Clean chemical gas emulsion fire extinguishing agent and preparation method thereof

Abstract

The present application belongs to the technical field of new fire extinguishing agent, and particularly relates to a clean chemical gas emulsion fire extinguishing agent and a preparation method thereof. The clean chemical gas emulsion fire extinguishing agent is prepared from the following raw materials according to the mass percentage: clean chemical gas fire extinguishing agent (10-80%), emulsifier (0.5-5%), stabilizer (0.5-2%), anti-rust agent (0.5-1%), and the rest is water. The clean chemical gas emulsion fire extinguishing agent has the advantages of high fire extinguishing efficiency, strong heat absorption capacity, and the like, and can quickly extinguish surface fire and deep fire, and has the characteristics of storage stability, uniform emulsification, corrosion resistance, and the like. In addition, the preparation method of the emulsion fire extinguishing agent is simple to operate, easy to realize, and suitable for promotion and application.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of new fire extinguishing agent, and particularly relates to a clean chemical gas emulsion fire extinguishing agent and a preparation method thereof. BACKGROUND

[0002] The new generation of chemical fire extinguishing gas represented by bromotrifluoropropene (BTP) and perfluorohexanone is an excellent substitute for halon fire extinguishing agent. This kind of fire extinguishing agent is not only efficient but also clean and environmentally friendly. For example, bromotrifluoropropene (BTP) contains bromine and fluorine elements and groups in its molecule, which can cut off the combustion chain reaction during the action of the fire extinguishing agent and the flame, quickly extinguish the surface fire by chemical fire extinguishing, and has high efficiency. Moreover, the carbon-carbon double bond contained in the molecular structure of the fire extinguishing agent can be easily degraded in the atmospheric environment, and the short atmospheric survival life makes the fire extinguishing agent unable to enter the ozone layer to cause damage. At present, these high-boiling-point clean and efficient chemical gas fire extinguishing agents have achieved certain application in the fields of aviation and marine, and have great potential for application and development in the future.

[0003] In the process of extinguishing fire, in addition to chemical fire extinguishing, the fire extinguishing agent can also reduce the temperature of the fire area by physical actions such as gasification or vaporization to assist in extinguishing fire. This kind of temperature reduction has a very good effect on extinguishing deep-seated fires of flammable solids such as wood and special types of fires such as lithium battery fires. The clean and efficient chemical gas fire extinguishing agent represented by bromotrifluoropropene (BTP) and perfluorohexanone performs unsatisfactorily in terms of heat absorption and temperature reduction. For example, the vaporization enthalpy of bromotrifluoropropene (BTP) is only about 150 J / g, which is less than one-tenth of the vaporization enthalpy of water (about 2400 J / g), and the heat absorption and temperature reduction effect in the process of extinguishing fire is very limited, which may lead to the failure of single clean chemical gas fire extinguishing agent to successfully extinguish deep-seated fires of flammable solids, or poor performance in extinguishing special types of fires such as lithium battery fires, and inability to prevent secondary combustion of fire. In order to solve the problem of limited heat absorption and temperature reduction of clean chemical gas fire extinguishing agent, it can be tried to compound it with water which has outstanding heat absorption and temperature reduction performance, to prepare a new type of composite fire extinguishing agent with excellent chemical fire extinguishing and heat absorption and temperature reduction effects. Since the clean chemical gas fire extinguishing agent and water are not mutually soluble, it is of great significance to optimize the comprehensive performance of the clean chemical gas fire extinguishing agent and reduce the cost of the fire extinguishing agent to prepare a new type of emulsion fire extinguishing agent with stable emulsification and uniform dispersion. SUMMARY

[0004] Therefore, the present application provides a clean chemical gas emulsion fire extinguishing agent and a preparation method thereof in view of the deficiencies of the prior art.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A clean chemical gas emulsion fire extinguishing agent, the emulsion fire extinguishing agent is prepared from the following raw materials according to the mass percentage:

[0007] Clean chemical gas fire extinguishing agent 10%-80%;

[0008] Emulsifier 0.5%-5%;

[0009] Stabilizer 0.5%-2%;

[0010] Rust inhibitor 0.5%-1%;

[0011] The rest is water.

[0012] Optionally, the clean chemical gas fire extinguishing agent and water in the emulsion fire extinguishing agent are both fire extinguishing media, and the effective fire extinguishing component is not less than 92%.

[0013] Optionally, the clean chemical gas fire extinguishing agent is a high-boiling-point chemical fire extinguishing gas, specifically bromine trifluoro propylene (BTP), which has the characteristics of high fire extinguishing efficiency, environmental friendliness, no residue after application, etc., and is in liquid state at room temperature and easy to gasify.

[0014] Optionally, the emulsifier is an environmentally friendly anionic fluorocarbon surfactant, specifically one of low-carbon-chain perfluorocarboxylate, perfluorophosphate and derivatives thereof with carbon atom number ≤6.

