Carbon footprint distribution method and device for air separation gas product, equipment and storage medium

Abstract

The invention provides a carbon footprint distribution method and device for an air separation gas product, equipment and a storage medium, and relates to the technical field of carbon footprint calculation. The carbon footprint distribution method comprises the following steps: determining a system boundary and a functional unit; determining a ratio of a yield of each of the air separated gas products to a total yield of the air separated gas products; determining the carbon emission generated in the system boundary based on the functional unit; and distributing the carbon emission according to the proportion so as to determine the carbon footprint of each air separation gas product. According to the carbon footprint distribution method provided by the invention, the system boundary of the industrial gas carbon footprint and other environmental performance is clearly calculated, reasonable carbon emission distribution is carried out on multiple different forms of symbiotic products, and a rule system for perfecting carbon accounting of air separation gas products is established.

Description

Technical Field

[0001] The present application relates to the technical field of carbon footprint calculation, and in particular to a method and apparatus, device, and storage medium for allocating carbon footprint of air separation gas products. Background Art

[0002] Air separation gas products are widely used in the production process of steel, petrochemical, electronic products and other industrial industries. They are an important link and component of product carbon footprint calculation, and their carbon footprint has a direct impact on the calculation results of the carbon footprint of major products. Taking the current production situation of my country's steel enterprises as an example, the current oxygen production process generally has problems such as high power consumption, low energy medium utilization, and large-scale gas emission, which is not conducive to cost control and also increases carbon emissions in the production process.

[0003] For industrial gases represented by air separation gas, accurately calculating and reasonably allocating the carbon footprint of various co-existing gas products from a life cycle perspective is of great significance to improving the carbon footprint accounting of various major industrial products throughout their life cycle.

[0004] In the existing technology, the life cycle assessment and carbon emission allocation of co-products for air separation gas products involved in industrial production processes are mainly based on the general procedures and methodology of ISO 14044. There is a lack of specific and clear regulations for such products. In practice, operators are required to make judgments based on experience. For the allocation of co-products, the procedures specified in ISO 14044 are as follows: first, avoid allocation; second, when allocation is unavoidable, the input and output of the system should be divided into different products or functions in a way that reflects their potential physical relationship; finally, when the physical relationship cannot be established or cannot be used alone as the basis for allocation, the input and output data can be allocated to the co-products in proportion to the economic value of the product.

[0005] However, since the production of industrial gases is often accompanied by multiple products in different physical states (such as gaseous and liquid oxygen, nitrogen, and argon), and the division of distribution and single product processes cannot be avoided, physical distribution and economic distribution become the main methods to be considered. The physical distribution method requires that the co-products of different types and physical states be converted to a certain benchmark equivalent, such as the ferrous metallurgical industry standard "Calculation Method for Air Separation Energy Consumption Allocation in the Iron and Steel Industry YB / T 4560-2016" based on The Shanghai local standard "Industrial Gas Air Separation Unit Product Energy Consumption Limit DB31 / 757-2013" converts various gases based on oxygen equivalent. The implementation of the economic allocation method mainly depends on the actual procurement of enterprises and market supply and demand. In actual operation, it is more uncertain and less comparable, so it is rarely used.

[0006] At present, there are no unified standards and technical specifications for carbon footprint accounting or life cycle assessment of industries such as oxygen and hydrogen production in the industry. Different operators have different life cycle stages and system boundaries divided according to their experience. For the situation where air separation gas produces multiple products such as oxygen, nitrogen, argon, liquid oxygen, liquid nitrogen, liquid argon, etc., the equivalent conversion methods and co-product allocation methods in different regions and industries have not yet been unified. The allocation and processing methods for non-gaseous by-products such as waste heat, waste pressure, and solid substances are unclear, resulting in weak comparability between calculation results, which will increase the uncertainty of the carbon footprint results of the main process products and interfere with the analysis and tracing of emission hotspots. Summary of the invention

[0007] In order to solve at least one of the above problems, the present application proposes a method and apparatus, device, and storage medium for allocating carbon footprint of air separation gas products.

