Large efficient solid hydrogen storage and desorption system

Abstract

The utility model relates to the field of solid hydrogen storage, and discloses a large-scale efficient solid hydrogen storage and desorption system which comprises a solid hydrogen storage module, a conduction oil fused salt heat exchanger, a fused salt tank and a fused salt electric heater, the solid hydrogen storage module is connected with the heat conduction oil molten salt heat exchanger through a heat conduction oil circulating pump; the conduction oil fused salt heat exchanger is connected with the fused salt tank through a fused salt pipeline; and the fused salt tank is connected with the fused salt electric heater. The hydrogen and heat storage device has the advantages that due to the existence of the fused salt heat exchanger and the fused salt electric heater, hydrogen and heat can be stored when the wind power load is high, and when the wind power load is low, the fused salt heat exchanger is used for heat exchange between fused salt and heat conduction oil in the hydrogen desorption process, and therefore hydrogen desorption and heat desorption can be achieved; in addition, fluctuating wind and light power generation can stably provide a heat source for the system, so that the system can stably convey hydrogen outwards, and the purpose of efficiently utilizing wind and light energy is achieved.

Description

Technical Field

[0001] The utility model relates to the field of solid-state hydrogen storage, in particular to a large-scale high-efficiency solid-state hydrogen storage and dehydrogenation system. Background Art

[0002] As a clean energy, hydrogen energy is sought after and paid attention to by various countries. The number of hydrogen energy projects has increased and their scale has expanded. Solid-state hydrogen storage is a hydrogen storage technology with high hydrogen storage density. The dehydrogenation process needs to absorb heat. Therefore, large-scale solid-state hydrogen storage needs to be equipped with large-scale heat transfer medium transportation and heating devices. At present, the heat transfer medium of solid-state hydrogen storage devices is mainly thermal oil, and the heating device is mainly a stable electric heating or natural gas heating method. However, it is unstable for large-scale wind and solar power generation, and cannot stably supply heat to the outside, which is not conducive to the dehydrogenation of solid-state hydrogen storage devices. Utility Model Content

[0003] The purpose of the present invention is to provide a large-scale and efficient solid-state hydrogen storage and dehydrogenation system to solve the technical problem that the prior art cannot effectively utilize wind and solar energy for hydrogen charging and dehydrogenation, resulting in energy waste.

[0004] A large-scale high-efficiency solid-state hydrogen storage and dehydrogenation system, comprising: a solid-state hydrogen storage module, a heat transfer oil molten salt heat exchanger, a molten salt tank and a molten salt electric heater;

[0005] The solid hydrogen storage module and the thermal oil molten salt heat exchanger are connected via a thermal oil circulation pump;

[0006] The heat transfer oil molten salt heat exchanger is connected to the molten salt tank through a molten salt pipeline;

[0007] The molten salt tank is connected to the molten salt electric heater.

[0008] Furthermore, the solid-state hydrogen storage module is also connected to the wind and solar photovoltaic hydrogen production device through a hydrogen pipeline.

[0009] Furthermore, the molten salt electric heater is also electrically connected to the wind and solar power generation device.

[0010] Furthermore, the molten salt tank includes a high-temperature molten salt tank and a low-temperature molten salt tank; the high temperature refers to a temperature greater than a first preset value; the low temperature refers to a temperature lower than a second preset value.

[0011] Furthermore, the molten salt tank is connected to a molten salt electric heater, specifically:

[0012] The high-temperature molten salt tank is connected to the molten salt electric heater via a high-temperature molten salt pump and a molten salt pipeline;

[0013] The low-temperature molten salt tank is connected to the molten salt electric heater via a low-temperature molten salt pump and a molten salt pipeline.

