Industrial flue gas waste heat energy recovery management method and system

Abstract

The invention provides an industrial flue gas waste heat energy recovery management method and system, and relates to the technical field of industrial thermal management, and the method comprises the following steps: S1, setting an energy layering system and an energy heat exchange structure; s2, analyzing to obtain a target energy grading interval and a target energy heat exchange mode of the to-be-recycled industrial flue gas, and performing heat exchange treatment on the to-be-recycled industrial flue gas to obtain to-be-stored waste heat energy; s3, a heat storage unit is arranged; s4, analyzing to obtain a target structure gradient interval of to-be-stored waste heat energy and a target storage medium; the waste heat energy to be stored is subjected to waste heat energy recovery and storage; and S5, a waste heat supply and demand prediction model is set, waste heat supply heat and waste heat demand heat are obtained through analysis, and industrial flue gas waste heat energy is managed according to the waste heat supply heat and the waste heat demand heat. According to the industrial flue gas waste heat energy recovery management system, the recovery management efficiency of industrial flue gas waste heat energy is improved through a three-in-one technical system of energy quality grading, dynamic energy storage and intelligent regulation and control.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial thermal management, and in particular to an industrial flue gas waste heat energy recovery management method and system. Background Art

[0002] Currently, traditional waste heat recovery systems have the following defects: limited single-stage heat exchange efficiency (conventional system heat recovery rate is <60%), insufficient utilization of low-grade waste heat (<200°C), large system thermal inertia leading to dynamic adjustment lag, corrosive flue gas causing equipment life reduction, etc., and existing technologies also have the following pain points: failure to coordinate the recovery of sensible heat and latent heat, decoupled operation of thermal systems and production processes, and energy loss caused by insufficient peak-shaving capacity of the heat network.

[0003] In order to solve the above-mentioned problems existing in the current related technologies, this application provides an industrial flue gas waste heat energy recovery management method and system, which improves the recovery and management efficiency of industrial flue gas waste heat energy through the three-in-one technical system of "energy quality classification-dynamic energy storage-intelligent regulation". Summary of the Invention

[0004] This application provides an industrial flue gas waste heat energy recovery management method, including:

[0005] Step S1: Setting up an energy stratification system and an energy heat exchange structure, wherein the energy stratification system corresponds to the energy heat exchange structure; wherein the energy stratification system includes energy grading intervals and energy heat exchange modes corresponding to the energy grading intervals; the energy heat exchange structure includes a radiation heat exchanger, a cyclone heat exchanger, and a compound condenser;

[0006] Step S2: Obtaining the flue gas waste heat temperature of the industrial flue gas to be recovered, comparing and analyzing the flue gas waste heat temperature with the energy classification interval, and obtaining a target energy classification interval and a target energy heat exchange mode corresponding to the industrial flue gas to be recovered; performing heat exchange treatment on the industrial flue gas to be recovered according to the energy heat exchange structure corresponding to the target energy heat exchange mode, and obtaining the waste heat energy to be stored in the industrial flue gas to be recovered;

[0007] Step S3: Setting a heat storage unit, wherein the heat storage unit is bidirectionally connected to the energy heat exchange structure; the heat storage unit is provided with a temperature-controlled heat storage gradient, wherein the temperature-controlled heat storage gradient includes at least one structural gradient, and each structural gradient corresponds to a structural gradient interval and a structural gradient medium;

[0008] Step S4: Obtaining the waste heat temperature of the waste heat energy to be stored, comparing and analyzing the waste heat temperature with the structural gradient interval to obtain a target structural gradient interval and a target storage medium corresponding to the waste heat energy to be stored; and recovering and storing the waste heat energy to be stored according to the target storage medium corresponding to the waste heat energy to be stored;

[0009] Step S5: Construct a waste heat supply and demand prediction model; obtain waste heat supply parameters and waste heat demand parameters, and obtain the waste heat supply heat of industrial flue gas based on the waste heat supply parameters and the waste heat supply and demand prediction model; obtain the waste heat demand heat based on the waste heat demand parameters and the waste heat supply and demand prediction model; and manage the waste heat energy of industrial flue gas based on the waste heat supply heat and the waste heat demand heat.

