551 results about "High pressure hydrogen" patented technology

The invention relates to a cathode closed type air-cooled fuel cell for an unmanned aerial vehicle and a working method of the cathode closed type air-cooled fuel cell. The fuel cell comprises a hydrogen supply subsystem, an oxygen supply subsystem, a cooling path subsystem and an electric pile, the hydrogen supply subsystem and the oxygen supply subsystem complete heat exchange between liquid hydrogen and high-temperature air through a liquid hydrogen vaporizer, and the effects of liquid hydrogen vaporization and high-temperature air cooling are achieved. By arranging the first vortex tube to replace a traditional pressure reducing valve, potential energy of vaporized high-pressure hydrogen is recovered by the first vortex tube, the vaporized high-pressure hydrogen is separated into cold flow and hot flow in the first vortex tube, and the hot flow partially enters an end plate of the galvanic pile to heat the end plate, so that the temperature distribution in the galvanic pile is optimized, and the voltage consistency between single cells is improved; therefore, the performance and durability of the stack are improved. When the fuel cell is used for the unmanned aerial vehicle, the fan of the fuel cell is also used as a propeller of the unmanned aerial vehicle, so that the system integration level is increased.

The invention relates to a hydrogen supply system and a new energy automobile. The system comprises a liquid hydrogen module and a gas hydrogen module, wherein the liquid hydrogen module and the gas hydrogen module are used for respectively providing hydrogen and high-pressure hydrogen subjected to first pressurization treatment for a pressurization module; the first side of the recovery module is connected with the liquid hydrogen module, and the recovery module is used for receiving recovered gas hydrogen discharged by the liquid hydrogen module and obtaining pressurized recovered gas hydrogen; the second side of the recovery module is connected with the gas hydrogen module and is used for transmitting the pressurized recovered gas hydrogen to the gas hydrogen module; the pressurizing module is used for performing second pressurizing treatment and third pressurizing treatment on the hydrogen subjected to the first pressurizing treatment and the high-pressure hydrogen to obtain pressurized target hydrogen; the buffer module is used for supplying the supercharged target hydrogen to the engine module. By adopting the hydrogen supply system, under the condition of low liquid hydrogen storage pressure, the liquid hydrogen supply pressure can be effectively maintained, stable operation of a fuel cell is guaranteed, meanwhile, evaporated hydrogen of the liquid hydrogen system is recycled, the energy utilization rate is increased, and then the power and cruising ability of a vehicle are guaranteed.

The invention belongs to the technical field of metal composite materials and hydrogen storage and transportation materials, and particularly relates to a high-strength hydrogen-embrittlement-resistant layered metal composite material for hydrogen storage and a preparation method and application of the high-strength hydrogen-embrittlement-resistant layered metal composite material. According to the preparation method, the nickel-saving austenitic stainless steel (NEASS) and the 30CrMo steel are alternately overlapped in a multi-layer mode, and the processes of vacuum electron beam welding, high-temperature hot rolling, accumulative ply rolling, multi-stage heat treatment and the like are combined, so that the composite board with the layer number reaching hundreds of layers, firm interface bonding, excellent mechanical performance and good hydrogen embrittlement resistance is prepared; the technical problem that strength, toughness and hydrogen brittleness resistance of an existing metal material in a high-pressure hydrogen environment are difficult to consider at the same time is solved. The obtained composite material has high strength, high plasticity and excellent hydrogen embrittlement resistance, and is suitable for structural materials of high-pressure hydrogen storage tanks, hydrogen conveying pipelines and other key hydrogen energy equipment.

The invention discloses a non-metal composite hydrogen conveying hose with a multi-form hydrogen blocking layer. The non-metal composite hydrogen conveying hose comprises a non-metal inner pipe, a non-metal fiber reinforcement layer and a non-metal outer protection pipe which are sequentially arranged from inside to outside in a sleeving mode. The non-metal inner pipe sequentially comprises an organic hydrogen-resistant coating, a composite fiber lining pipe and a barrier layer from inside to outside; the non-metal fiber reinforced layer sequentially comprises a fiber pre-impregnated winding layer and a reinforcing rib layer from inside to outside; the non-metal inner pipe and the non-metal fiber reinforced layer are bonded with each other by adopting thermosetting polyurethane; the non-metal fiber reinforcement layer and the non-metal outer protection pipe are connected in a non-bonding mode. The non-metal composite hose has good hydrogen leakage prevention capacity and flexibility and can be used for high-pressure hydrogen conveying.

