102 results about "Carbon dioxide flux" patented technology

The present invention relates to the selective separation of carbon dioxide (“CO2”) from nitrogen (“N2”) in streams containing both carbon dioxide and nitrogen utilizing a zeolitic imidazolate framework (“ZIF”) material. Preferably, the stream to be separated is fed to the present process in a substantially gaseous phase. In preferred embodiments, the current invention is utilized in a process to separate carbon dioxide from combustion gas (e.g., flue gas) streams preferably for sequestration of at least a portion of the carbon dioxide produced in combustion processes.

A device as described for the generation of high purity carbon dioxide (CO2) and hydrogen (H2) by electrochemical decomposition of aqueous solutions of liquid and solid organic acids. A d.c. power source is used to apply a preselected current to an electrochemical cell, consisting of an ion permeable membrane and two electrodes. The generation rate of CO2 and H2 is continuous and proportional to the applied current; it can be stopped instantaneously by interrupting the current. Small Battery operated generators can produce propellant CO2 and H2 to deliver fluids from containers. Other uses include the creation of anaerobic environments in incubation chambers.

The invention discloses a device for synchronously monitoring the concentration of carbon oxide and carbon dioxide, which belongs to the technical field of gas concentration detection. The invention aims to solve the problems that the prior spectroscopy gas detection has high cost due to using a single-mode diode laser and the output wavelength is sensitive to the change of working temperature. Output ends of a sawtooth generator and a sine wave generator of the device are connected with an input end of a power divider respectively; an output end of the power divider is connected with an input end of a current controller; output ends of the current controller and a temperature controller are connected with an input end of a tunable multimode diode laser respectively; output light of the tunable multimode diode laser is incident into a collimating lens, transmitted light which passes through the collimating lens is orderly incident onto three branches formed by spectroscopes, gas cells, focusing lenses and photoelectric detectors; and output ends of the photoelectric detectors are connected to a data acquisition card respectively, and then the data acquisition card is connected with a computer through a PCI slot. The device is used for monitoring the concentration of the carbon oxide and the carbon dioxide.

The invention discloses a situ determination method and device of carbon dioxide flux in soil. This invention is based on the principle of convection and diffusion between the soil and air, using scale-marked drill pipe vertically drill from the soil surface downward, obtain carbon dioxide samples from different soil depth through sampling rod, directly to the apparatus, according to the physical property that infrared has special absorption to carbon dioxide gas, regularly measure the concentration of carbon dioxide that soil of different depth released or absorbed. Substitute the concentration value of carbon dioxide at different soil depth into formula, and then flux of carbon dioxide of unit area in unit time at certain depth under standard atmospheric pressure can be obtained. The invention can be used for observations of carbon dioxide flux, detection of carbon dioxide storage under different depths in natural state, calculation of variation of carbon dioxide emission induced by land-use changes and evaluation of restore rate of plant cover and land capability.

The invention discloses a method for sequestering carbon dioxide. The method includes the following steps: (1) selecting the injection layer which includes an unworkable seam and / or a coal seam gob; (2) drilling a well according to the position where the injection layer is located; (3) performing perforating for a fissure zone of a top plate of the unworkable seam and / or the coal seam gob; (4) sequentially injecting carbon dioxide from bottom to top layer by layer when the number of the needed injection layer is larger than one, and performing injecting and sealing storage for the next injection layer after completing injecting and sealing storage for the former injection layer; and (5) burying the drilled well and sealing a cover on the drilled well. The method for sequestering carbon dioxide aims at solving the problems of large carbon dioxide emission, obvious greenhouse effect, complex processing procedures, high expanse and the like of the existing coal power generation mode, and achieves the purposes of permanently sequestering carbon dioxide and reducing carbon dioxide treatment expanse by adopting the carbon dioxide sequestering method of injecting carbon dioxide gases into the unworkable seam or the coal seam gob to sequester carbon dioxide.

