High-stable general-purpose environment-friendly foam extinguishing agent and use method thereof

Abstract

The present application belongs to the technical field of fire extinguishing agent, and particularly discloses a high-stability general-purpose environment-friendly foam fire extinguishing agent and a use method. The high-stability general-purpose environment-friendly foam fire extinguishing agent comprises A component and B component. The A component comprises a foaming agent, a cross-linking stabilizer, a preservative and water in a mass ratio of 15-27:23-35:0.1-0.3:37-62. The B component comprises a gel agent, a dispersing agent and a preservative in a mass ratio of 25-55:45-75:0.4-0.8. The obtained fire extinguishing agent has the advantages of strong gel foam stability, high water retention performance, 25% liquid separation time of more than 24 hours, short fire extinguishing time, long anti-burning time, high fire extinguishing efficiency and environmental protection. The fire extinguishing agent also has good fire extinguishing performance on various solid fires, can realize efficient rescue on A class fire, non-water-soluble B class fire and water-soluble B class fire, and has the general-purpose feature on fire extinguishing objects.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing agent technology, and in particular to a highly stable, universal, environmentally friendly foam fire extinguishing agent and its application method. Background Technology

[0002] Aqueous film-forming foam (AFFF) is the most widely used and consumed type of extinguishing agent both domestically and internationally, primarily used for extinguishing large-scale petrochemical fires and other flammable liquid fires. However, due to the poor foam stability of AFFF, the 25% separation time is only 2-3 minutes, and the post-extinguishing fire resistance time is typically only 5-8 minutes. This leads to repeated reignitions in large fires after extinguishing, significantly impacting firefighting and rescue operations. Furthermore, AFFF cannot be used to extinguish fires involving water-soluble liquids such as ethanol and acetone; these require specialized alcohol-resistant foam extinguishing agents, greatly inconveniencing the storage and transportation of these agents. This indicates that traditional firefighting foam systems based on water-based foam cannot meet the diverse needs of firefighting missions regarding foam stability and heat resistance.

[0003] Two-component gel foam is a feasible solution to the above problems. The gelling agent and crosslinking agent in the two components undergo a crosslinking reaction to form a three-dimensional network structure of gel, which can lock water within the network structure, thereby effectively improving foam strength and controlling the drainage rate between liquid films, thus significantly improving foam stability. Previously, two-component gel foam was mainly used in mine fire prevention and extinguishing and fracturing oil extraction scenarios. However, these two application scenarios differ significantly from fire extinguishing and rescue, with substantial differences in requirements for high-stability foam expansion ratio, foam viscosity, crosslinking time, and foam flowability, making the aforementioned extinguishing agents unsuitable for fire extinguishing and rescue. Chinese patent application CN 113018754A reports a two-component general-purpose high-stability foam extinguishing agent; however, the specific component in component A of this patent undergoes a direct crosslinking reaction to form a structurally stable gel, which cannot be mixed with component B to form foam, thus lacking feasibility. Furthermore, this patent uses borax and boric acid as crosslinking agents, resulting in a short gelation time, typically forming a stable gel within 5-10 seconds, which easily clogs foam proportioning mixers and pipelines, further reducing its usability. Chinese patent application CN 118121890A reports a fluorine-free, alcohol-resistant foam fire extinguishing agent based on weak bio-crosslinking and its preparation method. This patent requires a reaction at 50–60°C for 10–30 minutes to form stable foam when components A and B are mixed. However, heating conditions are unavailable at fire-fighting and rescue sites, and the reaction time is too long, making its use in such situations impractical. Chinese patent application CN 117839144A reports a gel foam fire extinguishing agent, its preparation method, and its use. This requires the use of strong alkalis such as NaOH as pH adjusters, which significantly impacts personnel health during production and use. Furthermore, the extinguishing agent can only extinguish fires through slow release, has a low fire extinguishing rating, and a short fire resistance time, resulting in poor practicality and failing to meet the requirements for efficient fire extinguishing and long-term resistance to reignition.

