CN111298357A - Colloid foam extinguishing agent suitable for high-position fire source and hidden fire source of coal mine - Google Patents
Colloid foam extinguishing agent suitable for high-position fire source and hidden fire source of coal mine Download PDFInfo
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- CN111298357A CN111298357A CN202010278107.8A CN202010278107A CN111298357A CN 111298357 A CN111298357 A CN 111298357A CN 202010278107 A CN202010278107 A CN 202010278107A CN 111298357 A CN111298357 A CN 111298357A
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- A—HUMAN NECESSITIES
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- 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
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Abstract
The invention provides a colloid foam extinguishing agent suitable for high-position fire sources and hidden fire sources of coal mines, belonging to the technical field of extinguishing agents. The colloid foam extinguishing agent suitable for the high-position fire source and the concealed fire source of the coal mine comprises the following components in percentage by mass: 1-4% of refractory soil, 20-30% of foaming agent, 3-7% of cooked rubber powder, 1-10% of fly ash and the balance of water. The foam stabilizing time of the colloidal foam extinguishing agent provided by the invention reaches more than 100h, and the generation of a 'down-flow' phenomenon and a slurry collapse deterioration working surface phenomenon can be effectively avoided; the colloid foam fire extinguishing agent provided by the invention can be accumulated to a crack in a high-altitude space, has a wide coverage area, can effectively extinguish a fire source at a high position and in a crack concealed place, is suitable for treating the fire source under a complex condition of a coal mine, can absorb the heat of a coal body after the foam meets a high-temperature coal body in application, and can form a layer of water colloid after the aggregate is adsorbed in the coal body or the crack to play roles in absorbing heat, cooling and isolating oxygen.
Description
Technical Field
The invention relates to the technical field of fire extinguishing agents, in particular to a colloid foam fire extinguishing agent suitable for high-level fire sources and hidden fire sources of coal mines.
Background
The treatment of high-level fire sources and hidden fire sources in a goaf under a coal mine is always a difficult problem in the industry. At present, the conventional fire extinguishing method is to inject yellow mud or use a colloid fire extinguishing agent and a foam fire extinguishing agent, but the yellow mud and the colloid fire extinguishing agent are supported by water and are easy to precipitate, the underground goaf environment is complex, the fluctuation and the unevenness of a bottom plate are difficult to control hidden fire sources, and in addition, the existence of coal caving and gangue is easy to form gully to cause slurry leakage, the grouting amount is difficult to be accumulated to a certain height, and the inhibition effect on high-level fire sources is also poor; the conventional foam fire extinguishing agent has fluidity and can meet the complex environment of a coal mine underground, but the conventional foam fire extinguishing agent has quick defoaming, the defoaming time is generally 4-10 hours, and water after defoaming can instantly flow away to a low-lying place and cannot extinguish a high-level fire source in a short time. Therefore, at present, no fire extinguishing agent capable of effectively treating high-level fire sources and concealed fire sources of coal mines is available.
Disclosure of Invention
The invention aims to provide a colloid foam fire extinguishing agent suitable for high-level fire sources and hidden fire sources of coal mines.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a colloid foam extinguishing agent suitable for high-position fire sources and hidden fire sources of coal mines, which comprises the following components in percentage by mass: 1-4% of refractory soil, 20-30% of foaming agent, 3-7% of cooked rubber powder, 1-10% of fly ash and the balance of water.
Preferably, the composition comprises the following components in percentage by mass: 1-2% of refractory soil, 25-30% of foaming agent, 1.5-5% of cooked rubber powder, 5-9% of fly ash and the balance of water.
Preferably, the composition comprises the following components in percentage by mass: 2% of refractory soil, 25% of foaming agent, 5% of cooked rubber powder, 5% of fly ash and the balance of water.
Preferably, the composition comprises the following components in percentage by mass: 1.5% of refractory soil, 27% of foaming agent, 3% of cooked rubber powder, 7% of fly ash and the balance of water.
