Cooling device for hydrogenation and hydrogenation system

Abstract

The utility model provides a cooling device for hydrogenation and a hydrogenation system. The cooling device for hydrogenation comprises a refrigerating circuit and a cooling pipeline, wherein a secondary refrigerant flows in the refrigerating circuit, and a cooling medium flows in the cooling pipeline; a buffer tank, a first heat exchange part and a second heat exchange part are arranged on the refrigeration loop, the first heat exchange part is provided with a first heat release channel communicating with the refrigeration loop and a first heat absorption channel communicating with the cooling pipeline, and the second heat exchange part is provided with a second heat absorption channel communicating with the refrigeration loop and a second heat release channel allowing hydrogen to flow through; an inlet of the first heat release channel communicates with an outlet of the buffer tank, an outlet of the first heat release channel communicates with an inlet of the second heat absorption channel, and an outlet of the second heat absorption channel communicates with an inlet of the buffer tank. According to the cooling device for hydrogenation, the secondary refrigerant is cooled through the cooling medium, so that the cooling efficiency of the secondary refrigerant on hydrogen is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and in particular to a cooling device for hydrogenation. The utility model also relates to a hydrogenation system provided with the cooling device for hydrogenation. Background Art

[0002] A hydrogen refueling station is a special place for filling hydrogen fuel into hydrogen storage bottles of hydrogen fuel cell vehicles, hydrogen internal combustion vehicles, or hydrogen-natural gas hybrid fuel vehicles. The current filling flow rate of a standard hydrogen refueling station is 3.6Kg / min. For hydrogen fuel cell vehicles with less onboard hydrogen storage, refueling can be completed within a few minutes. However, with the application of hydrogen fuel cell vehicles in heavy trucks and ships with large hydrogen storage, the long refueling time will increase the waiting time of vehicles, seriously restricting the achievement of mileage indicators for hydrogen fuel cell heavy trucks and ships.

[0003] In order to ensure the safety of the filling process, according to the hydrogen filling standards of hydrogen filling stations, the temperature of the on-board hydrogen storage cylinder shall not exceed 85°C during the entire filling process. In order to avoid overheating of the on-board hydrogen storage cylinder during the filling process, the hydrogen is usually cooled before it flows through the hydrogen filling machine to reduce the hydrogen filling temperature and complete the filling. In the process of cooling the hydrogen, there are problems such as waste of cooling medium, which is not conducive to reducing production costs. Therefore, how to optimize the hydrogen cooling device to improve the cooling efficiency of hydrogen has become a technical problem that technicians in this field urgently need to solve. Utility Model Content

[0004] In view of this, the utility model aims to provide a cooling device for hydrogenation to improve the cooling efficiency of hydrogen.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A cooling device for hydrogenation, comprising a refrigeration circuit with a coolant flowing therein, and a cooling pipeline with a cooling medium flowing therein;

[0007] The refrigeration circuit is provided with a cache tank, a first heat exchange part and a second heat exchange part, the first heat exchange part has a first heat release channel connected to the refrigeration circuit and a first heat absorption channel connected to the cooling pipeline, the second heat exchange part has a second heat absorption channel connected to the refrigeration circuit and a second heat release channel for hydrogen gas to flow through;

[0008] The inlet of the first heat release channel is communicated with the outlet of the cache tank, the outlet of the first heat release channel is communicated with the inlet of the second heat absorption channel, and the outlet of the second heat absorption channel is communicated with the inlet of the cache tank.

[0009] Furthermore, the cache tank is provided with a cooling channel, and the cooling channel is connected to the cooling pipeline.

[0010] Furthermore, the cooling pipeline is provided with a pumping section, and a gasification section and a gas storage tank sequentially located downstream of the cooling channel;

[0011] The pumping unit is used to pump the cooling medium into the gasification unit. After the cooling medium is gasified by the gasification unit, it is stored in the gas storage tank.

[0012] Furthermore, the gas storage tank is provided with a gas supply pipe and a control valve for connecting or disconnecting the connection between the gas storage tank and the gas supply pipe.

[0013] Furthermore, the cooling channel is arranged inside the cache tank, or the cooling channel is covered on the outside of the cache tank.

[0014] Furthermore, it also includes a storage tank storing the cooling medium, the inlet end of the cooling pipeline is connected to the storage tank, and the storage tank transports the cooling medium to the cooling pipeline.

