Carbon emission reduction accounting method and system for agricultural utilization of tailings

Abstract

The invention discloses a tailing agricultural utilization carbon emission reduction accounting method and system, and the technical scheme of the invention comprises the steps: respectively building a tailing agricultural utilization carbon emission database and a reference line carbon emission database through recognizing a tailing agricultural utilization carbon emission source and a reference line carbon emission source; the method has the advantages that the carbon emission of different nodes in the agricultural utilization process of the tailings is comprehensively and accurately calculated, the emission reduction comparison with the carbon emission of an alternative scheme is realized, and the carbon emission reduction feasibility of the agricultural utilization of the tailings is evaluated; and reference data is provided for formulating a reasonable tailing comprehensive utilization policy and low-carbon mine development measures in the mine industry.

Description

Technical Field

[0001] The present invention belongs to the field of carbon emission reduction calculation, and specifically relates to a carbon emission reduction accounting method and system for agricultural utilization of tailings. Background Art

[0002] At present, the main ways to use tailings include filling materials in mining goafs, raw materials for building materials, and roadbed materials for highway filling. However, due to the limitations of their application scenarios and the inability to use them on a large scale on site, the utilization rate of tailings in my country is only 32.5%. The particle size of my country's tailings is mainly powder and sand, containing a variety of mineral components. Its unique physical and chemical properties and structural characteristics can be used to prepare soil conditioners, mineral fertilizers, seedling substrates, artificial soil, etc. The application scenarios of soil conditioners, mineral fertilizers, seedling substrates, artificial soil and other products are less limited and can be consumed on site according to local conditions. Therefore, the agriculturalization of tailings is one of the important ways to utilize tailings as resources.

[0003] Tailings resource utilization faces huge pressure to reduce emissions. The unique structural and compositional characteristics of tailings make them have the potential to reduce carbon emissions during agricultural utilization, which can effectively reduce carbon emissions from the source. However, there is no unified accounting method for the carbon emission reduction of tailings agricultural utilization schemes, which seriously affects the optimization of mining companies' choice of tailings resource utilization schemes. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a method and system for calculating carbon emission reduction from agricultural utilization of tailings.

[0005] The method for calculating carbon emission reduction from agricultural utilization of tailings of the present invention comprises the following steps:

[0006] S1. Determine the baseline for agricultural utilization of tailings and identify the baseline emission sources;

[0007] S2. Obtain the characteristic data and carbon emission factors of baseline carbon emissions, and establish a baseline carbon emission database for agricultural utilization of tailings;

[0008] S3. Calculate the baseline carbon emissions of agricultural utilization of tailings based on the baseline carbon emissions database of agricultural utilization of tailings;

[0009] S4. Identify carbon emission sources from agricultural use of tailings;

[0010] S5. Obtain characteristic data and carbon emission factor data during the agricultural utilization of tailings, and establish a database of carbon emissions from agricultural utilization of tailings;

[0011] S6. Calculate the carbon emissions from agricultural utilization of tailings according to the database of carbon emissions from agricultural utilization of tailings;

[0012] S7. Calculate the carbon emission reduction from agricultural utilization of tailings based on the carbon emissions from agricultural utilization of tailings and the baseline carbon emissions.

[0013] The tailings include single metal iron tailings of high silicon type, high aluminum type and high calcium and magnesium type;

[0014] The agricultural utilization of tailings refers to the production of agricultural utilization products using tailings, and the agricultural utilization products include mineral fertilizers, improvers and matrix soil;

[0015] The baseline for agricultural utilization of tailings refers to the conventional production process of the agricultural utilization product.

[0016] The carbon emission sources for agricultural utilization of tailings and the baseline carbon emission sources include the upstream raw material mining and selection process, raw material transportation process, energy consumption in the product manufacturing process, and product production process.

[0017] The entry contents of the tailings agricultural utilization carbon emissions database and the baseline carbon emissions database include data code, data category, data value, data dimension, data region, and data year.

[0018] The baseline carbon emissions from agricultural utilization of tailings in S3 are the carbon emissions generated by agricultural utilization products per unit weight of conventional production, and the calculation methods include energy consumption limit method and classification method.