Preferably, the composition comprises the following components in percentage by mass: 1% of refractory soil, 30% of foaming agent, 3.5% of cooked rubber powder, 9% of fly ash and the balance of water.
Preferably, the foaming agent is a w-101 compound type foaming agent.
Preferably, the particle size of the fly ash is 120-300 meshes.
Preferably, the particle size of the refractory soil is 120-300 meshes.
The colloid foam extinguishing agent suitable for the high-position fire source and the concealed fire source of the coal mine comprises the following components in percentage by mass: 1-4% of refractory soil, 20-30% of foaming agent, 3-7% of cooked rubber powder, 1-10% of fly ash and the balance of water. The fire-fighting colloid foam extinguishing agent is prepared by adding three inorganic materials, namely refractory soil, cooked rubber powder and fly ash, into a foam extinguishing agent to form a colloid foam extinguishing agent, wherein the cooked rubber powder has a water retention effect, the cooked rubber powder has certain viscosity after absorbing water, after the colloid foam extinguishing agent foams, tiny foams can be connected together to form a net shape and can be stacked together to form a large net-shaped foam group, the foam structure contains a colloid net structure formed by a large amount of colloid particles and aggregates, and after defoaming, colloid containing a large amount of water is remained on a coal body to form a layer of water colloid, so that oxygen supply and cooling can be blocked, the coal body is prevented from spontaneous combustion, and the fire is more thoroughly extinguished and is not re-combusted; in addition, the refractory soil has the characteristic of high temperature resistance, has the functions of absorbing water and increasing viscosity, and is beneficial to improving the foam stabilizing time; the fly ash has the function of absorbing water and can increase the strength of foam, thereby improving the foam stabilizing time. The three inorganic materials can effectively lock the moisture in the foam after the foaming of the colloidal foam extinguishing agent under the combined action, prolong the foam stabilizing time which can reach more than 100h, and avoid the phenomena of 'down-flow' and grout collapse deterioration on the working surface; the colloid foam fire extinguishing agent provided by the invention can be accumulated to a crack in a high-altitude space, the coverage area is wide, a fire source at a high-altitude and crack-hidden place can be effectively extinguished, the foam can absorb the heat of a coal body after encountering the high-temperature coal body, aggregates (fly ash and refractory soil) are adsorbed in the coal body or the crack to form a layer of water colloid, and the functions of absorbing heat, reducing temperature and isolating oxygen are achieved. In addition, the colloid foam fire extinguishing agent provided by the invention can be foamed by using the existing grouting system or the original foam injection equipment of a coal mine, is simple to operate and can realize quick fire extinguishing.
Drawings
FIG. 1 is a diagram showing the interior of the foam after the colloidal foam fire extinguishing agent obtained in example 1 is foamed;
FIG. 2 is a physical diagram of charcoal after fire extinguishment by the colloidal foam fire extinguishing agents of examples 1 to 2 and the foam fire extinguishing agent of comparative example 1;
FIG. 3 is a pictorial representation of the container temperature after extinguishing with the colloidal foam fire extinguishing agent of example 1 and the foam fire extinguishing agent of comparative example 1;
FIG. 4 is a diagram showing a case where the colloidal foam fire extinguishing agents of examples 1 to 3 and the foam fire extinguishing agent of comparative example 1 are left for 2 hours after being foamed;
FIG. 5 is a real image of the experimental and control briquettes before and after high-temperature baking.
Detailed Description
The invention provides a colloid foam extinguishing agent suitable for high-position fire sources and hidden fire sources of coal mines, which comprises the following components in percentage by mass: 1-4% of refractory soil, 20-30% of foaming agent, 3-7% of cooked rubber powder, 1-10% of fly ash and the balance of water.
In the invention, the colloid foam fire extinguishing agent comprises 1-4% of refractory soil, preferably 1-2%, and particularly preferably 1%, 1.5% or 2% by mass. In the invention, the refractory soil has high temperature resistance, does not harden after high temperature dehydration, has a water absorption effect, and can increase viscosity and improve foam stabilizing time. In addition, too much refractory earth can affect the generation of foam, and too little can affect the foam stabilizing time, and the dosage does not affect the generation of foam, and the fire extinguishing agent has longer foam stabilizing time.