[0015] Furthermore, the cooling pipeline is provided with a flow regulating part located upstream of the first heat exchange part, and the flow regulating part is used to regulate the flow of the cooling medium.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] In the cooling device for hydrogenation described in the utility model, the cooling medium in the cooling pipeline absorbs the heat of the refrigerant in the first heat release channel through the first heat absorption channel in the first heat exchange part, and can cool the refrigerant flowing into the second heat absorption channel of the second heat exchange part, thereby facilitating improvement of the cooling efficiency of the second heat absorption channel on the hydrogen in the second heat release channel.

[0018] In addition, by providing a cooling channel, and the cooling medium after heat exchange with the coolant flows into the cooling channel and is used to cool the cache tank, it is beneficial to further improve the cooling effect on the coolant and to improve the utilization rate of the cooling medium. Providing a pumping section, a gasification section and a gas storage tank on the cooling pipeline is beneficial to the transportation and reuse of the cooling medium, thereby helping to reduce the waste of the cooling medium. By providing a gas delivery pipe and a control valve on the gas storage tank, it is beneficial to reuse the gasified cooling medium and improve the utilization rate of the cooling medium. The cooling channel is arranged along the circumference of the cache tank, which is not only convenient for layout and implementation, but also helps to improve the cooling effect of the cooling medium on the cache tank.

[0019] In addition, the storage tank is used to store the cooling medium, which is conducive to the continuous transportation of the cooling medium on the cooling pipeline. By arranging a flow regulating part upstream of the first heat exchange part, it is conducive to regulating the flow of the cooling medium, thereby improving the cooling effect of the cooling medium on the coolant. Liquid nitrogen has a good cooling effect and is conducive to solving the problem of high power consumption of the cooling device in the prior art.

[0020] In addition, another object of the utility model is to propose a hydrogenation system, including a hydrogen storage device, a hydrogenator, and a hydrogen pipeline for transporting hydrogen in the hydrogen storage device to the hydrogenator, the hydrogenation system also includes a hydrogenation cooling device as described above, and the second heat release channel in the hydrogenation cooling device is connected to the hydrogen pipeline.

[0021] The hydrogenation system of the utility model cools the hydrogen flowing to the hydrogenator by arranging the above hydrogenation cooling device, and has good cooling efficiency, thereby facilitating improving the hydrogenation efficiency of the hydrogenator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the first structure of the cooling device for hydrogenation according to the first embodiment of the utility model;

[0024] Figure 2 This is a second structural schematic diagram of the hydrogenation cooling device according to the first embodiment of the utility model;

[0025] Figure 3 This is a third structural schematic diagram of the hydrogenation cooling device described in Example 1 of the utility model.

[0026] Description of reference numerals:

[0027] 1. Refrigeration circuit; 2. Hydrogen pipeline; 3. Cooling pipeline; 4. Second heat exchange unit; 5. First heat exchange unit; 6. Buffer tank; 7. Gas storage tank; 8. Storage tank; 9. Hydrogen storage device; 10. Hydrogen filling machine;

[0028] 101. Circulation pump;

[0029] 301, pumping unit; 302, flow regulating unit; 303, cooling channel; 304, gasification unit;

[0030] 401, second heat absorption channel; 402, second heat release channel;

[0031] 501, a first heat release channel; 502, a first heat absorption channel;

[0032] 701. Gas pipeline. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0034] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0036] Embodiment 1

[0037] This embodiment relates to a cooling device for hydrogenation, which is intended to improve the cooling efficiency of hydrogen.

[0038] In terms of overall structure, the hydrogenation cooling device comprises a refrigeration circuit 1 with a coolant flowing therein, and a cooling pipeline 3 with a cooling medium flowing therein. The refrigeration circuit 1 is provided with a buffer tank 6, a first heat exchange part 5 and a second heat exchange part 4.

[0039] The first heat exchange part 5 has a first heat release channel 501 connected to the refrigeration circuit 1 and a first heat absorption channel 502 connected to the cooling pipeline 3. The second heat exchange part 4 has a second heat absorption channel 401 connected to the refrigeration circuit 1 and a second heat release channel 402 for hydrogen gas to flow through.

[0040] The inlet of the first heat release channel 501 is connected to the outlet of the cache tank 6 , the outlet of the first heat release channel 501 is connected to the inlet of the second heat absorption channel 401 , and the outlet of the second heat absorption channel 401 is connected to the inlet of the cache tank 6 .

[0041] In the above structure, the buffer tank 6, the first heat release channel 501 and the second heat absorption channel 401 are arranged in sequence along the flow path of the coolant, which is conducive to the recycling of the coolant.

[0042] The cooling medium exchanges heat with the coolant through the first heat exchange part 5 to cool the coolant flowing into the second heat exchange part 4. The second heat exchange part 4 is used for heat exchange with the hydrogen to cool the hydrogen.

