A calculation method, device and memory for the carbon emission intensity in the production process of petrochemical products

Abstract

The present invention discloses a calculation method, device and memory for the carbon emission intensity in the production process of petrochemical products. The calculation method includes: S1 obtaining the basic information and data of the petrochemical product production stage, and extracting the energy consumption data involved in the petrochemical product production process; S2 calculating the carbon emission factors of each emission source according to the energy consumption data; S3 determining the proportion coefficient of each unit device; S4 calculating the carbon emission coefficients of each emission source and / or each unit device; S5 calculating the carbon emission intensity of each emission source and / or each unit device in the petrochemical product production stage. The method provided by the present invention can accurately calculate the carbon emission intensity of the emission source and / or the unit device in the petrochemical product production process, and realize the accurate identification of the carbon emission hotspots in the petrochemical product production process. It can effectively provide support for enterprises to accurately implement emission reduction technologies.

Description

Technical Field

[0001] The present invention relates to the technical field of energy conservation and emission reduction metering, and particularly relates to a calculation method, device and memory for the carbon emission intensity in the production process of petrochemical products. Background Art

[0002] The global warming problems such as glacier melting and sea level rise caused by the large emissions of greenhouse gases have attracted great attention from countries around the world. Seeking low-carbon development paths is becoming the main trend of global economic development.

[0003] Chinese Patent Application CN 106339585 A discloses an evaluation method for the carbon emission intensity of coal-fired power generation units. The steps are as follows: According to the total CO 2 emission amount, power supply amount, heat supply amount, standard coal consumption for heat supply and standard coal consumption for power supply of various calibers of a coal-fired power generation unit, the corresponding calculated CO 2 emission intensity for power supply and the calculated CO 2 emission intensity for heat supply are obtained; according to the total raw coal consumption of the unit, the calculated CO 2 emission intensity for power supply and the calculated CO 2 emission intensity for heat supply, the calculated raw coal amount for power supply is obtained; according to the annual average received base low calorific value of the raw coal of the unit and the calculated raw coal amount for power supply, the calculated standard coal amount for power supply is obtained; according to the power supply amount and the calculated standard coal amount for power supply, the verified standard coal consumption for power supply is obtained; the true standard coal consumption for power supply is obtained; the calculated CO 2 emission intensity for power supply and the calculated CO 2 emission intensity for heat supply corresponding to the true standard coal consumption for power supply are the true CO 2 emission intensity for power supply and the true CO 2 emission intensity for heat supply. This method can be used to verify the standard coal consumption for power supply and reduce the calculation deviation.

[0004] However, this method is not applicable to the petrochemical industry. As one of the key industries for greenhouse gas emission control, it is extremely urgent to accelerate the exploration of low-carbon production paths in the petrochemical industry. Currently, major petrochemical companies around the world have gradually promoted the research and development of low-carbon technologies. Among them, the application of carbon footprint technology can quantitatively consider the carbon emissions of the entire life cycle of petrochemical products, which is of great help to enterprises in improving production efficiency and saving production costs. The production process of petrochemical products is complex. If carbon emissions are to be reduced during the production stage, it is necessary to identify the links where emission reduction technologies are implemented and implement precise policies. Currently, for the accounting of the carbon footprint of petrochemical products, calculations are only carried out for emissions, and no specific analysis is conducted on the carbon emission hotspots during the production process. It is impossible to accurately judge the carbon emission intensity of emission sources and unit devices during the production process of a single petrochemical product. Through the calculation of carbon emission intensity, the main emission hotspots during the production process of petrochemical products can be effectively and accurately identified, which will help enterprises grasp the key points of emission reduction and accurately implement emission reduction technologies. Summary of the Invention

[0005] Aiming at the defects in the prior art, the purpose of the present invention is to provide a calculation method for the carbon emission intensity in the production process of petrochemical products, so as to solve the problem that the carbon emission intensity cannot be quantitatively considered in the prior art, and further more accurately identify the emission hotspots of greenhouse gases in the production process of petrochemical products. Another purpose of the present invention is also to provide a calculation device and a memory for the carbon emission intensity in the production process of petrochemical products.

[0006] The present invention provides a calculation method for the carbon emission intensity in the production process of petrochemical products, including the following steps:

[0007] S1 Obtain the basic information and data of the petrochemical product production stage, and extract the energy consumption data involved in the petrochemical product production process;

[0008] S2 Calculate the carbon emission factors of each emission source according to the energy consumption data;

[0009] S3 Determine the proportion coefficient of each unit device according to the basic information and data of the petrochemical product production stage;

[0010] S4 Calculate the carbon emission coefficient of each emission source and / or the carbon emission coefficient of each unit device according to the carbon emission factors of each emission source and the proportion coefficient of each unit device;

[0011] S5 Calculate the carbon emission intensity of each emission source and / or the carbon emission intensity of each unit device in the petrochemical product production stage according to the carbon emission coefficient of each emission source and / or the carbon emission coefficient of each unit device.

[0012] Furthermore, the method for obtaining the basic information and data of the petrochemical product production stage in S1 and extracting the energy consumption data involved in the petrochemical product production process includes:

[0013] S11 Select the petrochemical product to be accounted, and obtain the production process and background data of the petrochemical product;

[0014] S12 Draw a production flow chart of the petrochemical product according to the production process and background data of the petrochemical product;

[0015] S13 According to the production flow chart, clarify the unit devices involved in the petrochemical product production process, and obtain the relevant energy consumption data of the unit devices.

[0016] Furthermore, the petrochemical product is one or more of gasoline, diesel, jet fuel, asphalt, lubricating oil, polyethylene, polypropylene, caprolactam, etc.

[0017] Furthermore, the unit devices include one or more of a crude distillation unit, a fluid catalytic cracking unit, a jet fuel hydrogenation unit, a residue hydrogenation unit, a coking unit, a reforming unit, an S-ZORB unit, and various oil storage tanks, etc.

[0018] Further, the emission sources include one or more of fuel gas, electricity, steam, fresh water, circulating water, demineralized water, deaerated water, nitrogen, compressed air, etc.

[0019] Further, the calculation method of the carbon emission factor of the emission source in S2 includes:

[0020] S21 Classify the emission sources in the energy consumption data into four types according to their energy or material consumption sources: fuel emission sources, electricity emission sources, steam emission sources, and other emission sources;

[0021] S22 According to the classification standard of S21, classify the carbon emission factors into fuel emission factors, electricity emission factors, steam emission factors, and other emission factors, and obtain each emission factor respectively.

[0022] The fuel emission factors in S22 are known fixed values, which are: fuel oil, 3.2366; fuel gas, 2.6528; water coal slurry, 1.78; coke, 2.8655; diesel, 3.288; anthracite, 1.9162, unit: tCO 2 / t.

[0023] The calculation formulas for the electricity emission factor and the steam emission factor in S22 are: E = a × Q.

[0024] In the formula, E is the electricity or steam emission factor, where the electricity emission factor is E e , and the steam emission factor is E s ; a is the calorific value emission factor of electricity or steam, where the electricity calorific value emission factor is a e , and the steam calorific value emission factor is a s ; Q is the calorific value of electricity or steam, where Q is a constant. Q e is the calorific value of electricity, Q e = 3.6 × 1000 MJ / MWh; Q s is the steam calorific value, Q s = 3.684 × 1000 MJ / t.

[0025] The electricity calorific value emission factor a e and the steam calorific value emission factor a s can be calculated through the fuel consumption during the self-generation process, and the calculation formula is as follows:

[0026] ∑q f ×E f = a e ×q e ×Q e +a s ×q s ×Qs

[0027] In the formula, q f is the fuel consumption during the self-generation process; E f is the emission factor of the fuel; a e is the emission factor of the calorific value of electricity; q e is the self-generated electricity; Q e is the calorific value of electricity, Q e = 3.6 × 1000 MJ / MWh; a s is the emission factor of the calorific value of steam; q s is the steam quantity; Q s is the calorific value of steam, Q s = 3.684 × 1000 MJ / t. If it is power generation by a boiler system, then a e / a s = 2.5; if it is power generation by a turbine system, then a e / a s = 2.

[0028] The electricity consumption of chemical plants generally uses self-generated electricity, but when self-generated electricity cannot meet the demand, grid-connected electricity will also be used. When grid-connected electricity is used, the electricity emission factor is calculated as a weighted average of grid-connected electricity and self-generated electricity, that is, E e1 = n 1 × E 1 + n 0 × E 0 .

[0029] Among them, n 1 is the proportion of self-generated electricity consumption in the total electricity consumption, n 0 is the proportion of grid-connected electricity consumption in the total electricity consumption, E 0 is the electricity emission factor of grid-connected electricity, and E o is determined according to the following principles:

[0030] In the North China region, E o is 0.968; in the Northeast region, E o is 1.1082; in the East China region, E o is 0.8046; in the Central China region, E o is 0.9014; in the Northwest region, E o is 0.9155; in the South region, E o is 0.8367.

