332 results about "Liquefaction" patented technology

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 belongs to the field of oil and gas exploitation, geothermal exploitation and deep ground engineering, and discloses an oil and gas shaft crack plugging pressure repair material and method based on microwave heating bismuth-based alloy, the material comprises 74%-86% of bismuth-based alloy powder, 10%-15% of Fe3O4-SiO2 core-shell magnetic particles, 3%-8% of a microwave sensitizer and 1%-3% of a wetting agent. The repairing material is conveyed to the position, where shaft crack plugging repairing needs to be conducted, in the oil and gas shaft, then the repairing material is melted in a microwave heating mode, then the melted alloy is filled in shaft crack plugging, and then a rotating gradient magnetic field is used for repairing the oil and gas shaft crack. And the liquid alloy is driven to directionally migrate to a target crack area along the magnetic line, and after alloy liquid is cooled and solidified, pressure repairing of the oil and gas shaft crack plugging target position is achieved. Precise positioning, efficient filling, phase change control and complete recovery of the repairing material can be achieved in the extremely deep environment, and therefore the high-quality repairing requirement for oil and gas shaft crack plugging pressure repairing achieved through efficient liquefaction of plugging metal can be met.

The disclosure describes processes which include cooling a natural gas product stream to a cryogenic liquid storage temperature by way of refrigeration streams which include a primary refrigeration stream, a secondary refrigeration stream, and a tertiary refrigeration stream in a refrigeration system. After leaving the refrigeration system, the pressure of each refrigeration stream is increased, and upon reaching a sufficient pressure, the refrigeration streams are recycled to flow back into the refrigeration system as a recycle stream. The disclosure further describes systems capable of performing the processes. The processes and systems can include one or more sensors and one or more controls capable of adjusting a flow rate, flow volume, and / or flow ratio among one or more gas streams to maximize cooling efficiency based on monitoring from the one or more sensors. Mobile natural gas liquefaction systems are also described.

This invention provides a coal tar pitch-based nickel catalyst, its preparation method, and its application, belonging to the field of solid waste resource recycling and synthetic carbon materials technology. This invention uses a mixed roasting method to prepare a coal tar pitch-based nickel catalyst with micropores and mesopores from the residual coal tar pitch after coal tar extraction. The synergistic effect of active nickel as an active site and the functional groups on the support surface significantly improves its catalytic liquefaction performance, exhibiting the advantages of "low cost, high temperature resistance, and strong adaptability." The preparation method provided by this invention not only offers an effective way for the high-value recycling of coal tar pitch but also provides a low-cost material for green conversion, environmental governance, catalysis, and other fields. It represents a green resource utilization strategy with significant economic and environmental benefits and broad commercial prospects.

Carbon dioxide re-liquefaction may be provided by a system capable of receiving a vented boiled off gas stream from a storage vessel at a first compressor; compressing the vented BOG stream at the first compressor into a first compressed BOG stream at a first pressure and a second compressed BOG stream at a second pressure, greater than the first pressure; cooling the first compressed BOG stream in a heat exchanger to produce a liquid stream by: cooling, via a refrigerant unit, the second compressed BOG stream to produce a first cold stream, of a temperature less than that of the first compressed BOG stream; exchanging heat from the first compressed BOG stream against tire first cold stream; and returning the liquid stream to the storage vessel.

The utility model is suitable for the technical field of acid liquor recycling, and provides an acid liquor recycling device which comprises a base, the heating cylinder is fixed at the top of the base and is used for increasing temperature; the storage cylinder is arranged in the heating cylinder and is used for storing the filtered acid liquor; the filter cylinder is detachably mounted at the top of the storage cylinder and is used for filtering acid liquor; and the collecting hopper is fixed at the top of the filter drum and is used for guiding acid liquor to be added. According to the acid liquor recycling device provided by the scheme, the acid liquor is heated through the heating cylinder, impurities are filtered through the filter cylinder, the acid liquor is conveniently added through the collecting hopper, the air pump and the air inlet pipe generate negative pressure, and the negative pressure monitoring piece monitors the negative pressure state in real time; acid gas is guided out through a connecting pipe, the acid gas is buffered and stored through a buffer box, the acid gas is liquefied through a low-temperature liquefaction pipe, and the liquefied acid liquid is stored through a collecting box, so that efficient filtering, collecting and recycling of the acid liquid are achieved.

