2852 results about "Electrolytic cell" patented technology

The invention relates to the technical field of renewable energy hydrogen production and intelligent control, discloses a multi-target prediction control method and system based on an ALK-PEM hybrid electrolytic cell array, and solves the problems that in the prior art, wind and light power generation fluctuation cannot be deeply adapted, and hydrogen production economy, response speed and long-term reliability of equipment are difficult to consider. According to the scheme, the method comprises the following steps: obtaining wind-solar power generation power prediction data, and operating parameters and health state indexes of each ALK and PEM in a hybrid array to form a time sequence data set; a hybrid array prediction model based on data driving is constructed, a multi-target cost function is constructed by taking maximization of wind and light absorption, stable hydrogen production and minimization of equipment life loss as targets, rolling optimization is performed on the model, and an optimal power set point sequence of each electrolytic cell in a future preset time domain is solved; and in combination with the operating characteristic difference of the ALK and the PEM, a differential control instruction is generated and executed, and meanwhile, dynamic grouping management is performed on the hybrid array according to the wind-solar power prediction data and the health state of the electrolytic cell.

The invention relates to the technical field of industrial process control, and discloses an intelligent optimization control method of an alkaline water hydrogen production system, which comprises the following steps: a controller synchronously acquires real-time voltage, current and temperature data of an electrolytic bath; theoretical reversible voltage is calculated according to a Nernst equation, ohm voltage drop is eliminated, and a bubble additional impedance value representing the bubble coverage degree is analyzed; performing differential processing on the change rate of the bubble additional impedance value to generate a flow feed-forward control instruction, combining a feedback control instruction based on temperature deviation to synthesize a target rotating speed instruction, and driving an alkali liquor circulating pump to adjust the flow speed; according to the method, the bubble impedance observation model is constructed, so that zero-delay sensing and decoupling control over the state of bubbles in the electrolytic cell are achieved, hysteresis of single temperature feedback is eliminated, and the problems of actuator saturation and model aging drifting are solved.

The invention discloses an adaptive evaluation method for the health degree of an electrolytic cell, and the method comprises the following steps: collecting the multi-dimensional operation parameters of the electrolytic cell in real time, and carrying out the preprocessing of the collected time series data, so as to construct a training sample with a time window; extracting a multi-scale time sequence feature from the training sample to form a feature vector; inputting the feature vector into a weight adjustment network, and outputting a dynamic weight vector; weighting the feature vector by using the dynamic weight vector to generate a weighted feature vector; inputting the weighted feature vector into a performance prediction model, and outputting a short-term performance prediction value of the electrolytic cell at a future moment; after the corresponding real performance value is obtained, calculating a prediction error of the short-term performance prediction value, and constructing a reinforcement learning reward signal based on the prediction error; updating a strategy of the weight adjustment network through a reinforcement learning algorithm by utilizing a reward signal, thereby optimizing dynamic weight vector generation at a subsequent moment; based on the dynamic weight vector and the feature vector at the current moment, a comprehensive health degree index of the electrolytic bath is obtained through calculation; according to the method, main factors influencing the equipment health degree in different stages are intuitively revealed, and a basis is provided for operation and maintenance decision making.

The invention discloses an automatic electrochemical experiment platform, and relates to the technical field of electrochemical experiments. The powder cylinder frame is suitable for placing a powder cylinder; the sample bottle box is suitable for placing a sample bottle; a solid sample adding device; the liquid sample adding device is communicated with the liquid reagent bottle; a dissolving assisting device; a sampling device; the micro-channel flowing electrolytic tank is communicated with the sampling device; the electrochemical measuring device is electrically connected with the micro-channel flow electrolytic tank; the mechanical arm is suitable for moving the sample bottle among the sample bottle box, the solid sample adding device, the liquid sample adding device, the dissolving assisting device and the sampling device and is suitable for moving the powder barrel between the powder barrel frame and the solid sample adding device. The automatic electrochemical experiment platform provided by the embodiment of the invention has the advantages of high automation degree, high experiment efficiency, convenience for realizing high-throughput and standardized experiment requirements and the like.

