36 results about "CO2 content" patented technology

The invention discloses a preparation method of a biomass-based activated carbon desulfurizer. The method comprises the following steps: 1, crushing, cleaning and drying a biomass raw material to obtain a pretreated material; 2, pre-carbonizing and carbonizing to obtain charcoal particles; 3, introducing water vapor to activate the biochar particles to prepare activated carbon particles; 4, mixing and kneading the activated carbon particles and an additive, extruding into strips, and drying to obtain an activated carbon carrier; 5, dipping the activated carbon carrier with alkali to obtain a desulfurizer; the desulfurizer is applied to removal of sulfides in industrial feed gas. According to the desulfurizer, the biomass raw material serves as a carbon source, sufficient adsorption sites and alkaline catalysis sites are provided through water vapor activation pore forming and impregnation loading of alkali components, the desulfurization performance of the biomass-based activated carbon desulfurizer is improved, and the desulfurizer is suitable for deep desulfurization of industrial gas with high CO2 content and containing organic sulfur and inorganic sulfur; the raw materials are renewable, the desulfurization performance is excellent, the application range is wide, the precision is high, and the preparation process is green and environment-friendly.

The utility model discloses a carbon emission monitoring device for a thermal power plant, which comprises a collection pipe, a first end of which is used for being inserted into a flue to be detected; the heating assembly is arranged on the periphery of the second end of the collecting pipe; the filter is arranged in the collecting tube; and the gas analysis unit is connected with the second end of the collecting pipe and can detect the CO2 concentration of the gas collected by the collecting pipe. According to the utility model, the CO2 content in the gas can be detected in a severe environment.

The invention provides a fluid identification method and device, terminal equipment and a machine readable storage medium, and belongs to the field of oil exploration, and the identification method comprises the steps: determining a research sample well logging curve, a research sample gas logging curve and well drilling detection parameters; establishing a shallow resistivity and deep resistivity cross plot based on a research sample logging curve, and identifying water from unknown fluid; establishing a derivative parameter cross plot by using the research sample gas logging curve; establishing a density porosity and neutron porosity semi-quantitative evaluation CO2 content chart and a density porosity and porosity difference semi-quantitative evaluation CO2 content chart by utilizing a research sample well logging curve and well drilling detection parameters; and identifying CO2, condensate gas and oil in the unknown fluid based on the derived parameter cross plot, the CO2 content chart of the density porosity and neutron porosity semi-quantitative evaluation and the CO2 content chart of the density porosity and porosity difference semi-quantitative evaluation. Through the method provided by the invention, the unknown fluid can be accurately identified, and the well logging interpretation evaluation precision is improved.

The application discloses a method for extracting helium from low-helium-containing natural gas and co-producing ethane, relates to the technical field of helium extraction from natural gas, and specifically relates to a method for extracting helium from low-helium-containing natural gas and co-producing ethane, which comprises the following steps: raw gas decarburization: CO2 in pressurized raw gas is absorbed by activated MDEA solution, and the CO2 content is removed to below 50 ppm; raw gas dehydration and mercury removal: dehydration and mercury removal are performed by using a three-tower isobaric molecular sieve dehydration and mercury removal process, and a purified gas with a water content of less than or equal to 1 ppm and a mercury content of less than 0.01 mu g / m3 is obtained; natural gas helium extraction. The application adopts three external mixed refrigerant refrigeration cycle systems such as a mixed refrigerant precooling process without expansion refrigeration, the system has rich regulation means, can provide matched cold energy for a crude helium extraction process, is flexible in operation, and is good in adaptability to raw materials; the natural gas helium extraction is simultaneously used for co-producing ethane and other light hydrocarbon products, and the energy consumption of a demethanizer gradient multi-stream side line extraction process device is greatly reduced.

