JP2007029125A - Auxiliary material for fire extinguishing and method for fire-extinguishing flammable liquid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely extinguish a fire by fire foam or a powder fire extinguishing material even in the case of a fire on the entire surface of flammable liquid in an oil tank whose diameter is 80-90 m or the like with respect to an auxiliary material for fire extinguishing. <P>SOLUTION: The auxiliary material 1 for fire extinguishing is a hollow glass bead composed of the glass of a waste material whose outer diameter R is about 4-8 mm and thickness t is about 0.5-2 mm. By successively feeding them, since the temperature of a flame is lowered as well by a heat insulating effect, a heat insulating layer and an air interrupting layer formed on the surface of the flammable liquid such as petroleum are not destroyed. Since the heat conductivity of the hollow glass beads 1 is about 0.09 W/(m×K) and is smaller than any substances other than air, the hollow glass beads 1 indicate an excellent heat insulation property. When a square metal vat whose one side is about 1 m is filled with kerosene, it is fired, and the hollow glass beads 1 are successively fed when a flame is spread to the entire surface, the power of the flame is rapidly weakened, and it is immediately extinguished when the fire foam is jetted with a foam extinguisher on the market. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the case of a fire of a flammable liquid such as an oil tank fire or a tanker (oil transport ship) fire in an oil complex or the like, the present invention is applied to the surface of the flammable liquid before jetting of a foam fire extinguisher or a powder fire extinguisher. The present invention relates to a fire extinguishing auxiliary material for facilitating fire extinguishing with a foam fire extinguishing agent and a powder fire extinguishing agent, and a fire extinguishing method for a flammable liquid.

In the event of a fire in crude oil and oil refined products (naphtha, gasoline, kerosene, light oil, etc.) stored in oil tanks, etc. in oil complexes, foam extinguishing agents are most effective against oil fires According to the regulations of Japan's Fire Service Law, it is obliged to install fixed protein foam fire extinguishing equipment for liquid tanks with a surface area of 40 m ² or more (diameter 7.1 m or more) or tank height 6 m or more for crude oil etc. It has been. However, since it is difficult to fully automate the foam fire extinguishing equipment, it is necessary to manually detect fires, start the pump, and operate the valve. Moreover, the liquid supply pipe can reach several hundred meters, and it takes several seconds from the start to the foam discharge. If it takes time and the delay in finding the fire is added, the initial fire extinguishment may not be in time and the entire fire may be expanded. In such a case, it will be extremely difficult to extinguish even with the foam fire extinguishing equipment.

Therefore, in Patent Document 1, a water film is formed and bubbles are formed on the flammable oil, and the water film having an effective fire extinguishing capability not only for the flammable oils but also for the fire of the water-soluble flammable liquids. A foam is disclosed. Further, in Patent Document 2, a local fire on a floating roof tank can be safely and initially extinguished in place of the halon fire extinguishing equipment that can no longer be used as a cause of ozone layer destruction, and the coexistence with foam is also good. A fire extinguishing device for a roof tank is disclosed.
JP 2000-126327 A JP 2000-140142 A

  However, in the fire extinguishing performance test for the water film foam extinguishing agent described in Patent Document 1, the fire extinguishing performance is examined when 200 ml of water-soluble flammable liquid is put into a stainless steel container having a diameter of 90 mm and a depth of 90 mm and ignited. In the case of an oil tank or a huge tanker with an actual diameter of 80m to 90m, in the event of a full-scale fire, the foam sucks in oil and burns, and it takes time to extinguish the fire. . Also, the floating roof tank fire extinguishing device described in Patent Document 2 is supposed to be able to extinguish the fire reliably. However, in the event of a full-scale fire, the powder and foam still absorb the oil and burn and extinguish. There was a problem that it took time.

  In view of this, the present invention is surely shortened by a foam extinguishant and / or a powder extinguisher even in the case of a full fire of a flammable liquid in an oil tank or a tanker (oil transport ship) having a diameter of 80 to 90 m. It is an object of the present invention to provide a fire extinguishing auxiliary material that can be extinguished in time and a method for extinguishing a combustible liquid.

  The auxiliary material for fire extinguishing according to the invention of claim 1 is an auxiliary material for extinguishing fire in the event of a fire of flammable liquid, and is a hollow particle of an inorganic compound and has a specific gravity within a range of 0.2 to 0.6 for a short time. The heat resistance is in the range of 1300 ° C. to 1600 ° C., and the flammable liquid is injected before the foam extinguishing agent and / or the powder extinguishing agent is injected, or at the same time as the foam extinguishing agent and / or the powder extinguishing agent is injected. The heat insulating layer and the air barrier layer are formed by spraying on the surface.

  Here, “short-time heat resistance” refers to not dissolving even when placed in a predetermined temperature range for several seconds (usually 3 to 5 seconds). “Injecting foam and / or powder fire extinguishing agent” means injecting only foam extinguishing agent, injecting only powder extinguishing agent, and injecting both foam extinguishing agent and powder extinguishing agent. It means to include all the cases.

  The auxiliary material for fire extinguishing according to the invention of claim 2 is the structure of claim 1, wherein the hollow particles of the inorganic compound have oil resistance.

  The auxiliary material for fire extinguishing according to the invention of claim 3 is the structure of claim 1 or claim 2, wherein the hollow particles of the inorganic compound are hollow glass beads.

  An auxiliary material for extinguishing fire according to the invention of claim 4 is an auxiliary material for extinguishing fire in the event of a fire of a flammable liquid, wherein a plurality of hollow glass beads are fused or a plurality of hollow glass beads are inorganic A glass bead block formed by bonding with an adhesive and having a specific gravity in the range of 0.2 to 0.6, before spraying foam extinguishing agent and / or powder extinguishing agent, or foam extinguishing agent and / or powder Simultaneously injecting a fire extinguisher, only a plurality of the glass bead blocks or a plurality of the hollow glass beads are mixed and dispersed on the surface of the flammable liquid to form a heat insulating layer / air barrier layer. is there.

  A fire extinguishing auxiliary material according to the invention of claim 5 is a fire extinguishing auxiliary material at the time of fire of a flammable liquid, formed by adding a foaming agent using glass as a main raw material, and foaming inside during firing. Hollow fine-bubble glass block having a specific gravity in the range of 0.2 to 0.6, before or before spraying the foam and / or powder extinguisher, or the foam and / or powder extinguisher At the same time, a plurality of hollow glass beads or a plurality of hollow glass beads are mixed and dispersed on the surface of the flammable liquid to form a heat insulating layer / air barrier layer. .

  The auxiliary material for fire extinguishing according to the invention of claim 6 is the structure of claim 4 or claim 5, wherein the plurality of hollow glass beads are fused or the plurality of hollow glass beads are bonded with an inorganic adhesive. The glass bead block formed by bonding or the hollow fine bubble glass block has a length within a range of 10 mm to 500 mm, a width of 10 mm to 500 mm, and a thickness of 10 mm to 100 mm, more preferably a length of 80 mm to 200 mm, a width. The size is in a range of 80 mm to 200 mm and a thickness of 15 mm to 50 mm.

