CN210179303U - Liquefied gas storage device - Google Patents
Liquefied gas storage device Download PDFInfo
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- CN210179303U CN210179303U CN201920719189.8U CN201920719189U CN210179303U CN 210179303 U CN210179303 U CN 210179303U CN 201920719189 U CN201920719189 U CN 201920719189U CN 210179303 U CN210179303 U CN 210179303U
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- 230000004888 barrier function Effects 0.000 claims abstract description 30
- 230000007704 transition Effects 0.000 claims description 42
- 239000011810 insulating material Substances 0.000 claims description 25
- 239000012774 insulation material Substances 0.000 claims description 12
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 37
- 238000009834 vaporization Methods 0.000 abstract description 4
- 230000008016 vaporization Effects 0.000 abstract description 4
- 230000009977 dual effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 59
- 238000001816 cooling Methods 0.000 description 9
- 238000009833 condensation Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000003949 liquefied natural gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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- 239000006260 foam Substances 0.000 description 1
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- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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Abstract
The utility model relates to a cryogenic liquids stores technical field, discloses a liquefied gas storage device, include: a tank for storing liquefied gas and a refrigerator provided on the tank; the periphery of the storage tank is provided with a barrier structure, the interior of the storage tank is provided with a low-temperature heat exchanger, and the refrigerator is respectively connected with the barrier structure and the low-temperature heat exchanger. The utility model provides a liquefied gas storage device, through set up the refrigerator on the storage tank and produce the cold source, and transmit cold volume respectively to the barrier structure around the storage tank and the cryogenic heat exchanger inside the storage tank, can form the low temperature barrier around the storage tank, reduce the external heat leak to the storage tank in, reduce the vaporization of liquefied gas in the storage tank; meanwhile, a cold source can be provided in the storage tank to re-condense the vaporized gas; due to the dual functions of the barrier structure and the low-temperature heat exchanger, the pressure of the space where the gas in the storage tank is located can be reduced, so that the combustible gas is not discharged outside, the energy is saved, and the influence on the external environment is reduced.
Description
Technical Field
The utility model relates to a cryogenic liquids stores technical field, especially relates to a liquefied gas storage device.
Background
The low-temperature liquefied gas storage is a gas storage mode which is closest to large-scale popularization and application in technical maturity and feasibility at present, low-temperature liquefied gases such as liquid hydrogen, liquefied natural gas and the like are clean and environment-friendly, and have high energy density, and new energy aircrafts, automobiles and ships adopting liquefied gas have wide application prospects and huge potential markets.
However, the low-temperature liquefaction storage of combustible gases such as common liquefied natural gas and hydrogen has low-temperature liquid evaporation caused by heat leakage. Cryogenic tanks typically use passive thermal insulation techniques (e.g., multilayer insulation, stacked powder insulation, foam insulation, etc.) to keep the cryogenic liquid warm, but since the cryogenic liquid temperature is much lower than ambient temperature, there is inevitable heat leakage.
As the storage time is prolonged, the cryogenic liquid absorbs heat and vaporizes, so that the pressure in the storage tank is increased, and the cryogenic liquid needs to be discharged to the environment when the pressure exceeds an allowable value, which inevitably causes waste and safety problems.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model aims at providing a liquefied gas storage device for solve or partially solve current liquefied gas storage tank because leak heat vaporization leads to the too big waste and the safety problem that need discharge combustible gas of internal pressure and exist.
(II) technical scheme
In order to solve the technical problem, the utility model provides a liquefied gas storage device, include: a tank for storing liquefied gas and a refrigerator provided on the tank; the storage tank is provided with a barrier structure at the periphery, a low-temperature heat exchanger is arranged in the storage tank, and the refrigerating machine is respectively connected with the barrier structure and the low-temperature heat exchanger.
On the basis of the scheme, the refrigerating machine comprises a compressor and a cold head, the compressor is connected with the cold head through a transition channel, the cold head is connected with one end of a cold quantity transportation channel, the other end of the cold quantity transportation channel is inserted into the storage box and connected with the low-temperature heat exchanger, and the barrier structure is connected with the transition channel.
