68results about "Hydrogen technologies" patented technology

The invention relates to a system for storing liquid hydrogen and for distributing gaseous hydrogen, comprising a source of liquid hydrogen (20), at least two gaseous hydrogen tanks (31-35) to be filled and a transfer device comprising: a transfer unit (25) configured to transfer liquid hydrogen from the hydrogen source (20) to any of the tanks, a vapour compressor (10) having a first upstream end and a second downstream end fluidly connected to each of the tanks, a set of valves (51-55), a control device configured to issue a command to transfer the liquid hydrogen and to open and / or close one or more valves (51-55), the compressor (10) being arranged so as to transfer vapours created during filling from any tank to each of the other tanks in succession, by compressing the vapors to a pressure greater than the pressure in the tank during filling.

A hydrogen gas supply apparatus according to one aspect of the present invention includes a compressor configured to compress hydrogen gas and supply the hydrogen gas compressed to a pressure accumulator which accumulates the hydrogen gas, an adsorption column disposed between the discharge port of the compressor and the pressure accumulator, and configured to include an adsorbent for adsorbing impurities in the hydrogen gas discharged from the compressor, and a plurality of valves disposed at the gas inlet / outlet port side of the adsorption column, being at a discharge port side of the compressor, and configured to be able to seal the adsorption column, wherein the space in the adsorption column is sealed using the plurality of valves such that the inside of the adsorption column is maintained to have a high pressure by the hydrogen gas compressed in the case where the compressor is stopped.

The invention relates to the technical field of automatic control, and discloses a multi-storage-tank hydrogen storage and delivery system and a control method thereof, and the multi-storage-tank hydrogen storage and delivery system comprises a control module; the hydrogen conveying module comprises a hydrogen conveying pipe, a hydrogen production device flow meter and a compression assembly, the hydrogen conveying pipe is connected with the compression assembly, the hydrogen production device flow meter is arranged on the hydrogen conveying pipe, and the hydrogen conveying pipe is provided with an inlet pressure sensor and an outlet pressure sensor; the hydrogen storage module comprises a hydrogen input pipe, a storage tank main pipe and a plurality of hydrogen storage tanks, the hydrogen input pipe is connected with the hydrogen conveying pipe, the hydrogen input pipe is provided with an inlet adjusting valve, the storage tank main pipe is connected with the hydrogen conveying pipe, the hydrogen storage tanks are connected with the storage tank main pipe through storage tank sub-pipes, and the storage tank main pipe is provided with an outlet adjusting valve and a hydrogen storage output pressure sensor. The buffer capacity, the operation efficiency and the safety of the multi-storage-tank system are improved, full-automatic balance control between hydrogen production and hydrogen utilization is achieved, pressure fluctuation and energy consumption are effectively reduced, and stable hydrogen supply of the system is guaranteed.

The present invention relates to the technical field of natural gas hydrogen doping, and discloses a natural gas hydrogen doping-based hydrogenation apparatus, which comprises: a hydrogen tank for storing hydrogen, one end of a connection pipe of the hydrogen tank is provided with a pressure reducing valve through a flange, and one end of the pressure reducing valve far away from the connection pipe is provided with a conveying pipe through a flange; the turbulent flow mechanism is used for optimizing the flow characteristic in the hydrogen conveying process; the hydrogen accelerating mechanism is used for accelerating the hydrogen flow rate; the nitrogen mechanism is used for providing a nitrogen barrier for the conveying pipe; the pressure relief mechanism is used for automatically releasing nitrogen when the nitrogen mechanism is too high; the hydrogen accelerating mechanism comprises a fixing ring, and the fixing ring is fixedly connected to the end, away from the connecting pipe, of the interior of the conveying pipe. The flow characteristic of hydrogen is optimized through the turbulent flow mechanism, the flow speed is increased through the hydrogen acceleration mechanism, the nitrogen mechanism forms an isolation barrier, automatic pressure relief is achieved through the pressure relief mechanism, and the hydrogen mixing efficiency and the conveying safety are overall improved.

