Carbon emission accounting method and system in soil remediation process

Abstract

The invention discloses a carbon emission accounting method and system in a soil remediation process, and the method comprises the steps: systematically defining an accounting boundary, dividing and recognizing various emission sources and the types of greenhouse gases generated by the emission sources in detail, building a carbon emission accounting model, and strictly guaranteeing the integrity and accuracy of data. Therefore, the accurate accounting of the total carbon emission in the soil remediation process and the quantitative analysis of the contribution rate of each emission source are realized. According to the method, the carbon emission condition in the soil remediation process can be intuitively calculated, the contribution rate of each emission source in the soil remediation process can be determined, the high emission link in the remediation process can be identified and regulated, and the goal of green remediation is achieved.

Description

Technical Field

[0001] The present application relates to the field of environmental protection technology, and in particular to a method and system for calculating carbon emissions during soil remediation. Background Art

[0002] The current global total carbon emissions continue to rise, and this severe situation is posing a severe challenge to the earth's ecosystem. The chain reactions caused by carbon emissions include but are not limited to: the continuous rise in temperature caused by global warming, the frequent occurrence of extreme weather events, the continuous rise in sea levels posing a threat to the survival and safety of coastal areas, the serious damage to the ecosystem leading to a sharp decline in biodiversity, and a significant increase in public health risks, such as frequent respiratory diseases and heat stroke. In addition, carbon emissions have also brought immeasurable economic losses and posed a major obstacle to the sustainable development of the social economy.

[0003] There are various standards for classifying carbon emissions. Taking the directness of the emission source as an example, it can be divided into direct emissions and indirect emissions. Direct emissions mainly come from the activities of the enterprise or system itself, such as carbon emissions generated by the combustion of fossil fuels; indirect emissions are caused by the consumption of external energy such as electricity and heat purchased by the enterprise or system. Depending on the type of emission, carbon emissions can be further subdivided into material emissions, energy consumption emissions and material consumption emissions. Material emissions refer to greenhouse gases directly released during the production process, energy consumption emissions come from energy consumption, and material consumption emissions involve the transportation and storage of raw materials and resource consumption in production. This multi-dimensional classification method helps to more comprehensively evaluate the sources and characteristics of carbon emissions and provides a scientific basis for formulating targeted emission reduction measures.

[0004] In the soil remediation industry, the issue of carbon emissions cannot be ignored either. The high energy consumption of soil remediation technology leads to the emission of a large amount of carbon dioxide. The activity of microorganisms during the bioremediation process may also produce greenhouse gases such as methane, and soil disturbance will release stored organic carbon. Therefore, while soil remediation is controlling pollution, it also faces the urgent need to optimize technology and develop environmentally friendly processes to reduce carbon emissions and reduce secondary impacts on the environment. However, the current soil remediation industry has not yet established an effective carbon emissions accounting system, and lacks accounting models and methods to accurately calculate and predict carbon emissions, which undoubtedly limits the low-carbon development process of the soil remediation industry. Therefore, the development of a carbon emission accounting method suitable for the soil remediation process is of great significance to promoting the green transformation and sustainable development of the soil remediation industry. Summary of the invention

[0005] The embodiments of the present application solve the technical problem of the lack of an accounting method in the soil remediation industry by providing a method and system for calculating carbon emissions during soil remediation. The present invention can intuitively calculate the carbon emissions during the remediation process, determine the contribution rate of each emission source, identify and regulate the high-emission links during the remediation process, and achieve the goal of green remediation.

[0006] In order to achieve the above object, the technical solution of the embodiment of the present invention is:

[0007] In the first aspect, an embodiment of the present invention provides a method for carbon emission accounting in a soil remediation process, including: determining the boundary of a carbon emission accounting system in a soil remediation process, the boundary is used to define the accounting scope, the accounting scope includes carbon emissions generated by soil remediation sites and remediation facilities, and the remediation facilities include direct remediation systems and auxiliary remediation systems; according to the remediation technology used in the soil remediation process, determining the type of carbon emission source within the accounting scope; according to the determined carbon emission source type, constructing a carbon emission accounting model in the soil remediation process; based on the carbon emission accounting model, collecting accounting data sets corresponding to each carbon emission source; the accounting data sets include activity levels and emission factor data of each emission source in the soil remediation process; and calculating the carbon emissions in the soil remediation process and the contribution rate of each carbon emission source based on the collected accounting data sets.

[0008] In some possible implementations, the direct remediation system includes crushing, stirring, heating, chemical addition and tail gas treatment; the auxiliary remediation system includes a ventilation system, a transportation system, a drainage system serving the direct remediation system, as well as the power, electricity supply and water supply systems of the remediation system.

[0009] In some possible implementations, carbon emission source types include, but are not limited to, carbon emissions from fuel combustion, carbon emissions from decomposition of organic pollutants, carbon emissions from decomposition of soil organic carbon, carbon emissions from remediation agents, and carbon emissions implied by net purchased electricity and heat.

[0010] In some possible implementations, the carbon emission accounting model is expressed as the sum of carbon emissions from various carbon emission sources; wherein the carbon emissions from fuel combustion are expressed as:

[0011]

[0012] in, is the carbon emission from fuel combustion, a is the type of fossil fuel, and an is the number of types of fossil fuels; AD a The consumption of fossil fuel type a for fuel combustion; AC a The carbon content of fossil fuel type a is expressed in tons of carbon per ton of fuel for solid or liquid fuels and tons of carbon per 10,000 Nm2 for gaseous fuels. 3 Unit: OF a is the carbon oxidation rate of fossil fuel a; Aa is the uncertainty factor of fossil fuel type a; 44 / 12 is the molecular weight conversion coefficient of CO2 and carbon; the carbon emission from the decomposition of organic pollutants is expressed as:

[0013]

[0014] in, is the carbon emission from the decomposition of organic pollutants, b is the type of organic pollutants, and bn is the number of types of organic pollutants; BD b is the total content of organic pollutants b, in tons; η b is the decomposition rate of organic pollutant b; BC b is the carbon content of organic pollutant b; B b is the uncertainty factor of the decomposition of organic pollutant b; the carbon emission from the decomposition of soil organic carbon is expressed as:

[0015]

[0016] in, is the carbon emission from soil organic carbon decomposition, CD is the total amount of soil organic carbon, in tons; η c is the soil organic carbon decomposition rate; C is the uncertainty factor of organic carbon decomposition; the carbon emission produced by the remediation agent is expressed as:

[0017]

[0018] in, To repair the carbon emissions generated by the agent, E 分解 To repair the carbon emissions generated by the decomposition of the agent itself, E 生产运输 It is the carbon emissions generated during the production and transportation of the repair agent; the calculation formula for the carbon emissions generated by the decomposition of the repair agent is expressed as:

[0019]

