Hydrogen metallurgy production system

Abstract

The utility model provides a hydrogen metallurgy production system which comprises a green hydrogen preparation unit, a green power generation unit, a metallurgy reaction unit and a furnace top recovery unit, through cooperative work of the multiple units, gradient utilization and cyclic utilization of energy are achieved, and the energy utilization efficiency is improved; green electricity and hydrogen are used as energy and a reducing agent in the whole production process, emission of pollutants such as carbon dioxide is reduced, and greenization of the metallurgical process is achieved; and all the units are tightly connected to form a complete hydrogen metallurgy production system, so that the production efficiency and the stability are improved.

Description

Technical Field

[0001] This application relates to the field of hydrogen metallurgical production technology, and in particular to a hydrogen metallurgical production system. Background Technology

[0002] In traditional metallurgical production, fossil fuels such as coal are often used as reducing agents and energy sources. This not only consumes large amounts of non-renewable resources but also generates significant amounts of greenhouse gases such as carbon dioxide, causing severe environmental pollution. Reducing carbon emissions and energy consumption has become a crucial task for steel companies. In terms of carbon reduction, steel companies have attempted various methods, including district heating or cooling, gas recycling, combined cooling, heating, and power (CCHP), and carbon capture, utilization, and storage (CCUS). However, the fundamental nature of using carbon-based energy as the reducing agent remains unchanged; only the flow of CO2 byproducts has been altered. To address CO2 generation at its source, the carbon-based nature of the reducing agent must be changed. Therefore, finding a green and low-carbon metallurgical production method has become an inevitable trend in the industry.

[0003] Hydrogen metallurgy, as a novel metallurgical process, uses hydrogen as a reducing agent. Hydrogen possesses high calorific value, strong reducing properties, and zero carbon emissions, making it considered one of the cleanest energy sources. Therefore, hydrogen metallurgy produces almost no carbon dioxide emissions during production, offering significant environmental advantages. However, existing hydrogen metallurgical production systems still face numerous challenges in energy efficiency and system integration optimization, requiring urgent improvement. Utility Model Content

[0004] This application provides a hydrogen metallurgical production system that can improve energy utilization efficiency.

[0005] This application provides a hydrogen metallurgical production system, including: a green hydrogen production unit, comprising an electrolytic hydrogen production device, a first compression device, a first low-temperature heat storage device, and a high-pressure hydrogen storage device connected to each other; the electrolytic hydrogen production device converts green electricity into hydrogen gas, which is then output through the high-pressure hydrogen storage device after passing through the first low-temperature heat storage device; and a green power generation unit connected downstream of the green hydrogen production unit, comprising a first power generation group and / or a second power generation group, wherein the first power generation group is equipped with a first energy conversion device, and the second power generation group is equipped with a second energy conversion device; the hydrogen gas output through the high-pressure hydrogen storage device is used as the first power generation by the first power generation group. The kinetic energy source of the group enables the first energy conversion device to generate electricity, and / or the hydrogen output through the high-pressure hydrogen storage device serves as the cold source for the second power generation group. The first low-temperature thermal storage device is also connected to the second power generation group to provide a heat source for the second power generation group, so that the second energy conversion device can generate electricity. The metallurgical reaction unit is connected downstream of the green power generation unit. The metallurgical reaction unit includes a reactor that can receive hydrogen output through the green power generation unit for metallurgical reduction reaction. The furnace top recovery unit is connected downstream of the metallurgical reaction unit to recover the energy generated by the reaction in the metallurgical reaction unit and can be supplied to the metallurgical reaction unit and / or the second power generation group as a heat source.

[0006] According to an embodiment of this application, the green power generation unit includes a first power generation group and a second power generation group, which are connected in series between the green hydrogen preparation unit and the metallurgical reaction unit.

[0007] According to an embodiment of this application, the second power generation unit further includes an evaporation device, a condensation device, and a working fluid pump. The condensation device, the working fluid pump, the evaporation device, and the second energy conversion device are connected end to end in sequence to form a working fluid circulation loop. The first low-temperature heat storage device is connected to the evaporation device to provide a heat source to the evaporation device, and the hydrogen output from the high-pressure hydrogen storage device provides a cold source to the condensation device, so that the organic working fluid circulates in the organic working fluid circulation loop to drive the second energy conversion device to generate electricity.

[0008] According to an embodiment of this application, the furnace top recovery unit includes a high-temperature heat storage device, a dust removal device, and a water-hydrogen separation device. The high-temperature heat storage device is connected to the reactor to recover heat from the exhaust gas. The high-temperature heat storage device includes a first outlet and a second outlet. The metallurgical reaction unit is connected to the first outlet to heat the hydrogen output from the green power generation unit before it enters the metallurgical reaction unit. The dust removal device is connected to the second outlet to remove dust from the exhaust gas. The water-hydrogen separation device is connected downstream of the dust removal device and connected to the high-pressure hydrogen storage device to recover hydrogen from the exhaust gas and transport the hydrogen to the high-pressure hydrogen storage device for storage.

[0009] According to an embodiment of this application, the furnace top recovery unit further includes a second compression device and a second low-temperature heat storage device. The second compression device is connected downstream of the water-hydrogen separation device, and the second low-temperature heat storage device is connected downstream of the second compression device. The second compression device can compress the hydrogen output from the water-hydrogen separation device and then transport it to the high-pressure hydrogen storage device for storage via the second low-temperature heat storage device.

[0010] According to an embodiment of this application, a second cryogenic thermal storage device is connected to a second power generation unit, and the second cryogenic thermal storage device can provide a heat source for the second power generation unit.

[0011] According to an embodiment of this application, the metallurgical reaction unit further includes a heating device connected between the green power generation unit and the reactor to heat the hydrogen output from the green power generation unit before it enters the reactor. The power source for the heating device is the green power generation unit.

[0012] According to an embodiment of this application, the heating device is a plasma heating device.

[0013] According to an embodiment of this application, the electrolytic hydrogen production device is connected to a green power generation unit, and the power source of the electrolytic hydrogen production device is the green power generation unit.

[0014] According to an embodiment of this application, the electrolytic hydrogen production device is connected to a water-hydrogen separation device to receive water output from the water-hydrogen separation device as a source of raw materials for electrolysis.

