Conduction oil discharge system of solid hydrogen storage device

Abstract

The invention relates to the technical field of hydrogen storage, in particular to a heat conduction oil discharging system of a solid hydrogen storage device, which comprises an oil inlet pipeline, an oil outlet pipeline, a heat conduction oil furnace, two gas input pipelines, two oil gas discharging pipelines, a heat conduction oil discharging pipeline and a heat conduction oil collecting device, the heat-conducting oil furnace is communicated with the hydrogen storage device through an oil inlet pipeline and an oil outlet pipeline; the two gas input pipelines are communicated with the oil inlet pipeline and the oil outlet pipeline; the first oil-gas discharge pipeline is communicated with the oil inlet pipeline and the heat-conducting oil discharge pipeline; the second oil-gas discharge pipeline is communicated with the oil outlet pipeline and the heat-conducting oil discharge pipeline; the two gas input pipelines and the two oil gas discharge pipelines are all provided with gas control valves; the oil inlet pipeline and the oil outlet pipeline are respectively provided with an oil control valve; the heat-conducting oil discharge pipeline is communicated with an emptying port of the hydrogen storage device, the heat-conducting oil collecting device and the two oil gas discharge pipelines; the conduction oil collecting device is located at the lowest point of the system. By means of the system, heat conduction oil in the hydrogen storage device can be discharged in time.

Description

Technical Field

[0001] The present application relates to the field of hydrogen storage technology, and in particular to a heat transfer oil discharge system for a solid-state hydrogen storage device. Background Art

[0002] At present, in the process of charging and discharging hydrogen, a large amount of reaction heat needs to be circulated, withdrawn and introduced in time in a high-temperature solid-state hydrogen storage device, and the reaction temperature is relatively high, 200℃~400℃. Therefore, a heat transfer oil heat exchange pipe is generally set in a large-capacity high-temperature solid-state hydrogen storage device for the circulation of heat transfer oil to carry out the cyclic input and output of the reaction heat of charging and discharging hydrogen. At the required reaction temperature, the commonly used heat transfer oil generally needs to be pressurized to keep it in a liquid state without vaporizing and deteriorating, and its freezing point is relatively high, solidifying and not flowing at about 12℃. When the outside temperature is low and the system is discontinued for a long time, the pipeline valves in the system are blocked by the solidified heat transfer oil and cannot be started. Extra manpower and material resources are required to heat and melt the heat transfer oil, resulting in a large waste of time and personnel. On the other hand, the heat transfer oil in the high-temperature solid-state hydrogen storage device needs to be discharged in time after the hydrogen charging and discharging is completed so that the solid-state hydrogen storage device can be moved.

[0003] At present, pumps are mostly used to pump out the thermal oil in large-capacity solid-state hydrogen storage devices. When using a pump to pump out the thermal oil, there is a high possibility that the oil will be emptied, which has a great impact on the pump and affects the life of the pump, thereby increasing the equipment and maintenance costs. Summary of the invention

[0004] The purpose of the present application is to provide a thermal oil discharge system for a solid-state hydrogen storage device, which to a certain extent solves the technical problem in the prior art of using a pump to discharge the thermal oil in a large-capacity solid-state hydrogen storage device, and when using a pump to pump the thermal oil, there is a high possibility of vacuum, which has a great impact on the pump and affects the life of the pump, thereby increasing the equipment and maintenance costs.

[0005] The present application provides a heat transfer oil discharge system for a solid hydrogen storage device, which is applied to a hydrogen storage device. The heat transfer oil discharge system for the solid hydrogen storage device comprises: an oil inlet pipeline, an oil outlet pipeline, a heat transfer oil furnace, a first gas input pipeline, a second gas input pipeline, a first oil and gas discharge pipeline, a second oil and gas discharge pipeline, a heat transfer oil discharge pipeline, a heat transfer oil delivery pipeline, and a heat transfer oil collection device;

[0006] Wherein, the outlet end of the thermal oil furnace is connected to the inlet end of the thermal oil chamber of the hydrogen storage device via the oil inlet pipeline; the inlet end of the thermal oil furnace is connected to the outlet end of the thermal oil chamber of the hydrogen storage device via the oil outlet pipeline; the first gas input pipeline is connected to the oil inlet pipeline, and the second gas input pipeline is connected to the oil outlet pipeline; the oil inlet pipeline connected between the hydrogen storage device and the first gas input pipeline is connected to the first oil and gas exhaust pipeline; the oil outlet pipeline connected between the hydrogen storage device and the second gas input pipeline is connected to the second oil and gas exhaust pipeline;

[0007] The first gas input pipeline, the second gas input pipeline, the first oil and gas exhaust pipeline and the second oil and gas exhaust pipeline are all provided with gas control valves; the oil inlet pipeline connected between the first gas input pipeline and the thermal oil furnace and the oil outlet pipeline connected between the second gas input pipeline and the thermal oil furnace are all provided with oil control valves; the thermal oil exhaust pipeline is respectively connected with the exhaust port of the hydrogen storage device, the first oil and gas exhaust pipeline and the second oil and gas exhaust pipeline, and the first oil exhaust valve is provided on the pipeline of the thermal oil exhaust pipeline located on the first oil and gas exhaust pipeline and the second oil and gas exhaust pipeline close to the hydrogen storage device; the thermal oil collecting device is connected with the thermal oil exhaust pipeline through the thermal oil delivery pipeline, and the thermal oil delivery pipeline is provided with a thermal oil exhaust main valve; along the vertical direction, the thermal oil collecting device is located at the lowest point relative to other structures of the thermal oil exhaust system of the solid hydrogen storage device and the hydrogen storage device.

