CN111111082A - Environment-friendly foam extinguishing agent and preparation method thereof - Google Patents
Environment-friendly foam extinguishing agent 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
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Abstract
The invention relates to a foam extinguishing agent, in particular to an environment-friendly foam extinguishing agent of a biosurfactant, which can extinguish fire quickly and cool down quickly. The environment-friendly foam extinguishing agent comprises a surfactant, wherein the surfactant is prepared by compounding a fluorocarbon surfactant or a hydrocarbon surfactant, an organosilicon surfactant and a biosurfactant. The environment-friendly foam extinguishing agent has good foamability and film-forming property, and is quick in fire extinguishing, quick in temperature reduction, easy to degrade and small in harm to the environment. The invention also relates to a preparation method of the environment-friendly foam extinguishing agent.
Description
Technical Field
The invention relates to a foam extinguishing agent, in particular to an environment-friendly foam extinguishing agent of a biosurfactant with rapid fire extinguishing and rapid cooling and a preparation method thereof.
Background
The foam extinguishing agent is used as one of all extinguishing agent varieties with the largest using amount, is widely applied to fighting solid fires and liquid fires in the fields of municipal fire fighting, petrochemical fire fighting and the like, and plays an important role in protecting the safety of lives and properties of people. As a class of chemicals consisting of a surfactant with foaming performance and other functional auxiliaries, the foam extinguishing agent has the risk of releasing harmful substances into the natural environment in the whole life cycle of production, storage, use and waste, and brings potential threat to the environment. The basic reason why the foam extinguishing agent has potential harm to the environment is that organic compounds contained in the foam extinguishing agent cause potential risks to the environment after entering the environment, and mainly appear in the aspects of consuming dissolved oxygen in water, generating toxic effect on aquatic animals and plants, being difficult to biodegrade and lasting in the environment. Therefore, biodegradability is an important index for investigating the environmental compatibility of the foam extinguishing agent, and the development of an environment-friendly foam extinguishing agent which is easy to degrade is very important for protecting the environment and ecology.
The present invention has been made in view of this situation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an environment-friendly foam extinguishing agent.
In order to solve the technical problems, the invention adopts the technical scheme that:
a foam extinguishing agent comprises a surfactant, wherein the surfactant is prepared by compounding a fluorocarbon surfactant or a hydrocarbon surfactant, an organosilicon surfactant and a biosurfactant.
After the fluorocarbon surfactant or the hydrocarbon surfactant, the organosilicon surfactant and the biosurfactant are compounded, the interfacial tension between the foam solution and the combustible liquid can be effectively reduced, the spreading of fire-extinguishing foam on the surface of the combustible liquid is promoted, the biodegradation degree can be improved, and the harm to the environment is reduced.
The foam fire extinguishing agent compounded by the fluorocarbon surfactant, the organic silicon surfactant and the biosurfactant reduces the content of fluorocarbon through compounding, improves the biodegradability, reduces the harm to the environment, and ensures the fire extinguishing effect through compounding.
The foam extinguishing agent compounded by the hydrocarbon surfactant, the organosilicon surfactant and the biosurfactant obviously improves the biodegradability, and the compounded foam extinguishing agent has smaller surface tension, better spreadability and excellent fire extinguishing performance.
As an embodiment of the present invention, the hydrocarbon surfactant includes a straight-chain type hydrophobic group, which can improve the biodegradability of the fire extinguishing agent. In one embodiment of the present invention, the amount of the fluorocarbon surfactant or hydrocarbon surfactant is 1 to 15 parts by weight, the amount of the silicone surfactant is 5 to 30 parts by weight, and the amount of the biosurfactant is 30 to 70 parts by weight;
preferably, 10 parts by weight of fluorocarbon surfactant or hydrocarbon surfactant, 30 parts by weight of silicone surfactant and 60 parts by weight of biosurfactant.
As an embodiment of the present invention, the biosurfactant is one or more selected from rhamnolipid, sophorolipid, lecithin and lipopeptide surfactant, preferably, at least comprises lipopeptide surfactant.
In one embodiment of the present invention, the biosurfactant is a lipopeptide produced by acylation of a vegetable protein.
Lipopeptide substances generated after the vegetable protein is acylated have small surface tension and good compounding performance, are easy to degrade and cannot generate substances harmful to the natural environment.
