Coal-fired power plant carbon emissions online monitoring device and its calculation method and storage medium

Abstract

The present invention provides an on-line monitoring device for carbon emissions of a coal-fired power plant, its accounting method and a storage medium, including the following steps: calculating the total theoretical CO2 emissions according to the O2 content data in the raw flue gas and the fuel characteristic coefficient data; calculating the total carbon emissions of the coal-fired power plant according to the carbon emissions data during boiler combustion, the carbon emissions data generated during desulfurization and the carbon emissions data of the electricity purchased externally by the boiler; checking the total carbon emissions data of the coal-fired power plant according to the total theoretical CO2 emissions data so as to control the relative calculation deviation of the total carbon emissions data of the coal-fired power plant; in this way, data can be collected in real time, the accounting process is simple, and there are fewer interference factors, the calculation accuracy of the carbon emissions of the coal-fired power plant is relatively high, and the relative deviation of the calculated total carbon emissions of the power generation enterprise is relatively small after checking, reducing the production cost.

Description

Technical Field

[0001] The present invention relates to the technical field of coal-fired thermal power generation units, and in particular to an online monitoring device for carbon emissions of a coal-fired power plant, a calculation method thereof, and a storage medium. Background Art

[0002] The total carbon emissions of power generation companies are generated by the combustion of fossil fuels 2 Emissions, CO from desulfurization process 2 Emissions and CO generated by purchased electricity 2 The total carbon emissions of power generation enterprises are calculated by the sum of the emissions. At present, the domestic power industry has formed a total carbon emissions calculation system for power generation enterprises based on the emission factor method. The process of calculating the total carbon emissions of power generation enterprises using the emission factor method is as follows:

[0003] E 燃烧 =AD×EF (1)

[0004] AD=NCV×FC (2)

[0005]

[0006]

[0007]

[0008] Among them, the calculation formula is:

[0009] E 燃烧 To calculate and report the CO generated by fuel combustion in the year 2 Emissions, in tCO 2 ;

[0010] AD is the activity data of fossil fuels in the accounting and reporting year, and its unit is GJ;

[0011] EF is the CO of fossil fuels 2 Emission factor, in tCO 2 / GJ;

[0012] NCV is the average lower calorific value of fossil fuels, expressed in GJ / t;

[0013] FC is the net consumption, and its unit is t;

[0014] CC is the carbon content per unit calorific value of fossil fuels, and its unit is tC / GJ;

[0015] OF is the carbon oxidation rate of fossil fuels, and its unit is %.

[0016] For CO 2 The ratio of the relative molecular weight of C.

[0017] Emission factor method to calculate the CO generated by desulfurization process 2 The emissions are calculated as follows:

[0018] Where:

[0019] E 脱硫 =CAL k ×EF k (6)

[0020] CAL k =B k ×I k (7)

[0021] EF k =EF k，t ×TR (8)

[0022] E 脱硫 ——CO produced during desulfurization process 2 Emissions, in tCO 2 ;

[0023] CAL k ——The carbonate consumption in the kth desulfurizer, in t;

[0024] EF k ——Emission factor of carbonate in the kth desulfurizer, in tCO 2 / t;

[0025] B k ——The consumption of desulfurizer in the whole year, in tons;

[0026] I k ——Carbonate content in desulfurizer, in %;

[0027] EF k，t ——Emission factor of the desulfurization process when fully converted, in tCO 2 / t,

[0028] TR——conversion rate, expressed in %. The conversion rate of the desulfurization process should be 100%.

[0029] In 2019, a certain plant's 660MW ultra-supercritical unit consumed 1,507,619 tons of raw coal, 39,752 tons of desulfurization limestone, and 8,282.7 MWh of purchased electricity. The experimental data calculated according to the above-mentioned traditional emission factor method are shown in the following table.

