A method and system for online monitoring of greenhouse gases emitted by a flare system

Abstract

The present invention discloses an online monitoring method and system for greenhouse gases emitted by a flare system, wherein a flow rate and temperature and pressure monitoring device monitors the flow rate of flare gas in a flare pipeline; a gas extraction device extracts part of the flare gas from the flare pipeline as combustion gas according to a gas extraction coefficient β; the combustion gas is sent to a combustion device for full combustion in a periodic manner to obtain a gas to be tested; an analysis and testing device monitors the greenhouse gas content S in the gas to be tested; and the actual greenhouse gas emission S0 of the flare system is calculated, where S0=S / β. The online monitoring method and system for greenhouse gases emitted by a flare system of the present invention extracts flare gas in equal proportion, and the flare gas is fully burned in a combustion device to convert it into greenhouse gases such as carbon dioxide that can be measured, and then the content of greenhouse gases such as carbon dioxide in the flue gas emitted by the combustion is measured, and based on the proportional relationship between the flare gas flow rate and the flare gas combustion amount, the emission of greenhouse gases such as carbon dioxide emitted by the flare system is finally converted.

Description

Technical Field

[0001] The invention belongs to the field of flue gas monitoring, and relates to an online monitoring method and system for greenhouse gases emitted by a flare system. Background Art

[0002] At present, the mainstream method of carbon emission accounting uses the principle of conservation of mass for calculation. In the process of mass conservation accounting, some data sources use the default value method (emission factor method) and element measurement method.

[0003] In the early stages of carbon emissions accounting, using the principle of conservation of mass to calculate carbon emissions has strong practical significance and operability.

[0004] On the one hand, the element measurement method adopted by enterprises is generally easy to implement and has clear corresponding standards.

[0005] On the other hand, the element measurement method stipulates a clear and detailed measurement procedure to achieve the corresponding measurement accuracy. If some companies cannot provide the measured values ​​as required or it is not convenient to implement the element measurement work, the current carbon emission accounting method provides a series of unified default values ​​to meet the carbon emission accounting work.

[0006] However, the carbon emissions calculated by the mass conservation principle are largely based on statistical principles, which is limited by differences in corporate data statistics, test conditions, test capabilities, fuel variety, etc. There is a large difference between the carbon emissions calculated by each company and the actual carbon dioxide emissions of the company. Therefore, it is of great significance to use real-time online monitoring of greenhouse gas emissions such as carbon dioxide to calculate carbon emissions.

[0007] In the prior art, the mainstream method for real-time online monitoring of greenhouse gases such as carbon dioxide emitted from fixed pollution sources is to add a carbon dioxide and other greenhouse gas monitoring module to the CEMS system, or to install a carbon dioxide and other greenhouse gas monitoring system separately.

[0008] In the process of implementing the present invention, the inventors found that the prior art has at least one of the following technical problems:

[0009] Existing technologies are only applicable to situations where there is a certain distance between the point where greenhouse gases such as carbon dioxide are generated and the point where they are emitted, that is, the equipment is installed where greenhouse gases such as carbon dioxide have been generated and are being emitted into the atmosphere. A certain amount of samples are extracted through the probe sampling system, and after being pre-processed by the pre-processing system, the samples enter the analysis system to measure greenhouse gases such as carbon dioxide, and then the carbon dioxide emissions are calculated by the data processing system.

[0010] However, for flare systems in the petroleum, chemical and other industries, the combustion point and emission point are located at the same location. At the same time, the flare system is more designed to deal with abnormal conditions such as accidents. Abnormal conditions often have the characteristics of suddenness, uncertainty of flare gas sources, and huge combustion emissions. Therefore, existing real-time online monitoring technology cannot achieve real-time online monitoring of greenhouse gases such as carbon dioxide in the flare system. Summary of the invention

[0011] In view of this, one of the objects of the present invention is to provide a real-time online monitoring method applicable to a flare system.

[0012] A second object of the present invention is to provide a real-time online detection system suitable for a flare system.

