CN111437559A - Fast-spreading seawater-resistant high-expansion foam extinguishing agent and preparation and use methods thereof - Google Patents
Fast-spreading seawater-resistant high-expansion foam extinguishing agent and preparation and use methods thereof Download PDFInfo
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- CN111437559A CN111437559A CN202010227407.3A CN202010227407A CN111437559A CN 111437559 A CN111437559 A CN 111437559A CN 202010227407 A CN202010227407 A CN 202010227407A CN 111437559 A CN111437559 A CN 111437559A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0071—Foams
Abstract
The invention relates to a foam fire extinguishing agent which has the advantages of fast spreading, seawater resistance and high mixing and dissolving capacity with seawater, and the foam fire extinguishing agent consists of a component A and a component B, wherein the component A is a perfluoro (4-methyl-3, 6 dioxa-7-octene) sodium sulfonate surfactant, and methyl lauroyl sodium taurate; an anti-burn agent; an anti-freeze agent; dodecyl ether, water and a component B which is an aqueous solution of acrylate copolymer surfactant, and a preparation method and a use method of the foam extinguishing agent. Compared with the prior art, the foam extinguishing agent has the advantages of fewer components, lower cost, longer storage stability and higher foam spreading speed in use.
Description
Technical Field
The invention belongs to the technical field of fire-fighting materials, and particularly relates to a foam extinguishing agent which is fast in spreading and seawater-resistant and can be mixed with seawater in a high-fold manner, and a preparation method and a use method thereof.
Background
The water film-forming foam extinguishing agent is an environmentally-friendly extinguishing agent which is mainly developed internationally, and particularly, the development of the water film-forming foam extinguishing agent which can be mixed with seawater at a high ratio is a hotspot of current research aiming at fires of offshore ships, offshore drilling platforms and the like. The water film-forming foam extinguishing agent is an extinguishing agent based on an efficient foaming agent. The fire extinguishing agents for extinguishing oil-type fires in the world currently mainly comprise alkyl halides (such as 1211) and fluoroprotein foam extinguishing agents, aqueous film-forming foam extinguishing agents and the like.
For example, the applied AFFF3 and AFFF6 type aqueous film-forming foam extinguishing agents are mainly fresh water type products, and most of the products have the defects of poor cold resistance and salt resistance and the like. Chinese patent CN103691091A for overcoming the defect discloses a seawater-resistant high-expansion foam extinguishing agent, which comprises a composite hydrocarbon surfactant, an anti-freezing agent, higher alcohol, ether, a foam stabilizer and the like. Chinese patent CN102284171A also discloses a preparation method of the cold-resistant seawater-resistant aqueous film-forming foam fire extinguishing agent, which contains the components of a composite anti-burning agent, sodium benzoate, urea, xanthan gum, a stabilizer and the like.
However, the techniques disclosed in the above prior art often have the following drawbacks: 1) it is necessary to add such inorganic salts as foam stabilizers, which cause problems of precipitation during storage, short storage period, etc., 2) the components are very complicated and costly, and 3) the speed of foam spreading is relatively slow and the amount of spreading is low.
Therefore, the development of a foam extinguishing agent product which is more economical, environment-friendly, longer in storage period and good in spreading effect is still needed.
Disclosure of Invention
In order to solve the above problems of the prior art, it is an object of the present invention to provide a fire suppressant foam which spreads quickly, is resistant to seawater, and is highly miscible with seawater, has fewer components, is less expensive, has a longer storage stability, and spreads quickly in use, relative to the prior art.
The foam fire-extinguishing agent according to the invention is composed of a component A and a component B,
wherein the component A consists of the following components:
60 to 75 parts by weight of a sodium perfluoro (4-methyl-3, 6 dioxa-7-octene) sulfonate surfactant, 18 to 23 parts by weight of sodium methyl lauroyl taurate; 10 to 17 parts by weight of an anti-burn agent; 6 to 8 parts by weight of an antifreeze agent; 10 to 16 parts by weight of dodecyl ether, 20 to 30 parts by weight of water;
the component B is 60 to 70 weight percent of acrylate copolymer surfactant;
the volume ratio of the component A to the component B is 8:2 to 6: 4;
preferably, the volume ratio of component a to component B is 6.5: 3.5;
preferably, the anti-burning agent in the component A is polyether polyol F3128;
the antifreeze in the component A is a mixture of ethylene glycol and propylene glycol, and the volume ratio of the ethylene glycol to the propylene glycol is 4: 6.