[0031] The calculation formulas for other emission factors in S22 are as follows:

[0032] E 2 = (∑q j × E j ) / P i ;

[0033] In the formula, q j is the energy consumption during the use of other emission sources; E j is the emission factor of the energy consumed during the use of other emission sources; P i is the usage amount of other emission sources.

[0034] Furthermore, the method for S3 to determine the proportion coefficient of each unit device according to the basic information and data in the petrochemical product production stage is to use the backward deduction method to determine the proportion coefficient of each unit device in the reverse process of the production process.

[0035] Taking the unit device that directly produces the target petrochemical product as the benchmark, the proportion coefficient of the previous unit device is deduced step by step in the reverse process of the production process. If all the materials processed by a certain unit device come from the same previous unit device or the previous unit device only provides processed materials for a certain subsequent unit device, then the proportion coefficient of the previous unit device is the same as that of the subsequent unit device; if the processed materials of a certain unit device come from two or more previous unit devices, then the proportion coefficient of the previous unit device is distributed according to the weight ratio of the processed materials provided for the subsequent unit device; if a certain unit device provides processed materials for two or more subsequent unit devices, then the proportion coefficient of the previous unit device is the sum of the proportion coefficients of the subsequent unit devices.

[0036] Furthermore, the carbon emission coefficient of each emission source and / or the carbon emission coefficient of each unit device in S4 is e 1 , and its calculation method is to calculate using the following formula:

[0037] e 1 = ∑(q i × E i × n i / P i )

[0038] In the formula, q i is the emission source consumption of the unit device; E i is the carbon emission factor of the emission source; n i is the proportion coefficient of the unit device; P i is the processing amount of the unit device.

[0039] Step S4 may further include the following steps: calculating the total carbon emission coefficient of all emission sources and / or the total carbon emission coefficient of each unit device, and this total carbon emission coefficient is e 2 , and calculating using the following formula:

[0040] e 2 = ∑e 1i

[0041] In the formula, e 1iThe carbon emission factors of each emission source calculated in S4 and / or the carbon emission factors of each unit device.

[0042] Furthermore, the carbon emission intensity of each emission source in the petrochemical product production stage in S5 is I and / or the carbon emission intensity of each unit device is S. The calculation method is to use the following calculation formula for calculation:

[0043]

[0044] In the formula, e 1i is the carbon emission factor of each emission source calculated in S4 and / or the carbon emission factor of each unit device, and e 2 is the total carbon emission factor of the emission source and / or the total carbon emission factor of each unit device.

[0045] Another aspect of the present invention is to provide a calculation device for the carbon emission intensity in the petrochemical product production process. The calculation device includes:

[0046] A data extraction unit for obtaining the basic information and data in the petrochemical product production stage and extracting the energy consumption data involved in the petrochemical product production process;

[0047] A carbon emission factor calculation unit for calculating the carbon emission factors of each emission source according to the energy consumption data;

[0048] A unit device proportion coefficient calculation unit for determining the proportion coefficient of each unit device according to the basic information and data in the petrochemical product production stage;

[0049] A carbon emission coefficient calculation unit for calculating the carbon emission coefficients of each emission source and / or the carbon emission coefficients of each unit device according to the carbon emission factors of each emission source and the proportion coefficients of each unit device;

[0050] A carbon emission intensity calculation unit for calculating the carbon emission intensity of each emission source and / or the carbon emission intensity of each unit device in the petrochemical product production stage according to the carbon emission coefficients of each emission source and / or the carbon emission coefficients of each unit device.

[0051] For the data extraction and calculation process of this calculation device, please refer to the specific calculation method process above.

[0052] The present invention also simultaneously provides a memory including a software program, and the software program is suitable for being executed by a processor to perform the steps of the calculation method as described above.

[0053] The method provided by the present invention can accurately calculate the carbon emission intensity of emission sources and / or unit devices in the petrochemical product production process, and achieve accurate identification of carbon emission hotspots in the petrochemical product production process. It can avoid enterprises grasping the wrong key points when implementing energy-saving and carbon-reduction technologies, and can effectively provide support for enterprises to accurately implement emission reduction technologies. Description of the Drawings

[0054] Figure 1 It is a schematic diagram of the calculation method for carbon emission intensity in the production process of petrochemical products listed in the embodiments of the present invention;

[0055] Figure 2 It is a schematic diagram of the production process flow of jet fuel products shown in the embodiments of the present invention;

[0056] Figure 3 It is a schematic diagram of the device for calculating carbon emission intensity in the production process of petrochemical products shown in the embodiments of the present invention. Detailed Embodiments

[0057] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments.

[0058] Embodiment 1

[0059] The embodiments of the present invention provide a method for calculating the carbon emission intensity in the production process of petrochemical products. As Figure 1 shown, the method includes the following steps:

[0060] S1 Obtain the basic information and data of the petrochemical product production stage, and extract the energy consumption data involved in the petrochemical product production process;

[0061] S2 Calculate the carbon emission factors of each emission source according to the energy consumption data;

[0062] S3 Determine the proportion coefficient of each unit device according to the basic information and data of the petrochemical product production stage;

[0063] S4 Calculate the carbon emission coefficient of each emission source and / or the carbon emission coefficient of each unit device according to the carbon emission factors of each emission source and the proportion coefficient of each unit device;

[0064] S5 Calculate the carbon emission intensity of each emission source and / or the carbon emission intensity of each unit device in the petrochemical product production stage according to the carbon emission coefficient of each emission source and / or the carbon emission coefficient of each unit device.

[0065] The method for obtaining the basic information and data of the petrochemical product production stage and extracting the energy consumption data involved in the petrochemical product production process in S1 includes:

[0066] S11 Select the petrochemical product to be accounted for, obtain the production process and background data of the petrochemical product. In the embodiment, a certain refinery's jet fuel product is selected as the research object by using the above method, and the background data of the refinery is obtained, including production overview, device ownership, processing capacity, principle flow chart of unit devices, material flow chart, etc., to determine the production process of the product.

[0067] S12 Draw a production flow chart of petrochemical products based on the production process and background data of petrochemical products. According to the above method, the production flow chart should be drawn strictly in accordance with the production process, including all unit devices used from crude oil to product jet fuel, and clarify the material flow and energy flow between unit devices. The production flow chart of product jet fuel is as Figure 2 shown.

[0068] The production process of jet fuel in this refinery: After the crude oil is transported into the factory through pipelines and stored in the crude oil tank farm, it is then processed by the atmospheric and vacuum distillation unit to produce jet fuel feedstock, and the jet fuel feedstock enters two sets of jet fuel hydrogenation units respectively to become product jet fuel.

[0069] The production process boundary of this jet fuel product is as Figure 2 shown by the framed line in the figure. It includes the whole process from the transportation of crude oil into the factory to the processing and production of products.

[0070] S13 According to the production flow chart, clarify the unit devices involved in the production process of petrochemical products, and obtain the relevant energy consumption data of the unit devices. According to Figure 2 the production flow chart of jet fuel, clarify that the unit devices involved in the production process of this jet fuel product include the crude oil tank farm, the atmospheric and vacuum distillation unit, jet fuel hydrogenation unit A and jet fuel hydrogenation unit B. The energy consumption data of each unit device is shown in Table 1.

[0071] Table 1 Energy consumption data sheet of each unit device

[0072] Emission source Crude oil tank farm Atmospheric and vacuum distillation Aviation kerosene hydrogenation unit A Aviation kerosene hydrogenation unit B Unit processing capacity (t) 3586135 3586135 232638 381697 Fuel gas (t) 35326 1658 Electricity (MWh) 5455 22833 2211 3695 Steam (t) 4930 73000 2622 1100 Fresh water (t) 15878 34500 3006 5635 Circulating water (t) 9189825 2399526 256130 Demineralized water (t) 36100 1100 10003 <![CDATA[Nitrogen (Nm 3 )]]> 15081 98331 103796 <![CDATA[Compressed air (Nm 3 )]]> 890012 2382836 461597 553033

[0073] S2 Calculate the carbon emission factors of each emission source according to the energy consumption data.

[0074] Clarify the types of emission sources in the production process of petrochemical products in S2: According to the energy consumption data of each unit device provided in Table 1, determine that the types of carbon emission sources in the production process of this jet fuel product are fuel gas, electricity, steam, fresh water, circulating water, demineralized water, nitrogen and compressed air.

[0075] Furthermore, the calculation method of the carbon emission factors of the emission sources described in S2 includes:

[0076] S21 Classify the emission sources in the energy consumption data into four types according to their different energy or material consumption sources: fuel emission sources, electricity emission sources, steam emission sources and other emission sources;

[0077] S22 According to the classification standard of S21, classify the carbon emission factors into fuel emission factors, electricity emission factors, steam emission factors and other emission factors, and obtain each emission factor respectively.