The invention discloses a carbon dioxide stamping phase change detonation fracturing system and a method thereof, and relates to the field of development and utilization of unconventional oil and gas resources in underground deep-buried reservoirs. The system is characterized in that a supporting and protecting casing pipe (D-1) is arranged at a vertical section of a drilled well (D); a directed casing pipe (9) is arranged at a horizontal section of the drilled well (D); a mixture generator (6), a packer (7), an electric spark ignition device (8) and a jet hole (10) are arranged in the directed casing pipe (9) from left to right in sequence; an energy concentrator tank body (2) and a supporting agent tank body (3) are respectively connected with a boosting pump (4) through pipelines; and a carbon dioxide tank body (1) and the boosting pump (4) are respectively connected with the mixture generator (6) through injection pipelines (5). The carbon dioxide stamping phase change detonation fracturing system can fully use high-energy impact waves generated by detonation of carbon dioxide and an energy concentrator to enable rocks in the reservoirs to generate fractures, and the high-energy impact waves can be adjusted according to a fracturing demand; and reaction raw materials adopted by the system are pollution-free to the environment.

A device as described for the generation of high purity carbon dioxide (CO2) and hydrogen (H2) by electrochemical decomposition of aqueous solutions of liquid and solid organic acids. A d.c. power source is used to apply a pre-selected current to an electrochemical cell, consisting of an ion permeable membrane and two electrodes. The generation rate of CO2 and H2 are continuous and proportional to the applied current; it can be stopped instantaneously by interrupting the current. Small battery operated generators can produce propellant CO2 and H2 to deliver fluids from containers other uses include the creation of anaerobic environments in incubation chambers.

The invention discloses a method for maintaining porous concrete through carbon dioxide. The method includes the following steps: (1) concrete is mixed and formed; (2) an obtained initial concrete body is placed into a pre-maintenance device for pre-maintenance, wherein the pre-maintenance temperature ranges from 15 DEG C to 25 DEG C, and the relative humidity ranges from 50% to 70%; air circulates through an air blower or a fan, wherein the pre-maintenance time ranges from 1 h to 18 h; (3) when the residual water-cement ratio of the mixed material body obtained after pre-maintenance reaches a preset residual water-cement ratio, the mixed material body is placed into a CO2 maintenance container, vacuumizing is carried out, then CO2 gas is led into the CO2 maintenance container for CO2 maintenance, the gas is discharged after maintenance is completed, and maintenance is stopped. By means of the method, control over the moisture content of the concrete body can be achieved, the carbon dioxide gas absorption capacity of the concrete can be effectively improved, and the quality of a concrete product can be effectively improved; in addition, the waste greenhouse effect gas, namely the carbon dioxide gas can be effectively used, the emission of the greenhouse gas can be reduced, the environment can be protected, and the greenhouse effect can be suppressed.

The invention discloses a spatial analysis method for influence between carbon dioxide emission elements under the condition of precise temporal and spatial scales. The spatial analysis method includes determining carbon dioxide emission spatial ranges by the aid of carbon dioxide flux observation points; calculating carbon dioxide flux in the carbon dioxide emission spatial ranges; carrying out gridding division on the carbon dioxide emission spatial ranges; calculating carbon dioxide solid emission elements one by one in the carbon dioxide emission spatial ranges; identifying carbon dioxidesolid emission element primary attributes of each grid unit and solving carbon dioxide flux influence factors of the various carbon dioxide solid emission elements by the aid of multiple regression analysis processes according to the carbon dioxide flux and calculation data; combining the influence factors with one another, carrying out buffer analysis on the grid units and determining the influence between the carbon dioxide solid emission elements and influence on carbon dioxide flux of integral target regions.

The invention relates to a backflow type hydrogen matrix bio-membrane reactor with carbon dioxide serving as a carbon source. The backflow type hydrogen matrix bio-membrane reactor comprises a reactor barrel body (24), wherein a water outlet (8) and a backflow port (23) are formed at the upper end of the reactor barrel body (24); a water inlet (27) and an emptying port (4) are formed at the lower end of the reactor barrel body (24); an 1# membrane module for feeding H2 and a 2# membrane module for feeding CO2 are arranged in the reactor barrel body (24); and membrane silks for forming the membrane modules are marketed PVDF (Polyvinylidene Fluoride) hollow fiber membranes which have outside diameter of 1.0 to 3.0mm, inside diameter of 0.5 to 1.5mm and membrane pore size of 0.01 to 0.4 microns. The backflow type hydraulic matrix bio-membrane reactor is reasonable in structure and good in treatment effect; CO2 can provide the carbon source for oligotrophic underground water and can stabilize the pH (Potential Of Hydrogen) of the environment; and the membrane aeration promotes the gas to dissolve in the water phase, thus the utilization rate of the gas can be improved, and the overflowing and waste of CO2 in the conventional aeration method can be avoided; the inner part of the reactor is kept in a complete mixing state by a backflow system, thus the benefit is provided for removing pollutants; the upper end and the lower end are used for ventilating, so that the shortcomings that the gas cannot be uniformly spread due to the on-way resistance and the utilization rate is low can be avoided; and the membrane can be cleaned without disassembling the membrane modules. The backflow type hydrogen matrix bio-membrane reactor with the carbon dioxide serving as the carbon source can be used for effectively treating oxidation pollutants in the underground water.

