1226 results about "Liquefaction" patented technology

The invention provides a geotechnical engineering earthquake sand liquefaction discrimination method and system, and relates to the technical field of geotechnical engineering, and the method comprises the steps: collecting site basic data (a site parameter table, earthquake acceleration and pore pressure time history data); establishing a preliminary numerical model and applying boundary conditions to correct the preliminary numerical model into a complete numerical model; the pore pressure ratio and the shear strain distribution are obtained through nonlinear dynamic analysis, and the liquefaction risk is comprehensively evaluated; a key soil layer observation scheme is made according to the prediction result, field verification is carried out, and a final judgment result is obtained by combining actual measurement and numerical simulation. According to the method, numerical analysis and actual measurement data are combined, the sand liquefaction risk is rapidly and accurately evaluated, and field testing and observation are guided.

The invention discloses an ocean temperature difference coupled offshore constant-pressure compressed carbon dioxide energy storage system and method, and relates to the technical field of compressed gas energy storage. The system comprises a working medium constant-pressure storage device, a carbon dioxide energy storage circulation loop, a carbon dioxide energy release circulation loop and a heat storage circulation loop. Gaseous carbon dioxide is condensed into a liquid state by utilizing deep sea low-temperature seawater in an energy storage stage, liquid carbon dioxide is evaporated into a gaseous state by utilizing shallow sea high-temperature seawater in an energy release stage, and gas-liquid conversion of carbon dioxide is realized by fully utilizing ocean new energy and ocean temperature difference; the flexible working medium constant-pressure storage device is used for storing low-pressure gaseous carbon dioxide and high-pressure liquid carbon dioxide, the constant pressure of the working medium constant-pressure storage device in the charging and discharging process can be guaranteed, and efficient and stable operation of the system is achieved. Efficient liquefaction and high-density storage of high-pressure carbon dioxide are achieved through the ocean temperature difference and seawater static pressure, the efficiency and energy density of the energy storage system are improved, and deep development of offshore resources is achieved.

The invention relates to the technical field of supercritical compressed carbon dioxide energy storage, in particular to an adiabatic supercritical compressed carbon dioxide energy storage system. An expansion unit; during energy storage, the heat storage tank stores compression heat of the supercritical carbon dioxide in the high-temperature and high-pressure state, and the supercritical carbon dioxide in the high-temperature and high-pressure state is cooled to the temperature the same as that of the high-pressure gas storage chamber; during energy release, the heat storage tank heats the low-temperature high-pressure supercritical carbon dioxide discharged from the high-pressure gas storage chamber; the temperature control system adjusts the flow of the cooling medium in the second heat exchanger, controls the inlet temperature of the compressor and further adjusts the inlet temperature of each stage of expansion machine, it is guaranteed that the carbon dioxide temperature of the inlet position of each stage of expansion machine is not lower than the liquefaction critical temperature, and the large-area liquefaction phenomenon does not occur. According to the temperature control system, the phenomenon that in the prior art, when carbon dioxide is at low temperature, carbon dioxide is liquefied, and large-area condensation occurs in the expansion machine can be effectively overcome, and then the operation efficiency and the energy storage efficiency of the system are guaranteed.

The invention provides a method and system for estimating the vertical bearing capacity of a steel pipe pile, and relates to the technical field of pile foundation engineering.The method comprises the steps that a static cone penetration test is conducted on a seabed stratum needing to be arranged for a steel pipe pile foundation, experimental data are obtained and subjected to normalization processing, soil behavior types are divided, and soil layer mechanical parameters are inverted; calculating side friction resistance and end resistance of the steel pipe pile based on the soil layer mechanical parameters to obtain initial static ultimate bearing capacity; historical equivalent cyclic load experimental data of waves in the construction sea area are obtained, an equivalent cyclic load reduction coefficient, a liquefaction reduction coefficient and a time-varying corrosion reduction coefficient are constructed, and a comprehensive time-varying reduction coefficient is constructed; the initial static ultimate bearing capacity is corrected based on the comprehensive time-varying reduction coefficient, the vertical bearing capacity of the steel pipe pile in the long-term service period is predicted, and the time-varying ultimate bearing capacity is obtained; setting an evaluation threshold according to the time-varying ultimate bearing capacity, dynamically adjusting a bearing capacity grading threshold interval, and outputting a bearing capacity grading evaluation result.

