1587results about "Energy input" patented technology

The utility model discloses a seawater concentration bromine extraction system based on deep waste heat recovery and new energy driving, and belongs to the technical field of salt chemical industry and new energy. On the basis of an existing seawater concentration bromine extraction system, a new energy mode is adopted for process heating, and heat exchange jackets are arranged on the outer walls of a sulfur combustion furnace 1 and a high-temperature SO2 flue 3; low-temperature air is sequentially fed into a heat exchange sleeve 26 and a heat exchange sleeve 20 through an air feeder 21 and exchanges heat with high-temperature and high-corrosion flue gas in a flue and higher-temperature flue gas in a sulfur combustion furnace, then the low-temperature air is fed into a miniature high-temperature waste heat hot water boiler 10, water is fed into a heating furnace, and cooled flue gas is subjected to circulating heat exchange through the air feeder 21. High-temperature water of the miniature high-temperature waste heat hot water boiler 10 is fed into the flash tank 23 and generates flash steam, and after the temperature of outlet water is reduced, the outlet water returns to the flash tank 23 for circulating heat exchange. Flash steam of the flash tank 23 is mixed with steam produced by the high-temperature heat pump steam producing device 37 and the new energy electric heating steam furnace 38, and then the mixture is sent to the liquid chlorine water bath 51 and the like for process heating.

Electrical power derived from a renewable energy source is used to perform water electrolysis to produce oxygen and hydrogen. A flue gas and heat are produced from combustion of a fuel using at least a portion of the oxygen generated by electrolysis. A feed stream including hydrocarbon oil is hydroprocessed using the generated heat and at least a portion of the hydrogen generated by electrolysis to produce a product including a saturated hydrocarbon. At least a portion of the flue gas is hydrogenated using at least a portion of the hydrogen generated by electrolysis to produce a second product stream including a hydrocarbon, an oxygenate, or both.

The invention provides a petroleum coke drying and calcining system, which belongs to the technical field of tar treatment and comprises a feeding bin, a waste heat rotary drying furnace, a calcining furnace, a slag cooler, a receiving bin and a tail gas incineration chamber connected with the calcining furnace. The green petroleum coke raw material is fed into a waste heat rotary drying furnace to be dried; a drying furnace water vapor outlet, a drying furnace smoke outlet and a drying furnace waste heat tail gas inlet are formed in the waste heat rotary drying furnace; high-temperature tail gas generated by calcining and volatilizing materials in the calcining furnace enters the tail gas incineration chamber through the calcining furnace tail gas volatilization opening, and high-temperature tail gas generated by mixed combustion of the high-temperature tail gas and fuel gas entering the tail gas incineration chamber enters the calcining furnace and reversely flows with the materials in the calcining furnace to calcine the materials in the calcining furnace, so that primary utilization of the tail gas is realized. The high-temperature tail gas is calcined to absorb heat to form low-temperature tail gas, and the low-temperature tail gas enters the waste heat rotary drying furnace to dry materials, so that secondary utilization of the tail gas is realized, and the problems of low integration degree, high production cost and low treatment efficiency are solved.

The invention discloses an off-grid ALK-PEM green energy coupling hydrogen production system parameter configuration method. The method comprises the steps that S1, wind and light fluctuation characteristic parameters are collected; s2, calculating the capacity ratio of the electrolytic cell; s3, performing control parameter mapping; and S4, parameters of the cooling system are designed. The invention further discloses a corresponding configuration system, a configuration device, electronic equipment and a computer readable storage medium, and aims at a parameter collaborative configuration method of an alkaline electrolytic cell (ALK) and proton exchange membrane electrolytic cell (PEM) mixed hydrogen production system in a wind and light off-grid power supply scene, so that the core problems of low hydrogen production efficiency, short equipment service life, system instability and the like under a fluctuating power supply are solved.