The invention provides an off-grid synthetic ammonia park electrolytic bath column level-energy storage-hydrogen storage collaborative optimization method based on rolling optimization, and relates to the technical field of energy storage and hydrogen storage collaboration. The method comprises the following steps: constructing an off-grid system architecture comprising wind-solar power generation, a plurality of rows of electrolytic cells, energy and hydrogen storage equipment and a synthesis ammonia device; a multi-device collaborative optimization strategy based on an eight-hour rolling time domain is designed, the system operation state is divided into high, medium and low working conditions through a working condition recognition mechanism, a current device operation scheme is actively adjusted according to wind and light power information of a next scheduling period, and collaborative regulation and control of energy storage and hydrogen storage are achieved. Compared with a traditional scheduling strategy, the collaborative optimization strategy provided by the invention improves the consumption rate of renewable energy sources of the system, reduces abandoned wind and light, improves the yield of synthetic ammonia, and verifies the effectiveness of the strategy.

The invention provides an alkaline electrolytic cell temperature compound control method and system, a medium and equipment. The method comprises the steps that a full-process dynamic simulation model containing key process equipment meeting preset requirements in an electrolytic hydrogen production system is established; a feed-forward controller with current as input and feed-forward compensation amount as output is obtained through analysis of a full-process dynamic simulation model; based on the feed-forward compensation amount, the temperature of the electrolytic bath is stabilized at a set value under the change of the current I; a feedforward-cascade composite control system is constructed; and closed-loop control over the temperature of the electrolytic cell is completed based on a feedforward-cascade composite control system. According to the method, the feed-forward controller based on full-process dynamic simulation design is combined with cascade control, so that accurate lead compensation of wide-width current fluctuation is realized, the problem of response lag of single cascade control is effectively solved, and the dynamic response speed and the anti-interference capability of electrolytic bath temperature control are remarkably improved.

The invention provides a multi-target random capacity configuration method for a wind-solar complementary multi-tank cooperative hydrogen production system, and relates to the technical field of renewable energy hydrogen production. According to the method, under the uncertain condition, multi-dimensional key system indexes are considered, the single-cell power and number of PEM electrolytic cells and ALK electrolytic cells are finely matched, and a reasonable collaborative operation strategy is designed. On the basis of capacity configuration scheme design and multi-tank collaborative operation strategy optimization of the wind-solar complementary electrolytic hydrogen production system, a multi-target stochastic programming model considering wind-solar fluctuation output is developed, and collaborative optimization of continuous variables of rated capacity and operation power of each device and discrete variables of types, number and start-stop strategies of electrolytic tanks is realized. Aiming at the current situation that the current capacity configuration research mostly stays at the overall capacity ratio level and is lack of discussion on coupling optimization of the capacity, the number and the operation strategy of a single tank, the economic-energy efficiency-hydrogen production triple indexes of the system are effectively improved, and the global optimization of the capacity configuration of the all-off-grid wind-solar electrolytic hydrogen production system is realized.

The invention relates to the technical field of electrolytic aluminum monitoring and control, and provides an automatic control method and system for an aluminum electrolysis cell in the electrolytic aluminum process, and the method comprises the steps: A, collecting the operation parameters of the electrolysis cell in real time through a multi-source sensing array; b, constructing a dynamic material balance-heat balance coupling model, and inputting the operating parameters of the electrolytic cell into the dynamic material balance-heat balance coupling model for outputting alumina blanking rate data; c, according to the aluminum oxide blanking rate data change rate, temperature-polar distance cooperative control of the electrolytic cell is synchronously executed, and the optimal polar distance compensation amount is calculated according to the operation parameters; and D, constructing an electrolytic cell resistance change rate prediction model based on the LSTM neural network, and inputting the aluminum oxide blanking rate data change rate into the LSTM neural network structure model for outputting an aluminum oxide concentration compensation strategy. The change condition of the aluminum electrolysis cell in the aluminum electrolysis process can be rapidly and accurately monitored, and real-time control is provided.