The utility model discloses a kind of hot tank exhaust liquefaction structures, including condensate backflow member being fixed on hot tank, steam exhaust pipe being installed on condensate backflow member, condensate backflow member is provided with steam-liquid blending cavity, steam exhaust pipe is provided with the steam passage of intercommunication steam-liquid blending cavity, the inlet end of steam passage is communicated with the inner cavity of hot tank by steam-liquid blending cavity, steam-liquid blending cavity inner wall and steam exhaust pipe outer wall form condensate space, steam converges to form liquid in condensate space inner wall and is backflowed to hot tank by steam-liquid blending cavity. With the effect that hot tank can be effectively pressure-relieved, reduce steam exhaust amount when hot tank pressure-relieved.

The invention relates to a facility for cooling a flow of cryogenic fluid comprising a first circuit for fluid to be cooled, for example liquid nitrogen and / or liquid oxygen, a cryogenic refrigerator with a cycle circuit, at least one heat exchanger providing heat exchange with the first circuit for fluid to be cooled and the cycle circuit of the refrigerator, the facility comprising a second circuit for fluid to be liquefied, for example nitrogen gas and / or oxygen gas, the second fluid circuit being in heat exchange with the cycle circuit of the refrigerator in at least one heat exchanger of the facility, the facility being configured so as to be switchable into a first cooling operating mode, in which the facility cools the first fluid circuit in order to cool a liquefied fluid, preferably in order to generate a quasi-isothermal transformation of said fluid, and a second liquefaction operating mode, in which the facility cools the second fluid circuit with a view to liquefying a gas flow.

The utility model is suitable for the technical field of hydraulic fill sand foundation vibroflotation, and provides a filler-free double-shaft multi-dimensional vibroflotation device for a hydraulic fill sand foundation, which comprises a mounting frame, the vibrating rods are symmetrically arranged on the mounting frame; the vibrating head is arranged on the vibrating rod and is used for carrying out vibroflotation operation on the hydraulic reclamation sand foundation; and the exhaust mechanism is assembled on the vibration rod and is used for exhausting during sand liquefaction. According to the filler-free double-shaft multi-dimensional vibroflotation device for the hydraulic filling sand foundation, filler-free double-station vibroflotation operation can be conducted on the hydraulic filling sand foundation, and the overall vibroflotation operation efficiency is effectively improved.

This invention discloses a small skid-mounted liquefied natural gas (LNG) unit and its operation method integrating a methane refrigeration system, belonging to the field of natural gas liquefaction technology. The unit includes a methane-rich gas liquefaction system, an expansion refrigeration system, and a methane open-loop refrigeration cycle system. Addressing the shortcomings of existing small skid-mounted LNG technologies, such as large footprint, high investment, and complex operation, this invention innovatively adopts an integrated architecture of "single-stage expansion + methane open-loop refrigeration cycle." The expansion refrigeration system employs a single-stage process of pre-cooling followed by expansion; the methane open-loop cycle uses methane from the feed gas as the refrigerant, eliminating the need for external refrigerant. Through designs such as expansion refrigeration refrigeration backflow branch and methane refrigeration branch, precise cascade utilization of cooling capacity is achieved. This method has few operating variables and is simple to operate. Overall, this invention achieves a highly compact system, low investment and maintenance costs, high energy utilization efficiency, and strong reliability, perfectly meeting the core requirements of small skid-mounted scenarios.

This utility model belongs to the technical field of wastewater evaporator tanks, and more particularly to a jacketed heat pump wastewater evaporator tank structure. It includes an evaporator tank body, on which a jacketed tank is fitted. A steam exhaust pipe is fixedly installed on the upper end face of the evaporator tank body, and a wastewater conveying pipe is fixedly installed on the outer wall of the evaporator tank body. A steam cooling liquefaction component is installed on one side of the evaporator tank body. This utility model accelerates the liquefaction of water vapor from wastewater evaporation through the steam cooling liquefaction component, thus reducing the amount of water mist released into the air due to delayed liquefaction and reducing the weight of the water obtained from wastewater evaporation. Furthermore, the water used for cooling and liquefying the steam can be recycled, reducing the reliance on the steam cooling liquefaction water source. The flattened branching of the circulating water accelerates its cooling, thereby maintaining efficient cooling and liquefaction of the steam in the steam conveying pipe.