The invention relates to the field of liquid air energy storage, and discloses a liquid air energy storage and liquefied natural gas coupling efficient power generation device and method. The method comprises the steps that an air liquefaction circulation loop purifies, compresses and cools ambient air and then expands and decompresses the ambient air to obtain liquid air, and the liquid air is transmitted to an air power generation circulation loop; generated air compression heat is stored in the heat storage unit; the air power generation circulation loop generates power through expansion of received liquid air, and generated cold energy is stored in a cold storage unit; the LNG vaporization supply loop pressurizes, evaporates and gasifies liquefied natural gas and then supplies the liquefied natural gas to a user side, generated cold energy is stored in a cold storage unit or directly supplied to the air liquefaction circulation loop, and meanwhile gaseous natural gas naturally released by an LNG tank is collected and conveyed to a combustion chamber. The high-grade heat energy utilization loop conducts heat conduction oil circulation, low-grade heat energy and high-grade natural gas combustion heat energy of the heat storage unit are recycled in sequence, high-grade heat energy is transmitted to the air power generation circulation loop, and heat conduction oil returns to the initial state to continue circulation after releasing the heat energy.

The invention relates to the technical field of compressed carbon dioxide energy storage, and discloses a liquid compressed carbon dioxide energy storage system and method. The system comprises a carbon dioxide circulation system, and the circulation system comprises a first liquid storage tank (1), a first evaporation unit (100), an energy storage unit (200), a second liquid storage tank (6), a second evaporation unit (300), an energy release unit (400) and a condensation unit (500) which are communicated in sequence. According to the system provided by the invention, a liquid compressed carbon dioxide circulating system is deeply coupled with waste heat and waste cold in an ethylene process, so that the problems of a gasification heat source of liquid carbon dioxide on a high-pressure side and a liquefaction cold source of gaseous carbon dioxide on a low-pressure side of a pressure storage system are solved; the bottleneck constraint of heat energy utilization of the conventional adiabatic compression carbon dioxide energy storage system is broken through; elastic distribution of compression heat between industrial steam production and carbon dioxide overheating can be achieved.

The utility model relates to the technical field of heat pump rectification, and particularly discloses a heat pump rectification system which comprises a rectification tower; the tower top gas liquefaction system comprises a compressor connected with a gas phase at the top of the rectifying tower, and a reboiler, a throttling device, a condenser and a flow divider which are sequentially connected with the compressor; liquid phase connection at the bottom of the rectifying tower is communicated with the reboiler, the tower bottom reboiling system comprises an auxiliary reboiler and a flash evaporator which are sequentially communicated with the reboiler, and the flash evaporator is communicated to the rectifying tower; and the gas phase at the top of the rectifying tower is heated by the compressor and then enters the reboiler to exchange heat with the liquid phase at the bottom of the rectifying tower, so that the rectifying energy consumption can be reduced, and the energy-saving effect is achieved.

A system and method for liquefying a hydrogen gas feed stream uses a pre-cooling refrigerant for pre-cooling the feed stream, where the pre-cooling refrigerant is compressed, cooled and then separated to provide high pressure mixed refrigerant vapor and liquid streams. The high pressure vapor stream is cooled and directed to a cold vapor separator where cold separator liquid and vapor streams are formed. The cold separator vapor stream is cooled and expanded to provide a pre-cool refrigeration stream in a heat exchanger system. The high pressure pre-cooling refrigerant liquid and cold separator liquid streams are cooled and expanded and directed to the pre-cool refrigeration stream. A high pressure primary refrigerant steam, after compression and cooling, is further cooled in the heat exchanger system and then expanded using warm and cold expanders, with the resulting expanded primary refrigerant streams used to liquefy the pre-cooled hydrogen feed stream via heat exchange in the heat exchanger system.