The invention relates to a solid oxide electrolytic cell hydrogen production system and an operation method thereof. The solid oxide electrolytic cell hydrogen production system comprises an SOEC galvanic pile module, a fan, an air electric heater, a steam superheater, a deionized water pump, a first preheater, a second preheater, a steam generator, a condenser, a high-pressure hydrogen cylinder, a high-pressure protective gas cylinder, a compressed air cylinder, a first electromagnetic valve and a second electromagnetic valve. Wherein the air electric heater is sequentially connected with the water vapor superheater and the SOEC stack module and can be used for heating air and water vapor at an inlet of the SOEC stack module. According to the embodiment of the invention, heating of air and water vapor at the inlet of the SOEC galvanic pile module is met by adopting the air electric heater, so that waste heat of mixed gas at the outlet of the SOEC galvanic pile module is utilized in a gradient manner, the electrolytic hydrogen production efficiency is effectively improved, meanwhile, the power consumption is effectively reduced, and the system is simple in design structure, convenient to realize low-cost manufacturing and suitable for popularization and application. And the high-efficiency and energy-saving electrolytic hydrogen production requirement can be met.

The invention discloses a hydrogen storage cylinder co-cured by a titanium alloy liner and fiber prepreg and a preparation method thereof, and the preparation method comprises the following steps: preparing a graphene modified PEEK water-based suspension; preparing a graphene modified carbon fiber / PEEK prepreg and a graphene modified glass fiber / PEEK prepreg by using the graphene modified PEEK water-based suspension liquid; the titanium alloy hydrogen storage cylinder inner container is machined and formed, the surface of the titanium alloy hydrogen storage cylinder inner container is anodized, and a uniform and compact titanium oxide film is formed; and sequentially winding the graphene modified carbon fiber / PEEK prepreg and the graphene modified glass fiber / PEEK prepreg on the outer side of the anodized titanium alloy hydrogen storage cylinder liner through a laser winding technology. The hydrogen storage cylinder prepared by the preparation method has the characteristics of high strength, good toughness, high temperature resistance, high flame retardance and the like, can provide long-term reliable safety guarantee in high-pressure hydrogen storage application, and is suitable for hydrogen storage requirements of electric / hydrogen energy hybrid aircrafts.

The invention discloses a high-pressure combustion combined heat and power generation energy storage system and method for hydrogen and oxygen production through electrolysis, and relates to the field of hydrogen energy storage. After the electrolytic cell produces high-pressure hydrogen and oxygen, the high-pressure hydrogen and oxygen are stored in the hydrogen / oxygen storage tank, the system can operate in a hydrogen / oxygen mode, and in the oxygen mode operation, the hydrogen and oxygen steam mixed gas from the oxygen storage tank and the hydrogen / oxygen evaporation compressor are combusted in the high-pressure combustion chamber to generate superheated steam, and then the superheated steam enters the expansion turbine to do work; due to excessive oxygen, dead steam after acting is separated into two working media through a gas-liquid separator, that is, gas enters a cooler to be cooled and then returns to a combustion chamber through a hydrogen / oxygen evaporation compressor, drainage water generated after liquid enters a heat supply heat exchanger is pressurized through a water pump and then enters a high-temperature combustion chamber, and therefore clean utilization of hydrogen energy and cyclic regeneration of the working media are achieved. The system can realize high power generation efficiency and excellent environmental protection performance, and is suitable for regions requiring stable consumption of fluctuating renewable energy sources, power and heat supply and the like.

