1251 results about "Air separation" patented technology

The invention relates to the technical field of air separation plant management, and discloses an air separation plant energy efficiency intelligent management system based on data analysis, which comprises a data acquisition module, an energy efficiency analysis module, an optimization strategy generation module, a real-time adjustment module and a dynamic feedback module. The data acquisition module acquires and stores data in real time in a multi-source heterogeneous manner. The energy efficiency analysis module uses a hybrid convolutional neural network and an adaptive wavelet packet decomposition algorithm to extract features. And the optimization strategy generation module formulates a strategy in combination with deep reinforcement learning and a multi-target particle swarm optimization algorithm. And the real-time adjustment module dynamically adjusts equipment parameters based on fuzzy logic control. And the dynamic feedback module forms closed-loop optimization. The system solves the problem of energy efficiency management of traditional air separation equipment, and can accurately collect and process data, deeply analyze energy efficiency, intelligently generate optimization strategies, accurately adjust parameters in real time and continuously optimize the parameters, improve the energy efficiency of the air separation equipment, reduce energy consumption, enhance the operation stability and reliability of the equipment and assist industrial sustainable development.

The invention relates to a magnetic suspension air separation expansion machine system and an operation method thereof. The system comprises a base, a magnetic suspension bearing assembly, a rotor assembly and a control module. The magnetic suspension bearing assembly is arranged on the base, comprises an expansion end radial magnetic suspension bearing, a brake end radial magnetic suspension bearing and an axial thrust magnetic suspension bearing, and is used for supporting radial and axial forces of the rotor assembly; the rotor assembly is arranged in the machine body and connected with the machine body through the magnetic suspension bearing assembly, and non-contact suspension is achieved. The control module is electrically connected with the magnetic suspension bearing assembly and used for controlling the magnetic suspension bearing assembly to suspend the rotor. The operation method comprises the steps of self-checking before starting, electrifying to suspend the rotor, starting the air compressor to pressurize, adjusting flow to drive the expansion impeller, carrying out split-flow cooling on gas, and collecting data in real time to maintain stable suspension of the rotor. The device has the advantages of high efficiency, stability, energy conservation and the like and is suitable for the field of air separation.

The utility model provides a compound device for providing feed gas for preparing green ammonia from new energy and a green ammonia synthesis system. The composite device comprises a deep cooling air separation nitrogen generation subsystem, a hydrogen supply subsystem and a main heat exchanger, and the hydrogen supply subsystem comprises a water electrolysis hydrogen generation unit, a first hydrogen compressor, a second hydrogen compressor, a hydrogen storage tank and a hydrogen conveying pipeline. The hydrogen conveying pipeline comprises a first hydrogen conveying pipeline, a second hydrogen conveying pipeline and a third hydrogen conveying pipeline; the main heat exchanger is a multi-channel heat exchanger and comprises a first flowing channel used for flowing of a first medium and a second flowing channel used for flowing of a second medium, the second hydrogen compressor is connected with the hydrogen storage tank through the first flowing channel, and the hydrogen storage tank is connected with the third hydrogen conveying pipeline through the second flowing channel. The composite device provided by the utility model can ensure the supply stability of the raw material hydrogen of the ammonia production subsystem, and solves the technical problem that the hydrogen supply is unstable in the existing green ammonia synthesis process.

The invention discloses a diaphragm sorting device for waste lithium battery recycling, and relates to the technical field of diaphragm sorting, the diaphragm sorting device for waste lithium battery recycling comprises a shell, a screening assembly, a winnowing assembly and an adsorption separation assembly.Large particles, medium particles and light materials are screened out through small screen holes, medium screen holes and large screen holes in a screen, and when the screen reciprocates up and down, the large particles and the medium particles are separated; the two symmetrically-arranged baffles are driven by the connecting rod to conduct continuous opening and closing actions, periodic opening and closing are achieved, the opening and closing frequency of the baffles is synchronous with the vibration frequency of the screen, dynamic control over falling materials is formed, it can be ensured that the materials falling every time are single-layer particles, multi-layer accumulation is avoided, and when the single-layer materials fall, the particles are evenly distributed in the vertical direction, and the quality of the particles is improved. Air flow can vertically act on each particle conveniently, the situation that bottom layer particles in multiple layers of materials cannot be effectively separated due to insufficient air flow penetration is avoided, and the screening precision is remarkably improved through linkage control of screen vibration and the baffles.