[0014] The beneficial effects provided by the utility model are as follows: due to the presence of the molten salt heat exchanger and the molten salt electric heater, hydrogen and heat can be stored when the wind power load is high; when the wind power load is low, the molten salt heat exchanger is used for heat exchange between molten salt and heat transfer oil during hydrogen release, thereby releasing hydrogen and heat; in addition, the fluctuating wind and solar power generation can be stably provided with a heat source to the system, so that the system can stably transport hydrogen to the outside, thereby achieving the purpose of efficiently utilizing wind and solar energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the system structure diagram of the utility model;

[0016] In the figure:

[0017] 1-solid-state hydrogen storage module, 2-thermal oil circulation pump, 3-thermal oil molten salt heat exchanger, 4-high-temperature molten salt tank, 5-high-temperature molten salt pump, 6-low-temperature molten salt tank, 7-low-temperature molten salt pump, 8-molten salt electric heater. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model clearer, the implementation mode of the utility model will be further described below in conjunction with the accompanying drawings.

[0019] Please refer to Figure 1 , Figure 1 It is a system structure diagram of the utility model.

[0020] The utility model provides a large-scale high-efficiency solid-state hydrogen storage and dehydrogenation system, comprising:

[0021] Solid-state hydrogen storage module 1, thermal oil molten salt heat exchanger 3, molten salt tank and molten salt electric heater 8;

[0022] The solid hydrogen storage module 1 is connected to the thermal oil molten salt heat exchanger 3 via a thermal oil circulation pump 2;

[0023] The heat transfer oil molten salt heat exchanger 3 is connected to the molten salt tank through a molten salt pipeline;

[0024] The molten salt tank is connected to the molten salt electric heater 8 .

[0025] It should be noted that the solid-state hydrogen storage module 1 is also connected to the wind power and photovoltaic hydrogen production device through a hydrogen pipeline.

[0026] It should be noted that the molten salt electric heater 8 is also electrically connected to the wind-solar power generation device.

[0027] It should be noted that the molten salt tank includes a high-temperature molten salt tank 4 and a low-temperature molten salt tank 6; the high temperature refers to a temperature greater than a first preset value; the low temperature refers to a temperature lower than a second preset value.

[0028] It should be noted that the molten salt tank is connected to the molten salt electric heater 8, specifically:

[0029] The high temperature molten salt tank 4 is connected to the molten salt electric heater 8 through a high temperature molten salt pump 5 and a molten salt pipeline;

[0030] The low-temperature molten salt tank 6 is connected to the molten salt electric heater 8 through a low-temperature molten salt pump 7 and a molten salt pipeline.

[0031] The principle of the utility model is as follows:

[0032] The situation where low-temperature molten salt turns into high-temperature molten salt:

[0033] First, when the power generation capacity of the wind and solar power generation device is high, the low-temperature molten salt stored in the low-temperature molten salt tank 6 is transported to the molten salt electric heater by the low-temperature molten salt pump 7 for electrical heating;

[0034] After being electrically heated, the temperature of the molten salt rises, and the low-temperature molten salt becomes high-temperature molten salt, which is transported to the high-temperature molten salt tank 4 for storage.

[0035] The situation where high temperature molten salt becomes low temperature molten salt:

[0036] First, when the power of the wind and solar power generation device is low, the high-temperature molten salt is transported to the thermal oil molten salt heat exchanger for heat exchange through the high-temperature molten salt pump 5 to heat the thermal oil. After the heat exchange, the molten salt temperature becomes lower, and the high-temperature molten salt becomes low-temperature molten salt. The low-temperature molten salt is transported to the low-temperature molten salt tank 6 for storage.

[0037] On the other hand, the solid hydrogen storage container 1 needs to absorb heat during the dehydrogenation process, and the heat is provided by the thermal oil; the heat of the thermal oil comes from the thermal oil molten salt heat exchanger 3; the thermal oil molten salt heat exchanger 3 converts the heat from the high-temperature molten salt tank 4 into the heat of the thermal oil; and transmits the thermal oil storing the heat to the thermal oil pipeline of the solid hydrogen storage module 1; at this time, the solid hydrogen storage container 1 absorbs heat to perform the dehydrogenation process. The released hydrogen can be provided to the hydrogen application end for use.