The invention belongs to the technical field of ferrous metallurgy, and relates to high-grade hydrogen transmission pipeline steel and a preparation method thereof.The high-grade hydrogen transmission pipeline steel is prepared from, by mass, 0.02%-0.04% of C, 0.20%-0.30% of Si, 1.20%-1.30% of Mn, smaller than or equal to 0.010% of P, smaller than or equal to 0.0010% of S, 0.015%-0.055% of Alt, smaller than or equal to 0.0020% of N, smaller than or equal to 0.0010% of O, smaller than or equal to 0.0001% of H, 0.90%-1.00% of Cr, 0.40%-0.50% of Mo, 0.020%-0.030% of Ti, 0.05%-0.07% of Nb, 0.40%-0.50% of Ni and the balance iron and inevitable impurities; various performance indexes, especially hydrogen induced crack resistance indexes, of the composite material are outstanding, CSR is equal to 0, CLR is equal to 0, CTR is equal to 0, slow tensile IRA and IEL are smaller than or equal to 20% in a solution A, KIH of a stepped compact tensile sample is larger than or equal to 100 MPa.m < 1 / 2 > in a 6.3 MPa pure hydrogen environment, and the fatigue life is larger than or equal to 500,000 times; according to the method, the technical problems in the research and development process of the steel material for the hydrogen conveying pipeline are solved, the technical scheme is relatively simple and easy to implement, the obtained product is high in performance stability and controllable in cost, and popularization and application in long-distance, large-scale and safe conveying pipeline construction of high-pressure hydrogen are facilitated.

To provide an electrochemical hydrogen booster system in which a regenerated hydrogen gas can be utilized without being discharged to the outside as waste and the decline of a hydrogen production efficiency of the electrochemical hydrogen booster system can be suppressed.SOLUTION: An electrochemical hydrogen booster system 10 comprises: a hydrogen booster stack 16 for releasing a hydrogen gas supplied to an anode electrode as a highly pressured hydrogen gas boosted from a cathode electrode through a polymer electrolyte; a hydrogen supply apparatus 14 for supplying the hydrogen gas to the anode electrode of the hydrogen booster stack 16 through a hydrogen supply flow path 60; a PSA apparatus 22 including multiple adsorption towers 24 for dehumidifying the highly pressurized hydrogen gas released from the hydrogen booster stack 16; and a return flow path 94 for recycling a regenerated hydrogen gas utilized for the regeneration in the adsorption tower 24 into the hydrogen supply flow path 60 or the hydrogen supply apparatus 14.SELECTED DRAWING: Figure 1

The invention discloses a solid-gas coupling hydrogen storage system and a flow and pressure coordinated regulation and control method thereof. The system comprises a gaseous hydrogen storage tank, a solid hydrogen storage tank, a hydrogen coupling regulation and control device, a hydrogen buffer tank, a solid hydrogen storage thermal management system, a high-pressure proportional valve, a low-pressure proportional valve, a three-way valve and a hydrogen storage valve. The gaseous hydrogen storage tank is connected with the hydrogen coupling regulation and control device through a pipeline, and high-pressure hydrogen is conveyed to the high-pressure inlet end of the hydrogen coupling regulation and control device. The low-pressure inlet end of the hydrogen coupling regulation and control device is connected with the solid hydrogen storage tank through a pipeline, and the outlet end of the hydrogen coupling regulation and control device is connected with the hydrogen buffer tank through a pipeline; and the pipelines of the gaseous hydrogen storage tank and the solid hydrogen storage tank are simultaneously connected with the three-way valve. According to the system, efficient and safe hydrogen storage and supply are achieved through the synergistic effect of all the components, and reliable technical innovation and support are provided for hydrogen energy application.

The invention belongs to the technical field of solid waste resource utilization, and particularly relates to a production process for producing low-sulfur marine fuel oil through waste rubber tire hydro-liquefaction, which comprises the following steps: (1) mixing oil slurry, waste tire rubber powder and a catalyst to obtain a mixture, enabling the mixture to pass through a swelling preheater, and enabling the mixture and hydrogen to enter a slurry bed reactor for hydro-liquefaction, the liquefied intermediate product passes through a high-pressure separator, hydrogen obtained through separation enters a fixed bed hydrofining device, and obtained liquid enters a rectifying tower through a pressure reducing valve; (2) feeding a liquid product at the bottom of the rectifying tower and hydrogen into a fixed bed hydrofining device; and (3) carrying out gas-liquid separation on the fixed bed hydrofining product, wherein the liquid obtained by the gas-liquid separation is the low-sulfur marine fuel oil. According to the invention, waste tire rubber powder and slurry oil are used as raw materials, the liquefaction of waste rubber tires is realized in high-pressure hydrogen and high-temperature environments, and a fixed bed hydrofining device is combined to further reduce the content of sulfur atoms so as to produce the low-sulfur fuel oil for ships.

