Sock product carbon footprint accounting method and system

Abstract

The invention provides a sock product carbon footprint accounting method and system. The method comprises sock product raw material acquisition stage carbon footprint accounting, raw material transportation stage carbon footprint accounting and sock product production stage carbon footprint accounting. A calculation system is invented based on the method, and the method comprises the steps of establishing a sock product carbon footprint accounting model, establishing a sock product carbon emission factor database, carrying out carbon emission data acquisition and carrying out carbon label production. According to the method, the integrity of the carbon footprint data can be improved, the traceability of the data is ensured, and direct use by downstream manufacturers and consumers is facilitated.

Description

[Technical field]

[0001] The invention relates to the technical field of carbon footprint, and in particular to a real-time online generation system for a carbon footprint mark. [Background technology]

[0002] The textile industry emits between 1.22 and 2.93 billion tonnes of carbon dioxide into the atmosphere each year, and it is estimated that the life cycle of textiles accounts for 6.7% of total global greenhouse gas emissions.

[0003] The Chinese patent with patent number CN108228935A discloses a method for checking and calculating carbon emissions of textile enterprises. It mainly uses the principle of output splitting to link the proportional relationship of product output with the amount of public input, calculates the amount of enterprise input when producing a single textile, and thus measures the carbon emissions of the public input part when producing the product. The carbon emissions of the production part and the public part are superimposed to calculate the total carbon emissions of a single textile product in the production cycle. Although the above patent solves the problem of carbon emission calculation, it still has the following problems:

[0004] 1. The patent only calculates the carbon footprint of the production stage, and the correlation of the data feedback is low, which cannot reflect the complete carbon footprint data of the product.

[0005] 2. The data calculated by this patent has serious lags, which is not conducive to the real-time display of carbon footprint data during product circulation, and is not conducive to the downstream use of carbon footprint data.

[0006] The Chinese patent with the patent number CN 116757732 discloses a method for verifying and calculating carbon emissions of textile enterprises. The activity level of fossil fuel combustion is calculated based on the consumption of various fossil fuels and the average low calorific value in the reporting year. The activity level data of the ith fossil fuel can be calculated more accurately. By constructing an identification model for each load, the target power consumption characteristics corresponding to the target time series data of each key feature in the key feature subset can be quickly obtained, and the operating characteristics of the load can be accurately determined. Although the above patent improves the efficiency and accuracy of data acquisition, the following problems still exist:

[0007] 1. This patent calculates carbon emissions at the enterprise level and cannot actually reflect the carbon emissions data of a single product.

[0008] 2. This patent uses annual data statistics, which cannot reflect the timeliness of the data and is not conducive to the use of data by downstream manufacturers during product circulation.

[0009] 3. The patent lacks upstream product data: such as data on raw material production.

[0010] At present, there is no real-time carbon label generation system for socks products in China, and it is impossible to distinguish the carbon labels of different batches of products in a timely manner. [Summary of the invention]

[0011] The purpose of the present invention is to solve the problems in the prior art and provide a carbon footprint accounting method for knitted socks products throughout their life cycle, including carbon footprint accounting in the raw material acquisition stage, raw material transportation stage and product production stage, and design a carbon label online generation system based on this method. The system can automatically collect data, calculate, and produce carbon labels online, improving the real-time and traceability of carbon labels.

[0012] To achieve the above purpose, the carbon footprint calculation method of the present invention is as follows:

[0013] S1. Carbon footprint accounting at the raw material acquisition stage

[0014] The raw materials of socks include natural fibers, chemical fibers, printing and dyeing materials, packaging materials, etc. The carbon footprint of the raw material acquisition stage includes the carbon footprint of the raw materials used in a pair of socks from the mining of raw materials to the production and processing of raw material products. The raw material composition is confirmed according to the specifications of knitted socks, and a raw material carbon emission factor library is established. The data can be queried from the literature, or the supplier can be asked to provide a carbon footprint report issued by a third party. The carbon footprint data of the raw material acquisition stage is calculated according to formula (1):

[0015]

[0016] Where: C1——Carbon footprint accounting data of the socks raw material acquisition stage, unit is kgCO2e / pair;

[0017] a i ——The amount of the i-th raw material, in kg / pair;

[0018] b i ——Carbon emission factor of the ith raw material, in kgCO2e / kg.

