Data collection and processing method for cement product carbon footprint based on whole life cycle

Abstract

The present application relates to carbon footprint analysis technical field, especially to a kind of data collection and processing method of cement product carbon footprint based on whole life cycle, comprising the following steps: if the initial cement product production stage is ore mining and processing stage, then start from ore mining and processing stage, and output the life cycle inventory or secondary data of this stage, if the initial cement product production stage is clinker burning stage, then start from clinker burning stage, and output the life cycle inventory of this stage, if the initial cement product initial production stage is grinding stage, then from grinding stage, and output the life cycle inventory of this stage.The present application is clear about the collection requirement and processing method of each stage data of cement product, the life cycle inventory of each stage of cement product is calculated, and the data collection efficiency of cement product carbon footprint, data processing accuracy and integrity can be improved.

Description

Technical Field

[0001] This invention relates to the field of carbon footprint analysis technology, and in particular to a method for collecting and processing data on the carbon footprint of cement products based on their entire life cycle. Background Technology

[0002] The global climate system is currently undergoing significant changes. Carbon dioxide is considered the largest anthropogenic greenhouse gas, and its emissions can be largely controlled by humans. Therefore, carbon dioxide has become the most concerning greenhouse gas, and its emissions are commonly referred to as carbon dioxide emissions, or simply carbon emissions. Currently, the total carbon dioxide emissions from the entire construction process are approximately 5 billion tons, accounting for 47% of the national total carbon emissions. Of this, the carbon dioxide emissions from the building materials production stage of the entire housing construction process are approximately 1.7 billion tons, accounting for 16% of the national total and 42% of the total carbon emissions from the entire process. Cement is the most widely used material in construction and infrastructure, and it emits carbon dioxide throughout its entire life cycle. Therefore, accurate, complete, and efficient collection and processing of data from the cement production stage is fundamental to calculating the carbon footprint of cement products. Currently, the collection of carbon footprint data for cement products directly obtains the output of cement products and the raw materials and energy required for cement production within a certain period, without distinguishing between cement product types and important processes in the cement production process. This collection and processing method is rather vague, leading to data gaps and inaccurate calculations. Summary of the Invention

[0003] The technical problem to be solved by this invention is: in order to address the relatively vague technical issues in the existing methods for collecting and processing the carbon footprint of cement products, this invention provides a method for collecting and processing the carbon footprint of cement products based on the entire life cycle. By improving the method for collecting and processing the carbon footprint of cement products and using decision trees to guide the collection and processing of carbon footprint data of cement products, the efficiency of collecting carbon footprint data, the accuracy and completeness of data processing can be improved.

[0004] The technical solution adopted by this invention to solve its technical problem is: a method for data collection and processing of the carbon footprint of cement products based on the entire life cycle, comprising the following steps:

[0005] S1. Divide the life cycle of cement products into the ore mining and processing stage, clinker calcination stage, grinding stage, and packaging and shipping stage.

[0006] S2. Obtain the initial cement production stage of the cement product manufacturing enterprise. If the initial cement production stage is the ore mining and processing stage, then start from step S3. If the initial cement production stage is the clinker calcination stage, then start from step S4. If the initial cement production stage is the grinding stage, then start from step S5.

[0007] S3. Obtain the decision tree for data collection and processing in the ore mining and processing stages of cement products, and output the lifecycle list or secondary data of the ore mining and processing stages.

[0008] S4. Obtain the decision tree for data collection and processing of cement clinker calcination stage, and output the life cycle list of clinker calcination stage;

[0009] S5. Obtain the decision tree for data collection and processing in the cement product grinding stage, and output the lifecycle list of the grinding stage;

[0010] S6. Obtain the decision tree for data collection and processing during the packaging and shipping stages of cement products, and output a lifecycle list or secondary data for the packaging and shipping stages.

[0011] Therefore, in the process of collecting and processing carbon footprint data of cement products, data collection and processing should be carried out according to the actual production situation of cement production enterprises. The collection requirements and processing methods for data at each stage of cement products should be clarified, and the life cycle inventory of cement products at each stage should be calculated. This can improve the efficiency of data collection, the accuracy and completeness of data processing of carbon footprint of cement products. At the same time, data collection and processing based on decision-making can compare the carbon footprint results of different cement product production enterprises and perform corresponding analysis and processing on the carbon emission data of different cement product production enterprises.

[0012] Further, S2 includes the following steps:

[0013] S2-1. Obtain information on the clinker production lines, owned mines, and ore purchases of cement production enterprises;

[0014] S2-2. If the cement product manufacturer has a clinker production line and its own mine, then proceed to step S3.

[0015] S2-3. If a cement product manufacturer has a clinker production line but no mine of its own, and the purchased ore does not need to be processed, but the purchased ore is a key category, then obtain the life cycle inventory or carbon footprint data of the purchased ore, and at the same time obtain the transportation method and mileage of the purchased ore, and then proceed to step S4.

[0016] S2-4. If a cement product manufacturer has a clinker production line but no mine of its own, and the purchased ore does not need to be processed, but the purchased ore is not a critical category, then the secondary data of the ore shall be used, and the transportation method and mileage of the purchased ore shall be obtained at the same time, and then step S4 shall be executed.

[0017] S2-5. If a cement product manufacturing enterprise has a clinker production line but no mine of its own, and the purchased ore needs to be processed, then collect the data of the purchased ore processing process, calculate the life cycle list of the purchased ore processing process, and if the purchased ore is a critical category, then obtain the life cycle list or carbon footprint data of the purchased ore, and at the same time obtain the transportation method and mileage of the purchased ore, and then execute step S4.

[0018] S2-6. If a cement product manufacturing enterprise has a clinker production line but no mine of its own, and the purchased ore needs to be processed, then collect the processing process data of the purchased ore, calculate the life cycle list of the processing process of the purchased ore, and if the purchased ore is not a critical category, then use the secondary data of the ore, and at the same time obtain the transportation method and mileage of the purchased ore, and then execute step S4.

[0019] S2-7. If a cement product manufacturer does not have a clinker production line, but purchasing clinker is a key category, then obtain the life cycle inventory or carbon footprint data of the purchased clinker, and at the same time obtain the transportation method and mileage of the purchased clinker, and then proceed to step S5.

[0020] S2-8. If a cement product manufacturer does not have a clinker production line, but the purchased clinker is not a critical category, then the secondary data for that clinker should be used, and the transportation method and mileage of the purchased clinker should be obtained simultaneously before proceeding to step S5. Therefore, in the process of collecting and processing cement product carbon footprint data, the initial stage of cement product data collection and processing is clarified based on the production process composition of the cement product manufacturer.

[0021] Further, step S3 includes the following steps:

[0022] S3-1. Obtain data on ore mining and ore processing from cement production enterprises;

[0023] Ore mining process:

[0024] S3-2. If the cement product manufacturing enterprise has detailed data for the ore mining process, then collect the data of the ore mining process, calculate the life cycle list of ore mining, and then execute step S3-5, step S3-6, or step S3-7.

[0025] S3-3. If the cement product manufacturing enterprise does not have detailed data for the ore mining process, and the ore mining process is a critical category, then collect the data on ore mining and return to step S3-2.

[0026] S3-4. If the cement product manufacturer does not have detailed data for the ore mining process, and the ore mining process is not a critical category, then use the secondary data of the ore mining process, and then execute step S3-5, step S3-6, or step S3-7.

[0027] Ore processing:

[0028] S3-5. If the cement product manufacturing enterprise has detailed data for the ore processing process, then collect the data of the ore processing process, calculate the life cycle list of the processed ore, and then execute step S4.

[0029] S3-6. If the cement production enterprise does not have detailed data for the ore processing process, and the ore processing process is a critical category, then collect the data on the processed ore and return to step S3-5.

[0030] S3-7. If the cement product manufacturer does not have detailed data for the ore processing process, and the ore processing process is not a critical category, then secondary data from the ore processing process should be used, and step S4 should be executed. Therefore, in the process of collecting and processing carbon footprint data for cement products, data collection and processing are carried out based on the cement manufacturer's free mines, clarifying the data collection requirements and processing methods for the ore mining and processing stages of cement products, and calculating the lifecycle inventory of the ore mining and processing stages of cement products.

[0031] Further, step S4 includes the following steps:

[0032] S4-1. Obtain data on fuel preparation, raw meal preparation, clinker calcination, waste heat power generation, and clinker shipment from cement production enterprises;

[0033] Fuel preparation process:

[0034] S4-2. If the cement product manufacturing enterprise has detailed data for the fuel preparation process, then collect the fuel preparation data, calculate the actual raw material consumption, transportation mileage and power consumption data of the fuel used for the clinker, and output result 1, and then execute step S4-8 or step S4-9.

