16results about How to "High purity hydrogen" patented technology

The invention relates to the technical field of hydrogen production, in particular to equipment for preparing hydrogen from biomass, a method for preparing hydrogen from biomass and application. The equipment comprises a biomass pretreatment system and a chemical-looping hydrogen production system, wherein the biomass pretreatment system comprises a drying unit, a crushing unit and a granulating unit; the chemical-looping hydrogen production system comprises a biomass hydrogen production reduction reactor, a hydrogen purification device and a dust remover; the dust remover is connected with a regeneration storage tank and an air oxidation reactor; the air oxidation reactor is connected with the biomass hydrogen production reduction reactor; the granulating unit is connected with the biomass hydrogen production reduction reactor; a first heat exchanger is arranged between a synthesis gas outlet of the biomass hydrogen production reduction reactor and the hydrogen purification device, and a water vapor outlet of the first heat exchanger is connected with the biomass hydrogen production reduction reactor; and an oxygen-poor waste gas outlet of the air oxidation reactor is connected with the drying unit. The equipment is simple in structure, waste heat is fully utilized, energy consumption is reduced, hydrogen purity and yield are improved, and carbon dioxide is captured.

The invention discloses a method for improving alkaline water electrolysis hydrogen production efficiency by using electrolyte concentration difference, and belongs to the technical field of water electrolysis hydrogen production. The method comprises the following steps: adding KOH electrolyte with the concentration of 30wt% into the cathode region on one side of the diaphragm, and adding KOH electrolyte with the concentration of 35wt% into the anode region on the other side of the diaphragm; and electrifying the electrolytic bath, controlling the temperature to be 80-90 DEG C, and carrying out electrolytic reaction on the water under the action of the electric field. The hydrogen production efficiency of alkaline electrolyzed water is improved by utilizing the electrolyte concentration difference, the hydrogen production efficiency and the hydrogen purity can be improved, the energy consumption and the equipment cost can be reduced, the reliability and the durability of the system are improved, meanwhile, the environmental influence is reduced, and a positive role is played in promoting the production and the application of green hydrogen.

The invention discloses an electric hydrogen production and hydrogen compression multiplexing integrated system, and relates to the technical field of hydrogen energy. The problems that linkage of a water electrolysis hydrogen production system and a hydrogen compression system is insufficient, the equipment integration degree is insufficient, and economical efficiency is poor are solved. The system comprises a water source module, a water or low-pressure hydrogen pretreatment module, a reuse electrolytic bath, a low-pressure hydrogen storage module, a high-pressure hydrogen storage module and a power supply, the reuse electrolytic bath comprises an anode chamber and a cathode chamber which are separated by a proton exchange membrane; the anode chamber comprises a PEM anode chamber and an EHC anode chamber which are separated by an anode separation layer; an inlet of the water or low-pressure hydrogen pretreatment module is respectively communicated with outlets of the water source module and the low-pressure hydrogen storage module, and an outlet is selectively communicated with the PEM anode chamber or the EHC anode chamber; the cathode chamber is selectively communicated with the inlet of the high-pressure hydrogen storage module or the inlet of the low-pressure hydrogen storage module; the power supply can supply power to the multiplex electrolytic cell. The method is used for improving the hydrogen production performance.

The invention provides a formic acid cracking hydrogen production device in a pressurized water reactor environment, the formic acid cracking hydrogen production device comprises a pressurized water reactor first loop system, a pressurized water reactor second loop system and a hydrogen production system, the pressurized water reactor first loop system comprises a reactor, a voltage stabilizer and a steam generator, the reactor, the voltage stabilizer and the steam generator are sequentially connected to form a loop, the steam generator is connected with the second loop system and the hydrogen production system; the second loop system comprises a steam-water separator, a steam turbine and a condenser, the steam output end of the steam-water separator is connected with the steam turbine, a medium-pressure output port of the steam turbine is connected with the hydrogen production system, a low-pressure output port of the steam turbine is connected with the condenser, and the condenser is connected with the steam generator. The nuclear energy technology and the hydrogen production technology are combined, large-scale production of hydrogen is carried out, and the hydrogen production efficiency is improved.

