442 results about "Co2 storage" patented technology

The invention discloses a goaf CO2 sealed storage warehouse construction and grouting filling fire preventing and extinguishing method, and belongs to the technical field of goaf filling. The goaf CO2 sealed storage depot comprises a CO2 storage depot unit, a solid waste filling column and inflation-grouting equipment, an inflation bag is arranged in the CO2 storage depot unit, the inflation bag is movably connected in the CO2 storage depot unit, the CO2 sealed storage depot is constructed in the goaf through the inflation bag, alkaline solid waste and mineralized slurry, and the storage depot is used for supporting a roof rock stratum and storing CO2. Large-scale recycling of the alkaline solid waste can be achieved through the sealed storage warehouse, the storage warehouse is used for supporting the goaf roof rock stratum and storing CO2, the roof rock stratum is prevented from collapsing and endangering mine production safety, CO2 emission is reduced, the greenhouse effect is improved, and cooperative treatment of goaf fire and CO2 storage is achieved.

The invention provides a CO2 sequestration simulation method based on transfer learning and a physical information neural network, which aims at a geological carbon dioxide sequestration process by combining the transfer learning and the physical information neural network, and comprises the following steps of: simulating and generating data by using a Matlab oil reservoir simulation tool box, and constructing a neural network basic model; the physical law of carbon dioxide migration in the porous medium is trained and learned through coarse resolution, then fine tuning is performed on the generated actual geological model data by adopting a migration learning strategy to adapt to different geological structures and injection conditions, and a neural network loss function is embedded in combination with a Darwest equation and a mass conservation equation to obtain a carbon dioxide migration model. Compared with a traditional numerical simulation method, the method has the advantages that the calculation efficiency is remarkably improved while the prediction precision is kept, and the method is suitable for carbon dioxide sequestration optimization and environmental risk assessment under complex geological conditions and has good industrial popularization value and environmental benefits.

The invention is applicable to the technical field of coal bed gas development and geological sequestration, and provides a THMC multi-field coupling simulation method and system for a process of displacing CH4 by coal bed CO2, and the method comprises the following steps: collecting multi-source parameter information of a target coal bed; according to the multi-source parameter information, constructing a coal seam structure model comprising a matrix and a crack system; constructing a control equation system based on the coal seam structure model, and introducing a multi-field coupling mechanism to obtain a fully-coupled mathematical model; performing numerical solution on the fully-coupled mathematical model to obtain a spatio-temporal evolution result of the key field variables; and according to the spatio-temporal evolution result of the key field variable, evaluating the index of the target coal seam. According to the invention, a heat-force-gas-chemical multi-physical field full-coupling simulation system is constructed, so that the CH4 recovery rate and the CO2 storage stability can be accurately predicted. The method is suitable for gas injection-storage coupling optimization of a multi-coal-rank and low-permeability coal seam, and has high precision, high adaptability and remarkable engineering guidance value.

The invention discloses a deep coal seam CO2 storage potential calculation method based on coal seam geological characteristics, and belongs to the technical field of CO2 geological storage. The method comprises the following steps: firstly, acquiring excess adsorption quantity of CO2 adsorbed by a coal seam under different time actions, and constructing an adsorption quantity calculation model under different time parameters by utilizing a relationship between the excess adsorption quantity and absolute adsorption quantity; then fitting porosity data under different adsorption times, and constructing a coal quality unit mass CO2 free quantity model; then, according to the CO2 solubility calculation model and the characteristic parameters of the target coal seam, a unit mass CO2 dissolved amount model is constructed; then, data of the relation between the migration distance of CO2 in the coal seam and time is taken, and a time-migration distance formula is fitted; and finally, establishing a unit mass coal sample supercritical CO2 storage capacity calculation model, and constructing a theoretical storage amount and actual storage amount equation of CO2 geological storage. By adopting the calculation method, a theoretical reference can be provided for shut-down coal mine CO2 sequestration development and utilization strategy research and sequestration address selection.

The invention relates to a compact ship tail gas carbon dioxide capture system and method, and the compact ship tail gas carbon dioxide capture system comprises a flue gas pretreatment unit, a hollow fiber membrane reactor absorption unit, a flue gas heat exchange unit, a multi-stage flash evaporation desorption unit, a CO2 compression liquefaction unit and a CO2 storage lightering unit. The compact ship tail gas carbon dioxide capture system has the advantages that the occupied area of the system is reduced, the operation cost of the system is reduced, and efficient capture of ship tail gas CO2 is achieved.

