阅读说明：本技术 一种低温液体贮运容器 (Low-temperature liquid storage and transportation container ) 是由 江蓉 程香 肖赞山 严磊 李亮 祁珂 吴华飞 李自飞 罗飞 于 2021-07-16 设计创作，主要内容包括：本发明提供了一种低温液体贮运容器,以解决现有贮运容器贮运低温液体时易出现温度分层现象、气化损失大等问题。该容器包括：罐体,所述罐体包括内壳体和外壳体；多个导热件,间隔设置于所述内壳体内；其中,所述导热件由金属导热材料制成,与所述内壳体内壁连接。该容器内贮运的低温液体温度分布均匀,蒸发损失小,容器的使用性能良好,安全性高。(The invention provides a low-temperature liquid storage and transportation container, which aims to solve the problems that the existing storage and transportation container is easy to generate temperature stratification phenomenon and has large gasification loss when storing and transporting low-temperature liquid. The container includes: a tank comprising an inner shell and an outer shell; a plurality of heat conducting members arranged at intervals in the inner shell; the heat conducting piece is made of metal heat conducting materials and is connected with the inner wall of the inner shell. The low-temperature liquid stored and transported in the container has uniform temperature distribution, small evaporation loss, good use performance of the container and high safety.)

1. A cryogenic liquid storage and transport vessel comprising:

the tank body comprises an inner shell (2) and an outer shell (1);

a plurality of heat conducting members (3) arranged at intervals in the inner shell (2);

the heat conducting piece (3) is made of metal heat conducting materials and is connected with the inner wall of the inner shell (2).

2. A cryogenic liquid storage and transport vessel according to claim 1, wherein the heat conducting member (3) comprises a plurality of ribs (31) evenly distributed along the circumference of the tank, each rib (31) having one end connected to the inner wall of the inner shell (2) and the other end extending towards the middle region of the inner shell (2).

3. A cryogenic liquid storage and transport vessel according to claim 1, wherein the heat conducting member (3) is a grid-like structure of a plurality of ribs (31) connected to each other, the outer edge of the grid-like structure being connected to the inner wall of the inner shell (2).

4. The cryogenic liquid storage and transportation vessel of claim 1, wherein a pressurization port (13) is formed in the upper portion of the tank body, a pressurization conduit (131) is connected to the pressurization port (13), and the pressurization conduit (131) is located in the tank body and extends downwards along the central axis of the tank body.

5. Cryogenic liquid storage and transport vessel according to claim 4, characterized in that the heat conducting member (3) is connected to the outer wall of the pressurization conduit (131).

6. Cryogenic liquid storage and transport vessel according to any of claims 2, 3 or 5, characterized in that the ribs (31) of the heat conducting member (3) are constituted by a section bar having an I-shaped cross section.

7. Cryogenic liquid storage and transport vessel according to claim 1, characterized in that the heat conducting element (3) is made of aluminium, copper or stainless steel material.

8. A cryogenic liquid storage and transport vessel according to claim 1, wherein a temperature sensor (32) is mounted on the thermally conductive member (3).

9. A cryogenic liquid storage and transportation vessel according to claim 1, wherein a vacuum layer is arranged between the inner shell (2) and the outer shell (1), a multi-layer vacuum insulation quilt (21) is arranged in the vacuum layer, and the multi-layer vacuum insulation quilt (21) covers the outer wall surface of the inner shell (2).

10. A cryogenic liquid storage and transport vessel according to claim 1 or 9 wherein the tank is any one of a vertical tank, a horizontal tank or a vehicle tank.

Technical Field

The invention belongs to the technical field of low-temperature liquid storage and transportation equipment, and particularly relates to a low-temperature liquid storage and transportation container.

Background

Low-temperature liquid such as liquid hydrogen, liquid helium, liquid nitrogen, liquid oxygen and the like consumes a large amount of energy in the liquefaction process, and has important function and significance in reducing gasification loss in the storage and transportation processes. Taking liquid hydrogen as an example, hydrogen energy is an important carrier for constructing a multi-energy supply system mainly based on clean energy, and with the rapid development of hydrogen energy application in China, the fields of hydrogen production, hydrogen liquefaction, hydrogen storage, hydrogen transportation, hydrogen utilization and the like are rapidly and deeply developed. The liquefaction of the hydrogen consumes a large amount of energy, and the reduction of the gasification loss of the liquid hydrogen in the hydrogen storage and hydrogen transportation processes has a positive promoting effect on the development of hydrogen energy.