[0078] Among them, the fuel emission factors are known fixed values, which are: fuel oil, 3.2366; fuel gas, 2.6528; water coal slurry, 1.78; coke, 2.8655; diesel, 3.288; anthracite, 1.9162, unit: tCO 2 / t.

[0079] Further calculate other emission factors respectively.

[0080] First step, calculate the power emission factor and steam emission factor. This refinery uses petroleum coke, fuel oil, fuel gas and coal as fuels for self-generation and steam production, and all the self-generated electricity is not put on the grid. The data is shown in Table 2.

[0081] Table 2 Statistical table of fuel consumption, self-generated electricity and steam volume

[0082]

[0083] The calculation process is as follows:

[0084] First, calculate the calorific value emission factor a of electricity e and the calorific value emission factor a of steam s , and the calculation formula is as follows:

[0085] ∑q f ×E f = a e ×q e ×Q e + a s ×q s ×Q s , and in this embodiment, a boiler-type system is used for power generation, so a e / a s = 2.5. The statistical table of fuel consumption, self-generated electricity and steam volume is shown in Table 2, and the fuel emission factors are known fixed values, which are: coke, 2.8655; fuel oil, 3.2366; fuel gas, 2.6528; anthracite, 1.9162; thus it can be deduced that:

[0086] a s =(∑q f ×E f ) / (2.5×q e ×Q e +q s ×Q s )

[0087] a s=(62355×2.8655 + 4521×3.2366 + 368×2.6528 + 124856×1.9162) / (2.5×354462.3×3.6×1000 + 238111×3.684×1000)=1.0659×10 -4 tCO 2 / MJ

[0088] a e =2.5a s =2.5×1.0659×10 -4 =2.6647×10 -4 tCO 2 / MJ

[0089] Next, calculate the electricity emission factor E of the electricity emission source e and the steam emission factor E of the steam emission source s , and the calculation formula is: E e =a e ×Q e , E s =a s ×Q s .

[0090] E e =a e ×Q e =2.6647×10 -4 ×3.6×1000 = 0.9593tCO 2 / MWh

[0091] E s =a s ×Q s =1.0659×10 -4 ×3.684×1000 = 0.3927tCO 2 / t.

[0092] In the second step, calculate the other emission factors of other emission sources. Here, other emission sources include: fresh water, circulating water, demineralized water, nitrogen, and compressed air. This refinery uses a barge and pumps to draw fresh water from a certain water area to supply the production of jet fuel products.

[0093] Calculate the emission factor of fresh water. The calculation process is as follows:

[0094] The energy consumption report of the drawn fresh water is listed in Table 3.

[0095] Table 3 Energy Consumption Report of Fresh Water

[0096]

[0097]

[0098] The fresh water emission factor is E 2w , and the calculation formula is as follows:

[0099] E 2w =(∑q j ×E j ) / P i ;

[0100] In the formula, q j is the energy consumption during the use of fresh water, which is the power consumption here (unit: MWh); E j is the emission factor of the energy consumed during the use of fresh water, which is the electricity emission factor here (unit: tCO 2 / MWh). It can be seen from the calculation result of the first step that this value is 0.9593 tCO 2 / MWh; P i is the usage of other emission sources, which is the fresh water volume here (unit: t).

[0101] Then the fresh water emission factor is E 2w

[0102] E 2w =(4562.8 + 1153.7)MWh×0.9593tCO 2 / MWh / 8816451t = 0.0006 tCO 2 / t

[0103] Calculate the emission factor of recycled water.

[0104] This refinery is equipped with a recycled water plant to meet the use of recycled water required for production. The calculation process of the emission factor of recycled water is as follows: Extract the energy consumption report of the recycled water plant and list it in Table 4.

[0105] Table 4 Energy Consumption Report of Recycled Water Plant

[0106]

[0107] The recycled water emission factor is E 2c , and the calculation formula is as follows:

[0108] E 2c =(∑q j ×E j ) / P i ;

[0109] In the formula, q j is the consumption listed in Table 4 during the use of recycled water (unit: t or MWh), including the consumption of fresh water, steam and electricity; E jEmission factor of substances consumed during the use of circulating water (unit: tCO 2 / t or tCO 2 / MWh), where they are the emission factors of fresh water, steam and electricity respectively. From the calculation results in the previous part of this embodiment, it can be known that: the emission factor of fresh water is 0.0006 tCO 2 / t, the emission factor of steam is 0.3927 tCO 2 / t, and the emission factor of electricity is 0.9593 tCO 2 / MWh; P i is the consumption of other emission sources, which is the circulating water volume here.

[0110] Then the emission factor of circulating water is E 2c

[0111] E 2c =(3248961 t × 0.0006 tCO 2 / t + 298 t × 0.3927 tCO 2 / t + 45623.8 MWh × 0.9593 tCO 2 / MWh) / 229645163 t = 0.0002 tCO 2 / t;

[0112] Calculate the emission factor of nitrogen. The calculation process is as follows:

[0113] The nitrogen in this refinery is obtained from the nitrogen production device. The energy consumption data of the nitrogen production device is listed in Table 5.

[0114] Table 5 Energy consumption table of nitrogen production device

[0115]

[0116] The emission factor of nitrogen is E 2c , and the calculation formula is as follows:

[0117] E 2N2 =(∑q j ×E j ) / P i ;

[0118] In the formula, q j is the consumption listed in Table 5 during the acquisition and use of nitrogen, including the consumption of circulating water, steam and electricity (unit: t or MWh); E j is the emission factor of substances consumed during the acquisition and use of nitrogen, which are the emission factors of circulating water, steam and electricity respectively (unit: tCO 2 / t or tCO 2 / MWh). From the calculation results in the previous part of this embodiment, it can be known that the circulating water emission factor is 0.0002 tCO 2 / t, the steam emission factor is 0.3927 tCO 2 / t, and the electricity emission factor is 0.9593 tCO 2 / MWh; P i is the consumption of other emission sources, which is the nitrogen amount here.

[0119] Then the nitrogen emission factor is E 2N2

[0120] E 2N2 =(864979 t × 0.0002 tCO 2 / t + 6980 t × 0.3927 tCO 2 / t + 5638 MWh × 0.9593 tCO 2 / MWh) / 12485937 Nm 3 = 0.0007 tCO 2 / Nm 3

[0121] Calculate the emission factor of demineralized water. The calculation process is as follows:

[0122] The treatment of demineralized water in this refinery is responsible for by the chemical water section. The energy consumption data of the chemical water section are listed in Table 6.

[0123] Table 6 Energy Consumption Report of Chemical Water Section

[0124]

[0125] The emission factor of demineralized water is E 2rs , and the calculation formula is as follows:

[0126] E 2rs =(∑q j × E j ) / P i ;

[0127] In the formula, q j is the consumption listed in Table 6 during the acquisition and use of demineralized water, including the consumption of fresh water, electricity and nitrogen (unit: t or MWh or Nm 3 ); E j is the emission factor of the substances consumed during the acquisition and use of demineralized water, which are the fresh water, electricity and nitrogen emission factors respectively (unit: tCO 2 / t or tCO 2 / MWh or tCO 2 / Nm 3)。From the calculation results in the previous part of this embodiment, it can be seen that the fresh water emission factor is 0.0006 tCO 2 / t, the electricity emission factor is 0.9593 tCO 2 / MWh, and the nitrogen emission factor is 0.0007 tCO 2 / Nm 3 ; P i is the consumption of other emission sources, which is the desalted water volume here.

[0128] Then the desalted water emission factor is E 2rs

[0129] E 2rs =(3945862 t × 0.0006 tCO 2 / t + 4168.232 MWh × 0.9593 tCO 2 / MWh + 5568491 Nm 3 × 0.0007 tCO 2 / Nm 3 ) / 4695523 t = 0.0022 tCO 2 / t

[0130] Calculate the emission factor of compressed air. The calculation process is as follows:

[0131] This refinery is equipped with an air compressor station to obtain compressed air. The energy consumption data of the air compressor station is listed in Table 7.

[0132] Table 7 Energy Consumption Report of Air Compressor Station

[0133]

[0134] The emission factor of compressed air is E 2a , and the calculation formula is as follows:

[0135] E 2a =(∑q j × E j ) / P i ;

[0136] In the formula, q j is the consumption listed in Table 7 during the acquisition and use of compressed air, including the consumption of circulating water and electricity (unit: t or MWh); E j is the emission factor of the substances consumed during the acquisition and use of compressed air, which are the circulating water and electricity emission factors respectively (unit: tCO 2 / t or tCO 2 / MWh). From the calculation results in the previous part of this embodiment, it can be seen that the circulating water emission factor is 0.0002 tCO 2 / t, and the electricity emission factor is 0.9593 tCO2 / MWh; P i Usage for other emission sources, which is the compressed air volume here.