  The auxiliary material for fire extinguishing according to the invention of claim 7 is the structure according to any one of claims 3 to 6, wherein the hollow glass beads or the hollow fine bubble glass block is manufactured from waste glass. is there.

  The auxiliary material for fire extinguishing according to the invention of claim 8 is the structure according to any one of claims 1 to 7, wherein the outer diameter of the hollow particles of the inorganic compound or the hollow glass beads is about 1 mm to about 20 mm. Within the range, more preferably within the range of about 4 mm to about 8 mm.

  The auxiliary material for fire extinguishing according to the invention of claim 9 is the heat conduction of the hollow particles of the inorganic compound, the hollow glass beads, or the hollow fine-bubble glass block in the structure of any one of claims 1 to 8. The rate is in the range of about 0.05 W / (m · K) to about 0.2 W / (m · K), more preferably about 0.07 W / (m · K) to about 0.1 W / (m · K). ).

  The auxiliary material for fire extinguishing according to the invention of claim 10 is the structure according to any one of claims 1 to 9, wherein the inorganic compound is a hollow particle, the hollow glass bead, the glass bead block, or the hollow microbubble. The surface of the glass block is coated with a flame retardant.

  An auxiliary material for fire extinguishing according to the invention of claim 11 is the structure of claim 10, wherein the flame retardant is any one of magnesium hydroxide, calcium carbonate, and calcium hydroxide.

  A fire extinguishing method for a combustible liquid according to a twelfth aspect of the present invention is a fire extinguishing method at the time of occurrence of a fire of a combustible liquid, and the fire extinguishing auxiliary material according to any one of claims 1 to 11 is used. Before spraying the foam and / or powder fire extinguisher, or spraying the foam and / or powder fire extinguisher on the surface of the flammable liquid.

  Here, “injecting foam extinguishing agent and / or powder extinguishing agent” means to inject only foam extinguishing agent, to injecting only powder extinguishing agent, and to both foam extinguishing agent and powder extinguishing agent. It means to include all of the case of jetting.

  A fire extinguishing auxiliary material or a fire extinguishing method for a combustible liquid according to the invention of claim 13 is the construction of any one of claims 1 to 12, wherein the combustible liquid is a refined petroleum product.

  Here, “petroleum refined products” include naphtha, gasoline, kerosene, light oil, heavy oil, and the like.

  The auxiliary material for fire extinguishing according to the invention of claim 1 is an auxiliary material for extinguishing fire in the event of a fire of flammable liquid, and is a hollow particle of an inorganic compound and has a specific gravity within a range of 0.2 to 0.6 for a short time. The heat resistance is in the range of 1300 ° C to 1600 ° C, and before injecting the foam and / or powder extinguishing agent, or at the same time as injecting the foam and / or powder extinguishing agent, Spread on the surface to form a heat insulation layer and air barrier layer.

Here, examples of the “inorganic compound” include silica (SiO ₂ ), alumina (Al ₂ O ₃ ), glass, and the like.

  As described above, the auxiliary material for fire extinguishing according to the present invention has a specific gravity in the range of 0.2 to 0.6. Therefore, crude oil and petroleum refined products (naphtha) having a specific gravity in the range of 0.75 to 0.95. Float in gasoline, kerosene, light oil, etc. Of course, methanol (specific gravity 0.795), ethanol (specific gravity 0.789), diethyl ether (specific gravity 0.7), acetone (specific gravity 0.79), triethylamine (specific gravity 0. 72) and the like, and a heat insulating layer is formed on the surface of the flammable liquid.

  In the case of an oil fire, the oil level is about 800 ° C., but the flame reaches around 1300 ° C. However, the fire-extinguishing auxiliary material according to the present invention has a short-time heat resistance in the range of 1300 ° C. to 1600 ° C. Even if it is put into the flame, it does not melt, and the flame temperature is also lowered by the heat insulation effect when it is put one after another, so that the heat insulation layer formed on the surface of the flammable liquid is not destroyed.

  As described above, the foam extinguishing agent and / or at the time when the momentum of the fire is reduced by the heat insulating effect and the air blocking effect of the heat insulating layer formed by the inorganic compound hollow particles, or at the same time as the inorganic compound hollow particles are sprayed. By spraying a powder fire extinguisher, a more complete insulation layer / air barrier layer is formed, and the fire of the flammable liquid is completely extinguished. Here, the fire-extinguishing auxiliary material does not need to completely cover the surface of the combustible liquid, and by covering nearly 60%, the fire-extinguishing effect by injecting the foam fire-extinguishing agent and / or the powder fire-extinguishing agent is enhanced.

  In this way, even when a full-scale fire of flammable liquid occurs in an oil tank or tanker (oil transport ship) having a diameter of 80 to 90 m, it is ensured with a foam and / or powder fire extinguisher for a short time. It becomes an auxiliary material for fire extinguishing that can be extinguished with.

  In the fire-fighting auxiliary material according to the invention of claim 2, the hollow particles of the inorganic compound have oil resistance. Here, “oil resistance” means that it does not dissolve in flammable liquids such as petroleum refined products, does not erode, and does not penetrate into flammable liquids.

  As a result, it does not dissolve in water flammable liquids such as petroleum refined products (naphtha, gasoline, kerosene, light oil, etc.) and methanol, ethanol, diethyl ether, acetone, triethylamine, etc. A heat insulating layer and an air barrier layer are reliably formed on the surface of these flammable liquids.

  As described above, the foam is extinguished when the fire momentum is reduced by the heat insulating layer formed by the hollow particles of the oil-resistant inorganic compound and the air barrier layer, or at the same time as the hollow particles of the oil-resistant inorganic compound are sprayed. And / or by spraying a powder fire extinguisher, a more complete thermal barrier / air barrier layer is formed and the fire of the flammable liquid is completely extinguished. Here, the fire-extinguishing auxiliary material does not need to completely cover the surface of the combustible liquid, and by covering nearly 60%, the fire-extinguishing effect by injecting the foam fire-extinguishing agent and / or the powder fire-extinguishing agent is enhanced.

  In this way, even when a full-scale fire of flammable liquid occurs in an oil tank or tanker (oil transport ship) having a diameter of 80 to 90 m, it is ensured with a foam and / or powder fire extinguisher for a short time. It becomes an auxiliary material for fire extinguishing that can be extinguished with.

  The auxiliary material for fire extinguishing according to the invention of claim 3 is a glass bead in which the hollow particles of the inorganic compound are hollow. Therefore, since it is glass, it has oil resistance, and even when sprayed on the oil surface, it does not suck in oil, and reliably forms a heat insulating layer / air barrier layer on the surface of the flammable liquid. Moreover, since such hollow glass beads are also used for heat insulation in a blast furnace (about 1600 ° C.), it is considered that heat resistance is about 1600 ° C. for a short time. Therefore, even if thrown into the flame, it does not melt, and the flame temperature also decreases due to the heat insulation effect when thrown one after another, so the heat insulation layer / air barrier layer formed on the surface of the flammable liquid is destroyed. Never happen.