The lipopeptide is surfactant, subtilin, polymyxin, thujaplicin, muslin or lichenin.
As an embodiment of the present invention, the hydrocarbon surfactant is an anionic, nonionic or amphoteric hydrocarbon surfactant.
The anionic hydrocarbon surfactant is one or more of the following substances: linear alkyl sulfate (FAS), linear fatty alcohol polyoxyethylene ether sulfate (AES), linear alkyl sulfonate (SAS), linear a-olefin sulfonate (AOS), or linear alkyl benzene sulfonate (LAS).
The amphoteric hydrocarbon surfactant is one or more of amino acid type, betaine type, imidazoline type, phospholipid or protein derivative surfactant. For example, the amino acid type is lauryl ammonium propionate inner salt; the betaine type is dodecyl dimethyl betaine, dodecyl dimethyl sulfobetaine or lauramidopropyl betaine (LMB); the imidazoline type is 2-alkyl-N-hydroxyethyl- (N) -hydroxypropyl sulfoimidazoline.
The nonionic hydrocarbon surfactant is fatty alcohol polyoxyethylene ether (AEO), Alkylphenol Polyoxyethylene Ether (APEO), polyoxyethylene sorbitan monocarboxylic acid ester (Tween) or alkyl glycoside (APG).
The fluorocarbon surfactant is selected from one or more fluorine substitutes of the amphoteric hydrocarbon surfactant.
As an embodiment of the present invention, the silicone surfactant is selected from silane or silicone wax; preferably, the silane is polydimethylsiloxane and the silicone wax is a silicone glycol interpolymer wax.
The invention comprises a burning-resistant agent which is selected from one or more of diammonium hydrogen phosphate, ammonium dihydrogen phosphate, ammonium carbonate, ammonium sulfate, ammonium borate, ammonium silicate or ammonium molybdate; preferably, ammonium dihydrogen phosphate is used as a main anti-burning agent, and ammonium carbonate is used as an auxiliary anti-burning agent.
As an embodiment of the invention, the foaming agent is included, and is selected from one or more of alkyl glycoside, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate or alkyl glucose amide. Preferably, alkyl glycoside is selected as the main foaming agent, and sulfate or sulfonate is selected as the auxiliary foaming agent.
The foaming agent not only helps to improve the biodegradability of the fire extinguishing agent, but also has excellent foaming performance.
As an embodiment of the invention, the environment-friendly foam extinguishing agent comprises a foam stabilizer which is selected from one or more of dodecanol, polyacrylamide, xanthan gum, sodium alginate or polyethylene glycol 20000;
preferably, the solvent comprises one or more of cosolvent selected from ethylene glycol monobutyl ether, urea, diethylene glycol monobutyl ether or glycerol;
comprises an antifreeze agent selected from one or two of ethylene glycol or glycerol;
comprises corrosion inhibitor selected from one or two of sodium molybdate or aspartic acid;
comprises an anti-solvent which consists of xanthan gum, sodium alginate and carboxymethyl cellulose;
comprises a penetrating agent which consists of fatty alcohol-polyoxyethylene ether, sodium diisooctyl succinate sulfonate and sodium di-sec-octyl maleate sulfonate.
The invention also relates to a preparation method of the environment-friendly foam extinguishing agent, which comprises the following steps:
compounding a fluorocarbon surfactant or a hydrocarbon surfactant, an organic silicon surfactant and a biosurfactant to obtain a component A;
mixing one or more of an anti-burning agent, a foaming agent, a foam stabilizer, a cosolvent, an antifreeze agent, a corrosion inhibitor, an anti-solvent and a penetrating agent to obtain a component B;
and adding a certain weight part of the component A into the component B, and uniformly mixing to obtain the foam extinguishing agent.
As an embodiment of the invention, the preparation method of the environment-friendly foam extinguishing agent comprises the following steps:
10 parts of fluorocarbon surfactant, 60 parts of biosurfactant and 30 parts of organic silicon surfactant are mixed and stirred uniformly to obtain a component A;
6 parts by weight of ammonium dihydrogen phosphate, 6 parts by weight of ammonium carbonate, 081014 parts by weight of APG, 4 parts by weight of sodium dodecyl sulfate, 1 part by weight of dodecanol, 5 parts by weight of urea, 4 parts by weight of ethylene glycol monobutyl ether, 2 parts by weight of aspartic acid and 56 parts by weight of water are uniformly mixed to obtain a component B;
and adding 2 parts by weight of the component A into the component B, and uniformly mixing to obtain the foam extinguishing agent.
