Method and system for evaluating material energy metabolism and waste flow efficiency of regional scale industry

Abstract

The invention discloses a regional scale industrial material energy metabolism and waste flow efficiency assessment method and system, and belongs to the field of industrial ecology. The evaluation method comprises the following steps: determining a geographic boundary, a time boundary and a scale boundary corresponding to a target area; classifying enterprises related to the material energy flow in the target area; obtaining material flow account data of each enterprise, merging input items and output items of the enterprises of the same type to obtain subsystems corresponding to the enterprise types, and constructing a metabolic network of the target area; determining an accounting formula of the metabolic network according to input-output balance in the target area; the accounting formula comprises an element tracking equation and a system conservation equation; and calculating the input-output metabolic quantity and the waste metabolic efficiency of the target area according to the material flow account data and the accounting formula. Main enterprises of material circulation and energy input in a specific area can be accurately divided, and a material energy metabolism map oriented to solid waste whole-process optimization management is constructed.

Description

Technical Field

[0001] The present invention belongs to the field of industrial ecology, and more specifically, relates to an evaluation method and system for industrial material and energy metabolism and waste flow efficiency at the regional scale. Background Art

[0002] Regions are important spatial carriers for promoting economic development and key elements for driving green and low-carbon development in various fields. However, traditional regions generally have resource-intensive or heavy chemical industries as their leading industries, consuming large amounts of resources and energy, and having relatively prominent solid waste and other environmental problems.

[0003] Current waste management and resource recycling measures adopted in regions mostly focus on local optimization and end treatment of production activities. However, in the face of the current situation of diversified industrial structures, intertwined material and energy flows, and numerous solid waste generation and transformation links within a region, it is difficult to fundamentally solve the problems of resource waste and environmental pollution by starting from a single link. Therefore, to achieve the green transformation of a region, it is necessary to deeply analyze the specific flow paths of materials, energy, and waste and their metabolic efficiency, clarify the main sources of solid waste generation and metabolic bottlenecks, identify key control nodes and priority optimization areas, clarify the conversion relationships of materials and energy between different economic activities, and implement differentiated waste reduction and efficiency improvement strategies for sub-regions with different industrial types, solid waste types, and pollution characteristics.

[0004] Existing regional waste reduction and resource recovery models and methods mainly rely on traditional efficiency indicators and resource recovery rates from a macro perspective to evaluate waste reduction effects, such as the comprehensive utilization rate of solid waste, resource recycling ratio, etc. Although these indicators can reflect a certain resource utilization situation, they lack in-depth analysis and precise quantification of the material and energy metabolism and waste flow processes, are difficult to accurately evaluate the long-term impact of solid waste emissions on the ecosystem and resource recycling, and are difficult to effectively track the specific flow paths of materials, energy, and waste and the mutual relationships between economic entities in a complex system such as a region, thus limiting the ability to systematically identify the main sources of solid waste and metabolic obstacles. Summary of the Invention

[0005] Aiming at the deficiencies of the related technologies, the purpose of the present invention is to provide an evaluation method and system for industrial material and energy metabolism and waste flow efficiency at the regional scale, aiming to solve the problem that it is difficult to accurately quantify and track the material and energy metabolism and waste metabolism of enterprises in a specific region.

[0006] To achieve the above purpose, in the first aspect, the present invention provides an evaluation method for industrial material and energy metabolism and waste flow efficiency at the regional scale, including:

[0007] S1. Determine the geographical boundary, time boundary, and scale boundary corresponding to the target area; the scale boundary is enterprises above a certain scale.

[0008] S2. Classify the enterprises related to material and energy flow within the target area.

[0009] S3. Obtain the material flow account data of each enterprise, respectively merge the material and energy input items and output items of enterprises of the same type, obtain the subsystems corresponding to each enterprise type, establish the material, energy, and waste flow connections between enterprises, and construct the metabolic network of the target area; the subsystems include input, output, and enterprise type.

[0010] S4. Determine the accounting formula of the metabolic network according to the input-output balance of all elements of all enterprises in the target area; the accounting formula includes an element tracking equation and a system conservation equation.

[0011] S5. Calculate the input-output metabolism amount and waste metabolism efficiency of the target area according to the material flow account data and the accounting formula.