The acrylate copolymer surfactant in the component B is a mixture of methoxy polyethylene glycol acrylate and benzoyl peroxide, and the weight ratio of the methoxy polyethylene glycol acrylate to the benzoyl peroxide is 65-76: 1.
The component B accounts for 65 wt% in percentage by mass.
Further preferably, wherein component a consists of:
68 parts by weight of a sodium perfluoro (4-methyl-3, 6 dioxa-7-octene) sulfonate surfactant, 18 to 23 parts by weight of sodium methyl lauroyl taurate; 15 parts by weight of an anti-burn agent; 6 parts by weight of an antifreeze agent; 13 parts by weight of dodecyl ether, 24 parts by weight of water;
the component B is acrylate copolymer surfactant with the mass percent of 65 wt%.
The using method comprises the following steps: the component A and the component B are independently stored before use, are mixed according to the proportion when used, and are mixed with seawater according to the volume ratio of 1:99 to 3:97 for fire extinguishing.
According to another aspect of the present invention, it is another object of the present invention to provide a method for preparing the foam fire extinguishing agent, the method comprising the steps of:
heating the mixed reaction kettle to 55-60 ℃, adding water according to the proportion, and then adding a perfluoro (4-methyl-3, 6 dioxa-7-octene) sodium sulfonate surfactant and sodium methyl lauroyl taurate; stirring for 30min, and then sequentially adding the anti-burning agents; an anti-freeze agent; dodecyl ether, and stirring for 30min to obtain component A.
And adding the acrylate copolymer surfactant into water, and uniformly stirring to obtain the component B.
According to another aspect of the invention, another object of the invention is to provide a method of using the foam extinguishing agent, the method of using comprising the steps of:
the component A and the component B which form the foam extinguishing agent are respectively and independently stored before use and are mixed according to the proportion when in use. For example, two storage chambers are arranged in a storage tank for storing the component A and the component B respectively, a spiral mixer is arranged at the opening of the storage tank and is connected with the storage chambers of the component A and the component B respectively, when in use, the component A and the component B are respectively extracted from the storage chambers of the component A and the component B and are mixed in the spiral mixer, and then the mixture is mixed with seawater according to the volume ratio of 1:99 to 3:97 for fire extinguishing.
Preferably, the volume ratio of the storage chambers for component a and component B is set to 8:2 to 7:3, more preferably 7.5: 2.5.
Advantageous effects
The foam extinguishing agent according to the invention has the following advantages:
compared with the existing foam extinguishing agent, the foam extinguishing agent has longer storage stability, fewer component types, better foaming effect and more environmental protection. In addition, the foam extinguishing agent has lower manufacturing cost and simpler preparation process, and is more convenient for large-scale industrial production.
Detailed Description
Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms used in the specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present invention on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Accordingly, the description herein is of preferred examples for the purpose of illustration only and is not intended to limit the scope of the present invention, so it will be understood that other equivalent implementations and modifications may be made without departing from the spirit and scope of the present invention.
The acrylate copolymer surfactants were first employed as the foam-extinguishing-agent components in the foam-extinguishing agents according to the invention which have a fast spreading, are resistant to seawater and are highly miscible with seawater. The surface strength of the contact surface of the foam material and seawater can be improved by adding the acrylate copolymer surfactant, the foam material has a better foaming effect, is high in spreading speed, large in spreading amount and excellent in stability and burning resistance, and can achieve the effect of quickly extinguishing fire.
The foam extinguishants according to the invention are therefore composed of two parts, component A and component B, which are stored separately and mixed during use.
The component A in the foam extinguishing agent consists of the following components:
60 to 75 parts by weight of a sodium perfluoro (4-methyl-3, 6 dioxa-7-octene) sulfonate surfactant, 18 to 23 parts by weight of sodium methyl lauroyl taurate; 10 to 17 parts by weight of an anti-burn agent; 6 to 8 parts by weight of an antifreeze agent; 10 to 16 parts by weight of dodecyl ether, 20 to 30 parts by weight of water;
the component B is an aqueous solution of acrylate copolymer surfactant with the mass percent of 60 wt% to 70 wt%.
The mass percentage of the aqueous solution as the component B should be controlled within 60 wt% to 70 wt%, if more than 70 wt%, the viscosity is too high to be used easily; whereas, if it is less than 60% by weight, the foaming effect is not satisfactory. Preferably, component B is a 65 wt% aqueous solution of a silicon-containing surfactant.
In addition, the volume ratio of the component A to the component B is 8:2 to 6:4, and when the volume ratio of the component A to the component B is more than 8:2, namely the component A is excessive, the component A is difficult to be mixed with seawater in high times, and the foaming effect is poor; when the ratio of the component A to the component B is less than 6:4, the foaming effect is also poor due to the fact that the component A is insufficient. More preferably, the volume ratio of component a to component B is 6.5: 3.5.
