Life cycle-based household garbage fine utilization system carbon emission accounting method

Abstract

The invention belongs to the technical field of carbon emission, and particularly discloses a life cycle-based carbon emission accounting method for a household garbage fine utilization system, and the life cycle comprises a garbage collection and transportation stage, a fine treatment stage and a resource recovery stage. The method comprises the following steps: determining a first carbon emission amount for transporting household garbage in a garbage collection and transportation stage; determining a second carbon emission in a fine treatment stage based on the carbon emission released when different types of household garbage are treated by using different recovery processes; based on the carbon emission reduction amount of the fuel product and the carbon sequestration amount of the carbon sequestration product generated in the refining treatment stage, determining the third carbon emission amount of the resource recovery stage; and carbon emission accounting of the life fine utilization system is completed based on the first carbon emission, the second carbon emission and the third carbon emission. According to the invention, quantitative accounting is carried out on the carbon emission in the system life cycle, and more accurate carbon accounting is achieved.

Description

Technical Field

[0001] The present application belongs to the field of carbon emission technology, and more specifically, relates to a carbon emission accounting method for a household waste fine utilization system based on a life cycle. Background Art

[0002] With the acceleration of urbanization, the production of domestic waste has increased dramatically, bringing great pressure to the environment. Traditional waste disposal methods, such as landfill and incineration, not only occupy a large amount of land resources, but also may cause environmental pollution problems, especially the increasingly prominent carbon emission problem. In order to meet this challenge, the refined utilization of domestic waste has gradually become an important environmental protection strategy.

[0003] The refined utilization of domestic waste emphasizes the classification, recycling and reuse of waste, aiming to achieve the resource utilization, reduction and harmlessness of waste. However, in this process, the issue of carbon emissions cannot be ignored. Since the classification, transportation, treatment and reuse of waste involve energy consumption and greenhouse gas emissions, accurately calculating the carbon emissions in the refined utilization of domestic waste is of great significance for evaluating its environmental impact, formulating emission reduction strategies and optimizing utilization plans.

[0004] At present, carbon emission accounting methods mainly include emission factor method, mass balance method and actual measurement method. However, the applicability of these methods in the field of fine utilization of domestic waste is not exactly the same. Although the emission factor method is simple to operate, it is difficult to accurately reflect the specific carbon emissions in the waste treatment process; although the mass balance method can reflect the actual amount of carbon emissions, the calculation process is complicated and data acquisition is difficult; the actual measurement method requires high-precision measurement equipment and professional technicians, and the cost is relatively high.

[0005] Therefore, it is necessary to develop a more accurate, simple and economical method for calculating carbon emissions during the refined utilization of domestic waste. Summary of the invention

[0006] In view of the defects existing in the related technologies, the embodiments of the present application provide a carbon emission accounting method for a system for fine utilization of domestic waste based on the life cycle, aiming to solve the problem of carbon emission accounting in the process of fine utilization of domestic waste.

[0007] In a first aspect, the embodiment of the present application provides a carbon emission accounting method for a household waste fine utilization system based on a life cycle, wherein the life cycle includes a waste collection and transportation stage, a fine processing stage, and a resource recovery stage, and the method includes:

[0008] Determine the first carbon emissions of transporting domestic waste during the waste collection and transportation stages;

[0009] Based on the carbon emissions released when using different recycling processes to treat different types of domestic waste, determine the second carbon emissions in the refined treatment stage;

[0010] Based on the carbon emission reduction of fuel products and the carbon sequestration of carbon sequestration products generated in the fine processing stage, the third carbon emission in the resource recovery stage is determined;

[0011] Based on the first carbon emissions, the second carbon emissions and the third carbon emissions, the carbon emissions accounting of the life fine utilization system is completed.

[0012] In some embodiments, determining the second carbon emission amount in the refinement processing stage includes:

[0013] Determine the second carbon emission based on the direct carbon emission and indirect carbon emission in the refined processing stage;

[0014] Among them, direct carbon emissions include the carbon emissions released when different types of domestic waste are treated using different recycling processes, and indirect carbon emissions include the carbon emissions generated by electricity consumption, heat consumption and machinery use during the recycling process.

[0015] In some embodiments, different types of household waste are processed using different recycling processes, including:

[0016] Use high temperature anaerobic fermentation process to treat fermentable waste;

[0017] Treat plastic waste using catalytic cracking coupled with in-situ upgrading technology;

[0018] Treatment of fibrous waste and fermentation residues using a high temperature pyrolysis process.

[0019] In some embodiments, direct carbon emissions satisfy the following calculation formula:

[0020] D=D 催化裂解 +D 高温热解 +D 高温厌氧发酵 +D 自供热

[0021] Where D represents direct carbon emissions, D 催化裂解 represents the carbon emissions from the catalytic cracking coupled with in-situ upgrading process, D 高温热解 represents the carbon emissions from the high temperature pyrolysis process, D 高温厌氧发酵 represents the carbon emissions from the high temperature anaerobic fermentation process, D 自供热 It represents the carbon emissions generated by the combustion of all pyrolysis oil and 50% pyrolysis gas produced by high-temperature pyrolysis technology for heating.

[0022] In some embodiments, indirect carbon emissions satisfy the following calculation formula:

[0023] Cindirect =C electricity +C heat +C m

[0024] Among them, C indirect Indirect carbon emissions, C electricity Indicates the carbon emissions generated by electricity consumption during the recycling process, C heat Indicates the carbon emissions generated by the heat consumed during the recycling process, C m It represents the carbon emissions generated by the use of machinery and is related to the carbon emission factor of the machinery’s energy consumption.