[0019] S2. Carbon footprint accounting for raw material transportation

[0020] The carbon footprint of the raw material transportation stage refers to the carbon emissions generated when a pair of socks is transported from the raw material production site to the factory. Transportation methods include: tram rail transportation, coal-fired freight rail transportation, air transportation, water transportation, diesel land transportation, gasoline land transportation, tram land transportation, etc. Establish a raw material database, confirm suppliers and transportation methods, and confirm the carbon emission factors of various transportation methods based on literature. The carbon footprint of the raw material transportation stage is calculated according to formula (2):

[0021]

[0022] Where: C2——Carbon footprint accounting data of the transportation stage of socks raw materials, unit is kgCO2e / pair;

[0023] a i ——The amount of the i-th raw material, in kg / pair;

[0024] c i ——Carbon emission factor for transportation of the i-th raw material, in kgCO2e / (kg*km)

[0025] l i ——Transportation distance of the ith raw material, in km.

[0026] S3. Carbon footprint accounting in the production stage

[0027] The carbon footprint accounting of the production stage includes carbon emissions from electricity consumption in the processes of yarn rewinding, spinning, sewing, shaping, printing and dyeing, and packaging, carbon emissions from heat consumption in the ironing stage, carbon emissions from natural gas consumption of some equipment, carbon emissions from solid waste, waste gas and wastewater treatment processes, and carbon emissions from the on-site transportation stage. Since the production stage is mostly batch production, batch data statistics are used for accounting in this stage. A carbon emission factor database is established, and the main parameters are electricity carbon emission factor, steam carbon emission factor, natural gas carbon emission factor, wastewater treatment carbon emission factor, waste treatment carbon emission factor, and waste gas treatment carbon emission factor. The above data can refer to the existing national policies, relevant literature, and a carbon emission factor database that meets the regulations.

[0028] S3.1 Electricity carbon footprint calculation

[0029] The electricity consumption in the production stage mainly includes the electricity consumption of the equipment used in the yarn reeling, spinning, shaping, embroidery (printing) and packaging processes, as well as the electrical equipment such as air compressors and air conditioners used for production activities. The electricity consumption of the above equipment is calculated as one batch of electricity (Q 电 ), the carbon emissions from electricity consumption are calculated according to formula (3):

[0030] C 3.1 =c 电 Q 电 / n……………………(3)

[0031] Where: C 3.1 ——Carbon footprint accounting data of electricity consumption in the socks processing process, in kgCO2e / pair;

[0032] c 电 ——Electricity carbon emission factor, unit is kgCO2e / kWh

[0033] Q 电 ——The amount of electricity purchased during the production of a batch of socks, in kWh

[0034] n——the output of a batch of socks, in pairs.

[0035] S3.2 Thermal carbon footprint calculation

[0036] Thermal carbon footprint accounting mainly focuses on carbon emissions from steam equipment such as drying and ironing during the production process. The steam consumption of the above equipment is calculated based on the amount of one batch (Q 蒸汽 ), the carbon emission of steam consumption is calculated according to formula (4):

[0037] C 3.2 =c 蒸汽 Q 蒸汽 / n……………………(4)

[0038] Where: C 3.2 ——Carbon footprint accounting data of electricity consumption in the socks processing process, in kgCO2e / pair;

[0039] c 蒸汽 ——Electricity carbon emission factor, unit is kgCO2e / kWh

[0040] Q 电 ——The amount of electricity purchased during the production of a batch of socks, in kWh

[0041] n——the output of a batch of socks, in pairs.

