A method and system for measuring carbon dioxide emissions from coal-fired power plants

Abstract

The present invention discloses a method and system for measuring carbon dioxide emissions from coal-fired power plants, and relates to the technical field of measuring carbon dioxide emissions from coal-fired power plants. In response to a request for measuring carbon dioxide emissions, a corresponding initial emission is determined, and flue gas data of the coal-fired power plant to be measured is collected through a flue gas collection device within a preset measurement time. Based on the oxygen concentration value, load value and preset correction key-value pair library of the flue gas data, a corresponding correction parameter is determined. According to the flue gas data and the correction parameter, a corresponding emission volume concentration value is generated. According to the emission volume concentration value, flue gas data, measurement time and initial emission, the corresponding carbon dioxide emission is determined and used as a new initial emission, and the step of collecting flue gas data of the coal-fired power plant to be measured through a flue gas collection device is jumped and executed. The technical problem that the current coal-fired power plant cannot provide real-time, accurate and reliable data support to power plant managers because the fuel property inspection is limited by test instruments and methods is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide emission measurement in coal-fired power plants, and in particular to a method and system for measuring carbon dioxide emission in coal-fired power plants. Background Art

[0002] For domestic coal-fired power plants that have been put into operation, the overall planning of carbon emission indicators and accurate calculation of carbon emissions have become important tasks for power plant managers. At present, the CO2 emissions calculated by coal-fired power plants during the combustion process through fossil fuel characteristics are easily affected by factors such as the source of coal, coal blending ratio, and fuel combustion level. In addition, since the fuel characteristic test is limited by test instruments and methods, it is difficult to provide real-time, accurate, and reliable data support to power plant managers. Therefore, a method that can accurately measure CO2 emissions is urgently needed. Summary of the invention

[0003] The present invention provides a method and system for measuring carbon dioxide emissions from coal-fired power plants, which solves the technical problem that the current calculation of CO2 emissions from the combustion process of coal-fired power plants through fossil fuel characteristics is easily affected by factors such as the source of coal, coal blending ratio, and fuel combustion level, and that the fuel characteristic inspection is limited by test instruments and methods, making it difficult to provide power plant managers with real-time, accurate, and reliable data support.

[0004] A first aspect of the present invention provides a method for measuring carbon dioxide emissions from a coal-fired power plant, which relates to a coal-fired power plant to be measured, wherein a flue gas collection device is provided in the flue of the coal-fired power plant to be measured, comprising:

[0005] In response to a carbon dioxide emission measurement request, determine an initial emission corresponding to the carbon dioxide emission measurement request, and collect flue gas data of the coal-fired power plant to be measured through the flue gas collection device within a preset measurement time;

[0006] Determine corresponding correction parameters based on the oxygen concentration value, load value and a preset correction key-value pair library of the flue gas data;

[0007] generating a corresponding emission volume concentration value according to the carbon dioxide volume concentration of the flue gas data and the correction parameter;

[0008] Determine the corresponding carbon dioxide emission according to the emission volume concentration value, the flue gas data, the measurement time and the initial emission;

[0009] The carbon dioxide emissions are used as new initial emissions, and the process jumps to executing the step of collecting the flue gas data of the coal-fired power plant to be measured by the flue gas collection device within a preset measurement time.

[0010] Optionally, the step of determining corresponding correction parameters based on the oxygen concentration value, the load value and a preset correction key-value pair library of the flue gas data includes:

[0011] Using the oxygen concentration value and load value of the flue gas data, generating a corresponding composite key;

[0012] According to the composite key, the corresponding correction parameter is matched in a preset correction key-value pair library.

[0013] Optionally, the correction parameter includes a first correction parameter and a second correction parameter, and the step of determining the corresponding emission volume concentration value according to the carbon dioxide volume concentration of the flue gas data and the correction parameter includes:

[0014] Determining whether the carbon dioxide volume concentration of the flue gas data is greater than or equal to the first correction parameter;

[0015] If the carbon dioxide volume concentration is less than the first correction parameter, the first correction parameter is used as the emission volume concentration value;

[0016] If the carbon dioxide volume concentration is greater than or equal to the first correction parameter, determining that the carbon dioxide volume concentration is less than or equal to the second correction parameter;

[0017] If the carbon dioxide volume concentration is greater than the second correction parameter, the second correction parameter is used as the emission volume concentration value;

[0018] If the carbon dioxide volume concentration is less than or equal to the second correction parameter, the carbon dioxide volume concentration is used as the emission volume concentration value.

[0019] Optionally, it also includes:

[0020] When the carbon dioxide volume concentration is less than the first correction parameter, a preset adjustment method is used to adjust the probe position of the flue gas collection device;

[0021] When the carbon dioxide volume concentration is greater than the second correction parameter, the alarm of the smoke collection device is controlled to start.

[0022] Optionally, the step of generating corresponding carbon dioxide emissions according to the emission volume concentration value, the flue gas data, the measurement time and the initial emissions includes:

[0023] Multiplying the emission volume concentration value and a preset first characteristic parameter to generate a first multiplication value;

[0024] The first multiplication value is multiplied by a preset second characteristic parameter to generate a carbon dioxide mass concentration value;

[0025] Generate a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data;

[0026] Multiplying the carbon dioxide emission rate and the measurement time to generate a second multiplied value;

[0027] The initial emission amount and the second multiplication value are added together to generate carbon dioxide emission amount.

