Liquefied hydrocarbon spherical tank protection device and design method thereof

Abstract

The invention relates to the technical field of spherical tank protection, in particular to a liquefied hydrocarbon spherical tank protection device and a design method thereof.The protection device comprises a tank body protection cover used for protecting a tank body, and the tank body protection cover comprises an inner protection layer and an outer protection layer arranged on the inner protection layer; a plurality of cavities are formed between the inner protective layer and the outer protective layer in a surrounding manner and are filled with a buffer solution. According to the protective device, the tank body is protected by adopting the tank body protective cover, in the practical application, the safety of the spherical tank can be effectively guaranteed, splashing objects are prevented from directly impacting the spherical tank, the spherical tank is prevented from being damaged, and the protective device has the advantages of being easy and convenient to operate, simple in structure, high in safety and capable of saving cost.

Description

Technical Field

[0001] The present invention relates to the technical field of spherical tank protection, and particularly relates to a liquefied hydrocarbon spherical tank protection device and a design method thereof. Background Art

[0002] As a thin-shell structure, the liquefied hydrocarbon spherical tank has many advantages such as large capacity, low cost, and good stability, so it is widely used in petrochemical enterprises and chemical industrial parks. However, under the action of a combustible vapor cloud explosion or the impact of flying objects, the thin-walled steel storage tank is extremely prone to large plastic deformation or penetration damage, which will lead to the leakage of internal combustible substances and cause secondary explosions and even a chain domino effect.

[0003] At present, existing relevant domestic and foreign standards and specifications have not proposed effective measures for the anti-explosion and anti-impact protection of the spherical tank body. Therefore, for the protection of the spherical tank, the more common methods are usually masonry walls or the installation of concrete protection plates to place the spherical tank in a safe environment to ensure the safety of the spherical tank. However, these methods can only be applied to some small spherical tanks and are difficult to be applied to large-size and high-back-pressure spherical tanks. Moreover, they have the disadvantages of complex implementation and high cost. Even in some cases where the application site is limited, the above methods cannot be used to protect the spherical tank.

[0004] Therefore, there is an urgent need for a liquefied hydrocarbon spherical tank protection device and a design method thereof to comprehensively improve the anti-explosion and anti-impact protection performance of the spherical tank. Summary of the Invention

[0005] In order to solve the problem that there is a lack of effective protection devices for the protection of spherical tanks, especially for liquefied hydrocarbon spherical tanks, in the prior art, the present invention provides a liquefied hydrocarbon spherical tank protection device and a design method thereof.

[0006] To achieve the above object, in the first aspect of the present invention, a liquefied hydrocarbon spherical tank protection device is provided, and the protection device includes:

[0007] A tank body protection cover for protecting the tank body. The tank body protection cover includes an inner protection layer and an outer protection layer provided on the inner protection layer. A plurality of cavities are enclosed between the inner protection layer and the outer protection layer, and a buffer liquid is filled in the cavities.

[0008] Preferably, the cross-section of the cavity is trapezoidal, and the length of the bottom side of the trapezoidal cavity close to the tank body is less than the length of the bottom side away from the tank body.

[0009] Preferably, the inner protection layer is a corrugated structure, and the corrugated structure is made of alloy steel.

[0010] Preferably, the outer protection layer is a soft protection layer, and the soft protection layer is made of Kevlar or ultra-high molecular weight polyethylene.

[0011] Preferably, the buffer solution is water or a shear thickening fluid.

[0012] Preferably, the tank body protective cover further includes a pressure relief port for discharging the buffer solution to a safe area according to the magnitude of the impact force when being impacted.

[0013] Preferably, it further includes a spherical tank support column protection structure for protecting the support columns of the spherical tank.

[0014] Preferably, the spherical tank support column protection structure is a star-shaped plate.

[0015] Preferably, the star-shaped plate is made of alloy steel.

[0016] Preferably, the spherical tank support column protection structure includes a buffer layer and a protective shell provided on the buffer layer.

[0017] Preferably, the buffer layer is made of aluminum foam or hard rubber, and the protective shell is made of alloy steel.

[0018] Preferably, the spherical tank support column protection structure includes a star-shaped plate and a protective shell provided on the star-shaped plate, and a buffer material is filled in the cavity between the star-shaped plate and the protective shell.

[0019] Preferably, both the star-shaped plate and the protective shell are made of alloy steel, and the buffer material is aluminum foam or hard rubber.

[0020] Preferably, a fireproof layer is provided on the outer protective layer.

[0021] The second aspect of the present invention provides a design method for a liquefied hydrocarbon spherical tank protection device, which is applied to the liquefied hydrocarbon spherical tank protection device, and the method includes:

[0022] Based on the installation location of the liquefied hydrocarbon spherical tank, quantitatively evaluate the risks it faces and obtain the quantitative evaluation result;

[0023] Determine the bottom side length of the trapezoidal cavity according to the quantitative evaluation result.

[0024] Preferably, the quantitative evaluation of the risks it faces specifically includes:

[0025] According to the layout and risk level of the devices around the liquefied hydrocarbon spherical tank and the local meteorological conditions, quantitatively evaluate the risks it faces by using the numerical simulation method.

