183 results about "Carbon dioxide content" patented technology

Disclosed herein are systems and methods for monitoring at least one volatile breathing compound in respiratory gases of patients. A device includes a patient respiratory gas interface coupled via a connector to a gas sampling line. The line includes a first channel for conducting a predetermined flux of respiratory gases from the interface to an inlet of a sidestream gas monitor, which monitors carbon dioxide (CO2) content. A pump facilitates gas flow through the device and the monitor. An outlet of the monitor is coupled to a second channel for conveying gases away. A valve controls passage of respiratory gas from the monitor via the second channel by connecting or disconnecting the flux to / from at least one volatile breathing compound detector, which monitors compound content. A control unit monitors CO2 values and uses this as a signal to control the valve, enabling compound monitoring or bypass based on CO2 content.

The invention relates to the technical field of control, and discloses an oxygen supply dynamic regulation and control method, system and device for a plateau district and computer equipment, and the method comprises the steps: carrying out the first-stage oxygen supply for an indoor room through a first oxygen supply operation corresponding to a first oxygen supply flow under the condition that there is no person in the indoor room; after the indoor real-time oxygen content reaches the target oxygen volume fraction, if people move in the indoor room and the indoor room is in a ventilation state, second-stage oxygen supply is carried out on the indoor room through second oxygen supply operation corresponding to second oxygen supply flow, so that the indoor real-time oxygen content is kept stable at the target oxygen volume fraction; and the second oxygen supply flow is corrected by using the number of indoor people, the indoor activity type and the indoor real-time carbon dioxide content which are monitored in real time, and the difference value between the indoor real-time oxygen content and the target oxygen volume fraction is kept within the target threshold value range. Finally, the oxygen supply regulation and control method for dynamically controlling the indoor oxygen supply flow of the plateau area based on the environment parameter data monitored in real time is achieved.

The invention discloses a natural gas calorific value test result correction method, system, equipment and medium, and relates to the technical field of natural gas analys.The method comprises the steps that according to the initial calorific value, the carbon dioxide content and the relative density obtained through testing and pressure data and temperature data of a test point, the first nitrogen content is obtained through calculation based on an S-GERG88 state equation; calculating a first calorific value by using the first nitrogen content and the initial calorific value, and performing iterative calculation according to the first calorific value to obtain a second nitrogen content until the absolute value of the difference between the second nitrogen content and the first nitrogen content is smaller than a preset value; determining the first calorific value corresponding to the obtained second nitrogen content as a target calorific value; through an iterative algorithm, the accuracy of a natural gas calorific value test result and a natural gas working condition compression factor calculation result through the laser absorption spectrometry can be greatly improved, and then the path reliability and applicability of natural gas energy metering through the laser absorption spectrometry are improved.

The invention relates to the field of environmental engineering, and discloses a carbon dioxide geological sequestration leakage early warning device which comprises a box body, multiple sets of connecting columns are installed at the bottom of the box body, the length of the connecting columns is not smaller than 5 m, iron buckets are welded to the outer surfaces of the connecting columns, and communicating holes are formed in the outer surfaces of the connecting columns; the top end of the connecting column is fixedly connected with a sealing cylinder located in an inner cavity of the box body, and a piston is arranged in the sealing cylinder in a sealed and sleeved mode. According to the device, radial displacement (referring to the radial direction of a deep hole) generated by crustal movement in the inner wall of the deep hole in an early warning region is utilized to radially extrude an iron bucket, so that the iron bucket deforms, the volume of an inner cavity of the iron bucket is reduced, transmission oil is forced to upwards push a piston and a connecting plate to apply pressure to a pressure sensor, and crustal stress is sensed through the pressure sensor; compared with real-time monitoring of the carbon dioxide content, the carbon dioxide leakage early-warning method has an obvious early-warning effect.

The utility model relates to the field of sewage treatment, in particular to a composite three-phase separator module for preventing sludge calcification and an anaerobic reactor thereof, which comprise an outer separation module, an inner separation module, a water outlet module and a backflow module, according to the composite three-phase separator module provided by the utility model, a remarkable technical breakthrough is realized through structural innovation and process optimization. The traditional IC reactor is limited by the arrangement mode of a three-phase separator, and the effective sludge level height is less than 50% of the total height of the reactor, so that the upper volume is idle. The composite three-phase separator module is integrated at the top of the reactor, and the height of a sludge layer is increased to 70%-80% of the total height of the reactor through the double-layer separation design of the outer separation module and the inner separation module, so that the microbial biomass and the treatment load are greatly improved. Meanwhile, methane is released through forced collision of a V-shaped separation plate of the outer separation module, so that the content of carbon dioxide in reflux liquid is reduced by more than 80%, and calcium carbonate crystallization conditions are effectively destroyed by combining forced mixing of inlet water with a circulating pump.