  In this way, even when a full-scale fire of flammable liquid occurs in a petroleum tank or tanker having a diameter of 80 to 90 m, it can be surely extinguished in a short time with a foam extinguisher and / or a powder extinguisher. Can be used as a fire extinguishing aid.

  An auxiliary material for extinguishing fire according to the invention of claim 4 is an auxiliary material for extinguishing fire in the event of a fire of a flammable liquid, wherein a plurality of hollow glass beads are fused or a plurality of hollow glass beads are inorganic A glass bead block formed by bonding with an adhesive and having a specific gravity in the range of 0.2 to 0.6, before spraying foam extinguishing agent and / or powder extinguishing agent, or foam extinguishing agent and / or powder Simultaneously with injecting the fire extinguishing agent, only the glass bead block is mixed with a plurality or a plurality of hollow glass beads and dispersed on the surface of the flammable liquid to form a heat insulating layer / air barrier layer.

  In this way, by forming a block with hollow glass beads, even if the hollow glass beads on the surface melt or crack at the high temperature of the flame when dropped into a flammable liquid causing a fire, the inside The hollow glass beads fall onto the surface of the flammable liquid while maintaining their shape. As described above, the specific gravity of the combustible liquid is in the range of 0.7 to 0.95, and the hollow glass bead block according to the present invention has the specific gravity in the range of 0.2 to 0.6. Therefore, it floats on the flammable liquid and forms a heat insulating layer / air barrier layer on the surface of the flammable liquid.

  The glass bead block according to the present invention is formed by fusing hollow glass beads or bonding hollow glass beads with an inorganic adhesive, so that the surface can be touched even when touching a high temperature combustible liquid. The hollow glass beads may melt or break, but the glass bead blocks will not break apart. It is more effective to mix and disperse single hollow glass beads in order to fill the gaps between the glass bead blocks.

  And since it is glass, it has oil resistance, and even when it is sprayed on the oil surface, it does not suck in oil, and a heat insulating layer / air barrier layer is reliably formed on the surface of the flammable liquid. Moreover, since such hollow glass beads are also used for heat insulation in a blast furnace (about 1600 ° C.), it is considered that heat resistance is about 1600 ° C. for a short time. Therefore, even if thrown into the flame, it does not melt, and the flame temperature also decreases due to the heat insulation effect when thrown one after another, so the heat insulation layer / air barrier layer formed on the surface of the flammable liquid is destroyed. Never happen.

  Thus, the effect of the heat insulating layer / air barrier layer formed on the surface of the flammable liquid can reduce the momentum of the fire, and after spraying the glass bead block according to the present invention, or the glass according to the present invention By spraying foam and / or powder fire extinguishing agent at the same time as the spraying of the bead block, a more complete heat insulating layer / air barrier layer is formed, and the fire of the flammable liquid is completely extinguished.

  In this way, even when a full-scale fire of flammable liquid occurs in a petroleum tank or tanker having a diameter of 80 to 90 m, it can be surely extinguished in a short time with a foam extinguisher and / or a powder extinguisher. Can be used as a fire extinguishing aid.

  A fire extinguishing auxiliary material according to the invention of claim 5 is a fire extinguishing auxiliary material at the time of fire of a flammable liquid, formed by adding a foaming agent using glass as a main raw material, and foaming inside during firing. Hollow fine-bubble glass block having a specific gravity in the range of 0.2 to 0.6, before or before spraying the foam and / or powder extinguisher, or the foam and / or powder extinguisher At the same time, a plurality of hollow glass beads or a plurality of hollow glass beads are mixed together and sprayed on the surface of the flammable liquid to form a heat insulating layer / air barrier layer.

  In this way, when a glass block having fine bubbles inside is dropped on a flammable liquid causing a fire, even if the surface of the hollow fine bubble glass block melts or breaks at the high temperature of the flame, it remains hollow. The glass having fine bubbles inside the fine bubble glass block falls to the surface of the flammable liquid while maintaining its shape. And as above-mentioned, since the specific gravity of a combustible liquid exists in the range of 0.7-0.95, and the specific gravity of the hollow microbubble glass block concerning this invention exists in the range of 0.2-0.6. It floats on the flammable liquid and forms a heat insulating layer / air barrier layer on the surface of the flammable liquid.

  In order to fill the gaps between the hollow microbubble glass blocks, it is more effective to mix and disperse the single hollow glass beads. Moreover, since it is glass, it has oil resistance, and even when sprayed on the oil surface, it does not suck in oil, and a heat insulating layer / air barrier layer is reliably formed on the surface of the flammable liquid.

  Thus, the effect of the heat insulating layer / air barrier layer formed on the surface of the flammable liquid can attenuate the momentum of the fire, and after spraying the hollow fine bubble glass block according to the present invention, or in the present invention By spraying such a hollow micro-bubble glass block and spraying foam extinguishing agent and / or powder extinguishing agent, a more complete heat insulation layer / air barrier layer is formed, and the fire of flammable liquid is completely Fire extinguishing.

  In this way, even when a full-scale fire of flammable liquid occurs in a petroleum tank or tanker having a diameter of 80 to 90 m, it can be surely extinguished in a short time with a foam extinguisher and / or a powder extinguisher. Can be used as a fire extinguishing aid.

  A fire extinguishing auxiliary material according to the invention of claim 6 is a glass bead block or hollow fine bubble glass formed by fusing a plurality of hollow glass beads or adhering a plurality of hollow glass beads with an inorganic adhesive. The block is 10 mm to 500 mm long, 10 mm to 500 mm wide, and 10 mm to 100 mm thick, more preferably 80 mm to 120 mm long, 80 mm to 120 mm wide, and 15 mm to 50 mm thick. That's it.

  A block made of a plurality of hollow glass beads or a hollow fine-bubble glass block is not very effective even if it is too small, and handling is inconvenient if it is too large. Therefore, by making the size of the block within the range of 10 mm to 500 mm in length, 10 mm to 500 mm in width, and 10 mm to 100 mm in thickness, the effect of making a plurality of hollow glass beads or hollow fine bubble glass blocks into blocks is sufficient. It is convenient for handling. Furthermore, by making the size of the block within the range of 80 mm to 120 mm in length, 80 mm to 120 mm in width, and 15 mm to 50 mm in thickness, the effect of making the block appears more remarkably and it becomes more convenient for handling. More preferable.

  Combustibility causing a fire by mixing a plurality of glass bead blocks or hollow fine-bubble glass blocks composed of a plurality of hollow glass beads of such a size, and in some cases a plurality of single hollow glass beads. By dropping one after another from above the liquid, it floats on the flammable liquid and forms a heat insulating layer / air barrier layer on the surface of the flammable liquid.

  The glass bead block according to the present invention is formed by fusing hollow glass beads or bonding hollow glass beads with an inorganic adhesive, so that the surface can be touched even when touching a high temperature combustible liquid. The hollow glass beads may melt or break, but the glass bead blocks will not break apart.

  By the effect of the heat insulating layer / air barrier layer formed on the surface of the flammable liquid in this way, the momentum of the fire can be attenuated, and after spraying the glass bead block or hollow fine bubble glass block according to the present invention, Alternatively, by spraying a foam fire extinguishing agent and / or a powder fire extinguishing agent at the same time as spraying the glass bead block or the hollow fine bubble glass block according to the present invention, a more complete heat insulating layer / air barrier layer is formed, Completely extinguish flammable liquid fires.