[0008] In the above technical solution, further, the thermal oil discharge system of the solid hydrogen storage device also includes a cooling device, which is arranged on the side of the thermal oil delivery pipeline and extends along the extension direction of the thermal oil delivery pipeline.

[0009] In any of the above technical solutions, further, along the extension direction of the heat transfer oil delivery pipeline, a water inlet pipe and a water outlet pipe are respectively provided at both ends of the cooling device, and valves are provided on the water inlet pipe and the water outlet pipe.

[0010] In any of the above technical solutions, further, the heat transfer oil collecting device is arranged above the ground, and the heat transfer oil collecting device is provided with an exhaust pipeline connected with its inner cavity and the outside.

[0011] In any of the above technical solutions, further, the heat transfer oil collecting device is arranged below the ground, and the heat transfer oil collecting device is provided with an exhaust pipeline connected to its inner cavity, and the exhaust pipeline extends above the ground.

[0012] In any of the above technical solutions, further, an exhaust valve is provided on the exhaust pipeline.

[0013] In any of the above technical solutions, further, the heat transfer oil discharge system of the solid hydrogen storage device also includes a first auxiliary oil discharge pipeline, a second auxiliary oil discharge pipeline and a collection pipeline; wherein the two ends of the first auxiliary oil discharge pipeline are respectively connected to the oil inlet pipeline connected between one of the oil control valves and the heat transfer oil furnace and the collection pipeline;

[0014] The two ends of the second auxiliary oil drain pipeline are respectively connected to the oil outlet pipeline connected between the other oil control valve and the thermal oil furnace and the collecting pipeline; the collecting pipeline is connected to the thermal oil discharge pipeline located on the side of the first oil and gas discharge pipeline and the second oil and gas discharge pipeline away from the hydrogen storage device, and the collecting pipeline is provided with a second oil drain valve.

[0015] In any of the above technical solutions, further, the outlet end of the heat transfer oil collection device is connected to the heat transfer oil furnace.

[0016] In any of the above technical solutions, further, the heat transfer oil collection device is provided with a pressure detection component

[0017] In any of the above technical solutions, further, the heat transfer oil collecting device is provided with a first temperature detection component.

[0018] In any of the above technical solutions, further, the heat transfer oil collecting device is provided with a liquid level detection component.

[0019] In any of the above technical solutions, further, the heat transfer oil discharge system of the solid-state hydrogen storage device also includes a total input pipeline, and the total input pipeline is respectively connected to the inlet end of the first gas input pipeline and the inlet end of the second gas input pipeline.

[0020] In any of the above technical solutions, further, the oil inlet pipeline is detachably connected to the inlet end of the heat transfer oil chamber of the hydrogen storage device.

[0021] In any of the above technical solutions, further, the oil outlet pipeline is detachably connected to the outlet end of the heat transfer oil chamber of the hydrogen storage device.

[0022] In any of the above technical solutions, further, the heat transfer oil discharge pipeline is detachably connected to the exhaust port of the hydrogen storage device.

[0023] In any of the above technical solutions, further, an inlet valve is provided on the oil inlet pipeline connected to the inlet end of the hydrogen storage device through the first oil and gas exhaust pipeline.

[0024] In any of the above technical solutions, further, an outlet valve is provided on the oil outlet pipeline that is connected to the outlet end of the hydrogen storage device through the second oil and gas outlet pipeline.

[0025] In any of the above technical solutions, further, both the first gas input pipeline and the second gas input pipeline are provided with a one-way valve.

[0026] Compared with the prior art, the beneficial effects of this application are:

[0027] The heat transfer oil discharge system of the solid-state hydrogen storage device provided in the present application is particularly suitable for quickly draining the heat transfer oil on a large-capacity high-temperature solid-state hydrogen storage device. The heat transfer oil collecting device is located at the lowest point of the entire system, and valves are set at the low points of all pipelines in the system. Then the heat transfer oil in the hydrogen storage device and the pipeline is collected and discharged into the heat transfer oil collecting device. When the oil is discharged at room temperature, the heat transfer oil in the equipment can be directly discharged into the heat transfer oil collecting device at the lowest point by gravity; when the oil is discharged at high temperature, nitrogen is used to pressurize the heat transfer oil in the hydrogen storage device and discharge it into the heat transfer oil collecting device at the lowest point. Before the heat transfer oil enters the underground heat transfer oil collecting device, a cooling device is set to pass circulating cooling water, and the high-temperature heat transfer oil is cooled and discharged into the underground heat transfer oil collecting device. Finally, the exhaust valve is opened to release the nitrogen in the system to ensure the safety and reliability of the system.

