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

Abstract

The application belongs to the technical field of carbon emission and specifically discloses a carbon emission accounting method for a household garbage fine utilization system based on a life cycle, the life cycle including a garbage collection and transportation stage, a fine treatment stage and a resource recovery stage, the method including: determining a first carbon emission amount of the garbage collection and transportation stage for transporting household garbage; determining a second carbon emission amount of the fine treatment stage based on carbon emission amounts released when different types of household garbage are treated by different recovery processes; determining a third carbon emission amount of the resource recovery stage based on carbon emission reduction amounts of fuel products and carbon fixation amounts of carbon fixation products generated in the fine treatment stage; and completing carbon emission accounting of the household fine utilization system based on the first carbon emission amount, the second carbon emission amount and the third carbon emission amount. The application quantitatively accounts for carbon emission under the life cycle of the system, and achieves more accurate carbon accounting.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of carbon emissions, and more particularly, relates to a life cycle-based carbon emission accounting method for a household garbage fine utilization system. BACKGROUND

[0002] With the acceleration of urbanization, the production of household garbage has increased dramatically, bringing great pressure on the environment. Traditional garbage 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 problem of carbon emissions is increasingly prominent. In order to cope with this challenge, the fine utilization of household garbage has gradually become an important environmental protection strategy.

[0003] The fine utilization of household garbage emphasizes the classification, recycling and reuse of garbage, aiming to realize the resourceization, reduction and harmlessness of garbage. However, in this process, the problem of carbon emissions cannot be ignored. Since the classification, transportation, treatment and reuse of garbage involve energy consumption and greenhouse gas emissions, accurately accounting for the carbon emissions in the process of fine utilization of household garbage is of great significance for evaluating its environmental impact, developing emission reduction strategies and optimizing utilization schemes.

[0004] At present, the carbon emission accounting methods mainly include emission factor method, mass balance method and measurement method. However, the applicability of these methods in the field of fine utilization of household garbage is not completely the same. Although the emission factor method is simple to operate, it is difficult to accurately reflect the specific carbon emissions in the garbage disposal process; the mass balance method can reflect the actual amount of carbon emissions, but the calculation process is complex and the data acquisition is difficult; the measurement method requires high-precision measuring equipment and professional technical personnel, and the cost is high.

[0005] Therefore, for the carbon emission accounting in the process of fine utilization of household garbage, a more accurate, simple and economical method needs to be developed. SUMMARY

[0006] In view of the defects of the related art, the embodiments of the present application provide a life cycle-based carbon emission accounting method for a household garbage fine utilization system, aiming to solve the problem of carbon emission accounting in the process of fine utilization of household garbage.

[0007] In a first aspect, the embodiments of the present application provide a life cycle-based carbon emission accounting method for a household garbage fine utilization system, the life cycle including a garbage collection and transportation stage, a fine processing stage and a resource recycling stage, the method comprising:

[0008] determining a first carbon emission amount of transporting household garbage in the garbage collection and transportation stage;

[0009] determine the second carbon emission amount of the fine processing stage based on carbon emission amounts released when different types of household garbage are treated by different recycling processes;

[0010] determine the third carbon emission amount of the resource recycling stage based on carbon reduction amounts of fuel products and carbon fixation amounts of carbon fixation products generated in the fine processing stage;

[0011] complete carbon emission accounting of the household fine utilization system based on the first carbon emission amount, the second carbon emission amount, and the third carbon emission amount.

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

[0013] determine the second carbon emission amount based on direct carbon emission amounts and indirect carbon emission amounts of the fine processing stage;

[0014] The direct carbon emission amount includes carbon emission amounts released when different types of household garbage are treated by different recycling processes, and the indirect carbon emission amount includes carbon emission amounts generated by consumption of electricity, consumption of heat, and mechanical use in the recycling process.

[0015] In some embodiments, treating different types of household garbage by different recycling processes includes:

[0016] treating fermentable garbage by a high-temperature anaerobic fermentation process;

[0017] treating plastic garbage by a catalytic cracking coupled in-situ upgrading process;

[0018] treating fiber garbage and fermentation residues by a high-temperature pyrolysis process.

[0019] In some embodiments, the direct carbon emission amount satisfies 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] D represents the direct carbon emission amount, D 催化裂解 represents carbon emission amounts generated by the catalytic cracking coupled in-situ upgrading process, D 高温热解 represents carbon emission amounts generated by the high-temperature pyrolysis process, D 高温厌氧发酵 represents carbon emission amounts generated by the high-temperature anaerobic fermentation process, and D 自供热 represents carbon emission amounts generated by combustion of 50% pyrolysis gas for heat supply in addition to all pyrolysis oil generated by the high-temperature pyrolysis technology.