[0004] Components such as perfluorooctyl sulfonate (PFOS) and perfluorohexyl sulfonate (PFHxS) used in aqueous film-forming foam (AFCF) fire extinguishing agents have been classified as persistent organic pollutants and their use is restricted due to their persistence, bioaccumulation, and ecotoxicity. Both domestically and internationally, there is significant concern regarding the environmental performance and persistence of components used in foam fire extinguishing agents. Therefore, combining the high stability advantages of two-component foams with the practical needs of fire extinguishing and rescue operations for high stability, versatility, and environmental friendliness, the development and use of highly stable, versatile, and environmentally friendly foam fire extinguishing agents with adjustable foam states represents a future development trend. Summary of the Invention

[0005] In view of this, the present invention provides a highly stable, universal, and environmentally friendly foam fire extinguishing agent and its application method to solve the problems of low fire extinguishing level, short fire resistance time, and poor feasibility, stability, universality, and environmental friendliness of existing fire extinguishing agents.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A highly stable, general-purpose, environmentally friendly foam fire extinguishing agent, comprising component A and component B;

[0008] Component A includes a foaming agent, a crosslinking stabilizer, a preservative, and water, wherein the mass ratio of the foaming agent, crosslinking stabilizer, preservative, and water is 15–27: 23–35: 0.1–0.3: 37–62;

[0009] Component B includes a gelling agent, a dispersant, and a preservative, wherein the mass ratio of the gelling agent, dispersant, and preservative is 25–55: 45–75: 0.4–0.8.

[0010] Preferably, the foaming agent in component A includes nonionic surfactants and amphoteric surfactants.

[0011] Preferably, the mass ratio of the nonionic surfactant to the amphoteric surfactant in the foaming agent is 1:0.8 to 4.2;

[0012] The nonionic surfactant is an alkyl polysaccharide, and the amphoteric surfactant is betaine.

[0013] Preferably, the crosslinking stabilizer in component A includes a crosslinking coupling agent and calcium chloride.

[0014] Preferably, the mass ratio of the crosslinking coupling agent to calcium chloride in the crosslinking stabilizer is 0.8 to 6:1;

[0015] The crosslinking coupling agent includes diisopropyl di(triethanolamine) titanate and / or tetra(2-ethyl-1,3-hexanediol) titanate.

[0016] Preferably, the gelling agent in component B includes one or more of carboxymethyl hydroxypropyl guar gum, carboxymethyl guar gum, and hydroxypropyl guar gum.

[0017] Preferably, the dispersant in component B includes one or more of isopropanol, ethylene glycol, propylene glycol, and glycerol.

[0018] Preferably, the preservatives in components A and B independently include one or more of 1,2-benzisothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, and 5-chloro-2-methyl-4-isothiazolin-3-one.

[0019] Another objective of this invention is to provide a method for using a highly stable, universal, and environmentally friendly foam fire extinguishing agent, the method comprising the following steps:

[0020] Mix components A and B with water for fire extinguishing or fire suppression.

[0021] Preferably, during the fire extinguishing stage, the mass ratio of component A to component B is 1:0.07 to 0.15, and the mass ratio of the total mass of component A and component B to the mass of water is 1 to 10:90 to 99.

[0022] During the anti-reignition protection stage, the mass ratio of component A to component B is 1:0.2 to 0.8, and the mass ratio of the total mass of component A and component B to the mass of water is 1 to 10:90 to 99.

[0023] As can be seen from the above technical solution, compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Compared with existing aqueous film-forming foam fire extinguishing agents and other conventional foam fire extinguishing agents, the high-stability general-purpose environmentally friendly foam fire extinguishing agent obtained by the present invention has stronger gel foam stability, higher water retention performance, and a 25% liquid separation time of more than 24 hours. The foam formed can form a dense and stable foam layer on the burning oil surface, which can effectively inhibit the volatilization of flammable liquid vapors, effectively shorten the extinguishing time, significantly extend the anti-burning time, and improve the extinguishing efficiency.

