阅读说明：本技术 一种环保耐海水型水成膜泡沫灭火剂 (Environment-friendly seawater-resistant water film-forming foam extinguishing agent ) 是由 姜宁 余潇阳 陆守香 宗若雯 黎昌海 于 2019-09-29 设计创作，主要内容包括：本发明提供了一种环保耐海水型水成膜泡沫灭火剂,以重量百分比计,包括氟碳表面活性剂3～10％,碳氢表面活性剂3～25％,植物多糖0.1～4.5％,抗冻剂10～25％,抑菌剂0.1～1.5％,余量为水。本发明在上述含量的组分的相互作用下,使灭火剂具有优异灭火性能：起泡性能和稳定性能优异,表面张力低,铺展、灭火速度快,抗复燃时间长。与海水混合时其各项性能不受海水中无机盐的影响,特别适用于海上消防应用。灭火剂的表面张力为16.78～17.72mN/m；发泡倍数6.73～7.24；25％析液时间为2.9～3.3min；灭火时间(强施加)为37～42s；25％抗烧时间(强施加)为11.4～16.5min。(The invention provides an environment-friendly seawater-resistant aqueous film-forming foam extinguishing agent which comprises, by weight, 3-10% of fluorocarbon surfactant, 3-25% of hydrocarbon surfactant, 0.1-4.5% of plant polysaccharide, 10-25% of antifreeze agent, 0.1-1.5% of bacteriostatic agent and the balance of water. Under the interaction of the components with the content, the fire extinguishing agent has excellent fire extinguishing performance: excellent foaming performance and stability, low surface tension, fast spreading and fire extinguishing speed and long re-burning resisting time. When the water-soluble fire-fighting agent is mixed with seawater, various performances of the water-soluble fire-fighting agent are not influenced by inorganic salts in the seawater, and the water-soluble fire-fighting agent is particularly suitable for offshore fire-fighting application. The surface tension of the fire extinguishing agent is 16.78-17.72 mN/m; the foaming ratio is 6.73-7.24; the 25% liquid separating time is 2.9-3.3 min; the fire extinguishing time (strong application) is 37-42 s; the 25% burn-resistant time (strong application) is 11.4-16.5 min.)

1. An environment-friendly seawater-resistant water film-forming foam extinguishing agent comprises, by weight, 3-10% of a fluorocarbon surfactant, 3-25% of a hydrocarbon surfactant, 0.1-4.5% of plant polysaccharide, 10-25% of an antifreeze agent, 0.1-1.5% of a bacteriostatic agent and the balance of water.

2. Fire extinguishing agent according to claim 1, characterized in that the fluorocarbon surfactant is selected from amphoteric perfluoroalkyl betaines and/or anionic perfluorodiethanolamine neutralizing phosphates.

3. Fire extinguishing agent according to claim 2, characterized in that the amphoteric perfluoroalkyl betaine is of a type selected from Chemguard^TM S-500；

The anionic perfluorinated diethanolamine neutralized phosphate ester is selected from DuPont^TM FS-60。

4. Fire extinguishing agent according to claim 1, characterized in that the hydrocarbon surfactant is selected from oligomeric D-glucopyranose nonionic surfactants and/or cocamidopropyl dimethylbetaine amphoteric surfactants.

5. Fire extinguishing agent according to claim 1, characterized in that the plant polysaccharide is selected from one or more of xanthan gum, 6-deoxy-L-galactose and locust bean gum.

6. fire extinguishing agent according to claim 1, characterized in that the anti-freeze agent is selected from one or more of 1, 2-diethylidene alcohol, dihydroxydiethyl ether and tetraglyme.

7. Fire extinguishing agent according to claim 1, characterized in that the bacteriostatic agent is selected from potassium 2, 4-hexadienoate and/or sodium bisacetate.

8. the fire extinguishing agent according to claim 1, wherein the fire extinguishing agent comprises 3% of fluorocarbon surfactant, 18% of hydrocarbon surfactant;

Or 3% of fluorocarbon surfactant and 3% of hydrocarbon surfactant.

Technical Field

The invention belongs to the technical field of fire extinguishing agents, and particularly relates to an environment-friendly seawater-resistant water film-forming foam extinguishing agent.

background

The water film-forming foam extinguishing agent is a main extinguishing agent for extinguishing liquid fire, can quickly form a water film on the surface of certain hydrocarbon liquid, has the double extinguishing functions of foam and the water film, and is recognized as an extinguishing agent with the best performance aiming at oil fire in the world. Due to the excellent performance of the aqueous film-forming foam extinguishing agent, the aqueous film-forming foam extinguishing agent is widely applied to offshore oil fields, ships, civil ships, cruise ships and other places. When used in these applications, aqueous film-forming foam stock solutions are inevitably mixed with seawater to produce foam solutions. However, the presence of large amounts of inorganic salts in seawater can affect the foamability and stability of the foam, further affecting the fire-fighting effect of the foam.

