Fire extinguishing system and method suitable for storage tank

Abstract

The invention relates to the technical field of petrochemical engineering, in particular to a fire extinguishing system and method suitable for a storage tank, the system comprises the storage tank, a foam generator, a foam liquid supply device and a liquid CO2 supply device, a tank top is arranged at the top of the storage tank, and the tank top and the storage tank are connected through a supporting structure; a fire fighting pipeline and a temperature measuring device are arranged below the tank top, a sealing object is arranged at the output end of the fire fighting pipeline, the input end of the fire fighting pipeline is connected with the output end of the foam generator, and the input end of the foam generator is connected with the output end of the foam liquid supply device and the output end of the liquid CO2 supply device. According to the system, the foam liquid supply device, the liquid CO2 supply device and the foam generator are arranged, in the actual application process, CO2 can conduct atomization foaming on foam liquid in the foam generator, and therefore formed fire-fighting foam can rapidly conduct fire extinguishing on the interior of the storage tank through a fire-fighting pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of petrochemical industry, and in particular to a fire fighting system and method suitable for storage tanks. Background Art

[0002] At present, floating roof tanks and dome roof tanks in the petroleum and petrochemical industries often use steel structure tank roofs. However, due to the influence of stored materials and the environment, the steel roof is severely corroded, has a short design life, high subsequent maintenance costs, and is prone to steel roof collapse accidents during inspection and maintenance.

[0003] In addition, there are also tank tops with aluminum structures in the prior art. For example, Patent Publication No.: CN2640975Y discloses an assembled aluminum lattice shell top, which is assembled from a node ring and a node plate with a simple structure and an I-shaped aluminum rod to form a spatial spherical shape composed of multiple connecting rods and multiple nodes. The nodes and connecting rods are connected to each other to form multiple triangles, each triangle is covered with a triangular aluminum skin plate, and the tank top and the tank wall are connected by a sliding support. The assembled aluminum lattice shell top is made of aluminum alloy material, which is convenient for on-site construction, has good corrosion resistance, is durable, and can effectively extend the service life. However, since the melting point of aluminum is between 580 and 740°C, and once the oil medium in the storage tank burns, the temperature is about 1093°C, when a fire occurs in the storage tank, the supporting structure between the aluminum lattice shell top and the storage tank, such as the support beam, will be melted, so that the aluminum lattice shell top faces the risk of collapse, and if the aluminum lattice shell top falls onto the floating plate, there is also a risk of the fire accident expanding.

[0004] Therefore, there is an urgent need for a fire fighting system and method suitable for storage tanks, which can quickly extinguish the fire in the storage tank while ensuring that the aluminum support structure will not be melted in the early stage of the fire when a fire occurs. Summary of the invention

[0005] The present invention aims to solve the problem that there is a lack of an efficient fire-fighting system for storage tanks in the prior art, especially when the tank top of the storage tank is an aluminum structure, there is a lack of an efficient fire-fighting system that can ensure that the tank top does not collapse and can effectively extinguish the fire. A fire-fighting system and method suitable for storage tanks are provided.

[0006] In order to achieve the above-mentioned object, the present invention provides a fire fighting system suitable for a storage tank in a first aspect, the system comprising a storage tank, a foam generator, a foam liquid supply device and a liquid CO2 supply device;

[0007] A tank top is arranged on the top of the storage tank, and the tank top is connected to the storage tank through a supporting structure. A fire-fighting pipeline and a temperature measuring device are arranged below the tank top. A seal is arranged at the output end of the fire-fighting pipeline, and the input end is connected to the output end of the foam generator. The input end of the foam generator is respectively connected to the output ends of the foam liquid supply equipment and the liquid CO2 supply equipment.

[0008] Preferably, the foam generator comprises a cavity;

[0009] A corrugated plate is arranged inside the cavity, and the top of the cavity is connected to the input end of the fire-fighting pipeline.

[0010] Preferably, the foam liquid supply device is connected to the cavity through a foam liquid pipeline, the cavity end of the foam liquid pipeline extends to the interior of the cavity, and an atomizing nozzle is provided at the port, and the atomizing nozzle is located above the corrugated plate.

[0011] Preferably, the liquid CO2 supply device is connected to the cavity through a liquid CO2 pipeline, the cavity end of the liquid CO2 pipeline extends to the interior of the cavity, and a plurality of injection heads are symmetrically arranged on both sides of the port, and the injection heads are located below the corrugated plate.

[0012] Preferably, both the foam liquid pipeline and the liquid CO2 pipeline are provided with a one-way valve.

[0013] Preferably, the output end of the fire-fighting pipeline is arranged facing the bottom of the storage tank, and the sealant is lead.

[0014] Preferably, the temperature measuring device is a temperature-sensitive optical fiber.

[0015] Preferably, the tank top is made of aluminum.

[0016] Preferably, the surface of the support mechanism is coated with an epoxy primer layer and a flame retardant antistatic coating in sequence from the inside to the outside.

[0017] Preferably, the thickness of the epoxy primer layer is 10 to 90 μm, and the thickness of the flame retardant antistatic coating is 0.5 to 2.5 mm.

[0018] Preferably, the flame retardant antistatic coating is a polyurea coating, and the polyurea coating contains graphene and ceramic microbeads.

[0019] Preferably, the impurity content in the graphene is 0-6%, and the ceramic microbeads contain TiO2, SiO2 and Al2O2.