[0020] Among them, E 分解 is the carbon emission generated by the decomposition of the repair agent itself; d is the type of repair agent, dn is the number of types of repair agents; DD d is the amount of repair agent d added, in tons; η d is the decomposition rate of the repair agent d; PUR d is the purity expressed by the mass fraction of the dth repair agent; DC d is the carbon content of the repair agent d; d is the uncertainty factor of the decomposition of the repair agent d; the carbon emissions caused by the production and transportation of the repair agent are expressed as:

[0021]

[0022] Among them, E 生产运输 Carbon emissions generated by the production and transportation of repair agents; EF d is the carbon emission factor of the repair agent d; E d is the uncertainty factor of the production and transportation of repair agent d; the carbon emissions implied by the net purchased electricity are expressed as:

[0023]

[0024] The carbon emissions embodied in net purchased heat are expressed as:

[0025]

[0026] in, The carbon emissions embodied in the net purchase of electricity, The carbon emissions embodied in the net purchase of heat, AD 电力 is the net purchased electricity consumption, in MWh; U 电力 is the uncertainty factor of net purchased electricity; AD 热力 is the net purchased heat consumption, in GJ; EF 电力 EF is the carbon emission factor of electricity supply, in tons CO2 / MWh; 热力 is the carbon emission factor of heat supply, in tons CO2 / GJ; U 热力 is the uncertainty factor for net purchased electricity.

[0027] In some possible implementations, the carbon emissions in the soil remediation process and the contribution rate of each carbon emission source are calculated based on the collected accounting data set, including: calculating the carbon emissions of each carbon emission source according to the activity level and emission factor data of each carbon emission source; calculating the total carbon emissions in the soil remediation process according to the carbon emissions of each carbon emission source; calculating the contribution rate of each carbon emission source according to the carbon emissions of each carbon emission source and the total carbon emissions.

[0028] In some possible implementations, the contribution rate of each carbon emission source is expressed as:

[0029]

[0030] Among them, C i is the contribution rate of the ith carbon emission source; is the emission of the ith carbon emission source; E GHG is the total carbon emissions during soil remediation.

[0031] In some possible implementations, the carbon emissions in the soil remediation process and the contribution rate of each carbon emission source are calculated based on the collected accounting data set, including: classifying each carbon emission source according to a preset classification type, and calculating the carbon emissions of each classification type; calculating the contribution rate of each classification type based on the carbon emissions of each classification type and the total carbon emissions.

[0032] In the second aspect, an embodiment of the present invention provides a system for carbon emission accounting during soil remediation, which is used to implement the carbon emission accounting method during soil remediation provided in the first aspect, including: a data acquisition module, which is used to collect carbon emission-related data generated by each carbon emission source during the soil remediation process, at least including collecting the activity level and emission factor of each carbon emission source; a carbon emission calculation module, based on the collected original data, using a built-in carbon emission accounting model to accurately calculate the carbon emissions; an accounting result analysis module, which is used to calculate the contribution rate of each carbon emission source; a data visualization module, which is used to provide intuitive visualization functions and display complex carbon emission data in the form of charts, curves or heat maps.

[0033] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0034] One or more technical solutions are provided in the embodiments of the present invention, which have at least the following technical effects or advantages:

[0035] In the embodiment of the present invention, by systematically defining the accounting boundaries in the soil remediation process, dividing and identifying various emission sources and the types of gases they produce in detail, establishing a carbon emission accounting model, and strictly ensuring the integrity and accuracy of the data, the total carbon emissions and the contribution rate of each emission source are quantitatively analyzed. This method can intuitively calculate the carbon emissions in the soil remediation process, help determine the contribution rate of each emission source, identify and regulate the high-emission links in the remediation process, and achieve the goal of green remediation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0037] Figure 1 A schematic flow chart of an embodiment of a method for calculating carbon emissions in a soil remediation process provided for the implementation of the present invention;

[0038] Figure 2 Schematic diagram of the carbon emission accounting framework in the soil remediation process according to an embodiment of the present invention

[0039] Figure 3 Schematic diagram of the structure of a system for carbon emission accounting in soil remediation process in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] In the relevant description of this embodiment, the terms "including, containing, having" and the like are open terms and are generally understood to include but not be limited to; the term "at least one" is generally understood to mean one or more, where "plurality" refers to two or more; the term "at least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items, for example, "at least one of a, b or c", or "at least one of a, b and c", can all represent: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, c can be single or multiple, respectively; the symbol "A / B" is used to describe the selection relationship of associated objects, generally indicating an "or" relationship before and after.

[0042] In the following description of the present embodiment, the terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0043] Those skilled in the art should understand that in the following description of the embodiments of the present application, the order of serial numbers does not mean the order of execution, some or all of the steps can be executed in parallel or sequentially, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0044] Those skilled in the art will appreciate that the numerical ranges in the embodiments of the present application are to be construed as also specifically disclosing each intermediate value between the upper and lower limits of the scope. Each smaller range between the intermediate value in any stated value or stated range and any other stated value or intermediate value in the range is also included in the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded in the scope.

[0045] Unless otherwise specified, the technical / scientific terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs. Although this application only describes preferred methods and materials, any methods and materials similar or equivalent to these may also be used in the implementation or testing of this application. All documents mentioned in this specification are incorporated by reference to disclose and describe methods and / or materials related to the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0046] In order to illustrate the technical solution of the present invention, specific embodiments are provided below for illustration.

[0047] The current global total carbon emissions continue to rise, and this severe situation is posing an unprecedented challenge to the earth's ecosystem. The chain reactions caused by carbon emissions include but are not limited to: the continued rise in temperature caused by global warming, the frequent occurrence of extreme weather events, the continuous rise in sea levels that pose a direct threat to the survival and safety of coastal areas, the serious damage to the ecosystem leading to a sharp decline in biodiversity, and a significant increase in public health risks, such as the frequent occurrence of respiratory diseases and heat stroke. In addition, carbon emissions have also brought immeasurable economic losses, posing a major obstacle to the sustainable development of the social economy.

[0048] There are various standards for classifying carbon emissions. Taking the directness of the emission source as an example, it can be divided into direct emissions and indirect emissions. Direct emissions mainly come from the activities of the enterprise or system itself, such as carbon emissions generated by the burning of fossil fuels; indirect emissions are caused by the consumption of external energy such as electricity and heat purchased by the enterprise or system. Depending on the type of emission, carbon emissions can be further subdivided into material emissions, energy consumption emissions and material consumption emissions. Material emissions refer to greenhouse gases released directly during the production process, energy consumption emissions come from energy consumption, and material consumption emissions involve the transportation and storage of raw materials and resource consumption in production. This multi-dimensional classification method helps to more comprehensively evaluate the sources and characteristics of carbon emissions and provides a scientific basis for formulating targeted emission reduction measures.

