Early warning method and system for carbon footprint of raw magnesium product

Abstract

The invention discloses an early warning method and system for a carbon footprint of an original magnesium product. The method comprises the following steps: setting a collection period of carbon footprint data; constructing a carbon footprint database based on the acquisition period; calculating the carbon footprint of the product based on the carbon footprint database; when the carbon footprint of the product exceeds a threshold value, an alarm is given. The data collection period for calculating the carbon footprint of the product is solidified by setting the data collection time, the carbon footprint of the product can be quantified conveniently, and the pre-warning system of the invention improves the transparency and traceability of the carbon emission intensity of the enterprise by converting the raw material and energy consumption data in the original magnesium production enterprise into the carbon emission data. In addition, through statistical analysis and early warning of the carbon footprint of the original magnesium production enterprise product, an emission reduction strategy can be made in a targeted manner according to a carbon emission exceeding process, and the carbon emission of the enterprise is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon emission from raw magnesium production, and in particular to an early warning method and system for carbon footprint of raw magnesium products. Background Art

[0002] As the lightest metal structural material, magnesium has many advantages such as low density, resistance and strong shielding performance. It has extremely important application value and broad application prospects in the aviation, aerospace, automobile and other industries. But at the same time, the magnesium smelting industry is an energy-intensive industry with high energy consumption. A large amount of greenhouse gases will be produced in the process of magnesium production. With the proposal of my country's "carbon peak and carbon neutrality" goals, the contradiction between the current status of high energy consumption and high pollution processes and the increasingly tightened energy-saving and environmental protection policies has become increasingly prominent, and my country's magnesium smelting industry has presented many opportunities and challenges.

[0003] At present, many raw magnesium production companies have begun to incorporate sustainable development into their corporate development plans. In terms of carbon emissions, they are also committed to calculating the carbon footprint of raw magnesium products. However, most of them are just superficial, with imprecise calculations, and no dynamic carbon footprint detection and early warning system has been formed. Summary of the invention

[0004] In order to solve the technical problems in the above background, the present invention provides an early warning method for the carbon footprint of raw magnesium products, comprising the following steps:

[0005] Set the collection period of carbon footprint data;

[0006] Based on the collection cycle, a carbon footprint database is constructed;

[0007] Calculating the carbon footprint of a product based on the carbon footprint database;

[0008] When the carbon footprint of the product exceeds a threshold, an alarm is issued.

[0009] Preferably, the step of constructing the carbon footprint database includes: collecting and collating activity data of the raw magnesium production process within the collection period, and the activity data includes: energy consumption of the production process, usage of raw and auxiliary materials of the product, amount of waste generated and transportation distance of raw and auxiliary materials of the product.

[0010] Preferably, the energy consumption in the production process includes: the total amount of coal gas used in production, the total amount of diesel used in production and the total amount of electricity used in production; the usage of the raw and auxiliary materials of the products includes: the net consumption of dolomite, the net consumption of ferrosilicon, the net consumption of flux, and the net consumption of fluorite powder; the amount of waste generated includes: the net generation of reducing slag; the transportation distance of the raw and auxiliary materials of the products includes: the transportation distance of dolomite, the transportation distance of ferrosilicon, the transportation distance of flux, and the transportation distance of fluorite powder, in addition to this, it also includes the statistical production of raw magnesium within a fixed period.

[0011] Preferably, the method for calculating the carbon footprint of the product comprises:

[0012] E 企业 =E 回转窑 +E 配料制球 +E 热真空还原 +E 精炼 -E 副产品 Among them, E 企业 Indicates the total carbon footprint generated by the enterprise; E 回转窑 It represents the total carbon emission of the rotary kiln process within a fixed period; E 配料制球 It represents the total carbon emission of the batching and pelletizing process within a fixed period; E 热真空还原 It represents the total carbon emission of the thermal vacuum reduction process in a fixed period; E 精炼 Represents the total carbon emissions of the refining process within a fixed period; E 副产品 The carbon emissions that can be deducted after the by-product reduced slag is sold to cement plants.