[0028] Optionally, the flue gas data includes flue gas flow rate, flue cross-sectional area, atmospheric pressure, flue gas static pressure, flue gas temperature and flue gas humidity, and the step of generating a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data includes:

[0029] Adding the flue gas temperature and a preset third characteristic parameter to generate a first sum value;

[0030] Performing ratio processing on the third characteristic parameter and the first sum value to generate a first ratio;

[0031] Adding the atmospheric pressure and the flue gas static pressure to generate a second sum value;

[0032] Performing ratio processing on the second sum value and a preset fourth characteristic parameter to generate a second ratio;

[0033] Performing difference processing on the preset fifth characteristic parameter and the smoke humidity to generate a first difference;

[0034] The flue gas flow rate, the flue cross-sectional area, the first ratio, the second ratio, the first difference, the carbon dioxide mass concentration, a preset flow coefficient and a sixth characteristic parameter are multiplied to generate a carbon dioxide emission rate.

[0035] A second aspect of the present invention provides a system for measuring carbon dioxide emissions from a coal-fired power plant, which relates to a coal-fired power plant to be measured, wherein a flue gas collection device is provided in the flue of the coal-fired power plant to be measured, and comprises:

[0036] A collection module, configured to respond to a carbon dioxide emission measurement request, determine an initial emission corresponding to the carbon dioxide emission measurement request, and collect flue gas data of the coal-fired power plant to be measured through the flue gas collection device within a preset measurement time;

[0037] A correction module, used for determining corresponding correction parameters based on the oxygen concentration value, load value and a preset correction key-value pair library of the flue gas data;

[0038] A volume concentration analysis module, used to generate a corresponding emission volume concentration value according to the carbon dioxide volume concentration of the flue gas data and the correction parameter;

[0039] A flue gas analysis module, used to determine the corresponding carbon dioxide emission according to the emission volume concentration value, the flue gas data, the measurement time and the initial emission;

[0040] A jump module is used to use the carbon dioxide emissions as new initial emissions and jump to execute the step of collecting the flue gas data of the coal-fired power plant to be measured through the flue gas collection device within a preset measurement time.

[0041] Optionally, the correction module includes:

[0042] A composite key submodule, used to generate a corresponding composite key using the oxygen concentration value and the load value of the flue gas data;

[0043] The matching submodule is used to match the corresponding correction parameter in a preset correction key-value pair library according to the composite key.

[0044] Optionally, the correction parameter includes a first correction parameter and a second correction parameter, and the volume concentration analysis module includes:

[0045] A first analysis submodule, used for determining whether the carbon dioxide volume concentration of the flue gas data is greater than or equal to the first correction parameter;

[0046] If the carbon dioxide volume concentration is less than the first correction parameter, the first correction parameter is used as the emission volume concentration value;

[0047] a second analysis submodule, configured to determine that the carbon dioxide volume concentration is less than or equal to the second correction parameter if the carbon dioxide volume concentration is greater than or equal to the first correction parameter;

[0048] If the carbon dioxide volume concentration is greater than the second correction parameter, the second correction parameter is used as the emission volume concentration value;

[0049] If the carbon dioxide volume concentration is less than or equal to the second correction parameter, the carbon dioxide volume concentration is used as the emission volume concentration value.

[0050] Optionally, the flue gas analysis module comprises:

[0051] A first processing submodule, used for performing multiplication processing on the emission volume concentration value and a preset first characteristic parameter to generate a first multiplication value;

[0052] A second processing submodule, used for performing multiplication processing on the first multiplication value and a preset second characteristic parameter to generate a carbon dioxide mass concentration value;

[0053] A third processing submodule, configured to generate a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data;

[0054] a fourth processing submodule, configured to perform multiplication processing on the carbon dioxide emission rate and the measurement time to generate a second multiplication value;

[0055] The fifth processing submodule is used to add the initial emission amount and the second multiplication value to generate carbon dioxide emission amount.

[0056] It can be seen from the above technical solutions that the present invention has the following advantages:

[0057] In response to a carbon dioxide emission measurement request, the initial emission corresponding to the carbon dioxide emission measurement request is determined, and within a preset measurement time, the flue gas data of the coal-fired power plant to be tested is collected through a flue gas collection device, and the corresponding correction parameters are determined based on the oxygen concentration value, load value and preset correction key-value pair library of the flue gas data, and the corresponding emission volume concentration value is generated according to the carbon dioxide volume concentration and correction parameters of the flue gas data, and the corresponding carbon dioxide emissions are determined according to the emission volume concentration value, flue gas data, measurement time and initial emissions, and the carbon dioxide emissions are used as the new initial emissions, and the execution is jumped to the step of collecting the flue gas data of the coal-fired power plant to be tested through a flue gas collection device within the preset measurement time. The technical problem that the fuel characteristic inspection of coal-fired power plants is currently limited by test instruments and methods, which makes it difficult to provide real-time, accurate and reliable data support to power plant managers is solved. The present application analyzes and corrects the carbon dioxide volume concentration collected by the flue gas collection device by utilizing the relationship between the oxygen concentration value, the load value and the carbon dioxide volume concentration, obtains the corrected emission volume concentration value, and performs calculations based on the flue gas data, the initial emission volume and the measurement time to generate the corresponding carbon dioxide emissions. At the same time, when the carbon dioxide volume concentration is abnormal, the flue gas collection device is adjusted to improve the accuracy of CO2 emission measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0059] Figure 1A flowchart of a method for measuring carbon dioxide emissions from a coal-fired power plant provided in Embodiment 1 of the present invention;

