A boiler waste heat system heat exchanger control method and system

Abstract

The boiler waste heat system heat exchanger control method and system disclosed by the application relate to the technical field of heat exchanger control. A time-influence factor curve is generated for a flue gas generation influencing factor, a flue gas generation analysis model is constructed, current input parameters are determined, the current input parameters are input into the flue gas generation analysis model, flue gas output parameters are generated, and based on the flue gas output parameters, a primary heat exchanger adjustment strategy is determined. According to a first difference between a real-time flue gas temperature and a standard flue gas temperature, a first stability bias adjustment is made to the primary heat exchanger adjustment strategy. According to a second difference between a boiler inlet water heat and a standard inlet water heat, a first efficiency bias adjustment is made to the primary heat exchanger adjustment strategy, a secondary heat exchanger adjustment strategy is generated, the secondary heat exchanger adjustment strategy replaces the original primary heat exchanger adjustment strategy corresponding to the flue gas output parameters, and the secondary heat exchanger adjustment strategy is corrected in real time according to real-time operation.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger control technology, and in particular to a heat exchanger control method and system for a boiler waste heat system. Background Technology

[0002] In industrial production, boilers are a commonly used heat source. To ensure efficient boiler operation, waste heat needs to be utilized, and the heat exchanger in the boiler waste heat system is a crucial component. However, traditional control methods for boiler waste heat system heat exchangers have some shortcomings. For example, because the control methods are not intelligent enough, they often cannot adjust in real time according to actual operating conditions, resulting in energy waste and poor stability. Furthermore, the difference between the boiler inlet water temperature and the standard temperature can also lead to low efficiency in the boiler waste heat system.

[0003] To address the aforementioned issues, there is an urgent need for a control method for boiler waste heat system heat exchangers that can improve the heat exchange efficiency and stability of the boiler waste heat system. Such a control method is of great significance to the development of the field of heat exchanger control technology. Summary of the Invention

[0004] The purpose of this invention is to provide a control method and system for a boiler waste heat system heat exchanger, which can effectively improve the heat exchange efficiency and stability of the heat exchanger.

[0005] The technical solution adopted in this invention is: a control method for a heat exchanger in a boiler waste heat system, comprising:

[0006] For the factors affecting flue gas generation, time-impact factor curves are generated, and a flue gas generation analysis model is constructed.

[0007] Determine the current input parameters, input the current input parameters into the flue gas generation analysis model, generate flue gas output parameters, and determine the initial heat exchanger adjustment strategy based on the flue gas output parameters;

[0008] Acquire real-time flue gas temperature data, and make a stability bias adjustment to the initial heat exchanger adjustment strategy based on the first difference between the real-time flue gas temperature and the standard flue gas temperature.

[0009] Based on the second difference between the boiler feed water heat and the standard feed water heat, an efficiency-biased adjustment is made to the primary heat exchanger adjustment strategy;

[0010] The initial heat exchanger adjustment strategy that completes one stability bias adjustment and one efficiency bias adjustment is identified as the secondary heat exchanger adjustment strategy.

[0011] The adjustment strategy for the secondary heat exchanger will be updated to replace the original adjustment strategy for the primary heat exchanger corresponding to the flue gas output parameters.

[0012] In some embodiments of this application, the method for constructing a flue gas generation analysis model for factors influencing flue gas generation includes:

[0013] Using flue gas temperature, humidity, flow rate, and velocity as influencing factors, a time-influence factor curve was constructed.

[0014] Align each curve on the time axis and correlate them at the same time points to construct an analysis model for flue gas generation.

[0015] In some embodiments of this application, the method for constructing a time-influence factor curve using flue gas temperature, humidity, flow rate, and velocity as influencing factors includes:

[0016] Determine the operating time points of the heat exchanger, and at each time point, acquire data on the flue gas temperature, humidity, flow rate, and velocity of the heat exchanger;

[0017] Based on the obtained data, a coordinate axis is plotted, with the horizontal axis representing time and the vertical axis representing the flue gas temperature, humidity, flow rate, and velocity data of the heat exchanger.

[0018] Connect the data points at each time point to construct a time-impact factor curve.

[0019] In some embodiments of this application, the method for determining current input parameters, inputting these current input parameters into a flue gas generation analysis model to generate flue gas output parameters, and determining the initial heat exchanger adjustment strategy based on the flue gas output parameters includes:

[0020] The flue gas velocity and flow rate are used as current input parameters and input into the flue gas generation analysis model to generate flue gas output parameters.

