Foam extinguishing agent for preventing and treating forest fire, preparation device and preparation method

Abstract

The invention discloses a foam extinguishing agent for preventing and treating forest fire as well as a preparation device and a preparation method. The foam extinguishing agent comprises a component A and a component B, wherein the component A is formed by mixing a base material and a foaming agent; the component B is formed by mixing a foam stabilizer, a flame retardant and aggregate, and the two components are uniformly mixed in water; the corresponding preparation device comprises a stirring and mixing main body, a first stirring structure, a second stirring structure and a double-layer porous plate, and the double-layer porous plate divides the interior of the stirring and mixing main body into a first stirring and mixing space, a second stirring and mixing space and a foam extinguishing agent forming space. The first stirring structure stirs and mixes materials in the first stirring and mixing space, the second stirring structure stirs and mixes materials in the second stirring and mixing space, and finally a foam extinguishing agent is prepared in the foam extinguishing agent forming space; the forest fire extinguishing agent has the characteristics of high foaming rate, large foaming amount and environmental friendliness, can quickly extinguish forest fire, is relatively low in cost and is suitable for fire extinguishing work of large-scale forest fire.

Description

Technical Field

[0001] The invention relates to the technical field of forest fire prevention and control, in particular to a foam fire extinguishing agent for preventing and controlling forest fires, a preparation device and a preparation method. Background Art

[0002] Forest fire is a highly destructive natural disaster. It not only causes serious damage to the ecological environment, but also threatens human life and property. With the impact of global climate change and human activities, the incidence and severity of forest fires are increasing, which puts higher requirements on fire-fighting technology. At present, traditional forest fire extinguishing methods mainly include water, foam, dry powder and chemical fire extinguishing agents. These methods can control the fire to a certain extent, but there are some obvious limitations. For example, water fire extinguishing agents are difficult to obtain in arid areas, and the fire extinguishing efficiency is limited by the size of the fire and terrain conditions; although foam fire extinguishing agents can cover the fire source, they are easy to evaporate quickly under high temperature and strong wind conditions, and the fire extinguishing effect is unstable; dry powder and some chemical fire extinguishing agents have a fast fire extinguishing speed, but may have long-term effects on the environment and human health. In the prior art, fluoroprotein foam fire extinguishing agents and water-film-forming foam fire extinguishing agents are two common forest fire extinguishing agents. They have certain advantages in fire extinguishing efficiency, but they also have the problem of insufficient rapid fire extinguishing efficiency and high cost when dealing with large-scale fires.

[0003] In view of the limitations of the prior art, how to provide a foam fire extinguishing agent for preventing and controlling forest fires, which can quickly extinguish forest fires, has good fire extinguishing stability, is environmentally friendly and has low cost, is the research and development direction of the present invention. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides a foam fire extinguishing agent, a preparation device and a preparation method for preventing and controlling forest fires. The foam fire extinguishing agent prepared by the present invention has the characteristics of high foaming rate, large foaming volume and environmental friendliness, so that it can quickly extinguish forest fires, has good fire extinguishing stability and low cost, and is suitable for extinguishing large-scale forest fires.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: a foam fire extinguishing agent for preventing and controlling forest fires, comprising component A and component B:

[0006] The component A is composed of 1 part of base material and 1 to 5 parts of foaming agent in parts by mass;

[0007] The B component is composed of 2 parts of foam stabilizer, 2 parts of flame retardant and 2 parts of aggregate in terms of mass fractions;

[0008] Add component A and component B into 85-95 parts of water and stir to mix evenly to obtain a foam fire extinguishing agent.

[0009] Furthermore, the water is deionized water, and the mass fraction of deionized water is 90 parts.

[0010] Furthermore, the base material is citric acid, the foaming agent is sodium bicarbonate, the foam stabilizer is polyvinyl alcohol, and the flame retardant is ammonium polyphosphate.

[0011] Furthermore, the aggregate is fly ash, calcium carbonate or a mixture of the two.