[0137] Then the compressed air emission factor E 2a is:

[0138] E 2a =(4591358 t × 0.0002 tCO 2 / t + 49762.55 MWh × 0.9593 tCO 2 / MWh) / 251648651 Nm 3 = 0.0002 tCO 2 / Nm 3 .

[0139] Furthermore, the method for S3 to determine the proportion coefficient of each unit device according to the basic information and data in the petrochemical product production stage is to use the backward deduction method to determine the proportion coefficient of each unit device in the reverse process of the production process. This embodiment mainly determines the proportion coefficient of each unit device in the production process of jet fuel products.

[0140] From Figure 2 it can be seen that the unit devices producing jet fuel products are jet fuel hydrogenation unit A and jet fuel hydrogenation unit B. The proportion coefficients of the previous unit devices are deduced step by step in the reverse process of the production process. The product jet fuel is produced by two unit devices, jet fuel hydrogenation unit A and jet fuel hydrogenation unit B. Among them, jet fuel hydrogenation unit A produces 40% of the product jet fuel, and jet fuel hydrogenation unit B produces 60% of the product jet fuel. Then the proportion coefficient of jet fuel hydrogenation unit A is 0.4, and the proportion coefficient of jet fuel hydrogenation unit B is 0.6. The processing raw materials of jet fuel hydrogenation unit A and jet fuel hydrogenation unit B both come from the atmospheric and vacuum distillation unit. Then the proportion coefficient of the atmospheric and vacuum distillation unit is the sum of the proportion coefficients of jet fuel hydrogenation unit A and jet fuel hydrogenation unit B, that is, the proportion coefficient of the atmospheric and vacuum distillation unit is 1. The raw materials processed by the atmospheric and vacuum distillation unit all come from the crude oil tank farm. Then the proportion coefficient of the crude oil tank farm is the same as that of the atmospheric and vacuum distillation unit, which is also 1.

[0141] S4 calculates the carbon emission coefficient of each emission source and / or the carbon emission coefficient of each unit device according to the carbon emission factor of each emission source and the proportion coefficient of each unit device.

[0142] In the first step, calculate the carbon emission coefficient of fuel gas in the jet fuel production process. The specific calculation process is as follows:

[0143] The emission coefficient calculation formula of the emission source is:

[0144] e 1 = ∑(q i × E i × n i / Pi )

[0145] In the formula, q i is the emission source consumption of the unit device; E i is the carbon emission factor of the emission source; n i is the specific gravity coefficient of the unit device; P i is the processing volume of the unit device. Here, q i is the consumption of fuel gas of each unit device shown in Table 1; n i is the specific gravity coefficient of each unit device determined by the aforementioned method; P i is the processing volume of each unit device shown in Table 1.

[0146] From the above method, the carbon emission factor E i of each emission source is a calculated value. From the aforementioned calculation, the emission factors of each emission source are: for electricity, 0.9593 tCO 2 / MWh; for fuel gas, 2.6528 tCO 2 / t; for steam, 0.3927 tCO 2 / t; for fresh water, 0.0006 tCO 2 / t; for circulating water, 0.0002 tCO 2 / t; for demineralized water, 0.0022 tCO 2 / t; for nitrogen, 0.0007tCO 2 / Nm 3 ; for compressed air, 0.0002 tCO 2 / Nm 3 . Here, E i takes the value of 2.6528 tCO 2 / t.

[0147] Substitute each parameter into the formula for calculation to obtain the carbon emission coefficient of fuel gas in the jet fuel production process:

[0148] 35326×2.6528×1 / 3586135+1658×2.6528×0.4 / 232638 = 0.03370tCO 2 / t

[0149] Second step, calculate the carbon emission coefficient of electricity in the jet fuel production process. The specific calculation process is as follows:

[0150] The emission coefficient calculation formula of the emission source is:

[0151] e 1 = ∑(q i ×E i ×n i / P i )

[0152] In the formula, q i is the emission source consumption of the unit device; E i is the carbon emission factor of the emission source; n i is the specific gravity coefficient of the unit device; P i is the processing volume of the unit device. Here, q i is the power consumption of each unit device shown in Table 1; n i is the specific gravity coefficient of each unit device determined by the foregoing method; P i is the processing volume of each unit device shown in Table 1.

[0153] From the above method, the carbon emission factor E i of each emission source is a calculated value. From the foregoing calculation, the emission factors of each emission source are: for electricity, 0.9593 tCO 2 / MWh; for fuel gas, 2.6528 tCO 2 / t; for steam, 0.3927 tCO 2 / t; for fresh water, 0.0006 tCO 2 / t; for circulating water, 0.0002 tCO 2 / t; for demineralized water, 0.0022 tCO 2 / t; for nitrogen, 0.0007 tCO 2 / Nm 3 ; for compressed air, 0.0002 tCO 2 / Nm 3 . Here, E i takes the value of 0.9593 tCO 2 / MWh.

[0154] Substitute each parameter into the formula for calculation to obtain the carbon emission coefficient of electricity in the jet fuel production process:

[0155] 5455×0.9593×1 / 3586135 + 22833×0.9593×1 / 3586135 + 2211×0.9593×0.4 / 232638 + 3695×0.9593×0.6 / 381697 = 0.01679 tCO 2 / t

[0156] Third step, calculate the carbon emission coefficient of steam in the jet fuel production process. The specific calculation process is as follows:

[0157] The emission coefficient calculation formula of the emission source is:

[0158] e 1 = ∑(q i × E i × n i / P i )

[0159] where q i is the emission source consumption of the unit device; E i is the carbon emission factor of the emission source; n i is the specific gravity coefficient of the unit device; P i is the processing volume of the unit device. Here, q i is the steam consumption of each unit device shown in Table 1; n i is the specific gravity coefficient of each unit device determined by the aforementioned method; P i is the processing volume of each unit device shown in Table 1.

[0160] From the above method, the carbon emission factor E i of each emission source is a calculated value. From the aforementioned calculation, the emission factors of each emission source are: for electricity, 0.9593 tCO 2 / MWh; for fuel gas, 2.6528 tCO 2 / t; for steam, 0.3927 tCO 2 / t; for fresh water, 0.0006 tCO 2 / t; for circulating water, 0.0002 tCO 2 / t; for demineralized water, 0.0022 tCO 2 / t; for nitrogen, 0.0007 tCO 2 / Nm 3 ; for compressed air, 0.0002 tCO 2 / Nm 3 . Here, E i takes the value of 0.3927 tCO 2 / t.

[0161] Substitute each parameter into the formula for calculation to obtain the carbon emission coefficient of steam in the jet fuel production process:

[0162] 4930×0.3927×1 / 3586135 + 73000×0.3927×1 / 3586135 + 2622×0.3927×0.4 / 232638 + 1100×0.3927×0.6 / 381697 = 0.01098 tCO 2 / t.

[0163] Fourth step, calculate the carbon emission coefficient of fresh water in the jet fuel production process. The specific calculation process is as follows:

[0164] The emission coefficient calculation formula for the emission source is:

[0165] e 1 = ∑(q i × E i × n i / Pi )

[0166] In the formula, q i is the emission source consumption of the unit device; E i is the carbon emission factor of the emission source; n i is the specific gravity coefficient of the unit device; P i is the processing volume of the unit device. Here, q i is the fresh water consumption of each unit device shown in Table 1; n i is the specific gravity coefficient of each unit device determined by the aforementioned method; P i is the processing volume of each unit device shown in Table 1.

[0167] From the above method, it is known that the carbon emission factor E i of each emission source is a calculated value. From the aforementioned calculation, the emission factors of each emission source are: for electricity, 0.9593 tCO 2 / MWh; for fuel gas, 2.6528 tCO 2 / t; for steam, 0.3927 tCO 2 / t; for fresh water, 0.0006 tCO 2 / t; for circulating water, 0.0002 tCO 2 / t; for demineralized water, 0.0022 tCO 2 / t; for nitrogen, 0.0007 tCO 2 / Nm 3 ; for compressed air, 0.0002 tCO 2 / Nm 3 . Here, E i takes a value of 0.0006 tCO 2 / t.

[0168] Substitute each parameter into the formula for calculation to obtain the carbon emission coefficient of fresh water in the jet fuel production process:

[0169] 15878×0.0006×1 / 3586135 + 34500×0.0006×1 / 3586135 + 3006×0.0006×0.4 / 232638 + 5635×0.0006×0.6 / 381697 = 1.684×10 -5 tCO 2 / t.

