Fossil powder mixed fire extinguishing water supply device

Abstract

We provide a fossil powder mixed fire extinguishing water supply device. [Solution] This device, dropped from an aircraft X or released from a fire hose 7, continuously mixes and supplies fire extinguishing water 1 with improved fire extinguishing performance by mixing fossil powder 3 with water 2. It includes a fossil powder storage tank containing fossil powder 3 that has been subjected to high-temperature drying and powder crushing processes, a fossil powder mixer 9 with a delivery pipe suspended from the tank and penetrating into the fire hose 7, the tip of which is bent in an L-shape and has an open fan-shaped trough, and a powder delivery rate adjustment valve installed midway through the delivery pipe. It also includes a surfactant supply unit 90 that supplies a predetermined concentration of surfactant to improve the uniformity of the mixture. This device enables the efficient and continuous mixing of fossil powder with fire extinguishing water, improving fire extinguishing performance and making effective use of fossil materials.

Description

[Technical Field]

[0001] This invention relates to a fire extinguishing water supply device used for fire fighting activities in forests and other areas, and in particular to a device that mixes naturally occurring fossil powder into the fire extinguishing water and supplies it. Furthermore, the present invention relates to a technology that adds a control function for the mixture concentration and the combined use of a surfactant to this supply device to improve fire extinguishing performance and to be able to respond to various situations. [Background technology]

[0002] Traditionally, firefighting activities have used water, seawater, groundwater, and water stored for firefighting. Records of aerial firefighting activities during the forest fire in Ofunato City, Iwate Prefecture, from February 26, 2025, show that a total of 211 helicopters were used in firefighting activities, with 2,261 flights and a total amount of water sprayed of 6,987 kiloliters. Depending on the situation, foam fire extinguishing agents, powder fire extinguishing agents, etc. were used together with or separately from water. It is not always possible to prepare a sufficient amount of firewater for extinguishing fires, and in order to increase fire-fighting efficiency, it may be effective to use fire-extinguishing agents that improve fire-extinguishing performance.

[0003] According to the Fire and Disaster Management Agency's records explaining the 2025 forest fire in Ofunato City, Iwate Prefecture, and the report of the "Committee on the Form of Firefighting Measures," records include "consideration of the effective use of fire extinguishing agents" and "consideration of methods for evaluating the effectiveness of individual fire extinguishing agents against fires and their impact on health and the environment." Many of these conventional fire extinguishing agents or fire extinguishing agents contain chemical compounds as their main components, raising concerns about their environmental impact and their effects on the human body. Additionally, it can be difficult to obtain the necessary amounts of fire extinguishing agent at the scene of a fire.

[0004] On the other hand, there are fossil layers made of natural materials distributed along mountain coasts. These include fossil products collected from layers that actually exist at the disaster site, fossil materials from foreign countries (Morocco and America), and fossil products collected from fossil layers where collection is legally permitted in Japan. The naturally derived fossil powder is primarily composed of calcium carbonate, and generates carbon dioxide through thermal decomposition and has heat absorption properties, so according to the inventor's knowledge it has potential as an auxiliary fire extinguishing material. The inventor noticed this possibility and devised ways to utilize it. The role of fossils in fire extinguishing agents is that the main components of fossil powder, calcium carbonate and calcium oxide, generate carbon dioxide when thermally decomposed, which may help extinguish the fire by reducing the oxygen concentration. Its heat absorption properties at high temperatures help lower the temperature of the source of the fire, and the increased surface area achieved by pulverizing it enhances its heat absorption. When mixed with fire-fighting water, it enhances both the cooling effect and the gas-blocking effect. Fossil powder has the potential to aid in firefighting due to these effects, and finely powdered shell fossils in particular have a fire-extinguishing effect.

[0005] However, fossil powder poses challenges in ensuring stable mixing and dispersibility in firefighting water. In addition, it is difficult to adjust the powder concentration according to the on-site conditions and to quantitatively evaluate the fire extinguishing performance, so more advanced equipment is required. Perhaps for this reason, the applicant is not aware of any device that can efficiently and safely mix fossil powder into firefighting water. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Laid-Open Publication No. 194725 / 1998 (Patent Document 1) is an invention entitled "Ultrafine Powdered Shell Fossils," which involves heat-treating shell fossils at a temperature between 150°C and 300°C to remove water of crystallization and activate them to produce heat-treated shell fossils, which are then converted into ultrafine powdered shell fossils containing at least 60% by weight, preferably 80% by weight, of particles with a particle size of 5 μm or less, and which can be used primarily as a water purifier, a fish spawning inducer, and an organism growth promoter. While Patent Document 1 is concerned with the use of the fossil powder, it does not disclose any other applications or any particular fire-extinguishing properties. Summary of the Invention [Problem to be solved by the invention]