The utility model discloses a polyethylene foaming material carbon dioxide leakage detection device which comprises a detection device and a gas tank, a gas inlet pipe is arranged on one side of the gas tank, a gas collection hopper is arranged on the upper end portion of the gas inlet pipe, a support is arranged in the gas collection hopper, a motor drives fan blades to rotate, and carbon dioxide leaked in the polyethylene foaming process is discharged out of the gas tank. Due to the connection effect among the air outlet pipe, the spiral blade and the air tank, the mixed air generates downward spiral accelerated movement under the guidance of the spiral blade, and water vapor is separated from the mixed air under the gravity and centrifugal effect; mixed air which falls to the inner bottom of the air tank at the outlet of the lower end of the spiral blade to be collected, is separated from water vapor and dried enters the air outlet pipe from the bottom end of the air outlet pipe and is conveyed into the detection device, so that the water vapor content in the air is prevented from influencing the detection result of the carbon dioxide content in the air, and the accuracy of the detection result is improved.

1. The name of the design product: farmland environment multi-modal high-throughput intelligent sensing equipment. 2. The use of the design product: as a sensing detection device, detecting temperature, humidity, atmospheric pressure, wind speed, wind direction, total solar radiation, illumination, rainfall, carbon dioxide content, and particulate matter concentration in the farmland environment. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention discloses oil and gas well carbon dioxide online monitoring and metering equipment and an implementation method thereof, and relates to the technical field of oil field metering. The equipment comprises a gas-liquid separation unit, a liquid production capacity and moisture content analysis and detection unit, a carbon dioxide content detection unit, a gas flow unit, an automatic control unit, a data acquisition and transmission unit and an auxiliary unit, on-line metering and remote data transmission of parameters including liquid production capacity, gas production capacity, water content, carbon dioxide content, pressure and temperature of a wellhead of an oil well can be realized. The gas-liquid separation unit adopts a gravity separation method and is combined with a specific structural design to guarantee the separation effect; each parameter detection unit realizes accurate detection based on an ultrasonic technology, an infrared absorption principle, a thermal measurement principle and the like; data are uploaded to an upper computer through a DTU unvarnished transmission technology, and real-time monitoring and data analysis are supported. The system is adaptive to conventional drive and CCUS drive oil fields, the automation degree is high, the environmental adaptability is high, and data support is provided for accurate management of oil reservoirs.

The object of the present invention is to provide a biogas treatment facility and a biogas treatment method that enable the removal of carbon dioxide contained in biogas generated by methane fermentation in a simple and low-cost manner. [Solution] To solve the above problems, we provide a biogas treatment facility and a biogas treatment method that include a gas-liquid contact section for bringing biogas discharged from a methane fermentation facility into contact with an aqueous solution containing alkaline earth metal ions, wherein a carbonate precipitation reaction proceeds in the gas-liquid contact section. [Effect] According to this invention, for biogas generated by methane fermentation and having a relatively high carbon dioxide content, carbon dioxide can be removed (recovered and fixed) from the biogas by a carbonate precipitation reaction that proceeds without the supply of external energy. This makes it possible to remove carbon dioxide contained in biogas simply and at low cost.

A method of isolating a vehicle occupant's breath is presented that includes energizing an ultraviolet radiation source to disinfect the air. A first sensor detects the carbon dioxide content in the air. A second sensor detects the quality of the air. A third sensor detects particles in the air. The results of the first sensor are compared to a baseline carbon dioxide reading recorded in a controller connected to the sensor. Fan speed increases the duration of air exposure to the ultraviolet radiation. The results of the second sensor are compared to a baseline air quality recorded in the controller. A display including a filtration system is signaled to identify contaminants in the air. The results of the third sensor are compared to a baseline particle recorded in the controller. A warning is sent to a party of interest indicating the presence of particles in the air.

