A pollution-free and dischargeable foam fire extinguishing agent and its preparation method

Abstract

The present invention relates to the field of firefighting technology and provides a pollution-free, dischargeable foam fire extinguishing agent and a preparation method thereof. The raw materials of the foam fire extinguishing agent include the following components by weight: 1-10 parts methyl isobutyl carbinol, 1-3 parts hydrogenated phosphatidylcholine, 1-3 parts poloxamer, 5-10 parts titanium dioxide, 4-8 parts foam stabilizer, 0.5-1 part thickener, 2-4 parts cosolvent, and 70-80 parts water. This technical solution overcomes the problem of existing foam fire extinguishing agents containing fluorocarbon surfactants and having poor fire extinguishing performance.

Description

Technical Field

[0001] The present invention relates to the technical field of fire fighting, and in particular to a non-polluting and dischargeable foam fire extinguishing agent and a preparation method thereof. Background Art

[0002] Foam fire extinguishing agents are widely recognized as the most effective and commonly used means of extinguishing liquid fires. This is primarily due to the presence of fluorocarbon surfactants, which form a closed water film on the surface of hydrocarbon fuels during fire extinguishing, inhibiting fuel evaporation. However, fluorocarbon surfactants are persistent organic pollutants (POPs), are extremely stable, and are difficult to degrade, causing significant environmental pollution. This has significantly impacted the application of foam fire extinguishing agents.

[0003] Currently, both domestic and international efforts are focused on replacing fluorocarbon surfactants in foam firefighting agents with synthetic short-chain fluorocarbon surfactants. However, these surfactants still suffer from the problem of non-degradability. In the long term, the use of foam firefighting agents containing short-chain fluorocarbon surfactants still poses a potential environmental impact. Therefore, the development of a non-polluting, dischargeable foam firefighting agent is urgently needed. Summary of the Invention

[0004] The present invention provides a pollution-free and dischargeable foam fire extinguishing agent and a preparation method thereof, which solves the problem in the related art that the foam fire extinguishing agent contains fluorocarbon surfactants and has poor fire extinguishing performance.

[0005] The technical solutions of the present invention are as follows:

[0006] The invention provides a pollution-free and dischargeable foam fire extinguishing agent. The raw materials include the following components in parts by weight: 1-10 parts of methyl isobutyl carbinol, 1-3 parts of hydrogenated phosphatidylcholine, 1-3 parts of poloxamer, 5-10 parts of titanium dioxide, 4-8 parts of foam stabilizer, 0.5-1 part of thickener, 2-4 parts of cosolvent and 70-80 parts of water.

[0007] As a further technical solution, the mass ratio of the methyl isobutyl carbinol to hydrogenated phosphatidylcholine and poloxamer is 2-2.5:1:1.

[0008] When the mass ratio of methyl isobutyl carbinol to hydrogenated phosphatidylcholine and poloxamer is 2~3:1:1, it helps to further improve the stability of the foam and the fire extinguishing performance of the foam fire extinguishing agent.

[0009] As a further technical solution, the particle size of the titanium oxide is ≤1 μm.

[0010] When the particle size of titanium dioxide is ≤1 μm, it can effectively prevent the aggregation and coarsening of foam, thereby further improving the stability of the foam and further improving the fire extinguishing performance of the foam fire extinguishing agent.

[0011] As a further technical solution, the titanium oxide is modified titanium oxide, and the modified titanium oxide includes the following components: titanium oxide, ethylenediamine phosphate and xylitol.

[0012] As a further technical solution, the mass ratio of the titanium oxide, ethylenediamine phosphate and xylitol is 6-8:1:1.

[0013] When the mass ratio of titanium dioxide, ethylenediamine phosphate and xylitol is 6-8:1:1, the stability of the foam and the fire extinguishing performance of the foam fire extinguishing agent can be further enhanced.

[0014] As a further technical solution, the preparation method of the modified titanium dioxide is as follows: dissolving ethylenediamine phosphate and xylitol in water, adding titanium dioxide, dispersing uniformly, and evaporating to dryness to obtain the modified titanium dioxide.