Alternatively, the preparation method comprises the following steps:
10 parts by weight of hydrocarbon surfactant, 60 parts by weight of biosurfactant and 30 parts by weight of organosilicon surfactant are mixed and stirred uniformly to obtain a component A;
6 parts by weight of ammonium dihydrogen phosphate, 6 parts by weight of ammonium carbonate, 081014 parts by weight of APG, 4 parts by weight of sodium dodecyl sulfate, 40004 parts by weight of polyethylene glycol, 5 parts by weight of urea, 4 parts by weight of ethylene glycol monobutyl ether, 2 parts by weight of aspartic acid, 18 parts by weight of ethylene glycol and 33 parts by weight of water to obtain component B;
and adding 4 parts by weight of the component A into the component B, and uniformly mixing to obtain the foam extinguishing agent.
On the premise of ensuring high-performance fire extinguishing, the foam extinguishing agent reduces the dosage of non-degradable reagents to the greatest extent, reduces the harm to the environment, or directly uses the combination of the biosurfactant with good degradability and good fire extinguishing effect and the hydrocarbon surfactant to replace the non-degradable fluorocarbon surfactant, is easy to degrade, is an environment-friendly foam extinguishing agent, and has higher fire extinguishing capability.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are described in detail and completely with reference to some examples, which are only used for illustrating the present invention and are not used for limiting the scope of the present invention.
Example 1
The component A comprises: 10g of 1-fluorododecyl dimethyl betaine (fluorocarbon surfactant), 60g of rhamnolipid (biosurfactant) and 30g of polydimethylsiloxane (organic silicon surfactant)
And B component:
an anti-burning agent: ammonium dihydrogen phosphate (6 g) and ammonium carbonate (6 g)
Foaming agent: APG 081014 g, sodium dodecyl sulfate 4g
Foam stabilizer: dodecanol 1g
Cosolvent: 5g of urea and 4g of ethylene glycol monobutyl ether
Corrosion inhibitor: aspartic acid 2g
Water: 56g
Sequentially adding the three surfactants of the component A into a flask according to the proportion, stirring for 1 hour, uniformly mixing, and standing for 1 hour;
adding 56g of deionized water into a flask, heating to 60 ℃, adding 5g of urea, 6g of ammonium carbonate and 6g of diammonium hydrogen phosphate, stirring for 30 minutes, pouring APG 081014 g, stirring for 30 minutes, adding 4g of sodium dodecyl sulfate, stirring for 1 hour, adding 1g of dodecanol, stirring for 30 minutes, adding 4g of ethylene glycol monobutyl ether, stirring for 30 minutes, standing for 1 hour, finally adding 2g of aspartic acid and 2g A components, stirring for 30 hours, and standing for 1 hour.
Example 2
The component A comprises: 10g of 1, 2-difluoro eicosane glycoside (fluorocarbon surfactant), 60g of sophorolipid (biosurfactant) and 30g of silicone glycol copolymer wax (silicone surfactant)
And B component:
an anti-burning agent: ammonium polyphosphate 6g
Foaming agent: APG 081032 g, sodium dodecyl sulfate 8g
Foam stabilizer: dodecanol 2g
Cosolvent: 5g of urea and 4g of ethylene glycol monobutyl ether
Corrosion inhibitor: aspartic acid 2g
Wetting agent: t-quick penetrant 2g
Water: 38g
Preparation method referring to example 1, the addition amount of each material component was as above, and 1g of the A component was added to the B component.
Example 3
The component A comprises: 10g of 1, 1-difluorododecylammoniopropionic acid inner salt (fluorocarbon surfactant), 60g of lecithin (biosurfactant) and 30g of polydimethylsiloxane (silicone surfactant)
And B component:
foaming agent: APG 081014 g, sodium dodecyl sulfate 4g
Foam stabilizer: polyethylene glycol 40003.5 g
Cosolvent: 5g of urea and 9g of diethylene glycol monobutyl ether
Anti-solvent: xanthan gum 1g and sodium alginate 2g
Corrosion inhibitor: aspartic acid 2g
Water: 57g
When the preparation method is adopted, 57g of water is firstly taken, 1g of xanthan gum and 2g of sodium alginate are added, the mixture is emulsified in an emulsifying machine for 30 minutes, and then the preparation method is carried out according to the method of example 1, and 2.5g of A component is added into B component.
