Gas storage device

Abstract

The present invention discloses a gas storage device, including a vacuum chamber, a storage chamber and a storage container. A vacuum cavity is formed inside the vacuum chamber, and an air inlet and an air outlet are provided on the vacuum chamber; the storage chamber is accommodated in the vacuum chamber and installed on the inner wall of the vacuum chamber through a heat-insulating pad; each outer chamber wall of the storage chamber is spaced apart from the inner wall of the vacuum chamber to form a vacuum gap between the storage chamber and the vacuum chamber, and a heat exchange channel is formed in the chamber wall of the storage chamber; the storage container is installed in the storage chamber. The present invention stores gas at low temperature and medium pressure, and does not require a high-pressure compressor and a high-pressure resistant storage tank, thereby reducing costs. In addition, the heat exchange between the storage chamber and the external environment is reduced by the vacuum gap, and a heat exchange channel is provided on the chamber wall of the storage chamber to block the heat transfer between the internal and external environments, so that the gas storage device has an excellent heat insulation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of gas storage, and in particular to a gas storage device. Background Art

[0002] Many gases used as gas fuels or new energy sources (such as hydrogen) are flammable and explosive, making them extremely difficult to store on a large scale. Large-scale utilization requires cheap and safe storage. Gas storage and transportation in existing technologies usually use high-pressure pressurized storage and gas liquefaction storage.

[0003] In the prior art, when storing gas through high-pressure pressurization, it is necessary to select expensive gas storage tanks and large-flow high-pressure compressors, which leads to high costs and extremely high energy consumption; when storing gas through liquefaction, the cost of liquefaction equipment is extremely high and the energy consumption of the liquefaction process is high, so it cannot be widely promoted and applied for the time being. Summary of the invention

[0004] The main purpose of the present invention is to provide a gas storage device, aiming to solve the problems of high cost, high energy consumption and easy occurrence of safety accidents in existing hydrogen storage.

[0005] To achieve the above object, the present invention provides a gas storage device, comprising:

[0006] A vacuum chamber, wherein a vacuum cavity is formed inside the vacuum chamber, and an air inlet and an air outlet are provided on the vacuum chamber;

[0007] A storage chamber, the storage chamber is accommodated in the vacuum chamber and is installed on the inner wall of the vacuum chamber through a heat-insulating pad. Each chamber wall of the storage chamber is spaced from the corresponding inner wall of the vacuum chamber to form a vacuum gap between the storage chamber and the vacuum chamber. A heat exchange channel is formed in the chamber wall of the storage chamber, and an external cold source supplies cold to the storage chamber through the heat exchange channel.

[0008] A storage container is installed in the storage chamber and is used to store the gas. The storage container is connected to the gas inlet through an air inlet pipe and is connected to the gas outlet through an air outlet pipe.

[0009] Preferably, each chamber wall of the storage chamber is made by splicing a plurality of partitions, the heat exchange channel is formed inside each partition, an air inlet pipe and an exhaust pipe connected to the heat exchange channel are installed outside the storage chamber, the air inlet pipe is connected to an external cold source through the air inlet, and the exhaust pipe is connected to the air outlet.

[0010] Preferably, each of the partitions includes a heat conducting plate, a heat exchanger and a heat insulating plate which are arranged in sequence from the inside to the outside, a heat exchange cavity is formed between the heat conducting plate and the heat insulating plate, the heat exchanger is located in the heat exchange cavity, and the heat exchanger forms the heat exchange channel.

[0011] Preferably, the heat exchanger comprises a substrate and a heat exchange tube, the heat exchange tube is arranged on the substrate in a wave-like coil and covers the entire substrate, and the tube cavity of the heat exchange tube forms the heat exchange channel.

[0012] Preferably, there are a plurality of thermal insulation blocks, which are installed at intervals on the bottom wall of the vacuum chamber, and the storage chamber is supported on the thermal insulation blocks.

[0013] Preferably, an anti-thermal radiation coating is provided on the inner wall of the vacuum chamber and the inner wall of the storage container.

[0014] Preferably, a first pressure sensor is provided in the vacuum gap, and a second pressure sensor is provided in the storage chamber.

[0015] Preferably, the storage container comprises a plurality of storage tanks arranged in an array, each of the storage tanks is connected to the air inlet pipe and the air outlet pipe, and each of the storage tanks is provided with a third pressure sensor and a temperature sensor.

