A method, device and storage device for calculating carbon emission coefficient of petrochemical device

Abstract

This invention provides a method, apparatus, and storage device for calculating the carbon emission coefficient of a petrochemical plant. The calculation method is used to calculate the carbon emission coefficient of a petrochemical plant for different products, including: S1 acquiring basic information and data of the petrochemical plant and extracting energy consumption data of the petrochemical plant during the production stage; S2 calculating the carbon emissions of the petrochemical plant based on the energy consumption data of the petrochemical plant during the production stage; S3 calculating the total carbon emission coefficient of the petrochemical plant; S4 calculating the contribution of the petrochemical plant to carbon emissions for different products; and S5 calculating the carbon emission coefficient of the petrochemical plant for different products. This invention uses the petrochemical plant as the calculation target, enabling the calculation of the carbon emission coefficient of the petrochemical plant for different products. Furthermore, this invention uses calculated values ​​instead of existing literature values ​​or empirical values, making the calculation results more accurate and avoiding errors caused by using literature values ​​or empirical values.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving and emission-reduction measurement, and in particular to a method, device and storage device for calculating the carbon emission coefficient of a petrochemical device. Background Art

[0002] The climate problem caused by the massive emission of greenhouse gases is becoming increasingly serious and has attracted widespread attention from countries around the world and the public. The development of a low-carbon economy has become the main trend of the world's industrial economic development. By quantitatively considering the carbon emissions in the production process of petrochemical plants, it can provide guidance and basis for enterprises to screen emission reduction technologies and reduce carbon emissions.

[0003] Chinese patent application CN 109948901 A discloses a "method and system for calculating the carbon footprint of household detergent products". Specifically, it includes calculating the carbon emissions of household detergent products during their production cycle, implementing product carbon footprint grading, and determining whether they are low-carbon. The invention aims to solve the problem of quantitatively calculating and rating the carbon emissions of household detergent products throughout their life cycle. It involves the carbon emission calculation problem of a specific product, but does not involve the carbon emission problem of a specific device in a complex process or complex device, and it is impossible to propose low-carbon production strategies and suggestions based on the carbon emission calculation results.

[0004] The petrochemical industry has special energy properties and is highly dependent on fossil fuels. It is one of the key industries for low-carbon development. In recent years, greenhouse gas emissions from the refining sector have been increasing. For refining companies, the production stage of petrochemical products is the only link they can control. The production process of petrochemical products involves complex processes and numerous petrochemical plants. Moreover, a refining company often involves the production process of multiple petrochemical products. At present, there is no method to calculate the carbon emission coefficient of a petrochemical plant based on the different petrochemical products it produces. Summary of the invention

[0005] In view of the defects in the prior art, the present invention aims to provide a method for calculating the carbon emission coefficient of a petrochemical device. Taking the petrochemical device as the calculation basis, the carbon emission coefficient of the petrochemical device for different products is calculated to solve the problem that the existing technology cannot effectively monitor the carbon emissions of petrochemical products with complex processes and numerous petrochemical devices, and avoid the omission of petrochemical devices during the calculation process. It can also optimize the production configuration and plan of petrochemical products from the perspective of the entire enterprise, so as to achieve the purpose of controlling the total carbon emissions of refining enterprises.

[0006] The present invention provides a method for calculating the carbon emission coefficient of a petrochemical device, which is used to calculate the carbon emission coefficient of a petrochemical device for different products, and comprises the following steps:

[0007] S1 obtains basic information and data of petrochemical plants and extracts energy consumption data of petrochemical plants in the production stage;

[0008] S2 calculates the carbon emissions of petrochemical plants based on the energy consumption data of petrochemical plants during the production phase;

[0009] S3 calculates the total carbon emission factor of the petrochemical plant;

[0010] S4 calculates the contribution of petrochemical plants to carbon emissions for different products;

[0011] S5 calculates the carbon emission coefficient of petrochemical plants for different products.

[0012] Furthermore, the petrochemical unit includes one or more of a normal and low pressure unit, a catalytic cracking unit, a coking unit, a gasoline and diesel hydrogenation unit, a residual oil hydrogenation unit, an S-ZORB unit and various oil tank farms.

[0013] Furthermore, the energy consumption data of the petrochemical plant includes consumption data of one or more energy or materials selected from the group consisting of fuel gas, electricity, steam, fresh water, circulating water, desalted water, deoxygenated water, nitrogen, compressed air, and the like.

[0014] Furthermore, the method of obtaining basic information and data of petrochemical equipment in S1 and extracting energy consumption data of petrochemical equipment in the production stage includes:

[0015] S11 determines the production process and background data of the petrochemical plant; including: selecting the petrochemical plant to be calculated, obtaining the production process and background data of the petrochemical plant, and obtaining the background data of the refining enterprise, including production overview, plant ownership, processing capacity, plant general plan, petrochemical plant principle flow chart, steam pipe network diagram, etc.;

[0016] S12 Draw a production flow chart of the petrochemical plant based on the production process and background data of the petrochemical plant;

[0017] S13 obtains energy consumption data related to petrochemical plants.