[0028] Moreover, the thermal oil discharge system of the solid-state hydrogen storage device does not use a pump, and the thermal oil in the system can be quickly and timely discharged, avoiding the increase in operation and maintenance costs caused by the solidification of the thermal oil in the system at low temperatures. Moreover, since no pump is used, the problem of pump evacuation is avoided, thereby reducing the cost of equipment and maintenance. At the same time, a cooling structure is adopted to shorten the entire cooling time to the operating temperature, effectively saving equipment maintenance and operation costs, and effectively shortening the turnover time of large-capacity solid-state hydrogen storage devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic structural diagram of a thermal oil discharge system for a solid-state hydrogen storage device provided in an embodiment of the present application.

[0031] Reference numerals:

[0032] 100-heat transfer oil discharge system of solid hydrogen storage device, 1-oil inlet pipeline, 1001-first hose, 2-oil outlet pipeline, 201-second hose, 3-heat transfer oil furnace, 4-first gas input pipeline, 5-second gas input pipeline, 6-first oil and gas discharge pipeline, 7-second oil and gas discharge pipeline, 8-heat transfer oil discharge pipeline, 81-third hose, 82-pressure detection component, 9-heat transfer oil delivery pipeline, 10-heat transfer oil collection device, 101-exhaust pipeline, 102-exhaust valve, 104-first temperature detection component, 105-liquid level detection component, 11-first gas control valve Door, 12-second gas control valve, 13-third gas control valve, 14-fourth gas control valve, 15-first oil control valve, 16-second oil control valve, 17-first oil drain valve, 18-thermal oil drain main valve, 19-cooling device, 191-liquid inlet pipe, 192-liquid outlet pipe, 193-valve, 20-inlet valve, 21-outlet valve, 22-check valve, 23-first auxiliary oil drain pipeline, 24-second auxiliary oil drain pipeline, 25-summarizing pipeline, 26-second oil drain valve, 27-recovery pipeline, 28-total input pipeline, 200-hydrogen storage device. DETAILED DESCRIPTION

[0033] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0034] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0035] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] Refer to the following Figure 1 A thermal oil discharge system of a solid-state hydrogen storage device according to some embodiments of the present application is described.

[0039] See also Figure 1 As shown, the embodiment of the present application provides a heat transfer oil discharge system 100 for a solid hydrogen storage device, which is applied to a hydrogen storage device 200. The heat transfer oil discharge system 100 for a solid hydrogen storage device includes: an oil inlet pipeline 1, an oil outlet pipeline 2, a heat transfer oil furnace 3, a first gas input pipeline 4, a second gas input pipeline 5, a first oil and gas discharge pipeline 6, a second oil and gas discharge pipeline 7, a heat transfer oil discharge pipeline 8, and a heat transfer oil collection device 10;

[0040] Among them, the outlet end of the thermal oil furnace 3 is connected to the inlet end of the thermal oil chamber of the hydrogen storage device 200 via the oil inlet pipeline 1; the inlet end of the thermal oil furnace 3 is connected to the outlet end of the thermal oil chamber of the hydrogen storage device 200 via the oil outlet pipeline 2; the first gas input pipeline 4 is connected to the oil inlet pipeline 1, and the second gas input pipeline 5 is connected to the oil outlet pipeline 2; the oil inlet pipeline 1 connected between the hydrogen storage device 200 and the first gas input pipeline 4 is connected to the first oil and gas exhaust pipeline 6; the oil outlet pipeline 2 connected between the hydrogen storage device 200 and the second gas input pipeline 5 is connected to the second oil and gas exhaust pipeline 7;

[0041] The first gas input pipeline 4, the second gas input pipeline 5, the first oil and gas discharge pipeline 6 and the second oil and gas discharge pipeline 7 are all provided with gas control valves, and in order to distinguish the gas control valves at different positions, they are respectively named as follows: the gas control valve on the second gas input pipeline 5 is the first gas control valve 11, the gas control valve on the first oil and gas discharge pipeline 6 is the second gas control valve 12, the gas control valve on the second oil and gas discharge pipeline 7 is the third gas control valve 13, and the gas control valve on the first gas input pipeline 4 is the fourth gas control valve 14;

[0042] Oil control valves are provided on the oil inlet pipeline 1 connected between the first gas input pipeline 4 and the thermal oil furnace 3 and on the oil outlet pipeline 2 connected between the second gas input pipeline 5 and the thermal oil furnace 3. In order to distinguish the oil control valves at different positions, they are named as follows: the oil control valve provided on the oil inlet pipeline 1 connected between the first gas input pipeline 4 and the thermal oil furnace 3 is the first oil control valve 15, and the oil control valve provided on the oil outlet pipeline 2 connected between the second gas input pipeline 5 and the thermal oil furnace 3 is the second oil control valve 16;

