CN216202461U - Cooling and pressure stabilizing device of natural gas storage tank - Google Patents
Cooling and pressure stabilizing device of natural gas storage tank Download PDFInfo
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- CN216202461U CN216202461U CN202122441460.6U CN202122441460U CN216202461U CN 216202461 U CN216202461 U CN 216202461U CN 202122441460 U CN202122441460 U CN 202122441460U CN 216202461 U CN216202461 U CN 216202461U
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Abstract
The utility model provides a cooling and pressure stabilizing device of a natural gas storage tank, which comprises the natural gas storage tank, a heat-insulating shell and a heat-insulating layer; the natural gas storage tank is externally wrapped with a heat-insulating shell; the heat insulation layer is arranged inside the heat insulation shell and connected with the heat insulation shell in an embedding mode; the inlet is arranged at the left end of the natural gas storage tank and is connected with the natural gas storage tank in a welding mode; the outlet is arranged at the right end of the natural gas storage tank and is connected with the natural gas storage tank in a welding mode; the condensation pipeline is arranged between the inlet and the outlet, and the condensation pipeline is connected with the inlet and the outlet in a welding mode. Through the improvement structurally, it is effectual to have the cooling, improves steady voltage effect greatly, makes it possess advantages such as practicality and practical value more to the effectual problem and the not enough that appear in having solved current device.
Description
Technical Field
The utility model relates to the technical field of natural gas storage tanks, in particular to a cooling and pressure stabilizing device of a natural gas storage tank.
Background
In the use of liquefied natural gas storage tank, because liquefied natural gas storage tank is along with the time extension of use, can follow the atmosphere and absorb heat to make liquefied natural gas vaporize for BOG gas (evaporating gas or gaseous natural gas promptly), thereby lead to the pressure rise in the liquefied natural gas storage tank, produce the potential safety hazard.
In view of the above problems, the current solutions mainly include the following four types: (1) directly discharging BOG gas, and burning the BOG gas on site to reduce the pressure in the liquefied natural gas storage tank; (2) directly merging BOG gas into a pipe network for use; (3) guiding out the BOG gas, pressurizing and liquefying the BOG gas, and then refilling the BOG gas into the liquefied natural gas storage tank; (4) the structure of the liquefied natural gas storage tank is improved, so that the liquefied natural gas storage tank can bear high pressure.
The BOG gas is directly used as fuel in the technology (1) and the technology (2), wherein the technology (1) is used on site, the equipment requirement is very simple, and the domestic gas of the liquefied natural gas station can be saved. In the technology (2), the peak regulation and valley compensation can be realized by accessing the gas supply pipeline and releasing the gas regularly, but the requirement on pipe network control operation is high.
Although the two technologies can primarily solve the problem of the safety hazard, the two technologies have the following defects: the BOG gas is directly combusted, which breaks the aim of storing the liquefied natural gas per se and is not suitable for the liquefied natural gas storage tank which needs to be stored for a long time.
The technology (3) is characterized in that a nitrogen circulation system is externally connected outside the liquefied natural gas storage tank, gasified BOG gas is guided out and condensed by the nitrogen circulation system to be changed into a low-temperature and low-pressure liquefied natural gas storage tank to flow back to the liquefied natural gas storage tank, the operation cost of the technology is low, the investment cost is high, and in order to enable the energy to be absorbed more, the heat exchange step often needs to pass through a complex circuit, so that the design and manufacturing difficulty is caused.
In view of the above, it is desirable to provide a cooling device for a natural gas storage tank to prevent liquefied natural gas from vaporizing due to the temperature increase of the natural gas storage tank.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a temperature and pressure reduction device for a natural gas storage tank, which aims to solve the problems and the defects in the background technology.
In order to achieve the purpose, the utility model provides a cooling and pressure stabilizing device of a natural gas storage tank, which comprises the natural gas storage tank, a heat insulation shell, a heat insulation layer, a condensation pipeline, a first pipeline, a second pipeline and a refrigerating device, wherein the heat insulation shell is arranged on the natural gas storage tank; the outside parcel of natural gas storage tank has the heat preservation casing.
And a heat insulation layer is also arranged in the heat insulation shell, and the heat insulation layer is connected with the heat insulation shell in an embedding mode.
The one end of natural gas storage tank is provided with the import, the other end of natural gas storage tank is provided with the export, natural gas storage tank in be provided with the condensation duct, just the condensation duct be linked together with the import and the export at natural gas storage tank both ends.