The present application relates to the field of natural gas decarburization, and discloses a decarburization solvent, a decarburization method and system of carbon-containing natural gas, the decarburization solvent comprising a main agent, an activator and an auxiliary agent; wherein the main agent is N-methyldiethanolamine, the activator comprises a primary amine and a secondary amine, and the auxiliary agent is selected from at least one of potassium sorbate, sodium sorbate and sodium sulfite.The decarburization solvent and the decarburization method provided by the present application can not only make the absorption and regeneration equipment flexible to follow the change of the CO2 content of the raw gas in the natural gas development process and expand, but also avoid the corrosion and foaming of the tower equipment in the conventional process; meanwhile, the absorption and regeneration performance of the decarburization solution can be improved under the condition of meeting the purification index, and the regeneration heat consumption and the power consumption for pressurization of the amine liquid circulation can be greatly reduced.

This invention provides an enclosure experimental device and method for measuring carbon sequestration in shellfish and algae, comprising: a stabilizing component, an enclosure component, a collection component, and a collection device; the stabilizing component is fixed on a marine aquaculture area, and multiple enclosure components are arranged inside the stabilizing component, each enclosure component containing a collection component for collecting shed material from aquaculture organisms; the collection device is mounted on the stabilizing component, with its lower end positioned above the collection component, and its upper end connected to a monitoring instrument via an air tube, the monitoring instrument being configured to measure the CO2 content of the air above the collection device. This invention can simulate a real marine aquaculture environment, enabling better collection of biological shed material and gas data, and improving the accuracy and scientific rigor of carbon sequestration measurement.

The invention discloses a process and a device for preparing LNG (Liquefied Natural Gas) and co-producing carbon dioxide from coke oven gas, belonging to the field of chemical industry. The coke oven gas subjected to fine desulfurization is divided into two paths, the first path directly enters a methanation section, the second path enters a CO conversion tower, CO is converted into CO2 through a water gas conversion reaction, and H2 is generated at the same time; the converted gas is cooled by a heat exchanger I2 or a steam boiler and then enters an alcohol amine decarburization tower, CO2 is partially or almost completely removed by spraying an alcohol amine solution, and the alcohol amine solution is heated and regenerated to obtain high-purity CO2 as a chemical raw material; the decarburized gas and the first path of gas are converged and then enter a methanation section, and H2 reacts with CO and CO2 in three methanation reactors which are connected in series and in parallel to generate CH4. The device comprises a main pipeline, a CO conversion tower, a heat exchanger, an alcohol amine decarbonization tower, an alcohol amine regeneration tower, a methanation reactor and the like. According to the invention, large-air-volume circulation and a compressor are avoided, the cost is saved, high-purity CO2 is co-produced, the CO / CO2 content and temperature rise can be flexibly regulated and controlled, and temperature runaway is prevented.

The utility model provides a phosphorous acid total organic carbon detection device, which relates to the technical field of total organic carbon detection devices, and comprises a pretreatment component, an acidification bin and a dilution bin communicated with the lower part of the acidification bin, a first one-way valve and a second one-way valve are fixedly arranged at the bottoms of the acidification bin and the dilution bin respectively, and an acid storage tank and a pure water tank which can be controlled to be opened and closed are communicated with one sides of the acidification bin and the dilution bin respectively; a combustion pipe communicated with the bottom of the dilution bin is contained in the high-temperature oxidation assembly, a cracking furnace is fixedly arranged outside the combustion pipe in a surrounding mode, and an oxygen inlet pipe is arranged on the side wall of the cracking furnace in a communicated mode; the condenser and the dryer are communicated with the outlet end of the combustion pipe; the detection assembly comprises a detection bin communicated with the outlet end of the dryer, a high-sensitivity sensor for detecting the CO2 content and converting the CO2 content into an electric signal is arranged in the detection bin, and one side of the high-sensitivity sensor is electrically connected with a processor for processing the electric signal and outputting a detection result.