[0015] The hydrogen metallurgical production system provided in this application includes a green hydrogen production unit, a green power generation unit, a metallurgical reaction unit, and a furnace top recovery unit. In the green hydrogen production unit, green electricity is input into an electrolytic hydrogen production device, where water is electrolyzed to produce hydrogen. The generated hydrogen is then compressed by a first compression device, and heat is recovered by a first low-temperature heat storage device before being stored in a high-pressure hydrogen storage device. In the green power generation unit, the hydrogen output from the high-pressure hydrogen storage device enters a first power generation unit to drive a first energy conversion device for power generation; and / or serves as a cold source for a second power generation unit. Simultaneously, the first low-temperature heat storage device provides heat to the second power generation unit, jointly driving the second energy conversion device for power generation. In the metallurgical reaction unit, the hydrogen output from the green power generation unit enters a reactor to undergo a metallurgical reduction reaction with raw materials such as metal ores inside the furnace, yielding metal products. In the furnace top recovery unit, the energy generated by the reaction in the metallurgical reaction unit is recovered and supplied to the metallurgical reaction unit for preheating, or supplied to the second power generation unit as a heat source, further improving energy utilization efficiency. This application embodiment achieves tiered and cyclical energy utilization through the collaborative work of multiple units, thereby improving energy efficiency. The entire production process uses green electricity and hydrogen as energy and reducing agents, reducing emissions of pollutants such as carbon dioxide and realizing the greening of the metallurgical process. The various units are closely connected to form a complete hydrogen metallurgical production system, which improves production efficiency and stability. Attached Figure Description

[0016] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar features.

[0017] Figure 1 This is a schematic diagram of the structure of a hydrogen metallurgical production system provided in an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of another hydrogen metallurgical production system provided in the embodiments of this application;

[0019] Figure 3 This is a schematic diagram of the structure of another hydrogen metallurgical production system provided in the embodiments of this application;

[0020] Figure 4 This is a schematic diagram of another hydrogen metallurgical production system provided in the embodiments of this application.

[0021] Explanation of reference numerals in the attached figures:

[0022] 100. Green hydrogen production unit; 110. Electrolytic hydrogen production device; 120. First compression device; 130. First low-temperature heat storage device; 140. High-pressure hydrogen storage device;

[0023] 200. Green power generation unit; 210. First power generation unit; 211. First energy conversion device; 212. First expander; 213. First generator; 220. Second power generation unit; 221. Second energy conversion device; 222. Second expander; 223. Second generator; 224. Condensation device; 225. Working fluid pump; 226. Evaporation device;

[0024] 300. Metallurgical reaction unit; 310. Reactor; 320. Heating device;

[0025] 400. Furnace top recovery unit; 410. High-temperature heat storage device; 420. Dust removal device; 430. Water-hydrogen separation device; 440. Second compression device; 450. Second low-temperature heat storage device. Detailed Implementation

[0026] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0027] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] Hydrogen, with its high calorific value, strong reducing properties, and zero carbon emissions, is considered the cleanest energy source and can be used to replace carbon-based energy sources in the reduction of iron oxides. Currently, the main processes using hydrogen to produce direct reduced iron (DRE) are the MIDREX and Energiron-Zero Reformer processes. The biggest difference between these two processes lies in the reforming of the reducing gas. In the MIDREX process, the heating reformer is directly connected to the shaft furnace; in the Energiron-Zero Reformer process, due to the higher pressure inside the shaft furnace, the reducing gas undergoes reforming within the furnace itself. Both processes involve cracking natural gas to produce H2 and CO, which are then introduced into the shaft furnace to react with iron oxides and produce sponge iron. However, due to the scarcity of oil and gas resources, natural gas is unsuitable as a feedstock for DRE production. Furthermore, existing DRE production systems lack effective low-grade waste heat recovery methods, hindering the improvement of energy efficiency. Therefore, a hydrogen metallurgical system that achieves both zero carbon emissions and high energy efficiency is lacking.

[0030] In view of the above problems, this application provides a hydrogen metallurgical production system to solve the problems of low energy utilization efficiency and poor system integration in existing hydrogen metallurgical technologies, and to achieve efficient utilization of clean energy and greening of the metallurgical process.

[0031] Please see Figures 1 to 3The hydrogen metallurgical production system provided in this application includes: a green hydrogen production unit 100, a green power generation unit 200, a metallurgical reaction unit 300, and a furnace top recovery unit 400. The green hydrogen production unit 100 includes an electrolytic hydrogen production device 110, a first compression device 120, a first low-temperature heat storage device 130, and a high-pressure hydrogen storage device 150, all interconnected. The electrolytic hydrogen production device 110 converts green electricity into hydrogen gas, which is then output through the high-pressure hydrogen storage device 150 after passing through the first low-temperature heat storage device 130. The green power generation unit 200 is connected downstream of the green hydrogen production unit 100 and includes a first power generation group 210 and / or a second power generation group 220. The first power generation group 210 is equipped with a first energy conversion device 211, and the second power generation group 220 is equipped with a second energy conversion device 221. The output is obtained through the high-pressure hydrogen storage device 150. Hydrogen gas passes through the first power generation unit 210 as the kinetic energy source for the first power generation unit 210, enabling the first energy conversion device 211 to generate electricity, and / or the hydrogen gas from the high-pressure hydrogen storage device 150 and the first power generation unit 210 serves as the cold source for the second power generation unit 220. The first low-temperature heat storage device 130 is also connected to the second power generation circuit to provide a heat source to the second power generation circuit, enabling the second energy conversion device 221 to generate electricity. The metallurgical reaction unit 300 is connected downstream of the green power generation unit 200. The metallurgical reaction unit 300 includes a reactor 310, which can receive hydrogen gas output from the green power generation unit 200 for metallurgical reduction reaction. The furnace top recovery unit 400 is connected downstream of the metallurgical reaction unit 300 to recover the energy generated by the reaction in the metallurgical reaction unit 300 and can supply a heat source to the metallurgical reaction unit 300 and / or the second power generation unit 220.

[0032] In this embodiment, the green hydrogen production unit 100 includes an electrolytic hydrogen production device 110, a first compression device 120, a first cryogenic heat storage device 130, and a high-pressure hydrogen storage device 150, all interconnected. The electrolytic hydrogen production device 110 converts green electricity into hydrogen gas, which is then passed through the first cryogenic heat storage device 130 and output through the high-pressure hydrogen storage device 150. In this process, the use of green electricity ensures the cleanliness of the hydrogen production process, and the first cryogenic heat storage device 130 effectively recovers and stores the heat generated during hydrogen production, improving energy efficiency.

[0033] The electrolytic hydrogen production device 110 is a key piece of equipment for green hydrogen production. This application does not limit the specific type of the electrolytic hydrogen production device 110; for example, it can be an alkaline water electrolysis hydrogen production device or a proton exchange membrane water electrolysis hydrogen production device. Green electricity is input into the electrolytic hydrogen production device 110, and hydrogen is generated through the electrolysis of water.