[0020] A second aspect of the present invention provides a fire fighting method applicable to a storage tank, which is implemented using the fire fighting system applicable to a storage tank, and the method comprises:

[0021] sequentially coating an epoxy primer layer and a flame retardant antistatic coating on the surface of the supporting mechanism;

[0022] When a fire occurs, the sealant at the output end of the fire-fighting pipeline is melted under the action of high temperature, and the temperature measuring device detects the temperature inside the storage tank in real time. When the detected temperature value exceeds the set value, the foam liquid supply equipment is used to transport the foam liquid to the foam generator, and the liquid CO2 supply equipment is used to transport liquid CO2 to the foam generator. Then the foam generator transports the fire-fighting foam to the interior of the storage tank through the fire-fighting pipeline for fire extinguishing.

[0023] According to the above technical scheme, based on the fire fighting system and method suitable for storage tanks, in actual application, when a fire occurs, the sealant at the output end of the fire fighting pipeline will be quickly melted, making the fire fighting pipeline conductive. At the same time, the temperature measuring device detects the temperature inside the storage tank in real time, and when the detected temperature value exceeds the set value, the foam liquid supply equipment is used to transport the foam liquid to the foam generator, and the liquid CO2 supply equipment is used to transport liquid CO2 to the foam generator. Then, the foam generator transports the fire fighting foam to the storage tank through the fire fighting pipeline for rapid fire extinguishing. It has the advantages of simple operation, easy use, high fire extinguishing efficiency and good effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the fire protection system applicable to the storage tank;

[0025] Figure 2 It is a schematic diagram of the structure of a foam generator for a fire protection system applicable to a storage tank;

[0026] Figure 3 It is a layout diagram of a fire protection pipeline of a fire protection system applicable to a storage tank in a specific implementation mode;

[0027] Figure 4 It is a structural schematic diagram of a support structure of a fire protection system suitable for a storage tank in a specific implementation manner.

[0028] Description of Reference Numerals

[0029] Storage tank 1; tank top 2; fire-fighting pipeline 3; foam generator 4; cavity 41; corrugated plate 42;

[0030] Foam liquid pipeline 5; atomizing nozzle 51; foam liquid supply device 6; one-way valve 7;

[0031] Liquid CO2 pipeline 8; injection head 81; electric regulating valve 9; liquid CO2 supply equipment 10;

[0032] Temperature measuring device 11; sealing object 12. DETAILED DESCRIPTION

[0033] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0034] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "plurality" means two or more. The term "include" and any variation thereof means non-exclusive inclusion, possible presence or addition of one or more other features, units, components and / or combinations thereof.

[0035] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internally connected between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] A first aspect of the present invention provides a fire protection system suitable for a storage tank, such as Figure 1-3 As shown, the fire fighting system suitable for a storage tank comprises a storage tank 1, a foam generator 4, a foam liquid supply device 6 and a liquid CO2 supply device 10;

[0037] A tank top 2 is provided on the top of the storage tank 1, and the tank top 2 is connected to the storage tank 1 through a supporting structure. A fire-fighting pipeline 3 and a temperature measuring device 11 are provided below the tank top 2. A seal 12 is provided at the output end of the fire-fighting pipeline 3, and the input end is connected to the output end of the foam generator 4. The input end of the foam generator 4 is respectively connected to the output ends of the foam liquid supply equipment 6 and the liquid CO2 supply equipment 10.

[0038] According to the above technical scheme, in actual application, when a fire occurs, the sealant at the output end of the fire-fighting pipeline will be quickly melted to make the fire-fighting pipeline conductive. At the same time, the temperature measuring device detects the temperature inside the storage tank in real time. When the detected temperature value exceeds the set value, the foam liquid supply equipment is used to transport the foam liquid to the foam generator. At the same time, the liquid CO2 supply equipment is used to transport liquid CO2 to the foam generator. Then, the foam generator transports the fire-fighting foam to the storage tank through the fire-fighting pipeline for rapid fire extinguishing. It has the advantages of simple operation, easy use, high fire extinguishing efficiency and good effect.

[0039] In a preferred embodiment of the fire fighting system applicable to a storage tank of the present invention, the foam generator 4 comprises a cavity 41;

[0040] A corrugated plate 42 is disposed inside the cavity 41 , and the top of the cavity 41 is connected to the input end of the fire-fighting pipeline 3 .

[0041] In an embodiment of the present invention, Figure 2 As shown, by arranging the corrugated plate 41 inside the cavity 41, in actual application, the airflow can be better stabilized, and the expanded and gasified CO2 can be made to rise evenly while effectively atomizing and foaming the foam liquid, thereby better forming fire-fighting foam, and then quickly extinguishing the fire inside the storage tank 1.

[0042] In a more preferred embodiment, the foam liquid supply device 6 is connected to the cavity 41 via a foam liquid pipeline 5, the cavity end of the foam liquid pipeline 5 extends to the interior of the cavity 41, and an atomizing nozzle 51 is provided at the port, and the atomizing nozzle 51 is located above the corrugated plate 42.

[0043] In an embodiment of the present invention, by arranging an atomizing nozzle at the port at the cavity end of the foam liquid pipeline 5 and being located above the corrugated plate 42, the foam liquid can be atomized while better reacting with the vaporized carbon dioxide to form fire-fighting foam, thereby better extinguishing the fire inside the storage tank 1.