[0060] Figure 2 A flowchart of a method for measuring carbon dioxide emissions from a coal-fired power plant provided in Embodiment 2 of the present invention;

[0061] Figure 3 This is a structural block diagram of a system for measuring carbon dioxide emissions from a coal-fired power plant provided in Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0062] The embodiment of the present invention provides a method and system for measuring carbon dioxide emissions from coal-fired power plants, which are used to solve the technical problem that the CO2 emissions from the combustion process calculated by the current coal-fired power plants through the characteristics of fossil fuels are easily affected by factors such as the source of coal, coal blending ratio, and fuel combustion level, and because the fuel characteristic inspection is limited by test instruments and methods, it is difficult to provide power plant managers with real-time, accurate, and reliable data support.

[0063] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, 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 embodiments described below are only 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.

[0064] See also Figure 1 , Figure 1 A flowchart of the steps of a method for measuring carbon dioxide emissions from a coal-fired power plant provided in Embodiment 1 of the present invention.

[0065] The present invention provides a method for measuring carbon dioxide emissions from a coal-fired power plant, which relates to a coal-fired power plant to be measured. A flue gas collection device is provided in the flue of the coal-fired power plant to be measured, comprising:

[0066] It should be noted that the flue gas collection device includes a flue gas collection and transmission device, a flue gas pretreatment device, an ultrasonic flow measurement system, a greenhouse gas analysis system and a data collection and transmission system. Among them, the flue gas pretreatment device includes a sampling probe, a sample transmission pipeline, a flow control device and a sampling pump, etc., which are used for direct sampling and transmission of flue gas. The flue gas pretreatment device uses a high-precision compressor + a high heat exchange rate condenser system to pre-treat the gas, which can remove most of the water in the sampled gas. The unique design effectively reduces the loss of component concentration and ensures that the gas entering the analyzer is pure and dry. The condenser is made of high-precision silicon wafers, and the cold trap temperature is controlled below 4°C. The cold trap is exquisitely designed and reliable in performance, which can ensure continuous and trouble-free operation under harsh field conditions and ensure that the system does not distort the sampling and analysis during the drainage process. The greenhouse gas analysis system is used to measure and analyze the collected flue gas. Through the preferred filter band and electrically modulated light source, the non-dispersive infrared technology (NDIR) is used to achieve strong anti-interference and high-precision measurement of gas components. The analyzer has high measurement accuracy, strong stability and fast response time. Analyze and test the CO2 component in the flue gas.

[0067] Step 101 : In response to a carbon dioxide emission measurement request, determine an initial emission corresponding to the carbon dioxide emission measurement request, and collect flue gas data of a coal-fired power plant to be measured through a flue gas collection device within a preset measurement time.

[0068] Flue gas data refers to the flue gas composition emitted by the fixed pollution sources of the coal-fired power plant to be tested and the basic parameters of the flue of the coal-fired power plant to be tested, which are collected by the flue gas collection device during the measurement time, including but not limited to flue gas flow rate, flue cross-sectional area, atmospheric pressure, flue gas static pressure, flue gas temperature, carbon dioxide volume concentration, oxygen concentration value, load value and flue gas humidity, etc.

[0069] In the embodiment of the present invention, in response to a carbon dioxide emission measurement request, an initial emission corresponding to the carbon dioxide emission measurement request is acquired, and flue gas data of the coal-fired power plant to be measured is collected by a flue gas collection device within a preset measurement time.

[0070] Step 102: Determine corresponding correction parameters based on the oxygen concentration value and load value of the flue gas data and a preset correction key-value pair library.

[0071] The correction parameter refers to the maximum and minimum values ​​of the carbon dioxide volume concentration under the constraints of the oxygen concentration value and the load value.

[0072] In the embodiment of the present invention, the oxygen concentration value and the load value of the flue gas data are input into a preset correction key-value pair library as a composite key to match the corresponding first correction parameter and the second correction parameter.

[0073] Step 103: Generate a corresponding emission volume concentration value according to the carbon dioxide volume concentration and correction parameters of the flue gas data;

[0074] In an embodiment of the present invention, it is determined whether the carbon dioxide volume concentration of the flue gas data is within the correction interval [first correction parameter, second correction parameter] constructed by the first correction parameter and the second correction parameter. When the carbon dioxide volume concentration is within the correction interval, the carbon dioxide volume concentration is used as the emission volume concentration value. When the carbon dioxide volume concentration is not within the correction interval, it is determined whether the carbon dioxide volume concentration is greater than the first correction parameter. When the carbon dioxide volume concentration is less than the first correction parameter, the sampling probe posture of the flue gas collection device is adjusted according to a preset adjustment method and the first correction parameter is used as the emission volume concentration value. When the carbon dioxide volume concentration is greater than the first correction parameter, the alarm unit of the flue gas collection device is controlled to start notifying the operation and maintenance personnel to perform maintenance and the second correction parameter is used as the emission volume concentration value.