[0026] Preferably, the quantitative evaluation result includes the impact force of the splashes, and the bottom side length of the trapezoidal cavity is inversely proportional to the impact force of the splashes.

[0027] According to the above technical solution, by using the tank body protective cover to protect the tank body, in actual application, the safety of the spherical tank can be effectively guaranteed, preventing splashes from directly impacting the spherical tank and causing the spherical tank to be damaged. It has the advantages of simple operation, simple structure, high safety and cost savings.

[0028] At the same time, by setting the cross-section of the cavity to be trapezoidal, and the length of the bottom side of the trapezoidal cavity close to the tank body is less than the length of the bottom side away from the tank body, and when designing, making the length of the bottom side of the trapezoidal cavity inversely proportional to the impact force of the splashes, the protection effect can be further improved.

[0029] By setting the inner protective layer to be a corrugated structure, and the corrugated structure is made of alloy steel, the protection effect can be further improved.

[0030] By setting the outer protective layer to be a soft protective layer, and the soft protective layer is made of Kevlar or ultra-high molecular weight polyethylene, the protection effect can be further improved.

[0031] By setting the buffer liquid to be a shear thickening fluid, the protection effect can be further improved.

[0032] By setting that the tank body protective cover further includes a pressure relief port, which is used to discharge the buffer liquid to the safe area according to the magnitude of the impact force when being impacted. In the actual application process, the tank body protective cover can be reused multiple times without having to be replaced after one impact, having the advantages of cost savings and good protection effect.

[0033] By setting the spherical tank support column protection structure, it can prevent the support column from bending or breaking, resulting in the collapse of the tank body. Description of the Drawings

[0034] Figure 1 is a schematic cross-sectional structure diagram of the liquefied hydrocarbon spherical tank protection device;

[0035] Figure 2 is an application effect diagram of the liquefied hydrocarbon spherical tank protection device;

[0036] Figure 3 is a schematic structure diagram of the spherical tank support column protection structure of the liquefied hydrocarbon spherical tank protection device in a specific embodiment;

[0037] Figure 4 is a schematic structure diagram of the spherical tank support column protection structure of the liquefied hydrocarbon spherical tank protection device in another specific embodiment;

[0038] Figure 5 is a schematic structure diagram of the spherical tank support column protection structure of the liquefied hydrocarbon spherical tank protection device in another specific embodiment.

[0039] Description of the Reference Numerals

[0040] 1. Inner protective layer; 2. Outer protective layer; 3. Cavity; 4. Tank body. Specific embodiments

[0041] The following will describe in detail the specific embodiments of the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining and illustrating the embodiments of the present invention, and are not used to limit the embodiments of the present invention.

[0042] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating relative importance or implicitly indicating the quantity of the indicated technical features. Thus, unless otherwise specified, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features; the meaning of "a plurality" is two or more. The term "comprising" and any deformation thereof means non-exclusive inclusion, and may include one or more other features, units, components and / or combinations thereof.

[0043] In addition, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, or the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0044] The first aspect of the present invention provides a protective device for a liquefied hydrocarbon spherical tank, as Figure 1 shown, the protective device for the liquefied hydrocarbon spherical tank includes:

[0045] A tank body protective cover for protecting the tank body 4, the tank body protective cover includes an inner protective layer 1 and an outer protective layer 2 provided on the inner protective layer 1, and a plurality of cavities 3 are enclosed between the inner protective layer 1 and the outer protective layer 2, and a buffer liquid is filled in the cavities 3.

[0046] According to the above technical solution, by using the tank body protective cover to protect the tank body, in practical applications, the safety of the spherical tank can be effectively ensured, preventing flying objects from directly impacting the spherical tank and causing the spherical tank to be damaged, which has the advantages of simple operation, simple structure, high safety and cost savings.

[0047] In a preferred embodiment of the protective device for the liquefied hydrocarbon spherical tank of the present invention, the cross-section of the cavity 3 is trapezoidal, and the length of the bottom side of the trapezoidal cavity 3 close to the tank body 4 is less than the length of the bottom side away from the tank body 4.

[0048] In the embodiment of the present invention, asFigure 1 As shown, by setting the cavity 3 to be trapezoidal, the protection performance of the tank body protective cover can be effectively improved. Preferably, the length of the bottom side of the trapezoidal cavity 3 close to the tank body 4 is less than the length of the bottom side away from the tank body 4. More preferably, the length of the bottom side of the trapezoidal cavity 3 is set according to the protection requirements of the actual application scenario. Specifically, based on the installation position of the liquefied hydrocarbon spherical tank, according to the layout and risk level of the surrounding devices of the liquefied hydrocarbon spherical tank, and the local meteorological conditions, the risks it faces are quantitatively evaluated by the numerical simulation method, and a quantitative evaluation result is obtained; then, according to the quantitative evaluation result, the length of the bottom side of the trapezoidal cavity 3 is determined. More specifically, the quantitative evaluation result includes the impact force of the splashes. The length of the bottom side of the trapezoidal cavity 3 is inversely proportional to the impact force of the splashes, that is, the greater the impact force of the splashes, the smaller the length of the bottom side of the trapezoidal cavity 3, and vice versa, it can be appropriately enlarged to ensure the protection effect while saving costs. Among them, the length of the bottom side of the trapezoidal cavity 3 cannot be reduced without limit, and it is also necessary to ensure that there is enough buffer liquid inside the cavity 3. Preferably, the length of the bottom side of the trapezoidal cavity 3 is balanced with the buffer liquid inside the cavity 3 to optimize the protection effect and economic benefits.