[0016] Preferably, a door opening communicating with the vacuum gap is provided on an end wall of one end of the vacuum chamber, and a working door for opening or closing the door opening is provided at the door opening, and the working door seals the door opening when closing the door opening.

[0017] Preferably, a plurality of supporting feet are arranged outside the bottom of the vacuum chamber and are spaced apart along its extending direction, and a trapezoidal reinforcement platform is formed on the top of the vacuum chamber protruding outward.

[0018] In the technical solution of the present invention, the storage container is installed in the storage chamber, and a vacuum is drawn between the vacuum chamber and the storage chamber to reduce the heat transfer path between the storage container, the storage chamber, the vacuum chamber and the air, thereby reducing the heat conduction of the storage chamber. The vacuum can also reduce the gas heat convection in the vacuum gap. Heat convection refers to the flow of gas due to temperature difference, which can cause heat transfer and loss. By vacuuming, the heat convection phenomenon can be reduced, and the heat transfer can be reduced, thereby improving the thermal efficiency and thermal insulation performance of the hydrogen storage tank; the storage chamber is supported in the vacuum chamber by an insulating pad so that the storage The chamber is in direct but not direct contact with the vacuum chamber, which reduces the heat transfer between the storage chamber and the vacuum chamber, thereby reducing the heat loss of the storage chamber and improving its thermal insulation effect. A heat exchange channel is opened on the wall of the storage chamber, and the storage chamber is continuously cooled by external cold drinks to ensure that the storage chamber is always maintained in a low temperature environment to prevent the gas from heating up and causing the pressure in the storage container to increase. At the same time, the vacuum gap between the storage chamber and the vacuum chamber prevents the gas from immediately diffusing when the storage container in the storage chamber is inevitably damaged, so as to facilitate the timely transportation of the remaining undamaged goods and reduce losses. The present invention stores gas at low temperature and medium pressure without the need for a high-pressure compressor and a high-grade hydrogen storage tank. The same volume of gas as high pressure can be stored through an ordinary storage tank and medium pressure, thereby reducing costs. At the same time, by reducing the heat exchange between the storage chamber and the external environment and providing a heat exchange channel on the wall of the storage chamber for continuous cooling, the gas storage device has a good thermal insulation effect, which slows down the rise in the temperature of the gas in the storage container and reduces the probability of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 This is a schematic structural diagram of a gas storage device according to an embodiment of the present invention;

[0021] Figure 2 It is a schematic structural diagram of a hidden part of a vacuum chamber wall of a gas storage device according to an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the structure of a storage chamber and a storage container of a gas storage device according to an embodiment of the present invention;

[0023] Figure 4 A schematic structural diagram of a storage chamber of a gas storage device according to an embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the structure of a storage container of a gas storage device according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the explosion structure of a baffle of a gas storage device according to one embodiment of the present invention;

[0026] Figure 7 It is a schematic structural diagram of a heat exchanger of a gas storage device according to an embodiment of the present invention.

[0027] Description of Figure Numbers:

[0028]

[0029]

[0030] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0031] The technical solution in this embodiment will be described clearly and completely below in conjunction with the drawings in this embodiment. Obviously, the described embodiment is only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications in this embodiment (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0036] In the present invention, the descriptions of directions such as "up", "down", "front", "back", "left", and "right" are as follows: Figure 1 The directions shown are for reference only and are used to explain the Figure 1 The relative position relationship between the components in the shown posture. If the specific posture changes, the directional indication will also change accordingly.

[0037] The present invention provides a gas storage device 1 .

[0038] Please combine Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 The gas storage device 1 of this embodiment includes a vacuum chamber 10, a storage chamber 20 and a storage container 30. A vacuum cavity is formed inside the vacuum chamber 10. An air inlet 12 and an air outlet 13 are provided on the vacuum chamber 10. The chamber is accommodated in the vacuum chamber 10 and is installed on the inner wall of the vacuum chamber 10 through a heat insulating pad (not shown). Each chamber wall of the storage chamber 20 is spaced from the inner wall of the corresponding vacuum chamber 10. , so as to form a vacuum gap 11 between the storage chamber 20 and the vacuum chamber 10, a heat exchange channel 216 is formed in the wall of the storage chamber 20, and an external cold source provides cooling for the storage chamber 20 through the heat exchange channel 216; a storage container 30 is installed in the storage chamber 20 and is used to store gas, and the storage container 30 takes in gas through an inlet pipe 31 connected to the air inlet 12, and exhausts gas through an outlet pipe 32 connected to the air outlet 13.