[0030]

[0031]

[0032] However, the above calculation method is based on annual data collection, which has problems such as low data collection efficiency, complex calculation process, many interference factors and large relative deviation of carbon emissions calculation of power generation enterprises. In order to better monitor the carbon emission accounting and reporting data of coal-fired power plants and formulate more scientific carbon reduction plans, it is imperative to carry out real-time monitoring of carbon emissions from coal-fired power plants and research on the total carbon emissions accounting method of coal-fired power plants. Summary of the invention

[0033] In order to solve the above technical problems, the present invention provides an online monitoring device for carbon emissions from coal-fired power plants and a calculation method and storage medium thereof, which can collect data in real time, have a simple calculation process, and have fewer interference factors. The calculation accuracy of carbon emissions from coal-fired power plants is high, and the relative deviation of the total carbon emissions of power generation enterprises after verification is small, thereby reducing production costs.

[0034] In order to achieve the above object, the technical solution of the present invention is as follows:

[0035] A method for online monitoring and accounting of carbon emissions from a coal-fired power plant comprises the following steps:

[0036] Real-time collection of flue gas data at the inlet of the desulfurization equipment, data on purchased electricity during the accounting reporting period, and data on average power supply emission factors of the regional power grid. The flue gas data include: standard flow data of dry flue gas, O in the original flue gas, 2 Content data and SO in original flue gas 2 Content data;

[0037] According to the original flue gas O 2 Calculate CO using content data and fuel characteristic coefficient data 2 Theoretical total emissions;

[0038] According to the dry flue gas standard flow data, fuel characteristic coefficient data and O 2 Content data to calculate boiler combustion carbon emissions;

[0039] According to the dry flue gas standard flow data, SO 2 The carbon emissions generated during the desulfurization process are calculated based on the content data and the calcium-sulfur ratio data of wet desulfurization;

[0040] Calculate the carbon emissions from purchased electricity from boilers based on the purchased electricity data during the accounting reporting period and the average power supply emission factor data of the regional power grid;

[0041] The total carbon emissions of coal-fired power plants are calculated based on the carbon emissions from boiler combustion, the carbon emissions from the desulfurization process, and the carbon emissions from purchased electricity from the boiler;

[0042] According to CO 2The theoretical total emission data are used to calibrate the total carbon emission data of coal-fired power plants so as to control the relative calculation deviation of the total carbon emission data of coal-fired power plants.

[0043] The present invention provides an online monitoring device for carbon emissions from coal-fired power plants, a calculation method and a storage medium thereof, which can collect data in real time, have a simple calculation process, and have fewer interference factors. The calculation accuracy of carbon emissions from coal-fired power plants is high, and the relative deviation of carbon emissions calculated by power generation enterprises after verification is small, thereby reducing production costs.

[0044] As the preferred technical solution, according to the O 2 Calculate CO using content data and fuel characteristic coefficient data 2 The calculation formula for the theoretical total emissions is as follows:

[0045] 21-O 2 =(1+β)×RO 2

[0046] Where: In the calculation formula, RO 2 For CO 2 Theoretical total emissions;

[0047] O 2 O in the original flue gas 2 Content data;

[0048] β is the fuel characteristic coefficient data.

[0049] As an optimal technical solution, according to the dry flue gas standard flow data, fuel characteristic coefficient data and O 2 The calculation formula for calculating the carbon emissions from boiler combustion using content data is as follows:

[0050]

[0051] The calculation formula is:

[0052] E rs is the carbon emission from boiler combustion, the unit is t / h;

[0053] V rg is the standard flow data of dry flue gas, and its unit is m 3 / h;

[0054] β is the fuel characteristic coefficient data;

[0055] O 2 O in the original flue gas 2 Content data, the unit is %.

[0056] As the preferred technical solution, according to the dry flue gas standard flow data, SO 2The calculation formula for calculating the carbon emissions generated during the desulfurization process based on the content data and the calcium-sulfur ratio data of wet desulfurization is as follows:

[0057]

[0058] The calculation formula is:

[0059] E tl It is the carbon emission generated in the desulfurization process, and its unit is t / h;

[0060] V rg It is the standard flow data of dry flue gas, and its unit is m 3 / h;

[0061] SO 2 SO in the original flue gas 2 Content data, the unit is mg / m 3 ;

[0062] The data for calcium-sulfur ratio in wet desulfurization.