[0034] This application does not limit the source of green electricity; the source of green electricity can be diverse. For example, it can be generated by collecting solar energy and converting it into electrical energy through solar photovoltaic power plants, or by converting wind energy into electrical energy through wind turbines, or by generating electricity from hydropower plants or geothermal power plants. Green electricity from solar photovoltaic power plants, wind power plants, hydropower plants, geothermal power plants, etc., is fed into the electrolysis hydrogen production device 110, where hydrogen is generated by electrolyzing water.

[0035] If an alkaline water electrolysis hydrogen production device is used, the water in the electrolyte is electrolyzed by green electricity, and the generated hydrogen is compressed by the first compression device 120, the heat is recovered by the first low-temperature heat storage device 130, and finally stored in the high-pressure hydrogen storage device 150. If a proton exchange membrane water electrolysis hydrogen production device is used, the process is similar, but the reaction principle and equipment details are different.

[0036] The first compression unit 120 is connected downstream of the electrolytic hydrogen production unit 110. Its main function is to increase the pressure of the hydrogen, so that the hydrogen meets the storage requirements of the subsequent high-pressure hydrogen storage unit 150, as well as the hydrogen pressure requirements of the green power generation unit 200, the metallurgical reaction unit 300, etc. Hydrogen at the appropriate pressure can participate in subsequent stages more efficiently, ensuring the stable operation of the entire hydrogen metallurgical production system.

[0037] This application does not limit the compression principle of the first compression device 120. Exemplarily, the first compression device 120 adopts the principle of a piston compressor, which has one or more cylinders inside, and a piston is provided in each cylinder. When the motor drives the crankshaft to rotate, the crankshaft converts the rotational motion into the reciprocating linear motion of the piston through the connecting rod. During the piston's intake stroke, a negative pressure is formed in the cylinder, and external hydrogen enters the cylinder through the intake valve under the action of the pressure difference. During the piston's compression stroke, the piston compresses the hydrogen in the cylinder, causing the hydrogen pressure to rise. Subsequently, the high-pressure hydrogen is discharged from the cylinder through the exhaust valve and enters the subsequent first cryogenic heat storage device 130.

[0038] After being compressed by the first compression device 120, the hydrogen pressure is significantly increased. On the one hand, this increases the hydrogen storage density, enabling the high-pressure hydrogen storage device 150 to store more hydrogen and provide a sufficient hydrogen source for subsequent production. On the other hand, it meets the hydrogen pressure requirements of the high-pressure gas-driven equipment in the green power generation unit 200, thereby improving power generation efficiency. In addition, the first compression device 120 increases the internal energy of the hydrogen by mechanically increasing the hydrogen pressure, and this increased internal energy can be collected and used.

[0039] The electrolysis temperature varies depending on the type of hydrogen electrolysis device. For example, the operating temperature of an alkaline water electrolysis hydrogen production device is 60-90℃. Within this temperature range, it is beneficial to reduce electrolyte viscosity, accelerate ion movement, and improve conductivity and electrolysis efficiency. The operating temperature of a proton exchange membrane water electrolysis hydrogen production device is 50-80℃. Within this temperature range, the proton exchange membrane has high conductivity, which can reduce the battery's internal resistance and ensure the structural stability and durability of the membrane electrode assembly and catalyst, thus improving the performance and efficiency of the electrolyzer. Typically, the electrolysis temperature is above 50℃. During electrolysis, electrical energy causes water to decompose into hydrogen and oxygen, and the generated hydrogen carries a large amount of heat. Subsequently, the hydrogen enters the first compression device 120, which further increases the hydrogen pressure through mechanical work. During this process, the internal energy of the hydrogen increases, and the heat it contains further increases.

[0040] Please continue reading. Figures 1 to 3 The first low-temperature heat storage device 130 is connected downstream of the first compression device 120. Its function is to collect and store the heat carried and added during the electrolysis and compression of hydrogen. This stored heat can be used in the subsequent green power generation unit 200 to provide a heat source; in addition, the stored heat can be used for a wide range of other purposes, such as preheating raw materials, supplying domestic hot water, and drying agricultural products, etc., and this application is not limited to these. The first low-temperature heat storage device 130 can be connected to the reactor 310 of the metallurgical reaction unit 300, so that the stored heat can also be transferred to the metallurgical reaction unit 300 to preheat raw materials such as metal ores in the reactor 310, reduce the additional energy input required for the reaction, increase the metallurgical reduction reaction rate, and thus improve the production efficiency and quality of metal products. The recovery and utilization of heat reduces energy waste, improves the energy utilization efficiency of the entire hydrogen metallurgical production system, and conforms to the concept of green environmental protection and sustainable development.

[0041] In this embodiment, the first low-temperature heat storage device 130 is a device capable of storing low-temperature heat and releasing it for use when needed. Exemplarily, the first low-temperature heat storage device 130 includes a heat storage medium, an insulating shell, and a heat exchanger. The insulating shell uses high-performance insulation materials, such as polyurethane foam or aerogel, to reduce heat loss and maintain a low-temperature environment inside the device. The heat exchanger is responsible for heat input and output. When heat needs to be stored, the heat generated by the compression of high-temperature hydrogen gas is transferred to the heat storage medium through the heat exchanger. When heat needs to be released, the organic working fluid in the green power generation unit 200 that needs to be heated absorbs the heat released by the heat storage medium through the heat exchanger. It is understood that the first low-temperature heat storage device 130 can also be equipped with control components such as temperature sensors and flow control valves to precisely regulate the heat storage and release process according to the system's heat requirements, ensuring efficient and stable operation of the low-temperature heat storage device.

[0042] The high-pressure hydrogen storage device 150 is connected downstream of the first cryogenic heat storage device 130 and serves as the hydrogen storage center, storing the hydrogen produced in the green hydrogen production unit 100 after electrolysis, compression, and heat recovery. The high-pressure hydrogen storage device 150 provides a stable supply of hydrogen to the subsequent green power generation unit 200 and metallurgical reaction unit 300. Furthermore, the high-pressure stored hydrogen meets the hydrogen pressure requirements of different units; for example, in the metallurgical reaction unit 300, higher-pressure hydrogen helps improve the reaction rate and efficiency.