Example 4
The component A comprises: 10g of n-octane sulfate (hydrocarbon surfactant), 60g of sophorolipid (biosurfactant) and 30g of polydimethylsiloxane (silicone surfactant)
And B component:
an anti-burning agent: ammonium dihydrogen phosphate (6 g) and ammonium carbonate (6 g)
Main foaming agent: APG 081014 g, sodium dodecyl sulfate 4g
Foam stabilizer: polyethylene glycol 40004 g
Cosolvent: 5g of urea and 4g of ethylene glycol monobutyl ether
Corrosion inhibitor: aspartic acid 2g
An antifreeze agent: ethylene glycol 18g
Water: 33g
The three surfactants are added into a flask according to the proportion in sequence, stirred for 1 hour and kept stand for 1 hour to obtain the component A.
Adding 58g of deionized water into a flask, heating to 60 ℃, adding 5g of urea, 6g of ammonium carbonate and 6g of diammonium hydrogen phosphate, stirring for 30 minutes, adding 18g of ethylene glycol, stirring for 30 minutes, adding APG 081014 g, stirring for 30 minutes, adding 4g of sodium dodecyl sulfate, stirring for 1 hour, adding 4g of polyethylene glycol, stirring for 30 minutes, adding 4g of ethylene glycol monobutyl ether, stirring for 30 minutes, standing for 1 hour, finally adding 2g of aspartic acid and 4g of the component A, stirring for 30 minutes, and standing for 1 hour.
Example 5
The component A comprises: 10g of dodecyl dimethyl betaine (hydrocarbon surfactant), 60g of polymyxin (biosurfactant) and 30g of polydimethylsiloxane (silicone surfactant)
And B component:
an anti-burning agent: ammonium polyphosphate 6g
Foaming agent: APG 081032 g, sodium dodecyl sulfate 8g
Foam stabilizer: dodecanol 2g
Cosolvent: 5g of urea and 4g of ethylene glycol monobutyl ether
Corrosion inhibitor: aspartic acid 2g
Wetting agent: t-quick penetrant 2g
Water: 35 percent of
Preparation method referring to example 4, the amount of component A was 4g, and the total amount of A + B amounted to 100 g.
Example 6
The component A comprises: 10g of lauroyl diethanol amine (hydrocarbon surfactant), 60g of sophorolipid (biosurfactant) and 30g of silicone glycol copolymer wax (silicone surfactant)
And B component:
foaming agent: APG 081014 g, sodium dodecyl sulfate 4g
Foam stabilizer: polyethylene glycol 40003.5 g
Cosolvent: 5g of urea and 9g of diethylene glycol monobutyl ether
Anti-solvent: xanthan gum 1g and sodium alginate 2g
Corrosion inhibitor: aspartic acid 2g
Water: 60.5g
60.5g of water is firstly taken, 1g of xanthan gum and 2g of sodium alginate are added, the materials are emulsified in an emulsifying machine for 30 minutes, and then the preparation method is carried out according to the method of the embodiment 4, the dosage of the component A is 4g, and the total amount of A and B is 100 g.
The surface tension of the foam extinguishants of examples 4 to 6 is small and may be lower than 20X 10-3Newton/meter, good spreadability, and can replace fluorocarbon surfactant in the water film-forming fire extinguishing agent, and each component in the foam extinguishing agent has good biodegradability, belonging to an environment-friendly foam extinguishing agent.
Comparative example 1
The difference from example 1 is that the A component: 10g of fluorocarbon surfactant and 30g of organic silicon surfactant, and the other components and the preparation method are the same.
Comparative example 2
The difference from example 2 is that the A component: 10g of fluorocarbon surfactant and 60g of biosurfactant, and the other components and the preparation method are the same.
Comparative example 3
The difference from example 3 is that the A component: 60g of biosurfactant and 30g of organosilicon surfactant, and the other components and the preparation method are the same.
Comparative example 4
The difference from example 4 is that the A component: 10g of hydrocarbon surfactant and 30g of organic silicon surfactant, and the other components and the preparation method are the same.
