Method and system for evaluating pollution reduction and carbon reduction collaboration degree of coal-fired power generation industry based on online monitoring data

Abstract

The invention discloses a method and a system for evaluating the pollution reduction and carbon reduction collaboration degree in the coal-fired power generation industry based on online monitoring data, related pollutants are typical atmospheric pollutants, and carbon emission particularly refers to carbon dioxide emission. The method comprises three parts: a subsystem for acquiring and preprocessing data of single atmospheric pollutants such as SO2, particulate matters and NOx, a subsystem for accounting the cooperation degree of single atmospheric pollutants and carbon emission reduction in the coal-fired power generation industry, and a subsystem for comprehensively accounting pollution and carbon reduction indexes in the coal-fired power generation industry. According to the method, the typical representative coal-fired power generation enterprise level data in the region is processed and integrated to evaluate the pollution reduction and carbon reduction level of the coal-fired power generation industry in the region range.

Description

Technical Field

[0001] The present invention relates to the field of environmental data analysis of the coal-fired power generation industry, and in particular to a system and method for evaluating the coordinated reduction of pollutants and carbon emissions in the coal-fired power generation industry in a region based on point data of coal-fired power generation enterprises in the region. Background Art

[0002] Adhering to the coordinated increase in efficiency of pollution reduction and carbon reduction, and promoting green and low-carbon economic and social development have become important tasks in the current environmental protection field. Energy activities are the main source of atmospheric pollutants and CO2 emissions. The combustion of fossil fuels leads to a large amount of SO2, NOx, particulate matter and CO2 emissions. Among them, the power system, as a key component of the energy system, plays an important role in global carbon dioxide emissions, and its carbon emissions account for about 40% of carbon emissions. However, due to certain obstacles in obtaining data in the power industry, it is particularly important to evaluate the level of coordinated governance of pollution reduction and carbon reduction in the power generation industry in the region through enterprise unit-level data. At present, there is still a gap in the calculation of high-frequency pollution reduction and carbon reduction index in the power generation industry. It is urgent to evaluate the current status of pollution reduction and carbon reduction in the power generation industry through power big data and high-frequency pollutant online monitoring data, and assist local governments in carrying out "pollution-carbon" coordinated emission reduction.

[0003] CN117669858A discloses a quantitative analysis method for coordinated pollution reduction and carbon reduction in coal-fired power plants, which includes: S1. Determine the types and emission sources of atmospheric pollutants and greenhouse gases of the coal-fired power plant according to the actual production situation of the coal-fired power plant; S2. Determine the emission of each atmospheric pollutant and greenhouse gas before and after the emission reduction measures are applied according to the types and emission sources of atmospheric pollutants and greenhouse gases of the coal-fired power plant; S3. Convert the emission of each atmospheric pollutant before and after the emission reduction measures into a comprehensive atmospheric pollutant emission equivalent, and convert the emission of each greenhouse gas into a carbon dioxide emission equivalent; S4. Calculate the emission reduction of each atmospheric pollutant and greenhouse gas by the emission reduction measures according to the comprehensive atmospheric pollutant emission equivalent of atmospheric pollutants before and after the emission reduction measures and the carbon dioxide emission equivalent of greenhouse gases, and calculate the synergistic effect coefficient; S5. Conduct a quantitative evaluation and analysis of coordinated pollution reduction and carbon reduction according to the emission reduction of each atmospheric pollutant and greenhouse gas and the synergistic effect coefficient.

[0004] This patent relies heavily on the accuracy and representativeness of basic data in the process of calculating the synergy between pollutants and carbon dioxide emissions in the coal-fired power generation industry. The coal-fired power generation units in the collected data area must account for at least 90% of the total installed capacity in the area to ensure the effectiveness of the calculation of this method. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method and system for evaluating the synergy of pollution reduction and carbon reduction in the coal-fired power generation industry based on online monitoring data, which solves the problem that the current coal-fired power generation industry is unable to effectively obtain industry pollutant and carbon emission data, and forms a bottom-up method for evaluating the synergy of pollution reduction and carbon reduction in the coal-fired power generation industry. Through point-by-point online monitoring data and carbon emission data at the coal-fired power generation unit level, the level of pollution reduction and carbon reduction synergy in the coal-fired power generation industry in the region is reasonably evaluated.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] The first aspect of the present invention provides a method for evaluating the synergy of pollution reduction and carbon reduction in the coal-fired power generation industry based on online monitoring data, comprising the following steps:

[0008] S1, obtain the single air pollutant data of SO2, particulate matter and NOx, perform preprocessing, and convert them into the converted data under standard conditions;

[0009] S2, calculate the synergy between single air pollutants and carbon emission reduction, use the revised online monitoring data of single air pollutants and power supply emission factors, introduce the revised coupling coordination model, calculate the synergy index between SO2, particulate matter and NOx single air pollutants and CO2 pollution reduction and carbon reduction in the coal-fired power generation industry in the region, and determine the type of synergy reduction;

[0010] S3, calculates the pollution reduction and carbon reduction index of the coal-fired power generation industry, converts the single air pollutant SO2, particulate matter and NOx and CO2 emission data into local air pollutant emission equivalents, and measures the degree and changing pattern of the synergistic effect of pollution reduction and carbon reduction in the coal-fired power generation industry.