[0012] Optionally, the material flow account data includes: enterprise basic information, energy input, main raw and auxiliary material input, other input, product output, and waste discharge situation.

[0013] The energy input includes energy in non-material form and energy in material form.

[0014] The main raw and auxiliary material input includes the name, type, consumption amount, and source of main raw materials and auxiliary materials.

[0015] The other input includes air and water.

[0016] The product output includes the name, type, output amount, and destination of the product.

[0017] The waste discharge includes the name of the waste, waste category, discharge amount, waste destination, and utilization and treatment and disposal methods.

[0018] Optionally, the expression of the element tracking equation is:

[0019]

[0020] Where is the flow rate of the characteristic element to be obtained, Element in is the mass of the material or energy, Element content is the content of the characteristic element in the material, and P is the purity of the material or energy.

[0021] The expression of the system conservation equation is:

[0022]

[0023] Among them, ME tol is the system input-output metabolism; Input ΦW and Output ΦW are the material input and output respectively, and Input ΦE and Output ΦE are the energy input and output respectively. The subscripts s, g, and k represent the input, output, and stock categories respectively.

[0024] Optionally, when calculating the input-output metabolism of a single substance or a specific element, the element tracking equation is adopted;

[0025] When calculating the input-output metabolism of a specific subsystem, the system conservation equation is adopted.

[0026] Optionally, the target area includes a city, a development zone, an industrial park, or a solid waste industrial park;

[0027] The geographical boundary is the administrative boundary corresponding to the target area;

[0028] The time boundary is at least 1 natural year.

[0029] Optionally, classifying the enterprises in the target area includes:

[0030] Classifying the enterprises in the target area according to the major classification principle of the "National Economic Industry Classification (GB / T 4754-2017)".

[0031] Optionally, the input of the subsystem includes energy input, raw material and auxiliary material input, and other inputs;

[0032] The output of the subsystem includes the output of material products and energy products, the emission of solid waste, and other emissions.

[0033] In a second aspect, the present invention also provides an accounting system for the material and energy metabolism and waste flow efficiency at the regional scale, including:

[0034] A regional module, used to determine the geographical boundary, time boundary, and scale boundary corresponding to the target area; the scale boundary is enterprises above a certain scale;

[0035] An enterprise module, used to classify the enterprises related to material and energy flow in the target area;

[0036] A data module, configured to obtain the material flow account data of each enterprise, respectively merge the material and energy input items and output items of enterprises with the same type, obtain subsystems corresponding to each enterprise type, establish the material, energy, and waste flow connections among enterprises, and construct the metabolic network of the target region; the subsystems include inputs, outputs, and enterprise types.

[0037] An accounting module, configured to determine the accounting formula of the metabolic network according to the input-output balance of all elements of all enterprises in the target region; the accounting formula includes an element tracking equation and a system conservation equation.

[0038] A calculation result module, configured to calculate the input-output metabolism amount and waste metabolism efficiency of the target region according to the material flow account data and the accounting formula.

[0039] In a third aspect, the present invention further provides an electronic device, including a processor, a memory, and a communication bus; the communication bus is used to connect the processor and the memory; the processor is configured to execute a computer program stored in the memory to implement the method according to any one of the first aspects.

[0040] In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, and the computer program is used to cause a computer to execute the method according to any one of the first aspects.

[0041] Through the above technical solutions conceived by the present invention, compared with the prior art, the following beneficial effects can be achieved:

[0042] 1. The present invention provides a method and system for evaluating the material and energy metabolism and waste flow efficiency of industries at the regional scale. According to the material, energy, and waste flow connections among enterprises, a metabolic network of the target region is constructed, and an element tracking equation and a system conservation equation are used as accounting formulas, thereby constructing a quantitative model for the material and energy metabolism and waste flow efficiency of industries within a specific region, identifying key waste-producing enterprises related to material consumption, energy conversion, and solid waste emissions in the region and their final destinations, clearly sorting out the flow paths of materials, energy, and waste in each enterprise and calculating the specific flow rates. It solves the problem that it is difficult to accurately quantify and track the material and energy metabolism and waste metabolism of enterprises within a specific region. It realizes the accurate accounting of the material and energy metabolism and waste flow conditions within a specific time and space range in the region, helps to promote the region to gradually move towards the refinement of "zero-waste" management of waste, and accelerates the realization of efficient resource utilization and the construction of the "zero-waste" goal.