[0008] According to the first aspect of the present application, at least one embodiment of the present application provides a method for allocating carbon footprints for air separation gas products, including: determining system boundaries and functional units; determining the carbon emissions generated within the system boundaries based on the functional units; determining the proportion of the output of each air separation gas product in the air separation gas products to the total output of the air separation gas products; allocating the carbon emissions according to the proportion to determine the carbon footprint of each air separation gas product.

[0009] For example, in some embodiments of the present application, the functional unit is a first set volume, and the carbon footprint allocation method is used to allocate the carbon emissions of the air separation gas product of the first set volume.

[0010] For example, in some embodiments of the present application, the system boundary includes: upstream processes, including: the process of obtaining raw materials for the production of the air separation gas product, energy mining, processing and transportation to the air separation gas product production line; core processes, including: the process of producing the air separation gas product.

[0011] For example, in some embodiments of the present application, determining the proportion of the output of each air separation gas product in the air separation gas products to the total output of the air separation gas products includes: determining the pressure level and output of each air separation gas product; determining the converted oxygen equivalent of each air separation gas product based on the pressure level and output and based on the high-pressure gas oxygen equivalent conversion method; summing the converted oxygen equivalent of each air separation gas product to obtain the total output of the air separation gas products; and dividing the converted oxygen equivalent of each air separation gas product by the total output of the air separation gas products to determine the corresponding proportion.

[0012] For example, in some embodiments of the present application, the converted oxygen equivalent of each air separation gas product is determined according to the pressure level and output based on the high-pressure gas oxygen equivalent conversion method, including: converting the output of each air separation gas product according to a set coefficient; determining the conversion coefficient of impure oxygen gas according to an energy consumption formula, and converting the output of the impure oxygen gas according to the conversion coefficient.

[0013] For example, in some embodiments of the present application, the conversion coefficient is calculated according to the following formula:

[0014] α=[A+(B×CD) / P]÷B

[0015] Wherein, α is the conversion coefficient, A is the separation energy consumption of the impure oxygen gas, B is the first separation energy consumption of pure oxygen, C is the pressure correction coefficient, D is the second separation energy consumption of pure oxygen, and P is the oxygen purity of the impure oxygen gas.

[0016] For example, in some embodiments of the present application, the pressure correction coefficient is determined according to the pressure of the impure oxygen gas.

[0017] According to the second aspect of the present application, at least one embodiment of the present application provides a carbon footprint allocation device for air separation gas products, which is used to execute the carbon footprint allocation method as described in any one of the first aspects, and the carbon footprint allocation device includes: a definition unit, used to determine the system boundary and the functional unit; a calculation unit, used to determine the proportion of the output of each air separation gas product in the air separation gas products to the total output of the air separation gas products; and used to determine the carbon emissions generated within the system boundary based on the functional unit; and allocate the carbon emissions according to the proportion to determine the carbon footprint of each air separation gas product.

[0018] According to the third aspect of the present application, at least one embodiment of the present application provides an electronic device, comprising: one or more processors; a memory for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors execute a method as described in any one of the first aspects.

[0019] According to a fourth aspect of the present application, at least one embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the method as described in any one of the first aspects.

[0020] Through the above exemplary embodiments, the present application provides a method and device for allocating carbon footprints of air separation gas products, which has at least one of the following beneficial effects:

[0021] 1. Accuracy: This application refers to the Shanghai local standard "Industrial Gas Air Separation Unit Product Energy Consumption Limit DB31 / 757-2013", in which the energy consumption allocation of co-products is based on equivalent oxygen (high-pressure oxygen), which is consistent with the standard method used in air separation gas production statistical indicators and carbon emission accounting, and is more accurate for such products.