The invention relates to a method for liquefying and purifying carbon dioxide from a gas comprising more than 70% by volume of carbon dioxide, the method comprising the following consecutive steps: a step of filtering the gas, then a step of compressing the gas at a pressure of between 60 bar and 80 bar, then a step of drying the gas, then a step of liquefying the gas, then a step of subcooling the liquefied gas, a step of expanding the liquefied gas, then a step of distilling the fluid so as to isolate the carbon dioxide, then a step of recovering the carbon dioxide in liquid form. The invention also relates to the device implementing the method and to the use thereof.

The utility model relates to carbon dioxide manufacturing technical field provides a kind of for carbon dioxide production's adsorption tower drying system to handle original carbon dioxide gas, and original carbon dioxide gas refers to the gas with moisture and alcohol after not passing through pre rectification tower rectification treatment, including the first adsorption tower and second adsorption tower of the first heating regeneration component, second heating regeneration component being set respectively, first adsorption tower and second adsorption tower are connected in parallel between liquefier and pre rectification tower;First heating regeneration component and second heating regeneration component all include the molecular sieve of array setting and adsorbent fixed between adjacent molecular sieve, and the heating regeneration process in first adsorption tower and second adsorption tower is independent of each other.The utility model is according to the process of " one open one spare " independent participation handles original carbon dioxide gas, and alcohol removal water in a adsorption tower, not only simplify the treatment process before carbon dioxide gas liquefaction, and improve the alcohol removal efficiency of adsorption tower.

The ammonia recovery system for purge gas comprises a heat exchange separation mechanism, a nitrogen circulation mechanism and an expansion machine, the nitrogen circulation mechanism comprises a nitrogen pipeline and a compressor, and nitrogen, refrigerated by the cold end of the expansion machine, in the nitrogen pipeline passes through the heat exchange separation mechanism and then passes through the compressor. The compressor is installed on the nitrogen pipeline and drives nitrogen in the nitrogen pipeline to sequentially flow through the cold end of the expansion machine, the heat exchange separation mechanism and the hot end of the expansion machine and then return to the compressor to form nitrogen circulation. The heat exchange separation mechanism is connected with the purge gas, and the heat exchange separation mechanism takes nitrogen output by the cold end of the expansion machine as a cold source to cool the purge gas, so that ammonia gas in the purge gas is liquefied into liquid ammonia, and the liquefied liquid ammonia in the purge gas is separated and output. According to the technical scheme, ammonia gas is separated and recycled in a cooling and liquefying mode, gaseous ammonia in the purge gas can be effectively recycled, resource waste is reduced, and pollution of the purge gas can be relieved.

The invention provides a method, a device and a system for rapidly analyzing components of direct coal liquefaction oil based on a near infrared spectrogram, the method comprises the following steps: acquiring sample data of the direct coal liquefaction oil, the sample data of the direct coal liquefaction oil comprises near infrared spectrum data of the direct coal liquefaction oil and detailed composition data of sample oil; according to sample data of the direct coal liquefaction oil and a ResNet-34 neural network algorithm, the near infrared spectrum of the liquefied oil with known composition is subjected to statistical treatment, the relationship between the liquefied oil composition and a spectrogram is obtained, then the near infrared spectrum spectrogram of an unknown oil product is identified to predict the composition, and a direct coal liquefaction oil component prediction model is established. The prediction model is at least used for component prediction of the direct coal liquefaction oil; the direct coal liquefaction oil in the production process is analyzed according to the prediction model obtained through training, online analysis can be rapidly and accurately conducted on the direct coal liquefaction oil, and the method can solve the technical problems that in the direct coal liquefaction oil production process, analysis is difficult, and the analysis period is long relative to the production period.

The invention relates to the technical field of flue gas treatment, and discloses a flue gas carbon dioxide trapping system which comprises a compressor for pressurizing flue gas, a first gas-liquid separator for removing water drops, a spraying liquefier and a second gas-liquid separator for performing contact heat exchange with the water-drop-removed flue gas, the spraying liquefier is internally provided with a spraying layer for spraying supercooled liquid carbon dioxide, the spraying liquefier is provided with an air inlet, an ice discharge port, an exhaust port and a liquid discharge port, the liquid carbon dioxide discharged from the liquid discharge port is shunted to a circulation branch and a product branch, and the liquid carbon dioxide in the circulation branch is cooled to a supercooled state and then flows back to the spraying layer; the flue gas and the supercooled liquid carbon dioxide are in direct contact for countercurrent flow heat exchange, so that the carbon dioxide in the flue gas is condensed and liquefied, most of the liquid carbon dioxide is recycled as a cooling medium, and meanwhile, residual moisture in the flue gas is desublimated into ice by utilizing low temperature and floats away from the liquid surface by virtue of density difference, so that adsorption-free deep dehydration is realized.