[0018] Further, the process of calculating the carbon emissions of the petrochemical plant according to the energy consumption data of the petrochemical plant in the production stage described in S2 includes the following steps:

[0019] S21 divides the consumed energy into four types according to emission sources based on the energy consumption data obtained in S1: fuel emission sources, electricity emission sources, steam emission sources and other emission sources;

[0020] S22 obtains the corresponding emission factors according to the different emission source types: fuel emission factor, electricity emission factor, steam emission factor and other emission factors;

[0021] S23 calculates the carbon emissions of petrochemical plants e1 based on the carbon emission factors of each emission source;

[0022] The calculation formula is:

[0023] e1=∑(q i ×E i )

[0024] In the formula, q i is the energy consumption of petrochemical equipment; E i is the carbon emission factor of each energy source.

[0025] Furthermore, the fuel emission factors described in S22 are known fixed values, namely: fuel oil, 3.2366; fuel gas, 2.6528; water-coal slurry, 1.78; coke, 2.8655; diesel, 3.288; anthracite, 1.9162, unit: tCO2 / t.

[0026] The electricity emission factor and steam emission factor described in S22 are obtained based on the calorific value emission factor of electricity or steam and the calorific value of electricity or steam, and the calculation formula is: E=a×Q.

[0027] Where E is the electricity or steam emission factor, where the electricity emission factor is E e , the steam emission factor is E s ; a is the calorific value emission factor of electricity or steam, where the calorific value emission factor of electricity is a e , the steam calorific value emission factor is a s ; Q is the calorific value of electricity or steam, where Q is a constant. e is the calorific value of electricity, Q e =3.6×1000MJ / MWh; Q s is the calorific value of steam, Q s =3.684×1000MJ / t.

[0028] The electricity calorific value emission factor a e And the steam calorific value emission factor a s It can be calculated by the fuel consumption during the self-generation process. The calculation equation is as follows:

[0029] ∑q f ×E f =a e ×q e ×Q e +a s ×q s ×Q s

[0030] In the formula, q f is the fuel consumption in the process of self-generation; E fis the emission factor of the fuel; a e is the electricity calorific value emission factor; q e is the self-generated electricity; Q e is the calorific value of electricity, Q e =3.6×1000MJ / MWh; a s is the steam calorific value emission factor; q s is the steam quantity; Q s is the calorific value of steam, Q s =3.684×1000MJ / t. If it is a boiler system, then a e / a s =2.5; if it is a turbine system, then a e / a s =2.

[0031] Chemical plants generally generate electricity on their own, but when self-generation cannot meet demand, they will also connect to the grid. When grid-connected electricity occurs, the electricity emission factor is calculated based on the weighted average of grid-connected electricity and self-generated electricity, that is, E e1 =n1×E1+n0×E0.

[0032] Among them, n1 is the proportion of self-generated electricity consumption in the total electricity consumption, n0 is the proportion of grid-connected electricity consumption in the total electricity consumption, E0 is the electricity emission factor of grid-connected electricity, E o Determined according to the following principles:

[0033] North China region, E o is 0.968; in the Northeast region, E o is 1.1082; in East China, E o is 0.8046; in Central China, E o is 0.9014; in the northwest region, E o is 0.9155; in the southern region, E o It is 0.8367.

[0034] The emission factor of other emission sources in S22 is E2, which is obtained based on the amount of energy consumed in the use of other emission sources, the emission factor of the energy consumed in the use of other emission sources and the amount of other emission sources. The calculation formula is as follows:

[0035] E2=(∑q j ×E j ) / P i ;

[0036] In the formula, q j The amount of energy consumed in the use of other emission sources; E j The emission factor of energy consumed in the use of other emission sources; P i The amount used for other emission sources.

[0037] S3 calculates the total carbon emission coefficient of each petrochemical unit as H1, which is obtained based on the carbon emission of the petrochemical unit and the total amount of raw materials processed by the petrochemical unit. The calculation formula is:

[0038]

[0039] Where e1 is the carbon emissions of the petrochemical plant; M is the total amount of raw materials processed by the petrochemical plant.

[0040] The calculation method of the contribution of S4 Sinopec units to carbon emissions for different products includes:

[0041] S41 draws a material balance diagram for a petrochemical plant based on products to obtain the quantity of products produced by the petrochemical plant;

[0042] S42 obtains the total production volume of similar products of the enterprise;

[0043] S43 The ratio of the product volume produced by the petrochemical plant to the total production volume of similar products of the enterprise is the contribution of the petrochemical plant to the carbon emissions of the product.

[0044] S5 The carbon emission coefficient H of the petrochemical plant for different products is calculated based on the total carbon emission coefficient of the petrochemical plant and the contribution of the petrochemical plant to the carbon emission of the petrochemical product. The calculation formula is:

[0045] H=∑(H1×n i )

[0046] Where H1 is the total carbon emission coefficient of the petrochemical plant, n i For this petrochemical product, the contribution of petrochemical facilities in carbon emissions.

[0047] Another aspect of the present invention is to provide a device for calculating the carbon emission coefficient of a petrochemical device, which is used to calculate the carbon emission coefficient of a petrochemical device for different products. The device comprises:

[0048] Data extraction unit, used to obtain basic information and data of the petrochemical plant production stage and extract energy consumption data of the petrochemical plant;

[0049] A carbon emission calculation unit is used to calculate the carbon emission of the petrochemical plant based on the energy consumption data of the petrochemical plant involved in the production stage;

[0050] The total carbon emission coefficient calculation unit is used to draw a material balance diagram based on the feed and output conditions in the production process of the petrochemical plant and calculate the total carbon emission coefficient of the petrochemical plant;

[0051] Contribution calculation unit, used to calculate the contribution of petrochemical plants to carbon emissions for different products;

[0052] The carbon emission coefficient calculation unit for different products is used to calculate the carbon emission coefficient of petrochemical plants for different products.