[0063] As the preferred technical solution, the formula for calculating the carbon emissions of purchased electricity from boilers is as follows based on the purchased electricity data during the accounting reporting period and the average power supply emission factor data of the regional power grid:

[0064] E 电 =AD 电 ×EF 电

[0065] The calculation formula is:

[0066] E 电 Carbon emission data for purchased electricity for boilers;

[0067] AD 电 To calculate the purchased electricity data during the reporting period, the unit is MWh;

[0068] EF 电 It is the average power supply emission factor data of the regional power grid.

[0069] As a preferred technical solution, the calculation formula for calculating the total carbon emissions of coal-fired power plants is as follows based on the carbon emissions data of boiler combustion, the carbon emissions data generated during the desulfurization process, and the carbon emissions data of boiler purchased electricity:

[0070] E=E rs +E tl +E 电

[0071] The calculation formula is:

[0072] E is the total carbon emissions of coal-fired power plants, in t / h;

[0073] E rs is the carbon emission from boiler combustion, the unit is t / h;

[0074] E tl is the carbon emission from boiler combustion, the unit is t / h;

[0075] E 电 It is the carbon emission of purchased electricity for boiler, and its unit is t / h.

[0076] The present invention provides an online monitoring device for carbon emissions of a coal-fired power plant, comprising:

[0077] The collection module is used to collect the flue gas data at the inlet of the desulfurization equipment, the purchased electricity data during the accounting reporting period, and the average power supply emission factor data of the regional power grid in real time. The flue gas data includes: dry flue gas standard flow data, O 2 Content data and SO in original flue gas 2 Content data;

[0078] CO 2 Theoretical emission total amount calculation module is used to calculate the total amount of O in the original flue gas. 2 Calculate CO using content data and fuel characteristic coefficient data 2 Theoretical total emissions, the acquisition module and the CO 2 Theoretical total emission calculation module connection;

[0079] The boiler combustion carbon emission calculation module is used to calculate the carbon emission of the boiler combustion carbon emission according to the desulfurization inlet dry flue gas standard flow data, fuel characteristic coefficient data and the original flue gas O 2 The content data is used to calculate the carbon emission of boiler combustion, and the acquisition module is connected to the boiler combustion carbon emission calculation module;

[0080] The carbon emission calculation module generated during the desulfurization process is used to calculate the carbon emission generated during the desulfurization process based on the standard flow data of the dry flue gas in the desulfurization inlet, the SO 2 The carbon emission generated in the desulfurization process is calculated based on the content data and the calcium-sulfur ratio data of wet desulfurization, and the acquisition module is connected to the carbon emission calculation module generated in the desulfurization process;

[0081] A boiler purchased electricity carbon emission calculation module is used to calculate the boiler purchased electricity carbon emission based on the purchased electricity data and the regional power grid average power supply emission factor data during the accounting reporting period. The acquisition module is connected to the boiler purchased electricity carbon emission calculation module;

[0082] A coal-fired power plant carbon emission total amount calculation module is used to calculate the coal-fired power plant carbon emission total amount according to the boiler combustion carbon emission data, the carbon emission data generated during the desulfurization process and the boiler purchased electricity carbon emission data. The boiler combustion carbon emission calculation module, the carbon emission calculation module generated during the desulfurization process and the boiler purchased electricity carbon emission calculation module are respectively connected to the coal-fired power plant carbon emission total amount calculation module;

[0083] Calibration module for 2 The theoretical total emission data is used to calibrate the total carbon emission data of coal-fired power plants to control the relative error of the total carbon emission data of coal-fired power plants. 2 The theoretical total emission calculation module and the coal-fired power plant carbon emission total calculation module are respectively connected to the verification module.

[0084] As a preferred technical solution, it includes: a fuel characteristic coefficient module, which is used to estimate fuel characteristic coefficient data based on empirical data of various coal qualities, and the fuel characteristic coefficient module is respectively connected to CO 2 The theoretical total emission calculation module is connected with the boiler combustion carbon emission calculation module.

[0085] As an optimal technical solution, it includes: a wet desulfurization calcium-sulfur ratio value-taking module, which is used to obtain wet desulfurization calcium-sulfur ratio value data according to the design value of the desulfurization manufacturer, and the carbon emission calculation module generated during the desulfurization process is connected to the wet desulfurization calcium-sulfur ratio value-taking module.