On the basis of the scheme, the low-temperature heat exchanger is placed in the liquefied gas, the vaporized gas or connected with the wall surface of the storage tank.
On the basis of the scheme, the method further comprises the following steps: a thermal switch, a pressure sensor and a controller; the hot switch is arranged at one end of the cold quantity conveying channel close to the cold head or one end of the transition channel close to the compressor, the pressure sensor is arranged in the storage box, the controller is respectively connected with the compressor, the hot switch and the pressure sensor, and the controller is used for controlling intermittent synchronous opening and closing of the compressor and the hot switch according to the gas pressure in the storage box.
On the basis of the scheme, the wall surface of the storage box comprises an inner wall, the barrier structure comprises a cold shield, the cold shield surrounds the outer side of the inner wall, and a first vacuum gap is formed between the inner wall and the cold shield.
On the basis of the scheme, the wall surface of the storage box further comprises an outer wall, the outer wall surrounds the outer side of the cold shield, and a second vacuum gap is formed between the cold shield and the outer wall; the first vacuum gap is filled with a first heat-insulating material layer, and the outer side of the cold shield is wrapped with a second heat-insulating material layer.
On the basis of the scheme, the inner wall is provided with a first protruding portion, the first protruding portion is inserted into the first heat-preservation material layer, the first protruding portion is of a hollow structure and is communicated with the interior of the storage box, the cold head is connected with the first wall face of the first protruding portion, and the cold quantity transportation channel penetrates through the first wall face and is inserted into the interior of the storage box.
On the basis of the scheme, a plurality of thermal bridges are arranged on the wall surface of the first protruding part.
On the basis of the scheme, the outer wall is provided with a second protruding portion, the second protruding portion is of a hollow structure and is communicated with the second vacuum gap, the compressor is connected with one end, far away from the second protruding portion, of the outer wall, the transition channel penetrates through the second protruding portion, the second heat-insulation material layer and the cold shield in sequence, and then the transition channel is inserted into the first heat-insulation material layer and is connected with the cold head.
On the basis of the scheme, the wall surface of the second protruding part is provided with a vacuum pumping nozzle.
(III) advantageous effects
The utility model provides a liquefied gas storage device, through set up the refrigerator on the storage tank and produce the cold source, and transmit cold volume respectively to the barrier structure around the storage tank and the cryogenic heat exchanger in the storage tank, can form the low temperature barrier around the storage tank, reduce the external heat leakage to the storage tank in, maintain the low temperature environment in the storage tank, reduce the vaporization of liquefied gas in the storage tank; meanwhile, a cold source can be provided in the storage tank, so that the temperature in the storage tank is reduced, and the vaporized gas is condensed again; due to the dual functions of the barrier structure and the low-temperature heat exchanger, the pressure of the space where the gas in the storage tank is located can be reduced, so that the combustible gas is not discharged outside, the energy is saved, and the influence on the external environment is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a liquefied gas storage device according to an embodiment of the present invention.
Description of reference numerals:
1-a compressor; 2, vacuum pumping; 3-outer wall;
4, cooling; 5-inner wall; 6 a-a second insulating material layer;
6 b-vacuum chamber; 7-a first insulating material layer; 8-liquefied gas;
9-vaporizing the gas; 10-low temperature heat exchanger; 11-cold transport channel;
12-thermal bridging; 13-cold head; 14-a transition channel;
15 — a first projection; 16 — second projection.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, 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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
An embodiment of the utility model provides a liquefied gas storage device, referring to fig. 1, this storage device includes: a tank for storing liquefied gas 8 and a refrigerator provided on the tank. The storage box is provided with a barrier structure around. The interior of the tank is provided with a cryogenic heat exchanger 10. The refrigerator is connected to the barrier structure and the cryogenic heat exchanger 10, respectively.