The invention discloses a direct reinjection device for CO2 flooding produced gas, which is characterized in that an electric block valve, an electromagnetic heater, a gas-liquid separator, a molecular sieve dehydration pry, supercritical compression equipment and a reinjection unit are sequentially arranged along a flow node of the CO2 flooding produced gas, and an outlet of the reinjection unit is connected into a specified well; one bottom outlet of the gas-liquid separator is connected into the gathering and transporting system, the other bottom outlet of the gas-liquid separator is connected into the closed sewage tank, and the bottom outlets of the molecular sieve dehydration pry are connected into the closed sewage tank. The invention further discloses a direct reinjection method for CO2 flooding produced gas. The invention belongs to the technical field of carbon capture, burying and utilization, and solves the problems in the prior art that in the CO2 flooding extraction process, CO2 flooding extraction gas is high in CO2 content, the pressure in the open flow stage is high, and the extraction gas is difficult to enter a gas collection system. And the problems that in the prior art, CO2 drive produced gas is large in flow, high in CO2 content, large in fluctuation range and high in treatment cost are solved.

The application discloses a limestone fluidization calcination method and fluidization calcination furnace based on carbon stepwise circulation, wherein hot air with high temperature and high CO2 content after high-temperature decomposition of limestone is selectively returned to the atmosphere of different stages of initial decomposition of limestone in a stepwise circulation mode, so that the content of effective calcium oxide in the product is increased while the limestone pyrolysis efficiency is improved, the concentration of CO2 in the exhaust gas is increased, and the heat of the initial pyrolysis is assisted, which creates favorable conditions for the capture and recovery of CO2, significantly reduces carbon emission and energy consumption, and the method and system have the advantages of short process, easy control, low investment cost, significant economic benefits and the like, and provide a new way for resource utilization of waste fine limestone.

This utility model discloses a fluidized bed gasification system, which includes a fluidized bed gasifier and a cooling device, a first dust removal device, and a cooling and scrubbing device connected in series at the syngas outlet of the fluidized bed gasifier. The cooling device is used to cool the syngas flowing out of the syngas outlet of the fluidized bed gasifier. The first dust removal device is used to collect fly ash from the syngas flowing out of the cooling device. The cooling and scrubbing device is used to wash the fly ash from the syngas flowing out of the first dust removal device. Based on the fluidized bed gasification system of this utility model, the resulting net syngas has a high CO content, low H2 and CO2 content, small wastewater and circulating water volume, low syngas dew point, and low heat loss from the gasifier.

Provided are a fluid identification method and system, a terminal device, and a machine-readable storage medium, belonging to the field of petroleum exploration. The method comprises: determining a study sample logging curve, a gas logging curve and drilling detection parameters; on the basis of the study sample logging curve, establishing a shallow resistivity and deep resistivity cross plot, and identifying water from among unknown fluids; using the gas logging curve to establish a derived parameter cross plot; using the study sample logging curve and the drilling detection parameters to establish a semi-quantitative evaluation chart of CO2 content based on density porosity and neutron porosity, and a semi-quantitative evaluation chart of CO2 content based on density porosity and porosity difference; on the basis of the derived parameter cross plot, the semi-quantitative evaluation chart of CO2 content based on density porosity and neutron porosity, and the semi-quantitative evaluation chart of CO2 content based on density porosity and porosity difference, identifying CO2, condensate gas and oil in the unknown fluids. By means of the provided method, unknown fluids can be accurately identified, and logging interpretation evaluation accuracy is improved.