[0043] The heat transfer oil discharge pipeline 8 is respectively connected to the exhaust port of the hydrogen storage device 200, the first oil and gas exhaust pipeline 6 and the second oil and gas exhaust pipeline 7, and the first oil discharge valve 17 is provided on the heat transfer oil discharge pipeline 8 located on the first oil and gas exhaust pipeline 6 and the second oil and gas exhaust pipeline 7 near the hydrogen storage device 200; the heat transfer oil collection device 10 is connected to the heat transfer oil discharge pipeline 8 through the heat transfer oil delivery pipeline 9, and the heat transfer oil delivery pipeline 9 is provided with a heat transfer oil exhaust main valve 18; along the vertical direction, the heat transfer oil collection device 10 is relatively The other structures of the thermal oil discharge system 100 of the solid hydrogen storage device and the hydrogen storage device 200 are located at the lowest point, that is, the thermal oil collecting device 10 is arranged below the hydrogen storage device 200, the oil inlet pipeline 1, the oil outlet pipeline 2, the thermal oil furnace 3, the first gas input pipeline 4, the second gas input pipeline 5, the first oil and gas discharge pipeline 6, the second oil and gas discharge pipeline 7, the thermal oil discharge pipeline 8, the thermal oil collecting device 10, the first auxiliary oil discharge pipeline 23 described below, the second auxiliary oil discharge pipeline 24 and the aggregation pipeline 25 and other components.

[0044] According to the structure described above, the detailed working process of the thermal oil discharge system 100 of the solid hydrogen storage device provided by the present application is as follows:

[0045] Working condition 1: When the heat transfer oil in the entire hydrogen charging and discharging system has cooled to below its boiling point or room temperature, when the ambient temperature is low, the hydrogen charging and discharging system may not be used for a long time. In order to ensure that the heat transfer oil in the system does not solidify and cause the next startup to remain unchanged, it is necessary to discharge all the heat transfer oil in the system. At this time, it is only necessary to open the first oil discharge valve 17, the second gas control valve 12, the third gas control valve 13 and the heat transfer oil drain main valve 18 at the lowest point of the heat transfer oil pipeline in the system, and keep the inlet valve 20 and the outlet valve 21 in the open state.

[0046] Working condition 2: when the hydrogen storage device 200 is finished with hydrogen charging or hydrogen discharge, and needs to be drained and cooled in time to speed up the transportation, turnover and loading and unloading of the hydrogen storage device 200, the heating system of the thermal oil furnace 3 is turned off, the first oil control valve 15 and the second oil control valve 16 are turned off, the second oil drain valve 26 is turned off, the first oil drain valve 17, the second gas control valve 12 and the third gas control valve 13 at the low point of the thermal oil are opened, and the inlet valve 20 and the outlet valve 21 are kept open, then the first gas control valve 11 is opened, and then the thermal oil drain main valve 18 is opened, and after a period of time, the first gas control valve 11 is closed;

[0047] Then, the fourth gas control valve 14 is opened to reversely pressurize and purge the thermal oil pipeline inside the hydrogen storage device 200, and the fourth gas control valve 14 is closed after a period of time, and the oil drainage is completed.

[0048] In combination with the above, it can be seen that the thermal oil discharge system 100 of the solid-state hydrogen storage device provided in the present application is particularly suitable for quickly draining the thermal oil on a large-capacity, high-temperature solid-state hydrogen storage device. The thermal oil collecting device 10 is located at the lowest point of the entire system, and valves are set at the low points of all pipelines in the system. Then, the thermal oil in the hydrogen storage device 200 and the pipeline is collected and discharged into the thermal oil collecting device 10. When draining the oil at room temperature, the thermal oil in the equipment can be directly discharged into the thermal oil collecting device 10 at the lowest point by gravity; when draining the oil at high temperature, nitrogen is used to pressurize the thermal oil in the hydrogen storage device 200 and discharge it into the thermal oil collecting device 10 at the lowest point.

[0049] It can be seen that the thermal oil discharge system 100 of the solid-state hydrogen storage device does not use a pump, and can quickly drain the thermal oil in the system, avoiding the increase in operation and maintenance costs caused by the solidification of the thermal oil in the system at low temperatures. Moreover, since no pump is used, the problem of pump evacuation is avoided, thereby reducing the cost of equipment and maintenance.

[0050] In this embodiment, preferably, Figure 1 As shown, the thermal oil discharge system 100 of the solid hydrogen storage device further includes a cooling device 19 , which is disposed on the side of the thermal oil delivery pipeline 9 and extends along the extension direction of the thermal oil delivery pipeline 9 .

[0051] According to the structure described above, the cooling device 19 can be used to quickly cool the high-temperature thermal oil entering the thermal oil collection device 10, and then the high-temperature thermal oil can be cooled to below its boiling point at normal pressure, thereby effectively preventing the residual vaporized thermal oil from entering the atmosphere when the nitrogen is depressurized, thereby endangering the life and health of the operator.

[0052] Furthermore, preferably, the cooling device 19 can be a shell and tube heat exchanger. In particular, when the heat transfer oil collection device 10 is buried underground, the shell and tube heat exchanger is also located underground. Therefore, the cooling device 19 can use an underground shell and tube heat exchanger. Of course, it is not limited to this. Other types of heat exchangers or other types of cooling equipment can also be used, and can also be designed according to actual needs.