[0012] The above-mentioned preparation device of forest fire prevention and control foam fire extinguishing agent comprises a stirring and mixing body, a first stirring structure, a second stirring structure and a double-layer porous plate. The top of the stirring and mixing body is provided with a material injection port and a pressure relief hole. The material injection port is used to transport materials into the stirring and mixing body; a pressure relief valve is installed in the pressure relief hole to control the opening and closing of the pressure relief hole to discharge the gas inside the stirring and mixing body; the double-layer porous plate is installed in the stirring and mixing body to divide the interior into a first stirring and mixing space above the double-layer porous plate, a second stirring and mixing space below the double-layer porous plate and a foam extinguishing space in the middle of the double-layer porous plate. The fire extinguishing agent forming space is provided, and the first stirring structure is installed in the first stirring and mixing space, and is used for mixing and stirring the materials in the first stirring and mixing space; the second stirring structure is installed in the second stirring and mixing space, and is used for mixing and stirring the materials in the second stirring and mixing space; the foam fire extinguishing agents made in the first stirring and mixing space and the second stirring and mixing space are affected by the gas and enter the foam fire extinguishing agent forming space through the double-layer porous plate respectively, and a discharge port is provided on the side of the stirring and mixing body, and the discharge port is connected with the foam fire extinguishing agent forming space, and is used for discharging the foam fire extinguishing agent in the foam fire extinguishing agent forming space from the discharge port.

[0013] Furthermore, the aperture of the upper porous plate in the double-layer porous plate is larger than that of the lower porous plate. This structure can improve the mixing uniformity in the stirring container, help prevent the generated sodium citrate hydrate from clogging, adapt to materials of different particle sizes, and thus enhance the efficiency and effect of the stirring process.

[0014] Furthermore, the first stirring structure includes a first variable frequency motor and a blade stirring mechanism, the first variable frequency motor is installed on the top of the stirring and mixing body to drive the blade stirring mechanism to rotate in the first stirring and mixing space; the second stirring structure includes a second variable frequency motor and a scraper stirring mechanism, the second variable frequency motor is installed at the bottom of the stirring and mixing body to drive the scraper stirring mechanism to rotate in the second stirring and mixing space. During the stirring and mixing process, the scraper stirring mechanism continuously scrapes the bottom of the second stirring and mixing space through rotational motion, thereby destroying the deposited layer that may be formed, and can effectively prevent some substances from not reacting completely, so that they react fully, significantly improve the reaction efficiency inside the device, and facilitate the cleaning of the stirring container after use.

[0015] Furthermore, the volume of the first stirring and mixing space is larger than the volume of the second stirring and mixing space, and the volume of the second stirring and mixing space is larger than the volume of the foam fire extinguishing agent forming space; this distribution form helps most of the raw materials to be mixed in the first stirring and mixing space, while the second stirring and mixing space is smaller, which helps to further refine the distribution and reduce the sinking of large particles or solid sediments, thereby helping to promote uniform dispersion of gas, improve stirring efficiency and mixing effect, and the foam fire extinguishing agent formed by the fully stirred materials enters the smallest foam fire extinguishing agent forming space for output, thereby ensuring the stability of the output foam fire extinguishing agent. The inner wall of the first stirring and mixing space is a wavy ceramic inner wall. This inner wall shape can better guide the flow of raw materials, increase the contact between the raw materials and the blade stirring mechanism, thereby improving the mixing efficiency, and the ceramic inner wall is smooth and not easy to adhere to materials, which is convenient for cleaning and maintenance as well as the stability of the stirring process.

