CN219367418U - Storage system for cryogenic liquid - Google Patents
Storage system for cryogenic liquid Download PDFInfo
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- CN219367418U CN219367418U CN202320326655.2U CN202320326655U CN219367418U CN 219367418 U CN219367418 U CN 219367418U CN 202320326655 U CN202320326655 U CN 202320326655U CN 219367418 U CN219367418 U CN 219367418U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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Abstract
The utility model discloses a storage system for cryogenic liquid, which comprises a first cryogenic liquid storage tank, a second cryogenic liquid storage tank, a condenser, a booster pump and a pressure transmitter; the saturation temperature of the first cryogenic liquid stored in the first cryogenic liquid storage tank is lower than the saturation temperature of the second cryogenic liquid stored in the second cryogenic liquid storage tank; the detection end of the pressure transmitter is communicated with the top of the second low-temperature liquid storage tank, and the pressure transmitter is in signal connection with the booster pump; the condenser comprises a first liquid conveying pipeline and a second liquid conveying pipeline which can mutually exchange heat, the first liquid conveying pipeline is communicated with the first low-temperature liquid storage tank, and the second liquid conveying pipeline is communicated with the second low-temperature liquid storage tank; the booster pump is arranged in a pipeline which is communicated with the first liquid conveying pipeline at the bottom of the first low-temperature liquid storage tank. The working pressure of the second low-temperature liquid storage tank can be timely reduced, and the device has the advantages of no leakage and zero emission.
Description
Technical Field
The utility model relates to the technical field of liquefied gas storage, in particular to a storage system for cryogenic liquid.
Background
Liquid oxygen, liquid nitrogen, liquid argon, liquid helium, liquefied methane, liquid hydrogen and liquefied natural gas are industrial gases in the modern industry, and in order to improve the storage and transportation efficiency of the industrial gases, the prior art adopts a cryogenic technology to condense the industrial gases into condensed liquid gases with the temperature lower than-100 ℃, namely the cryogenic liquids commonly known in the industry.
With the rise of ambient temperature, the cryogenic liquid in the holding tank can be gasified continuously, so that the working pressure of the holding tank is increased continuously, if the gasified cryogenic liquid cannot be condensed timely, the working pressure of the holding tank is reduced to a safe pressure range, and the pressure is released in a temporary exhaust mode, so that accidents are avoided, methane, hydrogen and natural gas are all inflammable and explosive gases, and therefore, a large potential safety hazard exists during the pressure release.
Disclosure of Invention
In view of the above-mentioned shortcomings, the present utility model aims to provide a storage system for cryogenic liquid, which not only can timely reduce the working pressure of a storage tank as a protection target, but also has the advantages of no leakage and zero emission.
To achieve the purpose, the utility model adopts the following technical scheme:
a storage system for cryogenic liquid comprising a first cryogenic liquid storage tank, a second cryogenic liquid storage tank, a condenser, a booster pump, and a pressure transmitter;
the saturation temperature of the first cryogenic liquid stored in the first cryogenic liquid storage tank is lower than the saturation temperature of the second cryogenic liquid stored in the second cryogenic liquid storage tank;
the detection end of the pressure transmitter is communicated with the top of the second low-temperature liquid storage tank, and the pressure transmitter is in signal connection with the booster pump;
the condenser comprises a first liquid conveying pipeline and a second liquid conveying pipeline which can mutually exchange heat, wherein the output end and the input end of the first liquid conveying pipeline are respectively communicated with the top and the bottom of the first low-temperature liquid storage tank, and the input end and the output end of the second liquid conveying pipeline are respectively communicated with the top and the bottom of the second low-temperature liquid storage tank;
the booster pump is arranged in a pipeline which is communicated with the first liquid conveying pipeline at the bottom of the first low-temperature liquid storage tank.
Further, the bottom surface of the condenser is at a height not lower than the top of the second cryogenic liquid storage tank.
Preferably, the first cryogenic liquid is a condensate of an inert gas.