[0043] 2. The present invention provides a method and system for evaluating the material and energy metabolism and waste flow efficiency at the regional scale. By analyzing the material and energy inputs and outputs of enterprises of the same type under the selected target regional scale, a metabolic network of the target region is constructed, filling the gaps and deficiencies in the method system for simulating the material and energy metabolism and calculating the efficiency of the waste flow process at the regional scale in China (such as cities, industrial parks, and development zones, etc.). It can accurately divide the main enterprises of material circulation and energy input within a specific region, and construct a material and energy metabolism map for the whole-process optimization management of solid waste. This method fully considers the diversity of the material and energy metabolism systems at the regional macro level and micro level and the complexity in the waste flow process, establishes the material, energy, and waste flow connections among enterprises within the region, and can directly calculate the material flow and energy flow of each enterprise in the metabolic network and the input-output metabolism amount of the system as a whole. It provides an effective analysis tool for relevant departments and personnel to deeply understand the material and energy flow relationships among enterprises within the region, identify the main solid waste generation sources, and prioritize waste reduction control regions.

[0044] 3. The present invention provides a method and system for evaluating the material and energy metabolism and waste flow efficiency at the regional scale. The technical solution of the present invention also involves the direct calculation of the solid waste treatment capacity in a complex industrial environment, making up for the deficiency in other material metabolism evaluation methods that cannot directly quantify the solid waste metabolism amount and simultaneously consider the environmental carrying capacity, and providing strong support for the sustainable development and efficient utilization of resources in the region. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a schematic flow chart of a method for evaluating the material and energy metabolism and waste flow efficiency at the regional scale provided by the present invention;

[0046] Figure 2 is a structural diagram of the material and energy metabolism in an industrial park provided by the present invention;

[0047] Figure 3 is a Sankey diagram of the disposal flow direction of solid waste in an industrial park provided by the present invention;

[0048] Figure 4 is the distribution of solid waste generation industries in an industrial park provided by the present invention;

[0049] Figure 5 is the practical operation interface of the application software of a method for evaluating the material and energy metabolism and waste flow efficiency at the regional scale provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0050] To make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0051] The following describes the content involved in the above embodiments in conjunction with a preferred embodiment.

[0052] Embodiment 1

[0053] The present invention provides a method for evaluating the material and energy metabolism and waste flow efficiency at the regional scale, including:

[0054] S1. Determine the geographical boundary, time boundary and scale boundary corresponding to the target area; the scale boundary is enterprises above a certain scale;

[0055] S2. Classify the enterprises related to material and energy flow in the target area;

[0056] S3. Obtain the material flow account data of each enterprise, respectively merge the material and energy input items and output items of enterprises with the same type, obtain the subsystems corresponding to each enterprise type, establish the material, energy and waste flow connections between enterprises, and construct the metabolic network of the target area; the subsystem includes input, output and enterprise type;

[0057] S4. Determine the accounting formula of the metabolic network according to the input-output balance of all elements of all enterprises in the target area; the accounting formula includes an element tracking equation and a system conservation equation;

[0058] S5. Calculate the input-output metabolism amount and waste metabolism efficiency of the target area according to the material flow account data and the accounting formula.

[0059] The technical solution of the present invention defines the time and geographical scope of a specific area and coordinates with the administrative boundary, and establishes an input-output list data set (library) at the enterprise level by industry from bottom to top; identifies the enterprises above a certain scale related to material and energy metabolism and waste generation in the area, and preferentially constructs a material flow, energy flow, and waste flow quantification accounting model at the regional industrial scale based on the system conservation equation method, and uses a Sankey diagram to visually represent the material, energy, and solid waste metabolism characteristics of the region, forming a systematic evaluation method for the material, energy, and waste flow intensity and efficiency of the entire region.

[0060] Optionally, the target area includes a city, a development zone, an industrial park or a solid waste industrial park;

[0061] The geographical boundary is the administrative boundary corresponding to the target area;

[0062] The time boundary is at least 1 natural year.

[0063] Among them, the administrative boundary is the geographical line that divides a region from its surrounding administrative regions. It is usually delimited according to relevant plans such as the local government's economic development plan, land use plan, and urban plan, which clarifies the geographical scope and administrative attribution of the research area.