[0025] In some embodiments, the carbon reduction of the fuel product includes:

[0026] The first carbon reduction is achieved by using the hydrocarbon-rich gas produced by catalytic cracking coupled with in-situ upgrading technology and the pyrolysis gas produced by high-temperature pyrolysis technology to enrich the pyrolysis gas with carbon dioxide to replace the coke oven gas;

[0027] Second carbon emission reduction from fuel oil replacing diesel produced by catalytic cracking coupled with in-situ upgrading technology;

[0028] The third carbon emission reduction is achieved by replacing natural gas with biogas produced by high-temperature anaerobic fermentation technology.

[0029] In some embodiments, the first carbon emission reduction satisfies the following calculation formula:

[0030] C pyr-gas =P pyr-gas ×(F gas -F pyr-gas )

[0031] Among them, C pyr-gas Represents the first carbon emission reduction, P pyr-gas Indicates the yield of pyrolysis gas and hydrocarbon-rich gas; F pyr-gas represents the carbon emission factor of pyrolysis gas and hydrocarbon-rich gas, F gas represents the carbon emission factor of coke oven gas;

[0032] The second carbon emission reduction meets the following calculation formula:

[0033] C oil =P oil ×(F diesel -F oil )

[0034] Among them, C oil Represents the second carbon emission reduction, P oil Indicates the output of fuel oil, F oil and F diesel represent the carbon emission factors of fuel oil and diesel respectively;

[0035] The third carbon emission reduction meets the following calculation formula:

[0036] C bio-gas =P bio-gas ×(F natural gas -F bio-gas )

[0037] Among them, C bio-gas represents the third carbon emission reduction, P bio-gas represents the biogas production, F bio-gas and F natural gas represent the carbon emission factors of biogas and natural gas respectively.

[0038] In some embodiments, the carbon sequestration amount of the carbon sequestration product includes:

[0039] The first carbon fixation amount of carbon-based organic fertilizer mixed with organic fertilizer produced by high-temperature anaerobic fermentation technology and pyrolysis carbon produced by high-temperature pyrolysis technology;

[0040] The second carbon fixation amount of functional carbon materials produced by catalytic cracking coupled with in-situ upgrading technology;

[0041] The third carbon fixation amount of fuel oil produced by catalytic cracking coupled with in-situ upgrading technology.

[0042] In some embodiments, the first carbon fixation amount satisfies the following calculation formula:

[0043] C fertilizer =P fertilizer ×CC fertilizer ×BS

[0044] Among them, C fertilizer represents the first carbon fixation amount, P fertilizer Indicates the output of carbon-based organic fertilizer, CC fertilizer It indicates the carbon content in carbon-based organic fertilizer, and BS indicates the stability of carbon element in carbon-based organic fertilizer;

[0045] The second carbon fixation amount satisfies the following calculation formula:

[0046] C material =P material ×CC material

[0047] Among them, C material represents the second carbon fixation amount, P material Indicates the yield of functional carbon materials, CC material Indicates the carbon content of the functional carbon material;

[0048] The third carbon fixation amount satisfies the following calculation formula:

[0049] C high quality oil =Phigh quality oil ×CC high quality oil

[0050] Among them, C high quality oil represents the third carbon fixation amount, P high quality oil Indicates the production of fuel oil, CC high quality oil Indicates the carbon content of fuel oil.

[0051] In some embodiments, in the refined treatment stage of the domestic waste refined utilization system, fermentable waste is treated by a high-temperature anaerobic fermentation process to prepare biogas and organic fertilizer, and the biogas is used to replace natural gas; plastic waste is treated by catalytic cracking coupled with an in-situ upgrading process to prepare hydrocarbon-rich gas, fuel oil and functional carbon materials, and the fuel oil is used to replace diesel; fermentation residues and fiber waste are treated by a high-temperature pyrolysis process to prepare pyrolytic charcoal, pyrolytic oil and pyrolytic gas, all of the pyrolytic oil and 50% of the pyrolytic gas are burned for self-heating, 50% of the pyrolytic gas is combined with the hydrocarbon-rich gas to enrich carbon dioxide to replace coke oven gas, and the pyrolytic charcoal and organic fertilizer are mixed in proportion to make carbon-based organic fertilizer.

[0052] In a second aspect, the embodiment of the present application further provides a carbon emission accounting device for a household waste fine utilization system based on a life cycle, comprising:

[0053] A first determination module is used to determine the first carbon emission of transporting domestic waste in the waste collection and transportation stage;

[0054] A second determination module is used to determine the second carbon emission in the refined treatment stage based on the carbon emission released when different types of domestic waste are treated by different recycling processes;

[0055] A third determination module is used to determine the third carbon emission amount in the resource recovery stage based on the carbon emission reduction amount of the fuel products and the carbon sequestration amount of the carbon sequestration products generated in the fine processing stage;

[0056] The accounting module is used to complete the carbon emission accounting of the life fine utilization system based on the first carbon emission, the second carbon emission and the third carbon emission.

[0057] In a third aspect, an embodiment of the present application further provides an electronic device, comprising: at least one memory for storing programs; and at least one processor for executing the programs stored in the memory. When the program stored in the memory is executed, the processor is used to execute the method described in the first aspect or any possible implementation of the first aspect.

[0058] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program runs on a processor, the processor executes the method described in the first aspect or any possible implementation of the first aspect.

[0059] In a fifth aspect, an embodiment of the present application further provides a computer program product, which, when executed on a processor, enables the processor to execute the method described in the first aspect or any possible implementation of the first aspect.