[0049] In a preferred embodiment of the liquefied hydrocarbon spherical tank protection device of the present invention, the inner protection layer 1 is a corrugated structure, and the corrugated structure is made of alloy steel.

[0050] In the embodiment of the present invention, as Figure 1 shown, by setting the inner protection layer 1 to be a corrugated structure, the protection effect of the device can be effectively improved. Further, by setting the corrugated structure to be made of alloy steel with light weight, good weather resistance and corrosion resistance, the protection effect can be further ensured.

[0051] In a preferred embodiment of the liquefied hydrocarbon spherical tank protection device of the present invention, the outer protection layer 2 is a soft protection layer, and the soft protection layer is made of Kevlar or ultra-high molecular weight polyethylene.

[0052] In the embodiment of the present invention, by setting the outer protection layer 2 to be a soft protection layer, the protection effect of the device can be effectively improved. Further, by setting the soft protection layer to be made of Kevlar or ultra-high molecular weight polyethylene with high impact resistance, the protection effect can be further ensured.

[0053] ​The liquefied hydrocarbon spherical tank protection device described in the present invention, in a preferred embodiment, the buffer liquid is water or shear thickening fluid. During actual application, by filling the cavity 3 between the inner protection layer 1 and the outer protection layer 2 with shear thickening fluid, and further setting that the tank body protection cover further includes a pressure relief port, which is used to discharge the buffer liquid to a safe area according to the magnitude of the impact force when being impacted, it can effectively improve the protection effect and enable the tank body protection cover to be used multiple times without being replaced after each use, having the advantages of good protection effect and high economic benefits. Specifically, the principle of using the buffer liquid to play a buffering and protecting role is as Figure 2 shown.

[0054] The liquefied hydrocarbon spherical tank protection device described in the present invention, in a preferred embodiment, further includes a spherical tank support column protection structure for protecting the support column of the spherical tank.

[0055] In a specific embodiment, the spherical tank support column protection structure is a star-shaped plate. Preferably, the star-shaped plate is made of alloy steel.

[0056] In another specific embodiment, the spherical tank support column protection structure includes a buffer layer and a protective shell arranged on the buffer layer. Preferably, the buffer layer is made of aluminum foam or hard rubber, and the protective shell is made of alloy steel.

[0057] In another specific embodiment, the spherical tank support column protection structure includes a star-shaped plate and a protective shell arranged on the star-shaped plate, and a buffer material is filled in the cavity between the star-shaped plate and the protective shell. Preferably, both the star-shaped plate and the protective shell are made of alloy steel, and the buffer material is aluminum foam or hard rubber.

[0058] In the embodiment of the present invention, it is found in actual application that if only the tank body 4 is protected, although it can ensure that the tank body 4 will not be damaged, there are still some flying objects directly hitting the support column, resulting in the bending or even breaking of the support column, thus leading to the risk of the tank body collapsing. Therefore, the present invention further designs three different schemes according to the mass of the flying objects that may hit the support column, so as to maximize the economic benefits while ensuring the protection effect. Specifically, as Figure 3 shown, if the mass of the flying objects that may hit the support column does not exceed 50 kg at most, then the spherical tank support column protection structure can directly select a star-shaped plate and be directly arranged on the surface of the support column by welding. Thus, under the action of the explosion flying objects, the star-shaped plate deflects fragments and destroys and absorbs energy, playing the role of a "sacrificial layer" to protect the internal support column body, and at the same time, it can also play the role of a support column stiffener to improve the vertical load-bearing capacity of the support column. As Figure 4As shown, when the mass of the flying objects that may hit the support column is greater than 50 kg and less than 110 kg, the protection structure of the spherical tank support column includes a buffer layer and a protective shell arranged on the buffer layer. Thus, under the action of the explosion flying objects, the buffer layer and the protective shell can play a role in absorbing collision energy. As Figure 5 As shown, when the mass of the flying objects that may hit the support column is greater than 110 kg and less than 200 kg, the protection structure of the spherical tank support column includes a star-shaped plate and a protective shell arranged on the star-shaped plate. A buffer material is filled in the cavity between the star-shaped plate and the protective shell. Thus, the abilities of the star-shaped plate and the energy-absorbing buffer material to destroy and absorb the flying objects and the explosion shock wave are comprehensively utilized. At the same time, the star-shaped plate can provide a reverse supporting force for the protective shell, further improving the explosion and impact resistance performance of the protective shell.