[0053] The data extraction and calculation process of the calculation device can refer to the above specific calculation method process.

[0054] The present invention also provides a memory, including a software program, wherein the software program is suitable for a processor to execute the steps of the aforementioned calculation method.

[0055] The method provided by the present invention calculates the carbon emission coefficients of different petrochemical products for petrochemical devices. Taking the petrochemical device as the accounting target, the carbon emission coefficients of the products in the production stage of petrochemical products with complex production processes and involving many petrochemical devices can be calculated, avoiding the omission of devices in the accounting process, realizing the effective monitoring of the carbon emissions of petrochemical products produced by refining enterprises, and providing support for enterprises to optimize the production configuration and plan of petrochemical products from a global perspective, so as to achieve the purpose of regulating the total carbon emissions of refining enterprises.

[0056] In addition, the present invention adopts the method of calculated values ​​to replace the existing literature values ​​or empirical values ​​in the process of calculating the carbon emissions of petrochemical equipment, so that the calculation results are more accurate and the errors caused by using literature values ​​or empirical values ​​are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a schematic flow chart of the method for calculating the carbon emission coefficient of a petrochemical plant used in the embodiments and comparative examples of the present invention;

[0058] Figure 2 It is a schematic diagram of the production process flow of a diesel hydrogenation device shown in an embodiment of the present invention;

[0059] Figure 3 It is a schematic diagram of the calculation device of the carbon emission coefficient of the petrochemical device of the present invention. DETAILED DESCRIPTION

[0060] In order to enable those skilled in the art to better understand the technical solution of the present invention, the solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0061] Example 1

[0062] This embodiment provides a method for calculating the carbon emission coefficient of a petrochemical device, which is used to calculate the carbon emission coefficient of a petrochemical device for different products, such as Figure 1 As shown, the calculation method includes the following steps:

[0063] S1 obtains basic information and data of petrochemical plants and extracts energy consumption data of petrochemical plants in the production stage;

[0064] S2 calculates the carbon emissions of petrochemical plants based on the energy consumption data of petrochemical plants during the production phase;

[0065] S3 calculates the total carbon emission factor of the petrochemical plant;

[0066] S4 calculates the contribution of petrochemical plants to carbon emissions for different products;

[0067] S5 calculates the carbon emission coefficient of petrochemical plants for different products.

[0068] The method for obtaining basic information and data of petrochemical equipment in S1 and extracting energy consumption data of petrochemical equipment in the production stage includes:

[0069] S11 determines the production process and background data of the petrochemical device; including: selecting the petrochemical device to be calculated, obtaining the production process and background data of the petrochemical device. In this embodiment, the diesel hydrogenation device of a certain refinery 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, plant general plan, petrochemical device principle flow chart, and steam pipe network diagram.

[0070] S12 draws a production flow chart of the petrochemical plant based on the production process and background data of the petrochemical plant. The production flow chart of the diesel hydrotreating plant is as follows: Figure 2 The diesel hydrotreating unit of the refinery produces three petrochemical products: gasoline, diesel and naphtha.

[0071] S13 obtains relevant energy consumption data of petrochemical units. Energy consumption data of diesel hydrotreating units are shown in Tables 1 to 7.

[0072] S2 calculates the carbon emissions of the petrochemical plant based on the energy consumption data of the petrochemical plant in the production stage. The carbon emissions calculation process of the petrochemical plant in S2 includes the following steps:

[0073] S21 divides the consumed energy into four types according to emission sources based on the energy consumption data obtained in S1: fuel emission sources, electricity emission sources, steam emission sources and other emission sources;

[0074] S22 obtains the corresponding emission factors according to the different emission source types: fuel emission factor, electricity emission factor, steam emission factor and other emission factors;

[0075] S23 calculates the carbon emissions of petrochemical plants e1 based on the carbon emission factors of each emission source;

[0076] The calculation formula is:

[0077] e1=∑(q i ×E i )

[0078] In the formula, q i is the energy consumption of petrochemical equipment; E i is the carbon emission factor of each energy source.

[0079] Furthermore, the fuel emission factors described in S22 are known fixed values, namely: fuel oil, 3.2366; fuel gas, 2.6528; water-coal slurry, 1.78; coke, 2.8655; diesel, 3.288; anthracite, 1.9162, unit: tCO2 / t.

[0080] The calculation formula for the electricity emission factor and the steam emission factor described in S22 is: E=a×Q.

[0081] Where E is the electricity or steam emission factor, where the electricity emission factor is E e , the steam emission factor is E s ; a is the calorific value emission factor of electricity or steam, where the calorific value emission factor of electricity is a e , the steam calorific value emission factor is a s ; Q is the calorific value of electricity or steam, where Q is a constant. e is the calorific value of electricity, Q e =3.6×1000MJ / MWh; Q s is the calorific value of steam, Q s =3.684×1000MJ / t.

