Water-cooled wall high-temperature corrosion prevention route selection system, method and storage medium thereof

Abstract

The water-cooled wall high-temperature corrosion prevention and control route selection system, method and storage medium provided by the present invention include: a reducing atmosphere test module, a test location selection module, an online monitoring test data collection module and a high-temperature corrosion prevention and control strategy module. Through the four modules of the reducing atmosphere test module, the test location selection module, the online monitoring test data collection module and the high-temperature corrosion prevention and control strategy module, not only the high-temperature corrosion mechanism of the boiler water-cooled wall under low-nitrogen combustion conditions is revealed, but also effective measures are proposed to control the high-temperature corrosion in the furnace, thereby extending the service life of the boiler water-cooled wall.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler water wall high-temperature corrosion prevention and control, and in particular to a water wall high-temperature corrosion prevention and control route selection system, method and storage medium thereof. Background Art

[0002] In recent years, coal-fired power plants have made significant progress in controlling ultra-low pollutant emissions. Pollutant control technologies have been significantly improved, and the vast majority of power plants have achieved ultra-low pollutant emissions. However, the contradiction between efficient combustion and low nitrogen emissions has become more prominent. Severe localized oxygen deficiency in the furnace, coupled with the burning of high-sulfur coal, has led to very high concentrations of CO and H2S in the local atmosphere of the furnace water-cooled walls. In particular, the water-cooled walls on the side walls of the coal-fired boilers have shown obvious signs of high-temperature corrosion.

[0003] High-temperature corrosion of water-cooled walls is a relatively complex physical and chemical process with intricate reaction pathways. Clear sulfur diffusion pathways (atomic sulfur, sulfides, etc.) and corrosion mechanisms have yet to be determined. Research on the fundamental theories and key technologies for effectively coordinating the three objectives of stable ignition, high-temperature corrosion, and low nitrogen emissions is lacking. Therefore, research is particularly necessary to reveal the mechanism of high-temperature corrosion of boiler water-cooled walls under low-nitrogen combustion conditions and to propose targeted and effective measures to control high-temperature corrosion within the furnace. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a water-cooled wall high-temperature corrosion prevention and control route selection system, method and storage medium thereof, which not only reveals the high-temperature corrosion mechanism of boiler water-cooled walls under low-nitrogen combustion conditions, but also proposes targeted and effective measures to control high-temperature corrosion in the furnace, thereby extending the service life of the boiler water-cooled walls.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] The present invention provides a water-cooled wall high-temperature corrosion prevention route selection system, comprising:

[0007] A basic data testing module, comprising: a reducing atmosphere testing module and a control management module, wherein the reducing atmosphere testing module is used to test the reducing atmosphere distribution data of the water-cooled wall, and the control management module is used to collect the temperature distribution data of the water-cooled wall tube wall in the combustion area;

[0008] A test position selection module is used to select 3 to 4 positions at various stable loads and similar water-cooled wall tube temperatures based on the water-cooled wall reducing atmosphere distribution data tested under different loads, and replace the water-cooled wall tubes at the same positions in the online water-cooled wall reducing atmosphere test with water-cooled wall tubes that have undergone wall thickness measurement, product analysis, and elemental analysis; and to select 3 to 4 positions at various stable loads and similar H2S concentrations, and replace the water-cooled wall tubes at the same positions in the online water-cooled wall reducing atmosphere test with water-cooled wall tubes that have undergone wall thickness measurement, product analysis, and elemental analysis;

[0009] The online monitoring test data acquisition module is used to repeatedly record the wall thickness, product analysis, and elemental analysis data of multiple units from the hot start to the next shutdown cycle. Based on the water-cooled wall thickness reduction data, multiple curves of the relationship between water-cooled wall thickness reduction and time are drawn and fitted into a relationship formula;

[0010] The strategy module for preventing and controlling high-temperature corrosion is used to formulate targeted strategies for preventing and controlling high-temperature corrosion based on the relationship curve and relationship between water-cooling wall thickness reduction and time.

[0011] The water-cooled wall high-temperature corrosion prevention and control route selection system, method and storage medium provided by the present invention not only reveals the high-temperature corrosion mechanism of boiler water-cooled walls under low-nitrogen combustion conditions, but also proposes targeted and effective measures to control high-temperature corrosion in the furnace, thereby extending the service life of the boiler water-cooled walls.