[0010] Preferably, the energy stratification system includes energy grading intervals and energy heat exchange modes corresponding to the energy grading intervals, specifically:

[0011] The energy classification intervals include a high temperature classification interval, a medium temperature classification interval and a low temperature classification interval;

[0012] The energy heat exchange mode includes radiation phase change heat exchange, swirl counter-flow enhanced heat transfer heat exchange and super hydrophilic coating condensation heat exchange;

[0013] The energy heat exchange method corresponding to the high-temperature grading interval is radiation phase change heat exchange; the energy heat exchange method corresponding to the medium-temperature grading interval is swirl counter-flow enhanced heat transfer; and the energy heat exchange method corresponding to the low-temperature grading interval is super-hydrophilic coating condensation heat exchange.

[0014] Preferably, the energy heat exchange method corresponding to the low temperature classification interval is super hydrophilic coating condensation heat exchange, specifically:

[0015] The cyclone heat exchanger is configured as a 30-degree helical angle enhanced heat transfer structure.

[0016] Preferably, the energy heat exchange structure includes a radiation heat exchanger, a cyclone heat exchanger and a compound condenser, specifically:

[0017] Performing radiant phase change heat transfer according to the radiant heat exchanger;

[0018] Performing swirl counteraction to enhance heat transfer according to the swirl heat exchanger;

[0019] The super-hydrophilic coating condensation heat exchange is carried out according to the composite condenser.

[0020] Preferably, the flue gas waste heat temperature is compared and analyzed with the energy classification interval to obtain the target energy classification interval and target energy heat exchange mode corresponding to the industrial flue gas to be recovered, specifically:

[0021] Obtaining an energy classification interval in which the flue gas waste heat temperature of the industrial flue gas to be recovered is located, and using the energy classification interval as a target classification interval for the industrial flue gas to be recovered;

[0022] The energy heat exchange mode corresponding to the target classification interval is used as the target energy heat exchange mode of the flue gas waste heat temperature.

[0023] Preferably, a heat storage unit is provided, and the heat storage unit is bidirectionally connected to the energy heat exchange structure, specifically:

[0024] Generate a radiation heat exchange node based on the radiation heat exchanger in the energy heat exchange structure; generate a cyclone heat exchange node based on the cyclone heat exchanger in the energy heat exchange structure; generate a compound condensation heat exchange node based on the compound condenser in the energy heat exchange structure;

[0025] The radiation heat exchange node, the swirl heat exchange node and the composite condensation heat exchange node are connected in series to form a series structure;

[0026] The heat storage unit is bidirectionally connected to the radiation heat exchange node, the swirl heat exchange node and the composite condensation heat exchange node.

[0027] Preferably, a heat storage unit is provided, specifically:

[0028] The energy heat exchange structure and the heat storage unit are both treated with a corrosion-resistant surface process;

[0029] The structural gradient media are all phase change materials.

[0030] Preferably, the waste heat temperature is compared and analyzed with the structural gradient interval to obtain the target structural gradient interval and target storage medium corresponding to the waste heat energy to be stored, specifically:

[0031] Obtaining a structural gradient interval where the waste heat temperature of the waste heat energy to be stored is located, and using the structural gradient interval as a target structural gradient interval for the waste heat energy to be stored;

[0032] The structural gradient medium corresponding to the target structural gradient interval is used as the target storage medium to store waste heat energy.

[0033] Preferably, step S5 is specifically:

[0034] The waste heat supply and demand prediction model includes a waste heat supply algorithm and a waste heat demand algorithm;

[0035] Obtaining the waste heat supply quantity of the industrial flue gas according to the waste heat supply parameter and the waste heat demand algorithm; obtaining the waste heat demand quantity according to the waste heat demand parameter and the waste heat demand algorithm;

[0036] and obtaining the waste heat recovery deviation energy of the industrial flue gas according to the waste heat supply energy and the waste heat demand;

[0037] If the waste heat supply energy is greater than the waste heat demand, the waste heat recovery deviation energy is stored in the energy storage unit; if the waste heat supply energy is less than the waste heat demand, the energy storage unit outputs an amount of energy equal to the waste heat recovery deviation energy.