According to the liquefied gas storage device provided by the embodiment, the refrigerator is arranged on the storage tank to generate a cold source, and cold energy is respectively transmitted to the barrier structure around the storage tank and the low-temperature heat exchanger 10 inside the storage tank, so that a low-temperature barrier can be formed around the storage tank, heat leakage from the outside to the storage tank is reduced, the low-temperature environment in the storage tank is maintained, and vaporization of liquefied gas in the storage tank is reduced; meanwhile, a cold source is provided in the storage tank, so that the temperature in the storage tank is reduced, and the vaporized gas is condensed again; the barrier structure and the low-temperature heat exchanger 10 can reduce the pressure of the space where the gas in the storage tank is located, so that the combustible gas is not discharged outside, the energy is saved, and the influence on the external environment is reduced.
The storage device uses a refrigerator to form a low-temperature barrier around the storage tank, and provides a cold source inside the storage tank, thereby realizing the active refrigeration technology of zero evaporation of the low-temperature liquid storage tank.
On the basis of the above embodiment, further, the refrigerator includes the compressor 1 and the cold head 13. The compressor 1 is connected to the cold head 13 via a transition duct 14. The cold head 13 is connected with one end of the cold quantity transportation channel 11, and the other end of the cold quantity transportation channel 11 is inserted into the storage box and connected with the low-temperature heat exchanger 10. The barrier structure is connected to the transition passage 14.
This embodiment describes the connection between the refrigerator and the storage tank. The compressor 1 of the refrigerator is connected to an external power source, and cold energy can be generated at the cold head 13 by the operation of the compressor 1. A transition channel 14 is arranged between the compressor 1 and the cold head 13, and the transition channel 14 is a temperature-changing transition section for cold quantity transmission. The temperature decreases in sequence from the compressor 1 along the transition passage 14 to the cold head 13.
The cold at the cold head 13 is transferred to the cryogenic heat exchanger 10 via the cold transport channel 11. The cryogenic heat exchanger 10 is placed inside the tank to cool the internal space of the tank, condensing the vaporized gas to control the pressure. The cold transport channel 11 can run through the wall of the tank connecting the cold head 13 and the cryogenic heat exchanger 10.
The barrier structure is connected with the transition channel 14 at the periphery of the storage tank, so that cold energy at the transition channel 14 is absorbed, a low-temperature barrier is formed at the periphery of the storage tank, and heat leakage from the outside to the storage tank is reduced. The barrier structure utilizes the cold volume of transition passageway 14, and further leads into the cold volume of temperature lower to cryogenic heat exchanger 10 through cold volume transport passageway 11, realizes gaseous recondensation, but the cold volume of the different temperature stages that the stage pertinence utilization refrigerator produced can be divided for the cold volume of the different temperature stages that the refrigerator produced all can make full use of, thereby realize the effective rational utilization of cold volume, avoid the energy waste, improve refrigeration cooling efficiency, be favorable to practicing thrift the energy consumption.
Further, the cold energy transportation channel 11 and the transition channel 14 may be heat conducting rods, or may be pipes with heat exchange media inside, and are not limited specifically.
On the basis of the above-described embodiment, further, the cryogenic heat exchanger 10 is placed in the liquefied gas 8, i.e., the cryogenic liquid, inside the tank, in the boil-off gas 9, or in connection with the wall surface of the tank. And is not particularly limited.
On the basis of the above embodiment, further, a liquefied gas storage apparatus further includes: a thermal switch, a pressure sensor, and a controller. The thermal switch is arranged at one end of the cold transport channel 11 close to the cold head 13 or at one end of the transition channel 14 close to the compressor 1. The pressure sensor is arranged in the storage box, and the controller is respectively connected with the compressor 1, the thermal switch and the pressure sensor. The controller is used to control the intermittent synchronous turning on and off of the compressor 1 and the thermal switch according to the gas pressure inside the tank.