[0013] The inventor has continuously innovated and reformed through long-term exploration and attempts, as well as multiple experiments and efforts. To solve the above technical problems, the technical solution provided by the present invention is to provide an online monitoring method for greenhouse gas emissions from a flare system, comprising the following steps:

[0014] S1. Monitor the flow rate of flare gas in the flare pipeline;

[0015] S2, extracting part of the flare gas from the flare pipeline as combustion gas according to the extraction coefficient β;

[0016] S3, periodically sending the combustion gas into a combustion device for full combustion to obtain a gas to be tested;

[0017] S4, monitoring the greenhouse gas content S in the gas to be tested;

[0018] S5. Calculate the actual greenhouse gas emissions S0 of the flare system, S0 = S / β.

[0019] According to a practical embodiment of the method for online monitoring of greenhouse gas emissions from a flare system of the present invention, the extraction coefficient β is:

[0020]

[0021] in:

[0022] Q is the maximum combustion gas volume of the burner of the combustion device;

[0023] A is the minimum value of pipeline gas delivery volume in the flare pipeline within a cycle;

[0024] B is the maximum value of pipeline gas transmission volume in the flare pipeline within one cycle.

[0025] The present invention also provides an online monitoring system for greenhouse gases emitted by a flare system, comprising:

[0026] Flow, temperature and pressure monitoring device: installed in the flare pipeline to monitor the flare gas flow, temperature and pressure in the flare pipeline;

[0027] Gas extraction device: It is installed behind the flow, temperature and pressure monitoring device in the flare pipeline and is used to extract the combustion gas in equal proportion;

[0028] Combustion device: including a burner, in which the combustion gas is fully burned under the condition of oxygen combustion, and a flame retardant is installed on the pipeline connected to the burner;

[0029] Cooling device: Cool the gas after full combustion to meet the test of the analytical test device;

[0030] Analysis and testing device: to analyze and test the greenhouse gas content of the cooled gas and obtain analysis and testing data;

[0031] The air extraction device, the combustion device, the cooling device and the analysis and testing device are connected through a pipeline system.

[0032] According to one embodiment of the on-line monitoring system for greenhouse gas emissions from a flare system of the present invention, it further includes a data processing device for processing the flow, temperature, air pressure, and analytical test data to output the greenhouse gas emissions during the monitoring period.

[0033] According to one embodiment of the online monitoring system for greenhouse gas emissions from a flare system of the present invention, the combustion device comprises:

[0034] At least one mixing chamber: used for temporarily storing the flare gas and mixed oxygen extracted from the flare pipeline, the mixing chamber being connected to the gas extraction device through a pipeline;

[0035] Oxygenator: used to introduce oxygen into the mixing chamber so that the oxygen content in the mixing chamber is consistent with the oxygen content in atmospheric conditions; the oxygenator is connected to the mixing chamber through a pipeline;

[0036] Burner: The mixed gas in the mixing chamber is passed into the burner for combustion; the burner is connected to the mixing chamber through a pipeline; the burner is connected to the analysis and testing device through a pipeline.

[0037] According to an embodiment of the online monitoring system for greenhouse gases emitted by a flare system of the present invention, at least one fan is installed on the pipeline system.

[0038] According to one embodiment of the online monitoring system for greenhouse gases emitted by a flare system of the present invention, the amount of the flare gas material in the mixing chamber is not greater than the maximum safe amount of the burner.

[0039] According to one embodiment of the online monitoring system for greenhouse gases emitted by a flare system of the present invention, there are multiple mixing chambers, which are connected in parallel between the air inlet and outlet device and the burner through pipelines.

[0040] According to one embodiment of the online monitoring system for greenhouse gases emitted by a flare system of the present invention, the mixing chamber and the burner are arranged in a closed circulation pipeline formed by pipelines.

[0041] According to one embodiment of the online monitoring system for greenhouse gas emissions from a flare system of the present invention, a valve is installed on the pipeline connected to the exhaust device, the burner, the mixing chamber, and the oxygenator, and the valve is a remote control valve.

[0042] Compared with the prior art, one of the above technical solutions has the following advantages:

[0043] a) The method and system for online monitoring of greenhouse gases emitted by a flare system of the present invention extracts flare gas in equal proportions, which is fully burned in a combustion device to convert it into greenhouse gases such as carbon dioxide that can be measured, and then measures the content of greenhouse gases such as carbon dioxide in the flue gas emitted by the combustion. Based on the proportional relationship between the flare gas flow rate and the flare gas combustion amount, the emission of greenhouse gases such as carbon dioxide emitted by the flare system is finally converted.