[0059] In a preferred embodiment of the liquefied hydrocarbon spherical tank protection device of the present invention, a fireproof layer is provided on the outer protection layer 2. Thus, it is ensured that the tank body protective cover will not be damaged when a fire occurs.

[0060] The second aspect of the present invention also provides a design method for a liquefied hydrocarbon spherical tank protection device, which is applied to the liquefied hydrocarbon spherical tank protection device. The design method includes:

[0061] Based on the installation position of the liquefied hydrocarbon spherical tank, quantitatively evaluate the risks it faces and obtain the quantitative evaluation results;

[0062] Determine the bottom length of the trapezoidal cavity 3 according to the quantitative evaluation results.

[0063] In a preferred embodiment of the method of the present invention, the quantitative evaluation of the risks it faces specifically includes:

[0064] According to the layout and risk level of the devices around the liquefied hydrocarbon spherical tank and the local meteorological conditions, use the numerical simulation method to quantitatively evaluate the risks it faces.

[0065] In another preferred embodiment, the quantitative evaluation results include the impact force of the flying objects, and the bottom length of the trapezoidal cavity 3 is inversely proportional to the impact force of the flying objects.

[0066] In the method of the present invention, by quantitatively evaluating the risks faced by the liquefied hydrocarbon spherical tank according to the layout and risk level of the surrounding devices of the liquefied hydrocarbon spherical tank and the local meteorological conditions, and finally determining the bottom length of the trapezoidal cavity 3 based on the fact that the bottom length of the trapezoidal cavity 3 is inversely proportional to the impact force of the splashes, the protection effect can be effectively ensured and the cost can be saved. Among them, the bottom length of the trapezoidal cavity 3 cannot be reduced without limit, and it is also necessary to ensure that there is enough buffer liquid inside the cavity 3. Preferably, the bottom length of the trapezoidal cavity 3 is balanced with the buffer liquid inside the cavity 3 to optimize the protection effect and economic benefits. Specifically, the change in the bottom length of the trapezoidal cavity 3 can be achieved by selecting corrugated structures of different sizes.

[0067] According to some embodiments of the present invention, the liquefied hydrocarbon spherical tank protection device includes:

[0068] A tank body protection cover for protecting the tank body 4. The tank body protection cover includes an inner protection layer 1 and an outer protection layer 2 provided on the inner protection layer 1. A plurality of cavities 3 are defined between the inner protection layer 1 and the outer protection layer 2, and the cavities 3 are filled with buffer liquid;

[0069] A fireproof layer is provided on the outer protection layer 2.

[0070] According to some other embodiments of the present invention, the liquefied hydrocarbon spherical tank protection device includes:

[0071] A tank body protection cover for protecting the tank body 4. The tank body protection cover includes an inner protection layer 1 and an outer protection layer 2 provided on the inner protection layer 1. A plurality of cavities 3 are defined between the inner protection layer 1 and the outer protection layer 2, and the cavities 3 are filled with buffer liquid;

[0072] A fireproof layer is provided on the outer protection layer 2;

[0073] The cross-section of the cavity 3 is trapezoidal, and the bottom length of the trapezoidal cavity 3 close to the tank body 4 is less than the bottom length away from the tank body 4.

[0074] According to some other embodiments of the present invention, the liquefied hydrocarbon spherical tank protection device includes:

[0075] A tank body protection cover for protecting the tank body 4. The tank body protection cover includes an inner protection layer 1 and an outer protection layer 2 provided on the inner protection layer 1. A plurality of cavities 3 are defined between the inner protection layer 1 and the outer protection layer 2, and the cavities 3 are filled with buffer liquid;

[0076] A fireproof layer is provided on the outer protection layer 2;

[0077] The cross-section of the cavity 3 is trapezoidal, and the length of the bottom side of the trapezoidal cavity 3 close to the tank body 4 is less than the length of the bottom side away from the tank body 4;

[0078] The inner protective layer 1 is of a corrugated structure, and the corrugated structure is made of alloy steel.

[0079] According to some other embodiments of the present invention, the liquefied hydrocarbon spherical tank protection device includes:

[0080] A tank body protective cover for protecting the tank body 4. The tank body protective cover includes an inner protective layer 1 and an outer protective layer 2 provided on the inner protective layer 1. A plurality of cavities 3 are defined between the inner protective layer 1 and the outer protective layer 2, and a buffer liquid is filled in the cavities 3;

[0081] A fireproof layer is provided on the outer protective layer 2;

[0082] The cross-section of the cavity 3 is trapezoidal, and the length of the bottom side of the trapezoidal cavity 3 close to the tank body 4 is less than the length of the bottom side away from the tank body 4;

[0083] The inner protective layer 1 is of a corrugated structure, and the corrugated structure is made of alloy steel;

[0084] The outer protective layer 2 is a soft protective layer, and the soft protective layer is made of Kevlar or ultra-high molecular weight polyethylene.