[0060] The carbon emission accounting method for the refined utilization system of domestic waste based on the life cycle provided in the embodiment of the present application, combined with the refined utilization plan of domestic waste recycling, quantitatively calculates the carbon emissions in the system life cycle for each link such as domestic waste collection and transportation, refined treatment, and resource recovery. It comprehensively considers the properties and characteristics of different types of domestic waste, and adopts recycling technology adapted to them for processing, in order to achieve a more accurate carbon accounting purpose, thereby being able to truly reflect the carbon emissions of each link and provide data support for the development of carbon emission-related research. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the present application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0062] Figure 1 This is one of the flow charts of the carbon emission accounting method of the household waste fine utilization system based on the life cycle provided in the embodiment of the present application;

[0063] Figure 2 This is the second flow chart of the carbon emission accounting method of the household waste fine utilization system based on the life cycle provided in the embodiment of the present application;

[0064] Figure 3 It is a structural schematic diagram of a carbon emission accounting device for a life cycle-based household waste fine utilization system provided in an embodiment of the present application;

[0065] Figure 4 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0067] Figure 1 This is one of the flow charts of the carbon emission accounting method of the household waste fine utilization system based on the life cycle provided in the embodiment of the present application, such as Figure 1As shown, the method at least includes the following steps:

[0068] S101, determining the first carbon emission of transporting domestic waste in the waste collection and transportation stage;

[0069] S102, determining a second carbon emission amount in the refined treatment stage based on the carbon emission amounts released when different types of domestic waste are treated by different recycling processes;

[0070] S103, determining the third carbon emission amount in the resource recovery stage based on the carbon emission reduction amount of the fuel products and the carbon sequestration amount of the carbon sequestration products generated in the fine processing stage;

[0071] S104. Based on the first carbon emission, the second carbon emission and the third carbon emission, complete the carbon emission accounting of the living fine utilization system.

[0072] Specifically, the application scenario of the embodiment of the present application is a system for fine utilization of domestic waste, and the fine utilization of domestic waste by this system involves the following three stages: waste collection and transportation stage, fine processing stage and resource recovery stage.

[0073] During the garbage collection and transportation stage, domestic waste is collected, sorted and transported to designated locations. The carbon emissions in this stage mainly come from the transportation of domestic waste.

[0074] In some embodiments, S101 determines the first carbon emission of transporting domestic waste in the waste collection and transportation stage, which satisfies the following calculation formula:

[0075] C t =∑A i L i Y i

[0076] Among them, C t It indicates the first carbon emission of domestic waste in the waste collection and transportation stage, in kg CO2 or t CO2; A i represents the transportation volume of the i-th type of domestic waste, in t; Y i The carbon emission factor per unit turnover of the transport equipment for transporting the i-th type of domestic waste, in kg CO2 / (t·km); L i Represents the transportation distance of the ith type of domestic waste, in km.

[0077] During the refined processing stage, different recycling processes are used to treat different types of domestic waste. The carbon emissions in this stage mainly come from the carbon emissions released by each recycling process.

[0078] In some embodiments, S102 specifically includes:

[0079] Determine the second carbon emission based on the direct carbon emission and indirect carbon emission in the refined processing stage;

[0080] Among them, direct carbon emissions include the carbon dioxide emissions released when different types of domestic waste are treated using different recycling processes, and indirect carbon emissions include the carbon emissions generated by electricity consumption, heat consumption and machinery use during the recycling process.

[0081] Specifically, in the fine processing stage, the direct source of carbon emissions is mainly the carbon emissions released during the various recycling processes, and the indirect source is mainly generated by the electricity consumption and heat energy during the operation process and the mechanical equipment used in this stage. Direct carbon emissions and indirect carbon emissions together constitute the second carbon emissions in the fine processing stage.

[0082] In some embodiments, different types of domestic waste are processed using different recycling processes in S102, specifically including:

[0083] Use high temperature anaerobic fermentation process to treat fermentable waste;

[0084] Treat plastic waste using catalytic cracking coupled with in-situ upgrading technology;

[0085] The fermentation residues and fibrous waste are treated by high temperature pyrolysis process.

[0086] Specifically, in the refined processing stage, the nature and characteristics of different types of domestic waste are taken into consideration, and suitable waste recycling technologies are used to treat them, in order to achieve more accurate carbon accounting.

[0087] Optionally, for fermentable garbage, high-temperature anaerobic fermentation technology is used to prepare biogas and organic fertilizer, mainly to prepare biogas liquid, biogas and biogas residue, so as to achieve the substitution of biogas for natural gas. High-temperature anaerobic fermentation refers to the decomposition of organic matter into substances such as organic acids and gases through the metabolic process of microorganisms under set high temperature conditions. High-temperature anaerobic fermentation does not require additional heating equipment, and only needs to use the heat generated by microbial metabolism to maintain the temperature of the fermentation process, thereby achieving the purpose of energy saving; the organic acids and gases produced can be used to produce organic fertilizers or biogas, etc., while reducing the generation of waste, which is environmentally friendly.

[0088] Optionally, for plastic waste, catalytic cracking coupled in-situ upgrading technology is used to convert plastic waste into hydrocarbon-rich gas, fuel oil and functional carbon materials. Fuel oil as a high-quality oil can replace diesel, and functional carbon materials have a certain carbon fixation capacity.

[0089] The catalytic cracking coupled in-situ upgrading technology combines the two processes of catalytic cracking and in-situ upgrading. Catalytic cracking refers to the process of converting macromolecular compounds in raw materials into small molecular compounds under the action of catalysts; while in-situ upgrading refers to the process of directly converting raw materials into high-quality products in the reactor through specific catalysts and reaction conditions during the catalytic cracking process. The catalytic cracking coupled in-situ upgrading technology has low energy consumption and carbon emissions, and meets the requirements of environmental protection and sustainable development.