[0022] 2. Universality: The calculation formula and conversion coefficient of the reference standard of this application cover a wide range of co-products, including impure oxygen, compressed air, rare gases, etc., and are practical and universal; while the ferrous metallurgy industry standard only has calculation and conversion formulas for liquid and gaseous oxygen, nitrogen and argon, and the calculation of other products requires the use of thermodynamic formulas and parameters. This standard is applicable to different air separation production processes (cryogenic and pressure-switching methods, etc.) and is extensive; while the ferrous metallurgy industry standard is only applicable to cryogenic distillation methods.

[0023] 3. Practicality: This application can help to quickly model and calculate carbon emissions for energy-assisted processes such as oxygen, nitrogen and argon production in industrial production, clearly calculate various air separation gases and quote them to the main process to support more accurate carbon footprint and environmental impact calculation and evaluation of products. At the same time, the method of this application is also in line with the development concept of circular economy, and scientifically allocates carbon emissions of symbiotic products such as liquid oxygen, nitrogen and argon, which helps the production end to examine the carbon emission flow of the overall process from a more comprehensive perspective, and guides and promotes resource recycling and economic sustainable development.

[0024] Compared with the existing technology, the carbon footprint allocation method of the present application clearly calculates the system boundaries of the carbon footprint of industrial gases and other environmental performance, and reasonably allocates carbon emissions for various forms of co-products, establishes and improves a rule system for carbon accounting of air separation gas products, helps to more accurately calculate the carbon footprint of various major industrial products and accurately analyze the sources of carbon emissions, so as to promote the energy-saving and carbon-reduction optimization and adjustment of the process. It not only improves the accuracy of carbon footprint allocation, but also simplifies the calculation process and improves work efficiency. It has broad application prospects and is an accurate and simple carbon footprint allocation method.

[0025] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By describing in detail exemplary embodiments thereof with reference to the accompanying drawings, the above and other objects, features and advantages of the present application will become more apparent. The accompanying drawings described below are only some embodiments of the present application, and are not intended to limit the present application.

[0027] Figure 1 A flow chart showing a carbon footprint allocation method for air separation gas products according to an exemplary embodiment;

[0028] Figure 2 A schematic diagram showing the system boundary of an exemplary embodiment;

[0029] Figure 3 A schematic diagram showing a carbon footprint distribution apparatus for air separation gas products according to an exemplary embodiment;

[0030] Figure 4 A structural diagram of an electronic device provided by the present application is shown. DETAILED DESCRIPTION

[0031] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0032] The described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of these specific details, or other modes, components, materials, devices, etc. may be adopted. In these cases, known structures, methods, devices, implementations, materials or operations will not be shown or described in detail.

[0033] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0034] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0035] Those skilled in the art will appreciate that the drawings are merely schematic diagrams of example embodiments, and the modules or processes in the drawings are not necessarily necessary for implementing the present application, and therefore cannot be used to limit the scope of protection of the present application.

[0036] Figure 1 A flow chart showing a method for carbon footprint allocation for air separation gas products according to an exemplary embodiment is shown.

[0037] The carbon footprint allocation method of this application is applicable to common industrial gas products, including general industrial gases and special gases. General industrial gases mainly refer to gases with large production and sales volume, low purity requirements, and large-scale industrial applications, such as air separation gases oxygen, nitrogen, and argon; special gases have higher requirements, such as high-purity, ultra-high-purity, standard calibration gases, and mixed gases. The carbon footprint allocation method of this application is applicable to common industrial gas production processes, including:

[0038] - Air separation method to produce air separation gas oxygen (O 2 ), nitrogen (N 2 ), argon (Ar), rare gases neon (Ne), helium (He), krypton (Kr), xenon (Xe), etc.;

[0039] -Chemical production of nitrogen (N 2 ), oxygen (O 2 ) and argon (Ar);

[0040] - Coal-to-hydrogen (H 2 ), coal gas and analytical gas to produce hydrogen (H 2 ), electrolysis to produce hydrogen (H 2 );

[0041] - Hydrocarbon steam reforming, partial oxidation to produce carbon monoxide (CO) and ammonia refrigeration, natural gas desulfurization to produce carbon dioxide (CO 2 ).