The utility model relates to the technical field of cleaning, in particular to a dust cup device and cleaning equipment, in the dust cup device, an air inlet gap is formed in the end, close to a partition plate, of an outer pipe, so that during secondary separation, the cyclone separation path of airflow is prolonged, and the dust-air separation effect is improved; and the performance and the user experience of the cleaning equipment are further improved.

The invention relates to the technical field of grading gangue selection of coal gangue, in particular to a grading gangue selection method of coal gangue, which comprises the following steps: acquiring mineral texture data through a multispectral imaging device, analyzing the spatial distribution of aluminum and silicon elements in combination with an X-ray diffractometer, and generating a three-dimensional component map through spatial registration and fusion with infrared heat value data; impurities are dynamically removed through sulfur element spectrum detection, and the air pressure and the material flow of winnowing equipment are adjusted by matching roasting process parameters; components of the sorted waste are analyzed through an X-ray fluorescence spectrometer, particle size data are obtained through a laser particle analyzer, a genetic algorithm is input to iteratively optimize detection channel combination and sampling density, a resource distribution instruction is generated, and equipment parameter correction is fed back. According to the method, aluminum-silicon ratio critical value accurate identification, sorting parameter dynamic adaptation and waste recycling path optimization are realized, and the problem of overburning caused by insufficient quantitative analysis of element distribution in the prior art is solved.

The utility model discloses hydrogen purification equipment and an ammonia production system, and relates to the technical field of hydrogen purification, and the hydrogen purification equipment comprises an air separation device, a hydrogen production device, a heat exchange part and a filtering part; the air separation device is provided with a refrigerant discharge pipe; the hydrogen production device is provided with a hydrogen discharge pipe; the heat exchange part is provided with a refrigerant inlet end, a hydrogen inlet end and a hydrogen outlet end, the refrigerant discharge pipe is communicated with the refrigerant inlet end, the hydrogen discharge pipe is communicated with the hydrogen inlet end, and a refrigerant discharged by the refrigerant discharge pipe and hydrogen discharged by the hydrogen discharge pipe can be subjected to heat exchange; the filter is provided with an inlet end and an outlet end which are mutually communicated; the inlet end is communicated with the hydrogen outlet end; according to the technical scheme, the utilization rate of hydrogen is increased.

The invention relates to the technical field of electric power control, in particular to a low-voltage power supply redundancy switching regulation and control method applied to an air separation system, which is applied to the air separation system comprising at least two independent low-voltage power supply input lines, and an emergency standby power supply is configured as a third redundancy input line. The method includes: acquiring a power state data set of a low-voltage power distribution system in real time; available feature extraction is carried out on the power supply state data set, and available characterization parameters of each input line are obtained; when any one of the available characterization parameters does not accord with a corresponding preset input line available threshold value, judging that the input line is unavailable; otherwise, marking as available; calculating the power redundancy based on the number of the available input lines and the total number of the input lines; in response to the condition that the power redundancy is lower than a preset redundancy threshold value, obtaining a switching decision feature set; and inputting the switching decision feature set into the power supply redundancy control model to obtain an optimal switching parameter set, and carrying out low-voltage power supply redundancy switching control based on the optimal switching parameter set.