[0090] Optionally, for fermentation residues and fiber waste, high-temperature pyrolysis technology (specifically, co-pyrolysis technology) is used to obtain three-state pyrolysis products. High-temperature pyrolysis refers to the process of pyrolysis treatment of substances under high temperature conditions. Its principle is mainly based on the thermal instability of molecules in the garbage. It is heated and distilled under anaerobic or anoxic conditions to cause cracking of organic matter, which is then condensed to form a variety of new forms such as gas, liquid and solid. High-temperature pyrolysis can convert fermentation residues and fiber waste into valuable resources, including pyrolysis charcoal, pyrolysis gas and pyrolysis oil, etc., to achieve the recycling of resources, reduce environmental pollution, and significantly reduce the volume and mass of fiber waste.

[0091] Among them, pyrolytic carbon, as a carbon fixation product, has certain carbon fixation potential. It is mixed with organic fertilizer (mainly sludge) prepared by high-temperature anaerobic fermentation in proportion to make charcoal-based organic fertilizer; all pyrolysis oil and 50% of pyrolysis gas are burned to achieve self-heating; the other 50% of pyrolysis gas is used to enrich CO2 with hydrocarbon-rich gas produced by synergistic catalytic cracking coupled with in-situ quality improvement technology to replace the energy supply of coke oven gas.

[0092] Three stages constitute the life cycle of the system for fine utilization of domestic waste. The embodiment of the present application aims to comprehensively consider the various stages in the process of fine utilization of domestic waste and the impact between different stages, so as to achieve a comprehensive and accurate accounting of carbon emissions.

[0093] In some embodiments, direct carbon emissions mainly include carbon emissions released when different types of domestic waste are processed using different recycling processes, and satisfy the following calculation formula:

[0094] D=D 催化裂解 +D 高温热解 +D 高温厌氧发酵 +D 自供热

[0095] Where D represents direct carbon emissions, D 催化裂解 represents the carbon emissions from the catalytic cracking coupled with in-situ upgrading process, D 高温热解 represents the carbon emissions from the high temperature pyrolysis process, D 高温厌氧发酵 represents the carbon emissions from the high temperature anaerobic fermentation process, D 自供热It represents the carbon emissions generated by the combustion of all pyrolysis oil and 50% pyrolysis gas produced by high-temperature pyrolysis technology for heating.

[0096] In some embodiments, indirect carbon emissions mainly include carbon emissions generated by electricity consumption, heat consumption and mechanical use during the recycling process, which satisfies the following calculation formula:

[0097] C indirect =C electricity +C heat +C m

[0098] Among them, C indirect Indirect carbon emissions, C electricity Indicates the carbon emissions generated by the electricity consumed during the recycling process, C heat Indicates the carbon emissions generated by the heat consumed during the recycling process, C m It represents the carbon emissions generated by the use of machinery, which is related to the carbon emission factor of the machinery’s energy consumption.

[0099] Optionally, the carbon emissions generated by the use of the machinery C m , satisfying the following calculation formula:

[0100] C m =∑E mj F mj

[0101] E mj =N mj W mj

[0102] Among them, E mj is the energy consumption of the jth machine in the refinement stage, in kW·h or kg; F mj is the carbon emission factor of the jth mechanical energy consumption, in kg CO2 / kW·h or kg CO2 / kg; N mj is the number of machines of the jth type used, in units; W mj is the energy consumption per unit shift of the j-th machine, in kW·h / machine or kg / machine.

[0103] During the resource recovery stage, the carbon emission reduction potential of the fuel products produced in the fine processing stage that replace traditional fuel products and the carbon sequestration potential of some carbon sequestration products are calculated.

[0104] In some embodiments, the carbon emission reduction in S103 includes:

[0105] The first carbon reduction is achieved by using the hydrocarbon-rich gas produced by catalytic cracking coupled with in-situ upgrading technology and the pyrolysis gas produced by high-temperature pyrolysis technology to enrich the pyrolysis gas with carbon dioxide to replace the coke oven gas;

[0106] Second carbon emission reduction from fuel oil replacing diesel produced by catalytic cracking coupled with in-situ upgrading technology;

[0107] The third carbon emission reduction is achieved by replacing natural gas with biogas produced by high-temperature anaerobic fermentation technology.

[0108] Specifically, the hydrocarbon-rich gas produced by catalytic cracking coupled with in-situ upgrading technology cooperates with the pyrolysis gas produced by high-temperature pyrolysis technology to enrich carbon dioxide to replace the energy supply of coke oven gas, and the reduced carbon emissions meet the following calculation formula:

[0109] C pyr-gas =P pyr-gas ×(F gas -F pyr-gas )

[0110] Among them, C pyr-gas It represents the first carbon emission reduction of pyrolysis / hydrocarbon-rich gas replacing traditional coke oven gas, P pyr-gas Indicates the yield of pyrolysis / hydrocarbon-rich gas, in kg; F pyr-gas and F gas They represent the carbon emission factors of pyrolysis / hydrocarbon-rich gas and coke oven gas, respectively, in kg CO2 / kg.

[0111] The fuel oil produced by catalytic cracking coupled with in-situ upgrading technology can replace diesel as high-quality oil, and the reduced carbon emissions meet the following calculation formula:

[0112] C oil =P oil ×(F diesel -F oil )

[0113] Among them, C oil It represents the carbon emission reduction of fuel oil replacing diesel, P oil Indicates the output of fuel oil, in kg; F oil 、F diesel Represents the carbon emission factor of fuel oil and diesel, with the unit of kg CO2 / kg.