The invention relates to a preparation process for producing water for injection based on a hollow fiber deoxidation membrane, and belongs to the technical field of preparation of water for injection medicines. According to the preparation process of the water for injection, dissolved oxygen in a water body can be stably removed, reproduction of microorganisms, bacteria and the like in the water can be effectively restrained by strictly controlling the content of oxygen and carbon dioxide in the water, meanwhile, due to removal of carbon dioxide in the water body, the conductivity of the water body is further reduced, the pH value of the finished water is stabilized to be 6.5-7.5, and the water quality is improved. The related industrial standards of the water for injection are met, and the content of microorganisms and endotoxin meets the strict requirements of the 2025 edition pharmacopoeia. Compared with a traditional distillation method, the membrane method integration process does not need to consume a large amount of industrial steam, energy consumption can be remarkably reduced, and the operation cost is reduced; by optimizing the position of the hollow fiber deoxidation membrane device, the water quality and the storage stability of the water for injection can be improved, and the production cost and the maintenance cost can be reduced.

This invention relates to the field of mining environmental protection equipment technology, and more particularly to a separable mining carbon neutralization device. The separable mining carbon neutralization device provided by this invention solves the technical problem of poor operational stability in existing mining carbon neutralization devices. The separable mining carbon neutralization device includes a pre-stage component for separating carbon dioxide from gas, a post-stage component for adsorbing the carbon dioxide separated by the pre-stage component, and a gas pump. By setting a separation membrane to separate carbon dioxide from the gas, the gas entering the post-stage component has a higher carbon dioxide content and lower impurity content, which facilitates rapid adsorption of carbon dioxide by the adsorbent, thereby improving the stability of the mining carbon neutralization device during operation and increasing the gas treatment efficiency.

The waste gas treatment method and system based on the metal seawater battery involve electrochemical energy technology and environmental protection technology. The waste gas treatment method of the present invention includes the following steps: (1) introducing the waste gas generated by the near-shore waste gas emission device into the reaction zone of the metal seawater battery; (2) the hydroxide ions generated by the positive electrode of the metal seawater battery react with the carbon dioxide in the waste gas to neutralize the hydroxide ions, and the resulting carbonate ions combine with metal ions to form carbonates to reduce the carbon dioxide content in the waste gas. At the same time, the metal seawater battery outputs electrical energy. The tail gas CO2 capture efficiency of the present invention is high, reaching more than 80%, and at the same time, CO2 resource utilization is realized.

The invention discloses a chamber interior air conditioning system which comprises a chamber, a first air inlet mechanism, a first air inlet pipeline, a carbon dioxide removing mechanism, a second air inlet pipeline, an exhaust pipeline, a first communicating valve and a second communicating valve. The carbon dioxide removal mechanism comprises a first carbon dioxide adsorption and desorption tower and a second carbon dioxide adsorption and desorption tower which are used for alternately adsorbing and desorbing carbon dioxide, and the chamber is communicated with a gas outlet pipeline and a gas return pipeline; the first communicating valve is used for selectively communicating the second gas inlet pipeline and the gas outlet pipeline with the first carbon dioxide adsorption and desorption tower and the second carbon dioxide adsorption and desorption tower in pairs; and the second communicating valve is used for selectively communicating the gas exhaust pipeline and the gas return pipeline with the first carbon dioxide adsorption and desorption tower and the second carbon dioxide adsorption and desorption tower in pairs. The air conditioning system in the chamber not only can meet the requirement for maintaining the qualified carbon dioxide content in the chamber, but also can meet the requirement for maintaining the qualified pressure in the chamber.

The invention relates to the technical field of biogas purification, and particularly discloses a system and a method for preparing LNG (Liquefied Natural Gas) by biogas purification, the system comprises a desulfurization unit, a compression unit, a dehydration unit, a rectification unit and a liquefaction unit which are connected in sequence; the desulfurization unit removes hydrogen sulfide; the compression unit pressurizes the biogas; the dehydration unit is composed of three dehydration towers, and the three dehydration towers circularly and continuously dry the biogas; the pre-cooling heat exchanger is used for cooling the dehydrated biogas, the rectification unit comprises primary rectification and secondary rectification, and an LPG extraction agent is introduced into the primary rectification tower; the two-stage rectifying tower is used for removing carbon dioxide in the biogas, and the LPG extracting agent is recycled in the rectifying tower; the liquefying unit comprises a liquefier, the methane with carbon dioxide removed is made into LNG through pressurization of the liquefier, and by means of the scheme, the hydrogen sulfide content in the methane can be reduced to 1 ppm or below, the water content can be reduced to 1 ppm or below, and the carbon dioxide content can be reduced to 50 ppm or below.