The utility model relates to a limit protection device of a dry quenching elevator, which belongs to the technical field of coking dry quenching equipment and is used for protecting the limit of the dry quenching elevator. According to the technical scheme, a base is a rectangular plate, a fixing support is perpendicularly welded to the plate face of the base, an adjusting movable plate is connected with the fixing support through an adjusting fastening bolt, a limiting fixing plate is perpendicularly welded to the front end of the adjusting movable plate, and a U-shaped limiting plate is fixed to the plate face of the limiting fixing plate through a limiting fixing bolt; the two upper limiting guide plates and the two lower limiting guide plates are located on the two sides of the U-shaped limiting device respectively and are perpendicularly connected with the plate face of the limiting fixing plate in a welded mode respectively, and the upper limiting guide plates and the lower limiting guide plates on the two sides of the U-shaped limiting device respectively form two V-shaped guide grooves. The elevator limiting device is simple in structure and reliable in work, the elevator can be protected from being damaged due to the fact that the elevator is scratched by the running elevator, safety and equipment hidden dangers are effectively eliminated, and normal running of the elevator is guaranteed.

The invention provides a hydrogen production rate-based dynamic adjustment method for an alkaline electrolytic cell, which comprises the following steps of: constructing a function model of electric power and hydrogen production rate of the alkaline electrolytic cell, optimizing the array configuration of the electrolytic cell in combination with historical wind and light data, dividing the operating state of a single electrolytic cell, and dynamically distributing the operating state in a value rotation mode. And the matching between the wind-solar power and the hydrogen production requirement is realized. The method comprises the following specific steps: constructing a power-hydrogen production rate mapping model to predict power consumption demands; determining the capacity of the electrolytic cell array based on the wind-solar power peak; distributing the number of the electrolytic cells in each state through a circular queue rotation strategy; and adjusting the operation power instruction according to the hydrogen production rate working condition. The system does not need an energy storage device, the wind and light fluctuation is absorbed through the self-state combination of the electrolytic cell array, and the problems of high cost, non-uniform equipment loss, high electrolytic cell monomer loss difference and the like caused by energy storage dependence in the traditional technology are solved.

The invention relates to the technical field of steel sintering processes, in particular to a biomass gasification coupling system for a steel sintering process, which comprises a biomass gasification system, a circular cooler waste heat utilization system and a waste heat power generation system, the biomass gasification system comprises a biomass drying system, a raw material conveying belt system, a biomass gasification furnace, a biomass gas heat insulation combustion chamber, a sintered coke powder preparation system and a biomass gas purification system, and the biomass drying system is used for drying biomass raw materials; and the dried biomass raw materials are conveyed to the biomass gasification furnace through the raw material conveying belt system. According to the coupling system for biomass gasification for the steel sintering process and the control method, biomass serves as zero-carbon energy, and biomass charcoal obtained after biomass gasification can replace part of solid fuel to achieve the carbon reduction effect. Meanwhile, the biomass gasified gas can replace a part of coal gas, and the carbon reduction effect can also be achieved.

The invention provides a garbage pyrolysis gasification multi-stage directional regulation-gas-solid phase reforming synergistic hydrogen production treatment process which comprises the following steps: first-stage regulation: pretreatment and graded feeding: crushing, sorting, drying and catalytic coating treatment are performed on garbage through a physical-chemical directional means; second-stage regulation and control: performing low-temperature pyrolysis directional dechlorination, and performing thermochemical directional conversion on plastic and biomass garbage at 350-450 DEG C; third-stage regulation and control: gasifying and melting are coordinated and oriented, and a gas-solid phase coupling reaction is realized in double fluidized beds at 800-900 DEG C; four-stage regulation and control: multi-stage gas-solid phase reforming is carried out, and the hydrogen yield is increased through catalysis-adsorption synergistic effect in a 700 DEG C moving bed; and five-stage regulation and control: deep purification and hydrogen purification, wherein the synthesis gas is selectively oxidized by utilizing chemical looping combustion to release hydrogen with the purity being greater than or equal to 99.99%. According to the invention, the molten ash is used as a catalytic carrier, and the Fe-Ce active sites of the molten ash are utilized to synchronously realize tar cracking and synthesis gas reforming, so that the conversion rate of tar is effectively improved.