[0012] As an optimal technical solution, the strategy module for preventing and controlling high-temperature corrosion is used to summarize the data analysis of the influencing factors of high-temperature corrosion at different locations based on the relationship curve and relationship expression between the water-cooled wall thickness reduction and time, and the data of the influencing factors of the same water-cooled wall tube temperature and different H2S concentrations on the water-cooled wall tube thickness and sulfur diffusion path, and the data of the influencing factors of the same H2S concentration and different water-cooled wall tube temperature on the water-cooled wall tube thickness and sulfur diffusion path, and formulate a targeted strategy for preventing and controlling high-temperature corrosion.

[0013] As a preferred technical solution, the strategy module for preventing and controlling high-temperature corrosion is used to slow down the initial thinning rate of the water-cooled wall tubes in the H2S high concentration area by spraying Cr-containing materials on the water-cooled wall surface or increasing the Cr content in the water-cooled wall;

[0014] Or it can be used to reduce the H2S concentration level in the area through combustion optimization adjustment and combustion anti-corrosion modification so as to reduce the thinning rate of the water-cooled wall tube wall.

[0015] As an optimal technical solution, the strategy module for preventing and controlling high-temperature corrosion is used to balance the heat load through combustion optimization and adjustment means to achieve uniform distribution of the heat load in the furnace. At the same time, it can reduce the tube wall temperature to the low temperature zone by adding a wall-adhering wind method in the medium and high temperature areas to reduce the thinning rate of the water-cooled wall tube wall.

[0016] As a preferred technical solution, the control management module is also used to receive online testing data of the reducing atmosphere of the water-cooled wall.

[0017] The present invention also provides a method for selecting a route for preventing and controlling high-temperature corrosion of a water-cooled wall, comprising the following steps:

[0018] During hot operation of the S1 unit, the water-cooled wall reducing atmosphere distribution data was tested under stable load on multiple boilers, and the water-cooled wall tube temperature distribution data in the combustion area was collected;

[0019] S2 Based on the water-cooled wall reducing atmosphere distribution data tested under different loads, select 3 to 4 locations at each stable load and similar water-cooled wall tube temperature, and replace the water-cooled wall tubes at the same locations of the online water-cooled wall reducing atmosphere test with water-cooled wall tubes that have undergone wall thickness measurement, product analysis, and elemental analysis; select 3 to 4 locations at each stable load and similar H2S concentration, and replace the water-cooled wall tubes at the same locations of the online water-cooled wall reducing atmosphere test with water-cooled wall tubes that have undergone wall thickness measurement, product analysis, and elemental analysis;

[0020] From the hot start of the S3 unit to the next shutdown, the H2S concentration at multiple measuring points was counted for all time periods, and the arithmetic average was calculated. The water-cooled wall of the test section was then cut and thickness measurement, product analysis, and elemental analysis were performed again. The wall thickness data, product analysis, and elemental analysis data were recorded repeatedly for multiple cycles. Based on the wall thickness reduction data, multiple curves of the relationship between wall thickness reduction and time were drawn and fitted into a relationship equation.

[0021] S4 formulates and proposes targeted strategies to prevent and control high-temperature corrosion based on the relationship curve and relationship between water-cooled wall thickness reduction and time.

[0022] As a preferred technical solution, after drawing multiple curves of the relationship between wall thickness thinning and time in step S3 and fitting them into a relationship expression, the following steps are also included: collecting data on the influence of different H2S concentrations under the same water-cooled wall tube temperature conditions, and the influence of the same H2S concentration conditions and different water-cooled wall tube temperatures on the water-cooled wall tube thinning rate; at the same time, recording corrosion product analysis and related element analysis data at different periods and different H2S concentrations, and collecting sulfur dynamic diffusion path data.

[0023] As a preferred technical solution, step S4 also includes: summarizing the data analysis of the influencing factors of high-temperature corrosion at different locations based on the influence data of the same water-wall tube temperature and H2S concentration on the wall thickness and sulfur diffusion path, and formulating corresponding strategies for preventing and controlling high-temperature corrosion, wherein the strategies for preventing and controlling high-temperature corrosion include the following steps: spraying Cr-containing materials on the water-wall surface or increasing the Cr content in the water-wall in the H2S high concentration area to slow down the initial thinning rate of the water-wall tube, or reducing the H2S concentration level in the area through combustion optimization adjustment or combustion anti-corrosion modification to reduce the thinning rate of the water-wall tube.