  In this way, even when a full-scale fire of flammable liquid occurs in a petroleum tank or tanker having a diameter of 80 to 90 m, it can be surely extinguished in a short time with a foam extinguisher and / or a powder extinguisher. Can be used as a fire extinguishing aid.

  The auxiliary material for fire extinguishing according to the invention of claim 7 is one in which hollow glass beads or hollow fine bubble glass blocks are produced from waste glass. Therefore, it can be manufactured and obtained at a lower price, and no huge cost is incurred even if it is sprayed in large quantities over the entire surface of an oil tank having a diameter of 80 m to 90 m.

  And since it is glass, even if it spreads on the oil surface, it does not inhale oil, and forms a heat insulation layer and an air barrier layer on the surface of the flammable liquid without fail. Moreover, since such hollow glass beads are also used for heat insulation in a blast furnace (about 1600 ° C.), it is considered that heat resistance is about 1600 ° C. for a short time. Therefore, even if thrown into the flame, it does not melt, and the flame temperature also decreases due to the heat insulation effect when thrown one after another, so the heat insulation layer / air barrier layer formed on the surface of the flammable liquid is destroyed. Never happen.

  Thus, the effect of the heat insulating layer / air barrier layer formed on the surface of the flammable liquid can reduce the momentum of the fire, and the hollow glass beads and / or glass bead blocks and / or hollows according to the present invention can be reduced. Foam and / or powder fire extinguisher is sprayed after spraying the fine bubble glass block or at the same time as spraying the hollow glass beads and / or glass bead block and / or hollow fine bubble glass block according to the present invention. By doing so, a more complete heat insulating layer / air barrier layer is formed, and the fire of the combustible liquid is completely extinguished.

  In this way, even when a full-scale fire of flammable liquid occurs in a petroleum tank or tanker having a diameter of 80 to 90 m, it can be surely extinguished in a short time with a foam extinguisher and / or a powder extinguisher. Can be a low-cost fire-fighting aid.

  The auxiliary material for fire extinguishing according to the invention of claim 8 has an outer diameter of the inorganic compound hollow particles or hollow glass beads in the range of about 1 mm to about 20 mm, more preferably in the range of about 4 mm to about 8 mm.

  Even if the hollow particle of the inorganic compound or the hollow glass bead is too small, it takes time to form the heat insulation layer / air blocking layer having the required thickness (about 50 mm), and the hollow particle of the inorganic compound Or, even if the outer diameter of the hollow glass beads is too large, the gap is too large and an effective heat insulating layer / air blocking layer cannot be obtained, so the outer diameter of the hollow particles of the inorganic compound is in the range of about 1 mm to about 20 mm. More preferably, it is within the range of about 4 mm to about 8 mm.

  Thus, the effect of the heat insulating layer / air barrier layer formed on the surface of the flammable liquid can attenuate the momentum of the fire, and the inorganic compound hollow particles, hollow glass beads and / or glass according to the present invention By spraying a foam fire extinguishing agent and / or a powder fire extinguishing agent after spraying the bead block or simultaneously with spraying the hollow particles, the hollow glass beads and / or the glass bead blocks of the inorganic compound according to the present invention, In addition, a complete insulation layer / air barrier layer is formed, and the fire of the flammable liquid is completely extinguished.

  In this way, even when a full-scale fire of flammable liquid occurs in a petroleum tank or tanker having a diameter of 80 to 90 m, it can be surely extinguished in a short time with a foam extinguisher and / or a powder extinguisher. Can be used as a fire extinguishing aid.

  The auxiliary material for fire extinguishing according to the invention of claim 9 has a thermal conductivity of hollow particles of inorganic compounds or hollow glass beads or hollow fine cell glass blocks of about 0.05 W / (m · K) to about 0.2 W / Within the range of (m · K), more preferably within the range of about 0.07 W / (m · K) to about 0.1 W / (m · K).

  The thermal conductivity of water is 0.5 W / (m · K), and the thermal conductivity of calcium sulfate (gypsum), which has a small thermal conductivity among solids, is 0.35 to 0.42 W / (m · K). The thermal conductivity of the refractory brick is 0.2 to 0.3 W / (m · K). On the other hand, the thermal conductivity of hollow glass beads having an outer diameter of 4 mmφ to 5 mmφ is as extremely low as 0.088 to 0.09 W / (m · K) and is excellent in heat insulation.

  Thus, the thermal conductivity is in the range of about 0.05 W / (m · K) to about 0.2 W / (m · K), more preferably about 0.07 W / (m · K) to about 0.00. A heat-insulating layer / air-blocking layer having excellent heat insulation properties by constituting a fire extinguishing auxiliary material with hollow particles, hollow glass beads, or hollow fine-bubble glass blocks of inorganic compounds in the range of 1 W / (m · K) Can be reduced more reliably and in a short time, and the hollow particles, hollow glass beads and / or glass bead blocks and / or hollow fine cell glass of the inorganic compound according to the present invention can be reduced. After spraying the block or simultaneously with spraying the hollow particles, hollow glass beads and / or glass bead blocks and / or hollow fine-bubble glass blocks of the inorganic compound according to the present invention , By injecting the foam and / or dry chemical, is more complete heat-insulating layer, the air blocking layer is formed, fire flammable liquids are completely extinguished.

  In this way, even when a full-scale fire of flammable liquid occurs in an oil tank or tanker having a diameter of 80 to 90 m, the fire extinguisher and / or the powder fire extinguisher are more reliably extinguished in a short time. It becomes an auxiliary material for fire fighting.

  The auxiliary material for fire extinguishing according to the invention of claim 10 is obtained by coating the surface of a hollow particle of an inorganic compound, a hollow glass bead, a glass bead block or a hollow fine bubble glass block with a flame retardant. Here, as the “flame retardant”, magnesium hydroxide, calcium carbonate, calcium hydroxide, or the like can be used.

  When such a flame retardant is exposed to a high-temperature flame, it releases water or carbon dioxide and changes to another compound, so that the cooling effect is obtained by the released water and the air is released by the released carbon dioxide. A blocking effect is obtained. Therefore, the heat insulating layer / air barrier layer formed on the surface of the flammable liquid by the hollow particles, the hollow glass beads and / or the glass bead blocks and / or the hollow fine bubble glass blocks constituting the auxiliary material for fire extinguishing according to the present invention. The effect of this is further enhanced by the released water or carbon dioxide gas, so the momentum of the fire can be attenuated in a shorter time, and after the fire-fighting auxiliary material according to the present invention is sprayed, or the fire-extinguishing according to the present invention By spraying foam extinguishing agent and / or powder extinguishing agent at the same time as spraying the auxiliary material, a more complete heat insulating layer / air barrier layer is formed, and the fire of the flammable liquid is completely extinguished.

  In this way, even when a full-scale fire of flammable liquid occurs in an oil tank or tanker having a diameter of 80 to 90 m, the fire extinguisher and / or the powder fire extinguisher are more reliably extinguished in a short time. It becomes an auxiliary material for fire fighting.

