Industrial waste heat and energy recovery and energy level matching optimization methods and systems

Abstract

This invention discloses a method and system for industrial waste heat and energy recovery and energy level matching optimization. The method includes the following steps: performing energy balance analysis on the parameters of the industrial waste heat and energy recovery system to establish an energy conversion flowchart; performing flow analysis on the parameters of the industrial waste heat and energy recovery system to establish a conversion flowchart; calculating the energy efficiency of each process node based on the energy conversion flowchart to establish an energy analysis list; calculating the efficiency of each process node based on the conversion flowchart to establish an analysis list; establishing an industrial process energy and system optimization model based on the energy analysis list and the analysis list; and calculating the energy / ratio of waste heat and energy in each process node based on the optimization model, thereby establishing an optimization method based on energy efficiency, efficiency, and energy / ratio. This invention identifies the direction for improving and optimizing the waste heat and energy recovery system and the optimization approach for energy level matching.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy optimization of industrial waste heat and waste energy recovery systems, and relates to the improvement of the energy efficiency of industrial energy systems. In particular, it relates to a method and system for industrial waste heat and waste energy recovery and energy level matching optimization and improvement based on energy efficiency, efficiency and energy / ratio. Background Art

[0002] Typical "double-high" industries (such as cement, glass, steel, textile, printing and dyeing, chemical industry, chemical fiber) have problems of high energy consumption and high carbon emissions. However, the energy consumption behaviors and waste energy emission characteristics of enterprises in each industry are very different. The improvement of energy efficiency within enterprises mainly focuses on single equipment and single type of energy systems, and there is little involvement in the complementary and collaborative optimization of multiple types of energy systems within enterprises, and even among multiple enterprises or multiple industries. Moreover, the actual energy system structure is complex, with numerous material flows and energy flows. Technical improvement methods that simply target a specific link in terms of energy conversion, environmental emissions, or economic benefits are difficult to bring a qualitative improvement to the entire system. In industrial parks with a wide layout of single-type enterprises in China at present, the complementary and collaborative characteristics of enterprise energy consumption behaviors and those of other industry enterprises are not comprehensively considered. On the one hand, it causes the energy consumption per ten thousand yuan of added value of enterprises to remain high, and on the other hand, it greatly increases carbon emissions and consumes the energy consumption indicators of the whole society.

[0003] The current energy optimization analysis method mainly adopts the energy balance calculation method based on the first law of thermodynamics, and its application to energy systems, especially in aspects such as the exploration of energy-saving potential and the improvement of energy level matching in complex industrial waste heat and waste energy recovery systems, is far from sufficient. Therefore, "exergy" and analysis have become an important indicator for evaluating energy systems, especially thermal systems. It refers to the maximum work that a certain form of energy or a certain state of matter can do after undergoing a completely reversible change process and reaching a state of complete equilibrium with the environment. The analysis method can more accurately reflect the thermodynamic perfection degree of a thermal system or device technically, thereby clarifying the correct goal of improving energy utilization efficiency.

[0004] In recent years the analysis method has been effectively applied to the analysis and evaluation of the energy conversion efficiency of energy systems such as thermal power generation systems, waste management systems, and biomass energy systems. Summary of the Invention

[0005] The present invention provides a method and system for industrial waste heat and waste energy recovery and energy level matching optimization and improvement based on energy efficiency, efficiency and energy / A method and system for optimizing and improving the ratio of industrial waste heat and energy recovery and energy level matching is proposed, which involves constructing a flow chart for industrial waste heat and energy conversion. Conversion flowchart, focusing on energy efficiency, Efficiency and Energy The ratio index serves as the objective function for system optimization, determining the system's energy utilization level and the potential for industrial waste heat and energy recovery, as well as identifying the direction for improvement and optimization of the waste heat and energy recovery system and the optimization approach that matches the energy level.

[0006] Therefore, one technical solution adopted by the present invention is: a method for industrial waste heat and energy recovery and energy level matching optimization, which includes:

[0007] Determine the main process flow and key calculation nodes of the industrial waste heat and energy recovery and utilization system, and collect the material flow, temperature, flow rate, concentration and pressure parameters before and after each calculation node;

[0008] An energy balance analysis was conducted on the parameters of the industrial waste heat and energy recovery and utilization system, and an energy conversion flow chart of the industrial waste heat and energy recovery and utilization system was established.