Disclosed herein are systems and methods for monitoring at least one volatile breathing compound in respiratory gases of patients. A device includes a patient respiratory gas interface coupled via a connector to a gas sampling line. The line includes a first channel for conducting a predetermined flux of respiratory gases from the interface to an inlet of a sidestream gas monitor, which monitors carbon dioxide (CO₂) content. A pump facilitates gas flow through the device and the monitor. An outlet of the monitor is coupled to a second channel for conveying gases away. A valve controls passage of respiratory gas from the monitor via the second channel by connecting or disconnecting the flux to / from at least one volatile breathing compound detector, which monitors compound content. A control unit monitors CO₂ values and uses this as a signal to control the valve, enabling compound monitoring or bypass based on CO₂ content.

This beer-flavored beverage has an alcohol content of 9.0 (v / v)% or more, a real extract concentration of 12.5 (w / w)% or more, and a linalool content of 7.0 ppb by mass or more, an iso-α acid content of 3.0 ppm by mass or more or a carbon dioxide gas content of 4,500 mg / L or less.

The invention relates to the technical field of carbon dioxide concentration monitoring, and discloses a carbon dioxide concentration monitoring device for a blast furnace gas diffusion port, which comprises a combustor. When blast furnace gas enters the burner, one part of the blast furnace gas enters the guide assembly, and the part of the blast furnace gas enters the detection assembly through the guide assembly to detect the content of carbon dioxide in the blast furnace gas; the blast furnace gas entering the detection assemblies through the guide assemblies can be discharged from the top ends of the guide assemblies again, so that the detection assemblies can detect the carbon dioxide content of the diffused blast furnace gas in real time, and due to the fact that the detection assemblies and the guide assemblies are arranged, different positions of the blast furnace gas can be conveniently detected; therefore, the real-time carbon dioxide content can be obtained by taking the average value of the detection results, so that deviation of the detection results can be avoided, and the accuracy of carbon dioxide concentration detection is improved.

A method for controlling carbon dioxide [CO2] removal in a device (5) for extracorporeal blood gas exchange is disclosed. The device (5) comprises an oxygenator (21) including a membrane (23) acting as a gas-liquid barrier enabling CO2 transfer between a bloodstream and a sweep gas flow through the oxygenator. The method comprises the steps of adding (S1) CO2 to the sweep gas flow upstream of the oxygenator (21) to control a degree of CO2 removal from the bloodstream by the oxygenator, determining (S2) a measure of CO2 removal by the oxygenator (21) based on a difference [ΔCCO2blood] between a measure of a pre-oxygenator content of CO2 [CCO2in] in the bloodstream upstream of the oxygenator (21) and an estimate of a post-oxygenator content of CO2 [CCO2out] in the bloodstream downstream of the oxygenator (21), and utilizing (S3) the measure of CO2 removal for improved regulation of the CO2 addition to the sweep gas flow.

This utility model belongs to the field of nasal oxygen cannula technology, and in particular, is a high-flow nasal oxygen cannula with carbon dioxide. It includes a wing-shaped rotary connector and a carbon dioxide monitoring line. One end of the wing-shaped rotary connector is connected to a catheter connector, one end of the catheter connector is connected to a tube sleeve, one end of the tube sleeve is connected to a tube, one end of the tube is connected to a rotary connector, and one end of the rotary connector is connected to a nasal oxygen cannula support. A nasal oxygen cannula is snapped into one side of the nasal oxygen cannula support, and a Y-shaped cap is snapped into one end of the nasal oxygen cannula support. A Y-shaped valve is provided on one side of the Y-shaped cap. In use, the nasal oxygen cannula support, Y-shaped cap, Y-shaped valve, silicone valve pressure ring, Y-shaped connector, rotary lock, tube elbow, PVC pipe, Luer connector, and carbon dioxide monitoring line allow for easy connection to a carbon dioxide monitoring device to monitor the carbon dioxide content exhaled by the patient, thereby improving the monitoring effect.

This application relates to a method for fermenting and processing Liushenqu by adjusting the carbon dioxide content in the fermentation environment, as well as Liushenqu processed by this fermentation and processing method. The present invention makes fine control over the fermentation process of Liushenqu, and the main feature lies in controlling the carbon dioxide content in the environment during the fermentation process. By means of introducing preheated air, the carbon dioxide content in the fermentation environment is controlled. The activity of protease in the obtained Liushenqu is significantly improved. At the same time, it can more effectively promote the growth of intestinal probiotics.