[0007] The primary objective of this invention is to develop a device for supplying fossil powder-mixed fire extinguishing water for fires, which supplies fire extinguishing water with improved fire extinguishing performance by stably and safely mixing fossil powder, particularly fine powder of shell fossils, that has been subjected to high-temperature drying treatment into the flowing fire extinguishing water.

[0008] Fossil powder mixed fire extinguishing water with performance suited to the current fire situation is adjusted, and by spraying or dropping it on the scene, it contributes to quick fire extinguishing.

[0009] The fossil powder mixed fire extinguishing water is required to comply with the fire extinguishing agent performance standards set by the relevant laws and regulations of each country, and to have a low toxicity composition that does not pollute the environment. For example, shell fossils from Toyama Prefecture in the Hokuriku region are sold commercially in 20kg bags, making them readily available. Fossil powder is sold commercially as a commercial product under names such as "shell fossil powder," "natural lime material," and "organic soil improvement material."

[0010] The second purpose of this invention is to improve the dispersibility of the fine powder of shell fossils in fire-fighting water, thereby improving fire-fighting performance. The third purpose of this invention is to provide a device that can easily adjust the concentration of shell fossil powder mixed in according to the on-site conditions, thereby controlling the fire extinguishing performance and enabling the effectiveness of the fire extinguishing performance to be evaluated. [Means for solving the problem]

[0011] The device for supplying fossil powder-mixed fire extinguishing water of this invention is characterized by a mixing mechanism that adjusts and mixes fossil powder, particularly fine shell fossil powder, that has been subjected to high-temperature drying treatment with water, and a check valve installed in the discharge path of the mixed fire extinguishing water.

[0012] The fossil powder mixed fire extinguishing water supply device of the present invention has the following configuration. It is equipped with a powder storage tank that stores fine powder of fossils that has been subjected to high-temperature drying. A delivery pipe is provided for supplying powder from the powder storage tank to the fire hose, and the delivery pipe is equipped with a powder delivery rate regulating valve. Alternatively, a delivery pipe is provided for supplying powder from the powder storage tank to the water storage tank, and the delivery pipe is provided with a powder delivery amount adjustment valve. The fire extinguishing water discharge outlet is provided with a backflow prevention valve or other device with the same function, which is a backflow prevention means for preventing the backflow of fire extinguishing water.

[0013] To mix fossil powder in a water tank or fire hose, a mixer is installed midway along the water tank supply hose or fire hose. The mixing in the water tank may be performed using a mechanical agitator. In addition, the water tank is equipped with a cooling device to cool the temperature of the fire extinguishing water. The mixer uses the pressure difference of the water flow to automatically mix fossil powder and liquid containing fossil powder inside a hose, and is equipped with a fan-shaped concave trough structure at the outlet where the fine powder is attracted, dripped, and mixed from the powder storage tank. The fossil powder is entrained and mixed in the hydraulic flow of water in a pipe such as a fire hose. A mixer installed in the middle of the hose directs part of the main water flow to the fossil powder outlet, mixing it proportionally with the water flow.

[0014] The fossil powder mixed fire extinguishing water supply device of the present invention specifically has the following configuration: A: A fossil powder storage tank that stores fossil powder that has been dried at high temperatures and crushed into powder. The fossil powder is mainly composed of shell fossils, which are crushed to a particle size of 150 μm or less. B: Mixer: A device that generates powder-mixed fire extinguishing water. It detects the water flow speed, pressure, and temperature in the fire hose, and controls the amount of fossil powder supplied by installing a powder supply adjustment valve in the fossil powder delivery pipe. It mixes the fossil powder with water and supplies the fire extinguishing water. C: In the mixer, a fan-shaped concave trough is formed at the L-shaped bent outlet of the supply pipe hanging down from a pipe with water flow, and the water is mixed automatically by the water flow. D: The fossil powder supply pipe is equipped with a backflow prevention valve leading to the stone powder storage tank. E: Fire extinguishing water is sprayed from a fire hose or stored in a fire extinguishing water container detachably hung on the aircraft and dropped from the sky to extinguish the fire.