[0025] 2. The crosslinking stabilizer used in this invention can both crosslink with the gel in component B to form a stable gel and form active hydroxyl titanium chelates in the presence of water, inhibiting the foam drainage rate and significantly improving foam stability, thus giving the foam extinguishing agent seawater resistance. The combined use of the crosslinking coupling agent and calcium chloride in the crosslinking stabilizer allows calcium ions and active hydroxyl titanium chelates formed in aqueous solution to lose water and form an insoluble solid film separator layer under the water separation effect of water-soluble flammable liquids. This protects the subsequently applied foam from damage by water-soluble liquids, enabling the extinguishing of water-soluble liquid fires with little or no addition of gel components. Furthermore, the use of the crosslinking stabilizer ensures that calcium ions and active hydroxyl titanium chelates are distributed on the surface of the foam liquid film, significantly improving the film strength and toughness, making it difficult for fuel vapors formed at the fuel-foam interface to penetrate the foam layer and escape, thereby greatly improving the extinguishing speed. The test results show that the highly stable, general-purpose, environmentally friendly foam fire extinguishing agent obtained by this invention has a fire extinguishing time of less than 90 seconds for both water-soluble and non-water-soluble liquid fires, and also has good fire extinguishing performance for various types of solid fires. It can achieve efficient extinguishing of Class A fires, non-water-soluble and water-soluble Class B fires, and has the characteristic of universality in fire extinguishing targets.

[0026] 3. Compared with other gel foam fire extinguishing agents, this invention does not require the addition of strong alkaline pH adjusters such as NaOH to adjust the pH value of the system to a specific value or range. It can achieve good gelation stability within a wider pH range, meeting the practical requirements of fire rescue teams. At the same time, the components are safer for production and user personnel.

[0027] 4. The requirements for the flowability and stability of fire extinguishing foam differ between high-efficiency fire extinguishing and long-term reignition resistance. To simultaneously meet the needs of high-efficiency fire extinguishing and long-term reignition resistance, the optimal component ratio for fire extinguishing and reignition resistance is determined by flexibly adjusting the ratio of component A and component B, resulting in fire extinguishing foams with different viscosities, stability, and flowability. This satisfies the versatility requirements of gel foam in different scenarios such as fire extinguishing, reignition resistance, and fire scene cleanup. The highly stable, general-purpose, and environmentally friendly foam fire extinguishing agent prepared by this invention can extinguish standard 2A woodpile fires within 30 seconds, and achieves the highest level of extinguishing both water-soluble liquid fires (AR IA level) and non-water-soluble liquid fires (IA level). Furthermore, the post-extinguishing fire resistance time is over 1 hour (compared to a maximum of only about 15 minutes for conventional foams), significantly improving the applicability and scenarios of gel foam fire extinguishing agents.

[0028] 5. Gel foam fire extinguishing agents, without the addition of any fluorinated surfactants, can achieve the same highest level of fire extinguishing performance (Level IA) as aqueous film-forming foam (AFFB) fire extinguishing agents. Furthermore, all other components used are easily degradable and low-toxicity, effectively balancing high-efficiency fire extinguishing and environmental friendliness, making it a good alternative to AFFB fire extinguishing agents. Test data shows that gel foam fire extinguishing agents contain no persistent organic pollutants, have a 28-day biodegradation rate >95%, and exhibit low biotoxicity to species such as zebrafish, algae, and luminescent bacteria. Its environmental performance is significantly superior to currently widely used AFFB fire extinguishing agents and other types of foam fire extinguishing agents. Detailed Implementation

[0029] This invention provides a highly stable, universal, environmentally friendly foam fire extinguishing agent, which comprises component A and component B.

[0030] In this invention, component A includes a foaming agent, a crosslinking stabilizer, a preservative, and water.

[0031] In this invention, the mass ratio of the foaming agent, crosslinking stabilizer, preservative and water is 15-27:23-35:0.1-0.3:37-62, preferably 18-25:25-32:0.15-0.25:40-60, more preferably 20-24:26-30:0.2:45-55, and even more preferably 22:28:0.2:50.

[0032] In this invention, component B includes a gelling agent, a dispersant, and a preservative.

[0033] In this invention, the mass ratio of the gelling agent, dispersant, and preservative is 25-55:45-75:0.4-0.8, preferably 30-50:50-70:0.5-0.7, more preferably 35-45:55-65:0.6, and even more preferably 40:60:0.6.

[0034] In this invention, the foaming agent in component A includes nonionic surfactants and amphoteric surfactants.

[0035] In this invention, the mass ratio of nonionic surfactant to amphoteric surfactant in the foaming agent is 1:0.8 to 4.2, preferably 1:1 to 4, further preferably 1:2 to 3, and even more preferably 1:2.5.