[0011] Furthermore, S1 includes the online monitoring data concentration conversion of SO2, particulate matter and NOx single pollutants, dry flue gas flow calculation and the total amount calculation process of SO2, particulate matter and NOx pollutants;

[0012] Among them, the conversion concentration formula of particulate matter and NOx single pollutants is the same as that of SO2, and the calculation formula of SO2 conversion concentration is as follows:

[0013]

[0014] SO2Z is ​​the converted SO2 concentration, mg / m 3 ; SO2 is the measured SO2 concentration, mg / m 3 ;X H2Ois the measured water content in the flue gas, that is, the flue gas humidity, %; O2' is the measured oxygen content in the flue gas, %; α' is the measured excess air coefficient; α is the excess air coefficient, the conversion coefficient for coal-fired boilers less than or equal to 45.5MW is 1.8; the conversion coefficient for coal-fired boilers greater than 45.5MW is 1.4;

[0015] Among them, the dry flue gas flow calculation formula is as follows:

[0016]

[0017] Q sn is the dry flue gas flow rate under standard conditions, m 3 / h;Q s is the wet flue gas flow rate, m 3 / h; Ts is the measured flue gas temperature, ℃; Ba is the atmospheric pressure value, Pa; Ps is the average flue gas static pressure, Pa; X H2O is the measured moisture content in flue gas, i.e., flue gas humidity, %;

[0018] Among them, the calculation formula for the total amount of SO2, particulate matter and NOx pollutants is as follows:

[0019]

[0020] Q i,t M is the total amount of the i-th pollutant produced per unit product in the coal-fired power generation industry in the region during period t, mg / kWh; i is the amount of pollutant ith after conversion in the coal-fired power generation industry in the region, mg; P w,j,t is the average active power of the jth coal-fired generator unit in time period t, kW; T j,t is the operating time of the jth coal-fired generating unit in time period t, h; C i,j,t is the emission concentration of the ith pollutant of the jth coal-fired power generation unit in time period t, mg / m 3 ;Q sn,j,t is the flue gas flow rate of the jth coal-fired power generation unit in time period t, m 3 / h.

[0021] Furthermore, S2 includes the calculation method of the synergy degree of SO2, particulate matter and NOx single air pollutants with CO2 emission reduction and the method of judging the type of synergy emission reduction. The specific calculation process is as follows:

[0022] Standardize the single air pollutant emission data of SO2, particulate matter and NOx as well as carbon emission data. The standardization process is as follows:

[0023]

[0024] Q i,t,normis the standardized value of the emission of the i-th pollutant in period t; Q i,t is the unit product generation of the i-th pollutant in time period t, mg / kWh; E CO2,t,norm is the standardized value of the power supply emission factor in period t; E CO2,t is the power supply emission factor in time period t, mgCO2 / kWh;

[0025] Calculate the SO2, particulate matter and NOx single air pollutant emission data and carbon emission data change rate, the calculation formula is as follows:

[0026]

[0027] R p,i,t is the change rate of unit product emission of the i-th pollutant in time period t, %; R CO2,t is the rate of change of CO2 in period t, %; Q i,t,norm is the standardized value of the emission of the i-th pollutant per unit product in period t; E CO2,t,norm is the standardized value of the power supply emission factor in period t;

[0028] Calculate the synergy of pollution reduction and carbon reduction of individual pollutants and carbon dioxide, and determine the type of synergy effect as follows:

[0029]

[0030] T=aR p,i,t +bR CO2,t

[0031]

[0032] C is the coupling degree between the i-th pollutant and the CO2 system in the t period; T is the comprehensive coordination index between the i-th pollutant and the CO2 system in the t period; gov is the coupling coordination degree between the i-th pollutant and CO2 pollution reduction and carbon reduction in the t period; R p,i,t is the change rate of unit product emission of the i-th pollutant in time period t, %; R CO2 ,t is the rate of change of CO2 in period t, %;

[0033] Determine the single pollutant and the type of carbon dioxide pollution reduction and carbon reduction coordination, as shown in the table below:

[0034] Gov value range [0,0.1) [0.1,0.2) [0.2,0.3) [0.3,0.4) [0.4,0.5) Collaborative Mode Extremely uncoordinated Serious lack of coordination Moderate disharmony Mild incoordination Critical Synergy Gov value range [0.5,0.6) [0.6,0.7) [0.7,0.8) [0.8,0.9) [0.9,1] Collaborative Mode Reluctant collaboration Primary Collaboration Intermediate Collaboration Good collaboration Highly collaborative .