The invention relates to a hydrogen purification device for hydrogen production through water electrolysis, and aims to provide a high-efficiency and high-purity hydrogen purification solution. The device comprises a hydrogen raw gas pool, a raw gas filtering pool, a purification module and a hydrogen collecting tank, the purification module adopts a palladium alloy membrane diffusion technology, and a spectrum detection module is combined to monitor the poisoning condition of a palladium alloy membrane and the hydrogen concentration in real time. Intelligent control over the hydrogen purification process is achieved through Fourier transform infrared spectroscopy (FTIR) analysis and a deep learning model FTIR-DeepNet. According to the method, through the steps of pretreatment, purification, spectral data acquisition and analysis, data processing and control, hydrogen collection and the like, impurities are effectively removed, the purity of hydrogen is improved to 99.99% or above, and high-end application requirements are met. The method has the advantages of being easy and convenient to operate, environmentally friendly, remarkable in economic benefit and the like, and has important significance for promoting commercial application of hydrogen energy.

This invention discloses a process for in-situ decarbonization of oily sludge using autocatalytic gasification of sintering circulating flue gas to produce hydrogen-rich gas, which is then reinjected into the sintering machine. The core innovation of this process lies in the fact that it eliminates the need for additional catalysts and carbon-fixing agents. It directly utilizes the metal oxides contained in the ash of the oily sludge as an autocatalyst and the calcium-based components as a carbon-fixing agent. Using sintering circulating flue gas as the gasification medium, under reaction conditions of 500-900℃, the autocatalytic gasification of the oily sludge and in-situ carbonization of CO2 are simultaneously achieved, thereby producing high-purity hydrogen-rich gas. This hydrogen-rich gas is then reinjected into the sintering machine, replacing fossil fuels in sintering production. Simultaneously, the iron- and calcium-rich residue generated after the reaction is recycled back into the ore and used as sintering raw material in the sintering process, realizing the resource recovery of valuable elements. This invention effectively achieves waste resource utilization, process decarbonization, and energy cascade utilization, significantly reducing the total carbon emissions and production operating costs of the sintering process.

The application provides a gas-liquid separation and purification system and method based on a liquid organic dehydrogenation process, which separates methylcyclohexane dehydrogenation products into gaseous dehydrogenation products and liquid dehydrogenation products through a first gas-liquid separator; an absorption tower receives the gaseous dehydrogenation products and removes organic components in the gaseous dehydrogenation products by means of an absorbent to obtain crude hydrogen; a molecular sieve filter receives the crude hydrogen, and high-purity hydrogen is obtained after filtration and purification; a solvent regenerator performs resolution and regeneration treatment on the liquid phase mixed components discharged from the absorption tower, so that the absorbent in the liquid phase mixed components is enriched at the bottom of the tower, the organic components are enriched at the top of the tower, the absorbent enriched at the bottom of the tower is returned to the absorption tower, and the regeneration and reuse of the absorbent are completed. The combination of the absorption tower and the regenerator can solve the separation problem of hydrogen and aromatic organic matter, reduce the load of the purification section, effectively prolong the service life of the material in the absorption section, and realize deep purification of hydrogen and efficient recovery of organic matter.

The present application belongs to the technical field of extraction and utilization of high-value components in industrial tail gas, and discloses a device and method for extracting hydrogen from industrial tail gas. The device comprises a heat exchanger, a high-temperature-resistant ceramic cylinder, a direct-current power supply and a cooler. Water vapor is used as a carrier gas to carry out the prepared hydrogen, which can reduce the electrolysis voltage and the power consumption for extracting hydrogen. The method of applying an external voltage is used to provide the driving force for hydrogen extraction, which can extract hydrogen from tail gas with low hydrogen concentration and improve the utilization rate of hydrogen resources. The device and method for extracting hydrogen from low-hydrogen-content high-temperature industrial tail gas are provided to solve the problem that hydrogen cannot be directly extracted from high-temperature industrial tail gas with low hydrogen concentration, resulting in a large amount of hydrogen resource waste. The device and method can directly extract hydrogen from high-temperature industrial tail gas with low hydrogen content by using high-temperature proton conductor ceramics, and water vapor is used as a carrier gas to carry the extracted hydrogen, which can reduce the power consumption for extracting hydrogen and efficiently prepare high-purity hydrogen.