[0049] In the soil remediation industry, the issue of carbon emissions cannot be ignored either. The high energy consumption of soil remediation technology leads to a large amount of carbon dioxide emissions. At the same time, microorganisms may also produce greenhouse gases such as methane during the bioremediation process, and soil disturbance will release stored organic carbon. These factors may lead to carbon emissions. Therefore, while soil remediation is controlling pollution, it also faces the urgent need to optimize technology and develop environmentally friendly processes to reduce carbon emissions and reduce secondary impacts on the environment. However, the current soil remediation industry has not yet established an effective carbon emissions accounting system, and lacks accounting models and methods to accurately calculate and predict carbon emissions, which undoubtedly limits the low-carbon development process of the soil remediation industry. Therefore, the development of a carbon emission accounting method suitable for the soil remediation process is of great significance to promoting the green transformation and sustainable development of the soil remediation industry.

[0050] Based on this, the embodiment of the present invention provides a method and system for calculating carbon emissions during soil remediation, which solves the technical problem of the lack of accounting methods in the soil remediation industry. The present invention can intuitively calculate the carbon emissions during soil remediation, help determine the contribution rate of each emission source, identify and regulate the high emission links in the remediation process, and achieve the goal of green remediation.

[0051] Figure 1 A schematic diagram of an embodiment of a method for calculating carbon emissions in a soil remediation process provided by the present invention, see Figure 1 As shown, the carbon emission accounting methods in the above soil remediation process may include:

[0052] S101, determine the boundaries of the carbon emission accounting system during soil remediation. The boundaries are used to define the accounting scope, which includes carbon emissions generated by soil remediation sites and remediation facilities. Remediation facilities include direct remediation systems and auxiliary remediation systems;

[0053] It should be noted that when establishing the boundaries of the carbon emission accounting system in the soil remediation process, the key is to clearly define the scope of the accounting, aiming to accurately cover the target area scope of carbon emissions generated by all ongoing soil remediation activities and related facilities. For example, the entire area responsible for the soil remediation company. The accounting target area covers the carbon emissions generated by all soil remediation sites and their related remediation facilities.

[0054] Among them, remediation facilities can be divided into two categories: direct remediation systems and auxiliary remediation systems. The direct remediation system includes key steps such as soil crushing, mixing, heating, chemical addition and tail gas treatment, all of which will produce carbon emissions. The auxiliary remediation system is used to support and serve the direct remediation system, including ventilation systems, transportation systems and drainage systems, etc. These auxiliary facilities will also produce carbon emissions.

[0055] In addition, in some embodiments, when setting the accounting boundary, some indirect carbon emission sources can be excluded. For example, the carbon emissions generated by the internal logistics activities of the enterprise, employees' business trips, the carbon emissions in the process of purchasing raw materials, the carbon emissions in the production management link, the carbon emissions of the sales system, and the carbon emissions generated by the life and electricity consumption in the residential area are all excluded from the accounting scope. The purpose of doing so is to ensure the accuracy and pertinence of the accounting and avoid including indirect carbon emissions in the accounting scope.

[0056] S102, determine the types of carbon emission sources within the accounting scope based on the remediation technology used in the soil remediation process;

[0057] During the soil remediation process, the remediation technologies used vary depending on the specific conditions of the contaminated site, such as the type of pollutants and soil type, which leads to differences in carbon emissions among the technologies.

[0058] Exemplarily, the types of carbon emission sources vary depending on the remediation technology, and may include, but are not limited to, carbon emissions from fuel combustion, carbon emissions from decomposition of organic pollutants, carbon emissions from decomposition of soil organic carbon, carbon emissions from remediation agents, and carbon emissions implied by net purchased electricity and heat.

[0059] Carbon emissions from fuel combustion refer to carbon emissions generated when fossil fuels are fully burned with oxygen in various types of fixed or mobile combustion equipment. The devices or equipment involved in fossil fuel combustion in the soil remediation process mainly include heating furnaces, kilns, forklifts, bulldozers, dump trucks, etc.

[0060] Carbon emissions from the decomposition of organic pollutants, carbon emissions from the thermal and oxidative decomposition of organic pollutants. Emissions from the decomposition of organic pollutants include tail gas treatment of gas phase extraction, heating and tail gas treatment of thermal desorption, eluent regeneration of leaching, oxidative decomposition of oxidative remediation, oxidative decomposition of microbial remediation, etc.

[0061] Carbon emissions from the decomposition of soil organic carbon, carbon emissions from the decomposition of organic carbon in the soil due to heat and oxidation. Soil remediation involves heating and oxidation processes, and soil organic carbon will decompose to varying degrees to produce carbon emissions.

[0062] Carbon emissions generated by remediation agents, carbon emissions generated during the production and transportation of oxidants, eluents and stabilizers added during soil remediation, and carbon emissions generated by the decomposition of the remediation agents themselves.

[0063] The carbon emissions implied by the net purchase of electricity and heat occur in enterprises that produce electricity or heat, but are caused by the main consumption activities of the soil remediation project. They are also included in the total emissions here in accordance with regulations.

[0064] In addition, in some embodiments, if, during the carbon emission accounting in the soil remediation process, it is found that there are other emission sources other than the types mentioned above within the accounting boundary, or other types of greenhouse gases other than carbon dioxide (such as methane, nitrous oxide, freon, etc.), then it is necessary to handle these additional emission sources and greenhouse gases more carefully and comprehensively. In order to ensure the accuracy and compliance of the accounting, the latest relevant industry guidelines or standards issued by the national competent authorities should be referred to. These guidelines will provide accounting methods, emission factors, data collection requirements, and reporting formats, etc., analyze and identify new emission sources, determine their emission characteristics and quantities, and use different accounting methods and emission factors for different types of greenhouse gases. For example, the emissions of methane and nitrous oxide may be related to certain specific processes or conditions in the soil remediation process, so special accounting is required for these processes or conditions.

[0065] S103, constructing a carbon emission accounting model in the soil remediation process according to the determined carbon emission source type;

[0066] In some embodiments, the carbon emission accounting model is expressed as the sum of carbon emissions from various carbon emission sources.

[0067] For example, the total carbon emissions during soil remediation are equal to the sum of the carbon emissions from the combustion of the above-mentioned fuels, the carbon emissions from the decomposition of organic pollutants, the carbon emissions from the decomposition of soil organic carbon, the carbon emissions generated by remediation agents, and the carbon emissions implied by the net purchase of electricity and heat.

[0068] For example, the total carbon emissions during soil remediation can be expressed as:

[0069]

[0070] Among them, E GHG is the total carbon emissions during soil remediation; Carbon emissions from fuel combustion; Carbon emissions from the decomposition of organic pollutants; is the carbon emission from the decomposition of soil organic carbon; Carbon emissions generated for repairing the agent; Emissions of carbon embodied in net purchased electricity; It is the carbon emissions embodied in the net purchased heat, in tonnes.

[0071] In some embodiments, carbon emissions from fuel combustion are calculated based on the amount of fossil fuel burned by type, the carbon content per unit fuel, and the carbon oxidation rate.