[0085] According to some other embodiments of the present invention, the liquefied hydrocarbon spherical tank protection device includes:

[0086] A tank body protective cover for protecting the tank body 4. The tank body protective cover includes an inner protective layer 1 and an outer protective layer 2 provided on the inner protective layer 1. A plurality of cavities 3 are defined between the inner protective layer 1 and the outer protective layer 2, and a buffer liquid is filled in the cavities 3;

[0087] A fireproof layer is provided on the outer protective layer 2;

[0088] The cross-section of the cavity 3 is trapezoidal, and the length of the bottom side of the trapezoidal cavity 3 close to the tank body 4 is less than the length of the bottom side away from the tank body 4;

[0089] The inner protective layer 1 is of a corrugated structure, and the corrugated structure is made of alloy steel;

[0090] The outer protective layer 2 is a soft protective layer, and the soft protective layer is made of Kevlar or ultra-high molecular weight polyethylene;

[0091] The buffer liquid is water or a shear thickening fluid.

[0092] According to other embodiments of the present invention, the liquefied hydrocarbon spherical tank protection device includes:

[0093] A tank body protective cover for protecting the tank body 4. The tank body protective cover includes an inner protective layer 1 and an outer protective layer 2 provided on the inner protective layer 1. A plurality of cavities 3 are enclosed between the inner protective layer 1 and the outer protective layer 2, and a buffer liquid is filled in the cavities 3;

[0094] A fireproof layer is provided on the outer protective layer 2;

[0095] The cross-section of the cavity 3 is trapezoidal, and the length of the bottom side of the trapezoidal cavity 3 close to the tank body 4 is less than the length of the bottom side far from the tank body 4;

[0096] The inner protective layer 1 is of a corrugated structure, and the corrugated structure is made of alloy steel;

[0097] The outer protective layer 2 is a soft protective layer, and the soft protective layer is made of Kevlar or ultra-high molecular weight polyethylene;

[0098] The buffer liquid is water or a shear thickening fluid;

[0099] The tank body protective cover further includes a pressure relief port for discharging the buffer liquid to a safe area according to the magnitude of the impact force when being impacted.

[0100] According to other embodiments of the present invention, the liquefied hydrocarbon spherical tank protection device includes:

[0101] A tank body protective cover for protecting the tank body 4. The tank body protective cover includes an inner protective layer 1 and an outer protective layer 2 provided on the inner protective layer 1. A plurality of cavities 3 are enclosed between the inner protective layer 1 and the outer protective layer 2, and a buffer liquid is filled in the cavities 3;

[0102] A fireproof layer is provided on the outer protective layer 2;

[0103] The cross-section of the cavity 3 is trapezoidal, and the length of the bottom side of the trapezoidal cavity 3 close to the tank body 4 is less than the length of the bottom side far from the tank body 4;

[0104] The inner protective layer 1 is of a corrugated structure, and the corrugated structure is made of alloy steel;

[0105] The outer protective layer 2 is a soft protective layer, and the soft protective layer is made of Kevlar or ultra-high molecular weight polyethylene;

[0106] The buffer liquid is water or a shear thickening fluid;

[0107] The tank body protective cover further includes a pressure relief port for discharging the buffer liquid to a safe area according to the magnitude of the impact force when being impacted;

[0108] It also includes a spherical tank support column protection structure for protecting the support columns of the spherical tank.

[0109] According to some other embodiments of the present invention, the liquefied hydrocarbon spherical tank protection device includes:

[0110] A tank body protective cover for protecting the tank body 4, the tank body protective cover includes an inner protective layer 1 and an outer protective layer 2 provided on the inner protective layer 1, and a plurality of cavities 3 are defined between the inner protective layer 1 and the outer protective layer 2, and a buffer liquid is filled in the cavities 3;

[0111] A fireproof layer is provided on the outer protective layer 2;

[0112] The cross section of the cavity 3 is trapezoidal, and the length of the bottom side of the trapezoidal cavity 3 close to the tank body 4 is less than the length of the bottom side away from the tank body 4;

[0113] The inner protective layer 1 is of a corrugated structure, and the corrugated structure is made of alloy steel;

[0114] The outer protective layer 2 is a soft protective layer, and the soft protective layer is made of Kevlar or ultra-high molecular weight polyethylene;

[0115] The buffer liquid is water or a shear thickening fluid;

[0116] The tank body protective cover further includes a pressure relief port for discharging the buffer liquid to a safe area according to the magnitude of the impact force when being impacted;

[0117] It also includes a spherical tank support column protection structure for protecting the support columns of the spherical tank;

[0118] The spherical tank support column protection structure is a star-shaped plate;

[0119] The star-shaped plate is made of alloy steel.