[0015] As a further technical solution, the foam stabilizer is urea or alkyl glycoside.

[0016] The addition of foam stabilizers helps to enhance the stability of foam, thereby improving the fire extinguishing performance of foam fire extinguishing agents.

[0017] As a further technical solution, the thickener is one or more of xanthan gum, sodium metaphosphate, and hydroxymethyl starch.

[0018] The addition of thickeners can increase the viscosity and adhesion of foam fire extinguishing agents, prevent the fire from spreading further, and thus improve the fire extinguishing performance of foam fire extinguishing agents.

[0019] As a further technical solution, the co-solvent is one or more of ethylene glycol, ethylene glycol butyl ether, and ethylene glycol tert-butyl ether.

[0020] The addition of co-solvent can improve the stability and film-forming properties of the foam fire extinguishing agent, thereby improving the fire extinguishing performance of the foam fire extinguishing agent.

[0021] The present invention also provides a method for preparing the pollution-free and dischargeable foam fire extinguishing agent, comprising the following steps: adding a thickener and a cosolvent into water, mixing them evenly, adding other remaining components, mixing them evenly, and obtaining the foam fire extinguishing agent.

[0022] The working principle and beneficial effects of the present invention are:

[0023] 1. The foam fire extinguishing agent of the present invention does not contain fluorocarbon surfactants, reducing environmental pollution and achieving a pollution-free discharge effect. The methyl isobutyl carbinol, hydrogenated phosphatidylcholine, and poloxamer in the foam fire extinguishing agent act synergistically to effectively reduce the surface tension of water, promote foaming, and enhance foam stability, thereby improving the fire extinguishing performance of the foam fire extinguishing agent. Furthermore, the addition of titanium dioxide effectively enhances foam stability, thereby improving the fire extinguishing performance of the foam fire extinguishing agent.

[0024] 2. In the present invention, titanium dioxide is modified by using ethylenediamine phosphate and xylitol, thereby enhancing the dispersibility and wettability of titanium dioxide, thereby further improving the strength and stability of the foam, and further improving the fire extinguishing performance of the foam fire extinguishing agent. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0026] In the following examples and comparative examples, unless otherwise specified, the purity of methyl isobutyl carbinol is 99%, the purity of hydrogenated phosphatidylcholine is 98%, the purity of poloxamer is 99%, the particle size of titanium dioxide is 100 nm, the purity of ethylenediamine phosphate is 99%, the purity of xylitol is 98%, the nitrogen content of urea is 46.4 wt %, the purity of xanthan gum is 96%, and the purity of ethylene glycol is 98%.

[0027] Example 1

[0028] A method for preparing a pollution-free and dischargeable foam fire extinguishing agent comprises the following steps: dissolving, by weight, 0.5 parts of xanthan gum and 2 parts of ethylene glycol in 70 parts of water, mixing the mixture evenly, adding 1 part of methyl isobutyl carbinol, 1 part of hydrogenated phosphatidylcholine, 1 part of poloxamer, 5 parts of titanium dioxide and 4 parts of urea, and mixing the mixture evenly to obtain the foam fire extinguishing agent.

[0029] Example 2

[0030] A method for preparing a pollution-free and dischargeable foam fire extinguishing agent comprises the following steps: dissolving, by weight, 1 part of xanthan gum and 4 parts of ethylene glycol in 80 parts of water, mixing the mixture evenly, adding 10 parts of methyl isobutyl carbinol, 3 parts of hydrogenated phosphatidylcholine, 3 parts of poloxamer, 10 parts of titanium dioxide and 8 parts of urea, and mixing the mixture evenly to obtain the foam fire extinguishing agent.