[0038] In a second aspect of the present application, an industrial flue gas waste heat energy recovery management system is provided, which is applied to an industrial flue gas waste heat energy recovery management method, and the system includes:

[0039] Heat exchange structure setting module: used to set up the energy stratification system and energy heat exchange structure, wherein the energy stratification system corresponds to the energy heat exchange structure; wherein the energy stratification system includes energy grading intervals and energy heat exchange modes corresponding to the energy grading intervals; the energy heat exchange structure includes a radiation heat exchanger, a cyclone heat exchanger, and a compound condenser;

[0040] Waste heat energy acquisition module: used to obtain the flue gas waste heat temperature of the industrial flue gas to be recovered, compare and analyze the flue gas waste heat temperature with the energy classification interval, and obtain the target energy classification interval and target energy heat exchange mode corresponding to the industrial flue gas to be recovered; perform heat exchange treatment on the industrial flue gas to be recovered according to the energy heat exchange structure corresponding to the target energy heat exchange mode, and obtain the waste heat energy to be stored in the industrial flue gas to be recovered;

[0041] Heat storage structure setting module: used to set up a heat storage unit, the heat storage unit is bidirectionally connected to the energy heat exchange structure; the heat storage unit is provided with a temperature-controlled heat storage gradient, the temperature-controlled heat storage gradient includes at least one structural gradient, and the structural gradient corresponds to a structural gradient interval and a structural gradient medium;

[0042] Waste heat energy storage module: used to obtain the waste heat temperature of the waste heat energy to be stored, compare and analyze the waste heat temperature with the structural gradient interval, obtain the target structural gradient interval and target storage medium corresponding to the waste heat energy to be stored; and recover and store the waste heat energy to be stored according to the target storage medium corresponding to the waste heat energy to be stored;

[0043] Waste heat energy management module: used to build a waste heat supply and demand prediction model; obtain waste heat supply parameters and waste heat demand parameters, and obtain the waste heat supply heat of industrial flue gas based on the waste heat supply parameters and the waste heat supply and demand prediction model; obtain the waste heat demand heat based on the waste heat demand parameters and the waste heat supply and demand prediction model; and manage the waste heat energy of industrial flue gas based on the waste heat supply heat and the waste heat demand heat.

[0044] In summary, the beneficial effects of this application are:

[0045] 1. The present application sets up an energy stratification system and an energy heat exchange structure. The energy stratification system includes energy grading intervals and energy heat exchange methods corresponding to the energy grading intervals; wherein the energy heat exchange method corresponding to the high-temperature grading interval is radiation phase change heat transfer, the energy heat exchange method corresponding to the medium-temperature grading interval is swirl hedging enhanced heat transfer, and the energy heat exchange method corresponding to the low-temperature grading interval is super-hydrophilic coating condensation heat exchange; in addition, the energy heat exchange structure includes a radiation heat exchanger, a swirl heat exchanger and a composite condenser; an energy heat exchange method based on radiation phase change heat transfer by the radiation heat exchanger, an energy heat exchange method based on swirl hedging enhanced heat transfer by the swirl heat exchanger, and an energy heat exchange method based on super-hydrophilic coating condensation heat exchange by the composite condenser. The heat recovery rate of industrial flue gas waste heat energy is improved by the three-level energy quality matching technology.