[0044] Further in a more preferred embodiment, the liquid CO2 supply equipment 10 is connected to the cavity 41 through a liquid CO2 pipeline 8, the cavity end of the liquid CO2 pipeline 8 extends to the interior of the cavity 41, and a plurality of injection heads 81 are symmetrically arranged on both sides of the port, and the injection heads 81 are located below the corrugated plate 42.

[0045] In the embodiment of the present invention, by further symmetrically arranging a plurality of injection heads 81 on both sides of the port at the cavity end of the liquid CO2 pipeline 8, the injection heads 81 are located below the corrugated plate 42, so that the liquid CO2 after gasification and expansion inside the liquid CO2 pipeline 8 can be further expanded and sprayed to the bottom of the cavity 41 through the plurality of injection heads 81, and then rectified by the corrugated plate 42 and uniformly acted with the atomized foam liquid, so that the atomized foam liquid can fully form fire foam, thereby effectively extinguishing the fire inside the storage tank 1. Among them, the injection heads 81 are arranged in four groups, so that the gasified CO2 can be expanded and sprayed out better. The liquid CO2 pipeline 8 is provided with an electric regulating valve 9, so that in actual application, the supply amount of liquid CO2 can be adjusted according to the fire extinguishing effect of the fire foam formed under the atomization and foaming action.

[0046] In a specific embodiment, both the foam liquid pipeline 5 and the liquid CO2 pipeline 8 are provided with a one-way valve 7 to prevent the foam liquid and the liquid CO2 from flowing back.

[0047] In a preferred embodiment of the fire protection system for storage tanks of the present invention, the output end of the fire protection pipeline 3 is arranged facing the bottom of the storage tank 1, and the sealant is lead.

[0048] In an embodiment of the present invention, Figure 3 As shown, the fire-fighting pipeline 3 includes three input pipelines and one output pipeline. The output ends of the three input pipelines are connected to the input end of the output pipeline, and the input ends are connected to the output end of the foam generator 3. The port of the output end of the output pipeline is sealed by lead, so as to ensure that when there is no fire, the material in the storage tank 1 will not enter the pipeline along the pipeline and cause corrosion to the pipeline. In the event of a fire, the fire-fighting pipeline can be opened in time when the temperature reaches a specific value without affecting the output of the fire-fighting foam.

[0049] In a preferred embodiment of the fire protection system for storage tanks described in the present invention, the temperature measuring device 11 is a temperature-sensitive optical fiber, so that it can accurately measure the internal temperature of the storage tank 1 and can also be applicable to the environment inside the storage tank 1.

[0050] In a preferred embodiment of the fire protection system suitable for a storage tank of the present invention, the tank top 2 is made of aluminum.

[0051] In the embodiment of the present invention, when the tank top 2 is made of aluminum, in order to effectively extinguish the fire inside the storage tank 1 when a fire occurs inside the storage tank 1, and to ensure that the support structure of the tank top 2 with an aluminum structure will not be melted at the initial stage of the fire, causing the tank top 2 to collapse. The present invention further treats the support structure of the tank top 2. Specifically, first, at a temperature of 40 to 60°C, an aluminum alloy surface pretreatment agent is applied to the surface of the support structure, and the aluminum alloy surface pretreatment agent is reacted with the surface of the support structure for 2 to 10 minutes to remove the secondary phase particles on the surface of the support structure and realize surface activation; then, the surface of the support structure is treated by a sandblasting process until the surface of the support structure reaches Sa2.5 level; then, an epoxy primer layer and a flame retardant antistatic coating are sequentially coated on the surface of the support structure. In a specific embodiment, the thickness of the epoxy primer layer is 10-90 μm, preferably 20-80 μm, and the thickness of the flame retardant antistatic coating is 0.5-2.5 mm, preferably 1-2 mm. In a more specific embodiment, the flame retardant antistatic coating is a polyurea coating, and the polyurea coating contains graphene and ceramic microbeads. In a more specific embodiment, the impurity content in graphene is 0-6%, and the ceramic microbeads contain TiO2, SiO2 and Al2O2. The average particle size of the ceramic microbeads is 18.4-20 μm, the wall thickness is 1-2 μm, they are spherical, have good fluidity, and a density of less than 1 g / cm 3 The support structure may be a support beam, such as Figure 4 shown.

[0052] According to a first specific embodiment of the present invention, the fire fighting system applicable to a storage tank comprises a storage tank 1, a foam generator 4, a foam liquid supply device 6 and a liquid CO2 supply device 10;

[0053] A tank top 2 is provided on the top of the storage tank 1, and the tank top 2 is connected to the storage tank 1 through a supporting structure. A fire-fighting pipeline 3 and a temperature measuring device 11 are provided in sequence below the tank top 2. A sealant 12 is provided at the output end of the fire-fighting pipeline 3, and the input end is connected to the output end of the foam generator 4. The input end of the foam generator 4 is respectively connected to the output ends of the foam liquid supply equipment 6 and the liquid CO2 supply equipment 10.

[0054] The foam generator 4 includes a cavity 41;

[0055] A corrugated plate 42 is disposed inside the cavity 41 , and the top of the cavity 41 is connected to the input end of the fire-fighting pipeline 3 .

[0056] The foam liquid supply device 6 is connected to the cavity 41 via a foam liquid pipeline 5 . The cavity end of the foam liquid pipeline 5 extends to the interior of the cavity 41 , and an atomizing nozzle 51 is provided at the port. The atomizing nozzle 51 is located above the corrugated plate 42 .