[0072] For example, the carbon emissions from fuel combustion are expressed as:

[0073]

[0074] in, is the carbon emission from fuel combustion, a is the type of fossil fuel, and an is the number of types of fossil fuels; AD a The consumption of fossil fuel type a for fuel combustion; AC a The carbon content of fossil fuel type a is expressed in tons of carbon per ton of fuel for solid or liquid fuels and tons of carbon per 10,000 Nm2 for gaseous fuels. 3 Unit: OF a is the carbon oxidation rate of fossil fuel a; A a is the uncertainty factor of fossil fuel type a; 44 / 12 is the molecular weight conversion coefficient of CO2 and carbon;

[0075] In some embodiments, the carbon emissions from the decomposition of organic pollutants are the carbon emissions generated by the thermal and oxidative decomposition of organic pollutants, which can be calculated based on the total content of organic pollutants, the decomposition rate and the carbon content.

[0076] Exemplarily, the carbon emissions from the decomposition of organic pollutants are expressed as:

[0077]

[0078] in, is the carbon emission from the decomposition of organic pollutants, b is the type of organic pollutants, and bn is the number of types of organic pollutants; BD b is the total content of organic pollutants b, in tons; η b is the decomposition rate of organic pollutant b; BC b is the carbon content of organic pollutant b; B b is the uncertainty factor for the decomposition of organic pollutant b;

[0079] In some embodiments, carbon emissions from soil organic carbon decomposition are carbon emissions from thermal and oxidative decomposition of soil organic carbon, which can be calculated based on the total amount of soil organic carbon and the decomposition rate.

[0080] Exemplarily, the carbon emission from soil organic carbon decomposition is expressed as:

[0081]

[0082] in, is the carbon emission from soil organic carbon decomposition, CD is the total amount of soil organic carbon, in tons; η c is the soil organic carbon decomposition rate; C is the uncertainty factor of organic carbon decomposition;

[0083] In some embodiments, the carbon emissions generated by the repair agent include the carbon emissions generated during the production and transportation of the repair agent (such as oxidants, reducing agents, etc.) and the carbon emissions generated by the decomposition of the repair agent itself.

[0084] Exemplarily, the carbon emissions generated by the repair agent are expressed as:

[0085]

[0086] in, To repair the carbon emissions generated by the agent, E 分解 To repair the carbon emissions generated by the decomposition of the agent itself, E 生产运输 To repair the carbon emissions generated during the production and transportation of the agent;

[0087] The carbon emissions generated by the decomposition of the repair agent can be calculated based on the amount of the repair agent added, the decomposition rate, the purity of the repair agent and the carbon content of the repair agent.

[0088] Exemplarily, the calculation formula for the carbon emissions generated by the decomposition of the repair agent is expressed as:

[0089]

[0090] Among them, E 分解 is the carbon emission generated by the decomposition of the repair agent itself; d is the type of repair agent, dn is the number of types of repair agents; DD d is the amount of repair agent d added, in tons; η d is the decomposition rate of the repair agent d; PUR d is the purity expressed by the mass fraction of the dth repair agent; DC d is the carbon content of the repair agent d; d The uncertainty factor for the decomposition of the repair agent d;

[0091] The carbon emissions caused by the production and transportation of repair agents are expressed as:

[0092]

[0093] Among them, E 生产运输 Carbon emissions generated by the production and transportation of repair agents; EF d is the carbon emission factor of the repair agent d; E d To repair the uncertainty factor in the production and transportation of drug d;

[0094] In some embodiments, the carbon emissions embodied in the net purchased electricity of the restoration project entity are expressed as:

[0095]

[0096] In some embodiments, the carbon emissions embodied in the net purchased heat of the restoration project entity are expressed as:

[0097]

[0098] in, The carbon emissions embodied in the net purchase of electricity, The carbon emissions embodied in the net purchase of heat, AD 电力 is the net purchased electricity consumption, in MWh; U 电力 is the uncertainty factor of net purchased electricity; AD 热力 is the net purchased heat consumption, in GJ; EF 电力 EF is the carbon emission factor of electricity supply, in tons CO2 / MWh; 热力 is the carbon emission factor of heat supply, in tons CO2 / GJ; U 热力 is the uncertainty factor for net purchased electricity.

[0099] In some embodiments, uncertainty analysis can be performed on each carbon emission source to determine the uncertainty factor for evaluating and quantifying each carbon emission source. It should be noted that uncertainty refers to the errors and deviations between the accounting results and the actual emissions due to the influence of multiple factors such as imprecise data, method selection, model assumptions, etc. in the accounting process. These uncertainties reflect the limitations of carbon emission data itself, the limitations of measurement technology, and the influence of subjective assumptions in the modeling and extrapolation process. By adopting uncertainty quantification methods, the sources of errors in the accounting process can be more clearly understood and analyzed.

[0100] Conduct uncertainty analysis to identify and quantify various uncertainties that may arise in the process of estimating and predicting carbon emissions. Methods for quantifying uncertainty include the following aspects. Uncertainty is quantified through statistical confidence intervals, and the average value of the data is expressed in a certain percentage range, such as "100 tons ± 5%". The specific calculation steps include selecting the confidence level and determining the t value. The confidence level directly affects the range of the confidence interval, and a confidence level of 95% to 99.73% is usually selected to ensure the reliability of the results. For example, a confidence level of 95% is used in the embodiment of the present invention. The t value is used to calculate the width of the confidence interval, which depends on the number of samples. Smaller sample sizes require larger t values ​​to compensate for the uncertainty caused by small samples.

[0101] In the accounting process, the assessment and transfer of uncertainty can be carried out step by step according to the actual situation, and the appropriate transfer method can be selected according to the specific operation type. First, within each accounting unit, the uncertainty of the input quantity can be evaluated based on the accounting model. When the calculation within the unit involves multiplication or division, the corresponding error transfer method can be used to quantify the uncertainty of the calculation result. Secondly, for each accounting item in the accounting system, when they are combined in the form of addition or subtraction, the error transfer method of addition operation can be used to determine the comprehensive uncertainty between items. This step integrates the uncertainty of the unit result into the accounting item to form an independent uncertainty for each item. Finally, when it is necessary to integrate the results of all accounting units, the calculation results of each unit can be comprehensively processed according to the error transfer method of addition operation to obtain the uncertainty of the final result. Through this layer-by-layer transfer method, the effective transfer of uncertainty from unit to item and then to the whole can be ensured, and the reliability and scientificity of the accounting results can be guaranteed.

[0102] When multiple environments need to evaluate uncertainty, the final summary stage needs to merge the uncertainty. The uncertainty merging method uses the error propagation formula, including the error propagation formula for addition and subtraction operations and the error propagation formula for multiplication and division operations. For example, the error propagation formula for addition and subtraction operations can be expressed as:

[0103]

[0104] Where U c is the uncertainty of the sum or difference of n calculated values; U s1 …U sn is the uncertainty of n calculated values ​​added and subtracted; μ s1 …μ sn It is the calculation value of n additions and subtractions.

[0105] The error propagation formula for multiplication and division operations can be expressed as:

[0106]

[0107] Where U c is the uncertainty of the product of n calculated values; U s1 …U sn is the uncertainty of n calculated values ​​added and subtracted; μ s1 …μ sn It is the calculation value of n additions and subtractions.