The invention belongs to the technical field of industrial waste heat resource utilization, and provides a hydrogen-fused salt energy storage coupled industrial waste heat recovery hydrogen production system and method, a fused salt energy storage subsystem comprises an energy storage module and a waste heat heat exchange module which are connected with each other, and a thermochemical circulation subsystem adopts a reactor; the reactor adopts a horizontal fixed bed reactor, and CaO-Ca (OH) 2 particles are filled in the reactor; a heat absorption stage: the high-temperature molten salt flows through a reactor jacket, a bed layer is heated to a first preset temperature, Ca (OH) 2 is subjected to a decomposition reaction, and nitrogen is introduced in the reaction process; a heat release stage: introducing water vapor into the reactor, carrying out hydration reaction on the water vapor and CaO, heating the fused salt to a second preset temperature by virtue of reaction heat release, and providing a heat source for the electrolytic hydrogen production subsystem; through coupling of a fused salt energy storage system and CaO-Ca (OH) 2 thermochemical circulation, efficient recovery and utilization of low-grade waste heat at the temperature of 300-500 DEG C are achieved, an electrolytic bath is driven to produce hydrogen at low cost, the heat efficiency of the system is improved to 75% or above, and green hydrogen self-supply in the high-energy-consumption industry is promoted.

The invention discloses a device for preparing a molten carbon fertilizer through solid waste microwave pyrolysis and waste heat recovery, and belongs to the field of solid waste treatment and recycling. The device is composed of a pretreatment unit, a microwave pyrolysis unit, a gas-solid separation unit, a gas phase treatment unit, a solid phase treatment unit and a waste heat circulation unit, solid waste enters a microwave rotary kiln after being dried and crushed, a magnetron generates microwave anaerobic pyrolysis under photovoltaic power supply, and a high-temperature gas-solid product is generated; the cyclone separator is used for separating flue gas from solid carbon, the flue gas is condensed to obtain pyrolytic oil and gas, and waste heat of medium-temperature flue gas is recovered through the heat accumulating type heat exchanger for drying; cooling the solid carbon through a heat pipe heat exchanger, recovering waste heat and liquefying urea, and mixing the solid carbon and the urea in a stirring melting pool to prepare a molten carbon fertilizer; and the waste heat backflow fan sends the carbon waste heat back to the drying chamber. The system is driven by green electricity, gas and solid phase waste heat is recovered through double paths, solid waste efficient pyrolysis-product high value-energy self-circulation is achieved, and energy consumption and carbon emission are reduced.

The invention relates to the field of industrial silicon melt purification, and discloses an industrial silicon melt purification method based on directional solidification and composite adsorption, which comprises the following steps: S1, multi-stage directional solidification pre-enrichment: carrying out primary directional solidification treatment on an industrial silicon melt, and controlling the solidification rate to be 0.5-5mm / min and the temperature gradient parameter, most of metal impurities in the melt are pre-enriched in a specific area; s2, dynamic targeted adsorption: in or after the primary directional solidification process, an efficient composite adsorbent is dynamically and continuously added into an impurity-rich area of the melt or the whole melt in batches, and the composite adsorbent has selective adsorption capacity for different impurities; and S3, intelligent regulation and control: constructing a full-flow adaptive intelligent dynamic regulation and control system based on digital twinning and AI algorithms. Compared with the prior art, the method has the advantages that the impurities are efficiently and stably removed, the grain structure is accurately modified, and meanwhile, the green and low-carbon production target is achieved.

The invention relates to the technical field of renewable energy source and process industrial intelligent control, and discloses a full-process optimization method and system for synthesizing ammonia through wind-solar hydrogen production, which can realize full-process collaboration and self-adaption to wind-solar fluctuation, and can guarantee system safety and economy in long-term operation. According to the scheme, the method comprises the steps that running state data of a wind-solar power generation system, a hydrogen production system, a hydrogen storage system and a synthetic ammonia system are collected in real time, and the collected data are preprocessed; establishing a device-level adaptive boundary model, and calculating a dynamic safe operation boundary of the key device; inputting wind-solar power prediction of a future time domain, performing rolling optimization based on the multi-objective optimization model according to constraint conditions, and generating load setting instructions of each system; and executing the load setting instruction, collecting real response data of the system, comparing a deviation between a real response and a predicted response, calculating a multi-dimensional deviation index, and when the deviation exceeds a set threshold value, performing feedback calibration on the equipment-level adaptive boundary model.