The invention relates to an energy management method and system for a green electricity hydrogen production and hydrogenation all-in-one machine, and relates to the technical field of hydrogen energy application, the system comprises an upper layer control system and a communication interface module, collaborative optimization scheduling is executed in the day-ahead stage, the rolling stage and the real-time stage; the communication interface module supports IEC104, private UDP and other industrial protocols, and realizes real-time data interaction with a green electricity prediction system and a hydrogen production DCS system. The method comprises the following steps: making an electrolytic cell start-stop and power plan in a day-ahead stage; periodically correcting prediction and demand errors in a rolling stage; the power of the electrolytic cell is dynamically adjusted to fluctuate along with green electricity in the real-time stage. According to the invention, cross-section and multi-time scale coordination control is realized, and the green power consumption rate, the system operation economy and the hydrogen energy supply reliability are improved.

The invention discloses a water electrolysis hydrogen production fastening device and a use method thereof, and belongs to the technical field of water electrolysis hydrogen production, the water electrolysis hydrogen production fastening device comprises a first pressure equalizing rod and a second pressure equalizing rod, the first pressure equalizing rod and the second pressure equalizing rod are symmetrically arranged on the outer sides of the two to-be-fastened ends of an electrolytic bath in parallel, and first connecting rod assemblies are installed at the two ends of the first pressure equalizing rod; second connecting rod assemblies are installed at the two ends of the second pressure equalizing rod, the first connecting rod assemblies and the second connecting rod assemblies are symmetrically arranged relative to the electrolytic cell, and a driving mechanism is arranged between the first connecting rod assemblies and the second connecting rod assemblies and can drive the first connecting rod assemblies and the second connecting rod assemblies to move relatively. The problems that a traditional hydraulic fastening method is high in cost, uneven in pre-tightening force and low in efficiency are solved, uniform, accurate and efficient pressing and fastening operation on the electrolytic cell are achieved, and sealing safety of the electrolytic cell is guaranteed.

The invention relates to a method for manufacturing a bipolar plate (10, 51) for an electrochemical cell unit (53) for converting electrochemical energy into electrical energy as a fuel cell unit (1) and / or for converting electrical energy into electrochemical energy as an electrolytic cell unit (49) having stacked electrochemical cells (52), the method comprising the steps of: providing a first plate 64) and a second plate (65), stacking the first plate (64) and the second plate (65) on top of one another such that inner surfaces (66) of the first and second plate (64, 65) lie on top of one another, applying contact forces to the first and second plates (64, 65) by means of negative pressure in a negative pressure chamber (104) relative to an ambient pressure so that, as a result of the contact forces applied by the ambient pressure, the inner surfaces (66) of the first and second plate (64, 65) lie on top of one another with an additional compression force in a contact region (68) due to the applied contact forces, producing at least one welded joint (69) between the first and second plate (64, 65) by means of a laser beam (74), forming connection channels (89) for process fluids in the first and / or second plate (64, 65), the channels opening into fluid openings (41) in the bipolar plates (10), 51) and into channels (12, 13, 14) for process fluids in the bipolar plates (10, 51), forming connection openings (93) in the first and / or second plate (64, 65) which connect the connection channels (89) to the channels (12, 13, 14) for process fluids in the bipolar plates (10, 51), the connection openings (93) being formed in the first and / or second plate (64, 65) by means of a laser beam (74).