[0064] An enterprise above a certain scale refers to an enterprise with an annual main business income of 20 million yuan or more. In statistical work, the data of enterprises above a certain scale are mainly concerned and recorded, and these enterprises are important indicators of regional economic activities.

[0065] Optionally, classifying the enterprises within the target area includes:

[0066] Classifying the enterprises within the target area according to the major classification principles of the "Classification of National Economic Industries (GB / T 4754 - 2017)".

[0067] Among them, the major classification principles can be divided into industry types such as power, heat production and supply industry, water production and supply industry, chemical raw materials and chemical products manufacturing industry, petroleum, coal and other fuel processing industries, pharmaceutical manufacturing industry, chemical fiber manufacturing industry, electrical machinery and equipment manufacturing industry, and paper and paper products industry.

[0068] Optionally, the material flow account data includes: basic enterprise information, energy input, input of main raw and auxiliary materials, other inputs, product output, and waste emissions;

[0069] The energy input includes energy in non - material form and energy in material form;

[0070] The input of main raw and auxiliary materials includes the names, types, consumption quantities, and sources of main raw materials and auxiliary materials;

[0071] The other inputs include air and water;

[0072] The product output includes the names, types, production quantities, and destinations of products;

[0073] The waste emissions include the names of wastes, waste categories, emission quantities, waste destinations, and utilization and treatment and disposal methods.

[0074] Among them, the basic enterprise information mainly includes the type and name of the affiliated region, enterprise name, unified social credit code, business scope, affiliated industry category, main business income, etc.

[0075] In a specific embodiment, based on the annual environmental impact assessment report of a typical industrial park in Jiangsu Province for a natural year, the material and energy metabolism characteristics and the disposal flow of solid waste in the industrial park in 2021 were calculated. For the actual calculation result diagram, please refer to Figure 2 and Figure 3 , referring to Figure 2 it can be seen that the metabolic network, energy and material flows of the industrial park, and referring to Figure 3 it can be seen the solid waste flow and disposal situation of the industrial park.

[0076] An evaluation method for the material and energy metabolism and waste flow efficiency of industries at the regional scale specifically includes:

[0077] (1) Defining the system boundary

[0078] In this embodiment, a typical industrial park in Jiangsu Province is taken as the research area, and the system boundary is defined according to the economic development plan of the local provincial government; the time scale is 2022, and the data statistically in 2022 are actually the material and energy metabolism data in 2021.

[0079] (2) Selecting the above-scale enterprises with typical significance closely related to material and energy metabolism in the industrial park as the research objects. There are a total of 38 above-scale productive enterprises in this industrial park.

[0080] (3) Determining the industrial categories of the above-scale enterprises in the park, and these industrial categories serve as the internal system of the material and energy metabolism in the park, as shown in Figure 4 . The traditional material and energy metabolism in the park is only accounted for at the enterprise level, without considering the industrial types to which the park enterprises belong. The basic park data includes enterprise basic information, energy and main raw and auxiliary material consumption, product output, and solid waste emissions and treatment and disposal situations. The data mainly comes from the material flow accounts and the annual statistical reports provided by 38 above-scale enterprises in this industrial park in 2022. When the data is missing, it is supplemented through the enterprise's internal secondary reports, environmental impact assessment reports, and industry research reports.

[0081] (4) According to the metabolic transfer characteristics of materials and energy in the industrial park, multiple subsystems are obtained by classifying according to enterprise types. The subsystems cover energy input, raw and auxiliary material input, other inputs, enterprise types, the output of material products and energy products, the emissions of solid waste, and other emissions. According to the material, energy, and waste flow connections between each enterprise, and obtaining multiple subsystems, the metabolic network of the target area is constructed. For the details of the actually constructed metabolic network of the target area, please refer to Figure 5 .

[0082] (5) After collecting the basic data of the park, analyze the properties of material and energy in the park's production system. This includes determining the types (such as energy, raw materials, products, waste, etc.), quantities, qualities, flow directions, and possible conversion relationships of various materials and energies, and further establishing the metabolic relationships between each subsystem and constructing the corresponding accounting formulas.

[0083] When calculating the input-output metabolism amount of a single substance or a specific element, use the element tracking equation;

[0084] When calculating the input-output metabolism amount of a specific subsystem, use the system conservation equation.

