Carbon emission calculation method and device and storage medium

Abstract

The invention discloses a carbon emission calculation method and device and a storage medium, and the method comprises the steps: calculating an unknown energy emission factor according to the number of different types of energy consumed by different types of devices of a target enterprise in a preset time period and a known energy emission factor; wherein the type is obtained by dividing according to the effect of the device in energy conversion; and for each type of device, according to the consumption quantity of the current energy and the emission factor of the current energy of the type of device in the preset time period, calculating the carbon emission of the current energy consumed by the type of device in the preset time period. Through the scheme, the carbon emission accounting granularity can be refined to the device level, a carbon emission factor library of an enterprise is established, and the emission conditions of different energy sources of the enterprise are checked.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to, but are not limited to, the field of carbon emission technologies, and particularly relate to a carbon emission calculation method, device, and storage medium. Background Art

[0002] Currently, when refineries calculate carbon dioxide emissions, the boundary is the entire plant, and the direct fuel combustion emissions, indirect emissions, petrochemical process emissions, and CO 2 recovery, etc. are calculated as a whole.

[0003] For refineries with self-owned power plants, heat stations, etc., although the actual emission situation of energy is considered in the calculation of the emission factors of indirect energy such as electricity, steam, nitrogen, and wind, the logic of actual energy conversion is complex and there is no unified method, resulting in the inability to compare the energy emission factors between different enterprises.

[0004] In addition, in related technologies, carbon emissions mainly target petrochemical products, and the perspective of carbon emission accounting is mainly the product. Although the carbon emissions of petrochemical units are proposed, the problems of calculating the carbon emissions at the whole-plant boundary and the granularity of calculating the carbon emissions at the unit boundary cannot be solved. Due to the complex types of units, the sum of the carbon emissions of all units may also be inconsistent with the carbon emissions of the whole plant. Summary of the Invention

[0005] The following is an overview of the subject matter described in detail in this article. This overview is not intended to limit the scope of protection of the claims.

[0006] The present disclosure provides a carbon emission calculation method, device, and storage medium, which refine the granularity of carbon emission accounting of an enterprise to the unit level, and achieve refined measurement of the carbon emissions of the target enterprise.

[0007] An embodiment of the present disclosure provides a carbon emission calculation method, including:

[0008] Calculating an unknown energy emission factor according to the quantity of different types of energy consumed by different types of units of a target enterprise in a predetermined time period and a known energy emission factor; wherein, the types are obtained by dividing according to the role of the unit in energy conversion;

[0009] For each type of unit, respectively calculating the carbon emissions of the unit consuming the current energy in the predetermined time period according to the quantity of the current energy consumed by the unit of this type in the predetermined time period and the emission factor of the current energy.

[0010] An embodiment of the present disclosure further provides a carbon emission calculation device, including: a memory and a processor;

[0011] The memory is used to store a program for carbon emission calculation;

[0012] The processor is configured to read the program for carbon emission calculation and execute the carbon emission calculation method as described in any embodiment of the present disclosure.

[0013] An embodiment of the present disclosure also provides a non-transitory computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, is capable of implementing the carbon emission calculation method as described in any embodiment of the present disclosure.

[0014] Compared with the related art, the carbon emission calculation method, device, and storage medium provided by the embodiments of the present disclosure divide the devices of a target enterprise into different types according to the roles of the devices in energy conversion, calculate unknown energy emission factors based on the quantities of different types of energy consumed by different types of devices of the target enterprise during a predetermined time period and known energy emission factors, and finally obtain the emission factors of all types of energy of the enterprise, thereby being able to obtain the carbon emissions generated by different types of devices consuming different types of energy. The carbon emission calculation method of this embodiment refines the carbon emission accounting granularity of the enterprise to the device level, realizing a refined measurement of the carbon emissions of the target enterprise.

[0015] Other features and advantages of the embodiments of the present application will be described in the subsequent description, and part of them will become obvious from the description, or be understood by implementing the embodiments of the present application. The objectives and other advantages of the embodiments of the present application can be achieved and obtained through the structures specifically pointed out in the description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide an understanding of the technical solutions of the present disclosure, and constitute a part of the description. They are used together with the embodiments of the present disclosure to explain the technical solutions of the present disclosure, and do not constitute a limitation to the technical solutions of the present disclosure.

[0017] Figure 1 It is a flowchart of the carbon emission calculation method according to an embodiment of the present disclosure;

[0018] Figure 2 It is a schematic structural diagram of a refinery according to an embodiment of the present disclosure;

[0019] Figure 3 It is a specific flowchart of the carbon emission calculation method according to an embodiment of the present disclosure;

[0020] Figure 4 It is a flowchart of verifying the carbon emission calculation method according to an embodiment of the present disclosure;

[0021] Figure 5 It is a schematic diagram of the carbon emission calculation device according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present disclosure describes multiple embodiments, but the description is exemplary rather than restrictive, and it will be apparent to those of ordinary skill in the art that there can be more embodiments and implementation solutions within the scope of the embodiments described in the present disclosure. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically restricted, any feature or element of any embodiment can be used in combination with any other feature or element in any other embodiment, or can replace any other feature or element in any other embodiment.

[0023] The present disclosure includes and contemplates combinations with features and elements known to those of ordinary skill in the art. The embodiments, features, and elements already disclosed in the present disclosure can also be combined with any conventional features or elements to form unique inventive solutions defined by the claims. Any feature or element of any embodiment can also be combined with features or elements from other inventive solutions to form another unique inventive solution defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in the present disclosure can be implemented alone or in any suitable combination. Therefore, the embodiments are not subject to other limitations except those made in accordance with the appended claims and their equivalents. In addition, various modifications and changes can be made within the scope of protection of the appended claims.