The invention relates to the technical field of wastewater treatment and resource recovery, and discloses an organophosphorus degradation and recovery system based on double-cathode electro-Fenton reaction, comprising: an electrolytic tank for accommodating organophosphorus wastewater to be treated; the anode is arranged in the electrolytic tank and is electrically connected with an anode of a power supply; the oxidizing agent generating cathode is arranged in the electrolytic tank and is used for generating hydrogen peroxide in situ under a power-on condition; the metal reduction cathode is arranged in the electrolytic tank and is used for adsorbing and reducing ferric ions; the metal source is composed of zero-valent iron or iron alloy, is not directly and electrically connected with the power source, and is arranged in an electric field acting area established by the anode and the at least one cathode. Through the design of inductive slow-release iron supply and double-cathode collaborative circulation, a series of problems of uncontrollable iron ion release, high iron sludge yield, low catalyst utilization efficiency, difficulty in resource recovery and the like in the traditional electro-Fenton technology are effectively solved.

A PEM (Proton Exchange Membrane) electrolytic bath test system relates to the technical field of proton exchange membrane electrolyzed water and comprises an electrolytic bath, a water replenishing and circulating water module, a produced gas pretreatment and analysis module, a nitrogen purging module, a condensation module, a data acquisition module, a control module and a power supply module. The water replenishing and circulating water module is provided with a water replenishing buffer branch and is used for weakening disturbance of low-temperature water to circulating water temperature during water replenishing; the produced gas pretreatment and analysis module comprises a hydrogen treatment system and an oxygen treatment system which are parallel to each other, and a dew point meter is arranged in the hydrogen treatment system and used for detecting the dew point of produced hydrogen. Through the design of the water replenishing buffer branch, the temperature of water entering the electrolytic bath is effectively stabilized; by integrating the dew-point meter, the capability of detecting the dryness of the gas produced by the electrolytic cell is expanded; the overall framework of the system is optimized, the test precision and the energy efficiency are improved, and the operation cost is reduced.

The invention discloses an electrolytic tank performance analysis method based on polarization feature recognition. The method comprises the steps that S1, electrolytic tank parameters are set, electrochemical testing is conducted, and EIS impedance data are obtained; s2, preprocessing the EIS impedance data: performing Kramers-Kronig verification on the EIS impedance data, calculating a relative residual error of the data, and selecting a regularization parameter lambda; s3, applying the EIS impedance data to DRT quantitative analysis: converting the EIS impedance data into a DRT spectrogram based on discretization of a radial basis function and a Tikhonov regularization method; and S4, performing DRT spectrogram identification by using a DRT method, establishing an ECM model, and evaluating the influence of metal cation pollution on PEMWE performance degradation by using the ECM model. According to the electrolytic cell performance analysis method based on polarization feature recognition, the core problem that all polarization processes and the evolution rule of the polarization processes in performance degradation are difficult to accurately analyze under the condition of high current density in the prior art is solved.

The utility model discloses a Coanda effect-based sand-proof and dust-proof device for an electrolytic bath, which is characterized in that a surrounding dust cover structure which is in flexible contact with the electrolytic bath or keeps a non-contact gap with the electrolytic bath is formed at the periphery of a full-bearing movable bracket, and the dust cover structure forms a semi-closed protection structure between a foundation and the electrolytic bath; dustproof cover structures composed of fences are arranged on the two sides of a foundation with profile steel as the foundation, each dustproof cover structure at least comprises a vertical fence wall arranged on the side portion of the full-bearing type movable bracket, the bottom of each vertical fence wall is connected with the foundation, and the top of each vertical fence wall makes flexible contact with the electrolytic cell or forms a non-contact gap with the electrolytic cell. A continuous variable-curvature Coanda curved surface is adopted, the airflow speed is increased through the wall attachment effect, a laminar flow air curtain is formed, and curvature-flow velocity coupling optimization is formed. Compressed air is injected through the narrow slit nozzle, ambient air is pried to form a large-flow air curtain, the actually measured air curtain coverage area is 3.2 times that of a traditional flow guide plate, and the unit energy consumption is reduced by 57%.