  In the fire-extinguishing auxiliary material according to the invention of claim 11, the flame retardant is any of magnesium hydroxide, calcium carbonate, and calcium hydroxide. When magnesium hydroxide and calcium hydroxide are exposed to high temperatures, water is released to become magnesium oxide and calcium oxide, so that the released water provides a cooling effect, and when calcium carbonate is exposed to high temperatures, Since the gas is released into calcium oxide, the released carbon dioxide gas provides an air blocking effect. Further, since these magnesium hydroxide, calcium carbonate, and calcium hydroxide are all inexpensive inorganic compounds, they are inexpensive and include hollow particles of inorganic compounds, hollow glass beads, glass bead blocks, or hollow microbubble glass blocks. The surface can be coated.

  Therefore, the effect of the heat insulating layer / air blocking layer formed on the surface of the flammable liquid by the hollow particles, the hollow glass beads or the glass bead block or the hollow fine bubble glass block constituting the auxiliary material for fire extinguishing according to the present invention, Since it is further enhanced by the released water or carbon dioxide gas, the momentum of the fire can be attenuated in a shorter time, and after the fire-fighting auxiliary material according to the present invention is sprayed or the fire-fighting auxiliary material according to the present invention is added. At the same time as spraying, a foam and / or powder fire extinguisher is sprayed to form a more complete thermal barrier / air barrier, and the flammable liquid fire is completely extinguished.

  In this way, even when a full fire of flammable liquid occurs in an oil tank or tanker having a diameter of 80 to 90 m, a foam fire extinguisher and / or a powder fire extinguisher more reliably in a short time and at a low cost. It becomes a fire extinguishing auxiliary material that can be extinguished by.

  A fire extinguishing method for a combustible liquid according to the invention of claim 12 is a fire extinguishing method at the time of occurrence of a fire of the combustible liquid, and the fire extinguishing auxiliary material according to any one of claims 1 to 11, Before injecting the foam and / or powder extinguisher, or spraying the foam and / or powder extinguisher on the surface of the flammable liquid.

  As described above, the specific gravity of the flammable liquid is in the range of 0.7 to 0.95, and the auxiliary material for fire extinguishing according to claims 1 to 11 has the specific gravity in the range of 0.2 to 0.6. Therefore, it floats on the flammable liquid and forms a heat insulating layer / air barrier layer on the surface of the flammable liquid.

  Thus, the fire extinguishing according to claims 1 to 11 is performed when the momentum of the fire is reduced by the heat insulating effect and the air blocking effect of the heat insulating layer formed by the fire extinguishing auxiliary material according to claims 1 to 11. At the same time when the auxiliary material is added, a foam and / or powder fire extinguishing agent is sprayed to form a more complete heat insulating layer / air barrier layer, and the fire of the flammable liquid is completely extinguished. Here, the fire-extinguishing auxiliary material does not need to completely cover the surface of the combustible liquid, and by covering nearly 60%, the fire-extinguishing effect by injecting the foam fire-extinguishing agent and / or the powder fire-extinguishing agent is enhanced.

  In this way, even when a full-scale fire of flammable liquid occurs in a petroleum tank or tanker having a diameter of 80 to 90 m, it can be surely extinguished in a short time with a foam extinguisher and / or a powder extinguisher. It becomes a fire extinguishing method for flammable liquids.

  In the fire extinguishing auxiliary material or the method for extinguishing a flammable liquid according to the invention of claim 13, the flammable liquid is a petroleum refined product. “Petroleum refined products” include naphtha, gasoline, kerosene, light oil, heavy oil, etc., but since these have specific gravity in the range of 0.75 to 0.95, specific gravity is 0.2 to 0.00. The fire extinguishing auxiliary material according to the present invention within the range of 6 floats on these petroleum refined products, and forms a heat insulating layer / air barrier layer on the surface of the petroleum refined product.

  In the fire of petroleum refined products, the oil level is about 800 ° C. and the flame reaches around 1300 ° C., but the fire-fighting auxiliary material according to the present invention has a short-time heat resistance within the range of 1300 ° C. to 1600 ° C. Therefore, even if it is put into the flame, it does not melt, and the flame temperature also decreases due to the heat insulation effect when it is put in one after another, so the heat insulation layer / air barrier layer formed on the surface of the refined petroleum product It will not be destroyed.

  Thus, when the fire momentum has declined due to the heat insulating effect and air blocking effect of the heat insulating layer formed by the fire extinguishing auxiliary material according to the present invention, or at the same time when the fire extinguishing auxiliary material according to the present invention is charged, By spraying foam and / or powder fire extinguishing agents, a more complete thermal insulation / air barrier layer is formed, and the fire of petroleum refined products is completely extinguished. Here, it is not necessary for the fire-extinguishing auxiliary material to completely cover the surface of the refined petroleum product, and by covering nearly 60%, the fire-extinguishing effect by injecting the foam fire-extinguishing agent and / or the powder fire-extinguishing agent is enhanced.

  In this way, even when an oil tank or tanker (oil transport ship) with a diameter of 80m to 90m has a full fire of a refined petroleum product, it is surely a short time with a foam and / or powder fire extinguisher. It becomes a fire extinguishing auxiliary material that can be extinguished or a fire extinguishing method for a flammable liquid.

  Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1
First, Embodiment 1 of the present invention will be described with reference to FIG. Fig.1 (a) is a figure which shows the external appearance of the auxiliary material for fire extinguishing concerning Embodiment 1 of this invention, (b) is sectional drawing.

  As shown in FIGS. 1A and 1B, the fire extinguishing auxiliary material 1 according to the first embodiment has an outer diameter R = about 4 mm to about 8 mm and a wall thickness t = about 0.5 mm to about 2 mm. Hollow glass beads made of waste glass.

  This hollow glass bead 1 can be manufactured as follows. First, waste glass is pulverized into fine particles of about 40 μm. Next, 2 wt% to 3 wt% of an aluminum silicate compound is added as a foaming agent because carbon dioxide gas is generated at 750 ° C. to 800 ° C. during heating described later. In addition to the aluminum silicate compound, calcium carbonate, magnesium carbonate, dolomite, and the like can be used as the foaming agent. Furthermore, 5 wt% to 10 wt% of sodium silicate or the like is added as an adhesive, granulated and dried, and then heated and baked in a rotary kiln at 850 ° C for 10 minutes to 15 minutes for foaming.

  The hollow glass bead 1 is manufactured by the above process. Therefore, the composition of the hollow glass beads 1 is as shown in Table 1.

  As shown in Table 1, since this hollow glass bead 1 is carbonless, it can be used for heat insulation of a blast furnace (about 1600 ° C.), so it is considered that the heat resistance for a short time is about 1600 ° C. . Therefore, it does not melt even if it is put into the flame of oil fire (about 1300 ° C), but it is formed on the surface of the flammable liquid such as oil because the temperature of the flame is lowered by the heat insulation effect by putting it one after another. The heat insulation layer / air barrier layer thus formed is not destroyed. Moreover, since it is carbonless, the fire-extinguishing effect is further enhanced.