Provided is a dielectric composition containing carbon dioxide and a halogenated olefin having 2 carbon atoms, the carbon dioxide content with respect to the total amount of the halogenated olefin having 2 carbon atoms and the carbon dioxide being 76.4 mass% or more, or a dielectric composition containing nitrogen and the halogenated olefin having 2 carbon atoms, the nitrogen content with respect to the total amount of the halogenated olefin having 2 carbon atoms and the nitrogen being 77.6 mass% or more, wherein the amount of oxygen with respect to the total amount of the dielectric composition is less than 1.0 vol%. Also provided are an electrical device and a supply method in which the dielectric composition is used, and a use of the dielectric composition.

The invention provides a carbon dioxide-based elastic spandex fiber and a preparation method thereof, the carbon dioxide content in the carbon dioxide-based elastic spandex fiber is 10-15%, and the preparation method comprises the following preparation steps: carrying out prepolymerization reaction on polyisocyanate and carbon dioxide-based polyether carbonate polyol in a solvent, a carbon dioxide-based polyurethane prepolymer solution with the mass concentration of 30%-40% is obtained; reacting the carbon dioxide-based polyurethane prepolymer solution with a mixed amine solution to obtain a polyurethane-urea solution; the polyurethane-urea solution is cured to obtain a polyurethane-urea cured solution, and the polyurethane-urea cured solution is subjected to a dry spinning technology to prepare the carbon dioxide-based elastic spandex fiber. The product performance of the carbon dioxide-based spandex elastic fiber is close to that of petroleum-based spandex, the petroleum-based spandex elastic fiber can perfectly replace petroleum-based spandex products, and transformation and upgrading of the products can be better promoted.

The application discloses a system and method for extracting helium from lean-helium natural gas and producing multiple products. The system comprises a primary refrigeration device, a primary low-temperature separator, a pre-denitrogenation tower, a demethanizer, a secondary refrigeration device, a helium extraction tower and a denitrogenation tower. The system and method of the application separate nitrogen, methane, ethane and propane in order from low to high according to the boiling points of the components, separate nitrogen and methane by using the pre-denitrogenation tower, concentrate the helium concentration in the overhead gas by about 30 times, and control the carbon dioxide content in the overhead gas to be lower than 50 ppm; and separate nitrogen and helium by using low-temperature rectification. The system and method realize the economic and effective recovery of helium content of 200-3000 ppm in natural gas, and the recovery rates of ethane and helium can both reach more than 99 mol%. Meanwhile, LNG, liquefied petroleum gas and light hydrocarbons are produced as by-products, and the low-temperature nitrogen gas produced as a by-product can provide cold energy at a temperature of about -184 DEG C, thereby greatly improving the economic benefits.

The disclosed technologies provide a multi-stage system and process for converting lignocellulosic feedstock into high-quality methane-rich biogas. The technologies include an initial anaerobic secretome bioreactor (ASB1) operating under low-moisture, mesophilic conditions, which maximizes enzymatic hydrolysis, acetogenesis, and partial acidogenesis of the feedstock while producing biogas. ASB1 produces a semi-solid effluent rich in partially degraded organic compounds, residual lignin, and microbial biomass. A subsequent thermophilic anaerobic secretome bioreactor (ASB2) accepts this effluent as a substrate and facilitates further enzymatic breakdown and pasteurization through thermophilic microbial activity, producing an effluent optimized for methanogenesis. The final methanogenic digestion stage processes ASB2's effluent, converting it into methane with minimal carbon dioxide content, thus enhancing biogas quality and yield. This multi-stage process efficiently breaks down complex organic materials while minimizing inhibitory byproducts, enabling high-efficiency biogas production suitable for energy applications.

Title of the invention: Method and apparatus for membrane separation of a mixture containing predominantly hydrogen and carbon dioxide. An apparatus for membrane separation of a mixture containing predominantly hydrogen and carbon dioxide and in addition at least one component chosen from the list carbon monoxide, methane or nitrogen comprises a first membrane (M1), a conduit for sending the mixture to separate in the first membrane allowing obtaining a first permeate (P1) enriched in hydrogen and carbon dioxide relative to the mixture and a first residue (R1) depleted in hydrogen and carbon dioxide relative to the mixture, a first blower (C1), a conduit for sending the first permeate to the first blower to be compressed, a second membrane (M2),a pipe to send the first residue into the second membrane, yielding a second permeate (P2) enriched in hydrogen and carbon dioxide compared to the first residue, and a second residue (R2) depleted in hydrogen and carbon dioxide compared to the first residue; a second blower (C2); a pipe to send the second permeate to the second blower; and at least one expansion turbine (T1, T2) connected to expand the second residue and drive the first and / or second blower. Single figure,