Comparative example 5
The difference from example 5 is that the A component: 10g of hydrocarbon surfactant and 60g of biosurfactant, and the other components and the preparation method are the same.
Comparative example 6
The difference from example 6 is in the a component: 10g of hydrocarbon surfactant, 20g of biosurfactant and 35g of organic silicon surfactant, and the other components and the preparation method are the same.
Experimental example 1
The fire extinguishing performance of the foam fire extinguishing agents prepared in examples 1 to 6 and comparative examples 1 to 6 was examined in this experimental example, and the experimental results obtained by referring to GB15308-2006 are shown in the following table.
TABLE 1
From the above experimental results, the following conclusions can be drawn:
1. the environment-friendly foam extinguishing agent has short fire extinguishing time, long burning-resistant time and good fire extinguishing efficiency;
2. compared with the fire extinguishing agents of the examples 1 to 5, the fire extinguishing agents of the comparative examples 1 to 5 have the advantages that the surface active agents do not adopt the compounding mode, the fire extinguishing time is relatively long, the burning resistant time is relatively short, and the fire extinguishing efficiency is poorer than that of the environment-friendly foam fire extinguishing agent of the invention;
3. comparative example 6 is the same as example 6 in the types of the components, but the compounded surfactant is different in parts by weight of each type of surfactant, and the ratio of parts by weight of the compounded surfactant is not adopted, so that the fire extinguishing time is slightly longer, the burning resistance time is slightly shorter, and the optimal fire extinguishing efficiency is not achieved.
Experimental example 2
This experimental example examined the biodegradation activity of the fire extinguishing agents of examples 1 to 6 and comparative examples 1 to 6, and the obtained experimental results are shown in Table 2.
TABLE 2
From the above experimental results, the following conclusions can be drawn:
1. the environment-friendly foam extinguishing agent is quickly degraded and has high degradation degree;
2. compared with the fire extinguishing agents in the examples 1 to 5, the fire extinguishing agents in the comparative examples 1 to 5 have the advantages that the surface active agents are not compounded, the degradation speed is relatively slow, the degradation degree is relatively low, and the biodegradation performance is poorer than that of the environment-friendly foam extinguishing agent disclosed by the invention;
3. comparative example 6 has the same type of components as example 6, but the compounded surfactant has different parts by weight of each type of surfactant, and the ratio of parts by weight of the compounded surfactant is not adopted, so that the degradation speed is relatively slow, the degradation degree is relatively low, and the biodegradation performance can be improved.
Experimental example 3
The experiment inspects the influence of the preparation method of the environment-friendly fire extinguishing agent on the fire extinguishing performance.
The formulations of comparative examples 7 to 12 and examples 1 to 6 are in agreement with each other, with the only difference being that: during preparation, substances contained in the corresponding component A and the component B are added and mixed together, and the component A is not added into the component B after the corresponding component A and the component B are obtained.
The fire extinguishing performance of the foam extinguishants prepared in examples 1 to 6 and comparative examples 7 to 12 was tested in this experiment, and the experimental results obtained by referring to GB15308-2006 were as shown in the following table.
TABLE 3
According to the above experimental results, although the components of comparative examples 7 to 12 are respectively the same as those of examples 1 to 6, the fire extinguishing effect of the fire extinguishing agent obtained by the preparation is different due to different steps used in the preparation of the fire extinguishing agent, and thus it can be seen that the preparation method of the environment-friendly fire extinguishing agent according to the present invention is helpful to further improve the fire extinguishing performance.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The environment-friendly foam extinguishing agent comprises a surfactant, and is characterized in that the surfactant is prepared by compounding a fluorocarbon surfactant or a hydrocarbon surfactant, an organosilicon surfactant and a biosurfactant.
2. The environment-friendly foam fire extinguishing agent as recited in claim 1, wherein the fluorocarbon surfactant or hydrocarbon surfactant is 1-15 parts by weight, the organosilicon surfactant is 5-30 parts by weight, and the biosurfactant is 30-70 parts by weight;
preferably, 10 parts by weight of fluorocarbon surfactant or hydrocarbon surfactant, 30 parts by weight of silicone surfactant and 60 parts by weight of biosurfactant.
3. The environmentally friendly foam fire extinguishing agent according to claim 1 or 2, wherein the biosurfactant is one or more selected from rhamnolipid, sophorolipid, lecithin and lipopeptide, preferably, the biosurfactant is lipoid peptide substance generated by acylation of vegetable protein.