[0015] Optionally, the stabilizer is one or more of xanthan gum, isopropyl alcohol and polyethylene glycol; and the rust inhibitor is one or more of triethanolamine borate, modified borate and octanoic acid dicyclohexylamine.

[0016] It should be noted that the clean chemical gas emulsion fire extinguishing agent of the present application is storage stable, and when left for a long time, slow stratification may occur, but the uniformly dispersed emulsion fire extinguishing agent can be restored by slight shaking or shaking when used.

[0017] The clean chemical gas emulsion fire extinguishing agent of the present application has the advantages of high fire extinguishing efficiency and strong heat absorption capacity, and can quickly extinguish surface fire and deep fire, and effectively inhibit the occurrence of combustible material rekindling.

[0018] Specifically, the main fire extinguishing principle of the present application is as follows:

[0019] After the fire extinguishing agent is sprayed, the clean chemical gas fire extinguishing agent, bromotrifluoropropene (BTP), is rapidly gasified and diffused, mainly plays a chemical fire extinguishing role, captures active groups such as H· and HO· in the flame, and cuts off the combustion chain reaction, so that the flame is quickly and effectively extinguished, and the surface fire is extinguished. At the same time, another fire extinguishing agent compounded with bromotrifluoropropene, water, is mainly in the form of liquid, part of which will irrigate or infiltrate into the combustible material, and extinguish the flame by cooling, suffocation and the like. Another part will be vaporized by heat absorption, and the extinguishing effect will be enhanced by cooling and dilution, so that the deep fire is effectively extinguished and the rekindling is prevented.

[0020] The application also requests the preparation method of the clean chemical gas emulsion fire extinguishing agent, and specifically comprises the following steps:

[0021] First, the clean chemical gas fire extinguishing agent is added to water, then the environmentally friendly anionic fluorocarbon surfactant is added, and then oscillation and dispersion are carried out, and then the stabilizer and the rust inhibitor are sequentially added, and then oscillation and dispersion are carried out again, so that the clean chemical gas emulsion fire extinguishing agent is finally formed.

[0022] Compared with the prior art, the clean chemical gas emulsion fire extinguishing agent and the preparation method thereof provided by the application have the following excellent effects:

[0023] The fire extinguishing agent prepared by the application is a new type of fire extinguishing agent formed by compounding a clean chemical gas fire extinguishing agent with water, that is, a clean chemical gas emulsion fire extinguishing agent. The greenhouse effect problem brought by the application can be ignored, and the ozone layer will not be damaged, so the application belongs to an environmentally friendly fire extinguishing agent. At the same time, the raw materials required by the emulsion fire extinguishing agent disclosed by the application are easy to obtain, the cost is low, and the preparation method is simple and easy to operate, so the application is suitable for popularization and application. DETAILED DESCRIPTION

[0024] The technical solutions claimed by the application will be described clearly and completely in combination with the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the application.

[0025] The application discloses a preparation method of a clean chemical gas emulsion fire extinguishing agent.

[0026] In order to better understand the application, the application will be further specifically described by the following embodiments, but it cannot be understood as a limitation of the application. Some non-essential improvements and adjustments made by those skilled in the art based on the above application content are also regarded as falling within the protection scope of the application.

[0027] Hereinafter, the technical solutions of the present application will be further described with specific examples.

[0028] Example 1

[0029] The clean chemical gas emulsion extinguishing agent is made of the following raw materials in percentage by mass:

[0030] Bromotrifluoropropene (BTP) 30%;

[0031] Perfluorohexane carboxylate 1%;

[0032] Xanthan gum 0.5%;

[0033] Triethanolamine borate 0.5%;

[0034] The balance is water.

[0035] The clean chemical gas emulsion extinguishing agent and its preparation method include the following steps:

[0036] A certain amount of water is weighed and a measured amount of clean chemical gas extinguishing agent is added thereto, followed by adding a measured amount of perfluorohexane carboxylate surfactant. An oscillator is used to shake for 5 min at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 28℃ to disperse them. Then a measured amount of xanthan gum and triethanolamine borate are added in turn, and they are shaken again for 2 min under the same conditions until they are mixed uniformly, thereby obtaining the clean chemical gas emulsion extinguishing agent.

[0037] Example 2

[0038] The clean chemical gas emulsion extinguishing agent is made of the following raw materials in percentage by mass:

[0039] Bromotrifluoropropene (BTP) 50%;

[0040] Perfluorohexane carboxylate 1%;

[0041] Xanthan gum 0.5%;

[0042] Triethanolamine borate 0.5%;

[0043] The balance is water.

[0044] The clean chemical gas emulsion extinguishing agent and its preparation method include the following steps:

[0045] Take a certain amount of water, and add a measured amount of clean chemical gas fire extinguishing agent, followed by a measured amount of perfluorohexane carboxylate surfactant, using a shaker, at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 28°C, shake for 5 min to disperse, then add a measured amount of xanthan gum and triethanolamine borate in turn, and shake again for 2 min under the same conditions until mixed evenly, to obtain the clean chemical gas emulsion fire extinguishing agent.