[0108] S104, based on the carbon emission accounting model, collect the accounting data set corresponding to each carbon emission source; the accounting data set includes the activity level and emission factor data of each emission source in the soil remediation process;

[0109] Among them, activity data reflects the activity intensity or scale of emission sources and is the basis for calculating carbon emissions. For example, for the emission source of fuel consumption of mechanical equipment, activity data may include the operating time, power consumption or fuel consumption of each equipment.

[0110] Emission factor data refers to the amount of carbon emissions generated per unit activity level, which reflects the efficiency or proportion of a specific activity or substance converted into carbon emissions. Emission factors may vary depending on the technology, equipment, fuel type or chemical agent used. Therefore, it is necessary to collect or refer to the latest and most accurate emission factor data provided in national, industry or international standards. If standard data is not applicable in a specific case, it may be necessary to obtain more accurate emission factors through experimental determination or consultation with experts.

[0111] For example, The acquisition of activity level data of fossil fuel combustion of sub-categories is determined based on the original records or statistical ledgers of energy consumption. The measurement of fuel consumption should comply with the conventional requirements in this field. The acquisition of carbon emission factors includes: the carbon content of fossil fuels can be tested regularly by itself or by entrusting a qualified professional organization. The oil products can be tested once when each batch of fuel enters the factory or once every quarter, and the arithmetic mean is taken as the carbon content of the oil product;

[0112] For gaseous fuels such as natural gas, the gas components can be tested at least once every six months when each batch of fuel enters the factory, and then the carbon content is calculated based on the volume concentration of each gas component and the number of carbon atoms in the chemical formula of the component, which can be expressed as:

[0113]

[0114] Among them, CC ig is the carbon content of the gas to be tested, in tons of carbon / 10,000 Nm 3 ; n is the various gas components of the gas to be measured; CN n is the number of carbon atoms in the chemical formula of gas component n; V n is the volume concentration of gas component n (0-1); 12 is the molar mass of carbon, in kg / kmol; 22.4 is the molar volume of ideal gas under standard conditions, in Nm 3 / kmol.

[0115] In addition, the low calorific value of the fuel can also be tested regularly, and the carbon content of the fuel can be estimated according to the following formula.

[0116] CC i =NCV i ×EF i ,

[0117] Among them, CC iis the carbon content of fossil fuel type i; NCV i is the lower calorific value of fossil fuel type i, in GJ / ton for solid and liquid fuels and GJ / 10,000 Nm2 for gaseous fuels 3 EF i It is the carbon content per unit calorific value of fossil fuel type i, in tons of carbon / GJ.

[0118] Fuel carbon oxidation rate OF i Depending on the fuel type, the carbon oxidation rate of liquid fuel can be 0.98; the carbon oxidation rate of gas fuel can be 0.99; solid fuel is selected according to its type.

[0119] The total content of organic pollutants can be determined based on on-site surveys, test data or statistical reports. The decomposition rate of organic pollutants should be based on monitoring data. If there is no monitoring data, 100% can be taken.

[0120] The total amount of soil organic carbon can be determined based on on-site surveys, test data or statistical reports. The soil organic carbon decomposition rate should be based on monitoring data. If there is no monitoring data, it can be taken as 100%.

[0121] The amount of remediation agent used can be determined based on the company's ledger or statistical report. The decomposition rate of the remediation agent should be determined based on the type of equipment actually used by the company, the residue in the soil and the remediation monitoring data. If there is no monitoring data, 100% can be used.

[0122] The net purchased electricity consumption can be based on the meter readings or energy consumption ledgers or statistical reports settled by the power grid company, which is equal to the net difference between the purchased electricity and the external power supply. The carbon emission factor of the power supply can be the average carbon emission factor of the power grid to which the soil remediation site belongs.

[0123] The net purchased heat consumption is based on the heat purchase and sale settlement certificate or energy consumption ledger or statistical report, which is equal to the difference between the total heat of steam and hot water purchased and the total heat of steam and hot water supplied from outside. It can be converted and calculated using the following formula.

[0124] AD 热力 =AD 热水 +AD 蒸汽 ,

[0125] Among them, AD 热水 AD is the heat contained in hot water; 蒸汽 is the heat of steam, in GJ. The hot water measured in mass units can be converted into heat units by the following formula:

[0126] AD热水 =Ma w ×(T w -20)×4.1868×10 -3 ,

[0127] Among them, Ma w is the mass of hot water, in tons; T w is the hot water temperature, in °C; 4.1868 is the specific heat of water at room temperature and pressure, in kJ / (kg·°C).

[0128] Alternatively, steam measured in mass units can be converted to thermal units using the following formula:

[0129] AD 蒸汽 =Ma st ×(En st -83.74)×10 -3 ,

[0130] Among them, Ma st is the mass of steam in tons; En st It is the enthalpy value of each kilogram of steam at the temperature and pressure corresponding to the steam; 83.74 is the enthalpy value of water at 20°C under standard atmospheric pressure, and the unit is kJ / kg.

[0131] It should be noted that the carbon emission factor of heat supply can be calculated as 0.11 tons CO2 / GJ, and can be updated in the future based on official data released by the competent authorities.

[0132] S105, calculating the carbon emissions during the soil remediation process and the contribution rate of each carbon emission source based on the collected accounting data set.

[0133] In some embodiments, the above step S105 may include:

[0134] S1051, calculate carbon emissions based on the activity level and emission factor data of each carbon emission source;

[0135] S1052, calculating the total carbon emissions during soil remediation based on the carbon emissions of each carbon emission source;

[0136] S1053, calculating the contribution rate of each carbon emission source based on the carbon emission of each carbon emission source and the total carbon emissions.

[0137] Specifically, after all necessary activity level data and emission factor data are collected in step S104, the carbon emission accounting model is used to calculate the carbon emissions of each emission source by multiplying the activity level by the corresponding emission factor and uncertainty factor. Then, the carbon emissions of all emission sources are added together to obtain the total carbon emissions of the soil remediation project.

[0138] After that, calculate the contribution rate of each carbon emission source. The contribution rate refers to the proportion of carbon emissions from a certain emission source to the total carbon emissions. By calculating the ratio of carbon emissions from each emission source to the total carbon emissions, the contribution rate of each emission source can be obtained. The contribution rate calculation helps to identify the main carbon emission sources, thus providing an important basis for formulating emission reduction strategies.

[0139] In some embodiments, before calculating the total carbon emissions and contribution rate, the acquired data set needs to be checked for integrity to ensure that the data content is complete and there are no missing or errors. If the integrity check passes, the validity check will continue to verify the accuracy and rationality of the data. If the integrity check fails, the data needs to be re-collected or sorted until the data meets the integrity requirements, and then the validity check will be performed to ensure that the data meets the expected standards and logic.

[0140] In some embodiments, the contribution rate of each carbon emission source can be expressed as:

[0141]

[0142] Among them, C i is the contribution rate of the ith carbon emission source; is the emission of the ith carbon emission source; E GHG is the total carbon emissions during soil remediation.