[0013] Preferably, the method for calculating the carbon footprint of the product further comprises:

[0014] E 工序 =E 原材料生产 +E 原材料运输 +E 过程 +E 热 +E 柴油 +E 电 Among them, E 工序 represents the carbon emissions of each process of the primary magnesium production enterprise; represents E 原材料生产 represents the carbon emissions generated during the raw material production stage, E 原材料运输 It represents the carbon emissions generated during the transportation of raw materials from manufacturers to primary magnesium enterprises, E 过程 Represents the carbon emissions of the process, E 热 represents the carbon emissions from purchased heat consumption, E 柴油 Indicates the carbon emissions from diesel consumed for transportation within the factory, E 电 Indicates the carbon emissions from purchased electricity consumption.

[0015] Preferably, it is used to calculate the carbon emissions of each process of the primary magnesium production enterprise E 工序 Any parameter of a resource that is calculated using activity data and emission factors.

[0016] The present invention also provides an early warning system for the carbon footprint of raw magnesium products, the system is used to implement the above method, including: a setting module, a construction module, a calculation module and an alarm module;

[0017] The collection module is used to set the collection period of carbon footprint data;

[0018] The construction module is used to construct a carbon footprint database based on the collection cycle;

[0019] The calculation module is used to calculate the carbon footprint of the product based on the carbon footprint database;

[0020] The alarm module is used to issue an alarm when the carbon footprint of the product exceeds a threshold.

[0021] Preferably, the workflow of the building module includes: collecting and organizing activity data in the raw magnesium production process within the collection period, and the activity data includes: energy consumption in the production process, usage of raw and auxiliary materials of the product, amount of waste generated and transportation distance of raw and auxiliary materials of the product.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] The present invention solidifies the data collection cycle used to calculate the product carbon footprint by setting the data collection time, which is convenient for quantifying the product carbon footprint. The early warning system of the present invention improves the transparency and traceability of the carbon emission intensity of the enterprise by converting the raw material and energy consumption data in the primary magnesium production enterprise into carbon emission data. In addition, through the statistical analysis and early warning of the carbon footprint of the products of the primary magnesium production enterprise, it is possible to formulate emission reduction strategies for the processes with excessive carbon emissions and effectively reduce the carbon emissions of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 A schematic diagram of a method flow chart of an embodiment of the present invention;

[0026] Figure 2 It is a framework diagram of the method flow of an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Embodiment 1

[0030] like Figure 1 FIG. 1 is a schematic diagram of a method flow chart of an embodiment of the present invention, and the steps include:

[0031] S1. Set the collection period of carbon footprint data.

[0032] The time range for collecting product activity data is set to a reasonable period value, and the carbon footprint value of the products of the raw magnesium production enterprise within a period is evaluated. Considering that when the collection period is set to a short period, the data collection and statistics are frequent, the workload is large, and it is not easy to achieve. When the collection period is set to a long period, the time span of the activity data obtained is large, and it cannot accurately reflect the changing trend of the carbon footprint of the enterprise's products at a certain stage. Therefore, this embodiment sets the collection period to one month, and marks it as 1, 2...n in sequence.

[0033] S2. Build a carbon footprint database based on the collection cycle.

[0034] Collect and organize the activity data of enterprises in the process of raw magnesium production within the collection period. The activity data include: energy consumption in the production process, usage of raw and auxiliary materials of the product, amount of waste generated and transportation distance of raw and auxiliary materials of the product.

[0035] The unit product energy consumption in the production process includes the unit product usage of coal gas in the thermal vacuum reduction and refining processes, which are marked as Q m1 , Q m2 The unit product usage of diesel in the rotary kiln, batching and pelletizing, thermal vacuum reduction, and refining processes are marked as Q c1 , Q c2 , Q c3 , Q c4 The unit product usage of electricity in the rotary kiln, batching and pelletizing, thermal vacuum reduction, and refining processes is marked as Q d1 , Q d2 , Q d3 , Q d4 The unit product usage of raw and auxiliary materials includes the net unit product consumption of dolomite and coal powder in the rotary kiln process, which are marked as Q b , Q f ; The net consumption per unit of ferrosilicon and fluorite powder in the batching and ball making process is marked as Q g , Q y ; Net consumption per unit product of flux in the refining process Q r The transportation distance of raw and auxiliary materials includes the transportation distance of dolomite, the transportation distance of coal powder, the transportation distance of ferrosilicon, the transportation distance of fluorite powder and the transportation distance of flux, which are marked as S b , Sf , S g , S y and S r .