[0044] b) The system of the present invention can realize the continuous extraction and cyclic combustion of flare gas, ensure the continuous conversion of flare gas, and enable better simulation calculation.

[0045] c) The method and system of the present invention can realize online real-time monitoring of greenhouse gas emissions from flare gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 It is a schematic diagram of the pipeline structure of a preferred embodiment of the online monitoring system for greenhouse gas emissions from a flare system of the present invention.

[0048] The marks in the figure are:

[0049] 100 Extraction device,

[0050] 101 Air extraction valve,

[0051] 210 First mixing chamber,

[0052] 211 First intake valve,

[0053] 212 first outlet valve,

[0054] 213 First air return valve,

[0055] 220 Second mixing chamber,

[0056] 221 Second intake valve,

[0057] 222 Second outlet valve,

[0058] 223 Second air return valve,

[0059] 300 oxygenator,

[0060] 301 oxygen supply valve,

[0061] 400 burners,

[0062] 410 First Flame Retardant,

[0063] 420 Second flame retardant,

[0064] 411 Pressure relief valve,

[0065] 501 First Air Pump,

[0066] 502 Second Air Pump,

[0067] 600 Analytical test equipment,

[0068] 601 Analysis pipe valve,

[0069] 700 stop valve;

[0070] 800 Cooling unit. DETAILED DESCRIPTION

[0071] The following is a description with reference to the accompanying drawings and a specific embodiment.

[0072] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0073] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in the subsequent drawings.

[0074] Example 1

[0075] This embodiment describes an online monitoring method for greenhouse gases emitted by a flare system. In this embodiment, the greenhouse gas monitored is CO2. In this method, the online monitoring of greenhouse gases emitted by a flare system is performed according to the following steps:

[0076] S1. Monitor the flow rate of flare gas in the flare pipeline.

[0077] The flow rate, temperature and pressure of the flare gas in the flare gas pipeline, i.e. the chimney, are monitored. The measuring equipment uses flow meters and temperature and pressure gauges with data transmission functions in the existing technology, providing basic conditions for subsequent data processing.

[0078] S2. Extracting part of the flare gas from the flare pipeline as combustion gas according to the extraction coefficient β.

[0079] According to step S1 and the maximum safe combustion gas volume of the combustion device, set the extraction coefficient β:

[0080]

[0081] in:

[0082] Q is the maximum combustion gas volume of the burner of the combustion device;

[0083] A is the minimum value of pipeline gas delivery volume in the flare pipeline within a cycle;

[0084] B is the maximum value of pipeline gas transmission volume in the flare pipeline within one cycle.

[0085] S3. Periodically send the combustion gas into a combustion device for full combustion to obtain a gas to be tested.

[0086] When the carbon chain of the flare gas tail gas is long, if it is to be fully burned, a combustion circulation system needs to be set up, and oxygen needs to be injected during the process to ensure its full combustion.

[0087] S4. Monitoring the greenhouse gas content S in the gas to be tested.

[0088] The gas to be tested is the gas after the combustion gas described in S3 is fully burned, and the monitoring equipment is a carbon dioxide analyzer, especially a carbon dioxide analyzer with a data output function, which is an existing equipment.

[0089] S5. Calculate the actual greenhouse gas emissions S0 of the flare system, S0 = S / β.

[0090] The extraction of flare gas is carried out in cycles, for example, 1 minute or 10 minutes as a cycle. Of course, it can also be set to other time cycles. The cycle setting is determined by comprehensive conditions such as the flare gas emission volume and the gas device processing volume.

[0091] Assume that the flare gas volume in a certain period is Q0, the maximum combustion gas volume of the combustion system combustion device is Q (closed combustion may cause explosion, Q is the maximum safe volume), the minimum value of pipeline gas transmission volume is A, and the maximum value is B. In order to achieve equal-proportional extraction, determine the extraction coefficient β.

[0092] Q=Q 氧气 +Q 燃烧气

[0093]

[0094] The amount of oxygen should be estimated based on the ambient air oxygen content of 21%. The amount of air pumped in each subsequent cycle is β×Q0. The monitoring data of the carbon dioxide analyzer is S.