In both the powder heat-insulated cryogenic container and the multilayer heat-insulated cryogenic container, heat transferred from the external environment to the outer tank or part of the heat transferred from the external environment to the inner surface of the inner tank is transferred through heat conduction, convection and radiation, so that the cryogenic liquid (such as liquid hydrogen) is heated and gasified. Liquid hydrogen is heated and gasified, so that the temperature stratification phenomenon is easy to occur, further the evaporation loss is increased, the output quality of the liquid hydrogen is influenced, even under the Manani effect, the liquid hydrogen is evaporated suddenly, the service performance of a storage tank is deteriorated, and the rapid air pillow pressure rise is formed, so that the potential safety hazard is caused.

Disclosure of Invention

Aiming at the temperature stratification phenomenon existing in the existing low-temperature container during the storage and transportation of low-temperature liquid, the invention provides the low-temperature liquid storage and transportation container, the temperature distribution of the low-temperature liquid stored and transported in the container is uniform, the evaporation loss is less, the service performance of the container is good, and the safety is high.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a cryogenic liquid storage and transport vessel comprising:

a tank comprising an inner shell and an outer shell;

a plurality of heat conducting members arranged at intervals in the inner shell;

the heat conducting piece is made of metal heat conducting materials and is connected with the inner wall of the inner shell.

In an embodiment of the present application, the heat conducting member includes a plurality of ribs uniformly distributed along a circumferential direction, and one end of each of the ribs is connected to the inner wall of the inner housing, and the other end extends toward the middle region of the inner housing.

In an embodiment of the present application, the heat conducting member is a grid structure formed by connecting a plurality of ribs, and an outer edge of the grid structure is connected to an inner wall of the inner housing.

In an embodiment of this application, the upper portion of the jar body is equipped with the pressure boost mouth, the pressure boost mouth is connected with the pressure boost pipe, the pressure boost pipe is located the jar is internal, follows the axis downwardly extending of the jar body.

In one embodiment of the present application, the heat-conducting member is connected to an outer wall of the pressure-increasing conduit.

In one embodiment of the present application, the ribs of the heat conducting member are formed of a profile having an i-shaped cross section.

In one embodiment of the present application, the heat conductive member is made of aluminum, copper, or stainless steel material.

In one embodiment of the present application, the heat-conducting member has a temperature sensor mounted thereon.

In an embodiment of the present application, a vacuum layer is disposed between the inner casing and the outer casing, and a multi-layer vacuum insulation cover is disposed in the vacuum layer and covers the outer wall surface of the inner casing.

In one embodiment of the present application, the tank is any one of a vertical tank, a horizontal tank, or a vehicle tank.

Compared with the prior art, the invention has the beneficial effects that:

1. the low-temperature liquid storage and transportation container has the advantages that the tank body is divided into the inner shell and the outer shell, and the low-temperature liquid storage and transportation container has a heat insulation effect; the interval equipartition sets up the heat conduction piece in the inner shell, and the heat conduction piece is connected with interior inner wall of the shell, can with leak into the heat homodisperse on the inner wall of the inner shell and conduct to cryogenic liquids inside, make the cryogenic liquids bulk temperature distribution of filling even, temperature stratification phenomenon and formation heat liquid layer can not appear, reduce cryogenic liquids's gasification loss, guarantee cryogenic liquids product's output quality, avoid causing jar internal gas pressure sharply because of the manaco effect on, cause the incident. The low-temperature liquid stored and transported in the storage and transportation container has uniform temperature distribution, less evaporation loss, good use performance of the container and high safety.

2. Set up the pressure boost pipe, heat-conducting member and pressure boost pipe connection can be with the low temperature liquid layer of heat evenly distributed to different positions that external pressure boost gas brought into when the pressure boost, ensure that the temperature of each position of low temperature liquid is the same, avoid appearing temperature layering phenomenon.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic overall sectional structure diagram of an embodiment of the present invention.

FIG. 2 is a schematic sectional view taken along the direction A-A in FIG. 1 according to the present invention.

FIG. 3 is a schematic sectional view along the direction B-B in FIG. 1 according to the present invention.

Fig. 4 is an enlarged schematic structural view of the portion C in fig. 1 according to the present invention.

Fig. 5 is a schematic structural view of a heat-conducting member according to another embodiment of the present invention.

Reference numerals:

1. an outer housing; 11. a liquid inlet and outlet; 12. a vent port; 13. a pressurizing port; 131. a pressurization conduit; 2. an inner housing; 21. a multi-layer vacuum heat insulation quilt; 3. a heat conductive member; 31. a rib; 32. a temperature sensor.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientation or positional relationship conventionally used in the use of the products of the present invention, or the orientation or positional relationship conventionally understood by those skilled in the art, are merely for convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

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

As shown in fig. 1, the embodiment of the present invention provides a cryogenic liquid storage and transportation container which can be used for storing and transporting cryogenic liquids such as liquid hydrogen, liquid helium, liquid nitrogen and liquid oxygen. Comprises a tank body and a plurality of heat-conducting pieces 3 arranged in the tank body.