[0082] The electricity calorific value emission factor a e And the steam calorific value emission factor a s It can be calculated by the fuel consumption during the self-generation process, and the calculation formula is as follows:

[0083] ∑q f ×E f =a e ×q e ×Q e +a s ×q s ×Q s

[0084] In the formula, q f is the fuel consumption in the process of self-generation; E f is the emission factor of the fuel; a e is the electricity calorific value emission factor; q e is the self-generated electricity; Q e is the calorific value of electricity, Q e =3.6×1000MJ / MWh; a s is the steam calorific value emission factor; q s is the steam quantity; Q s is the calorific value of steam, Q s=3.684×1000MJ / t. If it is a boiler system, then a e / a s =2.5; if it is a turbine system, then a e / a s =2.

[0085] Specifically, S21 divides the consumed energy into four types according to the emission source: fuel emission source, electricity emission source, steam emission source and other emission sources; through the analysis of the carbon emission source list of the petrochemical plant, the greenhouse gas emission sources in the production process of the petrochemical plant are fresh water, circulating water, desalted water, electricity, steam, nitrogen, compressed air and fuel gas. Among them, fuel gas is the fuel emission source; electricity is the electricity emission source; steam is the steam emission source; the rest are other emission sources including: fresh water, circulating water, desalted water, nitrogen and compressed air.

[0086] S22 obtains the corresponding emission factors according to the different types of emission sources: fuel emission factors, electricity emission factors, steam emission factors and other emission factors; calculates the carbon emission factors of each emission source:

[0087] As mentioned above, the fuel emission factors are known fixed values, namely: fuel oil, 3.2366; fuel gas, 2.6528; water-coal slurry, 1.78; coke, 2.8655; diesel, 3.288; anthracite, 1.9162, unit: tCO2 / t.

[0088] The first step is to calculate the electricity emission factor and steam emission factor. The refinery uses petroleum coke, fuel oil, fuel gas and coal as fuel for self-generated electricity and steam production, and all self-generated electricity is not connected to the grid. The data is shown in Table 1.

[0089] Table 1 Statistics of fuel consumption, self-generated electricity and steam

[0090]

[0091]

[0092] The calculation process is as follows:

[0093] First calculate the calorific value emission factor a of the electricity e and the calorific value emission factor a of steam s , the calculation formula is as follows:

[0094] ∑q f ×E f =a e ×q e ×Q e +a s ×q s ×Qs , and in this embodiment, a boiler system is used for power generation. e / a s =2.5. The statistics of fuel consumption, self-generated electricity and steam are shown in Table 1. The fuel emission factors are known fixed values, namely: coke, 2.8655; fuel oil, 3.2366; fuel gas, 2.6528; anthracite, 1.9162; thus, it can be inferred that:

[0095] a s =(∑q f ×E f ) / (2.5×q e ×Q e +q s ×Q s )

[0096] 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 tCO2 / MJ

[0097] a e =2.5a s =2.5×1.0659×10 -4 =2.6647×10 -4 tCO2 / MJ

[0098] 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 , the calculation formula is: E e =a e ×Q e , E s =a s ×Q s .

[0099] E e =a e ×Q e =2.6647×10 -4 ×3.6×1000=0.9593tCO2 / MWh

[0100] E s =a s ×Q s =1.0659×10 -4 ×3.684×1000=0.3927tCO2 / t.

[0101] The second step is to calculate other emission factors of other emission sources. Other emission sources include: fresh water, circulating water, desalted water, nitrogen, compressed air. The refinery uses pontoons and pumps to extract fresh water from a certain water area to supply the production of petrochemical products.

[0102] Calculate the emission factor for fresh water as follows:

[0103] The energy consumption report for extracting fresh water is listed in Table 2.

[0104] Table 2 Fresh water energy consumption report

[0105]

[0106] The fresh water emission factor is E 2w , the calculation formula is as follows:

[0107] E 2w =(∑q j ×E j ) / P i ;

[0108] In the formula, q j is the amount of energy consumed in the use of fresh water, here it is the power consumption (unit: MWh); E j is the emission factor of energy consumed in the use of fresh water, here it is the electricity emission factor (unit: tCO2 / MWh). From the calculation result of the first step, we know that the value is 0.9593tCO2 / MWh; P i is the amount used by other emission sources, here it is the amount of fresh water (unit t).

[0109] The fresh water emission factor is E 2w

[0110] E 2w =(4562.8+1153.7)MWh×0.9593tCO2 / MWh / 8816451t=0.0006tCO2 / t

[0111] Calculate emission factors for recycled water.

[0112] The refinery is equipped with a circulating water field to meet the use of circulating water required for production. The emission factor calculation process of circulating water is as follows: The energy consumption report of the circulating water field is listed in Table 3.

[0113] Table 3 Energy consumption report of circulating water field

[0114]

[0115] The circulating water emission factor is E 2c , the calculation formula is as follows:

[0116] E 2c =(∑q j ×E j ) / P i ;

[0117] In the formula, q j It is the consumption of circulating water in the process of use as listed in Table 3 (unit: t or MWh), which includes the consumption of fresh water, steam and electricity; E j is the emission factor of the substances consumed in the process of circulating water use (unit: tCO2 / t or tCO2 / MWh), which are the emission factors of fresh water, steam and electricity respectively. From the calculation results of the previous embodiment, it can be seen that the emission factor of fresh water is 0.0006tCO2 / t, the emission factor of steam is 0.3927tCO2 / t, and the emission factor of electricity is 0.9593tCO2 / MWh; P i is the amount used by other emission sources, which here is the amount of circulating water.