The first pipeline is arranged between the inlet and the refrigerating device and fixedly connected with the inlet and the refrigerating device through bolts; the second pipeline is arranged between the outlet and the refrigerating device and is fixedly connected with the outlet and the refrigerating device through bolts; the refrigerating device is fixedly arranged on one side of the natural gas storage tank.
Preferably, the heat-insulating shell is a capsule-shaped shell made of ceramic fiber materials, and the interior of the heat-insulating shell is of a hollow structure.
Preferably, the heat insulation layer is a layer of heat insulation cotton felt embedded in the heat insulation shell.
Preferably, the condensation pipeline is a spiral stainless steel pipe, and the condensation pipeline is fixedly arranged at the middle position inside the natural gas storage tank through an inlet and an outlet.
Preferably, an outlet of the refrigeration device is connected to the first duct, and an inlet of the refrigeration device is connected to the second duct.
Preferably, the first pipeline and the second pipeline are also provided with corresponding control valve bodies, and the on-off of the first pipeline and the second pipeline is controlled through the control valve bodies.
The utility model has the beneficial effects that:
1. the natural gas storage tank is cooled by the cold air through the condensing pipeline in the high-temperature environment through the refrigerating device, so that the vaporized natural gas is cooled and liquefied;
2. according to the natural gas storage tank, the heat insulation shell is wrapped outside the natural gas storage tank, and the heat insulation layer is arranged in the heat insulation shell, so that the problem that the natural gas storage tank is exposed to the sun and absorbs heat to cause overhigh temperature and influence on air pressure can be avoided, and the cooling effect of the device is greatly improved;
4. the utility model increases the contact area of the vaporized natural gas and the condensation pipeline through the spiral structure condensation pipe, thereby increasing the liquefaction efficiency.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic diagram of the structure of the apparatus of the present invention;
FIG. 2 is a schematic cross-sectional view of the insulated housing of the present invention;
fig. 3 is a schematic structural diagram of a condensation duct according to the present invention.
In the figure: the natural gas refrigeration system comprises a natural gas storage tank 1, a heat preservation shell 2, a heat insulation layer 3, an inlet 4, an outlet 5, a condensation pipeline 6, a first pipeline 7, a second pipeline 8 and a refrigeration device 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
It is to be noted that, in the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the utility model.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Meanwhile, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, for example, as being fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or electrical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, the present embodiment provides a cooling and pressure stabilizing device for a natural gas storage tank, which includes a natural gas storage tank 1, a heat insulation casing 2, a heat insulation layer 3, an inlet 4, an outlet 5, a condensation pipeline 6, a first pipeline 7, a second pipeline 8, and a refrigerating device 9. In the embodiment, the natural gas storage tank 1 is externally wrapped with a heat-insulating shell 2; the heat insulation shell 2 is internally provided with a heat insulation layer 3, and the heat insulation layer 3 is connected with the heat insulation shell 2 in an embedding mode.
In addition, in this embodiment, an inlet 4 is disposed at the left end of the natural gas storage tank 1, and an outlet 5 is disposed at the right end of the natural gas storage tank 1.
In the embodiment, the condensation pipeline 6 is arranged in the natural gas storage tank 1, two ends of the condensation pipeline 6 are respectively communicated with the inlet 4 and the outlet 5 of the natural gas storage tank 1, and the inlet 4 is communicated with the refrigerating device 9 through the first pipeline 7. The outlet 5 is communicated with a refrigerating device 9 through a second pipeline 8, and the refrigerating device 9 is fixedly arranged on one side of the natural gas storage tank 1. The present embodiment liquefies the vaporized natural gas by feeding the cooling medium of the refrigeration device 9 into the condensation duct 6.
Preferably, the condensation duct 6 is a stainless steel tube arranged in a spiral or serpentine structure.
In addition, the refrigerating device 9 in the present embodiment may be a liquid nitrogen generator by feeding liquid nitrogen as a cooling medium into the condensing duct 6.
The refrigerating device 9 comprises a refrigerating machine and a liquid storage tank, the refrigerating machine is used for providing cooling liquid for the liquid storage tank, the liquid storage tank is used for storing the cooling liquid, the liquid storage tank injects a refrigerant into a condensing pipeline 6 which is arranged in a spiral or serpentine structure through a first pipeline 7, the condensing pipeline 6 which is arranged in the spiral or serpentine structure inputs the cooling liquid after heat exchange into the refrigerant through a second pipeline 8 for refrigeration, and then the cooling liquid is stored in the liquid storage tank.