[0120] According to some other embodiments of the present invention, the liquefied hydrocarbon spherical tank protection device includes:

[0121] A tank body protective cover for protecting the tank body 4, the tank body protective cover includes an inner protective layer 1 and an outer protective layer 2 provided on the inner protective layer 1, and a plurality of cavities 3 are defined between the inner protective layer 1 and the outer protective layer 2, and a buffer liquid is filled in the cavities 3;

[0122] A fireproof layer is provided on the outer protective layer 2;

[0123] The cross-section of the cavity 3 is trapezoidal, and the length of the bottom side of the trapezoidal cavity 3 close to the tank body 4 is less than the length of the bottom side away from the tank body 4;

[0124] The inner protective layer 1 is of a corrugated structure and is made of alloy steel;

[0125] The outer protective layer 2 is a soft protective layer and is made of Kevlar or ultra-high molecular weight polyethylene;

[0126] The buffer liquid is water or a shear thickening fluid;

[0127] The tank body protective cover further includes a pressure relief port for discharging the buffer liquid to a safe area according to the magnitude of the impact force when being impacted;

[0128] It further includes a spherical tank support column protection structure for protecting the support column of the spherical tank;

[0129] The spherical tank support column protection structure includes a buffer layer and a protective shell arranged on the buffer layer;

[0130] The buffer layer is made of aluminum foam or hard rubber, and the protective shell is made of alloy steel.

[0131] According to some other embodiments of the present invention, the liquefied hydrocarbon spherical tank protection device includes:

[0132] A tank body protective cover for protecting the tank body 4, the tank body protective cover includes an inner protective layer 1 and an outer protective layer 2 arranged on the inner protective layer 1, and a plurality of cavities 3 are enclosed between the inner protective layer 1 and the outer protective layer 2, and a buffer liquid is filled in the cavities 3;

[0133] A fireproof layer is arranged on the outer protective layer 2;

[0134] The cross-section of the cavity 3 is trapezoidal, and the length of the bottom side of the trapezoidal cavity 3 close to the tank body 4 is less than the length of the bottom side away from the tank body 4;

[0135] The inner protective layer 1 is of a corrugated structure and is made of alloy steel;

[0136] The outer protective layer 2 is a soft protective layer and is made of Kevlar or ultra-high molecular weight polyethylene;

[0137] The buffer liquid is water or a shear thickening fluid;

[0138] The tank body protective cover further includes a pressure relief port for discharging the buffer liquid to a safe area according to the magnitude of the impact force when being impacted;

[0139] It also includes a protective structure for the support columns of the spherical tank, which is used to protect the support columns of the spherical tank;

[0140] The protective structure for the support columns of the spherical tank includes a star-shaped plate and a protective shell arranged on the star-shaped plate, and a buffer is filled in the cavity between the star-shaped plate and the protective shell.

[0141] According to some other embodiments of the present invention, the protective device for the liquefied hydrocarbon spherical tank includes:

[0142] A tank body protective cover, which is used to protect the tank body 4. The tank body protective cover includes an inner protective layer 1 and an outer protective layer 2 arranged on the inner protective layer 1. A plurality of cavities 3 are enclosed between the inner protective layer 1 and the outer protective layer 2, and a buffer liquid is filled in the cavities 3;

[0143] A fireproof layer is provided on the outer protective layer 2;

[0144] The cross-section of the cavity 3 is trapezoidal, and the length of the bottom side of the trapezoidal cavity 3 close to the tank body 4 is less than the length of the bottom side away from the tank body 4;

[0145] The inner protective layer 1 is of a corrugated structure, and the corrugated structure is made of alloy steel;

[0146] The outer protective layer 2 is a soft protective layer, and the soft protective layer is made of Kevlar or ultra-high molecular weight polyethylene;

[0147] The buffer liquid is water or a shear thickening fluid;

[0148] The tank body protective cover also includes a pressure relief port, which is used to discharge the buffer liquid to a safe area according to the magnitude of the impact force when being impacted;

[0149] It also includes a protective structure for the support columns of the spherical tank, which is used to protect the support columns of the spherical tank;

[0150] The protective structure for the support columns of the spherical tank includes a star-shaped plate and a protective shell arranged on the star-shaped plate, and a buffer is filled in the cavity between the star-shaped plate and the protective shell;

[0151] Both the star-shaped plate and the protective shell are made of alloy steel, and the buffer is foam aluminum or hard rubber.

[0152] The present invention will be described in detail below through embodiments, but the protection scope of the present invention is not limited thereto.

[0153] Embodiment 1

[0154] Based on the installation location of the liquefied hydrocarbon spherical tank, according to the layout and risk level of the devices around the liquefied hydrocarbon spherical tank, and the local meteorological conditions, the numerical simulation method is used to quantitatively evaluate the potential risks it faces, and the quantitative evaluation results are obtained. Specifically, in the explosion accident, the maximum mass of the flying debris that the storage tank may suffer is 25 kg, and the flying speed is 45 m / s; the peak pressure of the explosion shock wave is 69 kPa, and the positive pressure action time is 20 ms.

[0155] Implement using the liquefied hydrocarbon spherical tank protection device described in the present invention. Specifically, the liquefied hydrocarbon spherical tank protection device includes:

[0156] A tank body protective cover for protecting the tank body 4. The tank body protective cover includes an inner protective layer 1 and an outer protective layer 2 provided on the inner protective layer 1. A plurality of cavities 3 are enclosed between the inner protective layer 1 and the outer protective layer 2, and a buffer liquid is filled in the cavities 3;

[0157] A fireproof layer is provided on the outer protective layer 2.