[0019] The calculation method of the baseline carbon emissions from agricultural utilization of tailings using the energy consumption limit method is as follows:

[0020]

[0021] In the formula, BCE ta Baseline carbon emissions per ton of agricultural products produced using tailings, tCO2 / t; ECL im The consumption limit of the i-th type of energy in the m-th production link for every ton of product produced, Mwh / t, t / t or Nm 3 / t;CEF i is the carbon emission factor of the i-th energy source, t CO2 / Mwh, t CO2 / t or t CO2 / Nm 3 ;ω m is the weight conversion coefficient between the product and the mineral material in the mth production link; PCL is the power consumption limit, Mwh / t; ECEF is the power carbon emission factor, t CO2 / Mwh; FCL j Non-electricity consumption limit, i.e. fossil fuel consumption limit, t / t or Nm 3 / t;FCEF j is the carbon emission factor of fossil fuels, t CO2 / t or t CO2 / Nm 3;ECL t is the energy consumption limit for each ton of product produced, t standard coal / t; PCR is the proportion of electricity consumption in the energy consumption limit, dimensionless; EEF is the carbon emission factor of electricity, t CO2 / t standard coal; FEF is the average carbon emission factor of non-electric energy, t CO2 / t standard coal; BCE te Baseline carbon emissions caused by the product production process, tCO2 / t.

[0022] The calculation method of the baseline carbon emissions from agricultural utilization of tailings is as follows:

[0023] BCE ta =BCE ex +BCE tr +BCE pr +BCE te

[0024] In the formula, BCE ta Baseline carbon emissions per ton of agricultural products produced using tailings, tCO2 / t; BCE ex Baseline carbon emissions from upstream raw material mining and selection, tCO2 / t; BCE tr Baseline carbon emissions from raw material transportation, tCO2 / t; BCE pr Baseline carbon emissions generated by energy consumption during product manufacturing, tCO2 / t; BCE te is the baseline carbon emissions caused by the product production process, tCO2 / t;

[0025] Baseline carbon emissions (BCE) generated by the upstream raw material selection process ex The calculation method is:

[0026] BCE ex =PC bex ×ECEF×ω0+∑ j FC bexj ×FCEF j ×ω0

[0027] In the formula, PC bex is the baseline power consumption in the upstream raw material mining process, Mwh / t; ω0 is the weight conversion coefficient between the product and the mineral material; FC bexj Non-electricity baseline consumption in the upstream raw material mining process, i.e. fossil fuel consumption, t / t or Nm 3 / t; ECEF is the electricity carbon emission factor, t CO2 / Mwh; FCEF is the electricity carbon emission factor, t CO2 / Mwh j is the carbon emission factor of fossil fuels, tCO2 / t or tCO2 / Nm 3 ;

[0028] Baseline carbon emissions (BCE) generated during the transportation of the raw materials tr The calculation method is:

[0029]

[0030] In the formula, PC btr is the baseline electricity consumption during the transportation of raw materials, Mwh / t; FC btrj Non-electricity baseline consumption during raw material transportation, i.e. fossil fuel consumption, t / t or Nm 3 / t; TA is the raw material baseline transportation volume, t / t; TEF is the transportation carbon emission factor, t CO2 / , t·km; TM is the raw material transportation baseline mileage, km;

[0031] Baseline carbon emissions (BCE) generated by energy consumption during the manufacturing process of the product pr The calculation method is:

[0032] BCE pr =PC bpr +ECEF+ j FC bprj ×FCEF j

[0033] In the formula, PC bpr is the baseline electricity consumption during product manufacturing, Mwh / t; FC bprj Non-electricity baseline consumption in the manufacturing process of the product, i.e. fossil fuel consumption, t / t or Nm 3 / t;

[0034] Baseline carbon emissions caused by the production process of the product BCE te The calculation method is:

[0035] BCE te =(∑ k MC k ×M k -FC)×α

[0036] In the formula, MC k is the baseline carbon content of the kth raw material, tC / t; M k is the baseline amount of the kth raw material, t / t; FC is the baseline carbon content of the product, tC / t; α is the conversion coefficient of carbon and carbon dioxide, which is

[0037] The carbon emissions from agricultural utilization of tailings in S6 are the carbon emissions generated by producing a unit weight of agricultural utilization products using tailings, and the calculation methods include emission reduction coefficient method and classification method.

[0038] The calculation method of carbon emissions from agricultural utilization of tailings using the emission reduction coefficient method is as follows:

[0039] PCE ta =BCE ta ×(1-β)

[0040] Where PCE ta Carbon emissions per ton of agricultural products produced using tailings, tCO2 / t; BCE ta is the baseline carbon emissions per ton of agricultural products produced from tailings, tCO2 / t; β is the carbon emission reduction coefficient per ton of agricultural products produced from tailings.