The utility model discloses a multi-stage treatment system for high-salinity wastewater, which comprises a water sample detection and analysis system for sampling and analyzing the high-salinity wastewater in at least three batches to obtain the pH value, COD (Chemical Oxygen Demand), TDS (Total Dissolved Solids), hardness and the numerical value range of each pollutant content of the wastewater; the ozonization system is used for fully contacting the detected and analyzed high-salinity wastewater with ozone to obtain ozonized effluent; the pretreatment system is used for settling and filtering the ozonized effluent to obtain pretreated effluent and a pretreated concentrated solution; the electrolytic hydrogen production system is used for carrying out in-situ electrolysis on the pretreated effluent to obtain hydrogen, oxygen and a wastewater concentrated solution; the membrane distillation system is used for carrying out membrane distillation treatment on the wastewater concentrated solution to obtain pure water and a membrane distillation concentrated solution; the evaporation system is used for carrying out evaporation treatment on the pretreatment concentrated solution and the membrane distillation concentrated solution to obtain solid waste. According to the utility model, the wastewater utilization rate is greater than 80%, the hydrogen purity is greater than 99.9%, and the TDS of membrane distillation pure water is less than 50mg / L.

This invention provides processes and systems for converting biomass into high-carbon biogenic reagents that are suitable for a variety of commercial applications. Some embodiments employ pyrolysis in the presence of an inert gas to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases, followed by separation of vapors and gases, and cooling of the hot pyrolyzed solids in the presence of the inert gas. Additives may be introduced during processing or combined with the reagent, or both. The biogenic reagent may include at least 70 wt %, 80 wt %, 90 wt %, 95 wt %, or more total carbon on a dry basis. The biogenic reagent may have an energy content of at least 12,000 Btu / lb, 13,000 Btu / lb, 14,000 Btu / lb, or 14,500 Btu / lb on a dry basis. The biogenic reagent may be formed into fine powders, or structural objects. The structural objects may have a structure and / or strength that derive from the feedstock, heat rate, and additives.

The invention relates to the technical field of brick machines, and discloses an extrusion forming device suitable for coke oven glazed bricks, which comprises a feeding mechanism and a forming mechanism, the forming mechanism comprises a forming die, a hydraulic assembly used for extruding and forming raw materials and an ejection assembly used for ejecting brick bodies formed through extrusion. The forming die is provided with a plurality of side-by-side vertically-through forming groove bodies. According to the extrusion forming device for the glazed bricks of the coke oven, through the unique design of the filler assembly, the problems that powder raw materials are prone to accumulation, adhesion, uneven distribution and the like in the automatic filling process are systematically solved; the partition bodies are arranged in the filling hopper, so that the raw materials are accurately and directionally filled into a plurality of parallel forming groove bodies, the consistency and accuracy of the filling amount of each brick body are fundamentally ensured, and the sizes and the densities of finished bricks are uniform as much as possible.

The application discloses a cold plasma microbubble and biomass supercritical water gasification hydrogen production system and method, and belongs to the field of biomass hydrogen production. The system comprises a raw material processing unit, a cold plasma pre-activation unit, a high-pressure subcritical pretreatment unit, a supercritical gasification reaction unit, a gas-liquid separation unit, a hydrogen gas purification unit, a waste heat recovery unit and a circulating water treatment unit. After being pulped, the raw material is modified by the cold plasma pre-activation unit to improve the activity, and then enters the supercritical reactor with a built-in catalytic bed through the high-pressure subcritical pretreatment unit containing plasma microbubble generated active species to complete the gasification. After the product gas-liquid separation, the hydrogen-containing gas is purified to obtain high-purity hydrogen gas, the liquid phase water is purified and reused, the waste heat is recovered to supply system energy consumption, and the circulating water is treated to discharge crystalline salt to prevent salt analysis. The application realizes the deep cooperation of cold plasma and supercritical water gasification, improves the gasification efficiency and hydrogen production selectivity, reduces the energy consumption, tar and carbon deposition, guarantees the stable operation of the system, reduces the comprehensive cost, and is suitable for the industrialization of biomass hydrogen production.