[0118] The circulating water emission factor is E 2c

[0119] E 2c =(3248961t×0.0006tCO2 / t+298t×0.3927tCO2 / t+45623.8MWh×0.9593tCO2 / MWh) / 229645163t=0.0002tCO2 / t.

[0120] Calculate the emission factor of nitrogen. The calculation process is as follows:

[0121] The nitrogen in the refinery is obtained from the nitrogen production unit. The energy consumption data of the nitrogen production unit are listed in Table 4.

[0122] Table 4 Energy consumption of nitrogen production device

[0123]

[0124] The nitrogen emission factor is E 2c , the calculation formula is as follows:

[0125] E 2N2 =(∑q j ×E j ) / P i ;

[0126] In the formula, q j The consumption in the process of obtaining and using nitrogen as listed in Table 4, including the consumption of circulating water, steam and electricity (unit: t or MWh); E jis the emission factor of the substances consumed in the process of obtaining and using nitrogen, which are the emission factors of circulating water, steam and electricity (unit: tCO2 / t or tCO2 / MWh). According to the calculation results of the previous embodiment, the emission factor of circulating water is 0.0002tCO2 / t, the emission factor of steam is 0.3927tCO2 / t, and the emission factor of electricity is 0.9593tCO2 / MWh; P i is the amount used by other emission sources, here it is the amount of nitrogen.

[0127] The nitrogen emission factor is E 2N2

[0128] E 2N2 =(864979t×0.0002tCO2 / t+6980t×0.3927tCO2 / t+5638MWh×0.9593tCO2 / MWh) / 124859

[0129] 37Nm 3 =0.0007tCO2 / Nm 3

[0130] Calculate the emission factor for desalinated water as follows:

[0131] The treatment of desalted water in the refinery is the responsibility of the chemical water section. The energy consumption data of the chemical water section are listed in Table 5.

[0132] Table 5 Energy consumption report of chemical water section

[0133]

[0134] The emission factor for desalinated water is E 2rs , the calculation formula is as follows:

[0135] E 2rs =(∑q j ×E j ) / P i ;

[0136] In the formula, q j The consumption of demineralized water in the process of obtaining and using it is listed in Table 5, including the consumption of fresh water, electricity and nitrogen (unit: t or MWh or Nm 3 );E j is the emission factor of substances consumed in the process of obtaining and using desalted water, here are the emission factors of fresh water, electricity and nitrogen (unit: tCO2 / t or tCO2 / MWh or tCO2 / Nm 3). According to the calculation results of the previous embodiment, the fresh water emission factor is 0.0006tCO2 / t, the electricity emission factor is 0.9593tCO2 / MWh, and the nitrogen emission factor is 0.0007tCO2 / Nm 3 ;P i is the amount used by other emission sources, which is the amount of desalted water here.

[0137] The desalinated water emission factor is E 2rs

[0138] E 2rs =(3945862t×0.0006tCO2 / t+4168.232MWh×0.9593tCO2 / MWh+5568491Nm 3 ×0.0007tCO2 / Nm 3 ) / 4695523t=0.0022tCO2 / t

[0139] Calculate the emission factor for compressed air as follows:

[0140] The 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 6.

[0141] Table 6 Energy consumption report of air compressor station

[0142]

[0143] The compressed air emission factor is E 2a , the calculation formula is as follows:

[0144] E 2a =(∑q j ×E j ) / P i ;

[0145] In the formula, q j The consumption in the process of compressed air acquisition and use as listed in Table 6, including the consumption of circulating water and electricity (unit: t or MWh); E j is the emission factor of the substances consumed in the process of compressed air acquisition and use, which are the circulating water and electricity emission factors (unit: tCO2 / t or tCO2 / MWh). From the calculation results of the previous embodiment, it can be seen that the circulating water emission factor is 0.0002tCO2 / t, and the electricity emission factor is 0.9593tCO2 / MWh; P i is the usage of other emission sources, which is the compressed air volume here.

[0146] The compressed wind emission factor E 2a for:

[0147] E 2a=(4591358t×0.0002tCO2 / t+49762.55MWh×0.9593tCO2 / MWh) / 251648651Nm 3

[0148] =0.0002tCO2 / N m 3 .

[0149] The diesel hydrotreating unit is used as an example to further illustrate the calculation process of carbon emissions from petrochemical units. Figure 2 shown.

[0150] Calculate the emissions of the diesel hydrotreating unit. The energy consumption data of the diesel hydrotreating unit is shown in Table 7. The calculation process is as follows:

[0151] Calculation formula:

[0152] e1=∑(q i ×E i )

[0153] In the formula, q i is the energy consumption of petrochemical plants; E i is the carbon emission factor of each energy source.

[0154] From the above method, it is known that the carbon emission factors of each energy source are: electricity, 0.9593tCO2 / MWh; fuel gas, 2.6528tCO2 / t; steam, 0.3927tCO2 / t; fresh water, 0.0006tCO2 / t; circulating water, 0.0002tCO2 / t; desalted water, 0.0022tCO2 / t; nitrogen, 0.0007tCO2 / Nm 3 ; Compressed air, 0.0002tCO2 / Nm 3 .