Preferably, in this embodiment, the thermal insulation casing 2 is in a capsule shape made of a ceramic fiber material, and the interior of the thermal insulation casing 2 is a hollow structure, so that the natural gas storage tank 1 can be prevented from being exposed to the sun through the thermal insulation casing 2, and the temperature of the natural gas storage tank 1 is reduced.
Preferably, the heat insulation layer 3 is a layer of heat insulation cotton felt embedded inside the heat insulation shell 2, and the heat insulation layer 2 can block the natural gas storage tank 1 from absorbing heat.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A cooling and pressure stabilizing device of a natural gas storage tank comprises: the natural gas storage tank comprises a natural gas storage tank (1), a heat insulation shell (2), a heat insulation layer (3), a condensation pipeline (6), a first pipeline (7), a second pipeline (8) and a refrigerating device (9); the method is characterized in that: the natural gas storage tank (1) is externally wrapped with a heat-insulating shell (2); a heat insulation layer (3) is also arranged in the heat insulation shell (2), and the heat insulation layer (3) is connected with the heat insulation shell (2) in an embedding manner;
a condensing pipeline (6) is also arranged in the natural gas storage tank (1), and two ends of the condensing pipeline (6) are respectively communicated with an inlet (4) and an outlet (5) which are arranged at two ends of the natural gas storage tank (1);
the inlet (4) and the outlet (5) are also communicated with a refrigerating device (9) through a first pipeline (7) and a second pipeline (8) respectively.
2. The cooling and pressure stabilizing device of the natural gas storage tank as claimed in claim 1, characterized in that: the heat-insulating shell (2) is a capsule-shaped shell made of ceramic fiber materials, and the interior of the heat-insulating shell (2) is of a hollow structure.
3. The cooling and pressure stabilizing device of the natural gas storage tank as claimed in claim 1, characterized in that: the heat insulation layer (3) is a layer of heat insulation cotton felt embedded in the heat insulation shell (2).
4. The cooling and pressure stabilizing device of the natural gas storage tank as claimed in claim 1, characterized in that: the condensing pipeline (6) is a stainless steel pipe which is arranged in a spiral or snake-shaped structure, and the condensing pipeline (6) is fixedly arranged in the middle of the interior of the natural gas storage tank (1) through an inlet (4) and an outlet (5).
5. The cooling and pressure stabilizing device of the natural gas storage tank as claimed in claim 1, characterized in that: the outlet of the refrigerating device (9) is communicated with the first pipeline (7), and the inlet of the refrigerating device (9) is communicated with the second pipeline (8).
6. The cooling and pressure stabilizing device of the natural gas storage tank as claimed in claim 1, characterized in that: and corresponding control valve bodies are also arranged on the first pipeline (7) and the second pipeline (8).
7. The cooling and pressure stabilizing device of the natural gas storage tank as claimed in claim 1, characterized in that: the refrigerating device (9) comprises a refrigerating machine and a liquid storage tank, the refrigerating machine is used for providing cooling liquid for the liquid storage tank, the liquid storage tank is used for storing the cooling liquid, the liquid storage tank injects the cooling liquid into a condensing pipeline (6) which is arranged in a spiral or snake-shaped structure through a first pipeline (7), and the condensing pipeline (6) which is arranged in the spiral or snake-shaped structure inputs the cooling liquid after heat exchange into the cooling liquid for refrigeration through a second pipeline (8) and then stores the cooling liquid into the liquid storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122441460.6U CN216202461U (en) | 2021-10-11 | 2021-10-11 | Cooling and pressure stabilizing device of natural gas storage tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122441460.6U CN216202461U (en) | 2021-10-11 | 2021-10-11 | Cooling and pressure stabilizing device of natural gas storage tank |
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| CN216202461U true CN216202461U (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122441460.6U Active CN216202461U (en) | 2021-10-11 | 2021-10-11 | Cooling and pressure stabilizing device of natural gas storage tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115419820A (en) * | 2022-09-01 | 2022-12-02 | 南京航空航天大学 | A low-carbon LNG underground storage system that can heat and generate electricity |
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2021
- 2021-10-11 CN CN202122441460.6U patent/CN216202461U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115419820A (en) * | 2022-09-01 | 2022-12-02 | 南京航空航天大学 | A low-carbon LNG underground storage system that can heat and generate electricity |
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