[0042] like Figure 1 As shown, the carbon footprint allocation method for air separation gas products includes: steps S101 to S104.

[0043] In step S101 , system boundaries and functional units are determined.

[0044] Based on the life cycle assessment theory and the actual production of air separation gases, the functional units and system boundaries are delineated, and the comprehensive environmental impact of the "cradle to gate" life cycle stage of air separation gas production from upstream raw materials to on-site production and manufacturing is comprehensively considered, providing boundary division at the specific process level.

[0045] The functional unit is a first set volume, and the carbon footprint allocation method is used to allocate the first set volume of air separation gas products. For example, if the functional unit is set to 1,000 standard cubic meters (km3N), the carbon footprint allocation method of the present application is to allocate the carbon footprint of 1,000 standard cubic meters (km3N) of industrial gas products that are manufactured and transported out of the factory (manufacturer) gate.

[0046] The system boundary includes: upstream process and core process. The upstream process includes: the process of obtaining raw materials for air separation gas products, energy mining, processing and transportation to the air separation gas product production line. The core process includes: the process of producing air separation gas products.

[0047] For example, the system boundary is: the entire production process from the entry of air or other raw materials into the industrial gas manufacturing device to the metering of qualified gas products to the pipeline, gas cylinder or storage tank at the gate of the industrial gas manufacturer.

[0048] like Figure 2 As shown in the figure, for the common air separation process of producing oxygen, nitrogen and argon, a clear system boundary is provided to the process: this boundary starts from the extraction of air and fuel, and goes through pretreatment, air compressors, filters, air-cooling towers, adsorbers, expanders, air separation towers, water-cooling towers, condensers, evaporators, compressors, gas purification / synthesis, filling and distribution to produce air separation products (such as nitrogen, argon and other inert gases, etc.), and also includes the energy and public auxiliary processes within the factory and the transportation process.

[0049] In step S102, the proportion of the output of each air separation gas product in the air separation gas products to the total output of the air separation gas products is determined.

[0050] One or more co-products may be produced during the production of industrial gases. The type and quantity of co-products depend on the type of gas, production process and equipment configuration. Generally, these co-products have economic value and can be reused, such as gaseous and liquid oxygen, nitrogen and argon, compressed gas, waste heat, etc., while other co-products may need to be treated and disposed of to meet environmental regulations.

[0051] Step S102 includes:

[0052] Step S1021, determining the pressure level and output of each air separation gas product.

[0053] According to some embodiments, the air separation gas products include: gaseous oxygen, gaseous nitrogen, gaseous argon, liquid oxygen, liquid nitrogen, liquid argon, compressed gas, and impure oxygen gas.

[0054] Step S1022, according to the pressure level and output, based on the high-pressure gas oxygen equivalent conversion method, determine the converted oxygen equivalent of each air separation gas product.

[0055] As shown in Table 1 below, the high-pressure gas oxygen equivalent conversion method includes: converting the output of gas oxygen, gas nitrogen, gas argon, liquid oxygen, liquid nitrogen, liquid argon and compressed gas of each air separation gas product according to the set coefficient. And determining the conversion coefficient of impure oxygen gas according to the energy consumption formula, and converting the output of impure oxygen gas according to the conversion coefficient.

[0056]

[0057]

[0058] Table 1 Conversion Coefficient Table for the Distribution Method of Product Output in the Industrial Gas Production Process

[0059] In Table 1, the high-pressure gaseous oxygen (GOXHP, 2.4 MPa < P ≤ 7.0 MPa) exiting the air separation unit is used as the reference product, so its output conversion coefficient is 1.00. The output conversion coefficient values of other products for high-pressure gaseous oxygen (GOXHP, 2.4 MPa < P ≤ 7.0 MPa) are listed in the table respectively.