The invention relates to hydrogen transmission pipeline steel L245MH and a production method thereof, and belongs to the technical field of production of hot-rolled coil plates for transmission pipelines, and the hydrogen transmission pipeline steel L245MH comprises the following chemical components in percentage by mass: 0.035 to 0.055 percent of C, 0.05 to 0.20 percent of Si, 0.60 to 0.90 percent of Mn, less than or equal to 0.012 percent of P, less than or equal to 0.0010 percent of S, less than or equal to 0.0012 percent of O, 0.020 to 0.040 percent of Als, 0.010 to 0.025 percent of Nb, 0.005 to 0.020 percent of Ti, 0.10 to 0.25 percent of Cr, 0.0045 to 0.0090 percent of Ce, less than or equal to 0.0080 percent of N and the balance of Fe and inevitable impurities. By adopting the component design and combining a Ce alloying process under a vacuum condition and a carbide dispersion precipitation process under accelerated cooling, the obtained pipeline steel L245MH has good high-pressure hydrogen compatibility performance.

The invention discloses a high-pressure hydrogen valve with high sealing performance, and belongs to the technical field of high-pressure hydrogen valves. The high-pressure hydrogen valve with the high sealing performance comprises a connecting valve body, and an auxiliary flow guide plate is arranged and is overturned upwards, so that the pressure at the position of a sealing head is reduced; by arranging the structure of the inner adjusting cylinder, the pressure of the position of the communicating groove is shared, vibration caused by sudden change of the internal pressure is avoided, by arranging the structure of the buffer plate, the pressure of hydrogen impact is changed into elastic potential energy to be absorbed, and meanwhile in the process of pushing the damping push plate, the damping effect is improved. By arranging the structure of the indicating push rod, magnetic repulsive force can horizontally push the magnetic piece and the indicating push rod to move forwards, whether the internal pressure exceeds the safety range or not can be observed according to the moving distance of the indicating push rod, and maintenance is convenient.

The invention belongs to the technical field of metal material and coating performance detection, and particularly relates to a high-pressure hydrogen permeation testing device and method.The testing device comprises a gas phase system and an electrochemical testing system, and the gas phase system comprises a high-pressure kettle, a hydrogen cylinder, a nitrogen cylinder and a vacuum treatment device; the autoclave is sealed and communicated with the hydrogen cylinder, the nitrogen cylinder and the vacuum treatment device; a first test port is formed in the upper part of the autoclave; the electrochemical testing system comprises an electrochemical workstation and an electrolytic tank; the electrolytic tank is connected to the upper part of the autoclave; the electrolytic tank is provided with a reference electrode and an auxiliary electrode, the lower part of the electrolytic tank is provided with a second test port, and the first test port and the second test port are connected with closed rubber rings and jointly clamp a sample to be tested through the closed rubber rings; the electrochemical workstation is electrically connected with the auxiliary electrode, the reference electrode and the to-be-tested sample, so that the service condition of the to-be-tested sample can be accurately simulated, the hydrogen permeation process in the actual working condition can be more truly reflected, and the accuracy of a hydrogen permeation test experiment is improved.

The invention discloses a nested high-pressure hydrogen pressure reduction and relief integrated device and a use method, and relates to the technical field of high-pressure gas pressure reduction and relief, the nested high-pressure hydrogen pressure reduction and relief integrated device comprises a valve shell, a gland, a valve body, a porous hedging throttling element and a gas outlet pressure control element, the top of the first hedging channel and the top of the second hedging channel are oppositely arranged, so that hydrogen flowing out of the first hedging channel and hydrogen flowing out of the second hedging channel form gas hedging to depressurize high-pressure hydrogen and reduce the flow rate and kinetic energy of the hydrogen; when the pressure of hydrogen entering the communicating cavity is smaller than the designed pressure, the gas outlet pressure control piece enables the valve body to abut against the top of the valve shell so as to close the pressure relief openings, and when the pressure of hydrogen entering the communicating cavity is larger than the designed pressure, the gas outlet pressure control piece enables the valve body to abut against the top of the valve shell so as to close the pressure relief openings. The valve body slides downwards and slides to the position where the pressure relief opening is opened so that part of hydrogen can flow out of the pressure relief opening to relieve the air pressure of the communicating cavity, the structure is simple, the space utilization rate is effectively increased, and cost is effectively reduced.