The invention relates to a methanol steam reforming hydrogen production parameter optimization method and a methanol steam reforming hydrogen production system.The method comprises the steps that a target partition drag force model is obtained, and a first methanol steam reforming hydrogen production fluidized bed model is established based on the target partition drag force model; performing model verification on the first methanol steam reforming hydrogen production fluidized bed model; after the first methanol steam reforming hydrogen production fluidized bed model passes verification, setting particles of the first methanol steam reforming hydrogen production fluidized bed model as catalyst particles and carbon dioxide adsorbent particles so as to form a second methanol steam reforming hydrogen production fluidized bed model; and carrying out numerical simulation on the second methanol steam reforming hydrogen production fluidized bed model to determine a target parameter according to a numerical simulation result of the second methanol steam reforming hydrogen production fluidized bed model, thereby improving a parameter optimization effect during methanol reforming hydrogen production. Reliable basis and theoretical support are provided for actual methanol steam reforming hydrogen production fluidized bed hydrogen production.

The invention provides an alkali liquor mutual heating energy-saving system of an alkali water electrolysis hydrogen production device and a use method. The alkali liquor mutual heating energy-saving system comprises a plurality of alkali liquor mutual heating energy-saving subsystems, each alkali liquor mutual heating energy-saving subsystem comprises a hydrogen-oxygen separation unit, an electrolytic cell, an alkali liquor heat exchanger, an alkali liquor isolation valve, an alkali liquor mutual heating communication pipeline first automatic valve, an alkali liquor mutual heating communication pipeline first manual valve, an alkali liquor filter first automatic valve, an alkali liquor filter first manual valve and an alkali liquor filter second automatic valve; an alkali liquor filter second manual valve, an alkali liquor mutual-heating communicating pipeline second automatic valve, an alkali liquor mutual-heating communicating pipeline second manual valve and an alkali liquor circulating pump are arranged on the base. According to the system, heat exchange is carried out on low-temperature alkali liquor in the standby electrolytic bath which is stopped or powered off and high-temperature alkali liquor in the running electrolytic bath, so that the low-temperature alkali liquor is heated, electric energy consumed by heating of the low-temperature alkali liquor is reduced, and it is guaranteed that the temperature of the alkali liquor in the running electrolytic bath is within a safe range; and the safety of the system is improved.

The invention discloses a carbon monoxide poisoning resistant electrochemical hydrogen purification and compression membrane electrode and a preparation method thereof. The preparation method comprises the following steps: mixing a catalyst, a carrier, a binder and a solvent, and carrying out grinding, pulping and ultrasonic treatment to obtain catalyst ink; transferring the catalyst ink to two sides of a proton exchange membrane at room temperature, and performing vacuum high-temperature drying after the catalyst ink is naturally dried to obtain a catalyst layer; the two sides of the proton exchange membrane containing the catalyst layer are each covered with a gas diffusion layer, and then the gas diffusion layers and the membrane are subjected to hot pressing treatment; and respectively covering two sides of the gas diffusion layer with a layer of porous metal support plate to form the membrane electrode. The membrane electrode has good purification and compression effects on hydrogen mixed gas containing carbon monoxide, the hydrogen pressure can reach 50 MPa under the CO and H2 mixed gas inlet condition, and the hydrogen purity can reach 99.97%.

The invention provides a hydrogen drying system and a drying method. The hydrogen lossless drying system comprises at least two drying modules used for drying raw material hydrogen; the raw material hydrogen main inlet pipe (H1) is used for providing raw material hydrogen for the at least two drying modules; the product hydrogen total outlet pipe (H9) is used for outputting the product hydrogen treated by the at least two drying modules; and the pipeline assembly comprises a hydrogen pipeline and a valve arranged on the hydrogen pipeline, and is used for controlling the flow direction and the flow rate of the raw material hydrogen so as to realize the switching of a series connection state, a parallel connection state or a hot standby state between the at least two drying modules. According to the hydrogen drying system, the load range of hydrogen purification can be widened, and the hydrogen purity is improved.