[0085] Optionally, the element tracking equation is obtained by multiplying the material flow account data by the corresponding characteristic element content, and the characteristic elements include organic carbon, N, P, halogens, and metals; the system conservation equation is calculated based on the flow and conversion processes of materials, energy, and waste in the metabolic system.

[0086] The expression of the element tracking equation is:

[0087]

[0088] Among them, is the flow of the required characteristic element, Element in is the mass of the substance or energy, Element content is the content of the characteristic element in the substance, and P is the purity of the substance or energy;

[0089] The expression of the system conservation equation is:

[0090]

[0091] Among them, ME tol is the input-output metabolism amount of the system; Input ΦW and Output ΦW are the material input and output respectively, Input ΦE and Output ΦE are the energy input and output respectively, and the subscripts s, g, and k represent the input, output, and stock categories respectively.

[0092] In this embodiment, taking the calculation of the input-output metabolism amount of a specific subsystem as an example, the constructed accounting formula is as follows:

[0093] 1) Energy input

[0094]

[0095] Among them, E inputis the energy input at the input end; EF p is the energy input in the form of non - material existence at the input end, p is the category of energy in the form of non - material existence, mainly referring to electricity and heat; EW q is the energy input in the form of material existence at the input end, q is the category of energy in the form of material existence, mainly referring to steam and fossil fuels.

[0096] 2) Main raw material input

[0097]

[0098] Among them, W yl is the raw material quality at the input end; i is the number of enterprises, i = 1…n; M j is the quality of different raw materials, j is the raw material type, j = 1…m.

[0099] 3) Main auxiliary material input

[0100]

[0101] Among them, W fl is the auxiliary material quality at the input end; i is the number of enterprises, i = 1…n; F j1 is the quality of different auxiliary materials, j1 is the auxiliary material type, j1 = 1…m.

[0102] 4) Other inputs

[0103]

[0104] Among them, W qt is the other input quality at the input end; i is the number of enterprises, i = 1…n; Q j2 is the quality of other inputs, j2 is the type of other inputs, j2 = 1…m, such as water, air, etc.

[0105] 5) Material product output

[0106]

[0107] Among them, W cp is the product output at the output end; i is the number of enterprises, i = 1…n; C e is the quality of different products, e is the product type, e = 1…m.

[0108] 6) Energy product output

[0109]

[0110] Among them, E cp is the energy product output at the output end; i is the number of enterprises, i = 1…n; E rFor the quality of different energy products, r is the type of energy product, r = 1…m.

[0111] 7) Solid waste emissions

[0112]

[0113] Among them, W gf is the solid waste emission at the output end; W yb and W wx are the general solid waste emission and hazardous waste emission at the output end respectively; i is the number of enterprises, i = 1…n; Y jt is the general solid waste emission, X jt is the hazardous waste emission, and jt is the waste type, jt = 1…m.

[0114] 8) Other emissions

[0115]

[0116] Among them, W qt is the other emission at the output end; W fq , W fs are the waste gas emission and waste water emission respectively; j is the number of enterprises, i = 1…n; G y is the waste gas quality, y is the waste gas type, y = 1…m; water is the waste water quality.

[0117] 9) Hidden flow

[0118] W yc = W yl + W fl + W qt - W cp - W gf - W qt

[0119] Among them, W yc is the hidden flow quality.

[0120] (7) According to the input-output balance of all elements of enterprises in the industrial park, after calculating the metabolism amount between enterprises in the basic unit, based on the obtained basic data and the system conservation equation, calculate the input-output metabolism amount of the overall material and energy metabolism system in the industrial park and the emission contribution to the environment ( Figures 2 - 3 ). Taking the energy supply system as an example, the energy input at the industry input end is the sum of the energy inputs at the input ends of enterprises of the same type, and the energy input at the park system input end is the sum of the energy inputs at the input ends of all industry types.