The invention discloses a preparation method of a bifunctional heterojunction catalyst for AEM electrolyzed water. The method comprises the following steps: step 1, mixing multi-walled carbon nanotubes, deionized water, absolute ethyl alcohol and inorganic acid; step 2, putting the mixed solution in the step 1 into an ultrasonic machine to form a porous structure and more active adsorption sites; step 3, carrying out freeze drying treatment on the mixed solution treated in the step 2; step 4, mixing the dried multi-walled carbon nanotubes with acetylacetone salt, and uniformly grinding the mixed powder; and step 5, putting the powder obtained in the step 4 into a tubular furnace, and carrying out heat treatment in the atmosphere of H2 / Ar to obtain the PtFeCoNiMoZr / ZrO heterojunction catalyst. The catalyst has a remarkable catalytic effect on HER and OER reactions, and meanwhile, stable electrolysis which stably runs for 200 hours in an AEM electrolytic cell under the current density of 1200 mA / cm < 2 > is successfully realized.

The invention discloses a hydrogen production system flexibility improving method based on multi-source cooperation and self-adaptive regulation and control, and belongs to the technical field of new energy. The method is executed by taking a digital twinborn body as a global decision center, and comprises the following steps: acquiring predicted data of wind-solar power generation power, a real-time frequency deviation signal of a power grid and an operation state of each electrolytic cell in a hydrogen production system; based on the prediction data and the frequency deviation signal of the wind-solar power generation power, a global optimization scheduling instruction is generated by taking improvement of the flexibility and the economy of the system as a target; according to the global optimization scheduling instruction, cooperatively controlling dynamic reconfiguration of the electrolytic cell and applying virtual synchronous generator (VSG) control to a hydrogen production load; and actual operation data after cooperative control are collected and fed back to the equipment fatigue loss analysis model and the wind and light output prediction model for dynamic correction of fatigue damage evaluation and power prediction in the next period. According to the method, the operation cost of the system is effectively reduced, and meanwhile the flexibility of the new energy hydrogen production system is greatly improved.

The invention discloses an electrolytic bath on-line monitoring system and electrolysis equipment, the electrolytic bath on-line monitoring system comprises a plurality of distributed integrated acquisition devices, a data collection platform and a real-time monitoring platform, each distributed integrated acquisition device comprises a substrate, a positioning pin, magnetic steel and a shell; the positioning pin is arranged below the shell; the magnetic steel is embedded in the shell; the substrate is arranged in the shell, and a first probe, a second probe, a voltage stabilizing chip, a sensor and a data acquisition unit are integrated on the substrate; the tail end of the first probe is connected with the data acquisition unit through the voltage-stabilizing chip, and the head end of the first probe abuts against the interior of the electrolytic cell; the head end of the second probe abuts against a small electrolysis chamber electrode of the electrolytic bath; the sensor is connected with the tail end of the second probe; the data acquisition unit is connected with the sensor; the data collection platform is connected with the data acquisition unit; and the real-time monitoring platform is connected with the data collection platform. The device is high in integration degree, convenient to install, capable of achieving self-powered operation, comprehensive in monitoring coverage and capable of achieving real-time and accurate monitoring of parameters of the large electrolytic cell.

The invention provides a collaborative optimization method of a mixed water electrolysis hydrogen production system considering seasonal wind and light fluctuation. The method comprises the following steps of: analyzing a wind-solar power frequency spectrum by adopting a variational mode decomposition algorithm, and extracting three intrinsic mode function components of ultrahigh frequency, transition frequency band and ultralow frequency; establishing a multi-time-scale collaborative optimization framework comprising a seasonal scheduling layer, an intra-day optimization layer and a real-time control layer; the ultra-low frequency component is distributed to an alkaline electrolytic bath, and the ultra-high frequency component is distributed to a proton exchange membrane electrolytic bath; an electric-thermal-life multi-field coupling efficiency optimization model is constructed, and multi-objective optimization of efficiency maximization and life loss and operation cost minimization is achieved; and an equipment switching critical point calculation method based on an efficiency curve second derivative and a gradient protection strategy are adopted. The method can effectively improve the adaptability of the system to seasonal fluctuation, the operation economy and the service life of equipment.