[0039] It should be noted that the storage chamber 20 is sealed, the pressure in the vacuum gap 11 does not exceed 100pa, there is also vacuum in the storage chamber, the pressure in the storage chamber 20 is 1100pa~2100pa, the thermal conductivity of the insulation pad is required to be lower than 0.02W / (M*K), and the insulation pad can be installed on any side of the inner wall of the vacuum chamber 10, as long as the stability of the storage chamber 20 is guaranteed, the fewer the insulation pads, the better the insulation performance of the storage chamber 20. In the subsequent embodiments of the present application, hydrogen is used as an example to illustrate the gas.

[0040] In the technical solution of the present invention, the storage container 30 is installed in the storage chamber 20, and a vacuum is drawn between the vacuum chamber 10 and the storage chamber 20 to reduce the heat transfer path between the storage container 30, the storage chamber 20, the vacuum chamber 10 and the air, thereby reducing the heat conduction of the storage chamber 20. The vacuum drawing can also reduce the gas heat convection in the vacuum gap 11. Heat convection refers to the flow of gas due to temperature difference, which can cause the transfer and loss of heat. Vacuuming can reduce heat convection and heat transfer, thereby improving the thermal efficiency and thermal insulation performance of the hydrogen storage tank; the storage chamber 20 is supported in the vacuum chamber 10 by a heat-insulating pad, so that the storage chamber 20 is in direct contact with the vacuum chamber 10, reducing the heat transfer between the storage chamber 20 and the vacuum chamber 10, thereby reducing the heat loss of the storage chamber 20 and improving its thermal insulation effect; and then a heat exchange channel 216 is opened on the wall of the storage chamber 20, through The storage chamber 20 is continuously cooled by an external cold source to ensure that the storage chamber 20 is always maintained in a low temperature environment, preventing the gas from heating up and causing the pressure in the storage container to increase; at the same time, the vacuum gap between the storage chamber and the vacuum chamber is convenient for the pressure transmitter to detect immediately when the storage container in the storage chamber is inevitably damaged, and take relevant measures immediately to prevent the gas from heating up and spreading immediately, so as to facilitate the timely transportation of the remaining undamaged goods and reduce losses; the present invention stores gas at low temperature and medium pressure, without the need for a high-pressure compressor and an advanced hydrogen storage tank 33, and can store the same volume of gas as high pressure through an ordinary storage tank and medium pressure. At the same time, by reducing the heat exchange between the storage chamber 20 and the external environment, and setting a heat exchange channel 216 on the wall of the storage chamber 20 for continuous cooling, the gas storage device 1 has a good insulation effect, slows down the rise in the temperature of the gas in the storage container, and reduces the probability of safety accidents.

[0041] In a specific embodiment, the gas is hydrogen, which is pressurized to a medium pressure of about 4MPa to 8MPa (which can be freely selected according to the pressure resistance of the container), and then the temperature of the hydrogen is reduced to an ultra-low temperature (absolute temperature 40K to 70K), and then stored in a storage container 30 in an insulated environment. At this time, the density of the hydrogen is about 40kg / m3 to 55kg / m3. In comparison, at room temperature, the density of hydrogen with a pressure of up to 75MPa is 40.9kg / m3. It can be seen that the solution of the present application does not require a high-pressure hydrogen storage tank 33 and a large-flow high-pressure compressor, and can reduce the volume of hydrogen to the volume of high-pressure hydrogen, thereby greatly reducing costs.

[0042] Please combine Figure 4 and Figure 6 In one embodiment, each chamber wall of the storage chamber 20 is formed by splicing a plurality of partitions 21, and a heat exchange channel 216 is formed inside each partition 21. An air inlet pipe 22 and an exhaust pipe 23 connected to each heat exchange channel 216 are installed on the outside of the storage chamber 20. The air inlet pipe 22 is connected to an external cold source through an air inlet 12, and the exhaust pipe 23 is connected to an air outlet 13. The storage chamber 20 is spliced ​​by a plurality of partitions 21, which can reduce costs. The partitions 21 are bonded by a silicone adhesive to seal the storage chamber 20. Heat exchange channels 216 are formed inside the plurality of partitions 21, which increases the heat dissipation contact area of ​​the heat exchange channel 216 with the inner cavity of the storage chamber 20 and improves the cooling efficiency. The heat exchange channel 216 is connected to an external cold source through an air inlet pipe 22, so that the storage chamber 20 is continuously kept within a preset temperature to ensure the stability of hydrogen.