The utility model discloses a high-temperature reactor for producing hydrogen by decomposing methane with molten metal and separating high-value carbon, which comprises a reaction tube, storage tubes are arranged at two ends of the reaction tube, the storage tubes are detachable, fan blade carbon absorbers are arranged at two ends of the middle side of the reaction tube, a crank connecting rod device is arranged in the reaction tube, and the crank connecting rod device is connected with the fan blade carbon absorbers. A quartz baffle is arranged at the lower end of the crank connecting rod device, a sealing device is arranged at the upper end of the reaction tube, a gas inlet is formed in the sealing device, a gas inlet pipe and a gas outlet are arranged on the gas inlet, the gas inlet pipe is inserted into the reaction tube, and the gas outlet is connected with a hydrogen storage device. A thermal insulation layer is arranged at the lower end of the reaction tube, and a heater is arranged between the thermal insulation layer and the reaction tube; a sponge circular ring is arranged at the upper end of the heater. The device utilizes molten metal to directly catalyze and decompose methane to directly crack and produce hydrogen and high-value carbon, and has the advantages of high methane conversion rate, generation of additional high-value carbon, zero carbon emission, low energy consumption, low cost, easiness in industrialization and the like.

The utility model discloses a gas-liquid separator for an electrolytic hydrogen production system, which comprises a first separation component and a second separation component, and the first separation component is communicated with the second separation component through a first pipeline; the first separation assembly comprises a first barrel and a plurality of corrugated plates, and the corrugated plates are fixed in the first barrel in the vertical direction; the first separation assembly further comprises a first air inlet and a first air outlet, the first air inlet and the first air outlet are oppositely formed in the first barrel in the radial direction of the first barrel, and the multiple corrugated plates are located between the first air inlet and the first air outlet to form an air guide channel. The first separation assembly is used for carrying out preliminary dehumidification treatment on wet hydrogen, and the second separation assembly is used for carrying out secondary sufficient dehydration treatment on the wet hydrogen subjected to preliminary treatment, so that the hydrogen purity of the electrolytic hydrogen production system is improved.

The application discloses a hydrogen deep purification method with wide load and high recovery rate, which comprises the following steps: crude hydrogen containing oxygen, water and carbon dioxide is introduced into a deoxidation reactor filled with a catalyst to perform a catalytic deoxidation reaction, so that oxygen reacts with hydrogen to generate water, and high-temperature wet hydrogen is obtained; wherein the deoxidation reactor is filled with at least a low-temperature activation catalyst and a medium-high-temperature main catalyst; the high-temperature wet hydrogen is cooled, and liquid water generated by condensation is separated, so that saturated micro-wet hydrogen rich in carbon dioxide is obtained; and the saturated micro-wet hydrogen is introduced into an adsorption system to perform deep dehydration and decarburization on the saturated micro-wet hydrogen, so that high-purity product hydrogen is obtained. The embodiment of the application can maintain stable high-purification effect in a wide load range, and meets application requirements.

The utility model relates to the technical field of hydrogen production through water electrolysis, and discloses a hydrogen dehydration system which comprises a dehydration unit, a product output unit, a heating unit and a regenerated product separation unit, wherein the dehydration unit comprises at least three dehydration towers and a plurality of raw material feeding switch valves; the product output unit comprises a hydrogen header pipe; the heating unit comprises a regeneration heater; the regeneration heater is connected with the dehydration unit and the product output unit; and the regenerated product separation unit is connected with the dehydration unit. According to the hydrogen dehydration system provided by the utility model, the serial and parallel connection modes of the dehydration towers are flexibly adjusted through the switching of the switch valves, the hydrogen dehydration system can be flexibly adapted to hydrogen with different gas volumes obtained by hydrogen production through upstream alkaline water electrolysis and hydrogen with different water volumes, the purity of the product hydrogen is high, and almost no hydrogen is wasted in the system operation process; and hydrogen drying and drying agent regeneration can be simultaneously carried out and flexibly switched.