[0043] In the cooling device for hydrogenation of this embodiment, the cooling medium in the cooling pipeline 3 absorbs the coolant in the first heat release channel 501 through the first heat absorption channel 502 in the first heat exchange part 5 for heat exchange, and can cool the coolant flowing into the second heat absorption channel 401 of the second heat exchange part 4, thereby facilitating improvement of the cooling efficiency and cooling effect of the second heat absorption channel 401 on the hydrogen in the second heat release channel 402.

[0044] Based on the above overall introduction, an exemplary structure of the cooling device for hydrogenation of this embodiment is as follows: Figure 1 as shown in .

[0045] In this embodiment, the first heat exchange part 5 and the second heat exchange part 4 can both adopt the heat exchanger in the prior art, the first heat absorption channel 502 and the first heat release channel 501 are separated from each other, and the second heat absorption channel 401 and the second heat release channel 402 are separated from each other, so as to improve the cooling effect of the cooling medium on the cooling machine and the cooling effect of the cooling medium on the hydrogen. In specific implementation, the structural form of the first heat exchange part 5 and the second heat exchange part 4 can be selected according to the use requirements.

[0046] The buffer tank 6 in this embodiment is connected in series to the refrigeration circuit 1. A circulating pump 101 is provided at the outlet of the buffer tank 6. The circulating pump 101 is used to pump the coolant in the buffer tank 6 into the refrigeration circuit 1 and make the coolant flow along the refrigeration circuit 1. Figure 1 Flow circulates in the direction indicated by the arrow.

[0047] In this embodiment, the cross-sectional area of ​​the buffer tank 6 is larger than the cross-sectional area of ​​the pipeline on the refrigeration circuit 1, so that the effect of caching the secondary coolant can be achieved. By cooperating with the circulating pump 101 and the buffer tank 6, the flow rate of the secondary coolant on the refrigeration circuit 1 can be changed, so that the flow rate of the secondary coolant matches the flow rate of the cooling medium and the hydrogen, achieving a better cooling effect.

[0048] In addition, in this embodiment, the structure of the buffer tank 6 is Figure 1 As shown in the columnar shape, the cross-sectional areas at both ends of the cache tank 6 are gradually reduced in the direction away from the cache tank 6. Other structural forms can also be used as long as the use requirements are met.

[0049] In this embodiment, when the brine flowing out of the buffer tank 6 flows to the first heat exchange part 5, the brine temperature will rise due to the heat exchange between the surrounding environment and the refrigeration. At this time, if the brine is directly exchanged with hydrogen, the cooling efficiency is low. Therefore, in this embodiment, the brine is cooled by the first heat exchange part 5, which is conducive to ensuring the temperature of the brine flowing into the second heat exchange part 4, thereby improving the heat exchange efficiency between the brine and the hydrogen, and further improving the cooling efficiency of the hydrogen.

[0050] It should be noted that the refrigerant in this embodiment can be a refrigerant used in the air conditioning refrigeration system in the prior art, or can be a refrigerant such as ethylene glycol that can exchange heat with hydrogen. The refrigerant can be determined according to the use requirements and is not specifically limited here.

[0051] As a preferred embodiment, a cooling channel 303 is provided on the cache tank 6, and the cooling channel 303 is connected to the cooling pipeline 3. The cooling channel 303 is connected in series with the cooling pipeline 3. The cooling medium after heat exchange with the coolant can flow into the cooling channel 303 to cool the cache tank 6. By providing the cooling channel 303, the cooling medium after heat exchange can flow into the cooling channel 303 and cool the cache tank 6, which is not only conducive to improving the utilization rate of the cooling medium, but also conducive to the cooling of the coolant in the cache tank 6, thereby further improving the cooling effect on the hydrogen.

[0052] In this embodiment, the cooling channel 303 is covered on the outside of the buffer tank 6. Figure 1 In addition to the structure shown in the figure, a structure that is spirally wound on the cache tank 6 can also be used, as long as the cooling channel 303 is located outside the cache tank 6 and the cache tank 6 can be cooled by the cooling medium. Figure 2 and Figure 3 As shown in , the cooling channel 303 can also be set inside the cache tank 6. In this case, the coolant in the cache tank 6 can also be cooled through the cooling channel 303.

[0053] Specifically, after the cooling medium exchanges heat with the coolant to cool the coolant, the cooling medium still has a relatively low temperature. By flowing the cooling medium into the cooling channel 303, it is beneficial to improve the utilization rate of the cooling medium and also to improve the cooling effect on the coolant.

