High-energy-consumption enterprise carbon emission refined accounting method

Abstract

The invention discloses a carbon emission refined accounting method for a high-energy-consumption enterprise, and belongs to the technical field of energy conservation and carbon reduction in the high-energy-consumption industry. According to the method, the condition of fugitive emission of smoke in the production process of a high-energy-consumption enterprise is fully considered, and accurate quantification of fugitive carbon emission generated by fuel combustion and fugitive carbon emission generated by using a carbon-containing raw material is realized by adopting an actual measurement method and an emission factor method respectively; and meanwhile, the actual measurement method and the emission factor method are combined to check the emission through the exhaust funnel and the indirect carbon emission, so that the problems of low data accuracy, poor adaptability and the like when the actual measurement method is used for carrying out carbon emission check on high-energy-consumption enterprises are solved, the accuracy of carbon emission check data is effectively improved, and the economic benefit is improved. According to the invention, refined accounting of carbon emission of the high-energy-consumption enterprise and accurate quantification of carbon emission are realized, accurate carbon emission data are provided for the high-energy-consumption enterprise to implement carbon emission management and participate in carbon market transaction, and guidance is provided for the high-energy-consumption enterprise to carry out energy-saving and carbon-reducing work.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy conservation and carbon reduction in high-energy-consuming industries, and specifically relates to a method for fine-grained carbon emission accounting for high-energy-consuming enterprises. Background Art

[0002] High-energy-consuming enterprises such as steel, nonferrous metals, and building materials are the key to controlling carbon emissions in the industrial sector. High-energy-consuming enterprises should combine their own carbon emission characteristics, strengthen carbon emission accounting work and formulate corresponding carbon reduction measures.

[0003] At present, high-energy-consuming enterprises use three methods to calculate carbon emissions: carbon emission factor method, material balance method (mass balance method) and actual measurement method. The calculation process of carbon emission factor method is relatively simple, but the carbon dioxide emission factors of various fuels widely used at present are poorly adaptable to high-energy-consuming enterprises. It is often necessary to re-determine the carbon dioxide emission factors according to the actual energy consumption of the enterprise, and it is necessary to collect the consumption data of solid, gaseous and liquid fuels at regular intervals and test the carbon content of fossil fuels. The test results need to be approved by CMA or CNAS. The amount of collected data is large and there are large errors in the calculation process. The material balance method is based on the law of conservation of mass and has strong scientificity and implementation effectiveness, but it requires a comprehensive understanding of the production process of high-energy-consuming enterprises, the collection of detailed industrial production process data and the on-site data collection. It also requires that all data be accurate and reliable. The calculation process of this method is relatively complex and cumbersome. The actual measurement method obtains carbon emissions based on the actual measured data of emission sources, with fewer intermediate links, but the actual measurement method is not sophisticated enough in the accounting process and does not consider the carbon emissions in the intermediate links of the production process. There are many unorganized carbon emission sources in the sintering, pelletizing, coking, ironmaking, steelmaking and rolling processes in the production of steel enterprises, and they are characterized by strong paroxysmal, small single sources and large total amounts. High-energy-consuming enterprises represented by steel, nonferrous metals, and building materials have unorganized flue gas emissions in the middle links of the production process. The lack of accounting methods for unorganized carbon emissions from high-energy-consuming enterprises has resulted in low accuracy of carbon emission accounting data based on the actual measurement method, and the actual measurement method has poor adaptability to carbon emission accounting for high-energy-consuming enterprises. Therefore, for high-energy-consuming enterprises such as steel, nonferrous metals, and building materials, how to achieve refined accounting of carbon emissions and accurate quantification of carbon emissions is an issue that urgently needs to be improved in existing technologies. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a method for fine-grained accounting of carbon emissions of high-energy-consuming enterprises.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A refined accounting method for carbon emissions of high energy-consuming enterprises, comprising the following steps:

[0007] (1) Collect data on direct carbon emission sources, first unorganized carbon emission sources, second unorganized carbon emission sources, and indirect carbon emission sources in the production process of high-energy-consuming enterprises; the first unorganized carbon emission source is the CO2 directly emitted in the form of unorganized emissions from the consumption of flux, carbon-containing chemicals, and purchased carbon-containing raw materials in the production process of high-energy-consuming enterprises. 2 The second unorganized carbon emission source is the CO emitted by the unorganized flue gas emission sources of high energy-consuming enterprises. 2；