[0075] Step 104, determining the corresponding carbon dioxide emissions according to the emission volume concentration value, flue gas data, measurement time and initial emissions;

[0076] In the embodiment of the present invention, the emission volume concentration value, flue gas data, measurement time and initial emission are input into a preset emission analysis model to obtain the corresponding carbon dioxide emission.

[0077] It should be noted that the emission analysis model is as follows:

[0078] B h =E h *t h +B;

[0079] E h =c d ×Q sn ×10 -6 ;

[0080]

[0081]

[0082]

[0083]

[0084] Among them, c s is the emission volume concentration value, E h is the carbon dioxide emission rate, t h is the measurement time, B is the initial emission, B h is the carbon dioxide emission, c dQ is the CO2 dry basis mass concentration under standard conditions, sn is the dry flue gas volume flow rate under standard conditions, Q s is the volume flow rate of wet flue gas under actual working conditions, t s is the flue gas temperature, p atm is the atmospheric pressure, p s is the flue gas static pressure, X sw is the humidity content of flue gas, A is the cross-sectional area of ​​flue, To determine the average flow rate of wet flue gas in the cross section, K v is the flow coefficient, is the average flue gas velocity.

[0085] Step 105 : Taking the carbon dioxide emissions as new initial emissions, the process jumps to the step of collecting the flue gas data of the coal-fired power plant to be measured by the flue gas collection device within a preset measurement time.

[0086] In the embodiment of the present invention, the carbon dioxide emissions are taken as the new initial emissions at the current moment, and the execution is skipped to the step of collecting the flue gas data of the coal-fired power plant to be measured by the flue gas collection device within a preset measurement time.

[0087] In an embodiment of the present invention, in response to a carbon dioxide emission measurement request, the initial emission corresponding to the carbon dioxide emission measurement request is determined, and within a preset measurement time, the flue gas data of the coal-fired power plant to be tested is collected through a flue gas collection device, and the corresponding correction parameters are determined based on the oxygen concentration value, load value and preset correction key-value pair library of the flue gas data, and the corresponding emission volume concentration value is generated according to the carbon dioxide volume concentration and correction parameters of the flue gas data, and the corresponding carbon dioxide emission is determined according to the emission volume concentration value, flue gas data, measurement time and initial emission, and the carbon dioxide emission is used as the new initial emission, and the step of collecting the flue gas data of the coal-fired power plant to be tested through the flue gas collection device within the preset measurement time is jumped to execute. The technical problem that the fuel characteristic inspection of coal-fired power plants is currently limited by test instruments and methods, which makes it difficult to provide real-time, accurate and reliable data support to power plant managers is solved. The present application analyzes and corrects the carbon dioxide volume concentration collected by the flue gas collection device by utilizing the relationship between the oxygen concentration value, the load value and the carbon dioxide volume concentration, obtains the corrected emission volume concentration value, and performs calculations based on the flue gas data, the initial emission volume and the measurement time to generate the corresponding carbon dioxide emissions. At the same time, when the carbon dioxide volume concentration is abnormal, the flue gas collection device is adjusted to improve the accuracy of CO2 emission measurement.

[0088] See also Figure 2 , Figure 2 A flowchart of the steps of a method for measuring carbon dioxide emissions from a coal-fired power plant provided in Embodiment 2 of the present invention.

[0089] The present invention provides a method for measuring carbon dioxide emissions from a coal-fired power plant, which relates to a coal-fired power plant to be measured. A flue gas collection device is provided in the flue of the coal-fired power plant to be measured, comprising:

[0090] Step 201 : In response to a carbon dioxide emission measurement request, determine an initial emission corresponding to the carbon dioxide emission measurement request, and collect flue gas data of the coal-fired power plant to be measured through a flue gas collection device within a preset measurement time.

[0091] It is worth mentioning that the greenhouse gas analysis system of the flue gas collection device has a temperature compensation function, which is suitable for measurement at different ambient temperatures. The system has high reliability, strong anti-interference ability and low failure rate. The physical interference reduction characteristics are achieved by optimizing the wavelength. The gas pool after passivation treatment improves corrosion resistance and airflow stability, and enhances signal stability. The system has high measurement accuracy, easy operation and simple maintenance.

[0092] It is worth mentioning that the flow measurement system of the flue gas collection device calculates the gas flow rate through ultrasonic transmitters installed on both sides of the pipeline. The specific working principle is that the ultrasonic transmitters are installed on both sides of the pipeline and act as transmitters and receivers alternately. The acceleration and deceleration effect of the gas flow rate on it changes the transmission time of the ultrasonic pulse, shortening the transmission time in the same direction and increasing the transmission time in the reverse direction. The gas flow rate is calculated by the transmission time difference.