[0036] S3. Calculate the product carbon footprint based on the carbon footprint database.

[0037] Calculate the carbon footprint of enterprise products: retrieve various activity data collected in the database, collect corresponding carbon emission factors, calculate the carbon emissions of each process in the production of raw magnesium, and summarize the carbon footprint of the products of raw magnesium production enterprises within a cycle, that is, The detailed process is as follows:

[0038] Carbon footprint of raw magnesium production enterprises 企业 ,Right now:

[0039] E 企业 =E 回转窑 +E 配料制球 +E 热真空还原 +E 精炼 -E 副产品 Among them, E 企业 Indicates the total carbon footprint generated by the enterprise; E 回转窑 It represents the total carbon emission of the rotary kiln process within a fixed period; E 配料制球 It represents the total carbon emission of the batching and pelletizing process within a fixed period; E 热真空还原 It represents the total carbon emission of the thermal vacuum reduction process in a fixed period; E 精炼 Represents the total carbon emissions of the refining process within a fixed period; E 副产品 The carbon emissions that can be deducted after the by-product reduced slag is sold to cement plants.

[0040] The raw magnesium production enterprises include rotary kiln, batching and pelletizing, thermal vacuum reduction, refining and other processes. The carbon emission calculation expressions are as follows:

[0041] E 回转窑 =Q b ×(EF 白云石开采 +EF 白云石燃烧 +S b ×EF 运输 )+Q f (EF 煤粉生产 +EF 煤粉燃烧 +S f ×EF 运输 )+Q d1 ×EF 电 +Q c1 ×EF 柴

[0042] E 配料制球 =Q g ×(EF 硅铁+S g ×EF 运输 )+Q y (EF 萤石粉 +S y ×EF 运输 )+Q d2 ×EF 电 +Q c2 ×EF 柴

[0043] E 热真空还原 =Q m1 ×EF 煤气 +Q d3 ×EF 电 +Q c3 ×EF 柴

[0044] E 精炼 =Q r ×(EF 溶剂 +S r ×EF 运输 )+Q m2 ×EF 煤气 +Q d4 ×EF 电 +Q c4 ×EF 柴 Among them, EF 白云石开采 EF 白云石燃烧 are the carbon emission factors of dolomite in the mining stage and the combustion stage; EF 煤粉生产 EF 煤粉燃烧 are the carbon emission factors of pulverized coal in the production stage and combustion stage; EF 硅铁 EF 莹石粉 EF 溶剂 are the carbon emission factors of ferrosilicon, fluorite powder and solvent respectively; EF 运输 is the transport emission factor for medium and heavy trucks; EF 电 is the electricity emission factor; EF 柴 is the diesel emission factor; EF 煤气 is the carbon emission factor of coal gas.

[0045] Calculate the carbon emissions E of each process of primary magnesium production enterprises 工序 The methods include:

[0046] E 工序 =E 原材料生产 +E 原材料运输 +E 过程 +E 热 +E 柴油 +E 电

[0047] Among them, E 工序represents the carbon emissions of each process of the primary magnesium production enterprise; represents E 原材料生产 represents the carbon emissions generated during the raw material production stage, E 原材料运输 It represents the carbon emissions generated during the transportation of raw materials from manufacturers to primary magnesium enterprises, E 过程 Represents the carbon emissions of the process, E 热 represents the carbon emissions from purchased heat consumption, E 柴油 Indicates the carbon emissions from diesel consumed for transportation within the factory, E 电 Indicates the carbon emissions from purchased electricity consumption.