The utility model relates to the technical field of natural gas conveying, in particular to a safety detection device for a hydrogen-mixed natural gas conveying pipeline. The safety detection device for the hydrogen-mixed natural gas conveying pipeline comprises a base plate and locking universal wheels fixedly installed at the four corners of the bottom end of the base plate, and a handle is fixedly installed on one side of the base plate; the two supporting rods are symmetrically installed on the base plate, a lifting seat is installed on the two supporting rods in a sliding mode, a supporting shaft is rotatably installed in a groove of the lifting seat, an overturning seat is fixedly installed on the supporting shaft, a detection assembly for detecting pipeline leakage is installed on the overturning seat, and the detection assembly comprises a sliding seat; the sliding seat is fixedly installed at one end of the overturning seat, a bidirectional threaded rod is rotatably installed on the sliding seat, sliding arms are symmetrically installed on the bidirectional threaded rod in a threaded mode, the sliding arms are in sliding fit with the sliding seat, and detection cylinders are fixedly installed at the ends, away from the bidirectional threaded rod, of the sliding arms. The device provided by the utility model has the advantages of simple structure and flexibility in detection and use.

A multi-layer structure for transporting, distributing and storing hydrogen, comprising, from the inside to the outside, at least one sealing layer (1) and at least one composite reinforcing layer (2), the innermost composite reinforcing layer being wrapped around the outermost one adjacent to the sealing layer (1), the sealing layer comprising primarily at least one semi-crystalline long-chain polyamide thermoplastic polymer P1i (i=1 to n, n being the number of sealing layers), the Tf of which is in accordance with ISO 14049. 11357-3:2013, above 160°C, and comprising, excluding one polyether block amide (PEBA), up to 50% by weight of an impact modifier, based on the total weight of the composition, and up to 1.5% by weight of a plasticizer, based on the total weight of the composition, wherein the composition does not comprise a nucleating agent, and the at least one polyamide thermoplastic polymer of each sealing layer may be the same or different, and at least one of the composite reinforcing layers consists mainly of a fibrous material in the form of continuous fibers impregnated with a composition comprising at least one polymer P2j (j = 1 to m, where m is the number of reinforcing layers), in particular an epoxy resin or an epoxy-based resin, and the structure does not include an outermost layer adjacent to the outermost polyamide polymer composite reinforcing layer.

The application discloses a hydrogen production and hydrogenation integrated station control method, which comprises hydrogen production equipment, a hydrogen buffer tank, a first-stage compressor, a first-stage hydrogen storage tank, a second-stage compressor, a second-stage hydrogen storage tank and hydrogenation equipment which are sequentially connected; during hydrogenation, the hydrogen production equipment, the first-stage compressor, the second-stage compressor and the hydrogenation equipment are controlled to work according to the relationship between the pressures of the hydrogen buffer tank, the first-stage hydrogen storage tank, the second-stage hydrogen storage tank and the hydrogenation equipment when the hydrogenation equipment works and the maximum filling pressure allowed for the hydrogenation equipment, the first preset pressure, the second preset pressure, the maximum allowable working pressure of the second-stage hydrogen storage tank, the fourth preset pressure, the minimum inlet air pressure of the first-stage compressor, the maximum allowable working pressure of the first-stage hydrogen storage tank, the third preset pressure, the maximum allowable working pressure of the hydrogen buffer tank and the minimum inlet air pressure of the second-stage compressor. The application realizes on-demand start and stop of hydrogen production, reduces loss, prolongs the service life of equipment, reduces cost and production hidden danger.

The present invention relates to a multilayer structure for transporting, distributing and storing hydrogen, in particular for storing hydrogen, comprising, from the inside to the outside, a sealing layer (1) and at least one composite reinforcing layer (2), said sealing layer comprising, from the inside to the outside, a layer (a) of a composition comprising mainly short-chain polyamide thermoplastic polymers, more than 15% and up to 50% by weight of an impact modifier, or mainly semi-crystalline long-chain polyamide thermoplastic polymers, up to 50% by weight of an impact modifier, relative to the total weight of the composition, and up to 3% by weight of a plasticizer, optionally a layer of a binder, in particular a fluoropolymer, in particular PVDF. or a hydrogen barrier layer made of EVOH, optionally a layer of a binder, and a layer (b) consisting of a composition comprising mainly a short-chain polyamide thermoplastic polymer and more than 15% and up to 50% by weight of an impact modifier, or mainly a semi-crystalline long-chain polyamide thermoplastic polymer, up to 50% by weight of an impact modifier, and up to 3% by weight of a plasticizer, wherein the innermost composite reinforcing layer (2) is wound around the sealing layer (1), and at least one of the composite reinforcing layers consists of a fibrous material in the form of continuous fibers impregnated with a composition comprising mainly at least one polymer P1j, where j = 1 to m, and m is the number of reinforcing layers.