The invention provides an improved ammonia production system based on a temperature swing adsorption principle. The improved ammonia production system comprises a water electrolysis hydrogen production module, a deep cooling air separation nitrogen production module, a multi-stage ammonia synthesis tower module and a double-bed circulating adsorption separation ammonia module, the water electrolysis hydrogen production module and the deep cooling air separation nitrogen production module provide raw material gas for the multi-stage ammonia synthesis tower module through a mixer, low-grade waste heat of a multi-stage ammonia synthesis tower serves as a heat source of the double-bed circulating adsorption separation ammonia module, and the double-bed adsorption separation ammonia module is connected with the multi-stage ammonia synthesis tower. The working conditions of an adsorption bed of the double-bed ammonia adsorption and separation module comprise an adsorption working condition and a desorption working condition, the adsorption bed alternately performs the adsorption working condition and the desorption working condition within the operation time, and low-grade waste heat from a multi-stage ammonia synthesis tower is used for driving to perform separation operation on ammonia synthesis gas so as to obtain high-purity ammonia; according to the invention, the operation pressure in an ammonia product separation project can be effectively reduced, circulation is formed, and the purity and the recovery rate of the obtained ammonia product are not reduced while the waste heat in the system is further utilized.

The invention discloses an analysis meter application method based on process requirements of an air separation device, and relates to the technical field of analysis meter application, pressure fluctuation data and accuracy data of different gas sampling are obtained, and the installation positions of different types of analysis meters are determined through fuzzy reasoning; establishing a correlation model for the analyzer with the determined installation position; when an adjacent analyzer triggers a wake-up demand, acoustic characteristics in the air separation device are obtained by using the acoustic sensor array, a prediction model is constructed by combining the acoustic characteristics and the correlation model, and whether the current analyzer needs to be awakened or not is judged through the prediction model; the method comprises the following steps: identifying a change trend of gas characteristics collected by the awakened analyzer by using a time sequence, judging whether sampling parameters of the awakened analyzer need to be adjusted or not according to the change trend, and further outputting the sampling parameters of the awakened analyzer based on a preset parameter adjustment mechanism. Accurate positioning, intelligent linkage and dynamic adjustment based on data driving are achieved, and the detection efficiency and operation stability of the air separation device are improved.

The invention provides a multi-stage identification plastic automatic separation and winnowing electrostatic synergistic separation system and method, and relates to the technical field of solid waste resourceful treatment. The system comprises an intelligent bag breaking and feeding module, a paving and shaping light source enhancing module, an AI identifying and stripping module, a wet material drying module, a negative pressure winnowing module, a high-voltage electrostatic deflection module and a multi-path collecting and outputting module. According to the system, automatic feeding and bag body breaking of household garbage are achieved, plastic materials capable of being recognized are spread to reduce the overlapping rate, efficient classification is conducted through the AI technology, and accurate sorting is conducted through wet drying and electric field electrostatic deflection. The plastic sorting efficiency is effectively improved, and equipment energy consumption and occupied space are reduced.

The utility model relates to a fault diagnosis circuit for an electric heating tube of an electric heater of an air separation unit, the fault diagnosis circuit comprises two current transformers, a light emitting diode and an adjustable resistor, the two current transformers are arranged close to an outgoing line of an electric heating tube bundle, the output ends of the current transformers are respectively connected with the light emitting diode and the adjustable resistor, and the adjustable resistor is connected with the light emitting diode. The light emitting diodes and the adjustable resistors are connected in parallel, the fault diagnosis circuit further comprises a panel, a plurality of fixing holes are formed in the panel in a square array mode, the light emitting diodes and the adjustable resistors are embedded in the fixing holes, and a numbering card is arranged on the panel close to the fixing holes. The electric heating tube bundle is provided with a wiring cover, and a number card is arranged on the wiring cover. According to the utility model, technicians can be helped to quickly judge the faulty tube bundle, so that the troubleshooting time of the electric heating tube is obviously shortened.

A liquefier device which may be a retrofit to an air separation plant or utilized as part of a new design. The flow needed for the liquefier comes from an air separation plant running in a maxim oxygen state, in a stable mode. The three gas flows are low pressure oxygen, low pressure nitrogen, and higher pressure nitrogen. All of the flows are found on the side of the main heat exchanger with a temperature of about 37 degrees Fahrenheit. All of the gases put into the liquefier come out as a subcooled liquid, for storage or return to the air separation plant. This new liquefier does not include a front end electrical compressor, and will take a self-produced liquid nitrogen, pump it up to a runnable 420 PSIG pressure, and with the use of turbines, condensers, flash pots, and multi pass heat exchangers. The liquefier will make liquid from a planned amount of any pure gas oxygen or nitrogen an air separation plant can produce.