  Table 2 shows the results of measurement of the thermal conductivity of the hollow glass beads 1 and comparison with other main substances.

  As shown in Table 2, the thermal conductivity of the hollow glass beads 1 is about 0.09 W / (m · K), which is not only smaller than refractory bricks than water but also smaller than any substance other than air. . From this, it is thought that the hollow glass bead 1 shows the outstanding heat insulation.

  Actually, in order to confirm the heat insulating effect and air blocking effect of the hollow glass beads 1, a fire extinguishing experiment was conducted. When a square metal bat with a side length of about 1 m is filled with kerosene and ignited and the flame turns around, the hollow glass beads 1 are introduced one after another. About 70% of the surface of the metal bat However, the momentum of the flame weakened rapidly when it was covered with the glass beads 1, and when a foam extinguisher was sprayed with a commercially available foam extinguisher, it was possible to extinguish immediately.

  At this time, as a method of successively introducing the hollow glass beads 1, the hollow glass beads 1 are pumped with air through a non-combustible pipe. As a result, the hollow glass beads 1 can be introduced one after another without the operator approaching a high-temperature flame. In addition, as pressurized gas which pumps the hollow glass bead 1 in a nonflammable pipe, inert gas, such as nitrogen, a carbon dioxide, argon, other than air can also be used, and this has the effect of fire extinguishing more. improves.

  Thus, the hollow glass beads 1 made of waste glass having a diameter of about 4 mm to about 8 mm as the auxiliary material for fire extinguishing according to the first embodiment have an oil level in the fire of kerosene as an oil refined product. Although it is about 800 ° C and the flame reaches around 1300 ° C, the heat resistance for a short time is about 1600 ° C. When the heat insulation layer and air barrier layer formed on the surface of kerosene are not destroyed and the momentum of the fire has declined, a complete heat insulation layer and air barrier layer are formed by spraying foam extinguishing agent, and kerosene The fire can be completely extinguished.

Embodiment 2
Next, Embodiment 2 of the present invention will be described with reference to FIG. FIG. 2 is a perspective view showing an appearance of the fire-fighting auxiliary material according to the second embodiment.

  As shown in FIG. 2, the auxiliary material for fire extinguishing 2 according to the second embodiment has a length of about 100 mm and a width of about 100 mm, which is formed by fusing hollow glass beads 1 made of waste glass having a diameter of about 4 mm. It is a glass bead block of 100 mm and a thickness of about 15 mm, and its specific gravity is about 0.4.

  By dropping a plurality of glass bead blocks 2 composed of a plurality of hollow glass beads 1 of such size one after another from above the flammable liquid causing a fire, the surface floats on the flammable liquid. An insulating layer and an air barrier layer are formed on the substrate.

  Since the glass bead block 2 according to the second embodiment is formed by fusing the hollow glass beads 1, the hollow glass beads 1 on the surface can be melted even when touched by a high temperature combustible liquid. Although there is a possibility of breaking, the glass bead block 2 is not broken apart.

  In this way, the effect of the heat insulating layer / air barrier layer formed on the surface of the flammable liquid can reduce the momentum of the fire, and by spraying the foam extinguishing agent and / or the powder extinguishing agent, it is more complete Insulation layer and air barrier layer are formed, and the fire of flammable liquid is completely extinguished.

  Actually, in order to confirm the heat insulation effect and air blocking effect of the glass bead block 2 as the fire extinguishing auxiliary material according to the second embodiment, a fire extinguishing experiment was performed in the same manner as in the first embodiment. That is, when a square metal bat having a side length of about 1 m is filled with kerosene and ignited and the flame turns around, the glass bead blocks 2 are successively introduced. % Of the flame quickly weakened when the glass was covered with the glass bead block 2, and when a foam extinguisher was sprayed with a commercially available foam extinguisher, it was possible to extinguish immediately.

  In this way, the glass bead block 2 as the fire extinguishing auxiliary material according to the second embodiment has an oil level of about 800 ° C. and a flame of around 1300 ° C. in a kerosene fire as a refined petroleum product. The short-time heat resistance is about 1600 ° C. and the hollow glass beads 1 on the surface may be melted or cracked, but the hollow glass beads 1 inside are not melted or cracked one after another. The heat insulation layer and air barrier layer formed on the surface of kerosene are not destroyed by throwing in the flame, and when the momentum of the fire has declined, a foam insulation is injected to inject a complete heat insulation layer・ An air barrier layer is formed, and the kerosene fire can be completely extinguished.

  In this Embodiment 2, although the example which formed the glass bead block by fusing the hollow glass bead 1 was demonstrated, the glass bead block was attached by adhere | attaching the hollow glass bead 1 with an inorganic type adhesive agent. It may be formed.

Embodiment 3
Next, Embodiment 3 of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view showing the structure of the fire-fighting auxiliary material according to the third embodiment.

  As shown in FIG. 3, the auxiliary material 3 for fire extinguishing according to the third embodiment has a surface of hollow glass beads 1 made of waste glass having a diameter of about 4 mm to about 8 mm, and magnesium hydroxide as a flame retardant. 4 is coated. Thus, by covering the surface of the hollow glass bead 1 with magnesium hydroxide 4, when the fire-extinguishing auxiliary material 3 according to the third embodiment is put into a combustible liquid causing a fire, hydroxylation is performed. When magnesium 4 is exposed to a high temperature, water is released to become magnesium oxide, so that a cooling effect is obtained by the released water.

  Therefore, the effect of the heat insulating layer / air barrier layer formed on the surface of the flammable liquid by the hollow glass beads 1 constituting the fire extinguishing auxiliary material 3 according to the third embodiment is further enhanced by the released water. Therefore, the momentum of the fire can be attenuated in a shorter time.

  Actually, in order to confirm the heat insulating effect and the air blocking effect of the fire extinguishing auxiliary material 3 according to the third embodiment, a fire extinguishing experiment was performed in the same manner as in the first and second embodiments. That is, when a square metal bat having a side length of about 1 m is filled with kerosene and ignited and the flame turns around, the fire-extinguishing auxiliary material 3 is introduced one after another, about the surface of the metal bat. When 60% of the glass beads 1 covered the flame, the momentum of the flame weakened rapidly. When a foam extinguisher was sprayed with a commercially available foam extinguisher, it was possible to extinguish immediately. Thus, it turned out that it can extinguish in a short time compared with the case where the auxiliary material 1 for fire extinguishing concerning Embodiment 1 is used by using the auxiliary material 3 for extinguishing fire concerning this Embodiment 3. FIG.

  At this time, as a method of successively putting in the extinguishing auxiliary material 3 in which the surface of the hollow glass bead 1 is coated with magnesium hydroxide 4, the extinguishing auxiliary material 3 is pumped with air in a non-combustible pipe. ing. As a result, the fire extinguishing auxiliary material 3 can be introduced one after another without the operator approaching a high-temperature flame. In addition, as the pressurized gas for pumping the fire extinguishing auxiliary material 3 through the incombustible pipe, in addition to air, an inert gas such as nitrogen, carbon dioxide, and argon can be used, thereby further enhancing the fire extinguishing effect. improves.