[0035] Furthermore, S3 includes the calculation method of local atmospheric pollutant emissions from coal-fired power generation industry and carbon dioxide reduction, the calculation method of atmospheric pollutants and carbon dioxide pollution reduction synergy index, and the synergy type judgment standard.

[0036] The specific calculation process is as follows:

[0037] Calculate the SO2, particulate matter and NOx single air pollutant emission equivalents and CO2 emission equivalents. The calculation formula is as follows:

[0038]

[0039] E LAP is the local atmospheric pollutant emission, measured in LAPeq; E GHG is greenhouse gas emissions, measured in kg CO2; E SO2 E is the total SO2 emission under standard conditions; PM E is the total amount of particulate matter emissions under standard conditions; NOx E is the total NOx emission under standard conditions; CO2 is the total amount of CO2 emissions after calculation; α i The ith local atmospheric pollutant is converted to E LAP The coefficient of j The greenhouse gas in the jth element is converted to E GHG The coefficient of

[0040] Calculate the atmospheric pollutants and carbon dioxide pollution reduction synergy index. The specific calculation formula is as follows:

[0041]

[0042] T=aR LAP,t +bR CO2,t

[0043]

[0044] C is the coupling degree between the i-th pollutant and the CO2 system in the t period; T is the comprehensive coordination index between the i-th pollutant and the CO2 system in the t period; gov is the coupling coordination degree between the i-th pollutant and CO2 pollution reduction and carbon reduction in the t period; R LAP,t is the change rate of unit product emission of local atmospheric pollutants in time period t, %; R CO2,t is the rate of change of CO2 in period t, %;

[0045] The method for determining the type of coordinated reduction of atmospheric pollutants and CO2 in the coal-fired power generation industry is as follows:

[0046] Determine the coordinated types of air pollutants and carbon dioxide reduction in the coal-fired power generation industry. The detailed classification basis is shown in the table below.

[0047] Gov value range [0,0.1) [0.1,0.2) [0.2,0.3) [0.3,0.4) [0.4,0.5) Collaborative Mode Extremely uncoordinated Serious lack of coordination Moderate disharmony Mild incoordination Critical Synergy Gov value range [0.5,0.6) [0.6,0.7) [0.7,0.8) [0.8,0.9) [0.9,1] Collaborative Mode Reluctant collaboration Primary Collaboration Intermediate Collaboration Good collaboration Highly collaborative .

[0048] The second aspect of the present invention is to provide a pollution reduction and carbon reduction index evaluation system for the coal-fired power generation industry based on online monitoring data, comprising:

[0049] SO2, particulate matter and NOx single air pollutant data acquisition and preprocessing subsystem, used to acquire SO2, particulate matter and NOx single air pollutant data and preprocess them, and convert them into converted data under standard conditions;

[0050] The subsystem for calculating the synergy between single air pollutants and carbon emission reduction in the coal-fired power generation industry is used to calculate the synergy between single air pollutants and carbon emission reduction. It uses the revised online monitoring data of single air pollutants and power supply emission factors, introduces a revised coupling coordination model, calculates the synergy index between SO2, particulate matter and NOx single air pollutants and CO2 pollution reduction in the coal-fired power generation industry in the region, and determines the type of synergy reduction.

[0051] The comprehensive accounting subsystem of the pollution reduction and carbon reduction index of the coal-fired power generation industry is used to calculate the pollution reduction and carbon reduction index of the coal-fired power generation industry, convert the SO2, particulate matter and NOx single air pollutants and CO2 emission data into comprehensive air pollutant emission equivalents, and measure the degree and changing patterns of the synergistic effect of pollution reduction and carbon reduction in the coal-fired power generation industry.

[0052] Furthermore, the SO2, particulate matter and NOx single atmospheric pollutant data acquisition and preprocessing subsystem includes a SO2, particulate matter and NOx single pollutant online monitoring data concentration conversion module, a dry flue gas flow calculation module and a total amount calculation module for various pollutants such as SO2, particulate matter and NOx.

[0053] Furthermore, the coal-fired power generation industry single air pollutant and carbon emission reduction synergy accounting subsystem includes SO2, particulate matter and NOx single air pollutant and CO2 emission reduction synergy calculation module and synergy reduction type judgment module.

[0054] Furthermore, the comprehensive calculation subsystem of the pollution reduction and carbon reduction index of the coal-fired power generation industry includes a calculation module for the local atmospheric pollutant emissions of atmospheric pollutants and carbon dioxide reduction in the coal-fired power generation industry, a calculation module for the atmospheric pollutant and carbon dioxide pollution reduction synergy index, and a synergy type judgment standard module.