The storage device for liquefied gas 8 is provided with a refrigerator in an intermittent operation mode. The pressure sensor is used for monitoring the pressure of the gas in the storage tank in real time. The controller controls the operation of the refrigerator according to the pressure. When the gas pressure exceeds a set value, starting the refrigerator to cool, and realizing recondensation of the gas, so that the pressure of the space where the gas is located is reduced; when the pressure of the space where the gas is located is reduced to a safe interval, the compressor 1 of the refrigerating machine is closed.
Further, the controller controls the thermal switch to be closed while controlling the refrigerator to start and operate, so that the cold energy generated by the refrigerator can be conveyed to the barrier structure and the storage tank for cooling along the transition channel 14 and the cold energy conveying channel 11; and the controller controls the refrigerator to be closed and stopped to operate, and simultaneously controls the thermal switch to be switched off, so that external heat cannot be transmitted along the transition channel 14 or the cold quantity transportation channel 11, and heat leakage of the refrigerator from the outside is prevented from being guided into the storage tank through solid heat conduction along the transition channel 14 or the cold quantity transportation channel 11.
The thermal switch is arranged at one end of the cold quantity transport channel 11 close to the cold head 13 or one end of the transition channel 14 close to the compressor 1, and can cut off heat transmission from a position far away from the low-temperature heat exchanger 10 when the refrigerator stops running, so that heat leakage from the outside to the inside of the storage tank through solid heat conduction can be better reduced, and the low-temperature environment of the storage tank is favorably maintained.
According to the liquefied gas storage device provided by the embodiment, the refrigerating machine is set to be in an intermittent working mode, so that the continuous operation of the refrigerating machine can be avoided, and the refrigerating machine can keep better operation efficiency in each operation, so that the refrigerating and cooling efficiency is improved, the electric energy consumed by the refrigerating machine is saved, and the energy burden is reduced; the thermal switch is arranged on the transition channel 14 or the cold quantity transport channel 11, so that the heat conduction from the refrigerator at the room temperature end to the solid inside the storage box after the refrigerator is closed can be effectively reduced, the heat leakage inside the storage box is reduced, and the cooling efficiency is improved.
On the basis of the above described embodiment, further, the wall surface of the tank comprises an inner wall 5. The barrier structure comprises a cold shield 4. The cold shield 4 is arranged around the outside of the inner wall 5, and a first vacuum gap is present between the inner wall 5 and the cold shield 4. This example illustrates a specific arrangement of the barrier structure. The barrier structure may be a wall that encloses the inner wall 5 of the tank inside, since this wall is at a lower temperature in contact with the transition duct 14 and is therefore referred to as the cold shield 4.
On the basis of the above embodiment, furthermore, the wall surface of the tank also comprises an outer wall 3. The outer wall 3 surrounds the outside of the cold shield 4. A second vacuum gap is present between the cold shield 4 and the outer wall 3. The first vacuum gap is filled with a first heat-insulating material layer 7. And a second heat-insulating material layer 6a is wrapped on the outer side of the cold shield 4.
The present embodiment specifically describes the wall surface structure of the storage tank. The walls of the tank comprise a double wall of an inner wall 5 and an outer wall 3. A vacuum gap is present between the inner wall 5 and the outer wall 3. The cold screen 4 is arranged between the inner wall 5 and the outer wall 3 with a gap between the inner wall 5 and the outer wall 3. The cold screen 4 is arranged between the first heat-insulating material layer 7 and the second heat-insulating material layer 6a, and can uniformly transmit cold quantity to the heat-insulating material layers on two sides so as to cool the heat-insulating material layers, better play a heat-insulating role and reduce heat leakage from the outside to the inside of the storage box.
The first vacuum gap and the second vacuum gap are arranged, so that the first heat-insulating material layer 7 and the second heat-insulating material layer 6a are in a vacuum environment, and the function can be effectively realized. There may be a gap between the second insulating material layer 6a and the outer wall 3 to enhance the insulating effect, reduce heat leakage, and reduce frosting on the surface of the outer wall 3.