[0057] The liquid CO2 supply device 10 is connected to the cavity 41 via a liquid CO2 pipeline 8 , the cavity end of the liquid CO2 pipeline 8 extends to the interior of the cavity 41 , and a plurality of injection heads 81 are symmetrically arranged on both sides of the port, and the injection heads 81 are located below the corrugated plate 42 .

[0058] According to a second specific embodiment of the present invention, the fire fighting system applicable to a storage tank comprises a storage tank 1, a foam generator 4, a foam liquid supply device 6 and a liquid CO2 supply device 10;

[0059] A tank top 2 is provided on the top of the storage tank 1, and the tank top 2 is connected to the storage tank 1 through a supporting structure. A fire-fighting pipeline 3 and a temperature measuring device 11 are provided in sequence below the tank top 2. A sealant 12 is provided at the output end of the fire-fighting pipeline 3, and the input end is connected to the output end of the foam generator 4. The input end of the foam generator 4 is respectively connected to the output ends of the foam liquid supply equipment 6 and the liquid CO2 supply equipment 10.

[0060] The foam generator 4 includes a cavity 41;

[0061] A corrugated plate 42 is disposed inside the cavity 41 , and the top of the cavity 41 is connected to the input end of the fire-fighting pipeline 3 .

[0062] The foam liquid supply device 6 is connected to the cavity 41 via a foam liquid pipeline 5 . The cavity end of the foam liquid pipeline 5 extends to the interior of the cavity 41 , and an atomizing nozzle 51 is provided at the port. The atomizing nozzle 51 is located above the corrugated plate 42 .

[0063] The liquid CO2 supply device 10 is connected to the cavity 41 via a liquid CO2 pipeline 8 , the cavity end of the liquid CO2 pipeline 8 extends to the interior of the cavity 41 , and a plurality of injection heads 81 are symmetrically arranged on both sides of the port, and the injection heads 81 are located below the corrugated plate 42 .

[0064] Both the foam liquid pipeline 5 and the liquid CO2 pipeline 8 are provided with a one-way valve 7 .

[0065] The output end of the fire-fighting pipeline 3 is arranged facing the bottom of the storage tank 1, and the sealing material is lead.

[0066] The temperature measuring device 11 is a temperature-sensitive optical fiber.

[0067] According to a third specific embodiment of the present invention, the fire fighting system applicable to a storage tank comprises a storage tank 1, a foam generator 4, a foam liquid supply device 6 and a liquid CO2 supply device 10;

[0068] A tank top 2 is provided on the top of the storage tank 1, and the tank top 2 is connected to the storage tank 1 through a supporting structure. A fire-fighting pipeline 3 and a temperature measuring device 11 are provided in sequence below the tank top 2. A sealant 12 is provided at the output end of the fire-fighting pipeline 3, and the input end is connected to the output end of the foam generator 4. The input end of the foam generator 4 is respectively connected to the output ends of the foam liquid supply equipment 6 and the liquid CO2 supply equipment 10.

[0069] The foam generator 4 includes a cavity 41;

[0070] A corrugated plate 42 is disposed inside the cavity 41 , and the top of the cavity 41 is connected to the input end of the fire-fighting pipeline 3 .

[0071] The foam liquid supply device 6 is connected to the cavity 41 via a foam liquid pipeline 5 . The cavity end of the foam liquid pipeline 5 extends to the interior of the cavity 41 , and an atomizing nozzle 51 is provided at the port. The atomizing nozzle 51 is located above the corrugated plate 42 .

[0072] The liquid CO2 supply device 10 is connected to the cavity 41 via a liquid CO2 pipeline 8 , the cavity end of the liquid CO2 pipeline 8 extends to the interior of the cavity 41 , and a plurality of injection heads 81 are symmetrically arranged on both sides of the port, and the injection heads 81 are located below the corrugated plate 42 .

[0073] Both the foam liquid pipeline 5 and the liquid CO2 pipeline 8 are provided with a one-way valve 7 .

[0074] The output end of the fire-fighting pipeline 3 is arranged facing the bottom of the storage tank 1, and the sealing material is lead.

[0075] The temperature measuring device 11 is a temperature-sensitive optical fiber.

[0076] The tank top 2 is made of aluminum.

[0077] The surface of the support mechanism is coated with an epoxy primer layer and a flame retardant antistatic coating in sequence from the inside to the outside.

[0078] The thickness of the epoxy primer layer is 10 to 90 μm, and the thickness of the flame retardant antistatic coating is 0.5 to 2.5 mm.

[0079] According to a fourth specific embodiment of the present invention, the fire fighting system applicable to a storage tank comprises a storage tank 1, a foam generator 4, a foam liquid supply device 6 and a liquid CO2 supply device 10;

[0080] A tank top 2 is provided on the top of the storage tank 1, and the tank top 2 is connected to the storage tank 1 through a supporting structure. A fire-fighting pipeline 3 and a temperature measuring device 11 are provided in sequence below the tank top 2. A sealant 12 is provided at the output end of the fire-fighting pipeline 3, and the input end is connected to the output end of the foam generator 4. The input end of the foam generator 4 is respectively connected to the output ends of the foam liquid supply equipment 6 and the liquid CO2 supply equipment 10.

[0081] The foam generator 4 includes a cavity 41;

[0082] A corrugated plate 42 is disposed inside the cavity 41 , and the top of the cavity 41 is connected to the input end of the fire-fighting pipeline 3 .