[0055] The advantages and positive effects of the present invention are:

[0056] First, when it is impossible to effectively obtain industry data, this method can be used as a reference to select some representative enterprise point data. By integrating the point data as industry data, the pollution reduction and carbon reduction levels of the industry in the region can be effectively evaluated. Second, this invention can objectively evaluate the synergy level and synergy type of single atmospheric pollutants and carbon dioxide in the coal-fired power generation industry through a modified coupling coordination model. Third, by converting various types of single atmospheric pollutants into local atmospheric pollutant equivalents, the synergy effect and synergy type of atmospheric pollutants and greenhouse gases such as carbon dioxide can be comprehensively evaluated, providing a reference for local government departments to formulate coordinated strategies for pollution reduction and carbon reduction. DETAILED DESCRIPTION

[0057] The present invention is further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0058] A pollution reduction and carbon reduction index assessment system for the coal-fired power generation industry based on online monitoring data, including: a data acquisition and preprocessing subsystem for individual air pollutants such as SO2, particulate matter and NOx, a synergy calculation subsystem for individual air pollutants and carbon emission reduction in the coal-fired power generation industry, and a comprehensive calculation subsystem for the pollution reduction and carbon reduction index in the coal-fired power generation industry.

[0059] Combined with the data availability and actual situation of the coal-fired power generation industry, it is required that the power generation, pollutant emissions and carbon emissions of the selected coal-fired power generation enterprises account for at least 90% of the coal-fired power generation units in the region. Therefore, this patent assumes that the data collected comes from a representative set of coal-fired power generation enterprises in the study area, and the research results can fully reflect the overall trend of the coal-fired power generation industry in the region.

[0060] The data acquisition and preprocessing subsystem for individual air pollutants such as SO2, particulate matter and NOx is used to acquire and preprocess air pollutant data in the coal-fired power generation industry. Combined with the hourly data read in the online monitoring system, it is converted into standard conditions (STP, usually referring to the case of temperature of 0℃ (273.15k) and pressure of 101.325kPa) through subsystem preprocessing, unifying the monitoring data collected by different coal-fired units to facilitate the calculation of the total amount of pollutant emissions.

[0061] The subsystem for calculating the synergy between single air pollutants and carbon emission reduction adopts the revised online monitoring data of single air pollutants and power supply emission factors, introduces a revised coupling coordination model, calculates the synergy index between single air pollutants such as SO2, particulate matter and NOx and CO2 pollution reduction in the coal-fired power generation industry in the region, and determines the type of synergistic emission reduction.

[0062] The coal-fired power generation industry pollution reduction and carbon reduction index calculation subsystem, which is based on the environmental protection tax law, converts single air pollutants such as SO2, particulate matter and NOx and CO2 emission data into comprehensive air pollutant emission equivalents, and studies the dynamic coupling relationship between the two, which is interrelated, interactive and mutually influential. The pollution reduction and carbon reduction index described in this system can be used to measure the degree and changing rules of the synergistic effect of pollution reduction and carbon reduction in the coal-fired power generation industry.

[0063] The data acquisition and pre-processing subsystem for individual atmospheric pollutants such as SO2, particulate matter and NOx includes the online monitoring data concentration conversion of individual pollutants such as SO2, particulate matter and NOx, dry flue gas flow calculation, and the total amount calculation process of various pollutants such as SO2, particulate matter and NOx.

[0064] Based on the online monitoring equipment of the coal-fired power generation industry, the online monitoring data of the original flue gas of each unit of the power generation facility is obtained (hourly level). The types of pollutants include particulate matter, SO2, and NOx. The data content includes the measured concentrations of various pollutants (mg / m 3 ), measured flue gas flow (m 3 / h), measured O2 content (%), flue gas temperature (℃), flue gas humidity (%), real-time atmospheric pressure (Pa) and average flue gas static pressure (Pa).

[0065] Calculation module one, based on the above-mentioned acquired data, calculates the converted concentrations of individual atmospheric pollutants such as SO2, particulate matter and NOx, which are used to unify the emission data accounting standards of various coal-fired power generation enterprises, so as to facilitate the calculation of the total emissions of the industry in the region. The introduction of converted concentrations can standardize the emission values ​​of pollutants and make the values ​​comparable. The converted concentration is obtained by converting the measured concentration with the benchmark oxygen content concentration. In the actual combustion process, in order to make the combustion complete, excess air is generally added to assist combustion. The excess air will "dilute" the gaseous pollutants actually generated by the boiler, reducing the emission concentration. Therefore, using the converted value as the evaluation criterion can ensure that the emission concentration does not change the actual concentration value due to changes in the excess air value or the perceived dilution.