[0031] Example 3

[0032] A method for preparing a pollution-free and dischargeable foam fire extinguishing agent comprises the following steps: dissolving, by weight, 0.5 parts of xanthan gum and 2 parts of ethylene glycol in 70 parts of water, mixing the mixture evenly, adding 2 parts of methyl isobutyl carbinol, 1 part of hydrogenated phosphatidylcholine, 1 part of poloxamer, 5 parts of titanium dioxide and 4 parts of urea, and mixing the mixture evenly to obtain the foam fire extinguishing agent.

[0033] Example 4

[0034] A method for preparing a pollution-free and dischargeable foam fire extinguishing agent comprises the following steps: dissolving, by weight, 1 part of xanthan gum and 4 parts of ethylene glycol in 80 parts of water, mixing the mixture evenly, adding 9 parts of methyl isobutyl carbinol, 3 parts of hydrogenated phosphatidylcholine, 3 parts of poloxamer, 10 parts of titanium dioxide and 8 parts of urea, and mixing the mixture evenly to obtain the foam fire extinguishing agent.

[0035] Example 5

[0036] The only difference between this embodiment and embodiment 4 is that, in this embodiment, the titanium oxide is modified titanium oxide;

[0037] The preparation method of the modified titanium dioxide is as follows: dissolving 1 part of ethylenediamine phosphate in 10 parts of water, adding 9 parts of titanium dioxide, dispersing the mixture evenly, and evaporating to dryness to obtain the modified titanium dioxide.

[0038] Example 6

[0039] The only difference between this embodiment and embodiment 5 is that in this embodiment, ethylenediamine phosphate is replaced by an equal amount of xylitol.

[0040] Example 7

[0041] The only difference between this embodiment and embodiment 5 is that in this embodiment, the preparation method of modified titanium dioxide is as follows: 0.5 parts of ethylenediamine phosphate and 0.5 parts of xylitol are dissolved in 10 parts of water, 9 parts of titanium dioxide are added, the mixture is evenly dispersed, and the mixture is evaporated to dryness to obtain modified titanium dioxide.

[0042] Example 8

[0043] The only difference between this embodiment and embodiment 5 is that in this embodiment, the preparation method of modified titanium dioxide is as follows: 1.5 parts of ethylenediamine phosphate and 1.5 parts of xylitol are dissolved in 10 parts of water, 7 parts of titanium dioxide are added, the mixture is evenly dispersed, and the mixture is evaporated to dryness to obtain modified titanium dioxide.

[0044] Example 9

[0045] The only difference between this embodiment and embodiment 7 is that in this embodiment, the preparation method of modified titanium dioxide is as follows: 1 part of ethylenediamine phosphate and 1 part of xylitol are dissolved in 10 parts of water, 8 parts of titanium dioxide are added, the mixture is evenly dispersed, and the mixture is evaporated to dryness to obtain modified titanium dioxide.

[0046] Example 10

[0047] The only difference between this embodiment and embodiment 7 is that in this embodiment, the preparation method of modified titanium dioxide is as follows: 1.25 parts of ethylenediamine phosphate and 1.25 parts of xylitol are dissolved in 10 parts of water, 7.5 parts of titanium dioxide are added, the mixture is evenly dispersed, and the mixture is evaporated to dryness to obtain modified titanium dioxide.

[0048] Comparative Example 1

[0049] The only difference between this comparative example and Example 1 is that in this comparative example, methyl isobutyl carbinol was not added, the weight portion of hydrogenated phosphatidylcholine added was 1.5 parts, and the weight portion of poloxamer added was 1.5 parts.

[0050] Comparative Example 2

[0051] The only difference between this comparative example and Example 1 is that in this comparative example, no hydrogenated phosphatidylcholine is added, the weight proportion of methyl isobutyl carbinol added is 1.5 parts, and the weight proportion of poloxamer added is 1.5 parts.

[0052] Comparative Example 3

[0053] The only difference between this comparative example and Example 1 is that in this comparative example, no poloxamer is added, the weight proportion of methyl isobutyl carbinol added is 1.5 parts, and the weight proportion of hydrogenated phosphatidylcholine added is 1.5 parts.