[0114] Biogas (mainly biogas) produced by high-temperature anaerobic fermentation technology can replace coal-based natural gas, and the reduced carbon emissions meet the following calculation formula:

[0115] C bio-gas =P bio-gas ×(F natural gas -F bio-gas )

[0116] Among them, C bio-gas represents the third carbon emission reduction when biogas replaces natural gas, P bio-gas Indicates the output of biogas, in kg; Fbio-gas and F natural gas They represent the carbon emission factors of biogas and natural gas respectively, in kgCO2 / kg.

[0117] In some embodiments, the carbon fixation amount in S103 includes:

[0118] The first carbon fixation amount of carbon-based organic fertilizer mixed with organic fertilizer produced by high-temperature anaerobic fermentation technology and pyrolysis carbon produced by high-temperature pyrolysis technology;

[0119] The second carbon fixation amount of functional carbon materials produced by catalytic cracking coupled with in-situ upgrading technology;

[0120] The third carbon fixation amount of fuel oil produced by catalytic cracking coupled with in-situ upgrading technology.

[0121] Specifically, the organic fertilizer produced by the high-temperature anaerobic fermentation technology and the pyrolysis carbon produced by the high-temperature pyrolysis technology are mixed in proportion to form a carbon-based organic fertilizer. The first carbon fixation amount of the carbon-based organic fertilizer satisfies the following calculation formula:

[0122] C fertilizer =P fertilizer ×CC fertilizer ×BS

[0123] Among them, C fertilizer Indicates the first carbon fixation amount of carbon-based organic fertilizer; P fertilizer Indicates the output of carbon-based organic fertilizer, in kg; CC fertilizer It indicates the carbon content in carbon-based organic fertilizer, in %; BS indicates the stability of carbon element in carbon-based organic fertilizer, in %.

[0124] The functional carbon material produced by catalytic cracking coupled with in-situ upgrading technology has a certain carbon fixation potential. The second carbon fixation amount of the functional carbon material satisfies the following calculation formula:

[0125] C material =P material ×CC material

[0126] Among them, C material Indicates the second carbon fixation amount of the functional carbon material; P material Indicates the output of functional carbon materials, in kg; CC material Indicates the carbon content of the functional carbon material in %.

[0127] Fuel oil produced by catalytic cracking coupled with in-situ upgrading technology, as a high-quality oil, has a certain carbon fixation potential. The third carbon fixation amount of fuel oil satisfies the following calculation formula:

[0128] C high quality oil =P high quality oil ×CC high quality oil

[0129] Among them, C high quality oil Indicates the third carbon fixation of fuel oil; P high quality oil Indicates the output of fuel oil in kg; CC high quality oil Indicates the carbon content of fuel oil in %.

[0130] The carbon emission accounting method for the refined utilization system of domestic waste based on the life cycle provided in the embodiment of the present application, combined with the refined utilization plan of domestic waste recycling, quantitatively calculates the carbon emissions in the system life cycle for each link such as domestic waste collection and transportation, refined treatment, and resource recovery. It comprehensively considers the properties and characteristics of different types of domestic waste (such as fermentable waste, fibrous waste, and plastic waste, etc.), and adopts recycling technologies adapted to them for treatment (such as high-temperature pyrolysis, catalytic cracking coupled in-situ quality improvement, high-temperature anaerobic fermentation, etc.), in order to achieve a more accurate carbon accounting purpose, thereby being able to truly reflect the carbon emissions of each link and provide data support for the development of carbon emission-related research.

[0131] The technical solution provided in the embodiment of the present application is further illustrated below through a specific example.

[0132] Figure 2 This is the second flow chart of the carbon emission accounting method of the household waste fine utilization system based on the life cycle provided in the embodiment of the present application, such as Figure 2 As shown:

[0133] During the garbage collection and transportation stage, kitchen waste, fiber and plastic waste are sorted and transported point-to-point using a separate collection and transportation mode. They are directly transported to the coordinated treatment plant by garbage trucks at the source of garbage generation. Assume that the transportation distance from the garbage collection point to the treatment plant is 20km, the transportation tool is a 10t truck with a loading rate of 60%, the fuel consumption is 0.22L / km, the diesel density is 0.86kg / L, and the diesel carbon emission factor is 3.15t CO2 / t. Substitute the specific data into the following calculation formula:

[0134] C t =∑A i L i Y i

[0135] Among them, C t It indicates the first carbon emission of domestic waste in the waste collection and transportation stage, in kg CO2 / t CO2; A i represents the transportation volume of the i-th type of domestic waste, in t; Y i The carbon emission factor per unit turnover of the transport equipment for transporting the i-th type of domestic waste, in kg CO2 / (t·km); Li represents the transportation distance of the i-th type of domestic waste, in km. The carbon emission in the transportation stage is 0.66t CO2.

[0136] In the refined processing stage, 0.146 kg of kitchen waste was used as raw material, and the fermentable part was treated with high-temperature anaerobic fermentation technology to generate 0.117 kg of biogas for aquatic culture. The carbon content in the biogas was very low, almost zero, and its carbon emissions were not considered in the study; 0.024 kg of biogas was generated to replace coal-based natural gas; 0.004 kg of biogas residue was generated and mixed with pyrolytic carbon in a certain proportion to make a carbon-based organic fertilizer with a carbon fixation rate of 1.95%.