[0042] S3.3 Natural Gas Carbon Footprint Accounting

[0043] The carbon footprint of natural gas is mainly calculated based on the carbon emissions generated by the consumption of natural gas by some equipment during the production process. The steam consumption of the above equipment is calculated based on the amount of one batch (Q 天然气 ), the carbon emissions from natural gas consumption are calculated according to formula (5):

[0044] C 3.3 =c 天然气 Q 天然气 / n……………………(5)

[0045] Where: C 3.3 ——Carbon footprint accounting data of natural gas consumption in the socks processing process, in kgCO2e / pair;

[0046] c 蒸汽 ——Electricity carbon emission factor, unit is kgCO2e / kWh

[0047] Q 电 ——The amount of electricity purchased during the production of a batch of socks, in kWh

[0048] n——the output of a batch of socks, in pairs.

[0049] S3.4 Carbon footprint accounting for waste gas, waste and wastewater treatment

[0050] The carbon footprint accounting of waste gas, waste and wastewater treatment mainly refers to the carbon emissions of waste gas, waste and wastewater generated in the production process after being treated to meet the standards. The above carbon emissions are calculated according to formula (6):

[0051] C 3.4 =(c 废气 Q 废气 +c 废水 Q 废水 +c 废物 Q 废物 ) / n…………(6)

[0052] Where: C 3.4 ——Carbon footprint accounting data of socks exhaust gas, waste and wastewater consumption, in kgCO2e / pair;

[0053] c 废气 ——Exhaust gas carbon emission factor, unit is kgCO2e / Nm 3 ;

[0054] Q 废气 ——The amount of waste gas generated during the production of a batch of socks, in Nm 3 ;

[0055] c 废水 ——Wastewater carbon emission factor, in kgCO2e / kg;

[0056] Q 废水 ——The amount of wastewater generated during the production of a batch of socks, in kg;

[0057] c 废物 ——Waste carbon emission factor, in kgCO2e / kg;

[0058] Q 废物 ——The amount of waste generated during the production of a batch of socks, in kg;

[0059] n——the output of a batch of socks, in pairs.

[0060] S3.5 Carbon footprint accounting in the production stage

[0061] The carbon footprint accounting in the production stage is calculated according to formula (7):

[0062] C3=C 3.1 +C 3.2 +C 3.3 +C 3.4 ………(7)

[0063] Where: C3——Carbon footprint accounting data during the socks processing; unit: kgCO2e / pair;

[0064] C 3.1 ——Carbon footprint accounting data of electricity consumption in the socks processing process, in kgCO2e / pair;

[0065] C 3.2 ——Carbon footprint accounting data of electricity consumption in the socks processing process, in kgCO2e / pair;

[0066] C 3.3 ——Carbon footprint accounting data of natural gas consumption in the socks processing process, in kgCO2e / pair;

[0067] C 3.4 ——Carbon footprint accounting data of socks exhaust gas, waste and wastewater consumption, in kgCO2e / pair;

[0068] S4 Socks Product Carbon Footprint Accounting

[0069] The carbon footprint accounting of socks products includes the carbon footprint of raw material acquisition, the carbon footprint of raw material transportation and the carbon footprint of product production. Therefore, the carbon footprint accounting of socks products is calculated according to formula (8):

[0070] C=C1+C2+C3……………………(3)Wherein: C——Carbon footprint accounting data of socks products; unit is kgCO2e / pair;

[0071] C1——Carbon footprint accounting data of the socks raw material acquisition stage, in kgCO2e / pair;

[0072] C2——Carbon footprint accounting data of the transportation stage of raw materials of socks, in kgCO2e / pair;

[0073] C3——Carbon footprint accounting data of the raw material production stage of socks, in kgCO2e / pair;

[0074] Beneficial effects of the present invention:

[0075] 1. This method involves the carbon footprint accounting of the product throughout its entire life cycle, from cradle to gate, and the calculated data is more convincing.

[0076] 2. The products calculated by this method are accurate to the specific products and can be directly faced to all consumers.

[0077] 3. The data calculated by this method is real-time and traceable.