[0043] See also Figure 6 Further, each partition 21 includes a heat conducting plate 211, a heat exchanger 212 and a heat insulating plate 213 which are arranged in sequence from the inside to the outside. A heat exchange cavity is formed between the heat conducting plate 211 and the heat insulating plate 213. The heat exchanger 212 is located in the heat exchange cavity, and the heat exchanger 212 forms a heat exchange channel 216. The inner side of the partition 21 is the heat conducting plate 211, so that the heat exchanger 212 and the storage chamber 20 can exchange temperature. The outer side of the partition 21 is low temperature, which prevents heat exchange between the vacuum gap 11 and the storage chamber 20 and reduces heat loss in the storage chamber 20.

[0044] See also Figure 7 Specifically, the heat exchanger 212 includes a base plate 214 and a heat exchange tube 215. The heat exchange tube 215 is arranged on the base plate 214 in a wave-like manner and covers the base plate 214. The tube cavity of the heat exchange tube forms a heat exchange channel 216. The heat exchange tube 215 is arranged on the base plate 214 in a wave-like manner, which can maximize the contact area on the base plate 214, so as to facilitate the temperature exchange between the heat exchanger 212 and the storage chamber 20.

[0045] In one embodiment, there are multiple heat-insulating pads, which are installed at intervals on the bottom wall of the vacuum chamber 10, and the storage chamber 20 is supported on the heat-insulating pads. When the heat-insulating pads are located on the bottom wall of the vacuum chamber 10, the storage chamber 20 can be supported with a minimum of pads without adding support on both sides or the top, thereby reducing the heat exchange between the storage chamber 20 and other components, thereby improving the heat preservation effect of the storage chamber 20.

[0046] Specifically, a smooth anti-thermal radiation coating is provided on the inner wall of the vacuum chamber 10 and the inner wall of the storage container 30. The anti-thermal radiation coating is sprayed on the inner wall of the vacuum chamber 10 and the inner wall of the storage container 30, and then smoothed. The surface roughness of the coating will affect the reflection and scattering characteristics of light. The smoothing treatment can reduce the roughness of the coating surface, improve the uniformity of reflection and the optical effect, and ensure that it effectively reflects, absorbs or scatters thermal radiation to achieve the expected heat insulation or thermal radiation shielding effect.

[0047] See also Figure 4 In one embodiment, a first pressure sensor 40 is provided in the vacuum gap 11, and a second pressure sensor (not shown) is provided in the storage chamber 20. Pressure sensors are provided in the vacuum gap 11 and the storage chamber 20 to monitor the pressure in the vacuum gap 11 and the storage chamber 20 in real time. When the pressure value of the first pressure sensor 40 or the pressure value of the second pressure sensor exceeds a preset range, the vacuum chamber 10 or the storage chamber 20 is evacuated by an external vacuum pump to ensure that the pressure value in the vacuum gap 11 and the storage chamber 20 is within the preset range, so as to ensure that the temperature rise rate of the gas is maintained at a low point.

[0048] See also Figure 5 Furthermore, the storage container 30 includes a plurality of storage tanks 33 arranged in an array, each storage tank 33 is connected to the air inlet pipe 31 and the air outlet pipe 32, and a third pressure sensor (not shown) and a temperature sensor (not shown) are arranged in each storage tank 33. The storage container 30 is composed of a plurality of independent storage tanks 33 arranged in an array, which can increase safety. Even if one storage tank 33 is damaged, it will not cause all gas leakage. At the same time, a third pressure sensor and a temperature sensor are arranged in each storage tank 33, which can monitor the state of the gas inside each storage tank 33 in real time. When one of the storage tanks 33 is damaged and leaks, it can be repaired and other storage tanks 33 can be transferred in time to ensure safety.

[0049] The present invention can monitor accidental damage inside the equipment (caused by various unpredictable and irresistible external factors) at any time through the combination of the first pressure sensor 40, the second pressure sensor, the third pressure sensor and the temperature sensor, thereby greatly reducing the probability of safety accidents.

[0050] Specifically, when one of the storage tanks 33 is slightly damaged, resulting in a slight leak, a powerful vacuum pump is immediately put into use to ensure that the absolute pressure in the vacuum chamber 10 does not exceed 1000 Pa, and then other storage tanks 33 are quickly transferred to avoid safety accidents.