[0158] In the actual application process, the tank body protective cover is installed on the tank body in a fully enclosed manner.

[0159] After testing, using the liquefied hydrocarbon spherical tank protection device described in the present invention can effectively protect the liquefied hydrocarbon spherical tank, and has the advantages of good protection effect, reusable, high safety and good economic benefits.

[0160] Example 2

[0161] Refer to Example 1 for implementation. The difference is that the cross-section of the cavity 3 is trapezoidal, and the bottom side length of the trapezoidal cavity 3 close to the tank body 4 is less than the bottom side length away from the tank body 4.

[0162] After testing, using the liquefied hydrocarbon spherical tank protection device described in the present invention, compared with the scheme in Example 1, can effectively protect the liquefied hydrocarbon spherical tank, and has the advantages of better protection effect, reusable, higher safety and better economic benefits.

[0163] Example 3

[0164] Refer to Example 2 for implementation. The difference is that the inner protective layer 1 is of a corrugated structure; the corrugated structure is made of alloy steel.

[0165] After testing, using the liquefied hydrocarbon spherical tank protection device described in the present invention, compared with the scheme in Example 2, can effectively protect the liquefied hydrocarbon spherical tank, and has the advantages of better protection effect, reusable, higher safety and better economic benefits.

[0166] Example 4

[0167] It is implemented with reference to Embodiment 3, except that the outer protective layer 2 is a soft protective layer; the soft protective layer is made of Kevlar or ultra-high molecular weight polyethylene.

[0168] After testing, the liquefied hydrocarbon spherical tank protection device of the present invention can effectively protect the liquefied hydrocarbon spherical tank compared with the solution in Embodiment 3, and has the advantages of better protection effect, reusable, higher safety and better economic benefits.

[0169] Embodiment 5

[0170] It is implemented with reference to Embodiment 4, except that the buffer solution is a shear thickening fluid; the tank body protective cover further includes a pressure relief port for discharging the buffer solution to a safe area according to the magnitude of the impact force when being impacted.

[0171] After testing, the liquefied hydrocarbon spherical tank protection device of the present invention can effectively protect the liquefied hydrocarbon spherical tank compared with the solution in Embodiment 4, and has the advantages of better protection effect, reusable, higher safety and better economic benefits.

[0172] Embodiment 6

[0173] It is implemented with reference to Embodiment 5, except that it further includes a spherical tank support column protection structure for protecting the support column of the spherical tank; the spherical tank support column protection structure is a star-shaped plate; the star-shaped plate is made of alloy steel.

[0174] In the actual application process, the spherical tank support column protection structure is installed on the support column in a fully enclosed manner.

[0175] After testing, the liquefied hydrocarbon spherical tank protection device of the present invention can effectively protect the liquefied hydrocarbon spherical tank compared with the solution in Embodiment 5, and has the advantages of better protection effect, reusable, higher safety and better economic benefits.

[0176] Embodiment 7

[0177] It is implemented with reference to Embodiment 5, except that the maximum mass of the flying debris that the storage tank may suffer in an explosion accident is 55 kg; it further includes a spherical tank support column protection structure for protecting the support column of the spherical tank; the spherical tank support column protection structure includes a buffer layer and a protective shell arranged on the buffer layer; the buffer layer is made of foam aluminum or hard rubber, and the protective shell is made of alloy steel.

[0178] In the actual application process, the spherical tank support column protection structure is installed on the support column in a fully enclosed manner.

[0179] After testing, by using the liquefied hydrocarbon spherical tank protection device of the present invention, compared with the solution in Example 5, it can effectively protect the liquefied hydrocarbon spherical tank, and has the advantages of better protection effect, reusable, higher safety and better economic benefits.

[0180] Example 8

[0181] Implemented with reference to Example 5, the difference is that the maximum mass of the flying debris that the storage tank may be subjected to in an explosion accident is 115 kg; it also includes a protection structure for the support columns of the spherical tank to protect the support columns of the spherical tank; the protection structure for the support columns of the spherical tank includes a star-shaped plate and a protective shell provided on the star-shaped plate, and a buffer is filled in the cavity between the star-shaped plate and the protective shell; both the star-shaped plate and the protective shell are made of alloy steel, and the buffer is aluminum foam or hard rubber.

[0182] In the actual application process, the protection structure of the spherical tank support column is installed on the support column in a fully enclosed manner.

[0183] After testing, by using the liquefied hydrocarbon spherical tank protection device of the present invention, compared with the solution in Example 5, it can effectively protect the liquefied hydrocarbon spherical tank, and has the advantages of better protection effect, reusable, higher safety and better economic benefits.

[0184] Example 9

[0185] Implemented with reference to Example 7, the difference is that the maximum mass of the flying debris that the storage tank may be subjected to in an explosion accident is 80 kg.

[0186] After testing, by using the liquefied hydrocarbon spherical tank protection device of the present invention, it can effectively protect the liquefied hydrocarbon spherical tank, and has the advantages of good protection effect, reusable, high safety and good economic benefits.