[0035] S4-3. If the cement product manufacturer does not have detailed data for the fuel preparation process, and the fuel preparation process is a critical category, then collect the fuel preparation data and return to step S4-2.

[0036] S4-4. If the cement product manufacturer does not have detailed data for the fuel preparation process, and the fuel preparation process is not a critical category, then collect the necessary data for fuel preparation, output result 1, and then execute step S4-8 or step S4-9.

[0037] Raw material preparation process:

[0038] S4-5. If the cement product manufacturer has detailed data for the raw meal preparation process, collect the raw meal preparation data, calculate the actual raw material consumption, transportation mileage and power consumption data of the raw meal used for the clinker, and output result 2, then execute step S4-8 or step S4-9.

[0039] S4-6. If the cement product manufacturer does not have detailed data for the raw meal preparation process, and the raw meal preparation process is a critical category, then collect the raw meal preparation data and return to step S4-6.

[0040] S4-7. If the cement product manufacturer does not have detailed data for the raw meal preparation process, and the raw meal preparation process is not a critical category, then collect the necessary data for raw meal preparation, output result 2, and then execute step S4-8 or step S4-9.

[0041] Clinker firing process:

[0042] S4-8. If the cement product manufacturer has detailed data for the clinker calcination process, collect the clinker calcination data, calculate the life cycle list of the clinker calcination process, and then execute step S4-10 or step S4-11.

[0043] S4-9. If the cement product manufacturer does not have detailed data for the clinker calcination process, then collect the clinker calcination data and return to step S4-8.

[0044] Waste heat power generation process:

[0045] S4-10. If the cement product manufacturing enterprise has a waste heat power generation unit, collect the data on the grid-connected power generation of the waste heat power generation unit, calculate the grid power consumption of each process, update the grid power consumption to the life cycle list of each process, and then execute step S4-12 or step S4-13 or step S4-14 or step S4-15 or step S4-16.

[0046] S4-11. If the cement product manufacturing enterprise does not have a waste heat power generation unit, then proceed to step S4-12, step S4-13, step S4-14, step S4-15, or step S4-16.

[0047] Clinker shipping process:

[0048] S4-12. If a cement product manufacturer does not produce cement but has detailed data for the clinker shipping process, then collect the clinker shipping data, calculate the clinker shipping lifecycle list, and end the process.

[0049] S4-13. If the cement product manufacturer does not produce cement and has no detailed data for the clinker shipping process, but the clinker shipping process is a critical category, then collect the clinker shipping data and return to step S4-12.

[0050] S4-14. If a cement product manufacturer does not produce cement and there is no detailed data for the clinker shipment process, but clinker shipment is not a critical category, then the secondary data for the clinker shipment process shall be used and the process shall end.

[0051] S4-15. If a cement product manufacturer produces cement and sells some clinker externally, then return to step S1-12, S4-13, or S4-14, do not execute the end step, and execute step S5.

[0052] S4-16. If a cement product manufacturer produces cement but does not sell some of the clinker, then proceed to step S5. Therefore, in step S4-4, since the fuel preparation process is part of the entire clinker calcination process and shares equipment with it, involving numerous allocation issues and being difficult to operate in practice, only accurate data needs to be collected; it cannot be completely separated from the clinker calcination process. Similarly, in step S4-7, since the raw material preparation process is part of the entire clinker calcination process and shares equipment with it, involving numerous allocation issues and being difficult to operate in practice, only accurate data needs to be collected; it cannot be completely separated from the clinker calcination process. In step S4-12, since cement product manufacturers do not produce cement, steps S5 and S6 are unnecessary. In step S4-14, since cement product manufacturers do not produce cement, steps S5 and S6 are unnecessary. During the collection and processing of cement product carbon footprint data, data collection and processing are conducted according to the calcination process of cement production enterprises. The collection requirements and processing methods for extreme data on cement product clinker calcination are clarified, and the lifecycle inventory of the cement product clinker calcination stage is calculated.

[0053] Further, step S5 includes the following steps:

[0054] S5-1. Obtain data on various types of cement from cement production enterprises;

[0055] S5-2. If cement product manufacturers can obtain detailed data on various types of cement, they can collect grinding data for various types of cement, calculate the life cycle list of cement grinding, and then proceed to step S6.

[0056] S5-3. If cement product manufacturers cannot obtain detailed data on various types of cement, and these types of cement are key categories, then collect grinding data for various types of cement and return to step S5-2.

[0057] S5-4. If cement manufacturers cannot obtain detailed data on various types of cement, and these types of cement are not critical categories, then collect cement grinding data, calculate the lifecycle inventory of cement grinding, and proceed to step S6. Therefore, in the process of collecting and processing cement product carbon footprint data, data collection and processing are carried out according to the grinding process of cement manufacturers, clarifying the collection requirements and processing methods for cement product grinding stage data, and calculating the lifecycle inventory of cement product grinding stages.

[0058] Further, step S6 includes the following steps:

[0059] S6-1. Obtain energy consumption data for cement packaging and shipping from cement production enterprises;

[0060] S6-2. If the energy consumption data for cement packaging and shipping is included in the grinding stage, and detailed process data for cement packaging and shipping cannot be extracted, then calculate the cement lifecycle inventory including the packaging and shipping stages, and end the process.

[0061] S6-3. If the energy consumption data for cement packaging and shipping is included in the grinding stage, but detailed process data for cement packaging and shipping can be extracted, then collect the cement packaging and shipping data, calculate the life cycle inventory of cement packaging and shipping, and end the process.

[0062] S6-4. If the energy consumption data for cement packaging and shipping is not included in the grinding stage, but there is detailed data for the packaging and shipping stage, then collect the cement packaging and shipping data, calculate the life cycle inventory of cement packaging and shipping, and end the process.

[0063] S6-5. If the energy consumption data for cement packaging and shipping is not included in the grinding stage, and there is no detailed data for the packaging and shipping process, and the packaging and shipping process is a critical category, then collect the data for cement packaging and shipping and return to step S6-4.

[0064] S6-6. If energy consumption data for cement packaging and shipping is not included in the grinding stage, and there is no detailed data for the packaging and shipping process, and the packaging and shipping process is not a critical category, then secondary data for the cement packaging and shipping process should be used, and the process should end. Therefore, in the process of collecting and processing carbon footprint data for cement products, data collection and processing are carried out based on the packaging and shipping processes of cement product enterprises. The collection requirements and processing methods for data in the cement product packaging and shipping stages are clarified, and a lifecycle inventory of the cement product packaging and shipping stages is calculated.

[0065] Furthermore, in steps S3, S4, S5, and S6, the data calculation for the lifecycle inventory first requires determining the time range T and dividing it into time units t. Then, based on the divided time units, system boundaries, and data collection requirements, all data is organized into n parts and calculated.

[0066] The calculation process involves the following two scenarios:

[0067] Scenario 1:

[0068] The collected data is complete, and the consumption α of raw materials and energy for each data set is calculated based on the functional or declared units of each process. i Then calculate the geometric mean A of multiple data sets. g and geometric standard deviation A gsd Or the arithmetic mean A m and arithmetic standard deviation A sd The calculation formula is as follows:

[0069] The unit product input α and consumption α in the i-th data set i The calculation formula is:

[0070]

[0071] Input the geometric mean A of α g The calculation formula is:

[0072]

[0073] Input the geometric standard deviation A of α gsd The calculation formula is:

[0074]

[0075] Input the arithmetic mean A of α m The calculation formula is:

[0076]

[0077] The arithmetic standard deviation A of input α sd The calculation formula is:

[0078]

[0079] Where: α i The unit, M α，i unit, A g unit, A m The unit and A sd The units of M are all related to the properties of α. α，i M represents the consumption of input α in the i-th data set. pro，iA represents the output of the product in the i-th data set, in kg. gsd The unit is dimensionless;

[0080] Scenario 2:

[0081] The collected data is incomplete. Calculate the consumption of raw materials and energy based on the functional or declared units of each process, and the unit product input α consumption α within the time range T. input The calculation formula is:

[0082]

[0083] Where: n = T / t, α input The unit and M a，total The units of M are all related to the properties of α. a，total M represents the total consumption of input α within the time range T. pro，total This represents the total output of products within a time frame T, expressed in kg. Therefore, in the process of collecting and processing the carbon footprint of cement products, a method for calculating the life cycle inventory data of cement products is provided. This method is applicable to calculating the consumption of raw materials and energy for each process within a functional unit or life unit, obtaining accurate initial data that includes dispersion, and improving the accuracy of life cycle assessment results.