[0083] The foam liquid supply device 6 is connected to the cavity 41 via a foam liquid pipeline 5 . The cavity end of the foam liquid pipeline 5 extends to the interior of the cavity 41 , and an atomizing nozzle 51 is provided at the port. The atomizing nozzle 51 is located above the corrugated plate 42 .

[0084] The liquid CO2 supply device 10 is connected to the cavity 41 via a liquid CO2 pipeline 8 , the cavity end of the liquid CO2 pipeline 8 extends to the interior of the cavity 41 , and a plurality of injection heads 81 are symmetrically arranged on both sides of the port, and the injection heads 81 are located below the corrugated plate 42 .

[0085] Both the foam liquid pipeline 5 and the liquid CO2 pipeline 8 are provided with a one-way valve 7 .

[0086] The output end of the fire-fighting pipeline 3 is arranged facing the bottom of the storage tank 1, and the sealing material is lead.

[0087] The temperature measuring device 11 is a temperature-sensitive optical fiber.

[0088] The tank top 2 is made of aluminum.

[0089] The surface of the support mechanism is coated with an epoxy primer layer and a flame retardant antistatic coating in sequence from the inside to the outside.

[0090] The thickness of the epoxy primer layer is 10 to 90 μm, and the thickness of the flame retardant antistatic coating is 0.5 to 2.5 mm.

[0091] The flame retardant antistatic coating is a polyurea coating, and the polyurea coating contains graphene and ceramic microbeads.

[0092] The impurity content in graphene is 0-6%, and the ceramic microbeads contain TiO2, SiO2 and Al2O2.

[0093] The second aspect of the present invention further provides a fire fighting method applicable to a storage tank, which is implemented using the fire fighting system applicable to a storage tank, and the method comprises:

[0094] sequentially coating an epoxy primer layer and a flame retardant antistatic coating on the surface of the supporting mechanism;

[0095] When a fire occurs, the sealant at the output end of the fire-fighting pipeline 3 is melted under the action of high temperature, and the temperature measuring device 11 detects the temperature inside the storage tank 1 in real time. When the detected temperature value exceeds the set value, the foam liquid supply device 6 is used to transport the foam liquid to the foam generator 4, and the liquid CO2 supply device 10 is used to transport liquid CO2 to the foam generator 4. Then the foam generator 4 transports the fire-fighting foam to the interior of the storage tank 1 through the fire-fighting pipeline 3 for fire extinguishing.

[0096] The fire fighting method applicable to storage tanks of the present invention, in a preferred embodiment, before the epoxy primer layer and the flame retardant antistatic coating are sequentially coated on the surface of the support mechanism, further comprises:

[0097] Under the condition of temperature of 40-60°C, a metal surface pretreatment agent is applied to the surface of the support structure, and the metal surface pretreatment agent is reacted with the surface of the support structure for 2-10 minutes to remove the secondary phase particles on the surface of the support structure; then the surface of the support structure is treated by sandblasting until the surface of the support structure reaches Sa2.5 level. The metal surface pretreatment agent is an aluminum alloy surface pretreatment agent.

[0098] The present invention will be described in detail below through examples, but the protection scope of the present invention is not limited thereto.

[0099] Example 1

[0100] like Figure 1-3 As shown, the fire protection system suitable for a storage tank of the present invention is implemented, and the system includes a storage tank 1, a foam generator 4, a foam liquid supply device 6 and a liquid CO2 supply device 10;

[0101] A tank top 2 is provided on the top of the storage tank 1, and the tank top 2 is connected to the storage tank 1 through a supporting structure. A fire-fighting pipeline 3 and a temperature measuring device 11 are provided in sequence below the tank top 2. A sealant 12 is provided at the output end of the fire-fighting pipeline 3, and the input end is connected to the output end of the foam generator 4. The input end of the foam generator 4 is respectively connected to the output ends of the foam liquid supply equipment 6 and the liquid CO2 supply equipment 10.

[0102] In actual application, when a fire occurs, the sealant at the output end of the fire-fighting pipeline 3 will be quickly melted, making the fire-fighting pipeline 3 conductive. At the same time, the temperature measuring device 11 detects the temperature inside the storage tank 1 in real time. When the detected temperature value exceeds the set value, the foam liquid supply device 6 is used to transport the foam liquid to the foam generator 4. At the same time, the liquid CO2 supply device 10 is used to transport liquid CO2 to the foam generator 4. Then, the foam generator 4 transports the fire-fighting foam to the storage tank 1 through the fire-fighting pipeline 3 for fire extinguishing.

[0103] It has been tested that the fire fighting system suitable for a storage tank described in the present invention can be used to quickly and effectively extinguish a fire inside the storage tank.

[0104] Example 2

[0105] The embodiment 1 is implemented with reference to the embodiment 1, but the difference therefrom is that the foam generator 4 includes a cavity 41; a corrugated plate 42 is arranged inside the cavity 41, and the top of the cavity 41 is connected to the input end of the fire-fighting pipeline 3; the foam liquid supply device 6 is connected to the cavity 41 through a foam liquid pipeline 5, the cavity end of the foam liquid pipeline 5 extends to the interior of the cavity 41, and an atomizing nozzle 51 is arranged at the port, and the atomizing nozzle 51 is located above the corrugated plate 42; the liquid CO2 supply device 10 is connected to the cavity 41 through a liquid CO2 pipeline 8, the cavity end of the liquid CO2 pipeline 8 extends to the interior of the cavity 41, and a plurality of injection heads 81 are symmetrically arranged on both sides of the port, and the injection heads 81 are located below the corrugated plate 42.