The invention discloses a coal underground gasification mining front and rear furnace common well continuous coordination propulsion method which comprises the following steps: S1, constructing a gas inlet well and a gas outlet well of a first furnace, and performing gas injection fracturing on a gasification to-be-mined area of the first furnace by using the gas outlet well; s2, coal seam combustion gasification operation is conducted on the gasification to-be-mined area of the first furnace, and synthesis gas is collected through a gas outlet well of the first furnace; meanwhile, a gas outlet well of the second furnace is used for conducting gas injection fracturing on the gasification to-be-mined area of the second furnace; s3, the combustion space area of the first furnace is made to be idle for cooling, meanwhile, the second furnace conducts combustion gasification operation, and the third furnace conducts gas injection fracturing operation; each furnace is subjected to a flow process of gas injection fracturing, combustion gasification, idle cooling and CO2 storage well closing treatment; and S4, completing each flow process in sequence. The upper furnace and the lower furnace carry out difference node follow-up according to the flow process by one flow node, the upper furnace and the lower furnace carry out well sharing, the number of drilled wells is reduced, geological damage is relieved, and the mining efficiency is improved.

The invention belongs to the technical field of carbon dioxide capture and utilization and geological sequestration, and discloses a numerical simulation method for migration of CO2 in stratum.The method comprises the steps that an actual stratum complex geological model is constructed, and then a numerical simulation model is obtained; finely adjusting the numerical simulation model to limit fluid channeling and external substance and energy exchange, and ensuring rapid convergence of operation; the injection of CO2 in different layers is simulated, and the influence of the injection layers on the migration law is analyzed; cO2 injection at different injection speeds and temperatures is simulated to analyze the influence of the injection speeds and temperatures on the migration law; cO2 is simulated to be injected at different injection temperatures under the condition of consistent initial salt concentration, and the influence of dissolved salt on migration and dissolution rules is analyzed; the injection of CO2 at different positions of the reservoir is simulated, and the influence of the injection well position on CO2 storage is analyzed; and optimizing well position arrangement to obtain an optimal well pattern scheme. According to the method, the results of various influence factors are comprehensively analyzed, and then the migration rule of CO2 in the stratum is accurately obtained.

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 ship LNG fuel supply and tail gas carbon dioxide capture system. The ship LNG fuel supply and tail gas carbon dioxide capture system comprises an LNG storage tank, a CO2 separation device, a CO2 compressor, an ejector, an LNG vaporization heater, a mixed gas heat exchanger, a flash tank, a liquid CO2 storage tank, a flue gas heat exchanger and an engine. According to the system, LNG cold energy and engine tail gas heat energy can be effectively utilized, and the energy consumption of the system is reduced.

The invention relates to compressed carbon dioxide energy storage equipment, a carbon dioxide storage device and a control method, a plurality of independent carbon dioxide storage air bags are detachably installed on a supporting frame, and the carbon dioxide storage air bags can serve as floating assisting air bags of water equipment after storing air; each carbon dioxide storage air bag is independently monitored and controlled through an inflation and deflation control component, the pressure of air stored in each air bag can be monitored in real time, and the storage and release amount of carbon dioxide can be quickly and flexibly adjusted; the displacement sensor monitors the posture change of the supporting frame in real time, the controller adjusts the inflation and deflation strategy or the system operation state in time according to the current air pressure state of each carbon dioxide storage air bag and the posture change of the supporting frame, and air bag damage or system faults caused by structural instability are effectively prevented. A plurality of independent carbon dioxide storage air bags in the air bag type storage device can be flexibly arranged on a supporting frame to adapt to different terrains and space constraints.

The invention discloses a method for simulating and calculating the CO2 burying rate of an exhausted gas reservoir, which comprises the following steps: S1, acquiring rock core, formation water, methane and CO2 samples, and measuring the basic physical properties of each sample; s2, under the formation condition, the rock core is saturated with formation water and subjected to methane displacement till no water is discharged; s3, CO2 displacement is conducted on the rock core, and CO2 injection and extraction data in the process are recorded till the depletion state is achieved; s4, under the constant pressure condition, the rock core is subjected to standing treatment, and the basic physical property of the rock core subjected to standing treatment is measured; and S5, establishing a CO2 burying rate calculation model, and calculating the CO2 burying rate in combination with the parameters obtained in the steps. According to the method, the CO2 burying rate can be accurately calculated, and evaluation indexes and references are provided for the safety of CO2 geological storage.