The application discloses a system for preparing liquefied natural gas by hydrogen supplementing of coal gas in medium-low temperature pyrolysis, which comprises a water electrolysis hydrogen production device, a methane synthesis device, a coal pyrolysis furnace, a coal gas reforming device, a pressure swing adsorption hydrogen extraction device and a deep cooling liquefaction device; the water electrolysis hydrogen production device is connected with an inlet of the methane synthesis device; a pyrolysis gas outlet and a semi-coke outlet of the coal pyrolysis furnace are connected with an inlet of the coal gas reforming device, and an outlet of the coal gas reforming device is connected with an inlet of the methane synthesis device; an outlet of the methane synthesis device is connected with an inlet of the pressure swing adsorption hydrogen extraction device, and the pressure swing adsorption hydrogen extraction device is connected with the deep cooling liquefaction device. The application realizes the collaborative conversion and integrated innovation of the medium-low temperature coal pyrolysis process and the water electrolysis hydrogen production process, develops and enriches product types and additional values, and has no technical barriers in equipment or devices, and is convenient for industrialization or large-scale application.

The invention discloses a new energy off-grid green, hydrogen and ammonia production integrated system coupled with liquid-air energy storage and power generation, and relates to the technical field of new energy comprehensive utilization and chemical production. A wind-light-electricity new energy power generation module converts wind energy and solar energy into electric energy, and a liquid air energy storage module stores energy through air compression-liquefaction-expansion; the hydrogen production module utilizes electric energy to electrolyze water to produce hydrogen, the air separation module produces nitrogen and supplies the nitrogen to the ammonia production module, and the ammonia production module reacts hydrogen and nitrogen to synthesize green ammonia. The problems of intermittency and instability of new energy power generation are effectively solved, integrated production of green hydrogen and green ammonia under the off-grid condition is achieved, dependence on traditional energy and external infrastructures is reduced, the production cost and carbon emission are reduced, and the energy utilization efficiency is improved; meanwhile, the circulating system of the ammonia production module improves the utilization rate of raw materials and improves the economic benefits of the system.

The invention discloses an efficient adsorption and condensation coupled waste gas organic matter recovery system and method, and relates to the technical field of industrial waste gas treatment. Comprising an adsorption concentration unit and an efficient heat exchange and circulation module connected to a desorption gas outlet of the adsorption concentration unit through a pipeline, the deep condensation recovery unit is connected to a desorption gas outlet of the adsorption concentration unit through a pipeline, the catalytic oxidation unit is connected to a heat exchange outlet of the efficient heat exchange and circulation module through a pipeline, and the catalytic oxidation unit is used for controlling the adsorption concentration unit. The energy consumption is obviously reduced by adopting indirect heating desorption and an efficient heat exchange network; the system is high in integration level and capable of achieving full-automatic operation, meanwhile, the recycled organic matter is liquefied and recycled, the resource utilization level is improved, the operation cost is reduced, and meanwhile remarkable environmental protection and economic benefits are obtained.

The oil-liquefaction apparatus is provided with a thermal cracking furnace and a condenser, in which the thermal cracking furnace is provided with at least a pyrolysis cauldron 21, a heating furnace 22, a stirring device which stirs a material of interest in the pyrolysis cauldron 21, and a discharge section which discharges a thermal cracking gas generated in the pyrolysis cauldron 21 to the condenser. The pyrolysis cauldron 21 has a bottom part 21d which has a bottom surface 21c, an approximately cylindrical intermediate part 21a, and a lid part 25. A heating furnace 22 heats the bottom part 21d and at least the lower part of the intermediate part 21a. The stirring device has an shaft 27 and a blade part 26. The blade part 26 is slidably contacted with the bottom surface 21c and a ring-shaped surface 21b by rotating the shaft 27.

The present application provides a coal direct liquefaction pitch lock slag discharge device and an online slag discharge method. The device comprises a vertical slag collecting tank, a lock slag discharge valve and a horizontal slag storage tank. The bottom of the vertical slag collecting tank is connected with one end of the lock slag discharge valve, and the other end of the lock slag discharge valve is connected with the horizontal slag storage tank. An inlet pipeline and an outlet pipeline are respectively arranged on the side wall of the vertical slag collecting tank. A first filter screen is arranged in the vertical slag collecting tank. The first filter screen is used to store the filtered waste slag in the inner cavity of the vertical slag collecting tank, and discharge the waste slag into the horizontal slag storage tank through the lock slag discharge valve. The present application realizes online slag discharge of coal direct liquefaction pitch, reduces the production operation steps after the coal direct liquefaction pitch is blocked, reduces the work intensity, and improves the safety operation coefficient of the device.