[0106] In actual application, when a fire occurs, the sealant at the output end of the fire-fighting pipeline will be quickly melted, making the fire-fighting pipeline conductive. At the same time, the temperature measuring device detects the temperature inside the storage tank in real time. When the detected temperature value exceeds the set value, the foam liquid supply equipment is used to transport the foam liquid to the upper part of the cavity of the foam generator through the foam liquid pipeline. At the same time, the liquid CO2 supply equipment is used to transport the liquid CO2 to the lower part of the cavity of the foam generator through the liquid CO2 pipeline, so that the CO2 atomizes and foams the foam liquid in the process of rising along the corrugated plate. Then the foam generator transports the fire-fighting foam to the storage tank through the fire-fighting pipeline for fire extinguishing.

[0107] It has been tested that the fire fighting system suitable for a storage tank described in the present invention can extinguish the fire inside the storage tank more quickly and effectively compared to the solution in Example 1.

[0108] Example 3

[0109] Refer to Example 2 for implementation, except that the output end of the fire-fighting pipeline 3 is arranged facing the bottom of the storage tank 1, the sealant is lead; and the temperature measuring device 11 is a temperature-sensitive optical fiber.

[0110] In actual application, when a fire occurs, the lead at the output end of the fire-fighting pipeline will be quickly melted, making the fire-fighting pipeline conductive. At the same time, the temperature-sensing optical fiber detects the temperature inside the storage tank in real time. When the detected temperature value exceeds the set value, the foam liquid supply device is used to transport the foam liquid to the upper part of the cavity of the foam generator through the foam liquid pipeline. At the same time, the liquid CO2 supply device is used to transport the liquid CO2 to the lower part of the cavity of the foam generator through the liquid CO2 pipeline, so that the CO2 atomizes and foams the foam liquid in the process of rising along the corrugated plate. Then the foam generator transports the fire-fighting foam to the storage tank through the fire-fighting pipeline for fire extinguishing.

[0111] It has been tested that the fire fighting system suitable for a storage tank described in the present invention can extinguish the fire inside the storage tank more quickly and effectively than the solution in Example 2.

[0112] Example 4

[0113] Refer to Example 3, except that the tank top 2 is made of aluminum, and the surface of the support mechanism is coated with an epoxy primer layer and a flame retardant antistatic coating in sequence from the inside to the outside.

[0114] In actual application, when a fire occurs, the lead at the output end of the fire-fighting pipeline will be quickly melted, making the fire-fighting pipeline conductive. At the same time, the temperature-sensing optical fiber detects the temperature inside the storage tank in real time. When the detected temperature value exceeds the set value, the foam liquid supply device is used to transport the foam liquid to the upper part of the cavity of the foam generator through the foam liquid pipeline. At the same time, the liquid CO2 supply device is used to transport the liquid CO2 to the lower part of the cavity of the foam generator through the liquid CO2 pipeline, so that the CO2 atomizes and foams the foam liquid in the process of rising along the corrugated plate. Then the foam generator transports the fire-fighting foam to the storage tank through the fire-fighting pipeline for fire extinguishing.

[0115] It has been tested that the fire fighting system suitable for storage tanks described in the present invention can quickly and effectively extinguish the fire inside the storage tank, and ensure that the supporting structure of the tank top will not melt and affect the supporting effect.

[0116] Example 5

[0117] The method is implemented with reference to Example 4, except that, before the epoxy primer layer and the flame retardant antistatic coating are sequentially coated on the surface of the support structure, the method further includes applying a metal surface pretreatment agent to the surface of the support structure at a temperature of 50°C, and reacting the metal surface pretreatment agent with the surface of the support structure for 5 minutes to remove secondary phase particles on the surface of the support structure; then, the surface of the support structure is treated by sandblasting until the surface of the support structure reaches Sa2.5 level; the metal surface pretreatment agent is an aluminum alloy surface pretreatment agent.

[0118] In actual application, when a fire occurs, the lead at the output end of the fire-fighting pipeline will be quickly melted, making the fire-fighting pipeline conductive. At the same time, the temperature-sensing optical fiber detects the temperature inside the storage tank in real time. When the detected temperature value exceeds the set value, the foam liquid supply device is used to transport the foam liquid to the upper part of the cavity of the foam generator through the foam liquid pipeline. At the same time, the liquid CO2 supply device is used to transport the liquid CO2 to the lower part of the cavity of the foam generator through the liquid CO2 pipeline, so that the CO2 atomizes and foams the foam liquid in the process of rising along the corrugated plate. Then the foam generator transports the fire-fighting foam to the storage tank through the fire-fighting pipeline for fire extinguishing.

[0119] It has been tested that the fire fighting system suitable for storage tanks described in the present invention can be used to quickly and effectively extinguish the fire inside the storage tank, and can also ensure that the supporting structure of the tank top will not melt and affect the supporting effect.

[0120] Example 6

[0121] The method is implemented with reference to Example 5, except that the thickness of the epoxy primer layer is 60 μm, and the thickness of the flame retardant antistatic coating is 1 mm.