[0015] F: Furthermore, a surfactant supply unit is provided that stores a nonionic surfactant and supplies the surfactant to the fire extinguishing water at a predetermined concentration. The surfactant prevents the agglomeration of the shell fossil powder and improves its dispersibility. Increases the effective range of fire extinguishing water. With these configurations, fire extinguishing water mixed with fossil powder is released at the same time as the fire extinguishing water flows out, and the fire extinguishing water has improved fire extinguishing performance, which is expected to increase fire extinguishing efficiency. [Effects of the Invention]

[0016] Fossils are scattered throughout the country, but their use up until now has been limited to agricultural soil conditioners, as in Patent Document 1. The inventor of this invention discovered that fossil powder could be used as an auxiliary agent for fire extinguishing. With the above configuration, the present invention has the following technical advantages. 1. Naturally derived fossil powder can be stably mixed into fire extinguishing water. 2. The amount of fossil powder delivered can be adjusted, allowing operation according to the scale and target of the fire. 3. The mixer structure is not complicated and can be mixed automatically by the force of the water flow of the fire extinguishing water. 4. It can be easily installed in existing fire extinguishing equipment, and even when retrofitted, the backflow prevention valve provides high safety, and a synergistic effect can be expected when used with existing equipment. 5. Naturally derived fossil powder leaves no harmful residue after extinguishing a fire, and has a low environmental impact. Sustainable firefighting technology can be realized. 6. The fossil powder concentration adjustment valve maintains the optimum mixture concentration according to the site conditions. Quantitative evaluation of the fire extinguishing performance for each specified concentration makes the effectiveness of the device visible, enabling continuous improvement. The fire extinguishing water sprayed from the fossil powder mixed fire extinguishing water supply device can be measured using a fire extinguishing performance evaluation module (performance check tool) to measure the temperature change of the object being extinguished, the fire extinguishing time, and the residual heat, and record the fire extinguishing performance. 7. Fossil powder can be used as a fire extinguishing aid to provide firewater with improved extinguishing performance, and by using it in combination with a surfactant, the fire extinguishing performance can be stabilized, contributing to the efficiency of forest fire extinguishing. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is an overall explanatory diagram of an embodiment of a fossil powder mixed fire extinguishing water supply device according to the present invention. [Figure 2] Figure 2 is an embodiment showing a fossil powder mixed fire extinguishing water supply device according to the present invention, and is an explanatory diagram of the device which operates by dropping fire extinguishing water from an aircraft and by discharging fire extinguishing water from a fire hose. [Figure 3] 3 is a perspective view of the fossil powder mixer used in the embodiment of the present invention. The fossil powder is automatically mixed into the water flow from the pump by adjusting the powder delivery amount. [Figure 4] FIG. 4 is a perspective view of a supply device for fossil powder mixed fire extinguishing water used in a fire extinguishing water discharge ceremony in which water is discharged from a fire hose. DETAILED DESCRIPTION OF THE INVENTION

[0018] The basic form of the fossil powder mixed fire extinguishing water supply device of this invention is characterized by a mixing mechanism that adjusts and mixes fossil powder 3, particularly fine shell fossil powder 3, which has been subjected to high-temperature drying treatment, into water 2, and the provision of a check valve safety mechanism in the fine powder 3 passage and the fire extinguishing water 1 discharge path.

[0019] An embodiment of the present invention will be described with reference to FIG. FIG. 1 is an overall explanatory diagram of a first embodiment showing a supply device for fossil powder-mixed fire extinguishing water according to the present invention. The fossil powder mixed fire extinguishing water supply device comprises a fire extinguishing water container 10 that is detachably mounted on an aircraft X (drone) and that drops fire extinguishing water, a water tank 4 that stores the fire extinguishing water 1 mixed with fossil powder 3 that is pumped up by the container 10, and a fossil powder mixer 9 that mixes water 2 with fossil powder 3 to create the fire extinguishing water 1. The fossil powder mixer 9 inserts the tip of the fossil powder 3 delivery pipe 92 into the fire hose 7 through which water 2 delivered by the pump 8 flows, and the fossil powder 3 is drawn down into the flow of the running water and mixed therein. The fossil powder mixer 9 is also provided with a surfactant supply unit 90 . By mixing a surfactant into the fossil powder 3, the dispersibility can be increased and the fire extinguishing performance can be improved. The water tank 4 is provided with a stirring device 5 that can directly add and stir the fossil powder 3 and a cooling device 6 that cools the fire extinguishing water 1.