[0066] The calculation formula for the converted concentration of SO2, particulate matter, and NOx (taking SO2 as an example) is as follows: "Emission Standards for Air Pollutants from Thermal Power Plants"

[0067]

[0068] SO2Z is ​​the converted SO2 concentration, mg / m 3 ;

[0069] SO2 is the measured SO2 concentration, mg / m 3

[0070] X H2Ois the measured moisture content in flue gas, i.e., flue gas humidity, %;

[0071] O2' is the measured oxygen content in the flue gas, %;

[0072] α' is the measured excess air coefficient;

[0073] α is the excess air coefficient. The conversion coefficient for coal-fired boilers less than or equal to 45.5MW is 1.8; the conversion coefficient for coal-fired boilers greater than 45.5MW is 1.4.

[0074] Calculation module 2: Due to the different operating conditions of various generator sets in the industry, there are certain differences in the flue gas temperature, pressure value, oxygen content and moisture content of each unit. The calculation of flue gas flow rate needs to be standardized according to the unified requirements and standards of the local ecological environment regulatory department, and uniformly adjusted to the standard condition for calculation. The conversion formula is as follows:

[0075]

[0076] Q sn is the dry flue gas flow rate under standard conditions, m 3 / h;

[0077] Q s is the wet flue gas flow rate, m 3 / h;

[0078] Ts is the measured flue gas temperature, °C;

[0079] Ba is the atmospheric pressure value, Pa;

[0080] Ps is the average static pressure of flue gas, Pa;

[0081] X H2O is the measured moisture content in flue gas, i.e., flue gas humidity, %;

[0082] Calculation module three is used to calculate the total amount of pollutant emissions generated by each coal-fired power generation unit and the total amount of pollutant emissions from the coal-fired power generation industry in the region. The calculation formula is as follows:

[0083]

[0084] Q i,t is the total amount of the i-th pollutant produced per unit product in the coal-fired power generation industry in the region during period t, mg / kWh;

[0085] M i is the amount of pollutant ith after conversion in the coal-fired power generation industry in the region, mg;

[0086] P w,j,t is the average active power of the jth coal-fired generating unit in time period t, kW;

[0087] T j,t is the operating time of the jth coal-fired generating unit in time period t, h;

[0088] C i,j,t is the emission concentration of the ith pollutant of the jth coal-fired power generation unit in time period t, mg / m 3 ;

[0089] Q sn,j,t is the flue gas flow rate of the jth coal-fired power generation unit in time period t, m 3 / h

[0090] The subsystem for calculating the synergy between single air pollutants and carbon emission reduction includes the calculation method of the synergy between single air pollutants such as SO2, particulate matter and NOx and CO2 emission reduction and the method for determining the type of synergy reduction. The specific calculation process is as follows:

[0091] Calculation module 1: Standardize the emission data of individual air pollutants such as SO2, particulate matter and NOx, as well as carbon emission data. The standardization process is as follows:

[0092]

[0093] Q i,t,norm is the standardized value of the emission of the i-th pollutant in period t;

[0094] Q i,t is the unit product generation of the i-th pollutant in time period t, mg / kWh;

[0095] E CO2,t,norm is the standardized value of the power supply emission factor in period t;

[0096] E CO2,t is the power supply emission factor in time period t, mgCO2 / kWh;

[0097] Calculation module 2: SO2, particulate matter, NOx and other single air pollutant emission data and carbon emission data change rate. The calculation formula is as follows:

[0098]

[0099]

[0100] R p,i,t is the change rate of unit product emission of the i-th pollutant in time period t, %;

[0101] R CO2,t is the rate of change of CO2 in period t, %;

[0102] Qi,t,norm is the standardized value of the emission of the i-th pollutant per unit product in time period t;

[0103] E CO2,t,norm is the standardized value of the power supply emission factor in period t;

[0104] Calculation module three: Calculate the synergy of pollution reduction and carbon dioxide reduction for individual pollutants and determine the type of synergy effect. The method is as follows:

[0105]

[0106] T=aR p,i,t +bR CO2,t

[0107]

[0108] C is the coupling degree between the i-th pollutant and CO2 systems in period t;

[0109] T is the comprehensive coordination index of the two systems of the i-th pollutant and CO2 in the period t;

[0110] gov is the coupling coordination degree between the i-th pollutant and CO2 pollution reduction and carbon reduction in period t;

[0111] R p,i,t is the change rate of unit product emission of the i-th pollutant in time period t, %;

[0112] R CO2,t is the rate of change of CO2 in period t, %;

[0113] Judgment module four: Determine the synergy type of pollution reduction and carbon dioxide reduction for individual pollutants. There are nine types of synergy modes in total, namely, extreme incoordination, severe incoordination, moderate incoordination, mild incoordination, critical synergy, reluctant synergy, primary synergy, intermediate synergy, good synergy and high synergy. The detailed classification basis is shown in the table below.