The invention discloses an iron casting digging-replacement welding repair method. The method comprises the following steps that (1) a damaged part of an iron casting is cut off through plasma cutting, and a replacement insert is manufactured through a steel plate according to the shape of the cut part; (2) according to the thickness of the steel plate, a cut iron casting kerf and the edge of thereplacement insert are grooved and ground cleanly, and brand-new base metal is exposed; and (3) carbon dioxide arc welding machine is adopted, power source poles adopt the direct current electrode positive mode, molten pool protection gas is 100% carbon dioxide, a carbon dioxide flux-cored wire is adopted, carbon-dioxide arc welding is conducted at the room temperature, and the replacement insertis connected to the iron casting in an inserted mode. The method is simple in process, convenient to operate, easy in welding and good in fusing performance, through the repair method, the iron casting can be repeatedly used, resources are saved, the ship repair period is shortened, components scrapped due to corrosion and rotting are reduced, cost of shipowners is reduced, and the ship repair cost is reduced.

The invention relates to the field of utilization and conversion of carbon dioxide, in particular to a preparation method of gathering and catalytic cyclic utilization of carbon dioxide. The method includes that carbon dioxide which is gathered from smoke and generated through pyrolysis is catalyzed by high-power plasma to generate carbon monoxide, and the carbon monoxide is gathered and recycled after being used for combustion or industrial application. The method had the advantages that through the synergistic effect of carbonic acid, catalysts, active agents, the gathering efficiency of the carbon dioxide is obviously promoted, the carbon dioxide is decomposed by solution rapidly to reduce decomposition cost, under the synergistic effect of the plasma, the catalysts and the active agents, the conversion temperature of the carbon dioxide is obviously reduced, the conversion ratio of the carbon dioxide is obviously promoted, the method is energy-saving and environment-friendly, saves fire coal by 10-85% and achieves near zero release of the carbon dioxide, the equipment investment is small, the carbon dioxide resource can be gathered, converted and recycled by a large amount, and the method is suitable for large-scale energy conservation and environmental protection in the major coal consumption industries.

The invention relates to a method for trapping carbon dioxide in cement kiln flue gas and generating by carbon dioxide. The method comprises the following steps: 1) purification of flue gas; 2) membrane separation for enriching CO2; 3) continuous trapping of CO2; 4) liquefaction storage of CO2; 5) energy storage of supercritical CO2 fluid; 6) tempering and generating by supercritical CO2; and 7) circulation of supercritical CO2 and back heating utilization. The method aims at the technical equipment characteristic of a cement production line and flue gas composition characteristic, waste heat energy produced during a cement production process and / or high temperature heat energy which can generate unfavorable influence are taken as main energy for realizing carbon dioxide trapping and supercritical CO2 generating, and the method has the advantages of low self-energy consumption, low investment, and low operation cost.

The invention discloses a carbon dioxide-energy gathering agent detonation impacting phase-change jet device and a method thereof and belongs to the field of development and utilization of unconventional oil and gas resources of reservoirs deep underground. The device comprises an energy gathering agent storage tank, a carbon dioxide storage tank, a mixture generator, an injection pump and a detonation jet unit. The energy gathering agent storage tank and the carbon dioxide storage tank are connected with the mixture generator through pipelines, and the mixture generator, the injection pump and the detonation jet unit are sequentially connected. The method comprises the steps of (1) energy gathering agent preparation, (2) equipment arrangement, (3) burning agent injection, (4) burning agent ignition, (5) repetitive operation and (6) effect monitoring. According to the carbon dioxide-energy gathering agent detonation impacting phase-change jet device and the method thereof, high energy shockwaves generated by carbon dioxide and the energy gathering agent are fully utilized to enable reservoir rocks to generate fractures, deploy can be conducted according to the fracture requirements, and reaction raw materials adopted by the device have no pollution to the environment.

