Molten salt heat exchanger suitable for high-temperature and high-pressure medium and ventilation control system of molten salt heat exchanger

Abstract

The invention belongs to the field of fused salt heat exchangers, and relates to a data analysis technology, in particular to a fused salt heat exchanger suitable for a high-temperature and high-pressure medium and a ventilation control system of the fused salt heat exchanger. The efficiency monitoring module is used for performing heat exchange efficiency analysis on the molten salt heat exchanger: generating a monitoring period, marking a complete operation process of the molten salt heat exchanger in the monitoring period as a heat exchange process, and marking the heat exchange process as a low-efficiency process or an analysis process through an efficiency coefficient XL; according to the method, heat exchange efficiency analysis is carried out on the molten salt heat exchanger, efficiency analysis is carried out on each complete operation process to obtain an efficiency coefficient, so that the heat exchange efficiency of the molten salt heat exchanger is evaluated through the efficiency coefficient, and data support is provided for a parameter analysis process and an efficiency optimization process according to an evaluation result.

Description

Technical Field

[0001] The present invention belongs to the field of molten salt heat exchangers and relates to data analysis technology, in particular to a molten salt heat exchanger suitable for high-temperature and high-pressure media and a ventilation control system thereof. Background Art

[0002] Molten salt heat exchangers play a key role in CSP plants. They are used to transfer heat obtained from the solar field to water vapor, generate superheated steam, and then drive steam turbines to generate electricity. This process involves multiple steps and components, which together constitute the core technology of salt tower CSP plants.

[0003] However, the molten salt heat exchanger in the prior art can only monitor its heat exchange efficiency, and cannot optimize and control its heat exchange efficiency according to parameters such as the fluid's own parameters and the air duct opening, resulting in the heat exchange efficiency of the molten salt heat exchanger cannot be optimized.

[0004] In view of the above technical problems, this application proposes a solution. Summary of the invention

[0005] The purpose of the present invention is to provide a molten salt heat exchanger suitable for high-temperature and high-pressure media and a ventilation control system thereof, so as to solve the problem in the prior art that the heat exchange efficiency cannot be optimized and controlled according to parameters such as the fluid's own parameters and the air duct opening.

[0006] The technical problem to be solved by the present invention is: how to provide a molten salt heat exchanger and a ventilation control system suitable for high-temperature and high-pressure media, which can optimize the heat exchange efficiency according to the fluid's own parameters and parameters such as the air duct opening.

[0007] The object of the present invention can be achieved by the following technical solutions: A ventilation control system for a molten salt heat exchanger for high temperature and high pressure media, comprising an efficiency monitoring module, a parameter analysis module and an efficiency optimization module; The efficiency monitoring module is used to analyze the heat exchange efficiency of the molten salt heat exchanger: generate a monitoring cycle, mark the complete operation process of the lava heat exchanger within the monitoring cycle as a heat exchange process, obtain the overall data ZT and the stable data PW of the heat exchange process; obtain the efficiency coefficient XL of the heat exchange process by numerically calculating the overall data ZT and the stable data PW; mark the heat exchange process as an inefficient process or an analysis process according to the efficiency coefficient XL; The parameter analysis module is used to analyze the fluid parameters of the molten salt heat exchanger and mark the analysis parameters and the control parameters; The efficiency optimization module includes a control optimization unit and a regulation optimization unit, wherein the control optimization unit is used to perform control optimization analysis on the molten salt heat exchanger and obtain a control optimization range; The control optimization module is used to optimize and analyze the control parameters of the molten salt heat exchanger and obtain the control optimization range.

[0008] Furthermore, the process of obtaining the overall data ZT and the steady data PW of the heat exchange process includes: dividing the heat exchange process into several heat exchange time periods, obtaining the average values ​​of the fluid temperatures at the hot salt outlet and the hot salt inlet in the heat exchange time period and marking them as heat output value and heat input value respectively, marking the difference between the heat output value and the heat input value as the heat exchange value of the heat exchange time period, marking the ratio of the heat exchange value to the duration value of the heat exchange time period as the heat transfer coefficient of the heat exchange time period, summing and averaging the heat transfer coefficients of all heat exchange time periods in the heat exchange process to obtain the overall data ZT of the heat exchange process, and performing variance calculation on the heat transfer coefficients of all heat exchange time periods in the heat exchange process to obtain the steady data PW of the heat exchange process.