[0048] In this embodiment, when calculating the carbon emissions E of each process of the primary magnesium production enterprise, 工序 When any parameter is used, the activity data and emission factors of that parameter are used to calculate the emission factor, with E 原材料运输 Take this as an example:

[0049] E 原材料生产 =AD×EF

[0050] Among them, AD is the activity data of unit product, and EF is the default value of carbon emission.

[0051] S4. When the carbon footprint of a product exceeds a threshold, an alarm is issued.

[0052] Through investigation, the thresholds λ1 and λ2 are set according to the actual situation. In this embodiment, based on the data in the greenhouse gas emission coefficient library of China's products throughout the life cycle, it can be seen that the semi-life cycle product carbon footprint of raw magnesium from cradle to gate is 28.673 tons; therefore, the thresholds λ1 and λ2 are set to 25 tons and 28 tons respectively. If the Swiss Ecoinvent3.10 database is used as a basis, the semi-life cycle product carbon footprint of raw magnesium from cradle to gate is 26.343 tons, then the thresholds λ1 and λ2 are set to 23 tons and 26 tons respectively.

[0053] When E in a cycle 企业 <λ1, it means that the carbon footprint of raw magnesium products in this period is not abnormal; when λ1≤E 企业 When λ<λ2, the system issues a yellow warning signal, indicating that the carbon footprint of the current product is about to exceed the maximum limit λ2. It is necessary to check the specific process that exceeds the limit, analyze the reasons, and formulate reasonable carbon reduction measures. 企业 When ≥λ2, the system issues a red warning signal, indicating that the carbon footprint of the raw magnesium product in this period is seriously abnormal and production needs to be stopped, and adjustments need to be made in process technology and energy structure.

[0054] After the alarm module sounds an alarm, corresponding changes are made according to the different warning signals of the product carbon footprint. Specifically, when a yellow warning signal is received, the specific process that exceeds the standard is checked, and reasonable carbon reduction measures are formulated and implemented until the alarm is lifted; when a red warning signal is received, the overall consideration is taken into account, and carbon reduction work such as process improvement and energy structure adjustment is carried out in a timely manner until the alarm is lifted. The overall method idea is as follows Figure 2 shown.

[0055] Embodiment 2

[0056] The present invention also provides an early warning system for the carbon footprint of raw magnesium products, comprising: a setting module, a construction module, a calculation module and an alarm module; the collection module is used to set the collection period of carbon footprint data; the construction module is used to build a carbon footprint database based on the collection period; the calculation module is used to calculate the carbon footprint of the product based on the carbon footprint database; the alarm module is used to issue an alarm when the carbon footprint of the product exceeds a threshold.

[0057] The following will describe in detail how the present invention solves the technical problems in practical work in conjunction with this embodiment.

[0058] First, the module sets the time range for collecting product activity data to a reasonable period value, and evaluates the carbon footprint value of the products of the raw magnesium production enterprise within a period. Considering that when the collection period is set to a short period, the data collection and statistics are frequent, the workload is large, and it is not easy to implement. When the collection period is set to a long period, the time span of the activity data obtained is large, and it cannot accurately reflect the changing trend of the carbon footprint of the enterprise's products at a certain stage. Therefore, this embodiment sets the collection period to one month, and marks it as 1, 2...n in sequence.

[0059] The collection module is then used to collect and organize the company's activity data during the collection cycle during the raw magnesium production process. The activity data include: energy consumption in the production process, the amount of raw and auxiliary materials used in the product, the amount of waste generated, and the transportation distance of the raw and auxiliary materials of the product.

[0060] Among them, the energy consumption in the production process includes: the total amount of coal gas used in production, the total amount of diesel used in production and the total amount of electricity used in production; the usage of raw and auxiliary materials for products includes: the net consumption of dolomite, the net consumption of ferrosilicon, the net consumption of flux and the net consumption of fluorite powder; the amount of waste generated includes: the net generation of reducing slag; the transportation distance of raw and auxiliary materials for products includes: the transportation distance of dolomite, the transportation distance of ferrosilicon, the transportation distance of flux and the transportation distance of fluorite powder. In addition, the production of raw magnesium within a fixed statistical period is also included.

