Low-temperature-resistant foam extinguishing agent, preparation method thereof and extinguishing device

Abstract

The application relates to the technical field of fire extinguishing agents, and discloses a low-temperature-resistant foam fire extinguishing agent, a preparation method thereof and a fire extinguishing device. The low-temperature-resistant foam fire extinguishing agent contains the following components: a hydrocarbon surfactant, a fluorocarbon surfactant, diethylene glycol monobutyl ether, urea, benzotriazole, an alcohol compound and water; the alcohol compound is trifluoroethanol and ethylene glycol with a content mass ratio of 1:1-6. The low-temperature-resistant foam fire extinguishing agent provided by the application has a lower freezing point, the fire extinguishing performance meets the IA standard of GB15308-2006, is pollution-free to the environment, can be stably stored for a long time, and can better meet the application in the technical field of fire extinguishing agents.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing agent technology, specifically to a low-temperature resistant foam fire extinguishing agent, its preparation method, and a fire extinguishing device. Background Technology

[0002] Aqueous film-forming foam (AFFO) extinguishing agents were introduced in the 1960s. Due to their excellent effectiveness in extinguishing hydrocarbon fires, they have been widely used to extinguish flammable liquid fires. The main components of AFFO generally include hydrocarbon surfactants, fluorocarbon surfactants, foam stabilizers, flame retardants, corrosion inhibitors, and co-solvents.

[0003] Aqueous film-forming foam extinguishing agents typically have a freezing point of around -10°C, while temperatures in northern winters can drop to tens of degrees below zero. This makes foam extinguishing agents prone to freezing at low temperatures, affecting storage and use. Therefore, low-temperature resistant foam extinguishing agents are required under low-temperature conditions.

[0004] The preparation of low-temperature foam fire extinguishing agents often requires the introduction of antifreeze agents. Commonly used antifreeze agents are polyols, chlorides, phosphates, and sulfates.

[0005] In the existing technology, low-temperature foam fire extinguishing agents have the following disadvantages:

[0006] 1. In order to achieve ultra-low temperature cooling effect, low temperature foam fire extinguishing agents use trifluorochloromethane as a refrigerant. However, trifluorochloromethane will destroy the ozone layer and is not an environmentally friendly material.

[0007] Second, some foam fire extinguishing agents often add triethanolamine phosphate as an antifreeze to achieve an ultra-low freezing point. However, fire extinguishing agents with triethanolamine phosphate often have instability problems, which leads to reduced fire extinguishing effect or even deterioration of the fire extinguishing agent.

[0008] Third, there are very few existing low-temperature foam extinguishing agents with a freezing point below -40℃, which cannot meet the requirements for use in extreme environments and greatly limits the promotion of foam extinguishing agents.

[0009] Fourth, using a single inorganic salt as an antifreeze agent often affects the performance of the fire extinguishing agent. For example, chloride ions in chlorides can corrode equipment, and sodium sulfate generated from sulfates is easily precipitated at low temperatures.

[0010] Therefore, the existing technology still needs further improvement and development. Summary of the Invention

[0011] The purpose of this invention is to solve the above-mentioned problems existing in the prior art and to provide a novel low-temperature resistant foam fire extinguishing agent.

[0012] To achieve the above objectives, a first aspect of the present invention provides a low-temperature resistant foam fire extinguishing agent, which contains the following components:

[0013] Hydrocarbon surfactants, fluorocarbon surfactants, diethylene glycol monobutyl ether, urea, benzotriazole, alcohols and water;

[0014] The alcohol compounds are trifluoroethanol and ethylene glycol in a mass ratio of 1:1-6;

[0015] Based on the total weight of the low-temperature resistant foam extinguishing agent, the content of the hydrocarbon surfactant is 10-30 wt%, the content of the fluorocarbon surfactant is 3-6 wt%, the content of diethylene glycol monobutyl ether is 3-6 wt%, the content of urea is 5-10 wt%, the content of benzotriazole is 0.1-0.3 wt%, the content of alcohol compounds is 25-45 wt%, and the content of water is 25-35 wt%.