[0021] Based on the flue gas output parameters, the velocity and flow rate of the flue gas entering the heat exchanger are adjusted up and down to generate an initial heat exchanger adjustment strategy.

[0022] In some embodiments of this application, the method for obtaining real-time flue gas temperature data and making a stability bias adjustment to the initial heat exchanger adjustment strategy based on a first difference between the real-time flue gas temperature and the standard flue gas temperature includes:

[0023] Based on the first difference between the real-time flue gas temperature and the standard flue gas temperature, the opening and closing angles of the inlet and outlet valves of the heat exchanger are adjusted to adjust the real-time flue gas temperature of the heat exchanger, and a stability bias adjustment is made to the initial heat exchanger adjustment strategy.

[0024] In some embodiments of this application, the opening and closing angles of the inlet and outlet valves of the heat exchanger are adjusted according to a first difference between the real-time flue gas temperature and the standard flue gas temperature to adjust the real-time flue gas temperature of the heat exchanger, resulting in the expression:

[0025]

[0026] Where L0 is the preset opening and closing angle of the heat exchanger inlet and outlet valves, and L1 is the adjusted opening and closing angle of the heat exchanger inlet and outlet valves. max T0 is the maximum opening angle of the inlet and outlet valves of the heat exchanger, T0 is the standard flue gas temperature, T is the real-time flue gas temperature, and K0 is the set stability bias adjustment coefficient.

[0027] In some embodiments of this application, a method for making an efficiency-biased adjustment to the primary heat exchanger adjustment strategy based on a second difference between the boiler feed water heat and the standard feed water heat includes:

[0028] Based on the second difference between the boiler feed water heat and the standard feed water heat, the opening and closing angles of the heat exchanger inlet and outlet valves are adjusted within a preset range to adjust the boiler feed water heat and make an efficiency-biased adjustment to the initial heat exchanger adjustment strategy.

[0029] In some embodiments of this application, the expression for adjusting the opening and closing angles of the heat exchanger inlet and outlet valves within a preset range based on a second difference between the boiler feed water heat and the boiler feed water heat is as follows:

[0030]

[0031] Where L1 is the opening and closing angle of the heat exchanger inlet and outlet valves after stability bias adjustment, and L2 is the opening and closing angle of the heat exchanger inlet and outlet valves after efficiency bias adjustment. max T1 represents the maximum opening angle of the inlet and outlet valves of the heat exchanger, T2 represents the heat of the boiler feed water, and K1 represents the set efficiency bias adjustment coefficient.

[0032] In some embodiments of this application, it also includes:

[0033] Based on the real-time flue gas temperature data and boiler feed water heat, the first difference between the real-time flue gas temperature and the standard flue gas temperature and the second difference between the boiler feed water heat and the standard feed water heat are determined, and the adjustment strategy of the secondary heat exchanger is corrected in real time according to the first difference and the second difference.

[0034] In some embodiments of this application, a boiler waste heat system heat exchanger control system is also disclosed, comprising:

[0035] The flue gas generation analysis model generation module is used to generate time-impact factor curves for factors affecting flue gas generation and to construct a flue gas generation analysis model.

[0036] The primary heat exchanger adjustment strategy generation module is used to determine the current input parameters, input the current input parameters into the flue gas generation analysis model, generate flue gas output parameters, and determine the primary heat exchanger adjustment strategy based on the flue gas output parameters.

[0037] The secondary heat exchanger adjustment strategy generation module is used to acquire real-time flue gas temperature data and make a stability bias adjustment to the primary heat exchanger adjustment strategy based on the first difference between the real-time flue gas temperature and the standard flue gas temperature.

[0038] Based on the second difference between the boiler feed water heat and the standard feed water heat, an efficiency-biased adjustment is made to the primary heat exchanger adjustment strategy;

[0039] The initial heat exchanger adjustment strategy that completes one stability bias adjustment and one efficiency bias adjustment is identified as the secondary heat exchanger adjustment strategy.

[0040] The secondary heat exchanger adjustment strategy correction module is used to determine the first difference between the real-time flue gas temperature and the standard flue gas temperature and the second difference between the boiler inlet water heat and the standard inlet water heat based on the real-time flue gas temperature data and boiler inlet water heat obtained in real time, and to correct the secondary heat exchanger adjustment strategy in real time based on the first difference and the second difference.