[0086] The present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for online monitoring and accounting of carbon emissions from a coal-fired power plant as described in any one of the above. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] Figure 1 It is a flow chart of an online monitoring device for carbon emissions of coal-fired power plants;

[0088] Figure 2 It is a structural diagram of an online monitoring device for carbon emissions in a coal-fired power plant;

[0089] Among them, 1- boiler; 2- steam transmission pipeline; 3- steam turbine; 4- generator; 5- main transformer booster; 6- power grid; 7- high-voltage transformer step-down; 8- equipment in the power plant; 9- external power equipment; 10- starting transformer; 11- first flue gas transmission pipeline; 12- electrostatic precipitator; 13- second flue gas transmission pipeline; 14- desulfurization equipment; 15- flue gas exhaust pipeline; 16- induced draft fan; 17- flue gas online detector; 18- electricity meter; 19- processor; 20- calibrator; 21- coal; 22- air; 23- fuel characteristic coefficient estimator; 24- wet desulfurization calcium sulfur ratio valuer; 25- chimney. DETAILED DESCRIPTION

[0090] It should be noted that the use of terms such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0091] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0092] It can be understood that the present invention achieves the purpose of the present invention through some embodiments.

[0093] like Figure 1 As shown, the present invention provides an online monitoring device for carbon emissions of a coal-fired power plant, comprising:

[0094] The collection module is used to collect the flue gas data at the inlet of the desulfurization equipment 14, the purchased electricity data during the accounting reporting period, and the average power supply emission factor data of the regional power grid in real time. The flue gas data includes: dry flue gas standard flow data, O 2 Content data and SO in original flue gas 2 Content data;

[0095] The fuel characteristic coefficient module is used to estimate the fuel characteristic coefficient based on empirical data of various coal qualities. The fuel characteristic coefficient module is respectively related to CO 2 The theoretical total emission calculation module is connected with the boiler combustion carbon emission calculation module;

[0096] CO 2 Theoretical emission total amount calculation module is used to calculate the total amount of O in the original flue gas. 2 Calculate CO using content data and fuel characteristic coefficient data 2 Theoretical total emissions, the acquisition module and the CO 2 Theoretical total emission calculation module connection;

[0097] The boiler combustion carbon emission calculation module is used to calculate the carbon emission of the boiler combustion carbon emission according to the desulfurization inlet dry flue gas standard flow data, fuel characteristic coefficient data and the original flue gas O 2The content data is used to calculate the carbon emissions of boiler combustion, and the acquisition module is connected to the boiler combustion carbon emissions calculation module;

[0098] The wet desulfurization calcium-sulfur ratio value-taking module is used to obtain the wet desulfurization calcium-sulfur ratio value-taking data according to the design value of the desulfurization manufacturer. The carbon emissions calculation module generated during the desulfurization process is connected to the wet desulfurization calcium-sulfur ratio value-taking module;

[0099] The carbon emissions calculation module generated during the desulfurization process is used to calculate the carbon emissions generated during the desulfurization process according to the dry flue gas standard state flow data at the desulfurization inlet, the SO 2 content data in the original flue gas and the wet desulfurization calcium-sulfur ratio data. The acquisition module is connected to the carbon emissions calculation module generated during the desulfurization process;

[0100] The carbon emissions calculation module for boiler purchased electricity is used to calculate the carbon emissions of boiler purchased electricity according to the purchased electricity data during the accounting reporting period and the regional power grid average power supply emission factor data. The acquisition module is connected to the carbon emissions calculation module for boiler purchased electricity;

[0101] The total carbon emissions calculation module of the coal-fired power plant is used to calculate the total carbon emissions of the coal-fired power plant according to the boiler combustion carbon emissions data, the carbon emissions data generated during the desulfurization process, and the carbon emissions data of the boiler purchased electricity. The boiler combustion carbon emissions calculation module, the carbon emissions calculation module generated during the desulfurization process, and the carbon emissions calculation module for boiler purchased electricity are respectively connected to the total carbon emissions calculation module of the coal-fired power plant;

[0102] The verification module is used to verify the total carbon emissions data of the coal-fired power plant according to the CO 2 theoretical emission total data to control the relative error of the total carbon emissions data of the coal-fired power plant. The CO 2 theoretical emission total calculation module and the total carbon emissions calculation module of the coal-fired power plant are respectively connected to the verification module.