[0016] A second aspect of the present invention provides a method for preparing the low-temperature resistant foam fire extinguishing agent described in the first aspect, the method comprising:

[0017] (1) Water, fluorocarbon surfactant, and hydrocarbon surfactant are mixed in a first contact to obtain intermediate material I; and

[0018] An alcohol compound and diethylene glycol monobutyl ether are mixed to obtain a mixture; the alcohol compound is trifluoroethanol and ethylene glycol in a mass ratio of 1:1-6.

[0019] (2) The urea, benzotriazole, intermediate material I and the mixture are subjected to a second contact mixing to obtain the low-temperature resistant foam fire extinguishing agent;

[0020] Based on the total amount of the hydrocarbon surfactant, the fluorocarbon surfactant, the diethylene glycol monobutyl ether, the urea, the benzotriazole, the alcohol compound, and the water, the amount of the hydrocarbon surfactant is 10-30 wt%, the amount of the fluorocarbon surfactant is 3-6 wt%, the amount of the diethylene glycol monobutyl ether is 3-6 wt%, the amount of the urea is 5-10 wt%, the amount of the benzotriazole is 0.1-0.3 wt%, the amount of the alcohol compound is 25-45 wt%, and the water content is 25-35 wt%.

[0021] A third aspect of the present invention provides a fire extinguishing device containing the low-temperature resistant foam fire extinguishing agent described in the first aspect.

[0022] The low-temperature resistant foam fire extinguishing agent provided by this invention has a freezing point of -40℃, and its fire extinguishing performance meets the IA standard specified in GB 15308-2006. It is also environmentally friendly and can be stored stably for a long time. Detailed Implementation

[0023] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0024] As previously described, a first aspect of the present invention provides a low-temperature resistant foam fire extinguishing agent containing the following components:

[0025] Hydrocarbon surfactants, fluorocarbon surfactants, diethylene glycol monobutyl ether, urea, benzotriazole, alcohols and water;

[0026] The alcohol compounds are trifluoroethanol and ethylene glycol in a mass ratio of 1:1-6;

[0027] Based on the total weight of the low-temperature resistant foam extinguishing agent, the content of the hydrocarbon surfactant is 10-30 wt%, the content of the fluorocarbon surfactant is 3-6 wt%, the content of diethylene glycol monobutyl ether is 3-6 wt%, the content of urea is 5-10 wt%, the content of benzotriazole is 0.1-0.3 wt%, the content of alcohol compounds is 25-45 wt%, and the content of water is 25-35 wt%.

[0028] Preferably, the mass ratio of trifluoroethanol to ethylene glycol in the alcohol compound is 1:1-3. The inventors have discovered that, under this preferred embodiment, the low-temperature resistant foam extinguishing agent provided by the present invention has a lower freezing point.

[0029] Preferably, based on the total weight of the low-temperature resistant foam extinguishing agent, the content of the hydrocarbon surfactant is 15-25 wt%, the content of the fluorocarbon surfactant is 3-5 wt%, the content of the diethylene glycol monobutyl ether is 3-5 wt%, the content of the urea is 5-8 wt%, the content of the benzotriazole is 0.1-0.3 wt%, the content of the alcohol compound is 30-45 wt%, and the content of the water is 25-35 wt%.

[0030] Preferably, the hydrocarbon surfactant is selected from at least one of APG0810, APG0812, APG0814, and sodium lauryl sulfate.

[0031] Preferably, the fluorocarbon surfactant is a combination of Forafac1157 and Forafac3030.

[0032] More preferably, the mass ratio of Forafac1157 to Forafac3030 is 1:2-5. The inventors have found that, under this preferred embodiment, the low-temperature resistant foam extinguishing agent provided by the present invention has a better fire extinguishing effect.

[0033] As previously stated, a second aspect of the present invention provides a method for using the low-temperature resistant foam fire extinguishing agent described in the first aspect, the method comprising:

[0034] (1) Water, fluorocarbon surfactant, and hydrocarbon surfactant are mixed in a first contact to obtain intermediate material I; and

[0035] An alcohol compound and diethylene glycol monobutyl ether are mixed to obtain a mixture; the alcohol compound is trifluoroethanol and ethylene glycol in a mass ratio of 1:1-6.