[0170] Step 5, calculate the carbon emission coefficient of circulating water in the jet fuel production process. The specific calculation process is as follows:

[0171] The emission coefficient calculation formula of the emission source is:

[0172] e 1 = ∑(q i × Ei × n i / P i )

[0173] In the formula, q i is the consumption of the emission source of the unit device; E i is the carbon emission factor of the emission source; n i is the specific gravity coefficient of the unit device; P i is the processing volume of the unit device. Here, q i is the consumption of circulating water of each unit device shown in Table 1; n i is the specific gravity coefficient of each unit device determined by the foregoing method; P i is the processing volume of each unit device shown in Table 1.

[0174] From the above method, the carbon emission factor E of each emission source i is a calculated value. From the foregoing calculation, the emission factors of each emission source are: for electricity, 0.9593 tCO 2 / MWh; for fuel gas, 2.6528 tCO 2 / t; for steam, 0.3927 tCO 2 / t; for fresh water, 0.0006 tCO 2 / t; for circulating water, 0.0002 tCO 2 / t; for demineralized water, 0.0022 tCO 2 / t; for nitrogen, 0.0007 tCO 2 / Nm 3 ; for compressed air, 0.0002 tCO 2 / Nm 3 . Here, E i takes a value of 0.0002 tCO 2 / t.

[0175] Substitute each parameter into the formula for calculation to obtain the carbon emission coefficient of circulating water in the process of jet fuel production:

[0176] 9189825 × 0.0002 × 1 / 3586135 + 2399526 × 0.0002 × 0.4 / 232638 + 256130 × 0.0002 × 0.6 / 381697 = 1.418 × 10 -3 tCO 2 / t.

[0177] Step 6, calculate the carbon emission coefficient of demineralized water in the process of jet fuel production. The specific calculation process is as follows:

[0178] The emission coefficient calculation formula of the emission source is:

[0179] e 1 = ∑(qi ×E i ×n i / P i )

[0180] In the formula, q i is the consumption of the emission source of the unit device; E i is the carbon emission factor of the emission source; n i is the specific gravity coefficient of the unit device; P i is the processing volume of the unit device. Here, q i is the consumption of demineralized water of each unit device shown in Table 1; n i is the specific gravity coefficient of each unit device determined by the foregoing method; P i is the processing volume of each unit device shown in Table 1.

[0181] From the above method, the carbon emission factor E i of each emission source is a calculated value. From the foregoing calculation, the emission factors of each emission source are: for electricity, 0.9593 tCO 2 / MWh; for fuel gas, 2.6528 tCO 2 / t; for steam, 0.3927 tCO 2 / t; for fresh water, 0.0006 tCO 2 / t; for circulating water, 0.0002 tCO 2 / t; for demineralized water, 0.0022 tCO 2 / t; for nitrogen, 0.0007 tCO 2 / Nm 3 ; for compressed air, 0.0002 tCO 2 / Nm 3 . Here, E i takes the value of 0.0022 tCO 2 / t.

[0182] Substitute each parameter into the formula for calculation to obtain the carbon emission coefficient of demineralized water in the process of jet fuel production:

[0183] 36100×0.0022×1 / 3586135 + 1100×0.0022×0.4 / 232638 + 10003×0.0022×0.6 / 381697 = 6.09×10 -5 tCO 2 / t.

[0184] Step 7, calculate the carbon emission coefficient of nitrogen in the process of jet fuel production. The specific calculation process is as follows:

[0185] The formula for the emission coefficient of the emission source is:

[0186] e 1= ∑(q i × E i × n i / P i )

[0187] Wherein, q i is the emission source consumption of the unit device; E i is the carbon emission factor of the emission source; n i is the specific gravity coefficient of the unit device; P i is the processing volume of the unit device. Here, q i is the consumption of nitrogen gas of each unit device shown in Table 1; n i is the specific gravity coefficient of each unit device determined in Example 1; P i is the processing volume of each unit device shown in Table 1.

[0188] From the above method, it is known that the carbon emission factor E i of each emission source is a calculated value. From the foregoing calculations, the emission factors of each emission source are: for electricity, 0.9593 tCO 2 / MWh; for fuel gas, 2.6528 tCO 2 / t; for steam, 0.3927 tCO 2 / t; for fresh water, 0.0006 tCO 2 / t; for circulating water, 0.0002 tCO 2 / t; for demineralized water, 0.0022 tCO 2 / t; for nitrogen gas, 0.0007 tCO 2 / Nm 3 ; for compressed air, 0.0002 tCO 2 / Nm 3 . Here, E i takes the value of 0.0007 tCO 2 / Nm 3 .

[0189] Substitute each parameter into the formula for calculation to obtain the carbon emission coefficient of nitrogen gas in the process of jet fuel production:

[0190] 15081×0.0007×1 / 3586135 + 98331×0.0007×0.4 / 232638 + 103796×0.0007×0.6 / 381697 = 2.355×10 -4 tCO 2 / t.

[0191] Step 8, calculate the carbon emission coefficient of compressed air in the process of jet fuel production. The specific calculation process is as follows:

[0192] The emission coefficient calculation formula of the emission source is:

[0193] e 1 = ∑(q i × E i × n i / P i )

[0194] In the formula, q i is the emission source consumption of the unit device; E i is the carbon emission factor of the emission source; n i is the specific gravity coefficient of the unit device; P i is the processing volume of the unit device. Here, q i is the consumption of compressed air of each unit device shown in Table 1; n i is the specific gravity coefficient of each unit device determined by the aforementioned method; P i is the processing volume of each unit device shown in Table 1.

[0195] From the above method, it is known that the carbon emission factor E i of each emission source is a calculated value. From the aforementioned calculation, the emission factors of each emission source are: for electricity, 0.9593 tCO 2 / MWh; for fuel gas, 2.6528 tCO 2 / t; for steam, 0.3927 tCO 2 / t; for fresh water, 0.0006 tCO 2 / t; for circulating water, 0.0002 tCO 2 / t; for demineralized water, 0.0022 tCO 2 / t; for nitrogen, 0.0007 tCO 2 / Nm 3 ; for compressed air, 0.0002 tCO 2 / Nm 3 . Here, E i takes the value of 0.0002 tCO 2 / Nm 3 .

[0196] Substitute each parameter into the formula for calculation to obtain the carbon emission coefficient of compressed air in the process of jet fuel production:

[0197] 890012 × 0.0002 × 1 / 3586135 + 2382836 × 0.0002 × 1 / 3586135 + 461597 × 0.0002 × 0.4 / 232638 + 553033 × 0.0002 × 0.6 / 381697 = 5.152 × 10 -4 tCO 2 / t.

[0198] Step 9, calculate the total carbon emission coefficient of all emission sources in the process of jet fuel production. The specific calculation process is as follows:

[0199] The calculation formula is:

[0200] e 2 = ∑e 1i

[0201] In the formula, e 1i is the carbon emission coefficient of the emission source calculated in S3. Here, the value of e 1i is the emission coefficients of the 8 emission sources calculated in the above first step - eighth step. Substitute each parameter into the formula for calculation to obtain the total carbon emission coefficient of all emission sources during the production process of product jet fuel:

[0202] 0.0337 + 0.01679 + 0.01098 + 1.684×10 -5 + 1.418×10 -3 + 6.09×10 -5 + 2.355×10 -4 + 5.152×10 -4 = 0.06372 tCO 2 / t.

[0203] Furthermore, calculate the carbon emission coefficient of each unit device during the production process of jet fuel and the total carbon emission coefficient of all unit devices.

[0204] First step, calculate the carbon emission coefficient of the crude oil tank farm during the production process of jet fuel. The specific calculation process is as follows:

[0205] The calculation formula is:

[0206] e 1 = ∑(q i × E i × n i / P i )

[0207] In the formula, q i is the consumption of the emission source during the production process of the unit device; E i is the emission factor of the emission source; n i is the specific gravity coefficient of the device; P i is the processing volume of the device.

[0208] Here, the emission factor E i of each emission source is the calculated value. From the above calculation, the emission factors of each emission source are: for electricity, 0.9593 tCO 2 / MWh; for fuel gas, 2.6528 tCO 2 / t; for steam, 0.3927 tCO 2 / t; for fresh water, 0.0006 tCO 2 / t; Recirculating water, 0.0002 tCO 2 / t; Demineralized water, 0.0022 tCO 2 / t; Nitrogen, 0.0007 tCO 2 / Nm 3 ; Compressed air, 0.0002 tCO 2 / Nm 3 。

[0209] Here, q i is the consumption of each emission source in the crude oil tank farm during the production process of jet fuel, as shown in Table 1; P i is the processing volume of the crude oil tank farm, as shown in Table 1, which is 3586135 t; n i is the specific gravity coefficient of the crude oil tank farm during the production process of jet fuel, which is calculated to be 1 as described above.

[0210] Substitute each parameter into the formula to calculate the carbon emission coefficient of the crude oil tank farm during the production process of jet fuel:

[0211] (5455×0.9593 + 4930×0.3927 + 15878×0.0006 + 890012×0.0002)×1 / 3586135 = 0.002051 tCO 2 / t.