The invention discloses a wellhead carbon dioxide trapping system and method. The wellhead carbon dioxide trapping system comprises a feed gas buffer tank, a filter, a heater and a gas membrane separator which are connected in sequence, the low-pressure output end of the gas membrane separator is connected with the input end of a CO2 storage tank, and the high-pressure output end of the gas membrane separator is connected with a product gas surface pipeline. The method comprises the following steps: carrying out primary gas-liquid separation on coal bed gas raw material gas with high CO2 content through a raw material gas buffer tank, then feeding the gas into a filter for fine separation, filtering to remove liquid drops and solid particles carried in the gas, and ensuring that the residual oil / liquid content is smaller than a set value; the coal bed gas treated by the filter enters a heater, is heated and then enters a gas membrane separator for separation; coalbed gas rich in CO2 enters a gas membrane separator, high-pressure product gas separated by a gas membrane enters a downstream surface pipeline, and low-pressure permeated gas separated by the gas membrane enters a CO2 storage tank. And the CO2 capture rate is ensured, the ground corrosion protection investment is reduced, and repeated utilization in different well sites is realized.

A direct air capture (DAC) process for capturing CO2 from a stream of air by passing air through a capture unit comprising a sorbent structure The sorbent structure comprises an active component comprising sodium aluminate in an amount from 5 wt% and up to 40 wt% and a metal-containing support in an amount of at least 55 wt%, both based on the weight of the sorbent structure. The metal-containing support is selected from the group consisting of a metal alloy, metal oxide, metal-non-metal alloy, a ceramic material, and any combination thereof. The method further comprises capturing the carbon dioxide by the sorbent to provide a treated stream of air with less carbon dioxide exiting the capture unit.

The utility model belongs to Hismelt ironmaking technical field, concretely relates to a kind of Hismelt ironmaking coal gas pipeline. Coal gas pipeline includes the lead-out pipe connected with reduction furnace, riser, downcomer and diffusion valve, the downcomer is connected with gravity dust collector;At least one branch of coal powder spray gun is equipped on the coal gas pipeline, the coal powder spray gun is inserted into pipeline by passing through coal gas pipeline wall, and is connected with coal gas pipeline by flange;The cooling water pipe is arranged in the form of membrane wall in the inner wall of the coal gas pipeline;The diffusion valve is arranged at the connecting place of riser and downcomer, for balancing the pressure in coal gas pipeline, prevent pressure from suddenly rising.The realized effect is: CO2 content in coal gas reduces 3.7%, CO content increases 5.1%, and the calorific value of coal gas increases 26%;Increase the outlet angle of coal gas pipeline lead-out pipe, it is favorable for slag iron in coal gas pipeline to flow back into SRV, solve the problem of lead-out pipe accumulated slag iron.

The invention discloses a CO2-rich natural gas electro-thermal catalytic coupling reforming method. Methane and excessive carbon dioxide (CO2 / CH4gt; the mixed gas obtained in the step (1) is introduced into a cathode of a solid oxide electrolytic tank, and series coupling of three reactions of methane dry reforming, reverse water vapor shift and water electrolysis on the cathode side can be realized by applying external current, so that high CH4 conversion rate, high CO2 conversion rate and high H2 selectivity are obtained. According to the method, the natural gas with high CO2 content is completely converted into the synthesis gas in one step in a single reactor, a high-energy-consumption separation process is avoided, the problems of low CO2 utilization rate, low H2 selectivity, complex process, greenhouse gas emission and the like of a traditional carbon-rich natural gas conversion technology are solved, and the method has the advantages of high efficiency, economy, environmental protection and the like and is suitable for industrial production. The method has a wide application prospect in the fields of conversion and utilization of natural gas and storage of renewable electric energy.

The invention belongs to the technical field of oil and gas field development, and discloses a method for determining the lower limit of the CO2 content in CO2 flooding development reinjection gas, which comprises the following steps: S1, investigating the CO2 content range in the block output gas; s2, designing gas reinjection schemes with different CO2 contents; s3, through a crude oil component model / indoor test, MMP after the reinjection gas with different CO2 contents is in contact with the in-situ crude oil is obtained; s4, drawing an intersection by taking the CO2 content as an x axis and MMP as a y axis; and S5, analyzing to obtain the lower limit of the CO2 content when the reinjection gas is in contact with the in-situ crude oil to achieve a mixed phase. According to the method, the process of judging whether the produced gas containing CO2 can be used as the reinjection gas or not is systematically elaborated on the basis of actual data of the mine field in a numerical simulation or indoor experiment development mode, the judgment hysteresis in the mine field practice process is eliminated, the problem that CO2 is used as a newly-developing large thermal oil displacement medium but is insufficient in experience is solved to a certain extent, and the method is suitable for popularization and application. And a new thought is provided for treating CO2-containing output gas in a subsequent mine field.

