Coal slurry electrolysis hydrogen production system and method based on wind energy power supply
By combining wind energy harvesting with power control and intelligent control units, the stable and efficient operation of the coal slurry electrolysis hydrogen production system driven by wind power has been achieved, solving the problem of electrolysis instability caused by wind power fluctuations and improving reaction efficiency and equipment lifespan.
Patent Information
- Application Number
- CN202511282774.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-09
- Publication Date
- 2025-12-12
AI Technical Summary
Existing coal slurry electrolysis hydrogen production technology faces problems such as unstable electrolysis process, low reaction efficiency, and short equipment life under wind power drive. In particular, it is difficult to maintain an effective reaction when wind power is highly volatile, and traditional systems lack integrated control strategies.
The wind energy harvesting and power control unit converts wind energy into pulse power. Combined with the intelligent control unit, the operating parameters are optimized through the GA-BP neural network to achieve the coordination of dynamic stirring and electrolysis reaction. The stirring is enhanced by wind mechanical energy and electrolysis is carried out through pulse current, forming a compact system integration.
It effectively reduces the overpotential of the anode reaction, reduces energy consumption, improves hydrogen production efficiency and system stability, and is suitable for various power supply environments, especially for coal-based resource conversion and hydrogen production in remote areas.
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Figure CN121110046A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of coal-based resource conversion and hydrogen energy utilization, and in particular to a coal slurry electrolysis hydrogen production system and method based on wind power supply. BACKGROUND
[0002] Hydrogen energy is a clean, efficient, and zero-carbon secondary energy source. Currently, water electrolysis is one of the mainstream technologies for green hydrogen production. However, its main problems are high energy consumption, high overpotential for anode oxygen evolution, and reliance on high-purity water and stable power supply, which limits its application in distributed and fluctuating renewable energy sources such as wind energy. In contrast, coal slurry electrolysis hydrogen production technology introduces carbon components in coal to participate in the anode reaction, replacing the high-energy oxygen evolution process. This approach not only reduces the reaction potential and energy consumption, but also has the advantages of handling coal slurry byproducts and broadening resource pathways. However, current coal slurry electrolysis hydrogen production technology still faces several key technical bottlenecks at the engineering level.
[0003] Firstly, existing electrolysis systems mostly use constant voltage or constant current power supply methods, which cannot adapt to the dynamic changes of the interfacial resistance during the coal slurry electrode reaction process in real time. During the process of gradual accumulation of coal particles and intensification of electrode polarization, it is difficult to maintain a suitable current density with fixed power supply mode, which can easily lead to a decrease in reaction rate, an increase in energy consumption, and even the induction of electrode deactivation.
[0004] Secondly, coal slurry is a high-concentration heterogeneous system with high viscosity and uneven particles. Thick boundary layers and gas bubbles are easily formed on the electrode surface, hindering the diffusion of reactants and the transfer of electrons, and causing severe concentration polarization. In traditional systems, static stirring or natural convection is often used to maintain the uniformity of coal slurry, but it is difficult to refresh the electrode interface in a short time, leading to insufficient anode reaction and limited hydrogen production rate.
[0005] On the other hand, wind energy, as a renewable energy source for driving electrolysis, has natural intermittency and fluctuation characteristics. Changes in wind speed directly affect the stability of the output current. Existing wind-driven schemes mostly use electrical energy paths to supply electrolysis, failing to fully utilize the mechanical energy part of the wind shaft. Moreover, they lack active response mechanisms for electrolysis state when wind speed changes, which can easily cause voltage fluctuations and current interruptions, affecting reaction sustainability and equipment life.
[0006] In addition, current coal slurry electrolysis systems are mostly in the laboratory small test stage, with loose system structure, lack of coupling between power supply, stirring, and reaction, and no integrated reaction control strategy suitable for wind energy characteristics. It is difficult to meet the engineering demand of long-term stable and efficient hydrogen production under actual wind field operating conditions. SUMMARY
[0007] In view of the problems in the prior art, the present application provides a coal slurry electrolysis hydrogen production system and method based on wind energy power supply, which realizes process control and system integration of continuous electrolysis of coal slurry in a dynamic stirring state driven by wind energy, and solves key problems such as strong wind power fluctuation, unstable electrolysis process, and low coal slurry electrode reaction efficiency.