[0041] The beneficial effects of this invention are:

[0042] 1. For the factors affecting flue gas generation, generate time-influence factor curves and construct a flue gas generation analysis model. Analyze the flue gas generation analysis model to determine the adjustment strategy for the primary heat exchanger and effectively adjust it in real time according to the current factors affecting flue gas generation.

[0043] 2. Make one stability-biased adjustment and one efficiency-biased adjustment to the primary heat exchanger adjustment strategy to generate a secondary heat exchanger adjustment strategy, and make real-time corrections to the secondary heat exchanger adjustment strategy to effectively improve the heat exchange efficiency and stability of the heat exchanger.

[0044] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0045] Figure 1 This is a schematic diagram illustrating the steps of a boiler waste heat system heat exchanger control method in an embodiment of this application;

[0046] Figure 2 This is a schematic diagram of the module connection of a boiler waste heat system heat exchanger control system according to an embodiment of this application. Detailed Implementation

[0047] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0048] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. It should be understood that the preferred embodiments described herein are only for illustration and explanation of the present invention and should not be construed as limiting the scope of protection of the present invention. Those skilled in the art can make some non-essential improvements and adjustments based on the following content of the present invention. In this invention, unless otherwise expressly specified and limited, the technical terms used in this application should have the ordinary meaning understood by those skilled in the art.

[0049] Example:

[0050] The purpose of this invention is to provide a method and system for controlling a heat exchanger in a boiler waste heat system.

[0051] A method for controlling a heat exchanger in a boiler waste heat system includes:

[0052] S1: Generate time-impact factor curves for the factors affecting flue gas generation and construct a flue gas generation analysis model;

[0053] It is important to understand that: flue gas generation influencing factors refer to factors that affect the flue gas in the heat exchanger. It is necessary to analyze the flue gas generation influencing factors, construct a flue gas generation analysis model, and then conduct further analysis based on the flue gas generation analysis model.

[0054] S2: Determine the current input parameters, input the current input parameters into the flue gas generation analysis model, generate flue gas output parameters, and determine the initial heat exchanger adjustment strategy based on the flue gas output parameters;

[0055] It is important to understand that: from all the parameters currently operating in the heat exchanger, one parameter is selected as the flue gas output parameter, and the remaining parameters are used as the current input parameters. The current input parameters are then input into the flue gas generation analysis model to predict the flue gas output parameters. Based on the predicted values ​​of the flue gas output parameters, the initial heat exchanger adjustment strategy is determined.

[0056] S3: Obtain real-time flue gas temperature data, and make a stability bias adjustment to the initial heat exchanger adjustment strategy based on the first difference between the real-time flue gas temperature and the standard flue gas temperature.

[0057] Based on the second difference between the boiler feed water heat and the standard feed water heat, an efficiency-biased adjustment is made to the primary heat exchanger adjustment strategy;

[0058] The initial heat exchanger adjustment strategy that completes one stability bias adjustment and one efficiency bias adjustment is identified as the secondary heat exchanger adjustment strategy.

[0059] The adjustment strategy for the secondary heat exchanger will be updated to replace the original adjustment strategy for the primary heat exchanger corresponding to the flue gas output parameters.

[0060] In some embodiments of this application, the method for constructing a flue gas generation analysis model for factors influencing flue gas generation includes:

[0061] Using flue gas temperature, humidity, flow rate, and velocity as influencing factors, a time-influence factor curve was constructed.

[0062] Align each curve on the time axis and correlate them at the same time points to construct an analysis model for flue gas generation.

[0063] In some embodiments of this application, the method for constructing a time-influence factor curve using flue gas temperature, humidity, flow rate, and velocity as influencing factors includes:

[0064] Determine the operating time points of the heat exchanger, and at each time point, acquire data on the flue gas temperature, humidity, flow rate, and velocity of the heat exchanger;

[0065] Based on the obtained data, a coordinate axis is plotted, with the horizontal axis representing time and the vertical axis representing the flue gas temperature, humidity, flow rate, and velocity data of the heat exchanger.

[0066] Connect the data points at each time point to construct a time-impact factor curve.