[0008] (2) Calculate the carbon emissions E from direct carbon emission sources using the actual measurement method 排气筒 ;

[0009] (3) Calculate the carbon emissions E of the first unorganized carbon emission source using the emission factor method 无组织节点 ;

[0010] (4) Calculate the carbon emissions E of the second unorganized carbon emission source using the actual measurement method 无组织源 ;

[0011] (5) Calculate the carbon emissions E from indirect carbon emission sources using the emission factor method 间接源 ;

[0012] (6) According to steps (2)-(5), the total carbon emissions of high energy-consuming enterprises are obtained: 总 =E 排气筒 +E 无组织源 +E 间接源 .

[0013] As a preferred embodiment of the present invention, the direct carbon emission sources include the CO generated by the consumption of flux, carbon-containing chemicals and purchased carbon-containing raw materials in the production process of high-energy-consuming enterprises. 2 CO produced by burning fossil fuels 2 Mixed with CO emitted through exhaust pipes 2 .

[0014] The flux includes limestone, dolomite, etc.; the carbon-containing chemical agents include soda ash, oxalic acid, etc.; the purchased carbon-containing raw materials include electrodes, pig iron, scrap steel, etc.

[0015] As a preferred embodiment of the present invention, the second unorganized carbon emission source is CO generated by the unorganized flue gas emission source of high energy consumption enterprises. 2 emission.

[0016] The unorganized emission sources of high-energy-consuming enterprises mainly include unorganized emissions involving particulate matter and unorganized emissions of flue gas. Carbon dioxide only exists in the unorganized emissions of flue gas.

[0017] As a preferred embodiment of the present invention, the indirect carbon emission source is the net purchase of CO generated by electricity and heat by high energy-consuming enterprises. 2 emission.

[0018] As a preferred embodiment of the present invention, in step (2), the carbon emission amount E of the direct carbon emission source is 排气筒 The calculation specifically includes the following steps:

[0019] S2-1: A continuous flue gas emission monitoring system (CEMS) is installed on each exhaust pipe in the production process of high energy-consuming enterprises to collect CO 2 Real-time emission wet-based volume concentration of gas C s , average flow rate of wet flue gas in section Flue gas temperature t s , Flue gas static pressure P s and flue gas moisture content X sw ;

[0020] S2-2: Calculate the CO of the kth exhaust pipe under standard conditions based on the data collected in step S2-1 2 Dry basis mass concentration C dk for:

[0021]

[0022] Among them, C dk is the CO of the kth exhaust pipe under standard conditions 2 Dry basis mass concentration, unit: g / m 3 ; C sk is the CO of the kth exhaust pipe 2 Wet basis volume concentration, unit: volume percentage, %; X swk is the humidity content of the smoke from the kth exhaust pipe, in %;

[0023] S2-3: Calculate the dry flue gas volume flow Q of the kth exhaust pipe under standard conditions according to the data collected in step S2-1 snk for:

[0024]

[0025] Among them, A k The area of ​​the cross section of the kth exhaust pipe, in m 2 ; K V is the velocity field coefficient; is the average velocity of wet flue gas at the measured section of the kth exhaust chimney, in m / s; t sk is the flue gas temperature of the kth exhaust pipe, in degrees Celsius; P atm is atmospheric pressure, unit: Pa; P skis the flue gas static pressure (gauge pressure) of the kth exhaust pipe, in Pa;

[0026] S2-4: Based on formulas (1) and (2), the carbon emissions of all exhaust pipes of high-energy-consuming enterprises are obtained: 排气筒 :

[0027]

[0028] l is the total number of exhaust pipes.

[0029] As a preferred embodiment of the present invention, in step (3), the carbon emission amount E of the first unorganized carbon emission source is 无组织节点 The calculation specifically includes:

[0030] S3-1: The number of unorganized carbon emission nodes involving flux, carbon-containing chemicals and purchased carbon-containing raw materials in the production process of high-energy-consuming enterprises is marked as s, where the tth unorganized carbon emission node t = 1, 2, ..., s;

[0031] S3-2: Unorganized carbon emissions E of flux, carbon-containing chemicals and purchased carbon-containing raw materials at the tth unorganized carbon emission node 无组织节点t :

[0032] E 无组织节点t =M CDt ×E CDt (5);