[0024] An embodiment of the present disclosure provides a carbon emission calculation method, as Figure 1 shown, which may include the following steps:

[0025] Step S110, calculate the unknown energy emission factor according to the quantity of different types of energy consumed by different types of devices of the target enterprise in a predetermined time period and the known energy emission factors; wherein, the types are obtained by dividing according to the role of the devices in energy conversion;

[0026] Step S120, for each type of device, calculate the carbon emission of the device consuming the current energy in the predetermined time period respectively according to the quantity of the current energy consumed by the device of this type in the predetermined time period and the emission factor of the current energy.

[0027] The carbon emission calculation method of this embodiment divides the devices of the target enterprise into different types according to the role of the devices in energy conversion, and calculates the unknown energy emission factors based on the quantities of different types of energy consumed by different types of devices of the target enterprise in a predetermined time period and the known energy emission factors, and finally obtains the emission factors of all types of energy of the enterprise, so as to further obtain the carbon emissions generated by different types of devices consuming different types of energy. The carbon emission calculation method of this embodiment makes the granularity of carbon emission accounting of the enterprise refined to the device level, realizing the refined measurement of the carbon emissions of the target enterprise.

[0028] In an exemplary embodiment of the present disclosure, after obtaining the emission factors of each type of energy, a carbon emission factor library of the enterprise can be established based on the emission factors of different energies to view the emission situations of different energies of the enterprise, compare the clean and green degrees of energy use of different energies of the enterprise, and further optimize the cleanliness of energy use of different energies.

[0029] In an exemplary embodiment of the present disclosure, the different types of devices include energy conversion devices, and the energy conversion devices include N-level energy conversion devices, and each level of energy conversion device is used for performing energy conversion of the corresponding level; where N is a positive integer, it should be noted that the present disclosure does not limit the size of N, and N can be set according to the energy conversion involved in the target enterprise;

[0030] The calculation of the unknown energy emission factors based on the quantities of different types of energy consumed by different types of devices of the target enterprise in a predetermined time period and the known energy emission factors includes:

[0031] For each level of energy conversion device, calculate the unknown energy emission factors involved in the energy conversion process of this level of energy conversion device based on the quantities of different types of energy involved in the energy conversion of this level of energy conversion device of the target enterprise in a predetermined time period and the known energy emission factors;

[0032] It should be noted that when there are multiple levels, the energy emission factors calculated by the previous level of energy conversion device can be used as the known energy emission factors in the subsequent level of energy conversion device; for example, the energy emission factors calculated by the first-level energy conversion device can be used as the known energy emission factors in the energy conversion process of the second-level energy conversion device, and can also be used as the known energy emission factors in the energy conversion process of the third-level energy conversion device; another example is that the energy emission factors calculated by the second-level energy conversion device can be used as the known energy emission factors in the energy conversion process of the third-level energy conversion device.

[0033] The carbon emission calculation method of this embodiment is based on the principle of "whoever uses it shares it". Based on the energy conversion logic, the emission factors of energy are calculated, so as to allocate the carbon emissions generated by internal energy medium generating devices (i.e., energy conversion devices) such as thermal power plants and water plants to each production device according to the actual usage. By balancing data, analyzing energy consumption and considering conversion efficiency for different levels of energy conversion, the emission factors of different energies and the carbon emissions of different types of devices consuming different energies can be calculated, so as to break down the carbon emissions at the whole plant level into the device level. Furthermore, it can help enterprises optimize the energy consumption structure, reduce the energy consumption of devices, introduce green clean energy, and reduce the carbon emissions of devices. The carbon emission calculation method of this disclosure is especially applicable to enterprises with complex energy conversion such as thermal power plants, helping enterprises calculate the emission factors of different indirect energy media within the enterprise, and then realizing the refined accounting of carbon emissions.

[0034] To better understand the solution of this embodiment, an example is given when N = 1. In an exemplary embodiment of the present disclosure, when N = 1, the target enterprise consumes the first initial energy and generates the first target energy and the second target energy. At this time, given the quantity of the first initial energy, the emission factor of the first initial energy, the quantity of the first target energy, the emission factor of the first target energy, and the quantity of the second target energy, the emission factor of the second target energy can be calculated by the following formula: = (quantity of the first initial energy * emission factor of the first initial energy - quantity of the first target energy * emission factor of the first target energy) / quantity of the second target energy.

[0035] In another exemplary embodiment of the present disclosure, when N is equal to 2, the energy includes direct energy and indirect energy, and the indirect energy includes: electricity, steam, water, nitrogen, and wind; the known energy emission factors include: direct energy emission factor, electricity emission factor, nitrogen emission factor, and water emission factor;

[0036] Calculating the unknown energy emission factor involved in the energy conversion process of the energy conversion device at this level according to the quantity of different types of energy involved in the corresponding level of energy conversion by the energy conversion device at this level in the target enterprise during a predetermined period and the known energy emission factors includes:

[0037] According to the quantity of electricity and steam generated by the primary energy conversion device in the target enterprise for primary energy conversion of direct energy during a predetermined period, the carbon emissions generated, the quantity of electricity of the externally supplied energy, the direct energy emission factor, and the electricity emission factor, calculate the steam emission factor; wherein, the direct energy can be bituminous coal.

[0038] Calculate the wind emission factor based on the quantities of water, nitrogen, and wind generated by the secondary energy conversion device in the target enterprise through secondary energy conversion of electricity and steam during a predetermined time period, the resulting carbon emissions, as well as the nitrogen emission factor and water emission factor.

[0039] Among them, the direct energy can be bituminous coal, the direct energy emission factor can be the bituminous coal emission factor, and the bituminous coal emission factor, electricity emission factor, nitrogen emission factor, and water emission factor can be obtained from literature materials or set based on empirical values.

[0040] It should be noted that in this embodiment, the indirect energies of electricity, steam, water, nitrogen, and wind are set to better understand the carbon emission calculation method of the present disclosure. The present disclosure does not limit the types of direct energy and indirect energy, and the types of direct energy and indirect energy can be set according to the actual situation of the target enterprise. The core of the carbon emission calculation method of the present disclosure is based on the logic of energy conversion. By using the known emission factors of direct energy and indirect energy, the unknown energy emission factor can be calculated, which can then help the enterprise calculate the carbon emissions at the device level.