[0053] In this embodiment, preferably, Figure 1 As shown, along the extension direction of the heat transfer oil delivery pipeline 9, a liquid inlet pipe 191 and a liquid outlet pipe 192 are respectively provided at both ends of the cooling device 19, and valves 193 are provided on the liquid inlet pipe 191 and the liquid outlet pipe 192, wherein the valve 193 on the liquid inlet pipe 191 can be named as a liquid inlet valve, and the valve 193 on the liquid outlet pipe 192 can be named as a liquid outlet valve.

[0054] According to the structure described above, the cooling liquid can enter from the liquid inlet pipe 191 at one end, flow along the extension direction of the heat transfer oil delivery pipeline 9 to the entire cooling device 19, and finally flow out from the liquid outlet pipe 192 at the other end, thereby increasing the length of the cooling area and greatly improving the cooling effect.

[0055] In this embodiment, preferably, Figure 1 As shown, the thermal oil collecting device 10 is arranged below the ground.

[0056] According to the structure described above, the heat transfer oil collecting device 10 is set below the ground, which can ensure that the heat transfer oil collecting device 10 is always located at the lowest point. Gravity can be used to drain the room temperature heat transfer oil at a low point, which saves energy, saves space on the ground, and effectively avoids interference with equipment on the ground.

[0057] Furthermore, preferably, the thermal oil collection device 10 is provided with an exhaust pipe 101 connected to its inner cavity, and the exhaust pipe 101 extends above the ground. The exhaust pipe 101 can be used to discharge nitrogen in the thermal oil collection device 10 to improve safety and reliability.

[0058] Furthermore, preferably, an exhaust valve 102 is provided on the exhaust pipeline 101 to make the exhaust more controllable.

[0059] It should be noted that: the heat transfer oil collection device 10 is not limited to being arranged below the ground as mentioned above, the heat transfer oil collection device 10 can also be arranged above the ground, and the heat transfer oil collection device 10 is provided with an exhaust pipe 101 connected to its inner cavity and the outside, and the specific selection is based on actual needs.

[0060] In this embodiment, preferably, Figure 1As shown, the heat transfer oil discharge system 100 of the solid hydrogen storage device also includes a first auxiliary oil discharge pipeline 23, a second auxiliary oil discharge pipeline 24 and a collection pipeline 25; wherein, the two ends of the first auxiliary oil discharge pipeline 23 are respectively connected to the oil inlet pipeline 1 connected between one of the oil control valves, that is, the first oil control valve 15 and the heat transfer oil furnace 3, and the collection pipeline 25;

[0061] The two ends of the second auxiliary oil drain pipeline 24 are respectively connected to the oil outlet pipeline 2 connected between the other oil control valve, i.e., the second oil control valve 16 and the thermal oil furnace 3, and the collecting pipeline 25; the collecting pipeline 25 is connected to the thermal oil discharge pipeline 8 located on the side of the first oil and gas discharge pipeline 6 and the second oil and gas discharge pipeline 7 away from the hydrogen storage device 200, and the collecting pipeline 25 is provided with a second oil drain valve 26.

[0062] According to the structure described above, the first auxiliary oil drain pipeline 23 and the second auxiliary oil drain pipeline 24 can be used to drain the residual heat transfer oil in the oil inlet pipeline 1 and the oil outlet pipeline 2 on the right side of the oil control valve, and finally transported to the heat transfer oil collection device 10 under the ground through the collecting pipeline 25.

[0063] In this embodiment, preferably, Figure 1 As shown, the outlet end of the heat transfer oil collecting device 10 is connected to the heat transfer oil furnace 3 , and preferably, the outlet end of the heat transfer oil collecting device 10 is connected to the heat transfer oil furnace 3 through a recovery pipeline 27 .

[0064] According to the structure described above, after a current hydrogen storage device 200 uses the present system to discharge the thermal oil, after the present system is connected to a new hydrogen storage device 200, the thermal oil in the thermal oil collection device 10 can be re-pumped into the thermal oil furnace 3 through the oil injection pump inside the thermal oil furnace 3 for reuse, thereby reducing costs and being quick and convenient.

[0065] In this embodiment, preferably, Figure 1 As shown, the thermal oil collecting device 10 is provided with a pressure detection component 82 .

[0066] According to the structure described above, it can be known that the pressure detection component 82 is used to monitor the pressure in the thermal oil collection device 10 at all times to ensure safety and reliability.

[0067] Further, preferably, the pressure detection component 82 is a pressure sensor, but is not limited thereto, and may also be a pressure gauge, etc., which is selected according to actual needs.

[0068] In this embodiment, preferably, Figure 1 As shown, the thermal oil collecting device 10 is provided with a first temperature detecting component 104 .

[0069] According to the structure described above, the first temperature detection component 104 can be used to monitor the temperature of the heat transfer oil inside the heat transfer oil collection device 10 at all times.