The utility model discloses a liquid air energy storage system coupled with LNG (Liquefied Natural Gas) cold energy. The liquid air energy storage system comprises an air compression unit, an air purification unit, an air liquefaction unit, a liquid air storage unit, a liquid air boosting gasification unit, an air expansion power generation unit and an LNG cold storage and nitrogen heat exchange unit, the LNG cold storage and nitrogen heat exchange unit uses nitrogen as a circulating medium to absorb the cold energy of the low-temperature end of LNG in the energy storage process to provide cold energy for air liquefaction of the air liquefaction unit, and in the energy release process, the cold energy of the low-temperature end of the LNG is used for pre-cooling compressed air extracted by an expansion machine of the air expansion power generation unit through low-temperature nitrogen. The pre-cooled compressed air is re-liquefied and stored by adopting a process technology for recovering the cooling capacity of an evaporator of a liquid air boosting gasification unit; the LNG cold storage and nitrogen heat exchange unit uses an ethylene glycol aqueous solution as a circulating coolant to absorb the cold energy of the LNG high-temperature end for cooling system equipment. The device is low in power consumption and high in liquefaction rate and electricity-electricity energy storage efficiency after air throttling.

The invention relates to the technical field of component detection, and discloses a carbon dioxide monitoring method and system for an offshore FPSO power station heat pump. The method comprises the following steps: performing component analysis and heat exchange treatment on the FPSO power station flue gas to obtain pretreated flue gas and pretreatment parameters, and performing component detection and water washing purification to obtain first clean flue gas and first treatment data; performing temperature field analysis and absorption monitoring on the first clean flue gas to obtain second clean flue gas, amine-rich liquid and second processing data; performing mass transfer detection and deep absorption on the second clean flue gas to obtain third clean flue gas, a first lean amine solution and absorption parameters; performing energy analysis and regeneration treatment on the rich amine solution to obtain carbon dioxide gas, a second lean amine solution and regeneration parameters; and performing purity analysis and liquefaction treatment on the carbon dioxide gas to obtain liquid carbon dioxide and quality parameters. According to the invention, the efficiency and accuracy of carbon dioxide monitoring for the heat pump of the offshore FPSO power station are improved.

The utility model provides a carbon dioxide liquefaction system, a liquid cargo system and a carbon dioxide capture system, and belongs to the technical field of carbon capture. Wherein the liquefying system comprises a compression device, a liquefying device and a storage tank device, the storage tank device receives liquid carbon dioxide output by the liquefying device through a second liquid inlet end and outputs gaseous carbon dioxide in the storage tank device into the compression device, and the compression device recompresses the gaseous carbon dioxide output by the storage tank device and outputs the compressed gaseous carbon dioxide into the storage tank device. Then liquefying by the liquefying device, and inputting into the storage tank device for storage; the gaseous carbon dioxide in the storage tank device is compressed and liquefied into the liquid carbon dioxide again, and the problems that in the liquid carbon dioxide storage process of the storage tank, part of the liquid carbon dioxide in the storage tank is gasified into the gaseous carbon dioxide, loss of the liquid carbon dioxide is caused, and then the liquefaction efficiency of the carbon dioxide is reduced are solved; the loss of liquid carbon dioxide is avoided.

The present disclosure relates to a carbon dioxide capture apparatus and process combined with biogas upgrading, and there is provided the carbon dioxide capture apparatus combined with biogas upgrading for simultaneously obtaining high purity methane and carbon dioxide, and improving separation efficiency without an additional process by making use of gas streams after a liquefaction process, and recovering cold heat in the process.

The utility model relates to a gas outlet structure and a horizontal carbonization and graphitization integrated furnace. The air outlet structure comprises a reaction furnace shell, a reaction main body and an air outlet assembly, wherein the reaction main body is arranged in the reaction furnace shell; the air outlet assembly comprises a plurality of air outlet pipes, a connecting pipe and a heat preservation layer, one end of each air outlet pipe is located in the reaction main body, the other end penetrates through the reaction main body and the reaction furnace shell to the outside, and the connecting pipe is communicated with the outside end of each air outlet pipe; the part, positioned outside the reaction furnace shell, of each air outlet pipe is coated with a thermal insulation layer; according to the carbonization and graphitization integrated furnace, a plurality of air outlets are formed by designing a plurality of air outlet pipes, so that the exhaust area of the carbonization and graphitization integrated furnace is increased, tar and other gases can be efficiently and stably exhausted, and the tar is prevented from being accumulated in the furnace or a pipeline; in addition, the outer side of the air outlet pipe is wrapped with the heat preservation layer, the temperature in the air outlet pipe can be effectively reduced, tar liquefaction is prevented, and it is guaranteed that gas is smoothly exhausted.