[0033] Among them, M CDt E is the usage of flux, carbon-containing chemicals and purchased carbon-containing raw materials, unit: t; CDt is the carbon emission coefficient corresponding to flux, carbon-containing chemicals and purchased carbon-containing raw materials, unit: kg (CO 2 ) / t (flux, carbon-containing chemicals and purchased carbon-containing raw materials); E 无组织节点t is the unorganized carbon emissions of flux, carbon-containing chemicals and purchased carbon-containing raw materials at the tth unorganized carbon emission node, in kg;

[0034] S3-3: Therefore, the total amount of unorganized carbon emissions from the use of flux, carbon-containing chemicals and purchased carbon-containing raw materials at all nodes of high-energy-consuming enterprises is E 无组织节点 for:

[0035]

[0036] As a preferred embodiment of the present invention, in step (4), the carbon emission amount E of the second unorganized carbon emission source is 无组织源 The accounting includes:

[0037] S4-1: The number of production processes of high-energy-consuming enterprises involving unorganized carbon emission sources generated by fossil fuel combustion is recorded as m, where the i-th production process i=1, 2, ..., m; the number of unorganized carbon emission sources in each production process is recorded as n, then the j-th unorganized emission source in a certain production process j=1, 2, ..., n;

[0038] S4-2: The carbon emissions of the jth unorganized emission source in the production process i of a high-energy-consuming enterprise are recorded as E ij , then the total carbon emissions of the second unorganized carbon emission source of high energy-consuming enterprises is E 无组织源 for:

[0039]

[0040] As a preferred embodiment of the present invention, the carbon emission E of the jth unorganized emission source in the production process i of the high energy consumption enterprise is ij for:

[0041]

[0042] Among them, K ij C(x) is the correction coefficient of the jth fugitive emission source in the production process i of a high energy-consuming enterprise; ij is the CO2 emission of the jth unorganized emission source in the production process i of the high-energy-consuming enterprise, at a distance of x meters from the emission source along the downwind ground axis. 2 Ground concentration, unit: mg / m 3 ; is the jth unorganized emission source CO in production process i of a high energy-consuming enterprise 2 Environmental background value of concentration, unit: mg / m 3 ; is the average wind speed around the jth unorganized emission source in the production process i of the high-energy-consuming enterprise, in m / s; σ yij is the horizontal diffusion coefficient of flue gas in the horizontal direction perpendicular to the downwind direction at a distance of x meters from the jth unorganized emission source in the production process i of the high-energy-consuming enterprise, in m; σ zij H is the vertical diffusion coefficient of smoke in the vertical direction perpendicular to the downwind direction at a distance of x meters from the jth unorganized emission source in the production process i of the high-energy-consuming enterprise, in m; ij It is the effective emission height of flue gas from the jth unorganized emission source in production process i of high-energy-consuming enterprise, in meters.

[0043] As a preferred embodiment of the present invention, in step (5), the carbon emission amount E of the indirect carbon emission source is 间接源 for:

[0044] E 间接源 =EE e×E e +EH h ×E h (10);

[0045] Among them, E 间接源 Indirect carbon emission sources, that is, carbon dioxide emissions generated by net purchased electricity and heat, unit: kgCO 2 ;EE e The net amount of electricity purchased is in MW·h; EH h Net purchased heat, unit: GJ; E e is the grid emission factor, unit: kgCO 2 / MW·h; E h is the thermal emission factor, unit: kgCO 2 / GJ.

[0046] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention fully considers the situation of unorganized flue gas emissions in the production process of high-energy-consuming enterprises, and adopts the actual measurement method and the emission factor method to realize the accurate quantification of the unorganized carbon emissions generated by fuel combustion and the unorganized carbon emissions generated by the use of carbon-containing raw materials, respectively. At the same time, the actual measurement method and the emission factor method are combined to calculate the emissions through the exhaust pipe and the indirect carbon emissions, which solves the problems of low data accuracy and poor adaptability in the actual measurement method for carbon emission accounting of high-energy-consuming enterprises, effectively improves the accuracy of carbon emission accounting data, realizes the refined accounting of carbon emissions of high-energy-consuming enterprises and the accurate quantification of carbon emissions, provides accurate carbon emission data for high-energy-consuming enterprises to implement carbon emission management and participate in carbon market transactions, and provides guidance for high-energy-consuming enterprises to carry out energy conservation and carbon reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a flow chart of the refined accounting method for carbon emissions of high-energy-consuming enterprises. DETAILED DESCRIPTION