[0103] The present invention provides an on-line monitoring and accounting method for carbon emissions of a coal-fired power plant, including the following steps:

[0104] Real-time collect the flue gas data at the inlet of the desulfurization equipment, the purchased electricity data during the accounting reporting period, and the regional power grid average power supply emission factor data. The data of the flue gas includes: dry flue gas standard state flow data, O 2 content data in the original flue gas and SO 2 content data in the original flue gas;

[0105] According to the O 2 content data in the original flue gas and the fuel characteristic coefficient data, calculate the CO 2 theoretical emission total;

[0106] According to the dry flue gas standard flow data, fuel characteristic coefficient data and O 2 Content data to calculate boiler combustion carbon emissions;

[0107] According to the dry flue gas standard flow data, SO 2 The carbon emissions generated during the desulfurization process are calculated based on the content data and the calcium-sulfur ratio data of wet desulfurization;

[0108] Calculate the carbon emissions from purchased electricity from boilers based on the purchased electricity data during the accounting reporting period and the average power supply emission factor data of the regional power grid;

[0109] The total carbon emissions of coal-fired power plants are calculated based on the carbon emissions from boiler combustion, the carbon emissions from the desulfurization process, and the carbon emissions from purchased electricity from the boiler;

[0110] According to CO 2 Theoretical total emission data are used to calibrate the total carbon emission data of coal-fired power plants to control the relative calculation deviation of the total carbon emission data of coal-fired power plants;

[0111] β is the fuel characteristic coefficient, and its calculation formula is:

[0112]

[0113] Since it is generally difficult to obtain elemental analysis results of coal in real time at coal-fired power plants, the data in Table 1 below are used for estimation.

[0114] Table 1 Fuel characteristic coefficients

[0115]

[0116] According to the O 2 Calculate CO using content data and fuel characteristic coefficient data 2 The calculation formula for the theoretical total emissions is as follows:

[0117] 21-O 2 =(1+β)×RO 2

[0118] Where: In the calculation formula, RO 2 For CO 2 Theoretical total emissions;

[0119] O 2 O in the original flue gas 2 Content data;

[0120] β is the fuel characteristic coefficient data.

[0121] According to the dry flue gas standard flow data, fuel characteristic coefficient data and O 2The calculation formula for calculating the carbon emissions from boiler combustion using content data is as follows:

[0122]

[0123] The calculation formula is:

[0124] E rs is the carbon emission from boiler combustion, the unit is t / h;

[0125] V rg is the standard flow data of dry flue gas, and its unit is m 3 / h;

[0126] β is the fuel characteristic coefficient data;

[0127] O 2 O in the original flue gas 2 Content data, the unit is %.

[0128] According to the dry flue gas standard flow data, SO 2 The calculation formula for calculating the carbon emissions generated during the desulfurization process based on the content data and the calcium-sulfur ratio data of wet desulfurization is as follows:

[0129]

[0130] The calculation formula is:

[0131] E tl It is the carbon emission generated in the desulfurization process, and its unit is t / h;

[0132] V rg is the standard flow data of dry flue gas, and its unit is m 3 / h;

[0133] SO 2 SO in the original flue gas 2 Content data, the unit is mg / m 3 ;

[0134] The data for calcium-sulfur ratio in wet desulfurization.

[0135] The formula for calculating the carbon emissions from purchased electricity from boilers is as follows based on the purchased electricity data during the accounting reporting period and the average power supply emission factor data of the regional power grid:

[0136] E 电 =AD 电 ×EF 电

[0137] The calculation formula is:

[0138] E 电Carbon emission data for purchased electricity for boilers;

[0139] AD 电 To calculate the purchased electricity data during the reporting period, the unit is MWh;

[0140] EF 电 It is the average power supply emission factor data of the regional power grid.