[0078] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0079] Figure 1 Calculate the boundary map for the carbon footprint of socks products;

[0080] Figure 2 Carbon footprint system diagram for socks products [Specific implementation method]

[0081] The present invention aims to provide a socks product carbon footprint accounting method and an implementation production system, comprising the following steps:

[0082] A1. Establish a carbon footprint model for socks products

[0083] A1.1 Carbon footprint accounting boundary of socks products. The boundary is as follows: Figure 1 As shown, it includes three parts: raw material acquisition stage, raw material transportation stage and product production stage.

[0084] A1.1.1 The raw material acquisition stage includes natural fibers, chemical fibers, printing and dyeing materials, packaging materials, etc. The carbon footprint of the raw material acquisition stage includes the carbon footprint of the raw materials used in a pair of socks from the mining of raw materials to the production and processing into raw material products.

[0085] A1.1.2 The carbon footprint of the raw material transportation stage refers to the carbon emissions generated when a pair of socks is transported from the raw material production area to the factory. The modes of transportation include: tram rail transportation, coal-fired freight rail transportation, air transportation, water transportation, diesel land transportation, gasoline land transportation, tram land transportation, etc.

[0086] A1.1.3 The carbon footprint accounting of the production stage includes carbon emissions from electricity consumption in the processes of yarn reeling, spinning, sewing, shaping, printing and dyeing, and packaging, carbon emissions from heat consumption in the ironing stage, carbon emissions from natural gas consumption of some equipment, carbon emissions from solid waste, waste gas and wastewater treatment processes, and carbon emissions from the on-site transportation stage. Since the production stage is mostly batch production, batch data statistics are used for accounting in this stage. A carbon emission factor database is established, and the main parameters include carbon emission factors for electricity, steam, natural gas, wastewater treatment, waste treatment, and waste gas treatment.

[0087] A1.2 Establish a carbon footprint accounting model library based on the raw materials, models and accounting boundaries of socks.

[0088] The carbon footprint accounting model should include the types and consumption of raw materials for different types of socks and the transportation distances of various raw materials.

[0089] A2. Establish a carbon footprint emission factor library

[0090] A2.1 Raw Materials Carbon Emission Factor Library

[0091] The raw materials of socks include natural fibers, chemical fibers, printing and dyeing materials, packaging materials, etc. The carbon footprint of the raw material acquisition stage includes the carbon footprint of the raw materials used in a pair of socks from the mining of raw materials to the production and processing of raw material products. According to the specifications and models of knitted socks, the raw material composition is confirmed and a raw material carbon emission factor library is established. The data can be queried from the literature, or the supplier can be asked to provide a carbon footprint report issued by a third party.

[0092] A2.2 Transport Carbon Emission Factor Library

[0093] The carbon emission factor library for the raw material transportation stage includes tram rail transportation, coal-fired freight rail transportation, air transportation, water transportation, diesel land transportation, gasoline land transportation, tram land transportation, etc. The carbon emission factors of various transportation modes can be confirmed based on literature and compliance databases.

[0094] A2.3 Carbon emission factor library for the production stage

[0095] The carbon emission factor library for the production stage includes carbon emission factors for electricity, heat, natural gas, and wastewater, waste gas, and waste materials. The above carbon emission factors can refer to relevant national laws, regulations, literature, and compliance databases.

[0096] A3. Collect data

[0097] The data collection stage mainly collects the output of a batch of products, the consumption of purchased electricity, natural gas consumption, the consumption of purchased heat, the amount of wastewater treatment, the amount of waste gas treatment and the amount of waste material treatment. The above data can be collected online or filled in manually.

[0098] A4. Produce carbon labels.

[0099] Combine the data collected by A1, A2 and A3 to calculate the carbon footprint, generate carbon footprint calculation data in real time, and record the calculation data on the carbon label in real time.