[0024] As a preferred technical solution, the strategy for preventing and controlling high-temperature corrosion in step S4 also includes the following steps: balancing the heat load by means of combustion optimization adjustment to achieve uniform distribution of the heat load in the furnace, and at the same time reducing the temperature of the water-cooled wall tube wall to the low-temperature zone by adding a wall-mounted wind method in the medium and high-temperature areas to reduce the thinning rate of the water-cooled wall tube wall.

[0025] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for selecting a route for preventing and controlling high-temperature corrosion of a water-cooled wall.

[0026] The present invention provides a water-wall high-temperature corrosion prevention and control route selection system, method and storage medium thereof, which not only reveals the high-temperature corrosion mechanism of boiler water-cooled walls under low-nitrogen combustion conditions, but also proposes targeted and effective measures to control high-temperature corrosion in the furnace, thereby extending the service life of the boiler water-cooled walls. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The distribution diagram of reducing atmosphere measurement points of the water-cooled wall in the furnace combustion area provided by the present invention;

[0028] Figure 2 Schematic diagram of water wall tube thinning under different H2S concentrations provided by the present invention;

[0029] Figure 3 Schematic diagram of water-cooled wall tube thinning amount at different tube wall temperatures provided by the present invention;

[0030] Figure 4 A flow chart of the water-cooled wall high-temperature corrosion prevention route selection system provided by the present invention;

[0031] 1-Overburnt air area; 2-Burner area; 3-Measuring hole; 4-Front wall. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] It can be understood that the present invention is to achieve the purpose of the present invention through some embodiments, such as Figure 4 As shown, the present invention provides a water-cooled wall high-temperature corrosion prevention route selection system, comprising:

[0034] A basic data testing module, comprising: a reducing atmosphere testing module and a control management module, wherein the reducing atmosphere testing module is used to test the reducing atmosphere distribution data of the water-cooled wall, and the control management module is used to collect the temperature distribution data of the water-cooled wall tube wall in the combustion area;

[0035] A test position selection module is used to select 3 to 4 positions at various stable loads and similar water-cooled wall tube temperatures based on the water-cooled wall reducing atmosphere distribution data tested under different loads, and replace the water-cooled wall tubes at the same positions in the online water-cooled wall reducing atmosphere test with water-cooled wall tubes that have undergone wall thickness measurement, product analysis, and elemental analysis; and to select 3 to 4 positions at various stable loads and similar H2S concentrations, and replace the water-cooled wall tubes at the same positions in the online water-cooled wall reducing atmosphere test with water-cooled wall tubes that have undergone wall thickness measurement, product analysis, and elemental analysis;

[0036] The online monitoring test data acquisition module is used to repeatedly record the wall thickness, product analysis and elemental analysis data of multiple units from the hot start to the next shutdown cycle. Based on the water-cooled wall thickness reduction data, multiple curves of the relationship between water-cooled wall thickness reduction and time are drawn and fitted into a relationship formula;

[0037] A strategy module for preventing and controlling high-temperature corrosion, which is used to formulate targeted strategies for preventing and controlling high-temperature corrosion based on the relationship curve and equation between water-cooled wall thickness reduction and time;

[0038] The strategy module for preventing and controlling high-temperature corrosion is used to summarize the data on the influencing factors of high-temperature corrosion at different locations and analyze the data on the influencing factors of high-temperature corrosion at different locations based on the relationship curve between the water-cooled wall thickness reduction and time and the relationship equation, which records the data on the influencing factors of water-cooled wall tube thickness and sulfur diffusion path under the same water-cooled wall temperature and different H2S concentrations, and the data on the influencing factors of water-cooled wall tube thickness and sulfur diffusion path under the same H2S concentrations and different water-cooled wall tube temperatures, and formulate a targeted strategy for preventing and controlling high-temperature corrosion;

[0039] The high-temperature corrosion prevention strategy module is also used to slow down the initial thinning rate of the water-cooled wall tubes in the H2S high concentration area by spraying Cr-containing materials on the water-cooled wall surface or increasing the Cr content in the water-cooled wall.