The application discloses a kind of water-gas alternating drive injection-production ratio calculation method, device, electronic equipment and medium.The method includes according to underground crude oil dissolved gas oil ratio calculation formula and carbon dioxide content calculation formula, simulates the change rule of crude oil dissolved gas oil ratio and the change rule of carbon dioxide content under different proportions;Simulate the change of crude oil high pressure property in the process of output gas recycling injection, obtain the change rule of saturation pressure and the change rule of crude oil volume coefficient;According to the change rule of crude oil dissolved gas oil ratio, the change rule of carbon dioxide content, the change rule of saturation pressure and the change rule of crude oil volume coefficient, construct crude oil high pressure property chart in the process of output gas recycling injection;Based on crude oil high pressure property chart, construct injection-production ratio calculation formula in the process of output gas recycling injection with carbon dioxide.This technical scheme, establish based on output gas recycling injection water-gas alternating drive injection-production ratio calculation model, provide technical means for the development effect evaluation, development adjustment, production control etc.of oil field.

The utility model discloses carbon dioxide mineralization maintenance divides the steam switching device, including first maintenance kettle, second maintenance kettle, divides steam switching subassembly, power component and breather, first maintenance kettle and second maintenance kettle are linked together through breather, with power component drive divides steam switching subassembly operation, make carbon dioxide in the breather selective flow into first maintenance kettle or second maintenance kettle. The rotation of the connecting arm makes the rotating shaft follow the rotation, which in turn drives the rotation of the tee pipe, allowing the air hole direction on the surface of the tee pipe to face the breather pipe through which carbon dioxide is introduced, the inner wall of the shell and the maintenance kettle through which carbon dioxide is required. At this time, according to the required carbon dioxide content in each maintenance kettle, rotate the tee pipe, and connect the air hole with the breather pipe of the maintenance kettle with the required carbon dioxide content. It is not necessary to add carbon dioxide gas to the maintenance kettle one by one. The overall structure is simple, convenient to use, and improves the carbon dioxide mineralization maintenance efficiency.

The utility model discloses a carbon dioxide determination distillation system for a gas-containing orange juice beverage. The carbon dioxide determination distillation system comprises a distillation unit, a cooling absorption unit and a reaction tank, the distillation unit is communicated with the cooling absorption unit through a first guide pipe, the cooling absorption unit is communicated with the reaction tank through a second guide pipe, a sample injection pipe, a third conveying pipe and a fourth conveying pipe are mounted on the distillation unit, and metering pumps and liquid inlet control valves are mounted on the sample injection pipe, the third conveying pipe and the fourth conveying pipe; an exhaust device is mounted at the upper part of the reaction tank. The orange juice beverage solution is distilled after being subjected to alkali and acid treatment, and overflowing carbon dioxide is condensed by the cooling absorption unit and is subjected to double absorption by the reaction tank, so that the content of carbon dioxide in the gas-containing orange juice beverage can be conveniently measured.

The invention discloses a carbon dioxide emission monitoring device and an online monitoring method thereof, and relates to the field of environment monitoring equipment. Smoke exhausted by the smoke exhaust chimney is sucked through the smoke suction assembly, the sucked smoke is stably conveyed so that the smoke can be sequentially conveyed to pass through the smoke dewatering and drying assembly and the carbon dioxide detection assembly, the smoke dewatering and drying assembly can dehydrate and dry the conveyed smoke so as to remove moisture in the smoke, and the carbon dioxide detection assembly can detect the carbon dioxide in the smoke. Then the carbon dioxide content in the dehydrated and dried flue gas is detected by the carbon dioxide detection assembly, the influence of water vapor and airflow on carbon dioxide concentration detection can be eliminated through stable conveying, dehydration and drying of the flue gas, and the carbon dioxide emission monitoring precision can be improved; the device is further provided with the sampling mechanism, the dehydrated and dried flue gas can be regularly sampled and detected through a sampling bottle in the sampling mechanism, and through cooperation of sampling detection and continuous monitoring of the monitoring mechanism, the carbon dioxide emission monitoring precision can be further improved.