[0143] In some embodiments, the above step S105 may also include the following steps:

[0144] Classify each carbon emission source according to the preset classification type and calculate the carbon emissions of each classification type;

[0145] The contribution rate of each classification type is calculated based on the carbon emissions of each classification type and the total carbon emissions.

[0146] For example, greenhouse gas emissions accounting can usually be divided into three categories: material emissions, energy consumption emissions, and material consumption emissions. Material emissions refer to greenhouse gas emissions directly released during chemical reactions, natural decomposition of substances, fermentation or combustion. Energy consumption emissions are related to energy consumption, and refer to greenhouse gas emissions generated by burning fossil fuels, using electricity and other energy sources during production or work. Material consumption emissions are greenhouse gas emissions related to material consumption, covering the entire life cycle from material production, transportation, use to waste disposal. Calculated according to the following formula:

[0147]

[0148] At this time, the contribution rate of each type is calculated based on the total carbon emissions during soil remediation. The calculation formula is:

[0149]

[0150] Among them, C j is the contribution rate of the jth type of emission source; is the emission of the jth type of emission source; E GHG is the total carbon emissions during soil remediation.

[0151] In addition, according to the directness of the emission source, carbon emissions can also be divided into direct emissions and indirect emissions. Direct emissions refer to carbon emissions generated by an enterprise or system in its own activities. Indirect emissions refer to carbon emissions caused by external energy consumption of an enterprise or system. Direct emissions and indirect emissions can be calculated according to the following formula:

[0152]

[0153] At this point, the contribution rate of each type based on the total carbon emissions during soil remediation can be expressed as:

[0154]

[0155] Among them, C g is the contribution rate of the g-type emission source; E is the emission of the g-type emission source; GHG is the total carbon emissions during soil remediation.

[0156] like Figure 2 As shown, in the embodiment of the present invention, the present invention is based on the existing theoretical framework, starting from multiple perspectives such as energy, agents and pollutants, comprehensively considering different types of carbon emission scenarios in the soil remediation process, and systematically constructing a theoretical framework for carbon emission accounting in the soil remediation process. By systematically defining the accounting boundaries, dividing and identifying various types of emission sources and the types of gases they produce in detail, establishing a carbon emission accounting model, and strictly ensuring the integrity and accuracy of the data, the accurate accounting of the total carbon emissions in the soil remediation process and the quantitative analysis of the contribution rate of each emission source are achieved. This method can more conveniently and directly calculate the carbon emissions in the soil remediation process, and help determine the contribution rate of each emission source in the soil remediation process, so as to achieve low-carbon management of the soil remediation process, identify and regulate the high-emission links in the remediation process, and achieve the goal of green remediation.

[0157] It should be noted that the method provided in the embodiment of the present invention can be applied to any soil remediation method, such as the elution method to repair soil contaminated by chloronitrotoluene. Alternatively, it can also be a chemical oxidation method to repair soil contaminated by heavy metals or organic pollutants. The chemical oxidation method is a method of adding strong oxidants, such as potassium permanganate, hydrogen peroxide, etc., to the soil to cause a chemical reaction with pollutants in the soil to convert the pollutants into harmless or low-toxic substances. Corresponding pollutants include: heavy metal pollutants, such as lead, cadmium, chromium, mercury, etc. Organic complex pollutants: such as polycyclic aromatic hydrocarbons, polychlorinated biphenyls, etc. In the embodiment of the present invention, the determined carbon emission source type can be adjusted accordingly based on different remediation methods.

[0158] For example, the elution method (elution agent is sodium dodecylbenzene sulfonate) is used to repair soil contaminated by nitrotoluene monochloride. Figure 2 As shown, firstly, the soil remediation process is analyzed, the accounting framework is constructed, and the boundary of the carbon emission accounting system is determined; the carbon emission accounting includes the carbon emissions generated by the soil remediation site and the remediation facilities. The scope of facilities includes direct remediation systems and auxiliary remediation systems. The carbon emissions generated by internal logistics, employee business trips, purchase of raw materials, production management, residential living energy consumption and electricity consumption are not considered.

[0159] Secondly, the carbon emission sources and gas types in the soil remediation process are determined, including carbon emissions implied by fuel combustion, decomposition of organic pollutants, decomposition of soil organic carbon, remediation agents, and net purchased electricity and heat.

[0160] Then, a carbon emission accounting model for the soil remediation process is constructed, which can be expressed as the sum of carbon emissions from fuel combustion, carbon emissions from decomposition of organic pollutants, carbon emissions from decomposition of soil organic carbon, carbon emissions from remediation agents, and carbon emissions implied by net purchased electricity and heat, and an uncertainty analysis is performed on the accounting process. The carbon emission accounting model is expressed as:

[0161]

[0162] This soil remediation process is an ex situ remediation process, and fuel combustion mainly comes from the earth excavation and transportation process. The carbon emissions from fuel combustion are expressed as:

[0163]

[0164] Carbon emissions from the decomposition of organic pollutants are the carbon emissions generated by the thermal and oxidative decomposition of nitrotoluene monochloride. It can be calculated based on the total content of nitrotoluene monochloride, the decomposition rate and its carbon content, using the following formula:

[0165]

[0166] Carbon emissions from soil organic carbon decomposition refer to the carbon emissions from the thermal and oxidative decomposition of soil organic carbon, which can be calculated based on the total amount of soil organic carbon and the decomposition rate. The formula is:

[0167]

[0168] The carbon emissions generated by the repair agent include the carbon emissions generated during the production and transportation of the repair agent (sodium dodecylbenzene sulfonate and hydrogen peroxide) and the carbon emissions generated by the decomposition of the repair agent itself. The formula is:

[0169]

[0170] The carbon emissions generated by the decomposition of sodium dodecylbenzene sulfonate can be calculated based on the amount of repair agent added, decomposition rate, purity and carbon content. The formula is:

[0171]

[0172] The calculation formula for carbon emissions caused by the production and transportation of sodium dodecylbenzene sulfonate and hydrogen peroxide is:

[0173]

[0174] The calculation formula for the carbon emissions implied by the net purchased electricity of the main body of the restoration project is:

[0175]

[0176] The calculation formula for the carbon emissions embodied in the net purchased heat of the main body of the restoration project is:

[0177]

[0178] The acquisition of activity level data of fossil fuel combustion of medium-sized varieties can be determined based on the original records of enterprise energy consumption or statistical ledgers. The measurement of fuel consumption should comply with the conventional requirements in this field. The acquisition of activity level data of fossil fuel combustion of medium-sized varieties can be determined based on the original records of enterprise energy consumption or statistical ledgers. The measurement of fuel consumption should comply with the conventional requirements in this field.

