Method and device for measuring fossil source carbon emissions for coal-fired combustion of organic solid waste

Abstract

The present application proposes a method and device for measuring fossil-source carbon emissions from the combustion of coal mixed with organic solid waste, wherein the method includes: obtaining the flow rate and CO2 concentration of the flue gas emitted by the carbon emission source during the emission period, and determining the total amount of CO2 emissions during the emission period based on the CO2 concentration and flow rate; then, measuring the first activity of carbon-14 in the organic solid waste mixed with the combustion during the emission period, and the second activity of carbon-14 in the flue gas; then, determining the ratio between the first activity and the second activity, and determining the fossil-source carbon emissions of the carbon emission source based on the product of the ratio and the total amount of CO2 emissions. Thus, the fossil-source carbon emissions of the carbon emission source are determined based on the difference in carbon-14 activity in the organic solid waste and the coal combustion. This improves the accuracy of the measurement of fossil-source carbon emissions from the combustion of coal mixed with organic solid waste.

Description

Technical Field

[0001] The present application relates to the field of electric power carbon emission measurement, and in particular to a method and device for measuring fossil source carbon emissions from coal-fired combustion of organic solid waste. Background Art

[0002] Achieving carbon peak and carbon neutrality is a common goal for my country and the world. Because the CO2 produced by biomass combustion is not included in the total carbon emissions, using coal-fired units or other boilers and cement kilns to burn biomass organic solid waste is an effective means of emission reduction and a carbon reduction route strongly encouraged by the country. However, the traditional method of independently weighing biomass has regulatory difficulties, and as the composition of organic solid waste becomes more complex (which may contain fossil carbon and biogenic carbon), the accuracy of this method is low.

[0003] Therefore, there is an urgent need for a highly accurate method for measuring fossil carbon emissions from coal-fired combustion of organic solid waste. Summary of the Invention

[0004] This application proposes a method and device for measuring fossil-source carbon emissions from coal-fired combustion of organic solid waste. The specific solution is as follows:

[0005] In one aspect, an embodiment of the present application provides a method for measuring fossil-source carbon emissions from the combustion of coal mixed with organic solid waste, comprising:

[0006] Obtain the flow rate and CO2 concentration of flue gas emitted by the carbon emission source during the emission period, so as to determine the total amount of CO2 emissions during the emission period based on the CO2 concentration and flow rate;

[0007] Measure the first activity of carbon-14 in organic solid waste co-combusted during the emission period, and the second activity of carbon-14 in flue gas;

[0008] A ratio between the first activity and the second activity is determined to determine the fossil carbon emissions of the carbon emission source based on the product of the ratio and the total CO2 emissions.

[0009] In a possible implementation of an embodiment of one aspect of the present application, before determining the ratio between the first activity and the second activity and determining the fossil carbon emissions of the carbon emission source based on the product of the ratio and the total CO2 emissions, the method further includes:

[0010] Measure the total amount of air supplied to the combustion during the emission period and determine the third activity of carbon-14 in the air supplied to the combustion;

[0011] The total amount of flue gas in the emission period is determined based on the flow rate, so as to correct the second activity based on the total air volume, the third activity and the total amount of flue gas.

[0012] In a possible implementation of an embodiment of one aspect of the present application, the organic solid waste contains multiple types of fuels, and measuring the first activity of carbon-14 in the organic solid waste co-combusted during the emission period includes:

[0013] Measure the fourth activity of carbon 14 in each type of fuel and the weight of each type of fuel;

[0014] The first activity is determined as the ratio of the sum of the products of the weight of each type of fuel and the fourth activity to the sum of the weight of each type of fuel.

[0015] In a possible implementation of an embodiment of one aspect of the present application, measuring a first activity of carbon-14 in organic solid waste co-combusted during an emission period and a second activity of carbon-14 in flue gas includes:

[0016] The organic solid waste is calcined at high temperature to convert the released CO2 into benzene, which is then measured using liquid scintillation counting to determine the first activity of carbon-14 in the organic solid waste.

[0017] The CO2 in the flue gas is converted into graphite, which is then measured using accelerated mass spectrometry to determine the second activity of carbon-14 in the flue gas.

[0018] Another embodiment of the present application provides a fossil source carbon emission metering device for coal-fired combustion of organic solid waste, comprising:

[0019] An acquisition module is used to obtain the flow rate and CO2 concentration of the flue gas emitted by the carbon emission source during the emission period, so as to determine the total amount of CO2 emissions during the emission period based on the CO2 concentration and flow rate;

[0020] A measurement module for measuring the first activity of carbon-14 in the organic solid waste co-combusted during the emission period and the second activity of carbon-14 in the flue gas;

[0021] The determination module is configured to determine a ratio between the first activity and the second activity, so as to determine the fossil carbon emission of the carbon emission source based on a product of the ratio and the total CO2 emission.