The invention provides a carbon dioxide trapping and liquefying system. The carbon dioxide trapping and liquefying system comprises a first absorption tower, a second absorption tower, a first desorption tower, a second desorption tower, a first heat pump and a second heat pump. By adopting the scheme of absorption tower series grading absorption, desorption tower series grading desorption and heat pump system, the total energy consumption of the system is reduced, and the trapping efficiency is improved. Wherein the absorption towers are connected in series for graded absorption and the desorption towers are connected in series for graded desorption, so that the height and scale of the towers are reduced, and the regeneration energy consumption of the system can be reduced while the initial construction cost of the absorption towers is reduced. A multi-stage heat pump system is adopted to recover and utilize steam waste heat of a second desorption tower, heat of carbon dioxide at an outlet of a compressor and heat released in the liquefaction process to reduce energy consumption of a reboiler, the temperature of extracted gaseous carbon dioxide can also be reduced, energy consumption is reduced in the liquefaction process, the liquefaction proportion is effectively increased, and the energy consumption is reduced. The liquefied carbon dioxide production efficiency is improved.

Provided is a hydrocarbon recovery device that can suppress a decrease in the ability to remove hydrocarbons from a treated gas containing hydrocarbons. A hydrocarbon recovery device for removing and recovering hydrocarbons contained in a treated gas includes: a treatment tank having an adsorbent material housing space in which an adsorbent material capable of adsorbing hydrocarbons is housed; a treated gas introduction valve, which is a valve provided on a treated gas introduction pipe connected to the treatment tank; a treated gas discharge valve, which is a valve provided on a treated gas discharge pipe connected to the treatment tank; a vacuum pump, the suction port of which is connected to the treatment tank via a vacuum suction pipe; a hydrocarbon liquefaction section connected to the exhaust port of the vacuum pump; a vacuum suction valve, which is a valve provided on the vacuum suction pipe; an atmospheric pressure opening valve for opening the treatment tank to the atmosphere; a valve control section for performing a gas treatment operation; a suction sub-operation; and an adsorbent regeneration operation.

The application discloses a kind of solar energy cascade utilization liquid air energy storage system and its operating method, the system includes liquid air energy storage system, photo-thermal power generation system and organic rankine cycle power generation system.In the low valley of electricity and light, photo-thermal power generation system generates electric energy, part is used to drive liquid air energy storage subsystem for supply load.The system uses air liquefaction and expansion cycle to realize energy storage, and converts excess electric energy into liquid air storage.In the peak of electricity, the system releases energy, and produces electric energy by gasification and expansion liquid working medium, and uses photo-thermal heat in the form of series, parallel heat exchange to heat working medium, realizes energy cascade utilization, solves the problem of low efficiency of expander when liquid air releases energy.The system can make full use of the peak shaving potential of liquid air energy storage, organically combines the thermal energy and electric energy of photo-thermal system, is conducive to improving overall energy conversion efficiency, realizes all-weather renewable energy utilization.

The present disclosure provides a carbon-based heat storage material and a preparation method thereof, which takes carbon-based raw materials as main components, takes slurry coal direct liquefaction residual as a binder, adds fiber additives, and adjusts the ratio of each component, so that the prepared carbon-based heat storage material can effectively store and transfer heat, has good stability, and can be prepared by only mixing and profiling at normal temperature and medium-temperature calcination, so that the preparation process is simple and the energy consumption is low.

The invention provides an energy-saving natural gas liquefaction process system based on waste heat recovery, and belongs to the technical field of natural gas liquefaction, and the energy-saving natural gas liquefaction process system based on waste heat recovery comprises a cooling circulation system and a waste heat recovery system. And an efficient and closed-loop energy gradient utilization network is constructed. The system not only fully utilizes high-temperature waste gas discharged by the gas turbine to drive the steam turbine to generate power, but also further recovers medium-low-grade waste heat in exhaust gas of the steam turbine and heat generated in the compression process of a mixed refrigerant for pre-cooling raw material natural gas. According to the multi-stage and multi-source waste heat recovery mode, the energy consumption of a traditional pre-cooling link is remarkably reduced, the overall thermodynamic perfection degree of the system is improved, and efficient and low-carbon utilization of energy is achieved.