[0121] Taking the material flow account of enterprise A as an example:

[0122]

[0123]

[0124] Calculated according to the above formula, the EF of Enterprise A p The energy input is: 13656600 kwh + 28801 MJ, equivalent to 1679 tons of standard coal, without EW q The energy input, that is, the energy input quantity E at the input end of the enterprise input Is 1679 tons of standard coal. The raw material input of Enterprise A can be divided into organic chemical raw materials and inorganic chemical raw materials. Among them, the organic chemical raw materials are 2740 tons and the inorganic chemical raw materials are 658 tons. Enterprise A has no auxiliary material input and no other input. The product output of Enterprise A is 2624 tons of chemical reagents produced, and there is no energy product output. The general solid waste discharge of Enterprise A is 119 tons, the hazardous waste discharge is 379 tons, and the total solid waste discharge W gf Is 498 tons, without waste gas and wastewater discharge. The hidden flow mass of Enterprise A is 276 tons.

[0125] Energy metabolism efficiency = (energy quantity effectively used / total input energy quantity) × 100%. Since no energy is converted into products, the effectively converted energy quantity is 0. Therefore, the energy efficiency is 0. This indicates that in this embodiment, the energy efficiency of the park is extremely low because no energy is effectively converted into the required products or services.

[0126] Material metabolism efficiency = (effectively converted material quantity / total material input quantity) × 100% = 2624 / 3398 × 100% = 77.22%, that is, the material metabolism efficiency is 77.22%, indicating that Enterprise A can relatively effectively convert the input materials into the required products or services.

[0127] The waste disposal method of Enterprise A is landfill and incineration, without utilization, that is, the waste metabolism efficiency of Enterprise A = (waste effectively utilized or treated quantity / total waste generated quantity) × 100% = 0 / 498 × 100% = 0.

[0128] Based on the content of the above embodiment, further, according to the evaluation method of regional-scale industrial material and energy metabolism and waste flow efficiency provided by the present invention, the material and energy metabolism characteristics of a typical industrial park in Jiangsu in 2021 and the material and energy input-output metabolism amounts of 38 above-scale enterprises in the park are calculated in detail. At the same time, the key waste-producing industries and high-energy-consuming industries in the park are identified, providing effective data references for relevant departments and personnel to understand the main solid waste discharge sources in the park and identify priority treatment and control areas. For the results of the actually measured material and energy metabolism characteristics of the industrial park, please refer to Figure 2The park system's main energy input is about 800,000 tons of standard coal, and the input of raw and auxiliary materials is about 1.281 million tons. Product output, solid waste emissions and other emissions are 663,800 tons, 185,200 tons and 432,200 tons respectively.

[0129] refer to Figure 2 It can be seen that the system metabolism of the park is relatively small, and the amount of solid waste generated is large. The main industries in the park, such as the chemical industry, should increase the utilization and conversion rate of raw and auxiliary materials as soon as possible. Figure 3 It can be seen that solid waste disposal mainly adopts the terminal treatment method, and its final destination is mainly distributed in the city. It is recommended to optimize the industrial structure in the park as soon as possible, promote coordinated disposal, energy exchange and resource recycling among solid wastes, realize production process coupling and multi-production, improve the efficiency of solid waste resource utilization on-site, and promote the high-quality development of "waste-free city" through the construction of "waste-free park".

[0130] Embodiment 2

[0131] The present invention also provides a system for calculating the regional scale industrial material energy metabolism and waste flow efficiency, comprising:

[0132] The regional module is used to determine the geographical boundaries, time boundaries and scale boundaries corresponding to the target area; the scale boundaries are enterprises above a certain scale;

[0133] An enterprise module, used for classifying enterprises related to material and energy flows in the target area;

[0134] A data module is used to obtain the material flow account data of each enterprise, merge the material and energy input items and output items of enterprises of the same type, obtain the subsystem corresponding to each enterprise type, establish the material, energy and waste flow connection between enterprises, and construct the metabolic network of the target area; the subsystem includes input, output and enterprise type;

[0135] An accounting module, used to determine the accounting formula of the metabolic network according to the input-output balance of each element of all enterprises in the target area; the accounting formula includes an element tracking equation and a system conservation equation;

[0136] A calculation result module is used to calculate the input-output metabolic amount and waste metabolic efficiency of the target area according to the material flow account data and the calculation formula.

[0137] A system for calculating industrial material energy metabolism and waste flow efficiency at a regional scale provided by an embodiment of the present invention is used to execute an evaluation method for industrial material energy metabolism and waste flow efficiency at a regional scale provided by any embodiment of the present invention, and has corresponding beneficial effects.