Further, the first low-temperature liquid storage tank is provided with a first communication pipeline and a second communication pipeline respectively;
the top of the first low-temperature liquid storage tank is communicated with the first liquid conveying pipeline through the first communication pipeline, and the bottom of the first low-temperature liquid storage tank is communicated with the first liquid conveying pipeline through the second communication pipeline;
the first communication pipeline is provided with a first low-temperature valve; the second communication pipeline is provided with a second low-temperature valve and a third low-temperature valve respectively, the second low-temperature valve is positioned between the booster pump and the bottom of the first low-temperature liquid storage tank, and the third low-temperature valve is positioned between the booster pump and the condenser.
Further, the first low-temperature liquid storage tank is also provided with a third communication pipeline;
the top of the first cryogenic liquid storage tank is communicated with the top of the compression cylinder of the booster pump through the third communication pipeline.
Further, the third communication pipeline is respectively provided with a fourth low-temperature valve and two safety valves;
the fourth low-temperature valve is positioned between the two safety valves.
Further, the second low-temperature liquid storage tank is respectively provided with a fourth communication pipeline and a fifth communication pipeline;
the bottom of the second low-temperature liquid storage tank is communicated with the second liquid conveying pipeline through the fourth communication pipeline, and the top of the second low-temperature liquid storage tank is communicated with the second liquid conveying pipeline through the fifth communication pipeline;
the third communication pipeline is provided with a fifth low-temperature valve; the fifth communication pipeline is provided with a sixth low-temperature valve.
The technical scheme of the utility model has the beneficial effects that: the storage system for the cryogenic liquid not only can timely reduce the working pressure of the second cryogenic liquid storage tank through the condenser and the first cryogenic liquid, thereby protecting the safety of the second cryogenic liquid storage tank, but also has the advantages of no leakage and zero emission.
Drawings
FIGS. 1 and 2 are schematic diagrams illustrating the operation of a storage system for cryogenic liquids according to the present utility model;
wherein: a first cryogenic liquid storage tank 1; a second cryogenic liquid storage tank 2; a condenser 3; a booster pump 6; a pressure transmitter 7; a first communication pipe 11; a second communication line 12; a third communication line 13; a fourth communication line 21; a fifth communication line 22; a first liquid delivery line 31; a second liquid delivery line 32; a bottom surface 33; a first cryogenic valve 41; a second cryogenic valve 42; a third cryogenic valve 43; a fourth cryogenic valve 44; a fifth cryogenic valve 45; a sixth cryogenic valve 46; a relief valve 51.
Detailed Description
The technical scheme of the utility model is further described below by means of specific embodiments in combination with the accompanying drawings 1-2.
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, so to speak, the two elements are communicated internally. It will be understood by those of ordinary skill in the art that the terms described above are in the specific sense of the present utility model.
A storage system for cryogenic liquid, comprising a first cryogenic liquid storage tank 1, a second cryogenic liquid storage tank 2, a condenser 3, a booster pump 6 and a pressure transmitter 7;
the saturation temperature of the first cryogenic liquid stored in the first cryogenic liquid storage tank 1 is lower than the saturation temperature of the second cryogenic liquid stored in the second cryogenic liquid storage tank 2;
the detection end of the pressure transmitter 7 is communicated with the top of the second cryogenic liquid storage tank 2, and the pressure transmitter 7 is in signal connection with the booster pump 6;
the condenser 3 comprises a first liquid conveying pipeline 31 and a second liquid conveying pipeline 32 which can mutually exchange heat, wherein the output end and the input end of the first liquid conveying pipeline 31 are respectively communicated with the top and the bottom of the first cryogenic liquid storage tank 1, and the input end and the output end of the second liquid conveying pipeline 32 are respectively communicated with the top and the bottom of the second cryogenic liquid storage tank 2;
the booster pump 6 is installed in a pipeline in which the bottom of the first cryogenic liquid storage tank 1 communicates with the first liquid delivery pipeline 31.