[0009] Parameters of industrial waste heat and energy recovery and utilization systems Flow analysis to establish an industrial waste heat and energy recovery and utilization system Conversion flowchart;

[0010] Based on the energy conversion flowchart, calculate the energy efficiency of each section node of the industrial waste heat and waste energy recovery and utilization system, and establish an energy analysis list.

[0011] according to Transformation flowchart, calculation of each stage node of the industrial waste heat and energy recovery and utilization system. Efficiency, Establishment Analysis list;

[0012] According to the energy analysis list and Analyze the inventory and establish industrial process energy, System optimization model;

[0013] Based on the optimization model, the waste heat and energy energy of each section of the industrial waste heat and energy recovery system is calculated. The ratio, thus establishing a basis for energy efficiency, Efficiency and Energy A method for optimizing and improving the ratio of industrial waste heat and energy recovery and energy level matching.

[0014] This invention analyzes the energy consumption characteristics of typical industries, identifies potential energy-saving points in their processes, and adopts energy efficiency-based... Efficiency and Energy A method for optimizing and improving the ratio of industrial waste heat and energy recovery and energy level matching.

[0015] Furthermore, the energy flow scenario of the industrial process is determined, and an equivalent simplified model of the process flow of the industrial waste heat and energy recovery and utilization system is established. The main calculation nodes of the industrial waste heat and energy recovery and utilization system, as well as the material flow, temperature, flow rate, concentration and pressure parameters before and after each calculation node are determined through the equivalent simplified model of the process flow.

[0016] Furthermore, assuming the industrial waste heat and energy recovery system operates under steady-state conditions, the reference state is defined as follows: reference temperature T0 is 273.15K, and reference pressure P0 is 0.1MPa.

[0017] Furthermore, the system's energy balance can be described as follows:

[0018]

[0019] in, and These are the enthalpy values ​​for the inlet and outlet sections, respectively. To exchange heat, Work done in an industrial process or work input to the system from the outside;

[0020] For a specific work section, its energy efficiency η En for:

[0021]

[0022] Furthermore, the enthalpy of the stable flowing fluid. The calculation formula is:

[0023]

[0024] Where, m f h represents the fluid mass. f and h f,0 These are the enthalpy values ​​under operating conditions and under reference conditions, respectively.

[0025] Furthermore, the system The balance is described as follows:

[0026]

[0027] in, and These are respectively for entering and exiting a certain section. value, For heat value, For mechanical work or electrical energy value, Irreversible in industrial processes loss;

[0028] For a specific work section, its Efficiency η ex for:

[0029]

[0030] Calories The value is determined by the efficiency of the Carnot cycle:

[0031]

[0032] In the formula, For heat exchange.

[0033] Furthermore, the stable flow of fluids The formula for calculating the value is:

[0034] e = e ph +e ch +e v +e H (4)

[0035] Among them, e, e ph e ch e v and e H They are respectively Value, Physical Chemical kinetic energy and potential energy

[0036] Furthermore, physics The calculation method is as follows:

[0037] e ph =∑[(h-h0)-T0(s-s0)] (5)

[0038] in,

[0039]

[0040]

[0041] Wherein, the reference temperature T0 is 273.15 K, and the reference pressure P0 is 0.1 MPa; P represents the gas pressure; R represents the ideal gas constant; c p The isobaric specific heat of a substance is calculated using the following formula:

[0042] c p = a + b × T + c × T 2 +d×T 3+f / T 2 (8)

[0043] Where T is temperature, in K / 1000; a, b, c, d and f are all specific heat coefficients for gas at constant pressure.

[0044] Furthermore, the chemistry of fluids Depending on its substance and concentration, it can be calculated using the following formula:

[0045]

[0046] Among them, y i and e 0 ch,i Standards for a certain gas The value and its molar percentage in the fluid;

[0047] For a conventional steady fluid, its kinetic energy With potential energy Compared to several other factors, it is negligible; therefore, the steady flow of fluid... The value is represented as:

[0048]

[0049] Another technical solution adopted in this invention is: an industrial waste heat and energy recovery and energy level matching optimization system, which includes:

[0050] Parameter acquisition unit: Determines the main process flow and main calculation nodes of the industrial waste heat and waste energy recovery and utilization system, and collects material flow, temperature, flow rate, concentration and pressure parameters before and after each calculation node;

[0051] Energy Conversion Flowchart Establishment Unit: Based on the parameters of the industrial waste heat and waste energy recovery and utilization system, energy balance analysis is performed to establish the energy conversion flowchart of the industrial waste heat and waste energy recovery and utilization system.