[0043] For example, the high-pressure hydrogen storage device 150 can hold hydrogen gas at a pressure of 20 MPa. Correspondingly, the high-pressure hydrogen storage device 150 can be made of high-strength, high-pressure-resistant, and hydrogen-embrittlement-resistant materials. For example, special alloy steel or high-performance composite materials can be selected to withstand the enormous pressure generated by high-pressure hydrogen gas while preventing hydrogen permeation from degrading the material properties. Furthermore, to monitor the hydrogen storage status in real time, the device should be equipped with high-precision pressure sensors, temperature sensors, and hydrogen leak detection devices to promptly detect and address potential problems.

[0044] The green power generation unit 200 is connected downstream of the green hydrogen production unit 100. The green power generation unit 200 can generate electricity using the hydrogen released from the high-pressure hydrogen storage device 150. In the embodiments of this application, the green power generation unit 200 may include only the first power generation group 210, or only the second power generation group 220, or both the first power generation group 210 and the second power generation group 220.

[0045] Please see Figure 1 When the green power generation unit 200 is configured with only the first power generation group 210, the first power generation group 210 is equipped with a first energy conversion device 211. The first energy conversion device 211 uses high-pressure gas to drive work and convert kinetic energy into electrical energy. In the working state, the high-pressure hydrogen gas output from the high-pressure hydrogen storage device 150 enters the first power generation group 210, driving the first energy conversion device 211 to generate electricity. The generated electrical energy can be directly output for subsequent use.

[0046] Exemplarily, the first energy conversion device 211 includes a first expander 212 and a first generator 213 connected to each other. High-pressure hydrogen gas output from the high-pressure hydrogen storage device 150 enters the expander. Without combustion, the high-pressure hydrogen gas forms a high-speed airflow that impacts the impeller of the expander. The impeller begins to rotate under the impact of the high-speed airflow, thereby converting the pressure energy of the hydrogen gas into the mechanical energy, i.e., kinetic energy, of the impeller. The impeller is connected to the rotor of the generator. As the impeller rotates, the rotor of the generator rotates synchronously, cutting magnetic field lines in the magnetic field of the stator, and thus generating electrical energy according to the principle of electromagnetic induction. The first energy conversion device 211 in this embodiment can also be other devices containing an impeller; this application is not limited to this.

[0047] Although the hydrogen gas has undergone energy conversion and its pressure has decreased, it still retains a high level of chemical energy. The hydrogen can then be transported to the metallurgical reaction unit 300 to participate in subsequent metallurgical reduction reactions. For example, during the transport process, a dedicated pressure regulating device can be used to adjust the hydrogen pressure to a range suitable for the metallurgical reaction, ensuring that the hydrogen can smoothly participate in the subsequent metallurgical reduction reaction.

[0048] Please see Figure 2 When the green power generation unit 200 is configured with only the second power generation group 220, the second power generation group 220 is equipped with a second energy conversion device 221. The second power generation group 220 can generate electricity using the low temperature generated by the hydrogen output from the high-pressure hydrogen storage device 150 and the thermal energy stored in the first low-temperature heat storage device 130. When the high-pressure hydrogen storage device 150 outputs hydrogen, the hydrogen will experience a temperature drop due to pressure changes, thus transforming into low-temperature hydrogen. This low-temperature hydrogen serves as the cold source for the second power generation group 220 and has heat absorption capacity. At the same time, the first low-temperature heat storage device 130 has recovered and stored thermal energy during the initial green hydrogen preparation process. This stored thermal energy is transported to the second power generation group 220 through heat transfer pipes, serving as a heat source in the power generation process. In the second power generation group 220, a significant temperature difference is formed between the heat source and the cold source, creating the conditions for the second energy conversion device 221 to generate electricity. Utilizing this temperature difference, through a specific energy conversion mechanism, the conversion of thermal energy into electrical energy is achieved, thereby achieving the purpose of power generation by the second energy conversion device 221.

[0049] Exemplarily, the second power generation unit 220 also includes a first heat exchange device and a second heat exchange device, which are connected to form a power generation circuit. Hydrogen gas flows out of the high-pressure hydrogen storage device 150 and enters the first heat exchange device. In the first heat exchange device, the hydrogen gas utilizes its low-temperature characteristics to absorb heat from the power generation medium, thereby cooling the power generation medium. Simultaneously, the first low-temperature heat storage device 130 is connected to the second power generation unit 220, providing a heat source to the second power generation unit 220. The heat stored in the first low-temperature heat storage device 130 is transferred to the second heat exchange device of the second power generation unit 220 through a heat transfer medium to heat the power generation medium. The heated power generation medium vaporizes into high-temperature, high-pressure steam. This high-pressure steam enters the second energy conversion device 221, driving the first energy conversion device 211 to generate electricity, which can be directly output for subsequent use.

[0050] Exemplarily, the second energy conversion device 221 includes a second expander 222 and a second generator 223. High-temperature, high-pressure working fluid steam drives the impeller of the second expander 222 to rotate, converting thermal energy into mechanical energy. The impeller is connected to the second generator 223, thereby driving the second generator 223 to generate electricity. The exhaust gas discharged from the second expander 222 exchanges heat with hydrogen, which serves as a cold source, in the first heat exchange device. After releasing heat, it re-condenses into a liquid state and is then pumped back to the evaporator by the working fluid pump 225, completing one cycle. The second energy conversion device 221 in this embodiment can also be other devices containing an impeller; this application is not limited to these.

[0051] After heat exchange, the hydrogen gas, acting as a cold source, retains a high level of chemical energy and can be further transported to the metallurgical reaction unit 300 to participate in subsequent metallurgical reduction reactions. For example, during the transport process, a dedicated pressure regulating device can be used to adjust the hydrogen pressure to a range suitable for the metallurgical reaction, ensuring that the hydrogen gas can smoothly participate in the subsequent metallurgical reduction reaction.

[0052] When the green power generation unit 200 includes both the first power generation group 210 and the second power generation group 220, the first power generation group 210 and the second power generation group 220 can be connected in parallel. In this way, part of the hydrogen output from the high-pressure hydrogen storage device 150 can enter the first power generation group 210 to generate electricity, and the other part can enter the second power generation group 220 as a cold source. The waste heat generated by the first power generation group 210 and the heat from the first low-temperature heat storage device 130 together provide a heat source for the second power generation group 220, thus achieving power generation in a coordinated manner.

[0053] Please see Figure 3 In some embodiments, when the green power generation unit 200 includes both the first power generation group 210 and the second power generation group 220, the first power generation group 210 and the second power generation group 220 may be connected in series between the green hydrogen preparation unit 100 and the metallurgical reaction unit 300.