In the invention, the colloid foam fire extinguishing agent comprises 20-30% of foaming agent, preferably 25-30%, and particularly preferably 25%, 27% or 30% by mass. The foaming agent affects the foaming ratio of the foam extinguishing agent, and a person skilled in the art can select a proper foaming agent according to the required foaming ratio. In the embodiment of the invention, the foaming agent is preferably a w-101 compound type foaming agent (also called as a w101 foaming agent), and the foaming ratio of the colloid foam extinguishing agent obtained by using the foaming agent is 20-50 times, preferably 22-35 times.
In the invention, the colloid foam fire extinguishing agent comprises 3-7% by mass of chamotte rubber powder, preferably 3-5% by mass of chamotte rubber powder, and particularly preferably 3%, 3.5% or 5% by mass of chamotte rubber powder. In the invention, the cooked rubber powder has the functions of water retention and bonding, has certain viscosity after absorbing water, can connect tiny foams together to form a net shape after the colloid foam extinguishing agent foams, can be stacked together to form a large net-shaped foam group, contains a large amount of colloid net-shaped structures formed by colloid particles and aggregates in the foam structures, and remains the colloid containing a large amount of moisture on the coal body after defoaming to form a layer of moisture colloid, can block the supply of oxygen and reduce the temperature, prevents the coal body from spontaneous combustion, and extinguishes the fire more thoroughly without re-combustion; in addition, the consumption of the cooked rubber powder is moderate, so that the adsorbability of the foam to the coal body and the foam stabilizing time of the foam after foaming can be ensured, and the foaming times are not influenced.
In the invention, the colloid foam fire extinguishing agent comprises 1-10% of fly ash, preferably 5-9%, and particularly preferably 5%, 7% or 9% by mass; the granularity of the fly ash is preferably 120-300 meshes. The inventor finds that the fly ash can absorb water through experiments, and can increase the strength of the foam so as to enable the foam to be more stable; in addition, excessive fly ash can influence the generation of foam, and the foam stabilizing time is influenced too little, and the dosage is proper, and the fly ash is matched with other components, so that the foam generation and the foam stabilizing time are not influenced.
In the invention, the particle sizes of the refractory soil and the fly ash have little or even negligible influence on the performance of the colloidal foam extinguishing agent, and the conventional refractory soil and the fly ash are both in powder form and can be uniformly dispersed in the colloidal foam extinguishing agent. In the embodiment of the invention, the granularity of the refractory soil is preferably 120-300 meshes, and more preferably 150 meshes; the particle size of the fly ash is preferably 120-300 meshes, and more preferably 300 meshes.
In the invention, the colloid foam extinguishing agent preferably comprises the following components in percentage by mass: 1-2% of refractory soil, 25-30% of foaming agent, 3-5% of cooked rubber powder, 5-9% of fly ash and the balance of water; the composition can also preferably comprise the following components in percentage by mass: 2% of refractory soil, 25% of foaming agent, 5% of cooked rubber powder, 5% of fly ash and the balance of water; or preferably comprises the following components in percentage by mass: 1.5% of refractory soil, 27% of foaming agent, 3% of cooked rubber powder, 7% of fly ash and the balance of water; or preferably comprises the following components in percentage by mass: 1% of refractory soil, 30% of foaming agent, 3.5% of cooked rubber powder, 9% of fly ash and the balance of water.
The specific sources of the raw materials are not particularly limited, and the raw materials can be commercially available products, wherein in the embodiment of the invention, the cooked rubber powder is purchased from Shanghai Haofeng decorating material company, refractory soil is purchased from Zibo Yingzhou refractory material factory, the foaming agent is purchased from Jiangsu Suolong fire-fighting science and technology company, and the coal ash is purchased from a power plant.