[0008] The technical scheme of the present application is as follows: In a first aspect of the present application, a coal slurry electrolysis hydrogen production system based on wind energy power supply is provided, characterized in that it comprises: a wind energy collection and power regulation unit for converting wind energy into electric energy, stabilizing and pulse-modulating the electric energy, and providing the electrolysis reaction unit with the electric energy; a coal slurry preparation and stirring intensification unit for mixing low-rank coal, dispersing agent, and dilute acid or dilute alkali, and stirring to prepare coal slurry using wind energy mechanical energy and delivering the coal slurry to the electrolysis reaction unit; an electrolysis reaction unit provided with electric energy by the wind energy collection and power regulation unit, and electrolyzing the coal slurry using pulse current to make the coal slurry undergo oxidation-reduction reaction to obtain hydrogen; an intelligent control unit for adjusting the operating parameters of the coal slurry electrolysis hydrogen production system, the operating parameters including current set value, stirring speed, and pulse modulation parameters.
[0009] In some embodiments of the present application, the wind energy collection and power regulation unit comprises a wind turbine generator, a rectification and voltage stabilization module, an electrolysis power supply controller, and a pulse controller; the wind turbine generator converts wind energy into alternating current and provides the rectification and voltage stabilization module with the alternating current; the rectification and voltage stabilization module converts the alternating current into direct current; the electrolysis power supply controller adjusts the direct current to output a set range of electrolysis power supply; and the pulse controller performs pulse modulation on the basis of the electrolysis power supply to output a pulse power supply, which is provided to the electrolysis reaction unit.
[0010] In some embodiments of the present application, the wind energy collection and power regulation unit further comprises an energy storage module for storing excess electric energy.
[0011] In some embodiments of the present application, the coal slurry preparation and stirring intensification unit comprises a mixing and stirring device mechanically directly connected to the main shaft of the wind turbine generator for driving; the mixing and stirring device is used for mixing crushed low-rank coal with dispersing agent, dilute acid or dilute alkali to form coal slurry; and the coal slurry is delivered to the electrolysis reaction unit by the mixing and stirring device.
[0012] In some embodiments of the present application, the electrolysis reaction unit comprises an electrolysis tank, a cathode and an anode are arranged in the electrolysis tank, and a cation exchange membrane is arranged between the cathode and the anode.
[0013] In some embodiments of the present application, a gas separation and purification unit is further included, which comprises a condenser, a gas-liquid separator and a pressure swing adsorption device connected in sequence, and the condenser is connected with the cathode gas outlet of the electrolysis reaction unit through a gas conveying pipe.
[0014] In some embodiments of the present application, the intelligent control unit comprises an embedded controller and a collection module connected with each other, the embedded controller is built-in with a GA-BP neural network model, and the collection module comprises a wind speed sensor and a current-voltage collector installed on the wind energy collection and power regulation unit, a stirring speed sensor installed on the coal slurry preparation and stirring intensification unit, and an electrolyte temperature sensor installed on the electrolysis reaction unit.
[0015] In the second aspect of the present application, a coal slurry electrolysis hydrogen production method based on wind energy power supply is provided, which comprises the following steps: The wind energy collection and power regulation unit converts wind energy into electric energy, and supplies the electric energy to the electrolysis reaction unit after voltage stabilization and pulse modulation; The coal slurry preparation and stirring intensification unit uses the mechanical energy of wind energy to mix and stir low-rank coal, dispersant and dilute acid or dilute alkali; The electrolysis reaction unit uses the pulse current provided by the wind energy collection and power regulation unit to electrolyze the coal slurry, thereby producing hydrogen; The intelligent control unit optimizes the operating parameters in real time through the GA-BP model, so as to ensure that the stirring process and the electrolysis reaction are dynamically coordinated according to the wind speed.