[0155] S23 calculates the carbon emissions of petrochemical plants e1 based on the carbon emission factors of each emission source;

[0156] Table 7 Energy consumption data of diesel hydrotreating unit

[0157]

[0158]

[0159] Substitute each parameter into the formula for calculation and obtain the carbon emissions of the diesel hydrotreating unit:

[0160] 2569×0.0006+6732243×0.0002+25393×0.0022+17123.53×0.9593+5086 6×0.3927+29866×2.6528+15123×0.0007+1851640×0.0002=117415tCO2.

[0161] During the production process, the enterprise measured the carbon emissions of the diesel hydrotreating unit in the actual production process. The measurement results showed that the carbon emissions during the production process of the diesel hydrotreating unit were 117,301 tCO2, and the actual measured value was basically consistent with the calculation result provided by the calculation method of the present invention.

[0162] S3 calculates the total carbon emission coefficient of the diesel hydrotreating unit as H1, and the calculation formula is:

[0163]

[0164] Where e1 is the carbon emissions of the petrochemical plant; M is the total amount of raw materials processed by the petrochemical plant.

[0165] The total amount of raw materials processed by the diesel hydrotreating unit M is 233283t; from the previous calculation results, it can be seen that the carbon emission e1 of the diesel hydrotreating unit is 117415tCO2. Substituting each parameter into the formula, the carbon emission coefficient of the diesel hydrotreating unit is obtained as follows:

[0166] 117415 / 233283=0.503tCO2 / toil.

[0167] S4 calculates the contribution of diesel hydrotreater to carbon emissions for different products, including:

[0168] S41 draws a material balance chart of the diesel hydrotreating unit based on the product as the main line, see Table 8, and obtains the amount of products produced by the diesel hydrotreating unit;

[0169] S42 obtains the total production volume of similar products of the enterprise;

[0170] S43 The ratio of the product volume produced by the diesel hydrotreating unit to the total output of similar products of the enterprise is the contribution of the petrochemical unit to the carbon emissions of the product.

[0171] Table 8 Material balance chart of diesel hydrotreating unit

[0172]

[0173]

[0174] From the material balance chart of the diesel hydrotreating unit, it can be seen that the mass of gasoline produced by the diesel hydrotreating unit is 81,650 tons, and from the production statistics provided by the enterprise, it can be seen that the total amount of gasoline produced is 102,063 tons. The contribution of the diesel hydrotreating unit to the carbon emissions of gasoline products is:

[0175] 81650 / 102063=0.8.

[0176] From the material balance chart of the diesel hydrotreating unit, it can be seen that the diesel mass produced by the diesel hydrotreating unit is 93,315 tons, and from the production statistics provided by the enterprise, it can be seen that the total amount of diesel produced is 311,050 tons. The contribution of the diesel hydrotreating unit to the carbon emissions of diesel products is:

[0177] 93315 / 311050×1=0.3

[0178] Here, the source of the product naphtha is only the diesel hydrotreating unit, so the contribution of the diesel hydrotreating unit to the carbon emissions of the naphtha product is: 1.

[0179] S5 calculates the carbon emission coefficient H of petrochemical plants for different products. The calculation formula is:

[0180] H=∑(H1×n i )

[0181] Where H1 is the total carbon emission coefficient of the petrochemical plant, n i For this petrochemical product, the contribution of petrochemical facilities in carbon emissions.

[0182] For the diesel hydrotreating unit to produce gasoline products, here, H1 is the total carbon emission coefficient of diesel hydrotreating, which is calculated by the first step to be 0.503tCO2 / t; for gasoline products, the contribution of the diesel hydrotreating unit to carbon emissions is n i The above calculation shows that it is 0.8. Substituting each parameter into the formula, the carbon emission coefficient for the diesel hydrotreating unit for gasoline products is calculated as follows:

[0183] 0.503×0.8=0.402tCO2 / t

[0184] For diesel products produced by diesel hydrotreating units, H1 is the total carbon emission coefficient of diesel hydrotreating, which is calculated as 0.503tCO2 / t in the first step. For diesel products, the contribution of the diesel hydrotreating unit to carbon emissions is n i The above calculation shows that it is 0.3. Substituting each parameter into the formula, the carbon emission coefficient of the diesel hydrotreating unit for diesel products is calculated:

[0185] 0.503×0.3=0.151tCO2 / t

[0186] For naphtha products produced by diesel hydrotreating units, H1 is the total carbon emission coefficient of diesel hydrotreating, which is calculated as 0.503tCO2 / t in the first step; for naphtha products, the contribution of the diesel hydrotreating unit to carbon emissions is n i The above calculation shows that it is 1. Substituting each parameter into the formula, the carbon emission coefficient for the naphtha product diesel hydrotreating unit is calculated:

[0187] 0.503×1=0.503tCO2 / t.

[0188] According to the above calculation results, for diesel hydrotreating units, the carbon emission coefficient of 0.151tCO2 / t when producing diesel products is much lower than the carbon emission coefficients of 0.402tCO2 / t for gasoline and 0.503tCO2 / t for naphtha. Therefore, considering the production of blending units from the overall perspective of refining enterprises, carbon emissions can be reduced by further increasing the production ratio of diesel products by diesel hydrotreating units and appropriately reducing the production ratio of naphtha and gasoline products.