The invention discloses a high-pressure hydrogen pressure reducing valve with a spiral flow channel structure. The high-pressure hydrogen pressure reducing valve comprises a valve body, a sealing end cover, a needle-shaped valve element and an inlet end cover. A through cavity is formed in the center of the valve body in the axial direction. The sealing end cover, the needle-shaped valve element and the inlet end cover are sequentially and coaxially assembled and connected into the cavity of the valve body from top to bottom. A gas outlet channel is arranged on the side wall of the valve body and located between the sealing end cover and the needle-shaped valve element, a gas inlet channel is arranged at the bottom of the inlet end cover, and gas enters from the gas inlet channel and is exhausted through the gas outlet channel. The needle valve has the advantages of being simple in structure and long in service life, and the two spiral flow channel notches are evenly distributed in the outer surface of the needle valve element; due to the design of the spiral flow channel, the hydrodynamic performance is effectively improved, the reliability of the system is enhanced, and meanwhile the energy utilization rate and the impact resistance are improved; in addition, the pressure of hydrogen at the outlet of the valve body can be effectively controlled through the design of the adjusting channel, and the pressure is still kept relatively stable under extreme conditions.

According to the gas-liquid mixing hydrogen refueling station system with the cooling capacity recovery and gradient utilization functions, flash steam of the low-temperature liquid hydrogen storage tank is collected and stored in the low-temperature hydrogen storage tank, the cooling capacity of the flash steam is fully utilized, cooling capacity is provided for the heat exchanger, high-pressure hydrogen is cooled, the cooling capacity of the low-temperature flash steam of the liquid hydrogen is fully utilized, and the cooling capacity of the low-temperature flash steam of the liquid hydrogen is fully utilized. Energy gradient utilization of cooling capacity is achieved, and loss of extra energy in the hydrogen refueling station is reduced; the flash steam obtained after heat exchange is further used for hydrogen compression, and reutilization of the low-temperature liquid hydrogen flash steam is achieved; the flash steam after heat exchange is pressurized and then cooled by using the cooling capacity of the high-pressure liquid hydrogen, and meanwhile, the heating gasification of the high-pressure liquid hydrogen is realized, namely the gasification of the pressurized liquid hydrogen in the liquid hydrogen refueling station and the cooling of a gas hydrogen pressurization process in the liquid hydrogen refueling station are coupled for heat exchange, so that the utilization efficiency of the heat and the cooling capacity is greatly improved; an external vaporizer is not needed for high-pressure liquid hydrogen gasification, an external cooler is not needed in the gas-hydrogen pressurization process, and energy consumption is greatly reduced.

The invention relates to a high-pressure hydrogen nano-pore permeability testing device and method based on double-chamber pressure balance, and belongs to the technical field of unconventional oil gas. The device comprises a high-pressure gas source, a pressurization module, a double-layer nested core reaction kettle module and a high-frequency data acquisition and safety monitoring module; by constructing a double-layer nested structure that inner cavity hydrogen is actively wrapped by outer cavity nitrogen and cooperating with an all-metal knife edge hard sealing device and a different flow pattern permeability calculation method, accurate measurement of the Ndarcy grade permeability of the compact cover rock is successfully achieved, the industrial pain point that a traditional device is inaccurate in measurement, unstable in measurement and unsafe is thoroughly solved, and the method is suitable for large-scale popularization and application. And key experimental technology guarantee and scientific data support are provided for closure evaluation of underground hydrogen storage engineering and exploration and development of natural hydrogen resources.

The hydrogen transmission pipeline steel comprises the following chemical components in percentage by mass: 0.020%-0.045% of C, 0.11%-0.19% of Si, 1.45%-1.65% of Mn, less than or equal to 0.0010% of S, less than or equal to 0.008% of P, 0.015%-0.045% of Al, 0.040%-0.060% of Nb, 0.020%-0.035% of Ti, 0.30%-0.50% of Cr, 0.0040%-0.0080% of RE, less than or equal to 0.004% of N, less than or equal to 0.0015% of O, less than or equal to 0.0001% of H and the balance of Fe and other inevitable impurities, the conditions that the carbon equivalent Ceq = C + Mn / 6 + (Cr) / 5 is less than or equal to 0.35%, the Nb / Ti = the rare earth element is selected from at least one of lanthanum, cerium and neodymium. The invention aims to solve the technical problems that the existing hydrogen transmission pipeline steel is easy to generate hydrogen embrittlement, short in fatigue life and high in production cost in a high-pressure hydrogen environment, and meets the core requirements of hydrogen energy long-distance transmission pipeline engineering on high strength, high hydrogen embrittlement resistance, high fatigue performance and low cost of materials.