[0036] (2) The urea, benzotriazole, intermediate material I and the mixture are subjected to a second contact mixing to obtain the low-temperature resistant foam fire extinguishing agent;

[0037] Based on the total amount of the hydrocarbon surfactant, the fluorocarbon surfactant, the diethylene glycol monobutyl ether, the urea, the benzotriazole, the alcohol compound, and the water, the amount of the hydrocarbon surfactant is 10-30 wt%, the amount of the fluorocarbon surfactant is 3-6 wt%, the amount of the diethylene glycol monobutyl ether is 3-6 wt%, the amount of the urea is 5-10 wt%, the amount of the benzotriazole is 0.1-0.3 wt%, the amount of the alcohol compound is 25-45 wt%, and the water content is 25-35 wt%.

[0038] Preferably, in step (1), the first contact mixing is carried out under stirring conditions, the conditions of which include: temperature of 40-60℃, stirring speed of 700-1000rpm, and time of 1-1.5h.

[0039] Preferably, in step (2), the second contact mixing is carried out under stirring conditions, the conditions of which include: temperature of 40-60℃, stirring speed of 700-1000rpm, and time of 1-1.5h.

[0040] As previously described, a third aspect of the present invention provides a fire extinguishing device containing the low-temperature resistant foam fire extinguishing agent described in the first aspect.

[0041] The present invention does not have any special requirements for the assembly process of the fire extinguishing device, and it can be assembled using methods known in the art. The present invention will not elaborate on these methods here, and those skilled in the art should not understand them as limitations on the present invention.

[0042] The present invention will be described in detail below through embodiments.

[0043] In the following examples, unless otherwise specified, all experimental reagents and raw materials involved are commercially available products, and all reagents are analytical grade products.

[0044] raw material

[0045] Hydrocarbon surfactant: APG0810, purchased from Shanghai Fakai Chemical Co., Ltd.;

[0046] Fluorocarbon surfactant I: Forafac 1157 and Forafac 3030 are mixed in a mass ratio of 1:3;

[0047] Fluorocarbon surfactant II: Forafac 1157 and Forafac 3030 are mixed in a mass ratio of 1:1;

[0048] In the following examples, Forafac1157 and Forafac3030 were purchased from Shanghai Yumu Chemical Co., Ltd.

[0049] Example 1

[0050] This embodiment illustrates that the low-temperature resistant foam fire extinguishing agent of the present invention is prepared according to the formula in Table 1 and the method described below.

[0051] The method for using the low-temperature resistant foam extinguishing agent includes the following steps:

[0052] (1) Water, fluorocarbon surfactant and hydrocarbon surfactant are mixed in the first contact under stirring (stirring speed is 800 rpm, temperature is 50℃, time is 1 h) to obtain intermediate material I;

[0053] (2) Trifluoroethanol, ethylene glycol and diethylene glycol monobutyl ether are mixed to obtain a mixture;

[0054] (3) The urea, benzotriazole, intermediate material I and the mixture are subjected to a second contact mixing under stirring (stirring speed of 800 rpm, temperature of 50°C, time of 1 h) to obtain the low-temperature resistant foam fire extinguishing agent.

[0055] Unless otherwise specified, the other embodiments follow the same procedure as Example 1, except that the formulation for preparing the low-temperature resistant foam extinguishing agent is different, as detailed in Table 1; the comparative examples follow the same procedure as Example 1, except that the formulation for preparing the low-temperature resistant foam extinguishing agent is different, as detailed in Table 2.

[0056] Table 1

[0057]

[0058]

[0059] Table 2

[0060]

[0061] Test case

[0062] The performance testing methods involved in the following examples are as follows:

[0063] 1. Surface tension shall be tested in accordance with GB 15308-2006 (standard or method);

[0064] 2. The freezing point shall be tested in accordance with GB 15308-2006 (standard or method);

[0065] 3. The 25% precipitation time and the anti-burning time were both tested according to GB 15308-2006 standard;

[0066] 4. Fire extinguishing test: The low-temperature resistant foam fire extinguishing agent prepared in the above examples and comparative examples was mixed with water at a mass ratio of 6:94 to prepare a mixture, and the fire extinguishing test was carried out in accordance with GB 15308-2006 standard.