[0054] The first power generation unit 210 is connected to the green hydrogen production unit 100 and the metallurgical reaction unit 300. In operation, high-pressure hydrogen gas output from the high-pressure hydrogen storage device 150 enters the first power generation unit 210. The pressure energy generated during the release of the high-pressure hydrogen gas drives the first energy conversion device 211 to generate electricity, converting mechanical energy into electrical energy. For example, pressure is converted into kinetic energy through a device similar to the first expander 212. The expander's impeller rotates at high speed under the impact of the high-pressure hydrogen gas. The impeller is connected to the rotor of the first generator 213, thereby driving the first generator 213 to generate electricity, achieving the initial conversion of pressure energy into electrical energy.

[0055] After the hydrogen is generated by the first power generation unit 210, its pressure and temperature decrease due to energy release. This further cooled hydrogen is then transported to the second power generation unit 220 as its cold source. Simultaneously, the thermal energy stored in the first low-temperature thermal storage device 130 during the initial green hydrogen preparation process is transferred to the second power generation unit 220 via a heat transfer pipeline, serving as a heat source for the power generation process. In the second power generation unit 220, a significant temperature difference exists between the heat source and the cold source, creating the conditions for the second energy conversion device 221 to generate electricity. Utilizing this temperature difference, through a specific energy conversion mechanism, thermal energy is converted into electrical energy, thereby achieving the purpose of power generation by the second energy conversion device 221.

[0056] For example, within the second power generation unit 220, based on technologies such as the organic Rankine cycle, the temperature difference between the heat source and the cold source drives the second energy conversion device to generate electricity. For instance, the organic working fluid vaporizes under the action of the heat source, becoming high-temperature, high-pressure steam, which drives the impeller of the second expander 222 to rotate, thereby driving the second generator 223 to generate electricity. The exhaust gas discharged from the expander exchanges heat with low-temperature hydrogen, releases heat, and re-condenses into a liquid state, completing the cycle. The hydrogen, acting as the cold source, retains a high level of chemical energy after the heat exchange, and can be further transported to the metallurgical reaction unit 300 to participate in subsequent metallurgical reduction reactions.

[0057] In this embodiment, the first power generation unit 210 and the second power generation unit 220 can be connected in series between the green hydrogen preparation unit 100 and the metallurgical reaction unit 300, thereby realizing the cascade utilization of hydrogen energy. First, kinetic energy is used to generate electricity, and then cold energy and low-temperature thermal energy are used to generate electricity, which further improves the energy utilization efficiency of the system.

[0058] Metallurgical reaction unit 300 is connected downstream of green power generation unit 200. Metallurgical reaction unit 300 includes a reactor 310, which receives hydrogen gas output from green power generation unit 200 for metallurgical reduction reactions. Clean hydrogen gas is used as the reducing agent in the metallurgical reaction. The reduction reaction occurs within reactor 310, producing water vapor. The furnace top gas contains only unused hydrogen gas and water vapor, and can be recycled, resulting in almost no pollutant emissions. Exemplarily, the metallurgical reaction includes iron smelting: Fe₂O₃ + H₂ = Fe + H₂O. Metallurgical reaction unit 300 can also be used for smelting other metals; however, this application does not specifically limit the embodiments.

[0059] Understandably, the reactor 310 may include a furnace body, a heating device, a gas conveying device, and a material conveying device. The furnace body provides a suitable reaction space for the metallurgical reduction reaction, ensuring the reaction proceeds fully. The heating device provides the necessary heat for the reaction, employing methods such as resistance heating or induction heating to heat the materials. The heating device can precisely control the furnace temperature to meet the stringent temperature requirements of different metallurgical reactions. The gas conveying device is responsible for delivering hydrogen output from the green power generation unit 200 to the reactor 310 and ensuring uniform hydrogen distribution. The gas conveying device includes components such as an inlet pipe and a gas distributor. The inlet pipe can be made of corrosion-resistant and pressure-resistant materials to ensure safe and stable hydrogen delivery. The gas distributor can be designed with a special structure, such as a perforated plate or nozzle, to allow hydrogen to contact the raw materials, such as metal ores, evenly, promoting efficient metallurgical reduction reactions. The material conveying device transports the raw materials, such as metal ores, into the reactor 310 and discharges the metal products and waste residue after the reaction. This device can be a screw conveyor, belt conveyor, etc., selected according to actual production needs and the layout of reactor 310. The material conveying device can achieve continuous and stable material conveying, ensuring the continuity of metallurgical production.

[0060] The type of reactor 310 is not limited in the embodiments of this application. The type of reactor 310 can be diverse. For example, the reactor 310 can be a vertical shaft furnace, a fluidized bed furnace, or a rotary kiln, etc.

[0061] The furnace top recovery unit 400 is connected downstream of the metallurgical reaction unit 300, recovering the energy generated by the reaction in the metallurgical reaction unit 300 and supplying it as a heat source to the metallurgical reaction unit 300 and / or the second power generation unit 220. This achieves energy recycling and reduces energy waste.

[0062] In summary, the hydrogen metallurgical production system provided in this application includes a green hydrogen production unit 100, a green power generation unit 200, a metallurgical reaction unit 300, and a furnace top recovery unit 400. In the green electricity hydrogen production unit, green electricity is input into the electrolytic hydrogen production device 110, which electrolyzes water to produce hydrogen. The generated hydrogen is then compressed sequentially by the first compression device 120, and the first low-temperature heat storage device 130 recovers the heat before finally storing it in the high-pressure hydrogen storage device 150. In the green power generation unit 200, the hydrogen output from the high-pressure hydrogen storage device 150 enters the first power generation group 210 to drive the first energy conversion device 211 to generate electricity; and / or serves as a cold source for the second power generation group 220. Simultaneously, the first low-temperature heat storage device 130 provides a heat source to the second power generation group 220, jointly driving the second energy conversion device 221 to generate electricity. In the metallurgical reaction unit 300, the hydrogen output from the green power generation unit 200 enters the reactor 310 and undergoes a metallurgical reduction reaction with raw materials such as metal ores in the furnace to obtain metal products. In the furnace top recovery unit 400, the energy generated by the reaction in the metallurgical reaction unit 300 is recovered and transported back to the metallurgical reaction unit 300 for preheating, etc., or to the second power generation unit 220 as a heat source, further improving energy utilization efficiency. This embodiment of the application achieves cascaded and cyclical energy utilization through the collaborative work of multiple units, improving energy utilization efficiency; the entire production process uses green electricity and hydrogen as energy and reducing agents, reducing emissions of pollutants such as carbon dioxide, and realizing the greening of the metallurgical process; the various units are closely connected to form a complete hydrogen metallurgical production system, improving production efficiency and stability.