[0036] In this invention, the nonionic surfactant is an alkyl polysaccharide, which includes one or more of C6-8APG, C8-10APG, C10-12APG and C12-14APG.

[0037] In this invention, the amphoteric surfactant is betaine, which includes capryloamidopropyl betaine and / or lauryl hydroxysulfonyl betaine.

[0038] In this invention, the crosslinking stabilizer in component A includes a crosslinking coupling agent and calcium chloride.

[0039] In this invention, the mass ratio of the crosslinking coupling agent and calcium chloride in the crosslinking stabilizer is 0.8 to 6:1, preferably 1 to 5:1, more preferably 2 to 4:1, and even more preferably 3:1.

[0040] In this invention, the crosslinking coupling agent comprises diisopropyl di(triethanolamine) titanate and / or tetra(2-ethyl-1,3-hexanediol) titanate.

[0041] In this invention, the gelling agent in component B includes one or more of carboxymethyl hydroxypropyl guar gum, carboxymethyl guar gum, and hydroxypropyl guar gum.

[0042] In this invention, the dispersant in component B includes one or more of isopropanol, ethylene glycol, propylene glycol, and glycerol.

[0043] In this invention, the preservatives in components A and B independently include one or more of 1,2-benzisothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, and 5-chloro-2-methyl-4-isothiazolin-3-one.

[0044] In this invention, the preparation method of the highly stable general-purpose environmentally friendly foam fire extinguishing agent includes:

[0045] Component A: Component A is obtained by mixing foaming agent, crosslinking stabilizer, preservative and water;

[0046] Component B: Component B is obtained by mixing gelling agent, dispersant and preservative.

[0047] This invention also provides a method for using a highly stable, universal, environmentally friendly foam fire extinguishing agent, the method comprising the following steps:

[0048] Mix components A and B with water for fire extinguishing or fire suppression.

[0049] In this invention, during the fire extinguishing stage, the mass ratio of component A to component B is 1:0.07 to 0.15, preferably 1:0.08 to 0.14, more preferably 1:0.1 to 0.12, and even more preferably 1:0.11; the mass ratio of the total mass of component A and component B to the mass of water is 1 to 10:90 to 99, preferably 2 to 8:92 to 95, and more preferably 6:94.

[0050] In this invention, during the anti-reignition protection stage, the mass ratio of component A to component B is 1:0.2 to 0.8, preferably 1:0.3 to 0.7, more preferably 1:0.4 to 0.6, and even more preferably 1:0.5; the mass ratio of the total mass of component A and component B to the mass of water is 1 to 10:90 to 99, preferably 2 to 8:92 to 95, and more preferably 6:94.

[0051] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] Example 1

[0053] The extinguishing agent consists of component A, which comprises 4.5% C6-8APG (Yangzhou Chenhua New Material Co., Ltd. - APG0608) by mass, 13.5% capryloamidopropyl betaine, 22.5% diisopropyl di(triethanolamine)titanate, 7.5% calcium chloride, 0.15% 1,2-benzisothiazolin-3-one, and 51.85% water by mass. Component B comprises 40% carboxymethyl hydroxypropyl guar gum, 59.5% isopropanol, and 0.5% 1,2-benzisothiazolin-3-one by mass. During the controlled extinguishing phase, components A and B comprise 93% and 7% by mass, respectively. During the anti-reignition and protective cleanup phases, components A and B comprise 62.5% and 37.5% by mass, respectively. The mixture of components A and B is then mixed with water at a ratio of 6:94 in a proportioner to produce extinguishing foam.

[0054] Example 2

[0055] The extinguishing agent comprises component A, which consists of 13.9% C8-10APG, 11.1% lauryl hydroxysulfonate betaine, 20% tetra(2-ethyl-1,3-hexanediol) titanate, 5% calcium chloride, 0.1% 2-methyl-4-isothiazolin-3-one, and 49.9% water by mass. Component B consists of 35% carboxymethyl guar gum, 59.5% propylene glycol, and 0.7% 2-methyl-4-isothiazolin-3-one by mass. During the controlled extinguishing phase, components A and B comprise 90.9% and 9.1% by mass, respectively. During the anti-reignition and protective cleanup phases, components A and B comprise 71.4% and 28.6% by mass, respectively. The mixture of components A and B, when mixed with water at a ratio of 6:94 in a proportioner, foams to produce extinguishing foam.