[0009] Furthermore, the specific process of marking the heat exchange process as an inefficient process or an analysis process includes: comparing the efficiency coefficient XL of the heat exchange process with the preset efficiency threshold XLmin: if the efficiency coefficient XL is less than or equal to the efficiency threshold XLmin, it is determined that the heat exchange efficiency of the heat exchange process does not meet the requirements, and the corresponding heat exchange process is marked as an inefficient process, generating an equipment maintenance signal and sending the equipment maintenance signal to the mobile phone terminal of the administrator; if the efficiency coefficient XL is greater than the efficiency threshold XLmin, it is determined that the heat exchange efficiency of the heat exchange process meets the requirements, and the corresponding heat exchange process is marked as an analysis process.

[0010] Furthermore, the specific process of the parameter analysis module analyzing the fluid parameters of the molten salt heat exchanger includes: at the end of the monitoring period, marking the initial temperature value and initial density value of the molten salt fluid corresponding to the analysis process within the monitoring period as fluid parameters, performing variance calculation on the initial temperature values ​​of all analysis processes to obtain the temperature control value, performing variance calculation on the initial density values ​​of all analysis processes to obtain the density control value, comparing the temperature control value with the density control value and marking the analysis parameters and the control parameters through the comparison results.

[0011] Furthermore, the specific process of comparing the temperature control value with the density control value includes: if the temperature control value is less than or equal to the density control value, the initial temperature value and the initial density value are marked as the control parameter and the analysis parameter respectively; if the temperature control value is greater than the density control value, the initial temperature value and the initial density value are marked as the analysis parameter and the control parameter respectively.

[0012] Furthermore, the control optimization unit performs control optimization analysis on the molten salt heat exchanger: the analysis range is composed of the maximum value and the minimum value of the analysis parameter of the analysis process within the monitoring period, the analysis range is divided into several analysis intervals, the analysis process whose analysis parameters are within the analysis interval is marked as the matching process of the analysis interval, the matching processes within the analysis interval are arranged in descending order according to the efficiency coefficient XL value to obtain an efficiency sequence, and the efficiency sequence is sent to the control optimization unit.

[0013] Furthermore, the process of acquiring the control optimization range includes: intercepting the first L1 matching processes from the efficiency sequence and marking them as control optimization processes, the control optimization range of the analysis interval is composed of the maximum and minimum values ​​of the damper opening of the air flow channel of the control optimization process, and the control optimization range is sent to the efficiency monitoring module.

[0014] Furthermore, the first L2 matching processes are intercepted from the efficiency sequence and marked as control optimization processes. The maximum and minimum values ​​of the control parameters of the control optimization process constitute the control optimization range of the analysis interval, and the control optimization range is sent to the mobile phone terminal of the manager.

[0015] Among them, the present invention also proposes a molten salt heat exchanger suitable for high-temperature and high-pressure media, including a shell, tube end sealing plates are fixedly installed on both sides of the shell, and evenly distributed gas plates are arranged on the top of the shell. Heat exchange tubes are arranged between the tube end sealing plates on both sides, and the heat exchange tubes include straight tubes and semi-bent tubes connected to the straight tubes. A hot salt inlet, a hot salt outlet, a cold salt inlet and a cold salt outlet are arranged on one side of the shell; a plurality of cold salt channels are arranged between the cold salt inlet and the cold salt outlet; bottom foot pads are installed at the four corners of the bottom of the shell.