The invention provides an alkaline electrolytic cell electrothermal parameter global sensing and security situation assessment method and system, and the method comprises the following steps: obtaining global parameters through a sensing layer, including electrical parameters, thermal parameters, physical and chemical parameters, and visual and acoustic parameters; the method comprises the following steps: constructing an alkaline electrolytic cell multi-physical field high-fidelity model based on a physical and chemical principle according to global parameters, calculating a state which cannot be directly measured inside, performing redundant state estimation when a physical sensor fails, and positioning a fault source by reproducing and deducing in a virtual space when an anomaly occurs. The multi-physical-field high-fidelity model of the alkaline electrolytic cell comprises an electrochemical field, a mass transfer field, a fluid field and a thermodynamic field; and carrying out quantitative evaluation on the safety situation of the alkaline electrolytic cell according to the output of the multi-physical field high-fidelity model of the alkaline electrolytic cell. According to the method and the system for global sensing of the electrothermal parameters of the alkaline electrolytic cell and assessment of the safety situation, the operation efficiency and the safety of equipment are improved.

This invention provides a method for preparing (002) crystal-plane oriented metallic zinc and its application. The invention employs a two-electrode electrochemical deposition technique, using iron foil, titanium foil, or copper foil as the working electrode, commercial zinc foil as the counter electrode, and an aqueous zinc salt solution as the electrolyte. Constant current density discharge deposition is used to deposit (002) crystal-plane oriented metallic zinc on the working electrode; the constant current density is 50 mA cm⁻¹. ‑2 ~200 mA cm ‑2 The (002) crystal-plane oriented metallic zinc prepared by this invention can be used in rechargeable zinc-ion batteries. The two-electrode electrolytic cell device used in the preparation of metallic zinc in this invention is simple, the preparation process is straightforward, and the preparation method is more universal. The (002) crystal-plane oriented metallic zinc prepared according to the method of this invention can suppress zinc dendrite growth and hydrogen evolution, thereby improving the service life of rechargeable zinc-ion batteries.

The invention belongs to the technical field of PEM electrolytic cells, and particularly relates to a PEM electrolytic cell electrochemical performance detection device which comprises an electrolytic cell, a first test mechanism and a second test mechanism. The electrolytic bath comprises a base body, a hydrogen discharge pipe, a tee joint and a hydrogen storage tank connecting pipeline; the hydrogen discharging pipe is arranged on the base body, one end of the hydrogen discharging pipe is communicated with the tee joint, one opening of the tee joint is connected with the hydrogen storage tank connecting pipeline, the other opening of the tee joint is connected with the first testing mechanism, and the first testing mechanism is connected with the second testing mechanism; the first testing mechanism is used for testing the air pressure in the hydrogen storage tank connecting pipeline; and the second testing mechanism is used for testing the water content of the hydrogen. The first test mechanism and the second test mechanism are sequentially arranged on the hydrogen discharge passage of the electrolytic bath, so that the centralized detection of the hydrogen pressure and the water content is realized, and the problem of complex structure caused by multi-point arrangement of detection devices is avoided.

The invention discloses a hydrophobic gas diffusion electrode loaded with silver nanoparticles and application of the hydrophobic gas diffusion electrode in electrocatalytic carbon dioxide reduction, and belongs to the technical field of electrocatalysis. The hydrophobic gas diffusion electrode comprises a gas diffusion layer and a catalyst layer sprayed on the gas diffusion layer; the catalyst layer comprises a silver nanoparticle catalytic material, a first ionomer and a second ionomer; wherein the first ionomer is a fluororesin ionomer, and the second ionomer is a quaternized polysulfone ionomer. A system for preparing CO by reducing CO2 through electro-catalysis is constructed, the system comprises an MEA electrolytic cell, a cathode, an anode and an anion exchange membrane, and the cathode adopts the hydrophobic gas diffusion electrode loaded with the silver nanoparticles. The preparation method is mild in preparation condition and environmentally friendly, the modified hydrophobic gas diffusion electrode has high hydrophobicity, efficient conversion of CO2 can be achieved under the high current density, FECO can reach 96.5% under the high current density, and excellent catalytic performance is shown.