[0022] In a possible implementation of an embodiment of one aspect of the present application, a correction module is further included, which is configured to:

[0023] Measure the total amount of air supplied to the combustion during the emission period and determine the third activity of carbon-14 in the air supplied to the combustion;

[0024] The total amount of flue gas in the emission period is determined based on the flow rate, so as to correct the second activity based on the total air volume, the third activity and the total amount of flue gas.

[0025] In one possible implementation of an embodiment of one aspect of the present application, the organic solid waste includes multiple types of fuels, and the measurement module is used to:

[0026] Measure the fourth activity of carbon 14 in each type of fuel and the weight of each type of fuel;

[0027] The first activity is determined as the ratio of the sum of the products of the weight of each type of fuel and the fourth activity to the sum of the weight of each type of fuel.

[0028] In a possible implementation of an embodiment of one aspect of the present application, the measurement module is configured to:

[0029] The organic solid waste is calcined at high temperature to convert the released CO2 into benzene, which is then measured using liquid scintillation counting to determine the first activity of carbon-14 in the organic solid waste.

[0030] The CO2 in the flue gas is converted into graphite, which is then measured using accelerated mass spectrometry to determine the second activity of carbon-14 in the flue gas.

[0031] Another aspect of the present application provides a computer device including a processor and a memory;

[0032] The processor reads the executable program code stored in the memory to run the program corresponding to the executable program code, so as to implement the method of the above embodiment.

[0033] Another embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, wherein the program implements the method of the above embodiment when executed by a processor.

[0034] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0036] Figure 1 A schematic flow chart of a method for measuring fossil-source carbon emissions from coal-fired combustion of organic solid waste provided in an embodiment of the present application;

[0037] Figure 2 A flow chart of another method for measuring fossil-source carbon emissions from coal-fired combustion of organic solid waste provided in an embodiment of the present application;

[0038] Figure 3 This is a schematic structural diagram of a fossil source carbon emission metering device for coal-fired combustion of organic solid waste provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0040] The following describes a method for measuring fossil-source carbon emissions from the combustion of coal mixed with organic solid waste according to an embodiment of the present application with reference to the accompanying drawings.

[0041] Figure 1 A flow chart of a method for measuring fossil-source carbon emissions from coal-fired combustion of organic solid waste provided in an embodiment of the present application.

[0042] Carbon 14 is a radioactive isotope of carbon 12, which accounts for only 1.2×10 -12 Fossil carbon, due to long-term burial underground, has lost almost all of its carbon-14 content after a lengthy period of decay. However, the carbon-14 concentration of biogenic carbon in biomass is close to that found in the natural atmosphere. Therefore, carbon-14 can be used to distinguish between fossil and biogenic carbon. According to international practice, the standard value of 95% of the carbon-14 oxalate / total carbon content in NBS harvested in 1950 is defined as 100 activity.

[0043] The method for measuring fossil-source carbon emissions from coal-fired combustion of organic solid waste in an embodiment of the present application is performed by a fossil-source carbon emission measuring device for coal-fired combustion of organic solid waste (hereinafter referred to as the measuring device) provided in an embodiment of the present application to improve the accuracy of measuring fossil-source carbon emissions from coal-fired combustion of organic solid waste.

[0044] like Figure 1 As shown, the fossil source carbon emission measurement method for coal-fired mixed combustion of organic solid waste includes:

[0045] Step 101: Obtain the flow rate and CO2 concentration of flue gas emitted by the carbon emission source during the emission period, so as to determine the total amount of CO2 emitted during the emission period based on the CO2 concentration and flow rate.

[0046] In this application, the carbon emission source burns coal mixed with organic solid waste in a fixed emission cycle. When the flue gas is emitted during the combustion, the flow rate of the flue gas and the instantaneous CO2 concentration during the emission cycle are measured to determine the total CO2 emissions and the total amount of flue gas during the emission cycle based on the CO2 concentration and flow rate.

[0047] For example, the process of determining the total amount of CO2 emissions during the emission period based on CO2 concentration and flow rate can be referred to the following formula:

[0048]

[0049] Among them, qy is the flue gas flow rate, is the CO2 concentration, is the total CO2 emissions.

[0050] Step 102: measuring a first activity of carbon-14 in the organic solid waste co-combusted during the emission period and a second activity of carbon-14 in the flue gas.