A method for providing a nitrogen product, an oxygen product and a hydrogen product, wherein an air separation installation is used which is designed for the low-temperature separation of feed air and which has a rectification column system, the rectification column system comprising an air-fed rectification column and a main heat exchanger. The provision of the nitrogen product comprises, in particular, subjecting feed air to low-temperature rectification using the air-fed rectification column such that a tops gas is obtained, and using part of the tops gas as the nitrogen product. The provision of the oxygen product and the hydrogen product comprises subjecting water to water electrolysis in an electrolyzer, such that a water-containing oxygen stream and a hydrogen stream are obtained, the water-containing oxygen stream or part thereof being subjected, at least in one operating phase, to drying and, in an unmixed state, to liquefaction in the air separation installation.

This disclosure relates to the adsorption and separation of fluid components, such as oxygen, in a feed stream, such as air, using zeolite ITQ-55 as the adsorbent. A process is disclosed for adsorbing oxygen from a feed stream containing oxygen, nitrogen and argon. The process comprises passing the feed stream through a bed of an adsorbent comprising zeolite ITQ-55 to adsorb oxygen from the feed stream, carrying out an equalization step to improve recovery, thereby producing a nitrogen product stream depleted in oxygen as well as a waste stream can be collected to have enriched oxygen. The feed stream is exposed to the zeolite ITQ-55 at effective conditions for performing a rapid cycle of kinetic separation, in which oxygen exhibits greater kinetic selectivity than nitrogen and argon.

The invention relates to the technical field of agricultural separation equipment, in particular to a winnowing separation bin and a hay feed cleaning system.The winnowing separation bin is provided with an obliquely-arranged side wall, so that airflow entering the bin is decelerated firstly and then accelerated, and large materials and materials with the small wind area are different from thin film materials in wind area and inertia, so that the hay feed is separated from the large materials. The large materials and the materials with the small wind area are collected at the discharging opening in the bin bottom, the film materials are discharged through the air outlet, separation of the film materials and straw is completed, the separation efficiency is improved, and the content of mulching films in smashed straw feed is reduced when the device is applied to the field of feed separation. According to the hay feed cleaning system, light materials separated by the winnowing separation bin are fed into the feeding device or the light material treatment device to be further treated and collected, the stability of the separation effect can be improved, waste of the materials is avoided, meanwhile, mulching films are purified to reach the recycling standard, waste is turned into wealth, and two purposes are achieved.

The invention discloses a liquid air energy storage system based on air separation, which is characterized by comprising an air purification unit, an energy storage unit, an air rectification unit and an LNG (Liquefied Natural Gas) cold supply unit, wherein the air purification unit comprises an air filter, an air compressor, a first cooler, an adsorber and a first heater, and the energy storage unit comprises a first liquid separation tank, a liquid air storage tank, a liquid air pump and an air expansion machine. The air rectification unit comprises a rectification tower, a main cold box, a second liquid separation tank, a second subcooler, a first heat exchanger, a liquid nitrogen storage tank, a liquid oxygen storage tank, a second heat exchanger, an argon rectification system and a liquid argon storage tank; and the LNG cold supply unit comprises a first nitrogen supercharger, a second nitrogen supercharger, an LNG cold box and a first subcooler. The system has the functions of air separation and electric energy storage at the same time, and cold energy of the LNG receiving station is fully utilized for air separation and energy storage to participate in construction of a novel power system of a power grid.