[0040] Or it can be used to reduce the H2S concentration level in the area through combustion optimization adjustment and combustion anti-corrosion modification to reduce the thinning rate of the water-cooled wall tube wall;

[0041] The strategy module for preventing and controlling high-temperature corrosion is also used to balance the heat load through combustion optimization and adjustment means to achieve uniform distribution of the heat load in the furnace. At the same time, it can reduce the tube wall temperature to the low-temperature zone by adding a wall-mounted wind method in the medium and high-temperature areas to reduce the thinning rate of the water-cooled wall tube wall. This not only reveals the high-temperature corrosion mechanism of the boiler water-cooled wall under low-nitrogen combustion conditions, but also puts forward effective measures to control high-temperature corrosion in the furnace, thereby extending the service life of the boiler water-cooled wall.

[0042] The present invention also provides a method for selecting a route for preventing and controlling high-temperature corrosion of a water-cooled wall, comprising the following steps:

[0043] When the S1 unit is running hot, the reducing atmosphere distribution data of the water-cooled wall is tested under the stable boiler load, and the temperature distribution data of the water-cooled wall tube wall in the combustion area is collected;

[0044] S2 Based on the water-cooled wall reducing atmosphere distribution data tested under different loads, select 3 to 4 locations at each stable load and similar water-cooled wall tube temperature, and replace the water-cooled wall tubes at the same locations of the online water-cooled wall reducing atmosphere test with water-cooled wall tubes that have undergone wall thickness measurement, product analysis, and elemental analysis; select 3 to 4 locations at each stable load and similar H2S concentration, and replace the water-cooled wall tubes at the same locations of the online water-cooled wall reducing atmosphere test with water-cooled wall tubes that have undergone wall thickness measurement, product analysis, and elemental analysis;

[0045] From the hot start-up of the S3 unit to the next shutdown, H2S concentrations at multiple measuring points during all time periods were counted and averaged. The water-cooled wall of the test section was then cut and thickness measurement, product analysis, and elemental analysis were performed again. The wall thickness data, product analysis, and elemental analysis data were recorded repeatedly for multiple cycles. Based on the wall thickness thinning data, multiple curves of the relationship between wall thickness thinning and time were drawn and fitted into a relationship. Data on the effect of the same water-cooled wall temperature, the same H2S concentration, and different water-cooled wall temperatures on the water-cooled wall thinning rate were collected. At the same time, corrosion product analysis and related elemental analysis data were recorded at different time periods and at different H2S concentrations, and data on the sulfur dynamic diffusion path were collected.

[0046] S4 summarizes the data on the influence of the same water-wall tube temperature and H2S concentration on the wall thickness and sulfur diffusion path, and the data on the influence factors of the same H2S concentration and different water-wall tube temperatures on the wall thickness and sulfur diffusion path, and formulates corresponding strategies for preventing and controlling high-temperature corrosion. The strategies for preventing and controlling high-temperature corrosion include the following steps: in the H2S high concentration area, spraying Cr-containing materials on the water-wall surface or increasing the Cr content in the water-wall to slow down the initial thinning rate of the water-wall tube, or reducing the H2S concentration level in the area through transformation methods such as combustion optimization adjustment or combustion anti-corrosion to reduce the thinning rate of the water-wall tube wall;

[0047] Or the heat load can be balanced by combustion optimization adjustment means to achieve uniform distribution of heat load in the furnace. At the same time, the temperature of the water-cooled wall tube can be reduced to the low temperature zone by adding wall-mounted wind in the medium and high temperature areas to reduce the thinning rate of the water-cooled wall tube.

[0048] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for selecting a route for preventing and controlling high-temperature corrosion of a water-cooled wall.

[0049] The present invention provides a water-wall high-temperature corrosion prevention and control route selection system, method and storage medium thereof, which not only reveals the high-temperature corrosion mechanism of boiler water-cooled walls under low-nitrogen combustion conditions, but also proposes targeted and effective measures to control high-temperature corrosion in the furnace, thereby extending the service life of the boiler water-cooled walls.