[0122] In actual application, when a fire occurs, the lead at the output end of the fire-fighting pipeline will be quickly melted, making the fire-fighting pipeline conductive. At the same time, the temperature-sensing optical fiber detects the temperature inside the storage tank in real time. When the detected temperature value exceeds the set value, the foam liquid supply device is used to transport the foam liquid to the upper part of the cavity of the foam generator through the foam liquid pipeline. At the same time, the liquid CO2 supply device is used to transport the liquid CO2 to the lower part of the cavity of the foam generator through the liquid CO2 pipeline, so that the CO2 atomizes and foams the foam liquid in the process of rising along the corrugated plate. Then the foam generator transports the fire-fighting foam to the storage tank through the fire-fighting pipeline for fire extinguishing.

[0123] After testing, it is found that the fire fighting system suitable for storage tanks described in the present invention can quickly and effectively extinguish the fire inside the storage tank compared to the solution in Example 5, and can better ensure that the supporting structure of the tank top will not melt and affect the supporting effect.

[0124] Example 7

[0125] Refer to Example 6, except that the impurity content in the graphene is 5%, and the ceramic microbeads contain TiO2, SiO2 and Al2O2.

[0126] In actual application, when a fire occurs, the lead at the output end of the fire-fighting pipeline will be quickly melted, making the fire-fighting pipeline conductive. At the same time, the temperature-sensing optical fiber detects the temperature inside the storage tank in real time. When the detected temperature value exceeds the set value, the foam liquid supply device is used to transport the foam liquid to the upper part of the cavity of the foam generator through the foam liquid pipeline. At the same time, the liquid CO2 supply device is used to transport the liquid CO2 to the lower part of the cavity of the foam generator through the liquid CO2 pipeline, so that the CO2 atomizes and foams the foam liquid in the process of rising along the corrugated plate. Then the foam generator transports the fire-fighting foam to the storage tank through the fire-fighting pipeline for fire extinguishing.

[0127] After testing, it is found that the fire fighting system suitable for storage tanks described in the present invention can quickly and effectively extinguish the fire inside the storage tank compared to the solution in Example 6, and can better ensure that the supporting structure of the tank top will not melt and affect the supporting effect.

[0128] Example 8

[0129] The method is implemented with reference to Example 5, except that the thickness of the epoxy primer layer is 40 μm, and the thickness of the flame retardant antistatic coating is 1.5 mm.

[0130] In actual application, when a fire occurs, the lead at the output end of the fire-fighting pipeline will be quickly melted, making the fire-fighting pipeline conductive. At the same time, the temperature-sensing optical fiber detects the temperature inside the storage tank in real time. When the detected temperature value exceeds the set value, the foam liquid supply device is used to transport the foam liquid to the upper part of the cavity of the foam generator through the foam liquid pipeline. At the same time, the liquid CO2 supply device is used to transport the liquid CO2 to the lower part of the cavity of the foam generator through the liquid CO2 pipeline, so that the CO2 atomizes and foams the foam liquid in the process of rising along the corrugated plate. Then the foam generator transports the fire-fighting foam to the storage tank through the fire-fighting pipeline for fire extinguishing.

[0131] After testing, it is found that the fire fighting system suitable for storage tanks described in the present invention can quickly and effectively extinguish the fire inside the storage tank compared to the solution in Example 5, and can better ensure that the supporting structure of the tank top will not melt and affect the supporting effect.

[0132] Example 9

[0133] The method is implemented with reference to Example 5, except that the thickness of the epoxy primer layer is 30 μm, and the thickness of the flame retardant antistatic coating is 1.8 mm.

[0134] In actual application, when a fire occurs, the lead at the output end of the fire-fighting pipeline will be quickly melted, making the fire-fighting pipeline conductive. At the same time, the temperature-sensing optical fiber detects the temperature inside the storage tank in real time. When the detected temperature value exceeds the set value, the foam liquid supply device is used to transport the foam liquid to the upper part of the cavity of the foam generator through the foam liquid pipeline. At the same time, the liquid CO2 supply device is used to transport the liquid CO2 to the lower part of the cavity of the foam generator through the liquid CO2 pipeline, so that the CO2 atomizes and foams the foam liquid in the process of rising along the corrugated plate. Then the foam generator transports the fire-fighting foam to the storage tank through the fire-fighting pipeline for fire extinguishing.

[0135] After testing, it is found that the fire fighting system suitable for storage tanks described in the present invention can quickly and effectively extinguish the fire inside the storage tank compared to the solution in Example 5, and can better ensure that the supporting structure of the tank top will not melt and affect the supporting effect.

[0136] Example 10

[0137] The method is implemented with reference to Example 7, except that the content of impurities in the graphene is 4%.

[0138] In actual application, when a fire occurs, the lead at the output end of the fire-fighting pipeline will be quickly melted, making the fire-fighting pipeline conductive. At the same time, the temperature-sensing optical fiber detects the temperature inside the storage tank in real time. When the detected temperature value exceeds the set value, the foam liquid supply device is used to transport the foam liquid to the upper part of the cavity of the foam generator through the foam liquid pipeline. At the same time, the liquid CO2 supply device is used to transport the liquid CO2 to the lower part of the cavity of the foam generator through the liquid CO2 pipeline, so that the CO2 atomizes and foams the foam liquid in the process of rising along the corrugated plate. Then the foam generator transports the fire-fighting foam to the storage tank through the fire-fighting pipeline 3 for fire extinguishing.

[0139] After testing, it is found that the fire fighting system suitable for storage tanks described in the present invention can quickly and effectively extinguish the fire inside the storage tank compared to the solution in Example 7, and can better ensure that the supporting structure of the tank top will not melt and affect the supporting effect.