The invention relates to the technical field of road engineering, and discloses a construction waste regenerated mixed aggregate grading determination method which comprises the following steps: step 1, construction waste pretreatment and crushing parameter acquisition; the method comprises the following steps: S1, carrying out multi-stage crushing on the construction waste through combined operation of a jaw crusher and an impact crusher, collecting a crushed particle size distribution curve of recycled aggregate, and measuring the proportion of needle-sheet-shaped particles and surface roughness parameters; and S2, metal and light impurities are separated through magnetic separation and winnowing equipment, and it is ensured that the metal residual rate is smaller than 1%, and the wood / plastic residual rate is smaller than 3%. According to the construction waste recycled mixed aggregate grading determination method, a recycled aggregate dynamic grading model is established on the basis of the crushing fractal rule and the maximum compactness theory, grading design precision is remarkably improved, it is ensured that the performance of a mixture is equivalent to that of natural aggregate, and a construction waste resource utilization path is optimized through a grading replacement strategy.

A process and a plant for the production of hydrogen or for the synthesis of ammonia, said process comprising the following steps: (a) performing a reforming process (101) of a hydrocarbon feedstock (1) to generate a raw syngas (2), said reforming process comprising at least an autothermal reforming step (104) in presence of oxygen-enriched air or pure oxygen (3) produced by an air separation unit (ASU; 103); (b) subjecting said raw syngas (2) to a post-treatment (102) providing hydrogen (H2; 4), a CO2-enriched stream (5), and a residual gas (6); said post-treatment comprising at least a water gas shift conversion step (105) of said raw syngas into a shifted syngas (7), a pressure swing absorption step (106), and a cryogenic separation step (107); wherein said pressure swing absorption step produces said hydrogen and a first tail gas (8) comprising carbon monoxide (CO), carbon dioxide (CO2), residual hydrogen (H2) and unreacted hydrocarbon feedstock from the shifted syngas (7), and said cryogenic separation step separates the CO2-enriched stream and a second tail gas (9) from said first tail gas; said post-treatment (102) comprising a further separation step (120) of a CO2-containing stream (11) and of the residual gas (6) from said second tail gas; (c) recycling said residual gas (6) as feed to said reforming process and / or as fuel to one or more fired heater(s) (10) of said process; (d) optionally feeding a portion (4.8) of said hydrogen (4) obtained in step (b) as fuel to one or more fired heater(s) of said process; (e) optionally an ammonia synthesis step (110) wherein said hydrogen (4) and a nitrogen (N2)-containing stream (12) produced by said ASU (103) are reacted in a given stoichiometric ratio and in ammonia (NH3) synthesis conditions to obtain an ammonia-containing product (13).

The invention relates to a strengthening treatment and automatic separation system for construction waste recycled aggregate, and innovatively provides a technical route of'multistage crushing, magnetic separation, winnowing, flotation linkage and aggregate strengthening 'aiming at the core problems of more impurities and low strength of the recycled aggregate. The system comprises a pretreatment module (for removing large impurities), a multi-stage crushing module (for controlling grain shapes), a linkage sorting module (for removing plastics through winnowing, removing wood chips through flotation and carrying out photoelectric precise sorting), an aggregate strengthening module (for improving strength through microwave activation and nanometer coating) and an intelligent control center. By establishing a magnetic separation efficiency model, a grain shape optimization model and a strength prediction algorithm, the aggregate purity is greater than 98% (XRF detection), and the compressive strength is improved by 40% (ISO 679 verification); the energy consumption in the sorting link is reduced by 30%, and the reinforced aggregate can replace natural aggregate to prepare C40 concrete. The bottleneck of high-value utilization of the construction waste is broken through, and circular economy development is promoted.

The wind power mineral separator comprises a supporting frame, a winnowing cavity, a wind cavity and a circulating wind pipe, the winnowing cavity is installed on the supporting frame, the interior of the winnowing cavity is hollow, a feeding hopper is arranged on the top of the winnowing cavity, and a sand discharging opening and an opening are formed in the bottom of the winnowing cavity; the air cavity is installed on the supporting frame, the interior of the air cavity is hollow, a fan is rotationally arranged in the air cavity, and one end of the air cavity communicates with the winnowing cavity; air flow blows passing minerals when passing through the winnowing chamber, and according to the principle that different specific gravities are different and transverse moving distances are different when the air flow is blown by uniform-speed equal-quantity air, different minerals finally have different falling points on a material plate, so that separation is achieved, and meanwhile dust blown by the air flow is separated by the air flow. Heavy gravels and the like are discharged from the sand discharge port, and light dust flows back into the air cavity from the circulating air pipe along with airflow, so that the dust circulates in the device, and the dust is prevented from rising.