[0041] Based on the energy consumption logic of the device, in the primary energy conversion and secondary energy conversion modes, combined with the energy statistical data of the target enterprise, the emission factor of each type of energy involved in the target enterprise can finally be obtained, and then the refined measurement of the carbon emissions of different types of devices can be achieved.

[0042] In an exemplary embodiment of the present disclosure, the different types of devices further include production devices and auxiliary facilities; calculating the steam emission factor according to the quantities of electricity and steam generated by the primary energy conversion device through primary energy conversion in the target enterprise during a predetermined time period, the resulting carbon emissions, as well as the quantity of electricity of the externally supplied energy, the direct energy emission factor, and the electricity emission factor may include:

[0043] Calculate the quantity of electricity generated by primary energy conversion according to the quantity of electricity consumed by the secondary energy conversion device, the quantity of electricity consumed by the production device, and the quantity of electricity consumed by the auxiliary facilities; the calculation formula can be:

[0044] Quantity of electricity generated by primary energy conversion = Quantity of electricity consumed by secondary energy conversion device + Quantity of electricity consumed by production device + Quantity of electricity consumed by auxiliary facilities;

[0045] Calculate the quantity of steam generated by primary energy conversion according to the quantity of steam consumed by the secondary energy conversion device, the quantity of steam consumed by the production device, and the quantity of steam consumed by the auxiliary facilities; the calculation formula can be:

[0046] The quantity of steam generated by primary energy conversion = the quantity of steam consumed by secondary energy conversion devices + the quantity of steam consumed by production devices + the quantity of steam consumed by auxiliary facilities;

[0047] Based on the quantity of direct energy consumed by the primary energy conversion device and the direct energy emission factor, calculate the carbon emissions of the primary energy conversion device; the calculation formula can be:

[0048] The carbon emissions of the primary energy conversion device = the quantity of direct energy consumed by the primary energy conversion device * the direct energy emission factor;

[0049] Based on the quantity of electricity of the externally supplied energy and the electricity emission factor, calculate the carbon emissions of the externally supplied energy; the calculation formula can be:

[0050] The carbon emissions of the externally supplied energy = the quantity of electricity of the externally supplied energy * the electricity emission factor;

[0051] Based on the quantity of electricity generated by the primary energy conversion, the quantity of steam generated by the primary energy conversion, the carbon emissions of the primary energy conversion device, the carbon emissions of the externally supplied energy, and the electricity emission factor, calculate the steam emission factor; the calculation formula can be:

[0052] The steam emission factor = (the carbon emissions of the primary energy conversion device - the carbon emissions of the externally supplied energy - the quantity of electricity generated by the primary energy conversion * the electricity emission factor) / the quantity of steam generated by the primary energy conversion.

[0053] In an exemplary embodiment of the present disclosure, for the secondary energy conversion device, the calculation of the carbon emissions of the device consuming the current energy in the predetermined time period based on the consumption quantity of the current energy by the device of this type and the emission factor of the current energy may include:

[0054] Based on the quantity of electricity consumed by the secondary energy conversion device and the electricity emission factor, calculate the carbon emissions of the secondary energy conversion device consuming electricity;

[0055] Based on the quantity of steam consumed by the secondary energy conversion device and the steam emission factor, calculate the carbon emissions of the secondary energy conversion device consuming steam.

[0056] In an exemplary embodiment of the present disclosure, the calculation of the wind emission factor based on the carbon emissions generated by the secondary energy conversion device of the target enterprise consuming electricity and steam to generate water, nitrogen, and wind in a predetermined time period, and the nitrogen emission factor and water emission factor may include:

[0057] Calculate the carbon emissions of the secondary energy conversion device based on the carbon emissions of the electricity consumed by the secondary energy conversion device and the carbon emissions of the steam consumed by the secondary energy conversion device. It should be noted that the carbon emissions of the secondary energy conversion device are the carbon emissions generated by the secondary energy conversion device consuming electricity and steam.

[0058] Calculate the amount of water generated by secondary energy conversion based on the amount of water consumed by the production device and the amount of water consumed by the auxiliary facilities. The calculation formula can be:

[0059] The amount of water generated by secondary energy conversion = the amount of water consumed by the production device + the amount of water consumed by the auxiliary facilities;

[0060] Calculate the amount of nitrogen generated by secondary energy conversion based on the amount of nitrogen consumed by the production device and the amount of nitrogen consumed by the auxiliary facilities. The calculation formula can be:

[0061] The amount of nitrogen generated by secondary energy conversion = the amount of nitrogen consumed by the production device + the amount of nitrogen consumed by the auxiliary facilities;

[0062] Calculate the amount of wind generated by secondary energy conversion based on the amount of wind consumed by the production device and the amount of wind consumed by the auxiliary facilities. The calculation formula can be:

[0063] The amount of wind generated by secondary energy conversion = the amount of wind consumed by the production device + the amount of wind consumed by the auxiliary facilities;

[0064] Calculate the wind emission factor based on the carbon emissions of the secondary energy conversion device, the amount of water generated by secondary energy conversion, the amount of nitrogen generated by secondary energy conversion, the amount of wind generated by secondary energy conversion, the nitrogen emission factor, and the water emission factor. The calculation formula can be:

[0065] Wind emission factor = (Carbon emissions of the secondary energy conversion device - Nitrogen emission factor * Amount of nitrogen generated by secondary energy conversion - Water emission factor * Amount of water generated by secondary energy conversion) / Amount of wind generated by secondary energy conversion;

[0066] Among them, the nitrogen emission factor and the water emission factor can be obtained through literature materials or empirical values.

[0067] Based on the logic of energy conversion, this embodiment can ultimately obtain the emission factor of wind by means of the nitrogen emission factor and the water emission factor, and based on the relationship between the carbon emissions of secondary energy conversion and the carbon emissions of the generated water, nitrogen, and wind, thereby achieving the acquisition of the emission factors of each type of energy. The method for obtaining the energy emission factors in this embodiment can ensure that the sum of the carbon emissions of different types of devices calculated based on the emission factors of each type of energy obtained in this embodiment is consistent with the sum of the carbon emissions at the plant boundary, that is, it can ensure that the sum of the carbon emissions of all types of devices measured at the device boundary is consistent with the sum of the carbon emissions at the plant boundary.