[0048] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0049] Example 1

[0050] like Figure 1 A refined accounting method for carbon emissions of high-energy-consuming enterprises includes the following steps:

[0051] (1) Based on the production process of high-energy-consuming enterprises, the production links within the carbon emission accounting boundary and the CO generated by each process in the production process are sorted out. 2The flow and carbon emission areas of energy-intensive enterprises are analyzed, and the direct carbon emission sources, unorganized carbon emission sources and indirect carbon emission sources in the carbon emission areas are identified, and their carbon emission characteristics are analyzed to establish a list of direct carbon emission sources, unorganized carbon emission sources and indirect carbon emission sources. Among them, direct carbon emission sources include the CO2 generated by the consumption of limestone, dolomite and other fluxes, soda ash, oxalic acid and other carbon-containing chemicals in the production process of high-energy-consuming enterprises, as well as electrodes, pig iron, scrap steel and other purchased carbon-containing raw materials. 2 CO produced by burning fossil fuels 2 Mixed with CO emitted through exhaust pipes 2 . Specifically: Carbon emissions generated in the metal smelting process by limestone, dolomite, carbon-containing chemicals, electrodes, pig iron, scrap steel and other carbon-containing raw materials added to smelting furnaces, converters and other smelting equipment by high-energy-consuming enterprises such as steel and nonferrous metals are mixed with carbon dioxide generated by the combustion of fossil fuels and discharged centrally through exhaust pipes. The number of exhaust pipes in all production processes of high-energy-consuming enterprises is marked as l, where the kth exhaust pipe k = 1, 2, ..., l. The first unorganized carbon emission source is the CO2 directly emitted in the form of unorganized emissions from the consumption of flux, carbon-containing chemicals and purchased carbon-containing raw materials in the production process of high-energy-consuming enterprises. 2 , which belongs to unorganized node carbon emissions. The second unorganized carbon emission source is the CO generated by the unorganized flue gas emission sources of high energy-consuming enterprises. 2 Indirect carbon emission sources are CO2 generated by the net purchase of electricity and heat by high energy-consuming enterprises. 2 emission.

[0052] (2) Calculate the carbon emissions E from direct carbon emission sources using the actual measurement method 排气筒 : A continuous flue gas emission monitoring system CEMS is installed on each exhaust pipe in the production process of high-energy-consuming enterprises. The system consists of an infrared greenhouse gas concentration online monitoring subsystem, a flue gas parameter monitoring subsystem, and a data acquisition and processing subsystem. The infrared greenhouse gas concentration online monitoring subsystem is used to monitor CO 2 Real-time emission wet-based volume concentration of gas C s , and used for CO under standard conditions 2 Dry basis mass concentration C d The smoke parameter monitoring subsystem is used to measure the average flow rate of wet smoke in the cross section. Flue gas temperature t s , Flue gas static pressure (gauge pressure) P s and flue gas moisture content X sw , and is used for the dry flue gas volume flow Q under standard conditions sn Calculation.

[0053] CO from the kth exhaust pipe of a high energy-consuming enterprise 2 Real-time gas emission wet basis volume concentration C sk , average flow rate of wet flue gas Flue gas temperature t sk , Flue gas static pressure P sk and flue gas moisture content X swk The monitoring data are transmitted from the data collector to the data processing system through the communication system, and the CO 2 Dry basis mass concentration C dk , dry flue gas volume flow rate Q snk and hourly carbon emissions F 排气筒k .

[0054] The details are as follows:

[0055] S2-1: CO of the kth exhaust pipe under standard conditions 2 Dry basis mass concentration:

[0056]

[0057] Where: C dk : CO of the kth exhaust pipe under standard conditions 2 Dry basis mass concentration, unit: g / m 3 ; C sk : CO of the kth exhaust pipe measured by CEMS 2 Wet basis volume concentration, unit: volume percentage, %; X swk : Moisture content of flue gas from the kth exhaust chimney.