The invention discloses a solid-phase and liquid-phase double-coupled liquid air energy storage and cold storage system. Comprising an air liquefaction storage module used for cooling, liquefying and storing compressed air, a liquid phase cold storage / release module used for storing and releasing high-quality cooling capacity of liquid air, and a solid phase cold storage / release module used for storing and releasing medium-low-quality cooling capacity of the liquid air. The liquid phase cold storage / release module and the solid phase cold storage / release module are connected to the rear end of the air liquefaction storage module in series, and heat exchange is conducted between the liquid phase cold storage / release module and the air liquefaction storage module and between the solid phase cold storage / release module and the air liquefaction storage module. And an outlet pipeline of the solid-phase cold storage / release module is connected to the heater. High-quality cooling capacity in the power generation process of the liquid air energy storage system is stored in a liquid-phase cold storage mode, medium-low-quality cooling capacity in the power generation process of the liquid air energy storage system is stored in a solid-phase cold storage mode, the defect of large exergy loss caused by solid-phase cold storage is overcome, and the cold storage efficiency of the energy storage system is improved.

A combined cycle power generation and storage system is shown. A liquid air energy storage system uses excess power to liquefy air and stores it in a liquid state. A combustion engine produces power by combustion of a carbon-based fuel along with an exhaust stream containing carbon dioxide. A heat recovery system exchanges heat from the exhaust stream to air from the liquid air storage system, and thereby produce a cooled exhaust stream and heated air. An air expansion machine recovers power by expansion of heated air from the heat recovery system. A separation system separates carbon dioxide from ambient air prior to liquefaction during operation of the liquid air energy storage system, and separates carbon dioxide from the cooled exhaust stream during operation of the combustion engine prior to emission of the cooled exhaust stream to atmosphere.

The invention relates to the technical field of carbon dioxide trapping, in particular to a two-stage rotating wheel adsorption device and method for trapping carbon dioxide in flue gas, the two-stage rotating wheel adsorption device comprises a spray tower, a refrigerating unit, a dehumidification rotating wheel, a carbon trapping rotating wheel, a multi-stage compressor, a refrigerating and liquefying device, a CO2 storage tank and a flue gas fan, the implementation process of the carbon capture device comprises the steps that flue gas is introduced by a flue gas fan, firstly, the flue gas is cooled and dehumidified through a spray tower and a cooler, then the flue gas is dehumidified through a dehumidification rotating wheel, carbon capture is conducted through a carbon capture rotating wheel, and finally high-purity CO2 liquid is conveyed into a CO2 storage tank through a compressor and a refrigeration liquefaction device. The device has the characteristics of low desorption energy consumption, low gas circulation piezoresistance, continuous process and high heat recovery rate, the concentration of enriched CO2 is increased, the concentration of CO2 in flue gas after the carbon capture runner is relatively low, and the unit CO2 capture energy consumption can be greatly reduced while the CO2 removal rate and the enrichment concentration are ensured.

The invention provides a flash steam pressurization gas supply and reliquefaction circulation combined system and a liquid cargo ship. The combined system comprises a first heat exchanger, a second heat exchanger, a multi-stage compression device, a reliquefaction pipeline and a gas-liquid separation module, and flash steam is input into the first side of the first heat exchanger. The main inlet of the compression device is connected with the first side of the first heat exchanger. And a liquid return opening is formed in the pipeline before the last-stage compression in the compression device. And an outlet of the reliquefaction pipeline is connected with a second side inlet of the first heat exchanger and a first side inlet of the second heat exchanger through parallel connection of first and second pipelines. The second side of the first heat exchanger and the first side outlet of the second heat exchanger are connected with the liquid inlet of the gas-liquid separation module, the liquid outlet is connected with the liquid cargo tank, and at least part of gas discharged from the gas outlet is sent to the pipeline before the first-stage compression and after the first-stage compression of the liquid return port through the second side of the second heat exchanger. High-pressure gas supply and flash steam medium-pressure reliquefaction are achieved, energy consumption is reduced, and the reliquefaction capacity is improved.