[0016] The preparation method of the above-mentioned preparation device has the following specific process: firstly, component A and component B are mixed respectively according to the required mass fractions to form component A and component B, and then component A and component B are placed into the stirring and mixing body through the injection port, wherein a part of component A and component B is in the first stirring and mixing space, and a part of component A and component B is in the second stirring and mixing space and the foam fire extinguishing agent forming space respectively through the double-layer porous plate, and then water is injected into the stirring and mixing body through the injection port, so that component A and component B in the foam fire extinguishing agent forming space flow into the second stirring and mixing space, and after the water injection is completed, the injection port is closed and the pressure relief valve is kept in a closed state, and at this time, the first stirring structure and the second stirring structure are started to respectively stir the first stirring The materials in the mixing space and the second stirring and mixing space are stirred and mixed, and gas is generated during the mixing and stirring process, thereby increasing the internal air pressure of the first stirring and mixing space and the second stirring and mixing space. As the gas generated continuously increases, the two stirring and mixing spaces pass through the double-layer porous plate to allow the gas to carry part of the mixture into the foam fire extinguishing agent forming space from different directions. The gas and mixture in the two stirring and mixing spaces collide in the foam fire extinguishing agent forming space to form a sufficiently disturbed area, and finally the mixture is further collided and mixed, and finally a foam fire extinguishing agent is formed and discharged from the discharge port to the collection container to complete the preparation process. After completion, the pressure relief valve is opened to discharge the gas inside the stirring and mixing body.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The foam fire extinguishing agent prepared by the present invention uses citric acid and sodium bicarbonate as foaming solutions. Sodium citrate and sodium bicarbonate are materials that can be mass-produced with good cost-effectiveness, and the reaction chemical rate of citric acid and sodium bicarbonate is fast, with a foaming multiple of 15 to 20 times, so that a large number of bubbles can be generated in a short time, and the foaming ability is excellent; the sodium citrate hydrate generated by the reaction has good stability as the main component for generating foam; polyvinyl alcohol is used as a foam stabilizer, which can improve the strength and solvent resistance after film formation, and is conducive to the formation of stable foam; the above characteristics enable the foam fire extinguishing agent of the present invention to quickly lay a fire isolation belt with good heat resistance and strong stability in forest fire emergency response, thereby effectively blocking the further spread and spread of the fire.

[0019] 2. The sodium citrate hydrate generated by the reaction of citric acid and sodium bicarbonate in the present invention has excellent stability, can maintain chemical stability during long-term storage, and avoid affecting its fire extinguishing efficiency due to corruption or deterioration. In addition, the constituent materials of the present invention, including citric acid, sodium bicarbonate, ammonium polyphosphate, and polyvinyl alcohol, are all environmentally friendly materials. After the reaction, they can be completely degraded by microorganisms in the soil without secondary pollution, and are suitable for a wide range of forest fire prevention application scenarios.

[0020] 3. The present invention adopts a specific preparation device to prepare foam fire extinguishing agent. The interior of the preparation device is divided into a first stirring and mixing space, a second stirring and mixing space and a foam fire extinguishing agent forming space. The materials in the two stirring and mixing spaces are stirred and mixed respectively by the first stirring structure and the second stirring structure. During the stirring and mixing process, the carbon dioxide and bubbles generated by the reaction of citric acid and sodium bicarbonate are evenly distributed to the cross-section of the entire stirring container through the double-layer porous plate to promote the uniform dispersion of the bubbles and carbon dioxide and to ensure that the reactants are fully stirred. In addition, in the foam fire extinguishing agent forming space in the middle of the double-layer porous plate, the gas and mixture in the two stirring and mixing spaces collide in the foam fire extinguishing agent forming space to form a sufficiently disturbed area, and finally the mixture is further collided and mixed to finally form a foam fire extinguishing agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the components of the present invention;

[0022] Figure 2 It is a schematic diagram of the fire extinguishing agent performance test content in the present invention;

[0023] Figure 3 This is a schematic diagram of the appearance structure of the preparation device in the present invention;

[0024] Figure 4 It is a schematic diagram of the internal structure of the preparation device in the present invention;

[0025] Figure 5It is a schematic diagram of the working process of the preparation device in the present invention.

[0026] In the figure: 1. stirring and mixing body; 2. first stirring and mixing space; 3. second stirring and mixing space; 4. foam fire extinguishing agent forming space; 5. first variable frequency motor; 6. pressure relief valve; 7. injection port; 8. blade stirring mechanism; 9. wavy ceramic inner wall; 10. double-layer porous plate; 11. discharge port; 12. scraper stirring mechanism; 13. second variable frequency motor. DETAILED DESCRIPTION

[0027] The present invention will be further described below.

[0028] like Figure 1 As shown, Example 1: includes component A and component B: the component A is composed of 1 part of citric acid and 1 part of sodium bicarbonate in terms of mass fractions; the component B is composed of 2 parts of polyvinyl alcohol, 2 parts of ammonium polyphosphate and 2 parts of a mixture of fly ash and calcium carbonate in terms of mass fractions; the component A and the component B are added together into 92 parts of deionized water, stirred and mixed evenly to obtain a foam fire extinguishing agent.