[0093] In the embodiment of the present invention, when a carbon dioxide emission measurement request is received, the initial emission corresponding to the carbon dioxide emission measurement request is obtained, and the flue gas collection device is controlled to collect flue gas data of the coal-fired power plant to be measured within a preset measurement time.

[0094] Step 202: Generate a corresponding composite key using the oxygen concentration value and load value of the flue gas data.

[0095] The composite key refers to a key composed of event feature data input into the modified key-value pair library, wherein the event feature data may include oxygen concentration value and load value.

[0096] In the embodiment of the present invention, the oxygen concentration value and the load value of the flue gas data are used as a composite key.

[0097] Step 203: Match the corresponding correction parameter in the preset correction key-value pair library according to the composite key.

[0098] In the embodiment of the present invention, the composite key is input into a preset correction key-value pair library to obtain a corresponding key value, and the correction parameters corresponding to the coal-fired power plant to be tested are matched according to the key value.

[0099] It should be noted that under the condition that the fuel is relatively stable, there is a certain change relationship between the oxygen concentration value and load value of the coal-fired power plant to be tested and the carbon dioxide volume concentration. The oxygen concentration value and load value can be input into the preset correction key-value pair library, and the concentration change range of the carbon dioxide volume concentration at the current moment can be calculated based on the mapping relationship between the composite key and the carbon dioxide volume concentration.

[0100] Step 204: Generate a corresponding emission volume concentration value according to the carbon dioxide volume concentration and correction parameters of the flue gas data;

[0101] Further, the correction parameter includes a first correction parameter and a second correction parameter, and step 204 includes the following sub-steps:

[0102] The first correction parameter refers to the minimum concentration value of the carbon dioxide volume concentration variation range of the coal-fired power plant to be tested at the current moment.

[0103] The second correction parameter refers to the maximum concentration value of the carbon dioxide volume concentration variation range of the coal-fired power plant to be tested at the current moment.

[0104] S11. Determine whether the carbon dioxide volume concentration of the flue gas data is greater than or equal to a first correction parameter.

[0105] In the embodiment of the present invention, it is determined whether the carbon dioxide volume concentration of the flue gas data is greater than or equal to the minimum concentration value.

[0106] S12. If the carbon dioxide volume concentration is less than the first correction parameter, the first correction parameter is used as the emission volume concentration value.

[0107] In the embodiment of the present invention, if the carbon dioxide volume concentration is less than the minimum concentration value, the minimum concentration value is used as the emission volume concentration value.

[0108] S13. If the volume concentration of carbon dioxide is greater than or equal to the first correction parameter, determine that the volume concentration of carbon dioxide is less than or equal to the second correction parameter.

[0109] In the embodiment of the present invention, when the volume concentration of carbon dioxide is greater than or equal to the minimum concentration value, it is determined that the volume concentration of carbon dioxide is less than or equal to the maximum concentration value.

[0110] S14. If the carbon dioxide volume concentration is greater than the second correction parameter, the second correction parameter is used as the emission volume concentration value.

[0111] In the embodiment of the present invention, if the carbon dioxide volume concentration is greater than the maximum concentration value, the maximum concentration value is used as the emission volume concentration value.

[0112] S15. If the carbon dioxide volume concentration is less than or equal to the second correction parameter, the carbon dioxide volume concentration is used as the emission volume concentration value.

[0113] In the embodiment of the present invention, when the carbon dioxide volume concentration is less than or equal to the maximum concentration value, the carbon dioxide volume concentration is used as the emission volume concentration value.

[0114] Furthermore, it also includes S21-S22:

[0115] S21. When the volume concentration of carbon dioxide is less than the first correction parameter, a preset adjustment method is used to adjust the probe position of the flue gas collection device.

[0116] In an embodiment of the present invention, when the volume concentration of carbon dioxide is less than the minimum concentration value, it means that there is a deviation in the data information collected by the collection probe, and the central axis of each probe of the flue gas collection device is adjusted to the center of the flow section and consistent with the streamline direction.

[0117] It is worth mentioning that the flue gas collection device analyzes the volume concentration of carbon dioxide by non-dispersive infrared absorption method.

[0118] S22. When the volume concentration of carbon dioxide is greater than the second correction parameter, the alarm of the smoke collection device is controlled to start.

[0119] In the embodiment of the present invention, when the volume concentration of carbon dioxide is greater than the maximum concentration, it indicates that the refrigerator or peristaltic pump of the flue gas collection device may be abnormal, and the alarm of the flue gas collection device is activated to notify the operation and maintenance personnel to perform maintenance.

[0120] Step 205, determining the corresponding carbon dioxide emissions according to the emission volume concentration value, flue gas data, measurement time and initial emissions;

[0121] Further, step 205 includes the following sub-steps:

[0122] S31, multiplying the emission volume concentration value and a preset first characteristic parameter to generate a first multiplication value.

[0123] S32, multiplying the first product value and the preset second characteristic parameter to generate a carbon dioxide mass concentration value.

[0124] S33. Generate a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data.

