09 | 河南赛荣斯安全科技有限公司 | Coal spontaneous combustion fire extinguishing decoction |
| CN110448850A (en) * | 2019-08-16 | 2019-11-15 | 陕西胜捷瑞能消防科技有限公司 | A kind of low temperature concentrated type extinguishing chemical and its preparation method and application method |
| CN110812765A (en) * | 2019-11-14 | 2020-02-21 | 江苏佳泰消防科技有限公司 | High-molecular gel super-concentrated fire extinguishing agent and preparation method thereof |
| CN112439155A (en) * | 2020-12-04 | 2021-03-05 | 沈阳仁辉消防科技有限公司 | Alcohol-resistant environment-friendly water extinguishing agent |
| WO2022034580A1 (en) | 2020-08-09 | 2022-02-17 | Bioma Ltd | Firefighting compositions |
| CN114504758A (en) * | 2020-11-16 | 2022-05-17 | 中国石油化工股份有限公司 | Fluorine-free foam extinguishing agent and preparation method thereof |
| CN115591173A (en) * | 2022-10-09 | 2023-01-13 | 广东电网有限责任公司（Cn） | Composite fire extinguishing agent, preparation method thereof, fire extinguishing device comprising composite fire extinguishing agent and application of composite fire extinguishing agent |
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| WO2022034580A1 (en) | 2020-08-09 | 2022-02-17 | Bioma Ltd | Firefighting compositions |
| CN114504758A (en) * | 2020-11-16 | 2022-05-17 | 中国石油化工股份有限公司 | Fluorine-free foam extinguishing agent and preparation method thereof |
| CN114504758B (en) * | 2020-11-16 | 2023-06-30 | 中国石油化工股份有限公司 | Fluorine-free foam extinguishing agent and preparation method thereof |
| CN112439155A (en) * | 2020-12-04 | 2021-03-05 | 沈阳仁辉消防科技有限公司 | Alcohol-resistant environment-friendly water extinguishing agent |
| CN115591173A (en) * | 2022-10-09 | 2023-01-13 | 广东电网有限责任公司（Cn） | Composite fire extinguishing agent, preparation method thereof, fire extinguishing device comprising composite fire extinguishing agent and application of composite fire extinguishing agent |
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Application publication date: 20170811 |