[0029] like Figure 3 and 4As shown, the preparation device of this embodiment includes a stirring and mixing body 1, a first stirring structure, a second stirring structure and a double-layer porous plate 10. The top of the stirring and mixing body is provided with a material injection port 7 and a pressure relief hole. The material injection port 7 is used to transport materials into the stirring and mixing body 1; a pressure relief valve 6 is installed in the pressure relief hole to control the opening and closing of the pressure relief hole to discharge the gas inside the stirring and mixing body 1; the double-layer porous plate 10 is installed in the stirring and mixing body 1, and its interior is divided into a first stirring and mixing space 2 above the double-layer porous plate 10, a second stirring and mixing space 3 below the double-layer porous plate 10 and a foam fire extinguishing agent-shaped space in the middle of the double-layer porous plate 10. The first stirring structure is installed in the first stirring and mixing space 2, and is used to mix and stir the materials in the first stirring and mixing space 2; the second stirring structure is installed in the second stirring and mixing space 3, and is used to mix and stir the materials in the second stirring and mixing space 3; the foam fire extinguishing agents made in the first stirring and mixing space 2 and the second stirring and mixing space 3 are affected by the gas and enter the foam fire extinguishing agent forming space 4 through the double-layer porous plate 10 respectively, and a discharge port 11 is provided on the side of the stirring and mixing body 1, and the discharge port 11 is connected with the foam fire extinguishing agent forming space 4, and is used to discharge the foam fire extinguishing agent in the foam fire extinguishing agent forming space 4 from the discharge port 11. The aperture of the upper porous plate in the double-layer porous plate 10 is larger than the aperture of the lower porous plate. This structure can improve the mixing uniformity in the stirring container, help prevent the generated sodium citrate hydrate from clogging, adapt to materials of different particle sizes, and thus enhance the efficiency and effect of the stirring process. The first stirring structure includes a first variable frequency motor 5 and a blade stirring mechanism 8, the first variable frequency motor 5 is installed on the top of the stirring and mixing body 1 to drive the blade stirring mechanism 8 to rotate in the first stirring and mixing space 2; the second stirring structure includes a second variable frequency motor 13 and a scraper stirring mechanism 12, the second variable frequency motor 13 is installed at the bottom of the stirring and mixing body 1 to drive the scraper stirring mechanism 12 to rotate in the second stirring and mixing space 3. The scraper stirring mechanism 12 continuously scrapes the bottom of the second stirring and mixing space 2 through rotation during the stirring and mixing process, thereby destroying the deposited layer that may be formed, and can effectively prevent some substances from not reacting completely, so that they react fully, significantly improve the reaction efficiency inside the device, and facilitate the cleaning of the stirring container after use.

[0030] As an improvement of the preparation device, the volume of the first stirring and mixing space 2 is larger than the volume of the second stirring and mixing space 3, and the volume of the second stirring and mixing space 3 is larger than the volume of the foam extinguishing agent forming space 4. The inner wall of the first stirring and mixing space 2 is a wavy ceramic inner wall 9. This inner wall shape can better guide the flow of raw materials, increase the contact between the raw materials and the blade stirring mechanism 8, thereby improving the mixing efficiency, and the ceramic inner wall is smooth and not easy to adhere to materials, which is convenient for cleaning and maintenance and the stability of the stirring process.

[0031] like Figure 5 As shown, the preparation method of the preparation device of this embodiment, the specific process is: first, mix the components A and B respectively according to the required mass fractions, and then put the components A and B into the stirring and mixing body 1 through the injection port 7, part of the components A and B are in the first stirring and mixing space 2, and part of them are in the second stirring and mixing space 3 and the foam fire extinguishing agent forming space 4 respectively through the double-layer porous plate 10, and then water is injected into the stirring and mixing body 1 through the injection port 7, so that the components A and B in the foam fire extinguishing agent forming space 4 enter the second stirring and mixing space 3 with the water flow, and after the water injection is completed, the injection port 7 is closed and the pressure relief valve 6 is kept in a closed state, and at this time, the first stirring structure and the second stirring structure are started to respectively stir the first stirring and mixing space 2. The materials in the stirring and mixing space 2 and the second stirring and mixing space 3 are stirred and mixed, and gas is generated during the mixing and stirring process, thereby increasing the internal air pressure of the first stirring and mixing space 2 and the second stirring and mixing space 3. As the gas generated continuously increases, the two stirring and mixing spaces pass through the double-layer porous plate 10 to allow the gas to carry part of the mixture into the foam fire extinguishing agent forming space 4 from different directions. The gas and the mixture in the two stirring and mixing spaces collide in the foam fire extinguishing agent forming space 4 to form a sufficiently disturbed area, and finally the mixture is further collided and mixed, and finally the foam fire extinguishing agent of Example 1 is formed and discharged from the discharge port to the collection container to complete the preparation process. After completion, the pressure relief valve 6 is opened to discharge the gas inside the stirring and mixing body 1.