[0187] Example 10

[0188] Implemented with reference to Example 8, the difference is that the maximum mass of the flying debris that the storage tank may be subjected to in an explosion accident is 135 kg.

[0189] After testing, by using the liquefied hydrocarbon spherical tank protection device of the present invention, it can effectively protect the liquefied hydrocarbon spherical tank, and has the advantages of good protection effect, reusable, high safety and good economic benefits.

[0190] The liquefied hydrocarbon spherical tank protection device and its design method provided by the present invention can effectively ensure the safety of the spherical tank by using the tank body protective cover to protect the tank body and using the protection structure of the spherical tank support column to protect the support column, prevent the flying debris from directly impacting the spherical tank, resulting in the damage or collapse of the spherical tank, and has the advantages of simple operation, simple structure, high safety and cost saving.

[0191] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention. To avoid unnecessary repetition, the present invention will not separately describe various possible combinations. However, these simple modifications and combinations should also be regarded as the content disclosed by the present invention and all fall within the protection scope of the present invention.

Claims

1. A protection device for a liquefied hydrocarbon spherical tank, characterized in that, The liquefied hydrocarbon spherical tank protection device includes: A tank body protective cover for protecting the tank body (4). The tank body protective cover includes an inner protective layer (1) and an outer protective layer (2) provided on the inner protective layer (1). A number of cavities (3) are enclosed between the inner protective layer (1) and the outer protective layer (2), and a buffer liquid is filled in the cavities (3).

2. The liquefied hydrocarbon spherical tank protection device according to claim 1, characterized in that, The cross-section of the cavity (3) is trapezoidal, and the length of the bottom side of the trapezoidal cavity (3) close to the tank body (4) is less than the length of the bottom side away from the tank body (4).

3. The liquefied hydrocarbon spherical tank protection device according to claim 1, characterized in that, The inner protective layer (1) is of a corrugated structure, and the corrugated structure is made of alloy steel.

4. The liquefied hydrocarbon spherical tank protection device according to any one of claims 1-3, characterized in that, The outer protective layer (2) is a soft protective layer, and the soft protective layer is made of Kevlar or ultra-high molecular weight polyethylene.

5. The liquefied hydrocarbon spherical tank protection device according to claim 1, characterized in that The buffer liquid is water or a shear thickening fluid.

6. The protection device for a liquefied hydrocarbon spherical tank according to claim 1 or 5, characterized in that, The tank body protective cover further includes a pressure relief port for discharging the buffer liquid to a safe area according to the magnitude of the impact force when being impacted.

7. The liquefied hydrocarbon spherical tank protection device according to claim 1, characterized in that, It further includes a spherical tank support column protection structure for protecting the support column of the spherical tank.

8. The protection device for a liquefied hydrocarbon spherical tank according to claim 7, characterized in that, The spherical tank support column protection structure is a star-shaped plate.

9. The liquefied hydrocarbon spherical tank protection device according to claim 8, characterized in that The star-shaped plate is made of alloy steel.

10. The protection device for a liquefied hydrocarbon spherical tank according to claim 7, characterized in that, The spherical tank support column protection structure includes a buffer layer and a protective shell provided on the buffer layer.

11. The liquefied hydrocarbon spherical tank protection device according to claim 10, characterized in that, The buffer layer is made of aluminum foam or hard rubber, and the protective shell is made of alloy steel.

12. The protection device for a liquefied hydrocarbon spherical tank according to claim 7, wherein, The spherical tank support column protection structure includes a star-shaped plate and a protective shell provided on the star-shaped plate. A buffer material is filled in the cavity between the star-shaped plate and the protective shell.

13. The protection device for a liquefied hydrocarbon spherical tank according to claim 12, wherein, Both the star-shaped plate and the protective shell are made of alloy steel, and the buffer material is aluminum foam or hard rubber.

14. The liquefied hydrocarbon spherical tank protection device according to claim 1, wherein A fireproof layer is provided on the outer protective layer (2).

15. A design method for a protective device of a liquefied hydrocarbon spherical tank, characterized in that, Applied to the liquefied hydrocarbon spherical tank protection device according to any one of claims 1-6, the design method includes: Based on the installation position of the liquefied hydrocarbon spherical tank, quantitatively evaluate the risks it faces and obtain the quantitative evaluation result; Determine the length of the bottom side of the trapezoidal cavity (3) according to the quantitative evaluation result.

16. The design method of the protection device for the liquefied hydrocarbon spherical tank according to claim 15, characterized in that, The quantitative evaluation of the risks it faces specifically includes: According to the layout and risk level of the devices around the liquefied hydrocarbon spherical tank and the local meteorological conditions, use the numerical simulation method to quantitatively evaluate the risks it faces.

17. The design method of the protection device for a liquefied hydrocarbon spherical tank according to claim 15, wherein The quantitative evaluation result includes the impact force of the splashes, and the length of the bottom side of the trapezoidal cavity (3) is inversely proportional to the impact force of the splashes.

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