The invention discloses a system and method for producing hydrogen-rich fuel gas by coupling concentrating solar energy with biomass chemical looping gasification, and the system comprises a concentrating module which is used for concentrating solar energy to a fuel reactor; the fuel reactor is arranged at the focal plane of the condensation module and is used for reacting the biomass with the oxygen carrier solid particles to obtain synthesis gas and reduced oxygen carrier solid particles; the water vapor reactor is used for oxidizing the reduced oxygen carrier solid particles to generate hydrogen and oxidized oxygen carrier solid particles, and feeding the oxidized oxygen carrier solid particles into the fuel reactor to circulate and react with the biomass; and the synthesis gas regulator is used for receiving the synthesis gas and the hydrogen to obtain hydrogen-rich fuel gas. Energy is provided for the fuel reactor through the condensation module, oxygen carrier regeneration cycle is completed through the water vapor reactor, and the problems of nitrogen mixing and synthesis gas dilution caused by the fact that energy is provided by an air reactor in the prior art are solved.

This invention provides processes and systems for converting biomass into high-carbon biogenic reagents that are suitable for a variety of commercial applications. Some embodiments employ pyrolysis in the presence of an inert gas to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases, followed by separation of vapors and gases, and cooling of the hot pyrolyzed solids in the presence of the inert gas. Additives may be introduced during processing or combined with the reagent, or both. The biogenic reagent may include at least 70 wt %, 80 wt %, 90 wt %, 95 wt %, or more total carbon on a dry basis. The biogenic reagent may have an energy content of at least 12,000 Btu / lb, 13,000 Btu / lb, 14,000 Btu / lb, or 14,500 Btu / lb on a dry basis. The biogenic reagent may be formed into fine powders, or structural objects. The structural objects may have a structure and / or strength that derive from the feedstock, heat rate, and additives.

According to the system, a PEM electrolytic hydrogen production subsystem electrolyzes fresh water through renewable energy source electric power to produce high-pressure hydrogen and oxygen, and a first strand of medium-low temperature waste heat is generated; the methanol synthesis subsystem synthesizes a green methanol product and generates a second stream of medium and low temperature waste heat; the nanofiltration-reverse osmosis combined seawater desalination subsystem is connected with the PEM electrolytic hydrogen production subsystem, the nanofiltration-reverse osmosis combined seawater desalination subsystem performs seawater pretreatment, nanofiltration desalination softening and reverse osmosis deep desalination to generate fresh water, and the fresh water is buffered by a fresh water storage tank and then is fed back to the PEM electrolytic hydrogen production subsystem to form a fresh water closed loop; the heat recovery loop is used for preheating a seawater feed entering the nanofiltration-reverse osmosis combined seawater desalination subsystem by using the first medium-low temperature waste heat from the PEM electrolytic hydrogen production subsystem and / or the second medium-low temperature waste heat from the methanol synthesis subsystem, so that the viscosity of the seawater feed is reduced, and the membrane flux is improved or the operation pressure is reduced.

The invention relates to the technical field of off-grid renewable energy hydrogen production, and discloses an off-grid alkaline hydrogen production system and a power adaptive distribution and safety control method thereof, the off-grid alkaline hydrogen production system comprises a renewable energy power supply unit, a parallel electrolytic cell module, a gas-liquid treatment system and a main controller; in the Faraday hydrogen production mode, the bubble volume is compressed by adjusting the operation pressure so as to modulate the impedance characteristic of the electrolytic cell, and the energy efficiency is improved in cooperation with current control; and in the non-Faraday polarization hot standby mode, the voltage of the rectifier cabinet is controlled to be clamped to a non-gassing polarization interval, and liquid level plugging is constructed in the U-shaped communicating pipeline according to the fluid statics principle. The system is further provided with a transient buffering strategy based on the pneumatic capacity, and pressure attenuation is delayed through the gas dead zone volume when power is suddenly reduced. The problems of hydrogen production efficiency optimization, low-power safe hot standby and mechanical protection under wide power fluctuation are effectively solved.