The present invention provides a multilayer structure intended for transporting, distributing, or storing hydrogen. [Solution] A multilayer structure comprising at least one sealing layer (1) and at least one composite reinforcing layer (2) from the inside out, wherein the innermost composite reinforcing layer is wound around the outermost layer adjacent to the sealing layer, the sealing layer mainly comprises at least one semicrystalline long-chain polyamide thermoplastic polymer P1i (i=1 to n, where n is the number of sealing layers), its Tm is greater than 160°C, and except for one polyether block amide (PEBA), it contains up to 50% by weight of an impact resistance modifier and up to 1.5% by weight of a plasticizer based on the total weight of the composition, and does not contain a nucleating agent, and at least one of the composite reinforcing layers is made of a fibrous material in the form of continuous fibers impregnated with a composition mainly comprising at least one polymer P2j (j=1 to m, where m is the number of reinforcing layers), epoxy resin or epoxy-based resin.

Provided is a steel pipe or tube for hydrogen gas that has both excellent hydrogen embrittlement resistance and high productivity and can be used very suitably as parts of pressure vessels for hydrogen gas. The steel pipe or tube for hydrogen gas having a finish-polished inner surface, in which the inclination angle of a polishing trace present on the inner surface with respect to a circumferential direction of the steel pipe or tube for hydrogen gas is 0° to 30°.

A safety protection device for a hydrogen liquefaction system, belonging to the field of hydrogen liquefaction technology, includes components such as a liquid hydrogen storage tank (1), a liquid hydrogen discharge outlet pipe (2), a special quick connector (3), a non-conforming liquid hydrogen shut-off valve (4), a non-conforming liquid hydrogen pipeline (5), a first emergency vaporizer front-end shut-off valve (6), a second emergency vaporizer front-end shut-off valve (7), a first emergency vaporizer (8), a second emergency vaporizer (9), a first emergency vaporizer rear-end shut-off valve (10), a second emergency vaporizer rear-end shut-off valve (11), an emergency vaporizer outlet pipe (12), an emergency heater (13), an emergency heater outlet pipe (14), and a flare system (15). Its advantages are that it can ensure the safe and stable operation of the hydrogen liquefaction system, collecting and vaporizing the non-conforming liquid hydrogen components and the gas-liquid mixture released from the overpressure of the liquid hydrogen storage tank for combustion; and ensuring that in the event of an accident, a large amount of liquid hydrogen can be rapidly vaporized and sent to the flare system for safe combustion and discharge.

The present invention discloses a device for merging gas during the single-tank start-up of ion-exchange membrane caustic soda production, which includes a cathode water seal cylinder body, an anode water seal cylinder body, a water seal connecting pipe, and a nitrogen gas inlet main pipe; the cathode water seal cylinder body includes a water seal water inlet pipe, a cathode water seal gas inlet pipe, and a cathode water seal exhaust pipe; the anode water seal cylinder body includes an anode water seal gas inlet pipe, an anode water seal exhaust pipe, a water seal overflow pipe, and a water seal drain pipe; one end of the nitrogen gas inlet main pipe is communicated with a nitrogen gas supply pipeline, and the other end is respectively communicated with the cathode water seal gas inlet pipe and the anode water seal gas inlet pipe through nitrogen gas inlet water seal pipes. Its advantages are as follows: (1) The device has a simple structure and low operation difficulty, and the gas merging can be completed without the cooperation of personnel; (2) The pressure is stable and steady during the operation process, solving the problem of operation pressure fluctuation caused by improper cooperation during the start-up and gas merging of the electrolytic cell, and prolonging the service life of the ion-exchange membrane; (3) It is convenient to realize the automatic control of gas merging.

The utility model provides a small conveying mechanism for carrying hydrogen energy pipeline pup joints, which relates to the technical field of pipeline carrying and conveying and comprises a small conveying assembly, an assembly and disassembly assembly is arranged on the small conveying assembly, a supporting assembly is arranged at the top of the small conveying assembly, and a displacement assembly is arranged at the bottom of the small conveying assembly. And the small conveying assembly comprises a base and a placing seat. The movable column moves in the supporting column, so that the height of the bearing seat is adjusted, the bearing seat is made to be matched with the height of a pipeline, the limiting pin penetrates through the supporting column and the movable column, limiting is provided, then the adjusting screw rod is manually rotated, the movable block is pushed to move in the sliding rail, and the pipeline can be conveniently adjusted. The bearing seat is promoted to support the middle part of the hydrogen energy pipeline, so that the weight load of the short section of the pipeline is uniformly dispersed, the middle area of the pipeline is prevented from being suspended, the stability of the pipeline during conveying is improved, and the normal use of the pipeline is ensured.