[0084] Furthermore, in step S4, the actual consumption β input during clinker production in the i-th data set of the fuel preparation process is β. i The calculation formula is:

[0085]

[0086] Where: β i The unit and M β，i The units of M are all related to the properties of β. β，i M represents the consumption of input β in the i-th data set. fuel，i M represents the fuel production in the i-th data set, in kg. cons，i This represents the actual fuel consumption during clinker production in the i-th data set, expressed in kg.

[0087] In step S4, the actual consumption of input γ during the clinker production process in the i-th data set of the raw material preparation process is γ. i The calculation formula is:

[0088]

[0089] Wherein: γ i Units, N γ，i The units are all related to the properties of γ, N γ，iN represents the consumption of input γ in the i-th data set. raw，i N represents the yield of raw materials in the i-th data set, in kg. cons，i This represents the actual consumption of raw materials during clinker production in the i-th data set, expressed in kg. Therefore, in the process of collecting and processing carbon footprint data for cement products, this paper provides a method for calculating the actual consumption of raw materials and energy during fuel preparation and raw material preparation, avoiding data errors and inaccuracies caused by directly using raw material consumption data.

[0090] Furthermore, in step S4, the calculation of carbon dioxide emissions during clinker calcination is divided into two parts:

[0091] Part One:

[0092] The calculation formula for CO2 emissions from the combustion of non-biochar in fossil fuels and alternative fuels during clinker calcination is as follows:

[0093] CO2 emissions from the combustion of the jth type of fossil fuel during clinker calcination (CE) fossil，j The calculation formula is:

[0094]

[0095] Non-biocarbon emissions (CE) from the jth alternative fuel during clinker calcination alter，j The calculation formula is:

[0096] CE alter，j =M alter，j *Qnet alter，ar，j *EF j *ε j , (j = 1, 2, ..., n);

[0097] Emissions from fuel combustion during clinker calcination (CE) fuel，emission The calculation formula is:

[0098] CE fuel，emission =CE fossil，j +CE alter，j ;

[0099] Among them: CE fossil，j Units, CE alter，j Units and CE fuel，emission The units are all kgCO2e, M fossil，j Qnet represents the consumption of the j-th fossil fuel during clinker combustion, expressed in tons (t). fossil，ar，j This represents the received minimum calorific value of the j-th fossil fuel during clinker combustion, expressed in GJ / t, CC. jThis represents the carbon content per unit calorific value of the j-th fossil fuel during clinker combustion, expressed in kgC / GJ, OF. j The carbon oxidation rate of the j-th fossil fuel during clinker combustion is expressed as a percentage (%). 44 / 12 represents the conversion factor from C to CO2, M. alter，j Qnet represents the consumption of the j-th alternative fuel during clinker calcination, in tons (t). alter，ar，j EF represents the received basic calorific value of the j-th alternative fuel during clinker combustion, expressed in GJ / t. j ε represents the CO2 emission factor of the j-th alternative fuel during clinker combustion, expressed in kgCO2 / GJ. j This indicates the non-biomass carbon content of the j-th alternative fuel during clinker calcination, expressed in %;

[0100] Part Two:

[0101] The calculation formula for CO2 generated during the clinker calcination process from the decomposition of raw material carbonates and the calcination of non-fuel carbon is as follows:

[0102] Clinker calcination process raw material carbonate decomposition emissions (CE) process，1 The calculation formula is:

[0103]

[0104] Non-fuel carbon emissions during clinker calcination (CE) process，2 The calculation formula is:

[0105]

[0106] Total CE emissions from raw material carbonate decomposition and non-fuel carbon calcination during clinker calcination process The calculation formula is:

[0107] CE process =CE process，1 +CE process，2 ;

[0108] Among them, CE process，1 Units, CE process，2 Units and CE process The units for all values ​​are kgCO2e and P. ck P represents the clinker yield during the clinker calcination process, expressed in kg. ckd This indicates the weight of dust from the kiln head exhaust stack during clinker calcination, expressed in kg (P). bpd This indicates the weight of dust emitted during the kiln bypass ventilation in the clinker firing process, in kg. cao This indicates the calcium oxide content in clinker, expressed as a percentage (CK). cao，nuThis indicates the content of calcium oxide in clinker that is not derived from carbonate decomposition, expressed in %. CK mgo This indicates the magnesium oxide content in the clinker, expressed as a percentage (CK). mgo，nu This indicates the content of magnesium oxide in the clinker that is not derived from carbonate decomposition. 44 / 56 represents the conversion factor from CaO to CO2, 44 / 40 represents the conversion factor from MgO to CO2, and RA represents the amount of raw meal consumed during clinker calcination, in kg. C This indicates the non-fuel carbon content in the raw materials, expressed as a percentage. Therefore, in the process of collecting and processing carbon footprint data for cement products, a method for calculating carbon dioxide emissions from the decomposition of fossil fuels and carbonates in the clinker calcination process is provided. This makes the calculation of the process with the highest carbon dioxide emissions more scientific, reasonable, and comparable.

[0109] Furthermore, in step S4, the calculation of the power grid consumption of cement production enterprises with waste heat power generation units includes the following steps:

[0110] Step 1:

[0111] Clearly define the processes by which waste heat power generation is used in production, and collect relevant statistical data on electricity consumption in these processes;

[0112] Step Two:

[0113] The electricity consumption of the power grid in the m-th production process is E grid，m The calculation formula is:

[0114]

[0115] Step 3:

[0116] Step 2E grid，m The computational structure is returned to the production process in step one;

[0117] Among them: E grid，m The unit is kWh, E st，m This represents the electricity statistics for the m-th production process, in kWh (E). heat This represents the electricity generated by waste heat power generation connected to the grid, in kWh (E). st，tatal This indicates the total electricity consumption of production processes using waste heat power, measured in kWh. Therefore, in the process of collecting and processing carbon footprint data for cement products, this method provides a calculation method for the grid electricity consumption of cement production enterprises using waste heat power generation units, avoiding an overestimation of carbon dioxide emissions from the use of waste heat power.

[0118] Compared with the prior art, the beneficial effects of the present invention are:

[0119] In the process of collecting and processing carbon footprint data of cement products, data collection and processing are carried out based on the actual production situation of cement production enterprises. The collection requirements and processing methods for data at each stage of cement products are clarified, and the life cycle inventory of cement products at each stage is calculated. This can improve the efficiency of data collection, accuracy and completeness of data processing of cement product carbon footprint. At the same time, data collection and processing based on decision-making can compare the carbon footprint results of different cement product production enterprises and perform corresponding analysis and processing on the carbon emission data of different cement product production enterprises. Attached Figure Description

[0120] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0121] Figure 1 This is a flowchart of the data collection and processing method for the carbon footprint of cement products based on the entire life cycle, according to the present invention.

[0122] Figure 2 This is a flowchart of step S2 of the present invention;

[0123] Figure 3 This is a flowchart of step S3 of the present invention;

[0124] Figure 4 This is a flowchart of step S4 of the present invention;

[0125] Figure 5 This is a flowchart of step S5 of the present invention;

[0126] Figure 6 This is a flowchart of step S6 of the present invention. Detailed Implementation

[0127] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0128] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0129] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0130] like Figures 1 to 6 As shown, a method for collecting and processing data on the carbon footprint of cement products based on their entire life cycle includes the following steps:

[0131] S1. Divide the life cycle of cement products into the ore mining and processing stage, clinker calcination stage, grinding stage, and packaging and shipping stage.

[0132] S2. Obtain the initial cement production stage of the cement product manufacturing enterprise. If the initial cement production stage is the ore mining and processing stage, then start from step S3. If the initial cement production stage is the clinker calcination stage, then start from step S4. If the initial cement production stage is the grinding stage, then start from step S5.

[0133] S3. Obtain the decision tree for data collection and processing in the ore mining and processing stages of cement products, and output the lifecycle list or secondary data of the ore mining and processing stages.

[0134] S4. Obtain the decision tree for data collection and processing of cement clinker calcination stage, and output the life cycle list of clinker calcination stage;

[0135] S5. Obtain the decision tree for data collection and processing in the cement product grinding stage, and output the lifecycle list of the grinding stage;

[0136] S6. Obtain the decision tree for data collection and processing during the packaging and shipping stages of cement products, and output the lifecycle list or secondary data for the packaging and shipping stages. Therefore, in the process of collecting and processing carbon footprint data for cement products, data collection and processing are carried out based on the actual production situation of cement production enterprises. The collection requirements and processing methods for data at each stage of cement products are clarified, and the lifecycle list for each stage of cement products is calculated. This improves the efficiency, accuracy, and completeness of data collection and processing of cement product carbon footprint data. Furthermore, data collection and processing according to decisions allows for comparison of carbon footprint results among different cement product production enterprises, enabling corresponding analysis and processing of carbon emission data from different enterprises.