[0022] In some embodiments, the indirect carbon emission amount satisfies the following calculation formula:

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

[0024] wherein C indirect represents indirect carbon emissions, C electricity represents carbon emissions from electricity consumption in the recycling process, C heat represents carbon emissions from heat consumption in the recycling process, C m represents carbon emissions from mechanical use, which is related to the carbon emission factor of mechanical energy consumption.

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

[0026] a first carbon emission reduction amount of carbon dioxide enrichment of pyrolysis gas produced by the high-temperature pyrolysis technology, which replaces coke oven gas;

[0027] a second carbon emission reduction amount of fuel oil produced by the catalytic cracking coupled in-situ upgrading technology, which replaces diesel oil;

[0028] a third carbon emission reduction amount of biogas produced by the high-temperature anaerobic fermentation technology, which replaces natural gas.

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

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

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

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

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

[0034] wherein C oil represents the second carbon emission reduction amount, P oil represents the yield of fuel oil, F oil and F diesel respectively represent the carbon emission factors of fuel oil and diesel oil;

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

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

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

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

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

[0040] a second carbon sequestration amount of functional carbon material produced by catalytic cracking coupled with in-situ upgrading technology;

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

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

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

[0044] wherein C fertilizer represents the first carbon sequestration amount, P fertilizer represents the production of carbon-based organic fertilizer, CC fertilizer represents the carbon content in carbon-based organic fertilizer, and BS represents the stability of carbon elements in carbon-based organic fertilizer.

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

[0046] C material = P material × CC material

[0047] wherein C material represents the second carbon sequestration amount, P material represents the production of functional carbon material, and CC material represents the carbon content of functional carbon material.

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

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

[0050] wherein C high quality oil represents the third carbon fixation amount, P high quality oil represents the yield of fuel oil, CC high quality oil represents the carbon content of fuel oil.

[0051] In some embodiments, in the fine processing stage of the household garbage fine utilization system, high-temperature anaerobic fermentation process is used to treat fermentable garbage to prepare biogas and organic fertilizer, and the biogas is used to replace natural gas; catalytic cracking coupled with in-situ upgrading process is used to treat plastic garbage to prepare hydrocarbon-rich gas, fuel oil and functional carbon materials, and the fuel oil is used to replace diesel oil; high-temperature pyrolysis process is used to treat fermentation residues and fiber garbage to prepare pyrolysis carbon, pyrolysis oil and pyrolysis gas, all of the pyrolysis oil and 50% of the pyrolysis gas achieve combustion self-heating, 50% of the pyrolysis gas is used for carbon dioxide enrichment together with the hydrocarbon-rich gas to replace coke oven gas, and the pyrolysis carbon is mixed with the organic fertilizer according to a proportion to prepare carbon-based organic fertilizer.

[0052] In a second aspect, the embodiments of the present application further provide a household garbage fine utilization system carbon emission accounting device based on a life cycle, comprising:

[0053] A first determination module is configured to determine a first carbon emission amount of transporting household garbage in a garbage collection and transportation stage.

[0054] A second determination module is configured to determine a second carbon emission amount in a fine processing stage based on carbon emission amounts released when different types of household garbage are treated by different recycling processes.

[0055] A third determination module is configured to determine a third carbon emission amount in a resource recycling stage based on a carbon emission reduction amount of fuel products and a carbon fixation amount of carbon fixation products generated in the fine processing stage.

[0056] An accounting module is configured to complete carbon emission accounting of the household fine utilization system based on the first carbon emission amount, the second carbon emission amount and the third carbon emission amount.

[0057] In a third aspect, the embodiments of the present application further provide an electronic device, comprising: at least one memory configured to store a program; and at least one processor configured to execute the program stored in the memory, and when the program stored in the memory is executed, the processor is configured to execute the method described in the first aspect or any possible implementation manner of the first aspect.

[0058] In a fourth aspect, the embodiments of the present application further provide a computer readable storage medium, and the computer readable storage medium stores a computer program, and when the computer program runs on a processor, the processor executes the method described in the first aspect or any possible implementation manner of the first aspect.

[0059] In a fifth aspect, the embodiments of the present application further provide a computer program product, which, when executed on a processor, causes the processor to perform the method described in the first aspect or any possible implementation manner of the first aspect.