[0056] Example 3

[0057] The extinguishing agent comprises component A, which consists of 10.8% C10-12APG, 16.2% lauryl hydroxysulfonate betaine, 12.5% ​​diisopropyl di(triethanolamine)titanate, 10.5% calcium chloride, 0.2% 5-chloro-2-methyl-4-isothiazolin-3-one, and 49.80% water by mass. Component B consists of 45% hydroxypropyl guar gum, 54.2% ethylene glycol, and 0.8% 5-chloro-2-methyl-4-isothiazolin-3-one by mass. During the controlled extinguishing phase, components A and B account for 91.5% and 8.5% by mass, respectively. During the anti-reignition and protective cleanup phases, components A and B account for 74.1% and 25.9% by mass, respectively. The mixture of components A and B is then mixed with water at a ratio of 6:94 in a proportioner to produce extinguishing foam.

[0058] Example 4

[0059] The extinguishing agent comprises: Component A (by mass percentage) 10% C12-14APG, 5% capryloamidopropyl betaine, 15.6% tetra(2-ethyl-1,3-hexanediol) titanate, 19.4% calcium chloride, 0.15% 1,2-benzisothiazolin-3-one, and 49.85% water; Component B (by mass percentage) 32% hydroxypropyl guar gum, 67.5% glycerol, and 0.5% 1,2-benzisothiazolin-3-one. During the controlled extinguishing phase, Component A and Component B comprise 88.5% and 11.5% by mass, respectively; during the anti-reignition and protective cleanup phases, they comprise 58.8% and 41.2% by mass, respectively. The mixture of these two components is then mixed with water at a ratio of 6:94 in a proportioner to produce extinguishing foam.

[0060] Comparative Example 1: Commercially available conventional aqueous film-forming foam extinguishing agent (6% (AFFF, -16℃) - seawater resistant, produced by Jiangsu Suolong Fire Protection Technology Co., Ltd.), whose fire extinguishing performance meets the highest level IA requirements in the national standard GB15308-2006 "Foam Extinguishing Agents".

[0061] Comparative Example 2: Commercially available conventional aqueous solvent-resistant film-forming foam extinguishing agent (6% (AFFF / AR, -11℃) - seawater resistant, produced by Jiangsu Suolong Fire Protection Technology Co., Ltd.), whose fire extinguishing performance meets the highest level IA (extinguishing non-water-soluble liquid fires, i.e. standard 120# oil fires) and AR IA (extinguishing water-soluble liquid fires, i.e. standard acetone fires) requirements in the national standard GB15308-2006 "Foam Extinguishing Agents".

[0062] The products of each embodiment of the present invention were tested in accordance with the national standards GB15308-2006 "Foam Fire Extinguishing Agents" and GB 27897-2011 "Class A Foam Fire Extinguishing Agents". The foam and physicochemical properties of Examples 1 to 4 and Comparative Examples 1 to 2 are shown in Table 1.

[0063] Table 1. Foaming and physicochemical properties of Examples 1-4 and Comparative Examples 1-2

[0064]

[0065]

[0066] As shown in the table above, the 25% separation time of the high-stability general-purpose environmentally friendly foam fire extinguishing agent of this invention exceeds 48 hours, and it has excellent wetting properties. The relevant technical indicators are far superior to those of the aqueous film-forming foam fire extinguishing agents and solvent-resistant aqueous film-forming foam fire extinguishing agents currently in use, and other relevant indicators also meet the product standard requirements.

[0067] Table 2 shows the fire extinguishing performance test data of the product conducted in accordance with the national standards GB15308-2006 "Foam Extinguishing Agents" and GB 27897-2011 "Class A Foam Extinguishing Agents". As per the standard, the fire extinguishing test was conducted first. After the foam application was completed, a burning anti-burning canister was added after a 5-minute wait, and the anti-burning test was then started. The fire extinguishing time and the 25% anti-burning time were recorded respectively.

[0068] Table 2 Fire extinguishing performance of Examples 1-4 and Comparative Examples 1-2

[0069]

[0070] (In the table, "-" indicates that the fire cannot be extinguished and that water-soluble liquid fires cannot be extinguished using conventional aqueous film-forming foam extinguishing agents.)