[0052] The conversion flowchart establishment unit: This unit focuses on the parameters of the industrial waste heat and energy recovery and utilization system. Flow analysis to establish an industrial waste heat and energy recovery and utilization system Conversion flowchart;

[0053] Energy Analysis Inventory Establishment Unit: Based on the energy conversion flowchart, calculate the energy efficiency of each node in the industrial waste heat and waste energy recovery and utilization system, and establish an energy analysis inventory.

[0054] Analysis list creation unit: based on Transformation flowchart, calculation of each stage node of the industrial waste heat and energy recovery and utilization system. Efficiency, Establishment Analysis list;

[0055] Optimization model building unit: based on the energy analysis list and Analyze the inventory and establish industrial process energy, System optimization model;

[0056] Calculation Unit: Based on the optimization model, calculates the waste heat and energy of each section of the industrial waste heat and energy recovery system. ratio.

[0057] This invention constructs a flow chart for the conversion of industrial waste heat and waste energy. Conversion flowchart, focusing on energy efficiency, Efficiency and Energy The ratio index serves as the objective function for system optimization, determining the system's energy utilization level and the potential for industrial waste heat and energy recovery and utilization. It also identifies the direction for improvement and optimization of the waste heat and energy recovery and utilization system and the optimization approach that matches the energy level. Attached Figure Description

[0058] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0059] Figure 1 The flowchart is a process for the industrial waste heat and energy recovery and energy level matching optimization method of the present invention.

[0060] Figure 2 This is a structural diagram of the industrial waste heat and energy recovery and energy level matching optimization system of the present invention. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0062] Example 1

[0063] This embodiment describes a method for industrial waste heat and energy recovery and energy level matching optimization, such as... Figure 1 As shown, the steps are as follows:

[0064] Determine the energy flow scenario in the industrial process, and based on the different energy flow forms in the actual process flow, such as electrical energy, thermal energy (steam), gas, compressed air, etc., as well as the characteristics of parameter changes during the energy flow process, such as temperature changes, pressure changes, flow rate changes, etc., make equivalent simplifications to the different energy flows in the process flow, and establish an equivalent simplification model of the process flow of the industrial waste heat and waste energy recovery and utilization system.

[0065] The main computational nodes of the industrial waste heat and energy recovery and utilization system, as well as the physical property parameters such as material flow, temperature, flow rate, concentration and pressure before and after each computational node, are determined by using an equivalent simplified model of the process flow.

[0066] An energy balance analysis was conducted on the parameters of the industrial waste heat and energy recovery and utilization system, and an energy conversion flow chart of the industrial waste heat and energy recovery and utilization system was established.

[0067] Parameters of industrial waste heat and energy recovery and utilization systems Flow analysis to establish an industrial waste heat and energy recovery and utilization system Conversion flowchart;

[0068] Based on the energy conversion flowchart, calculate the energy efficiency of each section node of the industrial waste heat and waste energy recovery and utilization system, and establish an energy analysis list.

[0069] according to Transformation flowchart, calculation of each stage node of the industrial waste heat and energy recovery and utilization system. Efficiency, Establishment Analysis list;

[0070] According to the energy analysis list and Analyze the inventory and establish industrial process energy, System optimization model;

[0071] Based on the optimization model, the waste heat and energy energy of each section of the industrial waste heat and energy recovery system is calculated. The ratio, thus establishing a basis for energy efficiency, Efficiency and Energy A method for optimizing and improving the ratio of industrial waste heat and energy recovery and energy level matching.

[0072] Assuming the industrial waste heat and energy recovery system operates under steady-state conditions, the reference state is defined as follows: reference temperature T0 is 273.15 K, and reference pressure P0 is 0.1 MPa. The system energy balance is described as follows:

[0073]

[0074] in, and These are the enthalpy values ​​for the inlet and outlet sections, respectively. To exchange heat, Work done in industrial processes / Work input to the system from the outside.

[0075] The formula for calculating the enthalpy of a stable flowing working fluid is:

[0076]

[0077] Where, m f h represents the fluid mass. f and h f,0 These are the enthalpy values ​​under operating conditions and under reference conditions, respectively.