[0137] Using 0.0523kg of non-fermentable waste and fiber waste (in a ratio of 5:13) in kitchen waste as raw materials, co-pyrolysis technology was adopted to obtain three-state pyrolysis products. All pyrolysis oil and 50% pyrolysis gas were burned for self-heating, and the other 50% pyrolysis gas was coordinated with hydrocarbon-rich gas for CO2 enrichment to replace the energy supply of coke oven gas. Pyrolysis charcoal and sludge were mixed in proportion to make carbon-based organic fertilizer.

[0138] Using 0.0523 kg of plastic waste as raw material, the products generated by catalytic cracking coupled with in-situ upgrading technology include fuel oil as a high-quality oil that can replace diesel, and hydrocarbon-rich gas and pyrolysis gas for CO2 enrichment to replace the energy supply of coke oven gas.

[0139] In the resource recovery stage, the carbon emission reduction potential of the fuel products produced in the fine processing stage that replace traditional fuel products and the carbon sequestration potential of some carbon sequestration products are mainly calculated.

[0140] The technical solution provided in the embodiment of the present application is not only highly accurate and operational in carbon emission accounting, but also can provide a scientific basis for optimizing the refined utilization of domestic waste and promote the sustainable development of environmental protection.

[0141] Figure 3 : is a structural schematic diagram of a carbon emission accounting device for a life cycle-based household waste fine utilization system provided in an embodiment of the present application, such as Figure 3 As shown, the device at least includes:

[0142] The first determination module 301 is used to determine the first carbon emission of transporting domestic waste in the waste collection and transportation stage;

[0143] A second determination module 302 is used to determine a second carbon emission amount in the refined processing stage based on the carbon emission amount released when different types of domestic waste are processed using different recycling processes;

[0144] The third determination module 303 is used to determine the third carbon emission amount in the resource recovery stage based on the carbon emission reduction amount of the fuel product and the carbon fixation amount of the carbon fixation product generated in the fine processing stage;

[0145] The accounting module is used to complete the carbon emission accounting of the life fine utilization system based on the first carbon emission, the second carbon emission and the third carbon emission.

[0146] In some embodiments, the second determination module 302 includes:

[0147] A first determining unit, configured to determine a second carbon emission amount based on the direct carbon emission amount and the indirect carbon emission amount in the refined processing stage;

[0148] Among them, direct carbon emissions include the carbon emissions released when different types of domestic waste are treated using different recycling processes, and indirect carbon emissions include the carbon emissions generated by electricity consumption, heat consumption and machinery use during the recycling process.

[0149] In some embodiments, different types of household waste are processed using different recycling processes, including:

[0150] Use high temperature anaerobic fermentation process to treat fermentable waste;

[0151] Treat plastic waste using catalytic cracking coupled with in-situ upgrading technology;

[0152] Treatment of fibrous waste and fermentation residues using a high temperature pyrolysis process.

[0153] In some embodiments, direct carbon emissions satisfy the following calculation formula:

[0154] D=D 催化裂解 +D 高温热解 +D 高温厌氧发酵 +D 自供热

[0155] Where D represents direct carbon emissions, D 催化裂解 represents the carbon emissions from the catalytic cracking coupled with in-situ upgrading process, D 高温热解 represents the carbon emissions from the high temperature pyrolysis process, D 高温厌氧发酵 represents the carbon emissions from the high temperature anaerobic fermentation process, D 自供热 It represents the carbon emissions generated by the combustion of all pyrolysis oil and 50% pyrolysis gas produced by high-temperature pyrolysis technology for heating.

[0156] In some embodiments, indirect carbon emissions satisfy the following calculation formula:

[0157] C indirect =C electricity +C heat +C m

[0158] Among them, C indirect Indirect carbon emissions, C electricity Indicates the carbon emissions generated by the electricity consumed during the recycling process, C heat Indicates the carbon emissions generated by the heat consumed during the recycling process, C m It represents the carbon emissions generated by the use of machinery, which is related to the carbon emission factor of the machinery’s energy consumption.

[0159] In some embodiments, the carbon reduction of the fuel product includes:

[0160] The first carbon reduction is achieved by using the hydrocarbon-rich gas produced by catalytic cracking coupled with in-situ upgrading technology and the pyrolysis gas produced by high-temperature pyrolysis technology to enrich the pyrolysis gas with carbon dioxide to replace the coke oven gas;

[0161] Second carbon emission reduction from fuel oil replacing diesel produced by catalytic cracking coupled with in-situ upgrading technology;

[0162] The third carbon emission reduction is achieved by replacing natural gas with biogas produced by high-temperature anaerobic fermentation technology.

[0163] In some embodiments, the first carbon emission reduction satisfies the following calculation formula:

[0164] C pyr-gas =P pyr-gas ×(F gas -F pyr-gas )

[0165] Among them, C pyr-gas represents the first carbon emission reduction, P pyr-gas Indicates the yield of pyrolysis gas and hydrocarbon-rich gas; F pyr-gas represents the carbon emission factor of pyrolysis gas and hydrocarbon-rich gas, F gas represents the carbon emission factor of coke oven gas;

[0166] The second carbon emission reduction meets the following calculation formula:

[0167] C oil =P oil ×(F diesel -F oil )

[0168] Among them, C oil Represents the second carbon emission reduction, P oil Indicates the output of fuel oil, F oil and F diesel represent the carbon emission factors of fuel oil and diesel respectively;

[0169] The third carbon emission reduction meets the following calculation formula:

[0170] Cbio-gas =P bio-gas ×(F natural gas -F bio-gas )

[0171] Among them, C bio-gas represents the third carbon emission reduction, P bio-gas represents the biogas production, F bio-gas and F natural gas represent the carbon emission factors of biogas and natural gas respectively.