[0061] The calculation module is used to calculate the carbon footprint of the product, mainly to calculate the carbon emissions of each process of the raw magnesium production enterprise. 工序 and the total carbon footprint E generated by the enterprise企业 Specifically, in this embodiment, the total carbon footprint E generated by the enterprise is calculated 企业 The calculation expression is as follows:

[0062] E 企业 =E 回转窑 +E 配料制球 +E 热真空还原 +E 精炼 -E 副产品

[0063] Among them, E 企业 Indicates the total carbon footprint generated by the enterprise; E 回转窑 It represents the total carbon emission of the rotary kiln process within a fixed period; E 配料制球 It represents the total carbon emission of the batching and pelletizing process within a fixed period; E 热真空还原 It represents the total carbon emission of the thermal vacuum reduction process in a fixed period; E 精炼 Represents the total carbon emissions of the refining process within a fixed period; E 副产品 The carbon emissions that can be deducted after the by-product reduced slag is sold to cement plants.

[0064] Calculate the carbon emissions E of each process of primary magnesium production enterprises 工序 The methods include:

[0065] E 工序 =E 原材料生产 +E 原材料运输 +E 过程 +E 热 +E 柴油 +E 电

[0066] Among them, E 工序 represents the carbon emissions of each process of the primary magnesium production enterprise; represents E 原材料生产 represents the carbon emissions generated during the raw material production stage, E 原材料运输 It represents the carbon emissions generated during the transportation of raw materials from manufacturers to primary magnesium enterprises, E 过程 Represents the carbon emissions of the process, E 热 represents the carbon emissions from purchased heat consumption, E 柴油 Indicates the carbon emissions from diesel consumed for transportation within the factory, E 电 Indicates the carbon emissions from purchased electricity consumption.

[0067] In this embodiment, when calculating the carbon emissions E of each process of the primary magnesium production enterprise, 工序 When any parameter is used, the activity data and emission factors of that parameter are used to calculate the emission factor, with E 原材料运输 Take this as an example:

[0068] E 原材料生产 =AD×EF

[0069] Among them, AD is the activity data of unit product, and EF is the default value of carbon emission.

[0070] Finally, when the product carbon footprint exceeds the threshold, the alarm module issues an alarm.

[0071] Through investigation, the thresholds λ1 and λ2 are set according to the actual situation. In this embodiment, based on the data in the greenhouse gas emission coefficient library of China's products throughout the life cycle, it can be seen that the semi-life cycle product carbon footprint of raw magnesium from cradle to gate is 28.673 tons; therefore, the thresholds λ1 and λ2 are set to 25 tons and 28 tons respectively. If the Swiss Ecoinvent3.10 database is used as a basis, the semi-life cycle product carbon footprint of raw magnesium from cradle to gate is 26.343 tons, then the thresholds λ1 and λ2 are set to 23 tons and 26 tons respectively.

[0072] When E in a cycle 企业 <λ1, it means that the carbon footprint of raw magnesium products in this period is not abnormal; when λ1≤E 企业 When λ<λ2, the system issues a yellow warning signal, indicating that the carbon footprint of the current product is about to exceed the maximum limit λ2. It is necessary to check the specific process that exceeds the limit, analyze the reasons, and formulate reasonable carbon reduction measures. 企业 When ≥λ2, the system issues a red warning signal, indicating that the carbon footprint of the raw magnesium product in this period is seriously abnormal and production needs to be stopped, and adjustments need to be made in process technology and energy structure.

[0073] After the alarm module sounds an alarm, corresponding changes are made according to the different warning signals of the product carbon footprint. Specifically, when a yellow warning signal is received, the specific process that exceeds the standard is checked, and reasonable carbon reduction measures are formulated and implemented until the alarm is lifted; when a red warning signal is received, the overall consideration is taken into account, and carbon reduction work such as process improvement and energy structure adjustment is carried out in a timely manner until the alarm is lifted.