[0078] system The balance is described as follows:

[0079]

[0080] in, and These are respectively for entering and exiting a certain section. value, For heat value, For mechanical work or electrical energy value, Irreversible in industrial processes loss;

[0081] system The formula for calculating the value is:

[0082] e = e ph +e ch +e v +e H (4)

[0083] Among them, e, e ph e ch e v and e H They are respectively Value, Physical Chemical kinetic energy and potential energy

[0084] physics The calculation method is as follows:

[0085] e ph =∑[(h-h0)-T0(s-s0)] (5)

[0086] in,

[0087]

[0088]

[0089] Where P represents gas pressure; R represents the ideal gas constant, with a value of 8.314 J / (mol·K); c p The isobaric specific heat of a substance is calculated using the following formula:

[0090] c p = a + b × T + c × T 2 +d×T 3 +f / T 2 (8)

[0091] Where T is temperature, in K / 1000; a, b, c, d, and f are the specific heat calculation coefficients for gases at constant pressure, as shown in the table below:

[0092] Table 1 Calculation coefficients for specific heat of gas at constant pressure

[0093] gas a b c d f Temperature range <![CDATA[e 0 ch (kJ / mol) a <!-- 5 --> ]]> <![CDATA[H2]]> 33.07 -11.36 11.43 -2.77 -0.16 298-1000K 236.1 <![CDATA[H2]]> 18.56 12.25 -2.86 0.27 1.98 1000-2500K 236.1 <![CDATA[CO2]]> 25.00 55.19 -33.69 7.95 -0.14 298-1200K 19.87 CO 25.57 6.10 4.05 -2.67 0.13 298-1300K 275.10 <![CDATA[O2]]> 30.03 8.77 -3.99 0.79 -0.74 700-2000K 3.97 <![CDATA[CH4]]> -0.70 108.48 -42.51 5.86 0.68 298-1300K 831.65 <![CDATA[N2]]> 19.51 19.89 -8.60 1.37 0.53 500-2000K 0.69 <![CDATA[C2H4]]> -6.39 184.40 -112.97 28.50 0.32 298-1200K 1361.1 <![CDATA[C2H2]]> 40.69 40.73 -16.18 3.67 -0.66 298-1100K 1265.8 <![CDATA[C2H2]]> 67.47 11.75 -2.02 0.14 -9.81 1100-6000K 1265.8 <![CDATA[C2H6 b ]]> - - - - - - 1495.84

[0094] Calories The calculation is determined by the efficiency of the Carnot cycle:

[0095]

[0096] Fluid Chemistry Depending on its substance and concentration, it can be calculated using the following formula:

[0097]

[0098] Among them, y i and Standards for a certain gas The value and its molar percentage in the fluid.

[0099] For a conventional steady fluid, its kinetic energy With potential energy Compared to several other factors, this is negligible; therefore, the stability of the flowing fluid... The value can be represented as:

[0100]

[0101] For a specific work section, its energy efficiency is:

[0102]

[0103] For a specific work section, its Efficiency is:

[0104]

[0105] Example 2

[0106] This embodiment describes an industrial waste heat and energy recovery and energy level matching optimization system, such as... Figure 2 As shown, it consists of a parameter acquisition unit, an energy conversion flowchart establishment unit, and Conversion flowchart creation unit, energy analysis list creation unit, It consists of an analysis list establishment unit, an optimization model establishment unit, and a calculation unit.

[0107] Parameter acquisition unit: Determines the main process flow and key calculation nodes of the industrial waste heat and energy recovery system, and collects material flow, temperature, flow rate, concentration, and pressure parameters before and after each calculation node. The parameter acquisition unit includes a process flow equivalent simplification model establishment subunit and a parameter determination subunit. The process flow equivalent simplification model establishment subunit: Determines the energy flow scenario of the industrial process and establishes an equivalent simplification model of the industrial waste heat and energy recovery system. The parameter determination subunit: Determines the main calculation nodes of the industrial waste heat and energy recovery system, as well as the material flow, temperature, flow rate, concentration, and pressure parameters before and after each calculation node, using the process flow equivalent simplification model.

[0108] Energy Conversion Flowchart Establishment Unit: Based on the parameters of the industrial waste heat and waste energy recovery and utilization system, an energy conversion flowchart for the industrial waste heat and waste energy recovery and utilization system is established.

[0109] The conversion flowchart establishment unit: This unit focuses on the parameters of the industrial waste heat and energy recovery and utilization system. Flow analysis to establish an industrial waste heat and energy recovery and utilization system Conversion flowchart.