[0016] In some embodiments of the present application, the frequency of the pulse power source applied to the electrolysis reaction unit is 30-50 Hz, and the duty cycle is 50-70%.
[0017] In some embodiments of the present application, the intelligent control unit optimizes the operating parameters in real time through the GA-BP model, which specifically comprises: Real-time monitoring of wind speed, prediction of electrolysis load capacity according to wind speed change and output of current set value; Adjusting the stirring speed according to the change of the current set value to ensure the uniformity of the coal slurry suspension; Real-time monitoring of the temperature of the electrolyte and the hydrogen production rate, and adjusting the frequency and duty cycle of the pulse power source to match the electrolysis reaction rate.
[0018] The one or more technical solutions of the present application have the following beneficial effects: (1) The system provided by the present application can convert the unstable energy of wind energy into pulse power to provide the coal slurry preparation electrolysis reaction unit, ensuring that the electrolysis reaction still maintains an effective reaction current density during power fluctuations, effectively avoiding problems such as electrolysis interruption, polarization abnormalities or reaction efficiency drops caused by wind speed fluctuations; compared with the traditional water electrolysis system, the oxygen evolution reaction is replaced by the coal slurry anode reaction, and the anode reaction overpotential is reduced by about 0.4-0.6V; after the stirring is strengthened, the overall electrolysis voltage of the system is reduced by about 15%, and the energy consumption per unit hydrogen production is reduced by about 18.5% under the same current density. If 1 Nm 3 / h of hydrogen production is targeted, the system energy consumption is controlled in the range of 3.4~3.7 kWh / Nm 3 , which is much lower than that of the pure water electrolysis system (≥4.5 kWh / Nm 3 ). (2) The system provided by the present application can directly provide mechanical energy generated by wind energy to the mixing and stirring device, not only realizing the conversion of wind energy into electrical energy for utilization, but also realizing the direct utilization of mechanical energy generated by wind energy.
[0019] (3) The intelligent control unit provided by the present application embeds a GA-BP model, which can optimize the operating parameters of the coal slurry electrolysis hydrogen production system in real time through the GA-BP model, and can realize the intelligent control of the stirring process and the electrolysis process in the system by adjusting the current setting value, the stirring speed and the pulse modulation parameters.
[0020] (4) The present application is suitable for various power supply environments such as micro-grid, wind power isolated network and distributed wind power station, and is especially suitable for on-site conversion of coal-based resources and hydrogen energy production in remote areas. The overall structure of the system is compact, the degree of automation is high, and it has good engineering deployment and expansion potential. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 is a schematic diagram of the coal slurry electrolysis hydrogen production system based on wind energy power supply. DETAILED DESCRIPTION
[0022] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.
[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is intended to include the plural form as well. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0024] Example 1 As described in the background section, existing technologies have shortcomings. To address the aforementioned technical problems, this invention proposes a wind-powered coal slurry electrolysis hydrogen production system, such as... Figure 1 As shown, it includes: The wind energy harvesting and power regulation unit is used to convert wind energy into electrical energy and then supply the electrical energy to the electrolysis reaction unit after voltage stabilization and pulse modulation. The coal slurry preparation and stirring enhancement unit is used to mix low-rank coal, dispersant and dilute acid or dilute alkali, and use wind power mechanical energy to stir and prepare coal slurry and transport it to the electrolysis reaction unit. The electrolysis reaction unit is powered by wind energy collection and power control unit. It uses pulsed current to electrolyze coal slurry, causing the coal slurry to undergo an oxidation-reduction reaction to produce hydrogen. The intelligent control unit is used to adjust the operating parameters of the coal slurry electrolysis hydrogen production system, including the current setpoint, stirring speed, and pulse modulation parameters.