[0070] Further, preferably, especially when the thermal oil collection device 10 is set underground, the first temperature detection component 104 can be a first temperature transmitter, which is a device for measuring temperature and converting it into a standard signal output. It is equipped with a temperature sensor for use in monitoring and controlling temperature, and the temperature transmitter can convert the temperature signal into a standard current or voltage output for remote transmission and processing. At the same time, the temperature transmitter also has the advantages of strong anti-interference ability, high precision, high reliability, etc., and is suitable for most temperature measurement and control occasions in industrial environments. It should be noted that: when the thermal oil collection device 10 is set on the ground, the first temperature detection component 104 can be a temperature transmitter or a temperature meter, etc.

[0071] In this embodiment, preferably, Figure 1 As shown, the thermal oil collecting device 10 is provided with a liquid level detection component 105 .

[0072] According to the structure described above, it can be known that the liquid level detection component 105 is used to accurately measure the volume, liquid height and weight of the thermal oil.

[0073] Further, preferably, especially when the heat transfer oil collection device 10 is set underground, the liquid level detection component 105 can be a liquid level transmitter, which can realize automatic detection and information output, etc. It should be noted that: when the heat transfer oil collection device 10 is set on the ground, the liquid level detection component 105 can be a liquid level transmitter or a liquid level meter, etc.

[0074] In this embodiment, preferably, Figure 1 As shown, the heat transfer oil discharge system 100 of the solid hydrogen storage device also includes a main input pipeline 28, and the main input pipeline 28 is respectively connected to the inlet end of the first gas input pipeline 4 and the inlet end of the second gas input pipeline 5.

[0075] According to the structure described above, it is known that only one gas source is required to be provided, and nitrogen can be introduced into the first gas input pipeline 4 and the second gas input pipeline 5 through the main input pipeline 28, thereby saving gas source. Of course, this is not limited to this, and the main input pipeline 28 may not be provided, and the first gas input pipeline 4 and the second gas input pipeline 5 may be provided with separate gas sources, or connected to the same gas source through a valve.

[0076] In this embodiment, preferably, Figure 1 As shown, the oil inlet pipeline 1 is detachably connected to the inlet end of the heat transfer oil chamber of the hydrogen storage device 200;

[0077] The oil outlet pipeline 2 is detachably connected to the outlet end of the heat transfer oil chamber of the hydrogen storage device 200;

[0078] The heat transfer oil discharge pipeline 8 is detachably connected to the exhaust port of the hydrogen storage device 200 .

[0079] According to the structure described above, when the hydrogen storage device 200 is filled with hydrogen or discharged with hydrogen, the hydrogen storage device 200 can be disconnected from the oil inlet pipeline 1, the oil outlet pipeline 2 and the thermal oil discharge pipeline 8, and then the hydrogen storage device 200 can be removed from the system for easy transportation to a designated location for use.

[0080] Further, preferably, Figure 1 As shown, a part of the oil inlet pipeline 1 that is connected to the inlet valve 20 and the first oil and gas discharge pipeline 6 is a hose, namely the first hose 1001, that is, the pipes on both sides of the first hose 1001 are rigid pipes, the first hose 1001 belongs to a soft connection structure, and the second hose 201 can be detachably connected to the rigid pipes on both sides through flanges and bolts, so as to be used as a disassembly point. Of course, it is not limited to the above, and other positions of the air pressure can also be selected as the disassembly point, which is selected according to actual needs.

[0081] Further, preferably, Figure 1 As shown, a portion of the oil outlet pipeline 2 connected to the outlet valve 21 and the second oil and gas outlet pipeline 7 is a hose, namely the second hose 201. That is to say, the pipes on both sides of the second hose 201 are rigid pipes. The second hose 201 belongs to a soft connection structure, and the second hose 201 can be detachably connected to the rigid pipes on both sides through flanges and bolts, so that it can be used as a disassembly point, as described below.

[0082] Further, preferably, Figure 1 As shown, part of the heat transfer oil discharge pipeline 8 close to the hydrogen storage device 200 is a hose, namely the third hose 81. That is to say, the pipes on both sides of the third hose 81 are rigid pipes. The third hose 81 is a soft connection structure, which plays a role of buffering, etc. Moreover, the third hose 81 can be detachably connected to the rigid pipes on both sides by flanges and bolts, so that it can be used as a disassembly point.

[0083] In this embodiment, preferably, Figure 1 As shown, an inlet valve 20 is provided on the oil inlet pipeline 1 which is connected to the inlet end of the hydrogen storage device 200 through the first oil and gas exhaust pipeline 6 .

[0084] According to the structure described above, the inlet valve 20 mainly controls the connection or disconnection between the hydrogen storage device 200 and the oil inlet pipeline 1. Of course, the inlet valve 20 may not be provided, but a valve may be provided at the inlet end of the hydrogen storage device 200 for control.

[0085] In this embodiment, preferably, Figure 1 As shown, an outlet valve 21 is provided on the oil outlet pipeline 2 which is connected to the outlet end of the hydrogen storage device 200 through the second oil and gas outlet pipeline 7 .

[0086] According to the structure described above, the outlet valve 21 mainly controls the connection or disconnection between the hydrogen storage device 200 and the oil outlet pipeline 2. Of course, the outlet valve 21 may not be provided, but a valve may be provided at the outlet end of the hydrogen storage device 200 for control.