[0046] 2. The present application obtains the waste heat temperature of the industrial flue gas to be recovered, compares and analyzes the waste heat temperature of the flue gas with the energy classification interval, and obtains the target energy classification interval and target energy heat exchange mode corresponding to the industrial flue gas to be recovered; performs heat exchange treatment on the industrial flue gas to be recovered according to the energy heat exchange structure corresponding to the target energy heat exchange mode, and obtains the waste heat energy to be stored in the industrial flue gas to be recovered; in addition, by setting a heat storage unit, the heat storage unit and the energy heat exchange structure are bidirectionally connected; the heat storage unit is provided with a temperature-controlled heat storage gradient, and the temperature-controlled heat storage gradient includes at least one structural gradient, and the structural gradients all correspond to a structural gradient interval and a structural gradient medium; by obtaining the waste heat temperature of the waste heat energy to be stored, the waste heat temperature is compared with the structural gradient interval Perform comparative analysis to obtain the target structural gradient interval and target storage medium corresponding to the waste heat energy to be stored; and recover and store the waste heat energy to be stored according to the target storage medium corresponding to the waste heat energy to be stored; finally, set up a waste heat supply and demand prediction model; obtain waste heat supply parameters and waste heat demand parameters, and obtain the waste heat supply heat of industrial flue gas according to the waste heat supply parameters and the waste heat supply and demand prediction model; obtain the waste heat demand heat according to the waste heat demand parameters and the waste heat supply and demand prediction model; and manage the waste heat energy of industrial flue gas according to the waste heat supply heat and the waste heat demand heat, so as to improve the recovery and management efficiency of industrial flue gas waste heat energy through the three-in-one technical system of "energy quality classification-dynamic energy storage-intelligent regulation". BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, some of the drawings in the embodiments of the present application will be briefly described below. It should be understood that the following drawings only show some embodiments of the present application and therefore should not be considered as limiting the scope of the present application.

[0048] Figure 1 A schematic diagram of a process for the management of industrial flue gas waste heat energy recovery provided in this application;

[0049] Figure 2This is a structural diagram of an industrial flue gas waste heat energy recovery management system provided in this application. DETAILED DESCRIPTION

[0050] Below is a combination of the embodiments and Figure 1 and Figure 2 The present application will be described in further detail, but the implementation methods of the present application are not limited thereto.

[0051] Reference Figure 1 The figure shows a flow chart of an industrial flue gas waste heat energy recovery management method provided in an embodiment of the present application.

[0052] A method for managing the recovery of waste heat energy from industrial flue gas, comprising:

[0053] Step S1: Setting an energy stratification system and an energy heat exchange structure, wherein the energy stratification system corresponds to the energy heat exchange structure; the energy stratification system includes energy grading intervals and energy heat exchange modes corresponding to the energy grading intervals; the energy heat exchange structure includes a radiation heat exchanger, a cyclone heat exchanger, and a compound condenser;

[0054] Step S2: Obtaining the flue gas waste heat temperature of the industrial flue gas to be recovered, comparing and analyzing the flue gas waste heat temperature with the energy classification interval, and obtaining a target energy classification interval and a target energy heat exchange mode corresponding to the industrial flue gas to be recovered; performing heat exchange treatment on the industrial flue gas to be recovered according to the energy heat exchange structure corresponding to the target energy heat exchange mode, and obtaining the waste heat energy to be stored in the industrial flue gas to be recovered;

[0055] Step S3: Setting a heat storage unit, the heat storage unit being bidirectionally connected to the energy heat exchange structure; the heat storage unit being provided with a temperature-controlled heat storage gradient, the temperature-controlled heat storage gradient including at least one structural gradient, each structural gradient corresponding to a structural gradient interval and a structural gradient medium;

[0056] Step S4: Obtaining the waste heat temperature of the waste heat energy to be stored, comparing and analyzing the waste heat temperature with the structural gradient interval to obtain a target structural gradient interval and a target storage medium corresponding to the waste heat energy to be stored; and recovering and storing the waste heat energy to be stored according to the target storage medium corresponding to the waste heat energy to be stored;

[0057] Step S5: Construct a waste heat supply and demand prediction model; obtain waste heat supply parameters and waste heat demand parameters, and obtain the waste heat supply heat of industrial flue gas based on the waste heat supply parameters and the waste heat supply and demand prediction model; obtain the waste heat demand heat based on the waste heat demand parameters and the waste heat supply and demand prediction model; and manage the waste heat energy of industrial flue gas based on the waste heat supply heat and the waste heat demand heat.

[0058] The energy stratification system includes energy grading intervals and energy heat exchange methods corresponding to the energy grading intervals, specifically:

[0059] The energy classification interval includes high temperature classification interval, medium temperature classification interval and low temperature classification interval;

[0060] Energy heat exchange methods include radiative phase change heat transfer, swirl counter-flow enhanced heat transfer and super-hydrophilic coating condensation heat transfer;

[0061] The energy heat exchange method corresponding to the high-temperature classification interval is radiation phase change heat transfer; the energy heat exchange method corresponding to the medium-temperature classification interval is swirl hedging enhanced heat transfer; the energy heat exchange method corresponding to the low-temperature classification interval is super-hydrophilic coating condensation heat exchange.