[0137] In this embodiment, S2 includes the following steps:

[0138] S2-1. Obtain information on the clinker production lines, owned mines, and ore purchases of cement production enterprises;

[0139] S2-2. If the cement product manufacturer has a clinker production line and its own mine, then proceed to step S3.

[0140] S2-3. If a cement product manufacturer has a clinker production line but no mine of its own, and the purchased ore does not need to be processed, but the purchased ore is a key category, then obtain the life cycle inventory or carbon footprint data of the purchased ore, and at the same time obtain the transportation method and mileage of the purchased ore, and then proceed to step S4.

[0141] S2-4. If a cement product manufacturer has a clinker production line but no mine of its own, and the purchased ore does not need to be processed, but the purchased ore is not a critical category, then the secondary data of the ore shall be used, and the transportation method and mileage of the purchased ore shall be obtained at the same time, and then step S4 shall be executed.

[0142] S2-5. If a cement product manufacturing enterprise has a clinker production line but no mine of its own, and the purchased ore needs to be processed, then collect the data of the purchased ore processing process, calculate the life cycle list of the purchased ore processing process, and if the purchased ore is a critical category, then obtain the life cycle list or carbon footprint data of the purchased ore, and at the same time obtain the transportation method and mileage of the purchased ore, and then execute step S4.

[0143] S2-6. If a cement product manufacturing enterprise has a clinker production line but no mine of its own, and the purchased ore needs to be processed, then collect the processing process data of the purchased ore, calculate the life cycle list of the processing process of the purchased ore, and if the purchased ore is not a critical category, then use the secondary data of the ore, and at the same time obtain the transportation method and mileage of the purchased ore, and then execute step S4.

[0144] S2-7. If a cement product manufacturer does not have a clinker production line, but purchasing clinker is a key category, then obtain the life cycle inventory or carbon footprint data of the purchased clinker, and at the same time obtain the transportation method and mileage of the purchased clinker, and then proceed to step S5.

[0145] S2-8. If a cement product manufacturer does not have a clinker production line, but the purchased clinker is not a critical category, then the secondary data for that clinker should be used, and the transportation method and mileage of the purchased clinker should be obtained simultaneously before proceeding to step S5. Therefore, in the process of collecting and processing cement product carbon footprint data, the initial stage of cement product data collection and processing is clarified based on the production process composition of the cement product manufacturer.

[0146] Specifically, in step S2-4, the secondary data of the ore includes: secondary data of the ore mining and processing process; in step S2-5, the life cycle system boundary: starts from the ore entering the plant and ends at the crushed and processed ore entering the stockpile, the functional unit or declared unit: 1 kg limestone (crushed), the data collected on the ore processing process includes: ore purchase quantity, ore processing output, and processing power consumption, and the data calculation: the life cycle list is calculated based on the collected data and the determined functional unit or declared unit.

[0147] In this embodiment, step S3 includes the following steps:

[0148] S3-1. Obtain data on ore mining and ore processing from cement production enterprises;

[0149] Ore mining process:

[0150] S3-2. If the cement product manufacturing enterprise has detailed data for the ore mining process, then collect the data of the ore mining process, calculate the life cycle list of ore mining, and then execute step S3-5, step S3-6, or step S3-7.

[0151] S3-3. If the cement product manufacturing enterprise does not have detailed data for the ore mining process, and the ore mining process is a critical category, then collect the data on ore mining and return to step S3-2.

[0152] S3-4. If the cement product manufacturer does not have detailed data for the ore mining process, and the ore mining process is not a critical category, then use the secondary data of the ore mining process, and then execute step S3-5, step S3-6, or step S3-7.

[0153] Ore processing:

[0154] S3-5. If the cement product manufacturing enterprise has detailed data for the ore processing process, then collect the data of the ore processing process, calculate the life cycle list of the processed ore, and then execute step S4.

[0155] S3-6. If the cement production enterprise does not have detailed data for the ore processing process, and the ore processing process is a critical category, then collect the data on the processed ore and return to step S3-5.

[0156] S3-7. If the cement product manufacturer does not have detailed data for the ore processing process, and the ore processing process is not a critical category, then secondary data from the ore processing process should be used, and step S4 should be executed. Therefore, in the process of collecting and processing carbon footprint data for cement products, data collection and processing are carried out based on the cement manufacturer's free mines, clarifying the data collection requirements and processing methods for the ore mining and processing stages of cement products, and calculating the lifecycle inventory of the ore mining and processing stages of cement products.

[0157] Specifically, in step S3-2, the lifecycle system boundary begins with unmined ore and ends with transportation to the quarry's discharge port. The functional unit or declared unit is 1 kg of limestone (unprocessed). Data collected for the ore mining process includes: ore extraction volume, explosive consumption during blasting, diesel consumption for machinery, and tire consumption. Data calculation: The lifecycle list is calculated based on the collected data and the determined functional unit or declared unit. In step S3-3, the data collected for ore mining is the same as the data collected for the ore mining process in step S3-2. In S3-5, the lifecycle system boundary begins with the ore mined and transported to the discharge port and ends with crushed ore entering the stockpile. The functional unit or declared unit is 1 kg of limestone (crushed). Data collected for the ore processing process includes: ore extraction volume, ore processing output, and processing power consumption. Data calculation: The lifecycle list is calculated based on the collected data and the determined functional unit or declared unit. In step S3-6, the data collected for the ore processing process is the same as the data collected for the ore processing process in step S3-6.

[0158] In this embodiment, step S4 includes the following steps:

[0159] S4-1. Obtain data on fuel preparation, raw meal preparation, clinker calcination, waste heat power generation, and clinker shipment from cement production enterprises;

[0160] Fuel preparation process:

[0161] S4-2. If the cement product manufacturing enterprise has detailed data for the fuel preparation process, then collect the fuel preparation data, calculate the actual raw material consumption, transportation mileage and power consumption data of the fuel used for the clinker, and output result 1, and then execute step S4-8 or step S4-9.

[0162] S4-3. If the cement product manufacturer does not have detailed data for the fuel preparation process, and the fuel preparation process is a critical category, then collect the fuel preparation data and return to step S4-2.

[0163] S4-4. If the cement product manufacturer does not have detailed data for the fuel preparation process, and the fuel preparation process is not a critical category, then collect the necessary data for fuel preparation, output result 1, and then execute step S4-8 or step S4-9.

[0164] Raw material preparation process:

[0165] S4-5. If the cement product manufacturer has detailed data for the raw meal preparation process, collect the raw meal preparation data, calculate the actual raw material consumption, transportation mileage and power consumption data of the raw meal used for the clinker, and output result 2, then execute step S4-8 or step S4-9.

[0166] S4-6. If the cement product manufacturer does not have detailed data for the raw meal preparation process, and the raw meal preparation process is a critical category, then collect the raw meal preparation data and return to step S4-6.

[0167] S4-7. If the cement product manufacturer does not have detailed data for the raw meal preparation process, and the raw meal preparation process is not a critical category, then collect the necessary data for raw meal preparation, output result 2, and then execute step S4-8 or step S4-9.

[0168] Clinker firing process:

[0169] S4-8. If the cement product manufacturer has detailed data for the clinker calcination process, collect the clinker calcination data, calculate the life cycle list of the clinker calcination process, and then execute step S4-10 or step S4-11.

[0170] S4-9. If the cement product manufacturer does not have detailed data for the clinker calcination process, then collect the clinker calcination data and return to step S4-8.

[0171] Waste heat power generation process:

[0172] S4-10. If the cement product manufacturing enterprise has a waste heat power generation unit, collect the data on the grid-connected power generation of the waste heat power generation unit, calculate the grid power consumption of each process, update the grid power consumption to the life cycle list of each process, and then execute step S4-12 or step S4-13 or step S4-14 or step S4-15 or step S4-16.

[0173] S4-11. If the cement product manufacturing enterprise does not have a waste heat power generation unit, then proceed to step S4-12, step S4-13, step S4-14, step S4-15, or step S4-16.

[0174] Clinker shipping process:

[0175] S4-12. If a cement product manufacturer does not produce cement but has detailed data for the clinker shipping process, then collect the clinker shipping data, calculate the clinker shipping lifecycle list, and end the process.

[0176] S4-13. If the cement product manufacturer does not produce cement and has no detailed data for the clinker shipping process, but the clinker shipping process is a critical category, then collect the clinker shipping data and return to step S4-12.

[0177] S4-14. If a cement product manufacturer does not produce cement and there is no detailed data for the clinker shipment process, but clinker shipment is not a critical category, then the secondary data for the clinker shipment process shall be used and the process shall end.

[0178] S4-15. If a cement product manufacturer produces cement and sells some clinker externally, then return to step S1-12, S4-13, or S4-14, do not execute the end step, and execute step S5.