[0067] In some embodiments of this application, the method for determining current input parameters, inputting these current input parameters into a flue gas generation analysis model to generate flue gas output parameters, and determining the initial heat exchanger adjustment strategy based on the flue gas output parameters includes:

[0068] The flue gas velocity and flow rate are used as current input parameters and input into the flue gas generation analysis model to generate flue gas output parameters.

[0069] Based on the flue gas output parameters, the velocity and flow rate of the flue gas entering the heat exchanger are adjusted up and down to generate an initial heat exchanger adjustment strategy.

[0070] In some embodiments of this application, the method for obtaining real-time flue gas temperature data and making a stability bias adjustment to the initial heat exchanger adjustment strategy based on a first difference between the real-time flue gas temperature and the standard flue gas temperature includes:

[0071] Based on the first difference between the real-time flue gas temperature and the standard flue gas temperature, the opening and closing angles of the inlet and outlet valves of the heat exchanger are adjusted to adjust the real-time flue gas temperature of the heat exchanger, and a stability bias adjustment is made to the initial heat exchanger adjustment strategy.

[0072] In some embodiments of this application, the opening and closing angles of the inlet and outlet valves of the heat exchanger are adjusted according to a first difference between the real-time flue gas temperature and the standard flue gas temperature to adjust the real-time flue gas temperature of the heat exchanger, resulting in the expression:

[0073]

[0074] Where L0 is the preset opening and closing angle of the heat exchanger inlet and outlet valves, and L1 is the adjusted opening and closing angle of the heat exchanger inlet and outlet valves. max T0 is the maximum opening angle of the inlet and outlet valves of the heat exchanger, T0 is the standard flue gas temperature, T is the real-time flue gas temperature, and K0 is the set stability bias adjustment coefficient.

[0075] It is important to understand that K0 in the formula is a stability bias adjustment coefficient that is artificially set based on stability adjustment requirements. This includes converting (T-T0) into a value similar to... and The same dimensional relationship, and and Perform the calculations within the same formula.

[0076] In some embodiments of this application, a method for making an efficiency-biased adjustment to the primary heat exchanger adjustment strategy based on a second difference between the boiler feed water heat and the standard feed water heat includes:

[0077] Based on the second difference between the boiler feed water heat and the standard feed water heat, the opening and closing angles of the heat exchanger inlet and outlet valves are adjusted within a preset range to adjust the boiler feed water heat and make an efficiency-biased adjustment to the initial heat exchanger adjustment strategy.

[0078] In some embodiments of this application, the expression for adjusting the opening and closing angles of the heat exchanger inlet and outlet valves within a preset range based on a second difference between the boiler feed water heat and the boiler feed water heat is as follows:

[0079]

[0080] Where L1 is the opening and closing angle of the heat exchanger inlet and outlet valves after stability bias adjustment, and L2 is the opening and closing angle of the heat exchanger inlet and outlet valves after efficiency bias adjustment. max T1 represents the maximum opening angle of the inlet and outlet valves of the heat exchanger, T2 represents the heat of the boiler feed water, and K1 represents the set efficiency bias adjustment coefficient.

[0081] It is important to understand that K1 in the formula is an efficiency-biased adjustment coefficient artificially set based on efficiency adjustment requirements. This includes converting (T2-T1) into a value similar to... and The same dimensional relationship, and and Perform the calculations within the same formula.

[0082] In some embodiments of this application, it also includes:

[0083] Based on the real-time flue gas temperature data and boiler feed water heat, the first difference between the real-time flue gas temperature and the standard flue gas temperature and the second difference between the boiler feed water heat and the standard feed water heat are determined, and the adjustment strategy of the secondary heat exchanger is corrected in real time according to the first difference and the second difference.

[0084] In some embodiments of this application, a boiler waste heat system heat exchanger control system is also disclosed, including: a flue gas generation analysis model generation module, a primary heat exchanger adjustment strategy generation module, a secondary heat exchanger adjustment strategy generation module, and a secondary heat exchanger adjustment strategy correction module.

[0085] The flue gas generation analysis model generation module is used to generate time-influence factor curves for factors affecting flue gas generation and to construct a flue gas generation analysis model.

[0086] The primary heat exchanger adjustment strategy generation module is used to determine the current input parameters, input the current input parameters into the flue gas generation analysis model, generate flue gas output parameters, and determine the primary heat exchanger adjustment strategy based on the flue gas output parameters.