The colloidal foam extinguishing agent suitable for the high-level fire source and the concealed fire source of the coal mine is preferably prepared by a method of mixing the components.
The application method of the colloid foam fire extinguishing agent suitable for the high-position fire source and the hidden fire source of the coal mine is not specially limited, and the colloid foam fire extinguishing agent can be applied by adopting the conventional application method of the foam fire extinguishing agent, such as the foaming by adopting the existing grouting system or the original foam injection equipment of the coal mine. The colloid foam fire extinguishing agent provided by the invention is suitable for extinguishing high-level fire sources and hidden fire sources of coal mines, but not only can be used for extinguishing the high-level fire sources and hidden fire sources of the coal mines, but also aims to show that the colloid foam fire extinguishing agent has better effect in the aspect of extinguishing the high-level fire sources and hidden fire sources of the coal mines compared with the conventional foam fire extinguishing agent, and can also replace the conventional foam fire extinguishing agent for extinguishing the conventional fire sources.
The colloidal foam fire extinguishing agent suitable for coal mine high-level fire sources and concealed fire sources provided by the invention is described in detail below by referring to the examples, but the colloidal foam fire extinguishing agent is not to be construed as limiting the protection scope of the invention.
Example 1
The following components are mixed according to mass percentage to obtain the colloid foam extinguishing agent suitable for high-level fire sources and hidden fire sources of coal mines:
2% of refractory soil (the granularity is 150 meshes), 25% of w-101 compound type foaming agent, 5% of cooked rubber powder, 5% of fly ash (the granularity is 200 meshes), and the balance of water.
The colloidal foam fire extinguishing agent obtained in this example was put into a container and shaken for foaming, and then the structure of the colloidal crystal inside the container was collected, as shown in fig. 1, as can be seen from fig. 1, the colloidal foam fire extinguishing agent obtained in this example was foamed to form a reticulated foam group.
Example 2
The following components are mixed according to mass percentage to obtain the colloid foam extinguishing agent suitable for high-level fire sources and hidden fire sources of coal mines:
1.5% of refractory soil (the granularity is 150 meshes), 27% of w-101 compound type foaming agent, 3% of cooked rubber powder, 7% of fly ash (the granularity is 200 meshes), and the balance of water.
Example 3
The following components are mixed according to mass percentage to obtain the colloid foam extinguishing agent suitable for high-level fire sources and hidden fire sources of coal mines:
1% of refractory soil (granularity is 150 meshes), 30% of w-101 compound type foaming agent, 3.5% of cooked rubber powder, 9% of fly ash (granularity is 200 meshes), and the balance of water.
Comparative example 1
A foam fire-extinguishing agent of type 3% (Z-10 ℃) manufactured by Jiangsu Suolong fire-fighting science and technology Limited is used as a comparative example 1.
The performance parameters of the colloidal foam extinguishing agents obtained in examples 1 to 3 and the foam extinguishing agent obtained in comparative example 1 were measured, and are shown in table 1. Wherein the foam stabilizing time is 25% of the liquid separating time; in the test of defoaming time, the percentage of foam volume reduction after the foam is placed for a certain time is tested; the quality guarantee period test method comprises the following steps: the foam extinguishing agent is placed for 1 year in a circulating mode under the following conditions, then the foaming times, the foam stabilizing time and the defoaming time are tested, and the three performances are not changed greatly, so that the quality guarantee period can reach more than 1 year: the product is placed at room temperature (10-20 ℃ without additional heating or cooling) for 1 month, is refrigerated at 0-8 ℃ for 1 month and is placed at an outdoor sunlight-irradiatable place (25-35 ℃ C.) for 1 month. From table 1, it can be seen that the foaming times of the colloidal foam extinguishing agents obtained in examples 1 to 3 are equal to or even higher than those of comparative example 1, the foam stabilizing time is much longer than that of comparative example 1, and the defoaming process is slower, which is beneficial to extinguishing high-level fire sources and concealed fire sources.