[0141] The calculation formula for calculating the total carbon emissions of coal-fired power plants based on the carbon emissions from boiler combustion, the carbon emissions from the desulfurization process, and the carbon emissions from purchased electricity from the boiler is as follows:

[0142] E=E rs +E tl +E 电

[0143] The calculation formula is:

[0144] E is the total carbon emissions of coal-fired power plants, in t / h;

[0145] E rs is the carbon emission from boiler combustion, the unit is t / h;

[0146] E tl is the carbon emission from boiler combustion, the unit is t / h;

[0147] E 电 It is the carbon emission of purchased electricity for boiler, and its unit is t / h.

[0148] like Figure 2As shown, the present invention provides an online monitoring device for carbon emissions in a coal-fired power plant, comprising: a boiler 1, wherein the steam outlet of the boiler 1 is connected to a steam turbine 3 through a steam transmission pipeline 2, the steam turbine 3 is connected to a generator 4 through a transmission connection, the generator 4 is connected to a power grid 6 through a main transformer step-up device 5, the generator 4 is connected to a device 8 in the power plant through a high-voltage transformer step-down device 7, the external electrical device 9 is connected to the device 8 in the power plant through a starting transformer 10, the flue gas outlet of the boiler 1 is connected to an electrostatic precipitator 12 through a first flue gas transmission pipeline 11, the electrostatic precipitator 12 is connected to an inlet of a desulfurization device 14 through a second flue gas transmission pipeline 13, and the second flue gas transmission pipeline 13 is connected to a The outlet of the desulfurization equipment 14 is connected to the chimney 25 through the flue gas exhaust pipe 15. The boiler 1 heats the feed water to generate steam after combustion, and enters the steam turbine 3 to work, driving the generator 4 to rotate and generate electricity. Most of the power generation is sent to the power grid 6 after passing through the main transformer booster 5. A small part of the power at the generator outlet is supplied to the power plant equipment 8 through the high-voltage transformer step-down device 7. In addition, during the start-up and shutdown process, external electricity is required, and the external electricity is introduced through the start-up transformer to supply the power plant equipment 8. The flue gas generated by coal combustion is cooled by heat exchange and denitrified, and then enters the electrostatic precipitator 12 to capture and remove most of the fly ash in the flue gas. The flue gas passes through the desulfurization equipment 14 and uses the limestone wet method to remove most of the SO 2 The removed flue gas is discharged into the chimney 25, and the slag produced by the combustion of the boiler 1 is discharged through a slag remover (not shown) at the bottom of the furnace.

[0149] A flue gas online detector 17 is connected to the inlet of the desulfurization equipment. The flue gas online detector 17 is used to collect flue gas data at the inlet of the desulfurization equipment 14 in real time. The flue gas data includes: dry flue gas standard flow data, O in the original flue gas 2 Content data and SO in original flue gas 2 Content data, an electricity meter 18 is provided at the connection between the external electrical equipment 9 and the equipment 8 in the power plant through the starting transformer 10, and the electricity meter 18 collects the purchased electricity data and the average power supply emission factor data of the regional power grid in real time during the accounting reporting period, and the fuel characteristic coefficient estimator 23 is used to estimate the fuel characteristic coefficient based on empirical data of various coal qualities, and the wet desulfurization calcium-sulfur ratio valuer 24 is used to take the wet desulfurization calcium-sulfur ratio value data according to the design value of the desulfurization manufacturer, and the flue gas online detector 17, the electricity meter 18, the fuel characteristic coefficient estimator 23 and the wet desulfurization calcium-sulfur ratio valuer 24 are electrically connected to the processor 19 respectively, and the processor 19 is electrically connected to the calibrator 20;