The use method of the foam extinguishing agent comprises the following steps:
the component A and the component B which form the foam extinguishing agent are respectively and independently stored before use and are mixed according to the proportion when in use. For example, two storage chambers are arranged in a storage tank for storing the component A and the component B respectively, a spiral mixer is arranged at the opening of the storage tank and is connected with the storage chambers of the component A and the component B respectively, when in use, the component A and the component B are respectively extracted from the storage chambers of the component A and the component B and are mixed in the spiral mixer, and then the mixture is mixed with seawater according to the volume ratio of 1:99 to 3:97 for fire extinguishing.
Preferably, the volume ratio of the storage chambers for component a and component B is set to 8:2 to 7:3, more preferably 7.5: 2.5.
Preferably, the component A and the component B simultaneously reach the spiral mixer by installing a flow valve or controlling the cross-sectional area of a pipeline before the storage chambers of the component A and the component B of the storage tank and the spiral mixer, and the volume ratio of the component A to the component B is 8:2 to 7: 3.
The following examples are given by way of illustration of embodiments of the invention and are not to be construed as limiting the invention, and it will be understood by those skilled in the art that modifications may be made without departing from the spirit and scope of the invention. Unless otherwise specified, reagents and equipment used in the following examples are commercially available products.
Example 1
The mixing reaction kettle is heated to 55-60 ℃, 20kg of water, 68kg of sodium perfluoro (4-methyl-3, 6 dioxa-7-octene) sulfonate surfactant, 21kg of sodium methyl lauroyl taurate are added thereto, stirred for 30min, then 15kg of polyether polyol F3128, 7kg of a mixture of ethylene glycol and propylene glycol (the volume ratio of ethylene glycol to propylene glycol is 4:6) and 14kg of dodecyl ether are added in sequence, and stirring is continued for 30min to obtain component A.
Adding an acrylate copolymer surfactant (a mixture of methoxy polyethylene glycol acrylate and benzoyl peroxide, wherein the weight ratio of the methoxy polyethylene glycol acrylate to the benzoyl peroxide is 67:1) into water, and uniformly stirring to form a solution with the mass percentage of 65 wt%, thereby obtaining a component B.
The volume ratio of component a to component B was 6.5:3.5 and component a and component B were stored separately.
Example 2
Component A and component B were prepared in the same manner as in example 1, except that the volume ratio of component A to component B was 8: 2.
Example 3
Component A and component B were prepared in the same manner as in example 1, except that the volume ratio of component A to component B was 6: 4.
Comparative example 1
Component A and component B were prepared in the same manner as in example 1, except that the volume ratio of component A to component B was 9: 1.
Comparative example 2
Component A and component B were prepared in the same manner as in example 1, except that the volume ratio of component A to component B was 5: 5.
Comparative example 3
Component A and component B were prepared in the same manner as in example 1, except that component B was 75 wt% of an acrylate copolymer surfactant.
Comparative example 4
Component A and component B were prepared in the same manner as in example 1, except that component B was 40 wt% of an acrylate copolymer surfactant.
Comparative example 5
Component B is not added, but only component A is used as the foam extinguishing agent.
Comparative example 6
Component A and component B were prepared in the same manner as in example 1, and then mixed to form a mixture, and left at 60 ℃ for 7 days (accelerated aging).
Test example 1
The products of examples 1 to 3 and comparative examples 1 to 5 were subjected to the main performance tests according to national standard GB15308-2006 "foam fire-extinguishing agent", the results of which are given in Table 1 below, wherein component A and component B were mixed in a volume ratio of 6.5:3.5 before the test.