[0212] Second step, calculate the carbon emission coefficient of the atmospheric and vacuum distillation unit during the production process of jet fuel. The specific calculation process is as follows:

[0213] The calculation formula is:

[0214] e 1 = ∑(q i ×E i ×n i / P i )

[0215] In the formula, q i is the consumption of the emission source during the production process of the unit device; E i is the emission factor of the emission source; n i is the specific gravity coefficient of the device; P i is the processing volume of the device.

[0216] Here, the carbon emission factor E i of each emission source is the calculated value. It can be seen from the above calculation that the emission factors of each emission source are: electricity, 0.9593 tCO 2 / MWh; fuel gas, 2.6528 tCO 2 / t; steam, 0.3927 tCO 2 / t; fresh water, 0.0006 tCO 2 / t; Recirculating water, 0.0002 tCO 2 / t; Demineralized water, 0.0022 tCO 2 / t; Nitrogen, 0.0007 tCO 2 / Nm 3 ; Compressed air, 0.0002 tCO 2 / Nm 3 。

[0217] Here, q i is the consumption of each emission source in the atmospheric and vacuum distillation unit during the production process of jet fuel, as shown in Table 1; P i is the processing volume of the atmospheric and vacuum distillation unit, as shown in Table 1, which is 3586135 t; n i is the specific gravity coefficient of the atmospheric and vacuum distillation unit during the production process of jet fuel, and is calculated to be 1 from the previous calculation.

[0218] Substitute each parameter into the formula to calculate the carbon emission coefficient of the atmospheric and vacuum distillation unit during the production process of jet fuel:

[0219] (35326×2.6528 + 22833×0.9593 + 73000×0.3927 + 34500×0.0006 + 9189825×0.0002 + 36100×0.0022 + 15081×0.0007 + 2382836×0.0002)×1 / 3586135 = 0.04091 tCO 2 / t

[0220] In the third step, calculate the carbon emission coefficient of jet fuel hydrogenation unit A during the production process of jet fuel. The specific calculation process is as follows:

[0221] The calculation formula is:

[0222] e 1 = ∑(q i ×E i ×n i / P i )

[0223] In the formula, q i is the consumption of the emission source during the production process of the unit device; E i is the emission factor of the emission source; n i is the specific gravity coefficient of the device; P i is the processing volume of the device.

[0224] Here, the carbon emission factor E i of each emission source is the calculated value. From the previous calculation, the emission factors of each emission source are: electricity, 0.9593 tCO 2 / MWh; fuel gas, 2.6528 tCO2 / t; Steam, 0.3927 tCO 2 / t; Fresh water, 0.0006 tCO 2 / t; Recirculating water, 0.0002 tCO 2 / t; Demineralized water, 0.0022 tCO 2 / t; Nitrogen, 0.0007 tCO 2 / Nm 3 ; Compressed air, 0.0002 tCO 2 / Nm 3 。

[0225] Here, q i is the consumption of each emission source of the jet fuel hydrotreating unit A during the jet fuel production process, as shown in Table 1; P i is the processing volume of the jet fuel hydrotreating unit A, as shown in Table 1, which is 232638 t; n i is the specific gravity coefficient of the jet fuel hydrotreating unit A during the jet fuel production process, and is calculated to be 0.4 from the foregoing calculation.

[0226] Substitute each parameter into the formula, and calculate the carbon emission coefficient of the jet fuel hydrotreating unit A during the jet fuel production process:

[0227] (1658×2.6528 + 2211×0.9593 + 2622×0.3927 + 3006×0.0006 + 2399526×0.0002 + 1100×0.0022 + 98331×0.0007 + 461597×0.0002)×0.4 / 232638 = 0.01409 tCO 2 / t.

[0228] Fourth step, calculate the carbon emission coefficient of the jet fuel hydrotreating unit B during the jet fuel production process. The specific calculation process is as follows:

[0229] The calculation formula is:

[0230] e 1 = ∑(q i × E i × n i / P i )

[0231] In the formula, q i is the consumption of the emission source during the production process of the unit device; E i is the emission factor of the emission source; n i is the specific gravity coefficient of the device; P i is the processing volume of the device.

[0232] Here, the carbon emission factor E of each emission source iIs a calculated value. From the foregoing calculations, the emission factors of each emission source are as follows: for electricity, 0.9593 tCO 2 / MWh; for fuel gas, 2.6528 tCO 2 / t; for steam, 0.3927 tCO 2 / t; for fresh water, 0.0006 tCO 2 / t; for circulating water, 0.0002 tCO 2 / t; for demineralized water, 0.0022 tCO 2 / t; for nitrogen, 0.0007 tCO 2 / Nm 3 ; for compressed air, 0.0002 tCO 2 / Nm 3 .

[0233] Here, q i is the consumption of each emission source of the aviation kerosene hydrogenation unit B during the production process of aviation kerosene, as shown in Table 1; P i is the processing volume of the aviation kerosene hydrogenation unit B, as shown in Table 1, which is 381,697 t; n i is the specific gravity coefficient of the aviation kerosene hydrogenation unit B during the production process of aviation kerosene, calculated from Example 1 to be 0.6.

[0234] Substitute each parameter into the formula, and calculate the carbon emission coefficient of the aviation kerosene hydrogenation unit B during the production process of aviation kerosene:

[0235] (3695×0.9593 + 1100×0.3927 + 5635×0.0006 + 256130×0.0002 + 10003×0.0022 + 103796×0.0007 + 553033×0.0002)×0.6 / 381697 = 0.006659 tCO 2 / t.

[0236] Step 5, calculate the total carbon emission coefficient of all unit devices during the production process of aviation kerosene. The specific calculation process is as follows:

[0237] The calculation formula is:

[0238] e 2 = ∑e 1i

[0239] In the formula, e 1i is the carbon emission coefficient of the unit device. Here, it is the carbon emission coefficient of each unit device calculated in Step 1 - Step 4. Substitute each parameter into the formula, and calculate the total carbon emission coefficient of all unit devices during the production process of aviation kerosene:

[0240] 0.002051 + 0.04091 + 0.01409 + 0.006659 = 0.06371 tCO 2 / t.

[0241] Furthermore, calculate the carbon emission intensity of each emission source during the jet fuel production process.

[0242] First step, calculate the carbon emission intensity of fuel gas during the jet fuel production process. The calculation process is as follows:

[0243] The calculation formula is:

[0244]

[0245] In the formula, e 1i is the carbon emission coefficient of the emission source; e 2 is the total carbon emission coefficient of all emission sources. Here, e 1i and e 2 are both obtained from the aforementioned calculations. e 1i takes a value of 0.0337 tCO 2 / t, and e 2 takes a value of 0.06372 tCO 2 / t. Substitute each parameter into the formula to calculate the carbon emission intensity of fuel gas during the jet fuel production process:

[0246] 0.0337 / 0.06372 × 100% = 52.89%

[0247] Second step, calculate the carbon emission intensity of electricity during the jet fuel production process. The calculation process is as follows:

[0248] The calculation formula is:

[0249]

[0250] In the formula, e 1i is the carbon emission coefficient of the emission source; e 2 is the total carbon emission coefficient of all emission sources. Here, e 1i and e 2 are both obtained from the aforementioned calculations. e 1i takes a value of 0.01679 tCO 2 / t, and e 2 takes a value of 0.06372 tCO 2 / t. Substitute each parameter into the formula to calculate the carbon emission intensity of electricity during the jet fuel production process:

[0251] 0.01679 / 0.06372 × 100% = 26.34%

[0252] Step 3: Calculate the carbon emission intensity of steam in the jet fuel production process. The calculation process is as follows:

[0253] The calculation formula is:

[0254]

[0255] In the formula, e 1i is the carbon emission coefficient of the emission source; e 2 is the total carbon emission coefficient of all emission sources. Here, e 1i and e 2 are both obtained from the aforementioned calculations. The value of e 1i is 0.01098 tCO 2 / t, and the value of e 2 is 0.06372 tCO 2 / t. Substitute each parameter into the formula to calculate the carbon emission intensity of steam in the jet fuel production process:

[0256] 0.01098 / 0.06372 × 100% = 17.24%.

[0257] Step 4: Calculate the carbon emission intensity of fresh water in the jet fuel production process. The calculation process is as follows:

[0258] The calculation formula is:

[0259]

[0260] In the formula, e 1i is the carbon emission coefficient of the emission source; e 2 is the total carbon emission coefficient of all emission sources. Here, e 1i and e 2 are both obtained from the aforementioned calculations. The value of e 1i is 1.684×10 -5 tCO 2 / t, and the value of e 2 is 0.06372 tCO 2 / t. Substitute each parameter into the formula to calculate the carbon emission intensity of fresh water in the jet fuel production process:

[0261] 1.684×10 -5 / 0.06372 × 100% = 0.03%.