[0114] Table 1 Single pollutant and carbon dioxide pollution reduction and carbon reduction synergy types

[0115] Interval [0,0.1) [0.1,0.2) [0.2,0.3) [0.3,0.4) [0.4,0.5) Collaborative Mode Extremely uncoordinated Serious lack of coordination Moderate disharmony Mild incoordination Critical Synergy Interval [0.5,0.6) [0.6,0.7) [0.7,0.8) [0.8,0.9) [0.9,1] Collaborative Mode Reluctant collaboration Primary Collaboration Intermediate Collaboration Good collaboration Highly collaborative

[0116] The coal-fired power generation industry pollution reduction and carbon reduction index calculation subsystem includes the coal-fired power generation industry atmospheric pollutants and carbon dioxide minus local atmospheric pollutants (LAP, measured in LAPeq) emission calculation method, atmospheric pollutants and carbon dioxide pollution reduction synergy index calculation method and synergy type judgment standard. The specific calculation process is as follows:

[0117] Calculation module 1: Calculate the emission equivalents of individual air pollutants such as SO2, particulate matter and NOx, as well as CO2 emission equivalents. Combined with the Environmental Protection Tax Law of the People's Republic of China and relevant domestic research, various air pollutants and greenhouse gases (GHG emissions) are converted into local air pollutant (LAP, in LAPeq) emissions. The calculation formula is as follows:

[0118]

[0119] E LAP is the local air pollutant emission, measured in LAPeq;

[0120] E GHG is the greenhouse gas emissions, in kg CO2;

[0121] E SO2 is the total amount of SO2 emissions under standard conditions;

[0122] E PM is the total amount of particulate matter emissions under standard conditions;

[0123] E NOx is the total NOx emission under standard conditions;

[0124] E CO2 is the total amount of CO2 emissions after calculation;

[0125] α i The ith local atmospheric pollutant is converted to E LAP The coefficient of

[0126] β j The greenhouse gas in the jth element is converted to E GHG The coefficient of

[0127] Calculation module 2: Calculate the synergy index of atmospheric pollutants and carbon dioxide pollution reduction. The specific calculation formula is as follows:

[0128]

[0129] T=aR LAP,t +bR CO2,t

[0130]

[0131] C is the coupling degree between the i-th pollutant and CO2 systems in period t;

[0132] T is the comprehensive coordination index of the two systems of the i-th pollutant and CO2 in the period t;

[0133] gov is the coupling coordination degree between the i-th pollutant and CO2 pollution reduction and carbon reduction in period t;

[0134] R LAP,t is the rate of change of unit product emission of local atmospheric pollutants in period t, %;

[0135] R CO2,t is the rate of change of CO2 in period t, %;

[0136] Calculation module three: Determine the type of coordinated reduction of atmospheric pollutants and carbon dioxide in the coal-fired power generation industry. The determination method is as follows:

[0137] The types of synergy between atmospheric pollutants and carbon dioxide reduction in the coal-fired power generation industry are determined, which are divided into nine types of synergy modes: extreme incoordination, severe incoordination, moderate incoordination, mild incoordination, critical synergy, marginal synergy, primary synergy, intermediate synergy, good synergy and high synergy. The detailed classification basis is shown in the table below.

[0138] Table 2 Types of coordinated reduction of atmospheric pollutants and carbon dioxide emissions in the coal-fired power generation industry

[0139] Interval [0,0.1) [0.1,0.2) [0.2,0.3) [0.3,0.4) [0.4,0.5) Collaborative Mode Extremely uncoordinated Serious lack of coordination Moderate disharmony Mild incoordination Critical Synergy Interval [0.5,0.6) [0.6,0.7) [0.7,0.8) [0.8,0.9) [0.9,1] Collaborative Mode Reluctant collaboration Primary Collaboration Intermediate Collaboration Good collaboration Highly collaborative

[0140] The purpose of introducing converted concentrations in environmental atmospheric pollution source monitoring is to standardize the emission values ​​of pollutants and make the values ​​comparable. The converted concentration is obtained by converting the measured concentration with the benchmark oxygen content concentration. In the actual combustion process, in order to make the combustion complete, excess air is generally added to assist combustion. The excess air will "dilute" the gaseous pollutants actually produced by the boiler, reducing the emission concentration. Therefore, using the converted value as the evaluation standard can ensure that the emission concentration does not change the actual concentration value due to changes in the excess air value or perceived dilution. The combustion process oxygen requirements of different industries are different, so the formulation of the industry benchmark oxygen content is usually based on a comprehensive consideration of the emission concentration when the fuel is just fully burned and whether the combustion process of the industry meets the current emission reduction technology level of the industry.