[0087] The secondary heat exchanger adjustment strategy generation module is used to acquire real-time flue gas temperature data and make a stability bias adjustment to the primary heat exchanger adjustment strategy based on the first difference between the real-time flue gas temperature and the standard flue gas temperature.

[0088] Based on the second difference between the boiler feed water heat and the standard feed water heat, an efficiency-biased adjustment is made to the primary heat exchanger adjustment strategy;

[0089] The initial heat exchanger adjustment strategy that completes one stability bias adjustment and one efficiency bias adjustment is identified as the secondary heat exchanger adjustment strategy.

[0090] The secondary heat exchanger adjustment strategy correction module is used to determine the first difference between the real-time flue gas temperature and the standard flue gas temperature and the second difference between the boiler inlet water heat and the standard inlet water heat based on the real-time flue gas temperature data and boiler inlet water heat obtained in real time, and to correct the secondary heat exchanger adjustment strategy in real time based on the first difference and the second difference.

[0091] The beneficial effects of this invention are:

[0092] 1. For the factors affecting flue gas generation, generate time-influence factor curves and construct a flue gas generation analysis model. Analyze the flue gas generation analysis model to determine the adjustment strategy for the primary heat exchanger and effectively adjust it in real time according to the current factors affecting flue gas generation.

[0093] 2. Make one stability-biased adjustment and one efficiency-biased adjustment to the primary heat exchanger adjustment strategy to generate a secondary heat exchanger adjustment strategy, and make real-time corrections to the secondary heat exchanger adjustment strategy to effectively improve the heat exchange efficiency and stability of the heat exchanger.

[0094] 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for controlling a heat exchanger in a boiler waste heat system, characterized in that, include: For the factors influencing flue gas generation, time-influence factor curves are generated, and a flue gas generation analysis model is constructed. This includes: using flue gas temperature, humidity, flow rate, and velocity as influencing factors to construct time-influence factor curves; aligning each curve on the time axis and correlating them at the same time points to construct a flue gas generation analysis model. The construction of the time-influence factor curve includes: determining the working time nodes of the heat exchanger; at each time node, acquiring the flue gas temperature, humidity, flow rate, and velocity data of the heat exchanger; based on the acquired data, plotting a coordinate axis, with the horizontal axis representing time and the vertical axis representing the flue gas temperature, humidity, flow rate, and velocity data of the heat exchanger; and connecting the data points at each time node to construct the time-influence factor curve. The process involves determining the current input parameters, inputting these parameters into the flue gas generation analysis model to generate flue gas output parameters, and then determining the initial heat exchanger adjustment strategy based on these parameters. Specifically, this includes: inputting the flue gas velocity and flow rate as current input parameters into the flue gas generation analysis model to generate flue gas output parameters; and adjusting the flue gas velocity and flow rate entering the heat exchanger according to the flue gas output parameters to generate the initial heat exchanger adjustment strategy. Acquire real-time flue gas temperature data, and make a stability bias adjustment to the initial heat exchanger adjustment strategy based on the first difference between the real-time flue gas temperature and the standard flue gas temperature; specifically, adjust the opening and closing angles of the inlet and outlet valves of the heat exchanger based on the first difference between the real-time flue gas temperature and the standard flue gas temperature to adjust the real-time flue gas temperature of the heat exchanger and make a stability bias adjustment to the initial heat exchanger adjustment strategy. Based on the second difference between the boiler feed water heat and the standard feed water heat, an efficiency bias adjustment is made to the primary heat exchanger adjustment strategy; specifically, based on the second difference between the boiler feed water heat and the standard feed water heat, the opening and closing angles of the heat exchanger inlet and outlet valves are adjusted within a preset range, thereby adjusting the boiler feed water heat and making an efficiency bias adjustment to the primary heat exchanger adjustment strategy. The initial heat exchanger adjustment strategy that completes one stability bias adjustment and one efficiency bias adjustment is identified as the secondary heat exchanger adjustment strategy. The adjustment strategy for the secondary heat exchanger will be updated to replace the original adjustment strategy for the primary heat exchanger corresponding to the flue gas output parameters.