[0054] like Figure 1 As shown in the figure, the cooling pipeline 3 in this embodiment is provided with a pumping part 301, and a gasification part 304 and a gas storage tank 7 which are sequentially located downstream of the cooling channel 303. The pumping part 301 is used to pump the cooling medium into the gasification part 304, and the cooling medium is stored in the gas storage tank 7 after being gasified by the gasification part 304. Here, the pumping part 301, the gasification part 304 and the gas storage tank 7 are provided on the cooling pipeline 3, which is conducive to the transportation and reuse of the cooling medium, thereby helping to reduce the waste of the cooling medium.

[0055] In terms of specific structure, the pumping part 301 is a cryogenic pump in the prior art, and the gasification part 304 is an air-temperature gasifier arranged on the cooling pipeline 3. The air-temperature gasifier utilizes natural convection of air to heat the cryogenic liquid in the cooling pipeline 3, so that the cooling medium is completely converted into gas. In addition, the gas storage tank 7 is provided with a gas pipe 701, and a control valve for connecting or disconnecting the connection between the gas storage tank 7 and the gas pipe 701. Through the provision of the gas pipe 701, the gas in the gas storage tank 7 can be used for purging, thereby realizing the reuse of the cooling medium. Compared with the solution of directly removing the cooling medium in the prior art, it is more conducive to reducing production costs. In order to improve the purging effect of the gas pipe 701, a purging head in the prior art can also be provided at the outlet end of the gas pipe 701 to further improve the purging effect of the gas.

[0056] like Figure 1 As shown in , the cooling device for hydrogenation in this embodiment also includes a storage tank 8 for storing a cooling medium, and the inlet end of the cooling pipeline 3 is connected to the storage tank 8, and the storage tank 8 delivers the cooling medium to the cooling pipeline 3. Here, the cooling medium is stored by the storage tank 8, which is conducive to the continuous delivery of the cooling medium on the cooling pipeline 3, thereby improving the sustainability of the cooling effect on the hydrogen. The above-mentioned cryogenic pump is specifically arranged on the cooling pipeline 3 between the storage tank 8 and the first heat absorption channel 502, so as to facilitate the adjustment of the delivery effect of the cooling medium.

[0057] In addition, the cooling pipeline 3 is provided with a flow regulating part 302 located upstream of the first heat exchange part 5, and the flow regulating part 302 is used to regulate the flow of the cooling medium. This is also conducive to preventing the problem that when the temperature of the cooling medium itself is low (for example, the temperature of liquid nitrogen is -196°C), the cooling medium is directly used to cool the coolant with a large flow rate, resulting in freezing of the coolant, and thus the coolant cannot be pre-cooled. In specific implementation, the flow regulating part 302 can adopt a flow regulating valve in the prior art, which is not only simple in structure and mature in product, but also has a good effect on regulating the flow.

[0058] As a preferred implementation, the cooling medium is liquid nitrogen, which not only has low cost and good refrigeration effect, but also helps to solve the problem of high power consumption of the cooling device in the prior art.

[0059] When the cooling device for hydrogenation in this embodiment is in use, the circulating pump 101 pumps the coolant in the cache tank 6 into the refrigeration circuit 1. The coolant first exchanges heat with the liquid nitrogen in the cooling pipeline 3 through the first heat exchange part 5. The coolant thereby reduces the temperature of the coolant flowing into the second heat exchange part 4 and increases the temperature of the liquid nitrogen, so that the cooled coolant exchanges heat with the hydrogen through the second heat exchange part 4, thereby improving the cooling efficiency of the hydrogen. When the coolant that has been heated up after heat exchange with the hydrogen flows through the cache tank 6 again, it can be cooled for the first time, and after passing through the first heat exchange part 5, it can be cooled for the second time, and the cycle is repeated to achieve continuous cooling of the hydrogen.

[0060] At the same time, the pumping unit 301 transports the liquid nitrogen in the storage tank 8 to the cooling pipeline 3. After the liquid nitrogen in the cooling pipeline 3 exchanges heat with the refrigerant in the first heat exchange unit 5, the liquid nitrogen flowing out of the first heat absorption channel 502 has a lower temperature. After flowing into the cooling channel 303, the liquid nitrogen can still cool the cache tank 6, thereby improving the cache and primary cooling effect of the cache tank 6 on the refrigerant. The liquid nitrogen flowing out of the cooling channel 303 will be partially vaporized and converted into nitrogen, and part of it will remain in liquid state. After flowing through the vaporization unit 304, the liquid nitrogen and nitrogen in the mixed state can be completely converted into nitrogen and stored in the gas storage tank 7, and the nitrogen in the gas storage tank 7 can be used for purging through the gas pipe 701, so as to realize the utilization rate of liquid nitrogen, and help to avoid the waste of liquid nitrogen, which can help to reduce the cost of the cooling device.