Fig. 1 is a schematic diagram of the operation of the storage system for cryogenic liquids of the present utility model.
In the storage system for cryogenic liquid of the present utility model, the second cryogenic liquid storage tank 2 is used as a protection target, the working pressure of the second cryogenic liquid storage tank 2 is set as the working threshold of the pressure transmitter 7, that is, when the working pressure of the second cryogenic liquid storage tank 2 reaches the upper limit value, the pressure transmitter 7 sends a start signal to the booster pump 6, otherwise, when the working pressure of the second cryogenic liquid storage tank 2 is lower than the lower limit value, the pressure transmitter 7 sends a stop signal to the booster pump 6.
When the ambient temperature reaches a certain temperature, the working pressure of the second cryogenic liquid storage tank 2 reaches an upper limit value, the working pressure of the second cryogenic liquid storage tank 2 detected by the pressure transmitter 7 reaches a starting threshold value and sends a signal to the booster pump 6, the booster pump 6 is started, the first cryogenic liquid stored in the first cryogenic liquid storage tank 1 is input into the condenser 3 through the first liquid conveying pipeline 31, and at the moment, the second liquid conveying pipeline 32 communicated with the condenser 3 is filled with gas formed by gasification of the second cryogenic liquid; since the saturation temperature of the first cryogenic liquid stored in the first cryogenic liquid storage tank 1 is lower than the saturation temperature of the second cryogenic liquid stored in the second cryogenic liquid storage tank 2, the external temperature of the first liquid transfer line 31 is lower than the external temperature of the second liquid transfer line 32, the gas formed by vaporization of the second cryogenic liquid in the second liquid transfer line 32 of the condenser 3 and the first cryogenic liquid in the first liquid transfer line 31 are subjected to heat exchange, the gas formed by vaporization of the second cryogenic liquid is cooled to be the second cryogenic liquid and flows back to the second cryogenic liquid storage tank 2, when the gas formed by vaporization of the second cryogenic liquid at the top of the second cryogenic liquid storage tank 2 is mostly cooled, the gas pressure at the top of the second cryogenic liquid storage tank 2 falls below the lower limit value of the operating pressure, the pressure transmitter 7 stops the detected operating pressure of the second cryogenic liquid storage tank 2 to the stop threshold value and sends a signal to the booster pump 6, and the booster pump 6 stops operating. In the whole condensation and pressure reduction process of the second cryogenic liquid storage tank 2, the first cryogenic liquid, the gas formed by gasifying the second cryogenic liquid and the second cryogenic liquid flow in the condenser 3, and the leakage condition of the gas formed by gasifying the second cryogenic liquid can not occur, so that the storage system for the cryogenic liquid can not only timely reduce the working pressure of the second cryogenic liquid storage tank 2 through the condenser 3 and the first cryogenic liquid, thereby protecting the safety of the second cryogenic liquid storage tank 2, but also has the advantages of no leakage and zero emission.
The saturation temperature refers to the temperature at which the liquid and vapor are in dynamic equilibrium, i.e., saturated. In the saturated state, the liquid and vapor temperatures are equal. When the saturation temperature is fixed, the saturation pressure is also fixed; conversely, when the saturation pressure is constant, the saturation temperature is also constant. The optimal saturation temperature is not a fixed value and varies with ambient conditions.
If the liquid is not filled in a closed container, a portion of the liquid molecules will enter the headspace, known as "evaporation". As the number of vapor molecules in the space increases, the resulting vapor pressure increases, and when the number of vapor molecules in the space no longer increases, the number of molecules leaving the liquid and the number of molecules returning from the space to the liquid reach a dynamic equilibrium, i.e., the "saturated state" is reached. The pressure at which the vapor is generated is called the "saturation pressure". The saturation pressure of the same substance is dependent on the temperature, and the higher the temperature is, the more energy the molecule has, the more easily the molecule is separated from the liquid and gasified, and the higher the saturation pressure is. In the saturated state, the corresponding temperature of the substance in the closed container at the saturation pressure is also referred to as the "saturation temperature".