[0068] In an exemplary embodiment of the present disclosure, for the production device, calculating the carbon emissions of the device consuming the current energy during the predetermined period according to the consumption quantity of the device of this type for the current energy and the emission factor of the current energy during the predetermined period may further include:

[0069] Calculating the carbon emissions of the production device consuming electricity according to the electricity consumption quantity of the production device and the electricity emission factor;

[0070] Calculating the carbon emissions of the production device consuming steam according to the steam consumption quantity of the production device and the steam emission factor;

[0071] Calculating the carbon emissions of the production device consuming water according to the water consumption quantity of the production device and the water emission factor;

[0072] Calculating the carbon emissions of the production device consuming nitrogen according to the nitrogen consumption quantity of the production device and the nitrogen emission factor;

[0073] Calculating the carbon emissions of the production device consuming wind according to the wind consumption quantity of the production device and the wind emission factor.

[0074] In an exemplary embodiment of the present disclosure, for the auxiliary facilities, calculating the carbon emissions of the device of this type consuming the current energy during the predetermined period according to the consumption quantity of the device of this type for the current energy and the emission factor of the current energy during the predetermined period may further include:

[0075] Calculating the carbon emissions of the auxiliary facilities consuming electricity according to the electricity consumption quantity of the auxiliary facilities and the electricity emission factor;

[0076] Calculating the carbon emissions of the auxiliary facilities consuming steam according to the steam consumption quantity of the auxiliary facilities and the steam emission factor;

[0077] Calculating the carbon emissions of the auxiliary facilities consuming water according to the water consumption quantity of the auxiliary facilities and the water emission factor;

[0078] Calculate the carbon emissions of nitrogen consumed by the auxiliary facilities based on the amount of nitrogen consumed by the auxiliary facilities and the nitrogen emission factor.

[0079] Calculate the carbon emissions of wind consumed by the auxiliary facilities based on the amount of wind consumed by the auxiliary facilities and the wind emission factor.

[0080] The carbon emission calculation method of the present disclosure can classify the devices of the target enterprise and combine the energy conversion logic to obtain the emission factors of indirect energy such as electricity, steam, nitrogen, water, and wind involved in the target enterprise. Furthermore, the carbon emissions of different types of devices can be obtained, realizing the refined measurement of the carbon emissions of different types of devices of the target enterprise. On this basis, according to the principle of "who uses it, who shares it", the energy utilization efficiency of different energies of different types of devices can be determined. Due to self-owned power plants, heating devices, etc., there are still differences in the energy utilization levels of different enterprises. By calculating the carbon emission factors of different energies, it helps enterprises establish a carbon emission factor library, view the emission situations of different energies of the enterprises, and compare the energy utilization cleanliness and greenness of different energies of the enterprises. Furthermore, it can help enterprises optimize the energy utilization structure, reduce the energy consumption of the devices, introduce green and clean energy, and reduce the carbon emissions of the devices.

[0081] Taking a certain refinery as an example of the target enterprise, the carbon emission calculation method of the present disclosure will be described in detail below.

[0082] First, a brief introduction to the devices and energy conversion process of the refinery will be given.

[0083] As Figure 2 shown, the refinery includes various types of devices, such as: energy conversion devices, production devices, and auxiliary facilities; different types can be obtained by dividing according to the role of the devices in energy conversion.

[0084] Among them, the energy conversion devices can include primary energy conversion devices and secondary energy conversion devices. The primary energy conversion devices can include thermal power plants, and the secondary energy conversion devices can include boilers, air separation devices, and circulating water devices, etc.; the production devices can include the first production device, the second production device,..., the nth production device (n is the number of production devices). Exemplarily, the production devices can include atmospheric and vacuum distillation units, fluid catalytic cracking units, hydrocracking units, and catalytic reforming units, etc.; the auxiliary facilities can include storage and transportation devices, sewage treatment devices, etc.

[0085] The production devices need to determine the activity levels of different types of carbon emission sources; the energy conversion devices are the devices for generating energy media, mainly used for calculating indirect energy emission factors; the carbon emissions will ultimately be decomposed into production devices and auxiliary facilities; the auxiliary facilities serve the production devices and do not participate in energy conversion.

[0086] The thermal power plant is the source of electricity and steam for the whole plant. Exemplarily, bituminous coal combustion in the thermal power plant generates electricity and steam, and then the generated electricity and steam are supplied to the air separation unit, circulating water unit, production unit and auxiliary facilities. In this process, primary energy conversion and secondary energy conversion are involved: the primary energy conversion is the conversion of bituminous coal combustion in the thermal power plant into electricity and steam; the secondary energy conversion is that the air separation unit, circulating water unit, etc. consume electricity and steam to produce nitrogen, water and wind. Through the primary energy conversion and secondary energy conversion, the enterprise's refinery apportions the carbon emissions of the energy conversion device to the production unit and auxiliary facilities.

[0087] As Figure 3 shown, the process of calculating the carbon emissions of the devices in the refinery can be as follows:

[0088] Step S310: Count the quantity of bituminous coal consumed by the primary energy conversion device of the target refinery, the quantity of electricity of the externally supplied energy, and the quantities of electricity and steam consumed by the production unit, secondary energy conversion device and auxiliary facilities.

[0089] Table 1 shows the primary energy conversion data. As shown in Table 1, the quantity of bituminous coal consumed by the primary energy conversion device (i.e., the thermal power plant in the target refinery) is 3.468 million tons; the quantity of electricity of the externally supplied energy is 0.7167 million tons; the production unit consumes 100 MWH of electricity and 4 million tons of steam; the secondary energy conversion device consumes 37 MWH of electricity and 2.07 million tons of steam; the auxiliary facilities consume 10 MWH of electricity and 0.8 million tons of steam. From the data in Table 1, it can be calculated that the total quantity of electricity consumed by the production unit, secondary energy conversion device and auxiliary facilities is 147 MWH, and the total quantity of steam consumed is 6.87 million tons.