[0050] The present invention also provides a method for selecting a route for preventing and controlling high-temperature corrosion of a water-cooled wall, comprising the following steps:

[0051] S1: Basic data test: When the unit is running in hot state, at three stable loads of 100%, 75% and 50%, use the following Figure 1 The schematic diagram shows the location of measuring hole 3 (the measurement holes 3 can be arranged according to the severity of high-temperature corrosion in the furnace under cold state, and the principle is that the more severe the area, the more measuring holes 3 should be installed). The test tube is opened on the fin and led out with a Φ6mm or Φ8mm stainless steel tube and extends 20 to 30cm beyond the insulation layer. The flue gas composition test mainly includes the test of reducing atmosphere (O2 / CO / H2S), among which O2 and CO are tested by TESTO350 flue gas analyzer, and H2S is tested by SPGAS PORT flue gas analyzer. The control and management module includes: DCS system and SIS system. At the same time, the water-cooled wall temperature data of the DCS or SIS system in the same time period is recorded.

[0052] S2: Select a test location and install an online reducing atmosphere (O2 / CO / H2S) monitoring device. Based on the basic test data, the reducing atmosphere and tube wall temperature distribution data under different load conditions are mastered. Select 3 to 4 locations with different reducing atmosphere concentrations (mainly different H2S concentrations) at the same or similar tube wall temperature, and name them a1 to a4. When the unit is shut down for maintenance, install an online reducing atmosphere (O2 / CO / H2S) monitoring device at this location and connect the data to the DCS or MIS system. Cut a 20-30 cm long section of water-cooled wall tube wall that has undergone thickness measurement, XRD product analysis, and EDS element analysis, and replace it with the water-cooled wall tube at the same location where the online reducing atmosphere (O2 / CO / H2S) monitoring is performed.

[0053] Based on the basic test data, the reducing atmosphere and tube wall temperature distribution data under different load conditions were mastered. Three to four different tube wall temperature test locations b1 to b4 were selected under stable load and similar H2S concentrations. When the unit was shut down for maintenance, an online reducing atmosphere (O2 / CO / H2S) monitoring device was installed and the data was connected to the DCS or MIS system. At the same time, a 20-30 cm long section of water-cooled wall tube wall data that had been subjected to thickness measurement, XRD product analysis, and EDS elemental analysis was cut to replace the water-cooled wall tube data at the same location of the online O2 / CO / H2S monitoring.

[0054] S3: Collection of online monitoring test data: After the unit is hot-started until the next stop for maintenance or adjustment, the H2S concentration in all time periods at measuring points a1 to a4 is counted. At the same time, the H2S concentration and tube wall temperature in all time periods at measuring points b1 to b4 are counted and averaged. A 2-3 cm long section of the test water-cooled wall is cut and thickness measurement, XRD product analysis, and EDS element analysis are performed again. Repeat this process for 2-3 cycles of wall thickness data, product analysis, and element analysis. Based on the wall thickness reduction, 3-4 curves of the relationship between wall thickness reduction and time are drawn and fitted into a relationship, such as Figures 2 and 3 As shown, the influence of different H2S concentrations on water-cooled wall tube thinning under the same water-cooled wall tube temperature conditions, as well as the influence of different tube temperatures on water-cooled wall tube thinning under the same H2S concentration conditions, mainly including but not limited to the influence on thinning rate; at the same time, the corrosion products and related element analysis at different periods and different H2S concentrations were recorded to understand the sulfur dynamic diffusion path;

[0055] S4: Based on the online monitoring data and relationship curves, as well as the analysis of corrosion products and related elements at different times, a targeted strategy for preventing and controlling high-temperature corrosion can be proposed; Based on the characteristic curve of H2S concentration and tube wall temperature on the thinning of water-cooled tube wall and the analysis data of corrosion products and related elements at different times, a targeted strategy for preventing and controlling high-temperature corrosion can be proposed; Figures 2 and 3Take the following examples to illustrate: Figure 2 Medium operating condition 1 is low H2S concentration, operating condition 2 is medium H2S concentration, and operating condition 5 is high H2S concentration. Under medium and low concentrations, the water wall thinning rate is basically the same in different time periods. Under high concentration, the water wall thinning rate gradually decreases over time. At the same time, as the H2S concentration gradually increases, the corrosion products become richer. At medium and low concentrations, FeS and MnS are the main ones, while Cr2S3 and Cr7S8 are increased under high concentration. That is, in the high H2S concentration area, it is advisable to slow down the initial thinning rate of the water wall by spraying Cr-containing materials on the water wall surface or increasing the Cr content in the water wall. It is also possible to reduce the H2S concentration level in this area and reduce the thinning rate of the water wall tube wall by modification methods such as combustion optimization adjustment or combustion anti-corrosion.