[0020] When a considerable amount of fire extinguishing water 1, a mixture of water 2 and fossil powder 3, is stored in the water tank 4, the fire extinguishing water container 10 descends, takes in and stores the fire extinguishing water 1, and closes with the opening / closing lid 11 (check valve). The fire-extinguishing water container 10 is fitted onto the connecting part of the flying object X (drone or helicopter), transported to the fire scene, and drops the fire-extinguishing water 1 from the air. The flying object X is a drone or a disaster prevention helicopter having a water discharge module that opens an opening / closing cover 11 at a predetermined position in the air.

[0021] The fossil powder mixed fire extinguishing water supply device of FIG. 1 is also an embodiment of a fire extinguishing water discharge type in which the fire extinguishing water is discharged from a fire hose 7. The tip of the delivery pipe 92 for the fossil powder 3 is inserted into the fire hose 7 through which the water 2 delivered by the water pump 8 flows, and a supply pipe 95 for the fine powder is arranged. The supply pipe 95 draws the fossil powder 3 downward into the flowing water and mixes it. The mixed fire extinguishing water 1 is then sprayed directly from the fire hose 7 through the fire extinguishing nozzle. The mixed fire-fighting water 1 can be stored in the water tank 4 as described above and prepared for the fire-fighting water container 10, if necessary. The fire hose 7 may be provided with a cooling device 6 for cooling the fire extinguishing water 1 . In order to improve the fire extinguishing performance of the fire extinguishing water 1, it is preferable that the fossil powder 3 is dispersible and the water temperature is low.

[0022] Figure 2 is an explanatory chart showing an embodiment of the fossil powder mixed fire extinguishing water supply device of Figure 1, showing that there are two types: a type in which fire extinguishing water is dropped from an aircraft X, and a type in which fire extinguishing water is discharged from a fire hose 7. At the scene of a forest fire, firefighters spray water to extinguish the fire and water is dropped from an aircraft to extinguish the fire simultaneously.

[0023] This invention proposes the use of fossil powder as a fire extinguishing aid, and in order to fully utilize its components for fire extinguishing performance, shell fossils are specifically selected and subjected to high-temperature drying and crushing to produce fossil powder with a particle size of 150 μm or less. The particle size selection is related to the dispersibility depending on the fire target, and is divided into stages: 100-50 μm, 50-10 μm, 10-3 μm, and 3 μm or less. The fossil powder 3 having a predetermined particle size is put into the powder storage tank 91 of the fossil powder mixer 9 described below, and is mixed into running water at a powder concentration in the range of 0.5 to 3.0% by weight using the powder delivery amount adjustment valve 93 provided on the delivery pipe 92, to produce the fire extinguishing water 1. The particle size and the concentration of the fossil powder 3 are not limited. Furthermore, the fossil powder 3 may be in the form of a dry powder or a liquid that has been previously stirred into water.

[0024] FIG. 3 is a perspective view of a fossil powder mixer 9 used in an embodiment of the present invention. A delivery pipe 92 is installed vertically from a powder storage tank 91 that stores fossil powder 3, a powder delivery amount adjustment valve 93 is installed midway along the delivery pipe 92, and a backflow prevention valve 94 is installed below that.Furthermore, the tip of the delivery pipe 92 for the fossil powder 3 is inserted into a fire hose 7, and a supply pipe 95 for the fossil powder 3 is placed midway inside the fire hose 7, and the supply pipe 95 is bent at a right angle to form a concave gutter 96 that diverges in a fan-like or tapered shape in a direction parallel to the flow direction of the water from the fire hose.

[0025] The fossil powder 3 comes out onto the surface of the concave gutter 96, which is flared and parallel to the direction of the flowing water. By forming a concave gutter 96 at the outlet of the supply pipe 95 that flares out in a direction parallel to the flow direction of the fire hose 7, fine powder of shell fossils is mixed into the flowing water while physically suppressing the backflow of the fire water 1. The outlet of the powder supply pipe 95 connected to the fire hose 1 has a shape similar to that of a diverging trough (diffusion groove) 96, i.e., a tapered shape that gradually widens in the direction of the powder flow, and various shapes are possible as long as it is designed so that the powder is diffused and mixed into the flow according to the flow rate and pressure of the fire extinguishing water. The cross-sectional shape (for example, V-shape, U-shape) and taper angle of the recessed gutter 96 are not important. The basic shape of the recessed gutter 96 is a flat plate with vertical edges on the sides, which is fan-shaped when viewed from above and opens at an angle of about 45 degrees. The fan-shaped surface is polished to a smooth finish.