A catalyst used for dehydrogenation of an organic hydrogen-storage material to generate hydrogen, a support for the catalyst, and a preparation process thereof are presented. A hydrogen-storage alloy and a preparation process thereof are provided. A process for providing high-purity hydrogen, a high-efficiently distributed process for producing high-purity and high-pressure hydrogen, a system for providing high-purity and high-pressure hydrogen, a mobile hydrogen supply system, and a distributed hydrogen supply apparatus are also described.

A lightweight reduced pressure hydrogen supply device suitable for a hydrogen energy handheld torch includes a cylinder mouth valve (3), a pressure reducing valve (4), an opening / closing assembly (5), an opening / closing execution member, and a gas cylinder cap (8). The pressure reducing valve (4) has three connection ports: a lower connection port (4-1) connected to the gas cylinder cap (8), an upper connection port (4-2) connected to the burner (2), and a side connection port (4-3) for mounting the opening / closing assembly (5). The opening / closing execution member and the cylinder mouth valve (3) are attached inside the gas cylinder cap (8). The opening / closing assembly (5) controls the opening / closing execution member to realize the opening and closing of the cylinder mouth valve (3). The cylinder mouth valve (3) is connected to the cylinder mouth of the gas cylinder (1) and is used to open and close the gas cylinder. This lightweight reduced pressure hydrogen supply device is used to open and close gas cylinders, reduce pressure of high pressure hydrogen, and seal hydrogen by connecting the gas cylinder and burner in series in a hydrogen energy handheld torch combustion system. It solves problems such as large pressure reduction ratio pressure reduction, highly reliable sealing, and low opening and closing torque, and has advantages such as a wide temperature range, small size, and light weight.

The present invention relates to a multi-layer structure for transporting, distributing and storing hydrogen, comprising, from the inside to the outside, a sealing layer (1) and at least one composite reinforcing layer (2), the innermost composite reinforcing layer being wrapped around the sealing layer (1), the sealing layer consisting essentially of a composition comprising a polyamide thermoplastic polymer PA11, up to 15% by weight of an impact modifier relative to the total weight of the composition, in particular up to 12% by weight of an impact modifier, and up to 1.5% by weight of a plasticizer relative to the total weight of the composition, the composition being devoid of nucleating agents and polyether block amide (PEBA), at least one of the composite reinforcing layers consisting of a fibrous material in the form of continuous fibers impregnated with at least one polymer P2j, where j=1 to m, m being the number of reinforcing layers, in particular a composition comprising mainly an epoxy or epoxide-based resin, the structure being devoid of an outermost layer, adjacent to the outermost composite reinforcing layer being made of a polyamide polymer.

This invention discloses a method for low-pressure storage and mixing of hydrogen, relating to the field of hydrogen energy utilization technology. The invention designs a novel low-pressure hydrogen storage tank with an internal piston chamber structure. The piston moves vertically along the inner wall of the tank. Below the piston is the hydrogen storage chamber, with an inlet and outlet pipe connected to its lower outer end. A counterweight is placed above the piston depending on the operating condition. Hydrogen is produced using an atmospheric pressure hydrogen production device. The produced hydrogen is separated, purified, and connected to the inlet pipe of the hydrogen storage chamber. The outlet pipe of the hydrogen storage chamber is divided into two lines, connecting to a medium-pressure mixing pipeline and a low-pressure mixing pipeline respectively. A compressor is connected to the medium-pressure mixing pipeline, and its outlet is connected to the inlet of the medium-pressure mixing pipeline. The outlet of the low-pressure mixing pipeline is connected to the inlet of the low-pressure mixing pipeline. This invention eliminates the need for constructing a dedicated hydrogen delivery pipeline, resulting in low cost and good safety.