[0025] In this embodiment, the wind energy harvesting and power regulation unit includes a wind turbine generator set, a rectification and voltage stabilization module, an electrolysis power controller, and a pulse controller. The wind turbine generator set converts wind energy into alternating current (AC) to supply the rectification and voltage stabilization module. The rectification and voltage stabilization module converts the AC to direct current (DC). The electrolysis power controller regulates the DC to output an electrolysis power supply within a set range. The pulse controller modulates the electrolysis power supply to output a pulse power supply, which is then supplied to the electrolysis reaction unit.
[0026] In one specific embodiment of this invention, the wind turbine generator set adopts a horizontal-axis three-bladed rotor with a rated power of 3kW, outputting three-phase AC power, which is converted into stable DC power (output range 30–60V, current 0–80A) by a rectification and voltage stabilization module. The electrolytic power controller adopts a constant current programmable DC power module with PID regulation function, the output voltage can be adjusted within the range of 1.5–2.5V, and the current density control range is 0.5–2.0A / cm². 2The electrolysis power supply controller communicates with the intelligent control unit to realize automatic matching and voltage response adjustment of the electrolysis load. The pulse controller superimposes a rectangular pulse signal on the basis of the electrolysis current to change the electrolysis current into a pulse current provided to the electrolysis reaction unit. The pulse frequency of the applied pulse signal is 30-50 Hz, and the duty cycle is 50-70% to enhance particle disturbance, promote bubble detachment, and reduce anode polarization. The pulse controller shares a PWM pulse trigger interface with the electrolysis power supply controller, and the intelligent control unit dynamically adjusts the pulse frequency and amplitude. By introducing the pulse electric field disturbance technology, a pulse signal (frequency 30-50 Hz, duty cycle 50-70%) is applied between the electrodes to effectively weaken the double-layer resistance and improve the charge transfer rate.
[0027] Further, the wind energy collection and power regulation unit further includes an energy storage module for storing excess electrical energy. The energy storage module can specifically adopt a 48 V / 100 Ah lithium iron phosphate battery pack, which is connected in parallel with the rectification and voltage stabilization module to absorb excess power and discharge compensation during power supply intervals.
[0028] In the present embodiment, the coal slurry preparation and stirring intensification unit includes a mixing and stirring device, the stirring shaft of the mixing and stirring device is mechanically directly connected to the main shaft of the wind turbine generator set for driving, and the mixing and stirring device is used to mix the crushed low-rank coal with a dispersing agent, dilute acid or dilute alkali to form a coal slurry, which is transported to the electrolysis reaction unit by the mixing and stirring device.
[0029] It can be understood that the main shaft of the wind turbine generator set is connected to the stirring shaft of the mixing and stirring device through a mechanical transmission mechanism. The mechanical transmission mechanism is a conventional structure, which utilizes the mechanical energy generated by the wind turbine generator set to drive the stirring shaft for stirring. The mechanical transmission mechanism includes a stepless speed changer, which is controlled by the intelligent control unit to realize speed change.
[0030] The low-rank coal is crushed by using an existing coal powder crushing device. The coal powder crushing device can adopt a hammer crusher and a wet ball mill. The raw coal is long flame coal or lignite. After primary crushing by the hammer crusher, it is sent to the wet ball mill for pulverization to a particle size of less than 100 microns. The coal powder is conveyed by a belt to the mixing and stirring device, mixed with dilute acid or dilute alkali at a mass ratio of 1:3, and at the same time, 0.5% to 1.0% of sodium polyacrylate is added as a dispersing stabilizer. After uniform mixing of the low-rank coal, the dispersing agent and the dilute acid or dilute alkali, the mixture is conveyed by a screw pump to a slurry storage tank for storage. The storage tank has a volume of 100 L, is provided with a liquid level meter and a feed inlet, and is provided with a discharge outlet at the bottom connected to the liquid inlet of the electrolytic cell to form a continuous liquid supply path for the coal slurry.
[0031] In the embodiment, the electrolysis reaction unit comprises an electrolytic cell, the electrolytic cell is provided with a cathode and an anode, and a cation exchange membrane is arranged between the cathode and the anode.