[0051] In this application, there are various types of organic solid waste, such as agricultural biomass, garden biomass, sludge, textile waste, plastics, etc. In the case of a single type of organic solid waste, the organic solid waste can be directly sampled, crushed and reduced, and then tested for carbon-14 activity under laboratory conditions to determine the primary activity of carbon-14 in the organic solid waste.

[0052] Optionally, in the case where the organic solid waste contains multiple types of fuels, measuring the first activity of carbon-14 in the organic solid waste co-combusted during the emission period includes: sampling each type of fuel separately, crushing and reducing them, and then testing the carbon-14 activity of each type of fuel under laboratory conditions to obtain the fourth activity of carbon-14 in each type of fuel, and measuring the weight of each type of fuel. Thereafter, the ratio of the sum of the product of the weight of each type of fuel and the fourth activity to the sum of the weight of each type of fuel is determined as the first activity.

[0053] For example, the process of determining the first activity is as follows:

[0054]

[0055] Among them, M i is the weight of type i fuel, A i is the fourth activity of carbon-14 in type i fuel, A g It is the first activity of carbon-14 in organic solid waste.

[0056] Alternatively, different detection methods can be used to test the C14 activity of organic solid waste and flue gas to reduce the cost of obtaining and testing C14. A C14 detection method for organic solid waste can include: calcining the organic solid waste at high temperature to convert the released CO2 into benzene, and measuring the benzene using liquid scintillation counting to determine the first C14 activity in the organic solid waste. If the organic solid waste contains multiple types of fuel, the above method can be used to determine the fourth C14 activity of each type of fuel separately.

[0057] The carbon-14 detection method for flue gas can be: converting CO2 in the flue gas into graphite, and measuring the graphite using accelerated mass spectrometry to determine the second activity of carbon-14 in the flue gas.

[0058] Step 103: Determine a ratio between the first activity and the second activity, and determine the fossil carbon emissions of the carbon emission source based on the product of the ratio and the total CO2 emissions.

[0059] In this application, the process of determining the fossil carbon emissions of carbon emission sources can be referred to the following formula:

[0060]

[0061] in, is the carbon emission from fossil sources, A y is the second activity, A g is the first activity, is the total CO2 emissions.

[0062] It is understandable that the activity of C14 in organic solid waste is not zero, while the activity of C14 in fossil sources is zero. The above formula can accurately determine the fossil-source carbon emissions from the combustion of coal mixed with organic solid waste.

[0063] In this application, the flow rate and CO2 concentration of the flue gas emitted by the carbon emission source during the emission period are obtained to determine the total CO2 emissions during the emission period based on the CO2 concentration and flow rate. Subsequently, the first activity of carbon-14 in the organic solid waste co-combusted during the emission period and the second activity of carbon-14 in the flue gas are measured. Then, the ratio between the first activity and the second activity is determined to determine the fossil carbon emissions of the carbon emission source based on the product of the ratio and the total CO2 emissions. Thus, the fossil carbon emissions of the carbon emission source are determined based on the difference in carbon-14 activity in the organic solid waste and the coal. This improves the accuracy of the measurement of fossil carbon emissions from the combustion of organic solid waste with coal.

[0064] Figure 2 A flow chart of another method for measuring fossil-source carbon emissions from the combustion of coal mixed with organic solid waste provided in an embodiment of the present application.

[0065] like Figure 2 As shown, the fossil source carbon emission measurement method for coal-fired mixed combustion of organic solid waste includes:

[0066] Step 201: Obtain the flow rate and CO2 concentration of the flue gas emitted by the carbon emission source during the emission period, so as to determine the total amount of CO2 emissions during the emission period based on the CO2 concentration and flow rate.

[0067] Step 202: measuring a first activity of carbon-14 in the organic solid waste co-combusted during the emission period and a second activity of carbon-14 in the flue gas.

[0068] In this application, the specific implementation process of step 201-step 202 can be found in the detailed description of any embodiment of this application and will not be repeated here.

[0069] Step 203: Measure the total amount of air supplied for combustion during the emission period, and determine the third activity of carbon-14 in the air supplied for combustion.

[0070] In this application, the total amount of air supplied by the combustion air during the emission cycle can be measured at the inlet of the combustion air supply fan. Air sampling is also performed at the inlet of the combustion air supply fan, and the sampled air sample is sent to a laboratory for carbon-14 activity testing to determine the third carbon-14 activity in the air.

[0071] Step 204 : determining the total amount of flue gas in the emission period based on the flow rate, and correcting the second activity based on the total air volume, the third activity, and the total amount of flue gas.

[0072] The process of determining the total amount of flue gas within the emission period based on the flow rate can be referred to the following formula:

[0073] Q y =∫q y dt

[0074] Among them, q y is the flue gas flow rate, Q y is the total amount of flue gas.