[0060] The life cycle-based household garbage fine utilization system carbon emission accounting method provided by the embodiments of the present application combines the fine utilization scheme of household garbage recycling, quantitatively accounts for the carbon emission under the system life cycle in view of each link of household garbage collection and transportation, fine treatment, resource recycling, and the like, comprehensively considers the properties and characteristics of different types of garbage in household garbage, and adopts the recycling technology suitable for the same for processing, so as to achieve a more accurate carbon accounting purpose, thereby being capable of truly reflecting the carbon emission condition of each link and providing data support for the development of carbon emission related research. BRIEF DESCRIPTION OF DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the present application or related art, the following will briefly introduce the drawings needed to be used in the embodiments or related art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0062] Figure 1 is one of the process schematic diagrams of the life cycle-based household garbage fine utilization system carbon emission accounting method provided by the embodiments of the present application;

[0063] Figure 2 is the second process schematic diagram of the life cycle-based household garbage fine utilization system carbon emission accounting method provided by the embodiments of the present application;

[0064] Figure 3 is the structural schematic diagram of the life cycle-based household garbage fine utilization system carbon emission accounting device provided by the embodiments of the present application;

[0065] Figure 4 is the structural schematic diagram of the electronic device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will further describe the present application in combination with the 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 is one of the process schematic diagrams of the life cycle-based household garbage fine utilization system carbon emission accounting method provided by the embodiments of the present application, as Figure 1As shown, the method at least includes the following steps (Step):

[0068] S101, determining a first carbon emission of transporting household garbage in a garbage collection and transportation stage;

[0069] S102, determining a second carbon emission of a fine processing stage based on carbon emissions released when different types of household garbage are processed by different recycling processes;

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

[0071] S104, completing carbon emission accounting of the household fine utilization system based on the first carbon emission, the second carbon emission and the third carbon emission.

[0072] Specifically, the application scenario of the embodiment of the present application is a household garbage fine utilization system, and the fine utilization of household garbage involves the following three stages: a garbage collection and transportation stage, a fine processing stage and a resource recycling stage.

[0073] In the garbage collection and transportation stage, the collected household garbage is sorted and transported to a designated place, and the carbon emission of this stage mainly comes from the transportation of household garbage.

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

[0075] C t =∑A i L i Y i

[0076] Wherein, C t represents the first carbon emission of transporting household garbage in the garbage collection and transportation stage, and the unit is kg CO2 or t CO2; A i represents the transportation quantity of the i-th household garbage, and the unit is t; Y i represents the carbon emission factor of the unit turnover of the transportation equipment for transporting the i-th household garbage, and the unit is kg CO2 / (t·km); L i represents the transportation distance of the i-th household garbage, and the unit is km.

[0077] In the fine processing stage, different recycling processes are used to process different types of household garbage, and the carbon emission of this stage mainly comes 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 the indirect carbon emission in the fine processing stage;

[0080] The direct carbon emission includes carbon dioxide emissions released when different types of household garbage are processed using different recycling processes, and the indirect carbon emission includes carbon emissions generated by power consumption, heat consumption and mechanical use in the recycling process.

[0081] Specifically, in the fine processing stage, the direct source of carbon emission is mainly the carbon emission released in the process of each recycling process, and the indirect source is mainly the power consumption, heat energy and mechanical equipment used in the operation process. The direct carbon emission and the indirect carbon emission together constitute the second carbon emission in the fine processing stage.

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

[0083] The fermentable garbage is processed using a high-temperature anaerobic fermentation process;

[0084] The plastic garbage is processed using a catalytic cracking coupled with in-situ upgrading process;

[0085] The fermentation residues and the fiber garbage are processed using a high-temperature pyrolysis process.

[0086] Specifically, in the fine processing stage, considering the properties and characteristics of different types of garbage in household garbage, appropriate garbage recycling technologies are adopted for processing, so as to achieve more accurate carbon accounting.

[0087] Optionally, for fermentable garbage, a high-temperature anaerobic fermentation technology is adopted to prepare bio-gas and organic fertilizer, mainly preparing biogas slurry, biogas and biogas residue, to realize the replacement of natural gas by biogas. High-temperature anaerobic fermentation refers to the decomposition of organic matter into organic acid and gas and other substances through the metabolic process of microorganisms under the condition of high temperature. High-temperature anaerobic fermentation does not need additional heating equipment, only the heat generated by microbial metabolism can maintain the temperature of the fermentation process, thereby achieving the purpose of energy saving; the organic acid and gas and other substances generated can be used to produce organic fertilizer or bio-gas, etc., while reducing the generation of waste and being friendly to the environment.

[0088] Optionally, for plastic garbage, a catalytic cracking coupled with in-situ upgrading technology is adopted to convert plastic garbage into rich-hydrocarbon gas, fuel oil and functional carbon material. The fuel oil can replace diesel as high-quality oil, and the functional carbon material has a certain carbon sequestration capacity.