[0062] In some embodiments, the high-temperature classification interval can be specifically a high-temperature range (>450°C), the medium-temperature classification interval can be specifically a medium-temperature range (200-450°C), and the low-temperature classification interval can be specifically a low-temperature range (<200°C). The specific interval values ​​of the high-temperature classification interval, the medium-temperature classification interval, and the low-temperature classification interval can also be preset based on actual classification requirements.

[0063] The energy heat exchange method corresponding to the low temperature classification range is super hydrophilic coating condensation heat exchange, specifically:

[0064] The cyclone heat exchanger is set to a 30-degree helix angle to enhance the heat transfer structure.

[0065] In some embodiments, the 30° helix angle enhanced heat transfer structure of the cyclone heat exchanger is achieved by setting a guide structure (such as spiral fins, spiral grooves or spiral guide plates) with a helical angle of 30° on the heat exchange surface (such as the inner wall or outer wall of the heat exchange tube), forcing the fluid to form a rotating flow (vortex), thereby enhancing fluid disturbance, breaking the boundary layer thermal resistance, and ultimately improving the heat transfer efficiency.

[0066] The energy heat exchange structure includes a radiation heat exchanger, a cyclone heat exchanger and a compound condenser, specifically:

[0067] Radiative phase change heat transfer based on radiant heat exchanger;

[0068] Based on the cyclone heat exchanger, swirl hedging is used to enhance heat transfer;

[0069] Super hydrophilic coating condensation heat transfer is carried out based on the composite condenser.

[0070] Compare and analyze the flue gas waste heat temperature with the energy classification range to obtain the target energy classification range and target energy heat exchange mode corresponding to the industrial flue gas to be recovered, specifically:

[0071] Obtaining the energy classification interval of the flue gas waste heat temperature of the industrial flue gas to be recovered, and using the energy classification interval as the target classification interval of the industrial flue gas to be recovered;

[0072] The energy heat exchange mode corresponding to the target classification interval is used as the target energy heat exchange mode of the flue gas waste heat temperature.

[0073] A heat storage unit is provided, and the heat storage unit is bidirectionally connected to the energy heat exchange structure, specifically:

[0074] Generate a radiation heat exchange node based on the radiation heat exchanger in the energy heat exchange structure; generate a swirl heat exchange node based on the swirl heat exchanger in the energy heat exchange structure; generate a compound condensation heat exchange node based on the compound condenser in the energy heat exchange structure;

[0075] The radiation heat exchange node, the swirl heat exchange node and the composite condensation heat exchange node are connected in series to form a series structure;

[0076] The heat storage unit is bidirectionally connected to the radiation heat exchange node, the swirl heat exchange node and the compound condensation heat exchange node.

[0077] In some embodiments, the series connection direction of the series structure is from the radiation heat exchange node to the cyclone heat exchange node, and from the cyclone heat exchange node to the composite condensation heat exchange node.

[0078] Set up a heat storage unit, specifically:

[0079] The energy heat exchange structure and heat storage unit are treated with corrosion-resistant surface technology;

[0080] Structural gradient media are all phase change materials.

[0081] In some embodiments, the corrosion-resistant surface treatment process can be performed by providing a nano-Al2O3 coating to prevent the equipment life from being attenuated due to corrosive flue gas.

[0082] Compare and analyze the waste heat temperature and the structural gradient range to obtain the target structural gradient range and target storage medium corresponding to the waste heat energy to be stored, specifically:

[0083] Obtaining a structural gradient interval where the waste heat temperature of the waste heat energy to be stored is located, and using the structural gradient interval as a target structural gradient interval for the waste heat energy to be stored;

[0084] The structural gradient medium corresponding to the target structural gradient interval is used as the target storage medium for storing waste heat energy.