[0179] The acquisition of carbon emission factors includes: the carbon content of fossil fuels can be tested regularly by the company itself or by entrusting a qualified professional organization. For oil products, the test can be carried out once every quarter when each batch of fuel enters the factory, and the arithmetic mean value is taken as the carbon content of the oil product; for gas fuels such as natural gas, the gas components can be tested at least once every six months when each batch of fuel enters the factory, and then the carbon content is calculated based on the volume concentration of each gas component and the number of carbon atoms in the chemical formula of the component: it can be expressed as:

[0180]

[0181] Among them, CC ig is the carbon content of the gas to be tested, in tons of carbon / 10,000 Nm 3 ; n is the various gas components of the gas to be measured; CN n is the number of carbon atoms in the chemical formula of gas component n; V is the volume concentration of gas component n (0-1); 12 is the molar mass of carbon, in kg / kmol; 22.4 is the molar volume of an ideal gas under standard conditions, in Nm 3 / kmol.

[0182] In addition, you can also regularly test the low calorific value of the fuel and then estimate the carbon content of the fuel according to the following formula.

[0183] CC i =NCV i ×EF i ,

[0184] Among them, CC i is the carbon content of fossil fuel type i; NCV i is the lower calorific value of fossil fuel type i, solid and liquid fuels are expressed in GJ / ton, and gas fuels are expressed in GJ / 10,000 Nm 3 EF i It is the carbon content per unit calorific value of fossil fuel type i, in tons of carbon / GJ.

[0185] The carbon oxidation rate of the fuel can be: the carbon oxidation rate of liquid fuel can be 0.98; the carbon oxidation rate of gas fuel can be 0.99; solid fuel can be selected according to its type.

[0186] E CO2_有机污染物 The total content of organic pollutants can be determined based on on-site surveys, test data or statistical reports. The decomposition rate of organic pollutants should be based on monitoring data. If there is no monitoring data, 100% can be taken.

[0187] E CO2_土壤有机碳 The total amount of soil organic carbon can be determined based on on-site surveys, test data or statistical reports. The soil organic carbon decomposition rate should be based on monitoring data. If there is no monitoring data, it can be taken as 100%.

[0188] E CO2_修复药剂 The amount of remediation agent used can be determined based on the company's ledger or statistical report. The decomposition rate of the remediation agent should be determined based on the type of equipment actually used by the company, the residue in the soil and the remediation monitoring data. If there is no monitoring data, 100% can be used.

[0189] E CO2_净电The net purchased electricity consumption can be based on the meter readings or energy consumption ledgers or statistical reports settled by the power grid company, which is equal to the net difference between the purchased electricity and the external power supply. The carbon emission factor of the power supply can be the average carbon emission factor of the power grid to which the soil remediation site belongs.

[0190] E CO2_净热 The net purchased heat consumption is based on the heat purchase and sale settlement certificate or energy consumption ledger or statistical report, which is equal to the difference between the total heat of steam and hot water purchased and the total heat of steam and hot water supplied from outside. It can be converted and calculated using the following formula.

[0191] AD 热力 =AD 热水 +AD 蒸汽 ,

[0192] Among them, AD 热水 AD is the heat contained in hot water; 蒸汽 The heat of steam is measured in GJ. The hot water measured in mass units can be converted into heat units by the following formula:

[0193] AD 热水 =Ma w ×(T w -20)×4.1868×10 -3 ,

[0194] Among them, Ma w is the mass of hot water, in tons; T w is the hot water temperature, in °C; 4.1868 is the specific heat of water at room temperature and pressure, in kJ / (kg·°C).

[0195] Alternatively, steam measured in mass units can be converted to thermal units using the following formula:

[0196] AD 蒸汽 =Ma st ×(En st -83.74)×10 -3 ,

[0197] Among them, Ma st is the mass of steam in tons; En st is the enthalpy value of each kilogram of steam at the temperature and pressure corresponding to the steam; 83.74 is the enthalpy value of water at 20°C at standard atmospheric pressure, in kJ / kg. The carbon emission factor of heat supply can be calculated as 0.11 tons of CO2 / GJ.

[0198] The emission amount and contribution rate of each emission source in the process of leaching remediation of nitrotoluene monochloride contaminated soil can then be calculated based on the collected data set:

[0199] The contribution rate of each emission source is as follows:

[0200]

[0201] The emission of substances, energy consumption and material consumption in the process of soil remediation of nitrotoluene monochloride contaminated by leaching method is calculated according to the following formula:

[0202]

[0203] The contribution rate of each type is calculated based on the total carbon emissions during soil remediation. The calculation formula is:

[0204]

[0205] Direct and indirect emissions during the remediation of soil contaminated by nitrotoluene monochloride by leaching method are calculated according to the following formula:

[0206]

[0207] The contribution rate of each type is calculated based on the total carbon emissions during soil remediation. The calculation formula is:

[0208]

[0209] Finally, based on the analysis of the accounting results, high emission nodes are identified and the carbon emission control plan is determined.

[0210] In the embodiment of the present invention, by systematically defining the accounting boundaries, dividing and identifying various types of emission sources and the types of gases they produce in detail, establishing a carbon emission accounting model, and strictly ensuring the integrity and accuracy of the data, a quantitative analysis of the total carbon emissions and the contribution rate of each emission source is achieved. This method can intuitively calculate the carbon emissions during the soil remediation process, and helps to determine the contribution rate of each emission source, so as to achieve low-carbon management of the process and achieve the goal of green remediation. The present invention has the advantages of simple implementation, high accuracy, and fast calculation speed, and provides strong support for carbon emission management in soil remediation projects.

[0211] Based on the same inventive concept, an embodiment of the present application also provides a system for carbon emission accounting during soil remediation, which is used to implement the above-mentioned carbon emission accounting method during soil remediation. Figure 3 This is a schematic diagram of the structure of a system for calculating carbon emissions in soil remediation in an embodiment of the present invention, see Figure 3 As shown, the system 300 for carbon emission accounting in soil remediation process may include:

[0212] The data collection module 301 is used to collect carbon emission related data generated by each carbon emission source during the soil remediation process, including at least the activity level and emission factor of each carbon emission source; it can also include parameters selected according to actual conditions, such as fuel carbon oxidation rate and other parameters.

[0213] The carbon emission calculation module 302 is used to accurately calculate the carbon emissions based on the collected raw data using the built-in carbon emission accounting model; in addition, the calculation module supports dynamic adjustment and can adjust the calculation parameters according to different repair methods or conditions, thereby outputting more accurate carbon emission data.

[0214] The accounting result analysis module 303 is used to calculate the contribution rate of each carbon emission source in the soil remediation process; this module aims to conduct a comprehensive analysis of the carbon emission accounting results. First, the module will analyze the contribution rate of a single emission source, calculate the proportion of each emission source in the total carbon emissions, and identify the main carbon emission sources. Next, the module classifies and analyzes emissions of materials, energy consumption, and material consumption, and calculates the total amount of each type of emissions to determine their proportion in the overall carbon emissions. Finally, the analysis module also distinguishes between direct emissions and indirect emissions, calculates the total amount of direct and indirect emissions respectively, and analyzes their respective proportions of total emissions, providing data support for enterprises or research projects to formulate more effective emission reduction strategies.