[0032] In a specific embodiment of the embodiment, the electrolytic cell is made of corrosion-resistant polypropylene, has a volume of 20 L, is internally provided with two graphite anodes and two stainless steel cathodes, and is provided with a cation exchange membrane between the anodes and the cathodes. The electrode size is 100 mm x 200 mm, the electrode spacing is 20 mm, and the effective area of the anode is 200 cm 2 .
[0033] Under the action of the electric field, the anode undergoes the following oxidation reaction: C(s) + 2H2O → CO2↑ + 4H + + 4e - The cathode reduces to produce hydrogen: 4H + + 4e - → 2H2↑.
[0034] In the embodiment, a gas separation and purification unit is further included, the gas separation and purification unit comprises a condenser, a gas-liquid separator and a pressure swing adsorption device connected in sequence, and the condenser is connected with the cathode gas outlet of the electrolysis reaction unit through a gas conveying pipe.
[0035] Specifically, the mixed gas generated in the electrolysis process is first introduced through the exhaust port at the top of the electrolytic cell, the mixed gas is cooled to below 30 DEG C through the condenser to condense the water in the mixed gas, then enters the gas-liquid separator to separate the water in the mixed gas, and then the gas enters the pressure swing adsorption device to remove impurities. The hydrogen gas after purification by the first-stage activated carbon tower (adsorbing H2S) and the second-stage molecular sieve tower (adsorbing CO2 and water vapor) has a purity of more than 99.97%, and the gas is conveyed to the gas storage tank or the fuel unit through the hydrogen gas outlet.
[0036] In the embodiment, the intelligent control unit comprises an embedded controller and a collection module connected with each other, the embedded controller is built-in with a GA-BP neural network model, and the collection module comprises a wind speed sensor and a current-voltage collector installed on the wind energy collection and power regulation unit, a stirring speed sensor installed on the coal slurry preparation and stirring intensification unit, and an electrolyte temperature sensor installed on the electrolysis reaction unit.
[0037] In a specific embodiment of the embodiment, the intelligent control unit adopts an ARM embedded controller built-in with a GA-BP neural network model.
[0038] The GA-BP neural network is a BP (back propagation) neural network using a genetic algorithm (GA) to optimize the weights and thresholds. The network structure includes three parts: an input layer, a hidden layer, and an output layer.
[0039] The number of input layer nodes: corresponds to the actual collected multi-source data dimensions, including wind speed, wind speed trend, coal slurry concentration, electrolyte temperature, electrolytic cell voltage, current density, stirring speed, etc.
[0040] The number of output layer nodes: corresponds to the optimized control parameters, mainly the current set value, stirring speed instruction, pulse electric field frequency and duty cycle.
[0041] Hidden layer: 3 layers are used, and the number of nodes is automatically optimized by the genetic algorithm to ensure the prediction accuracy and convergence speed.
[0042] The input of the GA-BP neural network model is: wind speed and its trend, coal slurry concentration, electrolyte temperature, electrolytic cell voltage, current density, stirring speed, etc.
[0043] The output of the GA-BP neural network model is: the optimal process control instruction, including the current density set value, stirring speed (rpm), pulse frequency (Hz), and duty cycle (%).
[0044] Before the model is applied, experimental data is used for training. The training steps are: The historical running data (wind speed, coal slurry properties, electrolytic load and stirring parameters, etc.) are used as input samples; The optimal hydrogen production rate, energy consumption, and current density set value, stirring speed, pulse electric field frequency, and duty cycle under system stability measured by experiments are used as output samples; The initial weights and thresholds of the BP network are optimized by GA to avoid local optimum; The nonlinear mapping relationship between input and output is obtained through iterative training.
[0045] The finally trained model can predict the optimal running parameters under different wind speeds and working conditions, realizing intelligent control of the system.
[0046] The specific process of adjusting the running parameters of the coal slurry electrolytic hydrogen production system by the intelligent control unit is as follows: 1. Data acquisition: real-time acquisition of wind speed, voltage, current, stirring speed, electrolyte temperature, etc., and input into the GA-BP neural network model.