[0060] For impure oxygen gas products with an oxygen purity lower than the technical index requirements specified in GB / T 3863, the conversion coefficient of the impure oxygen gas is calculated according to the following formula:

[0061] α = [A + (B × C - D) / X] ÷ B

[0062] Where α is the conversion coefficient, A is the separation energy consumption of the impure oxygen gas, GOX = 0.32 kWh / Nm3; B is the first separation energy consumption of pure oxygen, GOX 纯 (4.0 MPa) = 0.5251 kWh / Nm3; C is the pressure correction coefficient, D is the second separation energy consumption of pure oxygen, GOX = 0.3417 kWh / Nm3; X is the oxygen purity of the impure oxygen gas, in percentage.

[0063] According to the exemplary embodiment, different pressure correction coefficients can be obtained according to the pressure of the impure oxygen gas, as described below:

[0064] Low-pressure gas LP (P ≤ 0.8 Mpa), C = 0.76

[0065] Medium-pressure gas MP (0.8 MPa < P ≤ 2.4 Mpa), C = 0.9

[0066] High-pressure gas HP (2.4 MPa < P ≤ 7.0 Mpa), C = 1

[0067] Ultra-high-pressure gas VHP (P > 7.0 Mpa), C = 1.1

[0068] Step S1023, sum up the equivalent oxygen amounts of each air separation gas product to obtain the total output of the air separation gas products.

[0069] V E = α 1 GOX + α 2 GAN + α 3 LOX + α4 LAR+...α n K r &X e

[0070] Among them, V E is the total output of air separation gas products, in standard cubic meters (Nm3), α 1 , α 2 , α 3 , α 4 , ..., α n , is the setting coefficient of the corresponding product, GOX, GAN, LOX, LAR, ..., Kr&Xe are the outputs of the corresponding products, refer to the local standards of comprehensive power consumption limit and calculation method of industrial gas air separation unit products in Zhejiang Province, Jiangsu Province and Shanghai City, take low-pressure oxygen (0.1MPa≤GOX≤0.8MPa) as the benchmark product, and the standard product output conversion coefficient is shown in Table 1.

[0071] Step S1024, dividing the converted oxygen equivalent of each air separation gas product by the total output of the air separation gas product to determine the corresponding proportion.

[0072] In step S103 , the carbon emissions generated within the system boundary are determined based on the functional units.

[0073] According to the system boundaries defined above, data collection and collation are carried out on the production process of the target product. Based on the internationally accepted CML-IA baseline environmental impact assessment system (comprehensively considering 11 environmental impact categories), or according to the actual needs of the project, the IPCC GWP100a method can be used to focus on calculating carbon emissions and obtain the carbon emission results of the overall process of producing mixed symbiotic products. For example, the carbon footprint of 1,000 standard cubic meters (km3N) of industrial gas products that are manufactured and transported out of the factory (manufacturer) gate is determined.

[0074] According to some embodiments, the order of step S102 and step S103 can be replaced, that is, the carbon emissions are determined first, and then the proportion of each air separation gas product is determined. This application only takes this as an example, but is not limited to this.

[0075] In step S104, the carbon emissions are allocated according to the proportions to determine the carbon footprint of each air separation gas product.

[0076] The present application provides a carbon footprint allocation method for air separation gas products, which clearly calculates the system boundaries of industrial gas carbon footprint and other environmental performance, and reasonably allocates carbon emissions for co-products in various forms, establishes and improves a rule system for carbon accounting of air separation gas products, helps to more accurately calculate the carbon footprint of various major industrial products and accurately analyze the sources of carbon emissions, so as to promote energy-saving and carbon-reduction optimization and adjustment of the process, which not only improves the accuracy of carbon footprint allocation, but also simplifies the calculation process and improves work efficiency. It has broad application prospects and is an accurate and simple carbon footprint allocation method.

[0077] Embodiment 1

[0078] Taking an air separation gas production enterprise as an example, the specific steps are as follows:

[0079] The first step is to define the functional units and system boundaries of the target product, air separation. According to the production process and flow of air separation gas, the functional unit of accounting is set to 1,000 cubic meters of air separation gas products that are manufactured and transported out of the factory gate; the system boundary of the 1,000 cubic meters of air separation gas product life cycle in this application is divided into two stages: the upstream process, including the stage from the acquisition of raw and auxiliary materials for production, energy mining, processing and transportation to the gate of the air separation gas production plant; the core process, which refers to the main production activities within the air separation gas production plant. The system boundary does not include downstream processes, i.e., product use and the end of product life.