The utility model relates to the technical field of liquid hydrogen storage, in particular to an internal heat exchange system of a skid-mounted liquid hydrogen refueling station. The top of the liquid hydrogen storage tank is connected with the buffer tank through a pipeline, the buffer tank is connected with a gas inlet of the hydrogen booster pump through a pipeline, a gas outlet of the hydrogen booster pump is connected with the first-stage hydrogen cooler through a pipeline, and the first-stage hydrogen cooler is connected with the high-pressure buffer tank through a pipeline. The high-pressure buffer tank is connected with a secondary hydrogen cooler through a pipeline; the bottom of the liquid hydrogen storage tank is connected with the liquid hydrogen bottle through a pipeline, a liquid outlet of the liquid hydrogen booster pump is connected with an inlet of the heat exchange and cold supply assembly through a pipeline, and an outlet of the heat exchange and cold supply assembly is connected with the high-pressure buffer tank through a pipeline. The first-stage hydrogen cooler and the second-stage hydrogen cooler provide heat sources for the heat exchange and cold supply assembly to enable liquid hydrogen to be gasified, and the heat exchange and cold supply assembly provides cold sources for the first-stage hydrogen cooler and the second-stage hydrogen cooler to cool hydrogen, so that a large amount of energy can be saved, and the purposes of saving energy and reducing consumption are achieved.

Systems, methods, and apparatus for transporting and distributing hydrogen, storing energy on a large scale, and interconnecting locations where large quantities of "green" hydrogen can be most advantageously produced with cities, towns, and rural communities where hydrogen is needed for clean transportation fuel, industrial feedstock, power generation, and long-term storage of electricity. The hydrogen distribution pipeline enables the use of existing natural gas, oil, and other pipelines to transport hydrogen to one or more distribution points, and in one embodiment incorporates lighter-than-air airships to transport hydrogen between locations where pipelines do not exist or are impractical. The disclosed hydrogen distribution pipeline also enables the use of existing water, sewer, stormwater, and other pipelines for localized distribution, thereby saving time, money, and reducing construction disruption for communities in establishing these infrastructure elements necessary for widespread use of hydrogen to address climate change.

The utility model discloses a natural gas hydrogen doping and mixing device which comprises a device body, a circulation channel used for gas circulation is arranged in the device body, and the gas inlet end and the gas outlet end of the circulation channel are respectively provided with a rotary flange assembly. The rotating flange assembly comprises an inserting pipe, a connecting flange is arranged at one end of the inserting pipe, the other end of the inserting pipe is inserted into the circulation channel, and a sealing bearing is arranged between the inserting pipe and the device body. The utility model further provides a natural gas hydrogen-doped and hydrogen-mixed online conveying system which comprises a first natural gas conveying pipe and a second natural gas conveying pipe, and the natural gas hydrogen-doped and hydrogen-mixed device is installed between the first natural gas conveying pipe and the second natural gas conveying pipe. A hydrogen conveying pipe is connected to the first natural gas conveying pipe, and mounting flanges are arranged at the ends, facing the natural gas hydrogen doping and mixing device, of the first natural gas conveying pipe and the second natural gas conveying pipe correspondingly. The natural gas hydrogen-doped and mixed on-line conveying system has the advantage of being convenient to install.

This invention belongs to the field of cryogenic engineering research and application technology, specifically relating to a vacuum socket device for receiving and transferring liquid hydrogen. The device includes a sealing tube I, an outer tube I, a connecting tube I, an integral flange, a sealing tube II, a connecting tube II, an inner tube, a flange shoulder, an outer tube II, a flange ring, a threaded seal, a sealing ring, and a gasket. The protruding structure of the threaded seal, the annular gap B, and the large-diameter end face of the flange shoulder form chamber A. The annular gap A and the shoulder of the sealing tube II form chamber B. Chamber B communicates with an evacuation port machined on the side wall of the outer tube II. When a vacuum is drawn through the evacuation port, chamber B forms a vacuum chamber. The sealed chamber A is located outside the vacuum chamber B. This double-layered chamber enhances the effect of preventing heat exchange between liquid hydrogen and the external environment, significantly reducing evaporation loss of liquid hydrogen during transfer and reception. The socket joint has a flange connection structure, facilitating disassembly and improving the adaptability of the equipment.