[0150] When the online monitoring device for carbon emissions of coal-fired power plants is working, the flue gas online detector 10 collects flue gas data signals and sends the flue gas data signals to the processor 19; the electricity meter 18 collects the purchased electricity signal and the regional power grid average power supply emission factor signal during the accounting reporting period, and sends the purchased electricity signal and the regional power grid average power supply emission factor signal during the accounting reporting period to the processor 19; the fuel characteristic coefficient estimator 23 collects empirical data of various different coal qualities and estimates the fuel characteristic coefficient signal based on the experience of various different coal qualities, and sends the fuel characteristic coefficient signal to the processor 19; the wet desulfurization calcium sulfur ratio valuer 24 collects the desulfurization manufacturer's design value data and takes the wet desulfurization calcium sulfur ratio value signal according to the desulfurization manufacturer's design value data, and sends the wet desulfurization calcium sulfur ratio value signal to the processor 19; the processor 19 detects the flue gas data, the purchased electricity, the regional power grid average power supply emission factor, the fuel characteristic coefficient and the wet desulfurization calcium sulfur ratio value signal, processes the calculation signal, and sends the processed and calculated CO to the calibrator 20. 2 Theoretical total emissions data and CO2 emissions from coal-fired power plants 2 The total carbon emission data, the calibrator 20 receives CO 2 Theoretical total emissions data and CO2 emissions from coal-fired power plants 2 Total carbon emissions data and CO 2 The theoretical total emission data are used to calibrate the total carbon emission data of coal-fired power plants so as to control the relative calculation deviation of the total carbon emission data of coal-fired power plants.

[0151] In 2019, a 660MW ultra-supercritical unit of a certain plant consumed 1,507,619 tons of raw coal, 39,752 tons of desulfurization limestone, and 8,282.7 MWh of purchased electricity. The experimental data of the total carbon emissions were calculated according to the method of the present invention, as shown in Table 2 below:

[0152] Table 2 Experimental data of calculating total carbon emissions by the method of the present invention

[0153]

[0154] From Table 2, the experimental data of the total carbon emissions calculated by an online monitoring method for carbon emissions from a coal-fired power plant provided by the present invention can be observed that the relative deviation of the calculated carbon emissions from the coal-fired power plant is only 0.08849%. The calculation method is simple, with fewer interference factors. The calculation accuracy of the carbon emissions from the coal-fired power plant is high. After verification, the relative deviation of the carbon emissions calculated by the power generation enterprise is small, saving production costs.

[0155] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all various changes or equivalent substitutions falling within the scope of the claims of the present application are included. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope protected by the present invention.

Claims

1. A method for online monitoring and calculation of carbon emissions from coal-fired power plants. It is characterized in that The following steps are involved: Real-time collection of flue gas data at the inlet of the desulfurization equipment, data on purchased electricity during the accounting reporting period, and data on average power supply emission factors of the regional power grid. The flue gas data include: standard flow data of dry flue gas, O in the original flue gas, 2 Content data and SO in original flue gas 2 Content data; According to the O 2 Calculate CO using content data and fuel characteristic coefficient data 2 Theoretical total emissions are calculated as follows: ； Where: In the calculation formula, RO 2 For CO 2 Theoretical total emissions; O 2 O in the original flue gas 2 Content data; β is the fuel characteristic coefficient data; According to the dry flue gas standard flow data, fuel characteristic coefficient data and O 2 The carbon emissions from boiler combustion are calculated based on the content data. The calculation formula is as follows: ； The calculation formula is: is the carbon emission from boiler combustion, the unit is t / h; It is the standard flow data of dry flue gas, and its unit is m 3 / h; is the fuel characteristic coefficient data; O in the original flue gas 2 Content data, the unit is %; According to the dry flue gas standard flow data, SO 2 The carbon emissions generated during the desulfurization process are calculated based on the content data and the calcium-sulfur ratio data of wet desulfurization. The calculation formula is as follows: ； The calculation formula is: It is the carbon emission generated in the desulfurization process, and its unit is t / h; is the standard flow data of dry flue gas, and its unit is m 3 / h; SO in the original flue gas 2 Content data, the unit is mg / m 3 ; The calcium-sulfur ratio value data for wet desulfurization; The carbon emissions from purchased electricity from the boiler are calculated based on the purchased electricity data during the accounting reporting period and the average power supply emission factor data of the regional power grid. The calculation formula is as follows: ； The calculation formula is: Carbon emission data for purchased electricity for boilers; To calculate the purchased electricity data during the reporting period, the unit is MWh; The data of average power supply emission factors of regional power grid; The total carbon emissions of coal-fired power plants are calculated based on the carbon emissions from boiler combustion, the carbon emissions from the desulfurization process, and the carbon emissions from purchased electricity from the boiler. The calculation formula is as follows: E=E rs + E tl + E 电 ; The calculation formula is: E is the total carbon emissions of coal-fired power plants, in t / h; E rs is the carbon emission from boiler combustion, the unit is t / h; E tl is the carbon emission from boiler combustion, the unit is t / h; E 电 is the carbon emission of purchased electricity from the boiler, in t / h; According to CO 2 The theoretical total emission data are used to calibrate the total carbon emission data of coal-fired power plants so as to control the relative calculation deviation of the total carbon emission data of coal-fired power plants.