On the basis of the above embodiment, further, the inner wall 5 is provided with the first projecting portion 15. The first projecting portion 15 is inserted into the first thermal insulation material layer 7. The first projection 15 is of a hollow structure and communicates with the interior of the tank. The cold head 13 is in contact with a first wall of the first protrusion 15. The cold transport channel 11 is inserted through the first wall surface into the interior of the tank.
When the cryogenic heat exchanger 10 is placed inside the tank, a first projection 15 is provided on the tank inner wall 5, and the cold transport channel 11 is inserted inside the tank at the first projection 15. The provision of the first projection 15 may serve as a temperature transition. Since the temperature of the liquefied gas 8 is very low, the difference from the outside ambient temperature is large. The first bulge 15 can increase the distance between the first bulge 15 and the liquefied gas 8, so that the temperature difference between the wall surface of the first bulge 15 and the external environment is relatively reduced, and the formation of frost on the outer surface of the wall surface of the first bulge 15 can be reduced; and what first bulge 15 inner space was stored is boil-off gas 9, sets up first bulge 15 and still can increase the scope of boil-off gas 9 and cold volume transport passageway 11 and low temperature heat exchanger 10 contact, is favorable to better cooling condensation to boil-off gas 9.
Since the first heat insulating material layer 7 is wrapped on the outer side of the inner wall 5, the protrusion portion protruding from the inner wall 5 is inserted into the first heat insulating material layer 7. The cold head 13 is contacted with the first wall surface, so that the cold quantity at the cold head 13 can be directly transmitted to the inner wall 5 of the storage box through the first wall surface, the cold quantity can be more effectively transmitted to the storage box, and the cooling efficiency is improved. The cold head 13 is also positioned in the first heat-insulating material layer 7, and can cool the first heat-insulating material layer, so that the heat-insulating efficiency is improved, and heat leakage is prevented.
In addition to the above-described embodiment, further, a plurality of thermal bridges 12 are provided on the wall surface of the first projecting portion 15. The heat leakage between the inner wall 5 of the low-temperature liquid storage tank and the cold head 13 of the refrigerating machine can be effectively reduced. The thermal bridges 12 are provided on the wall surfaces on both sides of the first wall surface of the first projecting portion 15, respectively. The thermal bridge 12 is also located inside the first insulating-material layer 7.
In addition to the above-mentioned embodiment, the outer wall 3 is further provided with a second protrusion 16. The second projection 16 is hollow and communicates with the second vacuum gap. The compressor 1 is connected to the end of the second projection 16 remote from said outer wall 3. The transition passage 14 passes through the second bulge 16, the second heat insulation material layer 6a and the cold screen 4 in sequence and then is inserted into the first heat insulation material layer 7 to be connected with the cold head 13.
The provision of the second projection 16 likewise serves for a temperature transition. The second bulge 16 can increase the distance between the second bulge and the inner gap of the outer wall 3, so that the temperature difference between the wall surface of the second bulge 16 and the external environment is relatively reduced, and the formation of frost on the outer surface of the wall surface of the second bulge 16 can be reduced; and compressor 1 links to each other with second bulge 16 for transition passageway 14 disect insertion second bulge 16, transition passageway 14 is in the vacuum environment, can prevent that the external world from leaking heat and keeping low temperature to transition passageway 14, is favorable to keeping cold source temperature, the better condensation of cooling to boil off gas 9.
The second projection 16 is provided for connecting the compressor 1, and can better connect the compressor 1 with the storage tank, so that the whole structure is more compact and integrated. The transition passage 14 passes through the cold shield 4 to realize connection with the cold shield 4, and then transmits cold energy to the cold shield 4. The cold shield 4 comprises heat conducting walls. I.e. the cold shield 4 may be a wall formed of a heat conducting material surrounding the inner wall 5.
In addition to the above embodiment, further, the wall surface of the second protruding portion 16 is provided with the vacuum suction nozzle 2. Is convenient for vacuum-pumping treatment.