[0090] Table 1 Primary Energy Conversion Data Table

[0091]

[0092] Step S320: Determine the steam emission factor according to the carbon emissions involved in the primary energy conversion process of the target refinery. This step may include:

[0093] Step S321: Calculate the carbon emissions of the primary energy conversion device according to the quantity of bituminous coal consumed by the primary energy conversion device and the bituminous coal emission factor. As shown in Table 1, the quantity of bituminous coal consumed by the statistically primary energy conversion device is 3.468 million tons, and the bituminous coal emission factor can be set to 1.7849 by referring to literature materials or based on experience. Then, the carbon emissions of the primary energy conversion device can be calculated as 3.4680 * 1.7849 = 619.

[0094] Step S322: Calculate the carbon emissions of the externally supplied energy based on the electricity quantity of the externally supplied energy and the electricity emission factor. As shown in Table 1, the statistically recorded electricity quantity of the externally supplied energy is 71.67 MWH, and the electricity emission factor can be set to 1.2 by referring to literature or based on experience (for example, according to...), then the carbon emissions of the externally supplied energy can be calculated as 71.67 * 1.2 = 86.

[0095] Step S323: Calculate the steam emission factor based on the carbon emissions of the primary energy conversion device, the carbon emissions of the externally supplied energy, the electricity emission factor, the total electricity quantity consumed by all devices of the target enterprise, and the total steam quantity consumed by all devices of the target enterprise. The calculation formula can be:

[0096] Steam emission factor = (Carbon emissions of the primary energy conversion device - Carbon emissions of the externally supplied energy - Total electricity quantity consumed by all devices of the target enterprise * Electricity emission factor) / Total steam quantity consumed by all devices of the target enterprise;

[0097] Among them, the total electricity quantity consumed by all devices of the target enterprise is the electricity quantity generated by the primary energy conversion, which is equal to the total electricity quantity consumed by the secondary energy conversion device, the production device, and the auxiliary facilities; the total steam quantity consumed by all devices of the target enterprise is the steam quantity generated by the primary energy conversion, which is equal to the total steam quantity consumed by the secondary energy conversion device, the production device, and the auxiliary facilities.

[0098] Among them, the carbon emissions of the primary energy conversion device are 6.19 million tons, the carbon emissions of the externally supplied energy are 0.86 million tons, the electricity emission factor is 1.2, the total electricity quantity is 147 MWH, and the total steam quantity is 6.87 million tons. Then the steam emission factor is (619 - 86 - 147 * 1.2) / 687 = 0.52.

[0099] Step S330: Calculate the carbon emissions generated by the secondary energy conversion device, the production device, and the auxiliary facilities consuming electricity and steam respectively; among them, the carbon emissions generated by the secondary energy conversion device consuming electricity and steam are the carbon emissions of the secondary energy conversion device.

[0100] Step S331: Calculate the carbon emissions of the secondary energy conversion device based on the electricity quantity consumed by the secondary energy conversion device, the steam quantity consumed by the secondary energy conversion device, the electricity emission factor, and the steam emission factor. As shown in Table 1, the electricity quantity consumed by the secondary energy conversion device is 37 MWH, the steam quantity consumed by the secondary energy conversion device is 2.07 million tons, the electricity emission factor is 1.2, and the steam emission factor is 0.52. Then the carbon emissions of the secondary energy conversion device are 37 * 1.2 + 2.07 * 0.52 = 152.

[0101] Step S332: Calculate the carbon emissions of the production device based on the amount of electricity consumed by the production device, the amount of steam consumed by the production device, the electricity emission factor, and the steam emission factor. As shown in Table 1, the amount of electricity consumed by the production device is 100 MWH, the amount of steam consumed by the production device is 4 million tons, the electricity emission factor is 1.2, and the steam emission factor is 0.52. Then the carbon emissions generated by the production device consuming electricity and steam are 100 * 1.2 + 400 * 0.52 = 328.

[0102] Step S333: Calculate the carbon emissions of the auxiliary facilities based on the amount of electricity consumed by the auxiliary facilities, the amount of steam consumed by the auxiliary facilities, the electricity emission factor, and the steam emission factor. As shown in Table 1, the amount of electricity consumed by the auxiliary facilities is 10 MWH, the amount of steam consumed by the auxiliary facilities is 0.8 million tons, the electricity emission factor is 1.2, and the steam emission factor is 0.52. Then the carbon emissions generated by the auxiliary facilities consuming electricity and steam are 10 * 1.2 + 80 * 0.52 = 53.6.

[0103] Step S340: Calculate the wind emission factor based on the carbon emissions of the secondary energy conversion device, the amount of water generated by the secondary energy conversion, the amount of nitrogen generated by the secondary energy conversion, the amount of wind generated by the secondary energy conversion, the nitrogen emission factor, and the water emission factor. The calculation formula can be:

[0104] Wind emission factor = (Carbon emissions of the secondary energy conversion device - Nitrogen emission factor * Amount of nitrogen generated by the secondary energy conversion - Water emission factor * Amount of water generated by the secondary energy conversion) / Amount of wind generated by the secondary energy conversion;

[0105] Among them, the amount of water generated by the secondary energy conversion is the total amount of water generated by the secondary energy conversion device consuming electricity and steam (which is also the total amount of water consumed by the production device and the auxiliary facilities in this embodiment), the amount of nitrogen generated by the secondary energy conversion is the total amount of nitrogen generated by the secondary energy conversion device consuming electricity and steam (which is also the total amount of nitrogen consumed by the production device and the auxiliary facilities in this embodiment), and the amount of wind generated by the secondary energy conversion is the total amount of wind generated by the secondary energy conversion device consuming electricity and steam (which is also the total amount of wind consumed by the production device and the auxiliary facilities in this embodiment).