[0125] Furthermore, the flue gas data includes flue gas flow rate, flue cross-sectional area, atmospheric pressure, flue gas static pressure, flue gas temperature and flue gas humidity. S33 includes the following sub-steps:

[0126] S331, adding the flue gas temperature and a preset third characteristic parameter to generate a first sum value;

[0127] S332, performing ratio processing on the third characteristic parameter and the first sum value to generate a first ratio;

[0128] S333, adding the atmospheric pressure and the flue gas static pressure to generate a second sum value;

[0129] S334, performing ratio processing on the second sum and a preset fourth characteristic parameter to generate a second ratio;

[0130] S335, performing difference processing on the preset fifth characteristic parameter and the smoke humidity to generate a first difference;

[0131] S336, multiplying the flue gas flow rate, the flue cross-sectional area, the first ratio, the second ratio, the first difference, the carbon dioxide mass concentration, the preset flow coefficient and the sixth characteristic parameter to generate a carbon dioxide emission rate.

[0132] S34, multiplying the carbon dioxide emission rate and the measurement time to generate a second multiplication value;

[0133] S35, adding the initial emission amount and the second multiplication value to generate carbon dioxide emission amount.

[0134] In the embodiment of the present invention, in order to facilitate the implementation of the method, the above process of S31-S35 can be converted into a formula encapsulation form, and the expression of carbon dioxide emissions is:

[0135] B h =E h *t h +B;

[0136] E h =c d ×Q sn ×10 -6 ;

[0137]

[0138]

[0139]

[0140]

[0141] Among them, c s is the emission volume concentration value, E h is the carbon dioxide emission rate, t h is the measurement time, B is the initial emission, B h is the carbon dioxide emission, c d Q is the CO2 dry basis mass concentration under standard conditions, snis the dry flue gas volume flow rate under standard conditions, Q s is the volume flow rate of wet flue gas under actual working conditions, t s is the flue gas temperature, p atm is the atmospheric pressure, p s is the flue gas static pressure, X sw is the humidity content of flue gas, A is the cross-sectional area of ​​flue, To determine the average flow rate of wet flue gas in the cross section, K v is the flow coefficient, is the average flue gas velocity.

[0142] Step 206: Use the carbon dioxide emissions as new initial emissions, and jump to the step of collecting the flue gas data of the coal-fired power plant to be measured through the flue gas collection device within a preset measurement time.

[0143] In an embodiment of the present invention, the carbon dioxide emissions are taken as new initial emissions, and the step of collecting flue gas data of the coal-fired power plant to be tested through a flue gas collection device within a preset measurement time is jumped to execute, thereby realizing real-time measurement of the carbon dioxide emissions of the coal-fired power plant to be tested.

[0144] In an embodiment of the present invention, in response to a carbon dioxide emission measurement request, the initial emission corresponding to the carbon dioxide emission measurement request is determined, and within a preset measurement time, the flue gas data of the coal-fired power plant to be tested is collected through a flue gas collection device, and the corresponding correction parameters are determined based on the oxygen concentration value, load value and preset correction key-value pair library of the flue gas data, and the corresponding emission volume concentration value is generated according to the carbon dioxide volume concentration and correction parameters of the flue gas data, and the corresponding carbon dioxide emission is determined according to the emission volume concentration value, flue gas data, measurement time and initial emission, and the carbon dioxide emission is used as the new initial emission, and the step of collecting the flue gas data of the coal-fired power plant to be tested through the flue gas collection device within the preset measurement time is jumped to execute. The technical problem that the fuel characteristic inspection of coal-fired power plants is currently limited by test instruments and methods, which makes it difficult to provide real-time, accurate and reliable data support to power plant managers is solved. The present application analyzes and corrects the carbon dioxide volume concentration collected by the flue gas collection device by utilizing the relationship between the oxygen concentration value, the load value and the carbon dioxide volume concentration, obtains the corrected emission volume concentration value, and performs calculations based on the flue gas data, the initial emission volume and the measurement time to generate the corresponding carbon dioxide emissions. At the same time, when the carbon dioxide volume concentration is abnormal, the flue gas collection device is adjusted to improve the accuracy of CO2 emission measurement.

[0145] See also Figure 3 , Figure 3 This is a structural block diagram of a system for measuring carbon dioxide emissions from a coal-fired power plant provided in Embodiment 3 of the present invention.

[0146] The present invention provides a system for measuring carbon dioxide emissions from a coal-fired power plant, which relates to a coal-fired power plant to be measured. A flue gas collection device is provided in the flue of the coal-fired power plant to be measured, comprising:

[0147] The collection module 301 is used to respond to the carbon dioxide emission measurement request, determine the initial emission corresponding to the carbon dioxide emission measurement request, and collect the flue gas data of the coal-fired power plant to be measured through the flue gas collection device within a preset measurement time;

[0148] The correction module 302 is used to determine corresponding correction parameters based on the oxygen concentration value and load value of the flue gas data and a preset correction key-value pair library;

[0149] The volume concentration analysis module 303 is used to generate a corresponding emission volume concentration value according to the carbon dioxide volume concentration and correction parameters of the flue gas data;

[0150] The flue gas analysis module 304 is used to determine the corresponding carbon dioxide emissions according to the emission volume concentration value, flue gas data, measurement time and initial emissions;

[0151] The jump module 305 is used to use the carbon dioxide emissions as new initial emissions and jump to execute the step of collecting the flue gas data of the coal-fired power plant to be measured through the flue gas collection device within a preset measurement time.