[0032] Embodiment 2:

[0033] The preparation device and preparation method adopted in this embodiment are exactly the same as those in Embodiment 1, and the only difference is that this embodiment includes component A and component B: the component A is composed of 1 part of citric acid and 2 parts of sodium bicarbonate in terms of mass fractions; the component B is composed of 2 parts of polyvinyl alcohol, 2 parts of ammonium polyphosphate and 2 parts of a mixture of fly ash and calcium carbonate in terms of mass fractions; the components A and B are added together into 91 parts of deionized water, stirred and mixed evenly, to obtain the foam fire extinguishing agent of Embodiment 2.

[0034] Embodiment 3:

[0035] The preparation device and preparation method adopted in this embodiment are exactly the same as those in Embodiment 1, and the only difference is that this embodiment includes component A and component B: the component A is composed of 1 part of citric acid and 3 parts of sodium bicarbonate in terms of mass fractions; the component B is composed of 2 parts of polyvinyl alcohol, 2 parts of ammonium polyphosphate and 2 parts of a mixture of fly ash and calcium carbonate in terms of mass fractions; the components A and B are added together into 90 parts of deionized water, stirred and mixed evenly, to obtain the foam fire extinguishing agent of Embodiment 3.

[0036] Embodiment 4:

[0037] The preparation device and preparation method adopted in this embodiment are exactly the same as those in Embodiment 1, and the only difference is that this embodiment includes component A and component B: the component A is composed of 1 part of citric acid and 4 parts of sodium bicarbonate in terms of mass fractions; the component B is composed of 2 parts of polyvinyl alcohol, 2 parts of ammonium polyphosphate and 2 parts of a mixture of fly ash and calcium carbonate in terms of mass fractions; the components A and B are added together into 89 parts of deionized water, stirred and mixed evenly, to obtain the foam fire extinguishing agent of Embodiment 4.

[0038] Embodiment 5:

[0039] The preparation device and preparation method adopted in this embodiment are exactly the same as those in Embodiment 1, and the only difference is that this embodiment includes component A and component B: the component A is composed of 1 part of citric acid and 5 parts of sodium bicarbonate in terms of mass fractions; the component B is composed of 2 parts of polyvinyl alcohol, 2 parts of ammonium polyphosphate and 2 parts of a mixture of fly ash and calcium carbonate in terms of mass fractions; the components A and B are added together into 88 parts of deionized water, stirred and mixed evenly, to obtain the foam fire extinguishing agent of Embodiment 5.

[0040] like Figure 2 As shown, the foam fire extinguishing agents prepared by Examples 1 to 5 were subjected to performance tests and fire extinguishing experiments, and the test results were shown in Table 1.

[0041] Table 1: Fire extinguishing performance test results obtained in various embodiments:

[0042]

[0043] From the data in Table 1, it can be seen that each embodiment has the advantages of high foaming rate, large foaming amount and good fire extinguishing stability, and the performance and fire extinguishing effect of the foam fire extinguishing agent prepared in Example 3 are the best.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A foam fire extinguishing agent for preventing and controlling forest fires, characterized in that: Including component A and component B: The component A is composed of 1 part of base material and 1 to 5 parts of foaming agent in parts by mass; The B component is composed of 2 parts of foam stabilizer, 2 parts of flame retardant and 2 parts of aggregate in terms of mass fractions; Add component A and component B into 85-95 parts of water and stir to mix evenly to obtain a foam fire extinguishing agent.

2. The foam fire extinguishing agent for preventing and controlling forest fires according to claim 1, characterized in that: The water is deionized water, and the mass fraction of deionized water is 90 parts.