Claims

1. A carbon footprint accounting method for socks products, the boundaries of which include: (1) Raw material acquisition stage, (2) Raw material transportation stage, (3) Product production stage; The raw material acquisition stage includes sock raw materials, including natural fibers, chemical fibers, printing and dyeing materials, and packaging materials. The carbon footprint of the raw material acquisition stage includes the carbon footprint of the entire life cycle of the raw materials used in a pair of socks from raw material mining to production and processing into raw material products; The raw material transportation stage includes the carbon emissions generated when a pair of socks is transported from the raw material production area to the factory. The transportation methods include: tram rail transportation, coal-fired freight rail transportation, air transportation, water transportation, diesel land transportation, gasoline land transportation, tram land transportation, etc. A raw material database is established to confirm the suppliers and transportation methods, and the carbon emission factors of various transportation methods are confirmed based on literature data; The carbon footprint accounting of the production stage includes carbon emissions from electricity consumption in processes such as yarn reeling, weaving, sewing, shaping, printing and dyeing, and packaging, carbon emissions from heat consumption in stages such as ironing, carbon emissions from natural gas consumption in some equipment, carbon emissions from solid waste, waste gas and wastewater treatment processes, and carbon emissions from on-site transportation.

2. Carbon footprint accounting for raw material acquisition as claimed in claim 1 According to the specifications of knitted socks, the raw material composition is confirmed and a raw material carbon emission factor library is established. The data can be queried from the literature, or suppliers can be asked to provide a carbon footprint report issued by a third party. The carbon footprint data of the raw material acquisition stage is calculated according to formula (1): Where: C1——Carbon footprint accounting data of the socks raw material acquisition stage, unit is kgCO2e / pair; a i ——The amount of the i-th raw material, in kg / pair; b i ——Carbon emission factor of the ith raw material, in kgCO2e / kg.

3. Carbon footprint calculation for the raw material transportation stage as described in claim 1 Establish a raw material database, identify suppliers and transportation methods, and confirm the carbon emission factors of various transportation methods based on literature. The carbon footprint accounting of the raw material transportation stage is calculated according to formula (2): Where: C2——Carbon footprint accounting data of the transportation stage of socks raw materials, unit is kgCO2e / pair; ai——the amount of the i-th raw material, in kg / pair; ci——Carbon emission factor for transportation of the ith raw material, in kgCO2e / (kg*km) l i ——Transportation distance of the ith raw material, in km.