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

[0090] Optionally, for the fermentation residues and fiber waste, a high-temperature pyrolysis technology (specifically, a co-pyrolysis technology) is used to obtain pyrolysis three-state products. High-temperature pyrolysis refers to a process of pyrolyzing a substance under high-temperature conditions, which is mainly based on the thermal instability of molecules in the garbage. Under anaerobic or anoxic conditions, the organic matter is cracked by heating and distillation, and after condensation, various new forms such as gas, liquid and solid are formed. High-temperature pyrolysis can convert fermentation residues and fiber waste into valuable resources, including pyrolysis carbon, pyrolysis gas and pyrolysis oil, etc., realizing the recycling of resources, reducing environmental pollution, and significantly reducing the volume and mass of fiber waste.

[0091] Among them, the pyrolysis carbon has a certain carbon sequestration potential as a carbon sequestration product, and is mixed with the organic fertilizer prepared by high-temperature anaerobic fermentation (mainly referring to biogas residue) in a certain proportion to form a carbon-based organic fertilizer; all pyrolysis oil and 50% of the pyrolysis gas realize combustion self-heating; and the other 50% of the pyrolysis gas is enriched with CO2 to replace the energy supply of coke oven gas in cooperation with the rich hydrocarbon gas generated by the catalytic cracking coupling in-situ upgrading technology.

[0092] The three stages constitute the life cycle of the household garbage fine utilization system. The embodiments of the present application aim to comprehensively consider each stage in the process of fine utilization of household garbage and the influence between different stages, so as to realize the overall and accurate accounting of carbon emissions.

[0093] In some embodiments, the direct carbon emissions mainly include the carbon emissions released when different types of household garbage are treated by different recycling processes, which 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] Among them, D represents the direct carbon emissions, D 催化裂解 represents the carbon emissions generated by the catalytic cracking coupling in-situ upgrading process, D 高温热解 represents the carbon emissions generated by the high-temperature pyrolysis process, D 高温厌氧发酵 represents the carbon emissions generated by the high-temperature anaerobic fermentation process, and D 自供热represents the carbon emission of the pyrolysis oil and 50% of the carbon emission of the pyrolysis gas combustion heat supply generated by the high-temperature pyrolysis technology.

[0096] In some embodiments, the indirect carbon emission mainly includes the carbon emission generated by the consumption of electricity, consumption of heat and mechanical use in the recycling process, and satisfies the following calculation formula:

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

[0098] Wherein, C indirect represents the indirect carbon emission, C electricity represents the carbon emission generated by the consumption of electricity in the recycling process, C heat represents the carbon emission generated by the consumption of heat in the recycling process, C m represents the carbon emission generated by the mechanical use, which is related to the carbon emission factor of mechanical energy consumption.

[0099] Optionally, the carbon emission C m generated by the mechanical use satisfies the following calculation formula:

[0100] C m =∑E mj F mj

[0101] E mj =N mj W mj

[0102] Wherein, E mj is the energy consumption of the jth mechanical in the fine processing stage, with the unit of kW·h or kg; F mj is the carbon emission factor of the energy consumption of the jth mechanical, with the unit of kg CO2 / kW·h or kg CO2 / kg; N mj is the number of the jth mechanical, with the unit of sets; W mj is the energy consumption per set of the jth mechanical, with the unit of kW·h / set or kg / set.

[0103] In the resource recycling stage, the carbon emission reduction potential of the fuel product generated in the fine processing stage to replace the traditional fuel product and the carbon sequestration potential of part of the carbon sequestration product are calculated.

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

[0105] The first carbon emission reduction of the carbon dioxide enrichment of the rich-hydrocarbon gas generated by the catalytic cracking coupled in-situ upgrading technology and the pyrolysis gas generated by the high-temperature pyrolysis technology to replace the coke oven gas;

[0106] The second carbon emission reduction amount of fuel oil generated by the catalytic cracking coupling in-situ upgrading technology replacing diesel oil;

[0107] The third carbon emission reduction amount of biogas generated by the high-temperature anaerobic fermentation technology replacing natural gas.

[0108] Specifically, the energy supply of carbon dioxide enrichment of the pyrolysis gas generated by the catalytic cracking coupling in-situ upgrading technology and the pyrolysis gas generated by the high-temperature pyrolysis technology replaces the coke oven gas, and the reduced carbon emission amount meets the following calculation formula:

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

[0110] Wherein, C pyr-gas represents the first carbon emission reduction amount of pyrolysis / fuel-rich gas replacing traditional coke oven gas, P pyr-gas represents the yield of pyrolysis / fuel-rich gas, unit: kg; F pyr-gas and F gas respectively represent the carbon emission factors of pyrolysis / fuel-rich gas and coke oven gas, unit: kg CO2 / kg.