2. An online monitoring device for carbon emissions from coal-fired power plants, It is characterized in that The method for online monitoring and accounting of carbon emissions from coal-fired power plants as described in claim 1 of the application right comprises: The collection module is used to collect the flue gas data at the inlet of the desulfurization equipment, the purchased electricity data during the accounting reporting period, and the average power supply emission factor data of the regional power grid in real time. The flue gas data includes: dry flue gas standard flow data, O 2 Content data and SO in original flue gas 2 Content data; CO 2 Theoretical emission total amount calculation module is used to calculate the total amount of O in the original flue gas. 2 Calculate CO using content data and fuel characteristic coefficient data 2 Theoretical total emissions, the acquisition module and the CO 2 Theoretical total emission calculation module connection; The boiler combustion carbon emission calculation module is used to calculate the carbon emission of the boiler combustion carbon emission according to the desulfurization inlet dry flue gas standard flow data, fuel characteristic coefficient data and the original flue gas O 2 The content data is used to calculate the carbon emission of boiler combustion, and the acquisition module is connected to the boiler combustion carbon emission calculation module; The carbon emission calculation module generated during the desulfurization process is used to calculate the carbon emission generated during the desulfurization process based on the standard flow data of the dry flue gas in the desulfurization inlet, the SO 2 The carbon emission generated in the desulfurization process is calculated based on the content data and the calcium-sulfur ratio data of wet desulfurization, and the acquisition module is connected to the carbon emission calculation module generated in the desulfurization process; A boiler purchased electricity carbon emission calculation module is used to calculate the boiler purchased electricity carbon emission based on the purchased electricity data and the regional power grid average power supply emission factor data during the accounting reporting period. The acquisition module is connected to the boiler purchased electricity carbon emission calculation module; A coal-fired power plant carbon emission total amount calculation module is used to calculate the coal-fired power plant carbon emission total amount according to the boiler combustion carbon emission data, the carbon emission data generated during the desulfurization process and the boiler purchased electricity carbon emission data. The boiler combustion carbon emission calculation module, the carbon emission calculation module generated during the desulfurization process and the boiler purchased electricity carbon emission calculation module are respectively connected to the coal-fired power plant carbon emission total amount calculation module; Calibration module for 2 The theoretical total emission data is used to calibrate the total carbon emission data of coal-fired power plants to control the relative error of the total carbon emission data of coal-fired power plants. 2 The theoretical total emission calculation module and the coal-fired power plant carbon emission calculation module are respectively connected to the verification module.

3. The online monitoring device for carbon emissions from coal-fired power plants according to claim 2, It is characterized in that include: The fuel characteristic coefficient module is used to estimate the fuel characteristic coefficient data based on empirical data of various coal qualities. The fuel characteristic coefficient module is respectively connected to CO 2 The theoretical total emission calculation module is connected with the boiler combustion carbon emission calculation module.

4. The online monitoring device for carbon emissions from coal-fired power plants according to claim 2, It is characterized in that include: A wet desulfurization calcium-sulfur ratio value-taking module is used to obtain wet desulfurization calcium-sulfur ratio value data according to the design value of the desulfurization manufacturer. The carbon emission calculation module generated during the desulfurization process is connected to the wet desulfurization calcium-sulfur ratio value-taking module.

5. A computer-readable storage medium having a computer program stored thereon, It is characterized in that When the program is executed by a processor, the method for online monitoring and calculation of carbon emissions from a coal-fired power plant as described in claim 1 is implemented.

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