[0056] like Figure 3 As shown, Figure 3 Condition 3 is low tube wall temperature, Condition 4 is medium tube wall temperature, and Condition 5 is high tube wall temperature. At low tube wall temperature, the water wall thinning rate is very slow; at medium tube wall temperature, the water wall thinning rate accelerates with time; at high tube wall temperature, the water wall thinning rate slows down with time. At the same time, as the H2S concentration gradually increases, the corrosion products become richer. At medium and low temperatures, FeS, Cr2S3, and MnS are the main corrosion products, while Cr7S8 and Fe7S8 increase at high temperatures. This means that the heat load in the furnace should be distributed as evenly as possible during the design phase. In actual operation, the heat load should be balanced through combustion optimization and adjustment to avoid the occurrence of local high temperatures. At the same time, the thinning rate of the water wall can be reduced to the low temperature zone by adding a wall-mounted airflow in the medium and high temperature areas. This not only reveals the high-temperature corrosion mechanism of the boiler water wall under low-nitrogen combustion conditions, but also proposes effective measures to control high-temperature corrosion in the furnace and extend the service life of the boiler water wall.

[0057] It will be appreciated that the present invention is described through some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are subject to various changes or equivalent substitutions. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope protected by the present invention.

Claims

1. A water-wall high-temperature corrosion prevention route selection system, characterized in that: include: A basic data testing module, comprising: a reducing atmosphere testing module and a control management module, wherein the reducing atmosphere testing module is used to test the reducing atmosphere distribution data of the water-cooled wall, and the control management module is used to collect the temperature distribution data of the water-cooled wall tube wall in the combustion area; The test position selection module is used to select 3~4 positions under various stable loads and similar water-cooled wall tube wall temperatures according to the water-cooled wall reducing atmosphere distribution data tested under different loads, and replace the water-cooled wall tubes at the same positions of the online water-cooled wall reducing atmosphere test with water-cooled wall tubes that have undergone wall thickness measurement, product analysis, and elemental analysis; select 3~4 positions under various stable loads and similar H2S concentrations, and replace the water-cooled wall tubes at the same positions of the online water-cooled wall reducing atmosphere test with water-cooled wall tubes that have undergone wall thickness measurement, product analysis, and elemental analysis. The online monitoring test data acquisition module is used to repeatedly record the wall thickness, product analysis, and elemental analysis data of multiple units from the hot start to the next shutdown cycle. Based on the water-cooled wall thickness reduction data, multiple curves of the relationship between water-cooled wall thickness reduction and time are drawn and fitted into a relationship formula; The high-temperature corrosion prevention strategy module is used to formulate targeted high-temperature corrosion prevention strategies based on the relationship curve and relationship between water-cooled wall thickness reduction and time. The targeted high-temperature corrosion prevention strategies include: In the H2S high concentration area, the initial thinning rate of the water wall tube is slowed down by spraying Cr-containing materials on the water wall surface or increasing the Cr content in the water wall. Alternatively, the H2S concentration level in this area can be reduced through combustion optimization adjustment and combustion anti-corrosion modification to reduce the thinning rate of the water-cooled wall tube.

2. The water-wall high-temperature corrosion prevention route selection system according to claim 1 is characterized in that: The strategy module for preventing and controlling high-temperature corrosion is used to summarize the data analysis of influencing factors of high-temperature corrosion at different locations based on the relationship curve and relationship expression between the water-cooled wall thickness reduction and time, which records the data of influencing factors of the same water-cooled wall tube temperature and different H2S concentrations on the water-cooled wall tube thickness and sulfur diffusion path, and the data of influencing factors of the same H2S concentration and different water-cooled wall tube temperature on the water-cooled wall tube thickness and sulfur diffusion path, and formulate a targeted strategy for preventing and controlling high-temperature corrosion.