TABLE 1 Performance parameters of the colloidal foam extinguishants obtained in examples 1 to 3 and the foam extinguishants obtained in comparative example 1
Other performance tests:
(1) the colloidal foam fire extinguishing agents of examples 1 to 3 and the foam fire extinguishing agent of comparative example 1 were tested for their ability to form a layer of moisture colloid after defoaming by the following method:
igniting 200g of charcoal, stirring and foaming 100g of foam extinguishing agent, pouring the foam extinguishing agent onto burning charcoal, and observing whether a layer of colloidal substance exists on the surface of the charcoal after defoaming. The results showed that the colloidal foam fire extinguishing agents of examples 1 to 3 formed a gel on the surface of charcoal after fire extinguishing. FIG. 2 is a schematic diagram showing physical images of the colloidal fire extinguishing agents of examples 1-2 and the fire extinguishing agent of comparative example 1 after fire extinguishment, wherein a is a physical image of charcoal after fire extinguishment using the colloidal fire extinguishing agent obtained in example 1, b is a physical image of charcoal after fire extinguishment using the colloidal fire extinguishing agent obtained in example 2, and c is a physical image of charcoal after fire extinguishment using the fire extinguishing agent obtained in comparative example 1. As can be seen from FIG. 2, when the colloidal foam fire extinguishing agents obtained in examples 1 and 2 were used to extinguish fire, colloidal substances (i.e., white spots in a and b, formed by the aggregation of colloidal substances) were formed on the surface of charcoal and covered with the charcoal.
(2) The fire extinguishing performance of the fire extinguishing agent is tested by adopting the following method:
200g of charcoal was put into a beaker and ignited, the container showed a temperature of 400 ℃, 100g of the foam extinguishing agent was poured into the container after foaming by stirring, and the temperature of the container was recorded.
As shown in FIG. 3, the container temperatures after extinguishing the fire (without open fire) are shown for the colloidal fire extinguishing agent of example 1 and the foam fire extinguishing agent of comparative example 1, where a is the container temperature after extinguishing the fire using the colloidal foam fire extinguishing agent of example 1 and b is the container temperature after extinguishing the fire using the foam fire extinguishing agent of comparative example 1. Tests show that the container temperature after the fire is extinguished by using the colloidal foam extinguishing agent of examples 1-3 is 127.3 ℃, 123.6 ℃ and 108.6 ℃ in sequence, and the container temperature after the fire is extinguished by using the foam extinguishing agent of comparative example 1 is 178.6 ℃, which shows that the colloidal foam extinguishing agent provided by the invention has higher cooling speed and better fire extinguishing performance.
(3) Case of water release after defoaming:
100g of the colloidal foam fire extinguishing agent obtained in examples 1 to 3 and the foam fire extinguishing agent of comparative example 1 were put into four mineral water bottles of the same specification, respectively, shaken for 30 times to foam, and then left for 2 hours. The amount of water released from the two foam extinguishers was observed as shown in FIG. 4, wherein a to c were the colloidal foam extinguishers of examples 1, 2 and 3, and d was the foam extinguisher of comparative example 1. As can be seen from fig. 4, the height (1.4cm) of the water layer at the bottom of the mineral water bottle of comparative example 1 is significantly higher than that of the mineral water bottles of examples 1 to 3, and the heights of the water layers at the bottoms of the mineral water bottles of examples 1 to 3 are 0.6cm, 0.5cm and 0.6cm in this order, which indirectly illustrates that the colloidal foam fire extinguishing agent provided by the present invention is not likely to release water, and thus is not likely to cause the "down-flow" phenomenon and the mud break deterioration working surface phenomenon.