[0138] Embodiment 3

[0139] The present invention also provides an electronic device, including a processor, a memory, and a communication bus; the communication bus is used to connect the processor and the memory; the processor is used to execute a computer program stored in the memory to implement the method according to any one of the first embodiments.

[0140] Embodiment Four

[0141] The present invention also provides a computer-readable storage medium, on which a computer program is stored, and the computer program is used to cause the computer to execute the method according to any one of the first embodiments.

[0142] It is easy for those skilled in the art to understand that the above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for evaluating the efficiency of industrial material energy metabolism and waste flow at a regional scale, characterized in that: include: S1. Determine the geographical boundaries, time boundaries and scale boundaries corresponding to the target area; The scale boundary is enterprises above designated size; S2. Classify the enterprises related to the flow of materials and energy within the target area; S3. Obtain the material flow account data of each enterprise, merge the material and energy input items and output items of enterprises of the same type, obtain the subsystem corresponding to each enterprise type, and establish the material, energy and waste flow connection between enterprises to construct the metabolic network of the target area; the subsystem includes input, output and enterprise type; S4. Determine the calculation formula of the metabolic network according to the input-output balance of each factor of all enterprises in the target area; The calculation formula includes element tracking equation and system conservation equation; S5. Calculate the input-output metabolic amount and waste metabolic efficiency of the target area according to the material flow account data and the calculation formula.

2. The method according to claim 1, characterized in that The material flow account data include: basic enterprise information, energy input, main raw and auxiliary material input, other input, product output and waste discharge; The energy input includes energy in non-material form and energy in material form; The main raw and auxiliary material inputs include the names, types, consumption and sources of the main raw materials and auxiliary materials; Said other inputs include air and water; The product output includes product name, type, output and destination; The waste emissions include the waste name, waste category, emission volume, waste destination, and utilization and treatment and disposal methods.

3. The method according to claim 1, characterized in that The element tracking equation expression is: in, is the required characteristic element flow, Element in Element is the mass of matter or energy. content is the characteristic element content in the substance, and P is the purity of the substance or energy; The system conservation equation is expressed as: Among them, ME tol Input is the input-output metabolism of the system; ΦW and Output ΦW They are material input and output, Input ΦE and Output ΦE are energy input and output, respectively, and the subscripts s, g, and k denote the input, output, and stock categories, respectively.

4. The method according to claim 3, characterized in that When calculating the input-output metabolism of a single substance or a specific element, the element tracking equation is used; In calculating the input-output metabolic quantities of a particular subsystem, the system conservation equations are employed.

5. The method according to claim 1, characterized in that The target areas include cities, development zones, industrial parks or solid waste industrial parks; The geographical boundary is the administrative boundary corresponding to the target area; The time boundary is at least one natural year.

6. The method according to claim 1, characterized in that The classification of enterprises in the target area includes: Enterprises in the target area are classified according to the major classification principles of the "National Economic Industry Classification (GB / T 4754-2017)".

7. The method according to claim 1, characterized in that The inputs of the subsystem include energy input, raw material input and other inputs; The output of the subsystem includes the output of material products and energy products, the discharge of solid waste and other emissions.

8. A system for calculating the energy metabolism and waste flow efficiency of regional-scale industries, characterized in that: include: The regional module is used to determine the geographical boundaries, time boundaries and scale boundaries corresponding to the target area; The scale boundary is enterprises above designated size; An enterprise module, used for classifying enterprises related to material and energy flows in the target area; A data module is used to obtain the material flow account data of each enterprise, merge the material and energy input items and output items of enterprises of the same type, obtain the subsystem corresponding to the enterprise type, establish the material, energy and waste flow connection between enterprises, and construct the metabolic network of the target area; the subsystem includes input, output and enterprise type; An accounting module, used to determine the accounting formula of the metabolic network according to the input-output balance of each factor of all enterprises in the target area; The calculation formula includes element tracking equation and system conservation equation; A calculation result module is used to calculate the input-output metabolic amount and waste metabolic efficiency of the target area according to the material flow account data and the calculation formula.

9. An electronic device, characterized in that: The system comprises a processor, a memory and a communication bus; the communication bus is used to connect the processor and the memory; the processor is used to execute a computer program stored in the memory to implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and the computer program is used to make the computer execute the method according to any one of claims 1 to 7.

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