The invention provides a seabed CO2 storage induced fault activation micro-seismic monitoring system and an identification method. The method comprises the following steps: acquiring a data signal in a seabed CO2 injection process; calculating the distance between the monitoring position and the seismic source based on the data signal to locate the seismic source position; obtaining a seismic source moment tensor and a moment magnitude based on the seismic source position, and obtaining a seismic source mechanism solution based on the seismic source moment tensor; taking the seismic source mechanism solution as a clustering parameter, performing spatial clustering analysis on all microseismic events in the seabed CO2 injection process, and obtaining a potential hidden fault corresponding to each cluster; and for all micro-seismic events on each potential hidden fault, magnitude-frequency number linear fitting is carried out based on the moment magnitude, an earthquake b value of seismic activity on the fault surface is obtained, and fault activation is identified based on the earthquake b value. According to the invention, real-time monitoring of the fault state in seabed CO2 geological sequestration can be realized, and possible fault activation can be identified.

The present invention provides a source-sink matching method based on hydrate method and saline CO2 storage, which can improve the efficiency of carbon dioxide storage and reduce environmental risks. The method comprises the following steps: optimizing the terrestrial carbon source distribution points through a mixed integer linear programming (MILP) model to minimize the transportation cost and path. Accurately determine the geological characteristics of the storage target area using three-dimensional seismic data. Comprehensively evaluate the storage capacity of saline aquifers and hydrate method through numerical models, considering three mechanisms of structural storage, dissolution storage and residual gas storage. The MILP model is applied again for cost analysis and source-sink matching. The environmental footprint is analyzed through life cycle assessment (LCA) to ensure the sustainability of the storage scheme. The method provides an efficient, economical and environmentally friendly solution for geological storage of carbon dioxide.

The invention discloses a device and a method for preparing a negative carbon cementing material by a wind power suspension semi-dry method, and belongs to the technical field of comprehensive utilization of solid waste resources. The method for preparing the negative carbon cementing material comprises the following steps: keeping the humidity and CO2 concentration of a reaction system, and carbonizing the wet steel slag micro-powder in the reaction system while the wet steel slag micro-powder is in a suspended state under the action of wind power, so as to obtain the negative carbon cementing material. The CO2 storage rate of the prepared negative carbon cementing material is equivalent to that of wet carbonization, the CO2 storage rate of the negative carbon cementing material is 8-12%, and the bulk density is 1.05-1.2 g / cm < 3 >. In the preparation process, the water resource consumption is extremely low, no wastewater is discharged, and water resource waste and wastewater discharge pollution are avoided.

The electromechanical circuit overload protection equipment comprises a box body, a fire extinguishing mechanism is arranged at the top of the box body, a base is fixedly connected to the bottom of the box body, two sets of box doors are arranged at the front end of the box body, and the fire extinguishing mechanism comprises an outer shell; the internal pressure of the driving gas cylinder is detected through a pressure gauge, then materials in the driving gas cylinder can be supplemented through a valve, and then materials can be supplemented to four groups of carbon dioxide storage tanks through a connecting port formed in the rear end of a second electromagnetic valve. Gas in the box body is sucked into a gas conveying pipe through a hole in the bottom of a fire detector arranged in the box body, then the gas is conveyed into a detection cavity for detection through suction provided by a sampling fan connected with the gas conveying pipe, then the gas is filtered through a filter, fire gas is prevented from flowing out, and therefore other devices are triggered. And then the filtered gas is discharged through the exhaust port after the detection cavity detects the gas and confirms that the fire occurs.

The invention discloses a negative-carbon different-face filling system arrangement and mining method which comprises the following specific steps: firstly, during working face filling mining operation, retaining a mining roadway on one side of a filling section by utilizing a gob-side entry retaining technology, and reinforcing by adopting a roadway-side support body to serve as a CO2 filling roadway of the working face and a mining roadway on one side of an adjacent filling working face; then, a roadway is stoped from the adjacent working face, drill holes are formed in the mined-out area where the closed space is formed, and CO2 filling pipelines are arranged in the mining roadway and the drill holes; and finally, CO2 is injected into the goaf gangue high-pore filling body by a CO2 injection pump through a CO2 injection and filling pipeline, after filling mining of adjacent working faces is completed, CO2 injection is stopped, and a coal mining-filling-injection and filling cycle is completed. The system is simple in arrangement and flexible in operation, the dual purposes of solid waste disposal and CO2 storage are achieved, and green mining of coal resources is achieved.