  Thus, since the fire-extinguishing auxiliary material 3 according to the third embodiment is formed by coating the surface of the hollow glass bead 1 with magnesium hydroxide 4 as a flame retardant, the magnesium hydroxide 4 is When exposed to a high temperature, water is released into magnesium oxide, and since the cooling effect is obtained by the released water, the hollow glass beads 1 constituting the fire extinguishing auxiliary material 3 make kerosene as a flammable liquid. The effect of the heat insulating layer and air barrier layer formed on the surface is further enhanced by the water released, and the fire momentum can be reduced in a shorter time, and the fire extinguisher can be extinguished reliably and in a short time. can do.

Embodiment 4
Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view showing the configuration of the fire-fighting auxiliary material according to the fourth embodiment.

  As shown in FIG. 4, the fire extinguishing auxiliary material 5 according to the fourth embodiment has a length of about 100 mm and a width of about 100 mm, which is formed by fusing hollow glass beads 1 made of waste glass having a diameter of about 4 mm. The surface of the glass bead block 2 having a thickness of about 100 mm and a thickness of about 15 mm is coated with magnesium hydroxide 4 as a flame retardant, and the specific gravity is about 0.4. Thus, by covering the surface of the glass bead block 2 made of the hollow glass beads 1 with the magnesium hydroxide 4, the fire extinguishing auxiliary material 5 according to the fourth embodiment is in the flammable liquid causing the fire. When the magnesium hydroxide 4 is put in, magnesium hydroxide 4 is exposed to a high temperature to release water and become magnesium oxide, so that the cooling effect is obtained by the released water.

  Therefore, the effect of the heat insulating layer / air barrier layer formed on the surface of the flammable liquid by the glass bead block 2 constituting the fire extinguishing auxiliary material 5 according to the fourth embodiment is further enhanced by the released water. , Can reduce the momentum of the fire in a shorter time.

  A plurality of auxiliary fire extinguishing materials 5 formed by coating the glass bead block 2 with magnesium hydroxide 4 and the surface of the hollow glass beads 1 according to the third embodiment are coated with magnesium hydroxide 4 as a flame retardant. The fire extinguishing auxiliary material 3 is also mixed and dropped one after another from above the flammable liquid causing the fire, so that these fire extinguishing auxiliary materials 3 and 5 float on the flammable liquid, and the flammable liquid A heat insulating layer / air barrier layer is formed on the surface of the substrate.

  And since the glass bead block 2 which comprises the auxiliary material 5 for fire extinguishing concerning this Embodiment 4 is formed by fusing the hollow glass bead 1, even if it touches a high temperature combustible liquid, surface The hollow glass beads 1 may melt or break, but the glass bead block 2 is not broken apart.

  In this way, the effect of the heat insulating layer / air barrier layer formed on the surface of the flammable liquid and the effect of cooling the water released from the magnesium hydroxide 4 can reduce the momentum of the fire. And / or by spraying a powder fire extinguisher, a more complete thermal barrier / air barrier layer is formed and the fire of the flammable liquid is completely extinguished.

  Actually, in order to confirm the heat insulation effect and the air blocking effect of the fire extinguishing auxiliary material 5 according to the fourth embodiment, a fire extinguishing experiment was performed in the same manner as in the first, second, and third embodiments. That is, when a square metal bat having a side length of about 1 m is filled with kerosene and ignited and the flame turns around, the fire-extinguishing auxiliary material 5 is introduced one after another, about the surface of the metal bat. When 60% was covered with the fire extinguishing auxiliary material 5, the momentum of the flame rapidly decreased, and when a foam fire extinguisher was sprayed with a commercially available foam fire extinguisher, the fire could be extinguished immediately.

  In this manner, the fire extinguishing auxiliary material 5 according to the fourth embodiment has an oil level of about 800 ° C. and a flame of around 1300 ° C. in a fire of kerosene as a petroleum refined product, but has a short time heat resistance. Is about 1600 ° C., and the hollow glass beads 1 on the surface may melt or crack, but the hollow glass beads 1 on the inside do not melt or crack, The heat insulation layer and air barrier layer formed on the surface of kerosene are not destroyed due to a drop in the temperature of the flame, and when the momentum of the fire has diminished, a complete heat insulation layer and air barrier layer can be obtained by injecting a foam extinguisher. Once formed, the kerosene fire can be completely extinguished.

  In the fourth embodiment, the example in which the glass bead block 2 is formed by fusing the hollow glass beads 1 has been described. However, the glass bead block can be formed by bonding the hollow glass beads 1 with an inorganic adhesive. 2 may be formed.

Embodiment 5
Next, a fifth embodiment of the present invention will be described. The auxiliary material for fire extinguishing according to the fifth embodiment is a hollow fine bubble glass block having a length of about 100 mm, a width of about 100 mm, and a thickness of about 15 mm.

  This hollow microbubble glass block can be manufactured as follows. First, waste glass is pulverized into fine particles of about 40 μm, and an aluminum silicate compound is added in an amount of 2 to 3% by weight as a foaming agent. This generates carbon dioxide at 750 to 800 ° C. during heating, which will be described later. Because. In addition to the aluminum silicate compound, calcium carbonate, magnesium carbonate, dolomite, and the like can be used as the foaming agent. Further, 5 wt% to 10 wt% of sodium silicate or the like is added as a pressure-sensitive adhesive, molded into a block shape, dried, and then heated and fired at 850 ° C for 10 minutes to 15 minutes in a rotary kiln for foaming.

  Since the hollow fine bubble glass block produced in this way has a small specific gravity of 0.2 to 0.4, a plurality of such hollow fine bubble glass blocks having a length of about 100 mm, a width of about 100 mm, and a thickness of about 15 mm, By dropping one after another from the flammable liquid causing the fire, it floats on the flammable liquid and forms a heat insulating layer / air barrier layer on the surface of the flammable liquid.

  And even if the hollow fine bubble glass block concerning this Embodiment 5 touches a high temperature combustible liquid, the surface of a hollow fine bubble glass block may melt | dissolve or crack, The whole will not break apart. In this way, the effect of the heat insulating layer / air barrier layer formed on the surface of the flammable liquid can reduce the momentum of the fire, and by spraying the foam extinguishing agent and / or the powder extinguishing agent, it is more complete Insulation layer and air barrier layer are formed, and the fire of flammable liquid is completely extinguished.

  Actually, in order to confirm the heat insulating effect and the air blocking effect of the hollow fine bubble glass block as the fire extinguishing auxiliary material according to the fifth embodiment, a fire extinguishing experiment was performed in the same manner as in the first to fourth embodiments. That is, when a square metal bat with a side of about 1 m is filled with kerosene and ignited and the flame turns around, the hollow microbubble glass blocks are introduced one after another. When 70% of the glass was covered with a hollow fine-bubble glass block, the momentum of the flame rapidly decreased, and when a foam fire extinguisher was sprayed with a commercially available foam fire extinguisher, the fire could be extinguished immediately.