[0262] Step 5: Calculate the carbon emission intensity of circulating water in the jet fuel production process. The calculation process is as follows:

[0263] The calculation formula is:

[0264]

[0265] In the formula, e1i is the carbon emission factor of the emission source; e 2 is the total carbon emission factor of all emission sources. Here, e 1i and e 2 are both obtained from the aforementioned calculations. e 1i takes the value of 1.418×10 -3 tCO 2 / t, e 2 takes the value of 0.06372 tCO 2 / t. Substitute each parameter into the formula to calculate the carbon emission intensity of circulating water in the jet fuel production process:

[0266] 1.418×10 -3 / 0.06372×100% = 2.22%.

[0267] Step 6: Calculate the carbon emission intensity of demineralized water in the jet fuel production process. The calculation process is as follows:

[0268] The calculation formula is:

[0269]

[0270] In the formula, e 1i is the carbon emission factor of the emission source; e 2 is the total carbon emission factor of all emission sources. Here, e 1i and e 2 are both obtained from the aforementioned calculations. e 1i takes the value of 6.09×10 -5 tCO 2 / t, e 2 takes the value of 0.06372 tCO 2 / t. Substitute each parameter into the formula to calculate the carbon emission intensity of demineralized water in the jet fuel production process:

[0271] 6.09×10 -5 / 0.06372×100% = 0.1%.

[0272] Step 7: Calculate the carbon emission intensity of nitrogen in the jet fuel production process. The calculation process is as follows:

[0273] The calculation formula is:

[0274]

[0275] In the formula, e 1i is the carbon emission factor of the emission source; e 2 is the total carbon emission factor of all emission sources. Here, e 1i and e 2 are both obtained from the aforementioned calculations. e 1iThe value is 2.355×10 -4 tCO 2 / t, e 2 The value is 0.06372 tCO 2 / t. Substitute each parameter into the formula to calculate the carbon emission intensity of nitrogen during the production process of jet fuel:

[0276] 2.355×10 -4 / 0.06372×100% = 0.37%.

[0277] Step 8: Calculate the carbon emission intensity of compressed air during the production process of jet fuel. The calculation process is as follows:

[0278] The calculation formula is:

[0279]

[0280] In the formula, e 1i is the carbon emission coefficient of the emission source; e 2 is the total carbon emission coefficient of all emission sources. Here, e 1i and e 2 are both obtained from the aforementioned calculations. e 1i takes the value of 2.576×10 -4 tCO 2 / t, e 2 takes the value of 0.06372 tCO 2 / t. Substitute each parameter into the formula to calculate the carbon emission intensity of compressed air during the production process of jet fuel:

[0281] 2.152×10 -4 / 0.06372×100% = 0.81%.

[0282] From the aforementioned calculation results, it can be seen that during the production process of jet fuel in this refinery and petrochemical enterprise, the carbon emission intensity of fuel gas is the highest, at 52.89%, which is the most important carbon emission hot spot during the production process of jet fuel; the carbon emission intensities of electricity and steam are the second highest, at 26.34% and 17.24% respectively, which are the main carbon emission hot spots; while fresh water basically has no impact on the carbon emissions during the production process of jet fuel. Therefore, the enterprise should take corresponding measures during the production process to minimize the usage of fuel gas, electricity, and steam during the production process to achieve the goal of carbon reduction.

[0283] Further calculate the carbon emission intensity of each unit device during the production process of jet fuel.

[0284] Step 1: Calculate the carbon emission intensity of the crude oil tank farm during the production process of jet fuel. The specific calculation process is as follows:

[0285] The calculation formula is:

[0286]

[0287] In the formula, e 1i is the carbon emission coefficient of the unit device; e 2 is the total carbon emission coefficient of all unit devices. Here, e 1i is the carbon emission coefficient of the crude oil tank farm during the production process of jet fuel, which is calculated to be 0.002051 tCO 2 / t; e 2 is the total carbon emission coefficient of all unit devices during the production process of jet fuel, which is calculated to be 0.06371 tCO 2 / t. Substitute each parameter into the formula, and calculate the carbon emission intensity of the crude oil tank farm during the production process of jet fuel:

[0288] 0.002051 / 0.06371 × 100% = 3.22%.

[0289] Second step, calculate the carbon emission intensity of the atmospheric and vacuum distillation unit during the production process of jet fuel. The specific calculation process is as follows:

[0290] The calculation formula is:

[0291]

[0292] In the formula, e 1i is the carbon emission coefficient of the unit device; e 2 is the total carbon emission coefficient of all unit devices. Here, e 1i is the carbon emission coefficient of the atmospheric and vacuum distillation unit during the production process of jet fuel, which is calculated to be 0.04091 tCO 2 / t; e 2 is the total carbon emission coefficient of all unit devices during the production process of jet fuel, which is calculated to be 0.06371 tCO 2 / t. Substitute each parameter into the formula, and calculate the carbon emission intensity of the atmospheric and vacuum distillation unit during the production process of jet fuel:

[0293] 0.04091 / 0.06371 × 100% = 64.21%.

[0294] Third step, calculate the carbon emission intensity of jet fuel hydrogenation unit A during the production process of jet fuel. The specific calculation process is as follows:

[0295] The calculation formula is:

[0296]

[0297] In the formula, e 1i is the carbon emission coefficient of the unit device; e 2 is the total carbon emission coefficient of all unit devices. Here, e1i is the carbon emission coefficient of the jet fuel hydrogenation unit A in the jet fuel production process, which is calculated to be 0.01409 tCO 2 / t; e 2 is the total carbon emission coefficient of all unit devices in the jet fuel production process, which is calculated to be 0.06371 tCO 2 / t. Substitute each parameter into the formula, and calculate the carbon emission intensity of the jet fuel hydrogenation unit A in the jet fuel production process:

[0298] 0.01409 / 0.06371 × 100% = 22.12%.

[0299] Step 4: Calculate the carbon emission intensity of the jet fuel hydrogenation unit B in the jet fuel production process. The specific calculation process is as follows:

[0300] The calculation formula is:

[0301]

[0302] In the formula, e 1i is the carbon emission coefficient of the unit device; e 2 is the total carbon emission coefficient of all unit devices. Here, e 1i is the carbon emission coefficient of the jet fuel hydrogenation unit B in the jet fuel production process, which is calculated to be 0.006659 tCO 2 / t; e 2 is the total carbon emission coefficient of all unit devices in the jet fuel production process, which is calculated to be 0.06371 tCO 2 / t. Substitute each parameter into the formula, and calculate the carbon emission intensity of the jet fuel hydrogenation unit B in the jet fuel production process:

[0303] 0.006659 / 0.06371 × 100% = 10.45%.

[0304] From the above calculation results, it can be seen that in the jet fuel production process of this refinery and petrochemical enterprise, the carbon emission intensity of the atmospheric and vacuum distillation unit is the highest, which is 64.21%, and it is the most important carbon emission device in the jet fuel production process; the carbon emission intensity of the jet fuel hydrogenation unit A is the second, which is 22.12%, and it is the main carbon emission device; while the carbon emission intensity of the jet fuel hydrogenation unit B is much lower than that of unit A. Therefore, on the one hand, the enterprise should take corresponding measures to improve the energy efficiency of the unit devices with higher emission intensity during the jet fuel production process; on the other hand, it can increase the production ratio of jet fuel products of the jet fuel hydrogenation unit B with lower carbon emission intensity. By identifying the carbon emission hotspots of the unit devices in the jet fuel production process, more targeted energy-saving technical transformation technologies can be implemented.

[0305] By monitoring and comprehensively analyzing the carbon emissions of unit devices during the actual production process, the refinery found that the carbon emission order of devices during the actual production of jet fuel is: atmospheric and vacuum distillation unit >> jet fuel hydrogenation unit A > jet fuel hydrogenation unit B >> crude oil tank farm, which is consistent with the results obtained by the calculation method provided by the present invention.

[0306] It can be seen that the calculation method provided by the present invention can obtain the carbon emission intensity results of emission sources and unit devices during the production process of petrochemical products, and can more accurately identify the hotspots of greenhouse gas emissions during the production process of refining enterprises. Since only the production stage is under the control of refining enterprises during the whole life cycle of petrochemical products, accurately identifying the hotspots of greenhouse gas emissions during the production process will help enterprises discover the important emission control points in their own production process, so as to more targeted implement emission reduction technologies and clarify the next emission reduction direction of the enterprises.