The invention discloses a CCUS experimental device and method for carbon dioxide flooding and storage, and relates to the technical field of petroleum engineering. The device comprises a three-dimensional oil reservoir physical model, a fluid injection system, a fluid collecting and metering system, a resistivity monitoring system and a fluid migration observation system. The three-dimensional oil reservoir physical model is used for constructing a simulated stratum, and a development well pattern system is installed on the simulated stratum; the fluid injection system is connected with the injection well; the fluid collecting and metering system is connected with the production well; the resistivity monitoring system is provided with a plurality of monitoring points on the simulated stratum; the fluid migration observation system is used for observing a migration path of supercritical carbon dioxide in the three-dimensional oil reservoir physical model; and the distributed optical fiber monitoring system is arranged in the simulated stratum. According to the device and the method, oil reservoir water injection exploitation and CO2 injection oil displacement and CO2 storage stability simulation experiments in the later development period can be realized.

The invention relates to the technical field of methanol resource utilization, and discloses a system for preparing methanol based on SOEC-CH4 electrolysis, which is characterized in that a cathode subsystem main body reacts to generate water vapor and H2 mixed gas, the water vapor and H2 mixed gas are condensed and separated to obtain H2, and most of H2 is conveyed to an H2 storage buffer tank and stored; the anode subsystem for preparing CO2 comprises a CH4 tank, an anode subsystem main body and an electrolytic bath anode of an SOEC electrolytic bath which are communicated in sequence, and the anode subsystem main body reacts to generate water vapor, CH4 and CO2 mixed gas; the mixed gas of the water vapor, CH4 and CO2 is subjected to condensation and adsorption separation to obtain CO2, and most of CO2 is conveyed to a CO2 storage buffer tank to be stored; and the methanol preparation subsystem reacts to obtain methanol. According to the system for preparing methanol through electrolysis, methane is introduced to prepare carbon dioxide, the technical problems of high energy consumption and low comprehensive utilization rate of waste heat and wastewater are solved, and cost is greatly reduced to prepare methanol.

The invention discloses a storage medium and a CO2 storage site escape emission calculation method, device and equipment. The method comprises the steps that after a target monitoring area is gridded, the emission amount of carbon dioxide escaping from a storage bottom layer to the ground surface in each grid is obtained; accumulating the carbon dioxide emissions of the grids to generate CO2 geological dissipation emissions of the target monitoring area in a preset statistical period; acquiring monitoring data of each preset point location; according to the monitoring data, the emission amount of carbon dioxide escaping in the conveying process of the carbon dioxide separated from the produced gas is calculated through a preset algorithm; according to the CO2 geological dissipation emission and the emission of the carbon dioxide dissipated in the conveying process of the carbon dioxide separated from the produced gas, the dissipation emission of the CO2 storage site is calculated. According to the method, the CO2 geological dissipation emission amount and the carbon dioxide emission amount dissipated in the conveying process are added, and the CO2 storage site dissipation emission amount of the whole target monitoring area in the statistical period is comprehensively and accurately obtained.

The invention discloses a three-dimensional multi-source data fusion CO2 burying monitoring system construction method. The method comprises the following steps: S1screening CO2 burying leakage high-risk parts; s2, identifying and monitoring a CO2 leakage mode in a key risk area; the method is suitable for the technical field of carbon capture, utilization and storage, a CO2 burying monitoring system based on multi-source data fusion is established, a CO2 monitoring method wide in adaptability is formed, the problems that a single monitoring method is poor in adaptability and small in monitoring range are solved, and support is provided for safe implementation of CCUS engineering.

The invention discloses an air carbon capture system coupled with compressed air energy storage and a capture method thereof. The air carbon capture system comprises a compressed air energy storage system, a heat recovery system and an air carbon capture system, the compressed air energy storage system comprises a multi-stage air compression device, a compressed air storage facility and an air turbine unit; the air carbon capture system comprises a CO2 adsorption-desorption reactor and a CO2 storage tank; the CO2 adsorption-desorption reactor is arranged between two certain stages of compressors of the multi-stage air compression device; the heat recovery system comprises a heat storage tank and a normal-temperature tank. According to the invention, the air carbon capture system is coupled with the compressed air energy storage system, so that the adverse effect of water vapor in air on the selectivity and adsorption capacity of the adsorption material can be reduced, and compared with the traditional direct air carbon capture system, the air capture energy consumption is reduced, the CO2 desorption energy consumption is reduced, and the energy utilization efficiency is improved.