(4) Mixing the colloidal foam extinguishing agent in the embodiment 1 with refractory soil according to a certain proportion to obtain a mud mass which is marked as an experimental mud mass; preparing a foam extinguishing agent according to the material ratio of the example 1, wherein the difference is that no chamotte rubber powder is added, marking the obtained foam extinguishing agent as a reference foam extinguishing agent, and mixing the reference foam extinguishing agent and the refractory soil according to the same proportion to obtain a mud mass, and marking the mud mass as a reference mud mass; the experimental and control briquettes were baked at high temperature for 20min using a gas burner flame, and the states of the two briquettes were observed, as shown in fig. 5, wherein a is the state before baking and b is the state after baking, wherein the briquette on the upper left side of the burner in a and b is the control briquette, and the briquette on the right side is tested. As can be seen from FIG. 5, the experimental mud pie has better water retention, and can maintain higher humidity when baked for 20min, while only a small part of the top of the control mud pie can maintain certain humidity, which is mainly because the water retention of the mud pie is effectively improved by the addition of the cooked rubber powder, and indirectly shows that the water retention of the foam extinguishing agent can be improved by the cooked rubber powder.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The colloid foam extinguishing agent is suitable for high-position fire sources and concealed fire sources of coal mines, and is characterized by comprising the following components in percentage by mass: 1-4% of refractory soil, 20-30% of foaming agent, 3-7% of cooked rubber powder, 1-10% of fly ash and the balance of water.
2. The colloidal foam fire extinguishing agent according to claim 1, which comprises the following components in percentage by mass: 1-2% of refractory soil, 25-30% of foaming agent, 3-5% of cooked rubber powder, 5-9% of fly ash and the balance of water.
3. The colloidal foam fire extinguishing agent according to claim 2, which comprises the following components in percentage by mass: 2% of refractory soil, 25% of foaming agent, 5% of cooked rubber powder, 5% of fly ash and the balance of water.
4. The colloidal foam fire extinguishing agent according to claim 2, which comprises the following components in percentage by mass: 1.5% of refractory soil, 27% of foaming agent, 3% of cooked rubber powder, 7% of fly ash and the balance of water.
5. The colloidal foam fire extinguishing agent according to claim 2, which comprises the following components in percentage by mass: 1% of refractory soil, 30% of foaming agent, 3.5% of cooked rubber powder, 9% of fly ash and the balance of water.
6. The colloidal foam fire extinguishing agent as defined in any one of claims 1 to 5, wherein the foaming agent is a w-101 composite type foaming agent.
7. The colloidal foam fire extinguishing agent according to any one of claims 1 to 5, wherein the fly ash has a particle size of 120 to 300 mesh.
8. The colloidal foam fire extinguishing agent according to any one of claims 1 to 5, wherein the particle size of the fire clay is 120 to 300 mesh.
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| CN102114316A (en) * | 2010-12-22 | 2011-07-06 | 北京林丰源生态科技有限公司 | Fire proofing and extinguishing agent composite for mine and preparation and use method thereof |
| CN106280164A (en) * | 2016-08-14 | 2017-01-04 | 邢延团 | Mining fire extinguishing macromolecular material, mining fire extinguishing gel rubber material and application thereof |
| CN106512276A (en) * | 2016-10-19 | 2017-03-22 | 安徽佳泰矿业科技有限公司 | Coal ash laminating type fire preventing and extinguishing agent and using method thereof |
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2020
- 2020-04-10 CN CN202010278107.8A patent/CN111298357B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1907518A (en) * | 2006-08-31 | 2007-02-07 | 西安森兰科贸有限责任公司 | Thickening colloid for coal bed fire hazard treating |
| CN101993574A (en) * | 2010-10-11 | 2011-03-30 | 陈孟伯 | Fireproof high-molecular compound colloid material for coal mines |
| CN102114316A (en) * | 2010-12-22 | 2011-07-06 | 北京林丰源生态科技有限公司 | Fire proofing and extinguishing agent composite for mine and preparation and use method thereof |
| CN106280164A (en) * | 2016-08-14 | 2017-01-04 | 邢延团 | Mining fire extinguishing macromolecular material, mining fire extinguishing gel rubber material and application thereof |
| CN106512276A (en) * | 2016-10-19 | 2017-03-22 | 安徽佳泰矿业科技有限公司 | Coal ash laminating type fire preventing and extinguishing agent and using method thereof |
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