[0054] The following performance tests were performed on the foam fire extinguishing agents prepared in Examples 1 to 10 and Comparative Examples 1 to 3:

[0055] ①25% liquid extraction time: Test the 25% liquid extraction time in accordance with the test method for low-expansion foam liquid in GB 15308-2006 "Foam Fire Extinguishing Agents", where the ambient temperature is 20℃ and the foam temperature is 20℃;

[0056] ② Fire extinguishing time: Test the fire extinguishing time according to the strong release fire extinguishing test method in GB 15308-2006 "Foam Fire Extinguishing Agents".

[0057] The test results are shown in the following table.

[0058]

[0059] Comparison between Example 1 and Comparative Examples 1 to 3 shows that the synergistic effect of methyl isobutyl carbinol, hydrogenated phosphatidylcholine and poloxamer can effectively improve the stability of the foam and the fire extinguishing performance of the foam fire extinguishing agent.

[0060] Comparisons of Examples 1 and 3, and 2 and 4, show that a mass ratio of methyl isobutyl carbinol to hydrogenated phosphatidylcholine to poloxamer of 2-3:1:1 further improves foam stability and the fire-fighting performance of the foam fire-extinguishing agent. Comparisons of Examples 4-6 and 7 show that modifying titanium dioxide with ethylenediamine phosphate and xylitol further improves foam stability and the fire-fighting performance of the foam fire-extinguishing agent. Comparisons of Examples 7-8 and 9-10 show that a mass ratio of titanium dioxide to ethylenediamine phosphate to xylitol of 6-8:1:1 further enhances foam stability and the fire-fighting performance of the foam fire-extinguishing agent.

[0061] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pollution-free and dischargeable foam fire extinguishing agent, characterized in that: The raw materials include the following components in parts by weight: 1-10 parts of methyl isobutyl carbinol, 1-3 parts of hydrogenated phosphatidylcholine, 1-3 parts of poloxamer, 5-10 parts of titanium dioxide, 4-8 parts of foam stabilizer, 0.5-1 part of thickener, 2-4 parts of cosolvent and 70-80 parts of water.

2. The pollution-free and dischargeable foam fire extinguishing agent according to claim 1, characterized in that: The mass ratio of the methyl isobutyl carbinol to hydrogenated phosphatidylcholine and poloxamer is 2-3:1:

1.

3. The pollution-free and dischargeable foam fire extinguishing agent according to claim 1, characterized in that: The particle size of the titanium oxide is ≤1 μm.

4. The pollution-free and dischargeable foam fire extinguishing agent according to claim 1, characterized in that: The titanium oxide is modified titanium oxide, and the modified titanium oxide comprises the following components: titanium oxide, ethylenediamine phosphate and xylitol.

5. The pollution-free and dischargeable foam fire extinguishing agent according to claim 4, characterized in that: The mass ratio of the titanium oxide, ethylenediamine phosphate and xylitol is 6-8:1:

1.

6. The pollution-free and dischargeable foam fire extinguishing agent according to claim 5, characterized in that: The preparation method of the modified titanium dioxide comprises the following steps: dissolving ethylenediamine phosphate and xylitol in water, adding titanium dioxide, dispersing the mixture evenly, and evaporating and drying the mixture to obtain the modified titanium dioxide.

7. The pollution-free and dischargeable foam fire extinguishing agent according to claim 1, characterized in that: The foam stabilizer is urea or alkyl glycoside.

8. The pollution-free and dischargeable foam fire extinguishing agent according to claim 1, characterized in that: The thickener is one or more of xanthan gum, sodium metaphosphate, and hydroxymethyl starch.

9. The pollution-free and dischargeable foam fire extinguishing agent according to claim 1, characterized in that: The cosolvent is one or more of ethylene glycol, ethylene glycol butyl ether, and ethylene glycol tert-butyl ether.

10. A method for preparing the pollution-free and dischargeable foam fire extinguishing agent according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: adding a thickener and a cosolvent into water, mixing them evenly, adding other remaining components, mixing them evenly, and obtaining a foam fire extinguishing agent.

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