The invention discloses a hydrogen deep hypothermia three-loop refrigeration device and method, and relates to the technical field of hydrogen liquefaction. The device comprises a raw material hydrogen supply system, an ortho-parahydrogen conversion system, a three-loop hydrogen refrigerating system, a liquid hydrogen collecting and supercooling system and a gas recycling system. Wherein the raw material hydrogen is sequentially cooled by the pre-cooling cold box and the multi-stage heat exchanger and then enters the ortho-parahydrogen converter to be converted into parahydrogen, and then the parahydrogen is subjected to flash separation to obtain a liquid hydrogen product. The three-loop refrigerating system adopts three modes of high-pressure hydrogen expansion, medium-pressure liquid hydrogen throttling and low-pressure flash steam recovery to supply cold synergistically, and precise matching of the cold capacity of different temperature zones is achieved. Hydrogen is adopted as a refrigerant, the refrigerant cost is low, the heat exchange temperature difference is reduced through three-loop collaborative refrigeration, the flash evaporation loss is reduced, meanwhile, the system stability and the liquid hydrogen quality are improved through expansion work recovery and full parahydrogen conversion, and the system is suitable for large-scale liquid hydrogen preparation.

The invention relates to the technical field of hydrogen energy safety experiments, in particular to a PIV (particle image velocimetry)-based high-pressure hydrogen jet flow and hydrogen-present component coupling visualization system and a PIV-based high-pressure hydrogen jet flow and hydrogen-present component coupling visualization method. The system comprises a hydrogen source, a nitrogen source, a tracer particle containing box, a hydrogen storage tank, a pinhole nozzle, a hydrogen-contacting component, a data acquisition assembly and a processing platform, the hydrogen source and the nitrogen source are communicated with the tracer particle containing box through valves, the hydrogen storage tank is communicated with the tracer particle containing box and the pinhole nozzle, the hydrogen-contacting component directly faces the pinhole nozzle, and the data acquisition assembly is connected with the data acquisition assembly. The pinhole nozzle and the hydrogen-contacting component are both positioned in the experiment module; the data acquisition assembly comprises a foil type resistance strain gauge which is pasted on the side, away from the pinhole nozzle, of the hydrogen-contacting component and a high-speed camera array which is used for shooting movement of tracer particles carried by high-pressure hydrogen jet sprayed from the pinhole nozzle to the hydrogen-contacting component from a plurality of visual angles. According to the invention, the PIV technology is utilized to capture the fluid-structure interaction process between the high-pressure hydrogen jet flow and the hydrogen-contacting component, so that the visual research of the fluid-structure interaction process is realized.

The utility model provides a water storage and supply device for an underwater fuel cell system. The water storage and supply device sequentially comprises a high-pressure hydrogen cylinder, a built-in rubber capsule and a shell from inside to outside, the tail end of the high-pressure hydrogen cylinder is sleeved with a round sleeve with a cap, and the head end of the high-pressure hydrogen cylinder is fixedly connected with an air inlet and outlet metal nozzle. The inner side of the tail end of the built-in rubber capsule is in wedge connection with the capped round sleeve, the outer side of the tail end of the built-in rubber capsule abuts against the shell, and the capped round sleeve is fixedly connected with the shell; the inner side of the head end of the built-in rubber bag is in wedge connection with the air inlet and outlet metal nozzle, the outer side of the head end of the built-in rubber bag abuts against the shell, and the metal nozzle locking piece is fixedly connected with the air inlet and outlet metal nozzle and abuts against the shell. A variable gas storage cavity is formed between the built-in rubber bag and the high-pressure hydrogen cylinder, a variable water storage cavity is formed between the shell and the built-in rubber bag, a water outlet is formed in the shell, a low-pressure gas flow channel in the gas inlet and outlet metal nozzle is communicated with the variable gas storage cavity, and a high-pressure gas flow channel in the gas inlet and outlet metal nozzle is communicated with an inner cavity of the high-pressure hydrogen cylinder.