[0063] Please continue reading. Figure 3 In some embodiments, the second power generation unit 220 further includes an evaporator 226, a condenser 224, and a working fluid pump 225. The condenser 224, the working fluid pump 225, the evaporator 226, and the second energy conversion device 221 are connected end to end to form a working fluid circulation loop. The first low-temperature heat storage device 130 is connected to the evaporator 226 to provide a heat source to the evaporator 226, and the hydrogen output from the high-pressure hydrogen storage device 150 provides a cold source to the condenser 224, so that the organic working fluid circulates in the organic working fluid circulation loop to drive the second energy conversion device 221 to generate electricity.

[0064] In this embodiment, the condenser 224, the working fluid pump 225, the evaporator 226, and the second energy conversion device 221 are connected end-to-end via pipelines to form a working fluid circulation loop. Hydrogen gas output from the high-pressure hydrogen storage device 150 or the first power generation unit 210 is transported to the condenser 224 via pipelines to provide it with a cold source; the condenser 224 serves as the first heat exchange device. The first low-temperature heat storage device 130 is connected to the evaporator 226 via heat transfer pipelines to provide it with a heat source; the evaporator 226 serves as the second heat exchange device.

[0065] In the working fluid circulation loop, the liquid power generation working fluid is first transported to the evaporator 226 via the working fluid pump 225. Inside the evaporator 226, heat from the first low-temperature heat storage device 130 is transferred to the power generation working fluid, causing it to absorb heat and vaporize into high-temperature, high-pressure steam. This high-temperature, high-pressure steam enters the second energy conversion device 221, driving its internal impeller and other components to rotate, thereby driving the second generator 223 to generate electricity, realizing the conversion of thermal energy into electrical energy. The exhaust gas discharged from the second energy conversion device 221 enters the condenser 224, where low-temperature hydrogen absorbs the heat from the exhaust gas, causing it to condense back into liquid power generation working fluid. The liquid power generation working fluid then re-enters the next cycle via the working fluid pump 225.

[0066] The embodiments of this application do not limit the specific type of power generation medium. For example, the power generation medium is an organic medium. For example, the power generation medium includes one or more of R134a, R245fa, R1234yf, R1234ze(e), n-pentane, and isopentane.

[0067] The second power generation unit 220 in this embodiment fully utilizes the thermal energy stored in the first low-temperature thermal storage device 130 and the cold energy of the hydrogen output from the high-pressure hydrogen storage device 150, achieving cascaded energy utilization. On the one hand, it improves the power generation efficiency of the second power generation unit 220, greatly enhancing the comprehensive energy utilization rate compared to a single energy utilization method; on the other hand, the stable operation of the organic working fluid circulation loop ensures the continuity and stability of the power generation process, providing reliable power support for the entire hydrogen metallurgical production system.

[0068] Please see Figures 1 to 3 In some embodiments, the furnace top recovery unit 400 includes a high-temperature heat storage device 410, a dust removal device 420, and a water-hydrogen separation device 430. The high-temperature heat storage device 410 is connected to the reactor 310 to recover heat from the exhaust gas. The high-temperature heat storage device 410 includes a first outlet and a second outlet. The metallurgical reaction unit 300 is connected to the first outlet to heat the hydrogen output from the green power generation unit 200 before it enters the metallurgical reaction unit 300. The dust removal device 420 is connected to the second outlet to remove dust from the exhaust gas. The water-hydrogen separation device 430 is connected downstream of the dust removal device 420 and to the high-pressure hydrogen storage device 150 to recover hydrogen from the exhaust gas and transport the hydrogen to the high-pressure hydrogen storage device 150 for storage.

[0069] In this embodiment, the high-temperature heat storage device 410 is connected to the reactor 310 and is used to collect the high-temperature exhaust gas generated by the metallurgical reaction. The high-temperature heat storage device 410 has two outlets: the first outlet is connected to the metallurgical reaction unit 300, and the second outlet is connected to the dust removal device 420. Downstream of the dust removal device 420 is a water-hydrogen separator 430, which is in turn connected to the high-pressure hydrogen storage device 150, forming a continuous material handling path.

[0070] The high-temperature heat storage device 410 is a device capable of storing high-temperature heat and releasing it for use when needed. Exemplarily, the high-temperature heat storage device 410 includes a heat storage medium, an insulating shell, and a heat exchanger. When the metallurgical reaction unit 300 generates high-temperature exhaust gas, the exhaust gas first enters the high-temperature heat storage device 410. Inside the high-temperature heat storage device 410, the heat of the exhaust gas is absorbed and stored. Subsequently, the heat stored in the high-temperature heat storage device 410 is transferred to the metallurgical reaction unit 300 through the first outlet to preheat the hydrogen or materials that are about to enter. The exhaust gas, after heat storage, enters the dust removal device 420 through the second outlet. The dust removal device 420 can remove dust impurities from the exhaust gas. Exemplarily, the dust removal device 420 can use filtration, electrostatic adsorption, or other technologies for dust removal. After dust removal, the exhaust gas enters the water-hydrogen separation device 430, which uses physical or chemical separation methods to separate the hydrogen and water vapor in the exhaust gas. The pure hydrogen is then transported to the high-pressure hydrogen storage device 150 for storage.

[0071] Through the coordinated operation of this series of devices, the furnace top recovery unit 400 achieves efficient utilization of both energy and materials. In terms of energy, the recovered heat is used to preheat hydrogen or materials, reducing additional energy consumption and improving energy efficiency. In terms of materials, the recovered hydrogen is recycled, reducing hydrogen waste, lowering production costs, and also reducing pollutant emissions, aligning with the concept of green and environmentally friendly production.

[0072] The recovered hydrogen can be used as a reducing agent in metallurgical reactions or it can release heat through combustion to provide heat for reactor 310.

[0073] Please see Figure 4 In some embodiments, the furnace top recovery unit 400 further includes a second compression device 440 and a second low-temperature heat storage device 450. The second compression device 440 is connected downstream of the water-hydrogen separator 430, and the second low-temperature heat storage device 450 is connected downstream of the second compression device 440. The second compression device 440 can compress the hydrogen output from the water-hydrogen separator 430 and then transport it to the high-pressure hydrogen storage device 150 for storage via the second low-temperature heat storage device 450.

[0074] Downstream of the metallurgical reaction unit 300, it includes a high-temperature heat storage device 410, a dust removal device 420, a water-hydrogen separation device 430, a second compression device 440, and a second low-temperature heat storage device 450.