The present disclosure is directed to metal ion-containing zeolitic compositions having MOR topology that are useful for scavenging CO2 from Iow-CO2-content feed, streams, including air, and method of making and using the same.

The invention relates to an oxygen-enriched combustion method and device. Circulating flue gas and to-be-converted flue gas are led out from furnace top flue gas; when the CO2 content in the to-be-converted flue gas is not lower than a specified threshold value, the to-be-converted flue gas is used as CO2-rich gas to be fed into a CO2 electrochemical catalytic conversion unit; and when the CO2 content in the to-be-converted flue gas is lower than the specified threshold value, leading out to-be-captured flue gas from the to-be-converted flue gas. The device comprises an industrial furnace, a CO2 trapping unit, a CO2 electrochemical catalytic conversion unit and a gas-gas mixer. By means of the oxygen-enriched combustion method and device, the operation mode and the smoke flow direction of the device can be flexibly set, and the problems that in the prior art, nitrogen oxide is continuously generated through single air combustion supporting, smoke exhaust heat loss is large, the concentration of CO2 in combustion products is low, trapping and utilization are not facilitated, the combustion supporting mode is single, and the combustion efficiency is low are solved. And a matched CO2 treatment facility is lacked.

The invention relates to the technical field of salt manufacturing brine purification, in particular to a calcium type brine coupling synthesis ammonia low-A tail gas purification process which comprises the following steps: pumping raw brine from a mine and mother liquor returned by a salt manufacturing workshop into a primary reaction clarification tank, adding sodium sulfate and a calcium hydroxide solution for reaction, and precipitating Mg < 2 + > and part of Ca < 2 + > in the brine; and pumping the clear liquid into a secondary reaction clarification tank, introducing CO2 tail gas generated by a synthetic ammonia low-temperature methanol washing process to perform carbonization reaction, controlling the reaction endpoint, supplementing sodium carbonate to completely precipitate Ca < 2 + > into calcium carbonate, and clarifying to obtain refined brine. Ammonia synthesis low-temperature methanol washing CO2 tail gas is adopted to replace flue gas of a power plant boiler, and CO2 is provided for salt manufacturing brine purification; and the synthesized low-methane tail gas is relatively high in CO2 content and relatively pure in component, so that the effects of reducing the brine purification cost and recycling CO2 are achieved, and the influence of dust, escaping ammonia, heavy metal ions and the like contained in the flue gas of the power plant boiler on the quality of a salt-making finished product can be avoided.

A container for determining the quantity of CO2 absorbed and / or expelled by a sample of matter over time, including: a bottom compartment designed to receive a sample of matter, a top compartment receiving element for trapping CO2, positioned in line with and communicating with the bottom compartment, and having an exhaust opening enabling gas to escape from the top compartment after it passes through the receiving element for trapping CO2, a separation element, disposed between the bottom compartment and the top compartment, configured to enable gas to pass from the bottom compartment to the top compartment.

This invention relates to the field of methanol regeneration technology, and particularly to a system and method for reducing the amount of steam used in methanol regeneration. It includes: a secondary stripping unit for secondary stripping of CO2 from the methanol-rich solution in the original production system; a pipeline assembly connected to both the original production system and the secondary stripping unit, which introduces nitrogen and the methanol-rich solution from the original production system into the secondary stripping unit for stripping, and introduces the CO2 generated in the secondary stripping unit back into the original production system; the pipeline assembly also processes the methanol-rich solution generated in the secondary stripping unit before introducing it back into the original production system; and a valve control assembly; the valve assembly is installed on the pipeline assembly and is used to control the flow of the methanol-rich solution and gas within the pipeline assembly. This system can reduce the CO2 content in the methanol-rich solution, reduce the amount of steam used in methanol regeneration, and reduce steam consumption.