Further, the bottom surface of the condenser 3 has a height 33 not lower than the top of the second cryogenic liquid storage tank 2.
As shown in fig. 2, the bottom surface 33 of the condenser 3 is kept above the top of the second cryogenic liquid storage tank 2, so that when the gas formed by gasifying the second cryogenic liquid is cooled to the second cryogenic liquid under the action of gravity, the gas flows back to the bottom of the second cryogenic liquid storage tank 2 in time and cannot be accumulated in the condenser 3, thereby avoiding the phenomenon that the air pressure in the condenser 3 is too high and further reducing the operation risk of the storage system for the cryogenic liquid.
Preferably, the first cryogenic liquid is a condensate of an inert gas.
The inert medium is selected as the first cryogenic liquid to protect the second cryogenic liquid which is a dangerous medium, so that the safety guarantee of the storage system for the cryogenic liquid can be further improved.
Further, the first cryogenic liquid storage tank 1 is provided with a first communication pipeline 11 and a second communication pipeline 12 respectively;
the top of the first cryogenic liquid storage tank 1 is communicated with the first liquid conveying pipeline 31 through the first communication pipeline 11, and the bottom of the first cryogenic liquid storage tank 1 is communicated with the first liquid conveying pipeline 31 through the second communication pipeline 12;
the first communication pipe 11 is provided with a first low-temperature valve 41; the second communication pipeline 12 is provided with a second low-temperature valve 42 and a third low-temperature valve 43 respectively, the second low-temperature valve 42 is positioned between the booster pump 6 and the bottom of the first low-temperature liquid storage tank 1, and the third low-temperature valve 43 is positioned between the booster pump 6 and the condenser 3.
As shown in fig. 1, the gas input and output of the first cryogenic liquid at the top of the first cryogenic liquid storage tank 1 can be controlled by the first cryogenic valve 41, the input and output of the first cryogenic liquid from the bottom of the first cryogenic liquid storage tank 1 can be controlled by the second cryogenic valve 42 and the third cryogenic valve 43, and the convenience of the disassembly and assembly of the storage system for cryogenic liquid can be improved.
Further, the first cryogenic liquid storage tank 1 is further provided with a third communication pipeline 13;
the top of the first cryogenic liquid storage tank 1 is communicated with the top of the compression cylinder of the booster pump 6 through the third communication pipe 13.
As shown in fig. 1, the first cryogenic liquid remaining in the compression cylinder of the booster pump 6 after the stop can be transferred to the top of the first cryogenic liquid storage tank 1 through the third communication pipe 13 to relieve the air pressure of the compression cylinder of the booster pump 6.
Further, the third communication pipeline 13 is respectively provided with a fourth low-temperature valve 44 and two safety valves 51;
the fourth cryogenic valve 44 is located between two of the relief valves 51.
As shown in fig. 1, the on-off of the third communication pipeline 13 can be controlled through the fourth low-temperature valve 44; the first low-temperature liquid remaining in the third communication line 13 and the compression cylinder of the booster pump 6 at the time of attachment and detachment can be discharged through the two relief valves 51.
Further, the second cryogenic liquid storage tank 2 is provided with a fourth communication pipeline 21 and a fifth communication pipeline 22 respectively;
the bottom of the second cryogenic liquid storage tank 2 is communicated with the second liquid delivery pipeline 32 through the fourth communication pipeline 21, and the top of the second cryogenic liquid storage tank 2 is communicated with the second liquid delivery pipeline 32 through the fifth communication pipeline 22;
the fourth communication pipeline 21 is provided with a fifth low-temperature valve 45; the fifth communication line 22 is fitted with a sixth cryogenic valve 46.
As shown in fig. 1, the fifth and sixth low-temperature valves 45 and 46 can control the on/off of the fourth and fifth communication lines 21 and 22, respectively, so as to control the on/off of the second low-temperature liquid storage tank 2 and the second liquid delivery line 32.