The invention discloses a large-duration double-source combined supply emergency security vehicle and a control method thereof.The emergency security vehicle comprises a photovoltaic system, a lithium battery system, a hydrogen production system and a hydrogen storage system, the photovoltaic system is connected with the lithium battery system and the hydrogen production system, and the hydrogen production system is connected with the hydrogen storage system; the lithium battery system comprises a fuel cell and a power lithium battery, and the fuel cell is electrically connected with the power lithium battery; the hydrogen production system comprises a PEM electrolytic bath; the hydrogen storage system comprises a modularized hydrogen cylinder group, the power lithium battery is connected with the PEM electrolytic bath through a DC / DC converter, and the PEM electrolytic bath is connected with the modularized hydrogen cylinder group through a high-pressure hydrogen pipeline; the external hydrogen charging interface is communicated with the modularized hydrogen cylinder group, and the modularized hydrogen cylinder group is communicated with a hydrogen inlet of the fuel cell; the method has the advantages that the power and the cruising ability are improved.

The invention aims to disclose a magnesium hydride large-scale production device and production process, and relates to the technical field of magnesium hydride preparation, the magnesium hydride large-scale production device comprises a magnesium powder buffer tank, a high-temperature and high-pressure hydrogenation reactor, a magnesium hydride buffer tank and a finished product tank; a feeding pipe is arranged between the magnesium powder buffer tank and the high-temperature and high-pressure hydrogenation reactor, and the feeding pipe is provided with a first valve; a double-helix stirring shaft is arranged in the high-temperature and high-pressure hydrogenation reactor, and a second valve is arranged on the discharging pipe; a spiral drill bit is arranged at the bottom of the double-spiral stirring shaft, extends into the discharging pipe and is close to the second valve; the high-temperature and high-pressure hydrogenation reactor is provided with a high-pressure hydrogen inlet, and a plurality of temperature sensors are arranged on the inner wall of the high-temperature and high-pressure hydrogenation reactor. The high-temperature and high-pressure hydrogenation reactor has the technical effects that high-pressure hydrogen is introduced under the condition that the first valve and the second valve are closed, and magnesium hydride is generated in the process that the double-helix stirring shaft rotates reversely to stir magnesium powder; and the second valve is opened, and the double-helix stirring shaft rotates forwards and drives the magnesium hydride powder to fall into the magnesium hydride buffer tank from the discharging pipe.

The utility model discloses a hydrogen fuel cell automobile high-pressure hydrogen storage tank pressure energy recovery device which comprises a first-stage hydrogen pressure reduction module, a second-stage hydrogen pressure reduction module, a third-stage hydrogen pressure reduction module and an electric energy storage module which are sequentially connected. The third-stage hydrogen pressure reduction module is communicated with the hydrogen output pipeline; a first hydrogen pressure regulation transmission pipeline is also communicated between the primary hydrogen pressure reduction module and the hydrogen output pipeline; the second-stage hydrogen pressure reduction module is communicated with the hydrogen output pipeline through a second hydrogen pressure regulation transmission pipeline; through the cooperation of the multi-stage hydrogen pressure reduction module and the electric energy storage module, the pressure energy of high-pressure hydrogen in the high-pressure hydrogen storage tank is converted into electrochemical energy to the maximum extent, and the electrochemical energy is stored in the storage battery, so that the waste of the pressure energy in the high-pressure hydrogen storage tank is avoided, and the energy utilization efficiency of the fuel cell automobile is improved; and the comprehensive energy consumption of the automobile is reduced.

The invention discloses a metal material hydrogen compatibility simulation test method based on hydrogen content. The method comprises the following steps: S1, sample preparation; s2, charging hydrogen in a high-pressure hydrogen environment; s3, diffusible hydrogen is measured; s4, preparing an electrochemical hydrogen charging solution; s5, carrying out hydrogen charging by using an electrochemical hydrogen charging solution; s6, storing the sample; s7, drawing a hydrogen concentration change curve; s8, electrogalvanizing process parameters are set; s9, performing hydrogen charging in a simulated high-pressure hydrogen environment; s10, the sample is galvanized; s11, carrying out a slow tensile test and a fracture toughness test on the sample; and S12, evaluating the high-pressure hydrogen embrittlement of the sample based on the results of the slow tensile test and the fracture toughness test. According to the method, the hydrogen embrittlement performance of the material under different hydrogen pressure environments can be obtained, and the influence of the influence factors on the high-pressure hydrogen embrittlement performance of the steel can be analyzed in combination with the process, alloy components and stress states of the steel.