In the prior art, the addition of chelating agents to the formulation has been widely used to improve the sea water resistance of the foam solution, and the research of obtaining a sea water resistant formulation by replacing the original components in the formulation has been reported so far.

Disclosure of Invention

In view of the above, the present invention aims to provide an environmentally friendly seawater-resistant aqueous film-forming foam fire extinguishing agent having excellent fire extinguishing performance.

The invention provides an environment-friendly seawater-resistant aqueous film-forming foam extinguishing agent which comprises, by weight, 3-10% of fluorocarbon surfactant, 3-25% of hydrocarbon surfactant, 0.1-4.5% of plant polysaccharide, 10-25% of antifreeze agent, 0.1-1.5% of bacteriostatic agent and the balance of water.

Preferably, the fluorocarbon surfactant is selected from amphoteric perfluoroalkyl betaines and/or anionic perfluorodiethanolamine neutralizing phosphate esters.

Preferably, the amphoteric perfluoroalkyl betaine is of a type selected from Chemguard^TM S-500；

The anionic perfluorinated diethanolamine neutralized phosphate ester is selected from DuPont^TM FS-63。

Preferably, the hydrocarbon surfactant is an oligomeric D-glucopyranose nonionic surfactant and/or a cocamidopropyl dimethylbetaine amphoteric surfactant.

Preferably, the plant polysaccharide is one or more of xanthan gum, 6-deoxy-L-galactose and locust bean gum.

Preferably, the anti-freeze agent is selected from one or more of 1, 2-diethylidene alcohol, dihydroxydiethyl ether and tetraglyme.

Preferably, the bacteriostatic agent is selected from potassium 2, 4-hexadienoate and/or sodium diacetate.

preferably, the fire extinguishing agent contains 3% of fluorocarbon surfactant and 18% of hydrocarbon surfactant;

Or 3% of fluorocarbon surfactant and 3% of hydrocarbon surfactant.

the invention provides an environment-friendly seawater-resistant aqueous film-forming foam extinguishing agent which comprises, by weight, 3-10% of fluorocarbon surfactant, 3-25% of hydrocarbon surfactant, 0.1-4.5% of plant polysaccharide, 10-25% of antifreeze agent, 0.1-1.5% of bacteriostatic agent and the balance of water. The invention enables the fire extinguishing agent to have excellent fire extinguishing performance under the interaction of the components with the content. The fire extinguishing agent has excellent foaming performance and stability, low surface tension, high spreading and fire extinguishing speed and long re-burning resisting time. When the water-soluble fire-fighting agent is mixed with seawater, various performances of the water-soluble fire-fighting agent are not influenced by inorganic salts in the seawater, and the water-soluble fire-fighting agent is particularly suitable for offshore fire-fighting application. The experimental results show that: the surface tension of the fire extinguishing agent is 16.78-17.72 mN/m; the pH value is 7.2-8.1; the foaming ratio is 6.73-7.24; the 25% liquid separating time is 2.9-3.3 min; the fire extinguishing time (strong application) is 37-42 s; the 25% burn-resistant time (strong application) is 11.4-16.5 min.

Detailed Description

The invention provides an environment-friendly seawater-resistant aqueous film-forming foam extinguishing agent which comprises, by weight, 3-10% of fluorocarbon surfactant, 3-25% of hydrocarbon surfactant, 0.1-4.5% of plant polysaccharide, 10-25% of antifreeze agent, 0.1-1.5% of bacteriostatic agent and the balance of water.

The environmentally-friendly seawater-resistant water film-forming foam extinguishing agent comprises 3-10% by weight of fluorocarbon surfactant, and preferably 3-5% by weight of fluorocarbon surfactant. The fluorocarbon surfactant is the main component of the fire extinguishing agent, is not easy to enrich in the environment and in organisms, does not cause the problem of environmental pollution, and can ensure that the formula has lower surface tension and good spreading performance. The fluorocarbon surfactant is not affected by seawater inorganic salts. The fluorocarbon surfactant is preferably selected from amphoteric perfluoroalkyl betaines and/or anionicPerfluorodiethanolamine neutralizes the phosphate. The amphoteric perfluoroalkyl betaine is of Chemguard type^TMS-500; the anionic perfluorinated diethanolamine neutralized phosphate ester is selected from DuPont^TMFS-60. In a specific embodiment, the fluorocarbon surfactant is a mixture of S-500 and FS-60 in a mass ratio of 2: 1.