In summary, in the embodiment of the utility model shown in fig. 1-2, the storage system for cryogenic liquid not only can timely reduce the working pressure of the second cryogenic liquid storage tank 2 through the condenser 3 and the first cryogenic liquid, thereby protecting the safety of the second cryogenic liquid storage tank 2, but also has the advantages of no leakage and zero emission.
The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (7)
1. A storage system for cryogenic liquid comprising a first cryogenic liquid storage tank, a second cryogenic liquid storage tank, a condenser, a booster pump, and a pressure transmitter;
the saturation temperature of the first cryogenic liquid stored in the first cryogenic liquid storage tank is lower than the saturation temperature of the second cryogenic liquid stored in the second cryogenic liquid storage tank;
the detection end of the pressure transmitter is communicated with the top of the second low-temperature liquid storage tank, and the pressure transmitter is in signal connection with the booster pump;
the condenser comprises a first liquid conveying pipeline and a second liquid conveying pipeline which can mutually exchange heat, wherein the output end and the input end of the first liquid conveying pipeline are respectively communicated with the top and the bottom of the first low-temperature liquid storage tank, and the input end and the output end of the second liquid conveying pipeline are respectively communicated with the top and the bottom of the second low-temperature liquid storage tank;
the booster pump is arranged in a pipeline which is communicated with the first liquid conveying pipeline at the bottom of the first low-temperature liquid storage tank.
2. The storage system for cryogenic liquids according to claim 1, wherein the bottom surface of the condenser is at a level not lower than the top of the second cryogenic liquid storage tank.
3. The storage system for cryogenic liquids of claim 1, wherein the first cryogenic liquid is a condensate of an inert gas.
4. The storage system for cryogenic liquids according to claim 1, wherein the first cryogenic liquid storage tank is provided with a first communication line and a second communication line, respectively;
the top of the first low-temperature liquid storage tank is communicated with the first liquid conveying pipeline through the first communication pipeline, and the bottom of the first low-temperature liquid storage tank is communicated with the first liquid conveying pipeline through the second communication pipeline;
the first communication pipeline is provided with a first low-temperature valve; the second communication pipeline is provided with a second low-temperature valve and a third low-temperature valve respectively, the second low-temperature valve is positioned between the booster pump and the bottom of the first low-temperature liquid storage tank, and the third low-temperature valve is positioned between the booster pump and the condenser.
5. The storage system for cryogenic liquids according to claim 4, wherein said first cryogenic liquid storage tank is further provided with a third communication line;
the top of the first cryogenic liquid storage tank is communicated with the top of the compression cylinder of the booster pump through the third communication pipeline.
6. The storage system for cryogenic liquids according to claim 5, wherein the third communication line is equipped with a fourth cryogenic valve and two safety valves, respectively;
the fourth low-temperature valve is positioned between the two safety valves.
7. The storage system for cryogenic liquids according to claim 6, wherein the second cryogenic liquid storage tank is provided with a fourth communication line and a fifth communication line, respectively;
the bottom of the second low-temperature liquid storage tank is communicated with the second liquid conveying pipeline through the fourth communication pipeline, and the top of the second low-temperature liquid storage tank is communicated with the second liquid conveying pipeline through the fifth communication pipeline;
the third communication pipeline is provided with a fifth low-temperature valve; the fifth communication pipeline is provided with a sixth low-temperature valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320326655.2U CN219367418U (en) | 2023-02-27 | 2023-02-27 | Storage system for cryogenic liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320326655.2U CN219367418U (en) | 2023-02-27 | 2023-02-27 | Storage system for cryogenic liquid |
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| Publication Number | Publication Date |
|---|---|
| CN219367418U true CN219367418U (en) | 2023-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320326655.2U Active CN219367418U (en) | 2023-02-27 | 2023-02-27 | Storage system for cryogenic liquid |
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| CN (1) | CN219367418U (en) |
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- 2023-02-27 CN CN202320326655.2U patent/CN219367418U/en active Active
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