[0041] The calculation method of carbon emissions from agricultural utilization of tailings using the classification method is as follows:

[0042] PCE ta =PCE ex +PCE tr +PCE pr +PCE te

[0043] Where PCE ex is the carbon emissions generated by the upstream raw material mining process, tCO2 / t; PCE tr is the carbon emissions generated during the transportation of raw materials, tCO2 / t; PCE pr The carbon emissions generated by energy consumption during product manufacturing, tCO2 / t; PCE te Carbon emissions caused by the product production process, tCO2 / t;

[0044] Carbon emissions generated by the upstream raw material selection process PCE ex The calculation method is:

[0045]

[0046] In the formula, PC pex is the electricity consumption in the upstream raw material mining process, Mwh / t; ω is the weight conversion coefficient between agricultural utilization products and tailings materials; FC pexj Non-electricity consumption in the upstream raw material mining process, that is, fossil fuel consumption, t / t or Nm 3 / t;BCE ex is the baseline carbon emissions generated by the upstream raw material mining process, tCO2 / t; β ex Carbon emission reduction coefficient of upstream raw material mining and selection process;

[0047] Carbon emissions generated during the transportation of raw materials PCE tr The calculation method is:

[0048]

[0049] In the formula, PC ptr is the electricity consumption during the transportation of raw materials, Mwh / t; FC ptrj Non-electricity consumption during the transportation of raw materials, i.e. fossil fuel consumption, t / t or Nm 3 / t; Ta is the raw material transportation volume, t / t; Tm is the raw material transportation mileage, km; β tr BCE is the carbon reduction coefficient in the raw material transportation process; tr Baseline carbon emissions generated during the transportation of raw materials, tCO2 / t;

[0050] Carbon emissions generated by energy consumption during the manufacturing process of the product PCE pr The calculation method is:

[0051]

[0052] In the formula, PC ppr is the electricity consumption in the product manufacturing process, Mwh / t; FC pprj Non-electricity consumption in the product manufacturing process, that is, fossil fuel consumption, t / t or Nm 3 / t; β pr is the carbon reduction factor of energy consumption in the manufacturing process of mineral fertilizers;

[0053] Carbon emissions caused by the production process of the product PCE te The calculation method is:

[0054]

[0055] In the formula, Mc k is the carbon content of the kth raw material, tC / t; m k is the amount of the kth raw material, t / t; Fc is the carbon content of the product, tC / t; BCE pr Baseline carbon emissions generated by energy consumption during product manufacturing, tCO2 / t; β te It is the carbon emission reduction coefficient of the product production process.

[0056] The calculation method of carbon emission reduction of tailings agricultural utilization is as follows:

[0057] ETA tl =ETA×PC l

[0058] ETA=BCEta -PCE ta

[0059] Where, ETA tl is the carbon emission reduction of using tailings to produce agricultural products in the first year, tCO2; ETA is the carbon emission reduction of using tailings to produce 1 ton of agricultural products, tCO2 / t; PC l The output of agricultural products produced by tailings in the first year, t; PCE ta Carbon emissions per ton of agricultural products produced using tailings, tCO2 / t; BCE ta Baseline carbon emissions per ton of agricultural products produced from tailings, tCO2 / t.

[0060] The carbon emission reduction accounting system for agricultural utilization of tailings of the present invention adopts the carbon emission reduction accounting method for agricultural utilization of tailings of the present invention to perform carbon emission reduction accounting for agricultural utilization of tailings, and the carbon emission reduction accounting system for agricultural utilization of tailings includes a carbon emission source identification module, a carbon emission database establishment module, a carbon emission calculation module and a carbon emission reduction summary module;

[0061] The carbon emission source identification module includes a tailings agricultural utilization carbon emission source identification unit and a tailings agricultural utilization baseline carbon emission source identification unit;

[0062] The carbon emission database establishment module includes a tailings agricultural utilization carbon emission database establishment unit and a tailings agricultural utilization baseline carbon emission database establishment unit;

[0063] The carbon emission calculation module includes a tailings agricultural utilization carbon emission calculation unit and a tailings agricultural utilization baseline carbon emission calculation unit.