[0087] In this embodiment, preferably, Figure 1 As shown, both the first gas input pipeline 4 and the second gas input pipeline 5 are provided with a one-way valve 22 to ensure one-way transmission of the heat transfer oil and avoid backflow.

[0088] In summary, the detailed working process of the thermal oil discharge system 100 of the solid hydrogen storage device provided by the present application is as follows:

[0089] Working condition 1: When the heat transfer oil in the entire hydrogen charging and discharging system has been cooled to below its boiling point or room temperature, when the ambient temperature is low, the hydrogen charging and discharging system may not be used for a long time. In order to ensure that the heat transfer oil in the system does not solidify and cause the next startup to remain unchanged, it is necessary to discharge all the heat transfer oil in the system. At this time, only the first oil discharge valve 17, the second oil discharge valve 26, the second gas control valve 12, the third gas control valve 13, the heat transfer oil drain main valve 18 and the exhaust valve 102 at the lowest point of the heat transfer oil pipeline in the system need to be opened, and the inlet and outlet valves 21 and the outlet valve 21 are kept open.

[0090] Working condition 2: When the hydrogen storage device 200 needs to drain oil and cool down in time after hydrogen filling or hydrogen discharge to speed up the transportation, turnover and loading and unloading of the hydrogen storage device 200, close the heating system of the thermal oil furnace 3, close the first oil control valve 15 and the second oil control valve 16, close the second oil drain valve 26, open the first oil drain valve 17 at the low point of the thermal oil, the first oil drain valve 17, the second gas control valve 12 and the third gas control valve 13, open the liquid inlet valve and liquid outlet valve of the cooling water pipeline, and keep the inlet and outlet valves 21 and the outlet valve 21 open. After that, open the first gas control valve 11, and then open the thermal oil drain main valve 18. After a period of time, close the first gas control valve 11;

[0091] Then, the fourth gas control valve 14 is opened to reversely pressurize and purge the heat transfer oil pipeline inside the hydrogen storage device 200, and after a period of time, the fourth gas control valve 14 is closed;

[0092] After the oil is drained, when the temperature in the thermal oil collection device 10 drops below the normal boiling point of the thermal oil, open the exhaust valve 102 to release the pressurized nitrogen inside to normal pressure. After the hose temperature drops rapidly to an operable temperature, disconnect the thermal oil hose and the hydrogen storage device 200 can be loaded, unloaded and transported.

[0093] When the new solid-state hydrogen storage device 200 is connected, the thermal oil in the underground thermal oil collection device 10 can be re-injected into the system through the oil injection pump inside the thermal oil furnace 3, which is quick and convenient.

[0094] It can be seen that the heat transfer oil discharge system 100 of the solid-state hydrogen storage device provided by the present application is particularly suitable for quickly draining the heat transfer oil on the large-capacity high-temperature solid-state hydrogen storage device 200. The heat transfer oil collecting device 10 is located at the lowest point of the entire system, and valves are set at the low points of all pipelines in the system. Then the heat transfer oil in the hydrogen storage device 200 and the pipeline is collected and discharged into the heat transfer oil collecting device 10. When the oil is discharged at room temperature, the heat transfer oil in the equipment can be directly discharged into the heat transfer oil collecting device 10 at the lowest point by gravity; when the oil is discharged at high temperature, nitrogen is used to pressurize the heat transfer oil in the hydrogen storage device 200 and discharge it into the heat transfer oil collecting device 10 at the lowest point. Before the heat transfer oil enters the underground heat transfer oil collecting device 10, a cooling device 19 is set, and circulating cooling water is passed to cool the high-temperature heat transfer oil and then discharge it into the underground heat transfer oil collecting device 10. Finally, the exhaust valve 102 is opened to release the nitrogen in the system to ensure the safety and reliability of the system.

[0095] Moreover, the thermal oil discharge system 100 of the solid-state hydrogen storage device does not use a pump, and can quickly and timely discharge the thermal oil in the system, avoiding the increase in operation and maintenance costs caused by the solidification of the thermal oil in the system at low temperatures. Moreover, since no pump is used, the problem of pump evacuation is avoided, thereby reducing the cost of equipment and maintenance. At the same time, a cooling structure is adopted to shorten the entire cooling time to the operating temperature, effectively saving equipment maintenance and operation costs, and effectively shortening the turnover time of the large-capacity solid-state hydrogen storage device 200.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A heat transfer oil discharge system for a solid hydrogen storage device, applied to a hydrogen storage device, characterized in that: The heat transfer oil discharge system of the solid hydrogen storage device comprises: an oil inlet pipeline, an oil outlet pipeline, a heat transfer oil furnace, a first gas input pipeline, a second gas input pipeline, a first oil and gas discharge pipeline, a second oil and gas discharge pipeline, a heat transfer oil discharge pipeline, a heat transfer oil delivery pipeline and a heat transfer oil collection device; Wherein, the outlet end of the thermal oil furnace is connected to the inlet end of the thermal oil chamber of the hydrogen storage device via the oil inlet pipeline; the inlet end of the thermal oil furnace is connected to the outlet end of the thermal oil chamber of the hydrogen storage device via the oil outlet pipeline; the first gas input pipeline is connected to the oil inlet pipeline, and the second gas input pipeline is connected to the oil outlet pipeline; the oil inlet pipeline connected between the hydrogen storage device and the first gas input pipeline is connected to the first oil and gas exhaust pipeline; the oil outlet pipeline connected between the hydrogen storage device and the second gas input pipeline is connected to the second oil and gas exhaust pipeline; The first gas input pipeline, the second gas input pipeline, the first oil and gas exhaust pipeline and the second oil and gas exhaust pipeline are all provided with gas control valves; the oil inlet pipeline connected between the first gas input pipeline and the thermal oil furnace and the oil outlet pipeline connected between the second gas input pipeline and the thermal oil furnace are all provided with oil control valves; the thermal oil exhaust pipeline is respectively connected with the exhaust port of the hydrogen storage device, the first oil and gas exhaust pipeline and the second oil and gas exhaust pipeline, and the first oil exhaust valve is provided on the pipeline of the thermal oil exhaust pipeline located on the first oil and gas exhaust pipeline and the second oil and gas exhaust pipeline close to the hydrogen storage device; the thermal oil collecting device is connected with the thermal oil exhaust pipeline through the thermal oil delivery pipeline, and the thermal oil delivery pipeline is provided with a thermal oil exhaust main valve; along the vertical direction, the thermal oil collecting device is located at the lowest point relative to other structures of the thermal oil exhaust system of the solid hydrogen storage device and the hydrogen storage device.