[0179] S4-16. If a cement product manufacturer produces cement but does not sell some of the clinker, then proceed to step S5. Therefore, in step S4-4, since the fuel preparation process is part of the entire clinker calcination process and shares equipment with it, involving numerous allocation issues and being difficult to operate in practice, only accurate data needs to be collected; it cannot be completely separated from the clinker calcination process. Similarly, in step S4-7, since the raw material preparation process is part of the entire clinker calcination process and shares equipment with it, involving numerous allocation issues and being difficult to operate in practice, only accurate data needs to be collected; it cannot be completely separated from the clinker calcination process. In step S4-12, since cement product manufacturers do not produce cement, steps S5 and S6 are unnecessary. In step S4-14, since cement product manufacturers do not produce cement, steps S5 and S6 are unnecessary. During the collection and processing of cement product carbon footprint data, data collection and processing are conducted according to the calcination process of cement production enterprises. The collection requirements and processing methods for extreme data on cement product clinker calcination are clarified, and the lifecycle inventory of the cement product clinker calcination stage is calculated.

[0180] Specifically, in step S4-2, the data collected for fuel preparation includes: fuel output, fuel consumption for clinker, raw material consumption, transportation method of purchased raw materials, mileage, and electricity consumption; in step S4-3, the data collected for fuel preparation is the same as that collected in step S4-2; in step S4-5, the data collected for raw meal preparation includes: raw meal output, raw meal consumption for clinker, raw material consumption, transportation method of purchased raw materials, mileage, and electricity consumption; in step S4-6, the data collected for raw meal preparation is the same as that collected in step S4-5; in step S4-7, the data collected for raw meal preparation includes: raw material consumption, transportation method of purchased raw materials, mileage, and electricity consumption; in step S4-8, the life cycle system boundary: begins with the release of various raw materials and fuels from the warehouse and ends with the receipt of clinker from the warehouse, the functional unit or declared unit: 1 kg of clinker, and the data collected for clinker combustion includes: clinker output, the results of the fuel preparation process, 1. Raw meal preparation. The process results include: 2. Diesel consumption, power consumption, lower heating value of fuel received basis, carbon dioxide emission factor of fuel, chemical analysis of clinker, weight of dust from the kiln head and bypass ventilation, chemical analysis of non-carbonate substitute raw materials, and non-fuel carbon content in raw materials. Data calculation: A life cycle inventory is calculated based on the collected data and the determined functional units or declared units. In step S4-9, the data collected on clinker calcination is the same as the data collected on clinker calcination in step S4-8. In step S4-12, the life cycle system boundary starts at clinker delivery and ends at bulk clinker delivery. The functional unit or life unit is 1 kg of bulk clinker. Data collected on clinker shipment includes: bulk clinker delivery volume, clinker consumption, and power consumption during clinker shipment. Data calculation: A life cycle inventory is calculated based on the collected data and the determined functional units or declared units. In step S4-13, the data collected on clinker shipment is the same as the data collected on clinker shipment in step S4-12.

[0181] Specifically, in step S4-4, the necessary data for fuel preparation includes: the amount of raw materials consumed in the fuel preparation process, the transportation method of purchased raw materials, the mileage, and the power consumption; in step S4-7, the necessary data for raw material preparation includes: the amount of raw materials consumed in the raw material preparation process, the transportation method of purchased raw materials, the mileage, and the power consumption.

[0182] In this embodiment, step S5 includes the following steps:

[0183] S5-1. Obtain data on various types of cement from cement production enterprises;

[0184] S5-2. If cement product manufacturers can obtain detailed data on various types of cement, they can collect grinding data for various types of cement, calculate the life cycle list of cement grinding, and then proceed to step S6.

[0185] S5-3. If cement product manufacturers cannot obtain detailed data on various types of cement, and these types of cement are key categories, then collect grinding data for various types of cement and return to step S5-2.

[0186] S5-4. If cement manufacturers cannot obtain detailed data on various types of cement, and these types of cement are not critical categories, then collect cement grinding data, calculate the lifecycle inventory of cement grinding, and proceed to step S6. Therefore, in the process of collecting and processing cement product carbon footprint data, data collection and processing are carried out according to the grinding process of cement manufacturers, clarifying the collection requirements and processing methods for cement product grinding stage data, and calculating the lifecycle inventory of cement product grinding stages.

[0187] Specifically, in step S5-2, the lifecycle system boundary begins with the release of clinker, gypsum, and auxiliary materials and ends with the receipt of various types of cement. The functional unit or declared unit is 1 kg of cement. The grinding data for various types of cement is collected, including the output of various types of cement, the consumption of corresponding raw materials for various types of cement, and the energy consumption for various types of cement. Data calculation: The lifecycle list is calculated based on the collected data and the determined functional unit or declared unit. In step S5-3, the grinding data for various types of cement is collected in the same way as in step S5-2. In step S5-4, the lifecycle system boundary begins with the release of clinker, gypsum, and auxiliary materials and ends with the receipt of cement. The functional unit or declared unit is 1 kg of cement. The grinding data for cement is collected, including the output of cement, the consumption of corresponding raw materials for cement, and the energy consumption for cement. Data calculation: The lifecycle list is calculated based on the collected data and the determined functional unit or declared unit.

[0188] Specifically, in step S5-2, the cement has a specific type, such as PO52.5, PO42.5, M32.5; in step S5-4, the cement does not have a specific type.

[0189] In this embodiment, step S6 includes the following steps:

[0190] S6-1. Obtain energy consumption data for cement packaging and shipping from cement production enterprises;

[0191] S6-2. If the energy consumption data for cement packaging and shipping is included in the grinding stage, and detailed process data for cement packaging and shipping cannot be extracted, then calculate the cement lifecycle inventory including the packaging and shipping stages, and end the process.

[0192] S6-3. If the energy consumption data for cement packaging and shipping is included in the grinding stage, but detailed process data for cement packaging and shipping can be extracted, then collect the cement packaging and shipping data, calculate the life cycle inventory of cement packaging and shipping, and end the process.

[0193] S6-4. If the energy consumption data for cement packaging and shipping is not included in the grinding stage, but there is detailed data for the packaging and shipping stage, then collect the cement packaging and shipping data, calculate the life cycle inventory of cement packaging and shipping, and end the process.

[0194] S6-5. If the energy consumption data for cement packaging and shipping is not included in the grinding stage, and there is no detailed data for the packaging and shipping process, and the packaging and shipping process is a critical category, then collect the data for cement packaging and shipping and return to step S6-4.

[0195] S6-6. If energy consumption data for cement packaging and shipping is not included in the grinding stage, and there is no detailed data for the packaging and shipping process, and the packaging and shipping process is not a critical category, then secondary data for the cement packaging and shipping process should be used, and the process should end. Therefore, in the process of collecting and processing carbon footprint data for cement products, data collection and processing are carried out based on the packaging and shipping processes of cement product enterprises. The collection requirements and processing methods for data in the cement product packaging and shipping stages are clarified, and a lifecycle inventory of the cement product packaging and shipping stages is calculated.

[0196] Specifically, in step S6-3, the lifecycle system boundary begins with cement leaving the warehouse and ends with the shipment of bagged or bulk cement. The functional unit or declared unit is 1 kg of bagged or bulk cement. Data collected on bagged cement packaging and shipment includes: bagged cement production, cement consumption, packaging bag consumption, and electricity consumption in the packaging process. Data collected on bulk cement packaging and shipment includes: bulk cement production, cement consumption, and electricity consumption in the shipment process. Data calculation: The lifecycle list is calculated based on the collected data and the determined functional unit or declared unit. In step S6-4, the data collected on cement packaging and shipment is the same as that collected in step S6-3.

[0197] In this embodiment, in steps S3, S4, S5, and S6, the data calculation of the lifecycle inventory first requires determining the time range T and dividing it into time units t. Then, based on the divided time units, system boundaries, and data collection requirements, all data is organized into n parts and calculated.

[0198] The calculation process involves the following two scenarios:

[0199] Scenario 1:

[0200] The collected data is complete, and the consumption α of raw materials and energy for each data set is calculated based on the functional or declared units of each process. i Then calculate the geometric mean A of multiple data sets. g and geometric standard deviation A gsd Or the arithmetic mean A m and arithmetic standard deviation A sd The calculation formula is as follows:

[0201] The unit product input α and consumption α in the i-th data set i The calculation formula is:

[0202]

[0203] Input the geometric mean A of α g The calculation formula is:

[0204]

[0205] Input the geometric standard deviation A of α gsd The calculation formula is:

[0206]

[0207] Input the arithmetic mean A of α m The calculation formula is:

[0208]

[0209] The arithmetic standard deviation A of input α sd The calculation formula is:

[0210]

[0211] Where: α i The unit, M α，i unit, A g unit, A m The unit and A sd The units of M are all related to the properties of α. α，i M represents the consumption of input α in the i-th data set. pro，i A represents the output of the product in the i-th data set, in kg. gsd The unit is dimensionless;

[0212] Scenario 2:

[0213] The collected data is incomplete. Calculate the consumption of raw materials and energy based on the functional or declared units of each process, and the unit product input α consumption α within the time range T. input The calculation formula is:

[0214]

[0215] Where: n = T / t, α input The unit and M a，total The units of M are all related to the properties of α. a，total M represents the total consumption of input α within the time range T. pro，total This represents the total output of products within a time frame T, expressed in kg. Therefore, in the process of collecting and processing the carbon footprint of cement products, a method for calculating the life cycle inventory data of cement products is provided. This method is applicable to calculating the consumption of raw materials and energy for each process within a functional unit or life unit, obtaining accurate initial data that includes dispersion, and improving the accuracy of life cycle assessment results.