[0095] Therefore, the value of carbon dioxide S0 when the gas volume in this time period is Q0 is:

[0096] β×Q0:Q0=S:S0;

[0097] S0=S / β.

[0098] Example 2

[0099] This embodiment describes an online monitoring system for greenhouse gas emissions from a flare system, which is used to implement the online monitoring method for greenhouse gas emissions from a flare system described in Example 1.

[0100] See also Figure 1 The online monitoring system for greenhouse gas emissions from the flare system includes: flow, temperature and pressure monitoring devices (not shown in the attached drawings), a gas extraction device 100, a combustion device, a cooling device 800, and an analysis and testing device 600. The combustion device includes a burner 400, a mixing chamber, and an oxygenator 300. Valves are installed on the pipelines connected to the gas extraction device 100, the burner 400, the mixing chamber, and the oxygenator 300. The valves are remote control valves, such as solenoid valves.

[0101] Flow, temperature and pressure monitoring device: installed in the flare pipeline to monitor the flare gas flow, temperature and pressure in the flare pipeline. The measuring equipment uses flow meters and temperature and pressure gauges with data transmission functions in the existing technology to provide basic conditions for subsequent data processing.

[0102] The exhaust device 100 is arranged behind the flow, temperature and pressure monitoring device in the flare pipeline, and is used to extract a preset proportion of combustion gas, that is, to extract gas according to the exhaust coefficient β, and continuously provide combustion gas to the combustion device. The rear is based on the flow direction of the flare gas, that is, the flow, temperature and pressure monitoring device is located in front of the flare gas flow channel, and the exhaust device 100 is located behind the flare gas flow channel. The exhaust device 100 extracts the flare gas for combustion in equal proportions according to the monitoring data of the flow, temperature and pressure monitoring device. In some embodiments, the flow of the flare gas from the flow, temperature and pressure monitoring point to the exhaust point is a exhaust cycle. It should be noted that the exhaust device 100 continuously exhausts gas, and the so-called exhaust cycle is based on the gas storage cycle of the mixing chamber or the combustion cycle of the combustion device. The exhaust device 100 is connected to an air inlet pipe and an air outlet pipe. An exhaust valve 101 is installed on the air inlet pipe of the exhaust device 100. The exhaust valve 101 is in a normally open state. When the online detection system is working, the exhaust valve 101 is in an open state; after closing the exhaust valve 101, the online detection system has no combustion gas to process, and the system stops working.

[0103] Combustion device: includes a burner 400. In this embodiment, the burner 400 is a constant volume combustion bomb. The combustion gas is fully burned in the burner 400 under the condition of oxygen combustion. A flame retardant is installed on the pipeline connected to the burner 400 to ensure the safety of the entire pipeline system. The exhaust device 100, the combustion device, the cooling device and the analysis and testing device 600 are connected through a pipeline system.

[0104] Specifically, the pipeline connection structure of the combustion device in this embodiment is as follows.

[0105] It includes at least one mixing chamber: used to temporarily store the flare gas extracted from the flare pipeline, i.e., combustion gas, or mixed oxygen. Mixed oxygen is to mix the combustion gas with oxygen, and the gas that has undergone preliminary combustion but not yet fully burned with oxygen. The oxygen content after each mixing is the same as the oxygen content in the air. The number of mixing chambers can be 1, 2, 3, 4, and the number can be specifically set according to actual needs.

[0106] In this embodiment, there are two mixing chambers, namely a first mixing chamber 210 and a second mixing chamber 220 , and the first mixing chamber 210 and the second mixing chamber 220 are arranged in parallel.

[0107] The first mixing chamber 210 is connected to the air extraction device 100 through a first pipe, and a first air inlet valve 211 is installed on the first pipe. The first mixing chamber 210 is connected to the burner 400 through a second pipe and a third pipe to form a closed circulation pipeline, and a first air outlet valve 212 and a flame retardant are installed on the second pipe; and a flame retardant and a first air return valve 213 are installed on the third pipe.

[0108] The second mixing chamber 220 is connected to the air extraction device 100 through a fourth pipe, and a second air inlet valve 221 is installed on the fourth pipe. The second mixing chamber 220 is connected to the burner 400 through a fifth pipe and a sixth pipe to form a closed circulation pipeline, and a second air outlet valve 222 and a flame retardant are installed on the fifth pipe; and a flame retardant and a second air return valve 223 are installed on the sixth pipe.