[0038] When the solid-state hydrogen storage module 1 needs to release hydrogen, the stored heat can be utilized, and the fluctuating energy of the wind and solar power generation device can also be stabilized, providing a stable heat source to the system, so that the solid-state hydrogen storage module 1 can stably transport hydrogen to the outside.

[0039] It should be noted that the hydrogen storage capacity of a single solid-state hydrogen storage module 1 is 1 to 1.5 t, and the amount of solid-state hydrogen storage is selected according to the hydrogen storage weight and hydrogen release speed. The present invention is not limited thereto.

[0040] It should be noted that before and after the heat transfer oil exchanges heat in the solid hydrogen storage module, the temperature difference before and after the heat transfer oil molten salt heat exchanger is controlled at 12-20°C.

[0041] It should be noted that the material of the heat transfer oil molten salt heat exchanger is Q345R, 15CrMo or higher, and the heat exchange area is determined by the properties of the heat transfer oil, the flow rate of the heat transfer oil, the properties of the molten salt and the flow rate of the molten salt. This utility model is only used for explanation and description, and is not limited to a specific one.

[0042] It should be noted that the temperature of high-temperature molten salt is controlled at around 560°C, and the temperature of low-temperature molten salt is controlled at around 340°C. The weight of molten salt stored in high and low temperature molten salt is determined by the heat required for the entire hydrogen desorption process.

[0043] It should be noted that the flow rate of the high and low temperature molten salt pumps is determined by the heat transfer oil flow rate and the temperature difference before and after the heat transfer oil molten salt heat exchanger.

[0044] It should be noted that the heating power of the electric heater is determined by the heat and heating time of the entire hydrogen release process.

[0045] The above is only for explanation and description, and the focus of the present invention is still on the connection structure and relationship of the system.

[0046] The beneficial effects of the utility model are as follows: due to the presence of the molten salt heat exchanger and the molten salt electric heater, hydrogen and heat can be stored when the wind power load is high; when the wind power load is low, the molten salt heat exchanger is used for heat exchange between molten salt and heat transfer oil during hydrogen release, thereby releasing hydrogen and heat; in addition, the fluctuating wind and solar power generation can be stably provided with a heat source to the system, so that the system can stably transport hydrogen to the outside, thereby achieving the purpose of efficiently utilizing wind and solar energy.

[0047] 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 shall be included in the protection scope of the present invention.

Claims

1. A large-scale, efficient solid-state hydrogen storage and dehydrogenation system, characterized by: include: Solid-state hydrogen storage module, thermal oil molten salt heat exchanger, molten salt tank and molten salt electric heater; The solid hydrogen storage module and the thermal oil molten salt heat exchanger are connected via a thermal oil circulation pump; The heat transfer oil molten salt heat exchanger is connected to the molten salt tank through a molten salt pipeline; The molten salt tank is connected to the molten salt electric heater.

2. A large-scale, efficient solid-state hydrogen storage and dehydrogenation system as claimed in claim 1, characterized in that: The solid-state hydrogen storage module is also connected to the wind power and photovoltaic hydrogen production device through a hydrogen pipeline.

3. A large-scale, efficient solid-state hydrogen storage and dehydrogenation system as claimed in claim 1, characterized in that: The molten salt electric heater is also electrically connected to the wind and solar power generation device.

4. A large-scale, efficient solid-state hydrogen storage and dehydrogenation system as claimed in claim 1, characterized in that: The molten salt tank includes a high-temperature molten salt tank and a low-temperature molten salt tank; the high temperature refers to a temperature greater than a first preset value; the low temperature refers to a temperature lower than a second preset value.

5. A large-scale, efficient solid-state hydrogen storage and dehydrogenation system as claimed in claim 4, characterized in that: The molten salt tank is connected to the molten salt electric heater, specifically: The high-temperature molten salt tank is connected to the molten salt electric heater via a high-temperature molten salt pump and a molten salt pipeline; The low-temperature molten salt tank is connected to the molten salt electric heater via a low-temperature molten salt pump and a molten salt pipeline.

Images