[0080] In the second step, the inventory data of input and output materials were collected according to the system boundary with a time scale of 1 year. The air separation gas production process mainly consumes electricity and steam. Taking the IPCC GWP 100a method as an example, the overall carbon emissions of the process were calculated based on energy consumption and carbon emission factors. The data and calculation results are shown in Table 2. The annual overall process carbon emissions are 836,392,952 kg CO 2 eq.

[0081]

[0082] Table 2 Energy consumption (input) of air separation gas production process

[0083] The third step is to convert the output of eight co-products involved in the process, namely low-pressure oxygen, high-pressure oxygen, medium-pressure nitrogen, high-pressure nitrogen, high-pressure argon, liquid oxygen, liquid nitrogen and liquid argon, into high-pressure oxygen equivalent according to the Shanghai local standard "Energy Consumption Limit for Industrial Gas Air Separation Units DB31 / 757-2013", and calculate the distribution ratio of each co-product based on the converted oxygen equivalent. The total carbon emissions of 836,392,952 kg CO 2eq. is allocated to each symbiotic product, and finally the carbon emissions allocated to each type of symbiotic product are divided by the actual output to obtain the carbon emissions of the functional unit (1,000 cubic meters) of each type of symbiotic product, that is, the carbon footprint of the target product, as shown in Table 3.

[0084]

[0085]

[0086] Table 3 Air separation gas oxygen equivalent conversion, distribution coefficient and carbon emission distribution

[0087] The present application also provides a carbon footprint distribution device for air separation gas products, such as Figure 3 As shown, the carbon footprint allocation device includes: a definition unit 301 and a calculation unit 302 .

[0088] The definition unit 301 is used to determine the system boundary and functional units.

[0089] The calculation unit 301 is used to determine the proportion of the output of each air separation gas product in the air separation gas product to the total output of the air separation gas product; and to determine the carbon emissions generated within the system boundary based on the functional units; and to allocate the carbon emissions according to the proportion to determine the carbon footprint of each air separation gas product.

[0090] The carbon footprint allocation device is used to execute the method as described above, so it will not be described in detail here.

[0091] Figure 4 A structural diagram of an electronic device provided by the present application is shown.

[0092] See also Figure 4 , Figure 4 An electronic device is provided, comprising a processor and a memory. The memory stores computer instructions, and when the computer instructions are executed by the processor, the processor executes the computer instructions to achieve the following Figure 1 The method and refinement scheme shown.

[0093] It should be understood that the above-mentioned device embodiments are only illustrative, and the device disclosed in the present application can also be implemented in other ways. For example, the division of units / modules in the above-mentioned embodiments is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units, modules or components can be combined, or can be integrated into another system, or some features can be ignored or not executed.

[0094] In addition, unless otherwise specified, each functional unit / module in each embodiment of the present application may be integrated into one unit / module, each unit / module may exist physically separately, or two or more units / modules may be integrated together. The above-mentioned integrated unit / module may be implemented in the form of hardware or in the form of a software program module.

[0095] If the integrated unit / module is implemented in the form of hardware, the hardware may be a digital circuit, an analog circuit, etc. The physical implementation of the hardware structure includes but is not limited to transistors, memristors, etc. Unless otherwise specified, the processor or chip may be any appropriate hardware processor, such as CPU, GPU, FPGA, DSP, and ASIC, etc. Unless otherwise specified, the on-chip cache, off-chip memory, and storage may be any appropriate magnetic storage medium or magneto-optical storage medium, such as Resistive Random Access Memory (RRAM), Dynamic Random Access Memory (DRAM), Static Random Access Memory (SRAM), Enhanced Dynamic Random Access Memory (EDRAM), High-Bandwidth Memory (HBM), Hybrid Memory Cube (HMC), etc.