[0058] S2-2: Dry flue gas volume flow rate Q of the kth exhaust pipe under standard conditions snk Calculation:

[0059]

[0060] Where: Q snk : The dry flue gas volume flow rate of the kth exhaust pipe under standard conditions, unit: m 3 / h; A k : The area of ​​the cross section of the kth exhaust pipe, unit: m 2 ; K V : velocity field coefficient; The average velocity of wet flue gas at the measured section of the kth exhaust stack measured by CEMS, in m / s; t sk : The flue gas temperature of the kth exhaust pipe, in degrees Celsius; P atm : Atmospheric pressure, unit: Pa; P sk : The static pressure (gauge pressure) of the flue gas of the kth exhaust chimney, unit: Pa.

[0061] S2-3: Calculation of hourly carbon emissions of the kth exhaust pipe of a high energy-consuming enterprise:

[0062] E排气筒k =C dk ×Q snk ×10 -3 (3);

[0063] Where: E 排气筒k : Hourly carbon emissions of the kth exhaust pipe, unit: kg / h.

[0064] S2-4: Calculation of carbon emissions from all exhaust pipes of high energy-consuming enterprises:

[0065]

[0066] Where: E 排气筒 : Carbon emissions from all exhaust chimneys of high-energy-consuming enterprises. The number of exhaust chimneys in all production processes of high-energy-consuming enterprises is marked as l, where the kth exhaust chimney k = 1, 2, ..., l.

[0067] (3) Calculate the carbon emissions E of the first unorganized carbon emission source using the emission factor method 无组织节点 , specifically including:

[0068] S3-1: Carbon emissions are calculated based on the actual usage of fluxes such as limestone and dolomite, carbon-containing chemicals such as soda ash and oxalic acid, and purchased carbon-containing raw materials such as electrodes, pig iron, and scrap steel, and the carbon dioxide emission factor. The number of unorganized carbon emission nodes involving the use of fluxes such as limestone and dolomite, carbon-containing chemicals such as soda ash and oxalic acid, and purchased carbon-containing raw materials such as electrodes, pig iron, and scrap steel in the production process of high-energy-consuming enterprises is marked as s, where the tth unorganized carbon emission node t=1, 2,…, s.

[0069] S3-2: Calculation method for the unorganized carbon emissions of flux, carbon-containing chemicals, and carbon-containing raw materials such as electrodes, pig iron, and scrap steel at the tth unorganized carbon emission node of high-energy-consuming enterprises:

[0070] E 无组织节点t =M CDt ×E CDt (5);

[0071] Where: E 无组织节点t : The unorganized carbon emissions of flux, carbon-containing chemicals, and carbon-containing raw materials such as electrodes, pig iron, and scrap steel at the tth unorganized carbon emission node, unit: kgCO 2 ;M CDt : The amount of flux, carbon-containing chemicals, and carbon-containing raw materials such as electrodes, pig iron, and scrap steel used, in tons; E CDt : Carbon dioxide emission factor, carbon emission coefficient corresponding to flux, carbon-containing chemicals, electrodes, pig iron, scrap steel and other carbon-containing raw materials, unit: kgCO 2 / t raw materials.

[0072] S3-3: Calculation method for the total amount of unorganized carbon emissions from fluxes, carbon-containing chemicals, and carbon-containing raw materials such as electrodes, pig iron, and scrap steel at all nodes of high-energy-consuming enterprises:

[0073]

[0074] Where: E 无组织节点 : The total amount of unorganized carbon emissions from flux, carbon-containing chemicals, and carbon-containing raw materials such as electrodes, pig iron, and scrap steel at all nodes.

[0075] (4) Calculate the carbon emissions E of the second unorganized carbon emission source using the actual measurement method 无组织源 , specifically including:

[0076] S4-1: Based on the list of unorganized carbon emission sources of high-energy-consuming enterprises, the number of production processes involving fossil fuel combustion that produce unorganized emissions in high-energy-consuming enterprises is sorted out as m, where the i-th production process i = 1, 2, ..., m; the number of unorganized emission sources in each production process is recorded as n, then the j-th unorganized emission source in a certain production process is j = 1, 2, ..., n; the carbon emissions of any unorganized emission source in the production process of high-energy-consuming enterprises is recorded as E ij ,

[0077]