[0016] The present invention has the following beneficial effects: 1. The efficiency monitoring module can be used to analyze the heat exchange efficiency of the molten salt heat exchanger. The efficiency coefficient can be obtained by analyzing the efficiency of each complete operation process, so as to evaluate the heat exchange efficiency of the molten salt heat exchanger through the efficiency coefficient, and differentiate the heat exchange process. The marking results provide data support for the parameter analysis process and efficiency optimization process; 2. The parameter analysis module can be used to analyze the fluid parameters of the molten salt heat exchanger. After the monitoring period, the initial parameters of the molten salt fluid in each analysis process are counted, and the analysis parameters and control parameters are marked according to the temperature control value and the density control value. The analysis parameters are used as the analysis basis, and the control parameters are used as the control optimization object to optimize the control of the molten salt heat exchanger to improve its heat exchange efficiency. 3. The efficiency optimization module can be used to perform control optimization analysis and regulation parameter optimization analysis on the molten salt heat exchanger. When the molten salt heat exchanger is running, the initial values ​​of the analysis parameters of the molten salt heat exchanger are first obtained, and then the control optimization range and regulation optimization range of the corresponding analysis interval are called up. According to the control optimization range and regulation optimization range, the corresponding parameters are controlled so that the molten salt heat exchanger can operate in the best state and ensure its heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 For the present invention Figure 1 K-direction schematic diagram in ; Figure 3 is a system block diagram of Embodiment 2 of the present invention; Figure 4 This is a system block diagram of Embodiment 3 of the present invention. Figure 5 This is a flow chart of the method of embodiment 4 of the present invention.

[0019] In the figure: 1. Shell; 2. Tube end sealing plate; 3. Gas plate; 4. Straight tube; 5. Half-bend tube; 6. Bottom foot pad. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The molten salt heat exchanger mainly uses molten salt as a heat carrier, and achieves efficient and energy-saving heat energy transfer by exchanging heat with low-pressure saturated steam. This system consists of a heat exchanger, a steam generator, a molten salt pump, a control system, etc. Specifically, low-pressure saturated steam enters the heat exchanger and exchanges heat with the molten salt to increase the temperature of the molten salt. Subsequently, the high-temperature molten salt passes through the steam generator to generate low-pressure saturated steam, which continues to participate in heat exchange. After multiple cycles, efficient transfer of thermal energy is achieved. This system has been widely used in industrial production, especially in the chemical, metallurgical, building materials and other industries, and has achieved remarkable results.

[0022] Embodiment 1: Figure 1-2 As shown, a molten salt heat exchanger suitable for high-temperature and high-pressure media includes a shell 1, tube end sealing plates 2 are fixedly installed on both sides of the shell 1, and a uniformly distributed gas plate 3 is arranged on the top of the shell 1. Heat exchange tubes are arranged between the tube end sealing plates 2 on both sides. The heat exchange tubes include straight tubes 4 and semi-bent tubes 5 connected to the straight tubes 4. A hot salt inlet, a hot salt outlet, a cold salt inlet and a cold salt outlet are arranged on one side of the shell 1; a plurality of cold salt channels are arranged between the cold salt inlet and the cold salt outlet; bottom foot pads 6 are installed at the four corners of the bottom of the shell 1.

[0023] Embodiment 2: Figure 3 As shown, a ventilation control system for a molten salt heat exchanger suitable for high-temperature and high-pressure media includes an efficiency monitoring module, a parameter analysis module and an efficiency optimization module, and the efficiency monitoring module, the parameter analysis module and the efficiency optimization module are communicatively connected in sequence.

[0024] The efficiency monitoring module is used to analyze the heat exchange efficiency of the molten salt heat exchanger: generate a monitoring cycle, mark the complete operation process of the lava heat exchanger within the monitoring cycle as the heat exchange process, divide the heat exchange process into several heat exchange periods, obtain the average fluid temperature of the hot salt outlet and the hot salt inlet within the heat exchange period and mark them as the heat output value and heat input value respectively, mark the difference between the heat output value and the heat input value as the heat exchange value of the heat exchange period, mark the ratio of the heat exchange value to the duration of the heat exchange period as the heat exchange coefficient of the heat exchange period, sum and average the heat exchange coefficients of all heat exchange periods in the heat exchange process to obtain the overall data ZT of the heat exchange process, and calculate the variance of the heat exchange coefficients of all heat exchange periods in the heat exchange process to obtain the stable data PW of the heat exchange process; By formula The efficiency coefficient XL of the heat exchange process is obtained, where m1 and m2 are both proportional coefficients, and m1>m2>1, and u is a correction factor, and the value of u is 2.75; the efficiency coefficient XL of the heat exchange process is compared with the preset efficiency threshold XLmin: if the efficiency coefficient XL is less than or equal to the efficiency threshold XLmin, it is determined that the heat exchange efficiency of the heat exchange process does not meet the requirements, and the corresponding heat exchange process is marked as an inefficient process, and an equipment maintenance signal is generated and sent to the mobile phone terminal of the administrator; if the efficiency coefficient XL is greater than the efficiency threshold XLmin, it is determined that the heat exchange efficiency of the heat exchange process meets the requirements, and the corresponding heat exchange process is marked as an analysis process; The heat transfer efficiency of the molten salt heat exchanger is analyzed, and the efficiency analysis of each complete operation process is performed to obtain the efficiency coefficient. The heat transfer efficiency of the molten salt heat exchanger is evaluated through the efficiency coefficient, and the heat transfer process is differentiated and marked. The marking results provide data support for the parameter analysis process and efficiency optimization process.