[0071] As can be seen from the data in Table 2, the extinguishing time of the high-stability general-purpose environmentally friendly foam fire extinguishing agent of this invention for Class A fires and water-soluble and non-water-soluble Class B fires is much shorter than that of the highest-performing aqueous film-forming foam fire extinguishing agent. Moreover, the 25% anti-burning time is more than 1.5-2 hours, which is about 10 times that of conventional foam fire extinguishing agents. This indicates that the patented product has outstanding advantages in fire extinguishing and anti-reignition performance.

[0072] The environmental performance test data of the product are shown in Table 3.

[0073] Table 3. Environmental performance data of the highly stable general-purpose environmentally friendly foam fire extinguishing agents in Examples 1-4.

[0074]

[0075] As shown in Table 3, the high-stability, general-purpose environmentally friendly foam fire extinguishing agent of this invention contains no persistent organic pollutants and has excellent environmental and safety performance. The relevant indicators far exceed the technical requirements of similar foreign products (currently, no relevant environmental performance requirements have been established in domestic product standards), indicating that this patented product has outstanding environmental and safety performance advantages.

[0076] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0077] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A highly stable, universal, environmentally friendly foam fire extinguishing agent, characterized in that, The highly stable, general-purpose, environmentally friendly foam fire extinguishing agent comprises component A and component B; Component A includes a foaming agent, a crosslinking stabilizer, a preservative, and water, wherein the mass ratio of the foaming agent, crosslinking stabilizer, preservative, and water is 15~27:23~35:0.1~0.3:37~62; Component B includes a gelling agent, a dispersant, and a preservative, wherein the mass ratio of the gelling agent, dispersant, and preservative is 25~55:45~75:0.4~0.8; The crosslinking stabilizer includes a crosslinking coupling agent and calcium chloride; The crosslinking coupling agent is diisopropyl di(triethanolamine) titanate or tetra(2-ethyl-1,3-hexanediol) titanate.

2. The highly stable, general-purpose, environmentally friendly foam fire extinguishing agent according to claim 1, characterized in that, The foaming agent in component A includes nonionic surfactants and amphoteric surfactants.

3. The highly stable, general-purpose, environmentally friendly foam fire extinguishing agent according to claim 2, characterized in that, The mass ratio of nonionic surfactant to amphoteric surfactant in the foaming agent is 1:0.8~4.2; The nonionic surfactant is an alkyl polysaccharide, and the amphoteric surfactant is betaine.

4. The highly stable, general-purpose, environmentally friendly foam fire extinguishing agent according to claim 3, characterized in that, The mass ratio of the crosslinking coupling agent to calcium chloride in the crosslinking stabilizer is 0.8~6:

1.

5. A highly stable, general-purpose, environmentally friendly foam fire extinguishing agent according to any one of claims 1 to 4, characterized in that, The gelling agent in component B includes one or more of carboxymethyl hydroxypropyl guar gum, carboxymethyl guar gum, and hydroxypropyl guar gum.

6. The highly stable, general-purpose, environmentally friendly foam fire extinguishing agent according to claim 5, characterized in that, The dispersant in component B includes one or more of isopropanol, ethylene glycol, propylene glycol, and glycerol.

7. The highly stable, general-purpose, environmentally friendly foam fire extinguishing agent according to claim 6, characterized in that, The preservatives in components A and B independently include one or more of 1,2-benzisothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, and 5-chloro-2-methyl-4-isothiazolin-3-one.

8. The method of using a highly stable, general-purpose, environmentally friendly foam fire extinguishing agent according to any one of claims 1 to 7, characterized in that, The usage method includes the following steps: Mix components A and B with water for fire extinguishing or fire suppression protection.

9. The method of using the highly stable, general-purpose, environmentally friendly foam fire extinguishing agent as described in claim 8, characterized in that, When extinguishing a fire, the mass ratio of component A to component B is 1:0.07~0.15, and the mass ratio of the total mass of component A and component B to the mass of water is 1~10:90~99. When performing anti-reignition protection, the mass ratio of component A to component B is 1:0.2~0.8, and the mass ratio of the total mass of component A and component B to the mass of water is 1~10:90~99.

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