[0064] The beneficial effect of the present invention is that the present invention provides a method and system for calculating carbon emission reductions from agricultural utilization of tailings. The method identifies the carbon emission sources from agricultural utilization of tailings and the baseline carbon emission sources, and establishes a carbon emission database from agricultural utilization of tailings and a baseline carbon emission database respectively. The method has the technical effect of comprehensively and accurately calculating the carbon emissions at different nodes in the process of agricultural utilization of tailings, and realizing emission reduction comparison with the carbon emissions of alternative options, thereby evaluating the feasibility of carbon emission reduction from agricultural utilization of tailings, and providing reference data for the mining industry to formulate reasonable comprehensive tailings utilization policies and low-carbon mine development measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 It is a flow chart of the carbon emission reduction accounting method for agricultural utilization of tailings of the present invention.

[0066] Figure 2It is a carbon emission reduction calculation module of the carbon emission reduction accounting system for agricultural utilization of tailings of the present invention. DETAILED DESCRIPTION

[0067] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0068] Example

[0069] like Figure 1 As shown, the carbon emission reduction accounting method for agricultural utilization of tailings of the present invention comprises the following steps:

[0070] S1. Determine the baseline for agricultural utilization of tailings and identify the baseline emission sources;

[0071] The baseline for agricultural utilization of tailings is determined as the production process of conventional mineral fertilizers. The corresponding baseline carbon emission sources include the upstream raw material mining and selection process, raw material transportation process, energy consumption in the product manufacturing process, and product production process.

[0072] S2. Obtain the characteristic data and carbon emission factors of baseline carbon emissions, and establish a baseline carbon emission database for agricultural utilization of tailings, as shown in Table 1;

[0073] Table 1 Baseline carbon emissions database for agricultural utilization of tailings

[0074]

[0075] S3. Calculate the baseline carbon emissions of agricultural utilization of tailings according to Table 1 of the baseline carbon emissions database of agricultural utilization of tailings;

[0076] The baseline carbon emissions from agricultural utilization of tailings are the carbon emissions generated by the conventional production of 1 ton of mineral fertilizers. According to Table 1, the baseline carbon emissions from agricultural utilization of tailings are calculated using the energy consumption limit method.

[0077] Baseline carbon emissions from agricultural use of tailings BCE ta The calculation method is:

[0078] BCE ta =∑ im ECL im ×CEF i ×ω m +BCE te

[0079] In the formula, BCE ta Baseline carbon emissions per ton of agricultural products produced using tailings, tCO2 / t; ECLi mThe consumption limit of the i-th type of energy in the m-th production link for every ton of product produced, Mwh / t, t / t or Nm 3 / t;CEF i is the carbon emission factor of the i-th energy source, t CO2 / Mwh, t CO2 / t or t CO2 / Nm 3 ;ω m BCE is the weight conversion coefficient between products and mineral materials in the mth production link; te It is the baseline carbon emission caused by the product production process, tCO2 / t.

[0080] BCE te The baseline carbon emissions caused by the product production process. The conventional mineral fertilizer production process only involves raw material crushing and mixing and mineral element activation, and there is no carbon emission link. Therefore, BCE te The value is 0tCO2 / t.

[0081] Therefore, according to Table 1, the baseline carbon emissions for producing 1 ton of mineral fertilizer using tailings = 0.275t standard coal / t×2.741tCO2 / t standard coal×1+0.008t standard coal / t×2.741tCO2 / t standard coal×0.947+0tCO2 / t=0.775tCO2 / t.

[0082] S4. Identify carbon emission sources from agricultural use of tailings;

[0083] It was determined that the tailings material was high-silicon iron tailings;

[0084] Agricultural utilization of tailings refers to the use of high-silicon iron tailings to produce silicon fertilizer.

[0085] The carbon emission sources from the agricultural utilization of tailings include the upstream raw material mining and selection process, the raw material transportation process, the energy consumption in the product manufacturing process, and the product production process.

[0086] S5. Obtain the characteristic data and carbon emission factor data during the agricultural utilization of tailings, and establish a database of carbon emissions from agricultural utilization of tailings, as shown in Table 2.