[0106] Table 2 shows the secondary energy conversion data. As shown in Table 2, the production device consumes 1.5 million tons of water, 25,500 cubic meters of nitrogen, and 34,000 cubic meters of wind; the auxiliary facilities consume 0.3 million tons of water, 4,500 cubic meters of nitrogen, and 6,000 cubic meters of wind. It can be known that the amount of water generated by the secondary energy conversion is 1.8 million tons, the amount of nitrogen generated by the secondary energy conversion is 30,000 cubic meters, and the amount of wind generated by the secondary energy conversion is 40,000 cubic meters.

[0107] In addition, the nitrogen emission factor and water emission factor can be obtained from literature or empirical values. The water emission factor found is 0.000617, and the nitrogen emission factor is 0.0012. The carbon emissions of the secondary energy conversion device are 1.5204 million tons.

[0108] Then the wind emission factor is: (152 - 180000 * 0.000617 - 30000 * 0.0012) / 40000 = 0.00012.

[0109] Table 2 Secondary Energy Conversion Data Table

[0110]

[0111] Step S350: Calculate the carbon emissions of electricity, steam, water, nitrogen, and wind for the production device, as shown in Table 3. The calculation process for this step can be as follows:

[0112] Calculate the carbon emissions of the electricity consumed by the production device based on the electricity quantity consumed by the production device and the electricity emission factor. The specific calculation is as follows: 100 * 1.2 = 120;

[0113] Calculate the carbon emissions of the steam consumed by the production device based on the steam quantity consumed by the production device and the steam emission factor. The specific calculation is as follows: 400 * 0.52 = 208;

[0114] Calculate the carbon emissions of the water consumed by the production device based on the water quantity consumed by the production device and the water emission factor. The specific calculation is as follows: 150000 * 0.000617 = 92.55;

[0115] Calculate the carbon emissions of the nitrogen consumed by the production device based on the nitrogen quantity consumed by the production device and the nitrogen emission factor. The specific calculation is as follows: 25500 * 0.0012 = 31;

[0116] Calculate the carbon emissions of the wind consumed by the production device based on the wind quantity consumed by the production device and the wind emission factor: 34000 * 0.00012 = 4.

[0117] Step S360: Calculate the carbon emissions of electricity, steam, water, nitrogen, and wind for the auxiliary facilities, as shown in Table 3. The calculation process for this step can be as follows:

[0118] Calculate the carbon emissions of the electricity consumed by the auxiliary facilities based on the electricity quantity consumed by the auxiliary facilities and the electricity emission factor. The specific calculation is as follows: 10 * 1.2 = 12;

[0119] Calculate the carbon emissions of the auxiliary facilities consumed steam according to the amount of steam consumed by the auxiliary facilities and the steam emission factor. The specific calculation is as follows: 80 * 0.52 = 41.6;

[0120] Calculate the carbon emissions of the auxiliary facilities consumed water according to the amount of water consumed by the auxiliary facilities and the water emission factor. The specific calculation is as follows: 30000 * 0.000617 = 18.51;

[0121] Calculate the carbon emissions of the auxiliary facilities consumed nitrogen according to the amount of nitrogen consumed by the auxiliary facilities and the nitrogen emission factor. The specific calculation is as follows: 4500 * 0.0012 = 5.4;

[0122] Calculate the carbon emissions of the auxiliary facilities consumed wind according to the amount of wind consumed by the auxiliary facilities and the wind emission factor: 6000 * 0.00012 = 0.72.

[0123] Table 3 Carbon Emission Statistics Table of Production Units and Auxiliary Facilities

[0124]

[0125]

[0126] The method for calculating the carbon emissions of the device in the present disclosure is for refining enterprises with self-owned power plants. Based on the energy emission factors and the carbon activity data of different energies of different devices, the whole plant devices are classified into three categories, and the energy conversion logic of the devices is sorted out. Calculate the emission factors of indirect energies such as electricity, steam, nitrogen, water and wind. According to the total carbon emission accounting of the whole plant boundary, calculate the carbon emissions of the device boundary. According to the principle of "whoever uses it shares it", determine the energy use efficiency of different energies. Different enterprises still have differences in energy use levels due to self-owned power plants, heating devices, etc. By calculating the carbon emission factors of different energies of different devices, an enterprise carbon emission factor library is established, and the emission situation of different energies of the enterprise can be viewed, and the energy use cleanliness and greenness of different energies of the enterprise can be compared.

[0127] In an example of this embodiment, the carbon emission calculation method of this embodiment further includes verifying the device carbon emission calculation method, such as Figure 4 shown, may include the following steps:

[0128] Step S410: Calculate the total carbon emissions of the whole plant with the whole plant as the boundary. The calculation formula can be: Total carbon emissions of the whole plant (with the whole plant as the boundary) = Total carbon emissions from fuel combustion of the whole plant - Carbon emissions of externally supplied energy + Carbon emissions of petrochemical business - CO 2 Recovery amount.

[0129] As shown in Table 4, the carbon emissions from fuel combustion in the whole plant are 8.21 million tons, including 2.02 million tons of carbon emissions from fuel combustion in production units (which can be calculated based on the fuel consumption of the units according to the greenhouse gas accounting guidelines), and 6.19 million tons of carbon emissions from bituminous coal combustion in the auxiliary facility thermal power plant; the carbon emissions from externally supplied energy are 0.86 million tons, and the carbon emissions from the petrochemical business of all chemical units add up to 0.44 million tons, and the CO 2 recovery and utilization volume is 10,000 tons. Then, the total carbon emissions of the whole plant (taking the whole plant as the boundary) can be calculated according to the above formula = 8.21 - 0.86 + 0.44 - 0.01 = 7.78 million tons. Among them, the indirect emissions in Table 4 are the carbon emissions from externally supplied energy in Table 1.