The invention discloses a hydrogen production alkali liquor circulation system adapting to wind and light fluctuation and a control method of the hydrogen production alkali liquor circulation system, and solves the problems that in the prior art, an alkali liquor circulation path of an alkali liquor circulation system is fixed, the adjusting capacity is limited, and a dynamic buffering and quick response mechanism is lacked. The separator is connected with an alkali liquor circulating pump, the alkali liquor circulating pump is connected with an inlet of the electrolytic cell, the alkali liquor circulating pump is connected with an alkali liquor circulating buffer tank, an automatic regulating valve is arranged between the alkali liquor circulating pump and the alkali liquor circulating buffer tank, and a flowmeter A is arranged between the separator and the alkali liquor circulating pump. A flow meter B is arranged between the alkali liquor circulating pump and the electrolytic bath, the alkali liquor circulating pump is connected with a frequency conversion control system, and the frequency conversion control system adjusts the operation frequency of the alkali liquor circulating pump according to a current signal of the electrolytic bath. The alkali liquor circulation flow is adjusted through current signal adjustment and a frequency conversion control strategy, and the response speed and stability of the system are improved.

The invention discloses an organophosphorus degradation and synchronous recovery system based on a double-cathode induced electro-Fenton reaction. An induced iron electrode plate and an electrochemical assembly with double cathode plates are arranged in an electrolytic tank; the double cathode plates are a gas diffusion cathode plate and an iron reduction cathode plate; the gas diffusion cathode is used for reducing oxygen to generate hydrogen peroxide, the induction iron electrode releases ferrous ions under the action of an electric field, the ferrous ions and the hydrogen peroxide are subjected to a Fenton reaction, organic phosphorus is degraded into PO4 < 3->, Fenton reaction by-products Fe < 3 + > and PO4 < 3-> form iron phosphorus precipitates, and degradation of the organic phosphorus and synchronous recovery of orthophosphate are realized; excessive Fe < 3 + > is adsorbed by the iron reduction cathode and is further reduced into Fe < 2 + > which enters the solution again to participate in the Fenton reaction, so that the reaction efficiency is improved, and Fe < 3 + > / Fe < 2 + > circulation is promoted while slow release of iron is realized. The device is simple in structure, low in maintenance cost and high in operability, and the purpose of efficiently recycling phosphorus resources is achieved.

The invention relates to the technical field of renewable energy source hydrogen production, and discloses an off-grid alkaline electrolysis total hot standby method based on multi-source waste heat deep integrated recovery, which comprises the following steps: S1, constructing a frame which comprises an electrolytic cell array, a graded waste heat recovery loop, a phase change heat storage tank and an auxiliary and emergency assembly; s2, synchronously capturing multi-source waste heat of the system: starting a circulating power assembly of a graded waste heat recovery loop, and synchronously collecting process cooling waste heat and product gas waste heat generated in the operation process of the electrolytic cell array through the graded waste heat recovery loop; and S3, heat storage and cascade distribution. By constructing an independent closed type grading waste heat recovery loop, alkali liquor cooling waste heat in the process of operating an electrolytic cell captures sensible heat of high-temperature wet oxygen at an outlet of an oxygen separator through the waste heat recovery heat exchangers connected in parallel, direct loss of the two kinds of waste heat is avoided, external power or fuel does not need to be relied on for supplying energy to hot standby, and energy consumption in the hot standby stage is greatly reduced.