  In this way, the hollow fine bubble glass block as a fire extinguishing auxiliary material according to the fifth embodiment has an oil level of about 800 ° C. and a flame of about 1300 ° C. in the fire of kerosene as a refined petroleum product. However, the surface of the hollow microbubble glass block may melt or crack, but the inside of the hollow microbubble glass block does not melt or crack, and the temperature of the flame decreases as it is thrown in one after another When the heat insulation layer and air barrier layer formed on the surface of kerosene are not destroyed and the momentum of the fire has declined, a complete heat insulation layer and air barrier layer are formed by spraying foam extinguishing agent, and kerosene The fire can be completely extinguished.

  In addition, in the hollow fine bubble glass block as an auxiliary material for fire extinguishing according to the fifth embodiment, the surface is covered with magnesium hydroxide 4 as a flame retardant, as in the third and fourth embodiments, so that The effect of a heat insulation layer and an air barrier layer can be improved.

  In the said Embodiment 3, 4, although the case where the magnesium hydroxide 4 was used as a flame retardant was demonstrated, as a flame retardant, it is not restricted to magnesium hydroxide 4, It is not limited to calcium carbonate and calcium hydroxide. Various flame retardants can be used. Further, since these magnesium hydroxide, calcium carbonate, and calcium hydroxide are all inexpensive inorganic compounds, they cover the surfaces of the hollow glass beads 1 and the glass bead block 2 or the hollow fine-bubble glass block at a low cost. be able to.

In each of the above-described embodiments, only the case where hollow particles (hollow glass beads) made of glass are used as the hollow particles of the inorganic compound has been described. However, as the hollow particles of the inorganic compound, silica (SiO ₂₎ is also used. ), Alumina (Al ₂ O ₃ ), and other ceramic hollow particles, and various inorganic compound hollow particles can be used. In particular, when ceramic hollow particles such as silica (SiO ₂ ) and alumina (Al ₂ O ₃ ) are used, there is an advantage that they are less likely to break than glass against impact and thermal strain.

  In each of the above embodiments, hollow particles (hollow glass beads) or hollow fine-bubble glass blocks made of waste glass are used to reduce costs, but the hollows made of waste glass are not necessarily used. The glass beads or the hollow fine bubble glass block may not be used.

  Further, in each of the above embodiments, only the example of completely extinguishing with a foam extinguishing agent after the addition of the fire extinguishing auxiliary material has been described, but even if a powder extinguisher is used, it can be extinguished completely in the same manner. .

  In practicing the present invention, the configuration, components, material, size, shape, quantity, manufacturing method, and the like of other parts of the fire extinguishing auxiliary material are not limited to the above embodiments.

Fig.1 (a) is a figure which shows the external appearance of the auxiliary material for fire extinguishing concerning Embodiment 1 of this invention, (b) is sectional drawing. FIG. 2 is a perspective view showing an appearance of the fire-fighting auxiliary material according to the second embodiment. FIG. 3 is a cross-sectional view showing the structure of the fire-fighting auxiliary material according to the third embodiment. FIG. 4 is a cross-sectional view showing the configuration of the fire-fighting auxiliary material according to the fourth embodiment.

Explanation of symbols

1 Fire-fighting auxiliary materials (hollow glass beads)
2 Fire-fighting auxiliary materials (glass bead blocks)
3,5 Auxiliary material for fire fighting 4 Flame retardant

Claims (13)

An auxiliary material for extinguishing fire in the event of a flammable liquid fire,
It is a hollow particle of an inorganic compound, has a specific gravity in the range of 0.2 to 0.6, has a short-time heat resistance in the range of 1300 ° C to 1600 ° C, and before jetting the foam extinguishing agent and / or powder extinguishing agent Or a foam fire extinguishing agent and / or a powder fire extinguishing agent, and simultaneously spraying the surface of the combustible liquid to form a heat insulating layer / air barrier layer.   The fire extinguishing auxiliary material according to claim 1, wherein the hollow particles of the inorganic compound have oil resistance.   The fire extinguishing auxiliary material according to claim 1 or 2, wherein the hollow particles of the inorganic compound are hollow glass beads. An auxiliary material for extinguishing fire in the event of a flammable liquid fire,
The specific gravity is in the range of 0.2 to 0.6 in a glass bead block formed by fusing a plurality of hollow glass beads or adhering a plurality of hollow glass beads with an inorganic adhesive,
Before injecting foam extinguishant and / or powder extinguisher, or at the same time as injecting foam extinguishant and / or powder extinguisher, mix only a plurality of glass bead blocks or a plurality of hollow glass beads Then, an auxiliary material for fire extinguishing is characterized in that a heat insulating layer / air barrier layer is formed by spraying on the surface of the flammable liquid. An auxiliary material for extinguishing fire in the event of a flammable liquid fire,
A hollow fine-bubble glass block formed by adding a foaming agent with glass as a main raw material and foaming inside during firing,
The specific gravity is in the range of 0.2 to 0.6,
Before injecting the foam and / or powder extinguisher, or at the same time as injecting the foam and / or powder extinguisher, only the hollow fine-bubble glass block is made into a plurality or a plurality of hollow glass beads. An auxiliary material for fire extinguishing, which is mixed and sprayed on the surface of the flammable liquid to form a heat insulating layer and an air barrier layer.   The glass bead block formed by fusing the plurality of hollow glass beads or bonding the plurality of hollow glass beads with an inorganic adhesive or the hollow microbubble glass block has a length of 10 mm to 500 mm, a width The auxiliary material for fire extinguishing according to claim 4 or 5, which has a size of 10 mm to 500 mm and a thickness of 10 mm to 100 mm.   The fire-fighting auxiliary material according to any one of claims 3 to 6, wherein the hollow glass beads or the hollow fine-bubble glass block is manufactured from waste glass.   The fire extinguishing aid according to any one of claims 1 to 7, wherein an outer diameter of the hollow particle of the inorganic compound or the hollow glass bead is within a range of about 1 mm to about 20 mm. Wood.   The thermal conductivity of the hollow particles of the inorganic compound or the hollow glass beads or the hollow microbubble glass block is within a range of about 0.05 W / (m · K) to about 0.2 W / (m · K). The fire-fighting auxiliary material according to claim 1, wherein the fire-fighting auxiliary material is provided.   The surface of the hollow particle of the said inorganic compound, the said hollow glass bead, the said glass bead block, or the said hollow fine bubble glass block was coat | covered with the flame retardant, The one of Claim 1 thru | or 9 characterized by the above-mentioned. The auxiliary material for fire extinguishing described.   The fire-extinguishing auxiliary material according to claim 10, wherein the flame retardant is any one of magnesium hydroxide, calcium carbonate, and calcium hydroxide. A fire extinguishing method in the event of a fire of flammable liquid,
The fire-extinguishing auxiliary material according to any one of claims 1 to 11 is jetted before foaming and / or powder extinguishing agent is jetted, or foam extinguishing agent and / or powder extinguishing agent is jetted. At the same time, a method for extinguishing a flammable liquid, characterized in that the flammable liquid is sprayed on the surface. The fire-extinguishing auxiliary material according to any one of claims 1 to 11 or the fire-extinguishing method for a combustible liquid according to claim 12, wherein the combustible liquid is a refined petroleum product.

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