[0075] In this embodiment, the outlet of the water-hydrogen separator 430 is connected to the second compression device 440, the outlet of the second compression device 440 is connected to the second cryogenic heat storage device 450, and the second cryogenic heat storage device 450 is ultimately connected to the high-pressure hydrogen storage device 150. The hydrogen separated by the water-hydrogen separator 430 enters the second compression device 440, which compresses the hydrogen through mechanical work, increasing the hydrogen pressure. The compressed hydrogen then enters the second cryogenic heat storage device 450, which recovers and stores the heat generated during hydrogen compression. Finally, the processed hydrogen is transported to the high-pressure hydrogen storage device 150 for storage.

[0076] The second compression device 440 increases the pressure of the recovered hydrogen to meet the storage requirements of the high-pressure hydrogen storage device 150, ensuring the integrity and efficiency of hydrogen recovery. The second cryogenic heat storage device 450 recovers the heat generated during hydrogen compression. This heat can be stored and used for various purposes, achieving energy recovery and utilization. Furthermore, the hydrogen temperature is lower after heat recovery, making it more suitable for transport to the high-pressure hydrogen storage device 150 for storage. This further improves the energy utilization efficiency of the entire system, reduces energy waste, and conforms to the concept of green environmental protection.

[0077] Similar to the first cryogenic heat storage device 130, the second cryogenic heat storage device 450 is a device capable of storing low-temperature heat and releasing it for use when needed. Exemplarily, the second cryogenic heat storage device 450 includes a heat storage medium, an insulating shell, and a heat exchanger. The insulating shell uses high-performance insulation materials, such as polyurethane foam or aerogel, to reduce heat loss and maintain a low-temperature environment inside the device. The heat exchanger is responsible for heat input and output. When heat needs to be stored, the heat generated by the compression of high-temperature hydrogen gas is transferred to the heat storage medium through the heat exchanger; when heat needs to be released, the organic working fluid in the green power generation unit 200 that needs to be heated absorbs the heat released by the heat storage medium through the heat exchanger. It is understood that the second cryogenic heat storage device 450 can also be equipped with control components such as temperature sensors and flow control valves to precisely regulate the heat storage and release process according to the system's heat requirements, ensuring efficient and stable operation of the cryogenic heat storage device.

[0078] Please continue reading. Figure 4 In some embodiments, the second low-temperature heat storage device 450 is connected to the second power generation unit 220, and the second low-temperature heat storage device 450 can provide a heat source for the second power generation unit 220.

[0079] The second low-temperature heat storage device 450 is connected to the second power generation unit 220, and the heat stored therein can provide a heat source for the second power generation unit 220; specifically, the second low-temperature heat storage device 450 is connected to the evaporation device 226 in the second power generation unit 220.

[0080] In the entire system, the second cryogenic heat storage device 450 of the furnace top recovery unit 400 is connected at one end to the second compression device 440 to recover the heat generated by hydrogen compression; the other end is connected to the evaporation device 226 of the second power generation unit 220, providing it with a heat source. This connection method closely links the furnace top recovery unit 400 with the green power generation unit 200, realizing cross-unit energy transfer and efficient utilization. A stable heat source supply ensures the stable operation of the organic Rankine cycle in the second power generation unit 220, thereby ensuring the stability of the power supply for the entire hydrogen metallurgical production system. In addition, efficient energy utilization means less energy consumption, indirectly reducing greenhouse gas emissions, which is in line with the concept of green and environmentally friendly development.

[0081] Please continue reading. Figure 4 In some embodiments, the metallurgical reaction unit 300 further includes a heating device 320, which is connected between the green power generation unit 200 and the reactor 310 to heat the hydrogen output by the green power generation unit 200 before it enters the reactor 310. The power source of the heating device 320 is the green power generation unit 200.

[0082] The heating device 320 is connected between the green power generation unit 200 and the reactor 310. The heating device 320 includes an electrical input terminal, a hydrogen input terminal and an output terminal. Its electrical input terminal is connected to the green power generation unit 200, the hydrogen input terminal receives the hydrogen output by the green power generation unit 200, and the output terminal is connected to the reactor 310, which is responsible for delivering the heated hydrogen to the reactor 310.

[0083] The green power generation unit 200 generates electricity while outputting hydrogen. The hydrogen enters the heating device 320, which operates using the electricity provided by the green power generation unit 200. The heating device 320 heats the hydrogen to a preset temperature through methods such as resistance wire heating and electromagnetic induction. The heated hydrogen is then output from the heating device 320 and enters the reactor 310. Inside the reactor 310, the heated hydrogen comes into full contact with raw materials such as metal ores, and a metallurgical reduction reaction takes place under suitable temperature and pressure conditions to obtain metal products.

[0084] The heating device 320 raises the temperature of the hydrogen entering the reactor 310, increasing the activity of hydrogen molecules and allowing for a more complete reaction with metal oxides in the metal ore. This shortens the reaction time, improves the yield and quality of the metal products, and enhances the rate and efficiency of the metallurgical reduction reaction. Simultaneously, the heating device 320 is powered by electricity generated by the green power generation unit 200, achieving rational utilization of internal energy and further improving energy efficiency while reducing the input of external energy.

[0085] In some embodiments, the heating device 320 is a plasma heating device 320.

[0086] The plasma heating device 320 is a heating device that uses plasma to generate high temperatures. Plasma is the fourth state of matter (besides solid, liquid, and gas), composed of ionized gas and containing free electrons, ions, and neutral particles. The plasma heating device 320 generates high-temperature plasma by ionizing gas, and uses its high-energy characteristics to rapidly heat target materials (such as hydrogen).

[0087] In the hydrogen metallurgical production system of this application embodiment, the plasma heating device 320 provides the necessary heat for the reduction reaction in the reactor 310 by rapidly heating hydrogen to a high temperature, which significantly improves the system's reaction efficiency and energy utilization.

[0088] Please see Figures 1 to 3 In some embodiments, the electrolytic hydrogen production device 110 is connected to the green power generation unit 200, and the power source of the electrolytic hydrogen production device 110 is the green power generation unit 200.

[0089] The green power generation unit 200 is connected to the electrolysis hydrogen production unit 110 via a transmission line to ensure a stable power supply. For example, the transmission line is equipped with voltage regulation, current control and other devices to ensure that the transmitted power meets the operating requirements of the electrolysis hydrogen production unit 110.