[0026] Since the fossil powder is dispersed on the concave gutter surface and the flow rate does not decrease, backflow into the powder supply pipe 95 is physically suppressed, and a certain degree of backflow prevention effect can be obtained even without using a backflow prevention valve. In addition, the shape of the recessed gutter 96 improves the dispersibility of the powder and increases the efficiency of mixing with the fire extinguishing water. This configuration has no mechanical moving parts and is easy to maintain. In this way, the fossil powder 3 is dispersed in the flow of the running water, and is gradually attracted down from the supply pipe 95 and mixed. The mixed fire extinguishing water 1 is then sprayed directly from the fire hose 7 through the fire extinguishing nozzle.

[0027] A powder delivery amount adjusting valve 93 for adjusting the amount of powder delivered is provided on a delivery pipe 92 suspended from a powder storage tank 91 for storing fossil powder 3, so that a predetermined amount is continuously delivered. The fire extinguishing water 1 having a certain concentration and dispersibility is provided according to the flow rate of the water 2 pumped from the water pump 8. The powder delivery rate adjusting valve 93 can be manually operable. When the water flow velocity is high, the powder delivery amount is set to a large amount using the powder delivery amount adjustment valve 93 to increase the concentration, and when the water flow velocity is low, the powder delivery amount adjustment valve 93 is narrowed to reduce the amount, thereby obtaining fire extinguishing water 1 with a stable concentration and maintaining fire extinguishing performance.

[0028] FIG. 4 is a perspective view of a second embodiment of the fossil powder mixed fire extinguishing water supply device according to the present invention, which is implemented in a fire extinguishing water discharge system in which water is discharged from a fire hose 7. The mixing mechanism including the powder storage tank 91 and the spacer (hollow tube) 71 is integrated into a unit. A spacer 71 is placed midway through a fire hose 7 connected to a fire pump 8, and a fossil powder mixer 9 is attached to it.

[0029] This fossil powder mixer 9 has a delivery pipe 92 suspended from a powder storage tank 91, a powder delivery amount adjustment valve 93 installed midway along the delivery pipe 92, and a backflow prevention valve 94 installed below that.Furthermore, the tip of the delivery pipe 92 for the fossil powder 3 is inserted into a hollow circular spacer 71, and a supply pipe 95 for the fossil powder 3 is placed midway inside the spacer 71, and the supply pipe 95 is bent at a right angle to form a fan-shaped concave gutter 96 parallel to the direction of the water flow from the fire hose. The mixing mechanism including the powder storage tank 91 is integrated into a fossil powder mixer unit. The fossil powder mixer 9 equipped with the spacer 71 is portable and can be attached and detached to any position on the fire hose 7, and can also be retrofitted to existing firefighting equipment. Fossil powder and fine powder of shell fossils can be mixed into the flowing firewater relatively easily.

[0030] With the configurations of Examples 1 and 2, the fossil powder 3 is prevented from flowing back into the powder storage tank 91, safety is ensured, and the fossil powder 3 is mixed and dispersed at a predetermined concentration to become fire extinguishing water 1, which is then discharged. It was confirmed that fire extinguishing water 1 from the fossil powder mixed fire extinguishing water supply device shortens the fire extinguishing time and reduces the environmental impact of the residue after fire extinguishing compared to extinguishing with ordinary water. It is possible to stably provide fire extinguishing water 1 with improved fire extinguishing performance.

[0031] Firefighting experiment 1: Portable equipment for forest fires In order to respond to forest fires in mountainous areas, the fossil powder mixer unit of Example 2, which can be connected to a fire hose 1, was designed as an independent portable unit, and was transported to the fire scene by human power, and the mixer unit including the spacer 71 was connected to the middle part of the fire hose 1 to carry out firefighting activities. The powder storage tank 91 was filled with fossil powder 3 that had been crushed to a particle size of about 3 μm and dried at high heat. At the scene, firefighters adjusted the amount of mixed powder using the manual discharge amount adjustment valve 93 and discharged the fossil powder mixed fire extinguishing water 1 from the fire extinguishing nozzle to carry out fire extinguishing operations. As a result, the spread of the fire was suppressed and the fire was quickly extinguished. The amount of water used for firefighting was reduced by approximately 15%.