[0111] The fuel oil generated by the catalytic cracking coupling in-situ upgrading technology can replace diesel oil as high-quality oil, and the reduced carbon emission amount meets the following calculation formula:

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

[0113] Wherein, C oil represents the second carbon emission reduction amount of fuel oil replacing diesel oil, P oil represents the yield of fuel oil, unit: kg; F oil , F diesel represent the carbon emission factors of fuel oil and diesel oil, unit: kg CO2 / kg.

[0114] The biogas (mainly refers to biogas) generated by the high-temperature anaerobic fermentation technology can replace coal-based natural gas, and the reduced carbon emission amount meets the following calculation formula:

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

[0116] Wherein, C bio-gas represents the third carbon emission reduction amount of biogas replacing natural gas, P bio-gas represents the yield of biogas, unit: kg; Fbio-gas and F natural gas respectively represent the carbon emission factors of biogas and natural gas, with the unit of kgCO2 / kg.

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

[0118] a first amount of carbon sequestration of the carbon-based organic fertilizer mixed by the organic fertilizer produced by the high-temperature anaerobic fermentation technology and the pyrolysis carbon produced by the high-temperature pyrolysis technology;

[0119] a second amount of carbon sequestration of the functional carbon material produced by the catalytic cracking coupled with in-situ upgrading technology;

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

[0121] Specifically, the carbon-based organic fertilizer is mixed by the organic fertilizer produced by the high-temperature anaerobic fermentation technology and the pyrolysis carbon produced by the high-temperature pyrolysis technology in a certain proportion, and the first amount of carbon sequestration of the carbon-based organic fertilizer satisfies the following calculation formula:

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

[0123] wherein, C fertilizer represents the first amount of carbon sequestration of the carbon-based organic fertilizer; P fertilizer represents the yield of the carbon-based organic fertilizer, with the unit of kg; CC fertilizer represents the carbon content in the carbon-based organic fertilizer, with the unit of %; and BS represents the stability of carbon element in the carbon-based organic fertilizer, with the unit of %.

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

[0125] C material = P material × CC material

[0126] wherein, C material represents the second amount of carbon sequestration of the functional carbon material; P material represents the yield of the functional carbon material, with the unit of kg; and CC material represents the carbon content of the functional carbon material, with the unit of %.

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

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

[0129] wherein C high quality oil represents the third carbon fixation amount of the fuel oil; P high quality oil represents the yield of the fuel oil, in kg; CC high quality oil represents the carbon content of the fuel oil, in %.

[0130] The life cycle-based household garbage fine utilization system carbon emission accounting method provided by the embodiments of the present application combines the fine utilization scheme of household garbage recycling, quantitatively accounts for the carbon emissions under the system life cycle for each link of household garbage collection and transportation, fine processing, resource recycling, comprehensively considers the properties and characteristics of different types of garbage in household garbage (such as fermentable garbage, fiber garbage, and plastic garbage, etc.), and adopts the recycling technology suitable for the same (such as high-temperature pyrolysis, catalytic cracking coupled with in-situ upgrading, high-temperature anaerobic fermentation, etc.) to achieve the purpose of more accurate carbon accounting, so as to truly reflect the carbon emission situation of each link and provide data support for the development of carbon emission related research.

[0131] The technical scheme provided by the embodiments of the present application will be further described below through a specific example.

[0132] Figure 2 is a flowchart of the life cycle-based household garbage fine utilization system carbon emission accounting method provided by the embodiments of the present application, as shown in Figure 2 .

[0133] In the garbage collection and transportation stage, kitchen garbage, fiber and plastic garbage are sorted, a separate collection and transportation mode is adopted, point-to-point transportation is carried out, and the garbage is directly transported by a garbage truck to a collaborative processing plant at the source of garbage generation. It is assumed that the transportation distance from the garbage collection point to the processing plant is 20 km, the transportation tool is a 10t transportation vehicle 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. The specific data is substituted into the following calculation formula:

[0134] C t =∑A i L i Y i

[0135] wherein C t represents the first carbon emission amount of transporting household garbage in the garbage collection and transportation stage, in kg CO2 / t CO2; A i represents the transportation amount of the i-th household garbage, in t; Y i represents the carbon emission factor of the unit turnover amount of transportation equipment for transporting the i-th household garbage, in kg CO2 / (t·km).i represents the transportation distance of the i-th household garbage, in km. Thus, the carbon emission of the transportation stage is 0.66t CO2.

[0136] In the fine processing stage, 0.146 kg of kitchen garbage is used as raw material, and the fermentable part thereof is treated by high-temperature anaerobic fermentation technology to generate 0.117 kg of biogas slurry for aquatic culture, the carbon content of which is very small and almost zero, and the carbon emission thereof is not considered in the study; 0.024 kg of biogas is generated for replacing coal natural gas; 0.004 kg of biogas residue is generated, which is mixed with pyrolysis carbon at a certain proportion to make carbon-based organic fertilizer with a carbon sequestration rate of 1.95%.