[0046] Example 3

[0047] The clean chemical gas emulsion fire extinguishing agent is prepared from the following raw materials in the following mass percentages:

[0048] Monobromotrifluoropropene (BTP) 50%;

[0049] Perfluorohexane carboxylate 1%;

[0050] Xanthan gum 1%;

[0051] Triethanolamine borate 0.5%;

[0052] The balance is water.

[0053] The clean chemical gas emulsion fire extinguishing agent and its preparation method include the following steps:

[0054] Take a certain amount of water, and add a measured amount of clean chemical gas fire extinguishing agent, followed by a measured amount of perfluorohexane carboxylate surfactant, using a shaker, at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 28°C, shake for 5 min to disperse, then add a measured amount of xanthan gum and triethanolamine borate in turn, and shake again for 2 min under the same conditions until mixed evenly, to obtain the clean chemical gas emulsion fire extinguishing agent.

[0055] Example 4

[0056] The clean chemical gas emulsion fire extinguishing agent is prepared from the following raw materials in the following mass percentages:

[0057] Monobromotrifluoropropene (BTP) 50%;

[0058] Perfluorohexane carboxylate 1%;

[0059] Isopropyl alcohol 0.5%;

[0060] Triethanolamine borate 0.5%;

[0061] The balance is water.

[0062] The clean chemical gas emulsion fire extinguishing agent and its preparation method include the following steps:

[0063] A certain amount of water is weighed and a measured amount of clean chemical gas extinguishing agent is added, followed by a measured amount of perfluorohexane carboxylate surfactant, which is dispersed using a shaker at a shaking frequency of 200 times / min, a shaking amplitude of 20 mm, and a temperature of 28°C for 5 min, and then a measured amount of xanthan gum and triethanolamine borate is added in turn, and shaken again under the same conditions for 2 min until mixed uniformly, to obtain the clean chemical gas emulsion extinguishing agent.

[0064] Comparative Example 1

[0065] In this comparative example 1, all reagents in Example 1, including perfluorohexane carboxylate, xanthan gum, triethanolamine borate and water, are replaced with an equal amount of monobromotrifluoropropene (BTP).

[0066] Comparative Example 2

[0067] In this comparative example 2, all reagents in Example 1, including monobromotrifluoropropene (BTP), perfluorohexane carboxylate, xanthan gum and triethanolamine borate, are replaced with an equal amount of water.

[0068] The clean chemical gas emulsion extinguishing agent prepared in the above examples and the pure water and pure monobromotrifluoropropene (BTP) extinguishing agent in the comparative examples are tested for extinguishing performance. The test conditions are as follows: in a self-designed and processed 1m x 1m x 1m semi-open extinguishing room, n-heptane fire, ethanol fire and wood pile fire are tested for extinguishing, and the extinguishing nozzle is placed at the top center of the extinguishing room directly above the fire pan. Among them, the n-heptane fire and the ethanol fire use a fire pan with a diameter of 10 cm, and the extinguishing agent is applied after pre-burning for 60 s, and the time when the n-heptane fire and the ethanol fire are extinguished and whether there is a relighting are recorded; the wood pile used for the wood pile fire is stacked by seven layers of pine, each layer has four square woods, the cross-sectional area of the square wood is 2cm x 2cm, and the length is 14cm, 20mL of n-heptane is used to ignite during the test, and the extinguishing agent is applied when the mass loss of the wood pile is 50%, and the time when the wood pile fire is extinguished and whether there is a relighting are recorded. The test results are shown in Table 1.

[0069] Table 1 Performance test.

[0070]

[0071] From the test results in Table 1 above, it can be seen that the clean chemical gas emulsion extinguishing agent of the present application has the characteristics of high efficiency in extinguishing, and can effectively prevent fire from relighting.

[0072] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the appended claims are intended to cover all such modifications that do not depart from the true spirit and scope of the application. Therefore, the application is not limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A clean chemical gas emulsion fire extinguishing agent, characterized in that, The emulsion fire extinguishing agent is formulated from the following raw materials in the following mass percentages: Clean chemical gas extinguishing agent 10%-80%; Emulsifier 0.5%-5%; Stabilizer 0.5%-2%; Rust inhibitor 0.5%-1%; The rest is water; The emulsifier is an environmentally friendly anionic fluorocarbon surfactant, specifically one of a low-carbon chain perfluorocarboxylate or perfluorophosphate with ≤6 carbon atoms; The stabilizer is one or more of xanthan gum, isopropanol, and polyethylene glycol; The rust inhibitor is one or more of triethanolamine borate and dicyclohexyl octanoate; The clean chemical gas extinguishing agent is monobromotrifluoropropylene.

2. A method for preparing a clean chemical gas emulsion fire extinguishing agent as described in claim 1, characterized in that, First, add the clean chemical gas extinguishing agent to the water, then add the environmentally friendly anionic fluorocarbon surfactant, shake to disperse, then add the stabilizer and rust inhibitor in sequence, shake again to disperse until evenly mixed, so as to finally form the clean chemical gas emulsion extinguishing agent.

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