[0090] During operation, the green power generation unit 200 converts the energy of hydrogen into electrical energy. The generated electricity is transmitted to the electrolysis hydrogen production unit 110 via transmission lines. The electrolysis hydrogen production unit 110 uses this electrical energy to electrolyze water, breaking it down into hydrogen and oxygen. The generated hydrogen is then compressed sequentially by the first compression unit 120 to increase its pressure, meeting subsequent storage and usage requirements; it then enters the first low-temperature heat storage unit 130 to recover the heat generated during the hydrogen production and compression process; finally, it is stored in the high-pressure hydrogen storage unit 150.

[0091] This connection method and energy utilization mode achieve closed-loop utilization of energy within the system. On the one hand, it reduces dependence on the external power grid and mitigates the risks associated with unstable external energy supply; on the other hand, it improves energy utilization efficiency, promptly utilizing excess electricity generated by the green power generation unit 200 and avoiding energy waste. Simultaneously, it further demonstrates the green and environmentally friendly characteristics of the entire hydrogen metallurgical production system, reducing potential additional carbon emissions from acquiring external power.

[0092] In some embodiments, the electrolytic hydrogen production device 110 is connected to the water-hydrogen separation device 430 to receive water output from the water-hydrogen separation device 430 as a source of electrolytic raw materials.

[0093] In the furnace top recovery unit 400, the tail gas generated by the metallurgical reaction enters the water-hydrogen separation device 430 after dust removal. The water-hydrogen separation device 430 separates the hydrogen and water in the tail gas. The separated water is transported to the electrolytic hydrogen production device 110 through a water pipeline. The electrolytic hydrogen production device 110 uses the electrical energy provided by the green electricity or green power generation unit 200 to carry out an electrolytic reaction using the input water as raw material, decomposing the water into hydrogen and oxygen.

[0094] The electrolytic hydrogen production unit 110 is connected to the water-hydrogen separation unit 430, enabling partial recycling of water resources and greatly improving the system's resource utilization efficiency. On the one hand, it reduces dependence on external water sources and mitigates risks caused by unstable external water supply or water quality fluctuations; on the other hand, it reduces water consumption and production costs throughout the hydrogen metallurgical production system. Simultaneously, by recovering water from the exhaust gas, wastewater discharge is reduced, aligning with green environmental protection principles and further enhancing the system's sustainability.

[0095] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A hydrometallurgical production system, characterized in that, The application relates to a green hydrogen production unit, a green power generation unit, a metallurgical reaction unit and a top recovery unit. The green hydrogen production unit comprises electrolytic hydrogen production equipment, a first compression device, a first low-temperature heat storage device and a high-pressure hydrogen storage device, the electrolytic hydrogen production equipment can convert green electricity into hydrogen, the hydrogen passes through the first low-temperature heat storage device and is output through the high-pressure hydrogen storage device. The green power generation unit is connected downstream of the green hydrogen production unit, the green power generation unit comprises a first power generation group and / or a second power generation group, the first power generation group is provided with a first energy conversion device, the second power generation group is provided with a second energy conversion device, the hydrogen output through the high-pressure hydrogen storage device is used as a source of kinetic energy of the first power generation group to make the first energy conversion device generate electricity, and / or the hydrogen output through the high-pressure hydrogen storage device is used as a cold source of the second power generation group, the first low-temperature heat storage device is further connected to the second power generation group to provide a heat source for the second power generation group, so that the second energy conversion device generates electricity. The metallurgical reaction unit is connected downstream of the green power generation unit, the metallurgical reaction unit comprises a reaction furnace, the reaction furnace can receive hydrogen output through the green power generation unit to perform a metallurgical reduction reaction. The top recovery unit is connected downstream of the metallurgical reaction unit, recovers energy generated by the metallurgical reaction unit, and can deliver a heat source to the metallurgical reaction unit and / or the second power generation group.

2. The hydrometallurgical production system according to claim 1, characterized in that, The green power generation unit comprises the first power generation group and the second power generation group, and the first power generation group and the second power generation group are connected in series between the green hydrogen production unit and the metallurgical reaction unit.

3. A hydrometallurgical production system according to claim 1 or 2, c h a r a c t e r i z e d in that The second power generation group further comprises an evaporation device, a condensation device and a working medium pump, the condensation device, the working medium pump, the evaporation device and the second energy conversion device are sequentially and circularly connected to form a working medium circulation loop. The first low-temperature heat storage device is connected to the evaporation device to provide a heat source for the evaporation device, and the hydrogen output through the high-pressure hydrogen storage device provides a cold source for the condensation device, so that the organic working medium circulates in the organic working medium circulation loop to drive the second energy conversion device to generate electricity.

4. The hydrometallurgical production system according to claim 1 or 2, characterized in that, The top recovery unit comprises a high-temperature heat storage device, a dust removal device and a water-hydrogen separation device. The high-temperature heat storage device is connected to the reaction furnace to recover heat in tail gas, the high-temperature heat storage device comprises a first outlet and a second outlet, the metallurgical reaction unit is communicated with the first outlet to heat hydrogen output through the green power generation unit before entering the metallurgical reaction unit, the dust removal device is communicated with the second outlet to remove dust in the tail gas, and the water-hydrogen separation device is connected downstream of the dust removal device and connected with the high-pressure hydrogen storage device to recover hydrogen in the tail gas and deliver the hydrogen to the high-pressure hydrogen storage device for storage.

5. The hydrometallurgical production system according to claim 4, characterized in that, The furnace top recovery unit further comprises a second compression device and a second low-temperature heat storage device, the second compression device is connected downstream of the water-hydrogen separation device, the second low-temperature heat storage device is connected downstream of the second compression device, the second compression device can compress the hydrogen gas output by the water-hydrogen separation device and then deliver the hydrogen gas to the high-pressure hydrogen storage device through the second low-temperature heat storage device for storage.

6. The hydrometallurgical production system according to claim 5, characterized in that, The second low-temperature heat storage device is connected to the second power generation group, and the second low-temperature heat storage device can provide a heat source for the second power generation group.

7. The hydrometallurgical production system of claim 1, wherein, The metallurgical reaction unit further comprises a heating device connected between the green power generation unit and the reaction furnace to heat the hydrogen gas output by the green power generation unit before entering the reaction furnace, and the heating device obtains electric energy from the green power generation unit.

8. The hydrometallurgical production system according to claim 7, characterized in that, The heating device is a plasma heating device.

9. The hydrometallurgical production system of claim 1, wherein, The electrolytic hydrogen production device is connected to the green power generation unit, and the electrolytic hydrogen production device obtains electric energy from the green power generation unit.

10. The hydrometallurgical production system of claim 4, wherein, The electrolytic hydrogen production device is connected to the water-hydrogen separation device to receive water output by the water-hydrogen separation device as an electrolysis raw material source.

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