The tank body comprises an inner shell 2 and an outer shell 1 sleeved outside the inner shell 2. A sealed vacuum layer is arranged between the inner shell 2 and the outer shell 1, so that the heat insulation effect is achieved, the evaporation loss of low-temperature liquid in the tank body is effectively reduced, and the normal storage and transportation of the low-temperature liquid are guaranteed.

The heat conducting member 3 is located in the inner housing 2 and connected to the inner wall of the inner housing 2 for heat transfer. The heat conducting member 3 may be made of a metal heat conducting material having high heat conductivity, such as aluminum, copper, or stainless steel. The heat conduction piece 3 is including a plurality of, the interval equipartition is in interior casing 2, with interior casing 2's inner wall zonulae occludens, can be with the heat conduction on the 2 inner walls of interior casing to 2 internal cavity regions of interior casing, with the low temperature liquid contact of filling, make the even conduction of heat on the 2 inner walls of interior casing give low temperature liquid, avoid low temperature liquid at jar internal temperature distribution inhomogeneous, cause the temperature stratification phenomenon, influence the output quality of low temperature liquid and the safety performance of storage and transportation container.

The heat-conducting member 3 may have various structures, and functions to rapidly conduct heat on the inner wall of the inner housing 2 to the interior of the stored and transported cryogenic liquid, so that the temperature distribution of the cryogenic liquid is more uniform.

In one embodiment, the multiple layers of heat conducting members 3 are uniformly distributed in the tank body; each layer of heat conducting member 3 comprises a plurality of ribs 31, the plurality of ribs 31 are uniformly distributed along the circumferential direction, one end of each rib 31 is connected with the inner wall of the inner shell 2, and the other end of each rib 31 extends towards the middle area of the inner shell 2. The heat on the inner wall of the inner shell 2 can be uniformly conducted to the inner area of the tank body in time to exchange heat with the stored and transported low-temperature liquid, so that the temperature distribution of all parts of the low-temperature liquid is more uniform, and the phenomenon of temperature stratification is avoided.

In another embodiment, the multiple layers of heat-conducting members 3 are uniformly distributed along the height direction of the tank body; the multi-layer heat conducting member 3 is a grid structure formed by a plurality of ribs 31 which are connected in a staggered manner, and the outer edge of the grid structure of the heat conducting member 3 is connected with the inner wall of the inner shell 2 for heat conduction. The heat on the inner wall of the inner shell 2 can be uniformly conducted to the inner area of the tank body in time to exchange heat with the stored and transported low-temperature liquid, so that the temperature distribution of all parts of the low-temperature liquid is more uniform, and the phenomenon of temperature stratification is avoided.

The tank body can be any one of a vertical storage tank, a horizontal storage tank, an automobile storage tank and the like.

In one embodiment as shown in fig. 1, the tank is a vertical storage tank, lifting lugs are arranged on the tank for lifting, and supporting legs are arranged on the tank for placing and fixing the tank. The lower part of the tank body is provided with a liquid inlet and outlet 11, and the upper part is provided with a vent 12 and a pressurizing port 13.

When filling low-temperature liquid, the external liquid conveying pipe is connected with the liquid outlet 2, and the low-temperature liquid (such as liquid hydrogen) enters the tank body from the liquid inlet and outlet 11 at the lower part. The evaporated gas (such as hydrogen) is discharged through a vent 12 at the upper part, a pressure relief device is installed on the vent 12, when the pressure in the tank body exceeds a preset value, the gas is automatically discharged for pressure relief, and when the pressure is smaller than the preset value, the vent 12 is automatically closed.

When the low-temperature liquid is output, the external liquid conveying pipe is connected with the liquid inlet and outlet 11, and the low-temperature liquid can be directly discharged by gravity at a high liquid level; when the liquid level is low or higher liquid discharge pressure is needed, pressurized gas (such as hydrogen) can be introduced into the tank body through the pressurizing port 13, so that the pressure in the tank body is increased, and the discharge of low-temperature liquid is accelerated.

The pressurizing port 13 is connected with a pressurizing conduit 131 on the inner side of the tank body, the pressurizing conduit 131 is located on the central axis in the tank body and extends downwards to the lower part in the tank body along the central axis, introduced pressurizing gas can be guided to the lower part of the tank body, and hot gas is prevented from directly staying at the top of liquid to cause a local hot liquid layer.