[0137] 0.0523 kg of non-fermentable garbage and fiber garbage (proportion of 5:13) in the kitchen garbage is used as raw material, and co-pyrolysis technology is used to obtain pyrolysis products in three states, all pyrolysis oil and 50% pyrolysis gas realize combustion self-heating, and the other 50% pyrolysis gas is used for CO2 enrichment together with rich hydrocarbon gas to replace the energy supply of coke oven gas, and the pyrolysis carbon is mixed with the biogas residue at a certain proportion to make carbon-based organic fertilizer.

[0138] 0.0523 kg of plastic garbage is used as raw material, and the fuel oil generated by the catalytic cracking coupled with in-situ upgrading technology can replace diesel oil, and the rich hydrocarbon gas is used for CO2 enrichment together with the pyrolysis gas to replace the energy supply of coke oven gas.

[0139] In the resource recycling stage, the carbon emission reduction potential of the fuel products generated in the fine processing stage for replacing traditional fuel products and the carbon sequestration potential of part of the carbon sequestration products are calculated.

[0140] The technical scheme provided by the embodiments of the present application not only has high accuracy and operability in carbon emission calculation, but also can provide a scientific basis for optimizing the fine utilization of household garbage and promote the sustainable development of environmental protection.

[0141] Figure 3 is a structural schematic diagram of a carbon emission calculation device of a household garbage fine utilization system based on a life cycle provided by the embodiments of the present application, as shown in Figure 3 The device at least includes:

[0142] The first determination module 301 is configured to determine a first carbon emission of transporting household garbage in the garbage collection and transportation stage.

[0143] The second determination module 302 is configured to determine a second carbon emission of the fine processing stage based on the carbon emission released when different types of household garbage are treated by different recycling processes.

[0144] The third determination module 303 is configured to determine a third carbon emission amount of the resource recycling stage based on the carbon emission reduction amount of the fuel product and the carbon sequestration amount of the carbon sequestration product generated in the fine processing stage.

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

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

[0147] The first determination unit is configured to determine the second carbon emission amount based on a direct carbon emission amount and an indirect carbon emission amount of the fine processing stage.

[0148] The direct carbon emission amount includes carbon emission amounts released when different types of household garbage are processed by different recycling processes, and the indirect carbon emission amount includes carbon emission amounts generated by consumption of electricity, consumption of heat and mechanical use in the recycling process.

[0149] In some embodiments, processing different types of household garbage by different recycling processes includes:

[0150] Processing fermentable garbage by a high-temperature anaerobic fermentation process;

[0151] Processing plastic garbage by a catalytic cracking coupled with in-situ upgrading process;

[0152] Processing fiber garbage and fermentation residues by a high-temperature pyrolysis process.

[0153] In some embodiments, the direct carbon emission amount satisfies 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] D represents the direct carbon emission amount, D 催化裂解 represents the carbon emission amount generated by the catalytic cracking coupled with in-situ upgrading process, D 高温热解 represents the carbon emission amount generated by the high-temperature pyrolysis process, D 高温厌氧发酵 represents the carbon emission amount generated by the high-temperature anaerobic fermentation process, and D 自供热 represents the carbon emission amount generated by combustion of 50% of pyrolysis gas and all pyrolysis oil generated by the high-temperature pyrolysis technology for heat supply.

[0156] In some embodiments, the indirect carbon emission amount satisfies the following calculation formula:

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

[0158] wherein C indirect represents indirect carbon emissions, C electricity represents carbon emissions from electricity consumption in the recycling process, C heat represents carbon emissions from heat consumption in the recycling process, C m represents carbon emissions from mechanical use, which is related to the carbon emission factor of mechanical energy consumption.

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

[0160] a first carbon emission reduction amount of carbon dioxide enrichment of pyrolysis gas produced by the high-temperature pyrolysis technology, which replaces coke oven gas;

[0161] a second carbon emission reduction amount of fuel oil produced by the catalytic cracking coupled in-situ upgrading technology, which replaces diesel oil;

[0162] a third carbon emission reduction amount of biogas produced by the high-temperature anaerobic fermentation technology, which replaces natural gas.

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

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

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

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

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

[0168] wherein C oil represents the second carbon emission reduction amount, P oil represents the yield of fuel oil, F oil and F diesel respectively represent the carbon emission factors of fuel oil and diesel oil;

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

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

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

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

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

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

[0175] a third carbon fixation amount of fuel oil produced by the catalytic cracking coupled 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] wherein C fertilizer represents the first carbon fixation amount, P fertilizer represents the production of the carbon-based organic fertilizer, CC fertilizer represents the carbon content in the carbon-based organic fertilizer, and BS represents the stability of carbon elements in the carbon-based organic fertilizer.