[0087] Table 2 Establishment of carbon emission database for agricultural utilization of tailings

[0088] Data Code Data Category Data Value Data Dimension Data region Data Year <![CDATA[FC pexj ]]> Carbon emissions accounting 0.001 tStandard coal / t China 2024 <![CDATA[FCEF j ]]> Carbon emissions accounting 2.741 <![CDATA[tCO2 / ton of standard coal]]> China 2015 ω Carbon emissions accounting 0.947 Dimensionless — 2015 <![CDATA[FC bprj ]]> Carbon emissions accounting 0.275 tStandard coal / t China 2023 <![CDATA[β pr ]]> Carbon emissions accounting 0.248 Dimensionless Liaoning Province 2024 <![CDATA[PC l ]]> Carbon emission reduction accounting 3100 10,000 tons China 2023

[0089] S6. Calculate the carbon emissions from agricultural utilization of tailings according to Table 2 of the database of carbon emissions from agricultural utilization of tailings;

[0090] The carbon emissions from agricultural utilization of tailings are the carbon emissions generated by producing 1 ton of silicon fertilizer using high-silicon iron tailings. The classification method is used to calculate the carbon emissions from agricultural utilization of tailings.

[0091] Carbon emissions from agricultural utilization of tailings PCE ta The calculation method is:

[0092] PCE ta =PCE ex +PCE tr +PCE pr +PCE te

[0093] Where PCE ta Carbon emissions per ton of tailings used to produce agricultural products, tCO2 / t; PCE ex is the carbon emissions generated by the upstream raw material mining process, tCO2 / t; PCE tr is the carbon emissions generated during the transportation of raw materials, tCO2 / t; PCE pr The carbon emissions generated by energy consumption during product manufacturing, tCO2 / t; PCE te It is the carbon emission caused by the product production process, tCO2 / t.

[0094] PCE tr The carbon emissions generated during the transportation of raw materials are reduced. The production of silicon fertilizer using high-silicon iron tailings can achieve on-site iron tailings disposal and silicon fertilizer production in the mine. Therefore, PCE tr The value is 0tCO2 / t.

[0095] PCE te The carbon emissions caused by the production process of the product. The production process of silicon fertilizer using iron tailings only involves mixing and stirring of raw materials and activation of silicon, and there is no carbon emission link. Therefore, PCE te The value is 0tCO2 / t.

[0096] Carbon emissions generated by upstream raw material mining and selection process PCE ex The calculation method is:

[0097] PCE ex =PC pex ×ECEF×ω+∑ j FC pexj ×FCEF j ×ω

[0098] In the formula, PC pex is the electricity consumption in the upstream raw material mining process, Mwh / t; ECEF is the electricity carbon emission factor, t CO2 / Mwh; ω is the weight conversion coefficient between agricultural utilization products and tailings materials; FC pexj Non-electricity consumption in the upstream raw material mining process, that is, fossil fuel consumption, t / t or Nm 3 / t;FCEF j is the carbon emission factor of fossil fuels, t CO2 / t or t CO2 / Nm 3 ;

[0099] The carbon emissions generated by the upstream raw material mining process are calculated using fossil fuel consumption, and the fossil fuel consumption and carbon emission factors are measured in standard coal.

[0100] Carbon emissions generated by the upstream raw material mining and selection process = 0.001t standard coal / t × 2.741tCO2 / t standard coal × 0.947 = 0.002tCO2 / t.

[0101] Carbon emissions generated by energy consumption during product manufacturing process PCE pr The calculation method is:

[0102] PCE pr =BCE pr ×(1-β pr )

[0103] In the formula, BCE pr The baseline carbon emissions generated by energy consumption during product manufacturing; pr is the carbon reduction factor of energy consumption in the manufacturing process of mineral fertilizers;

[0104] Baseline carbon emissions generated by energy consumption during product manufacturing pr The calculation method is:

[0105] BCE pr =PC bpr +ECEF+∑ j FC bpr ×FCEF j

[0106] In the formula, PC bpr is the baseline electricity consumption in the product manufacturing process, Mwh / t; ECEF is the electricity carbon emission factor, t CO2 / Mwh; FC bprj Non-electricity baseline consumption in the manufacturing process of the product, i.e. fossil fuel consumption, t / t or Nm 3 / t;FCEF j is the carbon emission factor of fossil fuels, t CO2 / t or tCO2 / Nm 3 .

[0107] Baseline carbon emissions generated by energy consumption during product manufacturing pr The calculation is based on fossil fuel consumption, and the fossil fuel consumption and carbon emission factors are measured in standard coal.