This invention discloses a packaging production method for carbonated, foamy, and alcoholic beverage liquids, belonging to the field of beverage packaging technology. The method includes conveying the bottle to a linearly arranged filling machine, first evacuating the bottle to ensure a vacuum level ≤ -0.085 MPa, then first injecting carbon dioxide into the bottle for pressurization; then evacuating the bottle a second time, injecting carbon dioxide a second time for pressurization, and filling the bottle to the nominal capacity, followed by depressurization; the foaming nozzle is perpendicular to the operating table, and the foam is sprayed in a concentrated linear pattern, directly into the center of the bottle neck; when the foam just overflows to the bottle neck, the bottle is quickly capped and sealed. This invention, applied to beverage packaging, solves the technical problems of producing large-sized (≥700mL), carbonated, high-foaming liquids, and can meet the filling requirements of large-capacity beer bottles and high CO2 content products, while ensuring the long-term freshness, sealing, and safety of the product.

This disclosure relates to a CO2 mineralization curing device and its safety device, which includes a breathing valve body, a CO2 concentration detector, and a fresh air system. The breathing valve body has an internal cavity and is positioned above the CO2 mineralization curing device. The breathing valve body has a first connecting port, a second connecting port, and a third connecting port communicating with the cavity. The first connecting port connects the cavity to the interior of the CO2 mineralization curing device, while the second and third connecting ports connect the cavity to the outside. The second connecting port allows outside gas to be drawn into the cavity, and the third connecting port allows gas to be discharged from the cavity to the outside. The CO2 concentration detector is positioned inside the cavity and is used to detect the CO2 content within it. The fresh air system includes a control unit and a ventilation assembly. The control unit controls the ventilation assembly to introduce fresh air into the cavity based on the signal monitored by the CO2 concentration detector, thereby diluting the CO2 concentration in the cavity.

The present application belongs to the technical field of geothermal energy exploitation, and particularly relates to a method for determining the content of carbon dioxide in a geothermal reservoir. The method comprises the steps of: obtaining the field test results of the temperature-pressure profile of a wellbore in a static state and a blowout state; establishing a two-phase phase transition flow model of a CO2-H2O system in a medium-high temperature geothermal wellbore including a flash evaporation process; giving a CO2 content analysis range and dividing it into segments, taking a parameter point in each segment to obtain temperature-pressure prediction results through the two-phase flow model; comparing the prediction results with the field test results to draw a curve of the error and the parameter variation, and the point with the minimum error is the optimal solution of the CO2 content; the two-phase flow model established in the present application has a wide range of application and small error, and can serve the prediction of the dryness and flash evaporation depth in the wellbore, and provide an important basis for the productivity prediction of geothermal wells and the evaluation of scaling prevention and scaling removal; the present application uses the temperature-pressure measured data of the whole wellbore, the sampling is representative and sufficient, and the implementation process is simple and has good accuracy.

The application relates to the technical field of boilers, in particular to a carbon-based fuel partial gasification coupled boiler system and a carbon-based fuel combustion method. A high-temperature gas-solid mixture is generated in a gasification chamber of a gasifier, and the high-temperature gas-solid mixture is sprayed into a boiler from a gasification chamber outlet for combustion. The carbon-based fuel is partially gasified through the gasifier, the fuel can be preheated to above 1000 DEG C, the combustion stability problem of (ultra) low-volatile carbon-based fuel can be solved, flue gas discharged from the boiler is recirculated to a feeding assembly, the gasifier and the boiler through a pipeline, the flue gas is mixed into a gasification agent and a combustion-supporting agent, the CO2 content in the flue gas can be increased to above 90%, CO2 collection is facilitated, and high-efficiency, low-nitrogen and low-carbon combustion and utilization of the carbon-based fuel are realized.