[0152] Furthermore, the correction module 302 includes:

[0153] The composite key submodule is used to generate a corresponding composite key using the oxygen concentration value and load value of the flue gas data;

[0154] The matching submodule is used to match the corresponding correction parameters in the preset correction key-value pair library according to the composite key.

[0155] Furthermore, the correction parameter includes a first correction parameter and a second correction parameter, and the volume concentration analysis module 303 includes:

[0156] A first analysis submodule, used to determine whether the carbon dioxide volume concentration of the flue gas data is greater than or equal to a first correction parameter;

[0157] If the carbon dioxide volume concentration is less than the first correction parameter, the first correction parameter is used as the emission volume concentration value;

[0158] a second analysis submodule, for determining that the carbon dioxide volume concentration is less than or equal to a second correction parameter if the carbon dioxide volume concentration is greater than or equal to the first correction parameter;

[0159] If the carbon dioxide volume concentration is greater than the second correction parameter, the second correction parameter is used as the emission volume concentration value;

[0160] If the carbon dioxide volume concentration is less than or equal to the second correction parameter, the carbon dioxide volume concentration is used as the emission volume concentration value.

[0161] Furthermore, the flue gas analysis module 304 includes:

[0162] A first processing submodule, used for performing multiplication processing on the emission volume concentration value and a preset first characteristic parameter to generate a first multiplication value;

[0163] A second processing submodule is used to perform multiplication processing on the first product value and a preset second characteristic parameter to generate a carbon dioxide mass concentration value;

[0164] The third processing submodule is used to generate a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data;

[0165] A fourth processing submodule, used for multiplying the carbon dioxide emission rate and the measurement time to generate a second multiplied value;

[0166] The fifth processing submodule is used to add the initial emission amount and the second multiplication value to generate carbon dioxide emission amount.

[0167] Furthermore, the volume concentration analysis module 303 further includes:

[0168] The regulating submodule is used to adjust the probe position of the smoke collection device by a preset regulating method when the carbon dioxide volume concentration is less than the first correction parameter;

[0169] The early warning submodule is used to control the alarm of the flue gas collection device to start when the volume concentration of carbon dioxide is greater than the second correction parameter.

[0170] Furthermore, the flue gas data includes flue gas flow rate, flue cross-sectional area, atmospheric pressure, flue gas static pressure, flue gas temperature and flue gas humidity. The third processing submodule includes:

[0171] A first processing unit, used for performing sum processing on the flue gas temperature and a preset third characteristic parameter to generate a first sum value;

[0172] A second processing unit is used to perform ratio processing on the third characteristic parameter and the first sum value to generate a first ratio;

[0173] A third processing unit is used for adding the atmospheric pressure and the flue gas static pressure to generate a second sum value;

[0174] a fourth processing unit, configured to perform ratio processing on the second sum and a preset fourth characteristic parameter to generate a second ratio;

[0175] a fifth processing unit, configured to perform difference processing on a preset fifth characteristic parameter and smoke humidity to generate a first difference;

[0176] The sixth processing unit is used to multiply the flue gas flow rate, the flue cross-sectional area, the first ratio, the second ratio, the first difference, the carbon dioxide mass concentration, the preset flow coefficient and the sixth characteristic parameter to generate a carbon dioxide emission rate.

[0177] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0178] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0179] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for measuring carbon dioxide emissions from a coal-fired power plant, characterized in that: Involving a coal-fired power plant to be tested, a flue gas collection device is provided in the flue of the coal-fired power plant to be tested, including: In response to a carbon dioxide emission measurement request, determine an initial emission corresponding to the carbon dioxide emission measurement request, and collect flue gas data of the coal-fired power plant to be measured through the flue gas collection device within a preset measurement time; Determine corresponding correction parameters based on the oxygen concentration value, load value and a preset correction key-value pair library of the flue gas data; generating a corresponding emission volume concentration value according to the carbon dioxide volume concentration of the flue gas data and the correction parameter; Generate corresponding carbon dioxide emissions according to the emission volume concentration value, the flue gas data, the measurement time, and the initial emissions; Taking the carbon dioxide emissions as new initial emissions, jumping to the step of collecting the flue gas data of the coal-fired power plant to be measured by the flue gas collection device within a preset measurement time; The step of determining corresponding correction parameters based on the oxygen concentration value, load value and preset correction key-value pair library of the flue gas data comprises: Using the oxygen concentration value and load value of the flue gas data, generating a corresponding composite key; Matching corresponding correction parameters in a preset correction key-value pair library according to the composite key; The step of generating corresponding carbon dioxide emissions according to the emission volume concentration value, the flue gas data, the measurement time and the initial emissions comprises: Multiplying the emission volume concentration value and a preset first characteristic parameter to generate a first multiplication value; The first multiplication value is multiplied by a preset second characteristic parameter to generate a carbon dioxide mass concentration value; Generate a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data; Multiplying the carbon dioxide emission rate and the measurement time to generate a second multiplied value; The initial emission amount and the second multiplication value are added together to generate carbon dioxide emission amount.