[0085] Step S5 is specifically as follows:

[0086] The waste heat supply and demand prediction model includes a waste heat supply algorithm and a waste heat demand algorithm;

[0087] The waste heat supply quantity of the industrial flue gas is obtained according to the waste heat supply parameter and the waste heat demand algorithm; the waste heat demand quantity is obtained according to the waste heat demand parameter and the waste heat demand algorithm;

[0088] And obtain the waste heat recovery deviation energy of industrial flue gas according to the waste heat supply energy and waste heat demand heat;

[0089] If the waste heat supply energy is greater than the waste heat demand, the waste heat recovery deviation energy is stored in the energy storage unit; if the waste heat supply energy is less than the waste heat demand, the energy storage unit outputs an amount of energy equal to the waste heat recovery deviation energy.

[0090] In some embodiments, the waste heat supply algorithm and the waste heat demand algorithm are based on the LSTM algorithm and are trained through historical waste heat supply prediction data and historical waste heat demand prediction data respectively; the waste heat supply parameters may include historical waste heat parameters, such as flue gas temperature, flow, and pressure (for example, collected every 5 minutes); production process parameters, such as blast furnace output, fuel consumption, and fan power; environmental parameters, such as atmospheric temperature, humidity and other data; historical demand data may include waste heat boiler steam production, heating / cooling load; energy-consuming equipment parameters, such as turbine power and the number of workshop heating equipment, external demand, such as surrounding enterprises' heat orders, weather forecast tables and other data.

[0091] Reference Figure 2 FIG. 1 is a schematic diagram of a structure of an industrial flue gas waste heat energy recovery management system provided in an embodiment of the present application, the system comprising:

[0092] Heat exchange structure setting module: used to set the energy stratification system and energy heat exchange structure. The energy stratification system corresponds to the energy heat exchange structure. The energy stratification system includes energy grading intervals and the energy heat exchange methods corresponding to the energy grading intervals. The energy heat exchange structure includes radiation heat exchangers, cyclone heat exchangers and compound condensers.

[0093] Waste heat energy acquisition module: used to obtain the waste heat temperature of the industrial flue gas to be recovered, compare and analyze the waste heat temperature of the flue gas with the energy classification interval, and obtain the target energy classification interval and target energy heat exchange mode corresponding to the industrial flue gas to be recovered; perform heat exchange treatment on the industrial flue gas to be recovered according to the energy heat exchange structure corresponding to the target energy heat exchange mode, and obtain the waste heat energy to be stored in the industrial flue gas to be recovered;

[0094] Heat storage structure setting module: used to set up the heat storage unit, which is bidirectionally connected to the energy heat exchange structure; the heat storage unit is provided with a temperature-controlled heat storage gradient, which includes at least one structural gradient, and each structural gradient corresponds to a structural gradient interval and a structural gradient medium;

[0095] Waste heat energy storage module: used to obtain the waste heat temperature of the waste heat energy to be stored, compare and analyze the waste heat temperature with the structural gradient interval, and obtain the target structural gradient interval and target storage medium corresponding to the waste heat energy to be stored; and recover and store the waste heat energy to be stored according to the target storage medium corresponding to the waste heat energy to be stored;

[0096] Waste heat energy management module: used to set the waste heat supply and demand prediction model; obtain waste heat supply parameters and waste heat demand parameters, and obtain the waste heat supply heat of industrial flue gas based on the waste heat supply parameters and the waste heat supply and demand prediction model; obtain the waste heat demand heat based on the waste heat demand parameters and the waste heat supply and demand prediction model; and manage the waste heat energy of industrial flue gas based on the waste heat supply heat and the waste heat demand heat.

[0097] The above are only preferred embodiments of the present application. The scope of protection of the present application is not limited to the above embodiments. All technical solutions based on the concept of the present application are within the scope of protection of the present application. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present application should also be considered within the scope of protection of the present application.