The invention discloses a coal-fired unit energy storage coupling carbon capture system and method based on calcium circulation, and aims to realize efficient and cheap capture of CO2 in flue gas while performing energy storage peak regulation of a coal-fired unit. The system comprises main equipment such as a calcination / heat absorption reactor, a pressurized carbonation / heat release reactor, a CaCO3 storage tank, a CaO storage tank and a CO2 storage tank, and auxiliary equipment such as a gas booster compressor, residual pressure power generation equipment, an electric heating module, a dust remover, a gas cooler, a solar gas heater and a smoke-CO2 heat exchanger. According to the method, electric energy of green electricity or valley electricity and heat energy of high-temperature flue gas of a boiler are converted into chemical energy by adopting the cyclic calcination characteristic of CaCO3-based particles and stored in the CaCO3-based particles, and the chemical energy is released again in the form of heat energy when a unit supplies heat to the outside or a power grid uses electricity at the peak. The system has high operation flexibility and economical efficiency.

The invention discloses a land-sea integrated full-process CO2 geological utilization and storage project technical economic evaluation method and tool. The method comprises the following steps: S1, evaluating and delimiting a full-process CO2 geological utilization and storage range; step S2, an evaluation process; s3, selecting a full-process CCUS technical scheme; and S4, carrying out full-process CCUS technical economic evaluation. The invention relates to the technical field of environmental science and engineering. According to the land-sea integrated full-process CO2 geological utilization and storage project technical economic evaluation method and tool, the problem of how to obtain information such as a technical scheme, cost budget, project layout and planning of a full-process CO2 geological utilization and storage project suitable for an enterprise or a technical and economic environment under the condition of lacking CO2 storage project experience and data is solved; and the feasibility of project development is provided.

The invention discloses a high-water-cut fault block oil reservoir CO2 oil displacement storage multi-objective optimization method, which comprises the following steps of: establishing a high-water-cut fault block oil reservoir CO2 oil displacement storage fluid-solid coupling model, sampling based on a Latin hypercube sampling method to generate samples, and constructing an objective agent model by adopting a long-short-term memory neural network and the samples, and introducing a fast non-dominated sorting genetic multi-objective optimization algorithm, and optimizing the plurality of objective functions based on the constructed proxy model to obtain a Pareto solution set of the objective functions. Thus, based on a comprehensive framework of the three-dimensional oil reservoir seepage and geomechanics coupling model, the LSTM algorithm and the multi-objective optimization function NSGA-II, an injection-production well production system scheme can be obtained through optimization, the crude oil recovery rate and CO2 storage amount are maximized, and fault sliding displacement is minimized; and the CO2 oil displacement storage joint optimization efficiency and the result accuracy of the high-water-content fault block oil reservoir 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 carbon dioxide storage and utilization, and particularly relates to a stainless steel oil casing for carbon dioxide flooding enhanced oil extraction and a manufacturing method thereof. The stainless steel oil casing comprises the following chemical components in percentage by weight: less than or equal to 0.03% of C, 0.15%-0.3% of Si, less than or equal to 0.010% of P, less than or equal to 0.005% of S, 14.0%-18.0% of Cr, 0.5%-2% of Mn, 2.0%-3% of Ni, 1.0%-3.0% of Mo, 0.20%-0.30% of N, 0.5%-1.0% of Cu, 0.025%-0.1% of Nb, 0.015%-0.025% of V, 0.001%-0.003% of Ca, 0.01%-0.03% of Re and the balance of Fe and inevitable impurities. The yield strength of the stainless steel oil casing ranges from 758 MPa to 931 MPa, the tensile strength is larger than 862 MPa, the ductility is larger than or equal to 30%, the stainless steel oil casing has good obdurability matching and excellent corrosion resistance and low-temperature impact toughness, the applicable service temperature range is-50 DEG C to 180 DEG C, the stainless steel oil casing can be applied to the low-temperature environment caused by injection-production yield increase after carbon dioxide capture, and the service life of the stainless steel oil casing is prolonged. And two or three of carbon dioxide, hydrogen sulfide and chloride ions coexist in the corrosive medium working condition.