The invention relates to the technical field of carbon capture, in particular to a capture system and process for treating carbon dioxide in flue gas. The trapping system comprises a trapping unit which is provided with gas-liquid mass transfer equipment, a regeneration tower and a solution circularly flowing between the gas-liquid mass transfer equipment and the regeneration tower and is used for absorbing and desorbing carbon dioxide; the liquefaction unit is communicated with the regeneration tower and is used for compressing, drying and liquefying the carbon dioxide discharged from the regeneration tower; wherein the solution has two states: carbon dioxide is absorbed in the gas-liquid mass transfer equipment to form a rich solution, and the carbon dioxide is desorbed in the regeneration tower to form a barren solution; the trapping unit is provided with a process module for treating a solution, and the gas-liquid mass transfer equipment is communicated with the regeneration tower through the process module. In the invention, through the process module, the heat exchange efficiency of the trapping system is greatly optimized, the energy consumption required by rich liquid regeneration is reduced, and the size of equipment in the trapping system is greatly reduced.

The BOG reliquefaction system of the LNG storage tank comprises the LNG storage tank and a heat exchanger arranged side by side with the LNG storage tank, and a first conveying pipe for outputting to the heat exchanger is arranged at the top end of the LNG storage tank; the rewarming heat exchange piece is arranged on one side of the heat exchanger to adjust the BOG temperature, and the rewarming heat exchange piece communicates with the interior of the heat exchanger; the BOG compressor is arranged at the lower end of the rewarming heat exchange piece so as to pressurize BOG; by arranging the heat exchanger, the rewarming heat exchange piece, the BOG compressor, the refrigerant assembly and the pressure adjusting assembly, the pressure in the LNG storage tank can be adjusted conveniently, the storage safety is guaranteed, gas and liquid phase refrigerants are separated in the gas-liquid separator and used for different purposes respectively, and therefore the system energy utilization rate is increased, the pressure of the gas phase space at the top of the LNG storage tank is controlled by arranging the pressure adjusting assembly, and the system energy utilization rate is increased. And the pressure difference is reduced through a throttling valve and other devices, and pressure balance and safe operation of the system in the BOG reliquefaction process are ensured.

The invention discloses a normal-temperature natural gas helium extraction and purification system and purification method. The system comprises a first-stage membrane separator, a second-stage membrane separator, a third-stage membrane separator, a pressure swing adsorption unit and the like, helium in natural gas is primarily concentrated through the first-stage membrane separator, after impurities are removed, the natural gas enters the third-stage membrane separator to be further concentrated, and permeated gas enters the second-stage first-section membrane separator to be concentrated to be high in concentration; the helium content in the impermeable gas is extremely low, and the impermeable gas returns to a pipe network; the permeated gas of the second-stage first-section membrane separator enters a fine dehydrogenation unit and a pressure swing adsorption unit, and then high-purity helium is produced; the impermeable gas of the second-stage first-section membrane separator enters the second-stage second-section membrane separator and then returns to the system for circulation; the impermeable gas of the second-stage second-section membrane separator returns to the third-stage membrane separator for recycling; and desorbed gas of the pressure swing adsorption unit returns to an outlet of the first-stage membrane separator for circulation. According to the system, helium in natural gas is purified by adopting very low energy consumption, helium in boil off gas (BOG) in the natural gas liquefaction process can also be purified, and a very good application effect is achieved.