[0216] Specifically, M α，i M pro，i M a，total and M a，total All results were obtained, geometric mean A g and geometric standard deviation A gsd One-to-one correspondence, arithmetic mean A m and arithmetic standard deviation A sd One-to-one correspondence, that is, calculating the geometric mean A. g Then the geometric standard deviation A needs to be calculated. gsd Calculate the arithmetic mean A m Then the arithmetic standard deviation A needs to be calculated. sd .

[0217] For example: if the input α is the weight of the raw material, then α i The unit, M α，i unit, A g unit, A m unit, A sd The unit, α input The unit and M a，total The units are all kg. If the input α is the energy source for energy measurement, then α i The unit, M α，i unit, A g unit, A m unit, A sd The unit, α input The unit and M a，total The units are all kWh or MJ.

[0218] In this embodiment, in step S4, the actual consumption β input during clinker production in the i-th data set of the fuel preparation process is β. i The calculation formula is:

[0219]

[0220] Where: β i The unit and M β，i The units of M are all related to the properties of β. β，i M represents the consumption of input β in the i-th data set. fuel，i M represents the fuel production in the i-th data set, in kg. cons，i This represents the actual fuel consumption during clinker production in the i-th data set, expressed in kg.

[0221] In step S4, the actual consumption of input γ during the clinker production process in the i-th data set of the raw material preparation process is γ. i The calculation formula is:

[0222]

[0223] Wherein: γ i Units, N γ，i The units are all related to the properties of γ, N γ，i N represents the consumption of input γ in the i-th data set. raw，i N represents the yield of raw materials in the i-th data set, in kg. cons，i This represents the actual amount of raw materials consumed during the clinker production process in the i-th data set, in kg.

[0224] The calculation of carbon dioxide emissions during clinker calcination is divided into two parts:

[0225] Part One:

[0226] The calculation formula for CO2 emissions from the combustion of non-biochar in fossil fuels and alternative fuels during clinker calcination is as follows:

[0227] CO2 emissions from the combustion of the jth type of fossil fuel during clinker calcination (CE) fossil，j The calculation formula is:

[0228]

[0229] Non-biocarbon emissions (CE) from the jth alternative fuel during clinker calcination alter，j The calculation formula is:

[0230] CE alter，j =M alter，j *Qnet alter，ar，j *EF j *ε j , (j = 1, 2, ..., n);

[0231] Emissions from fuel combustion during clinker calcination (CE) fuel，emissionThe calculation formula is:

[0232] CE fuel，emission =CE fossil，j +CE alter，j ;

[0233] Among them: CE fossil，j Units, CE alter，j Units and CE fuel，emission The units are all kgCO2e, M fossil，j Qnet represents the consumption of the j-th fossil fuel during clinker combustion, expressed in tons (t). fossil，ar，j This represents the received minimum calorific value of the j-th fossil fuel during clinker combustion, expressed in GJ / t, CC. j This represents the carbon content per unit calorific value of the j-th fossil fuel during clinker combustion, expressed in kgC / GJ, OF. j The carbon oxidation rate of the j-th fossil fuel during clinker combustion is expressed as a percentage (%). 44 / 12 represents the conversion factor from C to CO2, M. alter，j Qnet represents the consumption of the j-th alternative fuel during clinker calcination, in tons (t). alter，ar，j EF represents the received basic calorific value of the j-th alternative fuel during clinker combustion, expressed in GJ / t. j ε represents the CO2 emission factor of the j-th alternative fuel during clinker combustion, expressed in kgCO2 / GJ. j This indicates the non-biomass carbon content of the j-th alternative fuel during clinker calcination, expressed in %;

[0234] Part Two:

[0235] The calculation formula for CO2 generated during the clinker calcination process from the decomposition of raw material carbonates and the calcination of non-fuel carbon is as follows:

[0236] Clinker calcination process raw material carbonate decomposition emissions (CE) process，1 The calculation formula is:

[0237]

[0238] Non-fuel carbon emissions during clinker calcination (CE) process，2 The calculation formula is:

[0239]

[0240] Total CE emissions from raw material carbonate decomposition and non-fuel carbon calcination during clinker calcination process The calculation formula is:

[0241] CE process =CE process，1 +CEprocess，2 ;

[0242] Among them, CE process，1 Units, CE process，2 Units and CE process The units for all values ​​are kgCO2e and P. ck P represents the clinker yield during the clinker calcination process, expressed in kg. ckd This indicates the weight of dust from the kiln head exhaust stack during clinker calcination, expressed in kg (P). bpd This indicates the weight of dust emitted during the kiln bypass ventilation in the clinker firing process, in kg. cao This indicates the calcium oxide content in clinker, expressed as a percentage (CK). cao，nu This indicates the content of calcium oxide in clinker that is not derived from carbonate decomposition, expressed in %. CK mgo This indicates the magnesium oxide content in the clinker, expressed as a percentage (CK). mgo，nu This indicates the content of magnesium oxide in the clinker that is not derived from carbonate decomposition. 44 / 56 represents the conversion factor from CaO to CO2, 44 / 40 represents the conversion factor from MgO to CO2, and RA represents the amount of raw meal consumed during clinker calcination, in kg. C This indicates the non-fuel carbon content in the raw meal (which can be 0.1%-0.3% (dry basis). The higher value should be used when the raw meal is made from coal gangue, high-carbon fly ash, etc., otherwise the lower value should be used), and the unit is %;

[0243] The calculation of the electricity consumption of cement production enterprises with waste heat power generation units includes the following steps:

[0244] Step 1:

[0245] Clearly define the processes by which waste heat power generation is used in production, and collect relevant statistical data on electricity consumption in these processes;

[0246] Step Two:

[0247] The electricity consumption of the power grid in the m-th production process is E grid，m The calculation formula is:

[0248]

[0249] Step 3:

[0250] Step 2E grid，m The computational structure is returned to the production process in step one;

[0251] Among them: E grid，m The unit is kWh, E st，m This represents the electricity statistics for the m-th production process, in kWh (E). heat This represents the electricity generated by waste heat power generation connected to the grid, in kWh (E). st，tatalThis indicates the total electricity consumption of production processes using waste heat power, measured in kWh. Therefore, in the process of collecting and processing carbon footprint data for cement products, this document provides methods for calculating the actual consumption of raw materials and energy in the fuel preparation and raw material preparation processes, avoiding data errors and inaccuracies caused by directly using raw material consumption data. Furthermore, it provides methods for calculating carbon dioxide emissions from the decomposition of fossil fuels and carbonates in clinker during clinker burning, making the calculation of the processes with the highest carbon dioxide emissions more scientific, reasonable, and comparable. Finally, it provides methods for calculating the grid electricity consumption of cement production enterprises using waste heat power generation units, avoiding overestimation of carbon dioxide emissions that have not been deducted from the use of waste heat power.

[0252] Specifically, M β，i M fuel，i M cons，i N γ，i N raw，i N cons，i M fossil，i Qnet fossil，ar，i M alter，j P ck P ckd P bpd CK cao CK cao，nu CK mgo CK mgo，nu Both RA and CC are obtained through acquisition. i OF i Qnet alter，ar，j EF j ε i and RA C All are standard values.

[0253] For example: if the input β is the raw material measured by weight, then β i The unit and M β，i The units are all kg. If the input β is the energy source for energy measurement, then β i The unit and M β，i The units are all kWh or MJ; if γ is input as raw material measured by weight, then γ i The unit and N γ，i The unit for all values ​​is kg. If the input γ is the energy source for energy measurement, then γ i The unit and N γ，i The units are all kWh or MJ.

[0254] It should be noted that: 1. Key categories: According to the following calculation formula, the emission proportions of each process are arranged in descending order. For processes whose sum exceeds 95%, the emission proportion of the i-th process to the clinker or cement product emissions is δ. i The calculation formula is:

[0255]

[0256] Where, δ i The unit is %, CE i This represents the carbon dioxide emissions from the i-th process, expressed in kgCO2e and CE. total This indicates the carbon dioxide emissions from clinker or cement, expressed in kgCO2e.