The invention discloses an unmanned ship for water quality regulation of an intensive culture fishpond and a water quality regulation method, and relates to the technical field of water quality regulation. The unmanned ship comprises an unmanned ship body and a ship cover covering the top of the unmanned ship body. A circulation execution module used for driving the unmanned ship body to move and breaking thermal stratification of a water body in a fixed-point operation mode, a carbon sequestration module used for conducting acid neutralization and carbon sequestration on the water body and an oxygenation module are arranged in the unmanned ship body, and a sensor array used for detecting the water body is arranged at the bottom of the unmanned ship body; the sensor array comprises a non-dispersive infrared sensor, a filmless fluorescence method sensor and a temperature sensor which are installed at the bottom of the unmanned ship body. The problems of acidification and physiological oxygen deficit of aquaculture water are solved from the source by regulating and controlling the content of CO2 in the water, and meanwhile, three-dimensional collaborative treatment of water quality is achieved in cooperation with efficient oxygen supplementation of the oxygenation module and water circulation disturbance of the circulation execution module.

The application discloses a low-temperature methanol washing system and method based on preposed CO2 separation and high H2S partial pressure desulfurization. The system comprises a raw material gas pretreatment unit, a preposed high-pressure CO2 liquefaction separation unit, a high partial pressure desulfurization and decarburization unit, a liquid CO2 decompression evaporation and cold quantity recovery unit, a carbon dioxide product desulfurization unit, a methanol regeneration unit and a methanol distribution and temperature control optimization system. By arranging the CO2 condensation separation before desulfurization and adopting segmented methanol circulation and independent control, the desulfurization efficiency is greater than or equal to 99.9%, the CO2 content in the high-pressure absorption raw material gas is reduced by 20%-65%, the lean methanol circulation amount is reduced by 15%-35%, the sulfur-containing rich methanol amount is reduced by 20%-50%, the system energy consumption is reduced by 12%-31%, and the total sulfur content of the exhaust gas is less than or equal to 3.0 ppm. The method provided by the application has the advantages of great operation flexibility, safety and reliability, high product purity and high recovery rate, and is high in energy saving and environmental protection.

The invention discloses a fracturing coalbed methane reservoir flowback fluid separation and continuous metering device, and relates to the technical field of fracturing coalbed methane reservoir flowback fluid treatment. Comprising a primary separator, a secondary separator, a gas-liquid control system, a gas flowmeter, a liquid flowmeter, a CO2 content tester, a CH4 content tester, a CO2 gas separation membrane, a CH4 gas separation membrane, a digital display control screen, a data acquisition and remote transmission device, a pipe valve, a solar temperature control system and the like. After a coal bed gas reservoir is fractured by CO2, flowback fluid flows into the device through an inlet, data such as liquid flow, gas flow and CH4 and CO2 content in gas in the flowback fluid are obtained through a series of processing and data acquisition, and CH4 and CO2 gas are separated.

The utility model belongs to the technical field of energy recycling, and particularly relates to a system for preparing liquefied natural gas by utilizing marsh gas. According to the utility model, NH3 and H2S gases are removed by utilizing the water washing device and the alkali washing device, so that the heat consumption of the device is reduced, then the CO2 content is reduced to be below 20ppm by utilizing the vacuum pressure swing adsorption decarbonization component and the amine liquid deacidification component, the heat consumption of the device is greatly reduced while the CO2 removal precision is met, and then water in the gases is removed by utilizing the dehydration device, so that the energy consumption of the device is reduced. The methane content in the prepared natural gas reaches 99% or above, the combustion heat value of biogas is greatly increased, the process is mature, and stable and continuous production can be achieved.