[0110] Energy Analysis Inventory Establishment Unit: Based on the energy conversion flowchart, calculate the energy efficiency of each node in the industrial waste heat and waste energy recovery and utilization system, and establish an energy analysis inventory.

[0111] Analysis list creation unit: based on Transformation flowchart, calculation of each stage node of the industrial waste heat and energy recovery and utilization system. Efficiency, Establishment Analysis list.

[0112] Optimization model building unit: based on the energy analysis list and Analyze the inventory and establish industrial process energy, System optimization model.

[0113] Calculation Unit: Based on the optimization model, calculates the waste heat and energy of each section of the industrial waste heat and energy recovery system. The ratio, thus establishing a basis for energy efficiency, Efficiency and Energy Industrial waste heat and energy recovery and energy level matching optimization system based on ratio.

[0114] Assuming the industrial waste heat and energy recovery system operates under steady-state conditions, the reference state is defined as follows: reference temperature T0 is 273.15K, and reference pressure P0 is 0.1MPa.

[0115] The system energy balance is described as follows:

[0116]

[0117] in, and These are the enthalpy values ​​for the inlet and outlet sections, respectively. To exchange heat, Work done in an industrial process or work input to the system from the outside;

[0118] For a specific work section, its energy efficiency η En for:

[0119]

[0120] Enthalpy of a steadily flowing fluid The calculation formula is:

[0121]

[0122] Where, m f h represents the fluid mass. f and h f,0 These are the enthalpy values ​​under operating conditions and under reference conditions, respectively.

[0123] system The balance is described as follows:

[0124]

[0125] in, and These are respectively for entering and exiting a certain section. value, For heat value, For mechanical work or electrical energy value, Irreversible in industrial processes loss;

[0126] For a specific work section, its Efficiency η ex for:

[0127]

[0128] Calories The value is determined by the efficiency of the Carnot cycle:

[0129]

[0130] In the formula, For heat exchange.

[0131] Stable fluid flow The formula for calculating the value is:

[0132] e = e ph +e ch +e v +e H (4)

[0133] Among them, e, e ph e ch e v and e H They are respectively Value, Physical Chemical kinetic energy and potential energy

[0134] physics The calculation method is as follows:

[0135] e ph =∑[(h-h0)-T0(s-s0)] (5)

[0136] in,

[0137]

[0138]

[0139] Wherein, the reference temperature T0 is 273.15 K, and the reference pressure P0 is 0.1 MPa; P represents the gas pressure; R represents the ideal gas constant; c p The isobaric specific heat of a substance is calculated using the following formula:

[0140] c p = a + b × T + c × T 2 +d×T 3 +f / T 2 (8)

[0141] Where T is temperature, in K / 1000; a, b, c, d and f are all specific heat coefficients for gas at constant pressure.

[0142] Fluid Chemistry Depending on its substance and concentration, it can be calculated using the following formula:

[0143]

[0144] Among them, y i and e 0 ch,i Standards for a certain gas The value and its molar percentage in the fluid;

[0145] For a conventional steady fluid, its kinetic energy With potential energy Compared to several other factors, it is negligible; therefore, the steady flow of fluid... The value is represented as:

[0146]

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for industrial waste heat and energy recovery and energy level matching optimization, characterized in that, include: Determine the main process flow and key calculation nodes of the industrial waste heat and energy recovery and utilization system, and collect the material flow, temperature, flow rate, concentration and pressure parameters before and after each calculation node; An energy balance analysis was conducted on the parameters of the industrial waste heat and energy recovery and utilization system, and an energy conversion flow chart of the industrial waste heat and energy recovery and utilization system was established. Parameters of industrial waste heat and energy recovery and utilization systems Flow analysis to establish an industrial waste heat and energy recovery and utilization system Conversion flowchart; Based on the energy conversion flowchart, calculate the energy efficiency of each section node of the industrial waste heat and waste energy recovery and utilization system, and establish an energy analysis list. according to Transformation flowchart, calculation of each stage node of the industrial waste heat and energy recovery and utilization system. Efficiency, Establishment Analysis list; According to the energy analysis list and Analyze the inventory and establish industrial process energy, System optimization model; Based on the optimization model, the waste heat and energy energy of each section of the industrial waste heat and energy recovery system is calculated. ratio; system The balance is described as follows: in, and These are respectively for entering and exiting a certain section. value, For heat value, For mechanical work or electrical energy value, Irreversible in industrial processes loss; For a specific work section, its Efficiency η ex for: Calories The value is determined by the efficiency of the Carnot cycle: In the formula, For heat exchange, T0 is the reference temperature and T is the temperature.