The invention discloses an off-grid photovoltaic hydrogen production system double-layer optimization method, device and equipment and a storage medium, and the method comprises the steps: constructing an off-grid photovoltaic hydrogen production system based on a battery energy storage unit, a photovoltaic power generation unit and a hydrogen energy conversion unit, and constructing a double-layer optimization model comprising an upper-layer constant volume optimization model and a lower-layer operation optimization model; the upper-layer constant volume optimization model takes the maximization of the total yield of green hydrogen in the whole life cycle of the system as a target and takes the system capacity configuration as a decision variable; the lower-layer operation optimization model takes green hydrogen yield maximization in the current scheduling time period of the system as a target and takes a system operation strategy as a decision variable; and an optimal capacity configuration scheme and an optimal operation strategy are obtained by solving the double-layer optimization model, so that the utilization efficiency of the system on renewable energy sources is improved, the overall low-carbon benefit is enhanced, and the potential of the electrolytic cell is fully played.

The invention discloses an offshore wind power hydrogen production system two-stage scheduling method, system and equipment considering equipment life loss, and a storage medium, and relates to the field of integrated energy system optimization scheduling and control, and the method comprises the steps: proposing a two-stage optimization framework comprising intra-day rolling scheduling and real-time fatigue control; in the first stage, an intra-day rolling scheduling model considering life constraints is constructed based on wind power prediction, electrolytic cell parameters and the like, a time scale is selected for solving, and a start-stop decision and power distribution are generated; in the second stage, a fatigue damage prediction model is built through an attention mechanism according to historical data and introduced into minute-level real-time scheduling, and fan power optimization distribution and fatigue balance control are achieved; the method can obviously reduce the service life loss of the electrolytic cell and the fatigue damage of the fan, improve the wind power absorption rate and the hydrogen yield, and enhance the economical efficiency and reliability of the system.

The invention provides an alkaline electrolytic cell hydrogen evolution electrode and a preparation method thereof, and relates to the technical field of hydrogen evolution material preparation. A gradient electroplating method for a hydrogen evolution electrode of an alkaline electrolytic cell comprises the following steps that a two-electrode electroplating method is adopted, a nickel-based metal carrier serves as a cathode, the cathode is placed in electroplating liquid, and first electroplating is conducted at 3.0-4 V; carrying out second electroplating at 5.0-7.5 V and then carrying out third electroplating at 8.0-12V to obtain a hydrogen evolution electrode; the gradient evolution from a'nickel-rich binding layer 'to a'Ni-Fe-Mo transition layer' and then to a'molybdenum-rich catalytic layer 'from inside to outside is realized by applying progressive increase voltage in stages and inducing selective reduction of metal ions under different potential windows, the compatibility and interface bonding strength of a plating layer and a substrate are enhanced, meanwhile, a high-activity Mo component is enriched on the outer layer, and the plating layer is more stable in performance. The hydrogen evolution overpotential is remarkably reduced while the long-term stability is ensured, and a solution is provided for the alkaline electrolysis water hydrogen production electrode.

The invention relates to the technical field of new energy and energy storage, and provides a renewable energy hydrogen production control system based on dynamic power matching and hydrogen storage collaboration, which comprises a power conversion system with a constant voltage mode and constant power mode millisecond switching capability; the modularized electrolytic cell array is formed by connecting a plurality of proton exchange membrane electrolytic cells in parallel; the hydrogen storage cooperation unit comprises a high-pressure hydrogen storage tank group, a solid oxide fuel cell and a hydrogen purification device; the intelligent control unit is used for executing a three-stage control strategy; the real-time control layer is used for executing proton exchange membrane electrolytic cell power instruction tracking and power grid frequency deviation compensation; the optimization scheduling layer adopts a reinforcement learning model prediction control algorithm to perform rolling optimization on the power distribution proportion of hydrogen production and power generation; and the planning layer is used for generating a proton exchange membrane electrolytic cell start-stop plan and a hydrogen storage scheduling plan in combination with meteorological prediction and electricity market transaction data. The problems that wind-solar power generation fluctuation is large, and a traditional hydrogen production system is slow in response and insufficient in economical efficiency can be solved.