[0215] The data visualization module 304 is used to provide intuitive visualization functions, and present complex carbon emission data in the form of charts, curves or heat maps, so that users can intuitively understand. Through the visualization interface, users can monitor the changing trend of carbon emissions in real time, identify the high emission links of carbon emissions in the repair process, and timely optimize the carbon emission management strategy in the repair process.

[0216] Through the coordinated work of the above four modules, the system platform can provide comprehensive support for carbon emission management in soil remediation projects, thereby achieving efficient carbon emission monitoring and optimization, and helping to reduce the negative impact on the environment during the remediation process.

[0217] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0218] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A method for calculating carbon emissions during soil remediation, characterized in that: include: Determine the boundaries of the carbon emission accounting system during soil remediation, which is used to define the accounting scope, which includes carbon emissions generated by soil remediation sites and remediation facilities, including direct remediation systems and auxiliary remediation systems; Determine the types of carbon emission sources within the accounting scope based on the remediation technology used in the soil remediation process; According to the determined carbon emission source types, a carbon emission accounting model in the soil remediation process is constructed; Based on the carbon emission accounting model, collecting accounting data sets corresponding to each carbon emission source; the accounting data sets include activity level and emission factor data of each emission source in the soil remediation process; The carbon emissions during soil remediation and the contribution rate of each carbon emission source are calculated based on the collected accounting data set.

2. The method according to claim 1, characterized in that The direct repair system includes crushing, stirring, heating, chemical addition and tail gas treatment; the auxiliary repair system includes a ventilation system, a transportation system, a drainage system serving the direct repair system, and a power, power supply and water supply system of the repair system.

3. The method according to claim 2, characterized in that The types of carbon emission sources include, but are not limited to, carbon emissions from fuel combustion, carbon emissions from decomposition of organic pollutants, carbon emissions from decomposition of soil organic carbon, carbon emissions from remediation agents, and carbon emissions implied by net purchase of electricity and heat.

4. The method according to claim 3, characterized in that The carbon emission accounting model is expressed as the sum of the carbon emissions of each of the carbon emission sources; The carbon emission from the fuel combustion is expressed as: Among them, E CO2_燃烧 is the carbon emission from fuel combustion, a is the type of fossil fuel, and an is the number of types of fossil fuels; AD a The consumption of fossil fuel type a for fuel combustion; AC a The carbon content of fossil fuel type a is expressed in tons of carbon per ton of fuel for solid or liquid fuels and tons of carbon per 10,000 Nm2 for gaseous fuels. 3 Unit: OF a is the carbon oxidation rate of fossil fuel a; A a is the uncertainty factor of fossil fuel type a; 44 / 12 is the molecular weight conversion coefficient of CO2 and carbon; The carbon emissions from the decomposition of organic pollutants are expressed as: Among them, E CO2_有机污染物 is the carbon emission from the decomposition of organic pollutants, b is the type of organic pollutants, and bn is the number of types of organic pollutants; BD b is the total content of organic pollutants b, in tons; η b is the decomposition rate of organic pollutant b; BC b is the carbon content of organic pollutant b; B b is the uncertainty factor for the decomposition of organic pollutant b; Carbon emissions from soil organic carbon decomposition are expressed as: Among them, E CO2_土壤有机碳 is the carbon emission from soil organic carbon decomposition, CD is the total amount of soil organic carbon, in tons; η c is the soil organic carbon decomposition rate; C is the uncertainty factor of organic carbon decomposition; The carbon emissions generated by the repair agent are expressed as: AND CO2_修复药剂 =And 分解 +E 生产运输 , Among them, E CO2_修复药剂 To repair the carbon emissions generated by the agent, E 分解 To repair the carbon emissions generated by the decomposition of the agent itself, E 生产运输 To repair the carbon emissions generated during the production and transportation of the agent; The calculation formula of carbon emissions generated by the decomposition of the repair agent is expressed as: Among them, E 分解 is the carbon emission generated by the decomposition of the repair agent itself; d is the type of repair agent, dn is the number of types of repair agents; DD d is the amount of repair agent d added, in tons; η d is the decomposition rate of the repair agent d; PUR d is the purity expressed by the mass fraction of the dth repair agent; DC d is the carbon content of the repair agent d; d The uncertainty factor for the decomposition of the repair agent d; The carbon emissions caused by the production and transportation of repair agents are expressed as: Among them, E 生产运输 Carbon emissions generated by the production and transportation of repair agents; EF d is the carbon emission factor of the repair agent d; E d To repair the uncertainty factor in the production and transportation of drug d; The carbon emissions embodied in net purchased electricity are expressed as: AND CO2_净电 =AD 电力 ×EF 电力 ×U 电力 , The carbon emissions embodied in net purchased heat are expressed as: AND CO2_净热 =AD 热力 ×EF 热力 ×U 热力 , Among them, E CO2_净电 is the carbon emissions embodied in the net purchased electricity, E CO2_净热 The carbon emissions embodied in the net purchase of heat, AD 电力 is the net purchased electricity consumption, in MWh; U 电力 is the uncertainty factor of net purchased electricity; AD 热力 is the net purchased heat consumption, in GJ; EF 电力 EF is the carbon emission factor of electricity supply, in tons CO2 / MWh; 热力 is the carbon emission factor of heat supply, in tons CO2 / GJ; U 热力 is the uncertainty factor for net purchased electricity.

5. The method according to claim 4, characterized in that The carbon emissions in the soil remediation process and the contribution rate of each carbon emission source are calculated based on the collected accounting data set, including: Calculate the carbon emissions of each carbon emission source based on its activity level and emission factor data; Calculate the total carbon emissions during soil remediation based on the carbon emissions of each carbon emission source; The contribution rate of each carbon emission source is calculated based on its carbon emissions and total carbon emissions.

6. The method according to claim 5, characterized in that The contribution rate of each carbon emission source is expressed as: Among them, C i is the contribution rate of the ith carbon emission source; is the emission of the ith carbon emission source; E GHG is the total carbon emissions during soil remediation.

7. The method according to claim 4, characterized in that The carbon emissions during soil remediation and the contribution rate of each carbon emission source are calculated based on the collected accounting data set, including: Classify each carbon emission source according to the preset classification type and calculate the carbon emissions of each classification type; The contribution rate of each classification type is calculated based on the carbon emissions of each classification type and the total carbon emissions.

8. A system for carbon emission accounting in soil remediation process, used to implement the method according to any one of claims 1 to 7, characterized in that: include: A data collection module is used to collect carbon emission-related data generated by various carbon emission sources during the soil remediation process, including at least collecting the activity level and emission factor of each carbon emission source; The carbon emission calculation module is used to accurately calculate the carbon emissions in the soil remediation process based on the collected raw data and use the built-in carbon emission accounting model to quantify the carbon footprint of each carbon emission source; The accounting result analysis module is used to calculate the contribution rate of each carbon emission source in the soil remediation process; The data visualization module is used to provide intuitive visualization functions and display complex carbon emission data in the form of charts, curves or heat maps.

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