2. The method for controlling a boiler waste heat system heat exchanger according to claim 1, characterized in that, Based on the first difference between the real-time flue gas temperature and the standard flue gas temperature, the opening and closing angles of the inlet and outlet valves of the heat exchanger are adjusted to regulate the real-time flue gas temperature of the heat exchanger, resulting in the following expression: ； in, The preset opening and closing angles of the heat exchanger inlet and outlet valves. The adjusted opening and closing angles of the heat exchanger inlet and outlet valves. This refers to the maximum opening and closing angle of the inlet and outlet valves of the heat exchanger. Standard flue gas temperature, For real-time flue gas temperature, This is the set stability bias adjustment coefficient.

3. The method for controlling a boiler waste heat system heat exchanger according to claim 2, characterized in that, Based on the second difference between the boiler feed water heat and the boiler feed water heat, the expression for adjusting the opening and closing angles of the heat exchanger inlet and outlet valves within a preset range is as follows: ； in, The opening and closing angles of the heat exchanger inlet and outlet valves were adjusted to improve stability. The opening and closing angles of the heat exchanger inlet and outlet valves are adjusted to optimize efficiency. This refers to the maximum opening and closing angle of the inlet and outlet valves of the heat exchanger. For the heat of the boiler inlet water, For the heat of the boiler feed water, The efficiency bias adjustment coefficient is set.

4. The method for controlling a boiler waste heat system heat exchanger according to claim 1, characterized in that, Also includes: Based on the real-time flue gas temperature data and boiler feed water heat, the first difference between the real-time flue gas temperature and the standard flue gas temperature and the second difference between the boiler feed water heat and the standard feed water heat are determined, and the adjustment strategy of the secondary heat exchanger is corrected in real time according to the first difference and the second difference.

5. A control system for a boiler waste heat system heat exchanger, characterized in that, include: The flue gas generation analysis model generation module is used to generate time-influence factor curves for factors affecting flue gas generation and to construct a flue gas generation analysis model. This includes: using flue gas temperature, humidity, flow rate, and velocity as influencing factors to construct time-influence factor curves; aligning each curve on the time axis and correlating them at the same time points to construct the flue gas generation analysis model; the construction of the time-influence factor curves includes: determining the heat exchanger's operating time points; acquiring flue gas temperature, humidity, flow rate, and velocity data at each time point; plotting coordinate axes based on the acquired data, with the horizontal axis representing time and the vertical axis representing the flue gas temperature, humidity, flow rate, and velocity data of the heat exchanger; and connecting the data points at each time point to construct the time-influence factor curve. The primary heat exchanger adjustment strategy generation module is used to determine the current input parameters, input the current input parameters into the flue gas generation analysis model to generate flue gas output parameters, and determine the primary heat exchanger adjustment strategy based on the flue gas output parameters. Specifically, it includes: inputting the flue gas velocity and flow rate as current input parameters into the flue gas generation analysis model to generate flue gas output parameters; and adjusting the flue gas velocity and flow rate entering the heat exchanger according to the flue gas output parameters to generate the primary heat exchanger adjustment strategy. The secondary heat exchanger adjustment strategy generation module is used to acquire real-time flue gas temperature data and make a stability bias adjustment to the primary heat exchanger adjustment strategy based on the first difference between the real-time flue gas temperature and the standard flue gas temperature. Specifically, it includes adjusting the opening and closing angles of the heat exchanger inlet and outlet valves based on the first difference between the real-time flue gas temperature and the standard flue gas temperature to adjust the real-time flue gas temperature of the heat exchanger and make a stability bias adjustment to the primary heat exchanger adjustment strategy. Based on the second difference between the boiler feed water heat and the standard feed water heat, an efficiency bias adjustment is made to the primary heat exchanger adjustment strategy; specifically, based on the second difference between the boiler feed water heat and the standard feed water heat, the opening and closing angles of the heat exchanger inlet and outlet valves are adjusted within a preset range, thereby adjusting the boiler feed water heat and making an efficiency bias adjustment to the primary heat exchanger adjustment strategy. The initial heat exchanger adjustment strategy that completes one stability bias adjustment and one efficiency bias adjustment is identified as the secondary heat exchanger adjustment strategy. The secondary heat exchanger adjustment strategy correction module is used to determine the first difference between the real-time flue gas temperature and the standard flue gas temperature and the second difference between the boiler inlet water heat and the standard inlet water heat based on the real-time flue gas temperature data and boiler inlet water heat obtained in real time, and to correct the secondary heat exchanger adjustment strategy in real time based on the first difference and the second difference.

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