[0074] The embodiments described above are only descriptions of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for early warning of carbon footprint of raw magnesium products, characterized in that the steps include: Set the collection period of carbon footprint data; Based on the collection cycle, a carbon footprint database is constructed; Calculating the product carbon footprint based on the carbon footprint database; When the carbon footprint of the product exceeds a threshold, an alarm is issued.

2. The early warning method for carbon footprint of raw magnesium products according to claim 1, characterized in that: The step of constructing the carbon footprint database includes: collecting and collating activity data in the raw magnesium production process within the collection period, and the activity data includes: energy consumption in the production process, usage of raw and auxiliary materials of the product, amount of waste generated and transportation distance of raw and auxiliary materials of the product.

3. The early warning method for carbon footprint of raw magnesium products according to claim 2, characterized in that: The energy consumption in the production process includes: the total amount of coal gas used in production, the total amount of diesel used in production and the total amount of electricity used in production; the usage of raw and auxiliary materials for the products includes: the net consumption of dolomite, the net consumption of ferrosilicon, the net consumption of flux and the net consumption of fluorite powder; the amount of waste generated includes: the net generation of reducing slag; the transportation distance of the raw and auxiliary materials for the products includes: the transportation distance of dolomite, the transportation distance of ferrosilicon, the transportation distance of flux and the transportation distance of fluorite powder. In addition, the production of raw magnesium within a fixed statistical period is also included.

4. The early warning method for carbon footprint of raw magnesium products according to claim 1, characterized in that: The method for calculating the carbon footprint of the product includes: AND 企业 =And 回转窑 +E 配料制球 +E 热真空还原 +E 精炼 -AND 副产品 Among them, E 企业 Indicates the total carbon footprint generated by the enterprise; E 回转窑 It represents the total carbon emission of the rotary kiln process within a fixed period; E 配料制球 It represents the total carbon emission of the batching and pelletizing process within a fixed period; E 热真空还原 It represents the total carbon emission of the thermal vacuum reduction process in a fixed period; E 精炼 Represents the total carbon emissions of the refining process within a fixed period; E 副产品 The carbon emissions that can be deducted after the by-product reduced slag is sold to cement plants.

5. The early warning method for carbon footprint of raw magnesium products according to claim 4, characterized in that: The method for calculating the carbon footprint of the product also includes: AND 工序 =And 原材料生产 +E 原材料运输 +E 过程 +E 热 +E 柴油 +E 电 Among them, E 工序 represents the carbon emissions of each process of the primary magnesium production enterprise; represents E 原材料生产 represents the carbon emissions generated during the raw material production stage, E 原材料运输 It represents the carbon emissions generated during the transportation of raw materials from manufacturers to primary magnesium enterprises, E 过程 Represents the carbon emissions of the process, E 热 represents the carbon emissions from purchased heat consumption, E 柴油 Indicates the carbon emissions from diesel consumed for transportation within the factory, E 电 Indicates the carbon emissions from purchased electricity consumption.

6. The early warning method for carbon footprint of raw magnesium products according to claim 5, characterized in that: Used to calculate the carbon emissions E of each process of primary magnesium production enterprises 工序 Any parameter of a resource that is calculated using activity data and emission factors.

7. An early warning system for the carbon footprint of raw magnesium products, the system being used to implement the method according to any one of claims 1 to 6, characterized in that: include: Setting module, building module, calculation module and alarm module; The collection module is used to set the collection period of carbon footprint data; The construction module is used to construct a carbon footprint database based on the collection cycle; The calculation module is used to calculate the carbon footprint of the product based on the carbon footprint database; The alarm module is used to issue an alarm when the carbon footprint of the product exceeds a threshold.

8. The early warning method for carbon footprint of raw magnesium products according to claim 6, characterized in that: The workflow of the building module includes: collecting and organizing activity data in the raw magnesium production process within the collection cycle, and the activity data includes: energy consumption in the production process, usage of raw and auxiliary materials of the product, amount of waste generated and transportation distance of raw and auxiliary materials of the product.

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