The invention discloses an air separation pressure swing intelligent adsorption pollution discharge method, system and device combined with a pressure curve, and relates to the technical field of intelligent pollution discharge. The air separation pressure swing intelligent adsorption pollution discharge method, system and device combined with the pressure curve comprises the following steps: S1, collecting running state data in real time, and preprocessing the running state data; s2, performing pressure disturbance intensity analysis on the operation state data; s3, performing real-time analysis and feature extraction on the pressure curve; s4, performing start-stop risk prediction on the operation state data; and S5, integrating the operation state data, the pressure disturbance intensity analysis result and the start-stop risk prediction result to execute a pollution discharge control instruction. The problems that an air compressor and a pressure swing adsorption system lack linkage control based on pressure change, pollution discharge easily causes pressure fluctuation and frequent starting and stopping, energy consumption is increased, equipment abrasion is caused, and an existing control mode lacks a feedforward adjusting mechanism are solved.

The invention relates to the technical field of air separation production line health scoring, and provides an air separation production line health scoring method based on a multivariate heterogeneous model, and the method comprises the steps: S1, collecting the state data, working condition data and process data of an air separation production line; s2, in order to prevent the influence of abnormal data on the model construction of the system, carrying out abnormal value preprocessing on the collected data; s3, based on the preprocessed data, performing multi-dimensional early warning through adaptive threshold early warning, trend early warning and AI early warning; s4, after parameters in the air separation production line equipment trigger early warning, fault diagnosis is carried out only for rotary equipment and only in the vibration parameter or temperature parameter early warning scene of the bearing of the equipment; and S5, respectively calculating scores of the threshold model, the trend model, the A model and the mechanism model, and calculating a total health degree score of the system through weight configuration. The health management system for the space division industry is provided, and the overall operation condition of a production line can be effectively evaluated.

The utility model discloses a liquid air energy storage system coupled with air separation and dry ice preparation, which comprises an air compression liquefaction subsystem, a cold energy gradient utilization subsystem, an air expansion power generation subsystem and a heat storage subsystem, the air compression and liquefaction subsystem, the cold energy gradient utilization subsystem and the expansion power generation subsystem are sequentially connected through a compression and liquefaction pipeline and an expansion power generation pipeline, and the heat storage subsystem is connected with the air compression and liquefaction subsystem and the air expansion power generation subsystem through a heat storage circulation pipeline. The cold energy gradient utilization subsystem is arranged to replace an existing low-temperature cold storage unit, the liquid air energy storage system is coupled with the air separation unit and the dry ice preparation unit, liquid air cold energy gradient utilization is achieved, and meanwhile energy consumption and construction cost of the air separation system are reduced. The power generation stability of the liquid air energy storage system is guaranteed, and the comprehensive efficiency and the environmental protection property of the liquid air energy storage system are improved.

The invention provides a high-efficiency and low-energy-consumption carbon capture system used before combustion of an LNG (Liquefied Natural Gas) or methanol fuel ship, which comprises an air separation device, a gas generator, a shift reactor, an on-board boiler, an absorption tower, a heat exchange system, a desorption tower, a CO2 storage tank, a hydrogen fuel cell, a waste heat recovery device, a steam turbine and a condenser, a membrane separation module is arranged at the top or the upper half part of the absorption tower, is connected with the absorption tower body through a pipeline and is used for realizing separation and purification of hydrogen. According to the system, on one hand, energy consumption can be reduced through effective waste heat management, and on the other hand, CO2 and H2 are effectively separated through a separation and purification technology, so that high-purity CO2 and H2 are obtained and are conveniently stored and supplied to a hydrogen fuel cell.