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

[0180] C material = P material × CC material

[0181] wherein C material represents the second carbon fixation amount, P material represents the production of the functional carbon materials, and CC material represents the carbon content of the functional carbon materials.

[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] wherein Chigh qualityoil denotes the third carbon sequestration amount, P high quality iil denotes the yield of fuel oil, CC high quality oil denotes the carbon content of fuel oil.

[0185] In some embodiments, in the fine processing stage in the household garbage fine utilization system, high-temperature anaerobic fermentation process is used to treat fermentable garbage to prepare biogas and organic fertilizer, and the biogas is used to replace natural gas; catalytic cracking coupled with in-situ upgrading process is used to treat plastic garbage to prepare hydrocarbon-rich gas, fuel oil and functional carbon materials, and the fuel oil is used to replace diesel oil; high-temperature pyrolysis process is used to treat fermentation residues and fiber garbage to prepare pyrolysis carbon, pyrolysis oil and pyrolysis gas, all of the pyrolysis oil and 50% of the pyrolysis gas achieve combustion self-supply heat, 50% of the pyrolysis gas is used for carbon dioxide enrichment together with the hydrocarbon-rich gas to replace coke oven gas, and the pyrolysis carbon is mixed with the organic fertilizer according to a proportion to prepare carbon-based organic fertilizer.

[0186] It can be understood that the detailed function implementation of each unit / module described above can refer to the description in the foregoing method embodiments, which will not be described herein.

[0187] It should be understood that the above device is used to execute the method in the above embodiments, and the corresponding program modules in the device have similar implementation principles and technical effects to those described in the above method. The working process of the device can refer to the corresponding process in the above method, which will not be described herein.

[0188] Based on the method in the above embodiments, the embodiments of the present application provide an electronic device. The device can include at least one memory for storing programs and at least one processor for executing the programs stored in the memory. Wherein, when the program stored in the memory is executed, the processor is used to execute the method described in the above embodiments.

[0189] Figure 4 is a structural schematic diagram of an electronic device provided by the embodiments of the present application, as shown in Figure 4 The electronic device can include a processor 401, a communications interface 402, a memory 403 and a communications bus 404, wherein the processor 401, the communications interface 402 and the memory 403 complete mutual communication through the communications bus 404. The processor 401 can invoke software instructions in the memory 403 to execute the method described in the above embodiments.

[0190] In addition, the logic instructions in the memory 403 described above can be implemented in the form of a software function unit and sold or used as an independent product, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the related art or part of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the embodiments of the present application.

[0191] Based on the method in the above embodiments, the embodiments of the present application provide a computer readable storage medium, which stores a computer program, and when the computer program runs on a processor, the processor executes the method in the above embodiments.

[0192] Based on the method in the above embodiments, the embodiments of the present application provide a computer program product, and when the computer program product runs on a processor, the processor executes the method in the above embodiments.

[0193] It can be understood that the processor in the embodiments of the present application can be a central processing unit (CPU), and can also be 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 can be a microprocessor or any conventional processor.

[0194] The method steps in the embodiments of the present application can be implemented by means of hardware, or by means of a processor executing software instructions. The software instructions can be composed of corresponding software modules, which can be stored in a Random Access Memory (RAM), a flash memory, a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), a register, a hard disk, a mobile hard disk, a CD-ROM, or any other form of storage medium well 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 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, all or part of the embodiments can be implemented by means of software, hardware, firmware, or any combination thereof. When implemented by means of software, all or part of the embodiments can be implemented 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, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted by means of the computer-readable storage medium. The computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center by means of a wire (such as a coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media sets. The available media can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a Solid State Disk (SSD)), etc.

[0196] It can be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of differentiation, and do not limit the scope of the embodiments of the present application.