[0108] Baseline carbon emissions generated by energy consumption during product manufacturing pr =0.275t standard coal / t×2.741tCO2 / t standard coal=0.754t CO2 / t

[0109] Carbon emissions generated by energy consumption during product manufacturing process PCE pr =0.754tCO2 / t×(1-0.248)=0.567tCO2 / t

[0110] Carbon emissions from agricultural utilization of tailings PCE ta =0.002tCO2 / t+0.567tCO2 / t=0.569tCO2 / t.

[0111] S7. Calculate the carbon emission reduction from agricultural utilization of tailings based on the carbon emissions from agricultural utilization of tailings and the baseline carbon emissions.

[0112] The calculation method for carbon emission reduction from agricultural utilization of tailings is:

[0113] ETA tl =ETA×PC l

[0114] ETA=BCE ta -PCE ta

[0115] Where, ETA tl is the carbon emission reduction of using tailings to produce agricultural products in the first year, tCO2; ETA is the carbon emission reduction of using tailings to produce 1 ton of agricultural products, tCO2 / t; PC l The output of agricultural products produced by tailings in the first year, t; PCE ta Carbon emissions per ton of agricultural products produced using tailings, tCO2 / t; BCE ta Baseline carbon emissions per ton of agricultural products produced from tailings, tCO2 / t.

[0116] Carbon emission reduction from producing 1 ton of agricultural products using tailings ETA = 0.775tCO2 / t - 0.569tCO2 / t = 0.206tCO2 / t

[0117] The output of agricultural products produced from tailings in the first year is calculated based on the national annual demand for silicon fertilizer, which is approximately 31 million tons.

[0118] Therefore, the carbon emission reduction of using tailings to produce agricultural products is ETA tl = 0.206tCO2 / t × 31 million tons = 6.386 million tonsCO2

[0119] Therefore, in this embodiment, the carbon emission reduction of producing silicon fertilizer products using high-silicon iron tailings is 6.386 million tCO2.

[0120] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A method for calculating carbon emission reduction from agricultural utilization of tailings, characterized in that: The following steps are involved: S1. Determine the baseline for agricultural utilization of tailings and identify the baseline emission sources; S2. Obtain the characteristic data and carbon emission factors of baseline carbon emissions, and establish a baseline carbon emission database for agricultural utilization of tailings; S3. Calculate the baseline carbon emissions of agricultural utilization of tailings based on the baseline carbon emissions database of agricultural utilization of tailings; S4. Identify carbon emission sources from agricultural use of tailings; S5. Obtain characteristic data and carbon emission factor data during the agricultural utilization of tailings, and establish a database of carbon emissions from agricultural utilization of tailings; S6. Calculate the carbon emissions from agricultural utilization of tailings according to the database of carbon emissions from agricultural utilization of tailings; S7. Calculate the carbon emission reduction from agricultural utilization of tailings based on the carbon emissions from agricultural utilization of tailings and the baseline carbon emissions.

2. The method for calculating carbon emission reduction from agricultural utilization of tailings according to claim 1, characterized in that: The tailings include single metal iron tailings of high silicon type, high aluminum type and high calcium and magnesium type; The agricultural utilization of tailings refers to the production of agricultural utilization products using tailings, and the agricultural utilization products include mineral fertilizers, improvers and matrix soil; The baseline for agricultural utilization of tailings refers to the conventional production process of the agricultural utilization product.

3. The method for calculating carbon emission reduction from agricultural utilization of tailings according to claim 1, characterized in that: The carbon emission sources from agricultural utilization of tailings and the baseline carbon emission sources include the upstream raw material mining and selection process, raw material transportation process, energy consumption in the product manufacturing process, and product production process.

4. The method for calculating carbon emission reduction from agricultural utilization of tailings according to claim 1, characterized in that: The baseline carbon emissions from agricultural utilization of tailings in S3 are the carbon emissions generated by agricultural utilization products per unit weight of conventional production, and the calculation methods include energy consumption limit method and classification method.