[0130] Table 4 Carbon Emission Accounting Table for the Whole Plant Boundary

[0131]

[0132]

[0133] Step S420: Calculate the total carbon emissions of the whole plant with the unit as the boundary. The calculation formula can be: total carbon emissions of the whole plant (with the unit as the boundary) = total carbon emissions from the consumption of electricity, steam, water, nitrogen, and air in production units and auxiliary facilities + carbon emissions from fuel combustion in production units + carbon emissions from the petrochemical business - CO 2 recovery and utilization volume.

[0134] As shown in Table 3, the total carbon emissions from the consumption of electricity, steam, water, nitrogen, and air in production units and auxiliary facilities are 5.33 million tons. When calculating the carbon emissions of the target refinery with the whole plant as the boundary, the calculated carbon emissions from fuel combustion in production units are 2.02 million tons, and the carbon emissions from the petrochemical business are 0.44 million tons, and the CO 2 recovery and utilization volume is 10,000 tons. Then, the total carbon emissions of the whole plant (with the unit as the boundary) can be calculated = 5.33 + 2.02 + 0.44 - 0.01 = 7.78 million tons.

[0135] Step S430: Compare the total carbon emissions of the whole plant calculated with the unit as the boundary and the total carbon emissions of the whole plant calculated with the whole plant as the boundary to verify whether they are equal.

[0136] It can be seen from this embodiment that for a refining and chemical enterprise with a self-owned power plant, the sum of the carbon emissions of all units measured with the unit boundary is consistent with the total carbon emissions of the whole plant boundary, which indicates that the carbon emissions of the refinery unit boundary calculated by the carbon emission calculation method of the present disclosure are accurate. The carbon emission calculation method of the present disclosure can accurately calculate the carbon emissions of the unit boundary, refine the granularity of carbon emission calculation, and then, according to the size of the carbon emissions of different types of units, analyze the energy use clean and green degree of different types of units, and then make targeted improvements.

[0137] One embodiment of the present disclosure further provides a carbon emission calculation device. Refer to Figure 5 , including: a memory and a processor;

[0138] The memory is used to store a program for carbon emission calculation;

[0139] The processor is used to read the program for carbon emission calculation and execute the carbon emission calculation method as described in any embodiment of the present disclosure.

[0140] The carbon emission calculation device of this embodiment, based on energy statistical data and plant-wide carbon emission accounting data, through the calculation of carbon emission factors based on energy conversion logic, conducts refined accounting of device-level carbon emissions, can allocate the plant-wide carbon emissions in detail to specific devices, determine the carbon emissions and emission intensity of each device, and conduct refined accounting of refinery carbon emissions.

[0141] The processor in the above embodiment of the present disclosure may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP for short), a microprocessor, etc., or other conventional processors; the processor may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), discrete logic or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or other equivalent integrated or discrete logic circuits, or a combination of the above devices. That is, the processor in the above embodiment may be any processor device or device combination that implements the various methods, steps, and logic block diagrams disclosed in the embodiments of the present disclosure. If part of the embodiments of the present disclosure are implemented in software, then the instructions for the software can be stored in a suitable non-volatile computer-readable storage medium, and one or more processors can execute the instructions in hardware to implement the methods of the embodiments of the present disclosure. The term "processor" used herein may refer to the above structure or any other structure suitable for implementing the technologies described herein.

[0142] One embodiment of the present disclosure further provides a non-transitory computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, can implement the carbon emission calculation method as described in any embodiment of the present disclosure.

[0143] In one or more of the above exemplary embodiments, the described functionality may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functionality may be stored on or transmitted via a computer-readable medium as one or more instructions or code and executed by a hardware-based processing unit. The computer-readable medium may include a computer-readable storage medium corresponding to a tangible medium such as a data storage medium, or a communication medium including any medium that facilitates transfer of a computer program, such as according to a communication protocol, from one place to another. In this way, the computer-readable medium generally may correspond to a non-transitory tangible computer-readable storage medium or a communication medium such as a signal or a carrier wave. The data storage medium may be any available medium that can be accessed by one or more computers or one or more processors to retrieve instructions, code, and / or data structures for implementing the techniques described in this disclosure. A computer program product may include a computer-readable medium.

[0144] By way of example, and not limitation, such computer-readable storage media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, flash memory, or any other medium that can be used to store the desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection may be termed a computer-readable medium. By way of example, if instructions are transmitted using coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave from a website, server, or other remote source, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of the medium. However, it should be understood that the computer-readable storage medium and the data storage medium do not include connections, carrier waves, signals, or other transient media, but rather are directed to non-transitory tangible storage media. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, or Blu-ray disc, etc., where disks typically reproduce data magnetically, while discs use lasers to reproduce data optically. Combinations of the above should also be included within the scope of computer-readable media.

Claims

1. A carbon emission calculation method, characterized in that: include: Calculate unknown energy emission factors based on the amount of different types of energy consumed by different types of equipment of the target enterprise in a predetermined time period and known energy emission factors; wherein the types are divided according to the role of the equipment in energy conversion; For each type of device, the carbon emissions of the current energy consumed by the device of this type in the predetermined time period are calculated according to the current energy consumption amount and the emission factor of the current energy of the device of this type in the predetermined time period.

2. The method according to claim 1, characterized in that: The different types of devices include energy conversion devices, and the energy conversion devices include N levels of energy conversion devices, and each level of energy conversion device is used to perform energy conversion of a corresponding level; The calculation of unknown energy emission factors according to the amount of different types of energy consumed by different types of equipment of the target enterprise in a predetermined time period and known energy emission factors includes: For each level of energy conversion device, the unknown energy emission factors involved in the energy conversion process of the energy conversion device at this level are calculated based on the quantity of different types of energy involved in the corresponding level of energy conversion performed by the energy conversion device at this level in the target enterprise within a predetermined time period and the known energy emission factors.