[0047] 2. Prediction and decision-making: predict the wind speed trend through the neural network model, calculate the electrolytic load capacity combined with the current running state of the system; 3. Output optimal control instructions, including current density, stirring speed, pulse modulation parameters (pulse frequency and duty cycle).
[0048] 4. Execution and coordination: When the wind speed fluctuation is predicted to increase in the short term, the electrolysis current density is reduced in advance and the stirring speed is adjusted; when the wind speed is stable and the power supply is sufficient, the stirring speed is increased and the continuous stirring mode is switched on; when the voltage fluctuates frequently, the pulse electric field frequency and duty cycle are automatically adjusted to ensure system dynamic stability. Wherein, the wind speed stability refers to the wind speed fluctuation amplitude less than ±10% and lasting more than 60 seconds; the sufficient power supply refers to the voltage ≥1.8 V and the current density stable within the threshold ±5%.
[0049] The intelligent control unit can also realize the coordinated control of the stirring process and the electrolysis reaction process in the system, and the specific process is: Real-time monitoring of wind speed, predicting electrolysis load capacity according to wind speed changes and outputting current set value; Adjust the stirring speed according to the change of current set value to ensure the uniformity of coal slurry suspension; Real-time monitoring of electrolyte temperature and hydrogen yield, adjusting the frequency and duty cycle of pulse power to match the electrolysis reaction rate.
[0050] Example 2 In a typical embodiment of this embodiment, a coal slurry electrolysis hydrogen production system method based on wind power supply is provided, comprising the following steps: The wind energy collection and power regulation unit converts wind energy into electrical energy, and supplies the electrolysis reaction unit after voltage stabilization and pulse modulation; The coal slurry preparation and stirring intensification unit uses the mechanical energy of wind energy to mix and stir low-rank coal, dispersant and dilute acid or dilute alkali; The electrolysis reaction unit uses the pulse current provided by the wind energy collection and power regulation unit to electrolyze the coal slurry to produce hydrogen; The intelligent control unit optimizes the operating parameters in real time through the GA-BP model to ensure that the stirring process and electrolysis reaction dynamically coordinate according to the wind speed.
[0051] Further, the frequency of the pulse power applied to the electrolysis reaction unit is 30-50 Hz, and the duty cycle is 50-70%.
[0052] Further, the intelligent control unit optimizes the operating parameters in real time through the GA-BP model, which specifically includes: Real-time monitoring of wind speed, predicting electrolysis load capacity according to wind speed changes and outputting current set value; Adjust the stirring speed according to the change of current set value to ensure the uniformity of coal slurry suspension; The temperature and hydrogen production rate of the electrolyte are monitored in real time, and the frequency and duty cycle of the pulse power are adjusted to match the electrolysis reaction rate.
[0053] The above describes the specific embodiments of the present application in conjunction with the drawings, but is not a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications or variations made by those skilled in the art on the basis of the technical solutions of the present application without creative labor are still within the scope of protection of the present application.
Claims
1. A coal slurry electrolysis hydrogen production system based on wind power, characterized in that, include: The wind energy harvesting and power regulation unit is used to convert wind energy into electrical energy and then supply the electrical energy to the electrolysis reaction unit after voltage stabilization and pulse modulation. The coal slurry preparation and stirring enhancement unit is used to mix low-rank coal, dispersant and dilute acid or dilute alkali, and use wind power mechanical energy to stir and prepare coal slurry and transport it to the electrolysis reaction unit. The electrolysis reaction unit is powered by wind energy collection and power control unit. It uses pulsed current to electrolyze coal slurry, causing the coal slurry to undergo an oxidation-reduction reaction to produce hydrogen. The intelligent control unit is used to adjust the operating parameters of the coal slurry electrolysis hydrogen production system, including the current setpoint, stirring speed, and pulse modulation parameters.