[0109] In a further preferred embodiment, the first mixing chamber 210, the first air inlet valve 211, the first air outlet valve 212, the first air return valve 213, the second pipeline, and the third pipeline serve as the first parallel unit; the second mixing chamber 220, the second air inlet valve 221, the second air outlet valve 222, the second air return valve 223, the fifth pipeline, and the sixth pipeline serve as the second parallel unit; the first parallel unit and the second parallel unit are arranged in parallel. The first parallel unit and the second parallel unit are connected to the burner 400 through the seventh pipeline and the eighth pipeline to form a closed circulation loop. The stop valve 700, the second fan 502, and the second flame retardant 420 are installed on the seventh pipeline. The second fan 502 provides airflow power for the circulation pipeline. The first flame retardant 410 is installed on the eighth pipeline, and a pressure relief pipe is also connected, and a pressure relief valve 411 is installed on the pressure relief pipe.

[0110] The seventh pipeline between the first parallel unit and the stop valve 700 is connected with an oxygen supply pipe, and the oxygen supply pipe is connected to the oxygenator 300 .

[0111] The oxygenator 300 is used to introduce oxygen into the first mixing chamber 210 and the second mixing chamber 220 so that the oxygen content in the mixing chamber is consistent with the oxygen content ratio under atmospheric conditions. The oxygenator 300 can be a high-pressure oxygen cylinder or an oxygen concentrator. An oxygenation valve 301 is installed on the oxygenation pipe. The oxygenator 300 is also connected to a first fan 501 to provide airflow power for the oxygenator.

[0112] The mixed gas in the mixing chamber is passed into the burner 400 for combustion; the burner 400 is a closed combustion device, such as a constant volume combustion bomb. The amount of combustion gas stored in the mixing chamber is not greater than the maximum safe amount of the burner 400.

[0113] The burner 400 is connected to the analysis and testing device 600 through a pipeline. In this embodiment, the seventh pipeline section between the stop valve 700 and the second fan 502 is connected to the analysis tube, the analysis tube is connected to the analysis and testing device 600, and an analysis tube valve 601 is installed on the outlet pipe. A cooling device 800 is also provided on the analysis tube pipeline. The cooling device 800 can be a cooler or a cooling pipe directly constructed by the analysis tube, and the hot gas in the analysis tube is cooled to meet the analysis and testing of the analysis and testing device 600. The analysis and testing device 600 analyzes and tests the cooled gas to obtain analysis and testing data. The analysis and testing device 600 uses the non-dispersive infrared measurement principle to measure the concentration of greenhouse gases such as carbon dioxide, and has the advantages of high measurement accuracy, long service life, and small cross interference. The analysis and testing device 600 is a greenhouse gas analyzer based on infrared detection technology, a greenhouse gas analyzer based on laser detection technology, etc., as well as all greenhouse gas analyzers in the prior art that are suitable for the technical concept of the present invention.

[0114] In a further embodiment, the online detection system further includes a data processing device (not shown in the drawings): processing the flow, temperature, air pressure and analysis test data, and outputting the greenhouse gas emissions during the monitoring period.

[0115] The first air inlet valve 211, the first air outlet valve 212, the first air return valve 213, the second air inlet valve 221, the second air outlet valve 222, the second air return valve 223, the oxygen supply valve 301, the pressure relief valve 411, and the analysis tube valve 601 are all in a normally closed state and are opened only when gas needs to pass through.

[0116] The first mixing chamber 210 and the second mixing chamber 220 are used alternately. The exhaust device 100 first inputs combustion gas into the first mixing chamber 210 until the combustion gas in the first mixing chamber 210 reaches the maximum safe amount of the burner 400. The oxygenator 300 inputs oxygen into the first mixing chamber 210 and mixes it with the combustion gas to obtain a first mixed gas, and the first mixed gas to oxygen ratio reaches 21%; the mixer in the first mixing chamber 210 inputs the burner 400 for combustion. At this time, the exhaust device 100 inputs combustion gas into the second mixing chamber 220. After the first mixture in the first mixing chamber 210 has been burned for the first time, if it has been fully burned, it can be used for analysis and testing by the analysis and testing device 600. However, in most cases, the first mixture cannot be completely burned through one combustion, and needs to be cyclically burned.