[0197] Those skilled in the art can easily understand that the above description is only the preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A life cycle-based household waste fine utilization system carbon emission accounting method, characterized by, The life cycle includes a garbage collection and transportation stage, a fine processing stage, and a resource recycling stage, and the method includes: determining a first carbon emission of the garbage collection and transportation stage for transporting household garbage; determining a second carbon emission of the fine processing stage based on carbon emissions released when different types of household garbage are processed by different recycling processes; determining a third carbon emission of the resource recycling stage based on carbon reduction of fuel products and carbon sequestration of carbon sequestration products generated by the fine processing stage; based on the first carbon emission, the second carbon emission and the third carbon emission, completing the carbon emission accounting of the household garbage fine utilization system; the determination of the second carbon emission of the fine processing stage includes: determining the second carbon emission based on direct carbon emission and indirect carbon emission of the fine processing stage; wherein the direct carbon emission includes carbon emissions released when different types of household garbage are processed by different recycling processes, and the indirect carbon emission includes carbon emissions generated by consumption of electricity, consumption of heat and mechanical use in the recycling process; the use of different recycling processes to process different types of household garbage includes: using high-temperature anaerobic fermentation process to process fermentable garbage; using catalytic cracking coupled with in-situ upgrading process to process plastic garbage; using high-temperature pyrolysis process to process fiber garbage and fermentation residue; the direct carbon emission satisfies the following calculation formula: wherein, represents the direct carbon emissions, represents the carbon emissions from catalytic cracking coupled with in-situ upgrading process, represents the carbon emissions from high temperature pyrolysis process, represents the carbon emissions from high temperature anaerobic fermentation process, represents the carbon emissions from the combustion of 50% of pyrolysis gas and all pyrolysis oil from high temperature pyrolysis technology for heat supply; the carbon reduction of the fuel product includes: the first carbon reduction of carbon dioxide enrichment of hydrocarbon gas generated by catalytic cracking coupled with in-situ upgrading technology and pyrolysis gas generated by high-temperature pyrolysis technology to replace coke oven gas; the second carbon reduction of fuel oil generated by catalytic cracking coupled with in-situ upgrading technology to replace diesel oil; the third carbon reduction of biogas generated by high-temperature anaerobic fermentation technology to replace natural gas; the carbon sequestration amount of the carbon sequestration product includes: the first carbon sequestration amount of carbon-based organic fertilizer mixed by organic fertilizer generated by high-temperature anaerobic fermentation technology and pyrolysis carbon generated by high-temperature pyrolysis technology; the second carbon sequestration amount of functional carbon material generated by catalytic cracking coupled with in-situ upgrading technology; the third carbon sequestration amount of fuel oil generated by catalytic cracking coupled with in-situ upgrading technology; the first carbon sequestration amount satisfies the following calculation formula: wherein, represents the first carbon sequestration amount, represents the yield of the carbon-based organic fertilizer, represents the carbon content in the carbon-based organic fertilizer, represents the stability of carbon elements in the carbon-based organic fertilizer; the second carbon sequestration amount satisfies the following calculation formula: wherein, represents the second carbon fixation amount, represents the yield of functional carbon material, represents the carbon content of functional carbon material; the third carbon sequestration amount satisfies the following calculation formula: wherein, represents the third carbon fixation amount, represents the yield of fuel oil, represents the carbon content of fuel oil.

2. The carbon accounting method of claim 1, wherein, the indirect carbon emission satisfies the following calculation formula: wherein, represents the indirect carbon emissions, represents the carbon emissions from the consumption of electricity in the recycling process, represents the carbon emissions from the consumption of heat in the recycling process, represents the carbon emissions from the use of machinery, related to the carbon emission factor of the machinery energy consumption.

3. The carbon accounting method of claim 1, wherein, the first carbon reduction amount satisfies the following calculation formula: wherein, represents the first carbon emission reduction amount, represents the yield of pyrolysis gas and hydrocarbon-rich gas; represents the carbon emission factor of pyrolysis gas and hydrocarbon-rich gas, represents the carbon emission factor of coke oven gas; the second carbon reduction amount satisfies the following calculation formula: wherein, represents the second carbon emission reduction amount, represents the production of fuel oil, and represents the carbon emission factor of fuel oil and diesel, respectively; the third carbon reduction amount satisfies the following calculation formula: wherein, represents the third carbon emission reduction amount, represents the production of biogas, and represents the carbon emission factor of biogas and natural gas, respectively.

4. The carbon accounting method according to any one of claims 1 to 3, characterized in that, In the fine processing stage of the household garbage fine utilization system, high-temperature anaerobic fermentation process is used to treat fermentable garbage to prepare biogas and organic fertilizer, and the biogas is used to replace natural gas; catalytic cracking coupled with in-situ upgrading process is used to treat plastic garbage to prepare hydrocarbon-rich gas, fuel oil and functional carbon materials, and the fuel oil is used to replace diesel oil; high-temperature pyrolysis process is used to treat fermentation residues and fiber garbage to prepare pyrolysis carbon, pyrolysis oil and pyrolysis gas, all the pyrolysis oil and 50% of the pyrolysis gas realize combustion self-heating, 50% of the pyrolysis gas is used for carbon dioxide enrichment together with the hydrocarbon-rich gas to replace coke oven gas, and the pyrolysis carbon is mixed with the organic fertilizer in a certain proportion to prepare carbon-based organic fertilizer.

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