[0078] Where: E ij : Carbon emissions from the jth unorganized emission source in the production process i of a high-energy-consuming enterprise, in kg / h. K ij : Correction coefficient of the jth unorganized emission source in the production process i of a high-energy-consuming enterprise; This embodiment uses the material balance method to calculate the CO of the jth unorganized emission source in the production process i of a high-energy-consuming enterprise 2 Emissions, denoted as Q ij , Q ij 、Effective flue gas emission height H ij , Ambient average wind speed CO 2 Environmental background value of concentration and 5 CO 2 Concentration values ​​C(20m), C(25m), C(30m), C(35m), C(40m), 5 smoke horizontal diffusion coefficients σ yij (20m),σ yij (25m), σ yij (30m), σ yij (35m), σ yij (40m) and 5 smoke vertical diffusion coefficients σ zij (20m),σ zij (25m), σzij (30m), σ zij (35m), σ zij (40m) data are substituted into formula (7) to calculate K ij (20m), K ij (25m), K ij (30m), K ij (35m), K ij (40m), take the arithmetic mean to get the correction coefficient K ij C(x) ij : The CO2 emission of the jth unorganized emission source in the production process i of the high-energy-consuming enterprise is x meters away from the emission source along the downwind ground axis. 2 Ground concentration, unit: mg / m 3 The gas chromatography or infrared absorption method is used to test and obtain the CO2 emission of the jth unorganized emission source in the production process i of the high-energy-consuming enterprise at a distance of x meters from the emission source along the downwind ground axis. 2 Concentration C(x) ij data. The jth unorganized emission source CO in production process i of a high energy-consuming enterprise 2 Environmental background value of concentration, unit: mg / m 3 In the present invention, 15 sampling points are set at 5m, 20m and 50m away from the fugitive emission source within a 60° fan-shaped range with the ground axis as the center in the upwind direction of the fugitive emission source, and the CO at the 15 sampling points is tested by gas chromatography or infrared absorption method. 2 The concentration of CO 2 Environmental background value of concentration The average wind speed of the environment around the jth unorganized emission source in the production process i of a high-energy-consuming enterprise is in m / s. The present invention uses a wind speed measuring instrument to test the wind speed of the environment around the unorganized emission source. One instant wind speed is read every 2 minutes. The test is continued for 30 minutes to obtain 15 wind speed values. The arithmetic average of the 15 wind speed values ​​is used to obtain the average wind speed of the environment. σ yij : The horizontal diffusion coefficient of flue gas in the horizontal direction perpendicular to the downwind direction at a distance of x meters from the jth unorganized emission source in the production process i of a high-energy-consuming enterprise, in m. zij : The vertical diffusion coefficient of smoke in the vertical direction perpendicular to the downwind direction at a distance of x meters from the jth unorganized emission source in the production process i of a high-energy-consuming enterprise, in m. In this embodiment, sampling points are set at 20m, 25m, 30m, 35m and 40m away from the emission source along the ground axis in the downwind direction of the unorganized emission source, and the CO at each sampling point is tested by gas chromatography or infrared absorption method. 2The concentrations of are recorded as C(20m), C(25m), C(30m), C(35m) and C(40m) respectively. At the same time, a three-dimensional ultrasonic anemometer is used to measure the horizontal diffusion coefficient of flue gas σ yij (20m),σ yij (25m), σ yij (30m), σ yij (35m), σ yij (40m) and smoke vertical diffusion coefficient σ zij (20m),σ zij (25m), σ zij (30m), σ zij (35m), σ zij (40m). ij : The effective emission height of the flue gas from the jth unorganized emission source of the production process i of the high-energy-consuming enterprise, in meters. For the unorganized emissions of high-energy-consuming enterprises, the power and thermal enhancement of the flue gas are ignored, H ij Replaced by the geometric height of the fugitive emission source.

[0079] S4-2: Calculation method for total carbon emissions from unorganized emission sources of high energy-consuming enterprises:

[0080]

[0081] Where: E 无组织源 : Total carbon emissions from unorganized emission sources of high energy-consuming enterprises, unit: kg / h; E ij : Carbon emissions from the jth unorganized emission source in production process i of a high-energy-consuming enterprise, unit: kg / h.

[0082] (5) Calculate the carbon emissions E from indirect carbon emission sources using the emission factor method 间接源 , specifically including:

[0083] For carbon dioxide emissions generated by net purchased electricity and heat, the emission factor method is used to calculate carbon emissions, and the carbon dioxide emissions from indirect carbon emission sources are calculated based on activity data and carbon dioxide emission factors.