[0117] The initial combustion product flows back to the first mixing chamber 210, and is mixed with oxygen for the second time to obtain a second mixed gas, which then enters the burner 400 for combustion. This cycle is repeated until the combustion gas is completely burned. When the oxygen ratio in the Nth mixed gas remains unchanged before and after combustion, it indicates that the combustion gas has been fully burned.

[0118] From the start of combustion to the end of combustion, it is a combustion cycle; from the start of storage of combustion gas to the supplement of oxygen in a mixing chamber, it is a gas storage cycle. The duration of a combustion cycle is no longer than a gas storage cycle, ensuring that the gas extraction device 100 always extracts flare gas from the flare pipeline to achieve continuous gas extraction, continuous combustion, and continuous monitoring. The analysis and test data are processed by the data processing device, and the emissions are summarized by day, month, quarter, and year.

[0119] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A method for online monitoring of greenhouse gases emitted by a flare system, characterized in that: The steps include: S1. Monitor the flow rate of flare gas in the flare pipeline; S2, extracting part of the flare gas from the flare pipeline as combustion gas according to the extraction coefficient β; S3, periodically sending the combustion gas into a combustion device for full combustion to obtain a gas to be tested; S4, monitoring the greenhouse gas content S in the gas to be tested; S5. Calculate the actual greenhouse gas emissions S0 of the flare system, S0 = S / β; The pumping coefficient β is: in: Q is the maximum combustion gas volume of the burner of the combustion device; A is the minimum value of pipeline gas delivery volume in the flare pipeline within one cycle; B is the maximum value of pipeline gas transmission volume in the flare pipeline within one cycle.

2. An online monitoring system using the online monitoring method for greenhouse gas emissions from a flare system according to claim 1, characterized in that: include: Flow, temperature and pressure monitoring device: installed in the flare pipeline to monitor the flare gas flow, temperature and pressure in the flare pipeline; Gas extraction device: It is installed behind the flow, temperature and pressure monitoring device in the flare pipeline and is used to extract the combustion gas in equal proportion; Combustion device: including a burner, in which the combustion gas is fully burned under the condition of oxygen combustion, and a flame retardant is installed on the pipeline connected to the burner; Cooling device: Cool the gas after full combustion to meet the test of the analytical test device; Analysis and testing device: to analyze and test the greenhouse gas content of the cooled gas and obtain analysis and testing data; The air extraction device, the combustion device, the cooling device and the analysis and testing device are connected through a pipeline system.

3. The online monitoring system according to claim 2, characterized in that: It also includes a data processing device: it processes the flow rate, temperature, air pressure, and analysis test data, and outputs the greenhouse gas emissions during the monitoring period.

4. The online monitoring system according to claim 2, characterized in that: The combustion device comprises: At least one mixing chamber: used for temporarily storing the flare gas and mixed oxygen extracted from the flare pipeline, the mixing chamber being connected to the gas extraction device through a pipeline; Oxygenator: used to introduce oxygen into the mixing chamber so that the oxygen content in the mixing chamber is consistent with the oxygen content in atmospheric conditions; the oxygenator is connected to the mixing chamber through a pipeline; Burner: The mixed gas in the mixing chamber is passed into the burner for combustion; the burner is connected to the mixing chamber through a pipeline; the burner is connected to the analysis and testing device through a pipeline.

5. The online monitoring system according to claim 2, characterized in that: At least one fan is installed on the pipeline system.

6. The online monitoring system according to claim 4, characterized in that: The amount of the flare gas material in the mixing chamber is not greater than the maximum safe amount of the burner.

7. The online monitoring system according to claim 4, characterized in that: There are multiple mixing chambers, which are connected in parallel between the air inlet and outlet device and the burner through pipelines.

8. The online monitoring system according to claim 4 or 7, characterized in that: The mixing chamber and the burner are arranged in a closed circulation pipeline formed by pipelines.

9. The online monitoring system according to claim 4, characterized in that: A valve is installed on the pipeline connected with the air extraction device, the burner, the mixing chamber and the oxygenator, and the valve is a remote control valve.

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