The invention discloses a non-catalytic and catalytic coupling synthesis gas preparation device and application thereof to synthesis gas preparation, the device comprises a non-catalytic reactor, a catalytic reactor, a pre-catalytic reactor, a waste heat boiler, a plurality of heat exchangers, a connecting pipeline and the like, and the pre-catalytic reactor is also provided with a heat exchanger structure; a pre-catalytic reaction cavity is arranged between a cold end inlet and a hot end outlet of the pre-catalytic reactor; the heat exchanger is used for preheating oxygen and part of raw materials and feeding into the non-catalytic reactor; the rest of the raw materials are preheated again and then fed into the pre-catalytic reactor and the non-catalytic reactor, reactants of the pre-catalytic reactor are fed into the catalytic reactor for continuous reaction, reactants of the catalytic reactor are used for supplying heat to the pre-catalytic reactor, the heat exchanger and the waste heat boiler, and the waste heat boiler can be used for preparing raw material steam; and heat balance adjustment of the whole device can also be participated. The device is high in heat utilization rate and conversion rate, can adjust the hydrogen-carbon ratio of the synthesis gas, and is particularly suitable for preparing methanol synthesis gas from natural gas and the like.

The invention relates to the technical field of carbon sequestration and hydrogen production, and discloses a carbon sequestration and hydrogen production method and a carbon sequestration and hydrogen production device combined with new energy surplus electric power, and the carbon sequestration and hydrogen production method combined with new energy surplus electric power comprises the following steps: regulating and controlling the temperature and pressure of a geological reaction ore bed; carrying out degassing treatment on the water to obtain degassed water; injecting a mixed solution of carbon dioxide and the degassed water into the geological reaction ore bed; carrying out carbon dioxide mineralization storage and hydrogen production reaction to obtain carbonate minerals and hydrogen; purifying the hydrogen to obtain purified hydrogen; the new energy surplus electric power is used for providing driving force for the carbon sequestration hydrogen production method. The carbon sequestration and hydrogen production method is high in reaction efficiency and reaction rate, not only assists carbon dioxide emission reduction, but also can obtain high-purity hydrogen, can also consume new energy surplus electric power, and has both environmental protection and resource utilization values.

The utility model relates to the technical field of drying and energy saving, and particularly discloses a cobalt nickel hydroxide or cobalt hydroxide drying system based on waste heat steam utilization, which comprises a mixing device, a steam rotary drying device, a dust removal device and a spray washing device which are connected in sequence, steam in the upstream flash evaporation process is subjected to deacidification treatment and then is introduced into a heat exchange tube bundle of the steam rotary drying device to serve as a heat source; the discharging end of the steam rotary drying device is respectively connected with a discharging branch and a material returning loop through a discharging screw; the material returning loop is connected to one feeding hole of the material mixing device, and the other feeding hole of the material mixing device is connected with a nickel cobalt hydroxide or cobalt hydroxide wet material conveying device. An indirect heat exchange mode is adopted, only a small amount of hot air is needed to serve as moisture-carrying gas, the tail gas amount is greatly reduced, meanwhile, damage to materials caused by direct contact with high-temperature hot air in a traditional drying mode is avoided, the physical property of the materials can be kept, and the particle size and quality of products are improved.

This invention discloses a deep peak-shaving system and method for thermal power plants based on ammonia cracking hydrogen production coupled with deep utilization of waste heat. It relates to the field of thermal power generation and includes a gasifier, an ammonia cracking hydrogen production unit, a cooler, a separator, an ammonia storage tank, an ammonia-hydrogen storage system, a peak-shaving burner, and a boiler. This invention utilizes the waste heat of the thermal power boiler to vaporize liquid ammonia into gaseous ammonia. The ammonia cracking hydrogen production unit uses medium- and high-temperature waste heat or electrical energy, along with an ammonia cracking catalyst, to crack a portion of the ammonia gas, producing an ammonia-hydrogen-nitrogen mixture. This mixture is then separated by a separator to obtain an ammonia-hydrogen mixture. The ammonia-hydrogen mixture is mixed with ammonia gas to produce mixtures with different ammonia-hydrogen ratios, which are stored in the ammonia-hydrogen storage tanks. The ammonia-hydrogen ratio used in the burner is adjusted according to different loads to maintain stable combustion. This invention can maintain stable combustion in the burner under low loads, achieving deep peak-shaving of thermal power plants, and can also deeply utilize waste heat from thermal power plants, improving power generation efficiency.