The invention discloses a dense oil well carbon dioxide front energy storage composite sand adding fracturing method. The dense oil well carbon dioxide front energy storage composite sand adding fracturing method comprises the following steps that (1) a ground surface flow is connected, and pressure testing is conducted on the ground surface flow; (2) liquid carbon dioxide is subjected to pump injecting, and circulating cooling is conducted on the ground surface flow; (3) pump injection construction is conducted on a mixture of slickwater and the liquid carbon dioxide, a pure liquid carbon dioxide, cross-linked fracturing fluid and cross-linked fracturing fluid with sand in sequence; (4) fracturing liquid flowback is conducted; (5) well shut-in is conducted; and (6) blowout testing is conducted. According to the dense oil well carbon dioxide front energy storage composite sand adding fracturing method, the liquid carbon dioxide is combined with the conventional fracturing liquid whilea construction requirement for dense oil fracturing transformation is met and the construction safety is guaranteed, the productivity effect after pressure is effectively improved, and the target of afracturing technology is achieved.

The invention belongs to the technical field of oil-gas field development and discloses a method for measuring diffusion coefficient of carbon dioxide in crude oil. The method includes following steps: 1), filling crude oil of V0 in volume into an airtight container of VC in volume; 2), maintaining the airtight container filled with the crude oil in the step 1) at measuring temperature T constantly; 3), feeding carbon dioxide gas into the constant-temperature airtight container in the step 2), and measuring pressure P (t) of the carbon dioxide gas once from starting time t0 every other delta ttime until balanced pressure is realized; 4), utilizing expansion coefficient beta of the crude oil dissolved with carbon dioxide and combining with a relation between diffusion time t and the pressure P (t) to obtain the diffusion coefficient DAB of carbon dioxide in the crude oil, wherein a formula in the step 4) is show as follows. The method takes the circumstance that the crude oil expands in volume after carbon dioxide is diffused into the crude oil into consideration, so that the diffusion coefficient of carbon dioxide in the crude oil can be measured more accurately.

The invention discloses a vehicle system for detecting oxygen, carbon monoxide and carbon dioxide. The system comprises an oxygen sensor, a carbon monoxide sensor, a carbon dioxide sensor, a signal amplification circuit module, a filtering circuit module, a controller module, a warning module and a display module, wherein weak signals detected by the oxygen sensor, the carbon monoxide sensor and the carbon dioxide sensor are input into the controller module after being amplified by the signal amplification circuit module and filtered by the filtering circuit module; and the controller module is synchronously connected with the warning module and the display module. The system can detect the concentrations of oxygen, carbon monoxide and carbon dioxide in a vehicle in real time; and once the concentrations in the vehicle are not in a normal concentration range, an alarm is immediately given to prompt persons in the vehicle so as to effectively prevent the generation of death with asphyxia in the closed vehicle.

An ink composition for sensing carbon dioxide gas contains a pH indicator formed using a combination of two or more types of pH indicator components, binder, and solvent and allows easy visual observation of color changes of an indicating portion caused by the concentration of carbon dioxide gas. When the ink composition is applied to a carbon dioxide indicator and package, a pinhole and poor seal of a carbon-dioxide-ambient package are easily found.

The invention relates to a petroleum extraction technology, in particular to a method for recovering carbon dioxide in produced gas by driving in a petroleum extraction process. The method comprises the following steps of: (1) compressing, cooling and separating: cooling and separating a part of moisture and heavy hydrocarbons out through gas compression; (2) distilling de-oiled water to obtain CO2 gas of which the water content is less than or equal to 200ppm; (3) liquefying and stripping to obtain a finished CO2 liquid which meets an oil driving requirement; (4) and stripping at a low temperature for further recovering CO2 and concentrating methane, ethane and other organic matters. In the method, oilfield CO2 produced gas by driving is recovered by adopting rectifying and low-temperature stripping coupling methods, the flow is simple, and convenience is brought to operation; and as proved by practice, the CO2 yield is over 98 percent, the energy consumption is low, light oil and oilfield fuel gas are by-produced, byproducts have high economic values, and the method has a good application effect.