[0084] The emission factor method used is the calculation formula for carbon dioxide emissions from indirect carbon emission sources:

[0085] E 间接源 =EE e ×E e +EH h ×E h (9)

[0086] Where: E 间接源 : Indirect carbon emission sources, that is, carbon dioxide emissions generated by net purchased electricity and heat, unit: kgCO2 ;EE e : Net purchased electricity, unit: MW·h; EH h : Net purchased heat, unit: GJ; E e : Grid emission factor, unit: kgCO 2 / MW·h; E h : Thermal emission factor, unit: kgCO 2 / GJ.

[0087] (6) According to steps (2)-(5), the total carbon emissions of high energy-consuming enterprises are obtained: 总 =E 排气筒 +E 无组织节点 +E 无组织源 +E 间接源 (10).

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A refined accounting method for carbon emissions of high energy-consuming enterprises, characterized in that: The steps include: (1) Collect data on direct carbon emission sources, first unorganized carbon emission sources, second unorganized carbon emission sources, and indirect carbon emission sources in the production process of high-energy-consuming enterprises; the first unorganized carbon emission source is the CO2 directly emitted in the form of unorganized emissions from the consumption of flux, carbon-containing chemicals, and purchased carbon-containing raw materials in the production process of high-energy-consuming enterprises; the second unorganized carbon emission source is the CO2 emitted by the unorganized flue gas emission sources of high-energy-consuming enterprises; (2) Calculate the carbon emissions E from direct carbon emission sources using the actual measurement method 排气筒 ; (3) Calculate the carbon emissions E of the first unorganized carbon emission source using the emission factor method 无组织节点 ; (4) Calculate the carbon emissions E of the second unorganized carbon emission source using the actual measurement method 无组织源 ; (5) Calculate the carbon emissions E from indirect carbon emission sources using the emission factor method 间接源 ; (6) According to steps (2)-(5), the total carbon emissions of high energy-consuming enterprises are obtained: 总 =E 排气筒 +E 无组织节点 +E 无组织源 +E 间接源 .

2. The refined accounting method for carbon emissions of high energy-consuming enterprises according to claim 1 is characterized in that: The direct carbon emission sources include CO2 generated by the consumption of flux, carbon-containing chemicals and purchased carbon-containing raw materials in the production process of high-energy-consuming enterprises, and CO2 emitted in a centralized manner through exhaust pipes when mixed with CO2 generated by the combustion of fossil fuels.

3. The refined accounting method for carbon emissions of high energy-consuming enterprises as claimed in claim 1 is characterized in that: The unorganized carbon emission sources are CO2 emitted from unorganized emission sources of high energy-consuming enterprises.

4. The refined carbon emission accounting method for high energy consumption enterprises as claimed in claim 1 is characterized in that: The indirect carbon emission source is the CO2 emitted by the net purchase of electricity and heat used by high-energy-consuming enterprises.

5. The refined accounting method for carbon emissions of high energy-consuming enterprises as claimed in claim 1 is characterized in that: In step (2), the carbon emission of the direct carbon emission source E 排气筒 The calculation specifically includes the following steps: S2-1: Collect the real-time wet-based volume concentration C of CO2 gas emitted from the exhaust pipes of the production process of high-energy-consuming enterprises s , average flow rate of wet flue gas in section Flue gas temperature t s , Flue gas static pressure P s and flue gas moisture content X sw ; S2-2: Calculate the CO2 dry mass concentration C of the kth exhaust pipe under standard conditions based on the data collected in step S2-1 dk for: Among them, C dk is the CO2 dry mass concentration of the kth exhaust pipe under standard conditions, in g / m 3 ; C sk is the CO2 wet volume concentration of the kth exhaust pipe, in %; X swk is the humidity content of the smoke from the kth exhaust pipe, in %; S2-3: Calculate the dry flue gas volume flow Q of the kth exhaust pipe under standard conditions according to the data collected in step S2-1 snk for: Among them, A k The area of ​​the cross section of the kth exhaust pipe, in m 2 ; K v is the velocity field coefficient; is the average velocity of wet flue gas at the measured section of the kth exhaust chimney, in m / s; t sk is the flue gas temperature of the kth exhaust pipe, in degrees Celsius; P atm is atmospheric pressure, unit: Pa; P sk is the flue gas static pressure of the kth exhaust pipe, in Pa; S2-4: Based on formulas (1) and (2), the carbon emissions of all exhaust pipes of high-energy-consuming enterprises are obtained: 排气筒 : l is the total number of exhaust pipes.