The invention relates to the technical field of oil gas recovery, and discloses a variable-flow-direction cold-carrying circulation oil gas recovery system which comprises a variable-flow-direction oil gas cooling liquefaction recovery subsystem and a cold-carrying circulation heat recovery subsystem. The variable-flow-direction oil gas cooling, liquefying and recycling subsystem comprises a first-stage cooling module, a second-stage cooling module, a third-stage cooling module and a fourth-stage heating module which are sequentially communicated through oil gas connecting pipes; the secondary refrigerant circulation heat recovery subsystem comprises a first-stage oil gas condenser A, a first-stage oil gas condenser B, a first secondary refrigerant valve, a second secondary refrigerant valve, a secondary refrigerant pump, a fourth-stage oil gas heater, a third secondary refrigerant valve and a fourth secondary refrigerant valve. The flow-direction-variable cold-carrying circulation oil gas recovery system has the advantages of being low in energy consumption, energy-saving, environment-friendly, simple in refrigerating system, low in cost, high in reliability and the like, and the energy-saving and environment-friendly performance, the cost performance and the operation reliability of the oil gas recovery system are greatly improved.

The invention relates to the technical field of liquid air energy storage, in particular to a high-heat-storage-density liquid air energy storage system and method.The system comprises an air compression unit, an air liquefaction unit, a liquid air gasification unit, a cold storage unit, a heat storage unit and an air expansion power generation unit; the first input end of the air compression unit is used for inputting ambient air, the second input end of the air compression unit is used for inputting electric power, the first output end of the air compression unit is connected with the first input end of the air liquefaction unit, and the second output end of the air compression unit is connected with the first input end of the heat storage unit. The third input end of the air compression unit is connected with the first output end of the heat storage unit. By optimizing the heat storage density and the compression heat utilization and combining the cascade heat utilization and refrigeration technology, the circulation efficiency and the power generation performance of the liquid air energy storage system are improved, and a more efficient solution is provided for practical application of the liquid air energy storage technology.

The invention relates to the technical field of energy storage, and discloses a liquefied air energy storage system which comprises an air compression unit, an air liquefaction storage unit, a liquid air gasification unit and a cold storage unit. According to the liquefied air energy storage system provided by the scheme, air is stored in the form of liquid air, so that the problem of low energy storage density of compressed air can be solved. Moreover, according to the liquefied air energy storage system provided by the scheme, air is stored in the form of normal-pressure liquid air without depending on special geographical conditions and a large number of high-pressure containers and pipelines, and the cost is low.

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

The invention discloses a waste slag storage yard slope stability evaluation and analysis method considering material static liquefaction instability, and the method comprises the steps: obtaining related mechanical parameters of a waste slag storage yard slope with a potential liquefaction region; constructing an elastic-plastic constitutive model, and carrying out iterative calculation on the elastic-plastic constitutive model into which the related mechanical parameters are substituted through an optimization algorithm to obtain optimal simulation parameters; determining a critical state line and an unstable line in a stress space according to the optimal simulation parameters and related mechanical parameters; analyzing the side slope of the waste slag storage yard through a strip division method and an effective stress analysis method to obtain effective stress states of related points on different slip planes; according to the critical state line and the unstable line in the stress space, the effective stress state of each point in the side slope is used for static liquefaction instability possibility judgment, and then the potential liquefaction instability area of the side slope is obtained; and according to the potential liquefaction instability area of the side slope, the waste slag storage yard side slope with the potential liquefaction area is evaluated, so that the safety coefficient of the waste slag storage yard side slope considering the static liquefaction instability characteristic of the material is obtained.

The invention relates to the technical field of flue gas treatment, in particular to a carbon capture and storage system and a carbon capture and storage method.The carbon capture and storage system comprises a waste gas absorption unit, an amine liquid circulation unit, a carbon dioxide gas salinization unit and a carbon sequestration unit which are communicated in sequence; the system further comprises a limestone slurry pulping and filling unit; and the limestone slurry pulping and filling unit is communicated with the carbon dioxide gas salinization unit. The carbon capture and storage method is a brand-new organic amine decarburization and permanent carbon sequestration method provided on the basis of the principle of enhancing rock weathering; compared with a traditional carbon sequestration method that carbon dioxide is transported through compression and liquefaction and stored in an underground salt water layer, the method has the advantages that the carbon capturing and storing process is short, high-pressure and low-temperature high-energy-consumption equipment does not need to be used, the captured carbon dioxide gas does not need to be stored and transported at low temperature, energy consumption can be reduced, the carbon sequestration cost is saved, and the carbon sequestration efficiency is improved. The carbon dioxide escape phenomenon in the storage and transportation process can be avoided, and the carbon sequestration efficiency is improved.