This invention discloses a liquid hydrogen cold storage device and method, comprising several sealed containers nested from the inside out to form a multi-layered container system. Gaps are formed between adjacent sealed containers, and a phase-change medium is filled between the layers of the sealed containers. The vacuum freezing point of the phase-change medium is lower than the boiling point of hydrogen at atmospheric pressure. Supports are provided between the sealed containers for fixation. A high-vacuum wound insulation layer is provided outside the outermost sealed container, and an outer protective layer is placed over this high-vacuum wound insulation layer. This device uses a double-layer insulation structure to store liquid hydrogen, with the outer layer using high-vacuum wound insulation and the inner layer using low-pressure, high-purity nitrogen for pre-cooling and freezing to create absolute vacuum insulation. This device can be used for the storage of liquid hydrogen, facilitating the use and transportation of hydrogen.

The application discloses a hydrogenation pry and a working method thereof, and belongs to the technical field of hydrogenation. The hydrogenation pry comprises a hydrogenation pipeline for connecting a gas unloading column and a hydrogenation machine. The hydrogenation pipeline is sequentially provided with an air inlet filter, a first heat exchanger, a diaphragm compressor and a second heat exchanger. The first heat exchanger and the second heat exchanger are connected with a cooling circulation pipeline respectively. A pressure regulating pipeline is connected between an input end of the air inlet filter and an output end of the second heat exchanger. A nitrogen blowing pipeline is connected to an input end of the hydrogenation pipeline. The input end and an output end of the hydrogenation pipeline and the nitrogen blowing pipeline are all connected with a diffusion pipeline. The hydrogenation pry has a higher degree of automation, a higher hydrogen utilization rate and can reduce energy consumption.

The present invention relates to an offshore platform hydrogen-doped fuel supply system and an implementation method thereof, the system comprising: a low-hydrogen gas storage tank, one side of which is provided with a hydrogen inlet and a natural gas inlet, and the other side of which is provided with a low-hydrogen gas outlet; a hydrogen inlet and a natural gas inlet are formed in one side of the high-hydrogen gas storage tank, and a high-hydrogen gas outlet is formed in the other side of the high-hydrogen gas The first end of the hydrogen pipeline is connected with a hydrogen source, the second end of the hydrogen pipeline is divided into two branches, the first branch is connected with the hydrogen inlet of the low-hydrogen gas storage tank, and the second branch is connected with the hydrogen inlet of the high-hydrogen gas storage tank; the first end of the natural gas pipeline is connected with a natural gas source, the second end of the natural gas pipeline is divided into two branches, the first branch is connected with the natural gas inlet of the low-hydrogen gas storage tank, and the second branch is connected with the natural gas inlet of the high-hydrogen gas storage tank; a low-hydrogen gas outlet of the low-hydrogen gas storage tank is connected with low-hydrogen gas equipment through a low-hydrogen gas pipeline; and a high-hydrogen gas outlet of the high-hydrogen gas storage tank is connected with high-hydrogen gas equipment through a high-hydrogen gas pipeline.

The invention relates to a gravity backflow type hydrogen storage and supply device and system. The device comprises a storage pipeline, a plurality of hydrogen storage tanks, at least two water storage tanks and a power mechanism. And the storage pipeline is used for storing hydrogen produced by the hydrogen production equipment into the hydrogen storage tank. Each water storage tank is lower than each hydrogen storage tank in the gravity direction, and each water storage tank is communicated with each hydrogen storage tank through a first connecting pipeline and a second connecting pipeline. The power mechanism is arranged between the water storage tank and the hydrogen storage tank and can transfer water in the water storage tank to the hydrogen storage tank through the first connecting pipeline, so that the hydrogen storage tank can provide hydrogen outwards. After the hydrogen storage tank supplies gas outwards, water in the hydrogen storage tank can flow back into the water storage tank through the second connecting pipeline under the action of gravity, and meanwhile water in the next water storage tank can enter the next hydrogen storage tank through the first connecting pipeline under the action of the power mechanism. The device is low in power consumption, low in cost, high in safety and good in operation economy.

The invention relates to a method of detecting a leakage in a hydrogen refuelling, the method comprising establishing at a first and a second time a first and a second representation of at least one fluid parameter associated with hydrogen stored in at least one hydrogen storage tank of the hydrogen refuelling station, determining a relative difference between the first and second representation of the at least one fluid parameter, and comparing the relative difference with a threshold difference to detect a leakage. The invention further relates to a hydrogen refuelling station comprising a hydrogen storage module comprising a plurality of hydrogen storage tanks, a hydrogen station module comprising a compressor, and a dispensing module comprising at least one dispensing nozzle, the hydrogen refuelling station comprising at least one controller arranged to control the hydrogen refuelling station and arranged to detect a leakage using the beforementioned method.