[0172] In some embodiments, the carbon sequestration amount of the carbon sequestration product includes:

[0173] The first carbon fixation amount of carbon-based organic fertilizer mixed with organic fertilizer produced by high-temperature anaerobic fermentation technology and pyrolysis carbon produced by high-temperature pyrolysis technology;

[0174] The second carbon fixation amount of functional carbon materials produced by catalytic cracking coupled with in-situ upgrading technology;

[0175] The third carbon fixation amount of fuel oil produced by catalytic cracking coupled with in-situ upgrading technology.

[0176] In some embodiments, the first carbon fixation amount satisfies the following calculation formula:

[0177] C fertilizer =P fertilizer ×CC fertilizer ×BS

[0178] Among them, C fertilizer represents the first carbon fixation amount, P fertilizer Indicates the output of carbon-based organic fertilizer, CC fertilizer It indicates the carbon content in carbon-based organic fertilizer, and BS indicates the stability of carbon element in carbon-based organic fertilizer;

[0179] The second carbon fixation amount satisfies the following calculation formula:

[0180] C material =P material ×CC material

[0181] Among them, C material represents the second carbon fixation amount, P material Indicates the yield of functional carbon materials, CC material Indicates the carbon content of the functional carbon material;

[0182] The third carbon fixation amount satisfies the following calculation formula:

[0183] C high quality oil =P high quality oil ×CC high quality oil

[0184] Among them, Chigh qualityoil represents the third carbon fixation amount, P high quality iil Indicates the production of fuel oil, CC high quality oil Indicates the carbon content of fuel oil.

[0185] In some embodiments, in the refined treatment stage of the domestic waste refined utilization system, fermentable waste is treated by a high-temperature anaerobic fermentation process to prepare biogas and organic fertilizer, and the biogas is used to replace natural gas; plastic waste is treated by catalytic cracking coupled with an in-situ upgrading process to prepare hydrocarbon-rich gas, fuel oil and functional carbon materials, and the fuel oil is used to replace diesel; fermentation residues and fiber waste are treated by a high-temperature pyrolysis process to prepare pyrolytic charcoal, pyrolytic oil and pyrolytic gas, all of the pyrolytic oil and 50% of the pyrolytic gas are burned for self-heating, 50% of the pyrolytic gas is combined with the hydrocarbon-rich gas to enrich carbon dioxide to replace coke oven gas, and the pyrolytic charcoal and organic fertilizer are mixed in proportion to make carbon-based organic fertilizer.

[0186] It can be understood that the detailed functional implementation of each of the above-mentioned units / modules can be found in the introduction of the aforementioned method embodiment, and will not be repeated here.

[0187] It should be understood that the above-mentioned device is used to execute the method in the above-mentioned embodiment. The implementation principle and technical effect of the corresponding program module in the device are similar to those described in the above-mentioned method. The working process of the device can refer to the corresponding process in the above-mentioned method, which will not be repeated here.

[0188] Based on the method in the above embodiment, an embodiment of the present application provides an electronic device. The device may include: at least one memory for storing programs and at least one processor for executing the programs stored in the memory. When the program stored in the memory is executed, the processor is used to execute the method described in the above embodiment.

[0189] Figure 4 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application, such as Figure 4 As shown, the electronic device may include: a processor 401, a communication interface 402, a memory 403 and a communication bus 404, wherein the processor 401, the communication interface 402 and the memory 403 communicate with each other through the communication bus 404. The processor 401 may call the software instructions in the memory 403 to execute the method described in the above embodiment.

[0190] In addition, the logic instructions in the above-mentioned memory 403 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present application, or the part that contributes to the relevant technology or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application.

[0191] Based on the method in the above embodiment, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program runs on a processor, the processor executes the method in the above embodiment.

[0192] Based on the method in the above embodiment, an embodiment of the present application provides a computer program product. When the computer program product runs on a processor, the processor executes the method in the above embodiment.

[0193] It is understandable that the processor in the embodiment of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0194] The method steps in the embodiments of the present application can be implemented by hardware, or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM), registers, hard disks, mobile hard disks, CD-ROMs or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC.

[0195] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer instructions can be transmitted from a website site, a computer, a server or a data center to another website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integration. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)), etc.

[0196] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0197] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A carbon emission accounting method for a household waste fine utilization system based on a life cycle, characterized in that: The life cycle includes a garbage collection and transportation stage, a refined processing stage, and a resource recovery stage. The method includes: Determine the first carbon emission of transporting domestic waste in the waste collection and transportation stage; Determining the second carbon emission amount in the refined treatment stage based on the carbon emission amount released when different types of domestic waste are treated by different recycling processes; Determine the third carbon emission amount of the resource recovery stage based on the carbon emission reduction of the fuel products and the carbon sequestration of the carbon sequestration products generated in the fine processing stage; Based on the first carbon emissions, the second carbon emissions and the third carbon emissions, the carbon emissions accounting of the life fine utilization system is completed.

2. The carbon emission accounting method according to claim 1, characterized in that: The determining of the second carbon emission amount in the refined processing stage includes: Determining the second carbon emissions based on the direct carbon emissions and the indirect carbon emissions in the refined processing stage; Among them, the direct carbon emissions include the carbon emissions released when different types of domestic waste are treated using different recycling processes, and the indirect carbon emissions include the carbon emissions generated by electricity consumption, heat consumption and machinery use during the recycling process.