[0096] If the integrated unit / module is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a memory and includes several 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 various embodiments of the present disclosure. The aforementioned memory includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0097] The present application also provides a non-transitory computer storage medium storing a computer program. When the computer program is executed by multiple processors, the processors execute the following Figure 1 The method and refinement scheme shown.

[0098] It should be clearly understood that the present application describes how to form and use specific examples, but the present application is not limited to any details of these examples. On the contrary, based on the teaching of the content disclosed in the present application, these principles can be applied to many other embodiments.

[0099] In addition, it should be noted that the above figures are only schematic illustrations of the processes included in the method according to the exemplary embodiments of the present application, and are not intended to be limiting. It is easy to understand that the processes shown in the above figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0100] The exemplary embodiments of the present application are specifically shown and described above. It should be understood that the present application is not limited to the detailed structures, configurations or implementations described herein; on the contrary, the present application is intended to cover various modifications and equivalent configurations included within the objectives and scope of the appended claims.

Claims

1. A method for allocating carbon footprint of air separation gas products, characterized in that: include: Determine system boundaries and functional units; Determining the proportion of the output of each of the air separation gas products to the total output of the air separation gas products; determining carbon emissions generated within the system boundary based on the functional unit; The carbon emissions are allocated according to the percentages to determine a carbon footprint of each of the air separation gas products.

2. The carbon footprint allocation method according to claim 1, characterized in that: The functional unit is a first set volume, and the carbon footprint allocation method is used to allocate the carbon emission of the air separation gas product of the first set volume.

3. The carbon footprint allocation method according to claim 1, characterized in that: The system boundaries include: Upstream processes, including: The process of obtaining raw materials for the production of the air separation gas product, energy mining, processing and transportation to the air separation gas product production line; Core processes include: A process for producing said air separation gas product.

4. The carbon footprint allocation method according to claim 1, characterized in that: Determining the proportion of the output of each of the air separation gas products to the total output of the air separation gas products includes: determining the pressure level and production volume of each of the air separation gas products; According to the pressure level and output, based on the high-pressure gas oxygen equivalent conversion method, determine the converted oxygen equivalent of each air separation gas product; Sum the converted oxygen equivalent of each of the air separation gas products to obtain the total output of the air separation gas products; The converted oxygen equivalent of each air separation gas product is divided by the total output of the air separation gas product to determine the corresponding proportion.

5. The carbon footprint allocation method according to claim 4, characterized in that: Determining the converted oxygen equivalent of each air separation gas product according to the pressure level and the output based on the high-pressure gas oxygen equivalent conversion method includes: Converting the output of each air separation gas product according to a set coefficient; The conversion coefficient of the impure oxygen gas is determined according to the energy consumption formula, and the output of the impure oxygen gas is converted according to the conversion coefficient.

6. The carbon footprint allocation method according to claim 5, characterized in that: The conversion factor is calculated according to the following formula: α=[A+(B×CD) / P]÷B Wherein, α is the conversion coefficient, A is the separation energy consumption of the impure oxygen gas, B is the first separation energy consumption of pure oxygen, C is the pressure correction coefficient, D is the second separation energy consumption of pure oxygen, and P is the oxygen purity of the impure oxygen gas.

7. The carbon footprint allocation method according to claim 6, characterized in that: The pressure correction coefficient is determined according to the pressure of the impure oxygen gas.

8. A carbon footprint distribution device for air separation gas products, characterized in that: Used to perform the carbon footprint allocation method according to any one of claims 1 to 7, the carbon footprint allocation device comprises: Defined units, used to determine system boundaries and functional units; A calculation unit is used to determine the proportion of the output of each air separation gas product in the air separation gas products to the total output of the air separation gas products; and to determine the carbon emissions generated within the system boundary based on the functional units; and to allocate the carbon emissions according to the proportion to determine the carbon footprint of each air separation gas product.

9. An electronic device, characterized in that: include: one or more processors; A memory for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors perform the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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