[0025] The parameter analysis module is used to analyze the fluid parameters of the molten salt heat exchanger: at the end of the monitoring period, the initial temperature value and initial density value of the molten salt fluid corresponding to the analysis process in the monitoring period are marked as fluid parameters, the variance of the initial temperature values ​​of all analysis processes is calculated to obtain the temperature control value, the variance of the initial density values ​​of all analysis processes is calculated to obtain the density control value, and the temperature control value is compared with the density control value: If the temperature control value is less than or equal to the density control value, the initial temperature value and the initial density value are marked as the control parameter and the analysis parameter respectively; if the temperature control value is greater than the density control value, the initial temperature value and the initial density value are marked as the analysis parameter and the control parameter respectively; the fluid parameters of the molten salt heat exchanger are analyzed, and after the monitoring period, the initial parameters of the molten salt fluid in each analysis process are statistically analyzed, and the analysis parameters and the control parameters are marked according to the temperature control value and the density control value. The analysis parameters are used as the analysis basis, and the control parameters are used as the control optimization object, so as to optimize the control of the molten salt heat exchanger to improve its heat exchange efficiency.

[0026] Embodiment 3: Figure 4 As shown, the efficiency optimization module includes a control optimization unit and a regulation optimization unit. The control optimization unit is used to perform control optimization analysis on the molten salt heat exchanger: the analysis range is composed of the maximum value and the minimum value of the analysis parameter of the analysis process within the monitoring period, the analysis range is divided into several analysis intervals, the analysis process whose analysis parameter is within the analysis interval is marked as the matching process of the analysis interval, the matching processes in the analysis interval are arranged in descending order according to the efficiency coefficient XL value to obtain an efficiency sequence, the efficiency sequence is sent to the regulation optimization unit, the front L1 matching processes are intercepted from the efficiency sequence and marked as the control optimization process, the control optimization range of the analysis interval is composed of the maximum value and the minimum value of the damper opening of the air flow channel of the control optimization process, and the control optimization range is sent to the efficiency monitoring module.

[0027] The control optimization module is used to optimize and analyze the control parameters of the molten salt heat exchanger: the first L2 matching processes are intercepted from the efficiency sequence and marked as control optimization processes, and the maximum and minimum values ​​of the control parameters of the control optimization process constitute the control optimization range of the analysis interval, and the control optimization range is sent to the mobile phone terminal of the manager; control optimization analysis and control parameter optimization analysis are performed on the molten salt heat exchanger. When the molten salt heat exchanger is running, the initial values ​​of the analysis parameters of the molten salt heat exchanger are first obtained, and then the control optimization range and control optimization range of the corresponding analysis interval are called up, and the corresponding parameters are controlled according to the control optimization range and the control optimization range, so that the molten salt heat exchanger can operate in the best state and ensure its heat exchange efficiency.

[0028] Embodiment 4: Figure 5 As shown, the present invention also proposes a ventilation control method for a molten salt heat exchanger suitable for high-temperature and high-pressure media, comprising the following steps: Step 1: Analyze the heat exchange efficiency of the molten salt heat exchanger: generate a monitoring cycle, mark the complete operation process of the molten salt heat exchanger within the monitoring cycle as a heat exchange process, obtain the efficiency coefficient XL of the heat exchange process, and mark the heat exchange process as an inefficient process or an analysis process through the efficiency coefficient XL; Step 2: Analyze the fluid parameters of the molten salt heat exchanger: At the end of the monitoring period, perform variance calculation on the initial temperature values ​​of all analysis processes to obtain the temperature control value, perform variance calculation on the initial density values ​​of all analysis processes to obtain the density control value, compare the temperature control value with the density control value, and mark the analysis parameters and the control parameters through the comparison results; Step 3: Perform control optimization analysis on the molten salt heat exchanger and obtain the control optimization range of the analysis interval; Step 4: Optimize and analyze the control parameters of the molten salt heat exchanger and obtain the control optimization range of the analysis interval.