The invention discloses a zero-carbon method for strengthening coal seam gas recovery and CO2 storage by using flue gas residual heat in the technical field of residual heat utilization, gas extraction and carbon emission reduction. The zero-carbon method comprises the following steps: step 1, collecting high-temperature flue gas in a power plant; step 2, performing high-temperature CO2 concentration-compression; step 3, reservoir evaluation and area selection; 4, designing and constructing a horizontal well; 5, high-temperature CO2 injection and joint control energy increasing are conducted, specifically, high-temperature CO2 is injected into a preset section through a pump, the injection pressure and the injection speed are adjusted through the joint control energy increasing technology, and the diffusion range and the diffusion speed of CO2 are controlled; 4, gas recovery and CO2 storage: high-temperature CO2 is used for providing energy to promote gas desorption on one hand, and the high-temperature CO2 and CH4 in the adsorption state are subjected to competitive adsorption on the other hand. The method is simple and easy to operate, the coal seam gas partial pressure is reduced through CO2 injection, the recovery efficiency is improved, CO2 can be adsorbed by a coal seam and stored in a reservoir, and geological storage of CO2 is achieved.

A method for predicting CH4 production and CO2 sequestration in a CO2-ECBM process belongs to the field of natural hydrogen resource exploration, and is technically characterized by comprising the following steps: constructing a multiphase and multicomponent coupling model for describing the migration process of water, methane and carbon dioxide of a stratum coal bed gas reservoir; the method comprises the following steps: constructing a geologic model of a stratum coalbed methane reservoir, performing grid division on the geologic model to obtain a plurality of grid units reflecting different spatial distribution positions of the coalbed methane reservoir, and setting initial conditions and boundary conditions of the geologic model; and according to the multiphase and multicomponent coupling model, solving spatio-temporal evolution characteristics of pressure and concentration of water, methane and carbon dioxide of each grid unit of the geologic model to obtain distribution in time and space. According to the method, the influence of the underground water in the coal bed gas on the migration behavior of methane and carbon dioxide is fully considered, the limitation of prediction result deviation caused by neglecting the effect of the underground water in the existing research is overcome, and the accurate prediction of the methane yield and the carbon sequestration amount in the CO2-ECBM process is realized.

The invention discloses a fuel gas supply and carbon capture system, which covers the whole process flows of fuel gas supply, CO2 capture, CO2 compression, CO2 liquefaction, CO2 storage and the like, and fully utilizes the cold energy of BOG (Boil Off Gas) from an LNG (Liquefied Natural Gas) cabin for cooling the BOG compressed by a BOG compressor, so that an additional intercooler, an aftercooler and a fresh water cooling system are not needed; the heat energy of the compressed BOG and the compressed CO2 is fully utilized to heat the BOG from the LNG cabin, so that the temperature of the BOG entering the BOG compressor meets the air inlet temperature requirement of a normal-temperature compressor, and therefore, the BOG compressor can adopt the normal-temperature compressor; heat energy of waste gas of the dual-fuel engine is fully utilized to heat rich liquid, so that additional heating media and heat sources are not needed; the cold energy of BOG from the LNG cabin is fully utilized and used for liquefying CO2, and therefore extra cooling media and cold sources are not needed.

The invention belongs to the technical field of ships, and provides a large bulk cargo ship high-pressure CO2 storage system based on seawater cold insulation, which comprises a high-pressure storage tank, a storage tank cavity, a temperature sensor, a control unit, a supercharging device, a pressure sensor, a cooling device, an electromagnetic valve, a safety valve, a seawater valve, a seawater pump, an inlet valve, a release valve, a return valve, a drain valve and a void chamber. CO2 is pressurized, seawater is utilized for sufficient heat exchange, the pressure of the high-pressure storage tank is at the lowest pressure corresponding to the temperature of the seawater, power consumption of the pressurizing device is greatly reduced, and compared with a low-temperature CO2 liquefaction mode which needs large low-temperature refrigeration power consumption, the high-pressure storage tank does not need to consume power for refrigeration and heat preservation, the power consumption is lower. And meanwhile, liquefied CO2 is stored in the high-pressure storage tank, and seawater is utilized to fully exchange heat with the liquid CO2 in the high-pressure storage tank, so that the CO2 in the high-pressure storage tank is always kept in a liquid state, and the condition that the weight of the CO2 loaded in a single high-pressure storage tank is reduced due to the fact that the CO2 is in a gaseous state is avoided.