5. The method for calculating carbon emission reduction from agricultural utilization of tailings according to claim 4, characterized in that: The calculation method of the baseline carbon emissions from agricultural utilization of tailings using the energy consumption limit method is as follows: In the formula, BCE ta Baseline carbon emissions per ton of agricultural products produced using tailings, tCO2 / t; ECL im The consumption limit of the i-th type of energy in the m-th production link for every ton of product produced, Mwh / t, t / t or Nm 3 / t;CEF i is the carbon emission factor of the i-th energy source, t CO2 / Mwh, t CO2 / t or t CO2 / Nm 3 ;ω m is the weight conversion coefficient between the product and the mineral material in the mth production link; PCL is the power consumption limit, Mwh / t; ECEF is the power carbon emission factor, t CO2 / Mwh; FCL j Non-electricity consumption limit, i.e. fossil fuel consumption limit, t / t or Nm 3 / t;FCEF j is the carbon emission factor of fossil fuels, tCO2 / t or tCO2 / Nm 3 ;ECL t is the energy consumption limit for every ton of product produced, t standard coal / t; PCR is the proportion of electricity consumption in the energy consumption limit, dimensionless; EEF is the carbon emission factor of electricity, t CO2 / t standard coal; FEF is the average carbon emission factor of non-electric energy, t CO2 / t standard coal; BCE te Baseline carbon emissions caused by the product production process, tCO2 / t.

6. The method for calculating carbon emission reduction from agricultural utilization of tailings according to claim 4, characterized in that: The calculation method of the baseline carbon emissions from agricultural utilization of tailings is as follows: BCE ta =BCE ex +BCE tr +BCE pr +BCE te In the formula, BCE ta Baseline carbon emissions per ton of agricultural products produced using tailings, tCO2 / t; BCE ex Baseline carbon emissions from upstream raw material mining and selection, tCO2 / t; BCE tr is the baseline carbon emissions generated by the transportation of raw materials, tCO2 / t; BCEpr is the baseline carbon emissions generated by energy consumption in the product manufacturing process, tCO2 / t; BCE te Baseline carbon emissions caused by the product production process, tCO2 / t.

7. The method for calculating carbon emission reduction from agricultural utilization of tailings according to claim 1, characterized in that: The carbon emissions from agricultural utilization of tailings in S6 are the carbon emissions generated by producing agricultural utilization products per unit weight using tailings, and the calculation methods include emission reduction coefficient method and classification method; The calculation method of carbon emissions from agricultural utilization of tailings using the emission reduction coefficient method is as follows: PCE ta =BCE ta ×(1-b) Where PCE ta Carbon emissions per ton of agricultural products produced using tailings, tCO2 / t; BCE ta is the baseline carbon emissions per ton of agricultural products produced from tailings, tCO2 / t; β is the carbon emission reduction coefficient per ton of agricultural products produced from tailings.

8. The method for calculating carbon emission reduction from agricultural utilization of tailings according to claim 7, characterized in that: The calculation method of carbon emissions from agricultural utilization of tailings using the classification method is as follows: PCE ta =PCE ex +PCE tr +PCE pr +PCE te Where PCE ex is the carbon emissions generated by the upstream raw material mining process, tCO2 / t; PCE tr is the carbon emissions generated during the transportation of raw materials, tCO2 / t; PCEpr is the carbon emissions generated by energy consumption during the product manufacturing process, tCO2 / t; PCE te It is the carbon emission caused by the product production process, tCO2 / t.

9. The method for calculating carbon emission reduction from agricultural utilization of tailings according to claim 1, characterized in that: The calculation method of carbon emission reduction of tailings agricultural utilization is as follows: AND tι =ET×PC ι ETA=BCE ta -PCE ta Where, ETA tl is the carbon emission reduction of using tailings to produce agricultural products in the first year, tCO2; ETA is the carbon emission reduction of using tailings to produce 1 ton of agricultural products, tCO2 / t; PC l The output of agricultural products produced by tailings in the first year, t; PCE ta Carbon emissions per ton of agricultural products produced using tailings, tCO2 / t; BCE ta Baseline carbon emissions per ton of agricultural products produced from tailings, tCO2 / t.

10. A carbon emission reduction accounting system for agricultural utilization of tailings, characterized in that: The carbon emission reduction accounting method for agricultural utilization of tailings according to any one of claims 1 to 9 is used to perform carbon emission reduction accounting for agricultural utilization of tailings, and the carbon emission reduction accounting system for agricultural utilization of tailings includes a carbon emission source identification module, a carbon emission database establishment module, a carbon emission calculation module and a carbon emission reduction summary module; The carbon emission source identification module includes a tailings agricultural utilization carbon emission source identification unit and a tailings agricultural utilization baseline carbon emission source identification unit; The carbon emission database establishment module includes a tailings agricultural utilization carbon emission database establishment unit and a tailings agricultural utilization baseline carbon emission database establishment unit; The carbon emission calculation module includes a tailings agricultural utilization carbon emission calculation unit and a tailings agricultural utilization baseline carbon emission calculation unit.

Images