TABLE 1
Table 2 shows the comparison of the spreading speed and the spreading amount in each example and comparative example
| Item | Mass fraction (%) | Spreading speed (cm)2/s) | Amount of spread (mg/cm)3) |
| Example 1 | 6 | 13.691 | 2.97 |
| Example 2 | 6 | 13.784 | 3.03 |
| Example 3 | 6 | 14.053 | 3.11 |
| Comparative example 1 | 6 | 11.369 | 2.55 |
| Comparative example 2 | 6 | 10.290 | 2.21 |
| Comparative example 3 | 6 | 11.165 | 1.65 |
| Comparative example 4 | 6 | 10.697 | 1.03 |
| Comparative example 5 | 6 | 10.398 | 0.94 |
| Comparative example 6 | 6 | 12.698 | 1.01 |
Test example 2: storage stability test
The storage stability of the foam extinguishants was evaluated by subjecting the products of examples 1 to 3 and comparative examples 1 to 5 to a storage stability test according to national standard GB15308-2006 of foam extinguishants and allowing the foam extinguishants to stand at 60 ℃ for 7 days (accelerated aging). In the national standard GB15308-2006, the standard requires that the volume of the precipitate before aging is less than or equal to 0.25%, the precipitate can pass through a 180-micrometer sieve, the volume of the precipitate after aging is less than or equal to 1.00, and the precipitate can pass through the 180-micrometer sieve. Examples 1 to 3 and comparative examples 1 to 5 had no precipitate. Whereas the product of comparative example 6 had a sediment volume of 1.73% before aging and a small amount of sediment could not pass through the 180 μm sieve, the sediment volume after aging was 2.47% and a part of the sediment could not pass through the 180 μm sieve.
Test example 3: test for freezing resistance
The freezing points of the product of component A, component B and comparative example 6 of example 1 were measured to be-45.7 deg.C, -50.3 deg.C and-48.2 deg.C, respectively. The components a and B of the product of example 1 and the product of comparative example 6 were kept at-57 ℃ (about 10 ℃ below freezing) for 24 hours, after cold freezing, the samples were removed and left at 20 ℃ ± 5 ℃ for 24 hours to 96 hours, which was repeated three more times and subjected to four freeze thaw cycles. And observing whether the sample has delamination or not and is heterogeneous.
The experimental results are as follows: after the product of the example 1 is subjected to four freezing and thawing cycles, no sample delamination or precipitation phenomenon is found; the product of comparative example 6 was subject to delamination or precipitation upon the second freeze-thaw cycle, and was exacerbated upon the third and fourth freeze-thaw cycles.
Claims (8)
1. A foam fire-extinguishing agent which spreads quickly, is resistant to seawater and is highly miscible with seawater, consisting of a component A and a component B,
wherein the component A consists of the following components:
60 to 75 parts by weight of a sodium perfluoro (4-methyl-3, 6 dioxa-7-octene) sulfonate surfactant, 18 to 23 parts by weight of sodium methyl lauroyl taurate; 10 to 17 parts by weight of an anti-burn agent; 6 to 8 parts by weight of an antifreeze agent; 10 to 16 parts by weight of dodecyl ether, 20 to 30 parts by weight of water;
the component B is 60 to 70 weight percent of acrylate copolymer surfactant;
the volume ratio of the component A to the component B is 8:2 to 6: 4.
2. The foam fire suppressant of claim 1 wherein the volume ratio of component a to component B is 6.5: 3.5.
3. The foam fire extinguishing agent according to claim 1, wherein the fire retardant in component a is polyether polyol F3128.
4. The foam fire extinguishing agent according to claim 1, wherein the antifreeze agent in component A is a mixture of ethylene glycol and propylene glycol in a volume ratio of 4: 6.
5. The fire foam of claim 1 wherein the acrylate copolymer surfactant of component B is a mixture of methoxypolyethylene glycol acrylate and benzoyl peroxide in a weight ratio of 65-76: 1.
6. The foam fire extinguishing agent according to claim 1, wherein the component B is 65 wt% by mass.
7. The foam fire extinguishing agent according to claim 1,
wherein the component A consists of the following components:
68 parts by weight of a sodium perfluoro (4-methyl-3, 6 dioxa-7-octene) sulfonate surfactant, 18 to 23 parts by weight of sodium methyl lauroyl taurate; 15 parts by weight of an anti-burn agent; 6 parts by weight of an antifreeze agent; 13 parts by weight of dodecyl ether, 24 parts by weight of water;
the component B is acrylate copolymer surfactant with the mass percent of 65 wt%.
8. Use of the foam fire suppressant according to any of claims 1 to 8, comprising the steps of: the component A and the component B are independently stored before use, are mixed according to the proportion when used, and are mixed with seawater according to the volume ratio of 1:99 to 3:97 for fire extinguishing.
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| CN108853862A (en) * | 2018-06-20 | 2018-11-23 | 浙江巨化技术中心有限公司 | A kind of environment-friendly type aqueous film-forming foam extinguishing agent and preparation method thereof |
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2020
- 2020-03-27 CN CN202010227407.3A patent/CN111437559B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012094695A1 (en) * | 2011-01-13 | 2012-07-19 | Biocentral Laboratories Limited | Fire fighting water additive |
| CN203469269U (en) * | 2013-09-26 | 2014-03-12 | 西安新竹防灾救生设备有限公司 | Liquid-driven mixed fire extinguishing device |
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