The fire extinguishing agent provided by the invention comprises 3-25% of hydrocarbon surfactant, and preferably 3-18%. The hydrocarbon surfactant is the main foaming agent of the invention, which can provide abundant foam and can also reduce the interfacial tension between the fuel and the foam solution. The hydrocarbon surfactant is not affected by seawater inorganic salts. The hydrocarbon surfactant is preferably selected from oligomeric D-glucopyranose nonionic surfactants and/or cocamidopropyl dimethylethyl betaine amphoteric surfactants. In specific embodiments, the hydrocarbon surfactant accounts for 18% or 3% of the fire extinguishing agent.

The fire extinguishing agent provided by the invention comprises 0.1-4.5% of plant polysaccharide, preferably 0.3-3%. The plant polysaccharide is preferably selected from one or more of xanthan gum, 6-deoxy-L-galactose and locust bean gum. The plant polysaccharide can improve the stability and burning resistance of the foam of the fire extinguishing agent. In a specific embodiment, the plant polysaccharide accounts for 0.3% of the weight of the fire extinguishing agent.

The fire extinguishing agent provided by the invention comprises 10-25% of anti-freezing agent, and preferably 13-20%. The anti-freeze agent is preferably selected from one or more of 1, 2-diethylidene alcohol, dihydroxydiethyl ether and tetraglyme. In the specific embodiment of the invention, the antifreeze agent is 10: 3 of 1, 2-diethyleneol and dihydroxydiethylether. In a specific embodiment, the antifreeze agent accounts for 13% of the fire extinguishing agent by weight.

The fire extinguishing agent provided by the invention comprises 0.1-1.5% of bacteriostatic agent, preferably 0.4-1.0%. The bacteriostatic agent is preferably selected from potassium 2, 4-hexadienoate and/or sodium diacetate. In a specific embodiment, the bacteriostatic agent accounts for 0.4% of the fire extinguishing agent by weight.

The present invention provides a fire extinguishing agent comprising a balance of water.

In the invention, the fire extinguishing agent contains 3% of fluorocarbon surfactant and 18% of hydrocarbon surfactant;

Or 3% of fluorocarbon surfactant and 3% of hydrocarbon surfactant.

In the present invention, the fire extinguishing agent is preferably composed of the following raw materials:

S-5002%, FS-601%, oligomeric D-glucopyranose 18%, 1, 2-diethylidene alcohol 10%, dihydroxy diethyl ether 3%, xanthan gum 0.3%, sodium hydrogen diacetate 0.4%, and the balance of water;

or S-5002%, FS-601%, oligomeric D-glucopyranose 18%, 1, 2-diethylidene alcohol 10%, dihydroxy diethyl ether 3%, xanthan gum 0.3%, sodium hydrogen diacetate 0.4%, and water in balance;

Or S-5002%, FS-601%, cocamidopropyl dimethyl ethyl betaine 3%, 1, 2-diethylidene alcohol 10%, dihydroxy diethyl ether 3%, xanthan gum 0.3%, sodium hydrogen diacetate 0.4%, and water in balance;

Or S-5002%, FS-601%, cocamidopropyl dimethyl ethyl betaine 3%, 1, 2-diethylidene alcohol 10%, dihydroxy diethyl ether 3%, xanthan gum 0.3%, sodium hydrogen diacetate 0.4%, and water in balance.

In the invention, the environment-friendly seawater-resistant water film-forming foam extinguishing agent is preferably prepared by the following method:

mixing a fluorocarbon surfactant, a hydrocarbon surfactant and an antifreeze agent to obtain a first mixture; dissolving the first mixture in part of water, and uniformly stirring to obtain a first mixture solution;

Mixing plant polysaccharide and bacteriostatic agent to obtain a second mixture;

And mixing the second mixture with the first mixture solution, and adding the rest of water to obtain the environment-friendly seawater-resistant water film-forming foam extinguishing agent.

In the invention, when in use, the fire extinguishing agent is preferably mixed with water according to the mass ratio of 3:97 to prepare a solution for extinguishing fire.

The fire extinguishing agent belongs to non-temperature sensitive foam liquid.

For further illustration of the present invention, the following examples are provided to describe the environmentally friendly seawater resistant type aqueous film forming foam fire extinguishing agent of the present invention in detail, but they should not be construed as limiting the scope of the present invention.