[0140] The fire fighting system and method suitable for storage tanks provided by the present invention, when a fire occurs, the sealant at the output end of the fire fighting pipeline will be quickly melted to make the fire fighting pipeline conductive, and at the same time, the temperature measuring device detects the temperature inside the storage tank in real time, and when the detected temperature value exceeds the set value, the foam liquid supply equipment is used to transport the foam liquid to the foam generator, and at the same time, the liquid CO2 supply equipment is used to transport liquid CO2 to the foam generator, and then the foam generator transports the fire fighting foam to the storage tank through the fire fighting pipeline for fire extinguishing. The system and method have the advantages of simple operation, convenient use, high fire extinguishing efficiency and good effect.

[0141] The preferred embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A fire protection system suitable for a storage tank, characterized in that: The fire fighting system applicable to a storage tank comprises a storage tank (1), a foam generator (4), a foam liquid supply device (6) and a liquid CO2 supply device (10); A tank top (2) is arranged on the top of the storage tank (1), and the tank top (2) is connected to the storage tank (1) via a supporting structure. A fire-fighting pipeline (3) and a temperature measuring device (11) are arranged below the tank top (2). A seal (12) is arranged at the output end of the fire-fighting pipeline (3), and the input end is connected to the output end of the foam generator (4). The input end of the foam generator (4) is respectively connected to the output ends of the foam liquid supply device (6) and the liquid CO2 supply device (10).

2. The fire fighting system for a storage tank according to claim 1, characterized in that: The foam generator (4) comprises a cavity (41); A corrugated plate (42) is provided inside the cavity (41), and the top of the cavity (41) is connected to the input end of the fire-fighting pipeline (3).

3. The fire fighting system for storage tanks according to claim 2, characterized in that: The foam liquid supply device (6) is connected to the cavity (41) via a foam liquid pipeline (5); the cavity end of the foam liquid pipeline (5) extends into the interior of the cavity (41), and an atomizing nozzle (51) is provided at the port; the atomizing nozzle (51) is located above the corrugated plate (42).

4. The fire fighting system for storage tanks according to claim 2 or 3, characterized in that: The liquid CO2 supply device (10) is connected to the cavity (41) via a liquid CO2 pipeline (8); the cavity end of the liquid CO2 pipeline (8) extends into the interior of the cavity (41), and a plurality of injection heads (81) are symmetrically arranged on both sides of the port; the injection heads (81) are located below the corrugated plate (42).

5. The fire fighting system for storage tanks according to claim 4, characterized in that: Both the foam liquid pipeline (5) and the liquid CO2 pipeline (8) are provided with a one-way valve (7).

6. The fire fighting system for a storage tank according to claim 1, characterized in that: The output end of the fire-fighting pipeline (3) is arranged facing the bottom of the storage tank (1), and the sealing material is lead.

7. The fire fighting system for storage tanks according to claim 1 or 6, characterized in that: The temperature measuring device (11) is a temperature-sensitive optical fiber.

8. The fire fighting system for a storage tank according to claim 1, characterized in that: The tank top (2) is made of aluminum.

9. The fire fighting system for storage tanks according to claim 1 or 8, characterized in that: The surface of the support mechanism is coated with an epoxy primer layer and a flame retardant antistatic coating in sequence from the inside to the outside.

10. The fire fighting system for a storage tank according to claim 9, characterized in that: The thickness of the epoxy primer layer is 10 to 90 μm, and the thickness of the flame retardant antistatic coating is 0.5 to 2.5 mm.

11. The fire fighting system for a storage tank according to claim 10, characterized in that: The flame retardant antistatic coating is a polyurea coating, and the polyurea coating contains graphene and ceramic microbeads.

12. The fire fighting system for a storage tank according to claim 11, characterized in that: The impurity content in graphene is 0-6%, and the ceramic microbeads contain TiO2, SiO2 and Al2O2.

13. A fire fighting method applicable to a storage tank, implemented using the fire fighting system applicable to a storage tank as claimed in any one of claims 1 to 12, characterized in that: The method includes: sequentially coating an epoxy primer layer and a flame retardant antistatic coating on the surface of the supporting mechanism; When a fire occurs, the sealant at the output end of the fire-fighting pipeline (3) is melted under the action of high temperature, and the temperature measuring device (11) detects the temperature inside the storage tank (1) in real time. When the detected temperature value exceeds the set value, the foam liquid supply device (6) is used to transport the foam liquid to the foam generator (4), and at the same time, the liquid CO2 supply device (10) is used to transport liquid CO2 to the foam generator (4). Then, the foam generator (4) transports the fire-fighting foam to the interior of the storage tank (1) through the fire-fighting pipeline (3) to extinguish the fire.

14. The fire fighting method applicable to a storage tank according to claim 13, characterized in that: Before the epoxy primer layer and the flame retardant antistatic coating are sequentially coated on the surface of the support mechanism, the method further comprises: At a temperature of 40 to 60° C., a metal surface pretreatment agent is applied to the surface of the support structure, and the metal surface pretreatment agent is reacted with the surface of the support structure for 2 to 10 minutes to remove secondary phase particles on the surface of the support structure; then, the surface of the support structure is treated by a sandblasting process until the surface of the support structure reaches Sa2.5 level.

15. The fire fighting method applicable to a storage tank according to claim 14, characterized in that: The metal surface pretreatment agent is an aluminum alloy surface pretreatment agent.

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