The utility model discloses a waste gas recycling device for carbon neutralization, which comprises a refrigerating machine, the refrigerating machine is connected with a gas reservoir through a guide pipe, a gas outlet of the gas reservoir is connected with a vertical pipe, a gas outlet of the vertical pipe is connected with a gas storage tank through a guide pipe, seven gas outlet connectors are arranged on the vertical pipe, and the gas storage tank is connected with the gas storage tank through a guide pipe. The seven gas outlet connectors are connected with seven gas storage tanks through seven guide pipes correspondingly, and the seven gas outlet connectors in the vertical pipe are in butt joint with a first gas outlet pipe, a second gas outlet pipe, a third gas outlet pipe, a fourth gas outlet pipe, a fifth gas outlet pipe, a sixth gas outlet pipe and a seventh gas outlet pipe correspondingly. Carbon-neutralized waste gas is liquefied through the refrigerating machine, then various liquid gases are sequentially gasified by controlling the temperature interval, and various gases are collected through the corresponding gas storage tanks, so that the waste gas is thoroughly separated, and the gases can be recycled.

The invention relates to the field of coal chemical industry, and discloses a preparation method of coal-based rocket kerosene, which comprises the following steps: mixing a coal indirect liquefaction Fischer-Tropsch synthesis fraction and a coal direct liquefaction fraction, carrying out a deep hydrofining reaction, fractionating, and taking fractions with an initial boiling point of 185-205 DEG C and a final boiling point of 245-265 DEG C to obtain the coal-based rocket kerosene, wherein the mass ratio of the indirect coal liquefaction Fischer-Tropsch synthesis fraction to the direct coal liquefaction fraction is (20 to 40): (80 to 60); the initial boiling point of the indirect coal liquefaction Fischer-Tropsch synthesis fraction is 150-170 DEG C, the final boiling point of the indirect coal liquefaction Fischer-Tropsch synthesis fraction is 290-310 DEG C, the initial boiling point of the direct coal liquefaction fraction is 160-180 DEG C, and the final boiling point of the direct coal liquefaction fraction is 300-320 DEG C.

The utility model provides an energy storage system which comprises an energy storage module which comprises an energy storage flow path, in the energy storage flow path, a first working medium output by a first cavity is sequentially compressed, cooled and subjected to latent heat exchange with a second working medium in a phase change heat exchanger to be converted into a liquid state from a gas state, the first working medium is conveyed to a first working medium liquid storage tank, and electric energy is converted into pressure energy; and the energy release module comprises an energy release flow path, in the energy release flow path, a first working medium output by the first working medium liquid storage tank is subjected to latent heat exchange with a second working medium in the phase change heat exchanger in sequence and is converted into a gas state from a liquid state, and the first working medium is input into the first cavity after being heated and expanded, so that pressure energy is converted into electric energy. The first working medium and the second working medium exchange phase change latent heat in the reciprocal gas-liquid conversion process to achieve reciprocal phase state conversion, so that an external cold source does not need to be arranged in the liquefaction process of the first working medium, an external heat source does not need to be arranged in the gasification process, and therefore the energy storage system gets rid of limitation of external cold source or heat source conditions.

This invention discloses a zero-emission scattered gas liquefaction recovery and helium extraction system and method, comprising: an inlet separation unit for gas-liquid separation of the feed gas to obtain a first gas phase; a feed gas pressurization unit for interstage pressurization of the first gas phase to obtain a second gas phase; a feed gas deacidification unit for deacidification of the second gas phase to obtain a third gas phase; a dehydration and mercury removal unit for dehydration and mercury removal of the third gas phase to obtain a fourth gas phase; a heavy hydrocarbon removal unit for re-contact and cryogenic separation of the fourth gas phase after precooling to obtain a fifth gas phase and a heavy hydrocarbon liquid; a denitrification unit for denitrification of the fifth gas phase after liquefaction to obtain LNG and a sixth gas phase; a helium extraction unit for helium extraction from the sixth gas phase to obtain high-purity helium; a hydrocarbon stabilization unit for hydrocarbon stabilization of the heavy hydrocarbon liquid; and a condensate desulfurization unit for gas stripping desulfurization of the sulfur-containing condensate obtained from the previous stage. This invention can improve the recovery rate of scattered gas, reduce operating energy consumption, and reduce investment costs.