2. The coal slurry electrolysis hydrogen production system based on wind power as described in claim 1, characterized in that, The wind energy harvesting and power regulation unit includes a wind turbine generator set, a rectification and voltage stabilization module, an electrolysis power controller, and a pulse controller. The wind turbine generator set converts wind energy into alternating current (AC) to supply the rectification and voltage stabilization module. The rectification and voltage stabilization module converts the AC to direct current (DC). The electrolysis power controller regulates the DC to output an electrolysis power supply within a set range. The pulse controller modulates the electrolysis power supply to output a pulse power supply, which is then supplied to the electrolysis reaction unit.
3. The coal slurry electrolysis hydrogen production system based on wind power as described in claim 2, characterized in that, The wind energy harvesting and power regulation unit also includes an energy storage module, which stores excess electrical energy.
4. The coal slurry electrolysis hydrogen production system based on wind power as described in claim 2, characterized in that, The coal slurry preparation and stirring enhancement unit includes a mixing and stirring device. The stirring shaft of the mixing and stirring device is mechanically directly connected to the main shaft of the wind turbine generator for driving. The mixing and stirring device is used to mix crushed low-rank coal with dispersant, dilute acid or dilute alkali to form coal slurry. The coal slurry is transported to the electrolysis reaction unit through the mixing and stirring device.
5. The coal slurry electrolysis hydrogen production system based on wind power as described in claim 1, characterized in that, The electrolysis reaction unit includes an electrolytic cell, in which a cathode and an anode are disposed, and a cation exchange membrane is disposed between the cathode and the anode.
6. The coal slurry electrolysis hydrogen production system based on wind power as described in claim 1, characterized in that, It also includes a gas separation and purification unit, which includes a condenser, a gas-liquid separator and a pressure swing adsorption device connected in sequence. The condenser is connected to the cathode gas outlet of the electrolysis reaction unit through a gas supply pipe.
7. The coal slurry electrolysis hydrogen production system based on wind power as described in claim 1, characterized in that, The intelligent control unit includes an embedded controller and a data acquisition module that are interconnected. The embedded controller has a built-in GA-BP neural network model. The data acquisition module includes a wind speed sensor and a current and voltage acquisition device installed on the wind energy harvesting and power regulation unit, a stirring speed sensor installed on the coal slurry preparation and stirring enhancement unit, and an electrolyte temperature sensor installed on the electrolysis reaction unit.
8. A method for producing hydrogen from coal slurry via wind power generation, employing the coal slurry electrolysis hydrogen production system as described in any one of claims 1-7, characterized in that, Includes the following steps: The wind energy harvesting and power control unit converts wind energy into electrical energy, and supplies the electrical energy to the electrolysis reaction unit after voltage stabilization and pulse modulation. The coal slurry preparation and stirring enhancement unit utilizes the mechanical energy of wind power to mix and stir low-rank coal, dispersant, and dilute acid or dilute alkali. The electrolysis reaction unit uses the pulsed current provided by the wind energy collection and power control unit to electrolyze the coal slurry and produce hydrogen. The intelligent control unit optimizes operating parameters in real time using the GA-BP model to ensure that the stirring process and electrolysis reaction operate dynamically and in coordination according to the wind speed.
9. The working method of the coal slurry electrolysis hydrogen production system based on wind power as described in claim 8, characterized in that, The frequency of the pulsed power supply applied to the electrolysis reaction unit is 30-50Hz, and the duty cycle is 50-70%.
10. The working method of the coal slurry electrolysis hydrogen production system based on wind power as described in claim 8, characterized in that, The intelligent control unit optimizes operating parameters in real time using the GA-BP model, specifically including: Real-time monitoring of wind speed; prediction of electrolytic load capacity based on wind speed changes; and output of current setpoint. Adjust the stirring speed according to the change of the current setting value to ensure the uniformity of coal slurry suspension; The temperature of the electrolyte and the hydrogen yield are monitored in real time, and the frequency and duty cycle of the pulse power supply are adjusted to match the electrolysis reaction rate.