The invention provides a control method and device of an alkaline electrolyzed water system, an MPC controller optimizes hydrogen flow and auxiliary power supply power in real time through a prediction model in each control period to obtain an optimal control sequence of the current control period, and based on a first control parameter in the optimal control sequence, a second control parameter in the current control period is obtained; and cooperatively regulating the hydrogen-oxygen side pressure difference of the alkaline electrolyzed water system to a target value, and meanwhile, controlling the hydrogen concentration in oxygen of the alkaline electrolyzed water system within a safety threshold value. According to the scheme, the input is controlled based on rolling optimization of the multivariable dynamic prediction model, the dual targets of pressure difference stabilization and inhibition of the hydrogen content in oxygen are achieved, the technical problem that dynamic balance and the HTO risk are difficult to consider in traditional single parameter adjustment is solved, and the hydrogen production efficiency and safety are remarkably improved in the scene of wind and light fluctuation.

The invention provides a series-parallel hydrogen production cluster hierarchical control method based on day-ahead-day two-stage optimization, and the method comprises the steps: building a first-stage model with the maximization of the adjustable capability and the optimization of the economical efficiency of a hydrogen production system as targets; taking renewable energy output tracking precision and controlled quantity fluctuation minimization as targets, and constructing a second-stage model; combining the first-stage model and the second-stage model to construct a day-ahead-day-intra-day two-stage layered control framework of the wind-solar off-grid hydrogen production system; and carrying out renewable energy local consumption and economic operation control of the wind and light off-grid hydrogen production system by adopting the day-ahead-day two-stage wind and light off-grid hydrogen production system hierarchical control framework. According to the method, dual optimization of renewable energy consumption and system economy is achieved in a large-scale renewable energy hydrogen production cluster, a complex optimization problem is decomposed into sub-problems capable of being efficiently solved through hierarchical processing, and control precision and calculation efficiency are both considered.

Hydrogen is produced by electrolysis of water using electricity generated from a renewable energy source such as wind and / or solar radiation, compressed in a multistage compression system and consumed in at least one downstream process. Supply of hydrogen to the downstream process(es) fluctuates with demand and / or the availability of the renewable energy source. In order to accommodate such fluctuations, excess hydrogen is stored during periods when production of hydrogen exceeds that required by the downstream process(es) so that, during periods when demand exceeds production, hydrogen is removed from storage and, after suitable pressure reduction, fed to the downstream process(es) via a stage of the multistage compression system.

A device and a method for producing hydrogen and byproduct oxygen by using green electricity electrolyzed water are provided. The device comprises an oxygen purifying system, a heat exchange system, an air separation compression and expansion system, an air separation rectification system and a liquid oxygen storage system. The method comprises the following steps: first, purifying oxygen prepared by electrolyzing water by green electricity to remove impurities such as hydrogen, carbon monoxide, carbon dioxide and water in the oxygen, then feeding the pure oxygen into the heat exchange system, performing heat exchange liquefaction to obtain liquid oxygen, coupling the liquid oxygen generated by rectification of the air separation rectification system, and obtaining pressurized oxygen through the heat exchange system and the air separation compression and expansion system.

The invention provides a low-rank coal pyrolysis system and a control method thereof. The low-rank coal pyrolysis system comprises a through-flow type rotary dryer, a pyrolysis furnace, a dust remover, a waste heat recovery device, a venturi tower and a purification recovery device, and a dried coal outlet of the through-flow type rotary dryer is connected with a product inlet of the pyrolysis furnace; a raw gas outlet of the pyrolyzing furnace is connected with a gas inlet of the venturi tower through the dust remover and the waste heat recovery device in sequence, a flue gas outlet of the pyrolyzing furnace is communicated with a flue gas recovery port of the cross-flow rotary dryer to recover flue gas to dry raw material coal, and a tower bottom outlet of the venturi tower is connected with the ammonia water purification and recovery device to recover coal tar; and a coal gas outlet of the venturi tower is communicated with the coal gas purification and recovery device. According to the low-rank coal pyrolysis system provided by the invention, on one hand, waste heat of raw gas can be recycled, and on the other hand, raw materials can be conveniently dried, so that the pyrolysis efficiency is improved.

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