[0189] Example 2

[0190] The embodiment of the present invention further provides a device for calculating the carbon emission coefficient of a petrochemical device, which is used to calculate the carbon emission coefficient of a petrochemical device for different products. The device includes:

[0191] Data extraction unit, used to obtain basic information and data of the petrochemical plant production stage and extract energy consumption data of the petrochemical plant;

[0192] A carbon emission calculation unit is used to calculate the carbon emission of the petrochemical plant based on the energy consumption data of the petrochemical plant involved in the production stage;

[0193] Total carbon emission coefficient calculation unit, used to calculate the total carbon emission coefficient of petrochemical equipment;

[0194] Contribution calculation unit, used to calculate the contribution of petrochemical plants to carbon emissions for different products;

[0195] The carbon emission coefficient calculation unit for different products is used to calculate the carbon emission coefficient of petrochemical plants for different products.

[0196] The data extraction and calculation process of the calculation device can refer to the above specific calculation method process.

[0197] The present invention also provides a memory, including a software program, wherein the software program is suitable for a processor to execute the steps of the aforementioned calculation method.

[0198] Since the calculation process and beneficial effects of the carbon emission coefficient of the petrochemical plant have been recorded and explained in the previous embodiments, they can be referenced to each other and will not be repeated here.

[0199] In an embodiment of the present invention, a memory is further provided, wherein the memory includes a software program, and the software program is suitable for being executed by a processor as follows: Figure 1 The steps of the calculation method.

[0200] The embodiments of the present invention can be implemented by means of a software program, that is, by writing a program for implementing Figure 1 The software program (and instruction set) corresponding to each step in the carbon emission calculation method is stored in a storage device, and the storage device is arranged in a computer device, so that the software program can be called by the processor of the computer device to achieve the purpose of the embodiment of the present invention.

Claims

1. A method for calculating the carbon emission coefficient of a petrochemical device, used to calculate the carbon emission coefficient of a petrochemical device for different products, characterized in that: The following steps are involved: S1 obtains basic information and data of petrochemical plants and extracts energy consumption data of petrochemical plants in the production stage; S2 calculates the carbon emissions of petrochemical plants based on the energy consumption data of petrochemical plants in the production stage, including the following steps: S21 divides the consumed energy into four types according to emission sources based on the energy consumption data obtained in S1: fuel emission sources, electricity emission sources, steam emission sources and other emission sources; S22 obtains the corresponding emission factors according to the different emission source types: fuel emission factor, electricity emission factor, steam emission factor and other emission factors; S23 calculates the carbon emissions of petrochemical plants e1 based on the carbon emission factors of each emission source; The calculation formula is: e1=∑(q i ×E i ) In the formula, q i is the energy consumption of petrochemical equipment; E i is the carbon emission factor of each energy source; The electricity emission factor and steam emission factor are obtained based on the calorific value emission factor of electricity or steam and the calorific value of electricity or steam, and the calculation formula is: E = a × Q; Where E is the electricity or steam emission factor, where the electricity emission factor is E e , the steam emission factor is E s ; a is the calorific value emission factor of electricity or steam, where the calorific value emission factor of electricity is a e , the steam calorific value emission factor is a s ; Q is the calorific value of electricity or steam, where Q is a constant; The electricity calorific value emission factor a e And the steam calorific value emission factor a s The calculation is based on the fuel consumption during the self-generation process. The calculation equation is as follows: ∑q f ×E f =a e ×q e ×Q e +a s ×q s ×Q s In the formula, q f is the fuel consumption in the process of self-generation; E f is the emission factor of the fuel; a e is the electricity calorific value emission factor; q e is the self-generated electricity; Q e is the calorific value of electricity, Q e =3.6×1000MJ / MWh; a s is the steam calorific value emission factor; q s is the steam quantity; Q s is the calorific value of steam, Q s =3.684×1000MJ / t; if it is a boiler system, then a e / a s =2.5; if it is a turbine system, then a e / a s =2; The emission factor of other emission sources is E2, which is obtained based on the amount of energy consumed during the use of other emission sources, the emission factor of the energy consumed during the use of other emission sources and the amount of other emission sources. The calculation formula is as follows: E2=(∑q j ×E j ) / P i ; In the formula, q j The amount of energy consumed in the use of other emission sources; E j The emission factor of energy consumed in the use of other emission sources; P i Amount used for other emission sources; S3 calculates the total carbon emission coefficient of the petrochemical plant; the total carbon emission coefficient is H1, which is obtained based on the carbon emissions of the petrochemical plant and the total amount of raw materials processed for the petrochemical plant, and the calculation formula is: Where, e1 is the carbon emission of the petrochemical plant; M is the total amount of raw materials processed by the petrochemical plant; S4 calculates the contribution of petrochemical plants to carbon emissions for different products, including: S41 draws a material balance diagram for a petrochemical plant based on products to obtain the quantity of products produced by the petrochemical plant; S42 obtains the total production volume of similar products of the enterprise; S43 The ratio of the product volume produced by the petrochemical unit to the total volume of similar products produced by the enterprise is the contribution of the petrochemical unit to carbon emissions for the product; S5 calculates the carbon emission coefficient H of the petrochemical plant for different products; including: based on the total carbon emission coefficient of the petrochemical plant and the contribution of the petrochemical plant to carbon emissions for the product, the calculation formula is: H=∑(H1×n k ) Where H1 is the total carbon emission coefficient of the petrochemical plant, n k For this product, the contribution of petrochemical plants in carbon emissions.