Claims

1. A method for recovering and managing waste heat from industrial flue gas, characterized in that: include: Step S1: Setting up an energy stratification system and an energy heat exchange structure, wherein the energy stratification system corresponds to the energy heat exchange structure; wherein the energy stratification system includes energy grading intervals and energy heat exchange modes corresponding to the energy grading intervals; the energy heat exchange structure includes a radiation heat exchanger, a cyclone heat exchanger, and a compound condenser; Step S2: Obtaining the flue gas waste heat temperature of the industrial flue gas to be recovered, comparing and analyzing the flue gas waste heat temperature with the energy classification interval, and obtaining a target energy classification interval and a target energy heat exchange mode corresponding to the industrial flue gas to be recovered; performing heat exchange treatment on the industrial flue gas to be recovered according to the energy heat exchange structure corresponding to the target energy heat exchange mode, and obtaining the waste heat energy to be stored in the industrial flue gas to be recovered; Step S3: Setting a heat storage unit, wherein the heat storage unit is bidirectionally connected to the energy heat exchange structure; the heat storage unit is provided with a temperature-controlled heat storage gradient, wherein the temperature-controlled heat storage gradient includes at least one structural gradient, and each structural gradient corresponds to a structural gradient interval and a structural gradient medium; Step S4: Obtaining the waste heat temperature of the waste heat energy to be stored, comparing and analyzing the waste heat temperature with the structural gradient interval to obtain a target structural gradient interval and a target storage medium corresponding to the waste heat energy to be stored; and recovering and storing the waste heat energy to be stored according to the target storage medium corresponding to the waste heat energy to be stored; Step S5: Construct a waste heat supply and demand prediction model; obtain waste heat supply parameters and waste heat demand parameters, and obtain the waste heat supply heat of industrial flue gas based on the waste heat supply parameters and the waste heat supply and demand prediction model; obtain the waste heat demand heat based on the waste heat demand parameters and the waste heat supply and demand prediction model; and manage the waste heat energy of industrial flue gas based on the waste heat supply heat and the waste heat demand heat.

2. The method for recovering and managing waste heat from industrial flue gas according to claim 1, characterized in that: The energy stratification system includes energy grading intervals and energy heat exchange modes corresponding to the energy grading intervals, specifically: The energy classification intervals include a high temperature classification interval, a medium temperature classification interval and a low temperature classification interval; The energy heat exchange mode includes radiation phase change heat exchange, swirl counter-flow enhanced heat transfer heat exchange and super hydrophilic coating condensation heat exchange; The energy heat exchange method corresponding to the high-temperature grading interval is radiation phase change heat exchange; the energy heat exchange method corresponding to the medium-temperature grading interval is swirl counter-flow enhanced heat transfer; and the energy heat exchange method corresponding to the low-temperature grading interval is super-hydrophilic coating condensation heat exchange.

3. The method for managing the recovery of waste heat from industrial flue gas according to claim 2, characterized in that: The energy heat exchange method corresponding to the low temperature classification interval is super hydrophilic coating condensation heat exchange, specifically: The cyclone heat exchanger is configured as a 30-degree helical angle enhanced heat transfer structure.

4. The method for managing the recovery of waste heat from industrial flue gas according to claim 3, characterized in that: The energy heat exchange structure includes a radiation heat exchanger, a cyclone heat exchanger and a compound condenser, specifically: Performing radiant phase change heat transfer according to the radiant heat exchanger; Performing swirl counteraction to enhance heat transfer according to the swirl heat exchanger; The super-hydrophilic coating condensation heat exchange is carried out according to the composite condenser.

5. The method for recovering and managing waste heat from industrial flue gas according to claim 4, characterized in that: The flue gas waste heat temperature is compared with the energy classification interval to obtain the target energy classification interval and target energy heat exchange mode corresponding to the industrial flue gas to be recovered, specifically: Obtaining an energy classification interval in which the flue gas waste heat temperature of the industrial flue gas to be recovered is located, and using the energy classification interval as a target classification interval for the industrial flue gas to be recovered; The energy heat exchange mode corresponding to the target classification interval is used as the target energy heat exchange mode of the flue gas waste heat temperature.

6. The industrial flue gas waste heat energy recovery management method according to claim 5, characterized in that: A heat storage unit is provided, and the heat storage unit is bidirectionally connected to the energy heat exchange structure, specifically: Generate a radiation heat exchange node based on the radiation heat exchanger in the energy heat exchange structure; generate a cyclone heat exchange node based on the cyclone heat exchanger in the energy heat exchange structure; generate a compound condensation heat exchange node based on the compound condenser in the energy heat exchange structure; The radiation heat exchange node, the swirl heat exchange node and the composite condensation heat exchange node are connected in series to form a series structure; The heat storage unit is bidirectionally connected to the radiation heat exchange node, the swirl heat exchange node and the composite condensation heat exchange node.