The invention relates to a novel frame for a PEM electrolysis cell and for a PEM electrolysis cell stack. The subject matter of the invention is the frame, a PEM electrolysis cell and stack-type PEM electrolysis devices, which comprise the frame according to the invention, preassembled components and methods for producing preassembled components and stack-type PEM electrolysis devices. The frame, PEM electrolysis cell and stack-type PEM electrolysis devices according to the invention are suitable for generating high-pressure hydrogen in combination with the use of thin proton exchange membranes. The invention is based on a novel frame- and sealing-concept. The invention also relates to a cover for stack-type PEM electrolysis devices.

The invention discloses a high-pressure sealing ball valve for hydrogen, and relates to the technical field of ball valves, the high-pressure sealing ball valve comprises a first valve body and a second valve body, the first valve body and the second valve body are detachably and fixedly connected, and a sealing ring is arranged at the joint of the first valve body and the second valve body; the second valve body fixedly communicates with a valve seat, a valve rod is rotationally arranged in the valve seat, and a valve opening and closing mechanism is jointly installed between the first valve body and the second valve body. The valve has the advantages that pressure self-adaptive adjustment and dynamic adaptation to working condition fluctuation are achieved through opening, closing and sealing actions, excessive abrasion of components is avoided while sealing reliability is guaranteed, the instantaneous leakage risk of a traditional valve in the opening and closing stage is reduced, meanwhile, impact damage and operation resistance of the components are remarkably reduced by means of multiple buffering structures and friction optimization, and the service life of the valve is prolonged. The operation and maintenance convenience of equipment is improved, the service life is effectively prolonged, and the harsh working condition requirement of high-pressure hydrogen conveying is met.

The utility model relates to the technical field of coal chemical industry, in particular to a device for simulating scaling stability in a coal-oil slurry transportation process. Comprising a coal-oil slurry stirring tank connected with a high-pressure hydrogen pipe, the coal-oil slurry stirring tank is connected with one end of a simulation conveying pipe through a feeding pipe, the other end of the simulation conveying pipe is connected with a coal-oil slurry buffer tank through a discharging pipe, the coal-oil slurry buffer tank is connected with the coal-oil slurry stirring tank through a circulating pipe, and a coal-oil slurry circulating pump is arranged on the circulating pipe; an oil-coal-slurry conveying pump is arranged on the feeding pipe, the feeding pipe is connected with a plurality of feeding branch pipes, each feeding branch pipe is provided with a branch pipe valve and a branch pipe flowmeter, the discharging pipe is connected with a plurality of discharging branch pipes, and the two ends of a plurality of simulation conveying pipes with different inner diameters are connected with the feeding pipe and the discharging pipe through the feeding branch pipes and the discharging branch pipes respectively. A plurality of pressure gauges are arranged on the simulation conveying pipe at intervals, and a heat tracing sleeve is arranged outside the simulation conveying pipe. The device is reasonable in structural arrangement, and is favorable for mastering the scaling risk of the coal-oil slurry in advance in the production process so as to carry out response treatment in time.

The invention discloses a treatment process method for improving the strength and plasticity of a hydrogen isolation diaphragm and the hydrogen isolation diaphragm. The treatment process method comprises the following steps: S1, carrying out high-frequency vibration and static pressure coupling treatment on the hydrogen isolation diaphragm; and S2, the hydrogen isolation diaphragm is subjected to snakelike line rolling treatment. The hydrogen isolation diaphragm is treated by the treatment process method. According to the treatment process method, high-frequency vibration and static pressure coupling treatment is carried out on the hydrogen isolation diaphragm, and a gradient nanostructure and residual compressive stress are introduced into the surface layer of the hydrogen isolation diaphragm, so that the strength and plasticity of the hydrogen isolation diaphragm are remarkably improved, and the hydrogen embrittlement sensitivity is reduced; therefore, the service life of the hydrogen isolation diaphragm in the high-pressure hydrogen diaphragm compressor is prolonged, and the safety and reliability of equipment are improved.