4. Carbon footprint accounting during the production phase as described in claim 1 The carbon footprint accounting of the production stage includes carbon emissions from electricity consumption in the processes of yarn reeling, spinning, sewing, shaping, printing and dyeing, and packaging, carbon emissions from heat consumption in the ironing stage, carbon emissions from natural gas consumption of some equipment, carbon emissions from solid waste, waste gas and wastewater treatment processes, and carbon emissions from the on-site transportation stage. Since the production stage is mostly batch production, batch data statistics are used in the accounting of this stage to establish a carbon emission factor database. The main parameters include electricity carbon emission factor, steam carbon emission factor, natural gas carbon emission factor, wastewater treatment carbon emission factor, waste treatment carbon emission factor, and waste gas treatment carbon emission factor. The above data can refer to the existing national policies, relevant literature, and a carbon emission factor database that meets the regulations. S3.1 Electricity Carbon Footprint Accounting The electricity consumption in the production stage mainly includes the electricity consumption of the equipment used in the yarn rewinding, spinning, shaping, embroidery (printing) and packaging processes, as well as the electrical equipment such as air compressors and air conditioners used for production activities. The electricity consumption of the above equipment is counted as one batch of electricity (Q 电 ), the carbon emissions from electricity consumption are calculated according to formula (3): C 3.1 =c 电 Q 电 / n……………………(3) Where: C 3.1 ——Carbon footprint accounting data of electricity consumption in the socks processing process, in kgCO2e / pair; c 电 ——Electricity carbon emission factor, unit is kgCO2e / kWh Q 电 ——The amount of electricity purchased during the production of a batch of socks, in kWh n——the output of a batch of socks, in pairs; S3.2 Thermal carbon footprint calculation Thermal carbon footprint accounting mainly focuses on the carbon emissions of steam equipment such as drying and ironing in the production process. The steam consumption of the above equipment is calculated based on the amount of one batch (Q 蒸汽 ), the carbon emission of steam consumption is calculated according to formula (4): C 3.2 =c 蒸汽 Q 蒸汽 / n……………………(4) Where: C 3.2 ——Carbon footprint accounting data of electricity consumption in the socks processing process, in kgCO2e / pair; c 蒸汽 ——Electricity carbon emission factor, unit is kgCO2e / kWh Q 电 ——The amount of electricity purchased during the production of a batch of socks, in kWh n——the output of a batch of socks, in pairs; S3.3 Natural Gas Carbon Footprint Accounting The carbon footprint of natural gas is mainly calculated based on the carbon emissions generated by the consumption of natural gas by some equipment during the production process. The steam consumption of the above equipment is calculated based on the amount of one batch (Q 天然气 ), the carbon emissions from natural gas consumption are calculated according to formula (5): C 3.3 =c 天然气 Q 天然气 / n……………………(5) Where: C 3.3 ——Carbon footprint accounting data of natural gas consumption in the socks processing process, in kgCO2e / pair; c 蒸汽 ——Electricity carbon emission factor, unit is kgCO2e / kWh Q 电 ——The amount of electricity purchased during the production of a batch of socks, in kWh n——the output of a batch of socks, in pairs; S3.4 Carbon footprint accounting for waste gas, waste and wastewater treatment The carbon footprint accounting of waste gas, waste and wastewater treatment mainly refers to the carbon emissions of waste gas, waste and wastewater generated in the production process after being treated to meet the standards. The above carbon emissions are calculated according to formula (6): C 3.4 =(c 废气 Q 废气 +c 废水 Q 废水 +c 废物 Q 废物 ) / n………(6) Where: C 3.4 ——Carbon footprint accounting data of socks exhaust gas, waste and wastewater consumption, in kgCO2e / pair; c 废气 ——Exhaust gas carbon emission factor, unit is kgCO2e / Nm 3 ; Q 废气 ——The amount of waste gas generated during the production of a batch of socks, in Nm 3 ; c 废水 ——Wastewater carbon emission factor, in kgCO2e / kg; Q 废水 ——The amount of wastewater generated during the production of a batch of socks, in kg; c 废物 ——Waste carbon emission factor, in kgCO2e / kg; Q 废物 ——The amount of waste generated during the production of a batch of socks, in kg; n——the output of a batch of socks, in pairs; S3.5 Carbon footprint accounting in the production stage The carbon footprint accounting in the production stage is calculated according to formula (7): C3=C 3.1 +C 3.2 +C 3.3 +C 3.4 ………(7) Where: C3——Carbon footprint accounting data during the socks processing; unit: kgCO2e / pair; C 3.1 ——Carbon footprint accounting data of electricity consumption in the socks processing process, in kgCO2e / pair; C 3.2 ——Carbon footprint accounting data of electricity consumption in the socks processing process, in kgCO2e / pair; C 3.3 ——Carbon footprint accounting data of natural gas consumption in the socks processing process, in kgCO2e / pair; C 3.4 ——Carbon footprint accounting data of socks exhaust gas, waste and wastewater consumption, in kgCO2e / pair; S4 Socks Product Carbon Footprint Accounting The carbon footprint accounting of socks products includes the carbon footprint of raw material acquisition, the carbon footprint of raw material transportation and the carbon footprint of product production. Therefore, the carbon footprint accounting of socks products is calculated according to formula (8): C=C1+C2+C3……………………(3) Where: C——Carbon footprint accounting data of socks products; unit is kgCO2e / pair; C1——Carbon footprint accounting data of the socks raw material acquisition stage, in kgCO2e / pair; C2——Carbon footprint accounting data of the transportation stage of raw materials of socks, in kgCO2e / pair; C3 - Carbon footprint accounting data for the raw material production stage of socks, in kgCO2e / pair.

5. As stated in claim 1, a carbon footprint accounting system for sock products is established based on the carbon footprint accounting method for sock products, including (1) establishing a carbon footprint accounting model for sock products, (2) establishing a carbon footprint accounting factor library for sock products, (3) data collection, and (4) producing product carbon labels.

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