2. The heat transfer oil discharge system of the solid-state hydrogen storage device according to claim 1, characterized in that: The heat transfer oil discharge system of the solid-state hydrogen storage device further includes a cooling device, which is disposed on the side of the heat transfer oil delivery pipeline and extends along the extension direction of the heat transfer oil delivery pipeline.

3. The heat transfer oil discharge system of the solid hydrogen storage device according to claim 2, characterized in that: Along the extension direction of the heat transfer oil delivery pipeline, a water inlet pipe and a water outlet pipe are respectively arranged at both ends of the cooling device, and valves are arranged on the water inlet pipe and the water outlet pipe.

4. The heat transfer oil discharge system of the solid-state hydrogen storage device according to claim 1, characterized in that: The heat transfer oil collecting device is arranged above the ground, and the heat transfer oil collecting device is provided with an exhaust pipeline connected with its inner cavity and the outside.

5. The heat transfer oil discharge system of the solid hydrogen storage device according to claim 1, characterized in that: The heat transfer oil collecting device is arranged below the ground, and the heat transfer oil collecting device is provided with an exhaust pipeline which is in communication with its inner cavity, and the exhaust pipeline extends above the ground.

6. The heat transfer oil discharge system of the solid hydrogen storage device according to claim 4 or 5, characterized in that: An exhaust valve is arranged on the exhaust pipeline.

7. The thermal oil discharge system of the solid-state hydrogen storage device according to claim 1, characterized in that: The heat transfer oil discharge system of the solid hydrogen storage device further includes a first auxiliary oil discharge pipeline, a second auxiliary oil discharge pipeline and a collection pipeline; wherein both ends of the first auxiliary oil discharge pipeline are respectively connected to the oil inlet pipeline connected between one of the oil control valves and the heat transfer oil furnace and the collection pipeline; The two ends of the second auxiliary oil drain pipeline are respectively connected to the oil outlet pipeline connected between the other oil control valve and the thermal oil furnace and the collecting pipeline; the collecting pipeline is connected to the thermal oil discharge pipeline located on the side of the first oil and gas discharge pipeline and the second oil and gas discharge pipeline away from the hydrogen storage device, and the collecting pipeline is provided with a second oil drain valve.

8. The heat transfer oil discharge system of the solid hydrogen storage device according to claim 1, characterized in that: The outlet end of the heat transfer oil collecting device is connected to the heat transfer oil furnace; and / or The heat transfer oil collecting device is provided with a pressure detection component; and / or The thermal oil collecting device is provided with a first temperature detection member; and / or The heat transfer oil collecting device is provided with a liquid level detection component.

9. The thermal oil discharge system of the solid-state hydrogen storage device according to claim 1, characterized in that: The heat transfer oil discharge system of the solid-state hydrogen storage device also includes a main input pipeline, and the main input pipeline is respectively connected to the inlet end of the first gas input pipeline and the inlet end of the second gas input pipeline.

10. The heat transfer oil discharge system of the solid hydrogen storage device according to claim 1, characterized in that: The oil inlet pipeline is detachably connected to the inlet end of the heat transfer oil chamber of the hydrogen storage device; and / or The oil outlet pipeline is detachably connected to the outlet end of the heat transfer oil chamber of the hydrogen storage device; and / or The heat transfer oil discharge pipeline is detachably connected to the exhaust port of the hydrogen storage device; and / or An inlet valve is provided on the oil inlet pipeline connected to the inlet end of the hydrogen storage device through the first oil and gas discharge pipeline; and / or An outlet valve is provided on the oil outlet pipeline connected to the outlet end of the hydrogen storage device through the second oil and gas outlet pipeline; and / or The first gas input pipeline and the second gas input pipeline are both provided with a one-way valve.

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