3. The carbon emission accounting method according to claim 2, characterized in that: The different types of domestic waste treated by different recycling processes include: Use high temperature anaerobic fermentation process to treat fermentable waste; Treat plastic waste using catalytic cracking coupled with in-situ upgrading technology; Treatment of fibrous waste and fermentation residues using a high temperature pyrolysis process.

4. The carbon emission accounting method according to claim 3, characterized in that: The direct carbon emissions satisfy the following calculation formula: D=D 催化裂解 +D 高温热解 +D 高温厌氧发酵 +D 自供热 Where D represents the direct carbon emissions, D 催化裂解 represents the carbon emissions from the catalytic cracking coupled with in-situ upgrading process, D 高温热解 represents the carbon emissions from the high temperature pyrolysis process, D 高温厌氧发酵 represents the carbon emissions from the high temperature anaerobic fermentation process, D 自供热 It represents the carbon emissions generated by the combustion of all pyrolysis oil and 50% pyrolysis gas produced by high-temperature pyrolysis technology for heating.

5. The carbon emission accounting method according to claim 2, characterized in that: The indirect carbon emissions satisfy the following calculation formula: C indirect =C electricity +C heat +C m Among them, C indirect represents the indirect carbon emissions, C electricity Indicates the carbon emissions generated by the electricity consumed during the recycling process, C heat Indicates the carbon emissions generated by the heat consumed during the recycling process, C m It represents the carbon emissions generated by the use of machinery, which is related to the carbon emission factor of the machinery’s energy consumption.

6. The carbon emission accounting method according to claim 1, characterized in that: The carbon emission reduction of the fuel products includes: The first carbon reduction is achieved by using the hydrocarbon-rich gas produced by catalytic cracking coupled with in-situ upgrading technology and the pyrolysis gas produced by high-temperature pyrolysis technology to enrich the pyrolysis gas with carbon dioxide to replace the coke oven gas; Second carbon emission reduction from fuel oil replacing diesel produced by catalytic cracking coupled with in-situ upgrading technology; The third carbon emission reduction is achieved by replacing natural gas with biogas produced by high-temperature anaerobic fermentation technology.

7. The carbon emission accounting method according to claim 6, characterized in that: The first carbon emission reduction satisfies the following calculation formula: C pyr-gas =P pyr-gas ×(F gas -F pyr-gas ) Among them, C pyr-gas represents the first carbon emission reduction, P pyr-gas Indicates the yield of pyrolysis gas and hydrocarbon-rich gas; F pyr-gas represents the carbon emission factor of pyrolysis gas and hydrocarbon-rich gas, F gas represents the carbon emission factor of coke oven gas; The second carbon emission reduction satisfies the following calculation formula: C oil =P oil ×(F diesel -F oil ) Among them, C oil represents the second carbon emission reduction, P oil Indicates the output of fuel oil, F oil and F diesel represent the carbon emission factors of fuel oil and diesel respectively; The third carbon emission reduction satisfies the following calculation formula: C bio-gas =P bio-gas ×(F naturalgas -F bio-gas ) Among them, C bio-gas represents the third carbon emission reduction, P bio-gas represents the biogas production, F bio-gas and F naturalgas represent the carbon emission factors of biogas and natural gas respectively.

8. The carbon emission accounting method according to claim 6, characterized in that: The carbon fixation amount of the carbon fixation product includes: The first carbon fixation amount of carbon-based organic fertilizer mixed with organic fertilizer produced by high-temperature anaerobic fermentation technology and pyrolysis carbon produced by high-temperature pyrolysis technology; The second carbon fixation amount of functional carbon materials produced by catalytic cracking coupled with in-situ upgrading technology; The third carbon fixation amount of fuel oil produced by catalytic cracking coupled with in-situ upgrading technology.

9. The carbon emission accounting method according to claim 8, characterized in that: The first carbon fixation amount satisfies the following calculation formula: C fertilizer =P fertilizer ×CC fertilizer ×BS Among them, C fertilizer represents the first carbon fixation amount, P fertilizer Indicates the output of carbon-based organic fertilizer, CC fertilizer It indicates the carbon content in carbon-based organic fertilizer, and BS indicates the stability of carbon element in carbon-based organic fertilizer; The second carbon fixation amount satisfies the following calculation formula: C material =P material ×CC material Among them, C material represents the second carbon fixation amount, P material Indicates the yield of functional carbon materials, CC material Indicates the carbon content of the functional carbon material; The third carbon fixation amount satisfies the following calculation formula: C highqualityoil =P highqualityoil ×CC highqualityoil Among them, C highqualityoil represents the third carbon fixation amount, P highqualityoil Indicates the production of fuel oil, CC highqualityoil Indicates the carbon content of fuel oil.

10. The carbon emission accounting method according to any one of claims 1 to 9, characterized in that: In the refined treatment stage of the domestic waste refined utilization system, fermentable waste is treated with a high-temperature anaerobic fermentation process to prepare biogas and organic fertilizer, and the biogas is used to replace natural gas; plastic waste is treated with a catalytic cracking coupled with an in-situ upgrading process to prepare hydrocarbon-rich gas, fuel oil and functional carbon materials, and the fuel oil is used to replace diesel; fermentation residues and fiber waste are treated with a high-temperature pyrolysis process to prepare pyrolytic charcoal, pyrolytic oil and pyrolytic gas, all of the pyrolytic oil and 50% of the pyrolytic gas are burned for self-heating, 50% of the pyrolytic gas is combined with hydrocarbon-rich gas to enrich carbon dioxide to replace coke oven gas, and the pyrolytic charcoal and organic fertilizer are mixed in proportion to make carbon-based organic fertilizer.

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