The invention discloses an oil gas treatment method and system based on pressure triggering and temperature feedback control, a medium and a product, and relates to the field of oil gas treatment. The method comprises the following steps: when a pressure value and an actual temperature of an oil tank meet trigger conditions, guiding oil gas in the oil tank into a condensation unit for condensation, liquefying preset high-boiling-point components in the oil gas into a liquid oil product, and adsorbing the condensed residual oil gas through a double-layer adsorption bed arranged in an adsorption tank in sequence; according to the temperature of the adsorption bed and the tail gas emission concentration, the saturation index is calculated through a composite saturation judgment algorithm, when adsorption is saturated, the vacuum pump is started to conduct vacuum desorption on the adsorption tank, oil gas adsorbed on the double-layer adsorption bed is desorbed, and the desorbed oil gas is circularly sent back to an inlet of the condensation unit to be subjected to secondary condensation liquefaction recovery. By implementing the technical scheme, oil gas can be effectively treated, and the oil gas recovery efficiency is improved.

The invention provides an oil shale supercritical CO2 fracturing and in-situ conversion integrated device and a working method, belongs to the technical field of oil shale exploitation, and realizes efficient cooperation of supercritical CO2 fracturing and in-situ conversion by integrating a CO2 liquefaction storage system, a fracturing heating system, a stratum simulation system and a data monitoring system. The device comprises a CO2 liquefying and storing system, a CO2 liquefying and storing system, a CO2 liquid storage system, a CO2 liquid storage system and a CO2 liquid storage system, the oil shale fracturing and heating system is used for fracturing the rock core under the simulated formation confining pressure condition and triggering the oil shale in-situ cracking reaction through medium-frequency heating; the oil shale fracturing model is used for simulating an underground fracturing environment and guiding crack propagation; the data monitoring system collects temperature and pressure parameters in real time to optimize process regulation and control. The fracturing process and the conversion process are innovatively coupled, the supercritical CO2 has the characteristics of a fracturing medium, a heat transfer carrier and a reaction medium, the energy utilization rate and the CO2 circulation efficiency are remarkably improved, and the oil shale recovery rate is increased.

Provided are a micro-scale apparatus and method for liquefying natural gas The apparatus comprises a first heat exchanger that cools a natural gas feed stream by heat exchange with a first cooling fluid from a chiller, a compressor configured to compress the cooled natural gas, an air cooler configured to further cool the compressed natural gas, a second heat exchanger configured to further cool the natural gas by heat exchange with a second cooling fluid, a third heat exchanger configured to further cool the cooled natural gas, a joule-thompson (JT) valve configured to cool the flow of cooled natural gas to create LNG, a separator configured to separate a liquified LNG from a vapour phase, and a return flow path connected to the natural gas inlet, wherein the return flow path is optionally configured to pass as cooling medium via the third heat exchanger, wherein optionally the return flow path is configured to transport the vapour phase from the separator via the third heat exchanger for heating by heat exchange a gas flow entering the inlet of the third heat exchanger, and to combine the heated vapour phase with the natural gas feed stream.

According to the carbon dioxide energy storage coupling carbon capture system, during energy storage, carbon dioxide discharged by the carbon capture system passes through a multi-stage compression cooling assembly in an energy storage pipeline, so that the carbon dioxide is in a high-pressure supercritical state and enters a high-pressure carbon dioxide storage tank to be stored. During energy release, the carbon dioxide is heated and expanded when passing through the multi-stage expansion heating assembly in the energy release pipeline. Expansion acting can be used for power generation. And the expanded carbon dioxide enters the LNG heat exchange system to be liquefied, and the carbon dioxide enters the liquid carbon dioxide storage tank after being cooled and liquefied. The heat conduction pipeline is used for conducting heat exchange in the energy storage and release process. According to the carbon dioxide energy storage coupling carbon capture system, redundant electric quantity can be stored in the energy storage process, energy release and power generation can be carried out in the power utilization peak period, and carbon dioxide can be liquefied through the cold capacity of LNG gas.