[0051] See also Figure 1 In one embodiment, a door opening communicating with the vacuum gap 11 is provided on one end wall of the vacuum chamber 10, and a working door 14 for opening or closing the door opening is provided at the door opening, and the working door 14 seals the door opening when closing the door opening. The working door 14 communicating with the vacuum gap 11 is provided on the vacuum chamber 10, and the interior of the vacuum chamber 10 is routinely maintained through the working door 14, so as to maintain its functional integrity. When the working door 14 is closed, the door opening is sealed to avoid affecting the sealing of the vacuum chamber 10.

[0052] In one embodiment, a plurality of legs 15 are arranged at intervals along the extension direction of the bottom of the vacuum chamber 10, and the top of the vacuum chamber 10 protrudes outward to form a trapezoidal reinforcement platform 16. The legs 15 extend outward from the bottom side wall of the vacuum chamber 10 to support the vacuum chamber 10, prevent the bottom side wall of the vacuum chamber 10 from directly contacting the ground, thereby preventing the bottom side wall of the vacuum chamber 10 from contacting with debris on the ground to damage the vacuum chamber 10, and at the same time, the top side wall of the vacuum chamber 10 protrudes outward to form a trapezoidal reinforcement platform 16, which increases the strength of the top side wall of the vacuum chamber 10 and increases its safety.

[0053] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A gas storage device, characterized in that: include: A vacuum chamber, wherein a vacuum cavity is formed inside the vacuum chamber, and an air inlet and an air outlet are provided on the vacuum chamber; A storage chamber, the storage chamber is accommodated in the vacuum chamber and is installed on the inner wall of the vacuum chamber through a heat-insulating pad. Each chamber wall of the storage chamber is spaced from the corresponding inner wall of the vacuum chamber to form a vacuum gap between the storage chamber and the vacuum chamber. A heat exchange channel is formed in the chamber wall of the storage chamber, and an external cold source supplies cold to the storage chamber through the heat exchange channel. A storage container, which is installed in the storage chamber and is used to store the gas, and the storage container is connected to the gas inlet through an inlet pipe and is connected to the gas outlet through an outlet pipe; Each chamber wall of the storage chamber is formed by splicing a plurality of partitions, each of the partitions is formed with the heat exchange channel, an air inlet pipe and an exhaust pipe connected with each of the heat exchange channels are installed outside the storage chamber, the air inlet pipe is connected with an external cold source through the air inlet, and the exhaust pipe is connected with the air outlet; Each of the partitions comprises a heat conducting plate, a heat exchanger and a heat insulating plate arranged in sequence from the inside to the outside, a heat exchange cavity is formed between the heat conducting plate and the heat insulating plate, the heat exchanger is located in the heat exchange cavity, and the heat exchanger forms the heat exchange channel; The heat exchanger comprises a substrate and a heat exchange tube. The heat exchange tube is arranged on the substrate in a wave-like coil and covers the entire substrate. The tube cavity of the heat exchange tube forms the heat exchange channel.

2. The gas storage device according to claim 1, characterized in that: There are a plurality of thermal insulation blocks, which are installed at intervals on the bottom wall of the vacuum chamber, and the storage chamber is supported on the thermal insulation blocks.

3. The gas storage device according to any one of claims 1 to 2, characterized in that: The inner wall of the vacuum chamber and the inner wall of the storage container are both provided with an anti-thermal radiation coating.

4. The gas storage device according to any one of claims 1 to 2, characterized in that: A first pressure sensor is arranged in the vacuum gap, and a second pressure sensor is arranged in the storage chamber.

5. The gas storage device according to any one of claims 1 to 2, characterized in that: The storage container includes a plurality of storage tanks arranged in an array, each of the storage tanks is connected to the air inlet pipe and the air outlet pipe, and each of the storage tanks is provided with a third pressure sensor and a temperature sensor.

6. The gas storage device according to any one of claims 1 to 2, characterized in that: A door opening communicating with the vacuum gap is provided on an end wall of one end of the vacuum chamber, and a working door for opening or closing the door opening is provided at the door opening, and the working door seals the door opening when closing the door opening.

7. The gas storage device according to any one of claims 1 to 2, characterized in that: A plurality of supporting legs are arranged outside the bottom of the vacuum chamber and are spaced apart along the width direction thereof, and a trapezoidal reinforcement platform is formed on the top of the vacuum chamber protruding outward.

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