The invention relates to an in-situ circulating hydrate promoter capable of continuously separating carbon dioxide, an apparatus and a method thereof. The hydrate promoter comprises a heterocyclic compound, quaternary ammonium salt, an organosilicon surfactant and a carbonic ester compound. The apparatus is a twin-tower or multi-tower cycle trapping tower having a same structure; the trapping comprises a gas inlet / distribution and liquid discharge device, a cold / heat exchange device, a screen mesh large space trapping-releasing bed, an atomization spray apparatus, and a liquid-gas separating apparatus which are arranged from lower to upper, and a N2 and CO2-riched discharge pipeline and a warm-pressing induction apparatus are arranged at the top of the trapping tower. The method comprises the following steps: preparing a promoter to an aqueous solution; under conditions of 0.1013-1.0 MPa and the temperature of 0-20 DEG C, trapping CO2; and under conditions of less than 0.1013 MPa and the temperature of 50-100 DEG C, removing CO2. The trapping rate of the CO2 can reach as high as 91.3%, the separated CO2 purity can reach as high as 98.7%; the method is novel and simple, and is adapted to industrial production.

The invention provides a carbon dioxide flux inversion method and system, thereby solving problems that an existing method and system are poor in generalization performance and not suitable for GMI loads. The method comprises the following steps: acquiring GMI data, performing carbon dioxide column concentration inversion to obtain a carbon dioxide average column concentration observation value, and performing height interpolation to obtain a carbon dioxide profile observation value; simulating a regional atmospheric land carbon flux exchange mode based on an RAMS-CMAQ simulation model; and performing calculating by taking the carbon dioxide average column concentration simulation value as an observation operator and taking the sum of carbon dioxide fluxes in an emission list of the RAMS-CMAQ model as a priori value of the carbon dioxide fluxes and adopting an integrated four-dimensional variation assimilation method to obtain a carbon dioxide flux assimilation value and a carbon dioxide column concentration assimilation value. The system uses the method. According to the invention, the carbon dioxide flux is calculated by applying the GMI load.

The invention relates to an adsorbent for removing trace amount of nitric oxide in carbon dioxide and a preparation method thereof, and pertains to the technical field of environment resources and is characterized by providing the adsorbent prepared by taking alumina-HZSM-5 as a carrier and the preparation method, which is used for removing the trace amount of nitric oxide in carbon dioxide; the carrier of the adsorbent loads an activation auxiliary agent Ce salt and one of active components of Co, Ni and Mn, or two metal salts of Mn and Ni or Mn and Co by an equal volume impregnation-high temperature roasting method. The invention have the effects and benefits that the adsorbent has high purification degree and good thermal stability, can be able to remove the nitric oxide in the carbon dioxide to lower than 0.1ppmv under an oxygen free condition and an aerobic condition, and can be reproduced by being heated and scavenged with dry air, nitrogen and carbon dioxide after adsorption saturation; the invention provides a key technology for the preparation of food-grade carbon dioxide and has wide application prospect.

The invention relates to the field of petrochemical production and discloses a preparation method of low carbon olefin. The method comprises the following steps of: (1) heavy oil is contacted with andseparated from supercritical carbon dioxide to obtain a light fluid phase containing light oil and carbon dioxide, and a heavy fluid phase containing heavy oil; (2) the light fluid phase containing the light oil and carbon dioxide undergoes component separation to obtain light oil and carbon dioxide; and (3) the light oil is subjected to steam thermal cracking to obtain low carbon olefin. Throughthe above method, the heavy oil can be fully utilized, the problem of the shortage of the petrochemical raw material can be alleviated, and a cracking device can be operated for a long time. Moreover, in the preparation method of the invention, carbon dioxide is used, which not only avoids the greenhouse effect caused by the emission of carbon dioxide into the atmosphere but also recycles the carbon dioxide to achieve the effect of synergistic emission reduction.

The invention relates to the technical field of carbon dioxide emission reduction and carbon dioxide conversion, in particular to a preparation method of remote explosionproof high-power plasma catalyzed carbon dioxide. The preparation method comprises the following steps of: with carbon dioxide and coal as raw materials, preparing a great deal of combustible carbon monoxide gas at a low price in the industry under the synergic action of high-power plasma, an activating agent and a catalyst; and combusting the carbon monoxide to generate the carbon dioxide which can be gathered and recycled. The preparation method disclosed by the invention has the advantages of remarkably reducing the carbon dioxide conversion temperature, improving the carbon dioxide convertion rate, being energy-saving and environment-friendly, saving fire coal by 10-85 percent, realizing near zero emission of the carbon dioxide, being low in equipment investment and being capable of greatly converting and recycling the carbon dioxide resources and is especially suitable for gathering, recovering and applying the carbon dioxide in a large scale in major coal consuming industries, effectively lightening the energy crisis and reducing the carbon dioxide greenhouse effect.