2. The calculation method according to claim 1, characterized in that: The petrochemical unit includes one or more of a atmospheric and vacuum unit, a catalytic cracking unit, a coking unit, a gasoline and diesel hydrogenation unit, a residual oil hydrogenation unit, an S-ZORB unit and an oil tank area.

3. The calculation method according to claim 1, characterized in that: The energy consumption data of the petrochemical plant includes consumption data of one or more energy or substances of fuel gas, electricity, steam, fresh water, circulating water, desalted water, deoxygenated water, nitrogen, and compressed air.

4. The calculation method according to claim 1, characterized in that: The method for obtaining basic information and data of petrochemical equipment in S1 and extracting energy consumption data of petrochemical equipment in the production stage includes: S11 Determine the production process and background data of the petrochemical plant; S12 Draw a production flow chart of the petrochemical plant based on the production process and background data of the petrochemical plant; S13 obtains energy consumption data related to petrochemical plants.

5. A device for calculating the carbon emission coefficient of a petrochemical device, used for calculating the carbon emission coefficient of a petrochemical device for different products, the device comprising: Data extraction unit, used to obtain basic information and data of the petrochemical plant production stage and extract energy consumption data of the petrochemical plant; The carbon emission calculation unit is used to calculate the carbon emission of the petrochemical device according to the energy consumption data of the petrochemical device involved in the production stage, and includes the following steps: S21 classifies the consumed energy into four types according to emission sources according to the energy consumption data acquired by the data extraction unit: fuel emission sources, electricity emission sources, steam emission sources, and other emission sources; S22 obtains the corresponding emission factors according to the different emission source types: fuel emission factor, electricity emission factor, steam emission factor and other emission factors; S23 calculates the carbon emissions of petrochemical plants e1 based on the carbon emission factors of each emission source; The calculation formula is: e1=∑(q i ×E i ) In the formula, q i is the energy consumption of petrochemical equipment; E i is the carbon emission factor of each energy source; The electricity emission factor and steam emission factor are obtained based on the calorific value emission factor of electricity or steam and the calorific value of electricity or steam, and the calculation formula is: E = a × Q; Where E is the electricity or steam emission factor, where the electricity emission factor is E e , the steam emission factor is E s ; a is the calorific value emission factor of electricity or steam, where the calorific value emission factor of electricity is a e , the steam calorific value emission factor is a s ; Q is the calorific value of electricity or steam, where Q is a constant; The electricity calorific value emission factor a e And the steam calorific value emission factor a s The calculation is based on the fuel consumption during the self-generation process. The calculation equation is as follows: ∑q f ×E f =a e ×q e ×Q e +a s ×q s ×Q s In the formula, q f is the fuel consumption in the process of self-generation; E f is the emission factor of the fuel; a e is the electricity calorific value emission factor; q e is the self-generated electricity; Q e is the calorific value of electricity, Q e =3.6×1000MJ / MWh; a s is the steam calorific value emission factor; q s is the steam quantity; Q s is the calorific value of steam, Q s =3.684×1000MJ / t; if it is a boiler system, then a e / a s =2.5; if it is a turbine system, then a e / a s =2; The emission factor of other emission sources is E2, which is obtained based on the amount of energy consumed during the use of other emission sources, the emission factor of the energy consumed during the use of other emission sources and the amount of other emission sources. The calculation formula is as follows: E2=(∑q j ×E j ) / P i ; In the formula, q j The amount of energy consumed in the use of other emission sources; E j The emission factor of energy consumed in the use of other emission sources; P i Amount used for other emission sources; The total carbon emission coefficient calculation unit is used to draw a material balance diagram according to the feed and output conditions in the production process of the petrochemical device and calculate the total carbon emission coefficient of the petrochemical device; the total carbon emission coefficient is H1, which is obtained based on the carbon emissions of the petrochemical device and the total amount of raw materials processed for the petrochemical device, and the calculation formula is: In the formula, e1 is the carbon emission of the petrochemical plant; M is the total amount of raw materials processed by the petrochemical plant; the contribution calculation unit is used to calculate the contribution of the petrochemical plant to carbon emissions for different products, including: Draw the material balance diagram of the petrochemical plant with products as the main line to obtain the amount of products produced by the petrochemical plant; Obtain the total production volume of similar products of the enterprise; The ratio of the product volume produced by the petrochemical unit to the total production volume of similar products of the enterprise is the contribution of the petrochemical unit to the carbon emissions of the product; The carbon emission coefficient calculation unit for different products is used to calculate the carbon emission coefficient H of petrochemical plants for different products, including: Based on the total carbon emission coefficient of the petrochemical plant and the contribution of the petrochemical plant to carbon emissions for this product, the calculation formula is: H=∑(H1×n k ) Where H1 is the total carbon emission coefficient of the petrochemical plant, n k For this product, the contribution of petrochemical plants in carbon emissions.

6. A memory comprising a software program, wherein the software program is suitable for a processor to execute the steps of the computing method as described in any one of claims 1 to 4.

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