6. The refined carbon emission accounting method for high energy consumption enterprises as claimed in claim 1 is characterized in that: In step (3), the carbon emission of the first unorganized carbon emission source E 无组织节点 The calculation specifically includes: S3-1: The number of unorganized carbon emission nodes involving flux, carbon-containing chemicals and purchased carbon-containing raw materials in the production process of high-energy-consuming enterprises is marked as s, where the tth unorganized carbon emission node t = 1, 2, ..., s; S3-2: Unorganized carbon emissions E of flux, carbon-containing chemicals and purchased carbon-containing raw materials at the tth unorganized carbon emission node 无组织节点t for: HAVE BEEN 无组织节点t =M CDt ×E CDt (5); Among them, M CDt E is the usage of flux, carbon-containing chemicals and purchased carbon-containing raw materials, unit: t; cDt E is the carbon emission coefficient corresponding to flux, carbon-containing chemicals and purchased carbon-containing raw materials, and the unit is: kgCO2 / t flux, carbon-containing chemicals and purchased carbon-containing raw materials; 无组织节点t is the unorganized carbon emissions of flux, carbon-containing chemicals and purchased carbon-containing raw materials at the tth unorganized carbon emission node, in kg; S3-3: Therefore, the total amount of unorganized carbon emissions from the use of flux, carbon-containing chemicals and purchased carbon-containing raw materials at all nodes of high-energy-consuming enterprises is E 无组织节点 for:

7. The refined accounting method for carbon emissions of high energy-consuming enterprises as claimed in claim 1 is characterized in that: In step (4), the carbon emission of the second unorganized carbon emission source E 无组织源 The accounting includes: S4-1: The number of production processes of high-energy-consuming enterprises involving unorganized carbon emission sources generated by fossil fuel combustion is recorded as m, where the i-th production process i=1, 2, ..., m; the number of unorganized carbon emission sources in each production process is recorded as n, then the j-th unorganized emission source in a certain production process j=1, 2, ..., n; S4-2: The carbon emissions of the jth unorganized emission source in the production process i of a high-energy-consuming enterprise are recorded as Ei j , then the total carbon emissions of the second unorganized carbon emission source of high energy-consuming enterprises is E 无组织源 for:

8. The refined accounting method for carbon emissions of high energy-consuming enterprises as claimed in claim 7 is characterized in that: The carbon emissions E of the jth unorganized emission source in the production process i of the high energy-consuming enterprise ij for: Among them, K ij C(x) is the correction coefficient of the jth fugitive emission source in the production process i of a high energy-consuming enterprise; ij The CO2 ground concentration at a distance of x meters from the emission source along the downwind ground axis of the jth unorganized emission source in the production process i of the high-energy-consuming enterprise is expressed in mg / m 3 ; is the environmental background value of CO2 concentration of the jth unorganized emission source in the production process i of the high energy-consuming enterprise, in mg / m 3 ; is the average wind speed around the jth unorganized emission source in the production process i of the high-energy-consuming enterprise, in m / s; σ yij is the horizontal diffusion coefficient of flue gas in the horizontal direction perpendicular to the downwind direction at a distance of x meters from the jth unorganized emission source in the production process i of the high-energy-consuming enterprise, in m; σ zij H is the vertical diffusion coefficient of smoke in the vertical direction perpendicular to the downwind direction at a distance of x meters from the jth unorganized emission source in the production process i of the high-energy-consuming enterprise, in m; ij It is the effective emission height of flue gas from the jth unorganized emission source in production process i of high-energy-consuming enterprise, in meters.

9. The refined carbon emission accounting method for high energy consumption enterprises as claimed in claim 1 is characterized in that: In step (5), the carbon emission of the indirect carbon emission source E 间接源 for: ITS 间接源 =YES e ×E e +EH h ×E h (10) Among them, E 间接源 It is an indirect carbon emission source, that is, the carbon dioxide emissions generated by the net purchase of electricity and heat, in kg; EE e The net amount of electricity purchased is in MW·h; EH h Net purchased heat, unit: GJ; E e is the grid emission factor, unit: kgCO2 / MW·h; E h It is the thermal emission factor, and its unit is kgCO2 / GJ.

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