[0067] The test results are shown in Table 3.

[0068] Table 3

[0069]

[0070] As can be seen from the results in Table 3, the low-temperature resistant foam fire extinguishing agent provided by the present invention can greatly reduce the freezing point, making the freezing point reach -40℃, and has excellent fire extinguishing performance.

[0071] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A low-temperature resistant foam fire extinguishing agent, characterized in that, This low-temperature resistant foam fire extinguishing agent contains the following components: Hydrocarbon surfactants, fluorocarbon surfactants, diethylene glycol monobutyl ether, urea, benzotriazole, alcohols and water; The alcohol compounds are trifluoroethanol and ethylene glycol in a mass ratio of 1:1-3; Based on the total weight of the low-temperature resistant foam fire extinguishing agent, the content of the hydrocarbon surfactant is 10-30 wt%, the content of the fluorocarbon surfactant is 3-6 wt%, the content of diethylene glycol monobutyl ether is 3-6 wt%, the content of urea is 5-10 wt%, the content of benzotriazole is 0.1-0.3 wt%, the content of alcohol compounds is 25-45 wt%, and the content of water is 25-35 wt%. The fluorocarbon surfactant is a combination of Forafac1157 and Forafac3030; the mass ratio of Forafac1157 to Forafac3030 is 1:

3.

2. The low-temperature resistant foam fire extinguishing agent according to claim 1, characterized in that, Based on the total weight of the low-temperature resistant foam extinguishing agent, the content of the hydrocarbon surfactant is 15-25 wt%, the content of the fluorocarbon surfactant is 3-5 wt%, the content of the diethylene glycol monobutyl ether is 3-5 wt%, the content of the urea is 5-8 wt%, the content of the benzotriazole is 0.1-0.3 wt%, the content of the alcohol compound is 30-45 wt%, and the content of the water is 25-35 wt%.

3. The low-temperature resistant foam fire extinguishing agent according to claim 1 or 2, characterized in that, The hydrocarbon surfactant is selected from at least one of APG0810, APG0812, APG0814, and sodium lauryl sulfate.

4. A method for preparing the low-temperature resistant foam fire extinguishing agent according to any one of claims 1-3, characterized in that, The method includes: (1) Water, fluorocarbon surfactant, and hydrocarbon surfactant are mixed in a first contact to obtain intermediate material I; and An alcohol compound and diethylene glycol monobutyl ether are mixed to obtain a mixture; the alcohol compound is trifluoroethanol and ethylene glycol in a mass ratio of 1:1-3. (2) The urea, benzotriazole, intermediate material I and the mixture are subjected to a second contact mixing to obtain the low-temperature resistant foam fire extinguishing agent; Based on the total amount of the hydrocarbon surfactant, the fluorocarbon surfactant, the diethylene glycol monobutyl ether, the urea, the benzotriazole, the alcohol compound, and the water, the amount of the hydrocarbon surfactant is 10-30 wt%, the amount of the fluorocarbon surfactant is 3-6 wt%, the amount of the diethylene glycol monobutyl ether is 3-6 wt%, the amount of the urea is 5-10 wt%, the amount of the benzotriazole is 0.1-0.3 wt%, the amount of the alcohol compound is 25-45 wt%, and the water content is 25-35 wt%.

5. The method according to claim 4, characterized in that, In step (1), the first contact mixing is carried out under stirring conditions, which include: a temperature of 40-60℃, a stirring speed of 700-1000rpm, and a time of 1-1.5h.

6. The method according to claim 4 or 5, characterized in that, In step (2), the second contact mixing is carried out under stirring conditions, which include: a temperature of 40-60°C, a stirring speed of 700-1000 rpm, and a time of 1-1.5 h.

7. A fire extinguishing device, characterized in that, The fire extinguishing device contains the low-temperature resistant foam fire extinguishing agent as described in any one of claims 1-3.

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