In a further embodiment, as shown in fig. 1 and 2, the heat-conducting member 3 has a radial structure with ribs 31 uniformly distributed along the circumferential direction, and each rib 31 has one end connected to the inner wall of the inner housing 2 and the other end extending toward the middle to be connected to the outer wall of the supercharging conduit 131. The heat on the inner wall of the inner shell 2 and the heat carried by the pressurized gas when the pressurized gas is guided into the pressurized gas by the pressurized conduit 131 can be uniformly conducted to the inner area of the tank body to exchange heat with the stored and transported low-temperature liquid in time, so that the temperature distribution of all parts of the low-temperature liquid is more uniform, and the phenomenon of temperature stratification is avoided.

In another further embodiment, as shown in fig. 5, a part of the ribs 31 of the heat conducting member 3 in a grid-like structure is also connected to the outer wall of the pressurization duct 131 for heat transfer. I.e. the heat conducting member 3 connects the inner wall of the inner housing 2 and the outer wall of the middle pressurizing conduit 131. The realization is with the heat on the 2 inner walls of interior casing to and the heat that the pressurized gas carried when the leading-in pressurized gas of pressure boost pipe 131, timely even conduction to jar internal region and the low temperature liquid heat transfer of storage fortune, make the temperature distribution of each position of low temperature liquid more even, avoid appearing the temperature stratification phenomenon.

As shown in fig. 1 and 3, in one embodiment, the ribs 31 of the heat-conducting member are formed by a section bar having an i-shaped cross section. And the ribs 31 of the heat conducting member 3 are made of metal materials with good heat conducting property, such as aluminum, copper or stainless steel. The I-shaped metal section has large surface area and excellent heat conducting performance, so that heat on the inner wall of the inner shell 2 can be timely guided and dispersed into the stored and transported low-temperature liquid, and the temperature in the low-temperature liquid is uniformly distributed.

As shown in fig. 1 and 4, a plurality of temperature sensors 32 are mounted on the heat conducting member 3 at different positions, and the temperature sensors 32 may be platinum thermistor temperature sensors for detecting the temperature of the cryogenic liquid at various positions, so as to better judge whether the cryogenic liquid stored and transported in the tank body has a temperature stratification phenomenon, so as to take corresponding measures to increase the safety of the storage and transportation process.

As shown in fig. 1 to 2 and 4 to 5, a vacuum layer is arranged between the inner shell 2 and the outer shell 1 of the tank body, a multi-layer vacuum insulation cover 21 is arranged in the vacuum layer, and the multi-layer vacuum insulation cover 21 covers the outer side of the inner shell 2. The multilayer vacuum heat insulation quilt 21 can be made of materials such as silicon dioxide and glass fiber, has the functions of heat insulation and heat preservation, reduces heat transfer, prevents low-temperature liquid in the tank body from being gasified and evaporated, and ensures normal storage and transportation of the low-temperature liquid.

The tank body can be designed into a vertical storage tank, a horizontal storage tank or a vehicle storage tank according to actual needs, and has wide application range and strong applicability.

The interior of the traditional storage and transportation container is of a hollow structure, liquid close to the inner wall of the inner shell is mainly heated and gasified, and the gasification amount is large. Because the latent heat of low-temperature liquid such as liquid hydrogen, liquid helium, liquid nitrogen, liquid oxygen and the like is small, gas generated by the temperature rise of the solution close to the inner wall of the inner shell moves upwards along the inner wall of the inner shell under the action of buoyancy, and the temperature of the liquid in the central area of the tank body is basically unchanged, so that a temperature gradient, namely a temperature stratification phenomenon, is formed in the height direction of the tank body. The phenomenon of temperature stratification can cause the upper layer of low-temperature liquid in the tank body to form a hot liquid layer, so that evaporation loss is increased, the output quality of low-temperature liquid products and the use performance of a storage and transportation container are affected, even under the Marangoni effect, the low-temperature liquid is evaporated suddenly, the gas pressure in the container is increased rapidly, and safety accidents are caused.

According to the low-temperature liquid storage and transportation container, the inner shell 2, the outer shell 1 and the multilayer vacuum heat insulation cover 21 are arranged on the tank body, so that the heat insulation effect is good, and the gasification loss can be reduced; the interval equipartition sets up heat conduction piece 3 in the interior casing 2, heat conduction piece 3 and 2 inner wall connection of interior casing, will leak into the heat homodisperse on the 2 inner walls of interior casing and conduct to cryogenic liquids inside, make the whole temperature distribution of cryogenic liquids of filling even, temperature stratification phenomenon and hydrothermal solution layer can not appear, can effectively reduce cryogenic liquids's gasification loss, guarantee the output quality of cryogenic liquids product, avoid causing jar internal gas pressure sharply because of the mangani effect on, cause the incident. The low-temperature liquid stored and transported in the storage and transportation container has uniform temperature distribution, less evaporation loss, good use performance of the container and high safety.