[0029] The molten salt heat exchanger and ventilation control system suitable for high-temperature and high-pressure media generate a monitoring cycle during operation, mark the complete operation process of the lava heat exchanger within the monitoring cycle as a heat exchange process, obtain the efficiency coefficient XL of the heat exchange process, and mark the heat exchange process as an inefficient process or an analysis process through the efficiency coefficient XL; at the end of the monitoring cycle, perform variance calculation on the initial temperature values ​​of all analysis processes to obtain the temperature control value, perform variance calculation on the initial density values ​​of all analysis processes to obtain the density control value, compare the temperature control value with the density control value, and mark the analysis parameter and the control parameter through the comparison result; perform control optimization analysis on the molten salt heat exchanger and obtain the control optimization range of the analysis interval; perform optimization analysis on the control parameters of the molten salt heat exchanger and obtain the control optimization range of the analysis interval.

[0030] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0031] The above formulas are obtained by collecting a large amount of data and performing software simulation to select a formula close to the actual value. The coefficients in the formula are set by technicians in this field according to actual conditions; for example: Formula ; A technician in this field collects multiple groups of sample data and sets a corresponding efficiency coefficient for each group of sample data; Substitute the set efficiency coefficient and the collected sample data into the formula, any three formulas constitute a three-variable linear equation system, screen the calculated coefficients and take the average, and obtain the values ​​of m and m2 as 4.25 and 2.17 respectively; The size of the coefficient is to quantify each parameter to obtain a specific value for subsequent comparison. The size of the coefficient depends on the amount of sample data and the initial setting of the corresponding efficiency coefficient for each set of sample data by technical personnel in this field; as long as it does not affect the proportional relationship between the parameter and the quantified value, such as the efficiency coefficient is proportional to the value of the overall data.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A ventilation control system for a molten salt heat exchanger for high temperature and high pressure media, characterized in that: Including efficiency monitoring module, parameter analysis module and efficiency optimization module; The efficiency monitoring module is used to analyze the heat exchange efficiency of the molten salt heat exchanger: generate a monitoring cycle, mark the complete operation process of the lava heat exchanger within the monitoring cycle as a heat exchange process, obtain the overall data ZT and the stable data PW of the heat exchange process; obtain the efficiency coefficient XL of the heat exchange process by numerically calculating the overall data ZT and the stable data PW; mark the heat exchange process as an inefficient process or an analysis process according to the efficiency coefficient XL; The parameter analysis module is used to analyze the fluid parameters of the molten salt heat exchanger and mark the analysis parameters and the control parameters; The efficiency optimization module includes a control optimization unit and a regulation optimization unit, wherein the control optimization unit is used to perform control optimization analysis on the molten salt heat exchanger and obtain a control optimization range; The control optimization module is used to optimize and analyze the control parameters of the molten salt heat exchanger and obtain the control optimization range.

2. The ventilation control system of the molten salt heat exchanger suitable for high temperature and high pressure medium according to claim 1, characterized in that: The process of obtaining the overall data ZT and the steady data PW of the heat exchange process includes: dividing the heat exchange process into several heat exchange time periods, obtaining the average fluid temperature of the hot salt outlet and the hot salt inlet in the heat exchange time period and marking them as the heat output value and the heat input value respectively, marking the difference between the heat output value and the heat input value as the heat exchange value of the heat exchange time period, marking the ratio of the heat exchange value to the duration value of the heat exchange time period as the heat transfer coefficient of the heat exchange time period, summing and averaging the heat transfer coefficients of all heat exchange time periods in the heat exchange process to obtain the overall data ZT of the heat exchange process, and performing variance calculation on the heat transfer coefficients of all heat exchange time periods in the heat exchange process to obtain the steady data PW of the heat exchange process.