[0061] The hydrogenation cooling device in this embodiment not only has a simple structure and is easy to arrange and implement, but also has high cooling efficiency for hydrogen and high utilization rate of the cooling medium. In addition, the energy consumption of the entire cooling device is low, which is beneficial to reducing the power load of the cooling device, thereby facilitating energy conservation and emission reduction.

[0062] Embodiment 2

[0063] This embodiment also relates to a hydrogenation system, including a hydrogen storage device 9, a hydrogenation machine 10, and a hydrogen pipeline 2 for transporting hydrogen in the hydrogen storage device 9 to the hydrogenation machine 10. The hydrogenation system also includes the hydrogenation cooling device in the first embodiment, and the second heat release channel 402 in the hydrogenation cooling device is connected to the hydrogen pipeline 2 for cooling the hydrogen in the hydrogen pipeline 2.

[0064] The second heat release channel 402 in the first embodiment is connected in series to the hydrogen pipeline 2, so that the hydrogen flows through the second heat release channel 402 and is continuously cooled by the coolant in the second heat exchange part 4. The hydrogen storage device 9 is used to store hydrogen, and the hydrogen filling machine 10 is connected to the hydrogen storage device 9 through the hydrogen pipeline 2, so as to fill the hydrogen cylinder with hydrogen. The hydrogen storage device 9 and the hydrogen filling machine 10 can both adopt products in the prior art.

[0065] The hydrogenation system of this embodiment cools the hydrogen flowing to the hydrogenation machine 10 by providing the above-mentioned hydrogenation cooling device, and has good cooling efficiency, thereby facilitating improving the hydrogenation efficiency of the hydrogenation machine 10 and shortening the time required for hydrogenation.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cooling device for hydrogenation, characterized in that: It comprises a refrigeration circuit (1) in which a refrigerant flows, and a cooling pipeline (3) in which a cooling medium flows; The refrigeration circuit (1) is provided with a buffer tank (6), a first heat exchange part (5) and a second heat exchange part (4); the first heat exchange part (5) has a first heat release channel (501) connected to the refrigeration circuit (1) and a first heat absorption channel (502) connected to the cooling pipeline (3); the second heat exchange part (4) has a second heat absorption channel (401) connected to the refrigeration circuit (1) and a second heat release channel (402) for hydrogen gas to flow through; The inlet of the first heat release channel (501) is connected to the outlet of the cache tank (6), the outlet of the first heat release channel (501) is connected to the inlet of the second heat absorption channel (401), and the outlet of the second heat absorption channel (401) is connected to the inlet of the cache tank (6).

2. The cooling device for hydrogenation according to claim 1, characterized in that: The cache tank (6) is provided with a cooling channel (303), and the cooling channel (303) is in communication with the cooling pipeline (3).

3. The cooling device for hydrogenation according to claim 2, characterized in that: The cooling pipeline (3) is provided with a pumping part (301), and a gasification part (304) and a gas storage tank (7) which are sequentially located downstream of the cooling channel (303); The pumping section (301) is used to pump the cooling medium into the gasification section (304); after the cooling medium is gasified by the gasification section (304), it is stored in the gas storage tank (7).

4. The cooling device for hydrogenation according to claim 3, characterized in that: The gas storage tank (7) is provided with a gas delivery pipe (701) and a control valve for connecting or disconnecting the connection between the gas storage tank (7) and the gas delivery pipe (701).

5. The cooling device for hydrogenation according to claim 2, characterized in that: The cooling channel (303) is arranged inside the cache tank (6), or the cooling channel (303) is covered on the outside of the cache tank (6).

6. The cooling device for hydrogenation according to claim 1, characterized in that: It also includes a storage tank (8) storing the cooling medium, the inlet end of the cooling pipeline (3) is connected to the storage tank (8), and the storage tank (8) transports the cooling medium to the cooling pipeline (3).

7. The hydrogenation cooling device according to any one of claims 1 to 6, characterized in that: The cooling pipeline (3) is provided with a flow regulating part (302) located upstream of the first heat exchange part (5), and the flow regulating part (302) is used to regulate the flow of the cooling medium.

8. A hydrogenation system, comprising a hydrogen storage device (9), a hydrogenation machine (10), and a hydrogen pipeline (2) for transporting hydrogen in the hydrogen storage device (9) to the hydrogenation machine (10), characterized in that: The hydrogenation system further comprises a cooling device for hydrogenation according to any one of claims 1 to 7, and the second heat release channel (402) in the cooling device for hydrogenation is connected to the hydrogen pipeline (2).

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