2. The method for measuring carbon dioxide emissions from a coal-fired power plant according to claim 1, characterized in that: The correction parameter includes a first correction parameter and a second correction parameter, and the step of determining the corresponding emission volume concentration value according to the carbon dioxide volume concentration of the flue gas data and the correction parameter includes: Determining whether the carbon dioxide volume concentration of the flue gas data is greater than or equal to the first correction parameter; If the carbon dioxide volume concentration is less than the first correction parameter, the first correction parameter is used as the emission volume concentration value; If the carbon dioxide volume concentration is greater than or equal to the first correction parameter, determining that the carbon dioxide volume concentration is less than or equal to the second correction parameter; If the carbon dioxide volume concentration is greater than the second correction parameter, the second correction parameter is used as the emission volume concentration value; If the carbon dioxide volume concentration is less than or equal to the second correction parameter, the carbon dioxide volume concentration is used as the emission volume concentration value.

3. The method for measuring carbon dioxide emissions from a coal-fired power plant according to claim 2, characterized in that: Also includes: When the carbon dioxide volume concentration is less than the first correction parameter, the probe position of the flue gas collection device is adjusted by a preset adjustment method; When the carbon dioxide volume concentration is greater than the second correction parameter, the alarm of the smoke collection device is controlled to start.

4. The method for measuring carbon dioxide emissions from a coal-fired power plant according to claim 1, characterized in that: The flue gas data includes flue gas flow rate, flue cross-sectional area, atmospheric pressure, flue gas static pressure, flue gas temperature and flue gas humidity. The step of generating a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data includes: Adding the flue gas temperature and a preset third characteristic parameter to generate a first sum value; Performing ratio processing on the third characteristic parameter and the first sum value to generate a first ratio; Adding the atmospheric pressure and the flue gas static pressure to generate a second sum value; Performing ratio processing on the second sum value and a preset fourth characteristic parameter to generate a second ratio; Performing difference processing on the preset fifth characteristic parameter and the smoke humidity to generate a first difference; The flue gas flow rate, the flue cross-sectional area, the first ratio, the second ratio, the first difference, the carbon dioxide mass concentration, a preset flow coefficient and a sixth characteristic parameter are multiplied to generate a carbon dioxide emission rate.

5. A system for measuring carbon dioxide emissions from a coal-fired power plant, characterized in that: Involving a coal-fired power plant to be tested, a flue gas collection device is provided in the flue of the coal-fired power plant to be tested, including: A collection module, configured to respond to a carbon dioxide emission measurement request, determine an initial emission corresponding to the carbon dioxide emission measurement request, and collect flue gas data of the coal-fired power plant to be measured through the flue gas collection device within a preset measurement time; A correction module, used for determining corresponding correction parameters based on the oxygen concentration value, load value and a preset correction key-value pair library of the flue gas data; A volume concentration analysis module, used to generate a corresponding emission volume concentration value according to the carbon dioxide volume concentration of the flue gas data and the correction parameter; A flue gas analysis module, used to generate corresponding carbon dioxide emissions according to the emission volume concentration value, the flue gas data, the measurement time and the initial emission; A jump module, used for taking the carbon dioxide emissions as new initial emissions and jumping to execute the step of collecting the flue gas data of the coal-fired power plant to be measured by the flue gas collection device within a preset measurement time; The correction module comprises: A composite key submodule, used to generate a corresponding composite key using the oxygen concentration value and the load value of the flue gas data; A matching submodule, used for matching the corresponding correction parameter in a preset correction key-value pair library according to the composite key; The flue gas analysis module comprises: A first processing submodule, used for performing multiplication processing on the emission volume concentration value and a preset first characteristic parameter to generate a first multiplication value; A second processing submodule, used for performing multiplication processing on the first multiplication value and a preset second characteristic parameter to generate a carbon dioxide mass concentration value; A third processing submodule, configured to generate a corresponding carbon dioxide emission rate according to the carbon dioxide mass concentration value and the flue gas data; a fourth processing submodule, configured to perform multiplication processing on the carbon dioxide emission rate and the measurement time to generate a second multiplication value; The fifth processing submodule is used to add the initial emission amount and the second multiplication value to generate carbon dioxide emission amount.

6. The carbon dioxide emission measurement system of a coal-fired power plant according to claim 5, characterized in that: The correction parameter includes a first correction parameter and a second correction parameter, and the volume concentration analysis module includes: A first analysis submodule, used for determining whether the carbon dioxide volume concentration of the flue gas data is greater than or equal to the first correction parameter; If the carbon dioxide volume concentration is less than the first correction parameter, the first correction parameter is used as the emission volume concentration value; a second analysis submodule, configured to determine that the carbon dioxide volume concentration is less than or equal to the second correction parameter if the carbon dioxide volume concentration is greater than or equal to the first correction parameter; If the carbon dioxide volume concentration is greater than the second correction parameter, the second correction parameter is used as the emission volume concentration value; If the carbon dioxide volume concentration is less than or equal to the second correction parameter, the carbon dioxide volume concentration is used as the emission volume concentration value.

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