[0032] Fire extinguishing experiment 2: Application to an indoor electrical fire This device was used as a supplementary material for fire extinguishing water in the event of an indoor electrical equipment fire, without damaging the insulation. A portable fossil powder mixer unit was connected to the middle of fire hose 1 at the fire scene and firefighting activities were carried out. It has been confirmed that fossil powder is non-conductive, and no corrosion or conduction problems were observed in electrical equipment after the fire was extinguished, confirming that it is highly safe and environmentally compatible even in electrical environments. The fire extinguishing water used for fire extinguishing contained 0.8% by weight of powder with a particle size of 150 μm or less.

[0033] Firefighting experiment 3: Odor suppression effect in livestock barn fires This device was used to extinguish a fire that broke out in a livestock barn by spraying water containing 1.2% by weight of fossil powder. The foul odor generated by the burned organic matter was significantly reduced after the fire was extinguished, and the fire was extinguished in a way that contributed to improving the safety of workers and the working environment. In addition, the remaining powder can be reused as compost material, which also reduces fire waste.

[0034] Fire extinguishing experiment 4: Improving dispersibility by using surfactants By adding 0.1 wt % of a nonionic surfactant (polyoxyethylene type), aggregation of the fossil powder 3 was prevented, resulting in a more uniform dispersion. The spray range of fire extinguishing water has been expanded, increasing the fire extinguishing area by approximately 25%.

[0035] Experimental evaluation 5: Quantitative evaluation of fire extinguishing performance in fire extinguishing experiments A temperature sensor was placed on the object to be extinguished, and the time from the start of extinguishing to the object's surface temperature dropping below 100°C was measured. The average time to extinguish a fire was reduced by 18% compared to regular water. The evaluation results can be reflected in the concentration setting of the next fossil powder 3 and used. [Industrial Applicability]

[0036] Fossils are found scattered throughout Japan, but until now, most of their industrial use has been as soil conditioners, using the fossil components as they are. This invention was achieved by exploring industrial uses for fossils and shell fossils. By mixing them with water, it is possible to provide firewater with improved fire-extinguishing performance. As it is a natural material, its use has little impact on the environment, which has expanded its potential for use in firefighting, such as forest fires. This device, which can instantly produce fire-extinguishing water at the scene of a fire and extinguish it by dropping it from an aircraft or spraying it with a fire hose, can be widely used in firefighting. [Explanation of symbols]

[0037] X Aircraft (drones, helicopters) 1 Fire extinguishing water 2 Water (rainwater seawater) 3 fossil powder 4. Water tank 5. Stirring device 6 Cooling device 7. Fire Hose 71 Spacer (hollow tube) 8. Water pump 9 Fossil powder mixer 90 Surfactant supply unit 91 Powder storage tank 92 Delivery pipe 93 Powder delivery rate adjusting valve 94 Check valve 95 Supply pipe 96 Concave gutter 10 Fire Water Container 11 Opening and closing lid

Claims

1. A device for supplying fire extinguishing water that is dropped from an aircraft or discharged from a fire hose, the device comprising the following components: A. A fossil powder storage tank that stores fossil powder that has been dried at high temperatures and crushed into powder. B. A mixer in which a fossil powder delivery pipe is installed vertically in the fossil powder storage tank and penetrates into the fire hose, the tip of which is bent in an L shape when viewed from the side, and a fan-shaped concave trough with an open top is provided, which mixes the fossil powder with the water flowing through the fire hose and supplies it. C. A fossil powder delivery pipe with a powder delivery rate adjustment valve installed midway.

2. A device for supplying fire extinguishing water that is dropped from an aircraft or discharged from a fire hose, the device comprising the following components: A. A fossil powder storage tank that stores fossil powder that has been dried at high temperatures and crushed into a fine powder. B. A mixer in which a fossil powder delivery pipe is installed vertically in the fossil powder storage tank and penetrates into the fire hose, the tip of which is bent in an L shape when viewed from the side, and a fan-shaped concave trough with an open top is provided, which mixes the fossil powder with the water flowing through the fire hose and supplies it. C. A fossil powder delivery pipe with a powder delivery rate adjustment valve installed midway. D. A surfactant supply unit that mixes surfactant into the firefighting water and is attached to the fossil powder storage tank.

3. 3. The apparatus for supplying fossil powder-mixed fire extinguishing water according to claim 1, wherein the fossil powder mixed with the fire extinguishing water is shell fossil powder.

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