The invention relates to a sea-air carbon dioxide flux measuring device and a measuring method thereof, belonging to the field of sea-air measurement. The sea-air carbon dioxide flux measuring device comprises a control and data acquisition module, a carbon dioxide partial pressure measuring sensor and a sampling module. Under the control of the control and data acquisition module, the sampling module respectively extracts a water sample and an air sample to the carbon dioxide partial pressure measuring sensor for measurement to obtain sea-air carbon dioxide flux. The invention realizes the device which is provided with the CO2 partial pressure measuring sensor based on acid-base indicators and an optical fiber technology and can synchronously measure the CO2 partial pressure in surface seawater and sea surface atmosphere to further estimate the sea-air CO2 flux. Compared with the prior art, the invention has the advantages that the structure is simple, the stability is high, the power consumption is low and the device is suitable for long-time serial automatic observation on anchored platforms.

It is a device to simultaneously monitor the concentration of the carbon monoxide and carbon dioxide and relates to diode laser spectrum application technique field, which comprises saw tooth wave generator 1, current controller 2, temperature controller 3, diode laser 4, first convex 5, second convex 6, detector 7 and computer, wherein, the output end of I is connected with input end of signal 2; the control output end of 2 is connected with current control end of 4; the output laser is input to the input end of 5 and is output by transmission of 5; the laser through the gas to be measured to the input end of 6; the data signal output end of 7 is connected with data input end of 8.

The invention discloses a device and method for online detecting oxygen and carbon dioxide in a biological fermentation tail gas. The device comprises a water removing device, a gas detecting chamber, a singlechip, a heat radiating fan, a power supply and a PC (Personal Computer) terminal, wherein the gas detecting chamber comprises a gas inlet end and a gas outlet end, the gas inlet end is connected with a gas outlet, the gas detecting chamber is internally provided with an oxygen sensor and a carbon dioxide sensor, the singlechip is connected with the oxygen sensor and the carbon dioxide sensor, the power supply is connected with the oxygen sensor, the carbon dioxide sensor and the heat radiating fan, and the PC terminal is connected with the singlechip. The invention further provides a method for online detecting the oxygen and the carbon dioxide in the biological fermentation tail gas. The device is simple in structure, strong in practicability, low in manufacturing cost, capable of continuously online operating for a long time, and capable of simultaneously completing online detection of contents of oxygen and carbon dioxide; the influence of the water in the tail gas is eliminated, and thus important respiratory metabolism parameters such as CER (Carbon dioxide Evolution Rate), OUR (Oxygen Uptake Rate) and RQ (Respiratory Quotient) in a fermentation process are obtained.

The invention discloses a carbon dioxide laser. The carbon dioxide laser comprises a gas storage tube (5), a water cooling tube (6) and a discharge tube (7), wherein the water cooling tube (6) is sleeved on the outside of the discharge tube (7), the air storage tube (5) is sleeved on the outside of the water cooling tube (6), a positive electrode (1) and a negative electrode (10) are respectively arranged in an anode resonant cavity (2) and a cathode resonant cavity (9) of the discharge tube (7), a water inlet pipe (8) and a water outlet pipe (3) are respectively arranged at two ends of the water cooling tube (6), the anode resonant cavity (2) is communicated with the air storage tube (5) through a gas return tube (4) wound around the outside of the water cooling tube (6), a bump (11) is arranged in the middle of the gas storage tube (5), and the inner diameter of the bump (11) is greater than the inner diameters of two ends of the gas storage tube (5). The carbon dioxide laser has the advantages that bending strength of the product is increased, stability of the product is increased, output power is stable, working gas storage capacity is improved, and service life is improved greatly.

The invention provides a soil respiration measurement method, a soil respiration measurement device and a soil respiration measurement system. The method comprises the steps of measuring respiration data of soil in different layers according to preset time intervals; extracting the respiration data of the soil in different layers measured in a specified time slot; and acquiring carbon dioxide flux in soil respiration of different soil layers within the appointed time slot according to the respiration data. According to the method, the soil respiration of different soil layers can be automatically measured, and a basis can be provided for more accurately assessing influence of human activities on a carbon cycle of an ecological system by measuring the soil respiration of different soil layers.