3. The ventilation control system of the molten salt heat exchanger suitable for high temperature and high pressure medium according to claim 2, characterized in that: The specific process of marking the heat exchange process as an inefficient process or an analysis process includes: comparing the efficiency coefficient XL of the heat exchange process with the preset efficiency threshold XLmin: if the efficiency coefficient XL is less than or equal to the efficiency threshold XLmin, it is determined that the heat exchange efficiency of the heat exchange process does not meet the requirements, and the corresponding heat exchange process is marked as an inefficient process, and an equipment maintenance signal is generated and sent to the mobile phone terminal of the administrator; if the efficiency coefficient XL is greater than the efficiency threshold XLmin, it is determined that the heat exchange efficiency of the heat exchange process meets the requirements, and the corresponding heat exchange process is marked as an analysis process.

4. The ventilation control system of the molten salt heat exchanger suitable for high temperature and high pressure medium according to claim 3, characterized in that: The specific process of the parameter analysis module analyzing the fluid parameters of the molten salt heat exchanger includes: at the end of the monitoring period, the initial temperature value and initial density value of the molten salt fluid corresponding to the analysis process in the monitoring period are marked as fluid parameters, the variance calculation of the initial temperature values ​​of all analysis processes is performed to obtain the temperature control value, the variance calculation of the initial density values ​​of all analysis processes is performed to obtain the density control value, the temperature control value is compared with the density control value, and the analysis parameters and the control parameters are marked through the comparison results.

5. The ventilation control system of the molten salt heat exchanger suitable for high temperature and high pressure medium according to claim 4, characterized in that: The specific process of comparing the temperature control value with the density control value includes: if the temperature control value is less than or equal to the density control value, the initial temperature value and the initial density value are marked as the control parameter and the analysis parameter respectively; if the temperature control value is greater than the density control value, the initial temperature value and the initial density value are marked as the analysis parameter and the control parameter respectively.

6. The ventilation control system of the molten salt heat exchanger suitable for high temperature and high pressure medium according to claim 5, characterized in that: The control optimization unit performs control optimization analysis on the molten salt heat exchanger: the analysis range is composed of the maximum and minimum analysis parameter values ​​of the analysis process within the monitoring period, the analysis range is divided into several analysis intervals, the analysis process whose analysis parameters are within the analysis interval is marked as the matching process of the analysis interval, the matching processes within the analysis interval are arranged in descending order according to the efficiency coefficient XL value to obtain an efficiency sequence, and the efficiency sequence is sent to the control optimization unit.

7. The ventilation control system of the molten salt heat exchanger suitable for high temperature and high pressure medium according to claim 6, characterized in that: The process of acquiring the control optimization range includes: intercepting the first L1 matching processes from the efficiency sequence and marking them as control optimization processes, the maximum and minimum values ​​of the damper opening of the air flow channel of the control optimization process constitute the control optimization range of the analysis interval, and sending the control optimization range to the efficiency monitoring module.

8. The ventilation control system of the molten salt heat exchanger suitable for high temperature and high pressure medium according to claim 7, characterized in that: The specific process of the control optimization module to optimize the control parameters of the molten salt heat exchanger includes: intercepting the first L2 matching processes from the efficiency sequence and marking them as control optimization processes, the maximum and minimum values ​​of the control parameters of the control optimization process constitute the control optimization range of the analysis interval, and sending the control optimization range to the mobile terminal of the manager.

9. A molten salt heat exchanger suitable for high temperature and high pressure media, applied to a ventilation control system of a molten salt heat exchanger suitable for high temperature and high pressure media as claimed in any one of claims 1 to 8, characterized in that: The invention comprises a shell (1), tube end sealing plates (2) are fixedly mounted on both sides of the shell (1), a uniformly distributed gas plate (3) is arranged on the top of the shell (1), a heat exchange tube is arranged between the tube end sealing plates (2) on both sides, the heat exchange tube comprises a straight tube (4) and a semi-bent tube (5) connected to the straight tube (4), a hot salt inlet, a hot salt outlet, a cold salt inlet and a cold salt outlet are arranged on one side of the shell (1); a plurality of cold salt channels are arranged between the cold salt inlet and the cold salt outlet; bottom foot pads (6) are installed at the four corners of the bottom of the shell (1).

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