3. The water-wall high-temperature corrosion prevention route selection system according to claim 2, characterized in that: The strategy module for preventing and controlling high-temperature corrosion is used to balance the heat load through combustion optimization and adjustment means to achieve uniform distribution of the heat load in the furnace. At the same time, it can reduce the tube wall temperature to the low temperature zone by adding a wall-mounted wind method in the medium and high temperature areas to reduce the thinning rate of the water-cooled wall tube wall.

4. The water-cooled wall high-temperature corrosion prevention route selection system according to claim 1, characterized in that: The control management module is also used to receive online testing data of the reducing atmosphere of the water-cooled wall.

5. A method for selecting a route for preventing and controlling high-temperature corrosion of a water-cooled wall, characterized in that: Running the water-cooled wall high-temperature corrosion prevention route selection system according to any one of claims 1 to 4 comprises the following steps: During hot operation of the S1 unit, the water-cooled wall reducing atmosphere distribution data was tested under stable load on multiple boilers, and the water-cooled wall tube temperature distribution data in the combustion area was collected; S2 Based on the reducing atmosphere distribution data of the water-cooled wall tested under different loads, select 3 to 4 locations at each stable load and similar water-cooled wall tube temperature, and replace the water-cooled wall tubes at the same locations of the online water-cooled wall reducing atmosphere test with water-cooled wall tubes that have been measured for wall thickness, product analysis, and elemental analysis; select 3 to 4 locations at each stable load and similar H2S concentration, and replace the water-cooled wall tubes at the same locations of the online water-cooled wall reducing atmosphere test with water-cooled wall tubes that have been measured for wall thickness, product analysis, and elemental analysis; From the hot start of the S3 unit to the next shutdown, the H2S concentration at multiple measuring points was counted for all time periods, and the arithmetic average was calculated. The water-cooled wall of the test section was then cut and thickness measurement, product analysis, and elemental analysis were performed again. The wall thickness data, product analysis, and elemental analysis data were recorded repeatedly for multiple cycles. Based on the wall thickness reduction data, multiple curves of the relationship between wall thickness reduction and time were drawn and fitted into a relationship equation. S4 formulates and proposes targeted strategies to prevent and control high-temperature corrosion based on the relationship curve and relationship between water-cooled wall thickness reduction and time.

6. The method for selecting a route for preventing and controlling high-temperature corrosion of a water-cooled wall according to claim 5, characterized in that: After drawing multiple curves of the relationship between wall thickness thinning and time in step S3 and fitting them into a relationship expression, the following steps are also included: collecting data on the influence of different H2S concentrations under the same water-cooled wall tube temperature conditions, and the influence of the same H2S concentration conditions and different water-cooled wall tube temperatures on the water-cooled wall tube thinning rate; at the same time, recording corrosion product analysis and related element analysis data under different periods and different H2S concentrations, and collecting sulfur dynamic diffusion path data.

7. The method for selecting a route for preventing and controlling high-temperature corrosion of a water-cooled wall according to claim 5, characterized in that: Step S4 also includes: summarizing the data analysis of the influencing factors of high-temperature corrosion at different locations based on the influence data of the same water-wall tube temperature and H2S concentration on the wall thickness and sulfur diffusion path, and formulating corresponding strategies for preventing and controlling high-temperature corrosion, wherein the strategies for preventing and controlling high-temperature corrosion include the following steps: spraying Cr-containing materials on the water-wall surface or increasing the Cr content in the water-wall in the H2S high concentration area to slow down the initial thinning rate of the water-wall tube, or reducing the H2S concentration level in the area by combustion optimization adjustment or combustion anti-corrosion modification to reduce the thinning rate of the water-wall tube.

8. The method for selecting a route for preventing and controlling high-temperature corrosion of a water-cooled wall according to claim 5, characterized in that: The strategy for preventing and controlling high-temperature corrosion in step S4 also includes the following steps: balancing the heat load by means of combustion optimization adjustment to achieve uniform distribution of the heat load in the furnace, and at the same time reducing the temperature of the water-cooled wall tube to the low-temperature zone by adding a wall-mounted wind method in the medium and high-temperature areas to reduce the thinning rate of the water-cooled wall tube.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method for selecting a route for preventing and controlling high-temperature corrosion of a water-cooled wall as described in any one of claims 5 to 8 is implemented.

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