The invention belongs to the technical field of ore screening, and discloses a semantic segmentation-based layered vibrating screen undersize particle size detection system and a semantic segmentation-based layered vibrating screen undersize particle size detection method. The material weighing device comprises a weighing belt arranged below the vibrating screen, a first driving motor connected with the weighing belt and a first bracket connected with the weighing belt and the first driving motor; the material detection device comprises a detection belt collinear with the weighing belt, a second driving motor connected with the detection belt, and a light supplementing lamp and an industrial camera which are arranged above the detection belt; the detection belt and the second driving motor are supported by a second bracket; the industrial camera faces the detection belt, and the processor is connected with the industrial camera, the second driving motor and the first driving motor. The online detection system disclosed by the invention integrates the functions of image acquisition, weighing measurement, winnowing dust removal and the like, and has the characteristics of compact structure and complete functions.

The utility model belongs to the technical field of oxygen production, and particularly relates to high-purity oxygen extraction equipment which comprises an upper rectifying tower, a condensation evaporator is mounted at the bottom of the upper rectifying tower; the upper rectifying tower is sequentially connected with a high-purity oxygen tower and a lower rectifying tower; the side wall of the condensing evaporator is connected with the top of the lower rectifying tower; a high-purity oxygen evaporator is mounted at the bottom of the high-purity oxygen tower; the bottom of the lower rectifying tower is connected with a lower tower throttle valve; the other end of the lower tower throttle valve is connected with the side wall of the upper tower of the rectifying tower; the bottom of the upper rectifying tower is connected with an upper tower throttle valve; the other end of the upper tower throttle valve is connected with the side wall of the high-purity oxygen tower; the whole equipment is simple and convenient to operate and does not need to be limited by large-scale air separation equipment, and the used equipment is commonly used by crystalline silicon manufacturers, so that the crystalline silicon manufacturers do not need to additionally purchase equipment, the equipment investment of the factories is further reduced, and the production cost is reduced.

The invention relates to the technical field of air separation, in particular to a pretreatment module of an air separation system, a high-purity air separation system and a control method.The pretreatment module comprises a precooling unit, and the precooling unit is connected with a cold source; the pre-cooling unit enables cooling water to circularly flow in the supercharging unit through a cooling water pipeline, and the supercharging unit comprises a first air compressor, a second air compressor, a high-temperature expansion machine supercharging end, a first supercharger after-cooler, a low-temperature expansion machine supercharging end and a second supercharger after-cooler which are sequentially connected in series through a main pipeline; supercharged and precooled air is expanded and cooled by the expansion unit and then enters the heat exchange unit; through the arrangement of the pre-cooling unit, the inlet and outlet temperatures of the high-temperature expansion machine and the low-temperature expansion machine are effectively controlled, reheated air returns to the air compressor, the expansion gas amount is increased, reheated gas continuously cools the air participating in rectification in the heat exchange unit, and in conclusion, the production energy consumption of a high-purity liquefied gas product is reduced.

The internal compression air separation coupling liquid-air energy storage system comprises an air compressor, an air supercharger and an expansion machine which are sequentially connected in series, and further comprises a lower tower, and the expansion machine is further connected with a first gaseous inlet of the lower tower in series; the main heat exchanger and the liquid-air-liquid separator are sequentially connected in series, the other outlet of the compressor and the other outlet of the air supercharger are both connected with an inlet of the main heat exchanger, and a gas outlet and a first liquid outlet of the liquid-air-liquid separator are connected with a second gas inlet and a liquid inlet of the lower tower respectively; the liquid-air energy storage inlet valve, the liquid-air storage tank, the liquid-air low-temperature pump and the liquid-air energy storage outlet valve are sequentially connected with a second liquid outlet of the air-liquid separator in series, and the liquid-air energy storage outlet valve is circularly connected with an inlet of the air-liquid separator. The whole system does not need to be started frequently during operation, continuous operation can be achieved, meanwhile, the storage efficiency reaches 95%, and losses are greatly reduced.

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.