3. The foam fire extinguishing agent for preventing and controlling forest fires according to claim 1, characterized in that: The base material is citric acid, the foaming agent is sodium bicarbonate, the foam stabilizer is polyvinyl alcohol, and the flame retardant is ammonium polyphosphate.

4. The foam fire extinguishing agent for preventing and controlling forest fires according to claim 1, characterized in that: The aggregate is fly ash, calcium carbonate or a mixture of the two.

5. A device for preparing the forest fire prevention and control foam fire extinguishing agent according to any one of claims 1 to 4, characterized in that: The mixing machine comprises a stirring and mixing body, a first stirring structure, a second stirring structure and a double-layer porous plate. A material injection port and a pressure relief hole are provided on the top of the stirring and mixing body. The material injection port is used to transport materials into the stirring and mixing body. A pressure relief valve is provided in the pressure relief hole to control the opening and closing of the pressure relief hole so that the gas inside the stirring and mixing body is discharged. The double-layer porous plate is installed inside the stirring and mixing body, and the interior thereof is divided into a first stirring and mixing space above the double-layer porous plate, a second stirring and mixing space below the double-layer porous plate, and a foam fire extinguishing agent forming space in the middle of the double-layer porous plate. The first stirring structure is installed in the first stirring and mixing space, and is used to mix and stir the materials in the first stirring and mixing space; the second stirring structure is installed in the second stirring and mixing space, and is used to mix and stir the materials in the second stirring and mixing space; the foam fire extinguishing agents produced in the first stirring and mixing space and the second stirring and mixing space are affected by the gas and enter the foam fire extinguishing agent forming space through the double-layer porous plate respectively; a discharge port is provided on the side of the stirring and mixing body, and the discharge port is connected with the foam fire extinguishing agent forming space, and is used to discharge the foam fire extinguishing agent in the foam fire extinguishing agent forming space from the discharge port.

6. The preparation device according to claim 5, characterized in that: The aperture of the upper porous plate in the double-layer porous plate is larger than the aperture of the lower porous plate.

7. The preparation device according to claim 5, characterized in that: The first stirring structure includes a first variable frequency motor and a blade stirring mechanism, the first variable frequency motor is installed at the top of the stirring and mixing body to drive the blade stirring mechanism to rotate in the first stirring and mixing space; the second stirring structure includes a second variable frequency motor and a scraper stirring mechanism, the second variable frequency motor is installed at the bottom of the stirring and mixing body to drive the scraper stirring mechanism to rotate in the second stirring and mixing space.

8. The preparation device according to claim 5, characterized in that: The volume of the first stirring and mixing space is greater than that of the second stirring and mixing space, and the volume of the second stirring and mixing space is greater than that of the foam fire extinguishing agent forming space; the inner wall of the first stirring and mixing space is a corrugated ceramic inner wall.

9. A method for preparing the preparation device according to any one of claims 5 to 8, characterized in that: The specific process is as follows: first, component A and component B are mixed separately according to the required mass fractions, and then component A and component B are put into the stirring and mixing body through the injection port, part of component A and component B are in the first stirring and mixing space, and part of component A and component B are in the second stirring and mixing space and the foam fire extinguishing agent forming space respectively through the double-layer porous plate, and then water is injected into the stirring and mixing body through the injection port, so that component A and component B in the foam fire extinguishing agent forming space enter the second stirring and mixing space with the water flow, and after the water injection is completed, the injection port is closed and the pressure relief valve is kept in a closed state, at this time, the first stirring structure and the second stirring structure are started to stir the first stirring and mixing space and the first stirring and mixing space respectively. The materials in the two stirring and mixing spaces are stirred and mixed, and gas is generated during the mixing and stirring process, thereby increasing the internal air pressure of the first stirring and mixing space and the second stirring and mixing space. As the gas generated continuously increases, the two stirring and mixing spaces pass through the double-layer porous plate to allow the gas to carry part of the mixture into the foam fire extinguishing agent forming space from different directions. The gas and mixture in the two stirring and mixing spaces collide in the foam fire extinguishing agent forming space to form a sufficiently disturbed area, and finally the mixture is further collided and mixed, and finally a foam fire extinguishing agent is formed and discharged from the discharge port to a collection container to complete the preparation process. After completion, the pressure relief valve is opened to discharge the gas inside the stirring and mixing body.

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