The application relates to a hydrogen transfer pressurization and dehumidification device for a hydrogen refueling station and a use method. The device comprises a first storage tank, a second storage tank, a third storage tank, a liquid delivery pressurizer, a displacement liquid storage tank, a liquid delivery pipeline connector, a gas delivery pipeline connector, a decontaminator, a precooling dehumidifier and displacement liquid, and can be applied to the hydrogen refueling station. Hydrogen transported to the hydrogen refueling station is displaced from a transport tank body to a hydrogen storage tank on the station by the displacement liquid through the liquid delivery pressurizer, and is pressurized and stored, precooling and dehumidification are completed in the precooling dehumidifier, and finally, the hydrogen is filled into a high-pressure gas cylinder of a user. The application also comprises multiple hydrogen transfer pressurization methods. Compared with the existing hydrogen refueling station, the application eliminates the use of a hydrogen compressor, shortens hydrogen unloading time, improves hydrogen unloading rate, improves hydrogen refueling station operation efficiency, reduces equipment cost and operation cost, and is favorable for hydrogen refueling station scale use.

The present invention is a gas supply system for an ion implantation machine. The gas supply system includes a metal chamber, an electrically insulating box, a rigid insulating pipe fitting, and a flexible pipe fitting. A first and a second pipeline are arranged inside the metal chamber, and its bottom is fixed on the floor through a plurality of electrically insulating parts. The electrically insulating box is suspended on an outer side of the metal chamber. The rigid insulating pipe fitting is arranged inside the electrically insulating box. One end of the rigid insulating pipe fitting is connected to the second pipeline passing through the outer wall of the metal chamber, and the other end is connected to the flexible pipe fitting penetrating into the electrically insulating box. Since the electrically insulating box is suspended on one side of the metal chamber, in order to prevent the gas in the rigid insulating pipe fitting from being electrolytically ionized under the influence of the high voltage connected to the metal chamber, this doping gas needs to be a high-pressure gas. And the connection of the rigid insulating pipe fitting to the flexible pipe fitting can absorb the external vibration energy.

The present invention belongs to the technical field of hydrogen energy utilization and discloses an emergency disposal system for hydrogen leakage in a horizontal hydrogen transmission pipeline. By means of a full-path parallel water circuit and a closed cycle, the purpose of quickly eliminating the fire caused by possible hydrogen leakage is achieved. The entire device rotates through a bearing-type support sleeve, and uses the self-gravity of water flow to complete the switching of water injection and drainage. Compared with the prior art, it has the characteristics of intensification, safety, high feasibility, fast response time, no water loss, and can be recycled repeatedly, and is suitable for the anti-leakage emergency guarantee work of horizontally arranged hydrogen transmission pipelines.

The invention discloses a control method for a hydrogen production and hydrogenation integrated station. The hydrogen production and hydrogenation integrated station comprises hydrogen production equipment, a hydrogen buffer tank, a primary compressor, a primary hydrogen storage tank, a secondary compressor, a secondary hydrogen storage tank and hydrogenation equipment which are connected in sequence; in the hydrogenation process, according to the working pressure of the hydrogen buffer tank, the first-stage hydrogen storage tank, the second-stage hydrogen storage tank and the injected equipment, the maximum allowable injection pressure of the injected equipment, the first preset pressure, the second preset pressure, the maximum allowable working pressure of the second-stage hydrogen storage tank, the fourth preset pressure and the minimum gas inlet pressure of the first-stage compressor, the maximum allowable injection pressure of the injected equipment, the maximum allowable injection pressure of the injected equipment, the maximum allowable injection pressure of the injected equipment and the minimum gas inlet pressure of the second-stage compressor; and the hydrogen production equipment, the first-stage compressor, the second-stage compressor and the hydrogenation equipment are controlled to work according to the relation among the maximum allowable working pressure of the first-stage hydrogen storage tank, the third preset pressure, the maximum allowable working pressure of the hydrogen buffer tank and the minimum gas inlet pressure of the second-stage compressor. The on-demand starting and stopping of hydrogen production are realized, the loss is reduced, the service life of equipment is prolonged, and the cost and production hidden dangers are reduced.