2. The method for industrial waste heat and energy recovery and energy level matching optimization as described in claim 1, characterized in that, Determine the energy flow scenario in the industrial process and establish an equivalent simplified model of the process flow of the industrial waste heat and waste energy recovery and utilization system. The main computational nodes of the industrial waste heat and energy recovery system, as well as the material flow, temperature, flow rate, concentration, and pressure parameters before and after each computational node, are determined by using an equivalent simplified model of the process flow.

3. The method for industrial waste heat and energy recovery and energy level matching optimization as described in claim 1, characterized in that, Assuming the industrial waste heat and energy recovery system operates under steady-state conditions, the reference state is defined as follows: reference temperature T0 is 273.15K, and reference pressure P0 is 0.1MPa.

4. The method for industrial waste heat and energy recovery and energy level matching optimization as described in claim 3, characterized in that, The system energy balance is described as follows: in, and These are the enthalpy values ​​for the inlet and outlet sections, respectively. To exchange heat, Work done in an industrial process or work input to the system from the outside; For a specific work section, its energy efficiency η En for:

5. The method for industrial waste heat and energy recovery and energy level matching optimization as described in claim 1, characterized in that, Enthalpy of a steadily flowing fluid The calculation formula is: Where, m f h represents the fluid mass. f and h f,0 These are the enthalpy values ​​under operating conditions and under reference conditions, respectively.

6. The method for industrial waste heat and energy recovery and energy level matching optimization as described in claim 1, characterized in that, Stable fluid flow The formula for calculating the value is: and=and ph +e ch +e v +e H Among them, e, e ph e ch e v and e H They are respectively Value, Physical ,Chemical ,kinetic energy and potential energy 7. The method for industrial waste heat and energy recovery and energy level matching optimization as described in claim 6, characterized in that, physics The calculation method is as follows: e ph =∑[(h-h0)-T0(s-s0)] in, Wherein, the reference temperature T0 is 273.15 K, and the reference pressure P0 is 0.1 MPa; P represents the gas pressure; R represents the ideal gas constant; c p The isobaric specific heat of a substance is calculated using the following formula: c p =a+b×T+c×T 2 +d×T 3 +f / T 2 Where T is temperature, in K / 1000; a, b, c, d and f are all specific heat coefficients for gas at constant pressure.

8. The method for industrial waste heat and energy recovery and energy level matching optimization as described in claim 7, characterized in that, Fluid Chemistry Depending on its substance and concentration, it can be calculated using the following formula: Among them, y i and e 0 ch,i Standards for a certain gas The value and its molar percentage in the fluid; For a conventional steady fluid, its kinetic energy and potential energy and Value, Physical and chemistry In comparison, it is negligible; therefore, the steady flow of fluids... The value is represented as:

9. An industrial waste heat and energy recovery and energy level matching optimization system, used to implement the industrial waste heat and energy recovery and energy level matching optimization method according to any one of claims 1-8, characterized in that, include: Parameter acquisition unit: Determines the main process flow and main calculation nodes of the industrial waste heat and waste energy recovery and utilization system, and collects material flow, temperature, flow rate, concentration and pressure parameters before and after each calculation node; Energy Conversion Flowchart Establishment Unit: Based on the parameters of the industrial waste heat and waste energy recovery and utilization system, energy balance analysis is performed to establish the energy conversion flowchart of the industrial waste heat and waste energy recovery and utilization system. The conversion flowchart establishment unit: This unit focuses on the parameters of the industrial waste heat and energy recovery and utilization system. Flow analysis to establish an industrial waste heat and energy recovery and utilization system Conversion flowchart; Energy Analysis Inventory Establishment Unit: Based on the energy conversion flowchart, calculate the energy efficiency of each node in the industrial waste heat and waste energy recovery and utilization system, and establish an energy analysis inventory. Analysis of the list creation unit: based on Transformation flowchart, calculation of each stage node of the industrial waste heat and energy recovery and utilization system. Efficiency, Establishment Analysis list; Optimization model building unit: based on the energy analysis list and Analyze the inventory and establish industrial process energy, System optimization model; Calculation Unit: Based on the optimization model, calculates the waste heat and energy of each section of the industrial waste heat and energy recovery system. ratio.

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