3. The method according to claim 2, characterized in that: When N is equal to 2, the energy includes direct energy and indirect energy, and the indirect energy includes: electricity, steam, water, nitrogen and wind; the known energy emission factors include: direct energy emission factor, electricity emission factor, nitrogen emission factor and water emission factor; The calculation of the unknown energy emission factors involved in the energy conversion process of the energy conversion device at this level in the target enterprise according to the quantity of different types of energy involved in the energy conversion of the corresponding level in the predetermined time period and the known energy emission factors includes: Calculate the steam emission factor based on the amount of electricity and steam generated by the primary energy conversion of direct energy by the primary energy conversion device in the target enterprise during a predetermined time period, the carbon emissions generated, the amount of electricity from external energy, the direct energy emission factor and the electricity emission factor; The wind emission factor is calculated based on the amount of water, nitrogen and wind generated by the secondary energy conversion device in the target enterprise for secondary energy conversion of electricity and steam in a predetermined time period, the carbon emissions generated, and the nitrogen emission factor and water emission factor.

4. The method according to claim 3, characterized in that: The different types of devices also include: production devices and auxiliary facilities; the steam emission factor is calculated based on the amount of electricity and steam generated by the primary energy conversion device of the target enterprise through primary energy conversion in a predetermined time period, the carbon emissions generated, the amount of electricity from external energy, the direct energy emission factor and the electricity emission factor, including: Calculate the amount of electricity generated by the primary energy conversion based on the amount of electricity consumed by the secondary energy conversion device, the amount of electricity consumed by the production device, and the amount of electricity consumed by the auxiliary facilities; Calculate the amount of steam generated by the primary energy conversion based on the amount of steam consumed by the secondary energy conversion device, the amount of steam consumed by the production device, and the amount of steam consumed by the auxiliary facilities; Calculate the carbon emissions of the primary source conversion device based on the amount of direct energy consumed by the primary source conversion device and the direct energy emission factor; Calculate the carbon emissions of the external energy supply based on the amount of electricity from the external energy supply and the electricity emission factor; The steam emission factor is calculated based on the amount of electricity generated by the primary energy conversion, the amount of steam generated by the primary energy conversion, the carbon emissions of the primary energy conversion device, the carbon emissions of the external energy supply and the electricity emission factor.

5. The method according to claim 4, characterized in that: For the secondary energy conversion device, the calculation of the carbon emissions of the current energy consumed by the device of this type in the predetermined time period according to the amount of current energy consumed by the device of this type in the predetermined time period and the emission factor of the current energy includes: Calculating the carbon emissions of the electricity consumed by the secondary energy conversion device according to the amount of electricity consumed by the secondary energy conversion device and the electricity emission factor; The carbon emission of the steam consumed by the secondary energy conversion device is calculated based on the amount of steam consumed by the secondary energy conversion device and the steam emission factor.

6. The method according to claim 5, characterized in that: The wind emission factor is calculated based on the carbon emissions generated by the secondary energy conversion of electricity and steam consumed by the secondary energy conversion device of the target enterprise during the predetermined time period, the amount of water, nitrogen and wind generated, and the nitrogen emission factor and water emission factor, including: Calculating the carbon emissions of the secondary energy conversion device according to the carbon emissions of electricity consumed by the secondary energy conversion device and the carbon emissions of steam consumed by the secondary energy conversion device; Calculate the amount of water generated by secondary energy conversion based on the amount of water consumed by the production device and the amount of water consumed by the auxiliary facilities; Calculate the amount of nitrogen generated by secondary energy conversion based on the amount of nitrogen consumed by the production device and the amount of nitrogen consumed by the auxiliary facilities; Calculate the amount of wind generated by secondary energy conversion based on the amount of wind consumed by the production device and the amount of wind consumed by the auxiliary facilities; The wind emission factor is calculated based on the carbon emissions of the secondary energy conversion device, the amount of water generated by the secondary energy conversion, the amount of nitrogen generated by the secondary energy conversion, the amount of wind generated by the secondary energy conversion, the nitrogen emission factor and the water emission factor.

7. The method according to claim 6, characterized in that: For the production device, the calculating, according to the amount of current energy consumed by the device of this type in the predetermined time period and the emission factor of the current energy, the carbon emissions of the device of this type in the predetermined time period due to the current energy consumed, includes: Calculating the carbon emissions of the electricity consumed by the production device based on the amount of electricity consumed by the production device and the electricity emission factor; Calculate the carbon emissions of the steam consumed by the production device according to the amount of steam consumed by the production device and the steam emission factor; Calculating the carbon emissions of water consumed by the production device based on the amount of water consumed by the production device and the water emission factor; Calculating the carbon emissions of nitrogen consumed by the production device based on the amount of nitrogen consumed by the production device and the nitrogen emission factor; The carbon emission amount of the wind consumed by the production device is calculated based on the amount of wind consumed by the production device and the wind emission factor.

8. The method according to claim 6, characterized in that: For the auxiliary facility, the step of calculating the carbon emissions of the current energy consumed by the device of the type in the predetermined time period according to the current energy consumption amount and the emission factor of the current energy in the predetermined time period includes: Calculating the carbon emissions of the electricity consumed by the auxiliary facility based on the amount of electricity consumed by the auxiliary facility and the electricity emission factor; Calculating the carbon emissions of the steam consumed by the auxiliary facility based on the amount of steam consumed by the auxiliary facility and the steam emission factor; Calculating the carbon emissions of water consumed by the auxiliary facilities according to the amount of water consumed by the auxiliary facilities and the water emission factor; Calculating the carbon emissions of the nitrogen consumed by the auxiliary facilities according to the amount of nitrogen consumed by the auxiliary facilities and the nitrogen emission factor; The carbon emission amount of the wind consumed by the auxiliary facility is calculated according to the amount of wind consumed by the auxiliary facility and the wind emission factor.

9. A carbon emission calculation device, comprising: A memory and a processor; characterized in that: The memory is used to store a program for carbon emission calculation; The processor is used to read the program for carbon emission calculation and execute the carbon emission calculation method according to any one of claims 1 to 8.

10. A non-transitory computer-readable storage medium storing a computer program, wherein: The computer program, when executed by a processor, can implement the carbon emission calculation method as claimed in any one of claims 1 to 8.

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