[0257] 2. Secondary data includes: data from databases and published literature, default emission factors from national databases, calculated data, estimates, or other representative data, such as: ecoinvent database, China's product life cycle greenhouse gas emission coefficient database, etc.

[0258] In summary, this invention, in the process of collecting and processing carbon footprint data of cement products, conducts data collection and processing based on the actual production situation of cement production enterprises, clarifies the data collection requirements and processing methods for each stage of cement product development, and calculates the life cycle inventory of cement products at each stage. This can improve the efficiency of cement product carbon footprint data collection, the accuracy and completeness of data processing. At the same time, collecting and processing data according to decisions allows for comparison of carbon footprint results of different cement product production enterprises, and corresponding analysis and processing can be performed on the carbon emission data of different cement product production enterprises.

[0259] The above description is based on the preferred embodiments of the present invention. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A method for collecting and processing data on the carbon footprint of cement products based on their entire life cycle, characterized in that, Includes the following steps: S1. Divide the life cycle of cement products into the ore mining and processing stage, clinker calcination stage, grinding stage, and packaging and shipping stage. S2. Obtain the initial cement production stage of the cement product manufacturing enterprise. If the initial cement production stage is the ore mining and processing stage, then start from step S3. If the initial cement production stage is the clinker calcination stage, then start from step S4. If the initial cement production stage is the grinding stage, then start from step S5. S2-1. Obtain information on the clinker production lines, owned mines, and ore purchases of cement production enterprises; S2-2. If the cement product manufacturer has a clinker production line and its own mine, then proceed to step S3. S2-3. If a cement product manufacturer has a clinker production line but no mine of its own, and the purchased ore does not need to be processed, but the purchased ore is a key category, then obtain the life cycle inventory or carbon footprint data of the purchased ore, and at the same time obtain the transportation method and mileage of the purchased ore, and then proceed to step S4. S2-4. If a cement product manufacturer has a clinker production line but no mine of its own, and the purchased ore does not need to be processed, but the purchased ore is not a critical category, then the secondary data of the ore shall be used, and the transportation method and mileage of the purchased ore shall be obtained at the same time, and then step S4 shall be executed. S2-5. If a cement product manufacturing enterprise has a clinker production line but no mine of its own, and the purchased ore needs to be processed, then collect the data of the purchased ore processing process, calculate the life cycle list of the purchased ore processing process, and if the purchased ore is a critical category, then obtain the life cycle list or carbon footprint data of the purchased ore, and at the same time obtain the transportation method and mileage of the purchased ore, and then execute step S4. S2-6. If a cement product manufacturing enterprise has a clinker production line but no mine of its own, and the purchased ore needs to be processed, then collect the processing process data of the purchased ore, calculate the life cycle list of the processing process of the purchased ore, and if the purchased ore is not a critical category, then use the secondary data of the ore, and at the same time obtain the transportation method and mileage of the purchased ore, and then execute step S4. S2-7. If a cement product manufacturer does not have a clinker production line, but purchasing clinker is a key category, then obtain the life cycle inventory or carbon footprint data of the purchased clinker, and at the same time obtain the transportation method and mileage of the purchased clinker, and then proceed to step S5. S2-8. If a cement product manufacturer does not have a clinker production line, but the purchased clinker is not a critical category, then the secondary data of the clinker shall be used, and the transportation method and mileage of the purchased clinker shall be obtained at the same time, and then step S5 shall be executed. S3. Obtain the decision tree for data collection and processing in the ore mining and processing stages of cement products, and output the lifecycle list or secondary data of the ore mining and processing stages. S4. Obtain the decision tree for data collection and processing of cement clinker calcination stage, and output the life cycle list of clinker calcination stage; In step S4, the actual consumption β of input β during clinker production in the i-th data set of the fuel preparation process. i The calculation formula is: ,(i=1,2,…,n); Where: β i The unit and M β，i The units of M are all related to the properties of β. β，i M represents the consumption of input β in the i-th data set. fuel，i M represents the fuel production in the i-th data set, in kg. cons，i This represents the actual fuel consumption during clinker production in the i-th data set, in kg. In step S4, the actual consumption of input γ during the clinker production process in the i-th data set of the raw material preparation process is γ. i The calculation formula is: ,(i=1,2,…,n); Wherein: γ i Units, N γ，i The units are all related to the properties of γ, N γ，i N represents the consumption of input γ in the i-th data set. raw，i N represents the yield of raw materials in the i-th data set, in kg. cons，i This represents the actual amount of raw materials consumed during the clinker production process in the i-th data set, in kg. S5. Obtain the decision tree for data collection and processing in the cement product grinding stage, and output the lifecycle list of the grinding stage; S6. Obtain the decision tree for data collection and processing during the packaging and shipping stages of cement products, and output a lifecycle list or secondary data for the packaging and shipping stages.

2. The method for data collection and processing of cement product carbon footprint based on the entire life cycle as described in claim 1, characterized in that, Step S3 includes the following steps: S3-1. Obtain data on ore mining and ore processing from cement production enterprises; Ore mining process: S3-2. If the cement product manufacturing enterprise has detailed data for the ore mining process, then collect the data of the ore mining process, calculate the life cycle list of ore mining, and then execute step S3-5, step S3-6, or step S3-7. S3-3. If the cement product manufacturing enterprise does not have detailed data for the ore mining process, and the ore mining process is a critical category, then collect the data on ore mining and return to step S3-2. S3-4. If the cement product manufacturer does not have detailed data for the ore mining process, and the ore mining process is not a critical category, then use the secondary data of the ore mining process, and then execute step S3-5, step S3-6, or step S3-7. Ore processing: S3-5. If the cement product manufacturing enterprise has detailed data for the ore processing process, then collect the data of the ore processing process, calculate the life cycle list of the processed ore, and then execute step S4. S3-6. If the cement production enterprise does not have detailed data for the ore processing process, and the ore processing process is a critical category, then collect the data on the processed ore and return to step S3-5. S3-7. If the cement product manufacturer does not have detailed data for the ore processing process, and the ore processing process is not a critical category, then use the secondary data of the ore processing process and then execute step S4.

3. The method for data collection and processing of cement product carbon footprint based on the entire life cycle as described in claim 2, characterized in that, Step S4 includes the following steps: S4-1. Obtain data on fuel preparation, raw meal preparation, clinker calcination, waste heat power generation, and clinker shipment from cement production enterprises; Fuel preparation process: S4-2. If the cement product manufacturing enterprise has detailed data for the fuel preparation process, then collect the fuel preparation data, calculate the actual raw material consumption, transportation mileage and power consumption data of the fuel used for the clinker, and output result 1, and then execute step S4-8 or step S4-9. S4-3. If the cement product manufacturer does not have detailed data for the fuel preparation process, and the fuel preparation process is a critical category, then collect the fuel preparation data and return to step S4-2. S4-4. If the cement product manufacturer does not have detailed data for the fuel preparation process, and the fuel preparation process is not a critical category, then collect the necessary data for fuel preparation, output result 1, and then execute step S4-8 or step S4-9. Raw material preparation process: S4-5. If the cement product manufacturer has detailed data for the raw meal preparation process, collect the raw meal preparation data, calculate the actual raw material consumption, transportation mileage and power consumption data of the raw meal used for the clinker, and output result 2, then execute step S4-8 or step S4-9. S4-6. If the cement product manufacturer does not have detailed data for the raw meal preparation process, and the raw meal preparation process is a critical category, then collect the raw meal preparation data and return to step S4-6. S4-7. If the cement product manufacturer does not have detailed data for the raw meal preparation process, and the raw meal preparation process is not a critical category, then collect the necessary data for raw meal preparation, output result 2, and then execute step S4-8 or step S4-9. Clinker firing process: S4-8. If the cement product manufacturer has detailed data for the clinker calcination process, collect the clinker calcination data, calculate the life cycle list of the clinker calcination process, and then execute step S4-10 or step S4-11. S4-9. If the cement product manufacturer does not have detailed data for the clinker calcination process, then collect the clinker calcination data and return to step S4-8. Waste heat power generation process: S4-10. If the cement product manufacturing enterprise has a waste heat power generation unit, collect the data on the grid-connected power generation of the waste heat power generation unit, calculate the grid power consumption of each process, update the grid power consumption to the life cycle list of each process, and then execute step S4-12 or step S4-13 or step S4-14 or step S4-15 or step S4-16. S4-11. If the cement product manufacturing enterprise does not have a waste heat power generation unit, then proceed to step S4-12, step S4-13, step S4-14, step S4-15, or step S4-16. Clinker shipping process: S4-12. If a cement product manufacturer does not produce cement but has detailed data for the clinker shipping process, then collect the clinker shipping data, calculate the clinker shipping lifecycle list, and end the process. S4-13. If the cement product manufacturer does not produce cement and has no detailed data for the clinker shipping process, but the clinker shipping process is a critical category, then collect the clinker shipping data and return to step S4-12. S4-14. If a cement product manufacturer does not produce cement and has no detailed data for the clinker shipment process, but clinker shipment is not a critical category, then use the secondary data for the clinker shipment process and end the process. S4-15. If a cement product manufacturer produces cement and sells some clinker externally, then return to step S4-12, S4-13, or S4-14, do not execute the end step, and execute step S5. S4-16. If a cement product manufacturer produces cement but does not sell some of the clinker, then proceed to step S5.