[0141] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept, which all belong to the protection scope of the present invention.

Claims

1. A method for evaluating the synergy of pollution reduction and carbon reduction in the coal-fired power generation industry based on online monitoring data, characterized in that: The steps include: S1, obtain the single air pollutant data of SO2, particulate matter and NOx, perform preprocessing, and convert them into the converted data under standard conditions; S2, calculate the synergy between single air pollutants and carbon emission reduction, use the revised online monitoring data of single air pollutants and power supply emission factors, introduce the revised coupling coordination model, calculate the synergy index between SO2, particulate matter and NOx single air pollutants and CO2 pollution reduction and carbon reduction in the coal-fired power generation industry in the region, and determine the type of synergy reduction; S3, calculates the pollution reduction and carbon reduction index of the coal-fired power generation industry, converts the single air pollutant SO2, particulate matter and NOx and CO2 emission data into local air pollutant emission equivalents, and measures the degree and changing pattern of the synergistic effect of pollution reduction and carbon reduction in the coal-fired power generation industry.

2. The method for evaluating the synergy of pollution reduction and carbon reduction in the coal-fired power generation industry based on online monitoring data according to claim 1 is characterized in that: S1 includes the online monitoring data concentration conversion of SO2, particulate matter and NOx single pollutants, dry flue gas flow calculation and the total amount calculation process of SO2, particulate matter and NOx pollutants; Among them, the conversion concentration formula of particulate matter and NOx single pollutants is the same as that of SO2, and the calculation formula of SO2 conversion concentration is as follows: SO2Z is ​​the converted SO2 concentration, mg / m 3 ; SO2 is the measured SO2 concentration, mg / m 3 ;X H2O is the measured water content in the flue gas, that is, the flue gas humidity, %; O2' is the measured oxygen content in the flue gas, %; α' is the measured excess air coefficient; α is the excess air coefficient, the conversion coefficient for coal-fired boilers less than or equal to 45.5MW is 1.8; the conversion coefficient for coal-fired boilers greater than 45.5MW is 1.4; Among them, the dry flue gas flow calculation formula is as follows: Q sn is the dry flue gas flow rate under standard conditions, m 3 / h;Q s is the wet flue gas flow rate, m 3 / h; Ts is the measured flue gas temperature, ℃; Ba is the atmospheric pressure value, Pa; Ps is the average flue gas static pressure, Pa; X H2O is the measured moisture content in flue gas, i.e., flue gas humidity, %; Among them, the calculation formula for the total amount of SO2, particulate matter and NOx pollutants is as follows: Q i,t M is the total amount of the i-th pollutant produced per unit product in the coal-fired power generation industry in the region during period t, mg / kWh; i is the amount of pollutant ith after conversion in the coal-fired power generation industry in the region, mg; P w,j,t is the average active power of the jth coal-fired generator unit in time period t, kW; T j,t is the operating time of the jth coal-fired generating unit in time period t, h; C i,j,t is the emission concentration of the ith pollutant of the jth coal-fired generating unit in time period t, mg / m 3 ;Q sn,j,t is the flue gas flow rate of the jth coal-fired power generation unit in time period t, m 3 / h.