[0307] Embodiment 2

[0308] The embodiment of the present invention also provides a calculation device for emission intensity, which includes:

[0309] A data extraction unit, configured to obtain the basic information and data of the production stage of petrochemical products, and extract the energy consumption data involved in the production process of petrochemical products;

[0310] A carbon emission factor calculation unit, configured to calculate the carbon emission factors of each emission source according to the energy consumption data;

[0311] A unit device proportion coefficient calculation unit, configured to determine the proportion coefficient of each unit device according to the basic information and data of the production stage of petrochemical products;

[0312] A carbon emission coefficient calculation unit, configured to calculate the carbon emission coefficients of each emission source and / or the carbon emission coefficients of each unit device according to the carbon emission factors of each emission source and the proportion coefficients of each unit device;

[0313] A carbon emission intensity calculation unit, configured to calculate the carbon emission intensity of each emission source and / or the carbon emission intensity of each unit device in the production stage of petrochemical products according to the carbon emission coefficients of each emission source and / or the carbon emission coefficients of each unit device.

[0314] For the data extraction and calculation process of this calculation device, reference can be made to the specific calculation method process described above.

[0315] Since the calculation process and beneficial effects of the carbon emission intensity during the production process of petrochemical products have been recorded and described in the previous embodiments, they can be referred to each other and will not be elaborated here.

[0316] In the embodiment of the present invention, a memory is also provided, where the memory includes a software program, and the software program is suitable for being executed by a processor asFigure 1 Steps of the calculation method

[0317] Embodiments of the present invention can be implemented in the form of software programs, that is, by writing software programs (and instruction sets) for implementing each step in the corresponding carbon emission calculation method. The software programs are stored in a memory, and the memory is provided in a computer device, so that the processor of the computer device can call the software programs to achieve the purpose of the embodiments of the present invention. Figure 1 ​

Claims

1. A calculation method for carbon emission intensity in the production process of petrochemical products, characterized in that, it includes the following steps: S1 Obtain the basic information and data of the petrochemical product production stage, and extract the energy consumption data involved in the petrochemical product production process; S2 Calculate the carbon emission factors of each emission source according to the energy consumption data, including: S21 Divide the emission sources in the energy consumption data into four types according to their energy or material consumption sources: fuel emission sources, electricity emission sources, steam emission sources, and other emission sources; S22 Similarly classify the carbon emission factors into fuel emission factors, electricity emission factors, steam emission factors, and other emission factors according to the classification criteria in S21, and obtain each emission factor respectively; The calculation formulas for the electricity emission factor and the steam emission factor are: E = a × Q; Wherein, E is the electricity or steam emission factor, and the electricity emission factor is E e , and the steam emission factor is E s ; a is the calorific value emission factor of electricity or steam, and the calorific value emission factor of electricity is a e , and the calorific value emission factor of steam is a s ; Q is the calorific value of electricity or steam, and here Q is a constant; Q e is the calorific value of electricity, Q e = 3.6×1000 MJ / MWh; Q s is the calorific value of steam, Q s = 3.684×1000 MJ / t; The power calorific value emission factor a e and the steam calorific value emission factor a s are calculated through the fuel consumption during the self-generation process, and the calculation formula is as follows: ∑q f ×E f =a e ×q e ×Q e +a s ×q s ×Q s where q f is the fuel consumption during the self-generation process; E f is the emission factor of the fuel; a e is the emission factor of the calorific value of electricity; q e is the self-generated electricity; Q e is the calorific value of electricity, Q e = 3.6 × 1000 MJ / MWh; a s is the emission factor of the calorific value of steam; q s is the amount of steam; Q s is the calorific value of steam, Q s = 3.684 × 1000 MJ / t; if it is power generation by a boiler-type system, then a e / a s = 2.5; if it is power generation by a turbine-type system, then a e / a s = 2; The calculation formula for other emission factors is as follows: E 2 = (∑q j × E j ) / P i ; where q j is the energy consumption during the use of other emission sources; E j is the emission factor of the energy consumed during the use of other emission sources; P i is the usage of other emission sources; S3 Determine the proportion coefficient of each unit device according to the basic information and data of the petrochemical product production stage; S4 Calculate the carbon emission coefficient of each emission source and / or the carbon emission coefficient of each unit device according to the carbon emission factors of each emission source and the proportion coefficient of each unit device, including: The carbon emission factor of each emission source and / or the carbon emission factor of each unit device is e 1 , and its calculation method is calculated using the following formula: e 1 = ∑(q i × E i × n i / P i ) where q i is the emission source consumption of the unit device; E i is the carbon emission factor of the emission source; n i is the specific gravity coefficient of the unit device; P i is the processing volume of the unit device; Calculate the total carbon emission factor of all emission sources and / or the total carbon emission factor of each unit device, where the total carbon emission factor is e 2 , and the calculation is performed using the following formula: e2 = ∑e1i where e 1i is the carbon emission factor of each emission source calculated in S4 and / or the carbon emission factor of each unit device; S5 Calculate the carbon emission intensity of each emission source and / or the carbon emission intensity of each unit device in the petrochemical product production stage according to the carbon emission coefficient of each emission source and / or the carbon emission coefficient of each unit device, including: The carbon emission intensity of each emission source in the petrochemical product production stage is I and / or the carbon emission intensity of each unit device is S, and its calculation method is calculated using the following calculation formula: where e 1i is the carbon emission coefficient of each emission source calculated in S4 and / or the carbon emission coefficient of each unit device, and e 2 is the total carbon emission coefficient of the emission source and / or the total carbon emission coefficient of each unit device.

2. According to the calculation method described in claim 1, characterized in that, In S1, the method for obtaining the basic information and data of the petrochemical product production stage and extracting the energy consumption data involved in the petrochemical product production process includes: S11 Select the petrochemical product to be accounted for, and obtain the production process and background data of the petrochemical product; S12 Draw the petrochemical product production flow chart according to the production process and background data of the petrochemical product; S13 According to the production flow chart, clarify the unit devices involved in the petrochemical product production process, and obtain the relevant energy consumption data of the unit devices.

3. According to the calculation method described in claim 1, characterized in that, The petrochemical product is one or more of gasoline, diesel, jet fuel, asphalt, lubricating oil, polyethylene, polypropylene, and caprolactam.

4. According to the calculation method described in claim 1, characterized in that, The unit devices include one or more of atmospheric and vacuum distillation units, fluid catalytic cracking units, jet fuel hydrogenation units, residue hydrogenation units, coking units, reforming units, S-ZORB units, and oil storage tank areas.

5. According to the calculation method described in claim 1, characterized in that, The emission sources include one or more of fuel gas, electricity, steam, fresh water, circulating water, demineralized water, deaerated water, nitrogen, and compressed air.

6. According to the calculation method described in claim 1, characterized in that, In S3, the method for determining the proportion coefficient of each unit device according to the basic information and data of the petrochemical product production stage is to use the backward deduction method to determine the proportion coefficient of each unit device in the reverse process of the production process.

7. According to the calculation method described in claim 6, characterized in that, The backward deduction method is adopted to determine the proportion coefficients of each unit device in the reverse process of the production process. The unit device directly producing the target petrochemical product is used as the benchmark, and the proportion coefficients of the previous unit devices are deduced step by step in the reverse process of the production process.

8. According to the calculation method described in claim 6 or 7, characterized in that if all the materials processed by a certain unit device come from the same previous unit device or the previous unit device only provides processing materials for a certain subsequent unit device, then the proportion coefficient of the previous unit device is the same as that of the subsequent unit device; if the processing materials of a certain unit device come from two or more previous unit devices, then the proportion coefficient of the previous unit device is distributed according to the weight ratio of the processing materials provided for the subsequent unit device; if a certain unit device provides processing materials for two or more subsequent unit devices, then the proportion coefficient of the previous unit device is the sum of the proportion coefficients of the subsequent unit devices.

9. A calculation device for the carbon emission intensity in the production process of petrochemical products, which is used to implement the calculation method for the carbon emission intensity in the production process of petrochemical products described in any one of claims 1 to 8, characterized in that the calculation device includes: a data extraction unit, which is used to obtain the basic information and data in the petrochemical product production stage and extract the energy consumption data involved in the petrochemical product production process; a carbon emission factor calculation unit, which is used to calculate the carbon emission factors of each emission source according to the energy consumption data; a unit device proportion coefficient calculation unit, which is used to determine the proportion coefficients of each unit device according to the basic information and data in the petrochemical product production stage; a carbon emission coefficient calculation unit, which is used to calculate the carbon emission coefficients of each emission source and / or the carbon emission coefficients of each unit device according to the carbon emission factors of each emission source and the proportion coefficients of each unit device; a carbon emission intensity calculation unit, which is used to calculate the carbon emission intensity of each emission source and / or the carbon emission intensity of each unit device in the petrochemical product production stage according to the carbon emission coefficients of each emission source and / or the carbon emission coefficients of each unit device.

10. A memory, including a software program, and the software program is adapted to be executed by a processor to perform the steps of the calculation method described in any one of the previous claims 1-8.

Images