On the basis of the above embodiment, further, a liquefied gas storage device mainly comprises a refrigerator compressor 1, a vacuum suction nozzle 2, a low-temperature liquid storage tank outer wall 3, a cold shield 4, a low-temperature liquid storage tank inner wall 5, a first heat preservation material layer 7, a vacuum cavity 6b, a second heat preservation material layer 6a, low-temperature liquid, gas, a low-temperature heat exchanger 10, a cold quantity transport channel 11, a heat bridge 12, a refrigerator cold head 13, a refrigerator temperature change transition section and other components. Wherein the vacuum cavity 6b is a cavity formed by a gap between the second thermal insulation material layer 6a and the outer wall 3. The transition passage 14 is a temperature-changing transition section of the refrigerator.
And a cold screen 4 is arranged at a certain position in the middle of the temperature-changing transition section of the refrigerating machine and is used for cooling the first heat-insulating material layer 7 and the second heat-insulating material layer 6a and reducing heat leakage from the outer wall 3 of the low-temperature liquid storage tank to the inner wall 5 of the low-temperature liquid storage tank. The cold quantity of the cold head 13 of the refrigerating machine with lower temperature is guided into the low-temperature heat exchanger 10 through the cold quantity conveying channel 11, the re-condensation of the gas is realized, and therefore the whole device does not discharge the gas to the external environment.
The refrigerator cold head 13 is isolated from the gas in the inner wall 5 of the low-temperature liquid storage tank, so that the temperature change transition section of the refrigerator and the refrigerator cold head 13 can be ensured to be in a vacuum state. Wherein the vacuum degree of the first vacuum gap and the second vacuum gap is between 0Pa and normal pressure. A heat bridge 12 is arranged between the cold head 13 of the refrigerating machine and the inner wall 5 of the low-temperature liquid storage tank, so that heat leakage between the inner wall 5 of the low-temperature liquid storage tank and the cold head 13 of the refrigerating machine can be effectively reduced.
A first heat-insulating material layer 7 is filled between the inner wall 5 of the low-temperature liquid storage tank and the cold shield 4. The outside of the cold screen 4 is wrapped with a second thermal insulation material layer 6 a. Further reducing the heat leakage from the outer wall 3 of the low-temperature liquid storage tank to the inner wall 5 of the low-temperature liquid storage tank, thereby reducing the power consumption required by the re-condensing gas refrigerator and saving energy. The cryogenic liquid may be liquid helium, liquid hydrogen, liquid nitrogen, or other cryogenic liquid.
Taking the low-temperature liquid as the liquid hydrogen as an example, the storage device has the following specific operations: the cold screen 4 is arranged at a certain position in the middle of the temperature-changing transition section of the refrigerating machine, the temperature of the first heat-insulating material layer 7 and the temperature of the second heat-insulating material layer 6a are reduced, and heat leakage from the outer wall 3 of the low-temperature liquid storage tank to the inner wall 5 of the low-temperature liquid storage tank is reduced. Meanwhile, the cold quantity of the cold head 13 of the refrigerating machine with lower temperature is guided into the low-temperature heat exchanger 10 through the cold quantity conveying channel 11, the re-condensation of the gas is realized, and therefore the whole device does not discharge the gas to the external environment.
The refrigerator cold head 13 is isolated from the gas in the inner wall 5 of the low-temperature liquid storage tank, mainly in order to ensure that the temperature-changing transition section of the refrigerator and the refrigerator cold head 13 are in a vacuum state. In addition, a thermal bridge 12 is installed between the refrigerator cold head 13 and the inner wall 5 of the low-temperature liquid storage tank, so as to reduce heat leakage between the inner wall 5 of the low-temperature liquid storage tank and the refrigerator cold head 13. In addition, a first heat insulation material layer 7 is filled between the inner wall 5 of the low-temperature liquid storage tank and the cold screen 4, and a second heat insulation material layer 6a is bound outside the cold screen 4, so that heat leakage from the outer wall 3 of the low-temperature liquid storage tank to the inner wall 5 of the low-temperature liquid storage tank is further reduced, and power consumption required by the recondensing gas refrigerator is reduced.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A liquefied gas storage device comprising: a tank for storing liquefied gas and a refrigerator provided on the tank; the refrigerator is characterized in that a barrier structure is arranged on the periphery of the storage tank, a low-temperature heat exchanger is arranged in the storage tank, and the refrigerator is respectively connected with the barrier structure and the low-temperature heat exchanger.