3. The method for evaluating the synergy of pollution reduction and carbon reduction in the coal-fired power generation industry based on online monitoring data according to claim 1 is characterized in that: S2 includes the calculation method of the synergy between SO2, particulate matter and NOx single air pollutants and CO2 emission reduction and the method of determining the type of synergy emission reduction. The specific calculation process is as follows: Standardize the single air pollutant emission data of SO2, particulate matter and NOx as well as carbon emission data. The standardization process is as follows: Q i,t,norm is the standardized value of the emission of the i-th pollutant in period t; Q i,t is the unit product generation of the i-th pollutant in time period t, mg / kWh; E CO2,t,norm is the standardized value of the power supply emission factor in period t; E CO2,t is the power supply emission factor in time period t, mgCO2 / kWh; Calculate the SO2, particulate matter and NOx single air pollutant emission data and carbon emission data change rate, the calculation formula is as follows: R p,i,t is the change rate of unit product emission of the i-th pollutant in time period t, %; R CO2,t is the rate of change of CO2 in period t, %; Q i,t,norm is the standardized value of the emission of the i-th pollutant per unit product in period t; E CO2,t,norm is the standardized value of the power supply emission factor in period t; Calculate the synergy of pollution reduction and carbon reduction of individual pollutants and carbon dioxide, and determine the type of synergy effect as follows: T=aR p,i,t +bR CO2,t C is the coupling degree between the i-th pollutant and the CO2 system in the t period; T is the comprehensive coordination index between the i-th pollutant and the CO2 system in the t period; gov is the coupling coordination degree between the i-th pollutant and CO2 pollution reduction and carbon reduction in the t period; R p,i,t is the change rate of unit product emission of the i-th pollutant in time period t, %; R CO2,t is the rate of change of CO2 in period t, %; Determine the single pollutant and the type of carbon dioxide pollution reduction and carbon reduction coordination, as shown in the table below: 。 4. The method for evaluating the synergy of pollution reduction and carbon reduction in the coal-fired power generation industry based on online monitoring data according to claim 1 is characterized in that: S3 includes the calculation method of local atmospheric pollutant emissions from coal-fired power generation industry for atmospheric pollutants and carbon dioxide reduction, the calculation method of atmospheric pollutants and carbon dioxide pollution reduction synergy index, and the synergy type judgment standard. The specific calculation process is as follows: Calculate the SO2, particulate matter and NOx single air pollutant emission equivalents and CO2 emission equivalents. The calculation formula is as follows: E LAP is the local atmospheric pollutant emission, measured in LAPeq; E GHG is greenhouse gas emissions, measured in kg CO2; E SO2 E is the total SO2 emission under standard conditions; PM E is the total amount of particulate matter emissions under standard conditions; NOx E is the total NOx emission under standard conditions; CO2 is the total amount of CO2 emissions after calculation; α i The ith local atmospheric pollutant is converted to E LAP The coefficient of j The greenhouse gas in the jth element is converted to E GHG The coefficient of Calculate the atmospheric pollutants and carbon dioxide pollution reduction synergy index. The specific calculation formula is as follows: T=aR LAP,t +bR CO2,t C is the coupling degree between the i-th pollutant and the CO2 system in the t period; T is the comprehensive coordination index between the i-th pollutant and the CO2 system in the t period; gov is the coupling coordination degree between the i-th pollutant and CO2 pollution reduction and carbon reduction in the t period; R LAP,t is the change rate of unit product emission of local atmospheric pollutants in time period t, %; R CO2,t is the rate of change of CO2 in period t, %; The method for determining the type of coordinated reduction of atmospheric pollutants and CO2 in the coal-fired power generation industry is as follows: Determine the coordinated types of air pollutants and carbon dioxide reduction in the coal-fired power generation industry. The detailed classification basis is shown in the table below. 。 5. A pollution reduction and carbon reduction index assessment system for the coal-fired power generation industry based on online monitoring data, comprising: SO2, particulate matter and NOx single air pollutant data acquisition and preprocessing subsystem, used to acquire SO2, particulate matter and NOx single air pollutant data and preprocess them, and convert them into converted data under standard conditions; The subsystem for calculating the synergy between single air pollutants and carbon emission reduction in the coal-fired power generation industry is used to calculate the synergy between single air pollutants and carbon emission reduction. It uses the revised online monitoring data of single air pollutants and power supply emission factors, introduces a revised coupling coordination model, calculates the synergy index between SO2, particulate matter and NOx single air pollutants and CO2 pollution reduction in the coal-fired power generation industry in the region, and determines the type of synergy reduction. The comprehensive accounting subsystem of the pollution reduction and carbon reduction index of the coal-fired power generation industry is used to calculate the pollution reduction and carbon reduction index of the coal-fired power generation industry, convert the SO2, particulate matter and NOx single air pollutants and CO2 emission data into comprehensive air pollutant emission equivalents, and measure the degree and changing patterns of the synergistic effect of pollution reduction and carbon reduction in the coal-fired power generation industry.

6. The pollution reduction and carbon reduction index evaluation system for coal-fired power generation industry based on online monitoring data according to claim 5 is characterized in that: The SO2, particulate matter and NOx single air pollutant data acquisition and preprocessing subsystem includes a SO2, particulate matter and NOx single pollutant online monitoring data concentration conversion module, a dry flue gas flow calculation module and a total amount calculation module for various pollutants such as SO2, particulate matter and NOx.

7. The pollution reduction and carbon reduction index evaluation system for coal-fired power generation industry based on online monitoring data according to claim 5 is characterized in that: The subsystem for calculating the synergy between single air pollutants and carbon emission reduction in the coal-fired power generation industry includes a module for calculating the synergy between single air pollutants such as SO2, particulate matter and NOx and CO2 emission reduction and a module for determining the type of synergy between the two.

8. The pollution reduction and carbon reduction index evaluation system for coal-fired power generation industry based on online monitoring data according to claim 5 is characterized in that: The coal-fired power generation industry pollution reduction and carbon reduction index comprehensive accounting subsystem includes a coal-fired power generation industry atmospheric pollutant and carbon dioxide reduction conversion local atmospheric pollutant emission calculation module, an atmospheric pollutant and carbon dioxide pollution reduction synergy index calculation module and a synergy type judgment standard module.

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