[0075] The process of correcting the second activity based on the total air volume, the third activity, and the total flue gas volume can be seen in the following formula:

[0076]

[0077] Among them, A′ y is the corrected second activity. A y is the second activity. A k is the third activity. y is the total amount of flue gas. k is the total air volume. It is the proportion of CO2 in the air and can be measured or taken as 0.031%.

[0078] Therefore, the process of determining the fossil carbon emissions of carbon emission sources can be referred to the following formula:

[0079]

[0080] The above process eliminates the influence of carbon in the air, thereby improving the accuracy of the second activity, and further improving the accuracy of determining the fossil carbon emissions of carbon emission sources.

[0081] Step 205: Determine a ratio between the first activity and the second activity, and determine the fossil carbon emissions of the carbon emission source based on the product of the ratio and the total CO2 emissions.

[0082] In the present application, the specific implementation process of step 205 can be found in the detailed description of any embodiment of the present application and will not be repeated here.

[0083] In this application, the flow rate and CO2 concentration of the flue gas emitted by the carbon emission source during the emission period are obtained to determine the total CO2 emissions during the emission period based on the CO2 concentration and flow rate. Subsequently, the first activity of carbon-14 in the organic solid waste mixed with the combustion during the emission period and the second activity of carbon-14 in the flue gas are measured. The total amount of air supplied for combustion during the emission period is measured and the third activity of carbon-14 in the air supplied for combustion is determined. Then, the total amount of flue gas during the emission period is determined based on the flow rate. The second activity is corrected based on the total air amount, the third activity and the total amount of flue gas, and the ratio between the first activity and the second activity is determined. The fossil carbon emissions of the carbon emission source are determined based on the product of the ratio and the total CO2 emissions. Thus, the influence of carbon in the air is eliminated, thereby improving the accuracy of the second activity and further improving the accuracy of determining the fossil carbon emissions of the carbon emission source.

[0084] In order to implement the above embodiment, the embodiment of the present application also proposes a fossil source carbon emission metering device for burning coal mixed with organic solid waste. Figure 3 This is a schematic structural diagram of a fossil source carbon emission metering device for coal-fired combustion of organic solid waste provided in an embodiment of the present application.

[0085] like Figure 3 As shown, the fossil source carbon emission metering device 300 for burning coal mixed with organic solid waste includes:

[0086] An acquisition module 310 is configured to acquire the flow rate and CO2 concentration of flue gas emitted by the carbon emission source during an emission period, so as to determine the total amount of CO2 emissions during the emission period based on the CO2 concentration and flow rate;

[0087] The measurement module 320 is used to measure the first activity of carbon-14 in the organic solid waste and the second activity of carbon-14 in the flue gas during the emission period;

[0088] The determination module 330 is configured to determine a ratio between the first activity and the second activity, so as to determine the fossil carbon emissions of the carbon emission source based on the product of the ratio and the total CO2 emissions.

[0089] In a possible implementation of another aspect of the present application, a correction module is further included, which is configured to:

[0090] Measure the total amount of air supplied to the combustion during the emission period and determine the third activity of carbon-14 in the air supplied to the combustion;

[0091] The total amount of flue gas in the emission period is determined based on the flow rate, so as to correct the second activity based on the total air volume, the third activity and the total amount of flue gas.

[0092] In a possible implementation of another embodiment of the present application, the organic solid waste includes multiple types of fuels, and the measurement module 320 is used to:

[0093] Measure the fourth activity of carbon 14 in each type of fuel and the weight of each type of fuel;

[0094] The first activity is determined as the ratio of the sum of the products of the weight of each type of fuel and the fourth activity to the sum of the weight of each type of fuel.

[0095] In a possible implementation of another embodiment of the present application, the measurement module 320 is configured to:

[0096] The organic solid waste is calcined at high temperature to convert the released CO2 into benzene, which is then measured using liquid scintillation counting to determine the first activity of carbon-14 in the organic solid waste.

[0097] The CO2 in the flue gas is converted into graphite, which is then measured using accelerated mass spectrometry to determine the second activity of carbon-14 in the flue gas.

[0098] It should be noted that the above explanation of the embodiment of the fossil source carbon emission metering method for coal-fired combustion of organic solid waste is also applicable to the fossil source carbon emission metering device for coal-fired combustion of organic solid waste in this embodiment, so it will not be repeated here.