2. The liquefied gas storage device according to claim 1, wherein the refrigerator comprises a compressor and a cold head, the compressor is connected with the cold head through a transition passage, the cold head is connected with one end of a cold transportation passage, the other end of the cold transportation passage is inserted into the storage tank and connected with the cryogenic heat exchanger, and the barrier structure is connected with the transition passage.
3. The liquefied gas storage device according to claim 2, wherein the cryogenic heat exchanger is placed in the liquefied gas inside the tank, in the boil-off gas, or in connection with the wall of the tank.
4. The liquefied gas storage device of claim 2, further comprising: a thermal switch, a pressure sensor and a controller; the hot switch is arranged at one end of the cold quantity conveying channel close to the cold head or one end of the transition channel close to the compressor, the pressure sensor is arranged in the storage box, the controller is respectively connected with the compressor, the hot switch and the pressure sensor, and the controller is used for controlling intermittent synchronous opening and closing of the compressor and the hot switch according to the gas pressure in the storage box.
5. The liquefied gas storage device according to any one of claims 2 to 4, wherein the wall of the tank includes an inner wall, and the barrier structure includes a cold shield disposed around an outer side of the inner wall, there being a first vacuum gap between the inner wall and the cold shield.
6. The liquefied gas storage device according to claim 5, wherein the wall of the tank further comprises an outer wall surrounding the cold shield, a second vacuum gap existing between the cold shield and the outer wall; the first vacuum gap is filled with a first heat-insulating material layer, and the outer side of the cold shield is wrapped with a second heat-insulating material layer.
7. The liquefied gas storage device according to claim 6, wherein a first protrusion is provided on the inner wall, the first protrusion is inserted into the first thermal insulation material layer, the first protrusion is hollow and communicates with the inside of the tank, the cold head is connected to a first wall surface of the first protrusion, and the cold transport passage is inserted into the inside of the tank through the first wall surface.
8. The liquefied gas storage device according to claim 7, wherein a plurality of thermal bridges are provided on a wall surface of the first projection.
9. The liquefied gas storage device according to claim 6, wherein a second protrusion is provided on the outer wall, the second protrusion is of a hollow structure and is communicated with the second vacuum gap, the compressor is connected to an end of the second protrusion, which is away from the outer wall, and the transition passage passes through the second protrusion, the second thermal insulation material layer and the cold shield in sequence and then is inserted into the first thermal insulation material layer to be connected to the cold head.
10. The liquefied gas storage device according to claim 9, wherein a vacuum nozzle is provided on a wall surface of the second projection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920719189.8U CN210179303U (en) | 2019-05-17 | 2019-05-17 | Liquefied gas storage device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920719189.8U CN210179303U (en) | 2019-05-17 | 2019-05-17 | Liquefied gas storage device |
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| CN210179303U true CN210179303U (en) | 2020-03-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081303A (en) * | 2019-05-17 | 2019-08-02 | 中国科学院理化技术研究所 | A kind of liquefied gas storage device |
| CN111765367A (en) * | 2020-05-15 | 2020-10-13 | 刘姿含 | Self-heat-absorption type liquid gas storage tank |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081303A (en) * | 2019-05-17 | 2019-08-02 | 中国科学院理化技术研究所 | A kind of liquefied gas storage device |
| CN110081303B (en) * | 2019-05-17 | 2024-04-19 | 中国科学院理化技术研究所 | Liquefied gas storage device |
| CN111765367A (en) * | 2020-05-15 | 2020-10-13 | 刘姿含 | Self-heat-absorption type liquid gas storage tank |
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