4. The method for data collection and processing of cement product carbon footprint based on the entire life cycle as described in claim 3, characterized in that, Step S5 includes the following steps: S5-1. Obtain data on various types of cement from cement production enterprises; S5-2. If cement product manufacturers can obtain detailed data on various types of cement, they can collect grinding data for various types of cement, calculate the life cycle list of cement grinding, and then proceed to step S6. S5-3. If cement product manufacturers cannot obtain detailed data on various types of cement, and these types of cement are key categories, then collect grinding data for various types of cement and return to step S5-2. S5-4. If cement product manufacturers cannot obtain detailed data on various types of cement, and these types of cement are not key categories, then collect cement grinding data, calculate the life cycle list of cement grinding, and then proceed to step S6.

5. The method for data collection and processing of cement product carbon footprint based on the entire life cycle as described in claim 4, characterized in that, Step S6 includes the following steps: S6-1. Obtain energy consumption data for cement packaging and shipping from cement production enterprises; S6-2. If the energy consumption data for cement packaging and shipping is included in the grinding stage, and detailed process data for cement packaging and shipping cannot be extracted, then calculate the cement lifecycle inventory including the packaging and shipping stages, and end the process. S6-3. If the energy consumption data for cement packaging and shipping is included in the grinding stage, but detailed process data for cement packaging and shipping can be extracted, then collect the cement packaging and shipping data, calculate the life cycle inventory of cement packaging and shipping, and end the process. S6-4. If the energy consumption data for cement packaging and shipping is not included in the grinding stage, but there is detailed data for the packaging and shipping stage, then collect the cement packaging and shipping data, calculate the life cycle inventory of cement packaging and shipping, and end the process. S6-5. If the energy consumption data for cement packaging and shipping is not included in the grinding stage, and there is no detailed data for the packaging and shipping process, and the packaging and shipping process is a critical category, then collect the data for cement packaging and shipping and return to step S6-4. S6-6. If energy consumption data for cement packaging and shipping is not included in the grinding stage, and there is no detailed data for the packaging and shipping process, and the packaging and shipping process is not a critical category, then secondary data for the cement packaging and shipping process shall be used, and the process shall end.

6. The method for data collection and processing of cement product carbon footprint based on the entire life cycle as described in claim 5, characterized in that, In steps S3, S4, S5, and S6, the data calculation for the lifecycle inventory first requires determining the time range T and dividing it into time units t. Then, based on the divided time units, system boundaries, and data collection requirements, all data is organized into n parts and calculated. The calculation process involves the following two scenarios: Scenario 1: The collected data is complete, and the consumption α of raw materials and energy for each data set is calculated based on the functional or declared units of each process. i Then calculate the geometric mean A of multiple data sets. g and geometric standard deviation A gsd Or the arithmetic mean A m and arithmetic standard deviation A sd The calculation formula is as follows: The unit product input α and consumption α in the i-th data set i The calculation formula is: ,(i=1,2,…,n); Input the geometric mean A of α g The calculation formula is: ,(i=1,2,…,n); Input the geometric standard deviation A of α gsd The calculation formula is: ； Input the arithmetic mean A of α m The calculation formula is: ,(i=1,2,…,n); The arithmetic standard deviation A of input α sd The calculation formula is: ； Where: α i The unit, M α，i unit, A g unit, A m The unit and A sd The units of M are all related to the properties of α. α，i M represents the consumption of input α in the i-th data set. pro，i A represents the output of the product in the i-th data set, in kg. gsd The unit is dimensionless; Scenario 2: The collected data is incomplete. Calculate the consumption of raw materials and energy based on the functional or declared units of each process, and the unit product input α consumption α within the time range T. input The calculation formula is: ,(i=1,2,…,n); Where: n = T / t, α input The unit and M a，total The units are all related to the properties of α, M a，total M represents the total consumption of input α within the time range T. pro，total This represents the total output of products within a time range T, expressed in kg.

7. The method for data collection and processing of cement product carbon footprint based on the entire life cycle as described in claim 1, characterized in that, In step S4, the calculation of carbon dioxide emissions during clinker calcination is divided into two parts: Part One: The calculation formula for CO2 emissions from the combustion of non-biochar in fossil fuels and alternative fuels during clinker calcination is as follows: CO2 emissions from the combustion of the jth type of fossil fuel during clinker calcination (CE) fossil，j The calculation formula is: ,(j=1,2,…,n); Non-biocarbon emissions (CE) of the jth alternative fuel during clinker calcination alter，j The calculation formula is: ,(j=1,2,…,n); Emissions from fuel combustion during clinker calcination (CE) fuel，emission The calculation formula is: ； Among them: CE fossil，j Units, CE alter，j Units and CE fuel，emission The units are all kgCO2e, M fossil，j Qnet represents the consumption of the j-th fossil fuel during clinker combustion, expressed in tons (t). fossil，ar，j This represents the received minimum calorific value of the j-th fossil fuel during clinker combustion, expressed in GJ / t, CC. j This represents the carbon content per unit calorific value of the j-th fossil fuel during clinker combustion, expressed in kgC / GJ, OF. j The carbon oxidation rate of the j-th fossil fuel during clinker combustion is expressed as a percentage (%). 44 / 12 represents the conversion factor from C to CO2, M. alter，j Qnet represents the consumption of the j-th alternative fuel during clinker calcination, in tons (t). alter，ar，j EF represents the received basic calorific value of the j-th alternative fuel during clinker combustion, expressed in GJ / t. j ε represents the CO2 emission factor of the j-th alternative fuel during clinker combustion, expressed in kgCO2 / GJ. j This indicates the non-biomass carbon content of the j-th alternative fuel during clinker combustion, expressed in % (%). Part Two: The calculation formula for CO2 generated during the clinker calcination process from the decomposition of raw material carbonates and the calcination of non-fuel carbon is as follows: Clinker calcination process raw material carbonate decomposition emissions (CE) process，1 The calculation formula is: ； Non-fuel carbon emissions during clinker calcination (CE) process，2 The calculation formula is: ； Total CE emissions from raw material carbonate decomposition and non-fuel carbon calcination during clinker calcination process The calculation formula is: ； Among them, CE process，1 Units, CE process，2 Units and CE process The units for all values ​​are kgCO2e and P. ck P represents the clinker yield during the clinker calcination process, expressed in kg. ckd This indicates the weight of dust from the kiln head exhaust stack during clinker calcination, expressed in kg (P). bpd This indicates the weight of dust emitted during the kiln bypass ventilation in the clinker firing process, in kg. cao This indicates the calcium oxide content in clinker, expressed as a percentage (CK). cao，nu This indicates the content of calcium oxide in clinker that is not derived from carbonate decomposition, expressed in %. CK mgo This indicates the magnesium oxide content in the clinker, expressed as a percentage (CK). mgo，nu This indicates the content of magnesium oxide in the clinker that is not derived from carbonate decomposition. 44 / 56 represents the conversion factor from CaO to CO2, 44 / 40 represents the conversion factor from MgO to CO2, and RA represents the amount of raw meal consumed during clinker calcination, in kg. C This indicates the non-fuel carbon content in the raw food, expressed in percent.

8. The method for data collection and processing of cement product carbon footprint based on the entire life cycle as described in claim 1, characterized in that, In step S4, the calculation of the power grid consumption of cement production enterprises with waste heat power generation units includes the following steps: Step 1: Clearly define the processes by which waste heat power generation is used in production, and collect relevant statistical data on electricity consumption in these processes; Step Two: The electricity consumption of the power grid in the m-th production process is E grid，m The calculation formula is: ； Step 3: Step 2E grid，m The computational structure is returned to the production process in step one; Among them: E grid，m The unit is kWh, E st，m This represents the electricity statistics for the m-th production process, in kWh (E). heat This represents the electricity generated by waste heat power generation connected to the grid, in kWh (E). st，tatal This indicates the total electricity metering for production processes that utilize waste heat and electricity, in kWh.

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