[0099] In this application, the flow rate and CO2 concentration of the flue gas emitted by the carbon emission source during the emission period are obtained to determine the total CO2 emissions during the emission period based on the CO2 concentration and flow rate. Subsequently, the first activity of carbon-14 in the organic solid waste co-combusted during the emission period and the second activity of carbon-14 in the flue gas are measured. Then, the ratio between the first activity and the second activity is determined to determine the fossil carbon emissions of the carbon emission source based on the product of the ratio and the total CO2 emissions. Thus, the fossil carbon emissions of the carbon emission source are determined based on the difference in carbon-14 activity in the organic solid waste and the coal. This improves the accuracy of the measurement of fossil carbon emissions from the combustion of organic solid waste with coal.

[0100] In order to implement the above embodiment, the present application also provides a computer device including a processor and a memory;

[0101] The processor runs the program corresponding to the executable program code by reading the executable program code stored in the memory, so as to implement the fossil source carbon emission measurement method for coal-fired mixed combustion of organic solid waste as described in the above embodiment.

[0102] In order to implement the above embodiment, the embodiment of the present application also proposes a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, it implements the fossil source carbon emission measurement method for coal-fired mixed with organic solid waste as described in the above embodiment.

[0103] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for measuring fossil carbon emissions from coal-fired mixed combustion of organic solid waste, characterized in that: include: Obtaining the flow rate and CO2 concentration of flue gas emitted by the carbon emission source during an emission period, so as to determine the total amount of CO2 emissions during the emission period based on the CO2 concentration and the flow rate; measuring a first activity of carbon-14 in the organic solid waste co-combusted during the emission period, and a second activity of carbon-14 in the flue gas; determining a ratio between the first activity and the second activity, and determining the fossil carbon emissions of the carbon emission source based on the product of the ratio and the total CO2 emissions; The organic solid waste contains multiple types of fuels, and the measuring of the first activity of carbon-14 in the organic solid waste blended and burned during the emission period includes: measuring the carbon-14 activity in each of said types of fuel and the weight of each of said types of fuel; determining the first activity as the ratio of the sum of the products of the weight of each type of fuel and the fourth activity to the sum of the weight of each type of fuel; The measuring of the first activity of carbon-14 in the organic solid waste co-combusted during the emission period and the second activity of carbon-14 in the flue gas includes: calcining the organic solid waste at high temperature to convert the released CO2 into benzene, and measuring the benzene using liquid scintillation counting to determine the first activity of carbon-14 in the organic solid waste; The CO2 in the flue gas is converted into graphite, and the graphite is measured using accelerated mass spectrometry to determine the second activity of carbon-14 in the flue gas.

2. The method according to claim 1, wherein Before determining the ratio between the first activity and the second activity and determining the fossil carbon emissions of the carbon emission source based on the product of the ratio and the total CO2 emissions, the method further includes: measuring the total amount of air supplied to the combustion during the emission period and determining the third activity of carbon-14 in the air supplied to the combustion; The total amount of flue gas in an emission period is determined based on the flow rate, so as to correct the second activity based on the total air volume, the third activity and the total amount of flue gas.

3. A fossil carbon emission metering device for coal-fired organic solid waste, characterized in that: include: An acquisition module, configured to acquire the flow rate and CO2 concentration of flue gas emitted by the carbon emission source during an emission period, so as to determine the total amount of CO2 emitted during the emission period based on the CO2 concentration and the flow rate; a measurement module for measuring a first activity of carbon-14 in the organic solid waste co-combusted during the emission period, and a second activity of carbon-14 in the flue gas; a determination module, configured to determine a ratio between the first activity and the second activity, and determine the fossil carbon emissions of the carbon emission source based on a product of the ratio and the total CO2 emissions; The organic solid waste includes various types of fuels, and the measurement module is used to: measuring the carbon-14 activity in each of said types of fuel and the weight of each of said types of fuel; determining the first activity as the ratio of the sum of the products of the weight of each type of fuel and the fourth activity to the sum of the weight of each type of fuel; The measurement module is used to: calcining the organic solid waste at high temperature to convert the released CO2 into benzene, and measuring the benzene using liquid scintillation counting to determine the first activity of carbon-14 in the organic solid waste; The CO2 in the flue gas is converted into graphite, and the graphite is measured using accelerated mass spectrometry to determine the second activity of carbon-14 in the flue gas.

4. The device according to claim 3, characterized in that Also includes correction modules for: measuring the total amount of air supplied to the combustion during the emission period and determining the third activity of carbon-14 in the air supplied to the combustion; The total amount of flue gas in an emission period is determined based on the flow rate, so as to correct the second activity based on the total air volume, the third activity and the total amount of flue gas.

5. An electronic device, characterized in that: include: a processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 2.

6. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 1 to 2 when being executed by a processor.

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