4. The environmentally friendly foam fire extinguishing agent according to any one of claims 1 to 3, wherein the hydrocarbon surfactant is an anionic, nonionic or amphoteric hydrocarbon surfactant.
5. The environmentally friendly foam fire extinguishing agent according to any one of claims 1 to 4, wherein the silicone surfactant is selected from silane or silicone wax; preferably, the silane is polydimethylsiloxane and the silicone wax is a silicone glycol interpolymer wax.
6. The environmentally friendly fire foam of any one of claims 1 to 5, which comprises a fire retardant selected from one or more of diammonium hydrogen phosphate, ammonium dihydrogen phosphate, ammonium carbonate, ammonium sulfate, ammonium borate, ammonium silicate and ammonium molybdate; preferably, ammonium dihydrogen phosphate is used as a main anti-burning agent, and ammonium carbonate is used as an auxiliary anti-burning agent.
7. The environment-friendly foam fire extinguishing agent according to any one of claims 1 to 6, which comprises a foaming agent selected from one or more of alkyl glycoside, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate or alkyl glucamide; preferably, alkyl glycoside is selected as the main foaming agent, and sulfate or sulfonate is selected as the auxiliary foaming agent.
8. The environment-friendly foam fire extinguishing agent according to any one of claims 1 to 7, which comprises a foam stabilizer selected from one or more of dodecanol, polyacrylamide, xanthan gum, sodium alginate or polyethylene glycol 20000;
comprises a cosolvent which is selected from one or more of ethylene glycol monobutyl ether, urea, diethylene glycol monobutyl ether or glycerol;
comprises an antifreeze agent selected from one or two of ethylene glycol or glycerol;
comprises corrosion inhibitor selected from one or two of sodium molybdate or aspartic acid;
comprises an anti-solvent which consists of xanthan gum, sodium alginate and carboxymethyl cellulose;
comprises a penetrating agent which consists of fatty alcohol-polyoxyethylene ether, sodium diisooctyl succinate sulfonate and sodium di-sec-octyl maleate sulfonate.
9. The preparation method of the environment-friendly foam extinguishing agent is characterized by comprising the following steps:
compounding a fluorocarbon surfactant or a hydrocarbon surfactant, an organic silicon surfactant and a biosurfactant to obtain a component A;
mixing one or more of an anti-burning agent, a foaming agent, a foam stabilizer, a cosolvent, an antifreeze agent, a corrosion inhibitor, an anti-solvent and a penetrating agent to obtain a component B;
and adding a certain weight part of the component A into the component B, and uniformly mixing to obtain the foam extinguishing agent.
10. The method for preparing the environment-friendly foam extinguishing agent according to claim 9, which is characterized by comprising the following steps:
10 parts of fluorocarbon surfactant, 60 parts of biosurfactant and 30 parts of organic silicon surfactant are mixed and stirred uniformly to obtain a component A;
6 parts by weight of ammonium dihydrogen phosphate, 6 parts by weight of ammonium carbonate, 081014 parts by weight of APG, 4 parts by weight of sodium dodecyl sulfate, 1 part by weight of dodecanol, 5 parts by weight of urea, 4 parts by weight of ethylene glycol monobutyl ether, 2 parts by weight of aspartic acid and 56 parts by weight of water are uniformly mixed to obtain a component B;
adding 2 parts by weight of the component A into the component B, and uniformly mixing to obtain the foam extinguishing agent;
alternatively, the preparation method comprises the following steps:
10 parts by weight of hydrocarbon surfactant, 60 parts by weight of biosurfactant and 30 parts by weight of organosilicon surfactant are mixed and stirred uniformly to obtain a component A;
6 parts by weight of ammonium dihydrogen phosphate, 6 parts by weight of ammonium carbonate, 081014 parts by weight of APG, 4 parts by weight of sodium dodecyl sulfate, 40004 parts by weight of polyethylene glycol, 5 parts by weight of urea, 4 parts by weight of ethylene glycol monobutyl ether, 2 parts by weight of aspartic acid, 18 parts by weight of ethylene glycol and 33 parts by weight of water to obtain component B;
and adding 4 parts by weight of the component A into the component B, and uniformly mixing to obtain the foam extinguishing agent.
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