7. The method for managing the recovery of waste heat from industrial flue gas according to claim 6, characterized in that: Set up a heat storage unit, specifically: The energy heat exchange structure and the heat storage unit are treated with a corrosion-resistant surface process; The structural gradient media are all phase change materials.

8. The method for managing the recovery of waste heat from industrial flue gas according to claim 7, characterized in that: The residual heat temperature is compared with the structural gradient interval to obtain the target structural gradient interval and target storage medium corresponding to the residual heat energy to be stored, specifically: Obtaining a structural gradient interval where the waste heat temperature of the waste heat energy to be stored is located, and using the structural gradient interval as a target structural gradient interval for the waste heat energy to be stored; The structural gradient medium corresponding to the target structural gradient interval is used as the target storage medium to store waste heat energy.

9. The method for managing the recovery of waste heat from industrial flue gas according to claim 8, characterized in that: Step S5 is specifically as follows: The waste heat supply and demand prediction model includes a waste heat supply algorithm and a waste heat demand algorithm; Obtaining the waste heat supply quantity of the industrial flue gas according to the waste heat supply parameter and the waste heat demand algorithm; obtaining the waste heat demand quantity according to the waste heat demand parameter and the waste heat demand algorithm; and obtaining the waste heat recovery deviation energy of the industrial flue gas according to the waste heat supply energy and the waste heat demand; If the waste heat supply energy is greater than the waste heat demand, the waste heat recovery deviation energy is stored in the energy storage unit; if the waste heat supply energy is less than the waste heat demand, the energy storage unit outputs an amount of energy equal to the waste heat recovery deviation energy.

10. An industrial flue gas waste heat energy recovery management system, the system being used to implement the industrial flue gas waste heat energy recovery management method according to any one of claims 1 to 9, characterized in that: The system comprises: Heat exchange structure setting module: used to set up the energy stratification system and energy heat exchange structure, wherein the energy stratification system corresponds to the energy heat exchange structure; wherein the energy stratification system includes energy grading intervals and energy heat exchange modes corresponding to the energy grading intervals; the energy heat exchange structure includes a radiation heat exchanger, a cyclone heat exchanger, and a compound condenser; Waste heat energy acquisition module: used to obtain the flue gas waste heat temperature of the industrial flue gas to be recovered, compare and analyze the flue gas waste heat temperature with the energy classification interval, and obtain the target energy classification interval and target energy heat exchange mode corresponding to the industrial flue gas to be recovered; perform heat exchange treatment on the industrial flue gas to be recovered according to the energy heat exchange structure corresponding to the target energy heat exchange mode, and obtain the waste heat energy to be stored in the industrial flue gas to be recovered; Heat storage structure setting module: used to set up a heat storage unit, the heat storage unit is bidirectionally connected to the energy heat exchange structure; the heat storage unit is provided with a temperature-controlled heat storage gradient, the temperature-controlled heat storage gradient includes at least one structural gradient, and the structural gradient corresponds to a structural gradient interval and a structural gradient medium; Waste heat energy storage module: used to obtain the waste heat temperature of the waste heat energy to be stored, compare and analyze the waste heat temperature with the structural gradient interval, obtain the target structural gradient interval and target storage medium corresponding to the waste heat energy to be stored; and recover and store the waste heat energy to be stored according to the target storage medium corresponding to the waste heat energy to be stored; Waste heat energy management module: used to build a waste heat supply and demand prediction model; obtain waste heat supply parameters and waste heat demand parameters, and obtain the waste heat supply heat of industrial flue gas based on the waste heat supply parameters and the waste heat supply and demand prediction model; obtain the waste heat demand heat based on the waste heat demand parameters and the waste heat supply and demand prediction model; and manage the waste heat energy of industrial flue gas based on the waste heat supply heat and the waste heat demand heat.

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